CN112622271A - Water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control - Google Patents
Water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control Download PDFInfo
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- CN112622271A CN112622271A CN202011400364.0A CN202011400364A CN112622271A CN 112622271 A CN112622271 A CN 112622271A CN 202011400364 A CN202011400364 A CN 202011400364A CN 112622271 A CN112622271 A CN 112622271A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Abstract
A water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control relates to the technical field of 3D printers and comprises a nozzle seat, a nozzle assembly, a water-cooling system, an air-cooling system and a control device; the two ends of the spray head seat are provided with a material hole and an air hole, a main cooling channel is arranged between the material hole and the air hole, and the upper part of the spray head seat is provided with a water inlet and a water outlet; the spray head assembly comprises a throat pipe, a heating block and a spray nozzle, wherein a positioning pin is fixed on the upper surface of the heating block, and the positioning pin and the throat pipe are respectively inserted into the positioning hole and the material hole; the water cooling system comprises a temperature measuring instrument, a cooling device and a water pump, wherein the inlet of the water pump and the outlet of the cooling device are respectively and correspondingly connected with the water outlet and the water inlet of the spray head seat, and a temperature probe of the temperature measuring instrument is hermetically arranged at the through end of the main cold channel; the air cooling system comprises an air pump, the air pump is correspondingly connected with the upper end of the air hole, and an air cooling nozzle is arranged at the lower end of the air hole; this print shower nozzle assembly passes through air-cooled system and water cooling system linkage cooling, very big improvement the radiating effect.
Description
Technical Field
The invention relates to the technical field of 3D printers, in particular to a water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control.
Background
At present, 3D printers using fused deposition modeling technology are more and more widely applicable to consumable materials, and the printing temperature also covers a temperature range from 90 to 450 ℃, which brings great test to the heat dissipation of a printing nozzle; the shower nozzle heat dissipation function commonly used mainly acts on radiating block and nozzle position, and single cooling mode can't compromise the great multiple printing consumptive material of printing temperature requirement difference, designs the volume that many places heat dissipation functional unit have increased the shower nozzle to a certain extent, also makes cooling system loaded down with trivial details simultaneously, especially when high temperature is printed, and conventional radiator fan reliability is lower, can't satisfy the heat dissipation demand to the radiating block when printing.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a water-cooling and air-cooling integrated printing spray head assembly based on closed-loop control, and the heat dissipation effect is greatly improved through linkage cooling of an air cooling system and a water cooling system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control comprises a nozzle seat, a nozzle assembly, a water-cooling system, an air-cooling system and a control device; the center of the two ends of the spray head seat is respectively provided with a material hole and an air hole which penetrate through the upper surface and the lower surface of the spray head seat, a main cooling channel which is positioned in the upper part of the spray head seat and has one end penetrating through the side surface of the spray head seat is arranged between the material hole and the air hole, and the upper part of the end surface of the spray head seat, which is close to the material hole, is provided with a water inlet and a water outlet which are respectively communicated to the vicinity; the spray head assembly comprises a throat pipe, a heating block and a spray nozzle which are sequentially and correspondingly connected, a positioning pin is fixed on the upper surface of the heating block, and the positioning pin and the throat pipe are respectively and adaptively inserted into a positioning hole and a material hole which are correspondingly arranged on the spray head seat; the water cooling system comprises a temperature measuring instrument, a cooling device and a water pump arranged at the inlet of the cooling device, the inlet of the water pump and the outlet of the cooling device are respectively and correspondingly connected with the water outlet and the water inlet of the spray head seat through water cooling hoses, and a temperature probe of the temperature measuring instrument is hermetically arranged at the through end of the main cooling channel; the air cooling system comprises an air pump, the outlet end of the air pump is correspondingly connected with the upper end of an air hole through a pneumatic hose, and a universal adjustable air cooling nozzle is installed at the lower end of the air hole; and the control device is respectively in signal connection with the temperature measuring instrument, the cooling device, the water pump and the air pump.
Furthermore, the lower part of the end face, close to the material hole, of the spray head seat is provided with a limiting groove, a limiting clamping plate is movably inserted into the limiting groove, the inner end of the limiting clamping plate is fixedly connected with the bottom of the limiting groove through a limiting spring, the middle plate surface of the limiting clamping plate is provided with a movable through hole with the diameter larger than the pipe diameter of the throat pipe, and the inner side of the movable through hole is communicated with a clamping hole which is adaptive to the pipe wall of the corresponding throat pipe in a clamping mode.
Furthermore, the inner end face of the limiting clamping plate and the bottom face of the limiting groove are respectively provided with a spring groove which is matched with and fixed by inserting two ends of the limiting spring.
Furthermore, the pipe wall of the throat pipe is provided with a clamping groove which is matched with the edge of the clamping hole and is clamped in.
Furthermore, the water inlet and the water outlet are respectively positioned at two sides of the throat and are close to the throat.
Further, water-cooling connectors are installed at the water inlet and the water outlet.
Further, the upper end of the air hole is provided with a pneumatic connector.
Furthermore, the number of the positioning pins is two, and the two positioning pins are respectively and correspondingly positioned on two sides of the throat pipe.
Further, the cooling device is an air-cooled cooler with a cooling fan.
Furthermore, the air cooling nozzle is a universal adjusting pipe with one end in threaded connection with the lower end of the air hole.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the water-cooling and air-cooling integrated printing spray head assembly based on closed-loop control, the circulating heat dissipation system is formed by the water pump, the cooling device and the main cold channel of the spray head seat, heat can be continuously dissipated to the throat pipe, and compared with the traditional heat dissipation block, the air blowing heat dissipation method is better in heat dissipation effect; the control device is used for obtaining real-time temperature feedback of the main cooling channel, closed-loop control of the flow of the water pump and the heat dissipation power of the cooling device is realized, the purpose of timely temperature adjustment is achieved, the spray head seat and the throat pipe are at relatively stable temperature, and the occurrence of the plug condition in the high-temperature printing process is avoided; when the gas generated by the air pump passes through the air holes, the gas is sprayed out by the air cooling nozzle after being cooled by water, so that the cooling effect of printing consumables is enhanced, the occurrence of wire drawing and consumable bonding conditions is avoided, the universal adjustable air cooling nozzle is adopted, the concentrated heat dissipation of the nozzle aligned with the nozzle assembly after adjustment is facilitated, and the heat dissipation effect is greatly improved; through the integrated design of the spray head seat, the invention improves the heat dissipation effect, avoids the increase of the volume, and has smart design and reasonable layout; in addition, the quick-release structure of the spray head assembly is designed through the limiting clamping plate, so that the spray head assembly is convenient to assemble, disassemble and maintain quickly.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is another side perspective view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the present invention at the primary cold aisle;
FIG. 4 is a schematic cross-sectional view of the present invention at the position of the position-limiting clamping plate;
fig. 5 is a signal connection diagram of the control device.
In the figure: 1. a nozzle base; 101. material holes; 102. a wind hole; 103. a primary cold aisle; 104. a water outlet; 105. a water inlet; 106. positioning holes; 2. an air-cooled nozzle; 3. positioning pins; 4. a heating block; 5. a nozzle; 6. a throat; 7. a limiting clamping plate; 701. movable perforation; 702. a clamping hole; 8. a water-cooled joint; 9. a pneumatic joint; 10. a temperature probe; 11. a limiting spring; 12. an air pump; 13. a control device; 14. a temperature measuring instrument; 15. a cooling device; 16. and (4) a water pump.
Detailed Description
The present invention will be explained in detail by the following examples, which are intended to disclose the invention and protect all technical improvements within the scope of the invention, and the invention is not limited to the following examples; in the description of the present invention, it should be understood that, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., which corresponds to the drawings of the present application, the present invention is described for convenience, but does not indicate or imply that the indicated device or element must have a particular orientation:
the water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control, which is described in conjunction with the attached drawings 1-5, comprises a nozzle seat 1, a nozzle assembly, a water-cooling system, an air-cooling system and a control device 13; the center of the two ends of the nozzle base 1 is respectively provided with a material hole 101 and an air hole 102 which penetrate through the upper surface and the lower surface of the nozzle base 1, the material hole 101 and the air hole 102 are vertically arranged, a main cooling channel 103 which is positioned in the upper part of the nozzle base 1 and has one end penetrating through the side surface of the nozzle base 1 is arranged between the material hole 101 and the air hole 102, the main cooling channel 103 is horizontally arranged, the main cooling channel 103 can be arranged closer to the material hole 101, and the water cooling effect on the throat pipe 6 is improved; the upper part of the end surface of the spray head base 1 close to the material hole 101 is provided with a water inlet 105 and a water outlet 104 which are respectively communicated to the two ends of the main cold channel 103 and used for leading circulating water in and out of the main cold channel 103; according to requirements, the water inlet 105 and the water outlet 104 are respectively positioned at two sides of the throat 6 and close to the throat 6, and the cooling effect is increased by surrounding the throat 6; in addition, the water inlet 105 and the water outlet 104 are both provided with water cooling joints 8, so that the water pipe can be conveniently and quickly disassembled; through the integrated design of the spray head seat 1, the invention improves the heat dissipation effect, avoids the increase of the volume, and has smart design and reasonable layout;
the spray head assembly comprises a throat pipe 6, a heating block 4 and a spray nozzle 5 which are sequentially and correspondingly connected, a positioning pin 3 is fixed on the upper surface of the heating block 4, the positioning pin 3 and the throat pipe 6 are respectively matched and inserted into a positioning hole 106 and a material hole 101 which are correspondingly arranged on the spray head seat 1, the positioning pin 3 is used for positioning, the throat pipe 6 is convenient to insert and mount, the spray head assembly is also stably connected with the spray head seat 1, and the throat pipe 6 is prevented from being broken; in addition, two positioning pins 3 are arranged and are respectively and correspondingly positioned on two sides of the throat 6, so that balance is ensured; according to the requirement, the lower part of the end face, close to the material hole 101, of the spray head base 1 is provided with a limiting groove, a limiting clamping plate 7 is movably inserted into the limiting groove, the inner end of the limiting clamping plate 7 is fixedly connected with the bottom of the limiting groove through a limiting spring 11, the middle plate surface of the limiting clamping plate 7 is provided with a movable through hole 701 with the diameter larger than the pipe diameter of the throat pipe 6, the inner side of the movable through hole 701 is communicated with a clamping hole 702 which is matched and clamped with the pipe wall of the corresponding throat pipe 6, before the nozzle assembly is installed, the limiting clamping plate 7 is pressed firstly to enable the movable through hole 701 to be aligned with the material hole 101, then the throat pipe 6 is inserted into the material hole 101, the top end of the throat pipe 6 penetrates through the movable through hole 701, and then the limiting clamping plate 7 is loosened, so that the; when the nozzle assembly needs to be detached, the limiting clamping plate 7 is only required to be pressed, and the throat pipe 6 is pulled out; in addition, the inner end surface of the limiting clamping plate 7 and the bottom surface of the limiting groove are respectively provided with spring grooves which are matched with and inserted and fixed at two ends of the limiting spring 11, and the spring is limited in the radial direction; in addition, the pipe wall of the throat pipe 6 is provided with a clamping groove for the edge of the adaptive clamping hole 702 to be clamped, so that the pipe wall of the throat pipe 6 can be clamped by the clamping hole 702 conveniently, or the edge of the clamping hole 702 is provided with a groove, and the corresponding pipe wall of the throat pipe 6 is provided with a convex point adaptive to the groove, so that the same effect can be achieved; the quick-release type spray head assembly simplifies the replacement process of the spray head assembly, the whole spray head assembly has high function integration degree, and the throat 6 can adopt pure copper spiral radiating fins to match with a stainless steel pipe body, so that the structural strength and the radiating performance are both considered; in addition, the total length of the throat pipe 6 is 40mm, the effective heat dissipation length is 29.5mm, the length of the contact heating element is 7mm, the heat dissipation effect is guaranteed, meanwhile, the enough consumable preheating length is considered, and the consumable is smoothly changed from a solid state to a molten state in the throat pipe 6 through water cooling and rapid heat dissipation;
the water cooling system comprises a temperature measuring instrument 14, a cooling device 15 and a water pump 16 arranged at the inlet of the cooling device 15, the inlet of the water pump 16 and the outlet of the cooling device 15 are correspondingly connected with a water outlet 104 and a water inlet 105 of the nozzle seat 1 through water cooling hoses respectively, a temperature probe 10 of the temperature measuring instrument 14 is hermetically arranged at the through end of the main cooling channel 103, in addition, the through end of the main cooling channel 103 can also be plugged by adopting a plug, but the temperature probe 10 needs to be integrally arranged in the plug so as to be convenient for detecting the liquid temperature in the main cooling channel 103, a circulating heat dissipation system is formed by the water pump 16, the cooling device 15 and the main cooling channel 103 of the nozzle seat 1, the throat pipe 6 can be continuously dissipated heat, and the heat dissipation effect is better compared with the traditional heat dissipation block fan for; according to the requirement, the cooling device 15 is an air cooling cooler with a radiating fan, so that the device is simple and the radiating efficiency of the radiating fan is convenient to control; in addition, the installation position of the temperature probe 10 is close to the water outlet 104, so that the actual temperature of the nozzle seat 1 can be more accurately grasped and adjusted; the air cooling system comprises an air pump 12, the outlet end of the air pump 12 is correspondingly connected with the upper end of an air hole 102 through a pneumatic hose, a universal adjustable air cooling nozzle 2 is installed at the lower end of the air hole 102, and gas generated by the air pump 12 is sprayed out of the air cooling nozzle 2 after being cooled by water when passing through the air hole 102, so that the cooling effect of printing consumables is enhanced, the occurrence of wire drawing and consumable bonding conditions is avoided, the universal adjustable air cooling nozzle 2 is adopted, the concentrated heat dissipation is convenient to align to a nozzle 5 of a spray head assembly after being adjusted, and the heat dissipation effect is greatly improved; according to the requirement, the upper end of the air hole 102 is provided with a pneumatic connector 9, so that the pneumatic hose can be conveniently and quickly disassembled; in addition, the air cooling nozzle 2 is a universal adjusting pipe with one end in threaded connection with the lower end of the air hole 102, so that the air cooling nozzle 2 can be conveniently adjusted and fixed;
the control device 13 is respectively in signal connection with the temperature measuring instrument 14, the cooling device 15, the water pump 16 and the air pump 12; the control device is used for obtaining real-time temperature feedback of the main cooling channel, closed-loop control of the flow of the water pump and the heat dissipation power of the cooling device is realized, the purpose of timely temperature adjustment is achieved, the spray head seat and the throat pipe are at relatively stable temperature, and the occurrence of the plug condition in the high-temperature printing process is avoided; in addition, the air cooling system and the water cooling system can be independently controlled by the control device 13, so that the air cooling system and the water cooling system can be conveniently and independently used and adjusted; it should be noted that the water cooling system is located at the distal end of the print head assembly, and the print head assembly and the water cooling system are located in temperature independent areas.
The present invention is not described in detail in the prior art.
Claims (10)
1. The utility model provides a shower nozzle assembly is printed to water-cooling air-cooling integral type based on closed-loop control which characterized in that: comprises a spray head seat (1), a spray head component, a water cooling system, an air cooling system and a control device (13); the center of the two ends of the spray head seat (1) is respectively provided with a material hole (101) and an air hole (102) which penetrate through the upper surface and the lower surface of the spray head seat (1), a main cold channel (103) which is positioned in the upper part of the spray head seat (1) and has one end penetrating through the side surface of the spray head seat (1) is arranged between the material hole (101) and the air hole (102), and the upper part of the end surface of the spray head seat (1) close to the material hole (101) is provided with a water inlet (105) and a water outlet (104) which are respectively communicated to the vicinity of the two ends of the main cold; the spray head assembly comprises a throat pipe (6), a heating block (4) and a spray nozzle (5) which are sequentially and correspondingly connected, wherein a positioning pin (3) is fixed on the upper surface of the heating block (4), and the positioning pin (3) and the throat pipe (6) are respectively matched and inserted into a positioning hole (106) and a material hole (101) which are correspondingly arranged on the spray head seat (1); the water cooling system comprises a temperature measuring instrument (14), a cooling device (15) and a water pump (16) arranged at the inlet of the cooling device (15), the inlet of the water pump (16) and the outlet of the cooling device (15) are respectively and correspondingly connected with a water outlet (104) and a water inlet (105) of the spray head base (1) through water cooling hoses, and a temperature probe (10) of the temperature measuring instrument (14) is hermetically arranged at a through end of the main cooling channel (103); the air cooling system comprises an air pump (12), the outlet end of the air pump (12) is correspondingly connected with the upper end of an air hole (102) through a pneumatic hose, and a universal adjustable air cooling nozzle (2) is installed at the lower end of the air hole (102); the control device (13) is respectively in signal connection with the temperature measuring instrument (14), the cooling device (15), the water pump (16) and the air pump (12).
2. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: the spray head base (1) is provided with a limiting groove at the lower part of the end face close to the material hole (101), a limiting clamping plate (7) is movably inserted into the limiting groove, the inner end of the limiting clamping plate (7) is fixedly connected with the bottom of the limiting groove through a limiting spring (11), a movable through hole (701) with the diameter larger than the pipe diameter of the throat pipe (6) is formed in the middle plate surface of the limiting clamping plate (7), and a clamping hole (702) matched with the pipe wall of the corresponding throat pipe (6) in a clamping mode is communicated with the inner side of the movable through hole (701).
3. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 2, wherein: spring grooves which are matched with the two ends of the limiting spring (11) and fixed in an inserting mode are formed in the inner end face of the limiting clamping plate (7) and the bottom face of the limiting groove respectively.
4. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 2, wherein: the pipe wall of the throat pipe (6) is provided with a clamping groove which is matched with the edge of the clamping hole (702) and is clamped in.
5. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: the water inlet (105) and the water outlet (104) are respectively positioned at two sides of the throat (6) and are close to the throat (6).
6. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: and water-cooling joints (8) are arranged at the water inlet (105) and the water outlet (104).
7. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: and a pneumatic joint (9) is arranged at the upper end of the air hole (102).
8. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: the number of the positioning pins (3) is two, and the two positioning pins are respectively and correspondingly positioned on two sides of the throat pipe (6).
9. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: the cooling device (15) is an air-cooled cooler with a cooling fan.
10. The water-cooling and air-cooling integrated printing nozzle assembly based on the closed-loop control as claimed in claim 1, wherein: the air cooling nozzle (2) is a universal adjusting pipe with one end in threaded connection with the lower end of the air hole (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400364.0A CN112622271A (en) | 2020-12-04 | 2020-12-04 | Water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400364.0A CN112622271A (en) | 2020-12-04 | 2020-12-04 | Water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control |
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| Publication Number | Publication Date |
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| CN112622271A true CN112622271A (en) | 2021-04-09 |
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|---|---|---|---|
| CN202011400364.0A Pending CN112622271A (en) | 2020-12-04 | 2020-12-04 | Water-cooling and air-cooling integrated printing nozzle assembly based on closed-loop control |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114043720A (en) * | 2021-11-16 | 2022-02-15 | 深圳市洋明达科技有限公司 | Printing head of 3D printer |
| CN114347677A (en) * | 2021-12-24 | 2022-04-15 | 深圳弘美数码纺织技术有限公司 | Method and device for controlling temperature of spray head of printing trolley and printer |
| CN114870266A (en) * | 2022-06-10 | 2022-08-09 | 北京中成康富科技股份有限公司 | Millimeter wave treatment equipment convenient to adjust probe position |
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| CN211194935U (en) * | 2019-11-14 | 2020-08-07 | 玖科智造(武汉)科技股份有限公司 | 3D prints shower nozzle cooling device |
| CN111633986A (en) * | 2020-06-05 | 2020-09-08 | 中科院广州电子技术有限公司 | Switching mechanism capable of rapidly replacing 3D printing nozzle and 3D printer extrusion system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043720A (en) * | 2021-11-16 | 2022-02-15 | 深圳市洋明达科技有限公司 | Printing head of 3D printer |
| CN114347677A (en) * | 2021-12-24 | 2022-04-15 | 深圳弘美数码纺织技术有限公司 | Method and device for controlling temperature of spray head of printing trolley and printer |
| CN114870266A (en) * | 2022-06-10 | 2022-08-09 | 北京中成康富科技股份有限公司 | Millimeter wave treatment equipment convenient to adjust probe position |
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Application publication date: 20210409 |