CN210399583U - Evaporator capable of being spliced - Google Patents
Evaporator capable of being spliced Download PDFInfo
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- CN210399583U CN210399583U CN201920793279.1U CN201920793279U CN210399583U CN 210399583 U CN210399583 U CN 210399583U CN 201920793279 U CN201920793279 U CN 201920793279U CN 210399583 U CN210399583 U CN 210399583U
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- evaporator
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Abstract
The utility model discloses a splicing evaporator, which comprises a plurality of evaporator units, wherein each evaporator unit comprises a square plate spliced by heat-conducting section bars; the square plate is internally provided with a plurality of parallel branch pipelines through which refrigerants flow and a plurality of main pipelines vertically communicated with the branch pipelines; and the side surface of the square plate is provided with assembling holes which are assembled with other evaporator units in a splicing way. The utility model discloses simple structure is compact, easily installation combination, can make the ice surface of various areas with the arbitrary concatenation of a plurality of evaporimeter unit, has improved refrigeration efficiency, effective energy saving.
Description
Technical Field
The utility model relates to an evaporator, in particular to evaporator that can splice.
Background
At present, sports on ice are enjoyed by people, various competition projects have been developed, and skating is enjoyed by more and more people as a common entertainment mode. The 'thirteen-five' sports development plan made by the state mentions that the ice and snow sports project is popularized greatly during the 'thirteen-five' period, and the rapid development of the potential ice and snow fitness and leisure projects such as skating, ice hockey and snow is supported. Meanwhile, the country is being responsible for the establishment of the promotion of ice and snow on 3 hundred million people in relevant departments. The ice surface with consistent hardness and tidiness is made, and plays a vital role in safety and good technology of athletes.
An indirect refrigeration system is mostly adopted in the existing artificial ice rink, and due to the fact that an indirect refrigeration evaporator is adopted for heat exchange, the performance coefficient is reduced, the refrigeration efficiency is reduced, energy conservation and emission reduction are not facilitated, and meanwhile, a pipeline for circulating a cooling medium for exchanging heat with a refrigerant is added, so that the maintenance cost is increased; if the artificial ice rink adopts direct refrigeration, the heat exchange surface area of the evaporator is matched with the ice rink area, so that the evaporator with an oversized heat exchange surface is needed, the structure of the internal pipeline of the evaporator is complex, the manufacturing cost is greatly improved, and the size of the ice rink cannot be changed once the evaporator is manufactured.
Disclosure of Invention
The utility model provides a splicing evaporator with simple structure and low manufacturing and maintenance cost for solving the technical problems existing in the prior art.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a spliced evaporator comprises a plurality of evaporator units, wherein each evaporator unit comprises square plates spliced by heat-conducting sectional materials; the square plate is internally provided with a plurality of parallel branch pipelines through which refrigerants flow and a plurality of main pipelines vertically communicated with the branch pipelines; and the side surface of the square plate is provided with assembling holes which are assembled with other evaporator units in a splicing way.
Furthermore, each evaporator unit also comprises a unit refrigerant distributor, and the input ports of the branch pipelines are correspondingly communicated with the flow dividing output ports of the unit refrigerant distributors one by one; the output port of the branch pipeline is communicated with the main pipeline; the unit refrigerant distributor is located in the square plate.
Further, the branch pipelines are divided into A, B groups, the input ports of the branch pipelines of group A are positioned on the left side, the input ports of the branch pipelines of group B are positioned on the right side, and the branch pipelines of group A and the branch pipelines of group B are alternately arranged; the main pipelines are arranged left and right, the main pipeline on the left side is communicated with the branch pipeline of the group B, and the main pipeline on the right side is communicated with the branch pipeline of the group A; the unit refrigerant distributors are arranged on the left and right sides, the unit refrigerant distributors on the left side are communicated with the branch pipelines of the group A, and the unit refrigerant distributors on the right side are communicated with the branch pipelines of the group B.
Furthermore, each evaporator unit also comprises a flow dividing three-way valve and a flow converging three-way valve, and input ports of the unit refrigerant distributors on the left side and the right side are correspondingly communicated with two output ports of the flow dividing three-way valve; and the output ports of the main pipelines on the left side and the right side are correspondingly communicated with the two input ports of the confluence three-way valve.
Furthermore, the left side and the right side of the square plate are provided with frames with outer side faces closed, a plurality of strip-shaped sectional materials arranged side by side are arranged in the frames on the left side and the right side, the strip-shaped sectional materials are in heat conduction connection with the frames on the left side and the right side, the strip-shaped sectional materials are I-shaped sectional materials, and the branch pipelines are parallel to webs of the I-shaped sectional materials.
Furthermore, a hole for forming the branch pipeline is formed in the I-shaped section.
Furthermore, the branch pipeline is made of a heat conducting material pipe and is in heat conducting connection with a web plate and a wing plate of the I-shaped section.
Furthermore, the frames on the left side and the right side are formed by U-shaped profiles or square profiles; the branch pipeline is provided with a hole for forming the main pipeline, and a communication hole for communicating the branch pipeline and the main pipeline is arranged corresponding to the output port of the branch pipeline.
Furthermore, the frames on the left side and the right side are internally provided with a cavity; the dry pipeline is made of a heat conducting material pipe, is located in the cavity of the frame and is in heat conducting connection with the frame.
Further, the heat conduction section bar is an aluminum profile.
The utility model has the advantages and positive effects that: the evaporator unit adopts the square plate structure that heat conduction section bars such as the aluminium alloy by I shape and U type structure welded and form, the refrigerant pipeline sets up in square plate, but evaporator unit surface welding has 60 ~ 80 mm's bounding wall to be used for the manger plate to make ice, evaporator unit's frame side still is equipped with the hole of assembling with other evaporator unit equipment concatenations, two liang of evaporator unit accessible bolts etc. pass and assemble the pore pair and connect the location, in order to make into the ice-making area of arbitrary size. The refrigerant pipelines of each evaporator unit are uniform in flow through the unit refrigerant distributor, and ice surfaces with consistent hardness and tidiness can be formed. The utility model discloses simple structure is compact, easily installation combination, and the arbitrary concatenation of evaporimeter can make the ice surface of various areas, has improved refrigeration efficiency, effective energy saving.
Drawings
Fig. 1 is a schematic perspective view of an evaporator unit of the present invention;
FIG. 2 is a schematic diagram of a square plate structure in the evaporator unit of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
fig. 5 is a first structural schematic diagram of an i-shaped section and a branch pipe in the evaporator unit of the present invention;
fig. 6 is a second structural schematic view of an i-shaped section and a branch pipe in the evaporator unit of the present invention;
fig. 7 is a first structural schematic diagram of a U-shaped section and a dry pipe in an evaporator unit according to the present invention;
FIG. 8 is a second schematic view of the U-shaped section and the dry pipe in the evaporator unit of the present invention;
fig. 9 is a schematic view showing a flow direction of the refrigerant in the evaporator unit of the present invention.
In the figure: 1. a strip-shaped section bar; 2. enclosing plates; 3. a frame; 4. assembling holes; 5. a branch pipeline; 6. an I-shaped section bar; 7. a polyurethane foam layer; 8. a dry pipe; 9. a U-shaped section bar; 10. a communicating hole; 11. a unit refrigerant distributor; 12. a confluence three-way valve; 13. a shunt three-way valve; 14. and a flow dividing output pipe of the unit refrigerant distributor.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are listed and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 9, a spliceable evaporator includes a plurality of evaporator units, each evaporator unit includes a square plate spliced by heat-conducting section bars; the square plate is internally provided with a plurality of parallel branch pipelines 5 through which refrigerants flow and a plurality of main pipelines 8 vertically communicated with the branch pipelines 5; and the side surface of the square plate is provided with splicing holes 4 spliced and assembled with other evaporator units. The four edges of the upper surface of the square plate can be provided with surrounding plates 2, assembling holes 4 are arranged on the surrounding plates 2, bolts penetrate through the assembling holes 4 corresponding to the two square plates and are screwed down by nuts, and every two evaporator units are assembled together; or the assembling holes 4 can be arranged on two opposite side surfaces of the square plate, wherein one side surface is provided with the assembling holes; the other side surface is provided with a detachable protruding device such as a positioning pin and the like at a corresponding position, every two evaporator units are assembled, the protrusion of one evaporator unit is inserted into the assembling hole 4 of the other evaporator unit to complete assembling, and a locking mechanism for locking the protruding device, such as a bayonet lock and the like, can be arranged in the assembling hole 4.
The heat conducting section can be various heat conducting sections such as aluminum section, aluminum alloy section, copper alloy section, stainless steel section and the like.
Each evaporator unit also comprises a unit refrigerant distributor 11, and the input ports of the branch pipelines 5 can be correspondingly communicated with the flow dividing output ports of the unit refrigerant distributors 11 one by one; the output port of the branch pipeline 5 can be communicated with the main pipeline 8; the unit refrigerant distributor 11 may be located inside the square plate or outside the square plate, and the flow dividing output pipe 14 of the unit refrigerant distributor is preferably disposed inside the square plate. The refrigerant branch pipelines 5 of the evaporator unit have uniform flow through the unit refrigerant distributor 11, and can form ice surfaces with consistent hardness and tidiness.
The branch pipes 5 may be divided into A, B groups, the inlet of the branch pipe 5 of group A may be located on the left side, the inlet of the branch pipe 5 of group B may be located on the right side, the branch pipes 5 of group A and the branch pipes 5 of group B may be alternately arranged; the main pipelines 8 can be arranged left and right, the left main pipeline 8 can be communicated with the branch pipelines 5 of the group B, and the right main pipeline 8 can be communicated with the branch pipelines 5 of the group A; the unit refrigerant distributors 11 may be disposed left and right, the left unit refrigerant distributor 11 may be communicated with the branch pipes 5 of the group a, and the right unit refrigerant distributor 11 may be communicated with the branch pipes 5 of the group B. By adopting the structure, the refrigerants of the adjacent long-edge pipelines reversely flow, so that the heat exchange of the left side and the right side is synchronous and uniform, and the condition that the ice surface on one side is frozen fast and the ice surface on the other side is frozen slowly to cause uneven ice surface thickness when the refrigerants flow through the branch pipelines 5 in the same direction is avoided.
In order to simplify the pipeline and equalize the refrigerant flow, each evaporator unit can also comprise a flow dividing three-way valve 13 and a flow converging three-way valve 12, and the input ports of the unit refrigerant distributors 11 at the left side and the right side can be correspondingly communicated with two output ports of the flow dividing three-way valve 13; the output ports of the main pipe 8 on the left and right sides may be communicated with two input ports of the confluence three-way valve 12, respectively.
Furthermore, the left side and the right side of the square plate can be provided with frames 3 with closed outer side faces, the frames 3 on the left side and the right side can be internally provided with a plurality of strip-shaped sectional materials 1 arranged side by side, the strip-shaped sectional materials 1 can be in heat conduction connection with the frames 3 on the left side and the right side, the strip-shaped sectional materials 1 can be I-shaped sectional materials 6, and the branch pipelines 5 can be parallel to webs of the I-shaped sectional materials 6.
The evaporator unit is used for ice making in an ice rink, the upper surface of the spliced section bars is sealed, gaps among the section bars are as small as possible, and sealing strips, sealing glue and the like are additionally arranged on the gaps for sealing.
The branch pipelines 5 and the main pipelines 8 can be made of heat conducting materials such as aluminum pipes or copper pipes, and the branch pipelines 5 and the main pipelines 8 made of the heat conducting materials can be correspondingly welded on the inner surface of the heat conducting section; referring to fig. 5, the branch pipes 5 may be made of a pipe made of a heat conducting material, and may be connected to the web and the wing of the i-shaped section bar 6 in a heat conducting manner; referring to fig. 7, the dry pipe 8, which may be made of a heat conductive material, may be located in the cavity of the frame 3 and is in heat conductive connection with the frame 3.
Or directly selecting the section bar with the inner hole to form the pipeline to form the branch pipeline 5 and the main pipeline 8; for example, a heat-conducting i-shaped section bar 6 shown in fig. 6 is selected, and a hole for forming a branch pipeline 5 is formed in the center of a web plate at the position, close to an upper wing plate, of the cross section of the section bar; for example, a heat-conducting U-shaped section bar 9 shown in fig. 8 is selected, a hole for forming the main pipeline 8 is formed in the upper U-shaped groove wall, the hole for forming the main pipeline 8 is parallel to the groove bottom, a communication hole 10 for communicating the branch pipeline 5 and the main pipeline 8 is further formed in the upper U-shaped groove wall corresponding to the outlet of the branch pipeline 5, the communication hole 10 is perpendicular to the groove bottom, the hole at one end can be plugged, and the hole at the other end can be used as an inlet and an outlet.
The frames 3 on the left side and the right side can be formed by U-shaped profiles 9 or square profiles; a hole for forming the dry pipeline 8 can be formed in the main pipeline, and a communication hole 10 for communicating the branch pipeline 5 and the dry pipeline 8 can be formed corresponding to the output port of the branch pipeline 5.
A cavity can be arranged in the frame 3 at the left side and the right side; the dry pipe 8, which may be made of a heat conductive material pipe, may be located in the cavity of the frame 3 and be in heat conductive connection with the frame 3.
The branch pipeline 5 and the dry pipeline 8 are arranged close to the upper surface of the evaporator unit, so that direct heat exchange ice making is facilitated; and the lower surface of the evaporator unit is provided with a polyurethane foaming layer 7 with the thickness of 100mm, and the polyurethane foaming layer is used for heat insulation and heat preservation and preventing cold energy loss.
The following is a preferred embodiment of the present invention:
as shown in figure 1, the evaporator unit of the present invention adopts all aluminum section bars and other heat conducting section bars welded into square plates, and the basic size can be 4000mm × 3000mm × 100 mm. The I-shaped aluminum profiles of rectangular shape are spliced together side by side, then U-shaped aluminum profiles are welded at two ends of the I-shaped aluminum profiles to form square plates, the enclosing plates 2 are welded at the edges of the upper surfaces of the square plates, the height of each enclosing plate 2 is 60-80 mm, a closed square groove is formed by the upper surfaces of the square plates, assembling holes 4 can be formed in the enclosing plates 2, a plurality of evaporator units can pass through the assembling holes 4 through bolts and the like to be positioned, butted and assembled to form an ice making area with any size, and the whole periphery is tensioned and fixed by two to three steel cables after being assembled.
As shown in fig. 2 to 8, a branch pipeline 5 through which a refrigerant flows is welded in the direction of a web plate in an i-shaped aluminum section, and a main pipeline 8 vertically communicated with the branch pipeline 5 is arranged in a U-shaped groove of U-shaped aluminum sections at two ends; the branch pipelines 5 and the dry pipelines 8 are close to the upper surface of the square plate. Referring to fig. 5 and 7, the branch pipes 5 and the main pipes 8 may be made of heat conductive material such as aluminum pipes or copper pipes, and the branch pipes 5 and the main pipes 8 made of the heat conductive material may be correspondingly welded in the i-shaped aluminum profiles and the U-shaped aluminum profiles; i-shaped aluminum profiles and U-shaped aluminum profiles with holes formed inside to form pipelines can be directly selected; for example, an i-shaped aluminum profile shown in fig. 6 is selected, a hole for forming the branch pipe 5 is formed in the center of a web plate of the cross section close to an upper wing plate, for example, a U-shaped aluminum profile shown in fig. 8 is selected, a hole for forming the main pipe 8 is formed in a U-shaped groove wall above the U-shaped aluminum profile, the hole for forming the main pipe 8 is parallel to the groove bottom, a communication hole 10 for communicating the branch pipe 5 and the main pipe 8 is further formed in an output port of the U-shaped groove wall above the U-shaped aluminum profile, corresponding to the branch pipe 5, and the communication hole.
The inner diameters and the thicknesses of the branch pipelines 5 and the main pipeline 8 are configured according to the requirements of the flow rate and the strength of the refrigerant.
The upper surfaces of the spliced I-shaped aluminum profiles and U-shaped aluminum profiles are sealed, gaps among the profiles are as small as possible, and sealing strips, sealants and the like are additionally arranged on the gaps for sealing.
As shown in fig. 9, each evaporator unit is further provided with two unit refrigerant distributors 11, a one-in-two-out flow dividing three-way valve 13 and a two-in-one-out flow merging three-way valve 12, and the flow dividing output pipes 14 of the unit refrigerant distributors are a plurality of capillary pipes.
The branch pipes 5 may be divided into A, B groups, the inlet of the branch pipe 5 of group a may be located on the left side, the inlet of the branch pipe 5 of group B may be located on the right side, the branch pipes 5 of group a and the branch pipes 5 of group B may be alternately arranged; the main pipelines 8 can be arranged left and right, the left main pipeline 8 can be communicated with the branch pipelines 5 of the group B, and the right main pipeline 8 can be communicated with the branch pipelines 5 of the group A; the unit refrigerant distributors 11 can be arranged left and right, the flow dividing output pipe 14 of the unit refrigerant distributor on the left side can be welded with the input ports at the left ends of the branch pipes 5 of the group A, and the flow dividing output pipe 14 of the unit refrigerant distributor on the right side can be welded with the input ports at the right ends of the branch pipes 5 of the group B.
The inlet of the shunt three-way valve 13 is connected with the refrigerant inlet port, and two outlets of the shunt three-way valve 13 are respectively and correspondingly connected with the inlets of the unit refrigerant distributors 11 on the left and right sides. Two inlets of the confluence three-way valve 12 are communicated with the left and right trunk lines 8, and an outlet of the confluence three-way valve 12 is connected with a refrigerant return port.
When a plurality of evaporator units are spliced to make ice, a previous-stage refrigerant distributor can be arranged, the inlet of the flow-dividing three-way valve 13 of each evaporator unit is communicated with a flow-dividing output pipe connected with the previous-stage refrigerant distributor, and the outlet of the flow-converging three-way valve 12 of each evaporator unit is connected with a refrigerant backflow main pipeline.
The utility model discloses a theory of operation:
the flow of the refrigerant after the evaporator units are spliced is that the flow is equally divided from the system pipeline through the upper-stage refrigerant distributor and then flows into the flow dividing three-way valve 13 of each evaporator unit along the flow dividing output pipe on the upper-stage refrigerant distributor. The refrigerant is equally divided into two groups to enter two unit refrigerant distributors 11 of each evaporator unit through a flow dividing three-way valve 13 of each evaporator unit, and after the refrigerant is equally divided into flow by the unit refrigerant distributors 11 on the left and right sides, the refrigerant enters A, B input ports of two groups of branch pipelines 5 along a flow dividing output pipe 14 of the unit refrigerant distributors, then flows through the A group of branch pipelines 5 from left to right, flows through the B group of branch pipelines 5 from right to left, and exchanges heat with water on the upper surface of the evaporator unit to freeze the water. The refrigerant after heat exchange enters the main pipelines 8 at the left side and the right side of each evaporator unit, and flows into the reflux main pipeline in a gathering way through the confluence three-way valves 12 with two inlets and one outlet respectively, and flows into the system pipeline through the main outlet of the reflux main pipeline to continue the refrigeration cycle.
Referring to fig. 3 and 4, a polyurethane foam layer 7 with a thickness of 100mm is provided on the lower surface of the evaporator unit for heat insulation and heat preservation to prevent loss of cold energy.
To ensure good ice making, the evaporator unit may have an evaporating temperature of-10 deg.C and an overheating temperature of-7 deg.C to ensure that the ice surface is at-5 deg.C or other desired temperature.
The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.
Claims (10)
1. The spliced evaporator is characterized by comprising a plurality of evaporator units, wherein each evaporator unit comprises a square plate spliced by heat-conducting sectional materials; the square plate is internally provided with a plurality of parallel branch pipelines through which refrigerants flow and a plurality of main pipelines vertically communicated with the branch pipelines; and the side surface of the square plate is provided with assembling holes which are assembled with other evaporator units in a splicing way.
2. The spliceable evaporator according to claim 1, wherein each evaporator unit further comprises a unit refrigerant distributor, and the input ports of the branch pipes are in one-to-one correspondence communication with the split flow output ports of the unit refrigerant distributors; the output port of the branch pipeline is communicated with the main pipeline; the unit refrigerant distributor is located in the square plate.
3. The spliceable evaporator of claim 2, wherein the branch pipes are divided into A, B groups, the inlet of the branch pipe of group a being on the left side, the inlet of the branch pipe of group B being on the right side, the branch pipes of group a and the branch pipes of group B being arranged alternately; the main pipelines are arranged left and right, the main pipeline on the left side is communicated with the branch pipeline of the group B, and the main pipeline on the right side is communicated with the branch pipeline of the group A; the unit refrigerant distributors are arranged on the left and right sides, the unit refrigerant distributors on the left side are communicated with the branch pipelines of the group A, and the unit refrigerant distributors on the right side are communicated with the branch pipelines of the group B.
4. The spliceable evaporator according to claim 3, wherein each evaporator unit further comprises a flow-splitting three-way valve and a flow-merging three-way valve, and input ports of the unit refrigerant distributors on the left and right sides are correspondingly communicated with two output ports of the flow-splitting three-way valve; and the output ports of the main pipelines on the left side and the right side are correspondingly communicated with the two input ports of the confluence three-way valve.
5. The evaporator as claimed in any one of claims 1 to 4, wherein said square plate has a frame with a closed outer side surface at left and right sides, a plurality of strip-shaped sections are disposed in said frame at left and right sides, said strip-shaped sections are connected with said frame at left and right sides in a heat-conducting manner, said strip-shaped sections are I-shaped sections, and said branch pipe is parallel to a web of said I-shaped section.
6. The evaporator as recited in claim 5, wherein said I-shaped section has a hole formed therein for forming said branch pipe.
7. The spliceable evaporator according to claim 5, wherein said branch pipes are made of a pipe of heat conducting material, and are connected to the web and the wing of said I-shaped section in a heat conducting manner.
8. The evaporator as claimed in claim 5, wherein the left and right side frames are made of U-shaped or square-shaped profiles; the branch pipeline is provided with a hole for forming the main pipeline, and a communication hole for communicating the branch pipeline and the main pipeline is arranged corresponding to the output port of the branch pipeline.
9. The evaporator as claimed in claim 5, wherein a cavity is provided in the side frame on the left and right sides; the dry pipeline is made of a heat conducting material pipe, is located in the cavity of the frame and is in heat conducting connection with the frame.
10. The spliceable evaporator of claim 1, wherein the heat conducting profile is an aluminum profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793279.1U CN210399583U (en) | 2019-05-29 | 2019-05-29 | Evaporator capable of being spliced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793279.1U CN210399583U (en) | 2019-05-29 | 2019-05-29 | Evaporator capable of being spliced |
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| Publication Number | Publication Date |
|---|---|
| CN210399583U true CN210399583U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920793279.1U Expired - Fee Related CN210399583U (en) | 2019-05-29 | 2019-05-29 | Evaporator capable of being spliced |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160285A (en) * | 2019-05-29 | 2019-08-23 | 天津大学 | A kind of sliceable evaporator |
-
2019
- 2019-05-29 CN CN201920793279.1U patent/CN210399583U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160285A (en) * | 2019-05-29 | 2019-08-23 | 天津大学 | A kind of sliceable evaporator |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Pai Inventor after: Ma Yitai Inventor after: Zhang Qichao Inventor after: Ma Xiaofeng Inventor after: Li Minxia Inventor after: Zhan Haomiao Inventor after: Tang Yinglun Inventor after: Cai Siqi Inventor before: Ma Yitai Inventor before: Wang Pai Inventor before: Zhang Qichao Inventor before: Ma Xiaofeng Inventor before: Li Minxia Inventor before: Zhan Haomiao Inventor before: Tang Yinglun Inventor before: Cai Siqi |
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| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200424 Termination date: 20210529 |
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| CF01 | Termination of patent right due to non-payment of annual fee |