CN218328459U - Quick clear air-cooler - Google Patents

Quick clear air-cooler Download PDF

Info

Publication number
CN218328459U
CN218328459U CN202222481819.7U CN202222481819U CN218328459U CN 218328459 U CN218328459 U CN 218328459U CN 202222481819 U CN202222481819 U CN 202222481819U CN 218328459 U CN218328459 U CN 218328459U
Authority
CN
China
Prior art keywords
heat exchange
exchange tube
air
scraper
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202222481819.7U
Other languages
Chinese (zh)
Inventor
李峰子
陈必如
甄梦想
张冠兰
刘长雨
凌宇翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongke Meiling Cryogenics Co Ltd
Original Assignee
Zhongke Meiling Cryogenics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhongke Meiling Cryogenics Co Ltd filed Critical Zhongke Meiling Cryogenics Co Ltd
Priority to CN202222481819.7U priority Critical patent/CN218328459U/en
Application granted granted Critical
Publication of CN218328459U publication Critical patent/CN218328459U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The utility model relates to a refrigeration plant technical field particularly, relates to a quick clear air-cooler. Including casing and heat exchange tube mechanism, the air intake has been seted up to the leading flank of casing, and the air outlet has been seted up to the trailing flank of casing, and heat exchange tube mechanism includes heat exchange tube structure and scraper blade structure, and heat exchange tube structure sets up in the casing, and is used for carrying out the heat exchange with the air, scraper blade structure sliding connection in heat exchange tube structure. The drive scraper blade structure moves on the heat exchange tube structure, can get rid of the dust on heat exchange tube structure surface, need not dismantle the air-cooler in order to wash the heat exchange tube structure, is favorable to reducing the dismantlement number of times of air-cooler to the fault rate of air-cooler has been reduced. Meanwhile, the scraper structure is utilized to clean dust on the surface of the heat exchange tube structure, so that a larger contact area between the heat exchange tube structure and air can be ensured, the heat exchange efficiency of the heat exchange tube structure is favorably improved, and the refrigeration effect of the air cooler is ensured.

Description

Quick clear air-cooler
Technical Field
The utility model relates to a refrigeration plant technical field particularly, relates to a quick clear air-cooler.
Background
The air cooler has the action principle that air enters the air cooler from an air inlet grid on the front side of the air cooler and is discharged from an air outlet grid on the rear side of the air cooler, wherein the air needs to pass through a heat exchange tube in the process of flowing from the air inlet grid to the air outlet grid, and the heat in the air is absorbed by the heat exchange tube.
In long-time use, can accumulate a large amount of dusts on the heat exchange tube, because the heat exchange tube is difficult to dismantle the washing, the dust of accumulation can lead to the air-cooler to break down. Meanwhile, the accumulated dust can reduce the contact area between air and the heat exchange tube and reduce the heat exchange efficiency of the heat exchange tube, thereby reducing the refrigeration effect of the air cooler.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem how to clear up the heat exchange tube of air-cooler.
In order to solve the problem, the utility model provides a quick clear air-cooler, including casing and heat exchange tube mechanism, the air inlet grid has been seted up to the leading flank of casing, the air-out grid has been seted up to the trailing flank of casing, heat exchange tube mechanism includes heat exchange tube structure and scraper blade structure, the heat exchange tube structure sets up in the casing, and be used for carrying out the heat exchange with the air, scraper blade structure sliding connection in heat exchange tube structure.
The technical effects of the utility model: the scraper structure is arranged on the heat exchange tube structure, when the scraper structure moves on the heat exchange tube structure, dust on the surface of the heat exchange tube structure can be removed, meanwhile, air flows from the air inlet grid to the air outlet grid, and the dust can be discharged out of the shell in the air flowing process. From this, the drive scraper blade structure moves on heat exchange tube structure, can get rid of the dust on heat exchange tube structure surface, need not dismantle the air-cooler in order to wash the heat exchange tube structure, is favorable to reducing the dismantlement number of times of air-cooler to the fault rate of air-cooler has been reduced. Meanwhile, the scraper structure is utilized to clean dust on the surface of the heat exchange tube structure, so that a larger contact area between the heat exchange tube structure and air can be ensured, the heat exchange efficiency of the heat exchange tube structure is favorably improved, and the refrigeration effect of the air cooler is ensured.
Optionally, the scraper structure includes scraper blade body and stopper, scraper blade body sliding connection in the heat exchange tube structure, the stopper sets up on the scraper blade body, the spout has been seted up to the inner wall of casing, the spout sets up to the rectangular shape along the left and right sides direction, stopper sliding connection in the spout.
Optionally, the structural stopper of scraper blade is provided with two, two the stopper sets up respectively the rear side lower extreme of scraper blade body with the front side upper end of scraper blade body, the spout is provided with two, two the spout sets up respectively casing front side inner wall upper end with casing rear side inner wall lower extreme, two the stopper corresponds the setting in two the spout.
Optionally, the heat exchange tube structure includes first heat exchange tube and second heat exchange tube, first heat exchange tube with the second heat exchange tube is along vertical direction dislocation distribution, set up the inlet on the first heat exchange tube for input refrigerant, set up the liquid outlet on the second heat exchange tube for input refrigerant, first heat exchange tube with the second heat exchange tube intercommunication, scraper blade body sliding connection in first heat exchange tube with the second heat exchange tube.
Optionally, a through hole is formed in the scraper body relative to the heat exchange tube structure, and the scraper structure further comprises a brush, wherein the brush is arranged on the hole wall of the through hole.
Optionally, the scraper blade bodies are provided with two, and the two scraper blade bodies are connected to the heat exchange tube structure in a sliding manner.
Optionally, the scraper structure further comprises a handle disposed at a rear side of the scraper body.
Optionally, the scraper structure further comprises a spring, the spring is located between the scraper body and the inner wall of the casing, one end of the spring is connected with the scraper body, and the other end of the spring is connected with the inner wall of the casing.
Optionally, quick clear air-cooler still includes the fan, the fan sets up the inside of casing, and be close to one side of air-out bars.
Optionally, quick clear air-cooler still includes the guide plate, the guide plate sets up the rear side of fan, and is used for guiding the air to going out the air grid and flowing.
Drawings
Fig. 1 is a schematic structural view of the front side of the quick cleaning air cooler of the present invention;
fig. 2 is a schematic rear side structural view of the quick cleaning air cooler of the present invention;
fig. 3 is a schematic structural diagram of the heat exchange tube mechanism of the present invention;
fig. 4 is a schematic structural view of the scraper of the present invention.
Reference numerals:
1. a housing; 11. an air inlet grid; 12. an air outlet grid; 2. a heat exchange tube structure; 21. a first heat exchange tube; 22. a second heat exchange tube; 23. a first communication pipe; 24. a second communicating pipe; 3. a scraper structure; 31. a squeegee body; 311. a through hole; 32. a limiting block; 33. a brush; 34. a handle; 4. a deflector.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
In the present embodiment, an XYZ-axis coordinate system is established, in which the X-axis forward direction is the front, the X-axis reverse direction is the back, the Y-axis forward direction is the right, the Y-axis reverse direction is the left, the Z-axis forward direction is the top, and the Z-axis reverse direction is the bottom.
In order to solve the above problems, as shown in fig. 1 to 3, the air cooler capable of being cleaned quickly according to the embodiment includes a casing 1 and a heat exchange tube mechanism, an air inlet grill 11 is disposed on a front side surface of the casing 1, an air outlet grill 12 is disposed on a rear side surface of the casing 1, the heat exchange tube mechanism includes a heat exchange tube structure 2 and a scraper structure 3, the heat exchange tube structure 2 is disposed in the casing 1 and is used for exchanging heat with air, an axial direction of the heat exchange tube structure 2 faces a left-right direction, and the scraper structure 3 is slidably connected to the heat exchange tube structure 2 along the axial direction of the heat exchange tube structure 2.
In the embodiment, for example, a quick cleaning air cooler is placed indoors, the heat exchange tube structure 2 and the scraper blade structure 3 are both arranged in the casing 1, indoor air flows into the casing 1 from the air inlet grill 11 on the front side surface of the casing 1, when the air passes through the heat exchange tube structure 2, the heat exchange tube structure 2 exchanges heat with the air to absorb heat in the air, and the air is converted into cold air and then flows out from the air outlet grill 12 on the rear side surface of the casing 1, so that the indoor temperature is reduced. Meanwhile, the axial direction of the heat exchange tube structure 2 faces the left-right direction, and the scraper structure 3 is slidably connected to the heat exchange tube structure 2 along the axial direction of the heat exchange tube structure 2. The driving scraper structure 3 moves along the axial direction of the heat exchange tube structure 2, and dust on the surface of the heat exchange tube structure 2 can be removed in the moving process of the scraper structure 3.
In summary, the scraper structure 3 is arranged on the heat exchange tube structure 2, when the scraper structure 3 moves on the heat exchange tube structure 2, dust on the surface of the heat exchange tube structure 2 can be removed, meanwhile, air flows from the air inlet grid 11 to the air outlet grid 12, and the dust can be discharged out of the shell 1 in the air flowing process. From this, drive scraper blade structure 3 moves on heat exchange tube structure 2, can get rid of the dust on heat exchange tube structure 2 surface, need not dismantle the air-cooler in order to wash heat exchange tube structure 2, is favorable to reducing the dismantlement number of times of air-cooler to the fault rate of air-cooler has been reduced. Meanwhile, the scraper structure 3 is used for cleaning dust on the surface of the heat exchange tube structure 2, so that a large contact area between the heat exchange tube structure 2 and air can be ensured, the heat exchange efficiency of the heat exchange tube structure 2 is favorably improved, and the refrigeration effect of an air cooler is ensured.
Optionally, as shown in fig. 4, the scraper structure 3 includes a scraper body 31 and a limiting block 32, the scraper body 31 is slidably connected to the heat exchange tube structure 2, the limiting block 32 is disposed on the scraper body 31, the inner wall of the casing 1 is provided with a sliding groove, the sliding groove is disposed in a long strip shape along the left-right direction, and the limiting block 32 is slidably connected to the sliding groove.
In this embodiment, when the driving scraper body 31 moves on the heat exchange tube structure 2, the limiting block 32 can be driven to move in the chute synchronously, because the chute is arranged in a strip shape along the left-right direction, and the limiting block 32 is connected to the chute in a sliding manner, then the limiting block 32 only moves along the left-right direction, and the limiting block 32 is arranged on the scraper body 31, so that the moving direction of the scraper body 31 can be limited, namely, the scraper body 31 is ensured to be only round along the left-right direction. Thereby, the stability of the movement of the scraper body 31 on the heat exchange tube structure 2 can be ensured.
Optionally, the number of the limiting blocks 32 on the scraper structure 3 is two, the two limiting blocks 32 are respectively arranged at the rear lower end of the scraper body 31 and the front upper end of the scraper body 31, the number of the sliding grooves is two, the two sliding grooves are respectively arranged at the front inner wall upper end of the shell 1 and the rear inner wall lower end of the shell 1, and the two limiting blocks 32 are correspondingly arranged in the two sliding grooves.
In this embodiment, when the scraper body 31 is driven to move on the heat exchange tube structure 2, the limiting block 32 located at the lower end of the rear side of the scraper body 31 can be driven to move in the sliding groove at the lower end of the inner wall of the rear side of the casing 1, and the limiting block 32 located at the upper end of the front side of the scraper body 31 can be driven to move in the sliding groove at the upper end of the inner wall of the front side of the casing 1. From this, two stoppers 32 and two spouts can carry on spacingly to scraper blade body 31 front and back both sides respectively, can further guarantee the stability of scraper blade body 31 motion on heat exchange tube structure 2.
Optionally, as shown in fig. 3, the heat exchange tube structure 2 includes a first heat exchange tube 21 and a second heat exchange tube 22, the first heat exchange tube 21 and the second heat exchange tube 22 are distributed in a staggered manner along a vertical direction, a liquid inlet is formed in the first heat exchange tube 21 and used for inputting a refrigerant, a liquid outlet is formed in the second heat exchange tube 22 and used for inputting the refrigerant, the first heat exchange tube 21 is communicated with the second heat exchange tube 22, and the scraper body 31 is slidably connected to the first heat exchange tube 21 and the second heat exchange tube 22.
In this embodiment, exemplarily, the heat exchange tube structure 2 further includes a first communicating tube 23 and a second communicating tube 24, the first heat exchange tube 21 is located at the front side, the second heat exchange tube 22 is located at the rear side, meanwhile, the first heat exchange tube 21, the second heat exchange tube 22, the first communicating tube 23 and the second communicating tube 24 are provided in a plurality, and the plurality of first heat exchange tubes 21, the plurality of second heat exchange tubes 22, the plurality of first communicating tubes 23 and the plurality of second communicating tubes 24 are distributed at intervals along the vertical direction, the first communicating tube 23 communicates left ends of two adjacent first heat exchange tubes 21 and second heat exchange tubes 22, and the second communicating tube 24 communicates right ends of two adjacent first heat exchange tubes 21 and second heat exchange tubes 22. Meanwhile, the liquid inlet is disposed on a first heat exchange tube 21 at the upper end of the housing 1, and the liquid outlet is disposed on a second heat exchange tube 22 at the lower end of the housing 1. From this, first heat exchange tube 21 and second heat exchange tube 22 distribute along vertical direction dislocation, then first heat exchange tube 21 can not shelter from second heat exchange tube 22, and the air can carry out the heat exchange with first heat exchange tube 21, second heat exchange tube 22 in proper order, has promoted heat exchange tube structure 2's heat transfer effect.
Optionally, as shown in fig. 4, the scraper body 31 is provided with a through hole 311 opposite to the heat exchange tube structure 2, and the scraper structure 3 further includes a brush 33, where the brush 33 is disposed on a hole wall of the through hole 311.
In this embodiment, for example, through holes 311 are opened on the scraper body 31 opposite to the first heat exchange tube 21 and the second heat exchange tube 22, a brush 33 is disposed on a wall of each through hole 311, and each through hole 311 on the scraper body 31 is sequentially sleeved on an outer side wall of one of the first heat exchange tube 21 or one of the second heat exchange tubes 22. Therefore, when the scraper body 31 moves in the left-right direction, the brush 33 can be driven to move on the outer side walls of the first heat exchange tube 21 and the second heat exchange tube 22, and then the dust on the first heat exchange tube 21 and the second heat exchange tube 22 can be cleaned.
Optionally, two scraper bodies 31 are provided, and both scraper bodies 31 are slidably connected to the heat exchange tube structure 2.
In the embodiment, for example, the two scraper bodies 31 are sleeved on the first heat exchange tube 21 and the second heat exchange tube 22 at the same time, and the two scraper bodies 31 can be driven to move on the first heat exchange tube 21 and the second heat exchange tube 22 at the same time, so that dust on the surfaces of the first heat exchange tube 21 and the second heat exchange tube 22 can be cleaned quickly.
Optionally, as shown in fig. 2 and 4, the squeegee structure 3 further includes a handle 34, and the handle 34 is provided on the rear side of the squeegee body 31.
In this embodiment, exemplarily, one end of the handle 34 is connected to the scraper body 31, the other end passes through the front air opening and is located outside the casing 1, the front air grid 11 includes a plurality of horizontally arranged and vertically distributed strip-shaped plates, the handle 34 is located between two adjacent strip-shaped plates, on the one hand, the movement path of the handle 34 can be controlled, the stability of the movement of the scraper body 31 is ensured, and on the other hand, the handle 34 can be limited to prevent the handle 34 from being separated from the casing 1. Therefore, the handle 34 is arranged on the scraper structure 3, so that the scraper body 31 can be driven to move conveniently.
Optionally, the scraper structure 3 further comprises a spring, the spring is located between the scraper body 31 and the inner wall of the casing 1, one end of the spring is connected with the scraper body 31, and the other end of the spring is connected with the inner wall of the casing 1.
In this embodiment, the springs are disposed at the left and right ends of the chute, wherein one end of the spring at the left end of the chute is connected to the scraper body 31 at the left side of the casing 1, the other end of the spring is connected to the left side wall of the chute, one end of the spring at the right end of the chute is connected to the scraper body 31 at the right side of the casing 1, and the other end of the spring is connected to the right side wall of the chute. Therefore, in the initial state, the spring is contracted, the two scraper bodies 31 are respectively positioned at the left side and the right side of the shell 1, when the scraper bodies 31 are used, the handle 34 is applied with force to drive the scraper bodies 31 at the left side and the right side to move towards the middle of the shell 1, so that dust from the left side to the middle area of the first heat exchange tube 21 and the second heat exchange tube 22 is cleaned, dust from the right side to the middle area of the first heat exchange tube 21 and the second heat exchange tube 22 is cleaned, and the spring is extended in the process. After the first heat exchange tube 21 and the second heat exchange tube 22 are cleaned, the acting force applied to the handle 34 is removed, and the spring contracts and drives the two scraper blade bodies 31 to move towards the left side and the right side of the shell 1 respectively.
Optionally, the fast cleaning air cooler further comprises a fan disposed inside the housing 1 and near one side of the air outlet grill 12.
In this embodiment, the air turns into the cold air after passing through first heat exchange tube 21 and second heat exchange tube 22 in proper order, with the fan setting in casing 1 one side that is close to air-out bars 12, start the fan and can be fast with the cold air by air-out bars 12 discharge to accelerate the refrigeration speed of air-cooler.
Optionally, as shown in fig. 1, the air cooler for quick cleaning further includes a flow guide plate 4, and the flow guide plate 4 is disposed at the rear side of the fan and is used for guiding the air to flow toward the air outlet grill 12.
In the embodiment, the flow guide plate 4 is exemplarily provided in a horn-shaped structure, the flow guide plate 4 is provided on the fan, one end of the flow guide plate 4 is close to the second heat exchange tube 22, and the other end is communicated with the air outlet grill 12. The air turns into the cold air after passing through first heat exchange tube 21 and second heat exchange tube 22 in proper order, through setting up guide plate 4, can guide the cold air to go out the tuber grating 12 and flow, reduces the time that the cold air flows out casing 1 to accelerate the refrigeration speed of air-cooler.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a quick clear air-cooler, its characterized in that includes casing (1) and heat exchange tube mechanism, the leading flank of casing (1) is equipped with air inlet grid (11), the trailing flank of casing (1) is equipped with out wind grid (12), heat exchange tube mechanism includes heat exchange tube structure (2) and scraper blade structure (3), heat exchange tube structure (2) set up in casing (1), and be used for carrying out the heat exchange with the air, scraper blade structure (3) sliding connection in heat exchange tube structure (2).
2. The air cooler with rapid cleaning function according to claim 1, wherein the scraper structure (3) comprises a scraper body (31) and a limiting block (32), the scraper body (31) is slidably connected to the heat exchange tube structure (2), the limiting block (32) is arranged on the scraper body (31), a sliding groove is formed in the inner wall of the casing (1), the sliding groove is arranged in a long strip shape along the left-right direction, and the limiting block (32) is slidably connected to the sliding groove.
3. The air cooler with rapid cleaning function according to claim 2, wherein there are two stoppers (32) on the scraper structure (3), two stoppers (32) are respectively disposed at the lower end of the rear side of the scraper body (31) and the upper end of the front side of the scraper body (31), there are two sliding grooves, two sliding grooves are respectively disposed at the upper end of the inner wall of the front side of the casing (1) and the lower end of the inner wall of the rear side of the casing (1), and two stoppers (32) are correspondingly disposed in the two sliding grooves.
4. A rapid cleaning air cooler according to claim 3, wherein the heat exchange tube structure (2) comprises a first heat exchange tube (21) and a second heat exchange tube (22), the first heat exchange tube (21) and the second heat exchange tube (22) are arranged in a staggered manner along a vertical direction, a liquid inlet is formed in the first heat exchange tube (21) for inputting refrigerant, a liquid outlet is formed in the second heat exchange tube (22) for inputting refrigerant, the first heat exchange tube (21) is communicated with the second heat exchange tube (22), and the scraper body (31) is slidably connected to the first heat exchange tube (21) and the second heat exchange tube (22).
5. The quick-cleaning air cooler according to claim 4, characterized in that the scraper body (31) is provided with a through hole (311) relative to the heat exchange tube structure (2), and the scraper structure (3) further comprises a brush (33), wherein the brush (33) is arranged on the wall of the through hole (311).
6. A rapid-cleaning cold air blower according to claim 5, wherein there are two scraper bodies (31), both scraper bodies (31) being slidably connected to said heat exchanger tube structure (2).
7. Quick cleaning air-cooler according to claim 6, characterized in that the scraper structure (3) further comprises a handle (34), said handle (34) being arranged at the rear side of the scraper body (31).
8. Quick cleaning air-cooler according to claim 7, characterized in that the scraper structure (3) further comprises springs, which are located between the scraper body (31) and the inner wall of the casing (1), and which are connected to the scraper body (31) at one end and to the inner wall of the casing (1) at the other end.
9. Quick cleaning air cooler according to claim 8, characterized in that it also comprises a fan, which is arranged inside the housing (1) near one side of the air outlet grill (12).
10. Quick cleaning air cooler according to claim 9, characterized in that it further comprises a baffle (4), said baffle (4) being arranged on the rear side of said fan and being adapted to direct the air flow towards said air outlet grill (12).
CN202222481819.7U 2022-09-20 2022-09-20 Quick clear air-cooler Active CN218328459U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222481819.7U CN218328459U (en) 2022-09-20 2022-09-20 Quick clear air-cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222481819.7U CN218328459U (en) 2022-09-20 2022-09-20 Quick clear air-cooler

Publications (1)

Publication Number Publication Date
CN218328459U true CN218328459U (en) 2023-01-17

Family

ID=84836237

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222481819.7U Active CN218328459U (en) 2022-09-20 2022-09-20 Quick clear air-cooler

Country Status (1)

Country Link
CN (1) CN218328459U (en)

Similar Documents

Publication Publication Date Title
CN116412700B (en) Easy-to-clean shell-and-tube heat exchanger
CN218328459U (en) Quick clear air-cooler
CN207720606U (en) A kind of fin-inserted radiator being convenient to clean dust
CN201964808U (en) Online dust removal tube-box heat exchanger
CN116293989B (en) Industrial air cooler based on convection cooling principle
CN116576699A (en) Antiscaling heat exchanger
CN113758315B (en) Plate-fin heat exchanger for waste gas heat exchange
CN213208731U (en) Plate-fin oil cooler
CN214095733U (en) Continuous high-efficiency high-temperature gas condensation collector
CN115253501A (en) Laterite-nickel ore high-temperature flue gas bag-type dust removal equipment and method
CN114838436A (en) Heat recovery air conditioning system
CN211824030U (en) Heat exchanger with easily cleaned heat exchange fins
CN217560456U (en) Cleaning device for plate heat exchanger
CN219914109U (en) Heat energy recovery circulating water cooling equipment
CN220959715U (en) Plate type air cooler
CN217275802U (en) Big data machine all-in-one water-cooling heat dissipation equipment for case
CN219829583U (en) Heat exchanger for rectifying C5-C13 short-chain normal alkane
CN216790938U (en) Can clear up floating head heat exchanger
CN220147112U (en) Mounting bracket for condenser
CN221005246U (en) Condensing structure of air conditioner blower
CN219640718U (en) Heat pipe flue gas heat exchanger
CN108571914A (en) Finned heat exchanger system and method with cleaning function
CN215742177U (en) Modular drawer type filtering device
CN219829638U (en) Detachable and washable heat exchanger
CN220912083U (en) Flat-plate type heat pipe heat exchanger of communication machine room

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant