CN216530983U - Heat dissipation device for motor - Google Patents

Heat dissipation device for motor Download PDF

Info

Publication number
CN216530983U
CN216530983U CN202122281450.0U CN202122281450U CN216530983U CN 216530983 U CN216530983 U CN 216530983U CN 202122281450 U CN202122281450 U CN 202122281450U CN 216530983 U CN216530983 U CN 216530983U
Authority
CN
China
Prior art keywords
casing
heat dissipation
water
pipe
fixedly installed
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.)
Expired - Fee Related
Application number
CN202122281450.0U
Other languages
Chinese (zh)
Inventor
高秀忠
高鑫
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.)
Weihai Aokun Motor Co ltd
Original Assignee
Weihai Aokun Motor 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 Weihai Aokun Motor Co ltd filed Critical Weihai Aokun Motor Co ltd
Priority to CN202122281450.0U priority Critical patent/CN216530983U/en
Application granted granted Critical
Publication of CN216530983U publication Critical patent/CN216530983U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

本实用新型公开了一种电机用散热装置,包括外壳,所述外壳的底部固定暗爪那个有固定板,所述外壳的内部设置有多个散热扇,所述外壳的内侧固定安装有多个固定栓,所述固定栓的内侧固定连接有内框,所述内框的内侧固定安装有多个散热片,所述散热片的内部贯穿设置有通水管,所述通水管的内侧固定安装有防尘网;本实用通过将防尘网设置在内侧,并且将防尘网与通水管固定,能够在保证散热效果的情况下,避免温度堆积在内部,导致换热用的通水管无法进行换热的情况,此外通过设置的呈平面螺旋状结构的通水管以及呈分散设置的散热片结构,能够提供更好的散热结构,散热效果更好。

Figure 202122281450

The utility model discloses a heat dissipation device for a motor, which comprises a casing, the bottom of the casing is provided with a fixing plate for fixing the dark claw, a plurality of cooling fans are arranged inside the casing, and a plurality of cooling fans are fixedly installed on the inner side of the casing. A fixing bolt, the inner side of the fixing bolt is fixedly connected with an inner frame, the inner side of the inner frame is fixedly installed with a plurality of radiating fins, the interior of the radiating fins is provided with a water passage, and the inner side of the water passage is fixedly installed with Dust-proof net; In this utility, by arranging the dust-proof net on the inner side and fixing the dust-proof net and the water pipe, the temperature can be prevented from accumulating in the interior under the condition of ensuring the heat dissipation effect, so that the water pipe for heat exchange cannot be replaced. In addition, the water pipes in a plane spiral structure and the heat dissipation fin structure in a dispersed configuration can provide a better heat dissipation structure and a better heat dissipation effect.

Figure 202122281450

Description

一种电机用散热装置A heat sink for a motor

技术领域technical field

本实用新型涉及电机散热领域,具体为一种电机用散热装置。The utility model relates to the field of motor heat dissipation, in particular to a heat dissipation device for a motor.

背景技术Background technique

柴油发电机是一种小型发电设备,系指以柴油等为燃料,以柴油机为原动机带动发电机发电的动力机械。整套机组一般由柴油机、发电机、控制箱、燃油箱、起动和控制用蓄电瓶、保护装置、应急柜等部件组成。Diesel generator is a small power generation equipment, which refers to a power machine that uses diesel as fuel and uses diesel engine as prime mover to drive the generator to generate electricity. The whole set is generally composed of diesel engine, generator, control box, fuel tank, battery for starting and control, protection device, emergency cabinet and other components.

柴油发电机自身结构通常会配备冷却系统,现有的冷却系统为弯管状的换热结构,此种结构在进行散热时,其防尘网设置在管道的外侧,长期使用时,防尘网表面容易堵塞,使得散热效果降低,导致内部换热弯管无法进行换热,进而导致冷却系统无法工作,因此通常需要进行经常清理,并且现有的结构散热时容易出现散热效果过强或者过弱的情况,存在一定的使用问题。The structure of the diesel generator itself is usually equipped with a cooling system. The existing cooling system is an elbow-shaped heat exchange structure. When this structure is dissipating heat, the dustproof net is set on the outside of the pipe. When used for a long time, the dustproof net The surface is easily blocked, which reduces the heat dissipation effect, resulting in the inability of the internal heat exchange elbow to exchange heat, which in turn causes the cooling system to fail to work. Therefore, frequent cleaning is usually required, and the heat dissipation effect of the existing structure is prone to be too strong or too weak. There are certain usage problems.

实用新型内容Utility model content

本实用新型的目的在于提供一种电机用散热装置,以解决现有散热结构的散热效果容易出现过热或者过强的问题。The purpose of the present invention is to provide a heat dissipation device for a motor, so as to solve the problem that the heat dissipation effect of the existing heat dissipation structure is prone to overheating or excessive strength.

为实现上述目的,本实用新型提供如下技术方案:一种电机用散热装置,包括外壳,所述外壳的底部固定暗爪那个有固定板,所述外壳的内部设置有多个散热扇,所述外壳的内侧固定安装有多个固定栓,所述固定栓的内侧固定连接有内框,所述内框的内侧固定安装有多个散热片,所述散热片的内部贯穿设置有通水管,所述通水管的内侧固定安装有防尘网。In order to achieve the above purpose, the present invention provides the following technical solutions: a heat dissipation device for a motor, comprising a casing, the bottom of the casing has a fixing plate for fixing the dark claw, a plurality of cooling fans are arranged inside the casing, the A plurality of fixing bolts are fixedly installed on the inner side of the casing, an inner frame is fixedly connected to the inner side of the fixing bolts, and a plurality of radiating fins are fixedly installed on the inner side of the inner frame. A dust-proof net is fixedly installed on the inner side of the water-passing pipe.

优选的,所述通水管的一端设置有进水管,所述通水管的另一端设置有出水管,所述进水管与出水管分别设置于外壳的两侧。Preferably, one end of the water passage pipe is provided with a water inlet pipe, and the other end of the water passage pipe is provided with a water outlet pipe, and the water inlet pipe and the water outlet pipe are respectively arranged on both sides of the casing.

优选的,所述散热片的表面开设有贯穿的连接孔,所述散热片靠近外壳内部的一侧表面固定安装有支撑板,所述散热片的材质为铝制材料,所述支撑板的材质为隔热材料。Preferably, a connecting hole is formed on the surface of the heat sink, a support plate is fixedly installed on the surface of the heat sink close to the inside of the casing, the material of the heat sink is aluminum, and the material of the support plate is made of aluminum. for thermal insulation.

优选的,所述支撑板与内框固定安装,所述固定栓为筒状栓管,所述固定栓的内部设置有贯穿的螺栓,所述螺栓与内框固定连接。Preferably, the support plate is fixedly installed with the inner frame, the fixing bolt is a cylindrical bolt tube, the inside of the fixing bolt is provided with a penetrating bolt, and the bolt is fixedly connected with the inner frame.

优选的,所述外壳的内部还设置有挡板,所述挡板与内框均为矩形框架结构,所述挡板与内框紧紧贴合。Preferably, a baffle plate is further provided inside the casing, the baffle plate and the inner frame are both rectangular frame structures, and the baffle plate and the inner frame are tightly fitted.

优选的,所述通水管呈平面的螺旋状结构,所述通水管的多层螺旋结构之间均连通,所述进水管与出水管均与通水管连通。Preferably, the water conduit is in a plane helical structure, the multi-layered helical structures of the water conduit are all connected, and the water inlet pipe and the water outlet are both communicated with the water conduit.

与现有技术相比,本实用新型的有益效果是:Compared with the prior art, the beneficial effects of the present utility model are:

通过将防尘网设置在内侧,并且将防尘网与通水管固定,能够在保证散热效果的情况下,避免温度堆积在内部,导致换热用的通水管无法进行换热的情况,此外通过设置的呈平面螺旋状结构的通水管以及呈分散设置的散热片结构,能够提供更好的散热结构,散热效果更好,且能够保证散热温度的稳定,不会出现过热和过冷的情况,并且结构方便进行拆卸,在长期使用出现损坏或者需要检修时,拆卸方式更加轻松,具备一定的有益效果,对比现有的结构来说使用更加方便。By arranging the dust-proof net inside and fixing the dust-proof net and the water pipe, it is possible to prevent the temperature from accumulating in the interior while ensuring the heat dissipation effect, so that the water pipe for heat exchange cannot perform heat exchange. The water pipes with a plane spiral structure and the heat sink structure arranged in a dispersed manner can provide a better heat dissipation structure, better heat dissipation effect, and can ensure the stability of the heat dissipation temperature, and there will be no overheating and overcooling. In addition, the structure is convenient for disassembly, and when damage occurs in long-term use or needs to be repaired, the disassembly method is easier, which has certain beneficial effects, and is more convenient to use compared with the existing structure.

附图说明Description of drawings

图1为本实用新型的正视图;Fig. 1 is the front view of the utility model;

图2为本实用新型的侧视图;Fig. 2 is the side view of the utility model;

图3为本实用新型散热管的结构示意图;Fig. 3 is the structural schematic diagram of the cooling pipe of the present invention;

图4为本实用新型拆下散热管后的正视图;Fig. 4 is the front view of the utility model after removing the cooling pipe;

图5为本实用新型散热片的侧视图。FIG. 5 is a side view of the heat sink of the present invention.

图中:10、外壳;11、固定栓;12、固定板;13-挡板;20、内框;21、散热片;211、连接孔;212、支撑板;22、出水管;23、进水管;24、通水管;25、防尘网;26、散热扇。In the figure: 10, outer shell; 11, fixing bolt; 12, fixing plate; 13 - baffle plate; 20, inner frame; 21, heat sink; 211, connecting hole; 212, support plate; 22, water outlet pipe; 23, inlet Water pipe; 24, water pipe; 25, dust filter; 26, cooling fan.

具体实施方式Detailed ways

下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

请参阅图1-5,一种电机用散热装置,包括外壳10,外壳10的底部固定暗爪那个有固定板12,外壳10的内部设置有多个散热扇26。Referring to FIGS. 1-5 , a heat dissipation device for a motor includes a casing 10 , a fixing plate 12 is provided at the bottom of the casing 10 for fixing the dark claw, and a plurality of cooling fans 26 are arranged inside the casing 10 .

其中,外壳10的内侧固定安装有多个固定栓11,固定栓11的内侧固定连接有内框20,内框20的内侧固定安装有多个散热片21,散热片21的内部贯穿设置有通水管24,通水管24的内侧固定安装有防尘网25,通过固定栓11将内框20进行固定,散热片21与通水管24形成圆状的换热结构,防尘网25设置在内部,提供对散热扇26的防尘保护。A plurality of fixing bolts 11 are fixedly installed on the inner side of the outer casing 10 , an inner frame 20 is fixedly connected to the inner side of the fixing bolts 11 , and a plurality of heat sinks 21 are fixedly installed on the inner side of the inner frame 20 . The water pipe 24, the inner side of the water pipe 24 is fixedly installed with a dustproof net 25, the inner frame 20 is fixed by the fixing bolt 11, the heat sink 21 and the water pipe 24 form a circular heat exchange structure, and the dustproof net 25 is arranged inside, Provides dust protection for the cooling fan 26 .

其中,通水管24的一端设置有进水管23,通水管24的另一端设置有出水管22,进水管23与出水管22分别设置于外壳10的两侧,通水管24的多层螺旋结构之间均连通,进水管23与出水管22均与通水管24连通,能够通过进水管23进水,出水管22出水,加装泵体后即可形成循环的水冷结构,可对发电机进行散热。One end of the water pipe 24 is provided with a water inlet pipe 23, and the other end of the water pipe 24 is provided with a water outlet pipe 22. The water inlet pipe 23 and the water outlet pipe 22 are respectively arranged on both sides of the casing 10. The multi-layer spiral structure of the water pipe 24 The water inlet pipe 23 and the water outlet pipe 22 are both connected with the water passage pipe 24, the water can be fed through the water inlet pipe 23, and the water can be discharged from the water outlet pipe 22. After the pump body is installed, a circulating water cooling structure can be formed, which can dissipate heat to the generator. .

其中,通水管24呈平面的螺旋状结构,散热片21的表面开设有贯穿的连接孔211,散热片21靠近外壳10内部的一侧表面固定安装有支撑板212,散热片21的材质为铝制材料,支撑板212的材质为隔热材料,通过贯穿的方式将散热片21固定在通水管24的外侧,加装散热片21后,由于呈圆形分布,越靠近中心部位散热片21贴合越密集,散热时,会导致其内部的散热较弱,外部的散热方式较快,因此在实际散热时,会保证较为温和的散热效果,不会出现散热效果过高的情况,能够保证较为稳定的散热效果。The water pipe 24 has a flat spiral structure, the surface of the heat sink 21 is provided with a connecting hole 211 therethrough, and a support plate 212 is fixedly installed on the surface of the heat sink 21 close to the inside of the casing 10. The material of the heat sink 21 is aluminum The material of the support plate 212 is a heat insulating material, and the heat sink 21 is fixed on the outside of the water pipe 24 by means of penetration. The denser the heat dissipation, the weaker the internal heat dissipation and the faster the external heat dissipation. Therefore, in the actual heat dissipation, a relatively mild heat dissipation effect will be guaranteed, and the heat dissipation effect will not be too high. Stable cooling effect.

其中,支撑板212与内框20固定安装,固定栓11为筒状栓管,固定栓11的内部设置有贯穿的螺栓,螺栓与内框20固定连接,支撑板212用于提供对散热片21的支撑,避免在使用过程中,散热片21出现损坏。The support plate 212 is fixedly installed with the inner frame 20 , the fixing bolt 11 is a cylindrical bolt tube, the interior of the fixing bolt 11 is provided with a bolt passing through, and the bolt is fixedly connected with the inner frame 20 , and the supporting plate 212 is used to provide the cooling fins 21 . support to avoid damage to the heat sink 21 during use.

其中,外壳10的内部还设置有挡板13,挡板13与内框20均为矩形框架结构,挡板13与内框20紧紧贴合,提供对散热扇26出风位置的限制,保证散热扇26吹的风均能够吹到散热片21与通水管24上。The baffle plate 13 is also provided inside the outer casing 10. The baffle plate 13 and the inner frame 20 are both rectangular frame structures. The wind blown by the cooling fan 26 can be blown onto the cooling fins 21 and the water pipes 24 .

工作原理:在进行使用时,首先在进水管23连接水泵和冷却水箱,然后将两侧的管道分别与发电机的进水口和出水口连接,需要将出水管22对应的管道与发电机的进水口连接,使用时,通过水泵进行循环的水流动力输出,散热则通过散热扇26进行吹风散热,由于散热片21与通水管24呈平面的圆形设置,因此使得靠近中心部位的通水管24能够通风的缝隙较少,而外部的通水管24则能够吹到更多的风,外部散热更好,在实际散热时,可在外部进行高强度的散热,内部则保证温度不会升高,保证稳定的散热效果,避免出现过热或者过冷的情况,散热效果更加稳定。Working principle: When using, first connect the water pump and the cooling water tank to the water inlet pipe 23, and then connect the pipes on both sides to the water inlet and outlet of the generator respectively. The water outlet is connected. When in use, the circulating water flow is output by the water pump, and the heat dissipation is carried out by the cooling fan 26. Since the cooling fins 21 and the water pipe 24 are arranged in a plane circle, the water pipe 24 near the center can be There are fewer ventilation gaps, and the external water pipe 24 can blow more wind, and the external heat dissipation is better. In actual heat dissipation, high-intensity heat dissipation can be carried out externally, and the internal temperature will not rise to ensure that Stable heat dissipation effect avoids overheating or overcooling, and the heat dissipation effect is more stable.

需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

尽管已经示出和描述了本实用新型的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1.一种电机用散热装置,包括外壳(10),所述外壳(10)的底部固定暗爪那个有固定板(12),所述外壳(10)的内部设置有多个散热扇(26),所述外壳(10)的内侧固定安装有多个固定栓(11),其特征在于:所述固定栓(11)的内侧固定连接有内框(20),所述内框(20)的内侧固定安装有多个散热片(21),所述散热片(21)的内部贯穿设置有通水管(24),所述通水管(24)的内侧固定安装有防尘网(25)。1. A heat dissipation device for a motor, comprising a casing (10), the bottom of the casing (10) is provided with a fixing plate (12) for fixing the dark claw, and a plurality of cooling fans (26) are provided inside the casing (10). ), a plurality of fixing bolts (11) are fixedly installed on the inner side of the casing (10), and it is characterized in that: the inner side of the fixing bolts (11) is fixedly connected with an inner frame (20), and the inner frame (20) A plurality of cooling fins (21) are fixedly installed on the inner side of the cooling fins (21), and a water passage (24) is arranged through the inside of the cooling fins (21), and a dustproof net (25) is fixedly installed on the inner side of the water passage (24). 2.根据权利要求1所述的一种电机用散热装置,其特征在于:所述通水管(24)的一端设置有进水管(23),所述通水管(24)的另一端设置有出水管(22),所述进水管(23)与出水管(22)分别设置于外壳(10)的两侧。2. A heat sink for a motor according to claim 1, characterized in that: one end of the water passage pipe (24) is provided with a water inlet pipe (23), and the other end of the water passage pipe (24) is provided with an outlet pipe (24). A water pipe (22), the water inlet pipe (23) and the water outlet pipe (22) are respectively arranged on both sides of the casing (10). 3.根据权利要求1所述的一种电机用散热装置,其特征在于:所述散热片(21)的表面开设有贯穿的连接孔(211),所述散热片(21)靠近外壳(10)内部的一侧表面固定安装有支撑板(212),所述散热片(21)的材质为铝制材料,所述支撑板(212)的材质为隔热材料。3. A heat dissipation device for a motor according to claim 1, characterized in that: the surface of the heat sink (21) is provided with a connecting hole (211) through, and the heat sink (21) is close to the casing (10). A support plate (212) is fixedly installed on one surface of the interior of the ), the material of the heat sink (21) is an aluminum material, and the material of the support plate (212) is a heat insulating material. 4.根据权利要求3所述的一种电机用散热装置,其特征在于:所述支撑板(212)与内框(20)固定安装,所述固定栓(11)为筒状栓管,所述固定栓(11)的内部设置有贯穿的螺栓,所述螺栓与内框(20)固定连接。4 . The heat sink for a motor according to claim 3 , wherein the support plate ( 212 ) is fixedly installed with the inner frame ( 20 ), and the fixing bolt ( 11 ) is a cylindrical bolt pipe, so the The inside of the fixing bolt (11) is provided with a penetrating bolt, and the bolt is fixedly connected with the inner frame (20). 5.根据权利要求1所述的一种电机用散热装置,其特征在于:所述外壳(10)的内部还设置有挡板(13),所述挡板(13)与内框(20)均为矩形框架结构,所述挡板(13)与内框(20)紧紧贴合。5 . The heat sink for a motor according to claim 1 , wherein a baffle plate ( 13 ) is further provided inside the casing ( 10 ), and the baffle plate ( 13 ) is connected to the inner frame ( 20 ). 6 . Both are of rectangular frame structure, and the baffle plate (13) is tightly attached to the inner frame (20). 6.根据权利要求2所述的一种电机用散热装置,其特征在于:所述通水管(24)呈平面的螺旋状结构,所述通水管(24)的多层螺旋结构之间均连通,所述进水管(23)与出水管(22)均与通水管(24)连通。6 . The heat dissipation device for a motor according to claim 2 , wherein the water passage ( 24 ) is in a plane helical structure, and the multi-layered helical structures of the water passage ( 24 ) are all connected to each other. 7 . The water inlet pipe (23) and the water outlet pipe (22) are both communicated with the water passage pipe (24).
CN202122281450.0U 2021-09-22 2021-09-22 Heat dissipation device for motor Expired - Fee Related CN216530983U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122281450.0U CN216530983U (en) 2021-09-22 2021-09-22 Heat dissipation device for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122281450.0U CN216530983U (en) 2021-09-22 2021-09-22 Heat dissipation device for motor

Publications (1)

Publication Number Publication Date
CN216530983U true CN216530983U (en) 2022-05-13

Family

ID=81521345

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122281450.0U Expired - Fee Related CN216530983U (en) 2021-09-22 2021-09-22 Heat dissipation device for motor

Country Status (1)

Country Link
CN (1) CN216530983U (en)

Similar Documents

Publication Publication Date Title
CN111431349B (en) Pumped storage generator with double water-cooling cross type cooling equipment
CN207992931U (en) A kind of computer efficient radiating apparatus
CN116387739A (en) A cooling device for new energy electrochemical energy storage equipment
CN106225209A (en) A kind of air conditioner heat radiator being convenient to clean changing
CN216530983U (en) Heat dissipation device for motor
CN203872034U (en) Novel water-cooled frequency inverter
CN109637989B (en) A parallel pipeline liquid cooling radiator for high-power IGBT heat dissipation
CN216044035U (en) Natural gas generator set with cooling device
CN112737195B (en) Cooling device of motor
CN219918581U (en) A heat dissipation structure and a generator set
CN207261103U (en) Energy-efficient automobile radiator
CN207460718U (en) A kind of electrical engineering radiator
CN102427284B (en) Wind-driven generator
CN116428138A (en) Wind turbine integrated heat exchange nacelle cover and wind turbine cooling system
CN109195428A (en) Radiator is electrically efficiently concentrated in a kind of underground
CN212898810U (en) Casing structure of wind driven generator
CN214577334U (en) Cooling device of diesel engine
CN210895318U (en) High-efficient heat radiation structure for radiator
CN210835956U (en) Water cooling mechanism for CPU
CN208040510U (en) engine cooling device
CN222668865U (en) A detachable wind turbine gearbox cooling device
CN219536661U (en) Second harmonic current suppression device
CN221957862U (en) Insulating housing assembly of variable-frequency circulating fan
CN216751388U (en) Heat dissipation dust keeper for generator
CN217603002U (en) Heat dissipation protective housing for centrifugal pump

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20220513

CF01 Termination of patent right due to non-payment of annual fee