CN222072549U - Distributed photovoltaic grid-connected cabinet - Google Patents
Distributed photovoltaic grid-connected cabinet Download PDFInfo
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- CN222072549U CN222072549U CN202323608751.5U CN202323608751U CN222072549U CN 222072549 U CN222072549 U CN 222072549U CN 202323608751 U CN202323608751 U CN 202323608751U CN 222072549 U CN222072549 U CN 222072549U
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- cabinet body
- cabinet
- distributed photovoltaic
- photovoltaic grid
- temperature sensor
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- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 230000017525 heat dissipation Effects 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 25
- 230000006978 adaptation Effects 0.000 description 11
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
本实用新型公开了电器柜领域的一种分布式光伏并网柜，包括柜体，所述柜体的底部四角固定连接有支撑柱，所述柜体的前端左侧铰接有转动门，所述转动门的前端右侧固定连接有握把；散热机构，所述柜体的后端中间安装有散热机构，所述柜体的内壁左右两侧安置温度感应控制机构，所述柜体中间插设有两组隔板，两组所述隔板的左右两侧安置有部件安装调节机构，通过散热机构，便于有效对柜体内部进行散热，通过温度感应控制机构，便于对柜体内部温度进行检测，且能够控制散热机构开关，通过部件安装调节机构，便于根据体积对电器进行高度和位置调节进行安装。
The utility model discloses a distributed photovoltaic grid-connected cabinet in the field of electrical cabinets, comprising a cabinet body, wherein the four bottom corners of the cabinet body are fixedly connected with support columns, a rotating door is hingedly connected to the left side of the front end of the cabinet body, and a handle is fixedly connected to the right side of the front end of the rotating door; a heat dissipation mechanism, wherein the heat dissipation mechanism is installed in the middle of the rear end of the cabinet body, a temperature sensing control mechanism is arranged on the left and right sides of the inner wall of the cabinet body, two groups of partitions are inserted in the middle of the cabinet body, and component installation and adjustment mechanisms are arranged on the left and right sides of the two groups of partitions. Through the heat dissipation mechanism, it is convenient to effectively dissipate the heat inside the cabinet body, through the temperature sensing control mechanism, it is convenient to detect the temperature inside the cabinet body, and the switch of the heat dissipation mechanism can be controlled, and through the component installation and adjustment mechanism, it is convenient to adjust the height and position of the electrical appliance according to the volume for installation.
Description
Technical Field
The utility model relates to the field of electrical cabinets, in particular to a distributed photovoltaic grid-connected cabinet.
Background
The photovoltaic grid-connected cabinet is used as a general outlet of a photovoltaic power station and exists in a photovoltaic system and is a power distribution device for connecting the photovoltaic power station and a power grid, and the photovoltaic grid-connected cabinet is mainly used as a demarcation point of the photovoltaic power generation system and the power grid. For a low-voltage grid-connected photovoltaic power station, metering, protecting and other functions can be additionally arranged in the photovoltaic grid-connected cabinet.
The novel distributed photovoltaic grid-connected cabinet with the public number of CN217607249U comprises a cabinet body and a plurality of equipment parts, wherein the cabinet body is provided with a cabinet door, the cabinet body is respectively provided with an air inlet pipe and an air vent, the air inlet pipe is provided with a fan, and the air inlet pipe is provided with a protective net; the cabinet is characterized in that a plate groove is fixedly connected in the cabinet body, the plate groove is distributed longitudinally and transversely to divide the equipment part into a plurality of areas, a longitudinal baffle and a transverse baffle are inserted in the plate groove, and leakage openings are formed in the longitudinal baffle and the transverse baffle. When the intelligent cabinet temperature control device is used, the cabinet body is divided into a plurality of compartments through the longitudinal baffle plates and the transverse baffle plates, so that the flow direction of air flow is limited, the air flow formed by the fans passes through equipment parts of all the compartments, the heat dissipation effect of the whole equipment parts is improved, the problem that the heat dissipation is difficult to be carried out due to the fact that part of the equipment parts are relatively deviated in installation position is solved, but the device is not provided with a negative pressure fan in the use process, the air circulation is difficult to be carried out on the interior of the cabinet body, the heat dissipation effect is limited in the use process, the device is not provided with a temperature sensing control mechanism, the interior temperature is difficult to be monitored in real time, the heat dissipation mechanism is started according to the temperature reduction in the interior of the cabinet body, the long-term transportation of the fans is avoided, the service life of the fans is influenced, the resource waste is caused, the installation of the parts are not provided, the installation adjusting mechanism is difficult to be carried out according to the volume, and the parts are easy to be disturbed in installation according to the installation position when the electric parts are installed, and the use is influenced, so that the use of the device is influenced.
Disclosure of utility model
This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.
Therefore, the utility model aims to provide a distributed photovoltaic grid-connected cabinet, which can solve the problems that the prior device has limited heat dissipation effect and is difficult to control a heat dissipation mechanism to be opened or closed according to the temperature in the cabinet body, thereby influencing the service life of the heat dissipation mechanism and causing resource waste. In order to solve the technical problems, the utility model provides a distributed photovoltaic grid-connected cabinet, which adopts the following technical scheme: a distributed photovoltaic grid-connected cabinet comprises a cabinet body,
The cabinet body, the bottom four corners fixedly connected with support column of the cabinet body, the front end left side of the cabinet body articulates there is the revolving door, the front end right side fixedly connected with handle of revolving door;
The heat dissipation mechanism is arranged in the middle of the rear end of the cabinet body, the temperature sensing control mechanisms are arranged on the left side and the right side of the inner wall of the cabinet body, two groups of partition boards are inserted in the middle of the cabinet body, and the part installation adjusting mechanisms are arranged on the left side and the right side of the partition boards.
Through adopting above-mentioned technical scheme, through being provided with cooling mechanism, be convenient for effectively dispel the heat to the cabinet is inside, through being provided with temperature-sensing control mechanism, be convenient for detect cabinet internal temperature, and can control cooling mechanism switch, through being provided with part installation adjustment mechanism, be convenient for carry out altitude and position adjustment to the electrical apparatus according to the volume and install.
Optionally, a plurality of groups of heat dissipation holes are uniformly formed in the left side and the right side of the cabinet body, a chute matched with the partition board is formed in the cabinet body, and the cabinet body and the partition board form a sliding connection mechanism.
Through adopting above-mentioned technical scheme, evenly offered multiunit louvre through the left and right sides of the cabinet body, be convenient for dispel the heat to the internal portion of cabinet, constitute sliding connection mechanism through the cabinet body and baffle, be convenient for the baffle can dismantle, be convenient for install electrical components.
Optionally, the cooling mechanism includes the radiator fan of installing in the middle of cabinet body rear end, radiator fan's surface has cup jointed the block cover, and the block cover seted up the mounting groove with radiator fan looks adaptation, the left and right sides fixedly connected with connecting block of block cover, fixing bolt has been inserted in the centre of connecting block, install negative pressure fan in the middle of the front end of revolving door.
Through adopting above-mentioned technical scheme, through radiator fan and negative pressure fan, can form air current circulation system when convenient to use, get up indoor air circulation to improve ventilation efficiency and cooling effect, through being provided with block cover and fixing bolt, when radiator fan damages, can take out radiator fan fast, maintain inside, improved the life of this device.
Optionally, the surface of fixing bolt is connected with the screw thread, connecting block and the cabinet body set up the screw thread groove with screw thread looks adaptation, fixing bolt and connecting block and cabinet body constitute rotation coupling mechanism.
Through adopting above-mentioned technical scheme, constitute rotation coupling mechanism through fixing bolt and connecting block and cabinet body, be convenient for can dismantle radiator fan fast to maintain or change it, improved this device life.
Optionally, the temperature sensing control mechanism includes the temperature sensor of settling in cabinet body inner chamber left and right sides, temperature sensor's upper surface installs temperature sensor, the upper surface of cabinet body installs the controller.
Through adopting above-mentioned technical scheme, carry out real-time supervision through being provided with temperature-sensing ware to cabinet internal temperature, after the temperature surpasses the setting value, give temperature sensor with temperature transmission, give the controller with signal transmission through temperature sensor, open through controller control cooling mechanism, open cooling mechanism under the radiating circumstances of needs, after the temperature falls to suitable number of degrees, close cooling mechanism through the controller, avoid opening cooling mechanism for a long time, influence cooling mechanism life, and cause the waste of resource.
Optionally, the temperature sensor is connected with a temperature sensor wire, and the temperature sensor is connected with a controller wire.
Through adopting above-mentioned technical scheme, through temperature sensor and temperature-sensing ware wire connection, in the temperature sensor is given to the temperature transmission of being convenient for with the monitoring, through temperature sensor and controller wire connection, when being convenient for the high temperature, gives the controller with signal transmission to control cooling mechanism.
Optionally, the component mounting adjustment mechanism includes the bottom plate of inserting and establishing on the baffle, the spout with bottom plate looks adaptation has been seted up to the baffle, sliding connection mechanism is constituteed with the bottom plate to the baffle, the upper surface fixedly connected with of bottom plate adjusts the post, the mounting panel has been cup jointed at the top of adjusting the post, and the mounting panel four corners has been seted up the mounting hole, the centre of mounting panel has been inserted and has been had the locking bolt.
Through adopting above-mentioned technical scheme, constitute sliding connection mechanism through being provided with baffle and bottom plate, be convenient for part installation adjustment mechanism can carry out position adjustment on the baffle, through being provided with adjusting column and mounting panel, be convenient for in the use, highly adjust it according to electrical apparatus part, and make separate between two sets of electrical apparatus parts, be convenient for dispel the heat, through being provided with locking bolt, be convenient for lock it after highly adjusting.
Optionally, annular slider is fixedly connected with bottom the mounting panel, the spout with annular slider looks adaptation is seted up to the adjusting column, the mounting panel constitutes slip joint coupling mechanism with the adjusting column, and the locking bolt surface connection has the screw thread, the mounting panel is seted up the screw thread groove with screw thread looks adaptation, the locking bolt constitutes rotation coupling mechanism with the mounting panel.
Through adopting above-mentioned technical scheme, through adjusting the spout that the post offered with annular slider looks adaptation, this device of being convenient for can carry out altitude mixture control, constitute rotation coupling mechanism through locking bolt and mounting panel, be convenient for after the altitude mixture control, screw up the locking bolt to lock it.
In summary, the present utility model includes at least one of the following beneficial effects:
According to the application, the radiating mechanism is arranged, the radiating fan and the negative pressure fan are used for forming an airflow circulation system when the device is convenient to use, and indoor air is circulated, so that the ventilation efficiency and the cooling effect are improved, and the clamping sleeve and the fixing bolt are arranged, so that when the radiating fan is damaged, the radiating fan can be quickly taken out, the interior is maintained, and the service life of the device is prolonged;
Through being provided with temperature sensing control mechanism, carry out real-time supervision through temperature-sensing ware to cabinet internal temperature, after the temperature surpasses the setting value, give temperature sensor with temperature transmission, give the controller with signal transmission through temperature sensor, open through controller control cooling mechanism, open cooling mechanism under the radiating circumstances of needs, after the temperature falls to suitable number of degrees, close cooling mechanism through the controller, avoid opening cooling mechanism for a long time, influence cooling mechanism life, and cause the waste of resource.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a use state of the present utility model;
FIG. 2 is a second schematic diagram of the present utility model in use;
FIG. 3 is a schematic diagram of a heat dissipation mechanism according to the present utility model;
FIG. 4 is a schematic diagram of a temperature sensing control mechanism according to the present utility model;
fig. 5 is a schematic view of the component mounting adjustment mechanism of the present utility model.
Reference numerals illustrate: 1. a cabinet body; 2. a support column; 3. a rotating door; 4. a grip; 5. a heat dissipation mechanism; 501. a heat radiation fan; 502. a clamping sleeve; 503. a connecting block; 504. a fixing bolt; 505. a negative pressure fan; 6. a temperature sensing control mechanism; 601. a temperature sensor; 602. a temperature sensor; 603. a controller; 7. a partition plate; 8. a component mounting adjustment mechanism; 801. a bottom plate; 802. an adjusting column; 803. a mounting plate; 804. and (5) locking the bolt.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-5.
Embodiment 1, referring to fig. 1, 2 and 5, the present utility model discloses a distributed photovoltaic grid-connected cabinet, which can solve the problem of installation and adjustment of electrical components by the distributed photovoltaic grid-connected cabinet, including,
The cabinet body 1, four corners of the bottom of the cabinet body 1 are fixedly connected with support columns 2, the left side of the front end of the cabinet body 1 is hinged with a rotary door 3, and the right side of the front end of the rotary door 3 is fixedly connected with a handle 4;
The heat dissipation mechanism 5, install the heat dissipation mechanism 5 in the middle of the rear end of the cabinet body 1, temperature-sensing control mechanism 6 is settled to the inner wall left and right sides of the cabinet body 1, two sets of baffles 7 have been inserted in the middle of the cabinet body 1, the part installation adjustment mechanism 8 has been settled to the left and right sides of two sets of baffles 7, the multiunit louvre has evenly been seted up to the left and right sides of the cabinet body 1, the spout with baffle 7 looks adaptation has been seted up to the cabinet body 1, sliding connection mechanism is constituteed with baffle 7 to the baffle 1, the spout with the bottom plate 801 looks adaptation has been seted up to the baffle 7, sliding connection mechanism is constituteed with bottom plate 801 to baffle 7, the upper surface fixedly connected with adjusting post 802 of bottom plate 801, the mounting plate 803 has been cup jointed at the top of adjusting post 802, and the mounting plate 803 has been seted up the mounting hole, the centre of mounting plate 803 has been inserted locking bolt 804, annular slider has been seted up with the spout with annular slider looks adaptation to the adjusting post 802, the mounting plate 803 constitutes sliding connection mechanism with the locking bolt surface connection screw thread, the thread 803 has been seted up with screw thread groove 803.
Working principle: the cabinet body 1, be convenient for the part is installed, the support column 2, be convenient for bearing and provide highly, the revolving door 3, be convenient for close cabinet body 1, the cooling mechanism 5, be convenient for effectively dispel the heat to cabinet body 1 inside, temperature-sensing control mechanism 6, be convenient for detect cabinet body 1 inside temperature, and can control cooling mechanism 5 switch, baffle 7, be convenient for separate cabinet body 1 inside, component mounting adjustment mechanism 8, be convenient for install electric apparatus according to volume high and position control, during the use, after installing the mounting panel 803 with electric apparatus part, set up the mounting hole through mounting panel 803, after admitting it, carry out highly regulated back with adjusting column 802 according to electric apparatus part's volume size, screw up locking bolt 804, make mounting panel 803 lock with adjusting column 802 after inserting baffle 7 in baffle 7, insert into baffle 7 with bottom plate 801, adjust its position as required can.
Embodiment 2, refer to fig. 3 and fig. 4, the problem that this device opens or closes the cooling mechanism according to the internal temperature of cabinet and dispels the heat is solved in this embodiment, this distributed photovoltaic grid-connected cabinet still includes cooling mechanism 5 including installing the radiator fan 501 in the middle of cabinet 1 rear end, the surface of radiator fan 501 has cup jointed block cover 502, and block cover 502 has seted up the mounting groove with radiator fan 501 looks adaptation, block cover 502's left and right sides fixedly connected with connecting block 503, fixing bolt 504 has been inserted in the centre of connecting block 503, install negative pressure fan 505 in the middle of the front end of revolving door 3, the surface connection of fixing bolt 504 has the screw thread, connecting block 503 and cabinet 1 have seted up the screw thread groove with screw thread looks adaptation, fixing bolt 504 and connecting block 503 and cabinet 1 constitute rotation coupling mechanism, temperature-sensing control mechanism 6 includes the temperature sensor 601 of settling in cabinet 1 inner chamber left and right sides, temperature sensor 601's upper surface installs temperature-sensing ware 602, cabinet 1's upper surface mounting has controller 603, temperature sensor 601 and temperature sensor 601 connects with temperature sensor 602, electric wire connection 603 and electric wire controller 603.
Working principle: when electrical components installs the back, open temperature sensor 602, carry out real-time supervision through temperature sensor 602 to cabinet body 1 inside temperature, after the temperature surpasses the setting value, give temperature sensor 601 with temperature transmission, give controller 603 with signal transmission through temperature sensor 601, open negative pressure fan 505 and radiator fan 501 through controller 603 control, can form air current circulation system when convenient to use, get up indoor air circulation, thereby ventilation efficiency and cooling effect are improved, open radiator mechanism 5 under the radiating circumstances of needs, after the temperature falls to suitable number of degrees, close negative pressure fan 505 and radiator fan 501 through controller 603, avoid opening negative pressure fan 505 and radiator fan 501 for a long time, influence negative pressure fan 505 and radiator fan 501 life, and cause the waste of resource, after radiator fan 501 damages, unscrew fixing bolt 504, after dismantling clamping sleeve 502, be convenient for take out radiator fan 501, maintain inside, the life of this device has been improved.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The utility model provides a distributed photovoltaic grid-connected cabinet which characterized in that: comprising the steps of (a) a step of,
The novel multifunctional cabinet comprises a cabinet body (1), wherein support columns (2) are fixedly connected to four corners of the bottom of the cabinet body (1), a rotary door (3) is hinged to the left side of the front end of the cabinet body (1), and a grip (4) is fixedly connected to the right side of the front end of the rotary door (3);
The heat dissipation mechanism (5), install heat dissipation mechanism (5) in the middle of the rear end of the cabinet body (1), temperature-sensing control mechanism (6) are settled to the inner wall left and right sides of the cabinet body (1), insert in the middle of the cabinet body (1) and be equipped with two sets of baffles (7), two sets of the left and right sides of baffle (7) is settled there is part installation adjustment mechanism (8).
2. A distributed photovoltaic grid-tie cabinet according to claim 1, characterized in that: the novel intelligent cabinet is characterized in that a plurality of groups of heat dissipation holes are uniformly formed in the left side and the right side of the cabinet body (1), sliding grooves matched with the partition plates (7) are formed in the cabinet body (1), and the cabinet body (1) and the partition plates (7) form a sliding connection mechanism.
3. A distributed photovoltaic grid-tie cabinet according to claim 1, characterized in that: the cooling mechanism (5) comprises a cooling fan (501) arranged in the middle of the rear end of the cabinet body (1), a clamping sleeve (502) is sleeved on the outer surface of the cooling fan (501), a mounting groove matched with the cooling fan (501) is formed in the clamping sleeve (502), connecting blocks (503) are fixedly connected to the left side and the right side of the clamping sleeve (502), fixing bolts (504) are inserted in the middle of the connecting blocks (503), and a negative pressure fan (505) is arranged in the middle of the front end of the rotating door (3).
4. A distributed photovoltaic grid-tie cabinet according to claim 3, characterized in that: the surface of the fixing bolt (504) is connected with threads, the connecting block (503) and the cabinet body (1) are provided with thread grooves matched with the threads, and the fixing bolt (504), the connecting block (503) and the cabinet body (1) form a rotary connecting mechanism.
5. A distributed photovoltaic grid-tie cabinet according to claim 1, characterized in that: the temperature sensing control mechanism (6) comprises temperature sensors (601) arranged on the left side and the right side of an inner cavity of the cabinet body (1), a temperature sensor (602) is arranged on the upper surface of the temperature sensor (601), and a controller (603) is arranged on the upper surface of the cabinet body (1).
6. The distributed photovoltaic grid-connected cabinet of claim 5, wherein: the temperature sensor (601) is connected with a temperature sensor (602) through wires, and the temperature sensor (601) is connected with a controller (603) through wires.
7. A distributed photovoltaic grid-tie cabinet according to claim 1, characterized in that: the component mounting adjusting mechanism (8) comprises a bottom plate (801) inserted on a partition plate (7), a chute matched with the bottom plate (801) is formed in the partition plate (7), the partition plate (7) and the bottom plate (801) form a sliding connection mechanism, an adjusting column (802) is fixedly connected with the upper surface of the bottom plate (801), a mounting plate (803) is sleeved at the top of the adjusting column (802), mounting holes are formed in four corners of the mounting plate (803), and a locking bolt (804) is inserted in the middle of the mounting plate (803).
8. The distributed photovoltaic grid-tie cabinet of claim 7, wherein: the device is characterized in that an annular sliding block is fixedly connected to the bottom of the mounting plate (803), a sliding groove matched with the annular sliding block is formed in the adjusting column (802), a sliding clamping connection mechanism is formed by the mounting plate (803) and the adjusting column (802), threads are connected to the surface of the locking bolt (804), a thread groove matched with the threads is formed in the mounting plate (803), and a rotation connection mechanism is formed by the locking bolt (804) and the mounting plate (803).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323608751.5U CN222072549U (en) | 2023-12-28 | 2023-12-28 | Distributed photovoltaic grid-connected cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323608751.5U CN222072549U (en) | 2023-12-28 | 2023-12-28 | Distributed photovoltaic grid-connected cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222072549U true CN222072549U (en) | 2024-11-26 |
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ID=93555324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323608751.5U Active CN222072549U (en) | 2023-12-28 | 2023-12-28 | Distributed photovoltaic grid-connected cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222072549U (en) |
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2023
- 2023-12-28 CN CN202323608751.5U patent/CN222072549U/en active Active
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