CN219529142U - Generating set - Google Patents
Generating set Download PDFInfo
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- CN219529142U CN219529142U CN202320345188.8U CN202320345188U CN219529142U CN 219529142 U CN219529142 U CN 219529142U CN 202320345188 U CN202320345188 U CN 202320345188U CN 219529142 U CN219529142 U CN 219529142U
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- air
- air inlet
- chamber
- engine
- partition plate
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model provides a generator set, which comprises an air inlet chamber, an air outlet chamber and a main body chamber, wherein the air inlet chamber is positioned between a first partition plate and a front air inlet plate, an air guide partition plate extending from top to bottom is arranged in the air inlet chamber, a controller is arranged below the air guide partition plate, the area, right against the air guide partition plate, in the air inlet chamber is an upper air inlet area, the area below the air guide partition plate is a lower air inlet area, the air guide partition plate divides the upper air inlet area into a first chamber and a second chamber which are communicated, and air inlet holes are formed in the air guide partition plate. The air outlet chamber is opposite to the air inlet chamber, the main body chamber is positioned between the air inlet chamber and the air outlet chamber, and the engine and the generator are both arranged in the main body chamber. According to the utility model, under the drive of the engine, external air enters the first chamber from the front air inlet plate, then enters the second chamber through the air inlet holes and the bottom of the air deflector, and then enters the generator set, so that the controller is cooled, and meanwhile, the noise during air inlet is reduced.
Description
Technical Field
The utility model relates to the technical field of generator sets, in particular to a generator set with heat dissipation and noise reduction functions.
Background
With the continuous improvement of the living standard of human beings, the requirements of the human beings on the environment are also continuously improved, and the silencing effect generated by the operation of the generator set in the standby power supply is higher.
Most of the generator sets in the current market usually sacrifice noise reduction performance in order to pursue efficient heat dissipation performance, and the problem that larger noise is generated in the working process of the generator sets exists, so that normal lives of users and other people are endangered.
Accordingly, there is a need for a generator set that overcomes the above-described drawbacks.
Disclosure of Invention
The utility model aims to provide a generator set.
According to one aspect of the present utility model, there is provided a generator set comprising an outer housing, an engine located in the outer housing and a generator connected to the engine, the outer housing comprising a front air inlet plate located on an air inlet side of the engine and a rear air outlet plate located on an air outlet side of the engine, a first partition being provided in the outer housing between the engine and the front air inlet plate, further comprising:
the air inlet chamber is positioned between the first partition plate and the front air inlet plate, an air guide partition plate extending from top to bottom is arranged in the air inlet chamber, a controller is arranged below the air guide partition plate, the area, right against the air guide partition plate, in the air inlet chamber is an upper air inlet area, the area below the air guide partition plate is a lower air inlet area, the air guide partition plate divides the upper air inlet area into a first cavity and a second cavity which are communicated, and air inlet holes are formed in the air guide partition plate;
the hot air in the generator set is discharged to the outside from the air outlet chamber, and the air outlet chamber is arranged opposite to the air inlet chamber;
the main body chamber is positioned between the air inlet chamber and the air outlet chamber, and the engine and the generator are both arranged in the main body chamber;
under the drive of the engine, external air enters the air inlet chamber from the front air inlet plate, one part of air enters the upper air inlet region, the other part of air enters the lower air inlet region, the air entering the upper air inlet region enters the second chamber from the first chamber through the air inlet hole, then enters the main body chamber, the air entering the lower air inlet region flows in from the lower part of the air guide partition plate, enters the main body chamber through the controller and dissipates heat and cools the controller.
Preferably, the air guide partition plate comprises a vertical part extending downwards from the top of the air inlet chamber and a bending part extending obliquely from the bottom end of the vertical part to the air inlet plate from top to bottom, and the controller is arranged below the bending part.
Preferably, the controller is obliquely arranged from top to bottom to one side where the front air inlet plate is located, and the controller is arranged in the middle of the lower portion of the bending part.
Preferably, the vertical part and the bending part are respectively provided with an air inlet, the air inlet is respectively arranged at two sides of the vertical part and two sides of the bending part, and air flows entering through the air inlet at two sides of the bending part are blown to gaps at two sides of the controller.
Preferably, the first partition plate is located between the air guide partition plate and the engine, an air guide cover is arranged between the engine and the first partition plate, a flywheel fan is arranged in the air guide cover, the generator is integrated in the flywheel fan, and the flywheel fan is connected with a crankshaft of the engine.
Preferably, the engine also comprises an air filter connected with the air inlet end of the engine, and the air filter is arranged above the air guide cover.
Preferably, the first partition plate is provided with a first ventilation opening for communicating the air guide cover with the air inlet chamber and a second ventilation opening for communicating the second chamber with the main body chamber, and the air filter is positioned in the second ventilation opening and is kept in a gap with the edge of the second ventilation opening.
Preferably, the engine comprises an axial flow fan which is positioned on one side of the air outlet chamber and is connected with a crankshaft of the engine, and the axial flow fan and the flywheel fan are respectively positioned at two ends of the crankshaft and synchronously rotate along with the rotation of the crankshaft.
Preferably, a second partition plate is arranged in the outer shell and between the engine and the rear air outlet plate, the air outlet chamber is arranged between the second partition plate and the rear air outlet plate, a third air outlet communicated with the air outlet chamber and the main body chamber is arranged on the second partition plate, and the axial flow fan and the third air outlet are correspondingly arranged.
Preferably, a muffler communicated with the exhaust end of the engine is arranged in the air outlet chamber, and the muffler is positioned above the axial flow fan.
Compared with the prior art, the generator set provided by the utility model has the following beneficial effects:
according to the generator set, under the drive of the engine, external air enters the first cavity from the front air inlet plate, then enters the second cavity through the air inlet holes and the bottom of the air deflector, and then enters the generator set, so that the controller is cooled, and meanwhile noise during air inlet is reduced. The air inlet chamber is divided into the first chamber and the second chamber by the arrangement of the air guide partition plate, so that the condition that the air inlet noise is large due to direct air inlet on the front side of the air guide cover is avoided, part of air can be blocked by the air guide partition plate, and then flows to the air inlet holes on two sides to enter from the air inlet holes, the circulation path of air flow is increased, and the noise during air inlet is further reduced.
Drawings
The utility model is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a front view of a generator set of the present utility model;
FIG. 2 is a cross-sectional view of the A-A plane of FIG. 1;
FIG. 3 is a front view of the genset of the present utility model with the forward air foil removed;
FIG. 4 is a front view of a first bulkhead of the generator set of the utility model;
FIG. 5 is a front view of a second bulkhead of the generator set of the utility model;
fig. 6 is a perspective view of the air guide partition of the present utility model.
The air intake chamber 10, the air intake chamber 11, the front air intake plate 111, the control panel 112, the front air intake 12, the air guide baffle 121, the vertical part 122, the bending part 123, the air intake hole 124, the wire harness through hole 13, the first chamber 14, the second chamber 15, the first baffle 151, the first air vent 152, the second air vent, the air outlet chamber 20, the air outlet chamber 21, the second baffle 211, the third air vent 212, the fourth air vent 22, the rear air outlet plate 30, the main body chamber 31, the air exhaust channel 4, the controller 5, the engine 51, the air guide cover 52, the axial flow fan 6, the flywheel fan 7, the air filter 81, the muffler 82, the muffler chamber 9, the oil tank A, the upper air intake area B and the lower air intake area.
Detailed Description
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
For the sake of simplicity of the drawing, the parts relevant to the present utility model are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present utility model, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
Referring to fig. 1, 2 and 3, a generator set includes an outer housing (not labeled), an engine 5, a generator (not labeled), an air inlet chamber 10, an air outlet chamber 20, a main body chamber 30, and an oil tank 9 disposed at the top of the generator set. The air inlet chamber 10, the air outlet chamber 20 and the main body chamber 30 are all positioned inside the outer shell, and the main body chamber 30 is positioned between the air inlet chamber 10 and the air outlet chamber 20 and is communicated with the air inlet chamber 10 and the air outlet chamber 20. The main body chamber 30 is internally provided with an engine 5, the air inlet chamber 10 is used for entering external cold air, and the air outlet chamber 20 is used for discharging hot air in the generator set and exhaust gas in the engine 5.
The outer housing includes a front air inlet plate 11 on the intake side of the engine 5 and a rear air outlet plate 22 on the exhaust side of the engine 5. A first partition plate 15 is arranged in the outer shell and between the engine 5 and the front air inlet plate 11, an air inlet chamber 10 is arranged between the first partition plate 15 and the front air inlet plate 11, a second partition plate 21 is arranged in the outer shell and between the engine 5 and the rear air outlet plate 22, and an air outlet chamber 20 is arranged between the second partition plate 21 and the rear air outlet plate 22.
An air guide partition plate 12 extending from top to bottom and a controller 4 positioned below the air guide partition plate 12 are arranged in the air inlet chamber 10. The area of the air inlet chamber 10, which is right opposite to the air guide baffle plate 12, is an upper air inlet area A, the area below the air guide baffle plate 12 is a lower air inlet area B, and the controller is positioned in the lower air inlet area B. The air inlet plate 11 is positioned at the outermost side of the generator set and serves as an outer housing of the air inlet surface of the generator set. A first partition 15 is located between the air inlet chamber 10 and the main body chamber 30 for separating the air inlet chamber 10 and the main body chamber 30.
The air guide partition 12 is located between the front air intake plate 11 and the first partition 15. The upper air inlet area A of the air inlet chamber 10 is divided into a first chamber 13 and a second chamber 14 which are communicated with each other by an air guide partition 12. The first chamber 13 is adjacent to the air inlet plate 11 and the second chamber 14 is adjacent to the first baffle 15. The air inlet plate 11 is divided into an upper part and a lower part, wherein the upper part is provided with a control panel 111, and the lower part is provided with a front air inlet 112.
Referring to fig. 1 and 6, a controller 4 is provided in the air inlet chamber 10, and the controller 4 is fixed to the bottom of the air inlet chamber 10 by a bracket. The controller 4 is disposed obliquely toward the air intake plate 11 from top to bottom, i.e., the upper end of the controller 4 is closer to the first separator 15 than the lower end. The air guide partition plate 12 is located above the controller 4, the air guide partition plate 12 includes a vertical portion 121 extending downward from the top of the air inlet chamber 10, and a bending portion 122 extending obliquely from the bottom end of the vertical portion 121 to the air inlet plate 11 from top to bottom, and the controller 4 is located in the middle of the lower portion of the bending portion 122.
The vertical portion 121 and the bending portion 122 are respectively provided with an air inlet 123 for air flow to pass through, and the air inlet 123 is respectively arranged at two sides of the vertical portion 121 and two sides of the bending portion 122. The air flow entering through the air inlet holes 123 at the two sides of the bending part 122 enters the second chamber 14 and the lower air inlet area B from the gaps at the two sides of the controller 4. The air inlet 123 of the bending part is positioned at two lateral sides of the controller 4 and is not arranged in the middle of the bending part, so that the interference between the direction of air flow flowing in by the air inlet 123 and the direction of air flow flowing upwards along the oblique direction of the controller 4 is avoided, the air flow is not smooth, and the heat dissipation efficiency is reduced. The vertical portion 121 is also provided with a harness through hole 124 through which a harness connected to the control panel 111 passes.
The external cold air enters the upper air inlet area A and the lower air inlet area B through the front air inlet 112 on the front air inlet plate 11. Air entering the upper air inlet area a passes through the air inlet 123 on the vertical portion 121 and the bending portion 122, and enters the second chamber 14 from the first chamber 13. The air entering the lower air inlet area B flows backwards through the gap between the lower part of the air guide baffle plate 12 and the bottom of the air inlet chamber 10. When air flows in from the lower part of the air guide partition plate 12, the air can flow around the controller 4 due to the blocking of the controller 4, and flows to the rear of the controller from the periphery of the controller 4, so that the heat dissipation and the temperature reduction of the controller 4 are realized, and meanwhile, the air flow path is increased, and the noise reduction effect is realized. After the air enters from the front air inlet 112, part of the air is blocked by the air guide partition plate 12, flows to the air inlet holes 123 on two sides, enters from the air inlet holes 123, increases the flow path of the air flow, and further reduces the noise during air intake.
Referring to fig. 2 and 4, the first partition 15 is located between the air guiding partition 12 and the engine 5, an air guiding cover 51 is arranged between the engine 5 and the first partition 15, a flywheel fan 6 is arranged in the air guiding cover 51, a generator is integrated in the flywheel fan 6, and the flywheel fan 6 is connected with a crankshaft of the engine 5. The flywheel fan 6 is provided with flywheel blades on an outer surface facing the first partition 15, and external air can be sucked into the air inlet chamber 10 when the flywheel fan 6 rotates. The air inlet end of the engine 5 is connected with an air filter 7, and the air filter 7 is arranged above the air guide cover 51 and is connected with the air inlet end of the cylinder cover of the engine 5. One end of the air guide cover 51 is fixed with the engine 5, and the other end of the air guide cover 51 is pressed against the first partition plate 15 through soundproof cotton to form a sealed channel. The first partition 15 is provided with a first vent 151 communicating the air guide cover 51 with the second chamber 14 and a second vent 152 communicating the second chamber 14 with the main body chamber 30, and the air cleaner 7 is located in the second vent 152 and leaves a gap with the edge of the second vent 152 for air to pass through.
The engine 5 includes an axial flow fan 52 located near the side of the air outlet chamber 20 and connected to the crankshaft of the engine 5, and the axial flow fan 52 and the flywheel fan 6 are located at both ends of the crankshaft and rotate synchronously with the rotation of the crankshaft. When the engine 5 is in operation, the crankshaft rotates to drive the flywheel fan 6 and the axial flow fan 52 to rotate. Under the rotation of the flywheel fan 6, external cold air enters the upper air inlet area A and the lower air inlet area B from the front air inlet 112 of the air inlet plate 11, and the air entering the upper air inlet area A enters the second chamber 14 from the first chamber 13 through the air inlet holes 123. A part of the air entering the lower air inlet area B flows back from both sides and downward of the controller 4, and another part flows back from both sides of the controller 4 and a gap between the upper side and the bending part 122 enters the second chamber 14 under the blocking of the controller 4.
When blocked by the controller 4, the air flows upward along the inclined surface of the controller, and the air flow is guided to the direction in which the air cleaner 7 is located by the guiding action of the bent portion 122. Under the rotation of the axial flow fan 52, the speed and the air inflow of the external cold air entering the air inlet chamber 10 can be increased, the air inlet efficiency is improved, and the cooling and heat dissipation efficiency is further improved.
Part of air entering from the upper air inlet area A and the lower air inlet area B enters the air guide cover 51 under the action of rotation of the flywheel fan 6, so that heat dissipation is carried out on the cylinder head and the engine body of the engine 5 and the flywheel fan 6; the other part enters the main body chamber 30 from the gap between the air filter 7 and the first partition plate 15 under the rotation action of the axial flow fan 52 to cool and dissipate heat of the engine 5; a further portion of the air entering the second chamber 14 passes through the air cleaner 7 into the interior of the engine 5 for combustion by the engine 5. Under the rotation action of the axial flow fan 52, external cold air can also directly enter the main body cavity through the through holes formed in the shells on the two sides of the generator set to dissipate heat and cool.
Referring to fig. 2 and 5, the second partition 21 is provided with a third air vent 211 communicating the air outlet chamber 20 with the main body chamber 30 and a fourth air vent 212 communicating the air guide cover 51 with the air outlet chamber 20, and the axial flow fan 52 is disposed corresponding to the third air vent 211. The rear air outlet plate 22 is located at the outermost side of the generator set and serves as an outer housing for the exhaust face of the generator set. The front air inlet plate 11 and the rear air outlet plate 22 are respectively positioned at the outermost ends of two opposite sides of the generator set. An exhaust duct 31 is provided between the air outlet chamber 20 and the cylinder head of the engine 5, and the exhaust duct 31 communicates with a fourth air port 212. The air introduced into the air guide cover 51 is cooled by the flywheel fan 6, the engine body and the cylinder head, and then is merged in the air discharge duct 31 to enter the air outlet chamber 20.
The exhaust chamber 20 is provided therein with a muffler 81 communicating with the exhaust end of the engine 5 and a muffler chamber 82 communicating with the main body chamber 30. Both the muffler 81 and the muffler chamber 82 are located between the second partition plate 21 and the rear air outlet plate 22, and the muffler 81 is located above the muffler chamber 82. The exhaust gas in the engine 5 is discharged through the muffler 81, and the hot air in the main body chamber 30 is discharged into the muffler chamber 82 by the axial flow fan 52 and then discharged to the outside through the rear air outlet plate 22.
The generator set of the utility model is driven by the engine 5,
outside air enters the air inlet chamber 10 from the air inlet plate 11, one part of the air enters the upper air inlet area A, the other part of the air enters the lower air inlet area B, the air entering the upper air inlet area A enters the second chamber 14 from the first chamber 13 through the air inlet holes 123, then enters the interior of the generator set, and finally is discharged from the air outlet chamber 20. The air entering the lower air inlet area B flows in from the lower part of the air guide partition plate 12, enters the inside of the generator set through the controller 4, cools the controller 4 and reduces noise during air inlet.
The air guide partition 12 divides the air inlet chamber 10 into a first chamber 13 and a second chamber 14, so that the condition of large air inlet noise caused by direct air inlet at the front of the air guide cover 51 is avoided. Meanwhile, the air guide partition plate 12 is provided with the bending part 122, so that the lower controller 4 can be protected, and screws and nuts on the back of the control panel 111 can be prevented from directly falling onto the controller 4, and the controller 4 is prevented from being damaged.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. The utility model provides a generating set, includes the external casing, is located the engine of external casing and with the generator that the engine is connected, the external casing is including the preceding aerofoil that is located the engine air inlet side and the back aerofoil that is located the engine exhaust side, be provided with first baffle in the external casing and be located between engine and the preceding air inlet board, its characterized in that still includes:
the air inlet chamber is positioned between the first partition plate and the front air inlet plate, an air guide partition plate extending from top to bottom is arranged in the air inlet chamber, a controller is arranged below the air guide partition plate, the area, right against the air guide partition plate, in the air inlet chamber is an upper air inlet area, the area below the air guide partition plate is a lower air inlet area, the air guide partition plate divides the upper air inlet area into a first cavity and a second cavity which are communicated, and air inlet holes are formed in the air guide partition plate;
the hot air in the generator set is discharged to the outside from the air outlet chamber, and the air outlet chamber is arranged opposite to the air inlet chamber;
the main body chamber is positioned between the air inlet chamber and the air outlet chamber, and the engine and the generator are both arranged in the main body chamber;
under the drive of the engine, external air enters the air inlet chamber from the front air inlet plate, one part of air enters the upper air inlet region, the other part of air enters the lower air inlet region, the air entering the upper air inlet region enters the second chamber from the first chamber through the air inlet hole, then enters the main body chamber, the air entering the lower air inlet region flows in from the lower part of the air guide partition plate, enters the main body chamber through the controller and dissipates heat and cools the controller.
2. The generator set of claim 1, wherein the air guide partition includes a vertical portion extending downward from the top of the air inlet chamber and a bending portion extending obliquely from the bottom end of the vertical portion to the air inlet plate from top to bottom, and the controller is disposed below the bending portion.
3. The generator set of claim 2, wherein the controller is disposed obliquely from top to bottom to the side where the front air intake plate is located, and the controller is disposed in the middle of the lower portion of the bending portion.
4. The generator set of claim 3, wherein the vertical portion and the bending portion are respectively provided with an air inlet, and the air inlet is respectively arranged at two sides of the vertical portion and two sides of the bending portion, and air flows entering through the air inlet at two sides of the bending portion are blown to gaps at two sides of the controller.
5. The generator set of claim 4, wherein the first partition is located between a wind guiding partition and an engine, a wind guiding cover is arranged between the engine and the first partition, a flywheel fan is arranged in the wind guiding cover, the generator is integrated in the flywheel fan, and the flywheel fan is connected with a crankshaft of the engine.
6. The generator set of claim 5, further comprising an air cleaner coupled to the air intake of the engine, the air cleaner disposed above the air scoop.
7. The generator set of claim 6, wherein the first partition is provided with a first vent opening communicating the air guide cover with the air inlet chamber and a second vent opening communicating the second chamber with the main body chamber, and the air filter is positioned in the second vent opening and is spaced from the edge of the second vent opening.
8. The generator set of claim 7, wherein the engine comprises an axial fan located at a side of the air outlet chamber and connected to a crankshaft of the engine, and the axial fan and the flywheel fan are located at both ends of the crankshaft, respectively, and rotate synchronously with rotation of the crankshaft.
9. The generator set of claim 8, wherein a second partition is disposed in the outer housing and between the engine and the rear air outlet plate, the air outlet chamber is disposed between the second partition and the rear air outlet plate, the second partition is provided with a third air outlet communicating the air outlet chamber with the main body chamber, and the axial flow fan is disposed corresponding to the third air outlet.
10. The generator set of claim 9, wherein a muffler is disposed in the outlet chamber in communication with the exhaust end of the engine, the muffler being located above the axial flow fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320345188.8U CN219529142U (en) | 2023-03-01 | 2023-03-01 | Generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320345188.8U CN219529142U (en) | 2023-03-01 | 2023-03-01 | Generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219529142U true CN219529142U (en) | 2023-08-15 |
Family
ID=87582179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320345188.8U Active CN219529142U (en) | 2023-03-01 | 2023-03-01 | Generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219529142U (en) |
-
2023
- 2023-03-01 CN CN202320345188.8U patent/CN219529142U/en active Active
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