A finned evaporator with high heat dissipation
By driving the evaporator assembly to expand or close, adjust the gas flow rate, the problems of low heat exchange efficiency and energy consumption loss in existing evaporators are solved, and the effects of efficient heat dissipation and low energy consumption are achieved.
Patent Information
- Application Number
- CN202411877068.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2044-12-19
AI Technical Summary
In the existing evaporators, due to the side-by-side fixed structure, the heat exchange pipes have too many repetitive areas of gas flow, which reduces the heat exchange efficiency, and cannot adjust the heat exchange efficiency according to the gas flow rate, resulting in energy consumption loss.
By driving the connecting assembly to move up and down, the evaporator assembly is driven to expand or close along the directional assembly, adjust the flow rate of gas in the box, thereby controlling the heat exchange efficiency of the evaporator assembly.
The heat exchange efficiency of the evaporator assembly is dynamically adjusted according to the gas flow rate, the heat dissipation performance of the evaporator is improved, and energy consumption loss is avoided.
Smart Images

Figure CN119436621B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigeration equipment, and particularly relates to a fin evaporator with high heat dissipation efficiency. Background Art
[0002] Evaporation is a physical process in which a liquid is transformed into a gas; generally speaking, an evaporator is an object in which a liquid substance is transformed into a gas; there are a large number of evaporators in industry, and the evaporator applied to a refrigeration system is one of them; the evaporator is a very important component among the four major components of refrigeration. The low-temperature condensed liquid passes through the evaporator and exchanges heat with the outside air, vaporizing and absorbing heat to achieve the refrigeration effect. The evaporator mainly consists of a heating chamber and an evaporation chamber; the heating chamber provides the heat required for evaporation to the liquid, promoting the liquid to boil and vaporize; the evaporation chamber completely separates the gas-liquid two-phase.
[0003] For example, in the Chinese patent with the publication number CN114251877A and the name "Fin-Type Evaporator", it includes an evaporation tube and brackets I and II with the same structure design. A bracket I is fixedly connected to the left side of the outer surface of the evaporation tube, and a bracket II is fixedly connected to the right side of the outer surface of the evaporation tube. A number of groups of fins are equidistantly distributed between the bracket I and the bracket II. The evaporation tube penetrates through the fins and extends to the outside of the bracket I and the bracket II. A cleaning mechanism is arranged between adjacent fins. A rotating mechanism is arranged on the right side of the bracket II. A first air hole is opened on the right outer surface of the bracket II. A support frame is fixedly connected to the right outer surface of the bracket II in an annular and equidistant manner; this fin-type evaporator can not only clean the dust accumulated between the fins to avoid polluting the air in the workshop, but also defrost the frost formed on the fins to prevent the frost from blocking the heat exchange between the evaporator and the air, improving the working efficiency of the equipment.
[0004] The deficiencies of the prior art are that due to the way that the heat exchange tubes in the evaporator are arranged in a side-by-side fixed structure, during the high-efficiency heat exchange process, the heat exchange tubes are too concentrated, and there are too many overlapping areas for the gas to flow between the heat exchange tubes, resulting in a reduction in the heat exchange efficiency of the heat exchange tubes in the overlapping areas and the phenomenon that the gas is restricted during the heat exchange process. Summary of the Invention
[0005] The object of the present invention is to provide a fin evaporator with efficient heat dissipation, wherein the driving assembly drives the linkage assembly to reciprocate up and down, and the linkage assembly drives the movably connected evaporator assembly to expand or close in an inverted V structure along the directional assembly to both ends, and the guide assembly arranged at one end of the evaporator assembly is opened or closed, and the heat exchange efficiency of the evaporator assembly is improved by increasing the flow rate of the gas in the box. When the gas flow rate in the box is reduced, the evaporator assembly is closed and docked with the exhaust end at the top of the box, and the guide assembly is closed to form a channel, so that the evaporator assembly can work under a low energy consumption state, so that the device can control the heat exchange efficiency of the evaporator assembly according to the flow rate of the gas in the box, thereby avoiding the phenomenon that the evaporator assembly cannot control the heat exchange efficiency according to the gas flow rate. Loss of energy consumption.
[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fin evaporator with high efficiency heat dissipation, comprising a box body and an evaporator assembly symmetrically arranged in the box body; a driving assembly is provided at the top of the box body, and the driving assembly drives the linkage assembly to drive the evaporator assembly to expand or close along the directional assembly; a guide assembly is provided at one end of the evaporator assembly, and the guide assembly is opened and closed synchronously by the expansion or closing of the evaporator assembly, so that the evaporator assembly is extended to increase the heat exchange efficiency or closed to reduce the heat exchange energy consumption under the movement of the driving assembly driving the linkage assembly;
[0007] As a further description of the above technical solution:
[0008] The driving assembly comprises a driving motor, and the driving motor is fixed on the box body, one end of the driving motor is fixedly connected with an eccentric disk, one end of the eccentric disk is fixedly connected with an eccentric shaft, and the eccentric shaft is drivingly connected with a linkage assembly.
[0009] As a further description of the above technical solution:
[0010] The linkage assembly includes a connecting column, two ends of which are symmetrically fixedly connected with triangular plates, a linkage rod is symmetrically arranged between the two triangular plates, one end of the triangular plate is fixedly connected with a limit frame, and the limit frame is adapted to the eccentric shaft.
[0011] As a further description of the above technical solution:
[0012] The evaporator assembly comprises a rectangular bar, a heat exchange tube is arranged between two of the rectangular bars, and a fin block is arranged on the outer side of the heat exchange tube, and the top end of the rectangular bar is movably connected with a linkage rod.
[0013] As a further description of the above technical solution:
[0014] The bottom end of the rectangular strip is rotatably connected with a rotating shaft rod, and both ends of the rotating shaft rod are symmetrically and movably connected with directional wheels.
[0015] As a further description of the above technical solution:
[0016] The guiding component includes a support bar, and sleeve pieces are symmetrically and fixedly connected to both ends of the support bar. The sleeve pieces are respectively sleeved on a linkage rod and a rotating shaft rod. A plurality of connecting pieces are arranged in an array at one end of the support bar, and a flow guiding plate is arranged at one end of each connecting piece.
[0017] As a further description of the above technical solution:
[0018] A rotating rod is arranged at one end of the flow guiding plate, a movable strip is arranged at one end of the rotating rod, and a movable wheel is arranged at the bottom end of the movable strip.
[0019] As a further description of the above technical solution:
[0020] A positioning rod is fixedly connected between the movable strip and one end of the support bar, a fixed ear is fixedly connected to one end of the positioning rod, and a support spring is fixedly connected between the two fixed ears.
[0021] As a further description of the above technical solution:
[0022] The orientation component includes an orientation bar. An orientation groove one is formed at one end of the orientation bar, and the orientation groove one is adapted to the movable wheel. An orientation groove two is formed at one end of the orientation bar close to the orientation groove one, and the orientation groove two is adapted to an orientation wheel.
[0023] As a further description of the above technical solution:
[0024] An upper flow guiding cover is fixedly connected to the top end of the box body, an exhaust end is fixedly connected to the top end of the upper flow guiding cover, a lower flow guiding cover is fixedly connected to the bottom end of the box body, an air inlet end is fixedly connected to the bottom end of the lower flow guiding cover, and support legs are fixedly connected to the bottom end of the box body.
[0025] The present invention provides a fin evaporator with high heat dissipation efficiency, and has the following beneficial effects:
[0026] In the present invention, the driving component drives the linkage component to reciprocate up and down. The linkage component drives the movably connected evaporator component to expand or close in an inverted V structure at both ends along the orientation component. The guiding component arranged at one end of the evaporator component is opened or closed. By increasing the flow rate of the gas in the box body, the heat exchange efficiency of the evaporator component is improved. When the flow rate of the gas in the box body decreases, the evaporator component closes and is docked with the exhaust end at the top end of the box body. The guiding component closes to form a channel, so that the evaporator component works in a low energy consumption state, realizing that the device can control the heat exchange efficiency of the evaporator component according to the flow rate of the gas in the box body, and avoiding the phenomenon of energy consumption loss caused by the inability of the evaporator component to control the heat exchange efficiency according to the gas flow rate. Description of the Drawings
[0027] Figure 1 Structural schematic diagram of a fin evaporator with high heat dissipation proposed by the present invention;
[0028] Figure 2 Structural schematic diagram of the box body in the present invention;
[0029] Figure 3 Structural schematic diagram of the drive assembly in the present invention;
[0030] Figure 4 Structural schematic diagram of the limit frame in the present invention;
[0031] Figure 5 Structural schematic diagram of the evaporator assembly in the present invention;
[0032] Figure 6 Structural schematic diagram of the directional wheel in the present invention;
[0033] Figure 7 In the present invention Figure 6 Partial schematic diagram at position A;
[0034] Figure 8 Structural schematic diagram of the guiding assembly in the present invention;
[0035] Figure 9 In the present invention Figure 8 Partial schematic diagram at position B.
[0036] Legend: 1. Box body; 11. Upper flow guide cover; 12. Exhaust end; 13. Lower flow guide cover; 14. Intake end; 15. Support leg; 2. Drive assembly; 21. Drive motor; 22. Eccentric disc; 23. Eccentric shaft; 3. Linkage assembly; 31. Connecting column; 32. Triangular plate; 33. Linkage rod; 34. Limit frame; 4. Evaporator assembly; 41. Rectangular bar; 42. Heat exchange tube; 43. Fin block; 44. Rotating shaft rod; 45. Directional wheel; 5. Guiding assembly; 51. Support bar; 52. Collar piece; 53. Deflector; 54. Movable bar; 55. Movable wheel; 56. Connecting piece; 57. Positioning rod; 58. Fixed ear; 59. Support spring; 510. Rotating rod; 6. Directional assembly; 61. Directional bar; 62. First directional groove; 63. Second directional groove. Detailed implementation manners
[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0038] Refer to Figures 1-9, A fin evaporator with high heat dissipation efficiency, comprising a box body 1 and evaporator components 4 symmetrically arranged inside the box body 1; a driving component 2 is provided at the top of the box body 1, and the driving component 2 drives a linkage component 3 to drive the evaporator component 4 to unfold or close along a guiding component 6. One end of the evaporator component 4 is provided with a guiding component 5, and the guiding component 5 is opened and closed synchronously with the unfolding or closing of the evaporator component 4, so as to realize that the evaporator component 4 increases the heat exchange efficiency when stretching under the drive of the driving component 2 driving the linkage component 3 or reduces the heat exchange energy consumption when closing;
[0039] Specifically, evaporator components 4 are symmetrically arranged inside the box body 1. A linkage component 3 is movably connected to the top of the evaporator component 4. The driving component 2 drives the linkage component 3 to move up and down reciprocally. The linkage component 3 drives the movably connected evaporator component 4 to unfold along the guiding component 6 into an inverted V structure at both ends. The unfolded evaporator component 4 increases the contact area with the gas. The guiding component 5 arranged at one end of the evaporator component 4 is opened, and the heat exchange efficiency of the evaporator component 4 is improved by increasing the gas flow rate in the box body 1. When the gas flow rate in the box body 1 decreases, the driving component 2 drives the linkage component 3 to drive the evaporator component 4 to close and dock with the exhaust end 12 at the top of the box body 1. The guiding component 5 arranged at one end of the evaporator component 4 is closed to form a channel, so that the evaporator component 4 works in a low-energy consumption state, realizing that the device can control the heat exchange efficiency of the evaporator component 4 according to the gas flow rate in the box body 1, and avoiding the phenomenon of energy consumption loss caused by the inability of the evaporator component 4 to control the heat exchange efficiency according to the gas flow rate;
[0040] The driving component 2 includes a driving motor 21, and the driving motor 21 is fixed on the box body 1. One end of the driving motor 21 is fixedly connected with an eccentric disc 22. One end of the eccentric disc 22 is fixedly connected with an eccentric shaft 23, and the eccentric shaft 23 is drivingly connected with a linkage component 3; the linkage component 3 includes a connecting column 31. Triangular plates 32 are symmetrically fixedly connected to both ends of the connecting column 31. Linkage rods 33 are symmetrically arranged between the two triangular plates 32. One end of the triangular plate 32 is fixedly connected with a limiting frame 34, and the limiting frame 34 is adapted to the eccentric shaft 23;
[0041] Specifically, the driving motor 21 in the driving component 2 drives the fixedly connected eccentric disc 22 to rotate. The eccentric shaft 23 fixedly connected in the eccentric disc 22 is adapted to the limiting frame 34 in the linkage component 3. When the driving motor 21 drives the eccentric shaft 23 fixedly connected with the eccentric disc 22 to move, the limiting frame 34 reciprocates up and down between the upper and lower parts of the box body 1 under the drive of the sleeved eccentric shaft 23, so that the linkage rods 33 in the linkage component 3 drive the two symmetrically arranged evaporator components 4 to move along the guiding component 6 into an inverted V structure, realizing that the evaporator component 4 unfolds more conveniently in the box body 1, with a simple structure and flexible use;
[0042] The evaporator assembly 4 includes a rectangular strip 41. A heat exchange tube 42 is provided between two rectangular strips 41, and fin blocks 43 are arranged outside the heat exchange tube 42. The top end of the rectangular strip 41 is movably connected to the linkage rod 33. The bottom end of the rectangular strip 41 is rotatably connected to a rotating shaft rod 44, and two ends of the rotating shaft rod 44 are symmetrically and movably connected to directional wheels 45.
[0043] Specifically, the rectangular strips 41 in the evaporator assembly 4 are symmetrically distributed at both ends of the heat exchange tube 42. The fin blocks 43 fixedly connected in the heat exchange tube 42 are used to increase the area of contact with the gas, so as to improve the heat exchange efficiency of the heat exchange tube 42. Through the movable connection between the top end of the rectangular strip 41 and the linkage rod 33, directional wheels 45 are symmetrically arranged at both ends of the rotating shaft rod 44 rotatably connected to the bottom end of the rectangular strip 41. The directional wheels 45 are adapted to the directional assembly 6, so that the linkage assembly 3 drives the evaporator assembly 4 to unfold or close along the directional assembly 6. The directional assembly 6 limits the directional wheels 45, so as to be more stable during the unfolding or closing process of the evaporator assembly 4 and improve the convenience of using this device.
[0044] The guiding assembly 5 includes a support strip 51. Sleeve pieces 52 are symmetrically and fixedly connected to both ends of the support strip 51, and the sleeve pieces 52 are respectively sleeved on the linkage rod 33 and the rotating shaft rod 44. Connecting pieces 56 are arranged in an array at one end of the support strip. A flow guide plate 53 is provided at one end of the connecting piece 56. A rotating rod 510 is provided at one end of the flow guide plate 53. An activity strip 54 is provided at one end of the rotating rod 510. An activity wheel 55 is provided at the bottom end of the activity strip 54. A positioning rod 57 is fixedly connected between the activity strip 54 and one end of the support strip 51. A fixed ear 58 is fixedly connected to one end of the positioning rod 57. A support spring 59 is fixedly connected between two fixed ears 58.
[0045] Specifically, in the guiding assembly 5, the support strip 51 is movably connected to the linkage rod 33 and the rotating shaft rod 44 respectively through the sleeve pieces 52 fixedly connected to both ends. When the linkage assembly 3 drives the evaporator assembly 4 to unfold towards both ends along the directional assembly 6, the activity strip 54 connected to the flow guide plate 53 through the rotating rod 510 is opened under the action of the support spring 59. The support spring 59 is fixed to the activity strip 54 and the support strip 51 respectively through the positioning rod 57. When the linkage assembly 3 drives the evaporator assembly 4 to contract, when the activity wheel 55 movably connected to one end of the activity strip 54 moves along the directional assembly 6, the activity wheel 55 drives the flow guide plate 53 to fit with the support strip 51 through the activity strip 54, so that the flow guide plate 53 is closed to form a guiding channel, so that the guiding assembly 5 can move synchronously according to the movement of the evaporator assembly 4 and be adjusted according to the change of the gas flow rate in the box body 1, improving the convenience of using this device.
[0046] The directional assembly 6 includes a directional strip 61. A first directional groove 62 is opened at one end of the directional strip 61, and the first directional groove 62 is adapted to the activity wheel 55. A second directional groove 63 is opened at one end of the directional strip 61 close to the first directional groove 62, and the second directional groove 63 is adapted to the directional wheel 45.
[0047] Specifically, the orientation bar 61 in the orientation component 6 is fixed on the box body 1. The first orientation groove 62 and the second orientation groove 63 formed in the orientation bar 61 have a structure that is higher in the middle and lower at both ends, so as to facilitate the more convenient gathering and stretching of the evaporator component 4 and the guiding component 5 under the drive of the linkage component 3;
[0048] The top end of the box body 1 is fixedly connected with an upper flow guide cover 11, the top end of the upper flow guide cover 11 is fixedly connected with an exhaust end 12, the bottom end of the box body 1 is fixedly connected with a lower flow guide cover 13, the bottom end of the lower flow guide cover 13 is fixedly connected with an air inlet end 14, and the bottom end of the box body 1 is fixedly connected with a support leg 15;
[0049] Specifically, the upper flow guide cover 11 and the exhaust end 12 fixedly connected to the top end of the box body 1 and the lower flow guide cover 13 and the air inlet end 14 fixedly connected to the bottom end of the box body 1 are symmetrically structured, so as to facilitate the more flexible unfolding of the evaporator component 4 in the box body 1. At the same time, it is convenient to disperse and gather the gas in the box body 1, improving the efficiency of the evaporator component 4 during use.
[0050] Working principle: Evaporator components 4 are symmetrically arranged inside the box body 1. A linkage component 3 is movably connected to the top of the evaporator component 4. The linkage component 3 is driven by a driving component 2 to move up and down reciprocally. The linkage component 3 drives the movably connected evaporator component 4 to expand in an inverted V structure along the orientation component 6 towards both ends. The expanded evaporator component 4 increases the contact area with the gas. The guiding component 5 arranged at one end of the evaporator component 4 is opened, and the heat exchange efficiency of the evaporator component 4 is improved by increasing the flow rate of the gas in the box body 1. When the gas flow rate in the box body 1 decreases, the driving component 2 drives the linkage component 3 to drive the evaporator component 4 to close and dock with the exhaust end 12 at the top of the box body 1. The guiding component 5 arranged at one end of the evaporator component 4 is closed to form a channel, enabling the evaporator component 4 to work in a low-energy consumption state. Among them, in the driving component 2, the driving motor 21 drives the fixedly connected eccentric disk 22 to rotate. The eccentric shaft 23 fixedly connected in the eccentric disk 22 is adapted to the limit frame 34 in the linkage component 3. When the driving motor 21 drives the eccentric shaft 23 fixedly connected to the eccentric disk 22 to move, the limit frame 34 drives the reciprocating movement between the top and bottom of the box body 1 under the drive of the sleeved eccentric shaft 23, so that the connecting rod 33 in the linkage component 3 drives the two symmetrically arranged evaporator components 4 to move in an inverted V structure along the orientation component 6. Secondly, in the guiding component 5, the support bar 51 is movably connected to the connecting rod 33 and the rotating shaft rod 44 respectively through the sleeve rings 52 fixedly connected at both ends. When the linkage component 3 drives the evaporator component 4 to expand towards both ends along the orientation component 6, the movable bar 54 connected by the rotating rod 510 in the flow guiding plate 53 is opened under the action of the support spring 59. The support spring 59 is fixed on the movable bar 54 and the support bar 51 respectively through the positioning rod 57. When the linkage component 3 drives the evaporator component 4 to contract, when the movable wheel 55 movably connected to one end of the movable bar 54 moves along the orientation component 6, the movable wheel 55 drives the flow guiding plate 53 to fit with the support bar 51 through the movable bar 54, so that the flow guiding plate 53 is closed to form a guiding channel, facilitating the synchronous movement of the guiding component 5 according to the movement of the evaporator component 4, realizing that the device can control the heat exchange efficiency of the evaporator component 4 according to the gas flow rate in the box body 1, and avoiding the phenomenon of energy consumption loss caused by the inability of the evaporator component 4 to control the heat exchange efficiency according to the gas flow rate.
[0051] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.
Claims
1. A finned evaporator with high heat dissipation efficiency, characterized in that: It comprises a housing (1) and an evaporator assembly (4) symmetrically arranged in the housing (1); A driving component (2) is provided at the top of the housing (1); the driving component (2) drives the linkage component (3) to drive the evaporator component (4) to expand or close along the directional component (6); a guide component (5) is provided at one end of the evaporator component (4); the guide component (5) is opened and closed synchronously with the expansion or closing of the evaporator component (4), so that the evaporator component (4) can expand to increase heat exchange efficiency or close to reduce heat exchange energy consumption when the driving component (2) drives the linkage component (3) to move; The driving assembly (2) comprises a driving motor (21), and the driving motor (21) is fixed on the housing (1); one end of the driving motor (21) is fixedly connected to an eccentric disk (22); one end of the eccentric disk (22) is fixedly connected to an eccentric shaft (23); and the eccentric shaft (23) is drivingly connected to a linkage assembly (3); The linkage assembly (3) comprises a connecting column (31), two ends of the connecting column (31) are symmetrically fixedly connected to triangular plates (32), a linkage rod (33) is symmetrically arranged between the two triangular plates (32), one end of the triangular plate (32) is fixedly connected to a limit frame (34), and the limit frame (34) is adapted to fit the eccentric shaft (23).
2. The fin evaporator with high heat dissipation efficiency according to claim 1, characterized in that: The evaporator assembly (4) comprises a rectangular bar (41), a heat exchange tube (42) is provided between two of the rectangular bars (41), and a fin block (43) is provided outside the heat exchange tube (42), and the top end of the rectangular bar (41) is movably connected to the linkage rod (33).
3. The fin evaporator with high heat dissipation efficiency according to claim 2, characterized in that: The bottom end of the rectangular strip (41) is rotatably connected to a rotating shaft rod (44), and both ends of the rotating shaft rod (44) are symmetrically and movably connected to directional wheels (45).
4. The fin evaporator with high heat dissipation efficiency according to claim 1, characterized in that: The guide assembly (5) comprises a support bar (51), with collar pieces (52) symmetrically fixedly connected at both ends of the support bar (51), and the collar pieces (52) respectively sleeved with a link rod (33) and a rotating shaft rod (44), and a connecting piece (56) arrayed at one end of the support bar (51), and a guide plate (53) at one end of the connecting piece (56).
5. The fin evaporator with high heat dissipation efficiency according to claim 4, characterized in that: A rotating rod (510) is provided at one end of the guide plate (53), a movable bar (54) is provided at one end of the rotating rod (510), and a movable wheel (55) is provided at the bottom end of the movable bar (54).
6. The fin evaporator with high heat dissipation efficiency according to claim 5, characterized in that: A positioning rod (57) is fixedly connected to one end of the movable bar (54) and the support bar (51); a fixing ear (58) is fixedly connected to one end of the positioning rod (57); and a supporting spring (59) is fixedly connected between the two fixing ears (58).
7. The fin evaporator with high heat dissipation efficiency according to claim 1, characterized in that: The orientation component (6) comprises an orientation bar (61), one end of the orientation bar (61) is provided with an orientation groove 1 (62), and the orientation groove 1 (62) is adapted to fit the movable wheel (55), and one end of the orientation bar (61) close to the orientation groove 1 (62) is provided with an orientation groove 2 (63), and the orientation groove 2 (63) is adapted to fit the orientation wheel (45).
8. The fin evaporator with high heat dissipation efficiency according to claim 1, characterized in that: The top end of the box body (1) is fixedly connected to an upper air guide cover (11), the top end of the upper air guide cover (11) is fixedly connected to an exhaust end (12), the bottom end of the box body (1) is fixedly connected to a lower air guide cover (13), the bottom end of the lower air guide cover (13) is fixedly connected to an air intake end (14), and the bottom end of the box body (1) is fixedly connected to a support leg (15).
Citation Information
Patent Citations
Finned evaporator
CN114251877A
Stainless steel double-pipe heat exchanger
CN111692898A
Novel evaporator capable of improving waste heat generating capacity
CN217274047U