Fully-closed extensible air-cooled case

Abstract

The invention discloses a totally-enclosed extensible air-cooled case, and relates to the technical field of electronic warfare equipment, the totally-enclosed extensible air-cooled case comprises an upper cover, a lower cover and a case body, an independent air duct cavity and four groups of equipment mounting cavities are formed in a frame of the case body, totally-enclosed is realized through a sealing ring and a sealing rope, and the rainproof and electromagnetic shielding requirements are met; the frame is provided with a standardized interface and supports longitudinal expansion of multiple box bodies; the heat dissipation fins are provided with heat collection bins and heat dissipation teeth capable of being unfolded in a sliding mode, the heat dissipation teeth are matched with shape memory alloy heat collection springs and push rods to form a self-adaptive heat dissipation structure, the heat dissipation teeth are attached and semi-embedded under the low-power working condition, the heat dissipation teeth automatically stretch out and are unfolded under the high-power working condition, and the heat dissipation area and efficiency are improved. And the fan is detachably connected through the fan mounting plate, so that quick replacement of models is supported. The computer case solves the defects that a conventional case is poor in environmental adaptability, low in expandability and fixed in heat dissipation efficiency, and is suitable for complex electronic systems with high environmental adaptability requirements such as an electronic warfare system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fully-closed expandable air-cooled machine boxes, in particular to a fully-closed expandable air-cooled machine box. BACKGROUND

[0002] The working environment of electronic warfare systems is often accompanied by harsh conditions such as rain, sand, high humidity, electromagnetic interference, etc. As the equipment carrier, the machine case needs to meet the three core requirements of "efficient heat dissipation", "environmental protection" and "flexible expansion". On the one hand, a large amount of heat will be generated when the electronic equipment in the machine case operates, and if the heat is not dissipated in time, it will easily lead to equipment downtime and affect system reliability. On the other hand, it is necessary to isolate the external environment from the internal equipment, and at the same time have electromagnetic shielding capability to avoid external interference affecting the normal work of the equipment. In addition, with the iteration of electronic equipment technology, users often need to upgrade or replace the equipment in the machine case or add functional modules, so the machine case needs to have expandability to avoid the waste of cost caused by repeated design.

[0003] In the prior art, the conventional air-cooled machine case usually adopts the design of "direct air cooling of equipment and external environment", that is, the cooling air flow directly flows through the surface of the equipment. Although this design can achieve heat dissipation, rain and sand from the external environment can easily enter the machine case along with the air flow, causing short circuit or corrosion of the equipment, and the environmental adaptability is poor. At the same time, the internal installation space and heat dissipation capacity of the conventional machine case are fixed after the design is finalized, and it is not possible to flexibly add or reduce equipment or adjust the heat dissipation configuration according to user needs. If the function needs to be expanded, the machine case structure needs to be redesigned, and the expandability is poor, which limits the popularization and application of the product.

[0004] In addition, the heat dissipation components (such as heat dissipation fins) of the existing machine case are mostly fixed structures, and the size and shape of the heat dissipation teeth cannot be dynamically adjusted according to the heat consumption of the equipment. Under low-power working conditions, fixed heat dissipation teeth can easily cause excessive air duct resistance and uneven air flow distribution. Under high-power working conditions, insufficient heat dissipation tooth area can also cause heat dissipation bottlenecks, and it is not possible to achieve "on-demand heat dissipation", resulting in low heat dissipation efficiency and energy waste.

[0005] In view of the above defects, there is an urgent need for an air-cooled machine case that has the functions of full-closed protection, expandable installation and self-adaptive heat dissipation to meet the use requirements of harsh scenes such as electronic warfare systems. SUMMARY

[0006] In order to solve the deficiencies of the prior art, the present application provides a fully-closed expandable air-cooled machine case.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a fully-closed expandable air-cooled machine case, comprising an upper cover, a lower cover and a case body, the upper cover and the case body, the lower cover and the case body are connected through screws, and each connecting surface is provided with a sealing ring to realize water-tight sealing of the contact surface, in addition, comprising: The heat dissipation fin, the box includes a frame, the frame is arranged with fixing interface for fixing the upper cover and the lower cover, the fixing interface is same in size, the inner part of the four sides of the frame is provided with a heat dissipation fin mounting slot, four heat dissipation fins are mounted in the mounting slot, the middle area of the frame is closed to form an air duct, and a sealing rope is arranged between the heat dissipation fin and the frame to realize sealing with the external environment.

[0008] In an embodiment, the top of the upper cover and the bottom of the lower cover are provided with ventilation grilles, and the grilles are provided with mounting interfaces in position for mounting connectors to realize communication between the case and external equipment.

[0009] In an embodiment, the box further includes four first cover plates, four second cover plates, a fan and a mounting plate, the four sides of the frame are provided with first cover plate mounting interfaces and second cover plate mounting interfaces outside, the first cover plates are connected with the first cover plate mounting interfaces, the second cover plates are connected with the second cover plate mounting interfaces, and sealing ropes are arranged between the first cover plates, the second cover plates and the frame.

[0010] In an embodiment, the middle part of the case forms an air duct cavity, and the periphery of the air duct cavity is provided with a plurality of equipment mounting cavities, and the vertical beams and the upper and lower plates of the frame are provided with through holes, so that the equipment mounting cavities are in communication with each other.

[0011] In an embodiment, the middle part of the frame is provided with a group of fan mounting interfaces at the upper end and the lower end respectively, for mounting a fan, the fan is fixed on a mounting plate, and the mounting plate is fixed with the frame through the fan mounting interfaces.

[0012] In an embodiment, one side of the heat dissipation fin is a heat dissipation tooth, and the other side is an equipment mounting surface, the size of the heat dissipation tooth is determined according to the heat dissipation requirement of the equipment, and the mounting surface is embedded with a heat pipe.

[0013] In an embodiment, one side of the heat dissipation fin is provided with a plurality of hump-shaped heat collection warehouses, the heat dissipation tooth is slidingly mounted in the heat collection warehouse, and a return spring is connected between the middle part of the heat dissipation tooth and the inner wall of the heat collection warehouse.

[0014] In an embodiment, the heat dissipation tooth is a double-layer laminated structure, and the upper end and the lower end are both inclined to form a separation groove, the end part of the heat collection warehouse is fixedly provided with a separation rod, and the separation rod is inserted into the separation groove.

[0015] In an implementation, the installation surface is uniformly provided with heat collection grooves corresponding to the heat collection bins, the middle part of the heat collection groove is fixedly provided with a heat collection spring, both ends of the heat collection spring are free ends, and the heat collection groove is slidably provided with a heat collection rod.

[0016] In an implementation, the installation surface and the heat dissipation teeth are both provided with hole grooves for assisting heat dissipation.

[0017] In an implementation, the installation surface and the heat dissipation teeth are both provided with hole grooves for assisting heat dissipation.

[0018] The full-closed expandable air-cooled machine box has the following beneficial effects: the equipment installation cavity and the air duct cavity are independent and the equipment cavity is fully closed, good rain-proof and electromagnetic shielding are realized by cooperating with a sealing ring and a sealing rope, environmental adaptability is high, internal equipment can be stably worked in a harsh environment; the frame is provided with a fixed interface with a unified size, supports longitudinal expansion of multiple box bodies, the fan is detachably connected with the frame through an installation plate, the fan model can be replaced as needed, expansion is flexible, different equipment quantity and heat consumption requirements are adapted, and upgrading cost is reduced; the self-adaptive heat dissipation structure of the heat dissipation fins can dynamically adjust the extension state and the unfolded form of the heat dissipation teeth according to equipment heat consumption, air resistance is reduced to keep airflow uniform at low power, heat dissipation area and heat exchange path are increased at high power, efficient heat dissipation and energy saving can be realized without electric control. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below in combination with the drawings and examples.

[0020] Figure 1 FIG. 1 is a schematic diagram of the overall shape of the full-closed expandable air-cooled machine box of the application; Figure 2 FIG. 2 is a schematic diagram of the box body shape of the full-closed expandable air-cooled machine box of the application; Figure 3 FIG. 3 is an exploded view of the full-closed expandable air-cooled machine box of the application; Figure 4 FIG. 4 is a schematic diagram of the cross section of the full-closed expandable air-cooled machine box of the application; Figure 5 FIG. 5 is a schematic diagram of the frame of the application; Figure 6 FIG. 6 is a schematic diagram of the heat dissipation fin installation groove of the application; Figure 7 FIG. 7 is a schematic diagram of the structure of the heat dissipation fin of the application; Figure 8 FIG. 8 is a schematic diagram of the heat dissipation tooth installation groove of the application; Figure 9 FIG. 9 is a schematic diagram of the heat dissipation tooth of the application;Figure 8 Enlarged diagram of point A in the diagram; Figure 10 This is a schematic cross-sectional view of the heat dissipation fins of the present invention; Figure 11 This is a schematic diagram of a fully enclosed, expandable air-cooled chassis according to the present invention.

[0021] In the diagram: 1. Top cover; 2. Bottom cover; 3. Housing; 34. Heat dissipation fins; 315. Mounting slot; 11. Grille; 32. First cover plate; 33. Second cover plate; 34. Heat dissipation fins; 35. Fan; 36. Mounting plate; 316. First mounting interface; 317. Second mounting interface; 4. Air duct cavity; 51. Mounting cavity; 311. Fixing interface; 313. Mounting interface; 341. Heat dissipation teeth; 342. Mounting surface; 340. Heat collection chamber; 3401. Return spring; 3411. Separation slot; 3402. Separation rod; 3421. Heat collection slot; 3422. Heat collection spring; 3423. Heat collection rod; 3424. Push rod; 3425. Hole slot; 3426. Medium. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] This invention proposes a fully enclosed, expandable air-cooled chassis that isolates the chassis's heat dissipation duct from the equipment installation space. The equipment installation space is designed to be fully enclosed, while the chassis interfaces are standardized, allowing for flexible combination and expansion according to functional requirements.

[0024] Example 1: Single-cell fully enclosed expandable air-cooled chassis

[0025] Please see Figure 1 and Figure 2 As shown, a fully enclosed expandable air-cooled chassis includes an upper cover 1, a lower cover 2, and a chassis 3. The upper cover 1 and the chassis 3, and the lower cover 2 and the chassis 3 are connected by screws. Each connection surface is provided with a sealing ring to achieve a watertight seal on the contact surface.

[0026] Please see Figure 2 and Figure 3 As shown, the top cover 1 has a honeycomb or strip-shaped ventilation grille 11 (4mm grille diameter, 50% opening rate) around the top. Two DB9 connector mounting interfaces are reserved in the center of the top, and four M8 bolt holes are reserved on the side (for chassis fixing). The bottom cover 2 is symmetrical to the top cover 1. The bottom has a ventilation grille 21 of the same specification around the bottom. Connector mounting interfaces and fixing bolt holes are also reserved on the bottom and sides. The upper cover 1 is connected with the frame 31 of the box body 3 through 6 M6 hexagonal screws, the lower cover 2 is connected with the frame 31 through 6 M6 hexagonal screws, the two groups of interfaces are completely consistent in size, providing a standardized connection basis for subsequent longitudinal expansion, each connection surface is embedded with a fluororubber sealing ring (hardness 70 Shore A, compression amount 30%) with a rectangular cross section, ensuring the water-tight sealing of the contact surface, and the actual measured waterproof level can reach IPX5, and the electromagnetic shielding effectiveness is greater than or equal to 40 dB (when the frequency is 100 MHz-1 GHz).

[0027] As shown in Figure 3 and Figure 5 , the heat dissipation fins 34, the box body 3 comprises a frame 31, the frame 31 is provided with a fixing interface 311 for fixing the upper cover 1 and the lower cover 2, the fixing interfaces 311 and 312 are the same in size, the inside of the four sides of the frame 31 is provided with a heat dissipation fin mounting groove 315, four heat dissipation fins 34 are mounted in the mounting groove 315, the middle area of the frame 31 is closed to form an air duct, and a sealing rope is arranged between the heat dissipation fins 34 and the frame 31 to realize sealing with the external environment. As shown in Figure 3 and Figure 6 , the box body 3 further comprises four first cover plates 32, four second cover plates 33, a fan 35 and a mounting plate 36, the four side edges of the frame 31 are provided with a first cover plate mounting interface 316 and a second cover plate mounting interface 317 outside, the first cover plate 32 is connected with the first cover plate mounting interface 316, the second cover plate 33 is connected with the second cover plate mounting interface 317, and the first cover plate 32, the second cover plate 33 and the frame 31 are all provided with a sealing rope.

[0028] As shown in Figure 3 and Figure 4 , the middle part of the case forms an air duct cavity 4, the periphery of the air duct cavity 4 is provided with a plurality of device mounting cavities 51, the vertical beams and the upper and lower plates of the frame 31 are provided with through holes, so that the device mounting cavities 51 are connected with each other, the cable interconnection requirement between devices is met, the cable can shuttle through the through hole without crossing the air duct cavity, one group of fan mounting interfaces 313 are arranged at the upper and lower ends of the middle of the frame 31 respectively for mounting the fan 35, the fan 35 is fixed on the mounting plate 36, and the mounting plate 36 is fixed with the frame 31 through the fan mounting interfaces 313.

[0029] The heat dissipation system assembly and working principle are as follows: Fan 35 fan assembly installation: the upper and lower ends of the middle of the frame 31 are respectively provided with rectangular flange-shaped fan mounting interfaces 313; the embodiment selects an axial fan 35 (model FA-150, air volume 120 CFM, air pressure 50 Pa), the fan 35 is fixed on the fan mounting plate 36 (an aluminum alloy plate with a thickness of 3 mm) through four M3 bolts, and the fan mounting plate 36 is fixed with the fan mounting interface 313 through four M5 bolts, so that the fan 35 can be detachably mounted; if the subsequent equipment heat consumption is improved to 200 W, and a fan with an air volume of 200 CFM needs to be replaced, only the fan mounting plate 36 needs to be disassembled, without the need to modify the frame 31.

[0030] Please refer to Figures 7 to 10 As shown in the figure, one side of the heat dissipation fin 34 is a heat dissipation tooth 341, and the other side is a device mounting surface 342, the size of the heat dissipation tooth 341 is determined according to the heat dissipation requirement of the device, and the mounting surface 342 is embedded with a heat pipe; the side of the heat dissipation fin 34 facing the air duct cavity 4 is integrally formed with a plurality of groups of hump-shaped heat collection bins 340, and each group of heat collection bins 340 is slidably installed with a double-layer laminated heat dissipation tooth 34; a return spring 3401 (wire diameter 1 mm, free length 20 mm, compression amount 5 mm) is connected between the middle of the heat dissipation tooth 341 and the inner wall of the heat collection bin 340; the heat dissipation tooth 341 is a double-layer laminated structure, and the upper and lower ends of the heat dissipation tooth 341 are obliquely provided with a separation groove 3411 (wide opening width 4 mm, narrow opening width 2 mm, inclination angle 15°); the heat collection bin 340 is welded with a separation rod 3402 with a diameter of 2 mm, and the separation rod 3402 is inserted into the separation groove 3411.

[0031] Please refer to Figures 8 to 10 As shown in the figure, the mounting surface 342 is uniformly provided with a heat collection groove 3421 corresponding to the heat collection bin 340, and each group of heat collection grooves 3421 is fixedly provided with a Cu-Zn-Al shape memory alloy heat collection spring 3422 (free length 15 mm, elongation to 20 mm when temperature ≥50℃) in the middle, and a copper heat collection rod 3423 with a diameter of 5 mm is slidably installed in the heat collection groove 3421; a push rod 3424 (made of 304 stainless steel, diameter 3 mm) is obliquely installed on the heat dissipation fin 34, one end of the push rod 3424 extends into the heat collection groove 3421, and the other end extends into the heat collection bin 340 and contacts the heat dissipation tooth 341; the heat collection rod 3423 contacts the push rod 3424 when sliding and pushes the heat dissipation tooth 341 to move outward of the heat collection bin 340.

[0032] The device mounting surface 342 is attached with a heat-conducting gasket (model T-flex500, thermal conductivity 3.5 W / (m・K)), and the inner wall of the heat collection bin 340 is coated with heat-conducting silicone grease (model 7921, thermal conductivity 8.5 W / (m・K)); the device mounting surface 342 and the surface of the heat dissipation teeth 341 are both provided with honeycomb-shaped holes 3425 with a hole diameter of 1.5 mm, which increases the heat dissipation area.

[0033] Working process:

[0034] Low-power working condition (device heat consumption 40W, environmental temperature 35℃): the heat collection spring 3422 is not heated and elongated, the heat dissipation teeth 341 are half-embedded in the heat collection bin 340 under the action of the return spring 3401 (the protruding length is 10 mm); the separation rod 3402 is located at the wide mouth part of the separation groove 3411, and the double-layer heat dissipation teeth 341 are attached; the fan 35 is started, the cooling airflow is sucked into the air duct cavity 4 from the ventilation grille 21 of the lower cover 2, the airflow speed is 1.2 m / s, the air resistance is 5 Pa, the airflow uniformly flows through the surface of the heat dissipation teeth 341, and the heat (the device surface temperature is 55℃) transmitted to the heat dissipation fins 34 is taken away, and finally discharged from the upper ventilation grille 11, the exhaust airflow temperature is 42℃, and the device temperature is stable at 52-55℃; High-power working condition (device heat consumption 80W, environmental temperature 40℃): the device surface temperature rises to 65℃, the heat is transmitted to the heat collection groove 3421 through the heat-conducting medium, the heat collection spring 3422 is heated and elongated to 20 mm, pushing the heat collection rod 3423 to slide; the heat collection rod 3423 pushes the push rod 3424 to move, and then pushes the heat dissipation teeth 341 to protrude to the outside of the heat collection bin 340 to 25 mm, the exposed area is increased by 150% compared with the low-power working condition; at the same time, the separation rod 3402 slides from the wide mouth of the separation groove 3411 to the narrow mouth, extruding the double-layer heat dissipation teeth 341 to expand to a 20° angle, realizing “two-sided heat dissipation→four-sided heat dissipation”; the cooling airflow enters the heat collection bin 340 through the expanded gap of the heat dissipation teeth 341, directly acting on the back of the device mounting surface 342, and improving the heat dissipation efficiency; when the device heat consumption decreases to 40W, the heat collection spring 3422 contracts, the return spring 3401 pulls the heat dissipation teeth 341 to reset, and the low-power heat dissipation state is restored.

[0035] Example 2: Multi-box longitudinal expansion air-cooled machine box

[0036] When the electronic warfare system needs to increase the device module and the single-box installation space is insufficient, the longitudinal expansion scheme is adopted: Please refer to Figure 11As shown, the expanded case includes an upper cover 1, a lower cover 2, a first box body 301, a second box body 302, and a third box body 303 (the three box body structures are consistent with the box body 3 of Embodiment 1), the box bodies are bolted through the fixed interfaces 311 of the frame 31 (M6 bolts are used), and a 5mm-thick rubber sealing ring is additionally installed on the abutting surface between the box bodies to ensure the overall airtightness of the expanded case; The air duct cavity 4 is longitudinally through (total height 1500mm), and the first fan 3501 (suction type, model FA-150) is installed at the fan installation interface 313 of the first box body 301 to balance the air resistance and the heat dissipation amount, and the second fan 3502 (blowing type, model FA-150) is installed at the fan installation interface 313 of the third box body 303 to form the air flow circulation of "lower suction and upper blowing", and the actual measurement of the air flow uniformity in the air duct cavity is improved by 30%, the temperature difference of the equipment in each box body is less than or equal to 3℃, and the heat dissipation demand of the collaborative work of multiple devices is met.

[0037] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A fully closed expandable air-cooled machine box, comprising an upper cover (1), a lower cover (2) and a box body (3), the upper cover (1) is connected with the box body (3), the lower cover (2) is connected with the box body (3), characterized in that, Also include: The heat dissipation fin (34), the box (3) includes a frame (31), the frame (311) is arranged on the fixing interface for fixing the upper cover (1) and the lower cover (2), and the fixing interface (311) is the same size as (312), the inside of the four sides of the frame (31) is provided with a heat dissipation fin mounting groove (315), four heat dissipation fins (34) are mounted in the mounting groove (315), the middle area of the frame (31) is closed to form an air duct, and a sealing rope is arranged between the heat dissipation fin (34) and the frame (31) to realize sealing with the external environment. The top of the upper cover (1) and the bottom of the lower cover (2) are provided with ventilation grilles (11), the grilles (11) are provided with mounting interfaces in position, and connectors are mounted to realize communication between the case and external equipment.

2. A fully enclosed scalable air cooled enclosure as claimed in claim 1, wherein: The box (3) further includes four first cover plates (32), four second cover plates (33), a fan (35) and a mounting plate (36), the frame (31) is provided with a first cover plate mounting interface (316) and a second cover plate mounting interface (317) outside, the first cover plate (32) is connected with the first cover plate mounting interface (316), the second cover plate (33) is connected with the second cover plate mounting interface (317), and the first cover plate (32), the second cover plate (33) and the frame (31) are all provided with sealing ropes.

3. A fully-enclosed scalable air-cooled cabinet as claimed in claim 2, wherein: The middle part of the case forms an air duct cavity (4), and the periphery of the air duct cavity (4) is provided with a plurality of device mounting cavities (51), and the vertical beams and upper and lower plates of the frame (31) are provided with through holes, so that the device mounting cavities (51) are connected with each other.

4. A fully enclosed scalable air cooled engine case as claimed in claim 1, wherein: The middle upper and lower ends of the frame (31) are respectively provided with a group of fan mounting interfaces (313) for mounting the fan (35), the fan (35) is fixed on the mounting plate (36), and the mounting plate (36) is fixed with the frame (31) through the fan mounting interface (313).

5. A fully enclosed scalable air cooled engine case as claimed in claim 1, wherein: One side of the heat dissipation fin (34) is a heat dissipation tooth (341), and the other side is a device mounting surface (342), and the mounting surface (342) is embedded with a heat pipe.

6. A fully-enclosed scalable air-cooled cabinet as claimed in claim 5, wherein: One side of the heat dissipation fin (34) is provided with a plurality of hump-shaped heat collection warehouses (340), the heat dissipation tooth (341) is slidingly mounted in the heat collection warehouse (340), and a return spring (3401) is connected between the middle part of the heat dissipation tooth (341) and the inner wall of the heat collection warehouse (340).

7. A fully-enclosed scalable air-cooled cabinet as defined in claim 6, characterized in that: The heat dissipation tooth (341) is a double-layer laminated structure, and the upper and lower ends are both inclined to be provided with separation grooves (3411), the end part of the heat collection warehouse (340) is fixedly provided with a separation rod (3402), and the separation rod (3402) is inserted into the separation groove (3411).

8. A fully-enclosed scalable air-cooled cabinet as defined in claim 7, characterized in that: The installation surface (342) is uniformly provided with heat collecting grooves (3421) corresponding to the heat collecting bin (340), the middle part of the heat collecting groove (3421) is fixedly provided with a heat collecting spring (3422), both ends of the heat collecting spring (3422) are free ends, the heat collecting groove (3421) is slidably provided with a heat collecting rod (3423), the push rod (3424) is slidably and obliquely arranged on the heat dissipation fin (34), the heat collecting rod (3423) is in contact with the push rod (3424) when sliding, and the heat dissipation tooth (341) is pushed to move outward of the heat collecting bin (340).

9. A fully-enclosed scalable air-cooled cabinet as defined in claim 8, wherein: The installation surface (342) and the heat dissipation tooth (341) are both provided with hole grooves (3425) for assisting heat dissipation.

10. A fully-enclosed scalable air-cooled cabinet as defined in claim 8, wherein: The installation surface (342) and the equipment, and the inner side of the heat collecting bin (340) are both provided with heat-conducting gaskets or heat-conducting silicone grease media (3426).

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