Integrated air duct electronic equipment cabinet and heat dissipation method thereof

Abstract

The invention relates to an integrated air duct electronic equipment cabinet and a heat dissipation method thereof, and belongs to the technical field of electronic equipment cabinets. The cabinet body comprises a framework, a side air duct, a rear air duct, a top air duct and a bottom air inlet, the framework is provided with an electronic equipment plug-in box, the side air duct is located at the rear, one side of the rear air duct is connected with an air outlet of the electronic equipment plug-in box, the other side of the rear air duct is connected with the side air duct, and the top air duct is located at the upper part and two sides of the top air duct are connected with the side air duct; the bottom of the framework is connected with the top of the uppermost rear air duct, the top air duct is connected with a centrifugal fan, a ventilation panel is arranged on the lower portion of the framework, and bottom inlet air can move forwards from the ventilation panel to form a parallel air path with a mesh panel on the upper front portion of the electronic equipment subrack. The cabinet is low in cost, and the heat dissipation method is low in noise, good in effect and capable of meeting the heat dissipation requirement of high-heating electronic equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment cabinets, and in particular to an integrated air duct electronic equipment cabinet and a heat dissipation method thereof. Background Art

[0002] With the rapid development of technologies such as information processing, big data, and AI, the functional and performance requirements for electronic equipment such as information processing boxes and high-performance servers are becoming increasingly higher. The power consumption and heat consumption of electronic equipment are also increasing accordingly. As the most commonly used physical carrier unit for electronic equipment, cabinets need to meet the continuously growing heat dissipation requirements of electronic equipment.

[0003] Air cooling has become the most widely used heat dissipation method for electronic equipment cabinets due to its convenience and cost-effectiveness. To improve air cooling capacity, increasing the fan's air pressure and air volume, or increasing the number of fans, is often employed. However, high-pressure, high-volume fans often produce high operating noise, impacting the user experience. Increasing the number of fans also increases equipment costs.

[0004] Due to the high heat dissipation requirements and high fan noise of electronic equipment, traditional electronic equipment cabinets have the following problems: From a heat dissipation perspective, traditional electronic equipment cabinets primarily have two structural types. One type features front and rear mesh doors. These cabinets lack fans and rely solely on the equipment's own fans for heat dissipation. However, these are limited in use and unsuitable for equipment with side-to-side or top-to-bottom heat dissipation. The other type features front and rear steel or glass doors. Air intake is from the bottom and exhaust is from the top. Four to six axial fans are typically installed on the top of the cabinet for exhaust. These cabinets lack cooling ducts and have a heat dissipation capacity of less than 2kW, which cannot meet the high heat dissipation requirements of current electronic equipment. 2) From a noise control perspective, traditional electronic equipment cabinets are equipped with fans both inside the equipment and in the cabinet itself to improve heat dissipation. A single cabinet can have more than 10 fans, and the combined noise from these fans can exceed 75dB(A). If multiple cabinets are placed side by side, the noise level within the equipment room can exceed 80dB(A). Daytime noise levels in industrial production areas should be less than 65dB(A), but the noise levels of traditional electronic equipment cabinets exceed these standards. Long-term work in equipment rooms can negatively impact both productivity and overall health.

[0005] 3) From a cost control perspective, for example, a certain imported brand fan has a maximum pressure of 700 Pa and a maximum air volume of 280 m³ / h. Each fan costs approximately 450 RMB. If a single cabinet is equipped with 10 fans, the cost per cabinet fan is approximately 4,500 RMB. If the product requires localization, the R&D and testing costs involved are expected to increase costs by 2-3 times. The increase in the number of fans significantly increases the proportion of cooling resource costs, which is not conducive to reducing product costs and increasing efficiency. Summary of the Invention

[0006] In order to solve the above problems and meet the market demand for high heat dissipation capacity, low noise and low cost of electronic equipment cabinets, the present invention is proposed.

[0007] The top duct is connected to the air outlet of the electronic equipment box and the top duct is connected to the air outlet of the electronic equipment box.

[0008] Furthermore, a top silencer is connected above the top air duct and outside the centrifugal fan. The top silencer includes an upper cover, a lower shell, and a mesh plate. The mesh plate is the air intake of the centrifugal fan, and the upper cover is provided with an air outlet.

[0009] Furthermore, a windshield is provided in the top-mounted silencer and is located on the wind path, so that the wind path is in a maze shape.

[0010] Furthermore, a bottom silencer is installed at the bottom air inlet.

[0011] Furthermore, the bottom silencer device includes a plurality of silencer inserts, and the silencer inserts include a mesh fixing plate and a porous sound absorbing plate.

[0012] Furthermore, there are two side air ducts, which are located on both sides of the rear of the frame.

[0013] Furthermore, the side air duct and the rear air duct are integrated into the area enclosed by the rear door and the side panels.

[0014] A heat dissipation method for an integrated air duct electronic equipment cabinet uses the aforementioned integrated air duct electronic equipment cabinet. The heat dissipation method is to have air intake at the bottom and outlet at the top, and the rear air duct, side air duct, and top air duct are combined into an integrated heat dissipation air duct. The air paths between the electronic equipment plug-ins on each layer are connected in parallel, and the bottom air inlet, the electronic equipment plug-in box, and the top fan are connected through and through.

[0015] Furthermore, cooling air is sucked in from the air inlet at the bottom of the cabinet, and part of it flows in through the bottom air inlet of the lowest electronic equipment plug-in box; the other part is sucked in from the bottom air inlet, passes through the ventilation panel, and then is sucked into the bottom air inlet of the upper electronic equipment plug-in box through the mesh panel of the lower electronic equipment plug-in box, flows out from the rear air outlet of the electronic equipment plug-in box, passes through the rear air duct and merges into the side air duct, and then is sucked into the centrifugal fan through the side air duct and the top air duct, and is discharged from the cabinet through the top silencer.

[0016] Furthermore, the air outlet of the uppermost electronic equipment plug-in box enters the rear air duct, one way enters the side air duct from both sides and then enters the top air duct, and the other way enters the top air duct from the top.

[0017] Compared with the existing technical solutions, the present invention has excellent comprehensive performance and its significant advantages are as follows: (1) A high-efficiency heat dissipation channel with downward air intake and upward air discharge is formed by a top-mounted low-noise centrifugal fan with a large air volume and an integrated air duct structure. A parallel air duct design is used between electronic equipment plug-ins to avoid heat accumulation. The heat dissipation path in the cabinet is compact, unobstructed, and has low flow resistance. The centralized heat dissipation duct concentrates the cooling air in the heat dissipation path of the electronic equipment, avoiding air volume loss caused by the chaotic cooling air flow. The overall heat dissipation efficiency of the cabinet is high, with a heat dissipation capacity of no less than 5kW, overcoming the problem of poor heat dissipation capacity of traditional cabinets and meeting the heat dissipation needs of high-heat-consuming electronic equipment.

[0018] (2) The integrated air duct structure improves the heat dissipation capacity of the electronic equipment cabinet, eliminating the need for additional fans inside the electronic equipment, thereby significantly reducing the noise source inside the cabinet. At the same time, double-layer laminated glass, high-efficiency sound insulation panels, porous sound absorption panels and other sound-absorbing materials are used to form a multi-layer noise reduction structure to effectively control cabinet noise. In addition, the top and bottom silencers can also effectively solve the problem of noise leakage at the cabinet inlet and outlet.

[0019] (3) By removing the fans inside the electronic equipment and retaining only the low-noise centrifugal fans on the top of the cabinet, the number of fans in a single cabinet can be reduced by more than 10, and the cumulative cooling resource cost can be reduced by more than 80%. If domestically produced fans are taken into account, the cumulative cost of a single cabinet can be reduced by more than RMB 10,000, and the overall research and production cost of electronic equipment cabinets will be greatly reduced.

[0020] (4) The integrated air duct structure makes full use of the empty space on the side and rear of the cabinet, does not occupy the installation space commonly used for electronic equipment, improves the space utilization rate of the cabinet, and does not need to increase the size of the cabinet. At the same time, the integrated air duct structure does not affect the rear maintenance operation of the cabinet, especially avoids the plug-in and unplugging operation space of the electronic equipment plug-in box, and has good ergonomics. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an integrated air duct electronic equipment cabinet from a side view (towards the front door).

[0022] Figure 2 This is a side view schematic diagram of the overall structure of an integrated air duct electronic equipment cabinet (front door direction, front door open state, hidden metal side panels).

[0023] Figure 3 This is a schematic diagram of the overall structure of an integrated air duct electronic equipment cabinet from a side view (front door direction, front door open state, hidden side panels).

[0024] Figure 4 This is a side view schematic diagram of the overall structure of an integrated air duct electronic equipment cabinet (rear door direction, rear door open state, hidden side panels).

[0025] Figure 5 This is a schematic diagram of the structure of the side air duct in an integrated air duct electronic equipment cabinet.

[0026] Figure 6 This is a structural diagram of the rear air duct in an integrated air duct electronic equipment cabinet.

[0027] Figure 7 This is a structural diagram of the top air duct in an integrated air duct electronic equipment cabinet.

[0028] Figure 8 This is a structural cross-sectional view of a top-mounted silencer in an integrated air duct electronic equipment cabinet.

[0029] Figure 9 The figure is a structural diagram of an electronic equipment plug-in box in an integrated air duct electronic equipment cabinet.

[0030] Figure 10 A schematic diagram of the heat dissipation method of an integrated air duct electronic equipment cabinet.

[0031] Figure 11 This is a schematic diagram of a heat dissipation method variant for an integrated air duct electronic equipment cabinet.

[0032] Among them, 1 is the cabinet.

[0033] 2 is the front door: 201 is the front door panel, and 202 is the linkage door lock.

[0034] 3 is the backdoor.

[0035] 4 is the side panel: 401 is the metal side panel, 402 is the aluminum alloy mesh panel, 403 is the porous sound-absorbing panel, and 404 is the high-efficiency sound insulation panel.

[0036] 5 is a top-mounted silencer: 501 is an upper cover, 502 is a lower shell, 503 is a wind shield, 504 is a low-noise centrifugal fan, and 505 is a circular mesh plate.

[0037] 6 is an electronic equipment plug-in box: 601 is the box body, 602 is the plug-in box windshield, 603 is the plug-in unit, and 604 is the mesh panel.

[0038] 7 is a metal frame.

[0039] 8 is a bottom silencer.

[0040] 9 is the side air duct: 901 is the front side panel, and 902 is the rear side panel.

[0041] 10 is the rear air duct.

[0042] 11 is the top air duct.

[0043] 12 is a ventilation panel. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] See also Figures 1 to 11 In an embodiment of the present invention, an integrated air duct electronic equipment cabinet includes a cabinet body 1, a front door 2, a rear door 3, two side panels 4, and a set of top-mounted silencers 5. The cabinet body 1 is the main structure of the integrated air duct electronic equipment cabinet. The cabinet body is composed of a metal frame 7, a bottom silencer 8, a set of side air ducts 9, a set of rear air ducts 10, and a top air duct 11.

[0046] The material of the metal frame 7 can be stainless steel or aluminum alloy according to different load-bearing requirements. The processing technology is to be spliced ​​or welded after bending the sheet metal. Square holes or round holes required for the installation of electronic equipment are reserved on the metal frame. The size of the square hole is generally 9.5mm×9.5mm, and the diameter of the round hole is generally 6.5mm or 4.5mm, which can be adjusted according to actual needs.

[0047] The bottom muffler 8 takes the form of a muffler louver, consisting of several muffler inserts. These inserts are composed of a mesh fixing plate and a porous sound-absorbing panel (10mm thick). The muffler inserts are oriented toward the cabinet's rear door to reduce noise transmission toward the front of the cabinet and facilitate wiring underneath the cabinet. The porous sound-absorbing panel is made of open-cell nitrile rubber foam with an absorption coefficient greater than 0.85 from 1000 to 3000 Hz. The mesh fixing plate has a 2mm aperture and a perforation ratio of 25% to 35%, achieving noise reduction within the frequency range sensitive to the human ear.

[0048] The side duct 9 consists of a front panel 901 and a rear panel 902, which are screwed to the rear sides of the metal frame 7. The front and rear panels 901 and 902 are formed by sheet metal bending and connected by screws. Rectangular holes are reserved in the front panel 901 where it connects to the rear duct 10 and the top duct 11. A porous sound-absorbing panel (10 mm thick) can be attached to the inside of the side door duct 9, depending on the required ventilation cross-section dimensions.

[0049] The rear duct 10 is constructed from 1.5mm stainless steel or 2mm aluminum alloy sheet metal, formed by bending. Its long sides are screwed to the air outlet side of the electronic device enclosure 6, while its short sides are connected to the side ducts 9 via screws. A porous sound-absorbing panel (10mm thick) can be attached to the inside of the rear duct 10, depending on the required ventilation cross-section size.

[0050] The top duct 11 is constructed from 1.5mm stainless steel or 2mm aluminum alloy sheet metal, formed by bending and welding. Its perimeter is screwed to the underside of the overhead muffler 5, and its sides are connected to the side ducts 9 with screws. Rectangular holes are reserved where the top duct 11 connects to the side ducts 9 and rear duct 10. A porous sound-absorbing panel (10mm thick) is attached to the inside of the top duct 11.

[0051] The side ducts 9, rear ducts 10, and top ducts 11 are connected with screws to form an integrated duct structure. Sealing strips should be added to the flanges connecting the ducts and tightened with screws. If necessary, sealant should be applied to the connecting edges of the ducts. After the integrated duct structure is installed, except for the reserved ventilation holes, the remaining parts must be airtight to avoid reduced ventilation efficiency and whistling noise caused by localized air leakage.

[0052] The front door 2 is secured to the front of the cabinet 1 on both sides by hinges and a linkage lock 202. The front door 2 consists of a front door panel 201 and a linkage lock 202. The front door panel 201 is the main structure of the front door 1. The linkage lock 202 is fixed to the front door panel 201 by screws and equipped with a handle. After the lock cylinder is rotated 180°, the handle automatically pops up by pressing a button, allowing the front and rear doors to be opened and closed using the handle. The linkage lock 202 can be replaced with a magnetic sealing strip and an external handle as needed, allowing for convenient opening and closing of the front and rear doors 2 and 3. The front door panel 201 typically consists of a metal frame formed by bending and welding 2mm thick stainless steel sheets and double-layer laminated glass. The double-layer laminated glass 204 utilizes a multi-layer structure of "5mm glass + 0.76mm film + 5mm glass," effectively improving the sound insulation performance of the front door 2. If there is no need for frontal observation of the cabinet, the front door panel 201 can be designed as a pure metal structure, and a noise reduction layer can be added to the inside of the front door panel 201, including a high-efficiency sound insulation board (thickness 2mm), a porous sound absorption board (thickness 20mm) and an aluminum alloy mesh board, which can further improve the sound insulation performance of the front door 2.

[0053] The two sides of the rear door 3 are fixed to the rear side of the cabinet 1 by hinges and a linkage door lock 202 respectively. The rear door 3 consists of a linkage door lock 202, a rear door panel and an internal noise reduction layer. The internal noise reduction layer of the rear door 3 has a similar structure to that of the internal noise reduction layer of the front door 2, including a high-efficiency sound insulation board (thickness 2mm), a porous sound absorption board (thickness 20mm), and an aluminum alloy mesh board. The multi-layer board structure realizes broadband and high-efficiency sound absorption and insulation within the main noise frequency range (1000~3000Hz) of electronic equipment. The linkage door lock 202 is installed on the outside of the rear door panel.

[0054] The side panel 4 is composed of a metal side panel 401 and an internal noise reduction layer. The internal noise reduction layer includes an aluminum alloy mesh panel 402, a porous sound-absorbing panel 403, and a high-efficiency sound insulation panel 404. The porous sound-absorbing panel 403 and the high-efficiency sound insulation panel 404 are adhered to the inner side of the metal side panel 401 with adhesive. The aluminum alloy mesh panel 402 is installed on the inner side of the metal side panel 401 with screws, and the porous sound-absorbing panel 403 and the high-efficiency sound insulation panel 404 are sandwiched between the aluminum alloy mesh panel 402 and the metal side panel 401.

[0055] The top-mounted silencer 5 is fixed to the top of the cabinet 1 via several screws. It consists of an upper cover 501, a lower housing 502, a windshield 503, a low-noise centrifugal fan 504, and a circular mesh panel 505. The inside of the lower housing 502 and both sides of the windshield 403 are covered with porous sound-absorbing panels (10 mm thick). The speed knob for the low-noise centrifugal fan 504 is mounted on the outside of the lower housing 502. The overall top-mounted silencer 5 forms a labyrinthine noise-reduction structure. Noise from the electronic equipment within the cabinet undergoes a secondary attenuation process during transmission, achieving noise reduction along the airflow path and preventing noise leakage at the air outlet. The speed knob is used to control the speed of the low-noise centrifugal fan 504. The speed knob is marked with a scale, which can achieve stepless control of the speed of the low-noise centrifugal fan 504 from 0 to 100%. When the heat consumption of the electronic equipment in the cabinet is low, the speed knob can be adjusted to a low speed gear. Conversely, when the heat consumption of the electronic equipment in the cabinet is high, the speed knob can be adjusted to a high speed gear to achieve real-time matching of the cabinet noise and heat consumption. Two low-noise centrifugal fans 504 can be installed in the overhead silencer 5, realizing one for use and one for backup. The low-noise centrifugal fans 504 have high air volume and high air pressure. Under normal operating conditions, both low-noise centrifugal fans 504 can be set to a low speed gear, with a heat dissipation capacity of not less than 5kW. In the event of a failure of one low-noise centrifugal fan 504, the other low-noise centrifugal fan 504 runs at full speed, also with a heat dissipation capacity of not less than 5kW.

[0056] In the information processing field, the electronic device subrack 6 commonly used in integrated air duct electronic equipment cabinets employs a VPX architecture, comprising a housing 601, a subrack air shield 602, an insert 603, and a mesh panel 604. Housing 601 is formed by splicing sheet metal, while subrack air shield 602 is formed by bending sheet metal. The heat dissipation fins of insert 603 are vertically oriented. Cooling air enters subrack 6 from the bottom, passes through the heat dissipation fins of insert 603, and is then discharged from the top. When multiple subracks are stacked, cooling air from the upper subrack is first drawn through the mesh panel 604 of the subrack below before being transferred to the interior of the subrack.

[0057] The heat dissipation method of the integrated air duct electronic equipment cabinet is bottom air intake and top air outlet. Taking the installation of three layers of electronic equipment plug-in boxes in the cabinet as an example, the heat dissipation method of the electronic equipment plug-in box 6 on the bottom layer is as follows: cooling air is sucked in from the air inlet at the bottom of the cabinet, enters the interior of the plug-in box from the air inlet at the bottom of the plug-in box, takes away the heat of the heat-generating chip through the heat dissipation fins of the plug-in unit 603, and guides the cooling air to the rear air outlet of the plug-in box through the wind shield 602 of the plug-in box. After passing through the rear air duct 10, the cooling air is divided into left and right paths and merged into the left and right side air ducts 9. Then, it is introduced upward through the side air duct 9 into the top air duct 11, and is sucked into the top silencer 5, and finally discharged from the cabinet by the low-noise centrifugal fan 504; the heat dissipation method of the electronic equipment plug-in box 6 on the second layer is as follows: cooling air is sucked in from the bottom of the cabinet After being drawn in through the inlet, the air is first directed through the ventilation panel 12 to the front of the cabinet, then through the mesh panel 604 of the bottommost subrack to the bottom inlet of the second-layer subrack. Similarly, the heat from the heat-generating chip is removed by the heat sink fins of the plug-in 603. The cooling air is then directed to the rear outlet of the subrack through the subrack windshield 602. After passing through the rear air duct 10, it is divided into left and right paths and merged into the left and right side air ducts 9. It is then directed upward through the side air duct 9 into the top air duct 11 and drawn into the top silencer 5. Finally, it is discharged from the cabinet by the low-noise centrifugal fan 504. The heat dissipation method of the third-layer electronic equipment subrack 6 is similar to that of the second-layer electronic equipment subrack, so it will not be repeated here. The rear air duct 10, side air duct 9, and top air duct 11 are combined into an integrated heat dissipation duct, which connects the cabinet bottom inlet, the electronic equipment subrack 6, and the top low-noise centrifugal fan 504. The air paths between the electronic equipment subracks 6 on each layer are connected in parallel to prevent heat accumulation. The entire cabinet forms an efficient heat dissipation channel with air intake at the bottom and air outlet at the top. The heat dissipation path is compact, unobstructed, with low flow resistance, small overall air volume loss and high heat dissipation efficiency.

[0058] The rear air duct 10 should not block the rear maintenance space of the electronic equipment plug-in box 6, especially should leave space for plugging and unplugging the rear plug-in unit 603, and should have a good ergonomic design.

[0059] After the front door 2 and the rear door 3 of the cabinet are closed, the noise of the integrated air duct electronic equipment cabinet is lower than 60dB(A).

[0060] One of the variants of the integrated air duct electronic equipment cabinet heat dissipation method is that when the internal space on both sides of the cabinet is compact, the side air duct 9 can be replaced by being installed on the cabinet rear door 3, which is the rear air duct. The overall heat dissipation method of the cabinet is similar, the difference is that after the cooling air is guided to the rear air duct 10 through the plug-in box windshield 602, it does not need to be divided into left and right paths, and directly merges into the rear air duct. Therefore, in this case, the two side structures of the rear air duct have been closed, and a rectangular hole is opened at the rear. It should be noted that when the rear door 3 is opened, the rear air duct will be disconnected from the rear air duct 10 and the top air duct 11 along with the rear door 3, resulting in the disconnection of the heat dissipation path of the integrated air duct structure. Therefore, when the rear door is opened, it should be ensured that the electronic equipment in the cabinet is turned off to avoid electronic equipment failure caused by overheating, resulting in unnecessary losses.

Claims

1. An integrated air duct electronic equipment cabinet, comprising a cabinet body, a front door, a rear door, and side panels, characterized in that: The cabinet includes a frame, side air ducts, a rear air duct, a top air duct and a bottom air inlet. Several layers of electronic equipment plug-in boxes are installed on the frame. The side air ducts are located at the rear of the frame. There are several rear air ducts, one side of which is connected to the air outlet of the electronic equipment plug-in box, and the other side is connected to the side air duct. The top air duct is located at the upper part of the frame. The two sides of the top air duct are connected to the side air ducts. The bottom of the top air duct is connected to the top of the uppermost rear air duct. The top air duct is connected to a centrifugal fan; the bottom of the electronic equipment plug-in box is an air inlet, and the rear is a heat dissipation outlet, with electronic equipment flowing in between. The upper front part of the electronic equipment plug-in box is a mesh panel, and the upper part is a non-heat dissipation outlet. The upper front part and the lower rear part are separated by a windshield; the lower part of the frame is provided with a ventilation panel, and the bottom air inlet can form an air path from the ventilation panel to the mesh panel at the upper front of the electronic equipment plug-in box.

2. The integrated air duct electronic equipment cabinet according to claim 1, characterized in that: A top silencer is connected above the top air duct and outside the centrifugal fan. The top silencer includes an upper cover, a lower shell, and a mesh plate. The mesh plate is the air intake of the centrifugal fan, and an air outlet is arranged on the upper cover.

3. The integrated air duct electronic equipment cabinet according to claim 2, characterized in that: A windshield is provided in the top-mounted silencer and is located on the wind path, so that the wind path is in a maze shape.

4. The integrated air duct electronic equipment cabinet according to claim 1, characterized in that: The bottom air inlet is equipped with a bottom silencer.

5. The integrated air duct electronic equipment cabinet according to claim 4, characterized in that: The bottom silencer device comprises a plurality of silencer inserts, and the silencer inserts comprise a mesh fixing plate and a porous sound absorbing plate.

6. The integrated air duct electronic equipment cabinet according to claim 1, characterized in that: There are two side air ducts, which are respectively located on both sides of the rear of the frame.

7. The integrated air duct electronic equipment cabinet according to claim 1, characterized in that: The side air duct and the rear air duct are integrated into an area enclosed by the rear door and the side panels.

8. A heat dissipation method for an integrated air duct electronic equipment cabinet, using the integrated air duct electronic equipment cabinet according to any one of claims 1 to 7, characterized in that: The heat dissipation method is to have air inlet at the bottom and outlet at the top; the rear air duct, side air duct and top air duct are combined into an integrated heat dissipation air duct; the air paths between the electronic equipment plug-ins on each layer are connected in parallel; the bottom air inlet, the electronic equipment plug-in box and the top fan are connected through and through.

9. The heat dissipation method for an integrated air duct electronic equipment cabinet according to claim 8, characterized in that: The cooling air is sucked in from the air inlet at the bottom of the cabinet, and part of it flows in through the bottom air inlet of the lowest electronic equipment plug-in box; the other part is sucked in from the bottom air inlet, passes through the ventilation panel, and then is sucked into the bottom air inlet of the upper electronic equipment plug-in box through the mesh panel of the lower electronic equipment plug-in box, flows out from the rear air outlet of the electronic equipment plug-in box, passes through the rear air duct and merges into the side air duct, and then is sucked into the centrifugal fan through the side air duct and the top air duct, and is discharged from the cabinet through the top silencer.

10. The heat dissipation method for an integrated air duct electronic equipment cabinet according to claim 8, characterized in that: The air outlet of the top electronic equipment plug-in box enters the rear air duct, one way enters the side air duct from both sides and then enters the top air duct, and the other way enters the top air duct from the top.

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