RU2465751C1 - Cabinet for radioelectronic equipment - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: cabinet (1) for radioelectronic equipment in which there are submodules (8) with their own self-contained air-cooling systems is sealed and has two separate ventilation units (9 and 10). Inner partition walls form longitudinal ventilation channels from said self-contained air-cooling systems of submodules (8): on the back cover of the cabinet (2), upper (7) and lower (6) covers and the front door (2), and from the two separate ventilation units (9 and 10), respectively mounted higher and lower than the submodules (8), the inner partition walls form transverse ventilation channels vertically between housings of the submodules (8) and on the side covers (4, 5) of the cabinet. The front door (2) and covers (3,4, 5, 6 and 7) of the cabinet for radioelectronic equipment are corrugated: the front door (2), the back (3) and side covers (4 and 5) have vertical corrugations, and in the lower (6) and upper (7) covers, the corrugations lie in the direction from the front door (2) to the back cover (3), wherein all corrugations to the edges of sheets of the front door (2) and covers (3, 4, 5, 6 and 7) of the cabinet for radioelectronic equipment move into the plane of the sheets.

EFFECT: high heat removal efficiency of a sealed non-supervised cabinet for radioelectronic equipment.

2 cl, 5 dwg

Description

The invention relates to cabinet designs for accommodating various modules of electronic equipment. It can be used for special electronic equipment, for use in harsh operating conditions.

Known cabinets for placement of electronic equipment, in which cooling the latter is used forced air cooling with the intake of external cold air and the discharge of heated air from the cabinet. For example, by:

- utility model of the Russian Federation: RU 62763 dated 04/27/2007, IPC N05K 7/20, "Cabinet of electronic equipment" - [1];

- the patent of the Russian Federation: RU 2344578 dated January 20, 2009, IPC N05K 7/20, “System and method for cooling instrument and distribution cabinets” - [2];

- the patent of the Russian Federation: RU 2389058 dated 05/10/2010, IPC G06F 1/18, Н05К 7/20, “Server platform” - [3].

A disadvantage of the known analogues [1], [2] and [3] is that over time the dust and other particles in the intake air gradually settle and strongly pollute both the fans and the air ducts, and the heat exchange surfaces and elements of the electronic equipment, which may cause the latter to fail (lead to damage or destruction of electronic components). The deposition of contaminants, especially with the mobile design of the cabinet of electronic equipment, necessitates its regular cleaning and maintenance, which is not always acceptable.

It is known to perform forced air cooling with the intake of external cold air through a protective element, for example, according to the “Fan cooling device” according to the patent of the Russian Federation: RU 2378808 dated 01/10/2010, IPC Н05К 7/00 - [4]. Also known nodes filtering the intake of cold air, for example by:

- the patent of the Russian Federation: RU 2342567 dated 12/27/2008, IPC F04D 29/70, Н05К 7/20, Н02ВК 1/56, “Device for air passage” -

[5];

- the patent of the Russian Federation: RU 2343323 dated January 10, 2009, IPC F04D 29/70, Н05К 7/20, H02BF 1/20, “Filter fan with a device for quick fastening” - [6].

A disadvantage of the known analogues [4], [5] and [6] is that the filtering element of the inlet air is strongly polluted over time by dust and other particles in the intake air, as a result of which the aerodynamic resistance of the filtering elements increases and, as a result, the amount decreases incoming cooling air. As a result, overheating of electronic equipment and its failure can occur. For normal operation of electronic equipment requires regular cleaning or replacement of filter elements, which dramatically increases the cost of operation and is not always acceptable. In addition, it is necessary to know the exact clogging time of the filter element, which is almost very difficult. As a result, the reliability of the operation of the cabinet of electronic equipment is sharply reduced. There is a need to additionally install sensors for recording airflow reduction, but this does not eliminate the need for timely replacement of the filter element.

The well-known "Housing of electronic equipment" according to the utility model of the Russian Federation: RU 42148 dated 11/20/2004, IPC N05K 5/00, N05K 7/00, N05K 7/20 - [7], containing connectors and a supporting frame, on the inner surfaces the upper and lower panels of which are made guides for removable blocks, and on the outer surfaces there are heat-removing ribs, while the supporting frame is equipped with additional heat-removing ribs on the outer surfaces of the side panels, while guides for heat-removing elements are made between the heat-removing ribs refrigerant.

The well-known "Radioelectronic unit" according to the patent of the Russian Federation: RU 2380866 from 01/27/2010, IPC N05K 7/00, N05K 7/20, N05VK 1/19 - [8], containing modules connected by a backplane located on the inside sides of the rear panel of the block housing parallel to its surface, the modules are connected by at least two backplanes and through connectors of the modules, and the heat-loaded and non-heat-loaded modules are located at a distance from each other.

The well-known "Cabinet of electronic equipment" according to the utility model of the Russian Federation: RU 17107 dated 03/10/2001, IPC Н05К 7/20 - [9], comprising a housing, plates located one above the other and forming horizontal sections in which removable blocks are placed electronic equipment, a heat sink system of plates connected to the rear wall of the cabinet, while the plates and the rear wall of the cabinet are made of heat-conducting material, fasteners for the heat sink plate with additional means are installed on the outside of the rear wall of the cabinet E cooling on its exterior side (fin, forced air cooling means or water cooling means).

Also known as “Cabinet of electronic equipment” according to the patent of the Russian Federation: RU 2338345 dated 10.11.2008, IPC Н05К 7/20 - [10], comprising a housing with a rear wall, plates or plates of highly conductive material, located one above the other and forming horizontal sections for the placement of electronic equipment, a heat sink system consisting of heat pipes brought into heat contact with plates of highly heat-conducting material in the region of the heat pipe evaporation zone and the back wall of the cabinet, also made of high pipe material, on the outside of which a condensation zone of heat pipes is fixed.

The disadvantages of analogues [7], [8], [9] and [10] are that in the process of heat removal from electronic equipment only heat conduction and natural convection processes are used and forced ventilation inside the case is not used, which reduces the efficiency of its functioning. In addition, the use of heat-conducting plates, fins and heat exchangers significantly increases the weight of the structure, requires the production of expensive materials, which increases the cost of such products. The analogue [10] is equipped with a forced ventilation system, but outside the cabinet, and this external forced ventilation there are inherent disadvantages of the analogs [1], [2] and [3], in addition, the use of heat pipes complicates the heat sink system of the cabinet of electronic equipment and significantly increases its cost .

The prototype of the proposed technical solution is the “Cabinet of electronic equipment” according to the utility model of the Russian Federation: RU 89799 dated 12/10/2009, IPC N05K 7/20 - [11], containing partitions, and a forced air cooling system inside the cabinet, and installed in it submodules in the form of rectangular parallelepipeds with their own autonomous air-cooling systems.

The disadvantage of the prototype [11] is that its ventilation is made open with the intake of external air, and therefore it has all the disadvantages of the analogs [1], [2] and [3], and the use of only its own autonomous air cooling systems installed submodules does not allow efficient and maximize the possibilities of heat removal through all the walls of the cabinet of electronic equipment.

The indicated drawbacks of the analogues and the prototype set the task of creating a highly efficient heat-tight sealed maintenance-free cabinet of electronic equipment, with submodules installed in it (for example, in the form of rectangular parallelepipeds) with their own autonomous air-cooling systems.

The problem is solved in that in a cabinet of electronic equipment with internal partitions, and with forced air cooling inside the cabinet, and submodules installed in it with its own autonomous air cooling systems, it is sealed, contains two separate ventilation units, internal partitions from its own autonomous air systems cooling of submodules form longitudinal ventilation ducts: along the rear panel of the cabinet, its upper and lower panels and the front door, and from two from individual ventilation blocks of the cabinet, installed respectively above and below the submodules, the internal partitions form transverse ventilation ducts: vertically between the submodule enclosures and along the side panels of the cabinet. The casing of the cabinet of electronic equipment can be made corrugated: the front door, rear and side casing are made with vertical corrugations, and in the lower and upper casing corrugations are located in the direction from the front door to the rear casing, and all corrugations to the edges of the sheets of the front door and casing of the cabinet electronic equipment made passing into the plane of the sheets.

The introduction into the claims of the sign “cabinet of electronic equipment is sealed” is necessary in order to ensure its long-term operation without maintenance, by eliminating contamination of the components of electronic equipment by dust and other particles from the outside air. This will allow the use in the inventive device of electronic equipment for special purposes and to use it in harsh operating conditions.

Introduction to the claims of the invention: “the internal partitions from their own autonomous air cooling systems of the submodules form longitudinal ventilation ducts: along the back paneling of the cabinet, its upper and lower panels and the front door, and from two separate ventilation blocks of the cabinet installed respectively above and below the submodules, internal partitions form transverse ventilation ducts: vertically between the submodule casings and along the side paneling of the cabinet ”, it is necessary in order to organize maximum th heat dissipation generated during the operation of the submodules through all the casing of the cabinet and its front door. The separation of cooling air into two streams allows more efficient heat sink from submodules, without disrupting the operation of their own autonomous air cooling systems.

Introduction to the claims of the invention: “the front door and the casing of the electronic equipment cabinet are corrugated: the front door, the rear and side casing are made with vertical corrugations, and in the lower and upper casing the corrugations are located in the direction from the front door to the rear casing”, it is necessary for in order to significantly increase the external surface area of the cabinet and, therefore, create the possibility of installing more powerful electronic equipment in the cabinet, without additional energy costs for cooling it eniya. The direction of the corrugations on the casing of the cabinet and its door corresponds to the direction of the cooling air flows, in order to minimize aerodynamic losses during their movement through the channels and to prevent mixing of these flows, due to increased turbulence.

Introduction to the formula of the invention, the sign: “all corrugations to the edges of the sheets of the front door and the casing of the electronic equipment cabinet are made turning into the plane of the sheets”, it is necessary to simplify the process of assembling the cabinet of electronic equipment, since the flat edges of its casing and doors are much easier to connect and seal.

Figure 1 schematically shows a cabinet of electronic equipment with longitudinal and transverse flows of air cooling; figure 2 is a view of the cabinet of electronic equipment on the left and front without side, rear skins and doors; figure 3 is a view of a cabinet of electronic equipment on the right and rear without side, rear skins and doors; figure 4 is a photo of the ventilation unit; figure 5 is a photo of the cabinet without installed equipment.

Cabinet 1 of the electronic equipment contains a front door of the cabinet 2, a rear panel 3, side panels 4 and 5, a lower panel 6 and a top panel 7. Inside the cabinet 1 there are perforated shelves (not shown) for submodules 8 with their own autonomous forced air cooling systems (for example , in the form of rectangular parallelepipeds), the direction of air movement in which is directed from the front door to the rear skin. Below the submodules 8 there is a ventilation unit 9 with discharge fans, and above the submodules 8 there is a ventilation unit 10 with exhaust fans.

Below the ventilation unit 9 with equal gaps from block 9, the lower skin 6, the front door 1 and the rear skin 3, a solid partition 11 (lower) is installed, and above the block 10, a solid partition 12 (upper), which has a rear cabinet door 2, is installed similarly casing 3, lower casing 6 and upper casing 7 form longitudinal ventilation ducts for the cooled air driven by its own autonomous systems of forced air cooling submodules 8.

Partitions 11 and 12 are installed in the joint, respectively, of the side skins 4 and 5, through the seals. Partitions 11 and 12 with the (external) lateral sides of the submodules 8 and ventilation units 9 and 10 are connected by vertical partitions 13 (left) and 14 (right), which are located with the same gaps from the ventilation units 9 and 10. The vertical internal partitions 13 and 14 below and above the ventilation units 9 and 10 contain perforations - openings for the passage of air driven by the ventilation units 9 and 10. The vertical internal partitions 13 and 14 together with the side panels 4 and 5, as well as the partitions 11 and 12 form transverse air vents nnye channels for cooled air that drives the fan unit 9 and 10.

The direction of the cooling air flows 15 in the longitudinal ventilation ducts in Fig. 1 is shown by thick arrows, and the cooling air flows 16 in the transverse by thin arrows. The corrugations on the front door 2 and the casing 3, 4, 5, 6, 7 are not shown in FIGS. 1, 2, 3, 4 and 5.

The proposed cabinet of electronic equipment operates as follows.

During operation of submodules 8 located in the cabinet 1, heat is released, which of them is transferred to the air stream using its own cooling systems. The combined air flow from the own cooling systems of each of the submodules 8 is directed to the rear casing 3, by which it is divided into two vertical flows (top and bottom) and along the longitudinal ventilation ducts formed by solid partitions 11, 12, 13 and 14, the air flow through the upper, lower casing and the cabinet door is sent again to the input of its own systems of refrigerated cooling systems of each of the submodules 8.

With the passage of air stream 15 heated in submodules 8, through the rear 3, upper 7, lower 6 skins and along the front door 2, it gives them its heat and cools itself. The heat of the front skin 3, 7, 6 and door 2 is transferred by heat conduction to the outer surface of the cabinet 1, from where it is transferred to the outside air and, by natural convection, is removed from the cabinet of the electronic equipment.

In addition, heat from the submodule bodies 8 is removed by the cooling vertical air stream 16 created by the ventilation units 9 and 10, from which the air stream 16 is directed into the transverse air channels formed by the partitions 13 and 14 together with the side panels 4 and 5, as well as the partitions 11 and 12 . In this case, heat is removed from the cabinet through the side panels 4 and 5.

The applicant carried out the development of the proposed technical solution, which corresponds to GOST 21676-2000. At the same time, the problem of efficient cooling of high-power modules located in the cabinet of electronic equipment was additionally solved. So the tests have confirmed the possibility of implementing a mobile, operated in harsh conditions, maintenance-free cabinet electronic equipment with heat more than 5 kW per cubic meter of cabinet volume.

The proposed cabinet of electronic equipment is optimally compatible with the modules of electronic equipment at the system level, using the main-modular design principle, providing the possibility of interchangeability during modernization of equipment in operating conditions. It has high reliability, provides strength, durability and resistance to external factors. As a result, an increase in the consumer properties of the device and a more complete satisfaction of the interests of customers are achieved. The documentation for the developed cabinet for compatibility with modules of electronic equipment complies with GOST 52003-2003. This ensures optimal compatibility of electronic equipment at the system level in terms of design, strength, electrical, electromagnetic parameters, including interfaces and electrical installation. The cabinet of electronic equipment can be made in size both in the metric system according to the GOST R 50756 series and in the inch system according to the IEC 60297 series of standards.

We believe that the proposed device has all the criteria of the invention, since:

- the cabinet of electronic equipment in conjunction with the restrictive and distinctive features of the claims is new to well-known devices and, therefore, meets the criterion of "novelty";

- the totality of the features of the claims of the device is not known at this level of technology and does not follow well-known rules for the design of cabinets of electronic equipment, which proves compliance with the criterion of "inventive step";

- the constructive implementation of the cabinet of electronic equipment does not present any structural, technical and technological difficulties, which implies compliance with the criterion of "industrial applicability".

Literature:

1. Utility model of the Russian Federation: RU 62763 dated 04/27/2007, IPC N05K 7/20, “Cabinet of electronic equipment”.

2. Patent of the Russian Federation: RU 2344578 dated January 20, 2009, IPC N05K 7/20, “System and method for cooling instrument and distribution cabinets”.

3. Patent of the Russian Federation: RU 2389058 dated 05/10/2010, IPC G06F 1/18, Н05К 7/20, “Server platform”.

4. Patent of the Russian Federation: RU 2378808 dated 01/10/2010, IPC N05K 7/00, “Fan cooling device”.

5. Patent of the Russian Federation: RU 2342567 dated 12/27/2008, IPC F04D 29/70, Н05К 7/20, Н02ВК 1/56, “Device for air passage”.

6. Patent of the Russian Federation: RU 2343323 dated January 10, 2009, IPC F04D 29/70, Н05К 7/20, H02BF 1/20, “Filter fan with a device for quick fastening”.

7. Utility model of the Russian Federation: RU 42148 dated November 20, 2004, IPC N05K 5/00, N05K 7/00, N05K 7/20, “Housing of electronic equipment”.

8. Patent of the Russian Federation: RU 2380866 dated January 27, 2010, IPC N05K 7/00, N05K 7/20, N05VK 1/19, “Radio-electronic unit”.

9. Utility model of the Russian Federation: RU 17107 dated 03/10/2001, IPC N05K 7/20, “Cabinet of electronic equipment”.

10. Patent of the Russian Federation: RU 2338345 dated November 10, 2008, IPC N05K 7/20, “Cabinet of electronic equipment”.

11. Utility model of the Russian Federation: RU 89799 dated 12/10/2009, IPC N05K 7/20, “Cabinet of electronic equipment” - prototype.

Claims (2)

1. The cabinet of electronic equipment with internal partitions, and with forced air cooling inside the cabinet, and submodules installed in it with their own autonomous air cooling systems, characterized in that the cabinet is sealed and contains two separate ventilation units, the internal partitions form longitudinal ventilation ducts from own autonomous air cooling systems of submodules: on the back paneling of the cabinet, its upper and lower panelings and the front door, and from two separate of ventilation units installed respectively above and below the submodules, the internal partitions form transverse ventilation ducts: vertically between the submodule enclosures and along the side panels of the cabinet. 2. The cabinet of electronic equipment according to claim 1, characterized in that the front door and the casing of the cabinet of electronic equipment are corrugated: the front door, rear and side casing are made with vertical corrugations, and in the lower and upper casing corrugations are located in the direction from the front door to the rear skin, and all the corrugations to the edges of the sheets of the front door and the skin of the cabinet of electronic equipment made passing into the plane of the sheets.

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