RU104006U1 - RADIATOR DEVICE - Google Patents

Abstract

 1. A radiator device comprising a plurality of individual radiator plates having at least first edges, at least parts of which are straight, radiator plates are fastened close to straight lines of at least parts of the first edges through at least one group of first heat-conducting gaskets to form at least at least one heat-absorbing part in contact with the external surface with the heat-generating surface of the electronic component, while the length of the radiator plates is greater than the length of the adjacent conductive gaskets, at least at the part of the radiator plates protruding beyond the ends of the first heat-conducting gaskets parts are made diverging from each other in a direction parallel to the longitudinal axes of the gaskets, protruding beyond the ends of the first heat-conducting gaskets part of the radiator plates are fastened by at least one group of second heat-conducting gaskets, length which are less than the length of the first heat-conducting gaskets. ! 2. The radiator device according to claim 1, characterized in that the first and second heat-conducting gaskets are made of different thicknesses. ! 3. The radiator device according to claim 1, characterized in that the second heat-conducting gaskets are made of different thicknesses. ! 4. The radiator device according to claim 1, characterized in that the length of the first peripheral heat-conducting gaskets at least on one side of the longitudinal axis of the heat-absorbing part is monotonically decreasing with distance from the longitudinal axis of the heat-absorbing part. ! 5. The radiator device according to claim 3, characterized in that the contour of the ends of the peripheral first heat-conducting gaskets at least

Description

The invention relates to devices for removing heat from electronic components.

Known thermal plate radiator (see US patent No. 6554060, IPC F28F 7/00, published April 29, 2003) containing a base in the form of a metal plate, on one side of which parallel slots are made in which the radiator plates are fixed. Radiator plates are formed into groups made of metals with different thermal conductivity.

The known radiator allows the use of radiator plates of cheaper metal in areas of less intense heat generation, however, requires sophisticated manufacturing technology.

Known thermal radiator device (see US patent No. 6698500, IPC F28F 7/00, published March 2, 2004) containing a base in the form of a metal plate with parallel ribs on two opposite sides. Between the inner opposite ribs in the plate, parallel slots are made in which radiator plates of metal are fixed, the thermal conductivity of which is different from the thermal conductivity of the metal of the plate and ribs.

The known radiator device provides a more intense heat sink by the central part of the radiator. A disadvantage of the known radiator is a rather complicated and laborious technology for its manufacture.

A radiator device is known (see patent RU No. 2217886, IPC Н05К 7/20, published November 27, 2003) containing a plurality of separate radiator plates bonded to each other in their connecting part to form a heat-absorbing part in contact with the surface of the electronic component that generates heat. Parts of the radiator plates opposite the heat-absorbing part are separated from each other and together form heat-removing parts. A plurality of radiator plates are fastened to each other by means of fixing means. Between the radiator plates there are many spacers, each of which is located between the connecting parts of adjacent radiator plates to provide a gap between the heat sink parts of the radiator plates.

The known radiator device allows you to collect from the same elements of the device different heat dissipation capacities, however, it has insufficient heat transfer efficiency associated with different heat dissipation of the radiator plates located in the heat-absorbing part, directly below the heat-generating element, and at a distance from it; as well as high aerodynamic resistance to air flow at the inlet and outlet of the device.

A radiator device is known (see patent RU No. 2360381, IPC H01L 23/34, published November 27, 2003) containing a plurality of individual radiator plates having at least two parallel edges and fastened near these edges through heat-conducting gaskets to each other to form, respectively heat-absorbing part in contact with the heat-generating surface of the electronic component, and heat distribution part, opposite heat-absorbing part.

In the known radiator device, the opposite part of the surface of the radiator plates is more efficiently used on the heat-absorbing part, however, when cooling powerful electronic components, the heat removal of the heat-absorbing part is insufficient. In addition, it is necessary to install separate known radiator devices over each heat-generating electronic component, which complicates the installation and increases the complexity of manufacturing electronic devices and apparatuses.

A radiator device is known (see patent RU No. 93195, IPC Н05К 7/20, published on 04/20/2010) containing a plurality of individual radiator plates having at least first edges, at least parts of which are made straight. Radiator plates are fastened together near at least direct parts of the first edges through heat-conducting gaskets to each other with the formation of a heat-absorbing part in contact with the external surface with the surface of the electronic component that generates heat. The length of the radiator plates is greater than the length of the adjacent heat-conducting gaskets. The radiator plates protruding beyond the ends of the heat-conducting gaskets are made diverging from each other in a direction parallel to the longitudinal axes of the gaskets.

In the known radiator device, its heat-absorbing part is effectively used and the balance of the hydraulic resistance of the air channel and the parameters of the air exchange device - fan are ensured. The cross section of the air channel at the inlet and outlet is larger than the cross section above the heat-absorbing part, which ensures a decrease in the hydraulic resistance of the radiator device and an increase in heat transfer due to an increase in the air flow rate over the heat-absorbing part. In addition, a smooth change in the cross section of the air flow along the length of the radiator device prevents dust from settling on the radiator plates. With natural cooling of the plates (in the absence of a fan), the implementation of part of the radiator plates diverging from each other in a direction parallel to the longitudinal axes of the gaskets creates additional air draft. However, with a significant increase in the number of divergent radiator plates, the hydraulic resistance of the peripheral parts of the radiator increases, since the radiator plates turn out to be too bent. Therefore, the radiator device has a thickness limit. In addition, it is necessary to install separate known radiator devices over each heat-generating electronic component, which complicates the installation and increases the complexity of manufacturing electronic devices and apparatuses.

The closest in technical essence and combination of essential features to the claimed technical solution is the radiator device adopted for the prototype (see patent RU No. 76767, IPC Н05К 7/20, published September 20, 2008) containing many separate radiator plates having at least two parallel edges and fastened near these edges through heat-conducting gaskets to each other with the formation of at least two heat-absorbing parts in contact with the heat-generating surfaces of the electronic components, while cial portions of fins at least on one side protrude over the distal ends of the thermally conductive gaskets disposed at opposing edges of the second fins.

The combination of the sections of the radiator plates into two or more heat-absorbing parts located above the sources of intense heat generation makes it possible to combine the radiator plates (which are directly involved in forced convective heat transfer) into a single heat circuit. However, the prototype device has a high aerodynamic resistance to air flow at the inlet and outlet of the device. In the prototype device, the radiator plates, due to the sections protruding beyond the ends of the heat-conducting gaskets, cannot be made thin and long enough so as not to lose their shape stability and mechanical strength, which leads to excessive metal consumption and, accordingly, the cost of the device increases. The use of direct radiator plates in the prototype device does not always allow to realize the optimal thermal model of the printed circuit board on which the heat-generating electronic components are mounted.

The problem that the claimed technical solution solves is the development of such a radiator device in which its shape stability would be preserved with a reduced thickness and increased length of the radiator plates, a balance of the hydraulic resistance of the air channel and the parameters of the air exchange device when realizing the thermal model of the printed circuit board on which the heat-generating devices are mounted electronic components.

The problem is solved in that the radiator device contains many individual radiator plates having at least first edges, at least parts of which are made straight. Radiator plates are fastened near at least direct parts of the first edges through at least one group of first heat-conducting gaskets to form at least one heat-absorbing part in contact with the external surface with the surface of the electronic component that generates heat. The length of the radiator plates is greater than the length of the adjacent heat-conducting gaskets. At least at the part of the radiator plates, the parts protruding beyond the ends of the first heat-conducting gaskets are made diverging from each other in a direction parallel to the longitudinal axes of the gaskets. The parts of the radiator plates protruding beyond the ends of the first heat-conducting gaskets are fastened by at least one group of second heat-conducting gaskets. The length of the second heat-conducting gaskets is less than the length of the first heat-conducting gaskets.

The fastening of the parts of the radiator plates protruding beyond the ends of the first heat-conducting gaskets by at least one group of second heat-conducting gaskets ensures the shape stability of the device even with a very small thickness and large length of the radiator plates. The absence of restrictions on the thickness and length of the radiator plates allows you to balance the hydraulic resistance of the air channel and the parameters of the air exchange device and to realize the optimal thermal model of the printed circuit board. Second heat-conducting gaskets can be used to remove heat from less powerful electronic components.

The first and / or second heat-conducting gaskets can be made of different thicknesses, which allows you to select the necessary hydraulic resistance of the air channels between the radiator plates.

The length of the first peripheral heat-conducting gaskets at least one side from the longitudinal axis of the heat-absorbing part can be made monotonously decreasing with distance from the longitudinal axis of the heat-absorbing part. This allows for a large thickness of the heat-absorbing parts to reduce the hydraulic resistance of the channels of the peripheral sections of the heat-absorbing parts of the radiator device due to the monotonous reduction in the length of the peripheral first heat-conducting gaskets.

The outline of the ends of the peripheral first heat-conducting gaskets at least on one side of the longitudinal axis of the heat-absorbing part in the plan may be in the form of a broken line facing outwardly convex or an arc shape outwardly convex.

The end edges of the peripheral second heat-conducting gaskets protruding beyond the ends of the parts of the radiator plates can be made straight, rounded, or pointed.

Radiator plates can protrude on one side or on both sides of the ends of the first heat-conducting gaskets.

The radiator plates may have second edges, in which at least parts of them are made straight and parallel to straight lines of at least parts of the first edges, while the radiator plates are fastened near the straight lines of at least parts of the second edges through at least one group of first heat-conducting gaskets and at least one group of second heat-conducting gaskets.

The first edges of the radiator plates may have first and second rectangular protrusions with which the first and second heat-conducting gaskets are fastened, respectively, while the first and second heat-conducting gaskets repeat the shape of the first and second rectangular protrusions, respectively.

The second edges of the radiator plates may have first and second rectangular protrusions, respectively opposite the first and second protrusions of the first edges, with the first and second protrusions of the second edges rectangular, the first and second heat-conducting gaskets are fastened respectively, while the first and second heat-conducting gaskets repeat the shapes of the first and second rectangular protrusions.

Radiator plates can be formed in at least two groups made of metals with different thermal conductivity.

At least one group of radiator plates can be made of copper, and at least one group of radiator plates is made of aluminum.

Radiator plates can be formed in at least two groups made of radiator plates of different thicknesses.

The first and / or second heat-conducting gaskets can be made of metals with different thermal conductivity.

The combination of the sections of the second edges of the radiator plates opposite the heat-absorbing parts allows you to combine the radiator plates (which are directly involved in forced convective heat transfer) into a single heat circuit. The greatest efficiency of the thermal circuit (and, consequently, heat transfer of the radiator device) is achieved by using a combination of materials with different thermal conductivity, of which radiator plates and heat-conducting gaskets are made. For example, copper radiator plates mounted directly under the heat-generating elements on the opposite side of them, in combination with the copper heat-conducting first gaskets, are like a second heat source, from which thermal energy is distributed through heat transfer on both sides. Thus, on the opposite side from the heat-absorbing part of the radiator device, redistribution of thermal energy from warmer radiator plates to less heated occurs. And if the material of the radiator plates in a particular radiator device cannot already be changed, then by a combination of different materials of the first and second gaskets, various specified tactical and technical characteristics (heat transfer efficiency or thermal resistance, mass, cost) of the radiator device can be achieved.

The inventive utility model is illustrated by drawings, where:

figure 1 shows a side view of the inventive device with one heat-absorbing part and one group of second heat-conducting gaskets;

figure 2 shows a front view of the inventive device depicted in figure 1;

figure 3 shows a top view of the inventive device in section along AA, shown in figure 1;

figure 4 shows a top view of the inventive device, in which the length of the first peripheral heat-conducting gaskets on both sides of the longitudinal axis of the heat-absorbing part is made monotonously decreasing;

figure 5 shows a side view of the inventive device, in which the radiator plates have second edges that are fastened through one group of the first heat-conducting gaskets and one group of the second heat-conducting gaskets;

in Fig.6 shows a front view of the inventive device shown in Fig.5;

7 shows a side view of the inventive device with a second embodiment of radiator plates;

on Fig shows a side view of the inventive device with a third embodiment of the radiator plates;

figure 9 shows a side view of the inventive device with two groups of second heat-conducting gaskets;

figure 10 shows a bottom view of the inventive device in section along BB, shown in figure 9;

11 shows a side view of the inventive device with two groups of first heat-conducting gaskets and two groups of second heat-conducting gaskets;

in Fig.12 shows a top view of the inventive device in section along BB, shown in Fig.11;

on Fig shows a side view of the inventive device device with three groups of first heat-conducting gaskets and three groups of second heat-conducting gaskets;

on Fig shows a top view of the inventive device in a section along G-D, shown in Fig.13.

The radiator device 1 for the electronic component (see Fig. 1 - Fig. 8) contains many individual radiator plates 2 having first edges 3, at least part 4 of which are made straight. Radiator plates 2 are bonded near the straight parts 4 of the first edges 3 through the first heat-conducting gaskets 5 to each other with the formation of one or more (see Fig. 12 - Fig. 14) heat-absorbing parts 6 in contact with the heat-generating surface of the electronic components (not shown shown). The straight parts 4 of the first edges 3 are flush with the outer surfaces of the first heat-conducting gaskets 5. The length of the radiator plates 2 is longer than the length of the adjacent heat-conducting gaskets 5. Radiator plates 2 can protrude on the one side or on both sides of the ends 7 of the first heat-conducting gaskets 5. Projecting for the ends 7 of the first heat-conducting gaskets 5 of the part 8, 9 of the radiator plates 2 are made at the part of the radiator plates (see Fig. 14) or at all plates except the central one (see Fig. 3, Fig. 10, Fig. 10, Fig. .12) diverging fans d from each other in a direction parallel to the longitudinal axis of the gaskets 5 and, respectively, parallel to the longitudinal axis 10 of the heat-absorbing part 6. The length of at least a portion of the peripheral first heat-conducting gaskets 5 on one or both sides of the longitudinal axis 10 can be monotonously decreasing with distance from the longitudinal axis 10 of the heat-absorbing part 6 (see figure 4). The contour of the ends 7 of the peripheral first heat-conducting gaskets 6, in this case, on one or both sides of the longitudinal axis 10 of the heat-absorbing part 6, can be in the form of a broken line facing outwardly convex or an arc shape outwardly convex. With a large thickness of heat-absorbing parts 6, such a configuration of the ends 7 of the first heat-conducting gaskets 5 reduces the hydraulic resistance of the channels of the peripheral sections of the heat-absorbing parts 6 of the radiator device 1. The protruding ends 7 of the first heat-conducting gaskets 5 of the parts 8, 9 of the radiator plates 2 are fastened by one group 11 (see Fig. .3, Fig. 4) or in several groups 11 (see Fig. 10 - Fig. 14) of the second heat-conducting gaskets 12. Bonding of parts 8, 9 of the radiator plates 2 to one group 11 or several groups 11 of the second heat conductors padding pads 12 allows you to ensure the shape stability of the device 1 even with a very small thickness and a large length of the radiator plates 2. This allows you to perform parts 8, 9 of the required length and geometry to repeat the optimal thermal model of the printed circuit board without reducing the strength and rigidity of the structure of the device 1 (see. Fig.14). Radiator plates 2 may have rounded end edges 13 (see Fig. 7) or have pointed end edges 14 (see Fig. 8). Radiator plates 2 may have second edges 15 opposite the first edges 3 (see Fig. 5, Fig. 7 - Fig. 8). At least parts 16 of the second edges 15 can be made straight and parallel to straight lines of at least parts 4 of the first edges 3. In this embodiment of the utility model, the radiator plates 2 are fastened near the straight lines of at least parts 16 of the second edges 15 through the first heat-conducting gaskets 17 to each other friend. Parts 8, 9 of the radiator plates 2 in this case are also fastened near the second edges 15 by second heat-conducting gaskets 18 (see Fig. 12 - Fig. 14). Gaskets 5, 12, 15, 18 can be bonded to the radiator plates 2 by various known methods, for example, by soldering or gluing. Since the length of the radiator plates 2 is greater than the length of the adjacent gaskets 5, 17, the minimum aerodynamic resistance to air flow is achieved due to the fact that the diverging parts 8, 9 of the radiator plates 2 that extend beyond the heat-conducting gaskets 5, 17 form an air channel (which is a set of elementary channels formed by a plurality of radiator plates 2) the cross section of which is always larger than the channel cross section directly above the heat-absorbing parts 6 of the radiator device 1. Due to this mu, the speed of the air flow at the inlet and outlet of the radiator device 1 is always less than the speed in the central part of the air channel, and hence minimal losses. The narrowing of the air occurs under the heat-absorbing parts 6 of the radiator device 1 when the air flow moves in a steady state (when the thickness and number of radiator plates 2 does not affect its speed). Therefore, disturbances (turbulence) of the air flow in the area of the heat-absorbing parts 6 lead to a significant increase in the efficiency of heat transfer with a minimum increase in aerodynamic resistance to air flow. Radiator plates 2 forming a plurality of elementary channels may have different thicknesses. Groups of thick plates 2 are located at least along the edges and provide, along with the second heat-conducting gaskets 12, 18, the mechanical strength of the radiator device 1, acting as a supporting structure. The group of thin plates 2 causes minimal disturbance (turbulence) when they are bent around by the air flow at the inlet and outlet of the radiator device 1. The protruding ends of the first heat-conducting gaskets 5, 17 of part 8, 9 of the radiator plates 2, made diverging (i.e. fan-shaped) from each other in a direction parallel to the longitudinal axes of the gaskets 5, 17 (i.e., the longitudinal axis 10 of the heat-absorbing part 6) provides a decrease in the hydraulic resistance of the radiator and an increase in heat transfer due to an increase in the speed of air sweat eye over the heat-absorbing part of the radiator. In yet another embodiment of the utility model (see FIG. 9), the straight parts 4 of the first edges 3 of the radiator plates 2 have first rectangular protrusions 19 and second rectangular protrusions 20 with which the first heat-conducting gaskets 5 and the second heat-conducting gaskets 12 are fastened. First heat-conducting gaskets 5 and the second heat-conducting gaskets 12 repeat the shape of the first rectangular protrusions 19 and the second rectangular protrusions 20, respectively. In yet another embodiment of the utility model (see FIG. 11, FIG. 13), the straight parts 16 of the second edges 15 are for the torus plates 2 have first rectangular protrusions 21 and second rectangular protrusions 22, respectively, opposite the first protrusions 19 and second protrusions 20 of the straight parts 4 of the first edges 3. The first heat-conducting gaskets 17 and the second heat-conducting gaskets are fastened respectively to the first rectangular protrusions 21 and the second rectangular protrusions 22 18. The first and second heat-conducting gaskets 17, 18 repeat the shape of the first rectangular protrusions 21 and the second rectangular protrusions, respectively 22. The radiator plates 2 can be Execute from metals with different thermal conductivities. Without changing the geometric dimensions of the radiator device 1, using thinner radiator plates 2 of various configurations, depending on the task (see Fig. 14), you can either increase the number of plates 2 (heat transfer area) or increase the gap between them, thereby increasing the effective section of an elementary air channel (space between adjacent radiator plates 2). In combination with the possibility of combining materials with different thermal conductivity, from which both radiator plates 2 and the first heat-conducting gaskets 5, 17 and second heat-conducting gaskets 12, 18 are made, the inventive radiator device 1 is a very flexible, easily reconfigurable design that allows solving problems heat transfer in complex electronic devices.

Example. The printed processor board of the unified electronic module for providing wireless Internet in railway passenger cars in an inverted form was mounted on a radiator device so that the housing of each microcircuit using heat-conducting adhesive had reliable thermal contact with the corresponding heat-absorbing part. The module volume is limited, so the height of the radiator device was 26 mm. Of 7 microcircuits, only 3 have heat dissipation power that is critical for semiconductor junctions. The radiator device had a varying gap between the radiator plates: 1.8 mm at the input and output of the radiator, and 0.8 mm under 3 cooled microcircuits. A local increase in the heat exchange efficiency of the radiator device did not cause a significant increase in the hydraulic resistance of the air flow.

Claims (19)

1. A radiator device comprising a plurality of individual radiator plates having at least first edges, at least parts of which are straight, radiator plates are fastened close to straight lines of at least parts of the first edges through at least one group of first heat-conducting gaskets to form at least at least one heat-absorbing part in contact with the external surface with the heat-generating surface of the electronic component, while the length of the radiator plates is greater than the length of the adjacent conductive gaskets, at least at the part of the radiator plates protruding beyond the ends of the first heat-conducting gaskets parts are made diverging from each other in a direction parallel to the longitudinal axes of the gaskets, protruding beyond the ends of the first heat-conducting gaskets part of the radiator plates are fastened by at least one group of second heat-conducting gaskets, length which are less than the length of the first heat-conducting gaskets. 2. The radiator device according to claim 1, characterized in that the first and second heat-conducting gaskets are made of different thicknesses. 3. The radiator device according to claim 1, characterized in that the second heat-conducting gaskets are made of different thicknesses. 4. The radiator device according to claim 1, characterized in that the length of the first peripheral heat-conducting gaskets at least on one side of the longitudinal axis of the heat-absorbing part is monotonically decreasing with distance from the longitudinal axis of the heat-absorbing part. 5. The radiator device according to claim 3, characterized in that the contour of the ends of the peripheral first heat-conducting gaskets at least on one side of the axis of the heat-absorbing part in plan has the shape of a broken line facing outwardly convex. 6. The radiator device according to claim 3, characterized in that the contour of the ends of the peripheral first heat-conducting gaskets at least on one side of the axis of the heat-absorbing part in plan has the shape of an arc facing outwardly convex. 7. The radiator device according to claim 1, characterized in that the end edges of the parts of the radiator plates protruding beyond the ends of the peripheral second heat-conducting gaskets are made straight. 8. The radiator device according to claim 1, characterized in that the end edges of the parts of the radiator plates protruding beyond the ends of the peripheral second heat-conducting gaskets are rounded. 9. The radiator device according to claim 1, characterized in that the end edges of the parts of the radiator plates protruding beyond the ends of the peripheral second heat-conducting gaskets are pointed. 10. The radiator device according to claim 1, characterized in that the radiator plates protrude on one side of the ends of the first heat-conducting gaskets. 11. The radiator device according to claim 1, characterized in that the radiator plates protrude on both sides of the ends of the first heat-conducting gaskets. 12. The radiator device according to claim 1, characterized in that the radiator plates have second edges, in which at least their parts are straight and parallel to straight lines of at least parts of the first edges, while the radiator plates are fastened near straight lines of at least parts of the second edges through at least one group of first heat-conducting gaskets and at least one group of second heat-conducting gaskets. 13. The radiator device according to claim 1, characterized in that the first edges of the radiator plates have first and second rectangular protrusions with which the first and second heat-conducting gaskets are fastened, respectively, while the first and second heat-conducting gaskets repeat the shape of the first and second rectangular protrusions, respectively. 14. The radiator device according to claim 1, characterized in that the second edges of the radiator plates have first and second rectangular protrusions, respectively opposite the first and second protrusions of the first edges, with the first and second rectangular protrusions of the second edges, respectively, the first and second heat-conducting gaskets are fastened, this first and second heat-conducting gaskets repeat the shape of the first and second rectangular protrusions, respectively. 15. The radiator device according to claim 1, characterized in that the radiator plates are formed in at least two groups made of metals with different thermal conductivity. 16. The radiator device according to 14, characterized in that at least one group of radiator plates is made of copper, and at least one group of radiator plates is made of aluminum. 17. The radiator device according to claim 1, characterized in that the radiator plates are formed in at least two groups made of radiator plates of different thicknesses. 18. The radiator device according to claim 1, characterized in that the first heat-conducting gaskets are made of metals with different thermal conductivity. 19. The radiator device according to claim 1, characterized in that the second heat-conducting gaskets are made of metals with different thermal conductivity.