CN105070696B - A kind of minitype radiator of column phyllotaxy arrangement deployed configuration - Google Patents

Abstract

The invention belongs to the technical field of a miniature radiator used for heat dissipation of electronic components, and relates to the structural design problem of the heat dissipation column (or pin column) of the miniature radiator arranged in phyllosequence. The miniature radiator is composed of a heat dissipation bottom plate and a heat dissipation column. The arrangement of the heat dissipation columns of this microradiator meets the planar expansion form of the Van Iterson model of the phyllotaxy theory in biological sciences, which makes the heat dissipation of the working surface of the microradiator The pillars realize the maximum filling and complementarity of the geometric positions, and form a reasonable space air flow channel, thereby improving the heat dissipation efficiency of the micro radiator.

Description

A micro radiator with columnar phyllotaxy arrangement and unfolding structure

technical field

The invention belongs to the technical field of miniature radiators, and is a novel miniature radiator with a bionic structure. The biggest difference between this micro-radiator and other micro-radiators is that the arrangement structure of radiating columns (or needle columns) presents a circular expansion form of cylindrical phyllotaxy arrangement on the end surface of the radiator base. The miniature heat sink is mainly used in the heat dissipation process of microelectronic components, semiconductor components and other micro components, which can effectively reduce the surface temperature of components, improve the service life and work efficiency of components, and play an important role in the development of electronic components. has important meaning.

Background technique

With the continuous improvement of the integration and performance of electronic components and the continuous reduction of its physical size, the heat flux of electronic components has increased sharply, and its surface heat flux is as high as ~ The heat dissipation problem has become one of the main factors restricting the performance improvement of microelectronic components and equipment, and has become one of the important research directions in the field of fluid mechanics and heat transfer. Conventional radiators use aluminum or copper plate-fin radiators and pin-column radiators, and the way of adding fans relies on the forced convection heat transfer method of single-phase fluid. These are currently unable to meet the needs of stable operation of electronic components, especially with the reduction of the internal heat dissipation space of components or electronic equipment, it is no longer possible to use conventional heat dissipation methods, and the structure of the radiator must be changed to improve the performance of electronic components. cooling capacity.

Therefore, the present invention is based on the theory of phyllotaxy in biological sciences. The phyllotaxy theory of biology shows that the geometric arrangement of leaves, petals, and fruit grains of plants satisfies the law of the golden section, and realizes the maximum filling and complementarity of regions in geometric space. The arrangement of the grains of some of these organisms can form clockwise and counterclockwise leaf alignment spirals, and corresponding spiral grooves are also created between the grains. This arrangement is applied to the heat sink, which can increase the heat dissipation area of the heat sink. The spiral grooves formed between the heat dissipation columns (or pin columns) are conducive to the flow of air under the action of the fan and improve the heat dissipation efficiency. Therefore, according to this theory, the heat dissipation column arrangement structure of the micro radiator with columnar phyllotaxy arrangement and expansion structure designed on the end surface can improve the heat dissipation efficiency of the micro radiator.

Contents of the invention

The purpose of the present invention is to provide a micro-radiator with a columnar phyllotaxy arrangement and expansion structure. The present invention is based on the plane expansion form of the Van Iterson model of the biological phyllotaxy theory to design the end face columnar phyllotaxy arrangement and expansion structure. Micro radiator.

The technical solutions adopted are:

A micro-radiator with a columnar phyllotaxy arrangement and unfolded structure, comprising a heat dissipation bottom plate and a plurality of heat dissipation columns, characterized in that:

Multiple heat dissipation columns are fixed vertically on the upper surface of the heat dissipation base plate, and the arrangement of multiple heat dissipation columns on the heat dissipation base plate conforms to the planar expansion form of the Van Iterson model of the biological phyllotaxy arrangement theory, and its expansion in the XOZ coordinate system in the form: , ; that is, in the XOZ coordinate system, n is the arrangement number of the cooling columns, is the radius of the parent cylinder in the Van Iterson model, and is a constant value; c is the distribution constant in the z-axis direction of the cooling column in the XOZ coordinate system, and the unit is mm; x and z are the position coordinates of the nth cooling column on the XOZ coordinate system; is the polar coordinate angle between the nth heat dissipation column and the n +1th heat dissipation column on the expanded parent cylinder on the polar coordinate plane, and In order to satisfy the golden section angle; m is the ordinal number controlling the position of the nth cooling column in the x -axis direction in the XOZ coordinate system.

Design Concept:

The cylindrical phyllotaxy arrangement structure is the result of the evolutionary selection of organisms in nature to adapt to the environment. It enables the grains to achieve maximum filling and position complementarity in geometric space, and the arrangement of grains forms a family of clockwise grain-leaf alignment helices and A family of counterclockwise grain-leaf collinear helices. When the cylindrical phyllotaxy is expanded to a planar structure, the characteristics of the columnar phyllotaxy are still preserved.

When designing a micro-radiator with a columnar phyllotaxy arrangement on the end surface, if each heat dissipation column (or needle column) is regarded as a seed, then the arrangement of the heat dissipation columns on the end surface of the radiator bottom plate can be arranged in order The theory is carried out in the planar expanded form of the Van Iterson model. The expansion form in the XOZ coordinate system is: , ; that is, in the XOZ coordinate system, n is the arrangement number of the cooling columns, is the radius of the parent cylinder in the Van Iterson model, and is a constant value; c is the distribution constant in the z-axis direction of the cooling column in the XOZ coordinate system, and the unit is mm; x and z are the position coordinates of the nth cooling column on the XOZ coordinate system; is the polar coordinate angle between the nth heat dissipation column and the n +1th heat dissipation column on the expanded parent cylinder on the polar coordinate plane, and In order to satisfy the golden section angle; m is the ordinal number controlling the position of the nth cooling column in the x -axis direction in the XOZ coordinate system. In this way, the heat dissipation columns of the micro radiator with columnar phyllotaxy arrangement on the end surface realize the golden section arrangement in geometric position, achieve maximum filling and position complementarity, and form clockwise and counterclockwise heat dissipation column leaves between the heat dissipation columns. Alignment spiral groove air channel, under the action of the fan, improves the heat dissipation efficiency.

Description of drawings

Figure 1 is a diagram of the phyllotaxy structure arrangement of pineapple and pine cones.

1 in Fig. 1 is a grain, 2 is a counterclockwise grain-leaf collinear helix, and 3 is a clockwise grain-leaf collinear helix.

Figure 2 is the expanded form diagram of the Van Iterson model of the phyllotaxy structure arrangement of pineapple and pine cone seeds under the XOZ coordinate system.

4 in Figure 2 is the grain point, 5 is the clockwise grain point leaf alignment spiral, 6 is the counterclockwise grain point leaf alignment spiral, 7 is the nth grain point, 8 is the n+1th grain point, 9 is the n+2th grain point, 10 is the leaf line spiral groove between the clockwise grain points, and 11 is the leaf line spiral groove between the counterclockwise grain points.

Fig. 3 is a structural schematic diagram of an embodiment of a micro-radiator with columnar phyllotaxy arrangement and unfolding structure of the present invention.

12 among Fig. 3 is the radiating bottom plate of miniature radiator, and 13 is radiating post.

Fig. 4 is a graph showing the influence of the first type of distribution constant c on the arrangement state of the cooling columns.

Fig. 5 is a diagram showing the influence of the second distribution constant c on the arrangement state of the cooling columns.

Fig. 6 is a diagram showing the influence of the third distribution constant c on the arrangement state of the cooling columns.

Fig. 7 is a diagram showing the influence of the fourth type of distribution constant c on the arrangement state of the cooling columns.

Fig. 8 is a graph showing the influence of the fifth distribution constant c on the arrangement state of the cooling columns.

detailed description

A micro radiator with a columnar phyllotaxy arrangement and unfolded structure, comprising a heat dissipation bottom plate 12 and a plurality of heat dissipation columns 13, characterized in that:

The thickness H of the cooling base plate 12 is 1-3 mm, and the cooling base plate 12 is rectangular or square; the diameter d of the cooling column 13 is 1-3 mm, and the height h of the cooling column is 3-18 mm. The area ratio of the end surface of the bottom plate is 35% to 60%; a plurality of cooling columns 13 are vertically fixed on the upper surface of the cooling bottom plate 12, and the arrangement of the plurality of cooling columns 13 on the upper end surface of the cooling bottom plate 12 conforms to Van Iterson’s phyllotaxy arrangement theory. The plane expansion form of the model;

Its expanded form in the XOZ coordinate system is: , ; That is, under the XOZ coordinate system, n is the arrangement number of the grains, is the radius of the parent cylinder in the Van Iterson model, and is a constant value; c is the distribution constant of the grain in the z-axis direction of the XOZ coordinate system, which is 0.3-0.9 mm; x and z are the position coordinates of the nth grain on the XOZ coordinate system; is the polar coordinate angle between the nth grain and the n +1th grain on the expanded parent cylinder on the polar coordinate plane, and To satisfy the golden section angle; m is the ordinal number controlling the position of the nth grain in the x -axis direction under the XOZ coordinate system.

A kind of preparation method of the miniature radiator of columnar phyllotaxy arrangement unfolding structure of the present invention is:

1) Use CAD software to design the bottom plate 12 in Figure 3 according to the requirements of the object to be radiated. The thickness of 12 is selected at 1-3 mm, and it is determined to be a rectangle or a square. The length and width of 12 are determined by the size of the object to be radiated, and at the same time determine the radius R of the expanded parent cylinder.

2) According to the expanded form diagram of the Van Iterson model in the XOZ coordinate system in Figure 1 and Figure 2, one corner of the bottom plate 12 in Figure 3 is used as the heat dissipation column to arrange the origin of the coordinates in the XOZ coordinate system, and use CAD The software designs the phyllosequence arrangement pattern of the cooling columns 13 in FIG. 3 .

3) Design the structure and size of the base body of the cooling column 13 arranged in phyllosequence. As shown in Figure 3, the heat dissipation column (or needle column) is cylindrical, the diameter d of the cylinder is controlled within the range of Ф1mm to Ф3mm, and the height h of the heat dissipation column is selected within the range of 3d to 6d.

4) By changing the distribution constant c in the expanded form of the Van Iterson model, the arrangement form of the heat dissipation columns under different distribution constants can be obtained. By controlling the value of c , the ratio of the total cross-sectional area of the heat dissipation column 13 to the end surface area of the bottom plate 12 is controlled within a range of 35% to 65%. According to the distribution of cooling columns under different distribution constants c in Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, it can be seen that the distribution constant c affects the density of the cooling columns, and the larger the value of c , the more dense the cooling columns are arranged. sparse. The value range of c is 0.3 ~ 0.9mm.

If the thickness H of the base plate 12 is 3 mm, the base plate 12 is determined to be a square with a length and a width of 30 mm, then the radius of the expanded matrix is 4.78 mm, the diameter of the cooling column 13 is Ф3 mm, and the height h of the cooling column 13 is 15 mm, choose c The distribution constant in the Z direction is 0.45 mm, and the ratio of the total cross-sectional area of the plurality of cooling columns 13 to the end surface area of the bottom plate 12 is 52.3%.

Claims (1)

1. a kind of minitype radiator of column phyllotaxy arrangement deployed configuration, including radiating bottom plate and multiple thermal columns, its feature exist In：

Multiple thermal columns are vertically fixed on the upper surface of radiating bottom plate, and arrangement of multiple thermal columns on radiating bottom plate meets life The planar development form of the theoretical Van Iterson models of the phyllotaxy arrangement of thing, itsXOZExpanded form under coordinate system For： ,； ExistXOZUnder coordinate system,nIt is the arrangement ordinal number of thermal column,RFor the radius of parent cylinder in Van Iterson models, andRIt is One constant value；cBeXOZDistributed constant under coordinate system on thermal column z-axis direction, unit mm；xWithzRespectivelynIt is individual Thermal column existsXOZPosition coordinates on coordinate system；To be unfolded on parent cylindernIndividual thermal column andn+ 1 thermal column it Between polar coordinates angle on polar coordinates face, and to meet golden section angle；mFor control thenIndividual thermal column existsXOZUnder coordinate systemxThe ordinal number of position on direction of principal axis, radiating column diameter d be 0.5~3mm, and the pillar height h that radiates is 3~18mm, described distributed constantc For 0.3~0.9mm, the cross-sectional area sum of thermal column is 35~65% with the area ratio of minitype radiator operative end surface, bottom Plate is rectangular or square, and the thickness H of bottom plate is 1~3mm.