Heat dissipation structure of host

Abstract

The heat dissipation structure comprises a shell internally provided with a containing cavity, and shell ventilation holes are formed in the top face, the bottom face and the side faces of the shell; a mounting base is mounted in the containing cavity, a centrifugal fan is horizontally mounted on one side of the top of the mounting base, air inlets of the centrifugal fan are located in the upper surface and the lower surface, parallel to the top surface of the mounting base, of the centrifugal fan, and air outlets of the centrifugal fan are located in the side face perpendicular to the top surface of the mounting base and facing the other side of the top of the mounting base; a plurality of radiating fins perpendicular to the air outlet are arranged on the other side of the top of the mounting seat in parallel at intervals; the faces, opposite to the air outlets, of the heat dissipation fins right opposite to the air outlets in the multiple heat dissipation fins are inwards concave to be arc faces in the vertical direction. The heat dissipation efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the field of computer host, in particular to a heat dissipation structure of the host. Background Art

[0002] With the continuous development of computer technology, the process of computer miniaturization continues to deepen, and the emergence and promotion of mini computers have become an inevitable trend in the computer field. In the prior art, due to the small overall size of mini computers, a large amount of heat will be generated during the operation of the host, especially the electrical components on the motherboard and various processing chips such as CPU, GPU, etc., which often do not have too high heat resistance, and are easily damaged if they run in a high temperature environment for a long time. In the existing host, its heat dissipation structure cannot better form the convection of cold and hot air, which will cause heat accumulation in some parts of the motherboard, and the heat dissipation efficiency is not high. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides a heat dissipation structure of a host.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a heat dissipation structure of a host, comprising a shell with an accommodating cavity arranged inside, the top surface, bottom surface and side surface of the shell are all provided with shell ventilation holes; a mounting seat is installed in the accommodating cavity, a centrifugal fan is horizontally installed on one side of the top of the mounting seat, the air inlet of the centrifugal fan is located on the upper and lower surfaces of the centrifugal fan parallel to the top surface of the mounting seat, and the air outlet of the centrifugal fan is located on the side perpendicular to the top surface of the mounting seat and facing the other side of the top of the mounting seat; a plurality of cooling fins perpendicular to the air outlet are arranged in parallel at intervals on the other side of the top of the mounting seat; a side opposite to the air outlet on the cooling fins directly facing the air outlet among the plurality of cooling fins is concave in the vertical direction to be an arc surface.

[0005] Preferably, the air outlet is a trumpet-shaped structure.

[0006] Preferably, there is a gap between the lower surface of the centrifugal fan and the top surface of the mounting seat.

[0007] Preferably, a plurality of foot pads are arranged on the bottom surface of the shell at equal intervals around the shell ventilation holes.

[0008] Preferably, a temperature averaging plate with a T-shaped structure is provided at the bottom of the mounting base at a position corresponding to the heat sink fins.

[0009] Preferably, ventilation ducts for ventilation are provided at two opposite cavity walls in the accommodating cavity which are parallel to the heat dissipation fins.

[0010] Preferably, the blade thickness of the centrifugal fan is 0.30-0.40 mm.

[0011] Preferably, the interval between two adjacent heat dissipation fins is 0.9-1.1 mm, and the thickness of the heat dissipation fins is 0.15-0.25 mm.

[0012] Preferably, the housing ventilation holes on the top surface of the housing and the housing ventilation holes on the bottom surface of the housing are ventilation holes of different shapes.

[0013] Preferably, the air inlet on the lower surface of the centrifugal fan includes a plurality of arc-shaped air outlets arranged at equal intervals along a circle.

[0014] The beneficial effects of the present invention are as follows: the present invention ensures that external cold air can effectively enter the containing cavity of the shell through the air inlets on the top and bottom surfaces of the shell, and at the same time utilizes the centrifugal fan to realize the flow of cold and hot air in the containing cavity. The concave arc surface of the heat dissipation fins optimizes the spacing between the air outlet of the centrifugal fan and the heat dissipation fins, reduces the difference in air volume obtained by each heat dissipation fin, improves the temperature non-uniformity of the heat dissipation fins, and maximizes the heat dissipation efficiency of the heat dissipation fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the structure of the top of an embodiment of the present invention;

[0016] Figure 2 is a schematic structural diagram of the bottom of an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the structure of the accommodation cavity according to an embodiment of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the lower surface of the centrifugal fan of the box body according to an embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of the upper surface structure of a centrifugal fan according to an embodiment of the present invention;

[0020] Figure 6 It is a schematic diagram of the structure of the mounting base and the heat dissipation fins according to an embodiment of the present invention;

[0021] Figure 7 is a schematic structural diagram of the bottom of the mounting base according to an embodiment of the present invention;

[0022] Names and serial numbers of components in the figure: 1-shell 10-accommodating cavity 11-shell ventilation hole 12-foot pad 100-ventilation duct 2-mounting seat 3-centrifugal fan 30-air inlet 31-air outlet 4-heat dissipation fins 5-temperature averaging board 6-mainboard. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0024] Embodiments of the present invention Figures 1 to 7As shown in the figure, a heat dissipation structure of a host comprises a shell 1 with an accommodating cavity 10 arranged therein, the shell 1 is composed of an upper shell and a lower shell which are connected to each other by covering, and the upper shell and the lower shell are connected together by snap-fitting and covering, so that an accommodating cavity 10 is formed inside, and the top surface, bottom surface and side surface of the shell 1 are all provided with shell vents 11, and the shell vents 11 on the top surface and the bottom surface of the shell 1 serve as shell air inlets, which are correspondingly arranged in the middle of the top surface and the bottom surface of the shell 1, and the shell vents 11 on the side surface of the shell 1 serve as shell air outlets; when in use, the mainboard 6 is horizontally installed in the accommodating cavity 10, so that it is ensured that external cold air can enter the accommodating cavity 10 from the top surface and the bottom surface of the shell 1 through the shell air inlet, This means that cold air can enter the front and back sides of the motherboard 6 in the accommodating cavity 10 at the same time, and can effectively cool the key heat-generating components on the motherboard 6. The shell air inlet on the top surface of the shell 1 ensures the air intake at the top of the CPU fan, ensuring that the CPU temperature is within a reasonable temperature range, and the shell air inlet on the bottom surface of the shell 1 ensures that cold air can enter the accommodating cavity 10 from below. At this time, the shell ventilation holes 11 on the top surface of the shell 1 and the shell ventilation holes 11 on the bottom surface of the shell 1 are ventilation holes of different shapes. For example, the shell ventilation holes 11 on the top surface of the shell 1 are set as long strip ventilation holes, and then a plurality of long strip ventilation holes are arranged in rows and columns, while the shell ventilation holes 11 on the bottom surface of the shell 1 can be set as a mesh structure ventilation hole. Hole; and in order to facilitate external cold air to effectively enter the accommodating cavity 10 from the shell ventilation holes 11 on the bottom surface of the shell 1, a plurality of foot pads 12 are arranged at equal intervals on the bottom surface of the shell 1 around the shell ventilation holes 11 on the bottom surface of the shell 1. In this way, when the host is placed horizontally on the desktop, there is a gap between the bottom surface of the host and the desktop, which facilitates the entry of cold air. The cold air entering the accommodating cavity 10 will form two airflows that flow to the SSD and memory on both sides of the back side of the motherboard 6 respectively. If the foot pad 12 is set to 5mm high and four are set, the four foot pads are arranged at equal intervals along the circumference of the shell ventilation holes 11 on the bottom surface of the shell 1. When the shell 1 is a square structure, the four foot pads 12 are arranged on the bottom surface of the shell 1. At four top corners; a mounting seat 2 is installed in the accommodating cavity 10. When in use, the mounting seat 2 is horizontally installed in the accommodating cavity 10 in a manner parallel to the main board 6 and is above the main board 6. A centrifugal fan 3 is horizontally installed on one side of the top of the mounting seat 2. The centrifugal fan 3 is installed on the rear side of the top of the mounting seat 2. The air inlet 30 of the centrifugal fan 3 is located on the upper and lower surfaces of the centrifugal fan 3 that are parallel to the top surface of the mounting seat 2, that is, the upper and lower surfaces of the centrifugal fan 3 have air inlets, and the air outlet 31 of the centrifugal fan 3 is on its side, that is, the air outlet 31 of the centrifugal fan 3 is located on the side perpendicular to the top surface of the mounting seat 2 and facing the other side of the top of the mounting seat 2, and the air outlet 31 is located on the front side surface of the centrifugal fan 3;The heat dissipation fins 4 are arranged in parallel at intervals on the other side of the top of the mounting base 2 and are perpendicular to the air outlet 31. The heat dissipation fins 4 are arranged on the front side of the top of the mounting base 2. At the same time, the plurality of heat dissipation fins 4 are arranged in parallel at equal intervals in the left and right directions. A heat dissipation channel is formed between two adjacent heat dissipation fins 4. The heat dissipation channel is perpendicular to the air outlet 31 of the centrifugal fan 3 and is connected with it. At this time, the side of the heat dissipation fin 4 facing the air outlet 31 among the plurality of heat dissipation fins 4 that is opposite to the air outlet 31 is concave in the vertical direction as an arc surface, and the side of the heat dissipation fin 4 facing the air outlet 31 is also the front end face of the heat dissipation fin 4. The front end face of the heat dissipation fin 4 facing the air outlet 31 among the plurality of heat dissipation fins 4, that is, the middle heat dissipation fin 4 is a concave arc surface, and the front end faces of the heat dissipation fins 4 on the left and right sides can be concave arc surfaces or vertical planes. The concave arc surface of the heat sink fin 4 optimizes the spacing between the air outlet 31 of the centrifugal fan 3 and the heat sink fin 4, reduces the difference in air volume obtained by each heat sink fin 4, improves the problem of temperature non-uniformity of the heat sink fin 4, and maximizes the heat dissipation efficiency of the heat sink fin 4. ;

[0025] Further improvements such as Figure 4 and Figure 5 As shown in the figure, in order to ensure that external cold air can enter from the air inlet on the lower surface of the centrifugal fan 3, one situation is to set the air outlet 31 of the centrifugal fan 3 to a trumpet-shaped structure. In this way, after the centrifugal fan 3 is horizontally installed on the mounting seat 2, there is a gap between the lower surface of the centrifugal fan 3 except the bottom surface of the air outlet 31 and the top of the mounting seat 2. The cold air can enter from the lower surface of the centrifugal fan 3 through the gap, thereby increasing the work efficiency of the centrifugal fan. The corresponding length of the heat dissipation fins 4 in the vertical direction increases with the gap between the centrifugal fan 3 and the mounting seat 2, thereby increasing its heat dissipation area and improving the heat dissipation performance. For example, if the gap between the lower surface of the centrifugal fan 3 and the top of the mounting seat 2 is set to 2.0 mm wide, the heat dissipation fins 4 will increase their height by 2.0 mm accordingly; in another situation, there is a gap directly between the lower surface of the centrifugal fan 3 and the top surface of the mounting seat 2, so that the cold air can enter from the lower surface of the centrifugal fan 3 through the gap. In either case, the mounting structure of the centrifugal fan 3 on the mounting base 2 can be installed in the following manner: a mounting column is set on the top of the mounting base 2, and then an extension arm is extended from the side wall of the centrifugal fan 3, a threaded hole is set on the top of the mounting column, and a through hole is set on the extension arm, and then a bolt is passed through the through hole and threadedly connected to the threaded hole, thereby connecting the extension arm to the mounting column, and the centrifugal fan 3 is installed on the mounting base 2.

[0026] Further improvements such as Figure 7As shown in the figure, a T-shaped temperature averaging plate 5 is provided at the bottom of the mounting base 2 at a position corresponding to the heat sink fins 4. The longitudinal super thermal conductivity of the temperature averaging plate 5 (the K value is as high as 10000W / mk, which is more than 25 times the K value of red copper) is utilized to ensure that the temperature of the heat source contact point and the temperature of the far end of the temperature averaging plate 5 are within the temperature difference range of 3 to 5°C, thereby reducing the heat loss between the heat source and the heat sink fins 4, and effectively ensuring that the heat of the CPU can be transferred to the heat sink fins 4, and then brought out of the outside of the housing 1 by forced convection by the centrifugal fan 3.

[0027] Further improvements, such as Figure 3 As shown in , ventilation ducts 100 for ventilation are arranged at two opposite cavity walls parallel to the heat dissipation fins 4 in the accommodating cavity 10. The ventilation duct 100 may be formed by a baffle plate arranged on the bottom surface of the accommodating cavity 10 and spaced from the cavity wall of the accommodating cavity 10, or by a support arm extending from the cavity wall of the accommodating cavity 10 and a baffle plate arranged on one end of the support arm away from the cavity wall of the accommodating cavity 10, or by a gap between the cavity wall of the accommodating cavity 10 and the cavity wall of the accommodating cavity 10 when the mainboard 6 is installed in the accommodating cavity 10; In this way, the cold air entering from the shell ventilation hole 11 on the bottom surface of the shell 1 is first counted into the back side of the main board 6, and then enters the front side of the main board 6 through the ventilation duct 100, and the hot air flow is then sucked into the centrifugal fan 3 through the air inlet on the lower surface of the centrifugal fan 3 and brought out of the shell 1, thereby ensuring the heat dissipation effect on the front and back sides of the main board 6, and preventing the problem of excessive temperature and reduced service life of some components caused by heat accumulation on the surface of the main board 6 that is not opposite to the centrifugal fan 3, such as setting the width of the ventilation duct 100 to a 2.8 mm wide channel.

[0028] As a further improvement, the blade thickness of the centrifugal fan 3 is 0.30-0.40 mm, so that the number of blades of the centrifugal fan 3 can be set to be more, such as setting the blade thickness of the centrifugal fan 3 to 0.35 mm and setting the number of blades to 61. In this way, the more blades there are, the larger the cross-section of air circulation is, and the more air volume is generated at the same rotation speed. The multi-blade centrifugal fan 3 can push more air when rotating, making the centrifugal fan 3 more efficient. At the same time, the interval between two adjacent heat sink fins 4 is 0.9-1.1 mm, and the thickness of the heat sink fin 4 is 0.15-0.25 mm. In this way, in combination with the centrifugal fan 3, the centrifugal fan 3 works at the best power efficiency ratio, such as setting the interval between two adjacent heat sink fins 4 to 1.0 mm and the thickness to 0.2 mm.

[0029] Further improvements, such as Figure 5 As shown in , the air inlet 30 on the lower surface of the centrifugal fan 3 includes a plurality of arc-shaped air outlets arranged at equal intervals along a circumference, which facilitates the installation of the centrifugal fan 3 and maintains the stability of the structure of the centrifugal fan 3.

[0030] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A heat dissipation structure of a host, Features: It comprises a shell with an accommodating cavity arranged inside, and the top surface, bottom surface and side surface of the shell are all provided with shell ventilation holes; a mounting seat is installed in the accommodating cavity, and a centrifugal fan is horizontally installed on one side of the top of the mounting seat, the air inlet of the centrifugal fan is located on the upper and lower surfaces of the centrifugal fan parallel to the top surface of the mounting seat, and the air outlet of the centrifugal fan is located on the side perpendicular to the top surface of the mounting seat and facing the other side of the top of the mounting seat; a plurality of heat dissipation fins perpendicular to the air outlet are arranged in parallel at intervals on the other side of the top of the mounting seat; a side opposite to the air outlet on the heat dissipation fins directly facing the air outlet among the plurality of heat dissipation fins is concave in the vertical direction to be an arc surface.

2. The heat dissipation structure of the host according to claim 1, Features :The air outlet is in a trumpet-shaped structure.

3. The heat dissipation structure of the host according to claim 1, Features There is a gap between the lower surface of the centrifugal fan and the top surface of the mounting seat.

4. The heat dissipation structure of the host according to claim 1, Features A plurality of foot pads are arranged at equal intervals on the bottom surface of the shell around the shell ventilation holes.

5. The heat dissipation structure of the host according to claim 1, Features A temperature balancing plate with a T-shaped structure is arranged at the bottom of the mounting base at a position corresponding to the heat dissipation fins.

6. The heat dissipation structure of the host according to claim 1, Features The accommodating cavity is provided with ventilation ducts for ventilation at two opposite cavity walls parallel to the heat dissipation fins.

7. The heat dissipation structure of the host according to claim 1, Features :The blade thickness of the centrifugal fan is 0.30-0.40mm.

8. The heat dissipation structure of the host according to claim 1, Features :The interval between two adjacent heat dissipation fins is 0.9-1.1mm, and the thickness of the heat dissipation fins is 0.15-0.25mm.

9. The heat dissipation structure of the host according to claim 1, Features The shell ventilation holes on the top surface of the shell and the shell ventilation holes on the bottom surface of the shell are ventilation holes of different shapes.

10. The heat dissipation structure of the host according to claim 1, Features The air inlet on the lower surface of the centrifugal fan includes a plurality of arc-shaped air inlets arranged at equal intervals along a circumference.

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