A forced air radiator based on TPMS structure and piezoelectric fan reinforcement

Abstract

The application discloses a kind of air-cooled radiator based on TPMS structure and piezoelectric fan strengthening, including main fan, special-shaped heat pipe, TPMS structure radiating fin, piezoelectric fan and driving power supply;The lower end of main fan is connected with the heat source below through special-shaped heat pipe, and the bottom flat plate, the middle two side walls and the top annular side wall are integrally formed with TPMS structure radiating fin by 3D printing technology;The vibration amplification device in piezoelectric fan is connected with one end of the fixing device located outside;Piezoelectric ceramic is installed above the connection place of fixing device and vibration amplification device by adhesive, and is arranged on both sides of radiator respectively;Driving power supply is located outside piezoelectric fan on both sides.The air-cooled radiator forms forced convection by main fan and piezoelectric fan, good heat uniformity of special-shaped heat pipe and larger heat exchange area provided by TPMS structure, solve the problem of uneven heating, larger volume and poor heat exchange capacity of traditional air-cooled radiator.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-efficiency heat exchange, and particularly relates to an air-cooled radiator reinforced by a TPMS structure and a piezoelectric fan. BACKGROUND

[0002] With the progress of science and technology, electronic components are continuously developed in the direction of miniaturization, light weight and high power, which leads to a large amount of heat generated in a small space in an electronic system, and how to realize the heat dissipation of high-power electronic components becomes a problem to be solved. Research shows that when electronic components work at a temperature of 70 DEG C to 80 DEG C, the reliability will decrease by 5% for each 1 DEG C increase in the working temperature, and a local temperature that is too high will cause the electronic components to burn out. Therefore, it is particularly important to improve the overall heat exchange efficiency of the radiator.

[0003] The traditional radiator has problems such as a large volume and poor heat equalization, and this feature limits its further application. As a passive high-efficiency heat dissipation technology, the flat plate heat pipe has a high efficient heat conduction coefficient and good temperature equalization, and the structure is easy to be directly integrated in a semiconductor mold. Different sizes of flat plate heat pipes have excellent adaptability and temperature equalization capacity for electronic devices with different heat dissipation power requirements, and are key heat dissipation technologies that are expected to solve the overheating protection problem of electronic devices and eliminate local hot spots. Meanwhile, with the development of the additive manufacturing industry, the TPMS is a bionic curved surface structure with high specific surface, high smoothness and high structural strength, and is gradually applied in various industries. Compared with the traditional finned radiator, the heat exchange area of the TPMS structure radiator can be increased by more than 25% under the same volume.

[0004] The piezoelectric fan used for the heat generating device with limited heat dissipation space has the advantages of small volume, long service life, low power consumption, simple structure and small noise. However, the working power is small, and it is difficult to meet the heat dissipation requirements of conventional electronic devices.

[0005] Therefore, how to optimize the forced convection of the radiator, increase the heat exchange area of the radiator, and solve the problem of insufficient heat exchange capacity of the radiator in a limited space has become the current research direction. SUMMARY

[0006] The application provides an air-cooled radiator reinforced by a TPMS structure and a piezoelectric fan, heat generated by a heat source is absorbed and dissipated by a special-shaped heat pipe and a TPMS structure radiator fin, and the piezoelectric fan assists the main fan to enhance the overall convective heat exchange intensity and increase the air volume, so that the problems of low heat exchange efficiency, large volume and insufficient heat dissipation effect of the traditional radiator are solved.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a forced air cooling radiator based on TPMS structure and piezoelectric fan strengthening, comprising a main fan, a special-shaped heat pipe, a TPMS structure heat sink, a piezoelectric fan and a driving power supply;

[0008] The main fan is located at the top area of the radiator, the lower end of the main fan is connected with the heat source below through the special-shaped heat pipe with a composite core structure for heat transfer, the inner side of the lower end of the special-shaped heat pipe is provided with the TPMS structure heat sink, the special-shaped heat pipe comprises a bottom plate, a middle two-side wall and a top annular side wall, and the bottom plate, the middle two-side wall and the top annular side wall are integrally formed with the TPMS structure heat sink by 3D printing technology for increasing the heat exchange area and reducing the thermal resistance; the forced air cooling radiator provides the forced convection formed by the main fan and the piezoelectric fan, the good heat uniformity of the special-shaped heat pipe and the larger heat exchange area provided by the TPMS structure.

[0009] The piezoelectric fan is arranged on both sides of the radiator respectively, and the piezoelectric fan comprises a piezoelectric ceramic, a vibration amplification device, an adhesive and a fixing device, the vibration amplification device is connected with one end of the fixing device located on the outer side; the piezoelectric ceramic is fixedly installed above the connection position of the fixing device and the vibration amplification device by the adhesive and is arranged on both sides of the radiator respectively to jointly form the overall structure of the piezoelectric fan; the vibration of the vibration amplification device provides the air volume for the radiator.

[0010] The driving power supply is located outside the piezoelectric fan on both sides, and the driving power supply is connected with the fixing device for supplying power to the piezoelectric fan and the main fan.

[0011] Preferably, the bottom plate is located at the bottom as an evaporation section for absorbing the heat of the bottom heat source, the middle two-side wall is a transportation section, and the top annular wall is a condensation section; the gas evaporated by the evaporation section at the bottom is transported to the condensation section area at the top through the transportation section at the middle, and the cold air continuously flows through the TPMS structure heat sink for convection heat exchange under the joint action of the main fan and the piezoelectric fan structure.

[0012] Preferably, the outer side of the whole side wall of the special-shaped heat pipe is coated with a high-emissivity infrared coating for increasing the radiation heat dissipation.

[0013] Preferably, the TPMS structure heat sink controls the size of the unit cell through x, y and z parameters, the wall thickness of the unit cell is d, and then the heat exchange area and the equivalent diameter of the whole heat sink are controlled.

[0014] Preferably, when the alternating current of the driving power supply is supplied to the piezoelectric ceramic, the piezoelectric ceramic generates periodic elongation and shortening.

[0015] Preferably, the piezoelectric ceramic is expanded and contracted, and the expansion and contraction is amplified by the vibration amplification device and converted into vibration of the blade of the vibration amplification device, and then air is drawn into the radiator along with the vibration of the blade, so as to assist the main fan in air intake, and the vibration end of the vibration amplification device is located in the interior of the radiator, and internal turbulence is formed when the blade vibrates, so as to enhance the overall convective heat transfer intensity of the radiator.

[0016] Preferably, the material of the vibration amplification device is a flexible material, the material of the piezoelectric ceramic is a piezoelectric material, the material of the adhesive is a flexible glue, and the material of the fixing device is a printed circuit board (PCB).

[0017] Preferably, the center area below the special-shaped heat pipe is coated with a heat-conducting silicone grease, and other fixing means are installed on the heat-generating element.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The present application uses a TPMS structure to replace a conventional fin structure, increases the heat exchange area, and enhances the turbulence of fluid flowing through the wall, so that the special-shaped heat pipe is quickly cooled, and the overall convective heat transfer intensity and air volume are enhanced by the piezoelectric fan assisting the main fan, so as to achieve the purpose of enhancing heat exchange. Meanwhile, the high-emissivity infrared coating provided on the outside of the special-shaped heat pipe improves the radiation heat dissipation intensity of the surrounding environment, and comprehensively improves the heat dissipation effect.

[0020] 2. The present application uses a composite core structure special-shaped heat pipe manufactured by a 3D printing technology and a TPMS structure radiator fin structure, and the piezoelectric fan is small in size and low in power consumption, so that high-efficiency heat dissipation is realized in a limited space by the combination of the two, and the heat dissipation requirements of small-sized and high-power electronic elements are met. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with embodiments of the present application to explain the present application, and do not constitute a limitation on the present application.

[0022] In the drawings:

[0023] Figure 1 is a structure schematic view of the air-cooled radiator of the present application as a whole;

[0024] Figure 2 is a right view of the air-cooled radiator of the present application based on a TPMS structure and a piezoelectric fan;

[0025] Figure 3 is a front view of the air-cooled radiator of the present application based on a TPMS structure and a piezoelectric fan;

[0026] Figure 4It is a partial view of the piezoelectric fan of the air-cooled radiator based on TPMS structure and piezoelectric fan strengthening according to the present application;

[0027] Figure 5 It is a front view of the unit lattice structure of the TPMS structure fin according to the present application;

[0028] Figure 6 It is a right longitudinal sectional view of the special-shaped heat pipe according to the present application;

[0029] Figure 7 It is a right longitudinal sectional view of the special-shaped heat pipe according to the present application;

[0030] In the figure, 1 is a main fan, 2 is a special-shaped heat pipe, 201 is a condensing section, 202 is a transport section, 203 is an evaporation section, 3 is a vibration amplification device, 4 is a driving power supply, 5 is a piezoelectric ceramic, 6 is a TPMS structure fin, 7 is an adhesive, and 8 is a fixing device. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0032] As shown in the figure, the present application provides an air-cooled radiator based on TPMS structure and piezoelectric fan strengthening, which comprises a main fan 1, a special-shaped heat pipe 2, a vibration amplification device 3, a driving power supply 4, a piezoelectric ceramic 5, a TPMS structure fin 6, an adhesive 7, and a fixing device 8. Figures 1-7 The driving power supply 4 supplies power to the piezoelectric ceramic 5 and the main fan 1, so that the piezoelectric ceramic 5 can stretch and retract, and the fan blades of the main fan 1 can rotate. The piezoelectric ceramic 5 is connected to the vibration amplification device 3 and the fixing device 8 through the adhesive 7. The special-shaped heat pipe 2 is integrally formed and constructed with the TPMS structure fin 6 through 3D printing technology, including a top annular side wall, a middle two side wall, and a bottom plate.

[0033] As shown in the figure, the TPMS structure fin 6 in the present embodiment controls the size of the lattice unit through three parameters x, y, and z, and the wall thickness of the unit lattice is d, thereby controlling the heat exchange area and equivalent diameter of the overall fin.

[0034] Figure 5

[0035] ​​The heat-conducting silicone grease applied to the center area below the special-shaped heat pipe 2 in this embodiment is fixed and connected to the electronic components by other means, and the heat is transferred to the special-shaped heat pipe 2 through the heat-conducting silicone grease. The special-shaped heat pipe 2 and the TPMS structure heat sink 6 are made of aluminum alloy material by 3D printing. The bottom plate in the special-shaped heat pipe 2 is the evaporation section 203 that absorbs the heat of the bottom heat source, the two side walls in the middle are the transport section 202, and the top annular side wall area is the condensation section 201. The gas evaporated by the evaporation section 203 in the bottom is transported to the condensation section 201 area in the top through the transport section 202 in the middle, and the inner side is connected to the TPMS structure heat sink 6. The cold air flows through the TPMS structure heat sink 6 for convection heat exchange under the joint action of the main fan 1 and the piezoelectric fan structure. Compared with the traditional heat sink, the TPMS structure provides a larger specific surface area while forming a boundary layer separation at the bending part of the smooth curved surface, greatly increasing the turbulence of the fluid flowing through the wall, greatly improving the heat exchange effect, and then quickly cooling the TPMS structure heat sink 6. The outer side of the special-shaped heat pipe is coated with a high-emissivity infrared coating, which quickly dissipates the heat of the condensation section 201, improves the radiation heat dissipation intensity of the surrounding environment, and achieves the purpose of sufficient heat dissipation.

[0036] In this embodiment, the piezoelectric ceramic 5 is connected above the vibration amplification device 3 and the fixing device 8 by the adhesive 7 and is arranged on both sides of the radiator to form the overall structure of the piezoelectric fan. The driving power supply 4 provides alternating current power for the piezoelectric fan. The piezoelectric ceramic 5 is made of lead zirconate titanate ceramic material, which is elongated or contracted under the influence of current due to the material properties. However, the change is small, so the vibration amplification device 3 is needed to amplify the expansion and contraction of the piezoelectric ceramic 5 and convert it into vibration of the blade of the vibration amplification device 3, so that the air enters the radiator with the vibration of the blade, achieving the effect of auxiliary air intake of the main fan. At the same time, the vibration end of the vibration amplification device 3 is located inside the radiator, and internal turbulence is formed when the blade vibrates, which enhances the overall convective heat transfer intensity of the radiator to a certain extent.

[0037] In this embodiment, the special-shaped heat pipe 2 adopts a composite core structure; and the special-shaped heat pipe 2 and the TPMS structure heat sink 6 are made of aluminum alloy material by 3D printing. The smooth curved structure inside the TPMS structure heat sink 6 increases the heat exchange area while forming local turbulence, increasing the convective heat transfer intensity; the piezoelectric ceramic 5 is connected above the vibration amplification device 3 and the fixing device 8 by the adhesive 7 and is arranged on both sides of the radiator to form the overall structure of the piezoelectric fan.

[0038] When the alternating current of the driving power supply 4 is supplied to the piezoelectric ceramic 5, the piezoelectric ceramic 5 generates periodic elongation and shortening. The reciprocating motion is transmitted to the vibration amplifying device 3 through the adhesive 7, forming reciprocating vibration, and the air flow is introduced into the radiator from below, while the internal turbulence of the radiator is enhanced to strengthen the internal convection heat exchange.

[0039] The material of the vibration amplifying device 3 in the embodiment is flexible material, the material of the piezoelectric ceramic 5 is piezoelectric material, the material of the adhesive 7 is flexible glue, and the material of the fixing device 8 is printed circuit board (PCB) to ensure sufficient structural strength. The center area of the special-shaped heat pipe 2 below is coated with heat-conducting silicone grease, and other fixing means are installed on the heat-generating element to achieve heat dissipation in limited space and prevent the heat-generating element from being burned out and malfunctioning due to overheating.

[0040] Finally, it should be noted that the above only describes the preferred examples of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wind-cooled heat sink based on TPMS structure and piezoelectric fan reinforcement, characterized in that: The main fan, the special-shaped heat pipe, the TPMS structure heat sink, the piezoelectric fan and the driving power supply are included. The main fan is located at the top area of the radiator, and the lower end of the main fan is connected with the heat source below through the special-shaped heat pipe for heat transfer. The piezoelectric fan is arranged on both sides of the radiator, and the piezoelectric fan includes the piezoelectric ceramic, the vibration amplification device, the adhesive and the fixing device. The driving power supply is located outside the piezoelectric fan on both sides, and the driving power supply is connected with the fixing device for power supply of the piezoelectric fan and the main fan. The vibration amplification device amplifies the expansion and contraction of the piezoelectric ceramic and converts it into the vibration of the vibration amplification device blade, so that air enters the radiator with the vibration of the blade.

2. The air-cooled radiator based on TPMS structure and piezoelectric fan reinforcement according to claim 1, characterized in that: The bottom plate is the evaporation section for absorbing the heat of the bottom heat source, the middle two side walls are the transportation section, and the top ring wall is the condensation section.

3. The air-cooled heat sink based on TPMS structure and piezoelectric fan enhancement according to claim 2, characterized in that: The outer side of the whole side wall of the special-shaped heat pipe is coated with a high-emissivity infrared coating for increasing radiation heat dissipation.

4. The air-cooled heat sink based on TPMS structure and piezoelectric fan enhancement according to claim 1, characterized in that: The TPMS structure heat sink controls the size of the unit cell through x, y and z parameters, and the wall thickness of the unit cell is d, so as to control the heat exchange area and equivalent diameter of the whole heat sink.

5. The air-cooled heat sink based on TPMS structure and piezoelectric fan enhancement according to claim 1, characterized in that: When the alternating current of the driving power supply is supplied to the piezoelectric ceramic, the piezoelectric ceramic generates periodic elongation and shortening.

6. The air-cooled heat sink based on TPMS structure and piezoelectric fan intensification according to claim 1, characterized in that: The material of the vibration amplification device is flexible material, the material of the piezoelectric ceramic is piezoelectric material, the material of the adhesive is flexible glue, and the material of the fixing device is printed circuit board.

7. The air-cooled heat sink based on TPMS structure and piezoelectric fan intensification according to claim 1, characterized in that: The center area below the special-shaped heat pipe is coated with heat-conducting silicone grease, and other fixing means are installed on the heating element.

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