CN217786967U - Constant temperature and constant pressure interface thermal resistance testing device - Google Patents
Constant temperature and constant pressure interface thermal resistance testing device Download PDFInfo
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- CN217786967U CN217786967U CN202221017288.XU CN202221017288U CN217786967U CN 217786967 U CN217786967 U CN 217786967U CN 202221017288 U CN202221017288 U CN 202221017288U CN 217786967 U CN217786967 U CN 217786967U
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Abstract
The utility model discloses a decide temperature level pressure interface thermal resistance testing arrangement, including clamp plate and heat dissipation base, clamp plate and heat dissipation pedestal connection are equipped with the pressure mechanism on the clamp plate, and the below of pressure mechanism is equipped with the briquetting, goes up to be equipped with the heat source on the briquetting, goes up to be equipped with the sample that awaits measuring between briquetting and the heat dissipation base, goes up to be equipped with the point of measurement of temperature that is close to the sample that awaits measuring on briquetting and the heat dissipation base. The utility model has the advantages that: the heat sink heat dissipation capacity is obviously enhanced by adopting the heat dissipation base made of the integrated micro-channel copper material, and the heat sink temperature can be stable and controllable by adjusting the flow of the liquid inlet; the graduated scale limiting device is matched with the pressure control system, and the compression thickness and pressure can be controlled according to the actual use condition of the interface material; the periphery of the device is covered with the heat insulating layer and the aluminum foil, so that the heat exchange and the heat radiation between the system and the surrounding environment are effectively reduced, and the device is placed in the heat insulating box, so that the influence of air flow on the heat insulation of the system is eliminated; and a plurality of temperature measuring points are arranged for temperature testing, so that the measuring error is reduced.
Description
Technical Field
The utility model relates to a thermal resistance test technical field specifically is a level and temperature level and pressure interface thermal resistance testing arrangement.
Background
With the gradual rise of heat power consumption of electronic equipment, heat-conducting silicone grease, heat-conducting gaskets and the like are widely used for filling or coating between power components and heat dissipation plates or radiators as common thermal interface materials.
In the existing heat conductivity coefficient testing equipment adopting a steady-state heat flow meter method, the defects of high requirement on the shape and the size of a tested piece, unreasonable distribution of temperature testing points, insufficient heat sink heat dissipation capacity, heat dissipation from other places and the like exist, and because the compression thickness and the pressure are uncontrollable, the thermal interface material is easy to damage due to measurement error or uneven compression, and the measurement of the heat conductivity coefficient is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the defects of the prior art, in order to improve the accuracy of the interface thermal resistance testing device, the constant temperature and constant pressure interface thermal resistance testing device which is simple in structure and easy to operate is designed, and the problems to be solved are as follows: 1. the heat sink temperature is stable and controllable; 2. the limiting device controls the thickness of the interface material, so that the compression pressure and the thickness can be adjusted; 3. the heat transfer process and the heat exchange and radiation heat loss between the air are reduced.
The purpose of the utility model is realized through the following technical scheme:
a constant temperature and pressure interface thermal resistance testing device comprises a pressing plate and a heat dissipation base, wherein the pressing plate is connected with the heat dissipation base, a pressure mechanism is arranged on the pressing plate, an upper pressing block is arranged below the pressure mechanism, a heat source is arranged on the upper pressing block, a sample to be tested is arranged between the upper pressing block and the heat dissipation base, and temperature measuring points close to the sample to be tested are arranged on the upper pressing block and the heat dissipation base.
Furthermore, the upper pressing block and the heat dissipation base are both square in cross section.
Furthermore, the temperature measuring points are respectively positioned on the outer surfaces of the upper pressing block and the heat dissipation base, at the position 1/4 of the distance from the outer surface and at the position 1/2 of the distance from the outer surface.
Furthermore, a pressure sensing assembly is arranged on the pressure mechanism.
Furthermore, the pressing plate is connected with the heat dissipation base through a connecting screw rod.
Furthermore, the heat source is pasted at four corners of the top of the upper pressing block and is connected with a direct current power supply.
Furthermore, a limiting mechanism for controlling the downward pressing distance of the upper pressing block is arranged on the upper pressing block.
Furthermore, the limiting mechanism comprises two limiting mechanisms which are symmetrically arranged.
Further, stop gear include spacing seat, spacing pipe is vertical to be worn to establish on spacing seat, is equipped with the scale on the spacing pipe, threaded connection has the stop screw who pushes up spacing pipe on the spacing seat.
Furthermore, a thickness locking mechanism is arranged between the upper pressing block and the heat dissipation base.
Further, the thickness locking mechanism comprises two symmetrically arranged thickness locking mechanisms.
Furthermore, thickness locking mechanism include lock ear and lower lock ear, lock ear establishes on last briquetting, lock ear is established on the heat dissipation base down, go up the cooperation of connecting between lock ear and the lower lock ear.
Further, the heat dissipation base include briquetting and microchannel base down, the sample that awaits measuring establishes at last briquetting under with between the briquetting, be equipped with feed liquor groove and play liquid groove on the microchannel base, form the microchannel between feed liquor groove and the play liquid groove.
Furthermore, the pressing plate and the heat dissipation base are coated with heat insulation materials and aluminum foil films, and the heat insulation materials and the aluminum foil films are located in the heat insulation box.
The utility model has the advantages that:
1) The heat sink heat dissipation capacity is obviously enhanced by adopting the heat dissipation base made of the integrated micro-channel copper material, and the heat sink temperature can be stable and controllable by adjusting the flow of the liquid inlet.
2) The graduated scale stop device cooperates with pressure control system, can compress thickness and pressure according to interface material actual use condition control.
3) The heat insulation layer and the aluminum foil are covered on the periphery of the device, so that the heat exchange and the heat radiation between the system and the surrounding environment are effectively reduced, and the device is placed in the heat insulation box, so that the influence of air flow on the heat insulation of the system is eliminated.
4) And multiple temperature measuring points are arranged for temperature testing, so that the measuring error is reduced.
5) And comparing the test result with the simulation calculation result, correcting the simulation parameters by considering the radiation heat loss factors of the system and the environment, and reducing the error between the simulation calculation and the actually measured data.
The main scheme and the further selection schemes of the utility model can be freely combined to form a plurality of schemes, which are the schemes that can be adopted and claimed by the utility model; in addition, the utility model can be freely combined between the (non-conflict selection) selections and other selections. The skilled person in the art can understand that there are many combinations according to the prior art and the common general knowledge after understanding the solution of the present invention, which are all the technical solutions to be protected by the present invention, and the solution is not exhaustive here.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the heat dissipation base of the present invention.
Fig. 3 is a schematic view of the distribution of the temperature measuring points of the present invention.
In the figure: 1-pressure mechanism, 2-pressing plate, 3-heat source, 4-upper pressing block, 5-sample to be measured, 6-limiting mechanism, 7-heat dissipation base, 8-heat preservation box, 9-lower pressing block and 10-micro-channel base.
Detailed Description
The invention will be further described with reference to the following specific embodiments and the accompanying drawings.
Referring to fig. 1 to 3, a constant temperature and pressure interface thermal resistance testing device includes a pressure mechanism 1, a pressure plate 2, a heat source 3, an upper pressing block 4, a sample to be tested 5, a limiting mechanism 6, a locking mechanism, a heat dissipation base 7 and an incubator 8, wherein the heat dissipation base 7 includes a lower pressing block 9 and a micro flow channel base 10.
The pressing plate 2 is a square section, the micro-channel base 10 is also a square section, and the pressing plate 2 and the micro-channel base 10 are fixedly connected through connecting screws at four corners to form an integral structural frame.
Install pressure mechanism 1 on the clamp plate 2, the below of pressure mechanism 1 is equipped with briquetting 4, and pressure mechanism 1 is equipped with pressure sensing assembly to last briquetting 4 effect downforce, can real-time supervision pressure value on the pressure mechanism 1.
Go up briquetting 4 and briquetting 9 down and be the square cross-section that the size is the same, go up and be equipped with the sample 5 that awaits measuring between briquetting 4 and the heat dissipation base 7, through the effort of pressure mechanism 1, extrude the sample 5 that awaits measuring between two briquettings, reach thickness and pressure under the in-service use state.
The upper pressing block 4 is provided with the heat source 3, the heat source 3 is adhered to four corners of the top of the upper pressing block 4, and the heat source 3 is connected with the direct current power supply to realize temperature control of a test environment.
The upper pressing block 4 and the heat dissipation base 7 are provided with temperature measuring points close to the sample 5 to be measured. The temperature measuring points are respectively positioned on the rear surfaces of the upper pressing block 4 and the heat dissipation base 7, at the positions 1/4 of the side distance from the left surface and at the positions 1/2 of the side distance from the front surface, namely the temperature measuring points a, b and c in the figure 3.
The upper pressing block 4 is provided with two limiting mechanisms 6 for controlling the pressing distance of the upper pressing block 4, and the two limiting mechanisms 6 are arranged in a bilateral symmetry mode. Stop gear 6 is including welding the spacing seat on last briquetting 4, and on spacing pipe was vertical to be worn to establish on spacing seat, is equipped with the scale on the spacing pipe, and threaded connection has the stop screw who pushes up spacing pipe on the spacing seat. The downward extension of the limiting circular tube is adjusted, so that the downward pressing distance of the upper pressing block 4 can be controlled, and the downward pressing thickness of the sample 5 to be detected is ensured.
And a thickness locking mechanism is arranged between the upper pressing block 4 and the heat dissipation base 7, and the thickness locking mechanism comprises two mechanisms which are symmetrically arranged front and back. The thickness locking mechanism comprises an upper locking lug and a lower locking lug, the upper locking lug is welded on the upper pressing block 4, the lower locking lug is welded on the heat dissipation base 7, and the upper locking lug and the lower locking lug are connected and matched through a binding belt. The two pressing blocks are locked through the locking screws, the state of a sample to be measured can be kept at the moment, and then the pressure mechanism 1 is withdrawn, so that the measurement is prevented from being influenced by heat transfer.
The heat dissipation base 7 is integrally formed by a lower pressing block 9 and a micro-channel base 10 through a vacuum welding process, a liquid inlet groove and a liquid outlet groove are arranged on the micro-channel base 10, the liquid inlet groove is communicated with a liquid inlet, and the liquid outlet groove is communicated with a liquid outlet. A micro-channel is formed between the liquid inlet groove and the liquid outlet groove.
The clamp plate 2 and the heat dissipation base 7 are coated with heat insulation materials and aluminum foil films, and the heat insulation materials and the aluminum foil films are located in the heat insulation box 8, so that the whole test environment is insulated, and the test precision is improved.
The method comprises the following main testing steps:
1) The periphery of the top of the upper pressing block 4 is uniformly pasted with the heat source 3, and the heating power is controlled by a direct current power supply.
2) The sample 5 to be measured is arranged between the upper pressing block 4 and the lower pressing block 9, and the temperature of the heat sink is stable and controllable by adjusting the flow of the liquid inlet.
3) Adjust stop gear 6 to thermal interface material in-service use condition compression thickness, pressurize through pressure mechanism 1 and make down briquetting 9 and evenly push down, make pressure controllable according to pressure sensor feedback, treat the 6 compression backs of stop gear, the locking lug is locked, pressure mechanism 1 is removed, avoids partial heat to flow out from pressure mechanism 1.
4) Temperature measuring holes (such as points a, b and c in the attached drawing 3) are respectively arranged at 1/2 and 1/4 of the outer surface of the same cross section of the upper pressing block 4 and the lower pressing block 9, a temperature sensor is inserted into the temperature measuring holes, and temperature acquisition, processing and output are realized through a temperature tester.
5) The periphery of the testing device is covered with the nanometer heat-insulating material and the aluminum foil film, the heat conductivity coefficient is less than 0.03W/mk, the heat insulation performance is good, and then the device is placed in the heat-insulating box 8.
6) Establishing a finite element simulation model, and checking the thermal conductivity coefficient of the interface material by combining simulation and measurement.
The test principle is as follows: the cooling end heat dissipation base adopts the micro-channel structural design, the heat convection coefficient of a cooling medium and a cold plate is greatly improved, the heat dissipation performance is obviously improved, fixed power is applied to a heat source, a heat insulation layer is covered on the device and is arranged in the heat insulation box, and the heat transfer can be regarded as one-dimensional transfer from the heat source to the heat dissipation base. After the temperature of the temperature point to be measured is stable, the multi-point measured data is read, the comparison and check are carried out on the multi-point measured data and the finite element simulation model, the parameters of the thermal conductivity coefficient, the radiation emissivity and the like of the thermal interface material in the simulation model are corrected, and an important basis is provided for the early-stage evaluation of the heat dissipation capacity of the electronic equipment.
The aforesaid the utility model discloses basic embodiment and each further alternative can the independent assortment in order to form a plurality of embodiments, is the utility model discloses can adopt and claim the embodiment of protection. In the scheme of the utility model, each option can be combined with any other base examples and options at will.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. The utility model provides a decide temperature level pressure interfacial thermal resistance testing arrangement, includes clamp plate (2) and heat dissipation base (7), and clamp plate (2) and heat dissipation base (7) are connected, its characterized in that: the temperature measuring device is characterized in that a pressure mechanism (1) is arranged on the pressure plate (2), a pressing block (4) is arranged below the pressure mechanism (1), a heat source (3) is arranged on the pressing block (4), a sample (5) to be measured is arranged between the pressing block (4) and the heat dissipation base (7), and temperature measuring points close to the sample (5) to be measured are arranged on the pressing block (4) and the heat dissipation base (7).
2. The constant temperature and constant pressure interfacial thermal resistance testing device of claim 1, wherein: the temperature measuring points are respectively positioned on the outer surfaces of the upper pressing block (4) and the heat dissipation base (7), 1/4 side distance from the outer surface and 1/2 side distance from the outer surface.
3. The constant temperature and pressure interfacial thermal resistance testing device of claim 1, wherein: and a pressure sensing assembly is arranged on the pressure mechanism (1).
4. The constant temperature and pressure interfacial thermal resistance testing device according to claim 1 or 3, wherein: the heat source (3) is adhered to four corners of the top of the upper pressing block (4), and the heat source (3) is connected with a direct-current power supply.
5. The constant temperature and pressure interfacial thermal resistance testing device of claim 1, wherein: and the upper pressing block (4) is provided with a limiting mechanism (6) for controlling the pressing distance of the upper pressing block (4).
6. The constant temperature and pressure interfacial thermal resistance testing device of claim 5, wherein: stop gear (6) including spacing seat, vertical the wearing of spacing pipe is established on spacing seat, is equipped with the scale on the spacing pipe, threaded connection has the stop screw who pushes up spacing pipe on the spacing seat.
7. The constant temperature and constant pressure interfacial thermal resistance testing device of claim 1, wherein: and a thickness locking mechanism is arranged between the upper pressing block (4) and the heat dissipation base (7).
8. The constant temperature and pressure interfacial thermal resistance testing device of claim 7, wherein: the thickness locking mechanism comprises an upper locking lug and a lower locking lug, the upper locking lug is arranged on the upper pressing block (4), the lower locking lug is arranged on the heat dissipation base (7), and the upper locking lug and the lower locking lug are connected and matched.
9. The constant temperature and pressure interfacial thermal resistance testing device of claim 1, wherein: the heat dissipation base (7) include briquetting (9) and microchannel base (10) down, the sample (5) of awaiting measuring establish in last briquetting (4) and down between briquetting (9), be equipped with feed liquor groove and play liquid tank on microchannel base (10), form the microchannel between feed liquor groove and the play liquid tank.
10. The constant temperature and pressure interfacial thermal resistance testing device of claim 1, wherein: the pressing plate (2) and the heat dissipation base (7) are coated with heat insulation materials and aluminum foil films, and the heat insulation materials and the aluminum foil films are located in the heat insulation box (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221017288.XU CN217786967U (en) | 2022-04-28 | 2022-04-28 | Constant temperature and constant pressure interface thermal resistance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221017288.XU CN217786967U (en) | 2022-04-28 | 2022-04-28 | Constant temperature and constant pressure interface thermal resistance testing device |
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| Publication Number | Publication Date |
|---|---|
| CN217786967U true CN217786967U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221017288.XU Active CN217786967U (en) | 2022-04-28 | 2022-04-28 | Constant temperature and constant pressure interface thermal resistance testing device |
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| CN (1) | CN217786967U (en) |
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- 2022-04-28 CN CN202221017288.XU patent/CN217786967U/en active Active
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