CN219065346U - Heat dissipation performance testing device - Google Patents
Heat dissipation performance testing device Download PDFInfo
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- CN219065346U CN219065346U CN202223329693.8U CN202223329693U CN219065346U CN 219065346 U CN219065346 U CN 219065346U CN 202223329693 U CN202223329693 U CN 202223329693U CN 219065346 U CN219065346 U CN 219065346U
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Abstract
The utility model discloses a heat radiation performance testing device which comprises a temperature control mechanism, a constant temperature heating platform, a fixed support, a temperature data acquisition unit and a temperature sensing probe, wherein the constant temperature heating platform is arranged at the top of the temperature control mechanism, the fixed support is arranged on the constant temperature heating platform, the temperature data acquisition unit and the temperature sensing probe are connected with the fixed support, a testing monomer is placed on the constant temperature heating platform, and the temperature sensing probe is arranged above the testing monomer. By combining the test monomer and the heat radiation performance test device with the thermal resistance test platform, the utility model can quickly, intuitively and effectively carry out comparison analysis on the actual application scene of the heat conduction silicone grease on the external machine of the air conditioner, and avoid hidden quality hazards and use risks caused by lack of evaluation of actual use environment, which are caused by development, introduction and use of materials on products.
Description
Technical Field
The utility model relates to the technical field of heat radiation performance test, in particular to a heat radiation performance test device.
Background
At present, the analysis means for the heat dissipation performance of the heat conduction silicone grease mainly comprises testing the heat conductivity, and testing the heat conductivity by referring to the ASTM-D5470 (Standard test method for the heat transmission performance of heat conduction and electric insulation materials). The test method is based on idealized conditions, placing a test specimen of a given thickness between two parallel surfaces that are isothermal and thermally, for testing the thermal impedance of an electrically insulating material in a steady state, which is commonly used to enhance heat transfer in electrical and electronic applications. The criteria are also particularly applicable to samples that are thin and lack mechanical stability.
This criterion emphasizes an idealized heat flow pattern and specific, average specimen testing temperatures. This thermal impedance test cannot be used directly for most specific applications because the specific, average thermal conduction conditions required for the test are not present. Therefore, the test method cannot intuitively embody the actual thermal resistance and the thermal conduction condition of the thermal conduction silicone grease on the application scene of the electronic components. Therefore, it is necessary to invent a device for testing heat dissipation performance to test heat dissipation performance of the heat conductive silicone grease in actual situations.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a heat radiation performance testing device for solving the problems of the prior art and simulating and reducing the heat conduction performance test of the heat conduction silicone grease in the operation process of the power device of the external unit of the air conditioner.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a heat dispersion testing arrangement, includes temperature control mechanism, constant temperature heating platform, fixed bolster, temperature data collector and temperature sensing probe, constant temperature heating platform dress is in temperature control mechanism's top, the fixed bolster dress is on constant temperature heating platform, temperature data collector and temperature sensing probe and fixed bolster connection, the test monomer has been placed on the constant temperature heating platform, the top of test monomer is located to the temperature sensing probe.
As a further improvement of the utility model: the constant temperature heating platform is characterized in that a fixing support is fixedly arranged on one side above the constant temperature heating platform, a test area is arranged on the other side above the constant temperature heating platform, and a test monomer is placed above the test area.
As a further improvement of the utility model: the test monomer comprises a heat conduction substrate, a power device, a locking component and heat conduction silicone grease, wherein the power device is arranged above the heat conduction substrate, the heat conduction silicone grease is coated between the heat conduction substrate and the power device, and the heat conduction substrate is fixedly connected with the power device through the locking component.
As a further improvement of the utility model: the power device is an IGBT power module or an IPM power module of the air conditioner controller main board.
As a further improvement of the utility model: the heat conducting base material is a white aluminum profile after anodic oxidation treatment.
As a further improvement of the utility model: the IGBT power module comprises a silicon chip, a first solder layer, a first copper layer, a ceramic layer, a second copper layer, a second solder layer and a bottom plate which are sequentially arranged from top to bottom, and the bottom plate is attached to a heat conduction substrate through heat conduction silicone grease.
As a further improvement of the utility model: the temperature control mechanism is connected with the constant temperature heating platform, a temperature control power switch and a temperature display screen are arranged outside the temperature control mechanism, and the temperature control mechanism is used for controlling the temperature of the constant temperature heating platform.
As a further improvement of the utility model: the fixed support is of an inverted L shape, a temperature data collector is arranged on one side of the top of the fixed support, a temperature sensing probe is arranged on the other side of the top of the fixed support, and the temperature data collector is connected with the temperature sensing probe.
As a further improvement of the utility model: the temperature data acquisition device is connected with the temperature control mechanism and is connected with the power supply.
As a further improvement of the utility model: the locking component is a locking screw.
A heat conduction silicone grease heat dissipation performance testing method, which uses the heat dissipation performance testing device, comprises the following steps:
s1, coating heat-conducting silicone grease on a heat-conducting base material, fixing a power device on the heat-conducting base material, and attaching the power device to the heat-conducting base material through the heat-conducting silicone grease to form a test monomer;
s2, placing the test monomer on a heating platform of a test device, fixing the test monomer, and pressing down a temperature sensing probe to contact with the test monomer;
s3, starting a temperature control power switch, heating the constant-temperature heating platform to a specified temperature, and then testing at a constant temperature;
preferably, the constant temperature heating platform is heated to 100 ℃ and tested for 24 hours at a constant temperature of 100 ℃;
s4, taking out the test monomer, placing the test monomer at room temperature, and welding and connecting pins of the power device with an electrified circuit of the thermal resistance tester to enable the test monomer to run under set power;
s5, placing the welded test monomer on a thermal resistance tester, arranging temperature sensing probes at the top and the bottom of the test monomer, starting the thermal resistance tester, and collecting temperature data in the test process.
As a further improvement of the utility model: in the step S1, the heat-conducting silicone grease is coated by using a steel mesh, and the coating area of the heat-conducting silicone grease is the same as the surface area of the power device.
As a further improvement of the utility model: the coating area of the heat-conducting silicone grease is 1-10cm 2 The coating thickness of the heat-conducting silicone grease is 0.15mm.
As a further improvement of the utility model: in the step S4, the test monomer is placed at room temperature for 1 hour to stabilize.
As a further improvement of the utility model: and S5, after the thermal resistance tester is started, after the temperature is stable, continuously testing for 1 hour, collecting the temperature and the temperature difference of the top and the bottom of the test monomer, and forming a standard curve.
Compared with the prior art, the utility model has the beneficial effects that: the utility model solves the problem that the actual heat conduction performance and the thermal resistance of the heat conduction silicone grease on the components of the air conditioner external unit can not be monitored in the standard test method. By combining the test monomer and the heat radiation performance test device with the thermal resistance test platform, the utility model can quickly, intuitively and effectively carry out comparison analysis on the actual application scene of the heat conduction silicone grease on the external machine of the air conditioner, and avoid hidden quality hazards and use risks caused by lack of evaluation of actual use environment, which are caused by development, introduction and use of materials on products.
Drawings
FIG. 1 is a schematic diagram of a heat dissipation performance testing apparatus;
FIG. 2 is a schematic diagram of the structure of a test cell;
FIG. 3 is a side view of the structure of a test cell;
FIG. 4 is a schematic illustration of the connection of a thermally conductive silicone grease to a thermally conductive substrate and a power device;
fig. 5 is a schematic diagram of an internal structure of a power device;
fig. 6 is a schematic diagram of test data according to a second embodiment of the utility model.
Reference numerals in the schematic drawings illustrate:
1. a temperature control mechanism; 11. a temperature controlled power switch; 12. a temperature display screen; 2. a constant temperature heating platform; 3. a fixed bracket; 4. a temperature data collector; 5. a temperature sensing probe; 6. testing the monomer; 61. a thermally conductive substrate; 62. a power device; 621. a silicon chip; 622. a first solder layer; 623. a first copper layer; 624. a ceramic layer; 625. a second copper layer; 626. a second solder layer; 627. a bottom plate; 63. a locking assembly; 64. heat conductive silicone grease; 7. test area.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The utility model will now be further described with reference to the accompanying drawings and examples: as shown in fig. 1 to 5, a heat dissipation performance testing device comprises a temperature control mechanism 1, a constant temperature heating platform 2, a fixed support 3, a temperature data collector 4 and a temperature sensing probe 5, wherein the constant temperature heating platform 2 is arranged at the top of the temperature control mechanism 1, the fixed support 3 is arranged on the constant temperature heating platform 2, the temperature data collector 4 and the temperature sensing probe 5 are connected with the fixed support 3, a test monomer 6 is arranged on the constant temperature heating platform 2, and the temperature sensing probe 5 is arranged above the test monomer 6.
The fixed support 3 is fixedly arranged on one side of the upper part of the constant temperature heating platform 2, the test area 7 is arranged on the other side of the upper part of the constant temperature heating platform 2, and the test monomer 6 is arranged above the test area 7.
The test unit 6 comprises a heat conducting base material 61, a power device 62, a locking component 63 and heat conducting silicone grease 64, wherein the power device 62 is arranged above the heat conducting base material 61, the heat conducting base material 61 and the power device 62 are coated with the heat conducting silicone grease 64, and the heat conducting base material 61 and the power device 62 are fixedly connected through the locking component 63.
The power device 62 is an IGBT power module or an IPM power module of the air conditioner controller motherboard.
The heat conducting base material 61 is a white aluminum profile after anodic oxidation treatment.
The IGBT power module includes a silicon chip 621, a first solder layer 622, a first copper layer 623, a ceramic layer 624, a second copper layer 625, a second solder layer 626 and a bottom plate 627 sequentially provided from top to bottom, and the bottom plate 627 is attached to the heat conductive substrate 61 through a heat conductive silicone grease 64.
The temperature control mechanism 1 is connected with the constant temperature heating platform 2, a temperature control power switch 11 and a temperature display screen 12 are arranged outside the temperature control mechanism 1, and the temperature control mechanism 1 is used for controlling the temperature of the constant temperature heating platform 2.
The fixed support 3 is of an inverted L shape, a temperature data collector 4 is arranged on one side of the top of the fixed support 3, a temperature sensing probe 5 is arranged on the other side of the top of the fixed support 3, and the temperature data collector 4 is connected with the temperature sensing probe 5.
The temperature data collector 4 is connected with the temperature control mechanism 1, and the temperature data collector 4 is connected with a power supply.
The locking assembly 63 is a locking screw.
A heat conduction silicone grease heat dissipation performance testing method, which uses the heat dissipation performance testing device, comprises the following steps:
s1, coating heat-conducting silicone grease on a heat-conducting base material, fixing a power device on the heat-conducting base material, and attaching the power device to the heat-conducting base material through the heat-conducting silicone grease to form a test monomer;
s2, placing the test monomer on a heating platform of a test device, fixing the test monomer, and pressing down a temperature sensing probe to contact with the test monomer;
s3, starting a temperature control power switch, heating the constant-temperature heating platform to a specified temperature, and then testing at a constant temperature;
s4, taking out the test monomer, placing the test monomer at room temperature, and welding and connecting pins of the power device with an electrified circuit of the thermal resistance tester to enable the test monomer to run under set power;
s5, placing the welded test monomer on a thermal resistance tester, arranging temperature sensing probes at the top and the bottom of the test monomer, starting the thermal resistance tester, and collecting temperature data in the test process.
In the step S1, the heat-conducting silicone grease is coated by using a steel mesh, and the coating area of the heat-conducting silicone grease is the same as the surface area of the power device.
The coating area of the heat-conducting silicone grease is 1-10cm 2 The coating thickness of the heat-conducting silicone grease is 0.15mm.
In the step S4, the test monomer is placed at room temperature for 1 hour to stabilize.
And S5, after the thermal resistance tester is started, after the temperature is stable, continuously testing for 1 hour, collecting the temperature and the temperature difference of the top and the bottom of the test monomer, and forming a standard curve.
The working principle of the utility model is as follows: the air conditioner mainly uses heat conduction silicone grease 63 on high-power devices such as an IPM module, a voltage stabilizing block and the like of a control main board, the collector loss power of the high-power devices can reach 50W, the heat resistance of a crust is maximum 3 ℃/W, the heat productivity is very large, and the long-term working temperature of the devices can reach 100 ℃. Therefore, the heat dissipation section needs to be coated with the heat-conducting silicone grease 63 and fixed with the heat sink, so that an efficient heat dissipation channel is formed among the high-power device, the heat-conducting silicone grease 63 and the heat sink to dissipate heat. Will conduct heat during testingThe silicone grease 63 is coated on the heat-conducting substrate 61 by a steel mesh with a thickness of 0.15mm, and the coating area is generally consistent with the surface of the high-power device, about 1 cm to 10cm 2 Then, the high-power device is locked on the heat conducting base material 61 by screws, so that the bottom plate 627 of the high-power device is tightly attached to the heat conducting base material 61 through the heat conducting silicone grease 63. And then, a brand new heat conduction silicone grease heat conduction performance testing method is developed on the heat resistance testing platform by combining the heat radiation performance testing device.
Embodiment case one:
as shown in fig. 1 to 5, the first embodiment provides a heat dissipation performance testing device, which comprises a temperature control mechanism 1, a constant temperature heating platform 2, a fixed support 3, a temperature data collector 4 and a temperature sensing probe 5, wherein the constant temperature heating platform 2 is arranged at the top of the temperature control mechanism 1, the fixed support 3 is arranged on the constant temperature heating platform 2, the temperature data collector 4 and the temperature sensing probe 5 are connected with the fixed support 3, a test monomer 6 is arranged on the constant temperature heating platform 2, and the temperature sensing probe 5 is arranged above the test monomer 6.
The fixed support 3 is fixedly arranged on one side of the upper part of the constant temperature heating platform 2, the test area 7 is arranged on the other side of the upper part of the constant temperature heating platform 2, and the test monomer 6 is arranged above the test area 7.
The test unit 6 comprises a heat conducting base material 61, a power device 62, a locking component 63 and heat conducting silicone grease 64, wherein the power device 62 is arranged above the heat conducting base material 61, the heat conducting base material 61 and the power device 62 are coated with the heat conducting silicone grease 64, the heat conducting base material 61 and the power device 62 are fixedly connected through the locking component 63, the locking component 63 is a locking screw, and the heat conducting base material 61 is a white aluminum profile after anodic oxidation treatment.
The power device 62 is an IGBT power module or an IPM power module of the air conditioner controller motherboard. The IGBT power module includes a silicon chip 621, a first solder layer 622, a first copper layer 623, a ceramic layer 624, a second copper layer 625, a second solder layer 626 and a bottom plate 627 sequentially provided from top to bottom, and the bottom plate 627 is attached to the heat conductive substrate 61 through a heat conductive silicone grease 64.
The temperature control mechanism 1 is connected with the constant temperature heating platform 2, a temperature control power switch 11 and a temperature display screen 12 are arranged outside the temperature control mechanism 1, and the temperature control mechanism 1 is used for controlling the temperature of the constant temperature heating platform 2.
The fixed support 3 is of an inverted L shape, a temperature data collector 4 is arranged on one side of the top of the fixed support 3, a temperature sensing probe 5 is arranged on the other side of the top of the fixed support 3, the temperature data collector 4 is connected with the temperature sensing probe 5, the temperature data collector 4 is connected with the temperature control mechanism 1, and the temperature data collector 4 is connected with a power supply.
Implementation case two:
the second embodiment provides a heat conduction silicone grease heat dissipation performance testing method, which comprises the following steps:
s1, coating heat-conducting silicone grease on a heat-conducting base material by using a steel mesh, wherein the coating area of the heat-conducting silicone grease is the same as or slightly larger than the surface area of a power device, the coating thickness of the heat-conducting silicone grease is 0.15mm, fixing the power device on the heat-conducting base material, and attaching the power device to the heat-conducting base material through the heat-conducting silicone grease to form a test monomer;
s2, placing the test monomer on a heating platform of a test device, fixing the test monomer, and pressing down a temperature sensing probe to contact with the test monomer;
s3, starting a temperature control power switch, heating the constant temperature heating platform to 100 ℃, and then testing for 24 hours at the temperature of 100 ℃;
s4, taking out the test monomer, placing the test monomer at room temperature for stabilization for 1 hour, and welding and connecting pins of the power device with an electrified circuit of the thermal resistance tester to enable the test monomer to run under set power;
s5, placing the welded test monomer on a thermal resistance tester, setting temperature sensing probes at the top and the bottom of the test monomer, starting the thermal resistance tester, continuously testing for 1 hour after the temperature is stable, collecting the temperature and the temperature difference at the top and the bottom of the test monomer, forming a standard curve, and testing data are shown in figure 6.
The main functions of the utility model are as follows: the utility model solves the problem that the actual heat conduction performance and the thermal resistance of the heat conduction silicone grease on the components of the air conditioner external unit can not be monitored in the standard test method. By combining the test monomer and the heat radiation performance test device with the thermal resistance test platform, the utility model can quickly, intuitively and effectively carry out comparison analysis on the actual application scene of the heat conduction silicone grease on the external machine of the air conditioner, and avoid hidden quality hazards and use risks caused by lack of evaluation of actual use environment, which are caused by development, introduction and use of materials on products.
In view of the above, after reading the present document, those skilled in the art should make various other corresponding changes without creative mental effort according to the technical scheme and the technical conception of the present utility model, which are all within the scope of the present utility model.
Claims (8)
1. The utility model provides a heat dispersion testing arrangement, its characterized in that includes temperature control mechanism, constant temperature heating platform, fixed bolster, temperature data collection station and temperature sensing probe, constant temperature heating platform dress is in temperature control mechanism's top, the fixed bolster dress is on constant temperature heating platform, temperature data collection station and temperature sensing probe are connected with the fixed bolster, the test monomer has been placed on the constant temperature heating platform, the top of test monomer is located to the temperature sensing probe.
2. The heat radiation performance testing device according to claim 1, wherein a fixing support is fixedly arranged on one side of the upper portion of the constant temperature heating platform, a testing area is arranged on the other side of the upper portion of the constant temperature heating platform, and a testing monomer is placed above the testing area.
3. The heat radiation performance testing device according to claim 2, wherein the testing unit comprises a heat conducting base material, a power device, a locking assembly and heat conducting silicone grease, the power device is arranged above the heat conducting base material, the heat conducting base material and the power device are coated with the heat conducting silicone grease, and the heat conducting base material and the power device are fixedly connected through the locking assembly.
4. The heat radiation performance testing device according to claim 1, wherein the temperature control mechanism is connected with the constant temperature heating platform, and a temperature control power switch and a temperature display screen are arranged outside the temperature control mechanism.
5. The heat radiation performance testing device according to claim 4, wherein the fixing support is in an inverted L shape, a temperature data collector is arranged on one side of the top of the fixing support, a temperature sensing probe is arranged on the other side of the top of the fixing support, and the temperature data collector is connected with the temperature sensing probe.
6. A heat dissipation performance testing apparatus according to claim 3, wherein the power device is an IGBT power module or an IPM power module of a motherboard of an air conditioner controller.
7. A heat sink testing device according to claim 3, wherein the locking assembly is a locking screw.
8. The heat dissipation performance testing apparatus of claim 5, wherein the temperature data collector is connected to a temperature control mechanism, and wherein the temperature data collector is connected to a power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223329693.8U CN219065346U (en) | 2022-12-13 | 2022-12-13 | Heat dissipation performance testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223329693.8U CN219065346U (en) | 2022-12-13 | 2022-12-13 | Heat dissipation performance testing device |
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| CN219065346U true CN219065346U (en) | 2023-05-23 |
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| CN202223329693.8U Active CN219065346U (en) | 2022-12-13 | 2022-12-13 | Heat dissipation performance testing device |
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