CN212364156U - Adjustable thermal conductivity coefficient testing arrangement - Google Patents
Adjustable thermal conductivity coefficient testing arrangement Download PDFInfo
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- CN212364156U CN212364156U CN202020660038.2U CN202020660038U CN212364156U CN 212364156 U CN212364156 U CN 212364156U CN 202020660038 U CN202020660038 U CN 202020660038U CN 212364156 U CN212364156 U CN 212364156U
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Abstract
An adjustable heat conductivity coefficient testing device comprises a supporting device, a heating device, a heat dissipation device and an adjustable device; the heating device comprises a heating disc, a heater for heating the heating disc and a hot end temperature detection unit for detecting the temperature of the heating disc; the heat dissipation device comprises a heat dissipation disc and a cold end temperature detection unit, wherein the heat dissipation disc is arranged in parallel with the heating disc; the adjustable device comprises a sliding rod, a sliding clamp, a rotating rod and a fixed frame; the sliding rod is arranged on the supporting device and is vertical to the heat dissipation disc; the sliding clamp is arranged on the sliding rod and moves or rotates along the sliding rod; one end of the rotating rod is fixed on the sliding clamp; the fixed mount is arranged at the other end of the rotating rod; the heating plate or the heat dissipation plate is fixed on the fixing frame; when the sliding clamp moves along the sliding rod, the heating disc and the radiating disc are close to or separated from each other. Compared with the prior art, the utility model discloses an adjustable coefficient of heat conductivity testing arrangement is in order to reduce the harmful effects because of the visual disturbance causes through rotatable, dismantlement and the adjustable device of lift.
Description
Technical Field
The utility model relates to a coefficient of heat conductivity test field especially relates to adjustable coefficient of heat conductivity testing arrangement.
Background
Electronic products in modern society are widely applied, but the electronic products inevitably generate heat in the using process, so that the problems of large power consumption, short circuit and the like are caused, and the service life of the electronic products is seriously influenced. In particular, semiconductor electronic devices with higher power, higher integration, and higher miniaturization generate more and more heat. Some measures are usually taken to cool the electronic components in order to ensure the normal use of the electronic products. The factors affecting the cooling effect are many, and the thermal conductivity of the object is one of them.
The process of transferring heat between two objects in contact with each other and at different temperatures, or between different temperature portions of the same object, without relative macroscopic displacements, is called thermal conduction. The property of a substance to conduct heat is referred to as the thermal conductivity of the object. An indicator of the ability of a material to transfer heat is known as the thermal conductivity. The heat conductivity coefficient refers to the heat transferred by a 1-square-meter area within a certain time by a material with the thickness of 1m and the temperature difference of the two side surfaces of 1 degree under the condition of stable heat transfer. One of the methods for testing the thermal conductivity of materials that is widely used at present is the steady state method. The principle of the steady state method is that the heat conductivity coefficient is calculated according to the heat flow density, the temperature difference at two sides and the thickness of a sample according to a Fourier one-dimensional steady state heat conduction model by utilizing the equilibrium state that the heat transfer rate is equal to the heat dissipation rate in the stable heat transfer process. The calculation formula is as follows:
wherein Q is the heat flux through the sample per unit time; a is the effective area of the sample in the measurement area; the variable d is the thickness of the sample; t ishThe hot plate temperature; t iscIs the cold plate temperature.
Referring to fig. 1, a thermal conductivity testing apparatus for obtaining a temperature of a hot plate and a temperature of a cold plate in a steady-state test includes a heating disc 3, a heat-dissipating disc 4, a supporting member 5, and a pressure device 2. Wherein the heating disc 3 is provided with a heater for electric heating; the heating disc 3 and the radiating disc 4 are made of materials with good heat conducting performance; the support piece 3 is placed on a test bed, the heat dissipation disc 4 is fixed on the support piece 5, the heat generation disc 3 is opposite to the heat dissipation disc 4, and the pressure device 2 is connected with the heat generation disc 3 and applies pressure to the heat generation disc 3 through the pressure device 2.
The steps of using the thermal conductivity testing device to obtain the temperature of the hot plate and the temperature of the cold plate comprise the following steps:
s1: the test specimen 1 was placed between the heat-generating disk 3 and the heat-dissipating disk 4.
S2: applying pressure to the pressure device 2, and the support 5 supporting, so that the heating disc 3 and the heat dissipation disc 4 clamp the test sample 1; preferably, the upper and lower surfaces of the test specimen 1 are in close contact with the heat emitting disk 3 and the heat dissipating disk 4, respectively.
S3: energizing the heater of the heating disc 3 to heat the same; heat is transferred from the upper surface of the test specimen 1 and dissipated from the lower surface toward the heat sink disk 4 until a steady state is reached.
S4; the temperature of the heating disk 3 is measured as the temperature T of the hot plate using a thermometer or the likehThe temperature of the heat dissipation disc 4 is taken as the temperature T of the cold platecAnd substituting the heat conductivity coefficient into a calculation formula to calculate the heat conductivity coefficient.
Above-mentioned thermal conductivity testing arrangement is because the influence of cost and operability, the fuselage height can not set up too high, consequently strutting arrangement and pressure device can not do very big lift adjustment by a wide margin, that is to say, the dish that generates heat can not separate great distance with the heat dissipation dish, consequently place test sample in the in-process of heat dissipation dish, because the dish that generates heat is little with the heat dissipation dish distance, the dish that generates heat that is located the upper end will seriously block the sight, make there be visual deviation, be unfavorable for the observation, operating personnel hardly judges test sample whether completely by the heat dissipation dish and the dish that generates heat covers. Further, in the testing process, the flatness and the integral uniformity of the surface of the testing sample cannot be accurately evaluated when the heating plate is pressed to the testing sample, and whether the upper surface and the lower surface of the testing sample are in close contact with the heating plate and the heat dissipation plate or not cannot be judged, so that the testing result has deviation. In addition, the test sample may be the material that easily drops such as graphite, need clean after the test finishes, nevertheless because the sight obstacle, can't judge at the in-process of clearance whether clean up, whether have the test sample to bond on dish and the heat dissipation dish that generates heat to influence the result of test next time, long-term adhesion can also cause the corruption to testing arrangement moreover, influences coefficient of heat conductivity testing arrangement's life.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to provide a can realize generating heat dish and the adjustable coefficient of heat conductivity testing arrangement of the position of staggering each other of heat dissipation dish to improve heat conduction test effect.
The utility model discloses a following technical scheme realizes:
an adjustable thermal conductivity testing device comprises
The supporting device is used for supporting each device on the heat conductivity coefficient testing device;
the heating device is arranged on the supporting device and comprises a heater, a hot end temperature detection unit for detecting temperature and a heating disc, and the heater and the hot end temperature detection unit are arranged in the heating disc;
the heat dissipation device is arranged on the supporting device and can be close to or separated from the heating device; the heating device comprises a cold end temperature detection unit for detecting temperature and a heat dissipation disc opposite to and parallel to the heating disc, wherein the cold end temperature detection unit is arranged in the heat dissipation disc;
the adjustable device comprises a sliding rod, a sliding clamp, a rotating rod and a fixing frame; the sliding rod is arranged on the supporting device, and the sliding clamp is sleeved on the sliding rod and moves or rotates along the sliding rod; the rotating rod is connected between the sliding clamp and the fixing frame; the heating plate or the heat dissipation plate is arranged on the fixing frame.
Compared with the prior art, the utility model discloses an adjustable coefficient of heat conductivity testing arrangement has reduced the various harmful effects that cause because of the visual disturbance through rotatable, dismantlement and the adjustable device of lift. The relative position of the heating disc and the heat dissipation disc is adjusted through the adjustable device, so that the heating disc and the heat dissipation disc can both cover the test sample clamped between the heating disc and the heat dissipation disc, the test sample is further clamped through fine adjustment of the distance between the heating disc and the heat dissipation disc, and the test sample is well attached to the heating disc and the heat dissipation disc, so that the test effect is improved; after the test is finished, the heating plate or the radiating plate is rotated out through the adjustable device, so that the heating plate and the radiating plate are staggered with each other, and the test device is convenient to clean.
Further, the adjustable device further comprises a rotating clamp, and the rotating clamp is mounted on the sliding clamp; the dwang is L type pole, and one end installation in the rotating jig, and the duplex winding rotates, the other end with the mount is connected. The adjustable heat conductivity coefficient testing device is provided with multiple adjusting modes by arranging the rotating clamp, so that the adjustable heat conductivity coefficient testing device is suitable for various conditions.
Further, the adjustable device further comprises a pushing device, and the pushing device pushes the sliding rod to move up and down. The automatic fine adjustment of the distance between the heating plate and the heat dissipation plate is realized through the pushing device.
Further, the device also comprises a power device; the supporting device comprises an upright post, a fixed plate and a movable plate, the fixed plate is fixedly arranged on the upright post, the movable plate is movably arranged on the upright post and can move along the upright post, the heating device and the heat dissipation device are respectively arranged on the fixed plate and the movable plate, and the heating plate and the heat dissipation plate are close to or separated from each other along with the movement of the movable plate; the power device pushes the movable plate to move. The automatic adjustment of the distance between the heating disc and the heat dissipation disc is realized through the power device.
The main control device is electrically connected with the heater of the heating device, the hot end temperature detection unit, the cold end temperature detection unit of the heat dissipation device, the pushing device and the power device, and controls the heater of the heating device, the pushing device and the power device to work and calculates and analyzes the temperature values detected by the hot end temperature detection unit and the cold end temperature detection unit. The full automation of the heat conductivity coefficient testing process is realized through the main control device.
The device further comprises a pressure detection device, wherein the pressure detection device comprises a spring, a telescopic rod and a pressure sensor; the supporting device further comprises a telescopic plate, and the heating device and the heat dissipation device are respectively arranged on the telescopic plate and the movable plate; the telescopic rod is connected between the telescopic plate and the fixed plate and can stretch out and draw back; the spring is sleeved on the telescopic rod, the pressure sensor is arranged between the fixed plate and the spring to detect the elastic force of the spring during compression, and the pressure sensor is electrically connected with the main control unit. The distance between the heating plate and the heat dissipation plate is controlled by the pressure applied to the test sample through the pressure detection device.
Further, still include displacement sensor, displacement sensor sets up in order to detect on the fly leaf the displacement volume of fly leaf, displacement sensor with the main control unit electricity is connected. The detection and control of the distance between the heating plate and the heat dissipation plate are realized through the displacement sensor.
Furthermore, the heating device also comprises a hot end limiting column, a hot end heat-insulating layer and a hot end stainless steel sleeve; one end of the hot end limiting column is fixed on the telescopic plate, the heating disc is installed at the other end of the hot end limiting column, the hot end heat preservation layer is arranged on the outer sides of the hot end limiting column and the heating disc, and the hot end stainless steel sleeve is sleeved on the outer side of the hot end heat preservation layer. The hot end limiting column plays a limiting role, and the influence of the external temperature on the test is reduced under the action of the hot end heat insulation layer, so that the test effect is improved.
Furthermore, the heat dissipation device also comprises a cold end limiting column, a cold end heat insulation layer and a cold end stainless steel sleeve; spacing post one end of cold junction is fixed on the fly leaf, cold and hot dish sets up the other end of the spacing post of cold junction, the cold junction heat preservation sets up the spacing post of cold junction and the outside of heat dissipation dish, cold junction stainless steel sleeve cover is established the cold junction heat preservation outside. The cold end limiting column plays a limiting role, and the influence of the external temperature on the test is reduced under the effect of the cold end heat insulation layer, so that the test effect is improved.
Further, the power device is a hydraulic pump or an air pump; the pushing device is a push rod motor or a screw rod stepping motor.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a prior art thermal conductivity testing apparatus;
FIG. 2 is a schematic structural view of the adjustable thermal conductivity testing apparatus of the present invention;
fig. 3 is a schematic structural diagram of the adjustable device of the present invention.
Detailed Description
The utility model discloses an adjustable coefficient of thermal conductivity testing arrangement is in order to reduce the harmful effects because of the visual disturbance causes on the adjustable device through rotatable, dismantlement and lift.
Specifically, referring to fig. 2, the adjustable thermal conductivity testing apparatus of the present invention includes a heat generating device 10, a heat dissipating device 20, a supporting device 30, a pressure detecting device 40, an adjustable device 50, a power device 60, and a main control device (not shown) electrically connected to the devices. The heating device 10 and the heat dissipation device 20 are both made of materials with good heat conductivity and provided with temperature detection devices such as thermometers, and preferably made of copper; a heater is arranged in the heating device 10 and can perform electric heating; the heating device 10 and the heat dissipation device 20 are arranged in parallel relatively, and during testing, the test sample 1 is arranged between the heating device 10 and the heat dissipation device 20. The supporting device 30 is disposed on a test platform, and the heat generating device 10 and the heat dissipating device 20 are mounted on the supporting device 30 and can be close to or separated from each other along the supporting device 30. The power device 60 drives the supporting device 30 to move the heat generating device 10 and the heat dissipating device 20 close to or away from each other. The pressure detecting device 40 is mounted on the supporting device and detects a pressure between the heat generating device 10 and the heat dissipating device 20. The adjustable device 50 is mounted on the supporting device 30, the heating device 10 or the heat dissipation device 20 is connected with the adjustable device 50, and the distance and the pressure are adjusted through the adjustable device 50; in this embodiment, the heat dissipation device 20 is connected to the adjustable device 50. The main control device is a computer terminal, and respectively controls each device to work, and reads the temperature values detected by the heating device 10 and the heat dissipation device 20, and performs analysis and calculation to calculate the heat conductivity coefficient.
The heating device 10 includes a heating plate 100, a hot-end limiting pillar 110, a hot-end insulating layer 120, a hot-end stainless steel sleeve 130, a heater (not shown), and a hot-end temperature detecting unit (not shown). One end of the hot end limiting column 110 is fixed on the supporting device 30 and limits the heating plate 100. In this embodiment, the heating plate 100 is fixed on one side of the hot-end limiting column 110 close to the heat dissipation device 20, and the hot-end heat preservation layer 120 is disposed on the outer sides of the heating plate 100 and the hot-end limiting column 110 for heat preservation so as to reduce heat exchange between the heating plate 100 and the outside, thereby improving temperature stability and test accuracy. The hot end stainless steel sleeve 130 is sleeved on the hot end insulating layer 120 to fix the hot end insulating layer 120; the heater electrically heats the heating plate 100; the hot end temperature detection unit detects the temperature of the heating plate 100, the hot end temperature detection unit is a thermometer or an electronic temperature sensor, the reading of the hot end temperature detection unit can be directly read by an operator, or the hot end temperature detection unit is electrically connected with the main control unit, and the detected temperature value is directly sent to the main control device for analysis and calculation.
The heat dissipation device 20 includes a heat dissipation plate 200, a cold-end limiting column 210, a cold-end insulating layer 220, a cold-end stainless steel sleeve 230, and a cold-end temperature detection unit (not shown). In this embodiment, the heat dissipation plate 200 is connected to the adjustable device 50 and can be adjusted in position by the adjustable device 50; the cold end limiting column 210 is installed on the supporting device 30 and limits the heat dissipation plate 200. Cold junction heat preservation 220 sets up in the outside of heat dissipation dish 200 and the spacing post of cold junction 210 is in order to reduce heat dissipation dish 200 takes place to carry out the heat exchange with the external world to improve temperature stability and experimental accuracy. The cold end stainless steel sleeve 230 is sleeved on the cold end insulating layer 220 to fix the cold end insulating layer 220; cold junction temperature detecting element detects the temperature of heat dissipation dish 200, cold junction temperature detecting element is thermometer or electronic type temperature sensor, can directly read its reading by operating personnel, again or with the main control unit electricity is connected, and the temperature value that detects the gained directly sends main control unit carries out the analysis and calculation.
The supporting device 30 includes a base 300, a column 310, a movable plate 320, and a fixed plate 330. The base 300 is used for supporting the adjustable thermal conductivity testing device of the heat dissipation plate, which is a flat plate placed on a horizontal plane in this embodiment. The upright 310 is vertically fixed on the base 300. The movable plate 320 is movably mounted on the column 310 through a bearing housing and can move up and down along the column. The fixed plate 330 is parallel to the movable plate 320, and the column 310 passes through both the fixed plate 330 and the movable plate 320; the heat generating device 10 and the heat dissipating device 20 are respectively mounted on the movable plate 320 and the fixed plate 330. In this embodiment, the cold-end-limiting column 210 of the heat dissipation device 20 is mounted on the movable plate 320, the heat dissipation plate 200 is disposed on a side of the cold-end-limiting column 210 away from the movable plate 320, and the movable plate 320 moves up and down along the upright column 310 under the driving of the power device 60, and the heat dissipation device 20 moves therewith; the hot-end limiting column 110 of the heating device 10 is fixedly mounted on the fixing plate 330, and the heating plate 100 is fixedly mounted on one side of the hot-end limiting column 110 close to the heat dissipation plate 200.
Further, the supporting device 30 further includes a retractable plate 340, the retractable plate 340 is parallel to the fixing plate 330 and is mounted on the fixing plate 330 through the pressure device 40, the retractable plate 340 is close to or away from the fixing plate 330 under the action of an external force, and preferably, the retractable plate 340 is mounted on the upright 310 through a bearing sleeve and moves along the upright 310. Preferably, the two columns 310 are disposed oppositely, and the heat generating device 10 and the heat dissipating device 20 are disposed between the two columns 310.
The pressure detecting device 40 includes a spring 400, a telescopic rod 410, and a pressure sensor 420. The extension bar 410 is vertically connected between the extension plate 340 and the fixing plate 330 and is extendable and retractable. The spring 400 is sleeved on the telescopic rod 410. The pressure sensor 420 is disposed between the spring 400 and the expansion plate 340 to detect a spring pressure, and is electrically connected to the main control device. In this embodiment, when the heat dissipating device 20 presses the heat generating device 10, the expansion plate 340 is pressed toward the expansion link 410, the expansion plate 340 moves toward the expansion link 410 to compress the spring 400, the spring 400 applies an elastic force toward the expansion plate 340 to the expansion plate 340 and acts on the test sample 1 through the expansion plate 340, so that the test sample 1 is pressed between the heat generating plate 100 and the heat dissipating plate 200, and the adhesion between the test sample 1 and the heat generating plate 100 and the heat dissipating plate 200 is increased to improve the testing effect. On the other hand, the pressure sensor 420 detects the elastic force of the spring 400, the larger the compression amount of the spring 400 is, the larger the elastic force received by the expansion plate 340 is, the larger the pressure received by the test sample 1 is, and the main control device adjusts the compression amount of the spring 400 according to the elastic force value detected by the pressure sensor, thereby realizing the pressure control of the test sample 1.
Referring to fig. 2 and fig. 3, the adjustable device 50 includes a pushing device 500, a sliding rod 510, a sliding clamp 520, a rotating clamp 530, a rotating rod 540, and a fixing frame 550. In this embodiment, the pushing device 500 is installed on the movable plate 320 and at the same side as the heat dissipation device 20, and is a power device capable of pushing the rod body to make a linear motion, such as a push rod motor, a screw rod stepping motor or a pump body, and the pushing device 500 is electrically connected to the main control device, and under the control of the main control device, the rod body is pushed to make a linear motion. The sliding shaft 510 is installed on the movable plate 320 and is perpendicular to the heat generating plate 100 and the heat dissipating plate 200. The sliding clamp 520 is sleeved on the sliding rod 510 and is fixed by propping against the sliding rod 510 through screws and the like; the slide clamp 520 is fixed on the slide bar 510 when the screw is tightened, and the slide clamp 520 can move up and down along the slide bar 510 or rotate around the slide bar 510 when the screw is loosened; the sliding rod 510 is a rod body and is installed on the pushing device 500, and moves up and down linearly under the pushing of the pushing device 500, and the sliding clamp 520 clamped on the sliding rod 510 moves up and down accordingly. The rotating clamp 530 is mounted on the sliding clamp 520 and moves therewith. The rotating rod 540 is connected with one end of the rotating clamp 530, the fixing frame 550 is arranged at the other end of the rotating rod 540, the heating plate 100 or the heat dissipation plate 200 is arranged on the fixing frame 550, and the heating plate 100 and the heat dissipation plate 200 are parallel to each other. In this embodiment, the rotating rod 540 is an L-shaped rod, one end of which is clamped in the rotating clamp 530 by a screw or the like, and the fixing bracket 550 is connected to the other end of the rotating rod 540, so that when the sliding clamp 520 rotates around the sliding rod 510, or the rotating rod 540 rotates around the rotating clamp 530, the fixing bracket 550 rotates therewith.
The power device 60 is a hydraulic and pneumatic pump body, is disposed between the base 300 and the movable plate 320 and electrically connected to the main control device, and pushes the movable plate 320 to move up and down along the upright 310 under the control of the main control device.
Further, a displacement sensor 70 is disposed between the movable plate 320 and the fixed plate 330, and the displacement sensor 70 is a linear displacement sensor such as a magnetoelastic displacement sensor or an LVDT displacement sensor, and is electrically connected to the main control device. The displacement sensor 70 detects the displacement of the movable plate 320 and controls the lifting displacement of the movable plate 320 by the main control device.
It should be noted that, the relative positions and connection relationships of the heat generating device 10, the heat dissipating device 20, the supporting device 30 and the adjustable device 50 are only illustrated, and the present invention is not limited thereto, and the adjustment can be made according to actual needs, for example, the heat generating device 10 is connected to the movable plate 320, the heat dissipating device 20 is connected to the fixed plate 330, and the like.
Based on the structure of the testing device for the adjustable heat conduction system, the testing process is specifically described as follows, and the testing device comprises the following steps:
first, by rotating the rotating lever 540 mounted on the rotating jig 530 such that the heat generating tray 100 and the heat dissipating tray 200 are misaligned with each other, the heat dissipating tray 200 is rotated to a position convenient for an operator to observe; placing the test sample 1 on the heat-dissipating plate 200 in the middle of the heat-dissipating plate 200; and then the rotating lever 540 mounted on the rotating jig 530 is rotated so that the test sample 1 is positioned under the heat generating tray 200.
Then, the power unit 60 is activated by the main control device, and the power unit 60 pushes the movable plate 320 to move along the column 310 and approach the heat generating plate 100.
Next, after the test sample 1 approaches the heating plate 100, the main control device controls the power device 60 to stop working. It is observed and determined whether the heat generating plate 100 covers the test sample 1. If yes, carrying out the next step; otherwise, the rotating rod 540 installed on the rotating fixture 530 is rotated to drive the heat dissipation plate 200 to rotate relative to the heat generation plate 100, so as to adjust the relative position of the test sample 1 and the heat generation plate 100, and the heat generation plate 100 also covers the test sample 1.
Next, the main control device activates the pushing device 500 to push the sliding rod 510 to move upward, and the sliding clamp 520 clamped on the sliding rod 510 moves upward, thereby finely adjusting the distance between the heat dissipation plate 200 and the heat generation plate 100.
In one embodiment, the heat dissipation plate 200 drives the test sample 1 to press the heat dissipation plate 100, the heat dissipation plate 100 pushes the expansion plate 340 upwards, so that the spring 400 is elastically deformed and acts on the pressure sensor 420, the pressure sensor 420 detects the elastic force value of the spring and transmits the elastic force value to the main control device, when the elastic force value reaches a required set value, the main control device controls the pushing device 500 to stop working, and the elastic force acts on the test sample 1 through the heat dissipation plate 100, so that the test sample 1 is subjected to a stable pressure value, and thus the pressure control between the heat dissipation plate 100 and the heat dissipation plate 200 is realized.
In another embodiment, the heat generating device 10 is fixed on the fixed plate 330, and the displacement sensor 70 detects the displacement of the movable plate 320. Since the fixed plate 330 is fixed, the distance between the fixed plate 330 and the movable plate 320 is calculated according to the displacement of the movable plate 320, and until the distance reaches a required set value, the main control device controls the power device 60 to stop working, thereby realizing the distance control between the heat generating plate 100 and the heat dissipating plate 200.
Next, the main control device controls the heater of the heating plate 100 to heat the test sample 1 until the temperature values detected by the hot end temperature detection unit and the cold end temperature detection unit are stable values, and calculates the heat conductivity coefficient of the test sample 1 according to the temperature values detected by the hot end temperature detection unit and the cold end temperature detection unit.
Next, the main control device controls the heat dissipation plate 200 to descend onto the cold-end limiting column 210 through the pushing device 500; the main control device controls the power device 60 to move downward, thereby separating the heat generating plate 100 from the heat dissipating plate 200.
Finally, by rotating the rotating lever 540 mounted on the rotating jig 530, the fixing frame 550 is rotated out and the test sample 1 is taken out. Since the heat dissipation plates 200 are staggered from each other with the heat generation plate 100, an operator can directly observe and clean the heat dissipation plates 200 and the heat generation plate 100.
Compared with the prior art, the adjustable device of the utility model enables the heating disc and the heat dissipation disc to be staggered with each other when the test sample is placed so as to reduce the sight line blockage, thus ensuring that the test sample is placed in the middle of the heating disc or the heat dissipation disc, and one end surface of the test sample is tightly attached to the heating disc or the heat dissipation disc; when the test sample is close to the heat dissipation plate or the heating plate, the test sample is adjusted through the adjustable device again to ensure that the other end face of the test sample is also covered by the heat dissipation plate or the heating plate, namely, the two planes of the test sample are attached to the heating plate and the heat dissipation plate by reducing the sight blockage, so that the error of the heat conductivity coefficient test is reduced. On the other hand, the heating plate and the heat dissipation plate are staggered when the test sample is placed through the adjustable device, the device is cleaned after the test is facilitated, the corrosion to the heat conducting device is reduced, and the service life of the heat conducting device is prolonged. In addition, the heat conductivity coefficient testing device is provided with a pressure device and a displacement sensor, and can control the pressure acting on a test sample and the distance between the heating disc and the heat dissipation disc in the testing process so as to meet the testing requirement; the heating plate and the heat dissipation plate can be ensured to be in close contact with a test sample through pressure control.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. An adjustable thermal conductivity testing device comprises
A support device;
the heating device is arranged on the supporting device and comprises a heater, a hot end temperature detection unit for detecting temperature and a heating disc; the heater heats the heating plate; the hot end temperature detection unit detects the temperature of the heating plate;
the heat dissipation device is arranged on the support device and comprises a cold end temperature detection unit for detecting temperature and a heat dissipation disc arranged in parallel with the heating disc; the cold end temperature detection unit detects the temperature of the heat dissipation plate; it is characterized in that the preparation method is characterized in that,
the adjustable device comprises a sliding rod, a sliding clamp, a rotating rod and a fixing frame; the sliding rod is arranged on the supporting device and is vertical to the heating disc and the heat dissipation disc; the sliding clamp is arranged on the sliding rod and moves or rotates along the sliding rod; one end of the rotating rod is fixed on the sliding clamp; the fixed frame is arranged at the other end of the rotating rod; the heating plate or the heat dissipation plate is fixed on the fixing frame; when the sliding clamp moves along the sliding rod, the heating disc and the radiating disc are close to or separated from each other.
2. The adjustable thermal conductivity test apparatus of claim 1, wherein the adjustable apparatus further comprises a rotating fixture, the rotating fixture being mounted on the sliding fixture; the dwang is L type pole, and one end installation in the rotating fixture, and the duplex winding rotates, the mount is connected and is set up the other end of dwang.
3. The adjustable thermal conductivity test apparatus of claim 2, wherein the adjustable apparatus further comprises a pushing device, the pushing device pushes the sliding rod to move up and down.
4. The tunable thermal conductivity testing device of claim 3, further comprising a power device; the supporting device comprises a stand column, a fixed plate and a movable plate; the fixed plate and the movable plate are arranged in parallel; the upright post penetrates through the fixed plate and the movable plate simultaneously, the fixed plate is fixedly arranged on the upright post, and the movable plate is movably arranged on the upright post and can move along the upright post; the heating device, the heat dissipation device and the adjustable device are respectively arranged on the fixed plate and the movable plate, and the heating plate and the heat dissipation plate are close to or separated from each other along with the movement of the movable plate; the power device pushes the movable plate to move.
5. The apparatus of claim 4, further comprising a main control device electrically connected to the heater and the hot end temperature detecting unit of the heat generating device, the cold end temperature detecting unit of the heat dissipating device, the pushing device, and the power device, respectively, wherein the main control device controls the heater, the pushing device, and the power device of the heat generating device to operate, and calculates and analyzes the detected temperature values of the hot end temperature detecting unit and the cold end temperature detecting unit.
6. The adjustable thermal conductivity testing device of claim 5, further comprising a pressure detection device, wherein the pressure detection device comprises a spring, a telescopic rod and a pressure sensor; the supporting device further comprises a telescopic plate, and the telescopic plate is parallel to the fixed plate; the heating device and the heat dissipation device are respectively arranged on the expansion plate and the movable plate; the telescopic rod is connected between the telescopic plate and the fixed plate and can stretch out and draw back; the spring is sleeved on the telescopic rod, the pressure sensor is arranged between the fixed plate and the spring to detect the elastic force of the spring during compression, and the pressure sensor is electrically connected with the main control device.
7. The tunable thermal conductivity testing device of claim 6, further comprising a displacement sensor disposed on the movable plate for detecting the displacement of the movable plate, wherein the displacement sensor is electrically connected to the main control device.
8. The adjustable thermal conductivity testing device of claim 7, wherein the heating device further comprises a hot end limiting column, a hot end insulating layer and a hot end stainless steel sleeve; one end of the hot end limiting column is fixed on the expansion plate or the movable plate, the heating disc is installed at the other end of the hot end limiting column, the hot end heat preservation layer is arranged on the outer sides of the hot end limiting column and the heating disc, and the hot end stainless steel sleeve is sleeved on the outer side of the hot end heat preservation layer.
9. The tunable thermal conductivity testing device of claim 8, wherein the heat dissipation device further comprises a cold end limiting column, a cold end insulating layer and a cold end stainless steel sleeve; spacing post one end of cold junction is fixed the fly leaf or on the expansion plate, the heat dissipation dish sets up the other end of the spacing post of cold junction, the cold junction heat preservation sets up the spacing post of cold junction and the outside of heat dissipation dish, cold junction stainless steel sleeve cover is established the cold junction heat preservation outside.
10. The adjustable thermal conductivity testing device of claim 9, wherein the power device is a hydraulic pump or an air pump; the pushing device is a push rod motor or a screw rod stepping motor.
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| CN202020660038.2U CN212364156U (en) | 2020-04-26 | 2020-04-26 | Adjustable thermal conductivity coefficient testing arrangement |
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| CN202020660038.2U CN212364156U (en) | 2020-04-26 | 2020-04-26 | Adjustable thermal conductivity coefficient testing arrangement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397325A (en) * | 2022-01-20 | 2022-04-26 | 淮安永捷电子科技有限公司 | Device and method for detecting heat dissipation performance of electronic capacitor |
| CN114544701A (en) * | 2022-03-08 | 2022-05-27 | 深圳市利群联发科技有限公司 | Heat conduction material heat conductivity testing device |
| CN115165959A (en) * | 2022-07-07 | 2022-10-11 | 广东墨睿科技有限公司 | Thermal simulation test method, device and system |
| CN114544701B (en) * | 2022-03-08 | 2024-06-04 | 深圳市利群联发科技有限公司 | Device for testing heat conduction performance of heat conduction material |
-
2020
- 2020-04-26 CN CN202020660038.2U patent/CN212364156U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397325A (en) * | 2022-01-20 | 2022-04-26 | 淮安永捷电子科技有限公司 | Device and method for detecting heat dissipation performance of electronic capacitor |
| CN114397325B (en) * | 2022-01-20 | 2023-03-24 | 淮安永捷电子科技有限公司 | Device and method for detecting heat dissipation performance of electronic capacitor |
| CN114544701A (en) * | 2022-03-08 | 2022-05-27 | 深圳市利群联发科技有限公司 | Heat conduction material heat conductivity testing device |
| CN114544701B (en) * | 2022-03-08 | 2024-06-04 | 深圳市利群联发科技有限公司 | Device for testing heat conduction performance of heat conduction material |
| CN115165959A (en) * | 2022-07-07 | 2022-10-11 | 广东墨睿科技有限公司 | Thermal simulation test method, device and system |
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