CN112113996A - Temperature measurement assembly and heat conduction performance testing device - Google Patents
Temperature measurement assembly and heat conduction performance testing device Download PDFInfo
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- CN112113996A CN112113996A CN202010975747.4A CN202010975747A CN112113996A CN 112113996 A CN112113996 A CN 112113996A CN 202010975747 A CN202010975747 A CN 202010975747A CN 112113996 A CN112113996 A CN 112113996A
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 71
- 238000009413 insulation Methods 0.000 claims description 17
- 230000013011 mating Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000004519 grease Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229920001296 polysiloxane Polymers 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012951 Remeasurement Methods 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 238000013522 software testing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a temperature measuring assembly and a heat conducting performance testing device, relates to the technical field of heat conducting tests, and solves the technical problems of long waiting time and low testing efficiency when testing equipment is used for measuring the heat conducting capacity of silicone grease. This temperature measurement subassembly includes temperature measurement body and the heat transfer portion that is used for with the piece contact that awaits measuring, has assembly portion on the temperature measurement body, has the cooperation position in the heat transfer portion, and assembly portion and cooperation position are connected can be with heat transfer portion connect the temperature that the piece that awaits measuring transmitted to heat transfer portion on the temperature measurement body, and assembly portion and cooperation position separation can break away from heat transfer portion from the temperature measurement body. The invention is used for testing the heat conductivity of the material, after testing a piece to be tested, the heat transfer part can be separated from the temperature measuring body, another new heat transfer part is installed for re-measurement, the time is saved, the temperature of the previous heat transfer part can be reduced and cleaned in the testing process, the continuous measurement can be realized, the time for waiting for the temperature reduction of the heat transfer part is reduced, and the testing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of heat conduction tests, in particular to a temperature measuring assembly and a heat conduction performance testing device.
Background
At present, the heat dissipation silicone grease has great application in various industries. Therefore, the heat conducting performance is concerned, and the heat conducting performance is related to the product requirement.
At present, the heat-conducting performance of the heat-dissipating silicone grease is tested frequently, and the applicant finds that the prior art at least has the following technical problems in actual work:
(1) the existing heat-conducting performance testing equipment is large in size, difficult to measure according to objects with different physical states, different shapes and the like, and narrow in application range.
(2) The existing equipment needs to wait for instrument cooling after testing a group of objects, then cleans the test object, and can start the next group of tests, otherwise, the test result is influenced, so the operation steps for measuring the heat conductivity of the silicone grease are troublesome, the waiting time is long, the test efficiency is low, and the progress of the test is delayed.
Disclosure of Invention
The invention aims to provide a temperature measuring assembly and a heat conducting performance testing device, which are used for solving the technical problems of long waiting time and low testing efficiency when the existing testing equipment is used for measuring the heat conducting capacity of silicone grease in the prior art; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a temperature measurement assembly, which comprises a temperature measurement body and a heat transfer part used for being contacted with a piece to be measured, wherein:
the temperature measuring body is provided with an assembly part, the heat transfer part is provided with a matching part, the assembly part is connected with the matching part and can connect the heat transfer part to the temperature measuring body so as to measure the temperature of the element to be measured, which is transferred to the heat transfer part, and the assembly part is separated from the matching part and can separate the heat transfer part from the temperature measuring body.
Preferably, the assembly portion is a positioning member, the positioning member is inserted into the engagement portion to form an engagement structure capable of fixing the heat transfer portion to the temperature measuring body, and the positioning member is pulled out from the engagement portion to separate the heat transfer portion from the temperature measuring body.
Preferably, the assembly part is a positioning rod, and the matching part is a hole or a groove which is formed in the heat transfer part and matched with the positioning component.
Preferably, the temperature measuring body comprises a first temperature sensing bulb in contact with the heat transfer part, the position of the first temperature sensing bulb on the temperature measuring body is adjustable, and the distance between the first temperature sensing bulb and a heat transfer surface, which is arranged on the heat transfer part and is in contact with a piece to be measured, can be changed by adjusting the position of the first temperature sensing bulb.
Preferably, a plurality of placing positions are arranged on the temperature measuring body, the first temperature sensing bulb can be inserted into the placing positions and connected with the heat transfer part, and the distance between the first temperature sensing bulb and the heat transfer surface can be adjusted through selecting the placing positions for fixing the first temperature sensing bulb.
Preferably, the temperature measuring body comprises a first temperature-keeping sleeve, wherein: the heat-insulating sleeve cover is arranged on the periphery of the heat transfer part, and the assembling part penetrates through the first heat-insulating sleeve and the matching part and fixedly connects the first heat-insulating sleeve and the matching part.
The invention also provides a heat-conducting property testing device which comprises a heating assembly used for heating a piece to be tested and the temperature measuring assembly, wherein the temperature measuring assembly and the heating assembly jointly clamp the piece to be tested, and the distance between the temperature measuring assembly and the heating assembly is adjustable.
Preferably, the heat conduction testing device further comprises a rod body and a rotating part, wherein: the rotating part is in threaded connection with the rod body and is simultaneously provided with the bearing sleeve on the temperature measuring component on the rod body, and the rotating part can drive the temperature measuring component to move on the rod body by rotating.
Preferably, the heating assembly includes a heating portion, a heat conduction portion, and a second thermal bulb connected to the heat conduction portion, wherein:
the heating part is connected with the heat conducting part and used for heating the heat conducting part, the heat conducting part is in contact with the piece to be tested, the second temperature sensing bulb is connected with a control assembly, and the control assembly is electrically connected with the heating part and used for controlling the heating temperature of the heating part according to a temperature signal transmitted by the second temperature sensing bulb.
Preferably, the heating assembly further comprises a second heat insulation sleeve, the second heat insulation sleeve is covered on the periphery of the heat conduction portion, and the second temperature sensing package is fixed on the second heat insulation sleeve and the position of the second temperature sensing package on the second heat insulation sleeve is adjustable.
Preferably, the heating part is rod-shaped, an installation position is arranged on the heat conduction part, the heating part penetrates through the second heat insulation sleeve and extends into the installation position to be connected with the heat conduction part in an internal mode, and the heating part is pulled out from the installation position to be separated from the heat conduction part.
Compared with the prior art, the temperature measuring assembly and the heat conducting property testing device provided by the invention have the following beneficial effects: the heat transfer part can be connected to the temperature measuring body through the matching of the assembly part and the matching part on the heat transfer part, the temperature of the part to be measured, which is transmitted to the heat transfer part, can be separated from the temperature measuring body by separating the matching part on the assembly part and the heat transfer part, after the part to be measured is measured, the heat transfer part can be separated from the temperature measuring body, another new heat transfer part is installed for remeasurement, the time is saved, the last heat transfer part can be cooled and cleaned in the test process, the continuous measurement can be realized, the time for waiting for the temperature reduction of the heat transfer part is reduced, and the test efficiency is improved. The heat-conducting performance testing device has the advantages of reducing waiting time and improving testing efficiency due to the temperature measuring assembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of a thermal conductivity testing apparatus according to the present invention;
FIG. 2 is a side view of a thermal conductivity testing apparatus;
FIG. 3 is a front view of the thermal conductivity testing apparatus;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3, showing the assembled structure of the thermometric assembly and the heating assembly;
in the figure 11, a heat transfer part; 111. a mating portion; 12. an assembling portion; 13. a first bulb; 14. placing bits; 15. a first heat preservation sleeve; 21. a heat conducting portion; 22. a heating section; 23. a second bulb; 24. an accommodation site; 25. a second insulating sleeve; 26. an installation position; 3. a rotation part; 4. a rod body; 41. a chute; 5. a slideway; 6. an electric cabinet; 61. a display screen.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment 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 present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a temperature measurement assembly for clamping a to-be-tested piece together with a heating assembly in a thermal conductivity testing apparatus, the temperature measurement assembly includes a temperature measurement body and a heat transfer portion 11 for contacting the to-be-tested piece, wherein:
the temperature measuring body is provided with an assembling part 12, the heat transfer part 11 is provided with a matching part 111, the assembling part 12 is connected with the matching part 111 to connect the heat transfer part 11 to the temperature measuring body so as to measure the temperature of the element to be measured transferred to the heat transfer part 11, and the assembling part 12 is separated from the matching part 111 to separate the heat transfer part 11 from the temperature measuring body.
The temperature measurement component in this embodiment, can connect heat transfer portion 11 on the temperature measurement body through the cooperation of cooperation position 111 on assembly portion 12 and the heat transfer portion 11, measure the temperature that awaits measuring the piece and transmit to heat transfer portion 11, and the separation of cooperation position 111 can break away from heat transfer portion 11 from the temperature measurement body on assembly portion 12 and the heat transfer portion 11, after having surveyed a piece, can break away from heat transfer portion 11 from the temperature measurement body earlier, install another new heat transfer portion 11 and measure again, time saving, can be in test process equal last heat transfer portion 11 cooling, the clearance, can realize continuous measurement, the time of waiting for heat transfer portion 11 cooling has been reduced, the efficiency of software testing is improved.
The heat transfer portion 11 has a rod-like structure, and a metal rod having good heat conductivity is selected, and the metal material is preferably a copper material such as red copper or beryllium copper. Since the heat transfer rod can transfer heat to the object to be measured after contacting the object, it is preferable that the heat transfer rod does not contact the heat transfer portion 11 when the heat transfer rod is detached from the temperature measuring body. In view of the above, as an alternative embodiment, referring to FIGS. 3 and 4, the mounting portion 12 in this embodiment is a positioning member, the positioning member is inserted into the fitting portion 111 to form a fitting structure capable of fixing the heat transfer portion 11 to the temperature measuring body, and the positioning member is pulled out from the fitting portion 111 to separate the heat transfer portion 11 from the temperature measuring body.
When the heat transfer part 11 needs to be fixedly connected to the temperature measuring body, the assembling part 12 (positioning component) is inserted into the matching part 111 on the heat transfer part 11; when the tested heat transfer part 11 needs to be detached from the temperature measuring body, the fitting part 12 (positioning member) is pulled out from the fitting part 111. The whole process does not need to contact the heat transfer part 11, and the damage to an operator caused by the overhigh temperature of the heat transfer part 11 is prevented. And the fixing structure is stable, and the smooth proceeding of the test can be ensured.
As an alternative embodiment, referring to fig. 3 and 4, the mounting portion 12 in this embodiment is a positioning rod, and the engagement portion 111 is a hole or a groove formed on the heat transfer portion and matching with the positioning member.
The fixing of the heat transfer part 11 on the temperature measuring body can be realized by inserting the positioning rod into the hole or the groove, and when the positioning part (the assembling part 12) needs to be disassembled, the rod-shaped positioning part (the assembling part 12) is pulled out, so that the use is convenient and the operation is simple.
In order to realize the measurement of the temperature of the heat transfer part 11, as an alternative embodiment, referring to fig. 3 and 4, the temperature measuring body comprises a first thermal bulb 13 contacting with the heat transfer part 11, and the first thermal bulb 13 can be a temperature sensor for detecting the temperature transferred from the surface of the to-be-measured object to the heat transfer part 11; the position of the first temperature sensing bulb 13 on the temperature measuring body can be adjusted, and the distance between the first temperature sensing bulb 13 and a heat transfer surface on the heat transfer part 11, which is used for being in contact with a piece to be measured, can be changed by adjusting the position of the first temperature sensing bulb.
Because the heat conductivity of different to-be-measured parts is different, when the heat conductivity of the material is good, the first temperature sensing bulb 13 can be adjusted to be in a position far away from the to-be-measured part for temperature measurement, the measurement time is long, and the measurement error can be reduced compared with that in a position close to the to-be-measured part. On the contrary, when the heat conductivity of the material is poor, the first thermal bulb 13 can be adjusted to a position close to the to-be-measured piece.
As an alternative embodiment, referring to fig. 3 and 4, a plurality of placing positions 14 (3 in the figure) are arranged on the temperature measuring body, the first thermal bulb 13 can be inserted into the placing positions 14 to be connected with the heat transfer part 11, and the distance between the first thermal bulb 13 and the heat transfer surface can be adjusted by selecting the placing positions 14 for fixing the first thermal bulb 13.
As shown in fig. 4, the placement locations 14 are holes capable of accommodating the first thermal bulb 13, and a plurality of holes are arranged at intervals along the extending direction of the heat transfer portion 11, so that the distance between the first thermal bulb 13 and the heat transfer surface on the heat transfer rod can be adjusted by placing the first thermal bulb 13 in different placement locations 14. The heat transfer surface is a surface of the heat transfer portion 11 for contacting the object to be measured.
As an optional embodiment, the thermometric body comprises a first insulating sheath 15, wherein: the heat insulating sleeve covers the periphery of the heat transfer part 11, and the assembling part 12 penetrates through the first heat insulating sleeve 15 and the matching part and fixedly connects the two parts. When the heat exchanger needs to be disassembled, the assembling part 12 (positioning component) is pulled out from the matching part 111, so that the first heat-preserving sleeve 15, the assembling part 12 and the heat transfer part 11 can be separated, the operation is convenient, and the heat transfer part 11 and the assembling part 12 can be replaced in time.
The first heat preservation portion can play a heat preservation role, heat of the heat transfer portion 11 is prevented from being transferred and radiated from the periphery, and the accuracy of testing is guaranteed. The first heat-insulating sleeve 15 can be made of various materials, and can also be made of multiple layers, such as an aluminum silicate fiber layer, an aerogel heat-insulating layer, an external supporting layer and the like.
Example 2
Referring to fig. 1-4, the embodiment provides a heat conductivity testing apparatus, which includes a heating assembly for heating a to-be-tested member and the temperature measuring assembly, the temperature measuring assembly and the heating assembly clamp the to-be-tested member together, and the distance between the temperature measuring assembly and the heating portion 22 is adjustable.
The heating component is contacted with one surface of the piece to be measured and used for heating the piece to be measured; the temperature measuring component is in contact with the other surface of the piece to be measured, and is used for measuring the temperature of the piece to be measured transmitted to the set position of the heat transfer part 11 and then testing the heat conducting performance of the piece to be measured, wherein the two surfaces are opposite surfaces on the piece to be measured. Specifically, the temperature measuring component in this embodiment is in contact with the upper surface of the to-be-measured member, and the heating component is in contact with the lower surface of the to-be-measured member.
The heat-conducting performance testing device has the advantages of reducing waiting time and improving testing efficiency due to the temperature measuring assembly. Meanwhile, the distance between the temperature measuring component and the heating component in the heat conductivity testing device can be adjusted according to the difference of the to-be-tested piece, and the device can be suitable for testing the heat conductivity coefficients of different materials (different thicknesses).
In order to adjust the distance between the temperature measuring component and the heating component, as an alternative embodiment, referring to fig. 1-4, the thermal conductivity testing apparatus further includes a rod 4 and a rotating part 3, wherein: the rotating part 3 is in threaded connection with the rod body 4 and simultaneously supports the temperature measuring component sleeved on the rod body 4, and the temperature measuring component can be driven to move on the rod body 4 by rotating the rotating part 3.
Above-mentioned 4 vertical settings of body of rod, this structure has realized that temperature measuring component is portable in vertical direction to in the common centre gripping piece that awaits measuring of heating element cooperation.
The rotating part 3 is provided with a graduated scale for detecting the distance between the temperature measuring component and the heating component, and the rotating part 3 is rotated on the rod body 4, so that the temperature measuring component and the heating component clamp the to-be-detected piece and can read the thickness of the to-be-detected piece at the same time, and a temperature and time change curve can be conveniently calculated and drawn. Specifically, the rotating part 3 may be a spiral distance meter.
During testing, for the pasty object to be tested, the distance can be ensured to be set to be a certain thickness, such as 0.2mm or 0.5mm, by adjusting the rotating part 3, then the measurement is started, and the measurement is more accurate; for a solid object to be measured, a part to be measured is clamped between the temperature measuring component and the heating component, specifically, the part to be measured is clamped between the heat transfer part 11 and the heat transfer part 21, the thickness of the part to be measured is recorded, and then measurement is started.
The rod 4 of this embodiment does not necessarily have to be cylindrical, and the spiral distance meter may be changed to electronic distance measurement, and is not limited herein.
As an optional implementation manner, the heat conduction performance testing device further comprises a slide way 5 extending along the horizontal direction, a sliding groove 41 matched with the slide way 5 is arranged at the bottom of the rod body 4, and the matching structure of the sliding groove 41 and the slide way 5 can enable the temperature measuring assembly to move in the horizontal direction.
The cross section of the slide way 5 can be in various shapes such as an ellipse and a rectangle, the slide way is convenient to slide, friction is reduced, and the service life is long.
The heating component can be fixedly arranged, the temperature measuring component can slide on the slide way 5 in the horizontal direction, the temperature measuring component and the heating component can be aligned to clamp a to-be-tested piece together, when the heat transfer part 11 needs to be replaced after testing is finished, the temperature measuring component can be moved out from the upper part of the heating component by moving the temperature measuring component on the slide way 5, the assembling part 12 is pulled out from the matching part 111 of the heat transfer rod, the heat transfer part 11 is separated from the temperature measuring body, and another new heat transfer part 11 is replaced.
As an alternative embodiment, referring to fig. 1 to 4, the heating assembly includes a heating portion 22, a heat conduction portion 21, and a second bulb 23 connected to the heat conduction portion 21, wherein:
the heating part 22 is connected with the heat conducting part 21 and used for heating the heat conducting part 21, the heat conducting part 21 is in contact with the piece to be tested, the second thermal bulb 23 is connected with a control component, and the control component is electrically connected with the heating part 22 and used for controlling the heating temperature of the heating part 22 according to a temperature signal transmitted by the second thermal bulb 23. And the control component is connected with the first bulb 13 and is used for receiving the temperature signal of the heat transfer part 11 transmitted by the first bulb 13.
As shown in fig. 1 and 4, the heating portion 22 and the heat conductive portion 21 in the present embodiment are each of a rod-like structure. The control assembly can be arranged in an electric cabinet 6 positioned at the lower part of the heating assembly, and comprises a controller (a single chip microcomputer and the like) which can control the power of the heating part 22 according to the temperature signal of the heat conducting part 21 fed back by the second temperature sensing bulb 23, so that the temperature constancy of the heat conducting part 21 is ensured. Meanwhile, the temperature change trend of the corresponding thermal bulb along with time can be recorded, the heat conductivity of the to-be-tested piece can be conveniently measured, and the testing accuracy is ensured.
As an optional embodiment, the controller is further electrically connected with a display module for displaying the temperature data transmitted by the first thermal bulb 13 and the second thermal bulb 23; preferably, the controller is further connected with a storage module for storing data input by the first thermal bulb and the second thermal bulb at each time point; a calculation module may be further provided, which can derive the corresponding data import formula in the storage module to directly calculate the temperature difference, etc., or directly display the drawn curve, etc. on a display module, which may be the display screen 61. The structure can improve the automation degree of the whole heat-conducting performance testing device.
As an optional embodiment, the heating assembly further comprises a second thermal insulation sleeve 25, the second thermal insulation sleeve 25 is covered on the periphery of the heat conduction part 21, and the second thermal bulb 23 is fixed on the second thermal insulation sleeve 25 and the position of the second thermal bulb on the second thermal insulation sleeve 25 is adjustable.
The second insulating sheath 25 is used for preventing the heat dissipation of the heat conducting part 21 from influencing the test of the heat conducting performance. The heat conducting portion 21 may be a heat conducting rod, preferably, a red copper material or a beryllium copper material, etc., and has a high heat conductivity, but is not limited herein; the second heat-insulating sleeve 25 can be made of various materials and multiple layers, and has good package card heat-insulating effect and good stability. When the temperature rises, the heat conducting rod made of red copper materials expands, and the second heat insulation sleeve 25 with a multi-layer structure can be matched with the heat conducting rod to keep the heat conducting rod and the heat insulation sleeve tightly combined.
The second bulb 23 is also a temperature sensor in the same manner as the first bulb 13. The second heat preservation sleeve 25 is provided with a plurality of accommodating positions 24 (3 in the figure) which are arranged at intervals and used for fixing the second thermal bulb 23, the second thermal bulb 23 is fixed by selecting the accommodating positions 24 at different positions, the position of the second thermal bulb 23 can be adjusted according to the heat conductivity of a piece to be tested, the piece to be tested with good heat conductivity can be placed at a position far away from the piece to be tested, and the testing accuracy is ensured.
As an alternative embodiment, the heating portion 22 is rod-shaped, the heat conducting portion 21 has a mounting position 26, the heating portion 22 extends into the mounting position 26 through the second thermal insulation sleeve 25 to be connected with the heat conducting portion 21, and the heating portion 22 is pulled out from the mounting position 26 to be separated from the heat conducting portion 21.
The heat conducting part 21 in this embodiment is also detachable in the second heat insulating sleeve 25, the structure is such that the heating part 22 is inserted into the mounting position 26 of the heat conducting part 21 through the second heat insulating sleeve 25 to connect the second heat insulating sleeve 25, the heating part 22 and the heat conducting part 21, and the heating part 22 is pulled out from the mounting position 26 to separate the two parts, which is convenient for operation and timely replacement of the heat conducting part 21 or the heating part 22.
In the present embodiment, the cross sections of the upper heat transfer portion 11 and the lower heat transfer portion 21 may be circular or polygonal, which facilitates positioning, and the fitting portion 12 is easily inserted into the fitting portion 111 for positioning.
The mounting position 26 in the present embodiment and the fitting position 111 in embodiment 1 need not be provided in the same direction, but may be facing or directed in multiple directions.
The principle of the heat conductivity testing device in the embodiment is as follows: calculated according to the Fourier heat transfer equation:
wherein: wherein q is the heat transfer rate, w; a is the heat conducting area, m2；T1For measuring temperature, T, of heat-transfer parts2The temperature of the heating part is shown, n is the heat transfer distance on the to-be-measured piece in the direction vertical to the heat conduction area, and lambda is the heat conduction coefficient, w/m.K. In this embodiment, according to the fact that the heat of the upper surface of the to-be-measured object is equal to the heat of the heat transfer portion (the heat of the upper surface of the to-be-measured object is transferred to the heat transfer portion for heating the heat transfer portion), the following relationship is obtained:
wherein: ρ is the density of the heat transfer part, V is the volume of the heat transfer part, C is the specific heat capacity of the material of the heat transfer part, T1Since the heat transfer portion is made of copper rod, ρ is the density of the copper rod, V is the volume of the copper rod, C is the specific heat capacity of the copper, and T is the temperature of the heat transfer portion1Can be measured by the first bulb. Measuring corresponding temperature at each time point, and plotting T1T, lambda can be determined.
In the testing process, a certain heat flow (heating component) is applied to the piece to be tested, the thickness of a test sample and the temperature difference between the test component and the heating component (the temperature difference at the positions of the first thermal bulb 13 and the second thermal bulb 23) are drawn, a temperature-time curve is drawn, and the heat conductivity coefficient of the piece to be tested is obtained through calculation.
The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. The utility model provides a temperature measurement subassembly which characterized in that, includes temperature measurement body and the heat transfer portion that is used for with the piece contact that awaits measuring, wherein:
the temperature measuring body is provided with an assembly part, the heat transfer part is provided with a matching part, the assembly part is connected with the matching part and can connect the heat transfer part to the temperature measuring body so as to measure the temperature of the element to be measured, which is transferred to the heat transfer part, and the assembly part is separated from the matching part and can separate the heat transfer part from the temperature measuring body.
2. The thermometric assembly of claim 1, wherein the mounting portion is a positioning member, the positioning member is inserted into the mating portion to form a mating structure that secures the heat transfer portion to the thermometric body, and the positioning member is pulled out of the mating portion to detach the heat transfer portion from the thermometric body.
3. The temperature measuring assembly of claim 2, wherein the mounting portion is a positioning rod, and the engaging portion is a hole or a groove formed in the heat transfer portion and matching with the positioning member.
4. The temperature measuring assembly of claim 1, wherein the temperature measuring body comprises a first thermal bulb contacting the heat transfer portion, the position of the first thermal bulb on the temperature measuring body is adjustable, and the distance between the first thermal bulb and a heat transfer surface of the heat transfer portion for contacting the device to be measured can be changed by adjusting the position of the first thermal bulb.
5. The temperature measuring assembly of claim 4, wherein a plurality of placement locations are disposed on the temperature measuring body, the first thermal bulb can be inserted into the placement locations to be connected with the heat transfer portion, and the distance between the first thermal bulb and the heat transfer surface can be adjusted by selecting the placement locations for fixing the first thermal bulb.
6. The thermometric assembly of claim 1, wherein the thermometric body comprises a first insulating sleeve, wherein: the heat-insulating sleeve cover is arranged on the periphery of the heat transfer part, and the assembling part penetrates through the first heat-insulating sleeve and the matching part and fixedly connects the first heat-insulating sleeve and the matching part.
7. A heat conduction performance testing device, which is characterized by comprising a heating assembly for heating a piece to be tested and the temperature measuring assembly of any one of claims 1 to 6, wherein the temperature measuring assembly and the heating assembly clamp the piece to be tested together, and the distance between the temperature measuring assembly and the heating assembly is adjustable.
8. The heat conduction testing apparatus according to claim 7, further comprising a lever body and a rotating portion, wherein: the rotating part is in threaded connection with the rod body and is simultaneously provided with the bearing sleeve on the temperature measuring component on the rod body, and the rotating part can drive the temperature measuring component to move on the rod body by rotating.
9. The heat conduction performance testing apparatus according to claim 7, wherein the heating assembly includes a heating portion, a heat conduction portion, and a second thermal bulb connected to the heat conduction portion, wherein:
the heating part is connected with the heat conducting part and used for heating the heat conducting part, the heat conducting part is in contact with the piece to be tested, the second temperature sensing bulb is connected with a control assembly, and the control assembly is electrically connected with the heating part and used for controlling the heating temperature of the heating part according to a temperature signal transmitted by the second temperature sensing bulb.
10. The apparatus for testing heat conductivity of claim 9, wherein the heating assembly further comprises a second thermal insulation sleeve, the second thermal insulation sleeve covers the periphery of the heat conducting portion, and the second thermal bulb is fixed on the second thermal insulation sleeve and is adjustable in position on the second thermal insulation sleeve.
11. The apparatus for testing heat conductivity according to claim 9, wherein the heating portion is rod-shaped, a mounting position is provided on the heat conducting portion, the heating portion extends into the mounting position through the second thermal insulation sleeve to be connected with the heat conducting portion, and the heating portion is separated from the heat conducting portion when being pulled out from the mounting position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010975747.4A CN112113996A (en) | 2020-09-16 | 2020-09-16 | Temperature measurement assembly and heat conduction performance testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010975747.4A CN112113996A (en) | 2020-09-16 | 2020-09-16 | Temperature measurement assembly and heat conduction performance testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116202658A (en) * | 2023-04-28 | 2023-06-02 | 苏州英瑞传感技术有限公司 | Testing device, control method thereof and thermosensitive device testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116202658A (en) * | 2023-04-28 | 2023-06-02 | 苏州英瑞传感技术有限公司 | Testing device, control method thereof and thermosensitive device testing method |
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