CN104034753A - Method for detecting heat dissipating property of metal heat dissipation device and testing device thereof - Google Patents
Method for detecting heat dissipating property of metal heat dissipation device and testing device thereof Download PDFInfo
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- CN104034753A CN104034753A CN201410286343.9A CN201410286343A CN104034753A CN 104034753 A CN104034753 A CN 104034753A CN 201410286343 A CN201410286343 A CN 201410286343A CN 104034753 A CN104034753 A CN 104034753A
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Abstract
The invention discloses a method for detecting the heat dissipating property of a metal heat dissipation device and a testing device thereof. The method is characterized in that a detected heat dissipation device is arranged in a cavity, a heated end of the detected heat dissipation device is attached with a steady temperature-controllable heat source to raise the temperature of the heat dissipation device, an airflow cooling heat-dissipating device with controllable temperature and adjustable flow rate is arranged at the heat dissipation part of the heat dissipation device, and the temperature of airflows flowing through the heat dissipation device and heated by the heat dissipation device is recorded; when the heat dissipation device is heated and cooled stably, the temperature of the stably heated airflows represents the comprehensive heat dissipation property of the heat dissipation device, that is, the higher the stable temperature of the heated air flows is, the better of the comprehensive heat dissipation property of the heat dissipation device is under the constant heat source with the same temperature and the same cooling condition, therefore, the comprehensive heat dissipation property of the heat dissipation device is represented and estimated; according to the method, the complex heat dissipating process and the contribution of the physical property parameters of the heat dissipating metal and the structural characteristics of the heat dissipation device to the heat dissipating property of the heat dissipation device are comprehensively considered.
Description
Technical field
The present invention relates to the assessment of a kind of material heat dispersion and method of testing and device, particularly relate to a kind of heat dispersion method of testing and device of heat dissipation metal material, be applied to device heat dissipation technology field.
Background technology
The current develop rapidly along with electronic product, the continuous increase of the quick universal and all kinds of integrated chip power of LED display technique, heat dissipation problem has become an important problem, becomes electronic product development and is difficult to the bottleneck of breaking through.And present stage, for the test of heat radiation original paper also and imperfection, current research both domestic and external mainly concentrates in the measurement of material thermal conductivity and the measurement of thermal diffusion coefficient, but does not also have the very research and development of system specialty for the Thermal Synthetic Testing Platform of multi-form radiating element.In the middle of actual application, by the combination property of the device often of people's concern, and be not the such theoretical value of thermal conductivity.But at present for laboratory, research and development department and detection department, do not have a kind of method and device and can be used for detecting and assessing the various comprehensive heat dispersions for the manufacture of heat sinks electronic products part, metal or radiating element finished product.
Summary of the invention
In order to solve prior art problem, the object of the invention is to overcome the deficiency that prior art exists, a kind of method and proving installation thereof that detects heat dissipation metal device heat dispersion is provided, adopt the analogy method similar to actual conditions, by complicated heat radiation process, the physical parameter of heat radiating metal and the architectural feature of radiating element etc. consider, and by the temperature survey to specified point, thereby reach the comprehensive heat dispersion that characterizes and assess radiating element.
To achieve the above object of the invention, the design of the invention is:
To be detected radiating element is placed in a cavity, the controlled steady thermal source of its heating end and a temperature is fitted radiating element temperature is raise, and the adjustable air-flow cooling heat dissipation device of given radiating element radiator portion one temperature flow-controllable, the gas flow temperature that recorded stream heats through radiating element and by radiating element simultaneously, when being heated, radiating element reaches while stablizing with cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion quality of radiating element when stablizing, under the constant thermal source of uniform temp and equal cooling condition, the comprehensive heat dispersion of the higher radiating element of temperature is better when heated airflow temperature stabilization.Therefore, the present invention can realize the object that characterizes and assess the comprehensive heat dispersion of radiating element.
The design of creating according to the invention described above, the present invention adopts following technical proposals:
A kind of method that detects heat dissipation metal device heat dispersion, heat dissipation metal device to be measured is placed in the cavity of sealing, the controlled steady thermal source of the heating end of heat dissipation metal device to be measured and temperature is fitted, the temperature of heat dissipation metal device to be measured is raise, again the air-flow cooling heat dissipation device that the radiator portion of heat dissipation metal device to be measured is controlled with temperature and flow is adjustable is connected, the heat that the radiator portion of heat dissipation metal device to be measured is distributed is collected by air-flow cooling heat dissipation device completely, recorded stream is through heat dissipation metal device to be measured and by the gas flow temperature of heat dissipation metal device heating to be measured simultaneously, when being heated of heat dissipation metal device to be measured reaches while stablizing with cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion of heat dissipation metal device to be measured when stablizing.
As the preferred technical scheme of the present invention, recorded stream is during through heat dissipation metal device to be measured and by the gas flow temperature of heat dissipation metal device to be measured heating, adopts and is arranged at respectively the temperature data that near flow area arranges respectively the heating end of heat dissipation metal device to be measured and colling end temperature acquisition point is obtained.
The temperature that the controlled steady thermal source of said temperature produces is preferably adjustable within the scope of 30 ~ 500 DEG C.
In the cavity of sealing, near preferably area of space heat dissipation metal device radiator portion to be measured, air-flow cooling radiator make the to flow through gas flow temperature of heat dissipation metal device radiator portion to be measured is preferably adjustable within the scope of 10 ~ 50 DEG C, and makes air flow rate preferably adjustable within the scope of 50 ~ 150L/h.
Heat dissipation metal device to be measured preferably adopts heat radiator or the metal bar for the manufacture of radiating element.
Implement the proving installation that the present invention detects the method for heat dissipation metal device heat dispersion, comprise device cavity and the temperature analysis detection system of sealing, device cavity is divided into by heat insulation wall the separate space that two parts heat intercepts, form left end cavity and right-hand member cavity, heat dissipation metal device to be measured is placed in device cavity, and the heating end of heat dissipation metal device to be measured and radiator portion are laid respectively in left end cavity and right-hand member cavity, temperature analysis detection system is by thermal source, temperature sensor and data acquiring and recording analyser form, thermal source is positioned at the cavity space at the heating end place of heat dissipation metal device to be measured, heating end and the thermal source of heat dissipation metal device to be measured fit, the temperature of heat dissipation metal device to be measured is raise, temperature sensor at least comprises two, one of them temperature sensor is arranged in left end cavity, wherein another temperature sensor is arranged in right-hand member cavity, measure respectively the heating end of heat dissipation metal device to be measured and the temperature of radiator portion, in left end cavity, thermal source adopts a series of resistance wires, the heat that resistance wire generates is by transmitting to copper coin radiation, carry out heat conduction by copper coin to the heating end of heat dissipation metal device to be measured again, heat insulation wall between left end cavity and right-hand member cavity is made up of zirconia brick bat or stupalith, on heat insulation wall, dig the embedded groove matching with heat dissipation metal device peripheral shape to be measured and size, by closely knit heat dissipation metal device to be measured embedding heat insulation wall, temperature analysis detection system also comprises air-flow cooling radiator, the radiator portion of heat dissipation metal device to be measured is connected with air-flow cooling radiator, the heat that the radiator portion of heat dissipation metal device to be measured is distributed is collected by air-flow cooling heat dissipation device completely, air-flow cooling radiator comprises air flow rate control device and air-flow temperature control equipment, the major control of air flow rate control device flows into the flow of the air-flow in right end chamber body from outside, the control of gas flow temperature control device flows into the temperature of the air-flow in right end chamber body from outside, temperature analysis detection system also comprises controller, the temperature that controller control of heat source produces is adjustable, controller is also controlled respectively air flow rate control device and air-flow temperature control equipment simultaneously, the gas flow temperature of radiator portion of heat dissipation metal device to be measured of making to flow through is adjustable, and make air flow rate adjustable.
As improvement technical scheme of the present invention, said apparatus cavity forms assembled moving cavity by left end cavity and right-hand member cavity Moveable assembled, left end cavity is with the closed fixed cavity of heat insulation wall, the sliding wheel that be equipped with left end cavity below can move on guide rail, right-hand member cavity is open type fixed cavity, be specially: in the time testing, open right-hand member cavity by mobile left end cavity, carry out the installation of heat dissipation metal device to be measured, embed after heat insulation wall at heat dissipation metal device to be measured, the left end cavity that fixes heat dissipation metal device to be measured is moved right and docked with right-hand member cavity, and give hold-down ring and O-ring seal set pressure by screwing nut cap, make O-ring seal pass through distortion, by the edge of opening locking of the heat insulation wall of left end cavity one side and right-hand member cavity, left end cavity and right-hand member cavity are combined, in the time completing test, by unscrewing nut cap, hold-down ring and O-ring seal are carried out to release, open right-hand member cavity by mobile left end cavity, carry out dismounting and the replacing of heat dissipation metal device to be measured.
As the improvement of technique scheme, at right-hand member cavity, air flow rate control device is successively by airflow line, draught damper and pneumatic pump are formed by connecting, the gas outlet of airflow line is connected with the air intake opening on right-hand member cavity, on right-hand member cavity, be also provided with exhausr port, also be provided with vortex shedding flow meter near on the airflow line pipeline of right-hand member cavity, the signal output part of vortex shedding flow meter is connected with controller, controller is controlled the air flow rate of the radiator portion of the heat dissipation metal device to be measured of flowing through by controlling draught damper and pneumatic pump, gas flow temperature control device adopts temperature controlled water bath groove, gas is before entering pneumatic pump, by temperature controlled water bath groove, gas is carried out to temperature adjusting in advance.
As the improvement of technique scheme, in right-hand member cavity, be also provided with at least double layer of metal grid screen, in the time testing, air-flow in airflow line input right-hand member cavity is shunted by whole metal gate graticule mesh, the flow through radiator portion of heat dissipation metal device to be measured, air-flow is heated by heat dissipation metal device to be measured, the temperature sensor of measuring the radiator portion temperature of heat dissipation metal device to be measured is arranged between the metal gate graticule mesh of adjacent layer, in the time that the gas flow temperature of the radiator portion of the heat dissipation metal device to be measured of flowing through is constant, controller control of heat source stops energy supply, and control and close temperature controlled water bath groove attemperating unit and pneumatic pump, thereby finish test.
As the improvement of technique scheme, the exhausr port being positioned on the chamber wall of right-hand member cavity arranges near the place of separation of left end cavity and right-hand member cavity.
As the improvement of technique scheme, right-hand member cavity have one be positioned at away from openend air intake opening and 4 exhausr ports, wherein air intake opening diameter is 30 ~ 100mm, and 4 orthogonal thereto symmetry arrangement of exhausr port, diameter of outlet is 1/2nd of air intake opening diameter.
The spacing of adjacent two-layer above-mentioned metal gate graticule mesh is preferably 50 ~ 100mm, and the thickness of the above-mentioned metal gate graticule mesh of individual layer is preferably 10 ~ 50mm, and each layer of above-mentioned metal gate graticule mesh is all preferably disposed on the position apart from air intake opening 100 ~ 200mm.
The cavity perisporium of above-mentioned left end cavity and right-hand member cavity is preferably made up of the ceramic wool or the magnesia brick that accompany refractory layer and lower thermal conductivity in the middle of double-layer stainless steel layer, wherein stainless steel layer thickness is preferably 0.5 ~ 2mm, wherein the thickness of refractory layer is preferably 30 ~ 50mm, is preferably coated with the coating of high temperature resistant lower thermal conductivity in right-hand member cavity.
Preferably on the heating end of heat dissipation metal device to be measured and the binding face of copper coin, be coated with last layer heat-conducting silicone grease, the two tight heat conduction is connected.
The inside diameter of above-mentioned left end cavity and right-hand member cavity is preferably the circular cavity of 250 ~ 400mm, and wherein the circular cavity overall length of right-hand member cavity is preferably 750 ~ 1000mm.
The thickness of above-mentioned copper coin is preferably 5 ~ 10mm.
The thickness of above-mentioned heat insulation wall is preferably 5 ~ 10mm.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. the present invention is under the constant thermal source of uniform temp and equal cooling condition, the principle that during according to heated airflow temperature stabilization, the comprehensive heat dispersion of the higher radiating element of temperature is better is carried out the comprehensive heat dispersion of material and is measured, realize thus the comprehensive heat dispersion that characterizes and assess radiating element, this method synthesis has been considered complicated heat radiation process, the contribution to radiating element heat dispersion such as the physical parameter of heat radiating metal and the architectural feature of radiating element;
2. apparatus of the present invention test platform system is applicable to the comprehensive heat dispersion test and appraisal work to difference heat radiation product, has modular operation, and operational sequence is easy, the simple advantage of experiment equipment;
3. the employing of the present invention analogy method similar to actual conditions, by complicated heat radiation process, the physical parameter of heat radiating metal and the architectural feature of radiating element etc. consider, and by the temperature survey to specified point, thereby reach the seek peace comprehensive heat dispersion of assessment radiating element of earth's surface extremely fast;
4. the present invention can be widely used in the screening of laboratory to heat sinking material, detection department for the assessment of radiating element heat dispersion and design department for unlike material, thereby the radiating element of different shaping carries out the fast detecting optimal design of heat dispersion.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention one proving installation.
Fig. 2 is the cut-open view along A-A line in Fig. 1.
Embodiment
Details are as follows for the preferred embodiments of the present invention:
embodiment mono-:
In the present embodiment, referring to Fig. 1 and Fig. 2, a kind of proving installation that detects heat dissipation metal device heat dispersion, comprise device cavity and the temperature analysis detection system of sealing, device cavity is divided into by heat insulation wall 10 separate space that two parts heat intercepts, form left end cavity 1 and right-hand member cavity 2, heat dissipation metal device 12 to be measured is placed in device cavity, and the heating end of heat dissipation metal device 12 to be measured and radiator portion are laid respectively in left end cavity 1 and right-hand member cavity 2, temperature analysis detection system is by thermal source 8, temperature sensor 21 and data acquiring and recording analyser 22 form, thermal source 8 is positioned at the cavity space at the heating end place of heat dissipation metal device 12 to be measured, the heating end of heat dissipation metal device 12 to be measured and thermal source 8 fit, the temperature of heat dissipation metal device 12 to be measured is raise, temperature sensor 21 comprises two, one of them temperature sensor 21 is arranged in left end cavity 1, wherein another temperature sensor 21 is arranged in right-hand member cavity 2, measure respectively the heating end of heat dissipation metal device 12 to be measured and the temperature of radiator portion, in left end cavity 1, thermal source 8 adopts a series of resistance wires, the heat that resistance wire generates is by transmitting to copper coin 9 radiation, carry out heat conduction by copper coin 9 to the heating end of heat dissipation metal device 12 to be measured again, heat insulation wall 10 between left end cavity 1 and right-hand member cavity 2 is made up of zirconia brick bat or stupalith, on heat insulation wall 10, dig the embedded groove matching with heat dissipation metal device 12 peripheral shape to be measured and size, by closely knit heat dissipation metal device 12 to be measured embedding heat insulation wall 10, temperature analysis detection system also comprises air-flow cooling radiator, the radiator portion of heat dissipation metal device 12 to be measured is connected with air-flow cooling radiator, the heat that the radiator portion of heat dissipation metal device 12 to be measured is distributed is collected by air-flow cooling heat dissipation device completely, air-flow cooling radiator comprises air flow rate control device and air-flow temperature control equipment, the gas that wherein forms air-flow can be the gas of various different atmospheres, the major control of air flow rate control device flows into the flow of the air-flow in right end chamber body 2 from outside, the control of gas flow temperature control device flows into the temperature of the air-flow in right end chamber body 2 from outside, temperature analysis detection system also comprises controller, the temperature that controller control of heat source 8 produces is adjustable, controller is also controlled respectively air flow rate control device and air-flow temperature control equipment simultaneously, the gas flow temperature of radiator portion of heat dissipation metal device 12 to be measured of making to flow through is adjustable, and make air flow rate adjustable.In the present embodiment, the controlled steady thermal source 8 of the built-in temperature of left end cavity 1 of the detection platform system of proving installation, by being many resistance wire energy supplies, heat a copper coin 9, copper coin 9 centers arrange a temperature sensor 21, supply with the watt level of resistance wire thereby copper coin 9 temperature that record by temperature sensor 21 herein and setting value compare to regulate, realizing copper coin 9 becomes a controlled steady thermal source, and the temperature of copper coin 9 is adjustable.The heat dissipation metal device 12 to be measured that the present embodiment device can detect can be by all kinds of metal bars for the manufacture of radiating element, also can be the heat radiator that is designed to various shapes, detect and assess the heat dispersion of various electronic products heat dissipation metal material used for laboratory and detection department.
In the present embodiment, referring to Fig. 1 and Fig. 2, device cavity forms assembled moving cavity by left end cavity 1 and right-hand member cavity 2 Moveable assembleds, left end cavity 1 is with the closed fixed cavity of heat insulation wall 10, the sliding wheel 6 that be equipped with left end cavity 1 below can move on guide rail 7, right-hand member cavity 2 is open type fixed cavity, be specially: in the time testing, open right-hand member cavity 2 by mobile left end cavity 1, carry out the installation of heat dissipation metal device 12 to be measured, embed after heat insulation wall 10 at heat dissipation metal device 12 to be measured, the left end cavity 1 that fixes heat dissipation metal device 12 to be measured is moved right and docked with right-hand member cavity 2, and give hold-down ring 4 and O-ring seal 3 set pressures by screwing nut cap 5, make O-ring seal 3 by distortion, by the edge of opening locking of the heat insulation wall of left end cavity 1 10 1 sides and right-hand member cavity 2, left end cavity 1 and right-hand member cavity 2 are combined, in the time completing test, by unscrewing nut cap 5, hold-down ring 4 and O-ring seal 3 are carried out to release, open right-hand member cavity 2 by mobile left end cavity 1, carry out dismounting and the replacing of heat dissipation metal device 12 to be measured.
In the present embodiment, referring to Fig. 1, at right-hand member cavity 2, air flow rate control device is successively by airflow line 16, draught damper 18 and pneumatic pump 19 are formed by connecting, the gas outlet of airflow line 16 is connected with the air intake opening 14 on right-hand member cavity 2, on right-hand member cavity 2, be also provided with exhausr port 15, also be provided with vortex shedding flow meter 17 near on airflow line 16 pipelines of right-hand member cavity 2, the signal output part of vortex shedding flow meter 17 is connected with controller, controller is controlled the air flow rate of the radiator portion of the heat dissipation metal device 12 to be measured of flowing through by controlling draught damper 18 and pneumatic pump 19, gas flow temperature control device adopts temperature controlled water bath groove 20, gas is before entering pneumatic pump 19, by temperature controlled water bath groove 20, gas is carried out to temperature adjusting in advance.In the present embodiment, referring to Fig. 1, the adjustable air-flow of temperature flow-controllable in right-hand member cavity 2 passes through to open pneumatic pump 19, gas flow is after being dipped in the airflow line of temperature controlled water bath groove 20, enter the cooling heat dissipation metal device 12 to be measured of test chamber, wherein carry out monitoring and the control of air flow rate by draught damper 18 and vortex shedding flow meter 17, the temperature of temperature controlled water bath groove 20 is to regulate and control by thermoelectric semiconductor and the temperature sensor 21 that is placed in the monitoring gas flow temperature in right-hand member cavity 2, thereby it is adjustable to make to enter gas flow temperature and flow in right-hand member cavity 2, the gas that wherein forms air-flow can be the gas of various different atmospheres.
In the present embodiment, referring to Fig. 1, in right-hand member cavity 2, be also provided with double layer of metal grid screen 13, in the time testing, air-flow in airflow line 16 is inputted right-hand member cavity 2 is shunted by whole metal gate graticule mesh 13, the flow through radiator portion of heat dissipation metal device 12 to be measured, air-flow is heated by heat dissipation metal device 12 to be measured, the temperature sensor 21 of measuring the radiator portion temperature of heat dissipation metal device 12 to be measured is arranged between the metal gate graticule mesh 13 of adjacent layer, in the time that the gas flow temperature of the radiator portion of the heat dissipation metal device 12 to be measured of flowing through is constant, controller control of heat source 8 stops energy supply, and control and close temperature controlled water bath groove 20 attemperating units and pneumatic pump 19, thereby finish test.
In the present embodiment, referring to Fig. 1, be positioned at the exhausr port 15 on the chamber wall of right-hand member cavity 2, arrange near the place of separation of left end cavity 1 and right-hand member cavity 2; Right-hand member cavity 2 have one be positioned at away from openend 14 and 4 exhausr ports 15 of air intake opening, wherein air intake opening 14 diameters are 30mm, and 4 orthogonal thereto symmetry arrangement of exhausr port 15, exhausr port 15 diameters are 1/2nd of air intake opening 14 diameters; The spacing of adjacent double layer of metal grid screen 13 is 50mm, and the thickness of single-layer metal grid screen 13 is 10mm, and each layer of metal gate graticule mesh 13 is all arranged at the position apart from air intake opening 14200mm.
In the present embodiment, referring to Fig. 1 and Fig. 2, the cavity perisporium of left end cavity 1 and right-hand member cavity 2 is made up of the ceramic wool that accompanies refractory layer and lower thermal conductivity in the middle of double-layer stainless steel layer, wherein stainless steel layer thickness is 2mm, wherein the thickness of refractory layer is 50mm, is coated with the coating of high temperature resistant lower thermal conductivity in right-hand member cavity 2; On the heating end of heat dissipation metal device 12 to be measured and the binding face of copper coin 9, be coated with last layer heat-conducting silicone grease 11, the two tight heat conduction is connected; The inside diameter of left end cavity 1 and right-hand member cavity 2 is the circular cavity of 400mm, wherein the circular cavity overall length of right-hand member cavity 2 is 1000mm, left end cavity 1 below is equipped with sliding wheel 6 and can on guide rail 7, be moved left and right, right-hand member cavity 2 is stiff end, open test platform system by mobile left end cavity 1, carry out the installation of heat dissipation metal device 12 to be measured; The thickness of copper coin 9 is 10mm; The thickness of heat insulation wall 10 is 10mm.
In the present embodiment, the relatively comprehensive heat dispersion of two kinds of different heat dissipation metal devices 12 to be measured of the consistent material of configuration design of test respectively, wherein a kind of material is magnesium alloy heat radiation sheet, and another kind of material is aluminum alloy heat sink.Referring to Fig. 1 and Fig. 2, adopt the method for the detection heat dissipation metal device heat dispersion of the present embodiment proving installation, analog radiator part is worked in actual working environment, and characterize and assess the comprehensive heat dispersion of radiating element by measuring specified temp, this method synthesis has been considered complicated heat radiation process, the contribution to radiating element heat dispersion such as the physical parameter of heat radiating metal and the architectural feature of radiating element; Concrete operation step is as follows:
A. unclamp the nut cap 5 of locking left end cavity 1 and right-hand member cavity 2, left end cavity 1 is moved to the left to certain distance, be convenient to magnesium alloy heat radiation sheet to be measured to be fixed on the controlled constant temperature copper coin 9 of temperature on the heat insulation wall 10 of left end cavity 1, be specially: embed left end cavity 1 by digging with the match 5mm thick oxidized zirconium brick bat of groove of magnesium alloy heat radiation sheet periphery, the copper coin 9 of the left end cavity 1 interior constant temperature of detection system is separated by with right-hand member cavity 2, make like this heat of copper coin 9 all be delivered in right-hand member cavity 2 by magnesium alloy heat radiation sheet, while is coated with last layer heat-conducting silicone grease 11 on the binding face of the copper coin 9 of the heating surface near magnesium alloy heat radiation sheet, then magnesium alloy heat radiation sheet is embedded in the groove matching with magnesium alloy heat radiation sheet periphery on heat-resisting zirconia brick bat, magnesium alloy heat radiation sheet and copper coin 9 are fitted, ensure like this heat conduction between magnesium alloy heat radiation sheet and copper coin 9,
B. the left end cavity 1 that fixes magnesium alloy heat radiation sheet is moved right, dock with right-hand member cavity 2, and give hold-down ring 4 and O-ring seal 3 certain pressures by screwing nut cap 5, left end cavity 1 and right-hand member cavity 2 are locked in O-ring seal 3 distortion;
C. open data acquiring and recording analyser 22, each temperature sensor 21 is started working;
D. the attemperating unit of temperature controlled water bath groove 20 is opened, the temperature that temperature controlled water bath groove 20 is set is 25 DEG C, opens pneumatic pump 19, and by regulating draught damper 18 that air flow rate is adjusted to 100L/h;
E. be the resistance wire energy supply in left end cavity 1, making copper coin 9 reach constant is that the temperature of 150 DEG C heats magnesium alloy heat radiation sheet;
F. observe and record in right-hand member cavity 2 by the gas flow temperature of flowing through magnesium alloy heat radiation sheet and being heated by magnesium alloy heat radiation sheet after 13 shuntings of twice metal gate graticule mesh, in the time of this temperature constant, stop as resistance wire energy supply, until copper coin 9 temperature during lower than 40 DEG C, closed gas flow pump 19, left end cavity 1 is separated with right-hand member cavity 2, open test platform system, magnesium alloy heat radiation sheet is taken off, and change aluminum alloy heat sink, the operation identical with detecting before magnesium alloy heat radiation sheet subsequently, in the time that the gas flow temperature being heated by aluminum alloy heat sink is constant, stop as resistance wire energy supply, until copper coin 9 temperature during lower than 40 DEG C, close temperature controlled water bath groove 20 attemperating units and pneumatic pump 19, complete test.
The heat radiator of the present embodiment by two kinds of same moulding unlike materials relatively identical be heated with cooling condition under, when being heated, heat radiator reaches while stablizing with the state of cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion quality of these two kinds of heat radiator, being that heated airflow temperature is higher illustrates that the comprehensive heat dispersion of heat radiator is better, thereby can judge fast both, which is better and which is worse, avoided the consideration of the many factors such as the specific heat capacity, coefficient of heat conductivity, surface film thermal conductance of heat radiator material.The method that the present embodiment detects heat dissipation metal device heat dispersion is that detected radiating element is placed in a cavity, the controlled steady thermal source of heat dissipation metal device heating end and a temperature is fitted radiating element temperature is raise, the adjustable air-flow cooling heat dissipation device of given radiating element radiator portion one temperature flow-controllable again, the gas flow temperature that recorded stream heats through radiating element and by radiating element simultaneously, when being heated, radiating element reaches while stablizing with cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion quality of radiating element when stablizing, under the constant thermal source of uniform temp and equal cooling condition, the comprehensive heat dispersion of the higher radiating element of temperature is better when heated airflow temperature stabilization, realize thus the comprehensive heat dispersion that characterizes and assess radiating element, this method synthesis has been considered complicated heat radiation process, the contribution to radiating element heat dispersion such as the physical parameter of heat radiating metal and the architectural feature of radiating element.
implement two:
The present embodiment and embodiment mono-are basic identical, and special feature is:
The method that the present embodiment detects heat dissipation metal device heat dispersion can help design department to optimize the design of heat radiator.The present embodiment heat dissipation metal device 12 to be measured relates to two alloy materials of the same race of comparison, surface area is consistent, moulding is different moulding one alloy heat radiator and moulding two alloy heat radiator, and specific operation process is as follows:
A. unclamp the nut cap 5 of locking left end cavity 1 and right-hand member cavity 2, left end cavity 1 is moved to the left to certain distance, be convenient to moulding one alloy heat radiator to be fixed on the controlled constant temperature copper coin 9 of temperature on the heat insulation wall 10 of left end cavity 1, be specially: embed left end cavity 1 by digging with the match 8mm thick oxidized zirconium brick bat of groove of moulding one alloy heat radiator periphery, the copper coin 9 of the left end cavity 1 interior constant temperature of detection system is separated by with right-hand member cavity 2, make like this heat of copper coin 9 all be delivered in right-hand member cavity 2 by moulding one alloy heat radiator, while is coated with last layer heat-conducting silicone grease 11 on the binding face of the copper coin 9 of the heating surface near moulding one alloy heat radiator, then moulding one alloy heat radiator is embedded in the groove matching with moulding one alloy heat radiator periphery on heat-resisting zirconia brick bat, moulding one alloy heat radiator and copper coin 9 are fitted, ensure like this heat conduction between moulding one alloy heat radiator and copper coin 9,
B. the left end cavity 1 that fixes moulding one alloy heat radiator is moved right, dock with right-hand member cavity 2, and give hold-down ring 4 and O-ring seal 3 certain pressures by screwing nut cap 5, left end cavity 1 and right-hand member cavity 2 are locked in O-ring seal 3 distortion;
C. open data acquiring and recording analyser 22, each temperature sensor 21 is started working;
D. the attemperating unit of temperature controlled water bath groove 20 is opened, the temperature that temperature controlled water bath groove 20 is set is 15 DEG C, opens pneumatic pump 19, and by regulating draught damper 18 that air flow rate is adjusted to 80L/h;
E. be the resistance wire energy supply in left end cavity 1, making copper coin 9 reach constant is that the temperature of 100 DEG C heats moulding one alloy heat radiator;
F. observe and record in right-hand member cavity 2 by the gas flow temperature of flowing through moulding one alloy heat radiator and being heated by moulding one alloy heat radiator after 13 shuntings of twice metal gate graticule mesh, in the time of this temperature constant, stop as resistance wire energy supply, until copper coin 9 temperature during lower than 40 DEG C, closed gas flow pump 19, left end cavity 1 is separated with right-hand member cavity 2, open test platform system, moulding one alloy heat radiator is taken off, and change moulding two alloy heat radiator, the operation identical with detecting before moulding one alloy heat radiator subsequently, in the time that the gas flow temperature of moulding two alloy heat radiator heating is constant, stop as resistance wire energy supply, until copper coin 9 temperature during lower than 40 DEG C, close temperature controlled water bath groove 20 attemperating units and pneumatic pump 19, complete test.
The present embodiment by relatively moulding one and moulding two alloy heat radiator identical be heated with cooling condition under, when being heated, heat radiator reaches while stablizing with the state of cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion quality of these two kinds of different shaping heat radiator, being that heated airflow temperature is higher illustrates that the comprehensive heat dispersion of heat radiator is better, thereby can judge fast both, which is better and which is worse, thereby draw optimized design fast.
By reference to the accompanying drawings the embodiment of the present invention is illustrated above; but the invention is not restricted to above-described embodiment; can also make multiple variation according to the object of innovation and creation of the present invention; the change made under all Spirit Essences according to technical solution of the present invention and principle, modification, substitute, combination, simplify; all should be equivalent substitute mode; as long as goal of the invention according to the invention; only otherwise deviate from the present invention and detect the method for heat dissipation metal device heat dispersion and know-why and the inventive concept of proving installation thereof, all belong to protection scope of the present invention.
Claims (17)
1. one kind is detected the method for heat dissipation metal device heat dispersion, it is characterized in that: heat dissipation metal device to be measured is placed in the cavity of sealing, the controlled steady thermal source of the heating end of heat dissipation metal device to be measured and temperature is fitted, the temperature of heat dissipation metal device to be measured is raise, again the air-flow cooling heat dissipation device that the radiator portion of heat dissipation metal device to be measured is controlled with temperature and flow is adjustable is connected, the heat that the radiator portion of heat dissipation metal device to be measured is distributed is collected by air-flow cooling heat dissipation device completely, recorded stream is through heat dissipation metal device to be measured and by the gas flow temperature of heat dissipation metal device heating to be measured simultaneously, when being heated of heat dissipation metal device to be measured reaches while stablizing with cooling, the height of heated airflow temperature characterizes the comprehensive heat dispersion of heat dissipation metal device to be measured when stablizing.
2. detect according to claim 1 the method for heat dissipation metal device heat dispersion, it is characterized in that: recorded stream is during through heat dissipation metal device to be measured and by the gas flow temperature of heat dissipation metal device to be measured heating, adopt and be arranged at respectively the temperature data that near flow area arranges respectively the heating end of heat dissipation metal device to be measured and colling end temperature acquisition point is obtained.
3. according to the method that detects heat dissipation metal device heat dispersion described in claim 1 or 2, it is characterized in that: the temperature that the controlled steady thermal source of described temperature produces is adjustable within the scope of 30 ~ 500 DEG C.
4. according to the method that detects heat dissipation metal device heat dispersion described in claim 1 or 2, it is characterized in that: in the cavity of sealing, near area of space described heat dissipation metal device radiator portion to be measured, described air-flow cooling radiator make the to flow through gas flow temperature of heat dissipation metal device radiator portion to be measured is adjustable within the scope of 10 ~ 50 DEG C, and makes air flow rate adjustable within the scope of 50 ~ 150L/h.
5. according to the method that detects heat dissipation metal device heat dispersion described in claim 1 or 2, it is characterized in that: heat dissipation metal device to be measured is heat radiator or the metal bar for the manufacture of radiating element.
6. one kind implements the claims the proving installation that detects the method for heat dissipation metal device heat dispersion described in 1, comprise device cavity and the temperature analysis detection system of sealing, described device cavity is divided into by heat insulation wall (10) separate space that two parts heat intercepts, form left end cavity (1) and right-hand member cavity (2), heat dissipation metal device to be measured (12) is placed in described device cavity, and the heating end of heat dissipation metal device to be measured (12) and radiator portion are laid respectively in described left end cavity (1) and described right-hand member cavity (2), described temperature analysis detection system is by thermal source (8), temperature sensor (21) and data acquiring and recording analyser (22) form, described thermal source (8) is positioned at the cavity space at the heating end place of heat dissipation metal device to be measured (12), the heating end of heat dissipation metal device to be measured (12) and described thermal source (8) fit, the temperature of heat dissipation metal device to be measured (12) is raise, described temperature sensor (21) at least comprises two, temperature sensor described in one of them (21) is arranged in described left end cavity (1), wherein described in another, temperature sensor (21) is arranged in described right-hand member cavity (2), measure respectively the heating end of heat dissipation metal device to be measured (12) and the temperature of radiator portion, it is characterized in that: in described left end cavity (1), described thermal source (8) adopts a series of resistance wires, the heat that described resistance wire generates is by transmitting to copper coin (9) radiation, carry out heat conduction by described copper coin (9) to the heating end of heat dissipation metal device to be measured (12) again, heat insulation wall (10) between described left end cavity (1) and described right-hand member cavity (2) is made up of zirconia brick bat or stupalith, on described heat insulation wall (10), dig the embedded groove matching with heat dissipation metal device (12) peripheral shape to be measured and size, by the described heat insulation wall of the closely knit embedding of heat dissipation metal device to be measured (12) (10), described temperature analysis detection system also comprises air-flow cooling radiator, the radiator portion of heat dissipation metal device to be measured (12) is connected with described air-flow cooling radiator, the heat that the radiator portion of heat dissipation metal device to be measured (12) is distributed is collected by air-flow cooling heat dissipation device completely, described air-flow cooling radiator comprises air flow rate control device and air-flow temperature control equipment, the major control of described air flow rate control device flows into the flow of the air-flow in described right-hand member cavity (2) from outside, the control of described gas flow temperature control device flows into the temperature of the air-flow in described right-hand member cavity (2) from outside, described temperature analysis detection system also comprises controller, the temperature that described in described controller control, thermal source (8) produces is adjustable, described controller is also controlled respectively described air flow rate control device and described gas flow temperature control device simultaneously, the gas flow temperature of radiator portion of heat dissipation metal device to be measured (12) of making to flow through is adjustable, and make air flow rate adjustable.
7. proving installation according to claim 6, it is characterized in that: described device cavity forms assembled moving cavity by described left end cavity (1) and described right-hand member cavity (2) Moveable assembled, described left end cavity (1) is with the closed fixed cavity of described heat insulation wall (10), the sliding wheel (6) that be equipped with described left end cavity (1) below can move on guide rail (7), described right-hand member cavity (2) is open type fixed cavity, be specially: in the time testing, open described right-hand member cavity (2) by mobile described left end cavity (1), carry out the installation of heat dissipation metal device to be measured (12), embed after described heat insulation wall (10) at heat dissipation metal device to be measured (12), the left end cavity (1) that fixes heat dissipation metal device to be measured (12) is moved right and docked with described right-hand member cavity (2), and give hold-down ring (4) and O-ring seal (3) set pressure by screwing nut cap (5), make described O-ring seal (3) by distortion, by the edge of opening locking of the described heat insulation wall of described left end cavity (1) (10) one sides and described right-hand member cavity (2), described left end cavity (1) and described right-hand member cavity (2) are combined, in the time completing test, by unscrewing described nut cap (5), hold-down ring (4) and O-ring seal (3) are carried out to release, open described right-hand member cavity (2) by mobile described left end cavity (1), carry out dismounting and the replacing of heat dissipation metal device to be measured (12).
8. according to proving installation described in claim 6 or 7, it is characterized in that: at described right-hand member cavity (2), described air flow rate control device is successively by airflow line (16), draught damper (18) and pneumatic pump (19) are formed by connecting, the gas outlet of described airflow line (16) is connected with the air intake opening (14) on described right-hand member cavity (2), on described right-hand member cavity (2), be also provided with exhausr port (15), also be provided with vortex shedding flow meter (17) near on described airflow line (16) pipeline of described right-hand member cavity (2), the signal output part of described vortex shedding flow meter (17) is connected with described controller, described controller is controlled the air flow rate of the radiator portion of the heat dissipation metal device to be measured (12) of flowing through by controlling described draught damper (18) and pneumatic pump (19), described gas flow temperature control device adopts temperature controlled water bath groove (20), gas is entering pneumatic pump (19) before, by described temperature controlled water bath groove (20), gas is carried out to temperature adjusting in advance.
9. proving installation according to claim 8, it is characterized in that: in described right-hand member cavity (2), be also provided with at least double layer of metal grid screen (13), in the time testing, air-flow in described airflow line (16) is inputted described right-hand member cavity (2) is shunted by whole described metal gate graticule mesh (13), the flow through radiator portion of heat dissipation metal device to be measured (12), air-flow is heated by heat dissipation metal device to be measured (12), the described temperature sensor (21) of measuring the radiator portion temperature of heat dissipation metal device to be measured (12) is arranged between the described metal gate graticule mesh (13) of adjacent layer, in the time that the gas flow temperature of the radiator portion of the heat dissipation metal device to be measured (12) of flowing through is constant, described in described controller control, thermal source (8) stops energy supply, and control and close described temperature controlled water bath groove (20) attemperating unit and described pneumatic pump (19), thereby finish test.
10. proving installation according to claim 8, is characterized in that: be positioned at the described exhausr port (15) on the chamber wall of described right-hand member cavity (2), near the place's of separation setting of described left end cavity (1) and described right-hand member cavity (2).
11. proving installations according to claim 8, it is characterized in that: described right-hand member cavity (2) have one be positioned at away from openend described air intake opening (14) and 4 described exhausr ports (15), wherein said air intake opening (14) diameter is 30 ~ 100mm, and the orthogonal thereto symmetry arrangement of 4 described exhausr ports (15), described exhausr port (15) diameter is 1/2nd of described air intake opening (14) diameter.
12. proving installations according to claim 8, it is characterized in that: the spacing of adjacent two-layer described metal gate graticule mesh (13) is 50 ~ 100mm, described in individual layer, the thickness of metal gate graticule mesh (13) is 10 ~ 50mm, and each layer of described metal gate graticule mesh (13) is all arranged at the position of described air intake opening (14) 100 ~ 200mm of distance.
13. according to proving installation described in claim 6 or 7, it is characterized in that: the cavity perisporium of described left end cavity (1) and described right-hand member cavity (2) is made up of the ceramic wool or the magnesia brick that accompany refractory layer and lower thermal conductivity in the middle of double-layer stainless steel layer, wherein stainless steel layer thickness is 0.5 ~ 2mm, wherein the thickness of refractory layer is 30 ~ 50mm, is coated with the coating of high temperature resistant lower thermal conductivity in described right-hand member cavity (2).
14. according to proving installation described in claim 6 or 7, it is characterized in that: on the heating end of heat dissipation metal device to be measured (12) and the binding face of described copper coin (9), be coated with last layer heat-conducting silicone grease (11), the two tight heat conduction is connected.
15. according to proving installation described in claim 6 or 7, it is characterized in that: the circular cavity that the inside diameter of described left end cavity (1) and described right-hand member cavity (2) is 250 ~ 400mm, the circular cavity overall length of wherein said right-hand member cavity (2) is 750 ~ 1000mm.
16. according to proving installation described in claim 6 or 7, it is characterized in that: the thickness of described copper coin (9) is 5 ~ 10mm.
17. according to proving installation described in claim 6 or 7, it is characterized in that: the thickness of described heat insulation wall (10) is 5 ~ 10mm.
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| CN112649184A (en) * | 2020-12-22 | 2021-04-13 | 青岛海尔空调电子有限公司 | Method and device for testing heat dissipation capacity of radiator and test box |
| CN113432898A (en) * | 2021-05-13 | 2021-09-24 | 天津电气科学研究院有限公司 | Multipoint crimping type temperature measurement copper block of radiator, performance testing device and testing method |
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