CN103728338A - Device and method for electromagnetically testing heat conduction coefficient - Google Patents
Device and method for electromagnetically testing heat conduction coefficient Download PDFInfo
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- CN103728338A CN103728338A CN201310347686.7A CN201310347686A CN103728338A CN 103728338 A CN103728338 A CN 103728338A CN 201310347686 A CN201310347686 A CN 201310347686A CN 103728338 A CN103728338 A CN 103728338A
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Abstract
The invention provides a device and a method for electromagnetically testing a heat conduction coefficient. The device is characterized in that an electromagnetic heating disk is arranged in the middle of the device and used for conducting a heating process, and four infrared temperature detection holes are formed in the periphery of the device and used for detecting the temperature. The device comprises a glass protection plate, a heat-insulated material layer, the electromagnetic heating disk, the infrared temperature detection holes and a digital display. According to the device, the temperature change of the periphery of a heating region is measured to reflect the heat conduction coefficient of a vacuum heat-insulated plate; the temperature can be quickly increased in the short time by an electromagnetic heating principle; obtained data is close to the average level due to the plurality of temperature detection holes; the device is simple in operation steps, shorter in detection time, easy to master, smaller in volume and convenient to carry.
Description
Technical field
The present invention relates to a kind of heat conductivity measuring device, particularly a kind of device that utilizes Electromagnetic Heating principle to measure heat conductivity of vacuum insulation panel.
Background technology
Vacuum heat-insulating plate is a kind of novel, efficient heat-insulating material, is also the best insulation material of current heat-insulating property.It is based on vacuum insulation principle, by improving to greatest extent in plate vacuum tightness filling, with sandwich layer thermal insulation material, realizes thermal insulation, thereby reaches insulation, the object such as energy-conservation.Along with the pay attention to day by day of all trades and professions to energy-saving and emission-reduction, low-carbon economy and the development of science and technology, vacuum heat-insulating plate all has vast potential for future development in fields such as refrigerator, freezer, Medical heat-preserving box, food industry, communications and transportation and Aero-Space.
Coefficient of heat conductivity is thermal conduction characteristic for weighing thermal insulation material and insulation material and the important parameter of heat-insulating property, it is the important component part in material thermal physical property parameter, the size that has characterized the material capacity of heat transmission, has very important application at industrial circle, electronic applications, building field and aerospace field etc.In order to reduce better energy consumption, energy-saving and emission-reduction, and optimizing product design, enhance product performance, the thermal physical property parameter data of material have very high directive significance, therefore the research of material thermal conductivity assay method are had to very important realistic meaning.Particularly, for vacuum heat-insulating plate, the size of coefficient of heat conductivity is its most important physical parameter.
Publication number is the device that discloses a kind of heat conducting coefficient measuring in the patent of invention of CN1657923A, and it comprises a sealing adiabatic apparatus and a pumped vacuum systems.Wherein in adiabatic apparatus, there are thermal source, two derbies, testing sample, a cooling device etc.This adiabatic apparatus is to be dispersed in aluminium oxide ceramics matrix material by carbon nano-tube ordered arrangement, through plasma sintering, forms, and the content of carbon nano-tube is 5-10%.This carbon nano-tube is perpendicular to the direction of heat transmission and arranges.The present invention utilizes pumped vacuum systems that internal gas is discharged, and can get rid of the harmful effect of gas; Because of the radially athermanous characteristic of carbon nano-tube, the reflect heat that is passed to carbon nano-tube is gone back again, improve the heat-insulating property of measurement mechanism, make energy to predetermined direction transmission, can improve final measuring accuracy.
Publication number is to disclose a kind of heat conductivity measuring device and method in the patent of invention of CN101776628A.This device comprises: thermal probe, is inserted into the testing sample for thermal conductivity measurement; Thermopair, for measuring the wall surface temperature of thermal probe; Collector, for gathering wall surface temperature and the corresponding minute of thermocouple measurement; And data processor, for the Heat Conduction Differential Equations in conjunction with representing wall temperature rise and wall surface temperature and corresponding minute inversion procedure, obtain the coefficient of heat conductivity of testing sample.The present invention has taken into full account the thermal contact resistance between probe thermal capacitance and probe and testing sample etc., and the isoparametric measuring accuracy of coefficient of heat conductivity is improved greatly.
Although the precision of above-mentioned publication heat conducting coefficient measuring is very high, principle and the complicated structure of device, and also Measuring Time is longer, is unfavorable for a large amount of production and use.Therefore, be necessary to invent a kind of device that can measure rapidly and accurately heat conductivity of vacuum insulation panel.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, and a kind of device that utilizes the principle of Electromagnetic Heating to measure heat conductivity of vacuum insulation panel is provided.
For the technical scheme that realizes object employing of the present invention is: provide a kind of electromagnetism to survey the device of coefficient of heat conductivity, it is characterized in that monnolithic case is cylindrical, built-in electromagnetic heating plate is for heating, surrounding is uniformly distributed 2～6 infrared measurement of temperature holes for detection of temperature, and this device comprises: glass protecting plate 10, insulation material layer 20, electromagnetic heating plate 30, infrared measurement of temperature hole 40, digital display 50.By measuring heating zone temperature variation around, reflect the size of heat conductivity of vacuum insulation panel.
This device monnolithic case is cylindrical, and diameter is 100～400mm, and height is 30～100mm.
Described device, is characterized in that electromagnetic heating plate is positioned at the centre of this device, is shaped as cylindrically, and diameter is 40～150mm.
Described device, is characterized in that insulation material layer surrounds electromagnetic heating plate, is shaped as hollow cylinder, and internal diameter is 50～200mm, and external diameter is 70～220mm.
Described device, is characterized in that infrared measurement of temperature hole number is 2～6, is evenly distributed on this device surrounding, and apart from center 40～150mm, diameter is 10～40mm.
Described device, is characterized in that there is a thermometer in this device top and each infrared measurement of temperature hole, is respectively used to the temperature on the gentle vacuum heat-insulating plate of measuring chamber surface.
Described device, is characterized in that glass protecting plate covers the most surfaces of this device.
Described device, is characterized in that digital display is positioned at device side, shows the temperature difference recording.
Described device, is characterized in that power is 10～1000W.
The invention also discloses a kind of method of using said apparatus, concrete technology step is as follows:
(1) by smooth this device a certain position that is placed on vacuum heat-insulating plate to be measured;
(2) starter gear after energising, electromagnetic heating plate starts heating;
(3), after a period of time, record the temperature on vacuum heat-insulating plate surface in each infrared measurement of temperature hole;
(4) get the difference of each temperature value recording and room temperature and ask its mean value, being presented on digital display;
(5) this device is placed on other several positions, repeats above-mentioned steps, finally get the mean value of all measured values and amount to into thermal conductivity value.
Effect: the present invention compared with prior art, has the following advantages:
(1) utilize Electromagnetic Heating principle, temperature at short notice can raise rapidly;
(2) this device comprises multiple thermometer holes, and the data obtained is close to average level;
(3) this device operation steps is simple, and detection time is shorter, easily grasps;
(4) this device volume is less, conveniently carries.
Accompanying drawing explanation
Fig. 1 is the vertical view that a kind of electromagnetism of the present invention is surveyed the device of coefficient of heat conductivity;
Fig. 2 is the front view that a kind of electromagnetism of the present invention is surveyed the device of coefficient of heat conductivity.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims to the modification of the various equivalent form of values of the present invention and limit.
Embodiment
With reference to Fig. 1, Fig. 2, a kind of electromagnetism described in the present embodiment is surveyed the device of coefficient of heat conductivity, comprising: the probe 50 of glass protecting plate 10, insulation material layer 20, electromagnetic heating plate 30, infrared measurement of temperature hole 40, heat conducting coefficient measuring, digital display 60.Integral diameter is 200mm, and height is 50mm; Electromagnetic heating plate diameter is 80mm; Insulation material layer internal diameter is 90mm, and external diameter is 100mm; Infrared measurement of temperature hole number is 4, is evenly distributed on this device surrounding, and apart from center 100mm, diameter is 20mm; This rating of set size is 200W.
When use changes measurement device heat conductivity of vacuum insulation panel, concrete technology step is as follows:
(1) by smooth this device centre position that is placed on vacuum heat-insulating plate to be measured;
(2) starter gear after energising, electromagnetic heating plate starts heating;
(3), after a period of time, record the temperature on vacuum heat-insulating plate surface in each infrared measurement of temperature hole;
(4) get the difference of each temperature value recording and room temperature and ask its mean value, being presented on digital display;
(5) this device is placed on vacuum heat-insulating plate diagonal line near on the position at four angles, repeats above-mentioned steps, finally get the mean value of all measured values and amount to into thermal conductivity value.
The above embodiment, it is only preferred embodiment of the present invention, be not the restriction of the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.In every case be the content that does not depart from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. electromagnetism is surveyed a device for coefficient of heat conductivity, it is characterized in that this device comprises: glass protecting plate, insulation material layer, electromagnetic heating plate, infrared measurement of temperature hole, digital display.
2. device according to claim 1, is characterized in that this device global shape is cylindrical, and diameter is 100～400mm, and height is 30～100mm.
3. device according to claim 1, is characterized in that electromagnetic heating plate is positioned at the centre of this device, is shaped as cylindrically, and diameter is 40～150mm.
4. device according to claim 1, is characterized in that insulation material layer surrounds electromagnetic heating plate, is shaped as hollow cylinder, and internal diameter is 50～200mm, and external diameter is 70～220mm.
5. device according to claim 1, is characterized in that infrared measurement of temperature hole number is 2～6, is evenly distributed on this device surrounding, and apart from center 40～150mm, diameter is 10～40mm.
6. device according to claim 1, is characterized in that there is a thermometer in this device top and each infrared measurement of temperature hole, is respectively used to the temperature on the gentle vacuum heat-insulating plate of measuring chamber surface.
7. device according to claim 1, is characterized in that glass protecting plate covers the most surfaces of this device.
8. device according to claim 1, is characterized in that digital display is positioned at device side, shows the coefficient of heat conductivity recording.
9. device according to claim 1, is characterized in that power is 10～1000W.
10. use said apparatus to survey a method for coefficient of heat conductivity, concrete technology step is as follows:
(1) by smooth this device a certain position that is placed on vacuum heat-insulating plate to be measured;
(2) starter gear after energising, electromagnetic heating plate starts heating;
(3), after a period of time, record the temperature on vacuum heat-insulating plate surface in each infrared measurement of temperature hole;
(4) get the difference of each temperature value recording and room temperature and ask its mean value, being presented on digital display;
(5) this device is placed on other several positions, repeats above-mentioned steps, finally get the mean value of all measured values and amount to into thermal conductivity value.
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| CN201310347686.7A CN103728338A (en) | 2013-08-12 | 2013-08-12 | Device and method for electromagnetically testing heat conduction coefficient |
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| CN201310347686.7A CN103728338A (en) | 2013-08-12 | 2013-08-12 | Device and method for electromagnetically testing heat conduction coefficient |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181192A (en) * | 2014-08-18 | 2014-12-03 | 太仓派欧技术咨询服务有限公司 | Device for judging heat-insulating property of vacuum insulation panel through eddy-current method |
| CN107727692A (en) * | 2017-09-06 | 2018-02-23 | 珠海彩珠实业有限公司 | A kind of device and its detection method for detecting vacuum glass vacuum |
| CN109001254A (en) * | 2018-08-27 | 2018-12-14 | 中南大学 | A kind of device and method of quick test metallurgical cinder Thermal Conductivity at High Temperature |
| CN111781226A (en) * | 2020-07-03 | 2020-10-16 | 华润水泥技术研发有限公司 | Artificial stone plate heat resistance testing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181192A (en) * | 2014-08-18 | 2014-12-03 | 太仓派欧技术咨询服务有限公司 | Device for judging heat-insulating property of vacuum insulation panel through eddy-current method |
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| CN109001254A (en) * | 2018-08-27 | 2018-12-14 | 中南大学 | A kind of device and method of quick test metallurgical cinder Thermal Conductivity at High Temperature |
| CN109001254B (en) * | 2018-08-27 | 2020-09-29 | 中南大学 | Device and method for rapidly testing high-temperature heat conductivity coefficient of metallurgical slag |
| CN111781226A (en) * | 2020-07-03 | 2020-10-16 | 华润水泥技术研发有限公司 | Artificial stone plate heat resistance testing method |
| CN111781226B (en) * | 2020-07-03 | 2023-12-19 | 华润水泥技术研发有限公司 | Method for testing heat resistance of artificial stone plate |
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Application publication date: 20140416 |