CN104122032A - Measuring method for quickly judging VIP vacuum degree - Google Patents
Measuring method for quickly judging VIP vacuum degree Download PDFInfo
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- CN104122032A CN104122032A CN201410404589.1A CN201410404589A CN104122032A CN 104122032 A CN104122032 A CN 104122032A CN 201410404589 A CN201410404589 A CN 201410404589A CN 104122032 A CN104122032 A CN 104122032A
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Abstract
The invention discloses a measuring method for quickly judging a VIP vacuum degree. The measuring method for quickly judging the VIP vacuum degree includes that heating a vacuum thermal-insulation board with a piece of aluminum foil at the outermost layer through vortex technology, cooling quickly after testing, and comparing the lowered temperature value delta T at the 5-10 centimeters circumference radius with a standard temperature value delta T <standard> of the vacuum thermal-insulation board to judge whether the vacuum degree of the VIP is qualified. The vacuum degree of a VIP plate is measured through measuring a transverse thermal conductivity amount, and the transverse thermal conductivity amount can be represented by delta T; a vortex source, a main probe, an auxiliary infrared temperature measuring probe, a temperature control element and the like are combined to measure the temperature of a standard plate to obtain the delta T <standard>. The measuring method is capable of precisely and quickly judging whether the VIP vacuum degree is qualified, the operation is easy to finish, the cost is low, and the quality detection requirement of the mass production of the VIP is satisfied.
Description
Technical field
The present invention relates to a kind of measuring method of quick judgement vacuum tightness, particularly relate to a kind of measuring method of quick judgement VIP vacuum tightness.
Background technology
Vacuum heat-insulating plate (VIP) is the novel ultra high efficiency heat-insulating plate of one occurring in recent years, and it is mainly made up of core, Obstruct membrane and getter three parts.VIP makes based on vacuum insulation principle, by filling core and at utmost improve vacuum tightness in plate and realize heat conducting obstruct, thereby makes sheet material reach insulation, energy-conservation object.VIP have low-down coefficient of heat conductivity (being conventionally less than 0.003w/m.k), thickness very little (only for conventional insulation material 1/7), environmental protection (produce and application process in, do not use the material of welding, as ODS) etc. feature, be applicable to energy-conservation product of having relatively high expectations, have larger Technological Economy meaning.The enterprise of current domestic research and development vacuum heat-insulating plate is very few, and quality and external also have gap, but due to made in China low cost and the large factor of low-carbon economy two, makes it still have very large market.
The vacuum tightness of vacuum heat-insulating plate is higher, and the heat-proof quality of sheet material is just better, and its coefficient of heat conductivity is lower.Ensure the performance completely of vacuum heat-insulating plate heat-proof quality, its internal pressure at least should ensure below 100Pa.Aging, deposit or use procedure in, once vacuum tightness decay or loss, the performance of the vacuum heat-insulating plate even complete failure that will greatly be affected so, thereby vacuum heat-insulating plate consistency of performance and stability is in-service particular importance.
Judge now the method for VIP vacuum tightness, although measuring accuracy is higher, because VIP coefficient of heat conductivity is little, cause plate of its average test to want 45 minutes consuming time, and VIP sheet material also can increase while thickening its detection time greatly, have a strong impact on the production efficiency of VIP.Chinese patent CN203100971U (open day is on July 31st, 2013) discloses a kind of vacuum detecting method of built-in vacuum heat-insulating plate.VIP is put into the annular seal space of this device, again the sensing point of vacuum pressure sensor is set on plate surface thin layer, then make upper and lower annular seal space vacuumize simultaneously, and detect sensing point displacement with laser displacement detector, measure the pressure change numerical value in annular seal space with vacuum pressure sensor, these two kinds of numerical value are all inputted in X-Y function recording instrument and analyzed.In registering instrument, can find that curve is undergone mutation somewhere, the corresponding vacuum tightness value of catastrophe point just can be thought the vacuum tightness value of this test sheet material.The researcher of Shanghai Maritime University mentions its measurement mechanism and is divided into inside and outside two Room in the document " the hot Protection Code in two chambers is measured the research of heat conductivity of vacuum insulation panel " of delivering for 2011; respectively as test heating arrangement; and thermel protection device; this device is measured the coefficient of heat conductivity of VIP based on stable state, VIP size is not restricted.The detection method of these two kinds of VIP vacuum tightnesss, the vacuum tightness of detection VIP that can be real-time, guarantees the quality of product; Can realize the performance parameter of quantitative VIP accurately, as temperature conductivity, vacuum tightness etc.; Simple in structure, easily operate, can detect the vacuum heat-insulating plate on any surface.But also exist time-consuming long problem and defect, produce for enterprise practical, do not need very definite parameter, only need to judge that it whether has qualifiedly just met actual production requirement, thereby its tediously long Measuring Time will have a strong impact on the production efficiency of enterprise.
According to current foreign and domestic situation and the background of the market demand now, work out a kind of method that can judge fast VIP vacuum tightness, vacuum heat-insulating plate is carried out to qualitative evaluation.The method is to adopt eddy-current technique to carry out Fast Heating to vacuum heat-insulating plate, utilizes temp-controlling element, infrared temperature probe etc., can realize the performance of VIP is judged fast.This detection method has that detection speed is fast, simple to operate, low cost and other advantages, has met the quality testing demand that VIP is produced in enormous quantities.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, and a kind of measuring method of quick judgement VIP vacuum tightness is provided.The size that the method adopts eddy-current method to measure horizontal heat conduction amount is measured the vacuum tightness size of VIP sheet material, because when VIP gas leakage, vacuum tightness reduces, its longitudinal conduction values increases, and laterally heat conduction amount reduces with regard to corresponding.Concrete measuring method has: main probe and auxiliary probe are arranged on certain position by (1), and instrument is placed on the VIP that coefficient of heat conductivity is standard value, starts power supply.(2) aluminium foil fast speed heat production, with 2～6 infrared temperature-measuring guns, center and 5～10cm radius of a circle place under instrument carry out thermometric, and temperature approach is △ T
mark.(3) main probe and auxiliary probe are arranged on to identical position, instrument are placed on the VIP sample that will test, start power supply.(4) aluminium foil fast speed heat production, with infrared temperature-measuring gun, center and identical radius of a circle place under instrument carry out thermometric, and temperature approach is △ T.(5) compare △ T
markwith △ T, if differ within the limits prescribed, represent that the vacuum tightness of sample VIP is qualified.
For the technical scheme that realizes object employing of the present invention is: the measuring method that a kind of quick judgement VIP vacuum tightness is provided, the vacuum heat-insulating plate that to it is characterized in that outermost layer be aluminium foil adopts eddy-current technique to carry out Fast Heating, fast cooling after test, the temperature value △ T reducing at radius of a circle place and the vacuum heat-insulating plate △ T of standard
markcompare to judge that whether qualified this VIP vacuum tightness is.It is characterized in that adopting the temperature value at 5～10cm place, 2～6 infrared temperature probe measuring distance eddy current sources; Adopt the size of the horizontal heat conduction amount of mensuration to measure the vacuum tightness of VIP sheet material; And utilize eddy current source, main probe to combine standard plate is carried out to temperature survey with auxiliary infrared temperature probe, temperature control element etc., obtain △ T
mark.
The present invention compared with prior art, have the following advantages: (1) aluminium foil has larger thermal conductivity 198W/ (m.K), adopt the method for eddy heating for heating can make its induction heat production fast, can fast cooling after experiment, because aluminium foil is thinner, heating power is less, makes the thermal value of coil very little, so instrument can carry out detection next time very soon, has improved testing efficiency; (2) eddy-current method does not need to consider radiation dispersed heat, only needs to consider the hot thermal loss causing, and makes test job more convenient and quicker; (3) laterally the temperature of heat conduction amount available range thermal source 5～10cm radius homonymy aluminium foil and the temperature difference △ T at thermal source place are next of equal value, make evaluation work more simple, have improved testing efficiency; (4) utilize main probe and auxiliary probe to combine to measure temperature difference △ T, then with △ T
markcompare, make data more accurate, more can judge fast that whether the vacuum tightness of VIP is qualified.
Brief description of the drawings
The measuring method schematic diagram of Fig. 1 quick judgement VIP vacuum tightness of the present invention.
Diagram 10 is VIP sheet material; 20 for being directly dissipated in airborne Q
1; 30 is horizontal heat conduction amount Q
2; 40 is longitudinal heat conduction amount Q
3; 50 is eddy current source; 60 is main probe and auxiliary infrared temperature probe instrument and temp-controlling element.
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 amendment of the various equivalent form of values of the present invention and limit.
Embodiment
As shown in Figure 1, a kind of measuring method of quick judgement VIP vacuum tightness, the vacuum heat-insulating plate that to it is characterized in that outermost layer be aluminium foil adopts eddy-current technique to carry out Fast Heating, fast cooling after test, the temperature value reducing at 5～10cm radius of a circle place compares to judge that with the vacuum heat-insulating plate of standard whether qualified this VIP vacuum tightness is.It is characterized in that 10, VIP sheet material; 20, be directly dissipated in airborne Q
1; 30, horizontal heat conduction amount Q
2; 40, longitudinal heat conduction amount Q
3; 50, eddy current source; 60, main probe and auxiliary infrared temperature probe instrument and temp-controlling element etc.;
The vacuum heat-insulating plate that to it is characterized in that outermost layer be aluminium foil adopts eddy-current technique to carry out Fast Heating, fast cooling after test, the temperature value △ T reducing at radius of a circle place and the vacuum heat-insulating plate △ T of standard
markcompare to judge that whether qualified this VIP vacuum tightness is.It is characterized in that adopting the temperature value at 5～10cm place, 2～6 infrared temperature probe measuring distance eddy current sources; Adopt the size of the horizontal heat conduction amount of mensuration to measure the vacuum tightness of VIP sheet material; And utilize eddy current source, main probe to combine standard plate is carried out to temperature survey with auxiliary infrared temperature probe, temperature control element etc., obtain △ T
mark.
First main probe and auxiliary probe are arranged on to the position, radius of a circle place apart from eddy current source 8cm, instrument is placed on the VIP that coefficient of heat conductivity is standard value, start power supply.The heat production of aluminium foil fast speed, then with carrying out thermometric in 4 infrared temperature-measuring guns center and the radius of a circle place apart from eddy current source 8cm under instrument, temperature approach is △ T
mark; Measure △ T with identical method; Both are compared and can judge that whether VIP vacuum tightness is qualified.
Above are only single embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading the scope of protection of the invention.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 (4)
1. judge fast the measuring method of VIP vacuum tightness for one kind, the vacuum heat-insulating plate that to it is characterized in that outermost layer be aluminium foil adopts eddy-current technique to carry out Fast Heating, control ambient temperature well, fast cooling after test, the temperature value △ T reducing at radius of a circle place and the vacuum heat-insulating plate △ T of standard
markcompare and judge that fast whether qualified this VIP vacuum tightness is.
2. according to measuring method claimed in claim 1, it is characterized in that adopting the temperature value at 5～10cm place, 2～6 infrared temperature probe measuring distance eddy current sources.
3. according to measuring method claimed in claim 1, it is characterized in that adopting the size of the horizontal heat conduction amount of mensuration to measure the vacuum tightness of VIP sheet material.
4. according to measuring method claimed in claim 1, it is characterized in that utilizing eddy current source, main probe to combine standard plate is carried out to temperature survey with auxiliary infrared temperature probe, temperature control element etc., obtain △ T
mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410404589.1A CN104122032A (en) | 2014-08-18 | 2014-08-18 | Measuring method for quickly judging VIP vacuum degree |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410404589.1A CN104122032A (en) | 2014-08-18 | 2014-08-18 | Measuring method for quickly judging VIP vacuum degree |
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| CN104122032A true CN104122032A (en) | 2014-10-29 |
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| CN201410404589.1A Pending CN104122032A (en) | 2014-08-18 | 2014-08-18 | Measuring method for quickly judging VIP vacuum degree |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197821A (en) * | 2016-06-24 | 2016-12-07 | 南京凤源新材料科技有限公司 | A kind of table full-automatic wireless remote control vacuum heat-insulating plate internal pressure measurement device |
| CN110291325A (en) * | 2017-01-16 | 2019-09-27 | 克里奥塞尔特有限责任公司 | Device and method for determining the insulation quality of double walled vacuum thermally insulated container |
| US11959696B2 (en) | 2022-04-11 | 2024-04-16 | Whirlpool Corporation | Vacuum insulated appliance with pressure monitoring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579940A (en) * | 1991-09-24 | 1993-03-30 | Sharp Corp | Measuring method for degree of vacuum of vacuum packing body |
| US20050199067A1 (en) * | 2002-04-06 | 2005-09-15 | Va-Q-Tec Ag | Determination of the gas pressure in an evacuated thermal insulating board (vacuum panel) by using a heat sink and test layer that are intergrated therein |
| CN101788364A (en) * | 2010-01-29 | 2010-07-28 | 翟传伟 | Vacuum-degree detection device of vacuum thermal-insulation plate |
| CN202403868U (en) * | 2012-01-06 | 2012-08-29 | 厦门大学 | Vacuum degree measuring device for vacuum heat insulation plate |
| CN103235003A (en) * | 2013-04-18 | 2013-08-07 | 常州山由帝武节能新材料制造有限公司 | Vacuum thermal insulation board heat conductivity coefficient detection device |
-
2014
- 2014-08-18 CN CN201410404589.1A patent/CN104122032A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579940A (en) * | 1991-09-24 | 1993-03-30 | Sharp Corp | Measuring method for degree of vacuum of vacuum packing body |
| US20050199067A1 (en) * | 2002-04-06 | 2005-09-15 | Va-Q-Tec Ag | Determination of the gas pressure in an evacuated thermal insulating board (vacuum panel) by using a heat sink and test layer that are intergrated therein |
| CN101788364A (en) * | 2010-01-29 | 2010-07-28 | 翟传伟 | Vacuum-degree detection device of vacuum thermal-insulation plate |
| CN202403868U (en) * | 2012-01-06 | 2012-08-29 | 厦门大学 | Vacuum degree measuring device for vacuum heat insulation plate |
| CN103235003A (en) * | 2013-04-18 | 2013-08-07 | 常州山由帝武节能新材料制造有限公司 | Vacuum thermal insulation board heat conductivity coefficient detection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197821A (en) * | 2016-06-24 | 2016-12-07 | 南京凤源新材料科技有限公司 | A kind of table full-automatic wireless remote control vacuum heat-insulating plate internal pressure measurement device |
| CN110291325A (en) * | 2017-01-16 | 2019-09-27 | 克里奥塞尔特有限责任公司 | Device and method for determining the insulation quality of double walled vacuum thermally insulated container |
| US11959696B2 (en) | 2022-04-11 | 2024-04-16 | Whirlpool Corporation | Vacuum insulated appliance with pressure monitoring |
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Address after: 215400 Chengxiang City, Taicang Province town of the People South Road, No. 162, No. Applicant after: TAICANG PAIOU TECHNOLOGY CONSULTATION SERVICE CO., LTD. Address before: Taicang City, Suzhou City, Jiangsu Province, and 215400 Metro Jianxiong Road No. 20 Applicant before: TAICANG PAIOU TECHNOLOGY CONSULTATION SERVICE CO., LTD. |
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Application publication date: 20141029 |