CN202063869U - Phase-change energy storage thermal pad - Google Patents
Phase-change energy storage thermal pad Download PDFInfo
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- CN202063869U CN202063869U CN2010206707901U CN201020670790U CN202063869U CN 202063869 U CN202063869 U CN 202063869U CN 2010206707901 U CN2010206707901 U CN 2010206707901U CN 201020670790 U CN201020670790 U CN 201020670790U CN 202063869 U CN202063869 U CN 202063869U
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Abstract
The utility model provides a phase-change energy storage thermal pad, which belongs to the technical field of functional composite materials. According to knowledge of chemical thermodynamics and physical hygience, the phase-change energy storage thermal pad aims to overcome defects of supercooling, precipitation and low heat-transfer coefficient and the like of phase-change energy storage materials used as novel energy sources. The thermal pad consists of a face fabric layer, a protective layer, a sponge layer, a thermal storage layer, a heating layer and a heat insulation layer, wherein the key for making the thermal pad is preparation of materials of the thermal storage layer, the thermal storage layer is made of a material which is formed by physical fusion of stearic acid and Na2HPO4.12H2O according to the mass proportion of 2:3, and 1 wt% polyacrylamide is added simultaneously, so that defects of the organic material and the nonorganic material can be overcome. The phase-change energy storage thermal pad has excellent stability and fine performance in thermal storage and release, and can not only preserve heat but improve comfortableness conditions in terms of resting or sports of people and meet requirements on convenience and practicability.
Description
Technical field
The utility model belongs to the functional composite material technical field, particularly a kind of phase-change accumulation energy heat pad.
Background technology
Most important problem is energy-conservation and environmental protection in the field of energy utilization, and the phase-changing energy-storing technology is to utilize the latent heat of phase change of phase change material to carry out an environment-friendly energy-saving technology of energy storage (accumulation of heat, cold-storage), can alleviate the energy both sides does not match on time, intensity and place, being reasonable energy utilization and the effective way that alleviates environmental pollution, also is the effective means that improves energy utilization rate.Utilize energy accumulating technique, the energy storage when supply exceed demand is got up, supply and demand will the time use, so both can improve the urgency that rate of energy also can be alleviated energy utilization.Making full use of the latent heat of phase change accumulation of energy becomes the focus of scientific research field.
Phase-changing energy storage material can absorb heat (cold) and measure or measure to environment rejected heat (cold) in its thing phase change process from outside atmosphere, thereby realizes the storage and the release of energy.Utilize this feature of phase-changing energy storage material, recycling, the industry that can be applied to " peak load shifting ", used heat and the waste heat of sun power utilization, electric power heats with covil construction and fields such as the energy-conservation and aerospace of air-conditioning, textile industry.Therefore phase-changing energy storage material is subject to people's attention day by day, is with a wide range of applications.
Abroad the research work of phase change material (PCM) was just begun as far back as the sixties in 20th century, research at that time mainly is to be purpose with energy-conservation, mainly concentrates on the inorganic salt hydrate aspect.But the shortcoming of inorganic salt hydrate material is to have bigger condensate depression and significantly separate out phenomenon, and the thermal stability problems under the cycleoperation.Still can't effectively solve even added nucleator and dispersion agent, limit the application of eutectic salts.Yet with paraffin, alkane, lipid acid is that the organism of representative is the emphasis of research organic phase change material both at home and abroad at present, its advantage mainly shows Heat stability is good, price is more cheap, heat-storage density is big, better heat stability, non-corrosiveness, the mistake cold-peace phase demixing phenomenon of no hydration salt phase change material; Shortcoming is that thermal conductivity is very low, causes it to show the shortcoming that heat transfer property is poor, the accumulation of heat utilization ratio is low in the application of hold over system, thereby has reduced the usefulness of system, has greatly limited the Application Areas of organic phase change material.The utility model is the characteristics of the heat conductivility difference of using phase-change material own just, this shortcoming is used and improves, and in conjunction with the knowledge of chemical thermodynamics and physiological hygiene aspect, from changing people's quasi-tradition passive type warming mode of keeping out the cold, turning to the thermoregulated mode of active heating is starting point, development intelligence " phase-transition heat-storage pad ".
The utility model content
The purpose of this utility model provides a kind of phase-change accumulation energy heat pad, to improve the mistake cold-peace phenomenon of phase separation of crystalline hydrate salt, problems such as stearic thermal conductivity is little make phase change material have high strength, high thermal conductivity, high-modulus, high mar-proof, corrosion-resistant, low density, good snappiness, stronger characteristics such as heat storage capacity simultaneously.In addition, also have simple to operately, process is easy to control, advantage such as synthesis temperature is low.
The utility model provides a kind of phase-change accumulation energy heat pad.This heat pad is by precoat, protective layer and agent structure constitute, agent structure wherein is made up of spongy layer 1, recuperation layer 2, zone of heating 3, thermal insulation layer 4 four parts, the agent structure innermost layer is a zone of heating 3, the upper strata is a recuperation layer 2 outside the zone of heating 3, lower floor is a thermal insulation layer 4, is spongy layer 1 outside thermal insulation layer 4 and the recuperation layer 2; The periphery of agent structure is followed successively by protective layer 5 and precoat 6 from inside to outside, and protective layer 5 materials are the hydrogen synthetic fibre, and precoat 6 materials are cotton material.
The phase-changing energy storage material of filling in recuperation layer 2 is stearic acid and Na
2HPO
412H
2The physics fusions of O, the mass ratio of fusion is 2: 3, and to add mass percent simultaneously be 1% polyacrylamide.
In the phase change material that the utility model adopted, the stearic acid molecular formula is C
18H
36O
2, be white oblique system prism, be a kind ofly to be present in saturated fatty acid in the animal tallow with glyceride form.Fusing point is generally between 60-70 ℃.Boiling point (1 standard atmospheric pressure) is 383 ℃.Be difficult for taking place chemical reactions such as autoxidation, reduction, addition.Lipid acid has dehydration and pyrolysated character simultaneously, but the thermolysis dehydration will just can take place more than 350 ℃.Stearic acid is as phase change material commonly used, and have higher potential heat value, do not have that cold-peace is separated out, steady performance, be a kind of nontoxic non-corrosiveness material, shortcoming is that thermal conductivity is little.
Na
2HPO
412H
2O is called disodium hydrogen phosphate dodecahydrate again, and white or colourless oblique system prismatic crystal is nontoxic, about 35 ℃ of fusing points, and proportion 1.52, non-under the environment of strong acid, be difficult for taking place chemical reaction.Lose whole crystal water and become anhydride when temperature is 125 ℃, 250 ℃ resolve into trisodium phosphate.Have high potential heat value, advantages such as accumulation of heat, good heat conductivity, shortcoming are to have surfusion.
Layer sponge one that add that the utility model adopted is to make the people feel comfortable, the 2nd, can play the effect of indirect heat transfer.The thickness of sponge is decided on the different qualities of selecting sponge material for use, generally at 4-5cm.
Heat-storing material that the utility model adopted and zone of heating are the main bodys of heat pad, heating is mainly by utilizing the form of power supply heating heat-storing material, at the environment snugness, under the situation that does not need to warm oneself, come to carry out accumulation of heat by power supply, to preserve heat to the heat pad.When environment changes, when people need warm oneself, give human body transmission ofenergy by heat-storing material again, realize the intermittent type utilization of the energy.In order to avoid or to reduce in the phase transition process as far as possible owing to flowing of liquid phase makes material the inhomogeneous ununiformity of leading the heating pad heating surface occur in recuperation layer, encapsulated the passive framework of one deck at recuperation layer, to a certain extent fixing heat-storing material flow deformation.Zone of heating thickness is between 1-2cm.
The thermal insulation layer material that the utility model adopted is the perforating rubber sponge, and thickness is 2-3cm, and effect is to make heat to a useful side transmission in heating and heat release as far as possible.
The heating film that the utility model adopted is homemade simple and practical, cheap film.Its hot face is that the silica gel spiral heating line by high thermal resistance twines the heat form that the terylene cloth cover forms, and the line that wherein generates heat partly is high temperature resistant, corrosion-resistant, epidermis rubber insulation height, the exothermic material that heat-radiating properties is good.Whole hot spots heating power is 40W, and surperficial Heating temperature is in the time of 120 ℃, and no abnormal phenomenon takes place.Certainly, if heat-up time is long, can consider in heat pad heating film, thermostat to be installed.
The utlity model has following beneficial effect:
Phase-transition heat-storage heat pad mainly is to process design according to the temp regulating function that the accumulation of heat textiles has.Accumulation of heat heat pad as positive adjusting human body and around the daily necessities of microclimate, not only adapt to the 21 century people and pursue the comfortableness of life, demand conveniently, and satisfied long-term outside or be in warming requirement than the people in the cold environment.The invention of this product has broken through the simple idea with the electricity heating of articles for use such as traditional electrical heating cushion, from human body comfort and safety perspective, make body temperature be in a kind of comfortable state as far as possible, can warmingly can improve comfort conditions and the convenient and practical requirement that people have a rest or move again thereby reach.
Heat pad product in the utility model does not change through its character after holding heat release repeatedly, and it is stable very good that heat is filled up.The heat release time of holding of heat pad product is substantially about 3 hours and 8 hours.Heat pad surface temperature is the highest substantially about 55 ℃, and the heat release outlet temperature maintains about 26 ℃ substantially, and under external environment or indoor situation to be warmed oneself, this temperature is fit to the human body requirement very much, has the good exothermicity of holding.
Description of drawings
Fig. 1: heat pad main structure chart;
Fig. 2: heat pad product structure figure;
Among the figure, 1-spongy layer, 2-recuperation layer, 3-zone of heating, 4-thermal insulation layer, 5-protective layer, 6-precoat.
Embodiment
Below in conjunction with embodiment the utility model is elaborated.
Phase change heat storage material layer in the utility model is stearic acid and Na
2HPO
412H
2The physics of O merges, and the mass ratio of fusion is 2: 3, and to add mass percent simultaneously be 1% polyacrylamide.
The latent heat of the utility model phase change heat storage material and the test of fusing point can be adopted differential scanning calorimeter (DSC), measure to find: stearic acid just has part to melt since 50 ℃, and the latent heat of phase change size is about 200J/kg.Na
2HPO
412H
2O fusing point (transformation temperature) is 35 ℃, and latent heat of phase change is 246J/kg.As can be seen, Na
2HPO
412H
2The fusing point of O and latent heat all are fit to human body self to cold and hot sensation very much.And as hot cushion material owing to itself have an effect of heat insulating, so the stearic acid of selecting to have higher melt is in harmonious proportion and Na
2HPO
412H
2The ratio of O is in harmonious proportion transformation temperature with this, and the temperature that contacts of balance people and heat pad whereby is to reach not only comfortable but also permanently effective effect.
Na in the utility model
2HPO
412H
2The condensate depression of O is not very high, and generally about 10 degree, experiment shows that stearic acid is as Na
2HPO
412H
2The nucleator of O is effective.For Na
2HPO
412H
2O separates out, and mainly is to wherein adding polyacrylamide as thickening material.By to Na
2HPO
412H
2O adding mass percent is 1% polyacrylamide, can be good at preventing Na
2HPO
412H
2Problem of phase separation during the O crystallization.
The preparation method of phase change heat storage material is as follows in the utility model: at first weigh in the balance and get a certain amount of stearic acid and Na
2HPO
412H
2O is placed in the different beakers in dividing after the ratio weighing that sets, and adds a cover a cover glass on beaker.Beaker is placed on heating and melting on the magnetic force heating stirrer, as stearic acid and Na
2HPO
412H
2O reaches the fusing point of self respectively and when melting fully, with Na
2HPO
412H
2O solution adopts the mode of glass stick drainage together to pour in the beaker that fills stearic acid solution together with the moisture on the cover glass, and to the polyacrylamide that wherein adds 1%.At this moment constant magnetic stirring apparatus is temperature-resistant, and the two kinds of mixing materials of stirring that do not stop with constant speed, to the last material mixing evenly and occur till the glue, can turn off magnetic stirring apparatus this moment, takes out material, the mixing process of whole material finishes.
Mixing material is carried out Infrared spectroscopy as can be known: Na
2HPO
412H
2O and stearic acid itself do not react, and are a kind of fusions of physics, so the potential heat value of mixing material also should be both neutralizations.In fact, mixing material is carried out DSC test, the latent heat of phase change value that obtains mixing material is 238.4J/g, and it is fine that the value that records respectively with two kinds of materials is coincide in proportion.Illustrated that once more this material is that simple physics merges and do not have chemical reaction, promptly physicochemical property separately all do not change.
The test that hot pad holds exothermicity in the utility model is mainly estimated from two indexs of temperature and time.Test shows, the heat release time of holding of heat pad product is substantially about 3 hours and 8 hours.Heat pad surface temperature is the highest substantially about 55 ℃, and the heat release outlet temperature maintains about 26 ℃ substantially, and under external environment or indoor situation to be warmed oneself, this temperature is fit to the human body requirement very much, has the good exothermicity of holding.
Claims (3)
1. a phase-change accumulation energy heat is filled up, by precoat, protective layer and agent structure constitute, it is characterized in that described agent structure is made up of spongy layer (1), recuperation layer (2), zone of heating (3), thermal insulation layer (4) four parts, the agent structure innermost layer is zone of heating (3), the upper strata is recuperation layer (2) outside the zone of heating (3), and lower floor is thermal insulation layer (4), is spongy layer (1) outside thermal insulation layer (4) and the recuperation layer (2); The periphery of agent structure is followed successively by protective layer (5) and precoat (6) from inside to outside, and protective layer (5) material is the hydrogen synthetic fibre, and precoat (6) material is a cotton material.
2. according to claims 1 described a kind of phase-change accumulation energy heat pad, it is characterized in that, in described recuperation layer (2), fill phase-changing energy storage material.
3. according to claims 1 described a kind of phase-change accumulation energy heat pad, the thickness that it is characterized in that described spongy layer (1) is 4-5cm, thermal insulation layer (4) is the perforating rubber sponge, thickness is 2-3cm, zone of heating (3) is to twine the self-control heating film that the terylene cloth cover forms by the silica gel spiral heating line of high thermal resistance, and thickness is between 1-2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206707901U CN202063869U (en) | 2010-12-10 | 2010-12-10 | Phase-change energy storage thermal pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206707901U CN202063869U (en) | 2010-12-10 | 2010-12-10 | Phase-change energy storage thermal pad |
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|---|---|
| CN202063869U true CN202063869U (en) | 2011-12-07 |
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|---|---|---|---|
| CN2010206707901U Expired - Fee Related CN202063869U (en) | 2010-12-10 | 2010-12-10 | Phase-change energy storage thermal pad |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173114A (en) * | 2010-12-10 | 2011-09-07 | 北京工业大学 | Phase-change energy-storage hot pad and preparation method thereof |
| CN103171176A (en) * | 2011-12-26 | 2013-06-26 | 辽宁辽杰科技有限公司 | Thermoplastic resin composite material and preparation method thereof |
-
2010
- 2010-12-10 CN CN2010206707901U patent/CN202063869U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173114A (en) * | 2010-12-10 | 2011-09-07 | 北京工业大学 | Phase-change energy-storage hot pad and preparation method thereof |
| CN103171176A (en) * | 2011-12-26 | 2013-06-26 | 辽宁辽杰科技有限公司 | Thermoplastic resin composite material and preparation method thereof |
| CN103171176B (en) * | 2011-12-26 | 2016-04-20 | 辽宁辽杰科技有限公司 | A kind of thermoplas tic resin composite and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20121210 |