CN109661049A - A kind of active flexible heating element and its preparation method and application - Google Patents
A kind of active flexible heating element and its preparation method and application Download PDFInfo
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- CN109661049A CN109661049A CN201811292213.0A CN201811292213A CN109661049A CN 109661049 A CN109661049 A CN 109661049A CN 201811292213 A CN201811292213 A CN 201811292213A CN 109661049 A CN109661049 A CN 109661049A
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Landscapes
- Surface Heating Bodies (AREA)
Abstract
The invention discloses a kind of active flexible heating element and its preparation method and application, the heater includes supporter, exothermic material and electrode；The preparation method of the heater is that supporter, exothermic material and electrode intertexture are made, and can be applied in carpet, underground heat, tracing system, clothes, protector and other insulating product fields；Heater provided by the present application changes conventional heater element filiform, rodlike physical aspect, makes fever more evenly；The bad problem of existing exothermic material pliability is changed, and has outstanding resistance to compression, folding, cutting characteristic can be cut out, can satisfy the demand of irregular heating, flexible heater and the heating of variable warm area.
Description
Technical field
The present invention relates to Novel heating Material Fields, breach the intrinsic form of conventional heating component, in particular to
The flexible active heating material for being the frivolous softness of one kind, can cutting out, cutting.
Background technique
Today's society, either industrial and agricultural production or common people's daily life, heating product are very universal, it might even be possible to say
The dependence to heating product is formd, heating product has become essential a part in daily production and life.
Traditional fever original part is broadly divided into two classes, and one kind is the heater of the fixed form such as metal electric heating silk, heating rod,
Uniformity of generating heat is bad, and same calandria is not available for cutting out, cut, it is more difficult to which satisfaction has irregular heating or flexible heater
Demand brings inconvenience to industrial production, life.Another kind of is the heating material for having certain flexibility, such as Electric radiant Heating Film
Deng.But Electric radiant Heating Film is mostly electrically conductive ink to be printed on the materials such as pte film using printing technology, then electricity is arranged in film two sides
Pole, product width is fixed but length is unlimited, operating voltage, unit area heating power be fixed, and heating temperature is still not
High value can be reached.Electric radiant Heating Film product has certain flexibility, and length can be cut out under the premise of not changing width, but not
Have the characteristic of resistance to compression, anti-folding, biggish pressure and bending, doubling application environment under calandria be easily damaged, length is appointed
It anticipates but width can not cut out cutting, application limitation is larger.
Summary of the invention
The object of the present invention is to provide a kind of flexible, heaters that can be cut out according to use environment.Particular technique
Scheme is as follows.The application provides a kind of active flexible heating element, and the heater includes supporter, exothermic material and electrode；Institute
The preparation method for stating heater is that supporter, exothermic material and electrode intertexture are made.
Further, above support is by soybean fiber, glass fibre, cotton, fiber crops, silk, hair, terylene, polyamide fibre, acrylic fibers, dimension
Synthetic fibre, polypropylene fibre, spandex, polyvinyl chloride fibre, nickel, nichrome, Aludirome, Bai Gang, carbon fiber, silver-ion fiber, other conductive fibers
Or one of fiber made of viscose glue or multiple fiber are constituted.Above support has multiple choices, root according to different purposes
It can also be changed according to purposes different size.In addition, difference depending on the application, a variety of differences may be used in unified specification product
Support fiber, to realize different function.
Further, the exothermic material is by nickel, nichrome, Aludirome, Bai Gang, carbon fiber, silver-ion fiber
Or one of other conductive fibers or multiple material are constituted.Exothermic material also has multiple choices according to different purposes, according to
Purposes different size can also change.
Further, the exothermic material can be composite material, still further, the heat generating fiber composite material
Including multilayered structure；Further, the exothermic material is by heat generating fiber and other fiber blends at mixing heat generating fiber, example
Spun yarn is such as mixed by heat generating fiber, long linter and viscous cotton fiber and constitutes mixing exothermic material.
The supporter and exothermic material surface can adhere to other functional coatings, such as surface is attached with the poly- bad ammonia of ε-
Acid and/or bamboo-leaves flavones antibacterial agent, carbon fiber short (more uniform temperature can be made), graphene (heating conduction can be made more excellent).
Further, the electrode is aluminium, copper, aluminium alloy, copper alloy, Bai Gang, nickel, nichrome, Aludirome, carbon
One of fiber, silver-ion fiber or other conductive fibers or multiple material are constituted.Electrode material also can according to different purposes
There are many selections, and different size can also change depending on the application.
Particularly, the electrode is Bai Gang, nickel is complexed the material with resistance such as gold, and one or more power supplys are from electrode
The access of different points can allow product of the invention to have a different warm areas seamlessly transitted completely, for example, m shape curve or other
Any curve.This is the temperature change in unified plane on different location, but the temperature in each dimension is identical.It is multiple
Power supply accesses from the different points of electrode and constitutes multi-electrode strategy, is formed in same plane, and difference warp, the multi-point temperature of latitude are flat
It slips over and crosses.
Such as the electrothermal cloth of one piece of 100cm*100cm of production, gold is complexed with nickel in electrothermal cloth two sides and does electrode, then
It powers at 1cm to cloth, then the heating temperature measured at 1cm, 25cm, 50cm, 75cm, 100cm is successively decreased, because more arriving
The voltage that distal end is got is lower, and for power with regard to smaller, temperature is also lower, and this temperature change is smoothed curve.If electricity
Source is accessed from 50cm, then temperature is minimum at the 1cm, temperature is medium at 25cm, temperature highest at 50cm, at 75cm in temperature
It is minimum Deng temperature at, 100cm, the n deformation of temperature is realized, medium temperature highest extends then temperature to both ends and is gradually lower.
Further, the supporter, exothermic material and electrode are not limited to the fiber of uniform thickness, can be according to reality
Situation, same root fiber are in the diameter change of certain rule, can not also be in the variation of rule.
Further, the supporter, exothermic material the section of fiber be not limited to circle, the section of fiber can be more
Kind shape constitutes the heterotypic fibre of diversified forms, such as common supporter is circular polyester fiber as knitting wool using cross section,
It is also easy to produce feeling of oppression and heat, easy static electrification, stains the problems such as dust.Using special-shaped synthetic fibers, i.e., with the suede yarn of saw-tooth shaped cross section
Fiber, the fiber of sawtooth profiled-cross-section form a lot of groove, have wicking, the steam or liquid discharged conducive to human body
It drips and is exported to outside, the feeling of oppression and heat of cloud blanket is greatly lowered.
The specific preparation method that the application provides heater is that supporter, exothermic material and electrode intertexture are made.
Further, three kinds of constructs of the active flexible heating element are filiform, when preparation, supporter warp,
Interweave respectively in broadwise, exothermic material is interweaved in latitude or upwards, or is interweaved respectively in warp, broadwise, and electrode is in warp or broadwise
Upper intertexture.
Further, when preparation, uniform interleaving, exothermic material are equal upwards in latitude or warp respectively in warp, broadwise for supporter
Even intertexture, or the uniform interleaving in warp and weft direction, and electrode uniform interleaving on warp or broadwise.
Further, when preparation, supporter is uneven respectively in warp, broadwise to interweave, and exothermic material is in latitude or through upward
It is uneven to interweave, or unevenly interweave in warp and weft direction, and electrode unevenly interweaves on warp or broadwise.
Further, when preparation, supporter with warp or broadwise interweave respectively at an angle, exothermic material with warp
Or broadwise interweaves respectively at an angle, supporter and exothermic material at an angle, are not limited to vertical.
Further, when preparation, in planar development, supporter and exothermic material may be configured as a variety of curves or broken line, no
It is confined to straight line, supporter and exothermic material can form the interleaving mode of various shapes, such as annular, and petal, waveform is cyclic annular
Polygon etc..
There are many forms on interleaved arrangement for supporter, exothermic material and electrode, different according to function and purposes no matter
Through, latitude, there is the uniform non-uniform intertexture in certain specification.To cope with different purposes, under specific circumstances, in a piece of hair
In hot body, the intertexture of different densities and different interleaving angle can also be presented in different parts.
Further, supporter, exothermic material and electrode are not limited to the planar structure of single layer on interleaved arrangement, in spy
Determine under service condition, can be interleaved in three-dimensional space, constitutes layer stereo structure.
Further, supporter, exothermic material and electrode are not limited to independently of each other in intertexture, can also be by therein two
It plants or three kinds of fiber blends is at composite fibre, then by obtained mixing fiber interweaving at other forms.
Further, heater provided by the present application can apply carpet, underground heat, tracing system, clothes, protector and
The fields such as other insulating products.
Calorific value of the present invention is not constant, and heating area, operating voltage, power, calorific value are all can be according to reality
Situation is different from conventional heating element " under fixed voltage, according to constant power work come what is adjusted and customized in real time
Make.And issue fixed heat ", so not doing the relevant monitoring of fever.Resistance to compression etc. is also same.
The present invention is equipped with the related ancillary technique such as electric leakage safeguard protection or equipment, low-voltage are protected without safe insulation, but
Exposed cloth cover contact short circuit is prevented, so needing to be packaged with other clothes or other materials.High voltage needs safety
Insulating protection, according to use environment difference, surface need to seal pvc, polyimides, the materials insulation film such as pet, tpu, pvc.
Since the application is by interweaving on a support electrode and exothermic material, allow the heater obtained certain
Direction is cut, simultaneously because the flexibility of supporter improves resistance to compression, the folding quality of heater in turn, can also be passed through
The property and connection type of regulation heating material further change the watt level of heater.
The utility model has the advantages that heater provided by the present application changes conventional heater element filiform, rodlike physical aspect, make to send out
Heat is more evenly；The bad problem of existing exothermic material pliability is changed, and has outstanding resistance to compression, folding, can cut out and cut
Characteristic is cut, can satisfy irregular heating or flexible heater demand.
Detailed description of the invention
The structural schematic diagram of Fig. 1 heater；
Fig. 2 heater connects power supply architecture schematic diagram；
The structural schematic diagram of Fig. 3 heater cutting；
The structural schematic diagram of blanket heating object is made in Fig. 4 heater；
Fig. 5 heater is applied to the structural schematic diagram of agriculture field；
Fig. 6 heater is applied to the structural schematic diagram of aquaculture field；
Application of Fig. 7 heater in pipeline tracing system；
Application of Fig. 8 heater on clothes；
Fig. 9 electrothermal cloth A type schematic diagram；
Figure 10 electrothermal cloth Type B schematic diagram；
Figure 11 electrothermal cloth c-type schematic diagram；
Figure 12 electrothermal cloth D type schematic diagram；
The temperature that Figure 13 is Figure 12 seamlessly transits schematic diagram；
Figure 14 is the schematic diagram of single electric blanket；
Figure 15 is the temperature change schematic diagram of Figure 14；
Figure 16 is heater schematic diagram used in protector.
1 heater in figure, 2 supporters, 3 exothermic materials, 4 electrodes, 5 insulating films, 6 conducting wires, 7 power supplys, 8 controls
Device processed, 9 heat insulation layers, 10 surface layers, 11 heaters a part, 12 shear lines, 13 soil horizons, 14 water layers, 15 pipelines, 16
Insulating layer, 17 clothes.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
As shown in Figure 1, heater 1 provided by the present application includes supporter 2, exothermic material 3 and electrode 4, supporter 2 exists
Through being made in, broadwise with exothermic material 2,4 uniform interleaving of electrode, exothermic material 3 is uniform with supporter 2 and electrode 4 in broadwise
Intertexture is made, and electrode 4 is being made with supporter 2 and 3 uniform interleaving of exothermic material upwards；The application is by by electrode and fever
Material interweaves on a support, cuts the heater obtained in certain directions, simultaneously because the softness of supporter
Property so improve resistance to compression, the folding quality of heater, can also be by the property of regulation heating material and connection type into one
Step changes the watt level of heater, further illustrates below by embodiment.
In actual application, heater 1 is connected by conducting wire 6 with power supply 7, i.e., it is heatable.
Embodiment 1:
As shown in Fig. 2, a kind of active flexible heating element 1, is connected by conductor wire 2 with power supply, then active flexible exothermic material 1 can
Consistent heat generation.
Embodiment 2:
As shown in figure 3, a kind of active flexible heating element 1, wipes out heater a part 11 along shear line 12, heater 1 is logical
Conducting wire 6 is crossed to be connected with power supply, then a kind of active flexible exothermic material 1 can also consistent heat generation, and the heating effect under identical voltage
It is equivalent with embodiment 1；Due to calandria provided by the present application be electrode and exothermic material are combined by way of intertexture so that
Gained corresponding product can laterally, it is longitudinally cutting, while can pass through different heating material selection change calandria power
And then adapt to the demand of different field.
Embodiment 3:
As shown in figure 4, a kind of active flexible heating element 1, two sides covers insulating film 5, and lowest level 9 is heat insulation layer, and topmost 10 are
Surface layer, a kind of active flexible heating element 1 are connected by conducting wire 6 with power supply and controller 8, then a kind of active flexibility exothermic material 1
It can be made into blanket calandria, wherein surface layer 10 can be flooring laminate, carpet, bamboo mat, heat-resisting fabric or other industrial and agricultural productions, life
In sheet article.
It is as shown in Figure 5 that for the plant that passes the winter heat is provided using in agricultural production；
Similar heater can be also used in aquaculture, as shown in Figure 6.
Embodiment 4:
As shown in fig. 7, a kind of active flexible heating element 1, two sides covers insulating film 5, and innermost layer is conveyance conduit 15, and outermost layer is
Insulating layer 16, a kind of active flexible heating element 1 are connected by conducting wire 6 with power supply and controller 8, then a kind of active flexible heating element
1 can be made into pipeline tracing system.
Embodiment 5:
As shown in figure 16, a kind of active flexible heating element, the application in waist support, 1 is heater, and 2 be connecting line band connection-peg,
3 be switch button (temperature controller)；Wherein, the size and form of heater can be adjusted flexibly according to the actual situation,
Electric power connection line can be adjusted according to the actual situation, and temperature controller can have multiplex form, it is also possible to not have to temperature
Controller is spent, these are all flexibly, and the electric power connecting head in this figure is USB head, and in practice may be DC, magnetic connector
Or other forms, the shape of this protector are also to be adjusted flexibly according to the actual situation, can all be had in practical implementation
Variation；The example above is signal expression, there is multi-form expression and selection in practical applications, has only done function here
Property and principle statement, concrete example here not limits the scope of the invention, but passes through the tool of characteristic example
Body description, it was demonstrated that this programme can be applied in the relevant product with same or similar design concept, the present embodiment institute
Representative is protector class product, such as: neck guard, shoulder protector, waist support, elbow support, wrist guard, knee-pad, ankle guard and other products.
Embodiment 6:
As shown in figure 8, a kind of active flexible heating element 1, on 17 product of clothing, a kind of active flexible heating element 1 is logical for sewing
It crosses conducting wire to be connected with power supply and controller, then a kind of active flexible heating element 1 can be made into the functional clothing for having calorific capacity.
Wherein clothing heat-emitting products can be dress, lower dress or underwear etc., and a kind of active flexible heating element 1 can be according to different demands
It sews in any position of clothes.Clothes electrothermal cloth is made of dacron thread, copper wire, three kinds of carbon fiber wire, wherein copper wire is single
Specification is 0.07, and every 10 with twisting bunchy, and every 12 beam is 1, and every 2 are 1 group.When weaving, copper wire through upward close-packed arrays,
It is 1 group at interval of 4 centimetres, organizes 10 centimetres of spacing.In broadwise, fiber and Carbon fibe is supported to be alternately arranged according to certain rule,
The middle every 1 inch of circulation primary of Carbon fibe.At cloth as unit of group, takes 10-15 centimetres to cut out in flakes, can be used for heating clothes.
Embodiment 7:
A kind of active flexible heating element, for carpet cloth.Carpet is made of with electrothermal cloth supporter dacron thread, hot-melt yarn, electricity
Polar filament is made of copper wire, white steel wire, and heating wire is made of carbon fiber wire, white steel wire.Wherein, the single specification of copper wire is 0.2, every 10
With twisting bunchy, every 20 beam is 1, and every 2 are 1 group.When weaving, copper wire and white steel wire according to 3:1 through upward close-packed arrays,
It is 1 group at interval of 140 centimetres.Longitude and latitude is upward, and fiber dacron thread and fused yarns is supported to be worked out according to 1:1 ratio, sends out
Heated filament Carbon fibe and white steel wire are combined according to 1:2 ratio, are arranged according to the white steel sequence of white steel-Carbon fibe-, every 1 inch of circulation 2
It is secondary.Electrode copper wire and white steel wire carry out evenly distributed according to 5:1 proportion.After weaving, insulation pvc or other insulation materials are selected
Fabric hot-melt yarn is melted by hot pressing mode and the materials such as pvc carries out sending an insulation by material.After positive back insulation-encapsulated, at
1.5 meters of cloth door, can be at by Uneven Width width cut-parts, it can be used for carpet heating.
Embodiment 8:
A kind of active flexible heating element, for multi-temperature zone low-voltage electrical heating blanket cloth.Multi-temperature zone low-voltage electrical heating blanket is supported with electrothermal cloth
Object is made of dacron thread, hot-melt yarn, and electrode is made of white steel wire, and heating wire is made of Bai Gangsi or Carbon fibe.Wherein, through broadwise
On, support fiber dacron thread and fused yarns to be worked out according to 3:1 ratio, every 1 inch of heating wire recycles 1 time.Wire electrode
Spacing is 90 centimetres.After weaving, high-quality fabric is selected, by hot pressing mode, electrothermal cloth and fabric are packaged.This is
System is 24 volts of low-voltage power supply schemes, and by taking single electric blanket as an example, this electric blanket need to be in back, three corresponding positions of shank and foot
It sets, respectively and couples electricity, it can be achieved that back, three opposite high-temperature areas of shank and foot divide warm area to heat to realize.Encapsulation
After connecting with power supply, cut-parts on demand can be at.For people in sleep procedure, head does not need heat, buttocks and thigh to the need of heat
Ask also very low, main hot spot is back, shank and foot.So our this product can according to human body actual demand into
The distribution of row heat.This design is not only to make heat distribution more reasonable, and this heating strategy can be with 50% or more energy conservation, together
When, completely smooth excess calories will not allow people to generate any discomfort.
Embodiment 9:
The electrothermal cloth that a kind of active flexible heating element is 100cm*100cm, does electrode, power supply with nichrome in electrothermal cloth two sides
Accessed from 50cm, temperature is minimum at the 1cm, temperature is medium at 25cm, temperature highest at 50cm, at 75cm temperature it is medium,
Temperature is minimum at 100cm, realizes the n deformation of temperature, and medium temperature highest extends then temperature to both ends and is gradually lower.
Embodiment 10:
The electrothermal cloth that a kind of active flexible heating element is 100cm*100cm, it is uniformly or uneven in electrothermal cloth two sides and middle position
It is even that gold 4 groups of electrodes of arrangement are complexed with nickel, give electrode 1,2 to power at 1cm, to 2,3 power supplies at 50cm, at 75cm to 3,
4 power supplies, then may be formed at multiple and different warm areas in same plane.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of active flexible heating element, which is characterized in that the heater includes supporter, exothermic material and electrode, described
The preparation method of heater is that supporter, exothermic material and electrode intertexture are made.
2. active flexible heating element according to claim 1, which is characterized in that the above support by soybean fiber,
Glass fibre, cotton, fiber crops, silk, hair, terylene, polyamide fibre, acrylic fibers, polyvinyl, polypropylene fibre, spandex, polyvinyl chloride fibre, nickel, nichrome, ferrum-chromium-aluminum close
One of fiber made of gold, Bai Gang, carbon fiber, silver-ion fiber, other conductive fibers or viscose glue or multiple fiber are constituted.
3. active flexible heating element according to claim 1, which is characterized in that the exothermic material by nickel, nichrome,
One of Aludirome, Bai Gang, carbon fiber, silver-ion fiber or other conductive fibers or multiple material are constituted.
4. active flexible heating element according to claim 1, which is characterized in that the electrode is aluminium, copper, aluminium alloy, copper
One of alloy, Bai Gang, nickel, nichrome, Aludirome, carbon fiber, silver-ion fiber or other conductive fibers are more
Kind material is constituted.
5. active flexible heating element according to claim 1, which is characterized in that three kinds of structures of the active flexible heating element
It is filiform at object.
6. active flexible heating element according to claim 5, which is characterized in that the preparation side of the active flexible heating element
Method are as follows: supporter interweaves respectively in warp, broadwise, and exothermic material is interweaved in latitude or upwards, and electrode is submitted in warp or broadwise
It knits.
7. active flexible heating element according to claim 6, which is characterized in that the preparation method is that: supporter warp,
Uniform interleaving is distinguished in broadwise, exothermic material is in latitude or through upward uniform interleaving, and electrode uniform interleaving on warp or broadwise.
8. the application of active flexible heating element according to claim 1, which is characterized in that carpet, underground heat, tracing system,
The application of clothes, protector and other insulating product fields.
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| CN201811292213.0A CN109661049A (en) | 2018-11-01 | 2018-11-01 | A kind of active flexible heating element and its preparation method and application |
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| CN110723055A (en) * | 2019-11-22 | 2020-01-24 | 中国人民解放军32181部队 | Grouped heating and heat-preserving dining car and grouped heating method thereof |
| CN112566291A (en) * | 2019-09-10 | 2021-03-26 | 北京碳阳科技有限公司 | Flexible heating cloth |
| CN113215708A (en) * | 2021-05-20 | 2021-08-06 | 常州市碳维观致智能科技有限公司 | One shot forming's far infrared health preserving blanket |
| WO2022237496A1 (en) * | 2021-05-10 | 2022-11-17 | 上海市第六人民医院 | Graphene physiotherapy elbow pad |
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Application publication date: 20190419 |