CN201893950U - Heating wire capable of bearing high heat-flow density - Google Patents
Heating wire capable of bearing high heat-flow density Download PDFInfo
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- CN201893950U CN201893950U CN2010205907116U CN201020590711U CN201893950U CN 201893950 U CN201893950 U CN 201893950U CN 2010205907116 U CN2010205907116 U CN 2010205907116U CN 201020590711 U CN201020590711 U CN 201020590711U CN 201893950 U CN201893950 U CN 201893950U
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- foil
- heating wire
- insulating layer
- heating line
- heating
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Abstract
The utility model discloses a heating wire capable of bearing high heat-flow density, also including a heating tape or a heating body with other shapes. The heating wire comprises a resistance wire, an insulating layer and a cladding layer, wherein the insulating layer is wrapped outside the resistance wire, the cladding layer is closely wrapped outside the insulating layer; the cladding layer is made of material whose heat conductivity is greater than that of the insulating layer at the same temperature, and the cladding layer is made of the material such as gold foil, silver foil, aluminum foil, copper foil, tin foil, iron foil, nickel foil, zinc foil or the like. In the utility model, the cladding layer which is made of the material whose heat conductivity is greater than that of the insulating layer is wrapped outside the insulating layer of the traditional heating wire, the heat of the insulating layer is sent back to a heated body through the cladding layer, therefore, the whole heat conductivity of the heating wire is improved, the whole heat transfer property of the heating wire is enhanced, the temperature difference at the inner side and outer side of the heating wire is reduced, the energy loss is reduced, the energy utilization rate is improved, and the service life of the heating wire is prolonged; in addition, the heat born by the heating wire of unit length is increased, therefore, the using amount of the heating wire is reduced.
Description
Technical field
The utility model relates to the heating product technical field, is specifically related to be used for the electrically heated places of needs such as air conditioner refrigerating, pipe insulation, building and heating, and its product is mainly reflected in electricity heating line, electric heating tape, reaches the electro-heat equipment of other shape.
Background technology
Electricity heating line or electric heating tape are the electric heating products commonly used that all can be applied in many fields such as air conditioner refrigerating, pipe insulation, building and heatings, its kind has many, but principle is all similar, compare with other synthetic rubber, advantages such as silicon rubber has good heat conductivity, flexibility, and high temperature resistant, ageing-resistant, electrical insulation properties is good.Silicon rubber heating line be with silicon rubber as clad material, be heater with various alloys etc., extrude sulfidization molding through Rubber Extruder.The heat conductivility of ordinary silicon rubber is relatively poor, and conductive coefficient has only about 0.2W/ (mK) usually, and adding heat filling is a kind of method that improves the heat conductivility of silicon rubber.General heat filling commonly used has: materials such as metal dust, metal oxide, nitride.Humans such as A.Nakano contain Al
2O
3Make the heat-conducting layer of electronic devices and components when being 3 times of silicon rubber, the conductive coefficient of material can reach 2.72W/ (mK); People such as Wang Qian find to add SiC in RTV silicon rubber, and conductive coefficient can reach 2.7W/ (mK), studies show that at present the raising degree of conductive coefficient is relevant with packing variety, particle diameter and distribution thereof.
Utilize existing silicon rubber heating line, find in practice: when the silicon rubber heating wire heats on heated object, the temperature of its side that do not contact with heated object can be far above the temperature of the side that contacts with calandria, and silicone rubber insulation layer is thick more, and the two temperature difference is just big more.This is because due to the relatively low conductive coefficient of silicon rubber, although the silicon rubber of composite material has improved 4～10 times than pure silicon glue conductive coefficient, in addition higher, in general still less than one of common metal even several magnitude.Because the heatproof degree of silicon rubber is limited, require generally therefore that the temperature of peak is lower than 200 ℃ in the use, limit by temperature difference, the nominal operation density of heat flow rate reduction of silicon rubber heating line.So just make that the loss of heat in heating process of traditional heating line is more serious, wasted the energy; And also aging impaired under the insulating barrier hot soak condition than being easier to, in the useful life of reducing the heating line, also increased the heating line use amount under specified heat demand simultaneously.
The utility model content
The technical problems to be solved in the utility model provides the heating line that a kind of implementation method is simple, effective, can carry high heat flux.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of have a heating line that can carry high heat flux, certainly the electro-heat equipment that also comprises heating tape and other shape, its structure comprises resistance wire and insulating barrier, insulating barrier is wrapped in the resistance wire outside, it is characterized in that: described heating line also comprises the surrounding layer of being made by the high thermal conductivity coefficient material, and surrounding layer tightly is wrapped in the insulating barrier outside; Described surrounding layer be under uniform temp conductive coefficient greater than the material of the conductive coefficient of insulating barrier, that is to say, as long as have the insulating barrier outside that enough ductility can be wrapping to the heating line, and conductive coefficient may be used to be made into surrounding layer greater than the material of insulating barrier.
Further, described surrounding layer is a metal forming, and metal forming had both had high thermal conductivity coefficient usually, and enough ductility is arranged again, is the more satisfactory material that is used to make surrounding layer therefore.
Further, described surrounding layer is goldleaf, silver foil, aluminium foil, Copper Foil, tinfoil paper, iron foil, nickel foil or zinc paper tinsel etc.
The surrounding layer of the utility model by making greater than the material of insulating barrier conductive coefficient by conductive coefficient at insulating barrier coated outside one deck of tradition heating line, by this surrounding layer the heat transferred of insulating barrier is returned heated object, thereby can improve the overall thermal conductivity of heating line, strengthen the whole heat transfer property of heating line, the temperature difference in the outside in reducing, do not having under the situation of heat-insulation layer, both can reduce energy loss, improve efficiency of energy utilization, play the effect of energy savings, can prolong the useful life of heating line again.Owing to can increase the unit length heating heat that line carried, thereby reduce the use amount of heating line, and the heating surface (area) (HS of heated object.
Description of drawings
Fig. 1 is the structural representation of the utility model heating line;
Fig. 2 is the structural representation of the utility model heating line cross section;
Fig. 3 is the structural representation of the utility model heating tape;
Fig. 4 be two kinds of heating lines under identical density of heat flow rate in outside difference curve figure;
Fig. 5 is the internal and external temperature dygorams of two kinds of heating lines under different density of heat flow rate;
Fig. 6 is two kinds of curve charts stabilization time under the different density of heat flow rate of heating line;
Fig. 7 is the graph of relation of two kinds of heating line hull-skin temperatures and density of heat flow rate.
Among the figure, 1 is resistance wire, and 2 is insulating barrier, and 3 is surrounding layer.
Embodiment
In the present embodiment, with reference to Fig. 1, Fig. 2 and Fig. 3, the described heating line that can carry high heat flux, certainly also comprise heating tape, its structure comprises resistance wire 1, insulating barrier 2 and surrounding layer 3, and insulating barrier 2 is wrapped in resistance wire 1 outside, and surrounding layer 3 tightly is wrapped in insulating barrier 2 outsides; Resistance wire 1 is a constantan, and insulating barrier 2 is a silicon rubber, and surrounding layer 3 adopts aluminium foils, goldleaf, silver foil, aluminium foil, Copper Foil, tinfoil paper, iron foil, nickel foil, zinc paper tinsel etc. certainly, and perhaps other conductive coefficient material of being higher than the silicon rubber conductive coefficient also can be used as surrounding layer.
In the present embodiment, utilize the high thermal conductivity coefficient of aluminium foil, the conductive coefficient of fine aluminium in the time of 0～100 ℃ is about 240w/ (m.K), improves the overall thermal conductivity of heating line.The linear diameter that wherein generates heat is 3mm, and the thickness of heating line outer surface parcel aluminium foil is 0.1mm.Generate heat line and heating line of the present utility model of tradition is wrapped in long 1200mm (effectively coiling length is 1009mm) respectively, and internal diameter 11mm tests on the red copper light pipe of wall thickness 1mm, and the mineral wool that adds 50mm is as heat-insulation layer.
Test result is as follows: with reference to Fig. 4, when water velocity was 40g/s in copper tube, density of heat flow rate was 17277w/m
2Two kinds of heating line surfaces externally and internally temperature change in time and change.When just beginning, the ectonexine temperature all increases in time and raises, and the increase amplitude weakens in time, almost remains unchanged at last.The internal layer temperature of tradition heating line is minimum relatively, be up to 31.9 ℃, and exospheric temperature raises comparatively fast, is up to 100.1 ℃; And heating line internal layer temperature of the present utility model raises, and be up to 37.7 ℃, and outer maximum temperature is reduced to 42.5 ℃.
And, when density of heat flow rate is 17277w/m
2The time, the internal-external temperature difference of tradition heating line can reach 68.2 ℃, and the utility model heating line internal-external temperature difference has only 4.8 ℃.The surfaces externally and internally temperature difference reduces significantly, descends 63.4 ℃.And under identical density of heat flow rate, the peak temperature on the utility model heating line has descended 57.6 ℃ than tradition heating line peak temperature.Promptly under identical density of heat flow rate, reduced the peak temperature on the heating line, increased the service life, simultaneously more little with circumstance of temperature difference, thermal loss is few more, so reduced the thermal loss in the heating line outside, saves heating line power consumption.
With reference to Fig. 5, along with the increase of density of heat flow rate, the interior outside temperature difference of tradition heating line increases very fast, and behind the parcel aluminium foil, difference variation reduces significantly, drop to 2.8 ℃ from 48.1 ℃, and the variation of the temperature difference almost is linear increase with person's density of heat flow rate.With reference to Fig. 6, when water velocity was 40g/s, under different density of heat flow rate, when just beginning, exospheric temperature all increased in time and raises, but reaches the required asynchronism(-nization) of steady heat transfer state, when density of heat flow rate all is 17277w/m
2The time, the exospheric temperature of tradition heating line raises very fast, and it is 582s that temperature reaches the constant time; Behind the parcel aluminium foil, the internal layer temperature raises, and exospheric temperature to be increased to the constant required time be 212s, shortened 370s.
With reference to Fig. 7, tradition heating line slope is greater than the New Development hot line that adds the aluminium foil parcel, and when both hull-skin temperatures all reach 109.5 ℃, and the result shows that density of heat flow rate that the New Development hot line is born is generate heat 3.83 times of line of tradition.Be that hull-skin temperature is identical down, the latter's density of heat flow rate will be higher than the former.This is that heat conductivility improves owing to total thermal resistance after having added aluminium foil reduces.In application, the density of heat flow rate that unit are can be carried increases, and when needed heat one timing, will reduce heat transfer area, promptly saves tubing, in the present embodiment, if tradition heating line will carry 66227W/m
2Under the density of heat flow rate, then need copper pipe is risen to 3.83m, also need simultaneously the heating line is increased by 3.83 times.
Hence one can see that: when temperature reached 109.5 ℃, tradition heating line density of heat flow rate was 17277W/m
2, New Development hot line density of heat flow rate is 66227W/m
2, effectively having promoted the operating power in the unit are, improvement value has reached more than 283.3%, thereby can reduce the volume and the heater wire consumption of heater.Principle can both effectively reduce the temperature of insulating barrier outer surface also together under other temperature conditions.
Below the utility model is described in detail, the above only is the preferred embodiment of the utility model, when not limiting the utility model practical range, be allly to do impartial change and modify, all should still belong in the utility model covering scope according to the application's scope.
Claims (3)
1. heating line that can carry high heat flux, its structure comprises resistance wire and insulating barrier, insulating barrier is wrapped in the resistance wire outside, and it is characterized in that: described heating line also comprises the surrounding layer of being made by the high thermal conductivity coefficient material, and surrounding layer tightly is wrapped in the insulating barrier outside; Described surrounding layer be under uniform temp conductive coefficient greater than the material of the conductive coefficient of insulating barrier.
2. the heating line that can carry high heat flux according to claim 1 is characterized in that: described surrounding layer is a metal forming.
3. the heating line that can carry high heat flux according to claim 1 and 2 is characterized in that: described surrounding layer is goldleaf, silver foil, aluminium foil, Copper Foil, tinfoil paper, iron foil, nickel foil or zinc paper tinsel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205907116U CN201893950U (en) | 2010-11-01 | 2010-11-01 | Heating wire capable of bearing high heat-flow density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205907116U CN201893950U (en) | 2010-11-01 | 2010-11-01 | Heating wire capable of bearing high heat-flow density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893950U true CN201893950U (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205907116U Expired - Fee Related CN201893950U (en) | 2010-11-01 | 2010-11-01 | Heating wire capable of bearing high heat-flow density |
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| CN (1) | CN201893950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998708A (en) * | 2010-11-01 | 2011-03-30 | 广东欧科空调制冷有限公司 | Heating wire capable of bearing high heat-flow density |
-
2010
- 2010-11-01 CN CN2010205907116U patent/CN201893950U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998708A (en) * | 2010-11-01 | 2011-03-30 | 广东欧科空调制冷有限公司 | Heating wire capable of bearing high heat-flow density |
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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: 20110706 Termination date: 20131101 |