CN1301039C - Fluroplastic alloy heating cable - Google Patents
Fluroplastic alloy heating cable Download PDFInfo
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- CN1301039C CN1301039C CNB021363129A CN02136312A CN1301039C CN 1301039 C CN1301039 C CN 1301039C CN B021363129 A CNB021363129 A CN B021363129A CN 02136312 A CN02136312 A CN 02136312A CN 1301039 C CN1301039 C CN 1301039C
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- insulating sleeve
- fluroplastic
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Abstract
The present invention relates to a fluoroplastic alloy heating cable. The present invention at least comprises a heating wire, an insulating sleeve and a shielding layer, wherein the insulating sleeve is coated on the heating wire, and the shielding layer is sheathed on the insulating sleeve. The present invention is characterized in that the heating wire is composed of a metal conductor, and the metal conductor is connected with a power cord; the insulating sleeve is composed of an internal insulating sleeve and external insulating sleeve, the internal insulating sleeve is coated on the heating wire, and the external insulating sleeve is coated on the shielding layer; the internal and the external insulating sleeves are made of fluoroplastics, and the heating wire adopts a constantan metal conductor or a manganin metal conductor; the heating wire also comprises non-heating conductors which are fixed to both ends of the heating wire, one end of each non-heating conductor is connected with the heating wire through a welding spot, and the other end of each non-heating conductor is connected with the power cord. The fluoroplastic alloy heating cable of the present invention can thoroughly exert the superiority of heating at low temperature, good heat inertia and easy control, the formfitting heating is formed, the present invention can be used in places with high precision control requirement for heating control and warming control, and the present invention provides effective conditions for long-distance large-area heating.
Description
Technical field
The present invention relates to a kind of heater element, relate in particular to and a kind ofly heat used Fluroplastic alloy heating cable applicable to all trades and professions.
Background technology
In the prior art heater, the employing immerging metal tube heater is more, general wires such as immerging metal tube heater employing siderochrome aluminium high resistance are done heater element, and do the insulation material with magnesia powder, and use iron, copper, stainless steel, Titaniums etc. are made outer tube, therefore immerging metal tube heater is a kind of rigid heater element, it has higher heating-up temperature, and typical temperature can arrive 800 ℃～1000 ℃, so, immerging metal tube heater has the advantages that the heat advantage is strong and the low-temperature heat advantage is weak, and (calorific intensity can reach 1～3KW/M), so the unit volume heating power is big, and it is less that volume can be done to have higher calorific intensity.
Though immerging metal tube heater has the high characteristics of calorific intensity,, the shortcoming of Cun Zaiing is in actual use:
1. belong to rigid heater element owing to this metal of prior art heating tube, not only its min. turning radius is big, and metal processing is difficult, is not suitable for the long-distance pipe heating;
Since this metal of prior art heating tube owing to be subjected to heating wire poling and magnesia powder to fill out the influence of pipe, its length is difficult to do length, and is just very difficult greater than 4 meters length, therefore is not suitable for the large tracts of land heating;
3. owing to the structural limitations of this metal of prior art heating tube, heating tube internal heat generation silk is big with the temperature difference of the outer heating object of pipe, and the heating wire heating-up temperature can reach 800 ℃～1000 ℃, and ≯ 200 ℃ low-temperature heat occasion, it is big to add thermal inertia, so the temperature control characteristic is poor;
Since the heating wire of this metal of prior art heating tube and magnesia powder at poling, fill out pipe, shaping adds man-hour, be subjected to the influence of the manual processing factors of staff, quality is not easy to stablize, temperature conduction in pipe is difficult for evenly, make it to cause the puncture of heating tube, and being not suitable for, so poor safety performance in inflammable and explosive occasion work;
5. because this metal of prior art heating tube adopts metal tube to do shell, and not acidproof alkali lye of metal material and chemical solvent corrosion, even adopt the titanium heating tube, corrosion-resistant also have a limitation, is subjected to the inhomogeneous and easy puncture of temperature conduction, thus useful life weak point.
In order to overcome the defective that above-mentioned prior art exists, number of patent application 95119695.2 and patent No. 95239376.X disclose a kind of ribbon heater and a kind of overlength electric heating cable.
See also Fig. 1 to shown in Figure 4, this is that number of patent application 95119695.2 is entitled as the structural representation and the electrical schematic diagram of " alloy PTC parallel type electric heating strip ".Described parallel type electric heating strip is made up of the transmission pressure 1 that is arranged parallel to each other, transmission pressure insulating barrier 2, casing play 3, PTC alloy heat generating line 4, solder joint 5, glass layer 6, insulating barrier 7, wire sheathing 8 and anticorrosive coat 9 etc., its principal character is, PTC alloy heat generating line 4 spiral wounds alternately circulate on the partial cut-out of the alternate location successively of reverse certain distance along length and transmission pressure 1 welding conducting by casing play 3 and transmission pressure insulating barrier 2 between casing play 3 and glass layer 6.From Fig. 2 and Fig. 4 as seen, heating line 4 is to be welded on the transmission pressure 1 by one section one section ground to form the ribbon heater, therefore makes very trouble.
See also shown in Figure 5ly, this is that patent No. 95239376.X is entitled as the structural representation of " 380 volts of overlength electric heating cables of two-wire ".Described overlength electric heating cable comprises, two insulation heart yearns 1, insulating sleeve 2, outer insulation jacket 4 and wire net 5 in being with successively from inside to outside on this insulation heart yearn 1, circumferentially be wound with heating wire 3 at interior insulating sleeve 2, insulating sleeve compartment in these heating wire 3 segmentations are passed on insulating sleeve 2 and the insulation heart yearn 1 alternately is welded on the two insulation heart yearns 1, and two insulation heart yearns 1 join with two live wires of three phase mains respectively.This shows, " overlength electric heating cable " and above-mentioned " parallel type electric heating strip " structural similarity, heating wire 3 also are that one section one section ground is welded on the two insulation heart yearns 1 that join with power line, in theory, any length that above-mentioned electric heating cable can be made, but manufacture difficulty is still very big.
Summary of the invention
The object of the present invention is to provide a kind of Fluroplastic alloy heating cable, it can make heater wire do the length of km level, and easy to make, it is used to be fit to all trades and professions.
The object of the present invention is achieved like this:
A kind of Fluroplastic alloy heating cable, this heat generating wire cable comprises at least: the heating line, be coated on the outer insulating sleeve of heating line, be set in the outer screen of insulating sleeve; Be characterized in:
Described heating line is made up of plain conductor, comprise heating-wire and be fixedly installed on the not heating-wire at heating-wire two ends, this not an end of heating-wire be connected with heating-wire by pad, the other end is connected with power line; Heating-wire is the high-resistance alloy heating-wire, and heating-wire is not the metallic copper lead;
Described insulating sleeve is formed by being coated on the outer interior insulating sleeve of heating line and being coated on the outer outer insulation jacket of screen; Outer insulation jacket is made by fluoroplastics in described.
In above-mentioned Fluroplastic alloy heating cable, wherein, the heating-wire in the described heating line adopts the constantan wire plain conductor.
In above-mentioned Fluroplastic alloy heating cable, wherein, the heating-wire in the described heating line adopts the manganese-copper filament plain conductor.
In above-mentioned Fluroplastic alloy heating cable, wherein, described fluoroplastics adopt one of following material: polytetrafluoroethylene, perfluoroethylene third are rare.
In above-mentioned Fluroplastic alloy heating cable, wherein, described screen is metal screen layer by the tinned copper wire braiding.
In above-mentioned Fluroplastic alloy heating cable, wherein, described screen is metal screen layer by the silver-gilt copper wire braiding.
In above-mentioned Fluroplastic alloy heating cable, wherein, described heat generating wire cable comprises, three heating lines, be coated on the outer interior insulating sleeve of line that respectively generates heat respectively, three heating lines and interior insulating sleeve thereof are wrapped up in the screen that is combined in wherein, be arranged on the outer outer insulation jacket of screen.
In above-mentioned Fluroplastic alloy heating cable, wherein, described heat generating wire cable comprises, three heating lines, be coated on respectively generate heat line outer interior insulating sleeve and screen respectively, three generate heat lines and interior insulating sleeve and screen thereof are wrapped up in the outer insulation jacket that is combined in wherein.
In above-mentioned Fluroplastic alloy heating cable, wherein, described heat generating wire cable comprises, three heating lines, be coated on respectively generate heat line outer interior insulating sleeve and screen respectively, three generate heat lines and interior insulating sleeve and internal shield thereof are wrapped up in the outer shielding layer that is combined in wherein, be arranged on the outer outer insulation jacket of outer shielding layer.
Fluroplastic alloy heating cable of the present invention owing to adopted technique scheme, makes it compared with prior art, has following tangible advantage and good effect:
1. Fluroplastic alloy heating cable of the present invention is owing to adopt the precious metal alloys of high resistance to do heating conductor, the fluoroplastics of fire resistant anticorrosive are made dielectric, therefore zinc-plated or silver-plated copper wire woven shield can be given full play to the advantage of the low-temperature heat of Fluroplastic alloy heating cable in the occasion of electric heating temperature ≯ 200 ℃;
2. but Fluroplastic alloy heating cable of the present invention is owing to make full use of the heat generation characteristic and the prehensile characteristics of electric wire, can conveniently form heating next to the shin, and can accomplish the length of several kms, making it provides effective condition for long apart from the large tracts of land heating, is outstanding soft heating element therefore;
3. Fluroplastic alloy heating cable of the present invention is because the heat generating wire cable good heat dissipation effect, and temperature is even, and has less thermal inertia and good heating control characteristic, therefore can be applied in the place that control precision has relatively high expectations and add gentle warming control;
4. Fluroplastic alloy heating cable of the present invention is owing to have nonflammable fail safe, thereby can be applicable to that the explosive liquid of combustion such as various oil plants, paint heat and are incubated.
Description of drawings
By the description of following some embodiment to Fluroplastic alloy heating cable of the present invention, can further understand purpose of the present invention, specific structural features and advantage in conjunction with its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is the structural representation of prior art parallel single-phase formula ribbon heater;
Fig. 2 is the electrical schematic diagram of Fig. 1 parallel single-phase formula ribbon heater;
Fig. 3 is the structural representation of prior art three-phase parallel type ribbon heater;
Fig. 4 is the electrical schematic diagram of Fig. 3 three-phase parallel type ribbon heater;
Fig. 5 is the structural representation of 380 volts of overlength electric heating cables of prior art two-wire;
Fig. 6 (a) is Fluroplastic alloy heating cable first embodiment of the present invention (b), forms the structural representation of the heart yearn of single-phase or three-phase cable;
Fig. 7 (a) is Fluroplastic alloy heating cable first embodiment of the present invention (b), and single heart yearn adds screen and the fluoroplastic insulation sheath forms the structural representation that basic monofilament is single-phase heating electric wire;
Fig. 8 (a) is Fluroplastic alloy heating cable second embodiment of the present invention (b), and three heart yearns add the structural representation that screen and fluoroplastic insulation jacket-shaped are shaped as the three-phase heating cable;
Fig. 9 (a) is Fluroplastic alloy heating cable the 3rd embodiment of the present invention (b), adds the structural representation that the fluoroplastic insulation jacket-shaped becomes the three-phase heating cable again after three heart yearns add screen outward respectively;
Figure 10, Figure 11 are Fluroplastic alloy heating cable the 4th embodiment of the present invention, and three heart yearns add respectively outward and add the structural representation that screen and fluoroplastic insulation sheath form the three-phase heating cable behind the screen again;
Figure 12 (a) is the structural representation that is formed in the heart yearn of the single-phase or three-phase heat generating wire cable that uses in the liquid in the Fluroplastic alloy heating cable of the present invention (b).
Embodiment
See also Fig. 6, Fig. 7 and shown in Figure 12, Fig. 6, Fig. 7 are the structural representations of Fluroplastic alloy heating cable first embodiment of the present invention.In the present embodiment, described heating line comprises, heating line 10 coats an insulating sleeve 20 outside heating line 10, and the screens 30 that are set in outside the insulating sleeve 20 are formed.Wherein, unlike the prior art be:
Described heating line 10 is made up of plain conductor 11, and is connected with power line; Plain conductor 11 as heating conductor should adopt the material with resistance value good stability, because constantan wire plain conductor or manganese-copper filament plain conductor not only have the resistance value of good stability, and have good oxidization resistance and a good solderability, therefore machining property is good, for this reason, what adopt as the plain conductor 11 of heating conductor in the present invention, is constantan wire plain conductor or manganese-copper filament plain conductor;
When Fluroplastic alloy heating cable of the present invention uses in liquid, for improving heating efficiency, strengthen every meter calorific intensity, can be divided into heating section and the not design of the section of heating, in the present invention, the method that adopts is, heating line 10 by heating-wire 11 and be arranged on heating-wire 11 two ends not heating-wire 12 form, this is the zinc-plated or silver-plated copper lead of heating-wire 12 employings not, an end of heating-wire 12 is not connected with heating-wire 11 by pad 13, the other end is connected with power line, promptly forms the section of not generating heat by heating-wire 12 not, forms the heating section by heating-wire 11; When reality was used, the usefulness not section of heating played the line effect that the heating section in the connection liquid arrives power supply, the section of heating all is immersed in the liquid, thereby improves calorific intensity, makes heating efficiency reach 100%.When making, not heating-wire 12 promptly not the section of heating adopt zinc-plated or the silver-plated copper lead carries out welding manner with heating section constantan wire or manganese-copper filament and is connected, as, available high-melting-point terne metal directly welds with electric soldering iron, also available butt-welding machine direct spot welding, carrying out cable processing, make it not only to link together, and become smooth one then;
Described insulating sleeve 20 comprises, is coated on interior insulating sleeve 21 and outer insulation jacket 22 (see figure 7)s that are coated on outside the screen 30 outside the heating line 10; In the present invention, interior outer insulation jacket 21 and 22 is made by fluoroplastics, and is rare as polytetrafluoroethylene or perfluoroethylene third; Polytetrafluoroethylene can normally use in-100 ℃～250 ℃ wide temperature ranges, and perfluoroethylene-propylene can normally use in-100 ℃～200 ℃ wide temperature wide regions, and both all have the processing characteristics of good electric wire; This shows that fluoroplastics can reach operate as normal in-100 ℃～200 ℃ the temperature range at width, and oil resistant, acidproof, alkaline-resisting, the comprehensive corrosion resistance of anti-various chemical reagent is the ideal materials as insulating barrier and insulating sleeve;
Described screen 30 is metal screen layer by the tinned copper wire braiding, also can be metal screen layer by the silver-gilt copper wire braiding; Metal screen layer can prevent electromagnetic pollution, can be used as equal thermosphere and heat-conducting layer, and can effectively prevent short circuit and earth leakage protective.
Please in conjunction with Figure 12 and Fig. 7 referring to shown in Figure 8, Fig. 8 is the structural representation of Fluroplastic alloy heating cable second embodiment of the present invention.In the present embodiment, described heat generating wire cable comprises, three heating lines 10, insulating sleeve 21 in outside three heating lines 10, being provided with respectively, and the heating of three behind the insulating sleeve 21 line 10 outer screens 30 that are provided with in will coating, this screen 30 is wrapped up in three heatings lines 10 and interior insulating sleeves 21 thereof and is combined in wherein, and an outer insulation jacket 22 is set outside screen 30.The characteristics of the heat generating wire cable of present embodiment are, and are smooth and soft, and it is fit to make various heaters, with the heating line of present embodiment balancedly cable around the home on heater support.
Please in conjunction with Figure 12 and Fig. 7 referring to shown in Figure 9, Fig. 9 is the structural representation of Fluroplastic alloy heating cable the 3rd embodiment of the present invention.In the present embodiment, described heat generating wire cable comprises, three heating lines 10, and insulating sleeve 21 and screen 30 in being provided with respectively outside three heating lines 10 are provided with outer insulation jacket 22 outside three of insulating sleeve 21 and screen 30 heating lines 10 in coating.The characteristics of the heat generating wire cable of present embodiment are, and are smooth, and it is suitable for large tracts of land and heats warmingly, as is used to be arranged under the road surfaces such as airport, highway, in order to snow melting ice, to keep the unimpeded and safety of airport, highway.
Please in conjunction with Figure 12 and Fig. 7 referring to Figure 10 and shown in Figure 11, Figure 10 and Figure 11 are the structural representations of Fluroplastic alloy heating cable the 4th embodiment of the present invention.In the present embodiment, described heat generating wire cable comprises, three heating lines 10, insulating sleeve 21 and screen 30 in outside three heating lines 10, being provided with respectively, in coating, outside three of insulating sleeve 21 and screen 30 heating lines 10 outer shielding layer 32 is set, and outside outer shielding layer 32, outer insulation jacket 22 is set.The characteristics of the heat generating wire cable of present embodiment are, and are smooth and soft, and good heat dissipation effect, and temperature is even, and suitable making is used for liquid is added gentle warming heater.
From the above, the present invention, the characteristics of Fluroplastic alloy heating cable are:
1. but Fluroplastic alloy heating cable of the present invention has prehensile, can be wrapped in easily various flat boards, On the object of pipeline and different form, form heating next to the skin, and can accomplish the length of several kms, can shape Therefore the large-area heating of the distance of growing up is outstanding soft heating element;
2. what every meter of Fluroplastic alloy heating cable of the present invention calorific intensity can be done is very wide, can reach ≯ 100 watts, for good condition has been created in the large tracts of land low-temperature heat;
3. the maximum operating temperature of Fluroplastic alloy heating cable of the present invention ≯ 200 ℃, the heating good evenness, Can not produce high temperature; And owing to have short circuit and a creepage protection function, so in the heating of inflammable and explosive substances With the insulation in be the heating element heater of a safety; In addition, because the present invention is nonflammable, can be anticorrosive, because of This is the heating element heater of a long service life;
4. when Fluroplastic alloy heating cable of the present invention uses in liquid, for improving heating efficiency, strengthen Every meter calorific intensity can be divided into generate heat section and the not design of the section of heating, and using not, the section of heating rises in the connection liquid The heating section is to the line effect of power supply, and the heating section all is immersed in the liquid, thereby improves calorific intensity, makes Heating efficiency reaches 100%.
In sum, Fluroplastic alloy heating cable of the present invention take full advantage of electric wire heat generation characteristic and can The prehensile characteristics adopt the precious metal alloys of high resistance to do heating conductor, and with the fluorine of fire resistant anticorrosive Plastics are made dielectric, also with zinc-plated or silver-plated proof copper-wire braided screen layer, by the side of processing electric wire Method and produce single-phase or the three-phase Fluroplastic alloy heating cable both can be widely used in immerging metal tube heater and use The field, and can be used in the field that immerging metal tube heater can not relate to, therefore, very practical.
Claims (9)
1. Fluroplastic alloy heating cable, this heat generating wire cable comprises at least: heating line (10), be coated on the outer insulating sleeve (20) of heating line (10), be set in the outer screen (30) of insulating sleeve (20); It is characterized in that:
Described heating line (10) is made up of plain conductor, comprise heating-wire (11) and be fixedly installed on the not heating-wire (12) at heating-wire (11) two ends, this not an end of heating-wire (12) be connected with heating-wire (11) by pad (13), the other end is connected with power line; Heating-wire (11) is the high-resistance alloy heating-wire, and heating-wire (12) is not the metallic copper lead;
Described insulating sleeve (20) is formed by being coated on the outer interior insulating sleeve (21) of heating line (10) and being coated on the outer outer insulation jacket (22) of screen (30); Outer insulation jacket (21) and (22) are made by fluoroplastics in described.
2. Fluroplastic alloy heating cable as claimed in claim 1 is characterized in that: the heating-wire (11) in the described heating line (10) adopts the constantan wire plain conductor.
3. Fluroplastic alloy heating cable as claimed in claim 1 is characterized in that: the heating-wire (11) in the described heating line (10) adopts the manganese-copper filament plain conductor.
4. Fluroplastic alloy heating cable as claimed in claim 1 is characterized in that: described fluoroplastics adopt one of following material: polytetrafluoroethylene, perfluoroethylene third are rare.
5. Fluroplastic alloy heating cable as claimed in claim 1 is characterized in that: described screen (30) is metal screen layer by the tinned copper wire braiding.
6. Fluroplastic alloy heating cable as claimed in claim 1 is characterized in that: described screen (30) is metal screen layer by the silver-gilt copper wire braiding.
7. Fluroplastic alloy heating cable as claimed in claim 1, it is characterized in that: described heat generating wire cable comprises, three heating lines (10), be coated on the outer interior insulating sleeve (21) of line (10) that respectively generates heat respectively, three heating lines (10) and interior insulating sleeve (21) thereof are wrapped up in the screen (30) that is combined in wherein, be arranged on the outer outer insulation jacket (22) of screen (30).
8. Fluroplastic alloy heating cable as claimed in claim 1, it is characterized in that: described heat generating wire cable comprises, three heating lines (10), be coated on respectively generate heat line (10) outer interior insulating sleeve (21) and screen (30) respectively, three generate heat lines (10) and interior insulating sleeve (21) and screen (30) thereof are wrapped up in the outer insulation jacket (22) that is combined in wherein.
9. Fluroplastic alloy heating cable as claimed in claim 1, it is characterized in that: described heat generating wire cable comprises, three heating lines (10), be coated on respectively generate heat line (10) outer interior insulating sleeve (21) and screen (30) respectively, three heating lines (10) and interior insulating sleeves (21) thereof and internal shield (31) are wrapped up in the outer shielding layer (32) that is combined in wherein, be arranged on outer shielding layer (32) outer insulation jacket (22) outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363129A CN1301039C (en) | 2002-07-31 | 2002-07-31 | Fluroplastic alloy heating cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363129A CN1301039C (en) | 2002-07-31 | 2002-07-31 | Fluroplastic alloy heating cable |
Publications (2)
| Publication Number | Publication Date |
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| CN1472989A CN1472989A (en) | 2004-02-04 |
| CN1301039C true CN1301039C (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021363129A Expired - Fee Related CN1301039C (en) | 2002-07-31 | 2002-07-31 | Fluroplastic alloy heating cable |
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| CN (1) | CN1301039C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860994A (en) * | 2010-04-09 | 2010-10-13 | 江阴市华能电热器材有限公司 | Perforated tube three-core electric heating tape |
| CN101959332A (en) * | 2010-04-14 | 2011-01-26 | 江阴市华能电热器材有限公司 | Single-core constantan alloy stranded wire PFA (Perfluoroethylene-Perfluoroether Copolymer) insulating jacket and PVC (Polyvinyl Chloride) reinforced jacket electric heating tape |
| CN101959333A (en) * | 2010-04-14 | 2011-01-26 | 江阴市华能电热器材有限公司 | Insulated single-core constantan alloy stranded wire PFA (soluble Polytetrafluoroethylene) jacket short-distance constant power electric heating tape |
| CN101959334A (en) * | 2010-04-19 | 2011-01-26 | 江阴市华能电热器材有限公司 | Heating cable adopting twin-core nickel-chromium alloy stranded wires, silicon rubber insulating layers and sheaths and PVC sheath |
| CN101959335A (en) * | 2010-04-19 | 2011-01-26 | 江阴市华能电热器材有限公司 | Short-distance constant watt heating cable adopting twin-core nickel-chromium alloy stranded wires and silicon rubber insulating layers and sheaths |
| CN101959336A (en) * | 2010-04-21 | 2011-01-26 | 江阴市华能电热器材有限公司 | Fluorinated ethylene propylene (FEP) insulating and jacketing short-distance constant-power electric heat tape with dual-core constantan alloy twisted wire |
| CN103152848A (en) * | 2013-03-13 | 2013-06-12 | 江苏东南电缆有限公司 | Crosslinking heating band |
| CN104672525A (en) * | 2015-03-11 | 2015-06-03 | 安徽弘博电缆集团有限公司 | Wear-resistant and corrosion-resistant cable sheath for ships, as well as preparation method of cable sheath |
| CN109556169A (en) * | 2018-12-13 | 2019-04-02 | 莫家桂 | A kind of fever heating plant of timber floor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1022213C (en) * | 1991-06-22 | 1993-09-22 | 西安交通大学 | Automatic temp. controlling heating cable |
| DE29613339U1 (en) * | 1996-08-01 | 1996-09-19 | Wilhelm Friedrich | Heating element |
| CN2476915Y (en) * | 2001-02-23 | 2002-02-13 | 贵阳车辆厂热缆销售部 | Electrothermal cable |
-
2002
- 2002-07-31 CN CNB021363129A patent/CN1301039C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1022213C (en) * | 1991-06-22 | 1993-09-22 | 西安交通大学 | Automatic temp. controlling heating cable |
| DE29613339U1 (en) * | 1996-08-01 | 1996-09-19 | Wilhelm Friedrich | Heating element |
| CN2476915Y (en) * | 2001-02-23 | 2002-02-13 | 贵阳车辆厂热缆销售部 | Electrothermal cable |
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| CN1472989A (en) | 2004-02-04 |
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