CN202444642U

CN202444642U - Improved self-regulating heating cable

Info

Publication number: CN202444642U
Application number: CN2011205398286U
Authority: CN
Inventors: 袁建波
Original assignee: ZHEJIANG HUAYUAN ELECTRIC HEAT CO Ltd
Current assignee: ZHEJIANG DAMING NEW MATERIAL CO., LTD.
Priority date: 2011-12-21
Filing date: 2011-12-21
Publication date: 2012-09-19
Anticipated expiration: 2021-12-21

Abstract

The utility model relates to an improved self-regulating heating cable which is characterized by comprising a power line and a self-regulating heating cable with its one end electrically connected with the power line. The beneficial effects of the self-regulating heating cable are that, heat is provided by the self-regulating heating cable in a manner that, PTC materials are used as heating materials for the self-regulating heating cable, and if the temperature rises, the resistance and the power of the self-regulating heating cable are reduced to generate less heat, otherwise, if the temperature falls, the resistance and the power of the self-regulating heating cable are increased to generate more heat, thereby keeping the temperature constant. Therefore, automatic temperature control is realized without any additional temperature control device, providing a simplified structure, and the heating temperature can be regulated by controlling composition proportion of the PCT materials to satisfy various temperature requirements.

Description

The modified model self-limiting heating cable

Technical field

The utility model relates to a kind of modified model self-limiting heating cable.

Background technology

Under bad border of low temperature, parts such as compressor, pipeline usually can occur starting problems such as difficult, that fluid freezes in the air-conditioning, thereby influence the air-conditioning operate as normal.Therefore, these positions need be equipped with auxiliary companion's thermal part, thereby play antifreeze, the anti-effect of coagulating, being incubated.Traditional electric tracing mode adopts permanent power companion heat mostly, adopts the heating of alloy heater strip, and its power output is constant.Because the heating alloy heating power is constant, exist power consumption big, heat up comparatively slowly and be easy to generate temperature and cross problems such as height, influence the equipment operate as normal, even have an accident.If increase the temperature control equipment of control heater strip temperature, then make structure complicated, bring inconvenience to installation, and increased cost.

Summary of the invention

The utility model is to the problem of above-mentioned existence; A kind of modified model self-limiting heating cable is provided; This self-limiting heating cable can be realized limitting temp effect automatically, avoids the too high phenomenon of appearance temperature, and the temperature rise time is short, heating is even, power consumption is few, simple in structure, it is easy to install.

The utility model is realized through following technical proposal: the modified model self-limiting heating cable is characterized in that the self-temperature-limiting heating strip that comprises that power line, an end are electrically connected with power line.

Described self-temperature-limiting heating strip comprises a PTC core band; Be embedded in the parallel conductor of two in PTC core band bundle and from the interior peripheral insulation inner sheath of PTC core band, metallic shield cover, the insulation oversheath of being coated on successively outward, the head end end of said two conductors and metallic shield cover respectively with power line in zero line, live wire, ground wire be electrically connected.Compare with existing auxiliary companion's thermal part, this self-limiting heating cable has temperature automatically controlled function, need not the outer temperature regulating device of plus, and programming rate is fast, heating is even, simple in structure, easy for installation and power consumption is lower.Self-temperature-limiting heating strip produces heat by flat core band through the parallel embedded conductor conduction of two bundles.Two bundle parallel conductors adopt copper wire to process.The insulation inner sheath adopts polyolefin to process with the insulation oversheath.Screen adopts the tinned copper wire braiding to process.Terminal connection box and middle part terminal box adopt polypropylene and color masterbatch to process.Power line is three core power lines.

The peripheral sheathed heat-shrink tube respectively in the joint that said two conductors and metallic shield cover are electrically connected with power line.

The peripheral sheathed middle part sleeve in the junction of said self-temperature-limiting heating strip and power line, said heat-shrink tube places the inner chamber of middle part sleeve.

The head end end of said two conductors and metallic shield cover respectively with power line in zero line, live wire, ground wire riveted joint.

The tail end of said self-temperature-limiting heating strip connects a terminal connection box.

The insulation inner sheath of said self-temperature-limiting heating strip tail end forms the extension section at the tail end of metallic shield cover and insulation oversheath; Said extension section is provided with injecting hole; And be provided with the oblique angle breach in the end of extension section; Said terminal connection box is a moulding, and is connected with oblique angle breach injection moulding with described injecting hole.

The beneficial effect that the utlity model has: through self-temperature-limiting heating strip heat is provided, because the self-temperature-limiting heating strip exothermic material is a ptc material, when temperature raise, resistance reduced, and power reduces, and the caloric value of self-temperature-limiting heating strip is reduced; Otherwise when temperature reduced, self-temperature-limiting heating strip resistance increased, and power raises; The caloric value of self-temperature-limiting heating strip is increased, thereby elevate the temperature, so just can keep temperature constant; Realize temperature automatically controlledly, need not to increase temperature control equipment, make designs simplification; And heating temp can be adjusted through the ptc material composition proportion, thereby satisfies all temps demand.Self-temperature-limiting heating strip is because own characteristic, makes the power saving of this self-limiting heating cable, and energy consumption reduces.Self-temperature-limiting heating strip is when cold conditions, and resistance is little, so starting power is big, and temperature rise speed is fast and heating is even.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the sectional structure sketch map of self-temperature-limiting heating strip in the utility model.

Fig. 3 is the internal structure sketch map that is positioned at terminal box place, middle part in the utility model.

Fig. 4 is the structural representation that is positioned at the inside at terminal connection box place in the utility model.

Among the figure, 1: three core power line; 2: the middle part sleeve; 3: self-temperature-limiting heating strip; 4: the terminal connection box; 5: conductor; 6: the core band; 7: the insulation inner sheath; 8: the metallic shield cover; 9: the insulation oversheath; 10: heat-shrink tube; 11: zero line; 12: live wire; 13: the power line oversheath; 14: ground wire; 71: the extension section; 72: injecting hole; 73: the oblique angle breach.

Embodiment

Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.

Embodiment: as shown in Figure 1, the modified model self-limiting heating cable comprises three core power lines 1, middle part sleeve 2, self-temperature-limiting heating strip 3 and terminal connection box 4.

As shown in Figure 2, self-temperature-limiting heating strip 3 comprises two bundle parallel conductors 5, PTC core band 6, insulation inner sheath 7, metallic shield cover 8 and insulation oversheath 9.Two bundle conductors 5 are set in parallel in the core band 6, and conductor 5 materials are copper, and core band 6 materials are the PTC exothermic material and are flat.Insulation inner sheath 7, insulation inner sheath 7 materials are polyolefin, play the insulation protection effect.Insulation inner sheath 7 outer setting housings 8, housing 8 is processed by the tinned copper wire braiding, has ground connection and enhance protection effect.Insulation oversheath 9 materials are polyolefin, play the insulation protection effect.

As shown in Figure 3, the zero line 11 of three core power lines 1, live wire 12 and ground wire 14 respectively with self-temperature-limiting heating strip 3 in 8 riveted joints of two bundle conductors 5 and housings, riveted joint place is with heat-shrink tube 10 respectively, outside injection moulding middle part adapter sleeve 2.The injected plastics material of middle part adapter sleeve 2 is polypropylene and color masterbatch.

As shown in Figure 4; Self-temperature-limiting heating strip 3 tail ends divest insulation oversheath 9 and housing 8; Exposed insulation inner sheath 7 forms extension section 71, and the middle part of extension section 71 gets out an injecting hole 72, and an end angle of extension section 71 is done 45 ° of angles and handled formation oblique angle breach 73; At the outside injection moulding terminal connection of self-temperature-limiting heating strip 3 tail ends box 4, injected plastics material is polypropylene and color masterbatch.

This modified model self-limiting heating cable can be directly installed on to be needed on the heat-preserving anti-freezing parts in the air-conditioning; Available nylon cable tie is fixed after twining parts; Can also between pipe outer wall and self-limiting heating cable, paste the layer of aluminum adhesive tape for nonmetal pipeline; Be used for increasing the transmission of heat by contact area, power line directly connects power supply.Its course of work is, behind the starting of air conditioner, and power connection; Self-temperature-limiting heating strip begins to provide heat, because starting power is big, temperature rise is rapid; Along with temperature raises gradually, power reduces gradually, keeps stable subsequently; So just can make temperature maintenance on a rational numerical, thereby guarantee the air-conditioning operate as normal.

It is described that the specific embodiments of the utility model is not limited in the foregoing description, and according to the description of specification, those skilled in the art just can implement corresponding to any formed scheme of claim.

Claims

1. the modified model self-limiting heating cable is characterized in that the self-temperature-limiting heating strip (3) that comprises that power line (1), an end are electrically connected with power line (1).

2. modified model self-limiting heating cable according to claim 1; It is characterized in that described self-temperature-limiting heating strip (3) comprises a PTC core band (6); Be embedded in the parallel conductor (5) of two in the PTC core band (6) bundle and from the interior peripheral insulation inner sheath (7) of PTC core band (6), metallic shield cover (8), the insulation oversheath (9) of being coated on successively outward, the head end end of said two conductors (5) and metallic shield cover (8) respectively with power line (1) in zero line, live wire, ground wire be electrically connected.

3. modified model self-limiting heating cable according to claim 2 is characterized in that the peripheral sheathed heat-shrink tube (10) respectively in joint that said two conductors (5) and metallic shield cover (8) are electrically connected with power line (1).

4. modified model self-limiting heating cable according to claim 3; It is characterized in that said self-temperature-limiting heating strip (3) and the peripheral sheathed middle part sleeve (2) in the junction of power line (1), said heat-shrink tube (10) places the inner chamber of middle part sleeve (2).

5. modified model self-limiting heating cable according to claim 3, the head end end that it is characterized in that said two conductors (5) and metallic shield cover (8) respectively with power line (1) in zero line, live wire, ground wire riveted joint.

6. modified model self-limiting heating cable according to claim 2 is characterized in that the tail end of said self-temperature-limiting heating strip (3) connects a terminal connection box (4).

7. modified model self-limiting heating cable according to claim 6; The insulation inner sheath (7) that it is characterized in that said self-temperature-limiting heating strip (3) tail end forms extension section (71) at the tail end of metallic shield cover (8) and insulation oversheath (9); Said extension section (71) is provided with injecting hole (72); And be provided with oblique angle breach (73) in the end of extension section (71); Said terminal connection box (4) is a moulding, and injection moulding is connected with oblique angle breach (73) with described injecting hole (72).