CN102612176A - PTC (positive temperature coefficient) electrical heating assembly - Google Patents
PTC (positive temperature coefficient) electrical heating assembly Download PDFInfo
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- CN102612176A CN102612176A CN2012100666032A CN201210066603A CN102612176A CN 102612176 A CN102612176 A CN 102612176A CN 2012100666032 A CN2012100666032 A CN 2012100666032A CN 201210066603 A CN201210066603 A CN 201210066603A CN 102612176 A CN102612176 A CN 102612176A
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- heating assembly
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Abstract
The invention discloses a PTC (positive temperature coefficient) electrical heating assembly, which comprises an installation projection, radiating fins and two conductive insert terminals. The two conductive insert terminals are connected to the radiating fins. The installation projection is inserted between the two conductive insert terminals and the inserted portion of the installation projection is coated with silica gel. Since the installation projection is coated with the silica gel, heat resistance of the whole electrical heating assembly is enhanced, conducting path formed between the conductive insert terminals caused by excess temperatures is avoided, and accordingly, possibility of fire is lowered and safety of the electrical heating assembly is improved.
Description
Technical field
The present invention relates to the electric equipment field, and especially, relate to a kind of positive temperature coefficient (Positive Temperature Coefficient abbreviates PTC as) electric heating assembly.
Background technology
The PTC thermistor is called for short the PTC thermistor, is the semiconductor resistor that a kind of typical case has temperature sensitivity, and when surpassing certain temperature, its resistance value is along with the rising of temperature is increasing of step evolution.Ptc heater has constant temperature heating, the flames of anger, thermal conversion rate height, receives supply voltage to influence advantage little and that the life-span is long.
The PTC thermistor can be made into multiple contour structures and different size, and common have disc, rectangle, bar shaped, annulus and a honeycomb cellular etc.Make up above-mentioned PTC heater element and hardware and can form various forms of High-Power PTC heating elements.
Ptc heater is the heater element that utilizes the design of heated at constant temperature PTC thermistor constant temperature heat generation characteristic; It has been widely used in multiple technologies fields such as computer, communication apparatus, industrial equipment and household electrical appliance; Existing idle call ptc heater generally comprises: PTC electric heating element, the electrode terminal that is connected with the PTC electric heating element and PTC pedestal.This PTC base shell often adopts the insulating material of the PPS resin materials such as (Polyphenylene Sulfide, polyphenylene sulfides) of good heat resistance as ptc heater.
China's utility model patent; Patent No. ZL200620034186.3 discloses a kind of closed type semistor heater; Comprise heater element, be used to connect electrode terminal, PTC heater element, the cavity that is used for ccontaining PTC heater element and the finned fin that power supply makes the heater element heating power; This two ends accent that holds cavity is sealed with seal, and this electrode terminal stretches out from the seal that holds cavity one or both ends accent.
It is thus clear that above-mentioned patent has the advantage of insulating properties and good airproof performance.But, the insulant between the electrode terminal on the PTC pedestal, the insulating material such as PPS resin of the normal good heat resistance that adopts are processed.And the poor-performing of anti-electric leakage of PPS resin if there is conductive liquid in its surface, can make the surface of this insulant be short-circuited owing to electric leakage; Produce pyrophoric behavio(u)r, and cause insulant generation carbonization phenomenon, because the conductance of carbonization product is high; Cause the electric field density at this place to concentrate on this carbonization part, cause the generation that repeats of discharge, around it, produce more carbide; Form the tungsten carbide/conductive path, and then cause the insulation resistance of this insulant sharply to descend, after insulation resistance descends; Possibly cause the electric current that flows through insulant to increase, be accompanied by the rising of ptc heater temperature, cause heating problem on fire.
For example, as shown in Figure 1, applied the alternating current (AC) of 220V at two electrodes, between two electrodes, just possibly produce conductive path L because of the deposition of insulant, just maybe be on fire in the position of conductive path L.
On fire easily to ptc heater in the correlation technique, the problem of poor stability does not propose effective solution at present as yet.
Summary of the invention
On fire easily to ptc heater in the correlation technique, the problem of poor stability, the present invention proposes a kind of PTC electric heating assembly, can avoid the accumulation of insulant and forms conductive path, has reduced possibility of fire, has improved the fail safe of device.
Technical scheme of the present invention is achieved in that
According to an aspect of the present invention; A kind of positive temperature coefficient (PTC) electric heating assembly is provided, has it is characterized in that, comprised jut and fin and two conduction filling-in bit terminals are installed; Wherein, Two conduction filling-in bit terminals are connected to fin, jut is installed is inserted between two conduction filling-in bit terminals, and the surface that the parts between two conductions of jut insertion filling-in bit terminal are installed scribbles silica gel.
This assembly can further comprise: the PTC pedestal, cover is connected to fin, the protruding part is installed in the PTC pedestal.
In addition, the parts of installing between two conductions of jut insertion filling-in bit terminal are tapered, and tapered part is processed by thermosetting resin, and wherein, tapered part is processed by phenolic resin or epoxy resin.
Preferably, on the surface of an end of conduction filling-in bit terminal and can be provided with insulating material between two electrodes.
In addition, this assembly may further include temperature sensor and Thermal Cutoffs, and wherein, fuse is electrically connected with a conduction filling-in bit terminal, and Thermal Cutoffs is electrically connected with another conduction filling-in bit terminal.
In addition; Jut is installed to be processed by insulating resin; And this installation jut near the surface of an end of conduction filling-in bit terminal on and be provided with insulation material layer between two electrodes, make the phase ratio creepage tracking index of PTC electric heating assembly greater than 300V and less than 800V.
And, this installation jut near the surface of an end of conduction filling-in bit terminal on and the insulating material that is provided with between two electrodes be silicones or ultraviolet curing resinoid.
And, this installation jut near the surface of an end of conduction filling-in bit terminal on and the insulating material layer thickness that is provided with between two electrodes greater than 0.03mm.
In addition; Install jut near the conduction filling-in bit terminal an end shape with two to conduct electricity the shapes that filling-in bit terminal constituted identical; And near two the conduction filling-in bit terminals; Two conduction filling-in bit terminal width are less than installing the jut width, and two conduction filling-in bit terminals are made insulating barrier with the connecting portion of PTC electrode with heat-shrink tube or insulating tape separately.
And the PTC electric heating assembly also has heat dissipating layer; On the surface of the PTC electric heating assembly that heat dissipating layer covers, at a end, between PTC electric heating assembly that is clipped in and PTC pedestal are interior near the conduction filling-in bit terminal.
The present invention applies the installation jut through adopting silica gel, can improve the thermal endurance of whole heater element, avoids temperature too high and between the conduction filling-in bit terminal, form conductive path, has reduced possibility of fire, has improved the fail safe of device.
Description of drawings
Fig. 1 is a sketch map of describing the electrode formation conductive path of ptc heater spare in the correlation technique;
Fig. 2 is the stereogram according to the PTC electric heating assembly of the embodiment of the invention;
Fig. 3 is the PTC electric heating assembly top plan view according to the embodiment of the invention;
Fig. 4 is the details enlarged drawing according to the PTC electric heating assembly of the embodiment of the invention;
Fig. 5 is according to the structure chart that the jut head portion is installed in the PTC electric heating assembly of the embodiment of the invention;
Fig. 6 is the front view of the vertical interface of PTC electric heating assembly shown in Figure 1.
Embodiment
According to embodiments of the invention, a kind of PTC electric heating assembly is provided, as shown in Figures 2 and 3; PTC electric heating assembly according to the embodiment of the invention comprises PTC pedestal 1, installation jut 2, fin 3 and two conduction filling-in bit terminals 4; Wherein, PTC pedestal 1 cover is connected to 3, two conductions of fin filling-in bit terminal 4 and is connected to fin 3; Jut 2 is installed is fixed in the PTC pedestal 1 (can be integrally formed), and installation jut 2 is inserted between two conduction filling-in bit terminals 4 with pedestal 1.
As shown in Figure 3, wherein, the surface that the part B between two conductions of jut 2 insertions filling-in bit terminal 4 are installed also scribbles silica gel, and the part B that install between two conductions of jut 2 insertions filling-in bit terminal 4 are tapered.In addition, PTC pedestal 1 is processed by phenolic resin with the part A of fin 3 sockets.Wherein, the integral body of PTC pedestal 1 can be processed by phenolic resin, also can scribble phenolic resin on the surface of PTC pedestal 1.In addition, also can select for use other material to process pedestal 1 (comprise jut 2 is installed) or pedestal 1 (comprise jut 2 is installed) is applied, for example, epoxy resin.
In addition, alternatively, PTC pedestal 1 scribbles silica gel with the surface of the part A of fin 3 sockets, and, as shown in Figure 4, conduct electricity under the situation that filling-in bit terminals 4 contact with two on the surface of PTC pedestal 1, should be coated with silica gel at this contact position of pedestal 1.Through applying silica gel, can further improve insulation property, avoid the appearance of residue, improve the fail safe of device.
In addition, according to the embodiment of the invention, the PTC electric heating assembly can further comprise temperature sensor 5 and Thermal Cutoffs 6, and wherein, fuse is electrically connected with a conduction filling-in bit terminal, and Thermal Cutoffs conducts electricity filling-in bit terminal with another and is electrically connected.If on fire, Thermal Cutoffs and transducer can move, and fire is extinguished.How actual temp fuse and transducer can work, and are that those skilled in the art know, and this paper no longer details.
Fig. 6 is the front view of the vertical interface of PTC electric heating assembly shown in Figure 1.As shown in Figure 6, at the top of pedestal 1, can be provided with temperature sensor groove 9 and Thermal Cutoffs groove 10, be used for holding respectively temperature sensor and Thermal Cutoffs.
In addition, with reference to Fig. 5, the top of jut 2 is installed overlooks tapered (triangle, top corner portion has certain radian), the side is a column, that is to say, the sidewall on its top can be perpendicular to horizontal plane.And, then being two cylinders of stack at the afterbody on this top, these two cylindrical diameters are different, are convenient in several ways this top to be installed to rod shape structure and to form jut 2 are installed.In addition, the top of installation jut 2 illustrated in fig. 5 can be processed by phenolic resin, for further improve fail safe can, scribble the silica gel resin on the surface.
In addition; Thermal Cutoffs 6 can be connected to conduction filling-in bit terminal 4 through terminal 7 with temperature sensor 5, wherein, two terminals 7 can be provided; Terminal 7 can be inserted in the insulating sleeve (not shown), and two terminals connect one to one with temperature sensor 5 through lead and Thermal Cutoffs 6.
In addition; Jut 2 is installed also can be processed by insulating resin; And this installation jut 2 near the surface of an end of conduction filling-in bit terminal 4 on and be provided with insulation material layer between two electrodes, make the phase ratio creepage tracking index (CTI) of PTC electric heating assembly greater than 300V and less than 800V.
This installation jut 2 near the surface of an end of conduction filling-in bit terminal 4 on and the insulating material that is provided with between two electrodes be silicones or ultraviolet curing resinoid.
In addition, this installation jut 2 near the surface of an end of conduction filling-in bit terminal 4 on and the insulating material layer thickness that is provided with between two electrodes greater than 0.03mm.
In addition, on the surface of an end of conduction filling-in bit terminal 4 and be provided with insulating material between two electrodes.
In addition; Alternatively; It is identical with the shape that two conduction filling-in bit terminals 4 are constituted near the shape of an end of conduction filling-in bit terminal 4 that jut 2 is installed; And less than the width that jut 2 is installed, two conduction filling-in bit terminals 4 are made insulating barrier with the connecting portion of PTC electrode with heat-shrink tube or insulating tape separately near 4, two conductions of two conduction filling-in bit terminals filling-in bit terminal, 4 width.
In addition, the PTC electric heating assembly also has heat dissipating layer; Heat dissipating layer covers on the surface of PTC electric heating assembly, at a end near the conduction filling-in bit terminal, be clipped in PTC electric heating assembly and the PTC pedestal between.
In sum, the present invention applies the installation jut through adopting silica gel, can improve the thermal endurance of whole heater element, avoids temperature too high and between the conduction filling-in bit terminal, form conductive path, has reduced possibility of fire, has improved the fail safe of device; In addition, the present invention adopts one-body molded that the good resin of anticreep characteristic of thermosetting resin phenol etc. carries out that the terminal part isolates, replacement PPS resin, and the insulant that the electrically heated terminal part of PTC is isolated adopts thermosetting resin phenol.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. positive temperature coefficient PTC electric heating assembly; It is characterized in that; Comprise jut and fin and two conduction filling-in bit terminals are installed, wherein, said two conduction filling-in bit terminals are connected to said fin; Said installation jut is inserted between two conduction filling-in bit terminals, and the surface that said installation jut inserts the part between said two conduction filling-in bit terminals scribbles silica gel.
2. PTC electric heating assembly according to claim 1 is characterized in that, further comprises:
The PTC pedestal, cover is connected to said fin, and said installation protruding part is in said PTC pedestal.
3. PTC electric heating assembly according to claim 1; It is characterized in that; The part that said installation jut inserts between said two conduction filling-in bit terminals is tapered; Said tapered part is processed by thermosetting resin, and wherein, said tapered part is processed by phenolic resin or epoxy resin.
4. PTC electric heating assembly according to claim 1 is characterized in that, on the surface of an end of conduction filling-in bit terminal and be provided with insulating material between two electrodes.
5. PTC electric heating assembly according to claim 1; It is characterized in that, further comprise temperature sensor and Thermal Cutoffs, wherein; Said fuse is electrically connected with a conduction filling-in bit terminal, and said Thermal Cutoffs is electrically connected with another conduction filling-in bit terminal.
6. PTC electric heating assembly according to claim 1; It is characterized in that; Said installation jut is processed by insulating resin; And this installation jut near the surface of an end of described conduction filling-in bit terminal on and be provided with insulation material layer between two electrodes, make the phase ratio creepage tracking index of PTC electric heating assembly greater than 300V and less than 800V.
7. PTC electric heating assembly according to claim 6 is characterized in that, this installation jut near the surface of an end of described conduction filling-in bit terminal on and the insulating material that is provided with between two electrodes be silicones or ultraviolet curing resinoid.
8. PTC electric heating assembly according to claim 6 is characterized in that, this installation jut near the surface of an end of described conduction filling-in bit terminal on and the insulating material layer thickness that is provided with between two electrodes greater than 0.03mm.
9. PTC electric heating assembly according to claim 6; It is characterized in that; Described installation jut is identical with two conduction shapes that filling-in bit terminal constituted near the shape of an end of described conduction filling-in bit terminal; And near described two conduction filling-in bit terminals, described two conduction filling-in bit terminal width are less than installing the jut width, and described two conduction filling-in bit terminals are made insulating barrier with the connecting portion of PTC electrode with heat-shrink tube or insulating tape separately.
10. PTC electric heating assembly according to claim 6 is characterized in that, described PTC electric heating assembly also has heat dissipating layer; Described heat dissipating layer covers on the surface of described PTC electric heating assembly, at a end near the conduction filling-in bit terminal, be clipped in described PTC electric heating assembly and the PTC pedestal between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100666032A CN102612176A (en) | 2012-03-15 | 2012-03-15 | PTC (positive temperature coefficient) electrical heating assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100666032A CN102612176A (en) | 2012-03-15 | 2012-03-15 | PTC (positive temperature coefficient) electrical heating assembly |
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| Publication Number | Publication Date |
|---|---|
| CN102612176A true CN102612176A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100666032A Pending CN102612176A (en) | 2012-03-15 | 2012-03-15 | PTC (positive temperature coefficient) electrical heating assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148095A (en) * | 2017-06-01 | 2017-09-08 | 江苏沙子电器有限公司 | A kind of PTC types heater fixed seat |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331860A (en) * | 1979-12-03 | 1982-05-25 | Fritz Eichenauer Gmbh & Co. Kg | Electrical resistance heating element |
| CN102355757A (en) * | 2011-09-16 | 2012-02-15 | 海尔集团公司 | Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly |
-
2012
- 2012-03-15 CN CN2012100666032A patent/CN102612176A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331860A (en) * | 1979-12-03 | 1982-05-25 | Fritz Eichenauer Gmbh & Co. Kg | Electrical resistance heating element |
| CN102355757A (en) * | 2011-09-16 | 2012-02-15 | 海尔集团公司 | Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148095A (en) * | 2017-06-01 | 2017-09-08 | 江苏沙子电器有限公司 | A kind of PTC types heater fixed seat |
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Application publication date: 20120725 |