CN102355757A - Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly - Google Patents
Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly Download PDFInfo
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- CN102355757A CN102355757A CN 201110273705 CN201110273705A CN102355757A CN 102355757 A CN102355757 A CN 102355757A CN 201110273705 CN201110273705 CN 201110273705 CN 201110273705 A CN201110273705 A CN 201110273705A CN 102355757 A CN102355757 A CN 102355757A
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Abstract
The invention discloses a method for preventing the tracking a PTC (Positive Temperature Coefficient) electrical heating assembly. An anticreep plugin made of insulating resin arranged in an insulating resin PTC base is fixed in the PTC base and is inserted in two conductive insertion piece terminals, and the surface of one end of the anticreep plugin, which is close to the conductive insertion piece terminals, is provided with a silicon resin or ultraviolet cured resin layer. In the method, tracking resistance strengthening treatment is carried out on the insulating resin between the conductive insertion piece terminals under the condition that the existing PTC electrical heating assembly is packaged, and the effect of no tracking is achieved without increasing the volume so as to further prevent the occurrence of fire.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of method of preventing PTC electric heating assembly creepage trace.
Background technology
PTC is the abbreviation of Positive Temperature Coefficient, and the meaning is positive temperature coefficient, and very big semi-conducting material or the components and parts of general reference positive temperature coefficient typically refer to semistor.
Since PTC electric heating used thickness greatly about the semiconductor magnetic sheet of 2-3mm as heater, can heat release under the nonventilated situation of air-condition heat exchanger, therefore must improve its fail safe; At present; General encapsulation mode is: the two sides at heater is provided with electrode; Cover insulating barrier; Encapsulate with the aluminium shell again; Electrode riveting or welding conduction filling-in bit terminal; Cause two distance between electrodes that apply supply voltage smaller like this, in the use creepage trace phenomenon (tracking) can take place; So then can cause insulating material sparking, the ignition of portion of terminal, portion of terminal, thereby cause the fire incident of air conditioner; At present, the insulating resin of fixing conduction filling-in bit terminal generally uses the higher PPS resin of thermal endurance.Though the resin of the fine heat-resisting performance of 200 ℃ of left and right sides high temperature of PPS resin system ability, its anti creepage trace performance a little less than, under the situation that has conductive liquid to exist, be easy to the initiation fire accident.
Summary of the invention
The objective of the invention is in order to address the above problem; A kind of method of the PTC of prevention electric heating assembly creepage trace is provided; This method is under the situation of existing P TC electric heating assembly encapsulation; Insulating resin between the conduction filling-in bit terminal carries out anti-trace intensive treatment; Under the situation that does not increase volume; Can not reach the trace effect, fail safe is higher, further prevents to use the generation of fire.
In order to achieve the above object; Technical scheme provided by the invention is: a kind of method of the PTC of prevention electric heating assembly creepage trace; This method is provided with on anticreep plug-in unit that insulating resin processes is fixed in the PTC pedestal; Be inserted in two conduction filling-in bit terminals, and this anticreep plug-in unit near the surface of an end of conduction filling-in bit terminal on and be provided with silicones or ultraviolet curing resinoid layer between two electrodes.
Anticreep plug-in unit is identical with two conduction shapes that filling-in bit terminal constituted near the shape of an end of conduction filling-in bit terminal, and near two conduction filling-in bit terminals.
Two conduction filling-in bit terminals drop in the cross section of anticreep plug-in unit with respect to the orthographic projection of anticreep plug-in unit.
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.
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.
The method of prevention PTC electric heating assembly creepage trace is also used fuse series connection PTC electric heating assembly, does overcurrent protection, be arranged in the PTC pedestal on.
The method of prevention PTC electric heating assembly creepage trace is application of temperature controller control PTC electric heating assembly also, be arranged in the PTC pedestal on.
Technical scheme of the present invention is on the basis of original PTC electric heating assembly, be clipped between the conduction filling-in bit terminal with insulating material (PPS resin etc.), and near the conduction filling-in bit terminal, the contact that cuts off between the conduction filling-in bit terminal prevents the electric leakage sparking; On the surface of anticreep plug-in unit, apply insulating varnish near the conduction filling-in bit terminal--silicones or ultraviolet curing resinoid, not on fire to guarantee; Heat-shrink tube use in junction (junction of PTC electrode and conduction filling-in bit terminal) at the conduction filling-in bit terminal, is in order to prevent conductive liquid conduction, prevents sparking (all coating is easy to connect for the outside); Fuse and thermostat are set, and are in order to protect the electric heating assembly with better application PTC; Increase radiator, increase work efficiency.
Description of drawings:
Fig. 1: a kind of application implementation example cross section structure sketch map that prevents the method for PTC electric heating assembly creepage trace of the present invention;
Fig. 2: a kind of anticreep plug-in unit of application implementation example cross section enlarged diagram that prevents the method for PTC electric heating assembly creepage trace of the present invention;
Fig. 3: the method application implementation example right side of a kind of PTC of prevention electric heating assembly of the present invention creepage trace shows sketch map (Fig. 1 turns left from the right side);
Fig. 4: a kind of conduction filling-in bit terminal and heat-shrink tube structural representation that prevents the method application implementation example of PTC electric heating assembly creepage trace of the present invention;
Fig. 5: a kind of anticreep plug-in unit cross section enlarged diagram that prevents the method application implementation example of PTC electric heating assembly creepage trace of the present invention.
Embodiment:
Embodiment 1: like Fig. 1,2,3, shown in 4:
A kind of method of preventing PTC electric heating assembly creepage trace; This method is with 2 anticreep plug-in unit 8 that insulating resin processes is set is fixed in the PTC pedestal on 2 in the insulating resin PTC pedestal; Be inserted in two conduction filling-in bit terminals 3; And this anticreep plug-in unit 8 near the surface of an end of conduction filling-in bit terminals 3 on and be provided with silicones or ultraviolet curing resinoid layer 4 (being silicones here) between two electrodes with spraying or brushing.
Anticreep plug-in unit 8 is identical with the shape that two conduction filling-in bit terminals 3 are constituted near the shape of an end of conduction filling-in bit terminal 3, and near two conduction filling-in bit terminals 3.
Two conduction filling-in bit terminals 3 drop in the cross section of anticreep plug-in unit 8 with respect to the orthographic projection of anticreep plug-in unit 8.
Two conduction filling-in bit terminals 3 are made insulating barrier 9 (being heat-shrink tube here) with the connecting portion of PTC electrode (not shown) with heat-shrink tube 9 or insulating tape separately.
PTC electric heating assembly 1 also has heat dissipating layer 5; Heat dissipating layer 5 covers on the surface of PTC electric heating assembly 1, at the end near conduction filling-in bit terminal 3, is clipped between PTC electric heating assembly 1 and the PTC pedestal interior 2.
The method of prevention PTC electric heating assembly creepage trace is also used fuse 6 series connection PTC electric heating assemblies 1, does overcurrent protection, is arranged on (can not be provided with on the coating layer 2, electrical connection gets final product) on the PTC pedestal interior 2.
The method of prevention PTC electric heating assembly creepage trace is application of temperature controller 7 control PTC electric heating assemblies 1 also, are arranged on (can not be provided with on the coating layer 2, electrical connection gets final product) on the PTC pedestal interior 2.
This technical scheme is on the basis of original PTC electric heating assembly, be clipped between the conduction filling-in bit terminal with insulating material (PPS resin etc.), and near the conduction filling-in bit terminal, the contact that cuts off between the conduction filling-in bit terminal 3 prevents the electric leakage sparking; On the surface of anticreep plug-in unit, apply insulating varnish near the conduction filling-in bit terminal--silicones or ultraviolet curing resinoid, not on fire to guarantee; Heat-shrink tube use in junction (junction of PTC electrode and conduction filling-in bit terminal) at the conduction filling-in bit terminal, is in order to prevent conductive liquid conduction, prevents sparking (all coating is easy to connect for the outside); Fuse and thermostat are set, and are in order to protect the electric heating assembly with better application PTC; Increase radiator, increase work efficiency.
Embodiment 2: like Fig. 1,2,3,4, shown in 5:
Most of identical with embodiment 1; Be with embodiment 1 difference: the surface of an end of not only anticreep plug-in unit 8 close conduction filling-in bit terminals 3 is provided with silicones or ultraviolet curing resinoid layer 4 (is silicones here; With spraying or brushing); And to its remote extension silicon-coated resin or ultraviolet curing resinoid layer 4; General 10 millimeter of extending are with the effect of strengthening completely cutting off.And an end of anticreep plug-in unit 8 close conduction filling-in bit terminals 3 is changed to the trapezoidal of Fig. 5 by the intimate triangle of Fig. 2, strengthens to adapt to conduction filling-in bit terminal 3 angles, increases the scope of application.
Obviously, the above embodiment of the present invention only be for clearly the present invention is described and is done for example, and be not to be qualification to execution mode of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (7)
1. method of preventing PTC electric heating assembly creepage trace; It is characterized in that: this method is fixed on described in the PTC pedestal with the anticreep plug-in unit that insulating resin processes is set; Be inserted between two conduction filling-in bit terminals, and this anticreep plug-in unit near the surface of an end of described conduction filling-in bit terminal on and be provided with silicones or ultraviolet curing resinoid layer between two electrodes.
2. the method for prevention PTC electric heating assembly creepage trace according to claim 1; It is characterized in that: described anticreep plug-in unit 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.
3. the method for prevention PTC electric heating assembly creepage trace according to claim 1 is characterized in that: described two conduction filling-in bit terminals drop in the cross section of described anticreep plug-in unit with respect to the orthographic projection of described anticreep plug-in unit.
4. the method for prevention PTC electric heating assembly creepage trace according to claim 1 is characterized in that: 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.
5. the method for prevention PTC electric heating assembly creepage trace according to claim 1, it 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.
6. the method for prevention PTC electric heating assembly creepage trace according to claim 1; It is characterized in that: the method for described prevention PTC electric heating assembly creepage trace is also used the fuse described PTC electric heating assembly of connecting, and does overcurrent protection, be arranged in the described PTC pedestal on.
7. the method for prevention PTC electric heating assembly creepage trace according to claim 1; It is characterized in that: the method for described prevention PTC electric heating assembly creepage trace also application of temperature controller is controlled described PTC electric heating assembly, be arranged in the described PTC pedestal on.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110273705 CN102355757A (en) | 2011-09-16 | 2011-09-16 | Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly |
| CN201110440049.5A CN102595662B (en) | 2011-09-16 | 2011-12-26 | A kind of method of preventing PTC electric heating assembly creepage trace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110273705 CN102355757A (en) | 2011-09-16 | 2011-09-16 | Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly |
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| Publication Number | Publication Date |
|---|---|
| CN102355757A true CN102355757A (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110273705 Pending CN102355757A (en) | 2011-09-16 | 2011-09-16 | Method for preventing tracking of PTC (Positive Temperature Coefficient) electrical heating assembly |
| CN201110440049.5A Active CN102595662B (en) | 2011-09-16 | 2011-12-26 | A kind of method of preventing PTC electric heating assembly creepage trace |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110440049.5A Active CN102595662B (en) | 2011-09-16 | 2011-12-26 | A kind of method of preventing PTC electric heating assembly creepage trace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612176A (en) * | 2012-03-15 | 2012-07-25 | 海尔集团公司 | PTC (positive temperature coefficient) electrical heating assembly |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4091267A (en) * | 1976-07-19 | 1978-05-23 | Texas Instruments Incorporated | Self-regulating electric heater |
| CN2206529Y (en) * | 1995-01-03 | 1995-08-30 | 李锦源 | Positive temp. coefficient thermal resistor heater |
| JPH08213153A (en) * | 1995-02-06 | 1996-08-20 | Matsushita Electric Ind Co Ltd | Positive temperature coefficient thermistor heater device, manufacture thereof and electronic equipment equipped with the heater device |
| CN2500059Y (en) * | 2001-08-23 | 2002-07-10 | 台州市凯乐电器有限公司 | Electrode self connection ripple electric heater |
| JPWO2005038826A1 (en) * | 2003-10-21 | 2007-02-01 | タイコ エレクトロニクス レイケム株式会社 | PTC element and starter circuit for fluorescent lamp |
| KR100697918B1 (en) * | 2005-01-12 | 2007-03-20 | 엘에스전선 주식회사 | PTC current limiting device having structure preventing flashover |
-
2011
- 2011-09-16 CN CN 201110273705 patent/CN102355757A/en active Pending
- 2011-12-26 CN CN201110440049.5A patent/CN102595662B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612176A (en) * | 2012-03-15 | 2012-07-25 | 海尔集团公司 | PTC (positive temperature coefficient) electrical heating assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102595662B (en) | 2016-03-09 |
| CN102595662A (en) | 2012-07-18 |
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Open date: 20120215 |