CN207381194U - A kind of wire resistor with circuit protection - Google Patents
A kind of wire resistor with circuit protection Download PDFInfo
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- CN207381194U CN207381194U CN201721470563.2U CN201721470563U CN207381194U CN 207381194 U CN207381194 U CN 207381194U CN 201721470563 U CN201721470563 U CN 201721470563U CN 207381194 U CN207381194 U CN 207381194U
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- wire
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- ceramic body
- circuit protection
- resistor
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Abstract
The utility model is related to power electric component technical fields; concretely it is related to a kind of wire resistor with circuit protection; including ceramic body, the resistance wire being around on ceramic body, the extended tinned wire in resistance wire both ends and the end cap for being arranged at ceramic body both ends; coiling helicla flute is provided on ceramic body; resistance wire is PTC temperature sensitive alloy wire rod resistance wires; resistance wire outsourcing is equipped with thermal conducting sleeve; thermal conducting sleeve inner wall is provided with scribbles epoxy resin insulating varnish layer outside with the matched internal thread of the resistance wire of coiling, thermal conducting sleeve；The wire resistor of the utility model; double action with insurance fuse and resistance; wire resistor with circuit protection is with multiple functions and the same electrical characteristic such as conventional, electric-resistance decompression, partial pressure, coupling platform, matching; when temperature reaches the fusing point of PTC alloy wires; it will make the fusing of PTC wire rods, fuse and cut off electric current; so as to which other elements in circuit be protected to exempt from damage, and prevent the expansion of failure.
Description
Technical field
The utility model is related to power electric component technical field, be concretely related to it is a kind of with circuit protection around
Line resistance.
Background technology
Wire wound resistor be mainly used in low-frequency ac circuit play decompression, shunting, load, feedback, turn can, matching etc.
Absorber and divider are played the role of in effect in a power, it is also possible to make attenuation in concussion circuit and transformer and adjust
Current divider in whole and pulse shaping circuit.In addition, it can also be used to the electric discharge of filtering stage capacitor and antispark in rectifier.Together
When can be widely applied to the fields such as household electrical appliances, Medical Devices, automobile industry, railway, aviation, military equipment instrument.
Wirewound resistor, in daily life using very extensively, wirewound resistor is connect as a current limiting element
After in circuit, it can limit the size of current by its institute's chord road, and line geometric pattern resistor is number of applications in electronic circuit
One of most element.
Meanwhile as the promotion of social productive forces level can more and more promote people's quality of the life, promotion people now
Working Life efficiency High Voltage Circuit Breaker it is very universal entered in people’s lives, just occur at present from
The driving of electric power is often be unable to do without for dynamicization electrical equipment, in practice in order to avoid short circuit is occurring in electrical equipment
In the case of entire electronic control part be unlikely to whole and all burnt out by electric current, relevant circuit is all set in electrical equipment now
Protective device, and the circuit protection device most extensive, that cost is most cheap, protecting effect is best applied now is exactly various insurances
Guan Liao.
Protective tube is also referred to as fuse, it is a kind of electric elements installed and ensure circuit safety operation in circuit.
The effect of protective tube mainly plays the role of overload protection, when circuit malfunctions or exception, is constantly risen with electric current
Height, and raised electric current is it is possible that some important devices in damage circuit or when valuable device, if in circuit just
Really dispose protective tube, then, protective tube will carry out self fusing when current anomaly is increased to certain degree
So as to have the function that cut off current protecting circuit safe operation.
Just because of electronics electricity of protective tube when practical application with preferable overload protective function typically now
Protective tube can be all set in road, and present protective tube is generally all made of tube body, cap and fuse, and cap lid is located at tube body two
End, fuse are located in tube body and are connected between the cap at tube body both ends, and fuse has high current by voluntarily melting disconnected spy
Property, so when the electric current in circuit is more than rated current, fuse be heated voluntarily melt it is disconnected, so as to reach the whole electricity of cut-out
Road achievees the purpose that overload protection.
It is arranged at however, existing wirewound resistor and protective tube are generally separately independent in electronic circuit, adds electricity
Complexity in sub-circuit, it would be highly desirable to develop a kind of existing protective tube effect, and the coiling electricity of resistance function can be played a dual role of
Resistance.
Utility model content
Therefore the utility model proposes a kind of wire resistor with circuit protection, existing protective tube effect, and can play
The wire resistor of resistance function double action.
What the technical solution of the utility model was realized in：A kind of wire resistor with circuit protection, including ceramics
Body, the resistance wire being around on ceramic body, the extended tinned wire in resistance wire both ends and the end cap for being arranged at ceramic body both ends,
It is provided with coiling helicla flute on the ceramic body, the resistance wire is PTC temperature sensitive alloy wire rod resistance wires, the resistance wire outsourcing
Equipped with thermal conducting sleeve, the thermal conducting sleeve inner wall be provided with the matched internal thread of the resistance wire of coiling, outside the thermal conducting sleeve
Scribble epoxy resin insulating varnish layer.
Operation principle：Running current or the overload current of permission by when, PTC temperature sensitive alloy wire rods resistance wire generates
Heat to ambient radiation, it is gradual by the heat that convection current, conduction, ceramic body, thermal conducting sleeve mode distribute and the heat generated
Reach balance；When electric current gradually increases, also simultaneously and rapidly raised using PTC temperature sensitive alloy wire rod resistance wire resistance values, according to ohm
Law：I=U/R resistance values are inversely proportional with electric current, and resistance value raises to play metering function；It is distributed when the heat of generation is more than
Heat, extra heat is gathered in alloy wire fusable links, and fusable links PTC wire temperatures is made to increase, and is closed when temperature reaches PTC
During the fusing point of gold thread material, the fusing of PTC wire rods will be made, fuse and cut off electric current, play the role of protecting circuit.
Further, through hole is provided in the middle part of the end cap, the tinned wire extends to both ends through through hole, and tin plating
It welds the contact position of conducting wire and end cap.
Further, the epoxy resin insulating varnish layer is provided outside standard colour coding band.
Further, it is coated with insulating layer outside the resistance wire.
Further, the thickness of the insulating layer is between 1 to 10 micron.
By above disclosure, the beneficial effects of the utility model are：The wire resistor of the utility model has insurance
The double action of fuse and resistance, the wire resistor with circuit protection is with conventional, electric-resistance decompression, partial pressure, coupling platform, matching etc.
Multiple functions and same electrical characteristic；Resistance fuses, and when the heat of generation is more than the heat distributed, extra heat is gathered in
In the fusable links of PTC temperature sensitive alloy wire rod resistance wires, fusable links PTC wire temperatures is made to increase, when temperature reaches PTC alloy wires
Fusing point when, will make the fusing of PTC wire rods, fusing and cut off electric current, so as to which other elements be protected in circuit to exempt from damage, and
Prevent the expansion of failure.
Description of the drawings
Fig. 1 is a kind of biopsy cavity marker devices stereoscopic schematic diagram of the wire resistor embodiment with circuit protection of the utility model.
Fig. 2 is a kind of exploded isometric schematic diagram of the wire resistor embodiment with circuit protection of the utility model.
Fig. 3 is the enlarged structure schematic diagram of ceramic body in Fig. 1.
Fig. 4 is the cut-away illustration of thermal conducting sleeve and epoxy resin insulating varnish layer in Fig. 1.
Reference numeral is as follows：
Ceramic body 1, coiling helicla flute 11, resistance wire 2, end cap 3, tinned wire 4, thermal conducting sleeve 5, internal thread 51, epoxy
Insulation resin enamelled coating 6, standard colour coding band 61.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that described embodiment is only the part of the embodiment rather than whole of the utility model
Embodiment.Embodiment based on the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each component etc., if
When the particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description in " first ", " second " etc. involved in the utility model is only used for description purpose, without being understood that
To indicate or implying its relative importance or the implicit quantity for indicating indicated technical characteristic.Define as a result, " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Conflicting or can not realize when occur will be understood that the combination of this technical solution is not present, also not in the requires of the utility model
Protection domain in.
The utility model proposes a kind of wire resistors with circuit protection.
As depicted in figs. 1 and 2, a kind of wire resistor with circuit protection including ceramic body 1, is around on ceramic body 1
Resistance wire 2, the extended tinned wire 4 in 2 both ends of resistance wire and the end cap 3 for being arranged at 1 both ends of ceramic body, resistance wire 2 are PTC
Temperature sensitive alloy wire rod resistance wire, 2 outsourcing of resistance wire are equipped with thermal conducting sleeve 5, and 3 middle part of end cap is provided with through hole, and tinned wire 4 passes through
Through hole extends to both ends, and tinned wire 4 and the contact position of end cap 3 are welded；It (is mark in figure that insulating layer is scribbled outside resistance wire 2
Go out), for the thickness of insulating layer between 1 to 10 micron, insulating layer can be the one of epoxy resin, silica gel noninflammability paint or enamel paint
Kind or it is arbitrary several, alloy wire preferably has that high resistivity, temperature-coefficient of electrical resistance are small, surface oxidation-resistant performance is good, corrosion resistant
Corrosion can good, good processing performance and the good B alloy wire of solderability, and there are high temperature resistant, high pressure resistant, insulation and anti-flammability in surface
Good insulated paint package structure.
As shown in figure 3, coiling helicla flute 11 is provided on ceramic body 1, and ceramic body 1 is beryllium oxide ceramics, aluminium nitride pottery
One kind in porcelain, boron nitride ceramics, silicon carbide ceramics.
As shown in figure 4,5 inner wall of thermal conducting sleeve is provided with and 2 matched internal thread 51 of the resistance wire of coiling, thermal conducting sleeve 5
Epoxy resin insulating varnish layer 6 is scribbled outside, epoxy resin insulating varnish layer 6 is provided outside standard colour coding band 61, the material of thermal conducting sleeve 5
For silver, copper, gold one or more.
The operation principle of the utility model：When PTC temperature sensitive alloy wire rods resistance wire is powered, being converted to thermal energy by electric energy makes
Resistance temperature rises, when electric current flows through conductor, because wire resistor conductor is there are certain resistance, so wire resistor conductor will
It can generate heat.And caloric value follows this formula：Q=0.24I2RT；Wherein Q is caloric value, and 0.24 is a constant, I
It is the electric current for flowing through wire resistor conductor, R is the resistance of wire resistor conductor, and T is the time that electric current flows through wire resistor conductor.
Running current or the overload current of permission by when, heat that PTC temperature sensitive alloy wire rods resistance wire generates to
Ambient radiation is progressivelyed reach flat by the heat of the heat that convection current, conduction, ceramic body 1,5 mode of thermal conducting sleeve distribute and generation
Weighing apparatus；When electric current gradually increases, PTC temperature sensitive alloy wire rod resistance wire resistance values also simultaneously and rapidly raise, according to Ohm's law：I=U/R
Resistance value is inversely proportional with electric current, and resistance value raises to play metering function；It is extra when the heat of generation is more than the heat that distributes
Heat be gathered in alloy wire fusable links, fusable links PTC wire temperatures is made to increase, when temperature reaches the molten of PTC alloy wires
During point, the fusing of PTC wire rods will be made, fuse and cut off electric current, play the role of protecting circuit.Such fuse has and protects
The double action of dangerous fuse and resistance, under normal circumstances, insurance resistance have conventional, electric-resistance decompression, partial pressure, coupling platform, matching etc.
Multiple functions and same electrical characteristic once abnormal, such as generation short circuit or overload occurs in circuit, flow through the electric current of insurance resistance
It can greatly increase, resistance fusing, so as to which other elements in circuit be protected to exempt from damage, and prevent the expansion of failure.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover among the right of the utility model.
Claims (5)
1. a kind of wire resistor with circuit protection, including ceramic body (1), the resistance wire (2) being around on ceramic body (1), electricity
The resistance extended tinned wire in silk (2) both ends (4) and the end cap (3) for being arranged at ceramic body (1) both ends, it is characterised in that：It is described
It is provided with coiling helicla flute (11) on ceramic body (1), the resistance wire (2) is PTC temperature sensitive alloy wire rod resistance wires, the resistance
Silk (2) outsourcing is equipped with thermal conducting sleeve (5), and thermal conducting sleeve (5) inner wall is provided with and the matched interior spiral shell of the resistance wire of coiling (2)
Line (51), the thermal conducting sleeve (5) scribble epoxy resin insulating varnish layer (6) outside.
2. a kind of wire resistor with circuit protection according to claim 1, it is characterised in that：In the end cap (3)
Portion is provided with through hole, and the tinned wire (4) extends to both ends, and tinned wire (4) and the contact position of end cap (3) through through hole
Welding.
3. a kind of wire resistor with circuit protection according to claim 2, it is characterised in that：The epoxy resin is exhausted
Edge enamelled coating (6) is provided outside standard colour coding band (61).
4. a kind of wire resistor with circuit protection according to claim 3, it is characterised in that：The resistance wire (2)
It is coated with insulating layer outside.
5. a kind of wire resistor with circuit protection according to claim 4, it is characterised in that：The thickness of the insulating layer
Degree is between 1 to 10 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470563.2U CN207381194U (en) | 2017-11-07 | 2017-11-07 | A kind of wire resistor with circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470563.2U CN207381194U (en) | 2017-11-07 | 2017-11-07 | A kind of wire resistor with circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207381194U true CN207381194U (en) | 2018-05-18 |
Family
ID=62334607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721470563.2U Active CN207381194U (en) | 2017-11-07 | 2017-11-07 | A kind of wire resistor with circuit protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207381194U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978405A (en) * | 2017-11-07 | 2018-05-01 | 深圳市东凌电子有限公司 | A kind of wire resistor and its preparation process with circuit protection |
| CN110047635A (en) * | 2019-05-05 | 2019-07-23 | 西北核技术研究所 | Solid flexible resistance for edge pulse power supply of drawing last breath |
-
2017
- 2017-11-07 CN CN201721470563.2U patent/CN207381194U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978405A (en) * | 2017-11-07 | 2018-05-01 | 深圳市东凌电子有限公司 | A kind of wire resistor and its preparation process with circuit protection |
| CN110047635A (en) * | 2019-05-05 | 2019-07-23 | 西北核技术研究所 | Solid flexible resistance for edge pulse power supply of drawing last breath |
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