CN104810811A - Staged protection structure for heating wire - Google Patents
Staged protection structure for heating wire Download PDFInfo
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- CN104810811A CN104810811A CN201510246334.1A CN201510246334A CN104810811A CN 104810811 A CN104810811 A CN 104810811A CN 201510246334 A CN201510246334 A CN 201510246334A CN 104810811 A CN104810811 A CN 104810811A
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- control switch
- auxiliary circuit
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- heating wire
- circuit
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Abstract
The invention discloses a staged protection structure for a heating wire. The staged protection structure for the heating wire comprises a heating wire body and a fuse, wherein the fuse is mounted in a power connection circuit between the heating wire body and an output power supply, and a first control switch is mounted between the input end of the fuse and the output end of the power supply; the first control switch is in a normally closed state, and when a current value input by the first control switch is greater than a preset turn-off current value, the first control switch is switched off; an auxiliary circuit is connected in parallel between the input end and the output end of the first control switch, and a second control switch is mounted between the input end of the auxiliary circuit and the input end of the first control switch; the second control switch is in a normally open state, and only when the first control switch is switched off, the second control switch is switched on. According to the staged protection structure for the heating wire, output current is controlled by utilizing switching of the auxiliary circuit and the power connection circuit, and the staged protection of the power connection circuit of the heating wire is achieved by arranging the fuse and the auxiliary circuit.
Description
Technical field
The present invention relates to technical field of electricity, particularly relate to a kind of heating wire operator guards stage by stage.
Background technology
Heating wire on heating element is resistance wire, resistance wire connects out-put supply by connecing circuit, affect by the factor such as input voltage, load, transformer characteristic of power supply owing to connecing circuit, burst current can be produced, the generation of burst current can cause and connect electric circuital current and increase instantaneously, and the wire moment in circuit is overheated, even ignites, burn circuit, even cause the serious consequences such as electrical fires.
Therefore need to carry out overtemperature protection to circuit.Simultaneously because the size of the current value of burst current is uncertain, be difficult to the parameter acquiring a satisfaction, when device parameters is unreasonable, long-time interval break-make, also can cause device seriously to generate heat, may damage semiconductor device; Therefore, need to protect stage by stage circuit.
Summary of the invention
Based on the technical problem that above-mentioned background technology exists, the present invention proposes a kind of heating wire operator guards stage by stage, can connect circuit carry out overtemperature protection stage by stage to heating wire.
The present invention proposes a kind of heating wire operator guards stage by stage, comprise: heating wire body and fuse, fuse is arranged on connecing in circuit between heating wire body and out-put supply, and is provided with the first control switch between fuse input and the output of power supply; First control switch is normally off, and when the current value of the first control switch input is greater than its default turn-off current value, the first control switch disconnects; Auxiliary circuit is parallel with between the input of the first control switch and output, and the resistance value in auxiliary circuit is greater than the resistance value connect in circuit, between the input of auxiliary circuit and the input of the first control switch, the second control switch is installed, and the second control switch is normally open, only when the first control switch disconnects, the second control switch closes.
Preferably, the quantity of auxiliary circuit is two, is respectively the first auxiliary circuit and the second auxiliary circuit, and wherein, the first auxiliary circuit and the second auxiliary circuit are connected in parallel to each other setting, and the resistance value in the first auxiliary circuit is less than the resistance value in the second auxiliary circuit; And if only if when the first auxiliary circuit disconnects, the second auxiliary circuit conducting.
Preferably, the quantity of the second control switch is two, one of them second control switch is arranged between the input of the first auxiliary circuit and the input of the first control switch, and another second control switch is arranged between the input of the second auxiliary circuit and the input of the first control switch.
Preferably, the first auxiliary circuit comprises resistance R1, the output of input termination second control switch of resistance R1, the input of the output sending and receiving heated filament body of resistance R1.
Preferably, the second auxiliary circuit comprises resistance R2, and the resistance value of resistance R2 is greater than the resistance value of resistance R1, the output of input termination second control switch of resistance R2, the input of the output sending and receiving heated filament body of resistance R2.
In the present invention, by connecing installation insurance silk in circuit between heating wire body and out-put supply; And between fuse output and the input of heating wire body, the first control switch being installed, the first control switch is normally off, and the turn-off current value working as the first switch is less than the blow-out current value of fuse, and the first control switch disconnects; Auxiliary circuit is parallel with between the input of the first control switch and output, and the resistance value in auxiliary circuit is greater than the resistance value connect in circuit, between the input of auxiliary circuit and the input of the first control switch, the second control switch is installed, and the second control switch is normally open, only when the first control switch disconnects, the second control switch closes; In normal operation, out-put supply is connected with heating wire with fuse via the first control switch heating wire body in the present invention; When the current value of out-put supply is increased to the turn-off current value being greater than the first control switch, first control switch disconnects, second control switch closes, out-put supply starts to be connected with heating wire body via the second control switch, auxiliary circuit and fuse, and the resistance value due to auxiliary circuit is greater than the resistance value connect in circuit, therefore, when out-put supply flows through auxiliary circuit, electric current in circuit is reduced, thus avoids wire superheating phenomenon, plays the superheat protecting function of docking circuit; When out-put supply carries out increase resistance value via auxiliary circuit, when the current value reducing to be input to after current value fuse is still greater than the blow-out current value of fuse, blown fuse.
In sum; the present invention utilizes auxiliary circuit and connects the switching of circuit to control output current; prevent the excessive circuit that causes of electric current from damaging; and the protection stage by stage connecing circuit realized heating wire is set by fuse and auxiliary circuit; avoid because of fuse parameter unreasonable time; long-time interval break-make, the problem of caused device failure.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of heating wire of proposing of the present invention operator guards stage by stage.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
As shown in Figure 1, Fig. 1 is the structural representation of a kind of heating wire of proposing of the present invention operator guards stage by stage.
With reference to Fig. 1, a kind of heating wire operator guards stage by stage that the embodiment of the present invention proposes, comprising: heating wire body 1, fuse 2 and two the second control switchs 4.
Fuse 2 is arranged on connecing in circuit between heating wire body 1 and out-put supply, and is provided with the first control switch 3 between fuse 2 input and the output of power supply; Under normal operating conditions, the first control switch 3 is normally off, and out-put supply is connected with heating wire body 1 with fuse 2 via the first control switch 3; When the current value that the first control switch 3 inputs is greater than its default turn-off current value, the first control switch 3 disconnects; Now connect circuit and entered for the first protection stage.
The first auxiliary circuit 5 and the second auxiliary circuit 6 is parallel with between the input of the first control switch 3 and output, first auxiliary circuit 5 and the second auxiliary circuit 6 are connected in parallel to each other setting, wherein, resistance value in first auxiliary circuit 5 is greater than the resistance value connect in circuit, first auxiliary circuit 5 comprises resistance R1, the input of resistance R1 through the input connecing the first control switch 3 of the second control switch 4, the input of the output sending and receiving heated filament body 1 of resistance R1; And when the first control switch 3 disconnects, the second control switch 4 closes; When second control switch 4 closes, namely represent that connecing circuit entered for the first protection stage; Now, out-put supply starts to be connected with heating wire body 1 with fuse 2 via the second control switch 4, first auxiliary circuit 5, because the resistance value of the first auxiliary circuit 5 is greater than the resistance value connect in circuit, therefore, when out-put supply flows through the first auxiliary circuit 5, electric current in circuit is reduced, the overtemperature protection of the circuit that achieves a butt joint; When the current value of input of the second control switch 4 being connected to the first auxiliary circuit 5 input is greater than turn-off current value that it presets, the second control switch 4 disconnects; Now connect circuit and entered for the second protection stage.
Second auxiliary circuit 6 comprises resistance R2, and the resistance value of resistance R2 is greater than the resistance value of resistance R1, and the input of resistance R2 connects the input of the first control switch 3 through the second control switch 4, the input of the output sending and receiving heated filament body 1 of resistance R2; And the second control switch 4 being connected to the first auxiliary circuit 5 input is when disconnecting, the second control switch 4 be connected in the second auxiliary circuit 6 closes; When the second control switch 4 being connected to the second auxiliary circuit 6 input closes, namely represent that connecing circuit entered for the second protection stage; Out-put supply starts to be connected with heating wire body 1 with fuse 2 via the second control switch 4, second auxiliary circuit 6; resistance value due to the resistance R2 in the second auxiliary circuit 6 is greater than the resistance value of resistance R1; therefore; when out-put supply flows through the second auxiliary circuit 6; electric current in circuit is less than electric current when flowing through in the first auxiliary circuit 5, thus the overtemperature protection of the circuit that achieves a butt joint.
When out-put supply is still greater than the blow-out current value of fuse 2 via the current value that rear output shunted by the second auxiliary circuit 6, fuse 2 fuses, thus the overtemperature protection of the circuit that achieves a butt joint.
The present invention utilizes auxiliary circuit and connects the switching of circuit to control output current; prevent the excessive circuit that causes of electric current from damaging; and the circuit stage that connects that can realize heating wire body 1 that arranges of fuse 2 and auxiliary circuit protect; avoid because of fuse 2 parameter unreasonable time; long-time interval break-make, the problem that caused heating wire body 1 damages.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (5)
1. heating wire operator guards stage by stage, it is characterized in that, comprise: heating wire body (1) and fuse (2), fuse (2) is arranged on connecing in circuit between heating wire body (1) and out-put supply, and fuse (2) is provided with the first control switch 3 between input and the output of power supply; First control switch 3 is normally off, and when the current value that the first control switch 3 inputs is greater than its default turn-off current value, the first control switch (3) disconnects; Auxiliary circuit is parallel with between the input of the first control switch (3) and output, and the resistance value in auxiliary circuit is greater than the resistance value connect in circuit, between the input of auxiliary circuit and the input of the first control switch (3), the second control switch 4 is installed, and the second control switch 4 is normally open, only when the first control switch (3) disconnects, the second control switch (4) closes.
2. the heating element heating wire of band overtemperature protection according to claim 1, it is characterized in that, the quantity of auxiliary circuit is two, be respectively the first auxiliary circuit (5) and the second auxiliary circuit (6), wherein, first auxiliary circuit (5) and the second auxiliary circuit (6) are connected in parallel to each other setting, and the resistance value in the first auxiliary circuit (5) is less than the resistance value in the second auxiliary circuit (6); And if only if when the first auxiliary circuit (5) disconnects, the second auxiliary circuit (6) conducting.
3. the heating element heating wire of band overtemperature protection according to claim 2; it is characterized in that; the quantity of the second control switch (4) is two; one of them second control switch (4) is arranged between the input of the first auxiliary circuit (5) and the input of the first control switch (3), and another second control switch (4) is arranged between the input of the second auxiliary circuit (6) and the input of the first control switch (3).
4. the heating element heating wire of band overtemperature protection according to claim 2; it is characterized in that; first auxiliary circuit (5) comprises resistance R1; the output of input termination second control switch (4) of resistance R1, the input of output sending and receiving heated filament body (1) of resistance R1.
5. the heating element heating wire of the band overtemperature protection according to Claims 2 or 3 or 4; it is characterized in that; second auxiliary circuit (6) comprises resistance R2; the resistance value of resistance R2 is greater than the resistance value of resistance R1; the output of input termination second control switch (4) of resistance R2, the input of output sending and receiving heated filament body (1) of resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510246334.1A CN104810811A (en) | 2015-05-14 | 2015-05-14 | Staged protection structure for heating wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510246334.1A CN104810811A (en) | 2015-05-14 | 2015-05-14 | Staged protection structure for heating wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104810811A true CN104810811A (en) | 2015-07-29 |
Family
ID=53695419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510246334.1A Pending CN104810811A (en) | 2015-05-14 | 2015-05-14 | Staged protection structure for heating wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104810811A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483076A (en) * | 2021-06-16 | 2022-12-16 | 南京泉峰科技有限公司 | Fuse device suitable for battery pack, battery pack and electric tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040042142A1 (en) * | 2002-08-29 | 2004-03-04 | Murata Manufacturing Co., Ltd. | Overheat protection circuit |
| CN2821978Y (en) * | 2005-09-12 | 2006-09-27 | 胜德国际研发股份有限公司 | Protector of abrupt wave absorber |
| CN102799557A (en) * | 2012-07-16 | 2012-11-28 | 福建星网锐捷网络有限公司 | Hot plugging single board and method for measuring power of hot plugging single board |
| CN204144932U (en) * | 2014-07-07 | 2015-02-04 | 孙麓轩 | A kind of novel surge protection device |
| CN204258262U (en) * | 2014-11-17 | 2015-04-08 | 广州市芯科电子科技有限公司 | Anti-overheated anti-pressure type toaster excessively |
| CN204720975U (en) * | 2015-05-14 | 2015-10-21 | 安徽省宁国市天成电气有限公司 | A kind of heating wire operator guards stage by stage |
-
2015
- 2015-05-14 CN CN201510246334.1A patent/CN104810811A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040042142A1 (en) * | 2002-08-29 | 2004-03-04 | Murata Manufacturing Co., Ltd. | Overheat protection circuit |
| CN2821978Y (en) * | 2005-09-12 | 2006-09-27 | 胜德国际研发股份有限公司 | Protector of abrupt wave absorber |
| CN102799557A (en) * | 2012-07-16 | 2012-11-28 | 福建星网锐捷网络有限公司 | Hot plugging single board and method for measuring power of hot plugging single board |
| CN204144932U (en) * | 2014-07-07 | 2015-02-04 | 孙麓轩 | A kind of novel surge protection device |
| CN204258262U (en) * | 2014-11-17 | 2015-04-08 | 广州市芯科电子科技有限公司 | Anti-overheated anti-pressure type toaster excessively |
| CN204720975U (en) * | 2015-05-14 | 2015-10-21 | 安徽省宁国市天成电气有限公司 | A kind of heating wire operator guards stage by stage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483076A (en) * | 2021-06-16 | 2022-12-16 | 南京泉峰科技有限公司 | Fuse device suitable for battery pack, battery pack and electric tool |
| CN115483076B (en) * | 2021-06-16 | 2024-01-19 | 南京泉峰科技有限公司 | Fuse device suitable for battery pack, battery pack and electric tool |
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Application publication date: 20150729 |
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