CN204720975U - A kind of heating wire operator guards stage by stage - Google Patents
A kind of heating wire operator guards stage by stage Download PDFInfo
- Publication number
- CN204720975U CN204720975U CN201520312793.0U CN201520312793U CN204720975U CN 204720975 U CN204720975 U CN 204720975U CN 201520312793 U CN201520312793 U CN 201520312793U CN 204720975 U CN204720975 U CN 204720975U
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- control switch
- auxiliary circuit
- stage
- input
- circuit
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Abstract
The utility model discloses 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, 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.The utility model utilizes auxiliary circuit and connects the switching of circuit to control output current, and arranges by fuse and auxiliary circuit the protection stage by stage connecing circuit realized heating wire.
Description
Technical field
The utility model relates to technical field of electricity, particularly relates 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.
Utility model content
Based on the technical problem that above-mentioned background technology exists, the utility model proposes a kind of heating wire operator guards stage by stage, circuit can be connect to heating wire and carry out overtemperature protection stage by stage.
The utility model 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 utility model, 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 utility model; 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 utility model 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 that the utility model proposes operator guards stage by stage.
Embodiment
Below, by specific embodiment, the technical solution of the utility model is described in detail.
As shown in Figure 1, Fig. 1 is the structural representation of a kind of heating wire that the utility model proposes operator guards stage by stage.
With reference to Fig. 1, a kind of heating wire operator guards stage by stage that the utility model embodiment 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 utility model 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 utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection range of the present utility model.
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. heating wire according to claim 1 operator guards stage by stage, 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. heating wire according to claim 2 operator guards stage by stage; 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. heating wire according to claim 2 operator guards stage by stage; 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 operator guards stage by stage of the heating wire 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 |
|---|---|---|---|
| CN201520312793.0U CN204720975U (en) | 2015-05-14 | 2015-05-14 | A kind of heating wire operator guards stage by stage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520312793.0U CN204720975U (en) | 2015-05-14 | 2015-05-14 | A kind of heating wire operator guards stage by stage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204720975U true CN204720975U (en) | 2015-10-21 |
Family
ID=54319942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520312793.0U Expired - Fee Related CN204720975U (en) | 2015-05-14 | 2015-05-14 | A kind of heating wire operator guards stage by stage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204720975U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810811A (en) * | 2015-05-14 | 2015-07-29 | 安徽省宁国市天成电气有限公司 | Staged protection structure for heating wire |
| CN109523974A (en) * | 2018-12-26 | 2019-03-26 | 深圳市华星光电半导体显示技术有限公司 | Display device |
-
2015
- 2015-05-14 CN CN201520312793.0U patent/CN204720975U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810811A (en) * | 2015-05-14 | 2015-07-29 | 安徽省宁国市天成电气有限公司 | Staged protection structure for heating wire |
| CN109523974A (en) * | 2018-12-26 | 2019-03-26 | 深圳市华星光电半导体显示技术有限公司 | Display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20200514 |