CN203984378U - The calling protection device of household electrical appliance - Google Patents
The calling protection device of household electrical appliance Download PDFInfo
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- CN203984378U CN203984378U CN201420444353.6U CN201420444353U CN203984378U CN 203984378 U CN203984378 U CN 203984378U CN 201420444353 U CN201420444353 U CN 201420444353U CN 203984378 U CN203984378 U CN 203984378U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- 230000005611 electricity Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model provides a kind of calling protection device of household electrical appliance, and power supply indicator is connected between live wire and zero line, the first electronic circuit, and it comprises the first resistance, normal open switch and the polarity free capacitor being serially connected with successively between live wire and zero line; The second electronic circuit, it comprises turn-offed formula bidirectional triode thyristor, the second resistance, normally closed switch and the polarity free capacitor being serially connected with successively between live wire and zero line, the anode that can turn-off formula bidirectional triode thyristor is connected with live wire, and the trigger electrode that can turn-off formula bidirectional triode thyristor is connected with zero line by polarity free capacitor; Load and load power source repeater lamp are connected between the negative electrode and zero line that can turn-off formula bidirectional triode thyristor.According to the calling protection device of household electrical appliance of the present utility model can prevent because of unexpected when disconnected power-off cause the voltge surge of household electrical appliance, thereby protection electric equipment is avoided infringement, extends the useful life of electric equipment.
Description
Technical field
The utility model relates to a kind of calling protection device of household electrical appliance.
Background technology
The safety of household electrical appliance is very important for one family.There is sometimes transient fault or cause the unexpected power-off of user because maintenance waits in electric power system, then pass through the situation that the short time switches on again in application process.For example, during small current neutral grounding system generation single phase ground fault, or when the La Lu of electric company searches ground path, electric power system transient fault, through Power System Automation Equipment, recover the voltge surge that such situations such as power transmission can cause household electrical appliance, damage the useful life of electric equipment or shortening electric equipment.
Utility model content
Problem to be solved in the utility model is how to prevent from weighing the compression shock that power transmission causes household electrical appliance after Power system fault restoration, and a kind of calling protection device of household electrical appliance of the impact that can ease off the pressure is provided.
In order to address the above problem; the utility model provides a kind of calling protection device of household electrical appliance; comprise: power supply indicator, load power source repeater lamp, can turn-off formula bidirectional triode thyristor, polarity free capacitor, the first resistance, the second resistance, normal open switch, normally closed switch and load; the calling protection utensil of described household electrical appliance has the first electronic circuit and the second electronic circuit; wherein
Described power supply indicator is connected between live wire and zero line,
The first electronic circuit comprises and is serially connected with successively described the first resistance between live wire and zero line, described normal open switch and described polarity free capacitor;
The second electronic circuit comprises described formula bidirectional triode thyristor, described the second resistance, described normally closed switch and the described polarity free capacitor of turn-offing being serially connected with successively between live wire and zero line, the described anode that turn-offs formula bidirectional triode thyristor is connected with live wire, and the described trigger electrode that turn-offs formula bidirectional triode thyristor is connected with zero line by described polarity free capacitor;
Described load and described load power source repeater lamp are connected to described can shutoff between the negative electrode and zero line of formula bidirectional triode thyristor.
As preferably, the calling protection device of household electrical appliance also comprises fuse.
As preferably; the calling protection device of household electrical appliance also comprises: the 3rd resistance and the 4th resistance; the 3rd resistance and power supply indicator are serially connected between live wire and zero line, and the 4th resistance and load power source repeater lamp are serially connected between the negative electrode and zero line that can turn-off formula bidirectional triode thyristor.
As preferably, the 3rd resistance and the 4th resistance are 100K.
As preferably, the first resistance is identical with the resistance of the second resistance.
As preferably, can turn-off the withstand voltage of formula bidirectional triode thyristor for exchanging 800V.
As preferably, power supply indicator and load power source repeater lamp are light-emitting diode.
As preferably, the capacitance of polarity free capacitor is 1 μ F, and withstand voltage is for exchanging 400V.
The utility model is with respect to the beneficial effect of prior art:
1, prevent because of unexpected when disconnected power-off cause the voltge surge of household electrical appliance, thereby protection electric equipment is avoided infringement, extends the useful life of electric equipment.
2, cost is low, noise is little, for the unexpected calling protection of household electrical appliance, have more practical meaning.Can be for the protection of the unexpected incoming call of various household electrical appliance.
Accompanying drawing explanation
Fig. 1 is according to the shell of the calling protection device of the household electrical appliance of an embodiment of the present utility model;
Fig. 2 is the circuit diagram of the calling protection device inside of the household electrical appliance shown in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, to of the present utility model, be described in detail.
According to embodiment of the present utility model; a kind of calling protection device of household electrical appliance is provided; it comprises: power supply indicator (preferably adopting light-emitting diode), load power source repeater lamp (preferably adopting light-emitting diode), can turn-off formula bidirectional triode thyristor, polarity free capacitor, the first resistance, the second resistance, normal open switch, normally closed switch and load; wherein; power supply indicator is connected between live wire and zero line; while recovering after electric power system fault; calling protection device obtains electric; power supply indicator is bright
The first electronic circuit, it comprises the first resistance, normal open switch and the polarity free capacitor being serially connected with successively between live wire and zero line, when normal open switch is closed, polarity free capacitor is in charged state;
The second electronic circuit, it comprises turn-offed formula bidirectional triode thyristor, the second resistance, normally closed switch and the polarity free capacitor being serially connected with successively between live wire and zero line, the anode that can turn-off formula bidirectional triode thyristor is connected with live wire, and the trigger electrode that can turn-off formula bidirectional triode thyristor is connected with zero line by polarity free capacitor;
Load and load power source repeater lamp are connected between the negative electrode and zero line that can turn-off formula bidirectional triode thyristor.Whether load power source repeater lamp is used for marking aobvious load in there being electricity condition.
As preferably, the calling protection device of household electrical appliance can also comprise fuse, fuses, thereby the circuit of calling protection device is shielded the in the situation that electric current being excessive in circuit.
As preferably; the calling protection device of household electrical appliance also comprises: the 3rd resistance and the 4th resistance; the 3rd resistance and power supply indicator are serially connected between live wire and zero line, and the 4th resistance and load power source repeater lamp are serially connected between the negative electrode and zero line that can turn-off formula bidirectional triode thyristor.
As preferably, the 3rd resistance and the 4th resistance are 100K, and the resistance of power supply indicator and load power source repeater lamp also can be identical.The first resistance and the second resistance play dividing potential drop protective effect to power supply indicator and load power source repeater lamp respectively.
As preferably, the first resistance is identical with the resistance of the second resistance, and the first resistance and the second resistance play dividing potential drop protective effect to normal open switch and normally closed switch respectively.
As preferably, can turn-off the withstand voltage of formula bidirectional triode thyristor for exchanging 800V.As preferably, the capacitance of polarity free capacitor is 1 μ F, and withstand voltage is for exchanging 400V.
Be to be understood that; the design parameter size about each element mentioned in literary composition is schematically; when using according to calling protection device of the present utility model, can select according to the load of household electrical appliance or the size of other parameter the different parameters value of each element.
According to an embodiment of the present utility model; a kind of calling protection device of household electrical appliance is provided; be illustrated in figure 1 according to the shell of the calling protection device of an embodiment of the present utility model, shell is marked with power supply indicator and load indicator light, and start button and stop button.Fig. 2 is the circuit diagram of the calling protection device inside of the household electrical appliance shown in Fig. 1, the inner member of this calling protection device mainly comprises: fuse FU, power supply indicator D (employing LED), load power source repeater lamp F (employing LED), (ac resistance is pressed 800 volts can to turn-off formula bidirectional triode thyristor W, be designated hereinafter simply as controllable silicon W), polarity free capacitor C (1 μ F/400V, be that capacitance is 1 microfarad, ac resistance is pressed 400V), two resistance R (correspond respectively to the 3rd resistance and the 4th resistance in literary composition, both are 100K at resistance, ), resistance R 1 and resistance R 2 (corresponding the first resistance of difference and the second resistance, R1 is identical with the resistance of R2), normal open switch SB1 is (corresponding to start button, when start button is pressed, SB1 becomes closure state by normally open), normally closed switch SB2 is (corresponding to stop button, when stop button is pressed, SB2 becomes off-state from normally off) and load RL.
Wherein, annexation is: the 3rd resistance R and power supply indicator D are serially connected between live wire and zero line, fuse FU is connected between live wire and the anode of controllable silicon W, the first electronic circuit comprises the first resistance R 1 being serially connected with successively between live wire and zero line, normal open switch SB1 and polarity free capacitor C, the second electronic circuit, it comprises the turn-offed formula bidirectional triode thyristor being serially connected with successively between live wire and zero line, the second resistance, normally closed switch and polarity free capacitor, the anode that can turn-off formula bidirectional triode thyristor is connected with live wire, the trigger electrode that can turn-off formula bidirectional triode thyristor is connected with zero line by polarity free capacitor, wherein, the trigger electrode of controllable silicon W is connected to unearthed one end of polarity free capacitor C, load RL, the 4th resistance R and load power source repeater lamp F are connected between the negative electrode and zero line of controllable silicon W.
Below introduce the course of action of circuit of the calling protection device of the present embodiment, the operating principle of paper controllable silicon W.Generally, the live wire of the anodic bonding power supply of controllable silicon W, negative electrode connects the zero line of power supply, and trigger electrode (namely controlling the utmost point) connects miscellaneous part.When trigger electrode is not charged, the anode of controllable silicon W and not conducting of negative electrode.When trigger electrode is charged, the anode of controllable silicon W and negative electrode are with regard to conducting.
1) start-up course of circuit is: between L～N during normal power supply, circuit is normally charged, power supply indicator D is bright, press start button, normal open switch SB1 is closed, and capacitor C is charged, and controllable silicon W trigger electrode is charged, controllable silicon W conducting, path now (comprising the first electronic circuit) is: positive source L-fuse FU-resistance R 1-button SB1-capacitor C-power cathode N.Now by cathode power supply L, fuse FU, controllable silicon W, resistance R 2, button SB2, capacitor C, power cathode N, make silicon controlled anode and negative electrode keep conducting state, path now (comprising the second electronic circuit) is: positive source L-fuse FU-controllable silicon W-resistance R 2-stop button SB2-capacitor C-power cathode N.
2) the manual stopped process of circuit: during normal operation circuit, power supply indicator D is bright, manually press stop button, switch S B2 disconnects, capacitor C moment dead electricity, the trigger electrode dead electricity of while controllable silicon W, controllable silicon W is out of service, electric power loop is closed, load-side power supply dead electricity, load power source indicator light F lamp goes out, the RL of load simultaneously dead electricity.
3) normal course of operation of circuit, when crossing other reasons and cause after power cut-off suddenly incoming call because of the electric power system system failure, power supply indicator D is bright, can turn-off formula controllable silicon trigger electrode not charged, therefore not conducting of controllable silicon W, load RL is still in power failure state, must manually press start button and make load RL charged while restoring electricity as need, and now load indicator light F is bright.So just guaranteed that the impulse current of power supply is very large, can cause the damaging impact of household electrical appliance, the device damage that can avoid household electrical appliance to cause because of rush of current according to calling protection device of the present utility model at the power system recovery power supply initial stage.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection range of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection range, this modification or be equal to replacement and also should be considered as dropping in protection range of the present utility model.
Claims (8)
1. the calling protection device of household electrical appliance; it is characterized in that; comprise: power supply indicator, load power source repeater lamp, can turn-off formula bidirectional triode thyristor, polarity free capacitor, the first resistance, the second resistance, normal open switch, normally closed switch and load; the calling protection utensil of described household electrical appliance has the first electronic circuit and the second electronic circuit; wherein
Described power supply indicator is connected between live wire and zero line,
The first electronic circuit comprises and is serially connected with successively described the first resistance between live wire and zero line, described normal open switch and described polarity free capacitor;
The second electronic circuit comprises described formula bidirectional triode thyristor, described the second resistance, described normally closed switch and the described polarity free capacitor of turn-offing being serially connected with successively between live wire and zero line, the described anode that turn-offs formula bidirectional triode thyristor is connected with live wire, and the described trigger electrode that turn-offs formula bidirectional triode thyristor is connected with zero line by described polarity free capacitor;
Described load and described load power source repeater lamp are connected to described can shutoff between the negative electrode and zero line of formula bidirectional triode thyristor.
2. the calling protection device of household electrical appliance according to claim 1, is characterized in that, also comprises fuse.
3. the calling protection device of household electrical appliance according to claim 1; it is characterized in that; also comprise: the 3rd resistance and the 4th resistance; described the 3rd resistance and described power supply indicator are serially connected between live wire and zero line, and described the 4th resistance and described load power source repeater lamp are serially connected in described can shutoff between the negative electrode and zero line of formula bidirectional triode thyristor.
4. the calling protection device of household electrical appliance according to claim 3, is characterized in that, described the 3rd resistance and the 4th resistance are 100K.
5. the calling protection device of household electrical appliance according to claim 1, is characterized in that, described the first resistance is identical with the resistance of the second resistance.
6. the calling protection device of household electrical appliance according to claim 1, is characterized in that, the described withstand voltage that turn-offs formula bidirectional triode thyristor is for exchanging 800V.
7. the calling protection device of household electrical appliance according to claim 1, is characterized in that, described power supply indicator and described load power source repeater lamp are light-emitting diode.
8. the calling protection device of household electrical appliance according to claim 1, is characterized in that, the capacitance of described polarity free capacitor is 1 μ F, and withstand voltage is for exchanging 400V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420444353.6U CN203984378U (en) | 2014-08-07 | 2014-08-07 | The calling protection device of household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420444353.6U CN203984378U (en) | 2014-08-07 | 2014-08-07 | The calling protection device of household electrical appliance |
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| Publication Number | Publication Date |
|---|---|
| CN203984378U true CN203984378U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420444353.6U Active CN203984378U (en) | 2014-08-07 | 2014-08-07 | The calling protection device of household electrical appliance |
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| Country | Link |
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| CN (1) | CN203984378U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946954A (en) * | 2019-04-01 | 2019-06-28 | 科华恒盛股份有限公司 | Voltage buffer circuit, equipment and its control method |
-
2014
- 2014-08-07 CN CN201420444353.6U patent/CN203984378U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946954A (en) * | 2019-04-01 | 2019-06-28 | 科华恒盛股份有限公司 | Voltage buffer circuit, equipment and its control method |
| CN109946954B (en) * | 2019-04-01 | 2022-03-11 | 科华恒盛股份有限公司 | Voltage buffer circuit, device and control method thereof |
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