CN2382156Y - Overvoltage protector for household electric appliances - Google Patents
Overvoltage protector for household electric appliances Download PDFInfo
- Publication number
- CN2382156Y CN2382156Y CN 99221165 CN99221165U CN2382156Y CN 2382156 Y CN2382156 Y CN 2382156Y CN 99221165 CN99221165 CN 99221165 CN 99221165 U CN99221165 U CN 99221165U CN 2382156 Y CN2382156 Y CN 2382156Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- voltage stabilizing
- electric appliances
- over
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an over-voltage protector for household electric appliances. The device is composed of a voltage stabilizing circuit, a sample circuit, a switch amplification control circuit and a time delay circuit. The over-voltage protector is characterized in that the sample circuit in the device samples by utilizing diodes and resistors to be bridged between commercial power and the voltage stabilizing circuit; the over-voltage power-down range can be arbitrarily adjusted. The utility model has the advantages of high sensitivity and simple structure, and is an ideal over-voltage protecting means for the household electric appliances.
Description
The utility model relates to a kind of over voltage protection device of household electrical appliance.
Low-voltage supply line all is one zero power supplies of three fire; Owing to multiple reason, such as: faults such as blowing, rain, magnet-wire, thunder and lightning, neutral line break, zero line joint are loosening; Make user's voltage Meng Sheng, can reach 330-360V, colour TV, refrigerator, air-conditioning and all household electrical appliance well damages; Making family lose ginseng economically weighs.A lot of for this reason humans common " automatic voltage regulator ", " voltage regulator " are wanted to address this problem; But owing to the reason on common " automatic voltage regulator ", " voltage regulator " performance; Can't resolve.For example: common " automatic voltage regulator " do not have the overpressure protection function; Input voltage more than 300 volt outputs are more than 300 volts still; So (360V) household electrical appliance were still burnt out as usual when voltage raise! For another example: common " pressurizer ", " voltage regulator " that have have the overpressure protection function; But because the highest withstand voltage 270V own; When voltage raise, about 360V can only protect seven or eight minutes; Long again self burning out of time.Situation is self-evident later on.
The purpose of this utility model is that a kind of circuit novel structure of design is ingenious, the family expenses over voltage protection device of reliable operation, and this device working voltage scope can widely reach the automatic superpressure outage of 150V-250V; Proof voltage is up to 400V, a kind of desirable protector of function such as low in energy consumption.
The purpose of this utility model is achieved in that this utility model is by voltage stabilizing circuit, the switch amplification control circuit, delay circuit constitutes, between voltage stabilizing circuit and switch amplification control circuit, a sample circuit is arranged, this sample circuit is in series by second tube sheet and two resistance, wherein the anode of diode connects with an end of civil power, and an end of a resistance and the negative terminal of voltage stabilizing circuit join, and the input of the tie point of two resistance and switch amplification control circuit links.According to this sample circuit, the height of superpressure outage voltage can be set arbitrarily.
The utility model has been owing to adopted novel sample circuit, makes simple in structurely, and reliable operation is a kind of desirable automatic superpressure power-off protection apparatus.
The course of work of the present utility model and principle can be illustrated with reference to accompanying drawing.
Accompanying drawing 1 is a circuit structure schematic diagram of the present utility model.
By accompanying drawing 1 as can be known, this device comprises by voltage stabilizing circuit 1, switch amplification control circuit 3 and delay circuit 4 constitute, between voltage stabilizing circuit 1 and switch amplification control circuit 3, add sample circuit 2, this sample circuit 2 is composed in series by diode D6, resistance R 3 and R4, one end of the positive termination civil power of D6, an end of the switch amplifying circuit in the tie point of resistance R 3 and R4 and the switch amplification control circuit 3 joins.The other end of resistance R 4 is connected with the negative terminal of voltage stabilizing circuit 1.
The course of work of the present utility model and principle are as follows: civil power is through capacitor C 1 step-down, and through the D1-D4 bridge rectifier, resistance R 2 stops surge voltage, and again through the D5 voltage stabilizing, C2 filtering obtains stablizing 24V powered by direct current road and uses.
User's voltage just often; Sample circuit D6, R3, R4, B point are electronegative potential, and switch amplifying circuit 4 pin are electronegative potential simultaneously; Transistor BG1 base stage can not get electricity and ends; Relay J 1 not adhesive.Civil power outputs to J2 normally opened contact time-delay J2 adhesive in minute output normally through the J1 normally-closed contact.
When civil power raises; The 4 pin voltages that B point current potential rises in switch amplifying circuit 3 are high potential; BG1 gets electric saturation conduction J1 adhesive and cuts off civil power.
BG2, R8, R9, D7, C5, C4, J2 form delay circuit; Civil power just often C point is that high potential 24V makes D7 puncture conducting to charge to C5 through resistance, the C5 capacity big after a period of time electricity be full of; Positive plate is upgraded to high potential BG2 and gets electric saturation conduction J2 adhesive; Civil power output is normal.
Claims (1)
1; a kind of voltage stabilizing circuit 1 that includes; the household electrical appliance overpressure protector that switch amplification control circuit 3 and delay circuit 4 are constituted; it is characterized in that between voltage stabilizing circuit 1 and switch amplification control circuit 3, adding a sample circuit 2; this sample circuit 2 is composed in series by diode D6, resistance R 3 and R4; one end of the positive termination civil power of D6,1 end of switch amplifying circuit joins in the tie point of resistance R 3 and R4 and the switch amplification control circuit 3, and the negative terminal of the other end of resistance R 4 and voltage stabilizing circuit 1 joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99221165 CN2382156Y (en) | 1999-06-07 | 1999-06-07 | Overvoltage protector for household electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99221165 CN2382156Y (en) | 1999-06-07 | 1999-06-07 | Overvoltage protector for household electric appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382156Y true CN2382156Y (en) | 2000-06-07 |
Family
ID=34011784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99221165 Expired - Fee Related CN2382156Y (en) | 1999-06-07 | 1999-06-07 | Overvoltage protector for household electric appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382156Y (en) |
-
1999
- 1999-06-07 CN CN 99221165 patent/CN2382156Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |