CN2348512Y - Electronic protecting device for domestic electrical equipment - Google Patents
Electronic protecting device for domestic electrical equipment Download PDFInfo
- Publication number
- CN2348512Y CN2348512Y CN 98244185 CN98244185U CN2348512Y CN 2348512 Y CN2348512 Y CN 2348512Y CN 98244185 CN98244185 CN 98244185 CN 98244185 U CN98244185 U CN 98244185U CN 2348512 Y CN2348512 Y CN 2348512Y
- Authority
- CN
- China
- Prior art keywords
- piezo
- resistance
- electrical equipment
- utility
- model
- 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 electronic protection device for domestic electrical equipment. The protection device is composed of two protection pipes and a varistor. The two protection pipes are respectively connected in series in the circuit of an input end. The varistor is connected in parallel at the output ends of the two protection pipes. The utility model has the advantages of simple structure, low production cost, etc.
Description
The utility model relates to a kind of household electrical appliance electronic insurance device, and it belongs to Protector for electric appliances.
Existing household electrical appliance generally all are not provided with anti-lightning strike, overvoltage (surging) protective device, therefore, in case meet the thunderbolt or the overvoltage of surging, household electrical appliance all can produce damage in various degree.For this reason, people have worked out multiple anti-lightning strike, overvoltage protector, as CN2133084Y and the disclosed protector of CN2199581Y.Though these protectors can play anti-lightning strike and overvoltage protection,, therefore exist shortcomings such as complex structure, cost height because these protector electronic components are many.
The purpose of this utility model provide a kind of simple in structure, cost is low and can effectively prevent household electrical appliance from meeting thunderbolt, overvoltage and produce the household electrical appliance electronic insurance device of damage.
Task of the present utility model is achieved in that this protector is made up of two protective tubes and piezo-resistance, and two protective tubes are connected on respectively in the circuit of input, and piezo-resistance is connected in parallel on the output of two protective tubes.
Because the electric conductivity of piezo-resistance is nonlinear change with the change of applied voltage, when the piezo-resistance both end voltage is lower than its nominal voltage, its inside is open circuit, high-impedance state, any influence is not taken place external circuit, and when voltage was higher than nominal value, its inside took place in the response time of the nanosecond order of magnitude sharply to descend, become low-resistance rapidly, make the moment thunder and lightning, the overvoltage of surging releases by piezo-resistance.And owing to be serially connected with protective tube in the piezo-resistance prime, and the big electric current quick fuse insurance when releasing, thus protect household electrical appliance to exempt from thunderbolt and overvoltage effectively.Therefore, compare with background technology, have simple in structure, production cost is low and can effectively protect advantages such as household electrical appliance.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of the another embodiment of the utility model.
As shown in Figure 1, the utility model is by two protective tube F
1, F
2Form two protective tube F with a piezo-resistance ZNR
1And F
2Be connected on respectively in the circuit of input, piezo-resistance ZNR is connected in parallel on two protective tube F
1And F
2Output.1,2 ends are input among the figure, and 3,4 ends are output.
Protector in the present embodiment is in the power supply input of polarity not, load not and when perception is arranged and electric current be not more than under the condition of 5A and use.
As shown in Figure 2, present embodiment is by two protective tube F
1, F
2With two piezo-resistance ZNR
1, ZNR
2Form two protective tube F
1And F
2Be connected in the circuit of input piezo-resistance ZNR respectively
1, ZNR
2Be connected in parallel on two protective tube F
1And F
2Output.1,2 ends are input among the figure.3,4 ends are output.
Protector in the present embodiment uses when load has perception, under the condition of electric current greater than 5A.This moment protective tube F
1And F
2Use has the protective tube of time-delay characteristics.
The course of work of the present utility model is: when supply voltage was higher than 220V, the nominal value height of the voltage ratio piezo-resistance ZNR of 1,2 inputs made piezo-resistance be in low resistive state at this moment, electric current moment increase, fusing protective tube F
1Or F
2, causing dump, 3,4 end no-outputs have been protected household electrical appliance.
Claims (1)
1, a kind of household electrical appliance electronic insurance device, it is made up of two protective tubes and piezo-resistance, it is characterized in that: two protective tubes are connected on respectively in the circuit of input, and piezo-resistance is connected in parallel on the output of two protective tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98244185 CN2348512Y (en) | 1998-09-15 | 1998-09-15 | Electronic protecting device for domestic electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98244185 CN2348512Y (en) | 1998-09-15 | 1998-09-15 | Electronic protecting device for domestic electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2348512Y true CN2348512Y (en) | 1999-11-10 |
Family
ID=33990381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98244185 Expired - Fee Related CN2348512Y (en) | 1998-09-15 | 1998-09-15 | Electronic protecting device for domestic electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2348512Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826910A (en) * | 2016-04-25 | 2016-08-03 | 北京先研科技有限责任公司 | Financial automatic teller machine (ATM) power source and special lightning protection device for communication system |
-
1998
- 1998-09-15 CN CN 98244185 patent/CN2348512Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826910A (en) * | 2016-04-25 | 2016-08-03 | 北京先研科技有限责任公司 | Financial automatic teller machine (ATM) power source and special lightning protection device for communication system |
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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 |