CN200941731Y - Shielder for electromagnetic wave - Google Patents
Shielder for electromagnetic wave Download PDFInfo
- Publication number
- CN200941731Y CN200941731Y CN 200620119181 CN200620119181U CN200941731Y CN 200941731 Y CN200941731 Y CN 200941731Y CN 200620119181 CN200620119181 CN 200620119181 CN 200620119181 U CN200620119181 U CN 200620119181U CN 200941731 Y CN200941731 Y CN 200941731Y
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- CN
- China
- Prior art keywords
- electromagnetic wave
- power supply
- terminal
- supply terminal
- computer
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- 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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Abstract
The utility model relates to an electromagnetic wave shield device, in particular to an electromagnetic wave shield device used for the grounding position of various household appliances such as the computer and the computer's peripheries and household electric products which comprises: a switch, which detects the voltage of a first power supply terminal L1 and a second power supply terminal L2 in turn; a voltage reduction device, which is connected to the two ends of the first power supply terminal L1 and the second power supply terminal L2 to make the voltage drop; a grounding terminal, which earths the electromagnetic wave produced by the electrical appliances; a over-current protection element, which blocks the over-current to flow into the grounding terminal; a ground wire identifier: identifies if the ground wire exists. The electromagnetic wave shield device of the utility model is applicable to the electrical appliances that need to be earthed (irrespective of the input power supply) but are difficult to realize, effectively shields the electromagnetic waves and static electricity harmful to the human body, and makes people get rid of various video display terminals(VDT)arising from the computer at the same time.
Description
Technical field
The utility model relates to electromagnetic wave shielding device, is a kind of electromagnetic wave shielding device that is applicable to the ground connection position of various electrical equipment such as computer, computer peripheral and household electronic products concretely.
Background technology
The power supply of family or office is divided into single-phase TW two wire and single-phase three-wire formula.In single-phase TW two wire power supply, the current potential of a line several (Ground, the earth) near the ground current potential wherein, and another line is as the criterion with ground potential, reaches 110V or 220V usually.
Single-phase three-wire formula power supply is made up of the current potential of ground potential and all the other two wires independently, selects 110V and 220V voltage respectively for use according to electrically connected method.
Usually generating electromagnetic waves, is display and video screen (hereinafter to be referred as " display ") mostly, causes vision disorder in order to prevent intense light and various unwanted electromagnetic wave that display discharges, and people use eye protector to come vision protection.
Computer not only, power devices such as display, keyboard, printer, mouse, scanner can generate electromagnetic waves and static, and all household electronic products (hereinafter to be referred as " household appliances ") such as television set, refrigerator, washing machine, microwave oven, sound equipment, hair-dryer, ligthing paraphernalia, electric iron, VTR, cleaner, electric heater, electric blanket, air purifier, humidifier, juice extractor, massager, exercise also can generate electromagnetic waves.
For this reason, people install expensive eye protector on television set or computer, but but can not find the place that is fit to ground connection in the practical application, and most of household appliances do not carry out ground ground connection again, therefore can not shield the electromagnetic wave that electrical equipment produces effectively.
In order to address these problems, developed a kind of controller of shielding electromagnetic wave at present, in the power supply of family or office, find the current potential of similar ground potential to carry out ground connection (virtual ground)., people have but ignored best earthing mode-ground ground connection.
Also having a kind of mode is to utilize rainbow (Neon) transducer, and the voltage between the input power supply is compared, and selects electronegative potential wherein to carry out ground connection.But the shortcoming of rainbow (Neon) transducer is, its discharge voltage is different with blocking voltage, and the inherent characteristic difference of each transducer, so, cause malfunction, be grounded with high potential, strengthen electromagnetic wave on the contrary.
Summary of the invention
In order to address the above problem, the purpose of this utility model is, a kind of electromagnetic wave shielding device is provided, in order to shield the electromagnetic wave that each electric appliances produces.This electromagnetic wave shielding device is only by simple manual operation and utilize the ground wire identifier to discern, realize the ground connection of safety, even also be grounded easily in place that can't ground connection, the electromagnetism that is produced with shielding electrical equipment (computer and ancillary equipment thereof and household appliances) involves static, simultaneously, help people to break away from the various syndromes that computer causes.
In order to achieve the above object, the utility model provides a kind of electromagnetic wave shielding device, it is characterized in that, is made up of following components: switch, detect first power supply terminal, the voltage of second source terminal successively; Decompression device is connected to first power supply terminal, and the two ends of second source terminal descend voltage; Earth terminal carries out ground connection to the electromagnetic wave that electrical equipment produced; The overcurrent protection part, the blocking-up overcurrent flows into earth terminal; Ground wire identifier: be used to discern ground wire, whether exist with the identification ground wire.
The beneficial effects of the utility model are, by simple manual operation and utilize the ground wire identifier to discern, realize the ground connection of safety.Not only shielded the electromagnetism that electrical equipment (computer and ancillary equipment thereof and household appliances) produced and involved static, simultaneously, allowed people break away from the various syndromes that computer causes.Even also be easy to be grounded in place that can't ground connection.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the workflow diagram of Fig. 1.
The reference numeral explanation:
Attaching plug 10 switches 20 indicator lights 30 of band earth terminal
Embodiment
Followingly the utility model is elaborated with reference to accompanying drawing:
Fig. 1 is a circuit diagram of the present utility model; Fig. 2 is the workflow diagram of Fig. 1.
Electromagnetic wave shielding device of the present utility model can shield electromagnetic waves that electrical equipment produced such as computer, computer peripheral and household electronic products.This electromagnetic wave shielding device is made up of following components:
Switch 20 detects the first power supply terminal L1 successively, the voltage of second source terminal L2; Decompression device 40 is connected to the first power supply terminal L1, and the two ends of second source L2 descend voltage; Earth terminal 60 carries out ground connection to the electromagnetic wave that electrical equipment produced; Overcurrent protection part 50, the blocking-up overcurrent flows into above-mentioned earth terminal 60; Ground wire identifier 70, whether the existence of identification ground wire.
The effect of above-mentioned decompression device 40 is: in single-phase three-wire formula power supply, during power supply, voltage is descended under having the situation of earth terminal, thereby catch its emphasis, simultaneously, utilize the first power supply terminal L1, out-phase between the second source terminal L2 two ends makes it become ground potential.
In the utility model, symbol 10 is attaching plugs of band earth terminal, the 30th, and indicator light.From the flow chart of Fig. 2, the earthing mode of electromagnetic wave shielding device of the present utility model is as follows:
Earlier the earth terminal 60 of electromagnetic wave shielding device is connected on the electrical equipment and (sees step S1).
In order to select earthing mode, forward switch 20 to behind the earthing position SW1 of ground energized.(seeing step S2)
When the ground wire identifier continues to send alarm sound, switch 20 is forwarded to other positions (SW2) (see step S3, S4).Also do not send alarm sound if the alarm lamp of ground wire identifier works, then ground ground connection has been carried out in expression.So, end operation under the situation of maintaining the statusquo.(seeing step S8)
If switch 20 is forwarded to SW2, ground wire identifier 70 still sends alarm sound, so, switch is forwarded to other positions (SW3) (see step S5, S6).If working, the alarm lamp of ground wire identifier do not send alarm sound yet; what then represent to connect on the power supply of single-phase TW two wire is power supply with ground potential; so decompression device 40 and overcurrent protection part 50 by being connected to SW2 absorb the electromagnetic wave that electrical equipment produced.So, end operation under the situation of maintaining the statusquo.(seeing step S8)
If switch 20 is forwarded to SW3, ground wire identifier 70 still sends alarm sound, so, switch is forwarded to other positions (SW4) (see step S7, S9).If working, the alarm lamp of ground wire identifier do not send alarm sound yet; what then represent to connect on the power supply of single-phase TW two wire is power supply with ground potential; so decompression device 40 and overcurrent protection part 50 by being connected to SW3 absorb the electromagnetic wave that electrical equipment produced.So, end operation under the situation of maintaining the statusquo.(seeing step S8)
If switch 20 is forwarded to SW4, ground wire identifier 70 still sends alarm sound, so, switch 20 is forwarded to SW2 once more (see step S3, S4), repeat aforesaid operations.If working, the alarm lamp of ground wire identifier do not send alarm sound yet; represent that then power supply is the single-phase three-wire formula; be connected to the first power supply terminal L1; catch emphasis on the decompression device 40 at second source terminal L2 two ends; as ground potential, absorb the electromagnetic wave that electrical equipment produced that carries out ground connection by overcurrent protection part 50 simultaneously.So, end operation under the situation of maintaining the statusquo.(seeing step S8)
In sum, the utility model is realized the ground connection of safety, thereby is made electromagnetic wave flow to ground potential by being fit to the shirtsleeve operation and the identification of supply power mode.
The beneficial effects of the utility model are, can use easily on the electrical equipment that needs ground connection but to be difficult to be grounded, by simple switching manipulation and ground wire identifier, whether the identification ground wire exists, simultaneously, find ground potential to carry out ground connection, electromagnetic wave, static and the leakage current etc. that are harmful to human body are flowed out by earth terminal, not only shielding electromagnetic wave and static effectively also allow people break away from the various syndromes (VDT) that computer causes.
Above embodiment only is used to use of the present utility model is described, is not to be used to limit protection range of the present utility model.
Claims (1)
1, a kind of electromagnetic wave shielding device is characterized in that, is made up of following components:
Switch (20) detects first power supply terminal (L1) successively, the voltage of second source terminal (L2);
Decompression device (40) is connected to first power supply terminal (L1), and the two ends of second source terminal (L2) descend voltage;
Earth terminal (60) carries out ground connection to the electromagnetic wave that electrical equipment produced;
Overcurrent protection part (50), the blocking-up overcurrent flows into earth terminal (60);
Ground wire identifier (70), the identification ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620119181 CN200941731Y (en) | 2006-08-22 | 2006-08-22 | Shielder for electromagnetic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620119181 CN200941731Y (en) | 2006-08-22 | 2006-08-22 | Shielder for electromagnetic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941731Y true CN200941731Y (en) | 2007-08-29 |
Family
ID=38747903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620119181 Expired - Fee Related CN200941731Y (en) | 2006-08-22 | 2006-08-22 | Shielder for electromagnetic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200941731Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190545A1 (en) * | 2013-05-31 | 2014-12-04 | Nokia Corporation | Method and apparatus for communication channel power reduction |
-
2006
- 2006-08-22 CN CN 200620119181 patent/CN200941731Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190545A1 (en) * | 2013-05-31 | 2014-12-04 | Nokia Corporation | Method and apparatus for communication channel power reduction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20120822 |