CN2200270Y - Electrothermal blanket capable of preventing electromagnetic induction - Google Patents
Electrothermal blanket capable of preventing electromagnetic induction Download PDFInfo
- Publication number
- CN2200270Y CN2200270Y CN 94244511 CN94244511U CN2200270Y CN 2200270 Y CN2200270 Y CN 2200270Y CN 94244511 CN94244511 CN 94244511 CN 94244511 U CN94244511 U CN 94244511U CN 2200270 Y CN2200270 Y CN 2200270Y
- Authority
- CN
- China
- Prior art keywords
- electric blanket
- screen
- power supply
- electromagnetic induction
- heater strip
- 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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- Control Of Resistance Heating (AREA)
Abstract
The utility model introduces an electric blanket with electromagnetic induction prevention function. The utility model is composed of an electric blanket and a controller, wherein, electric heating wires arranged in the electric blanket are composed of inner core wires, heating wires, an inner insulating layer, a shielding layer and an outer insulating layer; heating wires are connected with a neutral conductor and a phase conductor of a power supply; one end of the shielding layer is connected with neutral conductor ends of the heating wires, and the other end of the shielding layer is connected with a test circuit; the test circuit is composed of a resistor, a luminotron, a controlled silicon and a neon tube, wherein, the neon tube is connected in series between the shielding layer and a controlled silicon control electrode; a heating wire power supply circuit and the test circuit are respectively connected with a double pole multithrow switch and are mutually unattached. When the power supply provides electricity for the heating wires and the shielding layer is correctly connected with the neutral conductor, the shielding layer has shielding function.
Description
The utility model relates to a kind of electric blanket of safe, reliable, anti-electromagnetic induction.
Electric blanket is quite universal as the domestic electric heating product, although electric blanket has experienced and regenerated for several times and improve, does not also see the electric blanket that prevents electromagnetic induction at present and appears on the market.
A kind of measure of anti-electromagnetic induction is arranged in the prior art, is plating one deck conducting film on heating wire, with film ground connection, but because the limitation that conducting film exists in producing use, not seeing so far has similar products to put on market.
In view of the problem that above-mentioned electric blanket in use exists, the purpose of this utility model is a kind of safe in utilization, reliable, electric blanket that can effectively prevent electromagnetic induction of design.
The technical measures that the utility model is taked have reached above-mentioned purpose, and it is made up of electric blanket and controller, and totally five layers of the heating wire in the electric blanket are respectively internal core wire, heater strip, inner insulating layer, screen and external insulation layer from inside to outside.Heater strip is connected between the power supply neutral line and the phase line, controller is made of testing circuit and heater strip power supply circuits, be connected on the power supply neutral line after it is characterized in that heater strip one end and screen being connected, another termination power phase line of heater strip, another termination testing circuit of screen, testing circuit is by resistance, luminous tube, controllable silicon and neon tube and screen constitute, resistance, luminous tube and controllable silicon series connection, neon tube is serially connected between the SCR control utmost point and the screen, testing circuit and heater strip power supply circuits link with a double-pole multithrow switch respectively, thereby constitute two circuit independent of each other.
Above-mentioned screen can adopt sufficiently long wire to be wound on the inner insulating layer, and for testing circuit, the screen wire is then as the line of induction.
Anti-electromagnetic induction electric blanket with said structure characteristics, owing to be provided with the electromagnetic induction screen, make when energising flow into electrical network at the inboard charge inducing that produces of screen through screen, make the human body can induction charging on the energising electric blanket at the alternating magnetic field that heating wire produces.
The power line of this anti-electromagnetic induction electric blanket adopts the two poles of the earth plug, and the setting of testing circuit is in order to make power supply when heater strip is powered, and screen correctly connects to neutral.Its operation principle is the SCR control utmost point and be connected with screen after neon tube links to each other again, this moment, screen was as the line of induction, because its long enough, the parasitic capacitance that forms with the ambient body is big, when the power supply phase line inserts the controllable silicon negative electrode, makes the neon tube both end voltage reach its starting voltage, the neon tube build-up of luminance, the controllable silicon conducting, luminous tube is luminous, and it is correct to show that power supply screen when heater strip is powered has correctly connect neutral line plug direction this moment.When the power supply neutral line inserted the controllable silicon negative electrode, the neon tube both end voltage did not reach starting voltage, SCR control utmost point triggerless electric current, and controllable silicon ends, and luminous tube is not luminous, shows power supply when heater strip is powered, and screen does not connect to neutral and plug instead should be inserted.
Anti-electromagnetic induction electric blanket with the utility model architectural feature is particularly suitable for special populations such as pregnant woman, child and uses.
Further specify the utility model below in conjunction with accompanying drawing:
Fig. 1 heating wire five-layer structure
Fig. 2 electric blanket controller circuitry figure
Heating wire is made of internal core wire (1), heater wire (2), inner insulating layer (3), screen (4) and external insulation layer (5), internal core wire adopts high-strength insulating material, alloy heater strip (2) helically coiling is on internal core wire (1), on inner insulating layer (3), outermost layer is external insulation layer (5) to screen by wire (4) helically coiling.
K is that double-pole is thrown mains switch more on the figure, joins with heater strip power supply circuits and testing circuit respectively, makes the two independently of one another.R1, LED1, LED2 and D and BX constitute the heater strip high-low pressure and select power supply circuits, and RL is an electric blanket, and LED1 is green, and coupled shelves are low-voltage, and LED2 is red, and coupled is high voltage.A point on the electric blanket line constitutes testing circuit for the heater strip neutral line that is connected with screen, R2, LED3, SCR and neon tube N, and neon tube N is serially connected with SCR and controls between the utmost point and the screen.The terminal 1～2 that links to each other with K switch is the two poles of the earth plug, connects civil power.When the 1 termination neutral line, during 2 termination phase lines, starting voltage is arranged on the neon tube, provide trigger current to SCR, LED3 shows power supply when heater strip is powered because of the SCR conducting light that turns to be yellow, and screen has connect the neutral line, and this moment, electric blanket was in correct user mode;
When 1 termination phase line, during the 2 termination neutral lines, neon tube N goes up no starting voltage, and controllable silicon SCR is ended, and LED3 does not work, and shows power supply when heater strip is powered, and screen is failed operate as normal, and the user should anti-plug-in source plug at this moment.
Claims (6)
1, a kind of anti-electromagnetic induction electric blanket, form by electric blanket and controller, totally five layers of heating wires in the electric blanket, be respectively internal core wire from inside to outside, heater strip, inner insulating layer, screen and external insulation layer, heater strip links to each other with phase line with the power supply neutral line, controller is made of testing circuit and heater strip power supply circuits, it is characterized in that the heater strip neutral terminal links to each other with screen one end, another termination testing circuit of screen, testing circuit is by resistance, luminous tube, controllable silicon and neon tube and screen constitute, resistance, luminous tube, the controllable silicon series connection, neon tube is serially connected with between the SCR control utmost point and the screen, the heater strip power supply circuits link to each other with a double-pole multithrow switch respectively with testing circuit, constitute circuit independent of each other, and the double-pole multithrow switch is connected with the two poles of the earth plug.
2, according to the described anti-electromagnetic induction electric blanket of claim 1, it is characterized in that the heater strip power supply circuits are that a high-low pressure is selected power supply circuits, and serial connection one protective tube in the loop.
3, according to the described anti-electromagnetic induction electric blanket of claim 1, it is characterized in that screen by sufficiently long wire helically coiling on inner insulating layer.
4, it is characterized in that according to the described anti-electromagnetic induction electric blanket of claim 1 screen not only done screen but also done sensing element in the detection line.
5, it is characterized in that according to the described anti-electromagnetic induction electric blanket of claim 1 controller has the power phase detection line.
6, it is characterized in that only using the two poles of the earth plug according to the described anti-electromagnetic induction electric blanket of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94244511 CN2200270Y (en) | 1994-11-10 | 1994-11-10 | Electrothermal blanket capable of preventing electromagnetic induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94244511 CN2200270Y (en) | 1994-11-10 | 1994-11-10 | Electrothermal blanket capable of preventing electromagnetic induction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200270Y true CN2200270Y (en) | 1995-06-07 |
Family
ID=33850557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94244511 Expired - Fee Related CN2200270Y (en) | 1994-11-10 | 1994-11-10 | Electrothermal blanket capable of preventing electromagnetic induction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200270Y (en) |
-
1994
- 1994-11-10 CN CN 94244511 patent/CN2200270Y/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 |