CN2200269Y - Electric heating blanket capable of preventing electromagnetic induction - Google Patents
Electric heating blanket capable of preventing electromagnetic induction Download PDFInfo
- Publication number
- CN2200269Y CN2200269Y CN 94244510 CN94244510U CN2200269Y CN 2200269 Y CN2200269 Y CN 2200269Y CN 94244510 CN94244510 CN 94244510 CN 94244510 U CN94244510 U CN 94244510U CN 2200269 Y CN2200269 Y CN 2200269Y
- Authority
- CN
- China
- Prior art keywords
- electromagnetic induction
- electric heating
- plug
- electric blanket
- wire
- 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)
- Resistance Heating (AREA)
Abstract
The utility model provides an electric heating blanket capable of preventing electromagnetic induction. An electric heating wire of the electric heating blanket is composed of an inner core, a heating wire, an inner insulating layer, a shielding layer and an outer insulating layer, wherein both ends of the heating wire are respectively connected to a phase line and a zero line of a tripolar power source plug, and a shielding wire is wound on the inner insulating layer; one end of the shielding wire is connected with the ground terminal of the power source plug by a safety tube, the other end of the shielding wire is suspended, and thus, the function of electromagnetic shield is performed. A control circuit of the electric heating blanket is composed of a power source direction circuit, a power regulation circuit and an overcurrent protector; a double-pole multi-throw switch and a commutation diode are respectively connected between two circuits and the phase line and between the two circuits and the zero line of the plug to form the power regulation circuit.
Description
The utility model relates to a kind of electric blanket of safe, comfortable, anti-electromagnetic induction.
Electric blanket is quite universal as the domestic electric heating product, regenerate for several times and improve although experienced, until now still not when energising is used human body not the electric blanket of induction charging ask the city.
In view of the above problems, task of the present utility model is that design is a kind of safe, reliable, and the electric blanket of anti-electromagnetic induction.
The technical measures that the utility model is taked have been finished above-mentioned design objective satisfactorily.The heating wire of this anti-electromagnetic induction electric blanket adopts the double-layer spiral structure, adopts the very high chemical fibre of intensity to make internal core wire, and heating wire is respectively internal core wire, heater strip, inner insulating layer, screen and external insulation layer from inside to outside.The power line of electric blanket adopts three-terminal polarized plus plug, and the heater strip two ends are connected on the phase line and the zero line side of three-terminal polarized plus plug respectively, and on inner insulating layer, the one end connects the earth terminal of three-terminal polarized plus plug by protective tube to screen by the wire helically coiling, and the other end is unsettled.When energized, because of producing the alternating electromagnetic field induction charging around the heater strip, this charge inducing all flows into the earth through the shielding silk on the screen, thereby guarantees that the human body on the electric blanket is not sensed charged.
The controller of forming this anti-electromagnetic induction electric blanket is made of power indicating circuit and power adjustments and current foldback circuit; a luminous tube is arranged in the power indicating circuit; the power adjustments function is finished by a rectifier diode; be connected a double-pole multithrow switch between the phase line of two circuit and attaching plug and the zero line side, between attaching plug and the heating wire and between screen and the attaching plug earth terminal protective tube arranged respectively.
This controller is when energising, and the luminous tube in the power indicating circuit is bright, and indication has electric current to flow through, and electric current is without rectifier diode when the double-pole multithrow switch is connected high power, and during the low-power retaining, power supply is through the rectifier diode halfwave rectifier, thus reduction power.
Adopt the electric blanket of said structure, have good electromagnetic induction function of shielding and simple and practical power adjustments function, the people that are specially adapted to specific groups such as pregnant woman, child, patient the old and the weak use.
Further specify the utility model below in conjunction with accompanying drawing:
Fig. 1: heating wire five-layer structure signal
Fig. 2: controller circuitry figure
Heating wire in the electric blanket has five layers from inside to outside, is respectively high strength fiber material inner core (1), coiling at the heater strip on the inner core (2), inner insulating layer (3), the external insulation layer (5) that is wound on the screen (4) on (3) and is enclosed within outermost.
Control circuit is made of power indicating circuit and power conditioning circuitry, indicating circuit is made of R and LED, when electric current is added on heater strip (2), has a shunt current to make LED luminous on R, shielding is wound on the outer field empire silk of heater strip through (1), and an end (1) is through protective tube BX
2Connect the attaching plug earth terminal, the other end (3) is unsettled.Power adjusting circuit is made of a rectifier diode D, connected a double-pole multithrow switch K between the line end mutually of two circuit and attaching plug and the zero line side, when K beats at 1 grade, electric current flows into heater strip (2) through protective tube BX1, get back to electric current through rectifier diode, because of D has the halfwave rectifier effect, half when group's power is not rectification is low grade; When K beats on second gear, electric current is without rectification, directly returns power supply after being flowed out by electrical heating wire, is top grade.
Claims (3)
1, anti-electromagnetic induction electric blanket; form by electric blanket and controller; totally five layers from inside to outside of the heating wires of electric blanket; be respectively internal core wire, heater strip, inner insulating layer, shielding silk and external insulation layer; it is characterized in that heater strip one end links to each other with the line end mutually of three-terminal polarized plus plug by a protective tube; the other end links to each other with zero line side, and shielding silk one end links to each other with the earth terminal of three-terminal polarized plus plug by protection tube, and the other end is unsettled.
2, anti-electromagnetic induction electric blanket according to claim 1; it is characterized in that controller is made of power indicating circuit and power conditioning circuitry and overcurrent protection; connected a double-pole multithrow switch K between the line end mutually of this circuit and attaching plug and the zero line side, this switch and rectifier diode D constitute power conditioning circuitry.
3,, it is characterized in that between attaching plug and the heating wire and shield between silk and the attaching plug earth terminal that a protective tube is respectively arranged according to claim 1 and 2 described anti-electromagnetic induction electric blankets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94244510 CN2200269Y (en) | 1994-11-10 | 1994-11-10 | Electric heating blanket capable of preventing electromagnetic induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94244510 CN2200269Y (en) | 1994-11-10 | 1994-11-10 | Electric heating blanket capable of preventing electromagnetic induction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200269Y true CN2200269Y (en) | 1995-06-07 |
Family
ID=33850556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94244510 Expired - Fee Related CN2200269Y (en) | 1994-11-10 | 1994-11-10 | Electric heating blanket capable of preventing electromagnetic induction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200269Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106490905A (en) * | 2016-12-20 | 2017-03-15 | 大连创达技术交易市场有限公司 | Hot-water heating water-cooled dual-purpose type electric blanket |
-
1994
- 1994-11-10 CN CN 94244510 patent/CN2200269Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106490905A (en) * | 2016-12-20 | 2017-03-15 | 大连创达技术交易市场有限公司 | Hot-water heating water-cooled dual-purpose type electric blanket |
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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 |