CN2033675U

CN2033675U - Safty electric warming blanket

Info

Publication number: CN2033675U
Application number: CN 88206665
Authority: CN
Inventors: 涂琪生; 万仲鄂
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-04
Filing date: 1988-06-04
Publication date: 1989-03-08

Abstract

The utility model discloses a safety electric warming blanket. The utility model is characterized in that the alternating current voltage with 220 volt is converted into the direct current voltage from 25 volt to 45 volt to supply electricity. The utility model does not create electric shock injury accident for the human body. The fire accident can not be generated, and the utility model avoids the adverse effect of the alternating electromagnetic field for the human body. The utility model not only saves electricity, but also is safe. The utility model has the advantages of simple structure and high durability. The utility model is a necessary health product for the household in winter.

Description

Safty electric warming blanket

This utility model is a kind of safety electric blanket, is the improvement to existing electric blanket.

The electric blanket of Xiao Shouing all is the two ends that directly 220 volts civil power are added in heating wire in the market, and the electrothermal wire heating is warmed oneself, and this just human electric shock's major accident may take place in use.For safety, producer will expose heating wire and use the yarn bag instead and add the airtight insulating plastic cement heating wire of plastics, and safety has obtained large increase.But this safety is impermanent, have more than is needed three, five years, appearance plastic layer ageing hardening, breaks and loses safety.And the ectonexine insulant of heating wire all is the well insulated body of heat, hindered that heat outwards transmits on the heating wire, increased power consumption.In case the diameter in (as folding more etc.) heating wire somewhere slightly reduces for a certain reason, thereby resistance herein increases a lot, and when energising was used, the temperature at this place rose very soon, very high.When serious, the cotton covered wire here will be burnt, and outer layer plastic can be burnt, and then causes the human electric shock and burning bedding and cause fire.In addition, electric blanket directly uses 220 volts of alternating currents, and at the bigger alternating electromagnetic field of near surface generation intensity of heating wire, this alternating electromagnetic field is known from experience the generation harmful effect to the people.As heart disease is increased the weight of, anemia of pregnant woman's miscarriage or the like.So commercially available electric blanket is very unsafe at present.Also have in the use such as unmanned on the scene can not the use, Simmons mattress can not use, child can not jump in bed, heating wire has ruptured, must send the qualification of producer's repairing or the like and so on, many users dare not courageously use after buying, and only switch on for a moment before going to bed, before sleeping provide against any misfortune in then disconnected power down source.

This utility model designs at the existing disadvantage that electric blanket is absolutely unsafe and power consumption is big, this utility model provides a kind of human body can not get an electric shock, and can not catch fire, and does not have ac magnetic field injury health, overall safety, the electric blanket that electricity consumption economizes.

Utility model is achieved in that and the utlity model has a mains transformer, a commutator, a temperature regulation switch, a capacitor and an exposed heating wire.Mains transformer through temperature regulation switch, is added in the input of commutator with three voltages that 220 volts of AC voltage conversion become to vary in size, be transformed into 25 volts through commutator, the DC voltage of 35 volts and 45 volts through being added in behind the capacitor filtering on the heating wire, makes the electrothermal wire heating.45 volts DC voltage still belongs to the safe voltage scope to human body, has both made the less people of human body resistance, and the touching heating wire can not damage health yet, when heating wire passes to DC current, produces stable magnetic field around the heating wire, and does not have alternating electromagnetic field.Magnetic field does not produce harm to human body, and the earth that the mankind depend on for existence is exactly a big magnet, just lives in the powerful earth's magnetic field since the dawn of human civilization.Because heating wire exposes, heat can outwards transmit rapidly, and under 45 volts of voltages, its maximum temperature of exposed heating wire with certain resistance is limited in below 35 ℃, and the condition of a fire can not take place.A safety electric blanket power consumption 50W when maximum temperature is half of existing commercially available electric blanket power consumption.

Except safe and reliable, electricity consumption more outside the province, this utility model also has durable in use, temperature is adjustable, is not afraid of to laminate, plank bed, palm fibre bed, Simmons mattress all can use, and after heating wire fractures, can do it yourself to connect and continue to use.

Technical essential of the present utility model is: with mains transformer and commutator 220 volts AC voltage conversion is become required DC voltage, do heater element with exposed heating wire, electric energy is transformed into heat energy, provide three kinds of different DC voltages with temperature regulation switch to heating wire, to produce high, medium and low three kinds of different temperature ， And three kinds of different temperature of diode displaying.

Electrical principle of the present utility model is seen accompanying drawing: 1 is mains transformer in the accompanying drawing, and 2 is temperature regulation switch, and 3 is commutator, and 4 is capacitor, and 5 is heating wire, and 6 is current-limiting resistance, and 7 is temperature indicator, and 8 is attaching plug.

Claims

1, a kind of safety electric blanket is by a mains transformer, a temperature regulation switch, a commutator, a capacitor, a heating wire, a light emitting diode, a current-limiting resistance and an attaching plug are formed, the two ends that it is characterized in that attaching plug link to each other with the elementary winding of mains transformer, and a of mains transformer secondary windings, b, c end link to each other with three contacts of temperature regulation switch, the ac input end c of d end and commutator ¹Link to each other the ac input end a of the movable contact of temperature regulation switch and commutator ¹Link to each other, the positive pole of capacitor links to each other with negative pole with the positive pole of the dc output end of commutator with negative pole, is attempted by the two ends of heating wire after light emitting diode and current-limiting resistance are connected, and the two ends of heating wire and the outfan of commutator are mutually and connect.

2, safety electric blanket according to claim 1, the secondary windings that it is characterized in that mains transformer provide 15 volts to 60 volts 2 to 5 of safe voltages, and the pressure difference scope between them is 5 volts to 15 volts, and best differential pressure value is about 10 volts.

3, safety electric blanket according to claim 1 is characterized in that the running voltage of commutator must not be less than 50 volts, and output current must not be less than 1 ampere.

4, safety electric blanket according to claim 1, the Standard resistance range that it is characterized in that heating wire are 20 ohm to 70 ohm, and optimum range is 30 ohm to 50 ohm.

5, safety electric blanket according to claim 1 is characterized in that, removes heating wire and makes in the cotton blanket inside and outside, and other components and parts can be made an integral body.

6, safety electric blanket according to claim 1 is characterized in that except that mains transformer, and other components and parts can be made an integral body.