CN2242042Y

CN2242042Y - Improved electric sleeping rug

Info

Publication number: CN2242042Y
Application number: CN 95220179
Authority: CN
Inventors: 张式先
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-29
Filing date: 1995-08-29
Publication date: 1996-12-11
Anticipated expiration: 2005-08-29

Abstract

The utility model relates to an electric blanket by DC supply. After the AC power passes a bridge rectifier, the output DC voltage is connected with both ends of the heating wires of the heating blanket; flexible bands which are coated with iron powder are fixed between the parallel segments of the heating wires which are arranged in the rotary way and on the carpet tyre. The heating blanket has not alternating magnetic field, make the human body prevent the interference of the alternating magnetic field and is beneficial to the good health of users.

Description

A kind of improved electric blanket

The utility model belongs to electric heater unit, particularly a kind of electric blanket.

Electric blanket has warming resisting cold, characteristics easy to use, more general entered general family, but use discovery for a long time according to the applicant, it is substantial that existing electric blanket can make the people sleep, and lassitude is even unstable, the applicant that traces it to its cause thinks and uses electric main directly to make power supply, can around heating wire, produce alternating magnetic field, the balance of human body in the earth's magnetic field is interfered, so that uncomfortable phenomenon takes place.

The utility model is to a kind of improvement of existing electric blanket, provides a kind of electric blanket that does not produce alternating magnetic field, to overcome the deficiencies in the prior art.

Above-mentioned purpose is realized by following technical scheme:

AC power meets input a, the b of bridge rectifier, and its output c, d connect heating wire (1) two ends of electric blanket by lead, goes up between each parallel-segment of heating wire that revolution arranges the fixedly flexibility band (3) of coated iron powder at blanket tire (2);

Blanket tire (2) and wadding (4) between each parallel-segment of heating wire are made pocket shape, the middle flexibility band (3) of placing the coated iron powder;

Above-mentioned AC power can be to introduce by the movable contact 1,4 of double-point double-throw switch K, the

stationary contact

3,6 of K switch meets input a, the b of bridge rectifier respectively, the stationary contact 2 of K switch connects commutation diode D5 one end, the stationary contact 3 of another termination K switch,

stationary contact

5,6 short circuits of K switch.

Further specify the technical program with drawings and Examples below:

Accompanying drawing 1, the utility model electrical schematic diagram;

Accompanying drawing 2, the utility model structural representation.

As shown in Figure 1, when K switch is position shown in the figure, K is the high temperature gear, the bridge rectifier that this moment, 220V formed through the D1-4 diode is exported the DC voltage of about 200V, when K switch is thrown in the low temperature gear, commutation diode D5, be connected on the stationary contact 2 of K switch, between 3, exchange input this moment through commutation diode D5, D1, the halfwave rectifier branch road that D3 is in series, the DC voltage of the about 100V of output, no matter all-wave or halfwave rectifier, especially its pulsation composition of halfwave rectifier still produces more weak pulsating field on heating wire, because the technical program is provided with the flexibility band of coated iron powder between each parallel-segment of heating wire, it will absorb electromagnetic energy and be magnetized, and produce faint eddy current, make original more weak pulsating field become fainter.Another effect of flexible band is to absorb and the storage compartment heat, makes the electric blanket surface temperature incline to equilibrium, and the flexibility band of this example adopts general video-tape, also can adopt the magnetic adhesive tape.

Fig. 2 is a concrete structure of the present utility model, the heating wire (1) that the revolution that is adhesively fixed between blanket tire (2) and the wadding (4) is arranged, and make between each parallel-segment of heating wire and to form the pocket that a side has opening, to be through through the video-tape of cutting in the pocket, make cover (5) and get final product, the heating wire specification is divided three kinds of 45W, 90W, 135W, can be for single, double and three people's electric blankets use, half of the quite above-mentioned value of its power during the low temperature gear.

Rectification circuit is welded in the switch enclosure (6), and is provided with luminous tube LED as powering up indication, and the lead before the switch enclosure is an AC power cord, and lead afterwards is the dc output power line, with the insulation processing routinely that is connected of heating wire in the blanket.

Electric blanket of the present utility model does not have alternating magnetic field, and dc electromagnetic field is also very faint, makes human body exempt the interference of alternating magnetic field, is of value to the healthy of user.

Claims

1, a kind of improved electric blanket, formed by K switch, heating wire (1), rectifying tube D5 and blanket tire (2), cover (5), it is characterized in that: AC power meets input a, the b of bridge rectifier, its output c, d are connected heating wire (1) two ends of electric blanket by lead, go up at blanket tire (2) between each parallel-segment of heating wire of revolution arrangement, be fixed with the flexibility band (3) of coated iron powder.

2, electric blanket as claimed in claim 1 is characterized in that: blanket tire (2) and wadding (4) between each parallel-segment of heating wire (1) are made pocket shape, the middle flexibility band (3) of placing the coated iron powder.

3, electric blanket as claimed in claim 1, it is characterized in that: AC power is introduced by the movable contact 1,4 of double-point double-throw switch K, the stationary contact 3,6 of K switch connects input a, the b of bridge rectifier respectively, the stationary contact 2 of K switch connects commutation diode D5 one end, the stationary contact 3 of another termination K switch, stationary contact 5,6 short circuits of K switch.