CN201119668Y

CN201119668Y - electric blanket

Info

Publication number: CN201119668Y
Application number: CNU2007200422742U
Authority: CN
Inventors: 王小君
Original assignee: SUZHOU NUOYIMAN INDUSTRIAL Co Ltd
Current assignee: SUZHOU NUOYIMAN INDUSTRIAL Co Ltd
Priority date: 2007-11-14
Filing date: 2007-11-14
Publication date: 2008-09-24
Anticipated expiration: 2017-11-14

Abstract

An electric blanket comprises a blanket body composed of a head portion, a body portion and a foot portion, electric resistance wires in the body and foot portions, and a temperature controlling circuit for heating the wires, wherein the body portion is sparsely distributed with a first electric resistance wire, the foot portion is densely distributed with a second electric resistance wire, and the distance of the first wire is larger than the second wire. When in use, the heating capacity at unit area of the dense second electric resistance wire is higher than the sparse first electric resistance wire, to heat the foot portion and increase temperature, and the foot portion has higher temperature than the body portion to meet different temperature demands of user body and feet.

Description

Electric blanket

Technical field

The utility model relates to a kind of electric blanket.

Background technology

Electric blanket is as a kind of household articles, the shop in bed with cold season elder or weak people use, existing electric blanket is made of bed blanket, the heater that is laid in the blanket body, heater be generally one arranged evenly in the other parts except that head of blanket body resistance wire and control circuit break-make and the switch that can regulate heating-up temperature constitute, resistance wire then density is arranged equably.With the electric blanket shop in bed; connect power supply and can convert electrical energy into heat energy by heater; though can control temperature by the adjusting of gauge tap; but because the heating-up temperature of resistance wire can only whole be controlled; and it is different in the required temperature of cold snap people's health and foot; if heighten heating-up temperature to adapt to the needs of pin; the people of sleep can wake up because somatosensory is overheated and hot usually; and turn down temperature to meet the temperature requirements of health; it is colder that foot can feel again; the people is had difficulty in going to sleep, and very difficult heating and temperature control with resistance wire is one makes health and foot all feel moderate moisture, so existing electric blanket can't satisfy the comfort level demand of human body.

Summary of the invention

The purpose of this utility model provides a kind of electric blanket, and its heating-up temperature in foot is higher than the heating-up temperature at body part.

The technical solution of the utility model is: a kind of electric blanket, comprise and have head, body portion and the blanket body of foot, the body portion that is arranged at described blanket body and the resistance wire in the foot, be used for the temperature control circuit of resistive heater, sparsely be distributed with first resistance wire in the body portion of described blanket body, be distributed with second resistance wire in the foot of described blanket body thick and fast, the arrangement pitches of described first resistance wire is bigger than the arrangement pitches of second resistance wire.

In a kind of optimisation technique scheme of the present utility model, described temperature control circuit has the gauge tap of controlling first resistance wire, second resistance wire respectively.

The utility model has the advantages that: after connecting power supply, the unit are caloric value of second resistance wire of dense arrangement is higher than the unit are caloric value of arranging the first sparse resistance wire, make the foot of blanket body to be heated and the rising temperature rapidly, and the temperature of blanket body foot is higher than the temperature of blanket body body portion, with the health that adapts to human body and the different temperatures demand of pin.

Description of drawings

Accompanying drawing 1 is an internal structure schematic diagram of the present utility model;

Accompanying drawing 2 is the application circuit schematic diagram of embodiment one of the present utility model;

Accompanying drawing 3 is the application circuit schematic diagram of embodiment two of the present utility model;

Accompanying drawing 4 is electric blanket temperature control circuit schematic diagram commonly used;

Wherein: 1, blanket body; 2, head; 3, body portion; 4, foot; 5, first resistance wire; 6, second resistance wire; 7, control box.

The specific embodiment

Shown in accompanying drawing 1, a kind of electric blanket, comprise and have head 2, the resistance wire in body portion 3 and the blanket body 1 of foot 4, the body portion 3 that is arranged at described blanket body 1 and the foot 4, be used for the temperature control circuit of resistive heater, sparsely be distributed with first resistance wire 5 in the body portion 3 of described blanket body 1, the arrangement pitches that is described first resistance wire 5 is bigger than the arrangement pitches of second resistance wire 6, be distributed with second resistance wire 6 in the foot 4 of described blanket body 1 thick and fast, head 2 non-resistance silks distribute, and it is easily sleeping to be convenient to the people.Described temperature control circuit has the gauge tap of controlling first resistance wire 5, second resistance wire 6 respectively.

Referring to accompanying drawing 2, circuit application figure shown in the accompanying drawing 3, wherein, in the circuit shown in Figure 2, RL1 is first resistance wire 5, RL2 is second resistance wire 6, two-way resistance R L1 and RL2 are in parallel, RL1 and gauge tap K1 are in series, RL2 and gauge tap K2 are in series, in the series circuit of resistance R L1 and gauge tap K1, can insert variable resistor, to regulate the caloric value of controlling resistance silk RL1, in the series circuit of resistance R L2 and gauge tap K2, also can insert variable resistor, to regulate the caloric value of controlling resistance silk RL2, also can with RL1 be in series with a variable resistor after RL2 is in parallel, to regulate resistance wire RL1 simultaneously, the caloric value of RL2 is the common technology scheme and insert variable-resistance mode in the residing circuit of resistance wire, shows variable resistor so omit in circuit shown in Figure 2.Be in series the break-make of control way circuit after the parallel connection of two-way resistance wire with a total control switch K.In this embodiment, optimized mode is to set the resistance value of the resistance value of RL1 more than or equal to RL2, like this when RL1, RL2 connect simultaneously, the caloric value of resistance wire RL2 in the foot 4 is bigger, and on the area distribution of electric blanket, the area of the foot 4 of blanket body 1 is less than the area of body portion 3, the foot 4 that further guarantees blanket body 1 be heated heat up faster higher, foot's temperature requirements that can adapt to human body, body portion 3 intensifications of blanket body 1 are slow and temperature is lower, to adapt to the body temp demand of human body.Gauge tap K1, K2 and total control switch K can be arranged near in the control box 7 of blanket body 1.

In the circuit of embodiment two shown in Figure 3, RL1 is first resistance wire 5, RL2 is second resistance wire 6, resistance R L1, RL2 are in series, in this series circuit, insert total control switch K, and at the two ends of resistance wire RL1 gauge tap K3 in parallel, when opening gauge tap K3, when connecting total control switch K, can control resistance wire RL1, RL2 heats simultaneously, in the series circuit of two resistance wires, can insert variable resistor, by regulating variable-resistance resistance value size, the caloric value of adjustable resistor silk RL1, RL2; And during closed gauge tap K3, resistance wire RL 1 is in short-circuit condition, and only controlling resistance silk RL2 heating work makes when the human body sensory body temp suits, only the foot 4 of heating blanket body 1.Gauge tap K3 and total control switch K are arranged in the control box 7.The mode of more optimizing as relative this embodiment; the two ends of resistance wire RL2 also can gauge tap in parallel; in this case; resistance wire RL1 also should be connected with a protective resistance with the heat-generating units that RL2 constitutes; to guarantee the safe in utilization of electric blanket; those skilled in the art are easy to infer the circuit theory diagrams of this mode according to circuit shown in Figure 3, so adopt accompanying drawing to represent no longer in addition.

As another optimal way of embodiment two, resistance wire RL 1 also can be in parallel with a variable resistor, and resistance wire RL2 also can be in parallel with a variable resistor, to regulate the heating power of resistance wire RL 1, RL2 respectively, optimizes the thermal effect that adds of electric blanket.

Variable-resistance installation is used can be referring to electric blanket temperature control circuit figure commonly used, and as shown in Figure 4, this temperature control circuit is made up of rectification circuit and observing and controlling circuit temperature, among the figure, RT1 and RT2 are thermal resistor, are used to detect the temperature of zones of different, and variable resistor RP has the effect of default constant temperature value.

When connecting power supply, after civil power directly passes through the bridge circuit rectification, charge to capacitor C by RT1, RT2, RP, when the charging voltage of C reaches certain value, by diode VD5, VD6 discharge, make one-way SCR diode VS triggering and conducting, resistance wire RL gets electric heating and enters soaking condition.Along with the rising of electric blanket temperature, the resistance of RT1, RT2 increases, and the time constant of charge circuit will increase gradually, and the angle of flow of VS will be more and more littler, and the heating power of RL will descend thereupon.In the time of near electric blanket temperature further rises to predetermined value, the resistance of RT1, RT2 will be the increase of jumping characteristic, make the angle of flow of VS be approximately zero, and the circuit load electric current is little that RL is generated heat hardly, so electric blanket enters the constant temperature warming state.Otherwise when the temperature of electric blanket drops to when being lower than about 5 ℃ of preset value, VS is triggering and conducting again, RL electricity heating again.Move so repeatedly, reach the purpose of automatic constant-temperature.The utility model can be used this temperature control circuit, first resistance wire 5, second resistance wire 6 are inserted respectively in the temperature control circuit of two parallel connections, the heating-up temperature of independent control first resistance wire 5, second resistance wire 6, or with in first resistance wire 5, the same temperature control circuit of second resistance wire, 6 accesses, and utilize connecting circuit shown in Figure 3.

Claims

1, a kind of electric blanket, comprise resistance wire in have head (2), body portion (3) and the blanket body (1) of foot (4), the body portion (3) that is arranged at described blanket body (1) and the foot (4), be used for the temperature control circuit of resistive heater, it is characterized in that: sparsely be distributed with first resistance wire (5) in the body portion (3) of described blanket body (1), be distributed with second resistance wire (6) thick and fast in the foot (4) of described blanket body (1), the arrangement pitches of described first resistance wire (5) is bigger than the arrangement pitches of second resistance wire (6).

2, electric blanket according to claim 1 is characterized in that: described temperature control circuit has the gauge tap of controlling first resistance wire (5), second resistance wire (6) respectively.