CN2686269Y

CN2686269Y - Safety and comfortable temperature adjustable electric heating blanket

Info

Publication number: CN2686269Y
Application number: CN 200320105452
Authority: CN
Inventors: 孟秋芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-20
Filing date: 2003-11-20
Publication date: 2005-03-16
Anticipated expiration: 2013-11-20

Abstract

The utility model discloses a safe and comfortable temperature-regulating electric blanket for family daily life, comprising a blanket cloth 1, a temperature sensor 2, electric heating wires 3, an electric heating wire connection box 4, a temperature sensor connection box 5, a controller 6, a power cord and a plug 7. The blanket cloth 1 is divided into high, middle and low three temperature zones. Compared with the common electric blankets, the electronic constant temperature electric blanket is comfortable, and with high security, the utility model is convenient for regulating the temperature and saves electric energy.

Description

The temperature adjustable electrically heated blanket of a kind of safety and comfort type

Technical field:

The utility model relates to a kind of electrothermal articles for use that are used for family daily life.

Background technology:

Electric blanket is a kind of autumn and winter low temperature, family's cold season warming article commonly used.But the electric blanket that uses has only two grades of temperature adjustments of height usually at present, and heating wire evenly distributes in the whole electric blanket, and the heating-up temperature homogeneous can not adapt to the requirement of different users to temperature.In addition, existing electric blanket fail safe, comfortableness are not ideal enough, and heating wire fractures and is difficult for being found immediately that easily there is potential safety hazard in sparking; Use AC power can produce alternating electromagnetic field, heating wire evenly distributes, and causes the body water loss more, is prone to the phenomenon of mouth parched and tongue scorched.Above-mentioned weak point makes the application of electric blanket be restricted, and need be improved, to improve its safety, comfortableness.

Summary of the invention:

The utility model purpose is to provide a kind of suitable human physilogical characteristic, safe in utilization, the temperature adjustment temperature adjustable electrically heated blanket of safety and comfort type easily.

The utility model is to realize like this.This kind electric blanket is made up of blanket cloth, heating wire, temperature sensor, heating wire terminal box, temperature sensor terminal box, controller, power line and plug, be provided with heating wire along whole blanket face between table, the two-layer blanket cloth in lining, density reduces to form high, medium and low three humidity provinces successively, is provided with temperature sensor in the high-temperature region; Heating wire is connected with the temperature sensor terminal box with the heating wire terminal box of blanket cloth one end respectively with temperature sensor; The heating wire terminal box is connected with controller respectively with the temperature sensor terminal box, and controller has picked out power line and plug.During use, power-line plug is inserted on the AC Power supply socket, opens the mains switch on the controller, can come into operation, and can be regulated temperature by the temperature adjustment knob on the pivoting controller.This kind electric blanket can normally generate heat heating wire owing to replace alternating current with direct current, strengthens fail safe, do not produce alternating electromagnetic field again, replace full blanket heating wire evenly to distribute, high, medium and low three warm area cold head and warm foots with three-temperature-zone, meet the physilogical characteristics of human body, comfort.The temperature sensor that is arranged in the high-temperature region detects variations in temperature, and is that benchmark carries out respective handling with the temperature that is provided with, and makes temperature keep constant.Change the temperature spot that is provided with and also just realized the purpose of temperature adjustment.Be provided with bridge rectifier filter circuit and temperature regulation circuit in this Setup Controller, housing is provided with electronic clock, and can pass through the timing signal powered-down, helps economize on electricity and safety.

The utility model is compared with common electric blanket, has advantages such as comfortable, high safety, temperature adjustment convenience, saves energy, is suitable for and applies.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is galvanic bridge rectifier filter circuit figure for alternating current converts to.

Fig. 3 is temperature regulation circuit figure.

Embodiment:

Below in conjunction with accompanying drawing the utility model is described further.

As shown in the figure, the utility model is made up of blanket cloth 1, temperature sensor 2, heating wire 3, heating wire terminal box 4, temperature sensor terminal box 5, controller 6 and power line and plug 7, its structure, assembled relation is as follows: be provided with heating wire 3 along whole blanket surface density between table, the two-layer blanket cloth 1 in lining with reducing successively, form high, medium and low three humidity provinces 8,9,10, in high-temperature region 8, be provided with temperature sensor 2; Heating wire 3 goes between by self respectively with temperature sensor 2 and is connected with temperature sensor terminal box 5 with the heating wire terminal box 4 of blanket cloth 1 one ends with temperature sensor wires 14; Heating wire terminal box 4 is connected with controller 6 respectively with temperature sensor terminal box 5, and controller 6 picks out power line and plug 7.Wherein, heating wire 3 density that are arranged on the blanket cloth 1 high, medium and low warm area 8,9,10 reduce successively.Controller 6 housings are provided with electronic clock 11, temperature adjustment knob 12, mains switch 13, be provided with bridge rectifier filter circuit and temperature regulation circuit in it, power supply adopts AC power, utilize the unilateral conduction of diode and the filtering characteristic of electric capacity, convert alternating current to direct current, the bridge rectifier filter circuit (see figure 2) that is adopted is by 4 diode D ₁-D ₄Form load R with 1 electrochemical capacitor C _L(being heating wire) is in parallel with capacitor C.The temperature regulation circuit (see figure 3) is made up of hygrosensor, bivalve threshold voltage comparator and reference voltage regulator, and wherein, hygrosensor is by negative tempperature coefficient thermistor R _tAnd resistance R ₁Form, bivalve threshold voltage comparator is by resistance R ₁_ _ _ _ R ₅With 2 operational amplifier IC ₁, IC ₂Form, reference voltage regulator is by resistance R ₆, R ₇, Rp forms.At load R _LAc power supply circuit in, connected one with bidirectional triode thyristor VS ₁Be the electronic power switch of core, whether the work of load is subjected to the control of this switch, and this switch is controlled by temperature regulation circuit.Hygrosensor is converted to the variation of direct voltage with the variations in temperature of electric blanket, is input to IC ₁In-phase input end and IC ₂Inverting input.In the bivalve threshold voltage comparator, IC ₂Normal phase input end and low valve valve voltage join IC ₁Inverting input and high threshold voltage join, the purpose of using the bivalve value is to eliminate common single valve threshold voltage comparator to produce the phenomenon of frequent switch during near design temperature at electric blanket temperature.In the reference voltage regulator, suitably select R ₆, R ₇Resistance, can set thermoregulation range, regulate Rp and can continuously change IC ₁, IC ₂High and low threshold values, also promptly continuously change electric blanket temperature.IC ₁, IC ₂Controlling by controllable silicon VS ₂, " with door " switch of forming of triode VT, as controllable silicon VS ₂, during the equal conducting of triode VT, photoelectrical coupler IC ₃Trigger the electronic power switch conducting, load R _LGet final product electric work.During start just, because electric blanket temperature is lower, thermistor R _tBe high value, make resistance R ₁On dividing potential drop also lower, IC ₁Output low level makes triode VT saturated, IC ₂The output high level makes controllable silicon VS ₂Conducting, " with door " switch connection, photoelectrical coupler IC ₃Trigger electronic power switch, load R _LGet electric intensification.Along with the rising of temperature, thermistor R _tResistance begins to descend resistance R ₁Last dividing potential drop then begins (because the R that rises ₁Both end voltage rises with the rising of temperature, descends with decrease of temperature, for the convenience on narrating, claims that here this voltage is for " temperature voltage "), when temperature voltage during greater than low valve valve voltage, IC ₂Output low level, controllable silicon VS ₂Lose trigger voltage, but still keep conducting state, at this moment electric blanket temperature is near design temperature.When temperature voltage during greater than high threshold voltage, IC ₁The output high level ends triode VT, controllable silicon VS ₂Also turn-off, " with door " switch cuts out thereupon, and electronic power switch is also closed thereupon, load R _LThen quit work, at this moment electric blanket is by residual heat insulation.As time goes on, electric blanket temperature begins to descend, when temperature voltage is lower than high threshold voltage, and IC ₁Output low level, triode VT is saturated, is in standby condition.When temperature voltage is lower than low valve valve voltage, IC ₂The output high level, controllable silicon VS ₂Conducting, " with door " switch connection, photoelectrical coupler IC ₃Trigger electronic power switch, load R _LElectricity heats up again.Circulation and so forth, the temperature of electric blanket just is controlled near the slightly fluctuation up and down temperature of setting.Suitably select resistance R ₃, R ₄Resistance, can make fluctuation range≤1 ℃, regulate Rp, the temperature that just can in thermoregulation range, regulate electric blanket continuously.

Claims

1, the temperature adjustable electrically heated blanket of a kind of safety and comfort type, form by blanket cloth (1), heating wire (3), heating wire terminal box (4), controller (6) and power line and plug (7), it is characterized in that: be provided with heating wire (3) along whole blanket surface density between table, the two-layer blanket cloth in lining (1) with reducing successively, form high, medium and low three humidity provinces (8), (9), (10), in high-temperature region (8), be provided with temperature sensor (2); Heating wire (3) is connected with temperature sensor terminal box (5) with the heating wire terminal box (4) of blanket cloth (1) one end respectively with temperature sensor (2); Heating wire terminal box (4) is connected with controller (6) respectively with temperature sensor terminal box (5), and controller (6) picks out power line and plug (7).

2, the temperature adjustable electrically heated blanket of safety and comfort type according to claim 1 is characterized in that: be provided with by diode D in the controller (6) ₁-D ₄, the bridge rectifier filter circuit formed of electrochemical capacitor C and the temperature regulation circuit of forming by hygrosensor, bivalve threshold voltage comparator, reference voltage regulator.