CN2182504Y

CN2182504Y - Temperature self-control switch for electric-heating blanket

Info

Publication number: CN2182504Y
Application number: CN 93207672
Authority: CN
Inventors: 何生荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-31
Filing date: 1993-03-31
Publication date: 1994-11-09
Anticipated expiration: 2003-03-31

Abstract

The utility model relates to a temperature self-control switch for electric-heating blankets. A circuit board (1) is arranged in an upper and a lower casings, and the upper side of a casing is provided with a double-channel double-break switch K; a potentiometer sliding arm (4) is at the bottom, and the side of the sliding arm is a temperature reticle; a thermal indicating light and a power supply switching indicating light (6) are arranged at the bottom of the sliding arm. The circuit theory is that an inductance coil L is connected in series on the circuit line A and a resistor R is connected in parallel with a potentiometer W; the B end is connected with a bidirectional thyristor anode, and the E end is connected with a bidirectional trigger diode and a capacitor C; the trigger electrode of the bidirectional thyristor is connected with the F end of the bidirectional trigger diode.

Description

Temperature self-control switch for electric-heating blanket

The utility model relates to a kind of electric blanket temperature autocontrol switch.

The electric blanket temperature regulating switch of Chu Shouing has two kinds in the market, a kind of is simple type, promptly be in the bed switch of a double on and off, to add a rectifier diode, use total head alternating current 220V voltage when needing high temperature, during low temperature alternating current 220V is the 110V pulsed dc voltage and adds indicator light in switch through diode rectification, this switch shortcoming is too high when being high temperature, and is too low again during low temperature.Another kind is an all-electronin integrated circuit temperature regulating switch, and this switch temperature adjustment is suitable, but complex structure, and bad repairing costs an arm and a leg, and users should not accept, and adorns in the electric blanket of this switch and will adorn temp probe.

The purpose of this utility model is to design a kind of price and should be accepted by users, and temperature needs the electric blanket temperature autocontrol switch that oneself can adjust arbitrarily with the user, and this switch is noiseless to colour TV, radio-cassette player, player etc.

The purpose of this utility model realizes by following design, circuit board (1) is contained in the upper and lower casing (2), and the double on and off K switch is arranged above the housing, and bottom is potentiometer slider (4), the cursor slide side is the temperature groove, and cursor slide bottom is temperature indicator D2 and on/off indicator light D1.The circuit theory of peace is that the double on and off K switch is connected on the power supply, inductance coil L is serially connected on the circuitry lines A, resistance R is in parallel with potentiometer W, B end and inductance coil and bidirectional triode thyristor G anode join, the E end joins with bidirectional trigger diode D, capacitor C, the trigger electrode of bidirectional triode thyristor G and bidirectional trigger diode F end join, silicon controlled negative electrode and capacitor H end join, parallel resistance R1 and light-emitting diode D1 between circuitry lines A and the N, parallel resistance R2 and light-emitting diode D2 between N and the H, R1 and D1 polyphone, R2 and D2 polyphone.

Advantage of the present utility model: simple in structure, durable, be convenient to repair, noiseless to household electrical appliance, the temperature of electric blanket needs to adjust at any time with the user, and moderate cost is convenient to promote, this switch also can be used on the light modulation of bedside lamp, desk lamp, little electric fan, motor etc., and speed governing also has energy-conserving action.

Below to description of drawings:

The profile of Fig. 1 electric blanket temperature autocontrol switch

Fig. 2 electric blanket temperature autocontrol switch circuit theory diagrams

Fig. 3 electric blanket temperature autocontrol switch circuit board is formed and wiring

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.Circuit board (1) is contained in the upper and lower casing (2), and it is potentiometer slider (4) that double on and off K switch bottom is arranged above the housing, and the cursor slide side is the temperature groove, and cursor slide bottom is temperature indicator D2(5) and on/off indicator light D1(6).The left side is double on and off K switch contact on the circuit board, the upper right side is a capacitor C, in the right side potentiometer W, below C and W inductance coil L, resistance R, bidirectional trigger diode D, bidirectional triode thyristor G, turning right is resistance R 1 again, green LED D1, the most right-hand be resistance R 2, red light emitting diodes D2, circuit theory is that the double on and off K switch is connected on the power supply, inductance coil L is serially connected on the circuitry lines A, resistance R is in parallel with potentiometer W, and B end and inductance coil and bidirectional triode thyristor G anode join, E end and bidirectional trigger diode D, capacitor C is joined, the trigger electrode of bidirectional triode thyristor G and bidirectional trigger diode F end join, silicon controlled negative electrode and capacitor H end join parallel resistance R1 and light-emitting diode D1 between circuitry lines A and the N, parallel resistance R2 and light-emitting diode D2 between N and the H, R1 and D1 polyphone, R2 and D2 polyphone.N and H terminate on the electric blanket (3).

Circuit theory diagrams shown in 2 in conjunction with the accompanying drawings, describe its operation principle in detail: the voltage U c on the capacitor C will lag behind phase angle of input voltage U.Remove to control bidirectional triode thyristor G with Uc and trigger bidirectional trigger diode D, remove to trigger bidirectional triode thyristor G by D again, to guarantee the two-way all conductings of controllable silicon.When the numerical value of potentiometer W less, phase angle φ hour, then the bidirectional triode thyristor G angle of flow is big, the electric current that flows through electric blanket is just big, temperature is just high; Otherwise, when the numerical value that strengthens potentiometer W, when phase angle φ is big, then the bidirectional triode thyristor G angle of flow is little, the electric current that flows through is just little, temperature reduces (more than be under the constant situation of capacitor C) so the resistance by regulator potentiometer W just can be regulated the power of electric blanket smoothly continuously, thereby can obtain the variation of electric blanket temperature in 0～42 ° of scope.

The relation of capacitor C and potentiometer W is complementary, because the two ends at W and C all are added with voltage, with since control trigger, beginning, this voltage charges to C through W, when in case the charging voltage on the electric capacity reaches the silicon controlled trigger voltage, the controllable silicon conducting, this moment, capacitor C was discharged rapidly, controllable silicon turn-offs naturally, as seen whether the silicon controlled conducting, depend on whether capacitor C has trigger voltage, and the speed of conducting was directly proportional with the capacitor C charging interval, after capacitance is determined, as long as change potentiometer W, rent can change the charge constant of capacitor C, thus the size of the control angle of flow.The change of the angle of flow makes the voltage at load two ends also produce corresponding variation, reaches the purpose that bearing power is adjusted in control, and resistance R is in parallel with potentiometer W, plays the effect of a stable equilibrium, and inductance coil L is anti-interference.

Claims

1, a kind of electric blanket temperature autocontrol switch, it is characterized in that circuit board (1) is contained in the upper and lower casing (2), the double on and off K switch arranged above the housing, below the limit be potentiometer slider (4), the cursor slide side is the temperature groove, and cursor slide bottom is temperature indicator D2 and on/off indicator light D1.

2, electric blanket temperature autocontrol switch according to claim 1, it is characterized in that the left side is double on and off K switch contact on the circuit board, the upper right side is a capacitor C, in the right side potentiometer W, below C and W inductance coil L, resistance R, bidirectional trigger diode D, bidirectional triode thyristor G, turning right is resistance R 1 again, green LED D1, the most right-hand be resistance R 2, red light emitting diodes D2, circuit theory is that the double on and off K switch is connected on the power supply, inductance coil L is serially connected on the circuitry lines A, resistance R is in parallel with potentiometer W, B end and inductance coil and bidirectional triode thyristor G anode join, E end and bidirectional trigger diode D, capacitor C is joined, and the trigger electrode of bidirectional triode thyristor G and bidirectional trigger diode F end join, and silicon controlled negative electrode and capacitor H end join, parallel resistance R1 and light-emitting diode D1 between circuitry lines A and the N, parallel resistance R2 and light-emitting diode D2 between N and the H, R1 and D1 polyphone, R2 and D2 polyphone.