CN2131246Y

CN2131246Y - power regulator for household electrothermic and electro-optic apparatuses

Info

Publication number: CN2131246Y
Application number: CN 92224251
Authority: CN
Inventors: 王旭辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-30
Filing date: 1992-05-30
Publication date: 1993-04-28
Anticipated expiration: 2002-05-30

Abstract

The utility model relates to a power regulator for household electrothermal and photovoltaic appliances, which is composed of a casing bottom board, a radiator, an input plug, an output socket, a controlled silicon circuit, etc. One voltage dependent resistor is connected with controlled silicon in parallel to be used as a protective element for the regulator and a controlled electric appliance when the voltage of a power supply exceeds a value. One thermal resistor or one thermal switch is connected in a control circuit in series, the control circuit is composed of resistors and capacitors, output signals of the capacitors are switched with the G pole of the controlled silicon through another thermal resistor and one triple-pole trigger valve, and a twofold overload protection circuit of the controlled silicon is formed. A zero curve of the power supply is connected with a circuit, and a fire wire and a ground lead are led to the output end of the regulator. The utility model has small volume and simple circuits, can realize the stepless regulation of the power of controlled electrothermal (photovoltaic) appliances and can protect self safety and the safety of controlled electric appliances simultaneously when the voltage of a power supply exceeds a value or electric appliances with high power are switched by mistakes.

Description

power regulator for household electrothermic and electro-optic apparatuses

The utility model is a kind of utensil of domestic electric heating electric light appliance power step-less adjustment.

Household electrical appliance are electric heating appliance especially, as electric furnace, electric stove, electric cup, roaster etc., having does not much have power adjustments, even have, is the formula of transferring the files yet, have the level, what temperature was selected is limited in scope, and can only be several points, and this have the merit of level to transfer device electric heater neither easy to use, simultaneously cause waste of electric energy again, when supply voltage is too high, also can burn electrical equipment.

Task of the present utility model is that to propose a kind of volume little, and circuit is simple, can carry out stepless power and regulate, and guaranteed again electric heating electric light utensil and this are in the supply voltage power governor that Shi Buhui damages that overflows, to overcome shortcoming of the prior art simultaneously.

This power governor that the utility model proposes is mainly by shell, base plate, attaching plug, radiator, accessory power outlet and electronic circuit constitute, and shell and base plate adopt the plastic pressure injection moulding, corresponding screw hole and screwed hole are arranged, so that assembling resembles elements such as socket, radiator and circuit above them.

Circuit of the present utility model is formed: in parallel with controllable silicon with a piezo-resistance; the magnitude of voltage of piezo-resistance action is higher than normal supply voltage value; be lower than the controllable silicon breakdown voltage value; when supply voltage overflows; piezo-resistance action (conducting), thereby the safety of protection main electronic component of adjuster and controlled electrical equipment.For make controllable silicon can overload the time heating damage, adopt a thermoswitch or thermistor to be connected in the control circuit, and the output signal of electric capacity by another thermistor and three grades of trigger tubes as silicon controlled conditioning signal source (the access G utmost point).When user's improper use or other reasons cause controlled appliance power to surpass the adjuster maximum power, the thermoswitch open-circuit line, controllable silicon turn-offs, or the thermistor action makes adjuster reduce power output, disappears until the overload phenomenon.

The utility model can carry out step-less adjustment to the power of controlled electric heating or electric light utensil by the resistance of regulating variable potentiometer, when it disconnects with controlled electrical equipment, joins with zero-power line, and itself is not charged, no power consumption.

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

Accompanying drawing 1 is a stereogram of the present utility model.

Accompanying drawing 2 is the utility model shell front views.

Accompanying drawing 3 is the utility model shell left views.

Accompanying drawing 4 is the utility model shell vertical views.

Accompanying drawing 5 is the utility model base plate front views.

Accompanying drawing 6 is the utility model base plate left views.

Accompanying drawing 7 is the utility model base plate vertical views.

Accompanying drawing 8 is the utility model radiator views.

Accompanying drawing 9 is the utility model radiator left views.

Accompanying drawing 10 is the utility model radiator vertical views.

Accompanying drawing 11 is first kind of circuit diagram of the present utility model.

Accompanying drawing 12 is second kind of circuit diagram of the present utility model.

In the accompanying drawing 1 to 10: attaching plug (1) and lead (2) are general commercially available prod, and when using in relatively-stationary place, available mode direct and that power line joins replaces.(3) being base plate, is a plastic plate, and four jiaos have the screw hole that fixes with shell (4), and there is outstanding head at two, on the head screw hole is arranged, and is used for fixing whole adjuster.Shell (4) is with the manufacturing of high temperature insulation plastics, have the heat radiation hole pattern of heat radiation grid (5) and side in the above, also have chute (6) for variable potentiometer slide block slidable adjustment, and the eyelet of accessory power outlet (8), be carved with or post the direction mark that indicates watt level near the chute (6).The original paper of electronic circuit mainly is a controllable silicon, pressure-sensitive, thermistor, and trigger tube, variable resistor, electric capacity etc. are less than 15 elements.With being used for that aluminum is done with contacted radiator of thermistor and said elements, all to install in the enclosure, whole adjuster overall dimension is below 130 * 80 * 50(mm).

First kind of circuit working process shown in the accompanying drawing 11 is as follows:

Behind the power connection; adjuster is in dormant state; behind controlled electric heating or electric light utensil access adjuster; adjuster main power source and control power supply are started working; by regulating variable potentiometer RP; the capacitor C discharge rate is changed; when charging voltage reaches the trigger voltage of three utmost point trigger tube SBS; controllable silicon Vc begins conducting, and the adjuster power output changes the potentiometer resistance value; it is the controlled electric heating electric light of scalable appliance power; when supply voltage overflows, piezo-resistance Rv action, thereby the safety of protection adjuster itself and controlled electrical equipment.When the power of controlled electric heating (light) utensil surpasses adjuster power (as user's improper use; when high-power electric appliance is inserted adjuster); be installed in the action of thermoswitch on the radiator or thermistor, disconnect or reduce the adjuster power output, thereby protected the safety of adjuster itself.

R in the circuit ₁Be the protective resistance of RP, Rt ₁With KT be respectively thermistor and thermoswitch (dotting), only get one in the use, require the open circuit protection time use the latter, require to reduce to use the former, Rt when power is protected ₂Act on same Rt ₁, protect thermistor in support.By diode D ₁, D ₂, resistance R ₂The capacitor C discharge loop of three element compositions is used for enlarging adjuster low side adjustable range, only uses at regulation and control electric light utensil, and electric heating appliance is not had this necessity, can cancel.Xp is a three-terminal polarized plus plug, and Wp is single-phase three core insulation lines, and Xs is single-phase three utmost point accessory power outlets, and Vc is a bidirectional triode thyristor, and power generally by present household electrical appliances watt level, is chosen 0 ┈ 3KW.The specification of other elements is as follows in this example:

Rt ₁55 ℃ of normal temperature 1K of RTC Curie point Ω

Rt ₂55 ℃ of normal temperature 20 Ω of RTC Curie point

Rv MYJ31 360V

RP 0┈500KΩ

R ₁1W 1.2KΩ

R ₂1W 30┈50KΩ

D ₁1N4007

D ₂1N4007

KT 55℃ 0.5┈2A 250V

C 0.1┈0.15μ 400V

Second kind of circuit shown in the accompanying drawing 12 and first kind are basic identical, have just adopted diac to replace trigger triode, and its effect is basic identical, generally uses when smaller power, and is comparatively economical as using on the following adjuster of 1.5KW.

Claims

1, a kind of domestic electric heating, electric light appliance power adjuster have shell (4), base plate (3), and radiator (9) and ghyristor circuit is characterized in that described ghyristor circuit is by a controllable silicon Vc and piezo-resistance Rv in parallel with it, thermistor Rt ₁, protective resistance R ₁, adjustable potentiometer RP and capacitor C constitute, and the output signal of capacitor C is passed through one two utmost point trigger tube SBS and another thermistor Rt ₂The back is connected with the controllable G utmost point, and electronic circuit and uncharged zero-power line join, and live wire is directly guided to the output of adjuster.

2, by the described power governor of claim 1, it is characterized in that the operating value of piezo-resistance Rv is higher than the supply voltage normal value, be lower than the controllable silicon breakdown voltage value.

3,, it is characterized in that being provided with in the electronic circuit diode D that are intended to enlarge the low side adjustable range by two reverse connections by the described power governor of claim 1 ₁, D ₂And resistance R ₂The capacitor discharge loop of forming.

4, by the described power governor of claim 1, it is characterized in that thermistor Rt ₁Can replace mutually with thermoswitch KT, also available two utmost point trigger tube Vs of three utmost point trigger tube SBS replace.