CN2166571Y - Power-off anti-firing controlling device for electric heating elements in liquid - Google Patents

Abstract

The utility model discloses a power-off and anti-firing controlling device for electric heating elements in liquid, which comprises an element for electric heating, a temperature control element, a sound circuit and a control circuit. The utility model is characterized in that the temperature control element contacts with the element for electric heating close through a metal plate. The utility model has the advantages of sensitive temperature control, automatic power off and anti-firing function. The utility model is suitable for temperature control and power-off protection of the electric heating in water or liquid in families, factories, enterprises, etc.

Description

Power-off anti-firing controlling device for electric heating elements in liquid

The utility model belongs to the temperature control power-down control device that the liquid electric heating heats up.

The existing temperature regulating device that liquid is heated up with electric heating; as notification number is 2036388; name is called the utility model patent of " electronics alarm for boiling water "; it is the electronic alarm that constitutes by temperature detect switch (TDS) and sounder; can when opening, water report to the police; but it can not cut off power supply, does not possess defencive function, easily burns heating element.

The purpose of this utility model is, provides a kind of when electric heating liquid reaches uniform temperature, can report to the police, and can cut off power supply again, can prevent that again dry combustion method from damaging the control device of heating element.

The utility model can be realized with following mode:

The utility model comprises electrical heating elements, temp-controlling element, acoustics circuit and control circuit, control circuit repeat circuit coil J ₁Be connected in series electrical heating elements and relay normally-closed contact J with temp-controlling element _1-1Be connected in series normally opened contact J _1-2Be connected in the power supply loop of acoustics circuit; Closely contact through a metallic plate between temp-controlling element and the heating element.

Temp-controlling element places sealed metal tube.

Good effect of the present utility model:

Temp-controlling element is sealed in the metal tube; can immerse in the liquid jointly with heating element; controlling heated liquid cuts off the power supply when uniform temperature automatically; electric heating element is not by liquid-immersed and when heating mistake energising can prevent to burn electric heating element; temp-controlling element is immersed in the transformer oil can avoid arcing; protect its contact jaw surface, prolong its useful life.

Fig. 1 is the utility model control circuit electrical schematic diagram;

Fig. 2 is a temp-controlling element mechanical structure schematic diagram;

Fig. 3 is the example structure schematic diagram;

Fig. 4 is Fig. 3 A-A cutaway view.

Embodiment is described in detail in detail down in conjunction with the accompanying drawings:

With the insulating pot is example, temp-controlling element 3 is made up of thimble 4 and bimetal leaf 6,5 is the stiff end of bimetal leaf, temp-controlling element 3 places sealed metal tube to be full of transformer oil in it, does heat transfer medium, and avoids producing arcing, closely contact through an aluminium sheet 2 between temp-controlling element 3 and the electrical heating elements 1, be fixed in the insulating pot A, B termination 220V AC power in the control circuit, the CR among electrical heating elements 1(Fig. 1 jointly) with the normally-closed contact J of relay _1-1Be connected in series the CW among the direct-current power supply temp-controlling element 3(Fig. 1 after step-down rectifier, voltage stabilizing) and the acoustics circuit operating voltage, temp-controlling element 3 and relay coil J ₁Be connected in series relay normally open contact J ₁-2 with diode D ₆Be connected in series, when water boiled, bimetal leaf 6 produced deformation, contacts the actuating of relay, normally-closed contact J with thimble 4 _1-1Disconnect J _1-2Closed; music integrated circuit IC work; send music, remind the user to cut off A, B end power supply, when anhydrous in the kettle and user's mistake adds electric heating; because electrical heating elements 1 tightly contacts through an aluminium sheet 2 with temp-controlling element 3; both temperature are very nearly the same, equally when the temperature rise of electrical heating elements 1 reaches water and boils temperature, and temp-controlling element 3 actions; cut off the power supply of electrical heating elements 1, protection electrical heating elements 1 is not burnt.

The adjustment of the operating temperature of temp-controlling element 3 is by the knob of adjusting among Fig. 27, determines by the cold conditions gap between screw thread 8 adjustment thimbles 4 and the bimetal leaf 6.

The utility model can be used for electric heating temperature control, outage and the anti-dry protection to any liquid.

Claims (3)

1, electric heating element outage control device preventing dry fry in a kind of liquid comprises electrical heating elements, temp-controlling element, acoustics circuit and control circuit, it is characterized in that:

A control circuit repeat circuit coil J ₁Be connected in series electrical heating elements and relay normally-closed contact J with temp-controlling element _1-1Be connected in series the normally opened contact J of relay _1-2Be connected in the power supply loop of acoustics circuit.

Closely contact through a metallic plate between b temp-controlling element and the heating element.

2, control device according to claim 1, it is characterized in that: temp-controlling element places sealed metal tube.

3, control device according to claim 2 is characterized in that: be full of transformer oil in the sealed metal tube.

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