CN205139733U - Take heat retaining electric kettle circuit - Google Patents

Abstract

The utility model discloses an electric kettle circuit with heat preservation, which comprises switches K1, K2 and K3; an electric heating tube R1; a heating element R2; an AC connection between one end of the switch K1, one end of the heating element R2 and one end of the electric heating tube R1 The other end of the switch K1 is connected to one end of the switch K2 and the switch K3; the other end of the switch K3 is connected to the other end of the PTC heating element R2; the other end of the switch K2 is connected to the other end of the electric heating tube R1. Compared with the prior art, the utility model has the following advantages: the technical solution enables users to choose whether to keep warm on the basis of ordinary electric kettles, or to choose only the heat preservation operation, or the operation of heat preservation first and then heating. This makes the use of the electric kettle wider and more flexible in operation.

Description

An electric kettle circuit with heat preservation

technical field

The utility model relates to the field of electric heating devices, in particular to an electric kettle circuit with heat preservation.

Background technique

At present, electric kettles have become small household appliances widely used in ordinary families and units. Traditional electric kettles are generally provided with temperature sensors with bimetallic strips. Its working principle is: add an appropriate amount of water to the electric kettle, and then put the electric kettle on the power base; the user presses the power switch handle of the electric kettle, the electric kettle is connected to the power supply, and the heating device starts to heat the water; the water is heated and boiled. When boiling, the bimetal temperature sensor is deformed due to rising to the boiling temperature, and then the switch reed is driven by the sudden jump of the bimetal deformation, so that the switch is disconnected, the power supply of the electric kettle is cut off, and the power switch of the electric kettle is reset , the heating device no longer heats up.

Existing thermal insulation electric kettles usually adopt the method of heating first and then thermal insulation, and the control method is automatic control, so the user cannot choose whether to keep thermal insulation, nor can he perform the thermal insulation operation alone.

Contents of the invention

Aiming at the above-mentioned problems existing in the prior art, the utility model proposes an electric kettle circuit with heat preservation to solve the above-mentioned problems.

In order to achieve the above object, the utility model adopts the following technical solutions:

An electric kettle circuit with heat preservation, comprising switches K1, K2 and K3; an electric heating tube R1; a heating element R2; an AC connection between one end of the switch K1, one end of the heating element R2 and one end of the electric heating tube R1; the other end of the switch K1 One end is connected to switch K2 and one end of switch K3; the other end of switch K3 is connected to the other end of PTC heating element R2; the other end of switch K2 is connected to the other end of electric heating tube R1.

Preferably, the specific value of the alternating current is 100-250V.

Preferably, the switch K1 is an anti-dry protection switch; K1 is a 120-degree, 150-degree or 180-degree thermal bimetallic temperature control switch.

Preferably, K2 is a temperature control switch, and K2 is a 95-degree or 100-degree thermal bimetal temperature control switch.

The advantages of choosing a bimetal temperature control switch here are: the temperature control of the bimetal temperature controller is more accurate, the electrical performance is excellent, the production is simple, and it is cheap and practical.

Preferably, K3 is a manual self-locking switch.

By setting the manual self-locking switch K3, the heat preservation function can be started or turned off, and the electric kettle can be independently controlled.

Preferably, R1 is a nickel-chromium alloy wire electric heating tube with a stainless steel shell, an enameled steel tube shell nickel-chromium alloy wire electric heating tube, or a compressed aluminum shell nickel-chromium alloy wire electric heating tube.

Preferably, R2 is a PTC heating element, and the PTC heating element is specifically a 45-degree, 55-degree, 65-degree or 75-degree PTC plate heating element.

The advantage of using the PTC heating element here is: it can effectively prevent the fire hazard caused by dry burning and the automatic temperature control performance of the PTC heating element is absolutely reliable.

Compared with the prior art, the present invention has the following advantages:

The technical solution enables the user to choose on the basis of an ordinary electric kettle whether to keep warm or not, or to only choose to keep warm, or to heat first and then heat. This makes the use of the electric kettle wider and more flexible in operation.

Description of drawings

Fig. 1 is the circuit principle diagram of the electric kettle with heat preservation proposed by the utility model

detailed description

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail and completely.

As shown in the electric kettle circuit schematic diagram with heat preservation of the utility model proposed in Fig. 1, the electric kettle circuit with heat preservation of the utility model includes switches K1, K2 and K3; electric heating tube R1; heating element R2. The AC is connected between one end of the switch K1, one end of the PTC heating element R2 and one end of the electric heating tube R1. Here AC is used as the power input, and the specific value can be 100-250V; the other end of switch K1 is connected to one end of switch K2 and switch K3; the other end of switch K3 is connected to the other end of PTC heating element R2; the other end of switch K2 is connected to the electric heater The other end of the tube R1 is connected.

Here the switch K1 is an anti-dry protection switch, and specifically K1 may preferably be a thermal bimetal temperature control switch of 120 degrees, 150 degrees or 180 degrees. K2 is a temperature control switch. Specifically, K2 can preferably be a 95-degree or 100-degree thermal bimetal temperature control switch. The bimetal temperature control switch is composed of two or several layers of metal sheets with different thermal expansion coefficients, which can directly convert thermal energy into mechanical energy to switch on and off the circuit. The bimetal thermostat has more accurate temperature control, excellent electrical performance, simple manufacture, low price and practicality.

K3 is a manual self-locking switch. By setting the manual self-locking switch K3, the heat preservation function can be started or turned off, which can realize independent control of the electric kettle. The specific process is: press K3 to start the heat preservation function, and turn off K3 to turn off the heat preservation function.

R1 may preferably be a nickel-chromium alloy wire electric heating tube with a stainless steel shell, an enameled steel tube shell nickel-chromium alloy wire electric heating tube or a compressed aluminum shell nickel-chromium alloy wire electric heating tube.

R2 is preferably a PTC (Positive Temperature Coefficient) heating element, specifically a 45-degree, 55-degree, 65-degree or 75-degree PTC plate heating element. The use of PTC heating elements instead of heat pipes can effectively prevent the risk of fire due to dry burning. The dry burning temperature of the PTC heating element can be set at any temperature between 150°C and 250°C. When the temperature reaches the set temperature, the resistance of the PTC element will increase rapidly, and the heating power will drop sharply to keep the temperature at the set temperature. temperature does not continue to rise. The automatic temperature control performance of the PTC heating element is absolutely reliable. It relies on the resistance change in the PTC body to control the temperature instead of relying on any contact control.

The technical solution enables the user to choose on the basis of an ordinary electric kettle whether to keep warm or not, or to only choose to keep warm, or to heat first and then heat. This makes the use of the electric kettle wider and more flexible in operation.

Compared with the prior art, the utility model enables users to choose on the basis of ordinary electric kettles whether they need heat preservation, or only choose heat preservation operation, or first heat preservation and then heat operation. This makes the use of the electric kettle wider and more flexible in operation.

Claims (10)

1. the electric kettle circuit with insulation, is characterized in that: comprise K switch 1, K2 and K3; Electrothermal tube R1; Heater element R2; Alternating current connects one end of K switch 1 and between one end of heater element R2 and one end of electrothermal tube R1; The other end of K switch 1 is connected with K switch 2 one end with K switch 3; The other end of another termination PTC heater element R2 of K switch 3; The other end of K switch 2 is connected with the other end of electrothermal tube R1.

2. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described alternating current occurrence is 100 ~ 250V.

3. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described K switch 1 is anti-dry protection switch.

4. a kind of electric kettle circuit with insulation as claimed in claim 3, is characterized in that: described K1 is 120 degree, 150 degree or 180 degree of thermo bimetal's temperature detect switch (TDS)s.

5. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described K2 is temperature detect switch (TDS).

6. a kind of electric kettle circuit with insulation as claimed in claim 5, is characterized in that: described K2 is 95 degree or 100 degree of thermo bimetal's temperature detect switch (TDS)s.

7. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described K3 is manual self-lock switch.

8. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described R1 is stainless steel casing nichrome wire electrothermal tube, porcelain enamel steel tube shell nichrome wire electrothermal tube or compression aluminium shell nichrome wire electrothermal tube.

9. a kind of electric kettle circuit with insulation as claimed in claim 1, is characterized in that: described R2 is PTC heater element.

10. a kind of electric kettle circuit with insulation as claimed in claim 9, is characterized in that: described PTC heater element is 45 degree, 55 degree, 65 degree or 75 degree of board-like heater elements of PTC.