CN201147216Y

CN201147216Y - Electric heating kettle

Info

Publication number: CN201147216Y
Application number: CNU2008200432560U
Authority: CN
Inventors: 黄绍明
Original assignee: TIANJI ELECTRIC APPHIANCE CO Ltd GUANGDONG
Current assignee: Guangdong Tonze Electric Co Ltd
Priority date: 2008-01-19
Filing date: 2008-01-19
Publication date: 2008-11-12
Anticipated expiration: 2018-01-19

Abstract

The utility model provides an electrothermal kettle, which includes a kettle body, a kettle cover, a heating circuit, a temperature detecting component, and a control circuit, wherein, the heating circuit and the temperature detecting component are arranged in the kettle body, and the control circuit is respectively electrically connected with the heating circuit and the temperature detecting component. The electrothermal kettle is characterized in that the temperature detecting component is a thermistor. Compared with the prior art, the kettle has the advantages that the thermistor is used as the temperature detecting component, thereby the responding time of the temperature detecting component can be greatly shortened, the temperature can be quickly transmitted to the control circuit, and the electrothermal kettle can quickly cut off electricity; the kettle not only saves electrical energy, but also is applicable for heating milk and other liquids; in addition, an electronic component can be installed on a power supply base by a five-line spigotjoint, so that the electronic component is sheltered from the heating radiation of the heating circuit, and the property and the quality of the electronic component cannot be influenced, additionally, the functions for connecting the thermistor and controlling the circuit are fulfilled.

Description

Electric kettle

Technical field

The utility model relates to a kind of equipment that is used for adding hot water, more specifically to a kind of electric kettle.

Background technology

The most temperature controllers that adopt of existing electric kettle are boiled the back device of outage automatically as liquid, therefore after liquid is boiled, need could cut off the power supply automatically through the long period.

As Chinese patent literature CN2717351 " a kind of electric kettle temperature controller ", a kind of electric kettle temperature controller is disclosed, comprise insulation crust and insulation cover plate, be provided with metal shell foot in the housing with the corresponding connection of two poles difference, the metal shell foot inserts pin with the power supply of electric heater simultaneously and contacts cooperation, outside cover plate, be provided with metallic plate, plate is provided with respectively and the corresponding thermometal sheet of metal shell foot, be provided with the insulating bar that passes insulation cover plate between metal shell foot and thermometal sheet, metallic plate is provided with the hole of heat supply sensitized metal sheet effect insulating bar.

This technical scheme realizes overtemperature protection by the thermometal sheet, adopts the electric kettle of this temperature controller, will therefore relatively waste electric energy through outage automatically after at least 30 seconds after liquid is boiled, and has also increased the time of heating.In addition, because liquid will could cut off the power supply automatically through the long period after boiling, therefore this electric kettle can not be used for the heating of liquid such as milk, otherwise the liquid in the electric kettle can overflow.

Chinese patent literature CN2862906 " electric kettle of structure of controlling temperature " for another example, electric kettle, comprise the kettle body, on the bottom surface of kettle body, be provided with electric heater, on the bottom surface of kettle body, be mounted to rare two dry heating temperature controllers independently near the electric heater position, support is installed on the bottom surface, electric connector is installed on the support, dry heating temperature controller connects into control circuit by electric wire and electric heater and electric connector.

There is this shortcoming equally in this scheme: will could cut off the power supply automatically through the long period after liquid is boiled, therefore this electric kettle can not be used for the heating of liquid such as milk, otherwise the liquid in the electric kettle can overflow.

Summary of the invention

The purpose of this utility model is that prior art is improved, and a kind of electric kettle is provided, and can cut off the power supply rapidly, significantly shortens the time of detector unit reaction, and the technical scheme of employing is as follows:

Electric kettle of the present utility model comprises kettle body, pot lid, is located at heater circuit, detector unit in the kettle body and the control circuit that is electrically connected with heater circuit, detector unit respectively, and it is characterized in that: described detector unit is a thermistor.Replace temperature controller to detect the temperature of liquid in the kettle body with thermistor, no matter be the temperature of directly measuring liquid or measuring liquid by steam indirectly, because thermistor is faster to the reaction of temperature, can boil the back at liquid and just can pass the signal to control module in 10 seconds, automatically outage, thus reach power saving timesaving purpose.

A kind of scheme is measured the temperature of liquid in the kettle body indirectly by steam, and described thermistor is located at the top of kettle body madial wall.

Another kind of scheme is directly measured the temperature of liquid in the kettle body, and described thermistor is located at the bottom of kettle body madial wall.

For more accurate control heat time heating time, described control circuit comprises input/output interface module, detection module, temperature control module, AD modular converter (analog-to-digital conversion module), control module and DA modular converter (D/A converter module), the backstage control device is delivered to control module by input/output interface module with the target temperature of input, detection module is measured the thermistor sampled voltage, after being converted to the determinand Current Temperatures, the AD modular converter is input to control module, control module comparison object temperature and determinand Current Temperatures, and corresponding heating of output or refrigeration magnitude of voltage, this magnitude of voltage is converted to analog quantity by the DA modular converter and outputs to temperature control module, and this temperature control module will be controlled electric current and deliver to heater circuit.

Described heater circuit is connected external power supply with control circuit by five line couplings, and thermistor is by five wiring connector connection detection module.General electric kettle electronic component all is installed on the kettle body bottom, adopts five line couplings to be installed in electronic component on the power supply base, makes electronic component not be subjected to heat-generating disc heating radiation, therefore can not influence the performance and the quality of electronic component; General electric kettle all adopts three-way coupling to connect as energising, and this electric kettle adopts five line couplings on the basis of three-way coupling, can also connect thermistor and control circuit.

Described five line couplings comprise five line coupling plugs and the five line connector receptacles that cooperate with it, five line coupling plugs insert in the five line connector receptacles, external power supply is electrically connected heater circuit by five line coupling plugs and five line connector receptacles, and detection module is by five line coupling plugs and five line connector receptacles polyphone thermistor.

The utility model beneficial effect against existing technologies is, owing to adopt thermistor as detector unit, therefore can significantly shorten the time of detector unit reaction, communicate the temperature to control circuit rapidly, electric kettle can cut off the power supply rapidly, not only save electric energy, can also be applicable to the heating of liquid such as milk; And adopt five line couplings can electronic component be installed on the power supply base, and make electronic component not be subjected to the heating radiation of heater circuit, can not influence the performance and the quality of electronic component, and can play the effect that connects thermistor and control circuit.

Description of drawings

Fig. 1 is the structural representation of the utility model preferred embodiment;

Fig. 2 is the circuit theory diagrams of preferred embodiment shown in Figure 1;

Fig. 3 is the circuit block diagram of preferred embodiment shown in Figure 1;

Fig. 4 is the circuit block diagram of preferred embodiment control circuit shown in Figure 1.

The specific embodiment

Shown in Fig. 1-4, electric kettle in this preferred embodiment, comprise kettle body 1, pot lid 2, be located at heater circuit 3, detector unit 4 in the kettle body 1 and the control circuit 5 (being the visible part of control circuit 5 among Fig. 1) that is electrically connected with heater circuit 3, detector unit 4 respectively, described detector unit 4 is thermistor R.

In order directly to measure the temperature of liquid in the kettle body 1, described thermistor R is located at the bottom of kettle body 1 madial wall.

For more accurate control heat time heating time, described control circuit 5 comprises input/output interface module, detection module, temperature control module, the AD modular converter, control module and DA modular converter, the backstage control device is delivered to control module by input/output interface module with the target temperature of input, detection module is measured thermistor R sampled voltage, after being converted to the determinand Current Temperatures, the AD modular converter is input to control module, control module comparison object temperature and determinand Current Temperatures, and corresponding heating of output or refrigeration magnitude of voltage, this magnitude of voltage is converted to analog quantity by the DA modular converter and outputs to temperature control module, and this temperature control module will be controlled electric current and deliver to heater circuit.

Described heater circuit 3 is connected external power supply with control circuit 5 by five line couplings 6, and thermistor R is by five wiring connectors, 6 connection detection module.

Described five line couplings 6 comprise five line coupling plugs 61 and the five line connector receptacles 62 that cooperate with it, five line coupling plugs 61 insert in the five line connector receptacles 62, external power supply is electrically connected heater circuit 3 by five line coupling plugs 61 and five line connector receptacles 62, and detection module is by five line coupling plugs 61 and five line connector receptacles, 62 polyphone thermistor R.

The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; Be all equivalents of being done according to claim scope of the present utility model, be the utility model claim scope and cover.

Claims

1, a kind of electric kettle comprises kettle body, pot lid, is located at heater circuit, detector unit in the kettle body and the control circuit that is electrically connected with heater circuit, detector unit respectively, and it is characterized in that: described detector unit is a thermistor.

2, electric kettle as claimed in claim 1 is characterized in that: described thermistor is located at the top of kettle body madial wall.

3, electric kettle as claimed in claim 1 is characterized in that: described thermistor is located at the bottom of kettle body madial wall.

4, as claim 1 or 2 or 3 described electric kettles, it is characterized in that: described control circuit comprises input/output interface module, detection module, temperature control module, the AD modular converter, control module and DA modular converter, the backstage control device is delivered to control module by input/output interface module with the target temperature of input, detection module is measured the thermistor sampled voltage, after being converted to the determinand Current Temperatures, the AD modular converter is input to control module, control module comparison object temperature and determinand Current Temperatures, and corresponding heating of output or refrigeration magnitude of voltage, this magnitude of voltage is converted to analog quantity by the DA modular converter and outputs to temperature control module, and this temperature control module will be controlled electric current and deliver to heater circuit.

5, electric kettle as claimed in claim 4 is characterized in that: described heater circuit is connected external power supply with control circuit by five line couplings, and thermistor is by five wiring connector connection detection module.