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Method for heating water in electric kettle

A technology for heating water and electric kettles, which is applied to water boiling appliances, position/direction control, non-electric variable control, etc., and can solve problems such as reading errors that are not considered

Inactive Publication Date: 2004-07-07
BRAUN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also does not take into account reading error, that is, the difference between the temperature measured by the temperature sensor and the actual system temperature

Method used

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  • Method for heating water in electric kettle
  • Method for heating water in electric kettle
  • Method for heating water in electric kettle

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0034]figure 1 Shows a perspective view of an advantageous embodiment of an electric kettle 1 suitable for carrying out the method of the invention, for heating liquids. The electric kettle 1 comprises a body part 2, preferably made of heat-retaining thermoplastic material or stainless steel. Below the body part 2 is a substantially cylindrical base 4 housing the heating element comprising several heating cells, and an electronic regulator (neither shown).

[0035] Arranged on the underside of the jug base 4 is a saucer-shaped bottom plate 3 comprising a circular bottom area. The bottom plate 3 contains wires 12 and an inductive interface (not shown), which is arranged at the center of the bottom plate 3 for contactless current transmission. The electric kettle 1 can be lifted from the bottom plate 3 completely.

[0036] On the upper end of the truncated conical elongated electric kettle 1, a pot cover 9 is set, and a pouring spout 11 is exposed on one side of the pot cover ...

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PUM

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Abstract

The invention relates to an electric kettle which comprises a kettle, a temperature sensor, a device for adjusting the target temperature TZiel and an electronic regulator. For heating water, the following steps are carried out: measuring the start temperature TStart; determining the heat capacity Csys of the system; calculating a temperature difference DELTA TSZ from a preselected target temperature TZiel and the measured start temperature TStart; if the temperature difference DELTA TSZ is equal DELTA Tklein, the electric kettle is heated up at a reduced capacity Pred for a calculated period of time DELTA Tred; or, if the temperature difference DELTA TSZ is greater than DELTA Tklein, the electric kettle is heated up in a regulated manner, the regulator calculating a temperature Tend that can be measured on the temperature sensor, and the heating process is ended when this temperature is reached. The inventive method prevents thermal overshoot during heating of a thermal capacity that is caused when the heating is switched off too late. The inventive method further takes into consideration the time delay between the point in time when the heating is switched on and when a temperature increase on the sensor can be detected.

Description

technical field [0001] The invention relates to a method for heating water in an electric kettle according to the features of claim 1 . Background technique [0002] Methods of heating water in kettles are known in the prior art. [0003] For example, according to European patent application EP 0 380 369 A1, during the heating of water, the change in temperature over time is measured. The point at which the boiling temperature is reached is identified when the temperature over time drops or reaches zero. When the boiling point is reached, the water will not continue to heat unless additional energy is added, because at this temperature a phase change occurs in water, from a liquid state to a gaseous state. The supplemental energy is used to meet the potential thermal energy requirements of the phase transition in water. [0004] In the method described above, the change in temperature versus time is used to infer when the water has reached its boiling point. For detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/00A47J27/21G05D23/20
CPCA47J27/21083G05D23/20
Inventor 弗兰克·克雷斯曼
Owner BRAUN GMBH