CN-122029934-A - Cooking appliance and control method thereof

CN122029934ACN 122029934 ACN122029934 ACN 122029934ACN-122029934-A

Abstract

The cooking appliance includes a cooking plate, a container sensing circuit including a container sensing coil and at least one switch allowing a flow of an input current inputted to the container sensing coil and a flow of an output current outputted from the container sensing coil, wherein the container sensing circuit determines a position or type of the cooking container on the cooking plate while the at least one switch is controlled to allow a flow of the input current and a flow of the output current, a heating coil disposed below the cooking plate and generating a magnetic field that can be extended to the cooking plate and the container sensing circuit based on a supply of driving power, and a control unit controlling the at least one switch to allow the flows of the input current and the output current for a predetermined time corresponding to each predetermined period of a driving frequency of the driving power while the driving power is supplied to the heating coil.

Inventors

JIN DAXUAN
JIN JINGHUAN
ZHENG QINGXUN
YU YINGXUN

Assignees

三星电子株式会社

Dates

Publication Date: 20260512
Application Date: 20241119
Priority Date: 20240105

Claims (15)

1. A cooking apparatus comprising: A cooking plate; a container detection circuit comprising: container detection coil, and At least one switch controllable to allow flow of an input current into the container detection coil and flow of an output current from the container detection coil, wherein the container detection circuit is configured to detect a position or type of a cooking container on the cooking plate while the at least one switch is controlled to allow flow of an input current into the container detection coil and flow of an output current from the container detection coil; A heating coil below the cooking plate and configured to generate a magnetic field extending through the cooking plate and the container detection circuit based on a driving power having a driving frequency being applied to the heating coil, and And a controller configured to control the at least one switch such that a flow of an input current into the container detection coil and a flow of an output current from the container detection coil are allowed for a specified time at each of a plurality of predetermined periods corresponding to the driving frequency while the driving power is applied to the heating coil.
2. The cooking appliance of claim 1, wherein the container detection circuit further comprises an analog-to-digital (a/D) converter configured to convert a value of the output current from the container detection coil to a digital signal.
3. The cooking device of claim 1, wherein The container detection coil includes a plurality of container detection coils, and The container detection circuit further includes a multiplexer controllable to allow a flow of each of a plurality of input currents respectively corresponding to a plurality of container detection coils to be sequentially input to each of the plurality of container detection coils.
4. A cooking device according to claim 3, wherein The plurality of container detection coils includes a first container detection coil and a second container detection coil, and The multiplexer may be controlled to allow a flow of a first input current corresponding to the first container detection coil to be input to the first container detection coil and then to allow a flow of a second input current corresponding to the second container detection coil to be input to the second container detection coil.
5. The cooking device of claim 2, wherein The container detection coil includes a plurality of container detection coils, and The container detection circuit further includes a multiplexer controllable to allow a flow of each of a plurality of output currents respectively corresponding to the plurality of container detection coils to be sequentially output to the a/D converter.
6. The cooking apparatus of claim 5, wherein the plurality of container detection coils comprises a first container detection coil and a second container detection coil, and The multiplexer may be controlled to allow a flow of a first output current corresponding to the first container detection coil to be output to the a/D converter, and then to allow a flow of a second output current corresponding to the second container detection coil to be output to the a/D converter.
7. The cooking device of claim 1, wherein The container detection circuit further includes a zener diode circuit configured to connect a first node through which a flow of the input current flows and a second node through which a flow of the output current flows, and The zener diode circuit includes a first zener diode having a first cathode connected to the first node and a first anode connected to the ground node and a second zener diode having a second cathode connected to the second node and a second anode connected to the ground node.
8. The cooking apparatus of claim 1, wherein the controller is configured to determine each of the plurality of predetermined periods based on a drive frequency.
9. The cooking apparatus of claim 1, wherein the controller is configured to control the at least one switch based on receiving a heating execution command for heating a cooking container on a cooking plate.
10. The cooking device of claim 1, further comprising: A coil assembly below the cooking plate and including a first layer, an insulating layer below the first layer, and a second layer below the insulating layer, Wherein the container detection coil is in a first layer and the heating coil is in a second layer.
11. A method of controlling a cooking apparatus comprising a cooking plate, a vessel detection circuit comprising a vessel detection coil, and at least one switch controllable to allow flow of an input current into the vessel detection coil and flow of an output current from the vessel detection coil, wherein the vessel detection circuit is configured to detect a position or type of a cooking vessel on the cooking plate while the at least one switch is controlled to allow flow of an input current into the vessel detection coil and flow of an output current from the vessel detection coil, and the cooking apparatus further comprises a heating coil below the cooking plate and configured to generate a magnetic field extending through the cooking plate and the vessel detection circuit based on a driving power having a driving frequency being applied to the heating coil, the method comprising: Applying driving power to the heating coil, and The at least one switch is controlled such that a flow of an input current into the container detection coil and a flow of an output current from the container detection coil are allowed for a specified time at each of a plurality of predetermined periods corresponding to the driving frequency while the driving power is applied to the heating coil.
12. The method of claim 11, wherein the container detection circuit further comprises an analog-to-digital (a/D) converter, the method further comprising: the value of the output current from the container detection coil is converted into a digital signal by an a/D converter.
13. The method of claim 11, wherein the container detection coil comprises a plurality of container detection coils, and the container detection circuit further comprises a multiplexer, the method further comprising: A multiplexer is controlled to allow a flow of each of a plurality of input currents respectively corresponding to the plurality of container detection coils to be sequentially input to each of the plurality of container detection coils.
14. The method of claim 13, wherein the plurality of container detection coils comprises a first container detection coil and a second container detection coil, the method further comprising: The multiplexer is controlled to allow a flow of a first input current corresponding to the first container detection coil to be input to the first container detection coil and then to allow a flow of a second input current corresponding to the second container detection coil to be input to the second container detection coil.
15. The method of claim 12, wherein the container detection coil comprises a plurality of container detection coils, and the container detection circuit further comprises a multiplexer, the method further comprising: The multiplexer is controlled to allow a flow of each of a plurality of output currents respectively corresponding to the plurality of container detection coils to be sequentially output to the a/D converter.

Description

Cooking appliance and control method thereof Technical Field The present disclosure relates to a cooking appliance including a container detection circuit for detecting a cooking container and a method of controlling the same. Background A cooking appliance is a device for heating a cooking object such as food, and refers to a device capable of providing various functions related to cooking of the cooking object such as heating, thawing, drying, and sterilizing. Examples of cooking appliances may include cooktops that use electricity or gas to heat a cooking vessel containing food. The cooking appliance may include a device for heating the cooking container using an eddy current generated by applying driving power to the heating coil. Recently, technologies including a container detecting circuit that detects when a container is placed on a cooking plate and identifies a position of the cooking container on the cooking plate or a type of the cooking container based on a signal output from the container detecting circuit have been developed. However, when a driving current is applied to the heating coil to heat the cooking vessel, a magnetic field or induced electromotive force generated thereby may have an influence on the vessel detection circuit, thereby preventing accurate detection of the cooking vessel on the cooking plate. Disclosure of Invention [ Problem ] The present disclosure may provide a cooking appliance capable of detecting a cooking container on a cooking plate without being affected by an induced electromotive force generated from a heating coil, and a control method thereof. Technical objects of the present invention are not limited to the above, and other objects not described above will become apparent to those of ordinary skill in the art based on the following description. [ Technical solution ] According to the present disclosure, a cooking appliance may include a cooking plate, a container detection circuit including a container detection coil and at least one switch controllable to allow a flow of an input current into the container detection coil and a flow of an output current from the container detection coil, wherein the container detection circuit is configured to detect a position or type of a cooking container on the cooking plate while the at least one switch is controlled to allow the flow of the input current into the container detection coil and the flow of the output current from the container detection coil, a heating coil located below the cooking plate and configured to generate a magnetic field extending through the cooking plate and the container detection circuit based on a driving power having a driving frequency being applied to the heating coil, and a controller configured to control the at least one switch such that the flow of the input current into the container detection coil and the flow of the output current from the container detection coil are allowed for a specified time at each of a plurality of predetermined periods corresponding to the driving frequency while the driving power is applied to the heating coil. The container detection circuit may further include an analog-to-digital (a/D) converter, which may be configured to convert a value of the output current from the container detection coil into a digital signal. The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that may be controllable to allow a flow of each of a plurality of input currents respectively corresponding to the plurality of container detection coils to be sequentially input to each of the plurality of container detection coils. The plurality of container detection coils may include a first container detection coil and a second container detection coil, and the multiplexer may be controllable to allow a flow of a first input current corresponding to the first container detection coil to be input to the first container detection coil and then allow a flow of a second input current corresponding to the second container detection coil to be input to the second container detection coil. The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that may be controllable to allow a flow of each of a plurality of output currents respectively corresponding to the plurality of container detection coils to be sequentially output to the a/D converter. The plurality of container detection coils may include a first container detection coil and a second container detection coil, and the multiplexer may be controllable to allow a flow of a first output current corresponding to the first container detection coil to be output to the a/D converter and then allow a flow of a second output current corresponding to the second container detection coil to be output to the a/D converter. The container detection ci