Sensor and control systems for food preparation

Patent metadata

Field	Value
Publication number	US-11609121-B2
Application number	US-201916416124-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 18, 2018
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

A temperature-regulating unit includes a base, a thermal element, a contactless sensing assembly, and a controller. The base is configured to support at least one of a pan or a food product. The thermal element is positioned to thermally regulate the at least one of the pan or the food product. The contactless sensing assembly is positioned to acquire sensor data regarding the at least one of the pan or the food product. The controller is configured to receive the sensor data from the contactless sensing assembly and adaptively control the thermal element based on the sensor data.

First claim

The invention claimed is:

1. A temperature-regulating unit comprising:
a base configured to support a pan;
a thermal element positioned to thermally regulate the pan, the thermal element including at least one of a heating element, a cooling element, or a dual functioning heating/cooling element;
a resonant tank having a sensing coil and a capacitor, wherein the resonant tank has a resonant frequency that is affected by a material of the pan and a temperature of the pan;
a contactless sensing assembly including at least one of one or more infrared sensors or one or more scanning devices, the contactless sensing assembly positioned on top of or elevated above the base to acquire sensor data regarding at least one of the pan or a food product; and
a controller configured to:
receive a temperature setting;
monitor the resonant frequency;
determine the material of the pan based on the resonant frequency;
determine the temperature of the pan based on the resonant frequency; and
adaptively control the thermal element based on the temperature of the pan, the material of the pan, and the temperature setting.

2. The temperature-regulating unit of claim 1 , further comprising a trivet configured to be positioned between a surface of the base and the pan, wherein the trivet is configured to insulate the surface from the pan, wherein the resonant frequency is affected by at least one of a presence of the trivet or a position of the trivet relative to a central axis of the sensing coil, and wherein the thermal element is positioned beneath the surface.

3. The temperature-regulating unit of claim 2 , wherein the controller is configured to at least one of:
detect the presence of the trivet and prevent activation of the thermal element in response to the trivet not being detected; or
detect the position of the trivet relative to the central axis of the sensing coil and control an output device to provide at least one of a visual indication or an audible indication to a user to assist the user in centering the trivet relative to the central axis of the sensing coil.

4. The temperature-regulating unit of claim 3 , wherein the controller is configured to:
detect the presence of the trivet; and
prevent activation of the thermal element in response to the trivet not being detected.

5. The temperature-regulating unit of claim 3 , wherein the controller is configured to:
detect the position of the trivet relative to the central axis of the sensing coil; and
control an output device to provide at least one of a visual indication or an audible indication to a user to assist the user in centering the trivet relative to the central axis of the sensing coil.

6. A temperature-regulating unit comprising:
a base configured to support a pan;
a resonant tank having an inductive heating coil positioned within the base and a capacitor, the inductive heating coil positioned to thermally regulate the pan, the resonant tank having a resonant frequency that is affected by a material of the pan and a temperature of the pan, the resonant tank configured to acquire first sensor data regarding the pan including the resonant frequency;
a contactless sensing assembly including at least one of one or more infrared sensors or one or more scanning devices, the contactless sensing assembly positioned on top of or elevated above the base to acquire second sensor data regarding at least one of the pan or a food product; and
a controller configured to:
receive the first sensor data from the resonant tank; and
adaptively control the inductive heating coil based on the first sensor data.

7. The temperature-regulating unit of claim 6 , wherein the controller is configured to:
monitor the resonant frequency to determine a material of the pan and a temperature of the pan; and
control the inductive heating coil based on the material and the temperature.

8. The temperature-regulating unit of claim 6 , wherein the controller is configured to:
monitor the resonant frequency to determine whether the pan is present; and
prevent activation of the inductive heating coil in response to determining that the pan is not present.

9. A temperature-regulating unit comprising:
a base configured to support at least one of a pan or a food product;
a thermal element positioned to thermally regulate the at least one of the pan or the food product, the thermal element including at least one of a heating element, a cooling element, or a dual functioning heating/cooling element;
a resonant tank having a sensing coil and a capacitor, wherein the resonant tank has a resonant frequency that is affected by a material of the pan and a temperature of the pan;
a contactless sensing assembly including at least one of one or more infrared sensors or one or more scanning devices, the contactless sensing assembly positioned on top of or elevated above the base to acquire sensor data regarding the at least one of the pan or the food product; and
a controller configured to:
receive the sensor data from the contactless sensing assembly; and
adaptively control the thermal element based on the sensor data.

10. The temperature-regulating unit of claim 9 , wherein the sensor data includes at least one of temperature data or identifying data, and wherein at least one of:
the contactless sensing assembly is configured to acquire the temperature data regarding a temperature of the at least one of the pan or the food product, and the controller is configured to adaptively control the thermal element based on the temperature; or
the contactless sensing assembly is configured to acquire the identifying data regarding a type of the food product, and the controller is configured to adaptively control the thermal element based on the type.

11. The temperature-regulating unit of claim 10 , wherein:
the sensor data includes the identifying data;
the contactless sensing assembly is configured to acquire the identifying data regarding the type of the food product; and
the controller is configured to adaptively control the thermal element based on the type.

12. The temperature-regulating unit of claim 10 , wherein:
the sensor data includes the temperature data and the identifying data;
the contactless sensing assembly is configured to:
acquire the identifying data regarding the type of the food product; and
acquire the temperature data regarding the temperature of the at least one of the pan or the food product; and

the controller is configured to adaptively control the thermal element based on the temperature and the type.

13. The temperature-regulating unit of claim 9 , wherein the sensor data includes wavelength data, wherein the contactless sensing assembly is configured to acquire the wavelength data regarding emitted wavelengths that are emitted by the thermal element or reflected wavelengths that are reflected by the food product, wherein the controller is configured to determine absorbed wavelengths that are absorbed by the food product based on the emitted wavelengths and the reflected wavelengths, and wherein the controller is configured to adjust the emitted wavelengths of the thermal element to the absorbed wavelengths.

14. The temperature-regulating unit of claim 9 , further comprising an overhead support coupled to the base and positioned to extend over the at least one of the pan or the food product, wherein at least one of the thermal element or the contactless sensing assembly is supported by the overhead support.

15. The temperature-regulating unit of claim 14 , wherein the thermal element and the contactless sensing assembly are supported

Assignees

• Hatco Corp

Inventors

• Bassill Nick
• Scanlon John
• Shang Fei
• Shah Ishan
• Gilpatric Mark
• Rolston Dave
• Yu Ronghua

Classifications

• H05B2213/07

  Heating plates with temperature control means · CPC title

• A21B1/40

  characterised by the means for regulating the temperature · CPC title

• G01J5/047

  Mobile mounting; Scanning arrangements · CPC title

• F24C7/087 Primary

  of electric circuits regulating heat · CPC title

• G01J3/42

  Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08) · CPC title