Food preparation device with overpressure detection

Patent metadata

Field	Value
Publication number	US-11344159-B2
Application number	US-201816213414-A
Country	US
Kind code	B2
Filing date	Dec 7, 2018
Priority date	Dec 12, 2017
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

The invention concerns a food preparation device 1 comprising a food preparation pot 2 , a heating element 3 for heating food 4 in the food preparation pot 2 , a tool 5 for blending and/or comminuting food 4 in the food preparation pot 2 , a lid 6, 7 for the food preparation pot 2 , and an electric motor 8 for rotating the tool 5 . A monitoring unit monitors a power input of the electric motor 8 for detecting an overpressure in the food preparation pot 2 . The invention also concerns a method and a computer program product. A very reliable detection of overpressure can thereby be enabled.

First claim

The invention claimed is:

1. A food preparation device comprising
a food preparation pot,
a heating element for heating food in the food preparation pot,
a tool for blending and/or comminuting food in the food preparation pot,
a lid for the food preparation pot, and
an electric motor for rotating the tool, wherein the food preparation device further comprises a monitoring unit configured to monitor a power input of the electric motor and to detect an overpressure in the food preparation pot based at least in part on the monitored power input, wherein the overpressure comprises vapor pressure inside the food preparation pot being greater than ambient pressure.

2. The food preparation device of claim 1 , wherein the monitoring unit is configured to modify a food preparation parameter and/or a recipe for food based on the monitored power input of the electric motor.

3. The food preparation device of claim 1 , wherein the food preparation device is configured such that, during operation, a notification for the user is provided based on the monitored power input of the electric motor.

4. The food preparation device of claim 1 , wherein the food preparation device is configured such that, during operation, a locking unit for the lid is engaged or disengaged based on the monitored power input of the electric motor.

5. The food preparation device of claim 1 , wherein the food preparation device is configured such that, during operation, an overpressure is detected by comparing the monitored power input of the electric motor before and after a boiling point (t S ) of a liquid or a selected temperature in the food preparation pot has been exceeded.

6. The food preparation device of claim 1 , wherein the food preparation device is configured such that, during operation, the monitoring unit monitors the power input of the electric motor for the detection of an overpressure in the food preparation pot only when a minimum temperature in the food preparation pot is reached.

7. The food preparation device of claim 1 , wherein the monitoring unit is configured such that a monitoring event is output by the monitoring unit when a monitoring value, which is determined based on the monitored power input of the electric motor, reaches a detection threshold (M).

8. The food preparation device of claim 7 , wherein the monitoring value corresponds to a moving average value (K g ), a variation amplitude (K A ) and/or a fundamental frequency (K F ) of the captured power input of the electric motor.

9. The food preparation device of claim 7 , wherein the detection threshold (M) is a travelling threshold or an absolute threshold.

10. The food preparation device of claim 7 , wherein the food preparation device is configured such that, during operation, the detection threshold (M) is determined based on the monitored power input of the electric motor after a minimum temperature has been reached and/or before a maximum temperature or a boiling point (t S ) has been reached.

11. The food preparation device of claim 7 , wherein that the food preparation device is configured such that, during operation, only after a selected temperature or the boiling point (t S ) has been reached, it is determined for monitoring the monitoring event whether the monitoring value reaches the detection threshold (M).

12. The food preparation device of claim 1 , wherein the power input is determined through the motor current (I) for the electric motor.

Assignees

• Vorwerk Co Interholding

Inventors

• Mosebach Andrej
• Frielinghaus Robert

Classifications

• A47J27/004 Primary

  with integral electrical heating means (drinking cups with integral heating means A47J36/2466) · CPC title

• A47J43/0761 Primary

  for machines with tools driven from the lower side · CPC title

• A47J27/0804

  Locking devices · CPC title

• A47J27/0802

  Control mechanisms for pressure-cookers · CPC title

• A47J43/0716

  for machines with tools driven from the lower side (A47J43/0727 - A47J43/08 take precedence) · CPC title