Stove and method for preventing cooked material from being burnt dry

Abstract

A stove and a method for preventing a cooked material from being burnt dry are provided. The stove includes a stove body for heating the cooked material, a weighing unit for generating a weighing signal of the cooked material, a monitoring unit for judging whether the user is managing the cooked material, and a computing unit. The weighing signal is changed with time. A plurality of weighing signal change amounts respectively generated within a plurality of time intervals are calculate by the computing unit. According to the weighing signal change amounts, the heat source of the stove body is adjusted. Consequently, the function of preventing the cooked material from being burnt dry will be achieved.

What is claimed is: 
     
         1 . A stove for preventing a cooked material from being burnt dry, said stove comprising:
 a stove body for generating a heat source to heat said cooked material;   a weighing unit for sensing a weight of said cooked material, thereby generating a weighing signal correspondingly;   a monitoring unit in communication with said weighing unit for receiving said weighing signal and monitoring whether said cooked material is being managed by a user according to said weighing signal;   a computing unit in communication with said monitoring unit, wherein said weighing signal is changed with time, and a plurality of weighing signal change amounts respectively generated within a plurality of time intervals are calculated by said computing unit, wherein according to said weighing signal change amounts, a heat source adjusting signal is generated by said computing unit; and   a heat source controlling unit in communication with said computing unit for receiving said heat source adjusting signal and controlling a firepower level of said heat source according to said heat source adjusting signal, thereby preventing said cooked material from being burnt dry.   
     
     
         2 . The stove according to  claim 1  further comprising a control interface, wherein said firepower level of said heat source and a limit time duration are adjustable by said user via said control interface. 
     
     
         3 . The stove according to  claim 2 , wherein said monitoring unit judges whether said cooked material is being managed by said user by monitoring whether said control interface is operated, or said monitoring unit judges whether said cooked material is being managed by said user by monitoring whether said weighing signal is abruptly changed within a monitoring time interval. 
     
     
         4 . The stove according to  claim 1 , wherein the monitoring unit and the computing unit are integrated into a processing unit. 
     
     
         5 . The stove according to  claim 1  wherein each of said weighing signal change amounts denotes a weighing signal difference between two weighing signals generated at two time spots of a corresponding time interval, or each of said weighing signal change amounts denotes a percentage value of said weighing signal difference relative to an initial weighing signal. 
     
     
         6 . The stove according to  claim 1 , wherein according to a ratio between any two of said weighing signal change amounts, said computing unit generates said heat source adjusting signal. 
     
     
         7 . The stove according to  claim 1 , wherein the plurality of time intervals are a plurality of consecutive time intervals, or the plurality of time intervals comprises at least two discontinuous time intervals. 
     
     
         8 . The stove according to  claim 1 , wherein any two of the time intervals have different lengths, or any two of the time intervals have the same length. 
     
     
         9 . The stove according to  claim 1 , wherein the weighing unit is a mechanical weighing device or an electronic weighing device. 
     
     
         10 . The stove according to  claim 1 , wherein the stove is a gas stove, an electric stove, an electromagnetic oven or a microwave oven.