Gas cooking device and method for controlling flame size

Abstract

A gas cooking device comprises a burner, a gas feed tube, a control valve used to control a gas flow, an electromagnetic generating device capable of generating an electromagnetic signal, and a control unit capable of controlling an opening size of the control valve according to the electromagnetic signal. The control valve and the electromagnetic generating device are electrically connected to the control unit respectively. By employing the control valve, the control unit, and the electromagnetic generating device, control of a flame size of the gas cooking device can be realized.

1 . A gas cooking device, comprising a burner, a gas feed tube and a control valve used to control a gas flow, wherein the gas cooking device is further provided with an electromagnetic generating device capable of generating an electromagnetic signal and a control unit capable of controlling an opening size of the control valve, and the control valve and the electromagnetic generating device are connected to the control unit respectively. 
     
     
         2 . The gas cooking device according to  claim 1 , wherein a temperature control layer capable of inducing the electromagnetic signal generated by the electromagnetic generating device is arranged above or on a side of the electromagnetic generating device. 
     
     
         3 . The gas cooking device according to  claim 2 , wherein the temperature control layer has a magnetic permeability of 2,000 to 200,000 H/m and a resistivity of 30 to 130 μΩ·cm. 
     
     
         4 . The gas cooking device according to  claim 1 , wherein two to six gas feed tubes are provided, and each of the gas feed tubes is provide with a control valve; or,
 the gas feed tube is composed of two to six sub-tubes, and each of the sub-tubes is provided with a control valve.   
     
     
         5 . The gas cooking device according to  claim 1 , wherein the control unit comprises a detection analysis module and a control module, wherein
 the detection analysis module is connected to the electromagnetic generating device and used to detect a change of an electric parameter of the electromagnetic generating device, compare a detection value with an initial set value, and feed back an analysis result to the control module; and   an input end of the control module is connected to the detection analysis module, an output end of the control module is connected to the control valve, and the control module adjusts the gas flow through the control valve according to the analysis result to keep a temperature of a temperature control layer within a preset interval.   
     
     
         6 . The gas cooking device according to  claim 1 , wherein a cooking utensil is arranged above the burner, and a temperature control layer capable of inducing the electromagnetic signal generated by the electromagnetic generating device is arranged on the cooking utensil. 
     
     
         7 . The gas cooking device according to  claim 6 , wherein the temperature control layer forms at least a part of the cooking utensil. 
     
     
         8 . The gas cooking device according to  claim 2 , wherein the temperature control layer is sheet, or, the temperature control layer is made of a powdery or granular permalloy material or precision alloy material. 
     
     
         9 . The gas cooking device according to  claim 2 , wherein a support plate is arranged above the burner. 
     
     
         10 . The gas cooking device according to  claim 9 , wherein the temperature control layer forms at least a part of the support plate. 
     
     
         11 . The gas cooking device according to  claim 2 , wherein the temperature control layer is made of a permalloy or precision alloy material. 
     
     
         12 . The gas cooking device according to  claim 11 , wherein a Curie point temperature of the permalloy or precision alloy material is between 30° C. and 500° C. 
     
     
         13 . The gas cooking device according to  claim 12 , wherein the Curie point temperature of the permalloy or precision alloy material is between 70° C. and 400° C. 
     
     
         14 . The gas cooking device according to  claim 11 , wherein the precision alloy material is a precision alloy 4J36, a precision alloy 4J32, a ferromanganese alloy 4J59, a constant elastic alloy 3J53, a constant elastic alloy 3J53Y, a constant elastic alloy 3J58, an elastic alloy 3J54, an elastic alloy 3J58, an elastic alloy 3J59, an elastic alloy 3J53, an elastic alloy 3J61, an elastic alloy 3J62, an elastic alloy Ni 44 MoTiAl, a precision alloy 4J36, a precision alloy 4J32 or an amorphous soft 
     
     
         15 . The gas cooking device according to  claim 11 , wherein a content of iron in the permalloy is 35% to 70%, and a content of nickel in the permalloy is 30% to 65%. 
     
     
         16 . The gas cooking device according to  claim 1 , wherein the electromagnetic generating device comprises an electromagnetic coil, a signal generating unit and a signal receiving unit, the electromagnetic coil is connected to the signal generating unit and the signal receiving unit respectively, the signal generating unit is connected to a control module, and the signal receiving unit is connected to a detection analysis module. 
     
     
         17 . The gas cooking device according to  claim 16 , wherein a signal sent by the signal generating unit is a parameter of a pulse number, a pulse width, a pulse amplitude, a voltage, a current or a resistance. 
     
     
         18 . A method for controlling a flame size of the gas cooking device according to  claim 2 , comprising the following steps of:
 1) providing the gas cooking device according to  claim 1 ;   2) setting a corresponding relationship between a temperature value of the cooking device and an electric parameter value of the electromagnetic generating device; and   3) detecting and acquiring a detection value of the electric parameter of the electromagnetic generating device, and then controlling the temperature value of the cooking device within an expected range by adjusting the gas flow through the control valve according to the detection value of the electric parameter or the temperature value corresponding to the detection value.   
     
     
         19 . The method for controlling a flame size of the gas cooking device according to  claim 18 , wherein the electric parameter in the step 1) is a parameter of a pulse signal, a voltage, a current or a resistance. 
     
     
         20 . The method for controlling a flame size of the gas cooking device according to  claim 18 , wherein the step 2) further comprises setting an expected value of the electric parameter or a temperature value corresponding to the expected value, and in the step 3), the detection value of the electric parameter of the electromagnetic generating device is acquired, and is compared with an expected set value; and when the detection value of the electric parameter of the electromagnetic generating device is greater than or less than the set value, or when the temperature value corresponding to the detection value of the electric parameter is greater than or less than the temperature value of the set value, the detection value of the electric parameter is controlled to be within the expected range by adjusting the gas flow through the control valve. 
     
     
         21 . The method for controlling a flame size of the gas cooking device according to  claim 20 , wherein in the step 3), the detection value of the electric parameter of the electromagnetic generating device is acquired through the detection analysis module of the control unit, and compared with the set value in the step 2), and an analysis result is fed back to the control module; and the control module adjusts the control valve according to the analysis result, so that the detection value in the electromagnetic generating device is equal to or close to the set value. 
     
     
         22 . The method for controlling a flame size of the gas cooking device according to  claim 21 , wherein the set value in the step 2) comprises a set lowest value and a set highest value for the electric parameter of the electromagnetic generating device, and in the step 3), when the detection value of the electric parameter of the electromagnetic generating device is greater than the set highest value or less than the set lowest value, the control valve is adjusted to decrease or increase the detection value of the electric parameter until the detection value of the electric parameter is between the set highest value and the set lowest value.