CN110715325A - Gas stove and method for controlling firepower - Google Patents

Abstract

The invention relates to a gas stove which comprises a stove head, an air inlet pipe and a control valve used for controlling gas flow, wherein the gas stove is also provided with an electromagnetic generating device capable of generating electromagnetic signals and a control unit capable of controlling the size of the control valve according to the electromagnetic signals, and the control valve and the electromagnetic generating device are respectively and electrically connected with the control unit. The invention can conveniently realize the control of the firepower of the gas stove through the control valve, the control unit and the electromagnetic generating device.

Description

A kind of gas stove and method for controlling firepower size

technical field

The invention relates to the technical field of kitchen utensils, and more particularly, to a gas stove, and also to a method for controlling the firepower of the gas stove.

Background technique

Existing gas stoves, such as gas stoves, as long as the gas is continuously supplied, the temperature of the pot heated by it will continue to rise, and it is difficult to control the heated temperature within a reasonable range, and the gas stove can only be adjusted manually. The size of the valve is used to adjust the fire power, but this adjustment method has a certain hysteresis, that is to say, when the user realizes that the fire power is too high, the food has been overheated to a certain extent, resulting in the loss of nutrients and even coking of the food. Moreover, in the whole cooking process, the user needs to constantly adjust the size of the gas valve according to the needs of the cooking stage, and the operation is frequent, which causes many inconveniences in use.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a gas stove that can easily realize temperature control.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

A gas stove, comprising a burner head, an air inlet pipe and a control valve for controlling gas flow, characterized in that the gas stove is further provided with an electromagnetic generating device capable of generating electromagnetic signals and a control unit capable of controlling the size of the control valve, The control valve and the electromagnetic generating device are respectively connected with the control unit, a temperature sensing layer capable of inducing the electromagnetic signal generated by the electromagnetic generating device is arranged above or on the side of the electromagnetic generating device, and the temperature sensing layer is formed with the electromagnetic heating coil. Coupling impedance, the temperature sensing layer has an initial critical value of temperature change and an ending critical value of temperature change, and the temperature sensing layer is within the temperature interval defined by the initial critical value of temperature change and the critical value of ending temperature change, under the action of the electromagnetic signal It has the following relationship with the coupling impedance:

K=|(R2-R1)/[R1×(T2-T1)]|

Among them, R1 represents the coupling impedance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T1;

R2 represents the coupling impedance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T2;

T2-T1=1;

K is the absolute value of (R2-R1)/[R1×(T2-T1)], and not less than 0.05;

The R1 and R2 are the coupling impedance values at both ends of the electromagnetic heating coil, which are assumed to be measured by the bridge under certain conditions. The magnetic rod is made by winding 300 turns of copper wire with a diameter of 0.2 mm, and the distance between the electromagnetic heating coil and the temperature sensing layer is set to be 5 mm, and the power is 25 kHz. In this technical solution, the connection between the control unit and the electric heating device and the electromagnetic generating device is usually preferably an electrical connection, but a wireless signal connection can also be used for signal transmission. In addition, the connection in this technical solution is not only It can be a direct connection or an indirect connection, that is, the control unit and the heating device or the electromagnetic generating device can be connected through some electrical components.

In this patent, an electromagnetic generating device is creatively arranged on the gas stove, so that it has the function of transmitting electromagnetic signals, and then, under the control of the control unit, the temperature is controlled by cooperating with a control valve and a device capable of sensing the electromagnetic signal.

A temperature sensing layer capable of inducing electromagnetic signals generated by the electromagnetic generating device is provided above or on the side of the electromagnetic generating device. The temperature-sensing layer and the electromagnetic generating device cooperate with each other to control the temperature. The temperature-sensing layer can be fixedly connected with the gas stove to make it a part of the gas stove, or the temperature-sensing layer can be processed separately and can be dismantled. The gas stove is assembled on the gas stove in such a way that it becomes a relatively independent part. When in use, the temperature-sensing layer can be placed above the electromagnetic generating device at any time, and the temperature-sensing layer can be removed at any time after use. It is even possible to attach the temperature-sensing layer to the cooking utensils that can be used with the gas stove, but no matter what the combination is, as long as the temperature-sensing layer can sense the electromagnetic signal generated by the electromagnetic generating device, it has the basics of controlling the temperature. condition.

Preferably, this patent improves the intake pipe and the control valve in order to facilitate the control of the gas flow. For example, the number of the intake pipes is preferably 2 to 6, and each intake pipe is provided with a control valve; by controlling different The total gas flow is controlled by the flow rate of the intake pipe or by closing part of the intake pipe, or the intake pipe is composed of 2 to 6 sub-gas pipes, and each sub-gas pipe is provided with a control valve. Control of total gas flow.

Preferably, the control unit includes a detection and analysis module and a control module,

The detection and analysis module is connected with the electromagnetic generating device to detect the change of the electrical parameters in the electromagnetic generating device, compare the detected value with the initial setting value, and feed back the analysis result to the control module. The electrical parameters here are preferably is a pulse signal, voltage, current or resistance parameter, where the pulse signal is the number of pulses, pulse width or pulse amplitude, etc.;

The input end of the control module is connected to the detection and analysis module, and the output end is connected to the control valve. The control module adjusts the gas flow through the control valve according to the analysis result to keep the temperature of the temperature sensing layer within a preset interval. Specifically, the detected value is compared with the initially set minimum and maximum values. When the detected value exceeds the minimum or maximum value, the control module of the control unit will reduce the detected value of the electrical parameter by adjusting the size of the control valve. Or increase until the detected value of the electrical parameter is between the set maximum and minimum values; when the detected value of the electrical parameter in the electromagnetic generating device is between the set maximum and minimum values, the control valve can keep the original gas flow rate. Air volume. Detection analysis and control are the two basic functions of the control unit, and other functional modules, such as data conversion modules, can also be added on this basis. The control unit controls the temperature by detecting the change of the electrical parameters in the electromagnetic generating device. Compared with the traditional temperature sensor, this patent can reflect the temperature of the temperature sensing layer in time and avoid the temperature detection hysteresis caused by the temperature sensor.

Preferably, a cooking utensil is arranged above the stove head, and a temperature-sensing layer capable of inducing an electromagnetic signal generated by an electromagnetic generating device is arranged on the cooking utensil. As mentioned above, the temperature sensing layer is not necessarily attached to the gas stove, but can be installed on cooking utensils, such as pots. When the cooking utensil is used in conjunction with the gas stove, the temperature sensing layer can also interact with the electromagnetic generating device. , This preferred solution changes the installation method of the temperature sensing layer, making the application of the temperature sensing layer more flexible.

Preferably, the temperature-sensing layer constitutes at least a part of the cooking utensil, that is, the temperature-sensing layer can either constitute the bottom of the cookware alone, or can be combined with the bottom of the cookware to become a part of the bottom of the cookware. Of course, for three-dimensional heating, the temperature sensing layer can also be arranged on the body of the pot.

As another preferred embodiment, a support plate is provided above the burner head. In existing gas stoves, a burner is only set on the burner head, and then the cooking utensils are placed on the burner frame. In this preferred solution, an additional setting is provided above the burner head A support plate is provided, which can be arranged on the hob. When cooking, the cooking utensils are arranged on the supporting plate, which can not only support the cooking utensils stably, but also make the cooking utensils heat evenly.

Preferably, the temperature-sensing layer forms at least a part of the support plate, that is, the temperature-sensing layer can form the support plate alone, or can be combined on the support plate to form a part of the support plate.

The electromagnetic generating device includes an electromagnetic coil, a signal generating unit, and a signal receiving unit. The electromagnetic coil is respectively connected with the signal generating unit and the signal receiving unit, the signal generating unit is connected with the control module, and the signal receiving unit is connected with the detection and analysis unit. The modules are connected, and the connection is preferably an electrical connection.

Preferably, the signal sent by the signal generating unit is the number of pulses, the pulse width or the pulse amplitude. The signal generating unit sends a signal to the electromagnetic coil, and the electromagnetic coil generates an electromagnetic signal after receiving the signal.

This patent also provides a method for controlling the firepower of a gas stove, comprising the following steps:

1) Provide the above-mentioned gas stove;

2) Set the corresponding relationship between the temperature value of the cooking device and the electrical parameter value of the electromagnetic generating device, such as a pulse signal, voltage, current or resistance parameter, wherein the pulse signal is the number of pulses, the pulse width or pulse amplitude, etc., because these electrical parameters can form a specific correspondence with the temperature value of the temperature sensing layer;

3) Detect and obtain the detected value of the electrical parameter in the electromagnetic generating device, and then adjust the gas flow through the control valve according to the detected value of the electrical parameter or the temperature value corresponding to the detected value, so that the temperature value of the cooking device is controlled within the expected range .

Preferably, step 2) further includes setting the expected value of the electrical parameter or the temperature value corresponding to the expected value, step 3) obtaining the detected value of the electrical parameter in the electromagnetic generating device, and comparing the detected value with the expected set value, When the detected value of the electrical parameter of the electromagnetic generating device is greater than or less than the set value, or when the temperature value corresponding to the detected value of the electrical parameter is greater than or less than the set value, the gas flow is adjusted by the control valve to make the electrical parameter The detected value is controlled within the expected range.

Preferably, in step 3), the detection value of the electrical parameters in the electromagnetic generating device is obtained by the detection and analysis module of the control unit, the detection value is compared with the set value in step 2), and the analysis result is fed back to the control module; the control The module adjusts the control valve according to the analysis result so that the detected value in the electromagnetic generating device is equal to or close to the set value.

Further, the set value in step 2) includes the minimum value and the maximum value of the electrical parameter of the electromagnetic generating device, and in step 3), when the detected value of the electrical parameter of the electromagnetic generating device is greater than the set maximum value or less than the minimum value , adjust the control valve to decrease or increase the detected value of the electrical parameter until the detected value of the electrical parameter is between the set maximum and minimum values.

Compared with the prior art, the beneficial effects of the present invention are:

The invention adds an electromagnetic generating device to the traditional gas stove, and then adjusts the size of the control valve according to the change of the electrical parameters in the electromagnetic generating device to realize the regulation of the temperature. The electrical parameter can form a corresponding relationship with the temperature of the temperature sensing layer. Therefore, as long as the electrical parameter is controlled within a certain range, the temperature of the temperature sensing layer can be maintained within a certain range, thereby realizing temperature control.

Because the control method is realized by the change of the electrical parameters in the electromagnetic generating device, and the change of the electrical parameters can form a corresponding relationship with the temperature of the temperature sensing layer, the control unit can quickly detect the change of the electrical parameters and adjust the control valve in time, which overcomes the problem of Hysteresis of temperature regulation.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of an electromagnetic generating device;

3 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 4 is the principle diagram of the temperature control method of the present invention;

Figure 5 and Figure 6 are graphs showing the relationship between the number of pulses and temperature.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. Among them, the accompanying drawings are only used for exemplary description, and they are only schematic diagrams, not physical drawings, and should not be construed as restrictions on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, with a specific orientation. Orientation structure and operation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on the present patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

Example 1

As shown in FIG. 1 , the present invention relates to a gas stove, such as a gas stove, etc., the gas stove includes a gas stove 2 and a cooking appliance 1 placed above the gas stove 2, the cooking appliance is preferably a pot 1, and the gas stove The stove 2 includes a stove head 21, a stove rack 22, a panel 23, an air intake pipe 25 and a control valve 24. The panel 23 is provided with a mounting hole, the stove head 21 is arranged in the installation hole, and the stove rack 22 is arranged on the panel 23. 22 and the furnace head 21 are arranged in concentric circles, that is, the furnace frame 22 is arranged on the periphery of the furnace head 21 to support the object to be heated. The air inlet pipe 25 communicates with the burner head 21 to provide a pipeline for gas supply. The air inlet pipe 25 is provided with a control valve 24, which can be a solenoid valve or other valve with the function of adjusting the gas flow. The gas stove also includes an electromagnetic generating device 27 and a control unit 26 arranged below the cookware 1. The electromagnetic generating device 27 and the control valve 24 are both electrically connected to the control unit 26, and all three are connected to a power source, and the electromagnetic generating device 27 and the control valve 24 are electrically connected to the control unit 26. The device 27 is preferably fixed above or below the furnace head 21, and the electromagnetic generating device 27 is mainly composed of an electromagnetic coil, a signal generating unit 271, and a signal receiving unit 272, and the electromagnetic coil is respectively connected with the signal generating unit 271 and the signal receiving unit 272. electrical connection. The electromagnetic generating device is used to generate an electromagnetic field. The size and number of turns of the electromagnetic coil can be freely set according to actual needs. The electromagnetic generating device is connected to the control unit 26 , which is preferably fixed under the panel 23 .

As a preferred embodiment, the number of the air intake pipes 25 is preferably 2 to 6, and each air intake pipe 25 is provided with a control valve 24; The gas flow, or the intake pipe 25 is composed of 2 to 6 sub gas pipes, each sub gas pipe is provided with a control valve 24, and the total gas flow can also be controlled by controlling the flow of each sub gas pipe.

As another preferred embodiment, the cookware 1 is provided with a temperature sensing layer 11 capable of inducing electromagnetic signals generated by the electromagnetic generating device 27 . The temperature sensing layer 11 can be made into the whole cookware or as a part of the cookware, and can be combined with the cookware main body by riveting, welding, spraying, printing and other methods. When the temperature sensing layer 11 is arranged at the bottom of the cookware 1, it can either form the bottom of the cookware 1 alone, or can be combined at the bottom of the cookware 1 to become a part of the bottom of the cookware 1. In terms of its composite position, the temperature sensing layer 11 can be located either on the upper surface of the bottom of the cookware 1 or on the lower surface of the bottom of the cookware 1 . The bottom of the pot, that is, the bottom portion of the pot can be either a single-layer design or a composite design, for example, the pot bottom is formed by compounding one or more of aluminum plates, steel plates, copper plates or iron plates. When the bottom of the pot 1 is of a composite design, the temperature sensing layer 11 can also be provided between the upper surface and the lower surface of the pot bottom. Of course, for three-dimensional heating, the temperature sensing layer can also be arranged on the body of the pot.

The temperature sensing layer and the electromagnetic heating coil interact with each other under the action of electromagnetic signals to form a coupling impedance. There is a certain correspondence between the coupling impedance and the temperature of the temperature sensing layer. As shown in Figures 2 and 4, the coupling impedance and temperature sensing The specific temperature curve relationship formed between the layer temperatures, the temperature curve has two inflection points, namely the first temperature inflection point and the second temperature inflection point, the value of the first temperature inflection point is less than the value of the second temperature inflection point, at the first temperature inflection point The curve before the inflection point and the curve after the second temperature inflection point tend to be horizontal straight lines, that is, before the first temperature inflection point, the coupling impedance hardly changes, or does not change significantly. Similarly, after the second temperature inflection point , the coupling impedance hardly changes, or does not change significantly, but between the first temperature inflection point and the second temperature inflection point, the temperature curve shows a relatively obvious linear relationship, that is, the temperature of the temperature sensing layer changes with The coupling impedance changes with the difference, so that a one-to-one correspondence is formed between the temperature value of the temperature sensing layer and the coupling impedance value. This linear relationship varies with the material of the temperature sensing layer. The temperature value of the warm layer and the coupling impedance value may be in a proportional relationship or in an inverse proportional relationship. The temperature interval between the first temperature inflection point and the second temperature inflection point is an effective temperature interval for temperature control. In the effective temperature interval, as long as the coupling impedance value formed by the temperature sensing layer and the electromagnetic heating coil is known, it can be obtained. The temperature value of the corresponding temperature sensing layer is obtained. Therefore, the first temperature inflection point is also referred to as the initial critical value of temperature change, and the second temperature inflection point is also referred to as the end critical value of temperature change.

The temperature-sensing layer used in this patent has the above characteristics, that is, in the curve relationship between the coupling impedance value of the temperature-sensing layer and the electromagnetic heating coil and the temperature value of the temperature-sensing layer, at least in a certain temperature range, at the temperature of the temperature-sensing layer The following relationship exists for a change of 1°C:

K=|(R2-R1)/[R1×(T2-T1)]|

Among them, R1 represents the coupling impedance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T1;

R2 represents the coupling impedance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T2;

T2-T1=1;

K is the absolute value of (R2-R1)/[R1×(T2-T1)], and not less than 0.05;

The R1 and R2 are assumed to be the coupling impedance values at both ends of the electromagnetic heating coil measured by the bridge under specific conditions. The patent defines the specific condition as an assumed detection condition, that is, the electromagnetic heating coil is made of a diameter of 10mm. , the TDK PC40 magnetic rod with a length of 10mm is made by winding 300 turns of copper wire with a diameter of 0.2mm, and the distance between the electromagnetic heating coil and the temperature sensing layer is set to 5mm, and the power is 25kHz. The coupling impedance value at both ends of the electromagnetic heating coil. The reason why this patent locates the specific conditions of this detection is to provide a criterion for determining the curve relationship between the coupling impedance and the temperature of the temperature sensing layer, and to better describe the special properties of the temperature sensing layer , but this definition should not be regarded as a limitation on this patent. It can be easily imagined that when the specific conditions of detection defined in this patent are changed, the coefficient K in the above relationship will change, but this special temperature sensing layer. The temperature characteristics of , do not change qualitatively with the definition.

The control unit 26 includes a detection and analysis module 261 and a control module 262. The detection and analysis module 261 is connected to the electromagnetic generating device 27. Specifically, as shown in FIG. 2, the detection and analysis module 261 receives signals from the electromagnetic generating device 27. The unit is connected, and the detection and analysis module 261 is used for real-time detection of changes in electrical parameters in the electromagnetic generating device. This electrical parameter can be a pulse signal, voltage, current or resistance parameter, wherein the pulse signal is preferably the number of pulses, pulse width or pulse amplitude, etc. Taking the number of pulses as an example, the input end of the control module is connected to the detection and analysis module , the output end is connected to the control valve. After the detection and analysis module detects the number of pulses in the electromagnetic generating device, it is compared and judged whether it exceeds the initial set minimum or maximum value. When it exceeds the range, the control module will adjust the control valve, that is, control the gas The temperature of the temperature sensing layer 11 is adjusted according to the size of the gas stove, and finally the firepower of the gas stove is adjusted, so as to adjust the temperature of the temperature sensing layer 11; In addition, the control module is also connected with the signal generating unit in the electromagnetic generating device.

This patent also provides a method for controlling the firepower of a gas stove, comprising the following steps:

1) Provide the above-mentioned gas stove;

2) The corresponding relationship between the temperature value of the cooking device and the electrical parameter value of the electromagnetic generating device is set in the control module, especially the corresponding relationship between the temperature value of the temperature sensing layer of the cooking device and the electromagnetic generating device. This is because The unique physical properties of the temperature-sensing layer enable a specific correspondence between the temperature of the temperature-sensing layer and the electrical parameters of the electromagnetic generating device to be formed, and the present invention utilizes this correspondence to control the temperature. The electrical parameter is such as pulse signal, voltage, current or resistance, wherein the pulse signal is preferably the number of pulses, pulse width or pulse amplitude, etc. The number of pulses is taken as an example, as shown in FIGS. 5 and 6 .

3) Detect and obtain the detected value of the electrical parameter in the electromagnetic generating device, and then adjust the gas flow through the control valve according to the detected value of the electrical parameter or the temperature value corresponding to the detected value, so that the temperature value of the cooking device is controlled within the expected range .

Since the change of the electrical parameters in the electromagnetic generating device reflects the temperature change of the temperature sensing layer 11, there is a specific corresponding relationship between the two. Therefore, the corresponding temperature value can be determined by the electrical parameter value in the electromagnetic generating device, Then the precise control of the temperature of the temperature sensing layer can be achieved by controlling the control valve.

Preferably, step 2) further includes setting the expected value of the electrical parameter or the temperature value corresponding to the expected value, step 3) obtaining the detected value of the electrical parameter in the electromagnetic generating device, and comparing the detected value with the expected set value, When the detected value of the electrical parameter of the electromagnetic generating device is greater than or less than the set value, or when the temperature value corresponding to the detected value of the electrical parameter is greater than or less than the set value, the gas flow is adjusted by the control valve to make the electrical parameter The detected value is controlled within the expected range.

The set value of the electrical parameter may be a value, or a threshold value composed of two values, such as the minimum value and the maximum value of the set electrical parameter, the minimum value and the maximum value respectively correspond to the temperature of the temperature sensing layer. an initial set value. When the set value is a threshold value, the detected value of the electrical parameter in the electromagnetic generating device is compared with the set value. When the detected value exceeds the minimum value or the maximum value, the control module of the control unit will realize the realization by adjusting the control valve. Control the amount of gas intake air, and then realize the adjustment of the temperature of the temperature sensing layer, so that the detected value of the electrical parameter is decreased or increased until the detected value of the electrical parameter is between the set maximum and minimum values. When the detected value of the electrical parameters in the electromagnetic generating device is between the set maximum and minimum values, the control valve can maintain the original gas intake volume.

Specifically in terms of pulse parameters, as shown in Figure 4, after the gas stove works, the pulse generating unit in the electromagnetic generating device generates a signal and transmits it to the electromagnetic coil. The signal can be the number of pulses, pulse width, pulse amplitude, voltage, current or resistance parameters and other identifiable signals, the signal is received by the electromagnetic coil of the electromagnetic generating device and converted into an electromagnetic signal. At the same time, the control valve is opened, and the furnace head starts to burn and heat the temperature sensing layer after ventilation. The electromagnetic signal acts on the temperature-sensing layer and is attenuated by the loss of the temperature-sensing layer. The electrical parameters of the electromagnetic generating device change with the temperature of the temperature-sensing layer, and form a specific corresponding relationship. The electrical parameters of the pulse number, pulse width, pulse amplitude, voltage, Current or resistance parameters, such as the linear relationship between the number of pulses and the temperature of the temperature sensing layer. The signal receiving unit in the electromagnetic generating device receives the electrical parameter, and the detection and analysis module of the control unit detects whether the electrical parameter exceeds the initial set value, and transmits the analysis result to the control module of the control unit. The temperature of the temperature sensing layer is kept within the preset range by adjusting the gas flow through the control valve, that is, when the detected electrical parameter is greater than or less than the set value, the control module will control the size of the control valve to make the detected value of the electrical parameter Decrease or increase until the detected value of the electrical parameter is equal to or close to the set value. The so-called proximity here refers to the acceptable difference within a certain range, for example, the current value is within 0-0.5A, the voltage value is within 50V, the resistance value is within 5Ω, and the pulse signal is within 3. kind of close.

In addition to the electrical parameters, the objects used for comparison can also convert the electrical parameter values into corresponding temperature values for comparison.

Example 2

As shown in FIG. 3, this embodiment improves the temperature sensing layer 11 on the basis of Embodiment 1. In this embodiment, the temperature sensing layer 11 is not provided on the cookware 1, but exists independently of the cookware. Specifically, a support plate is provided above the furnace frame 22, and the support plate is placed on the furnace frame 22. As another preferred embodiment, the support plate can also be integrated or fixed with the furnace frame 22. connect.

In addition, the temperature sensing layer can also be arranged on the side of the electromagnetic generating device, as long as the temperature sensing layer can sense the electromagnetic signal generated by the electromagnetic generating device, the purpose of temperature control can be achieved.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (12)

1. The utility model provides a gas stove, includes furnace end, intake pipe and is used for controlling the control valve of gas flow, its characterized in that, the gas stove still is equipped with the electromagnetic generating device that can produce electromagnetic signal and can controls the control unit of control valve size, control valve, electromagnetic generating device are connected with the control unit respectively, electromagnetic generating device top or side are equipped with the temperature sensing layer that can respond to the electromagnetic signal that electromagnetic generating device produced, temperature sensing layer and electromagnetic heating coil form coupling impedance, and the temperature sensing layer has initial critical value of temperature change and the end critical value of temperature change, and the temperature sensing layer in the temperature interval that initial critical value of temperature change and the end critical value of temperature change were injectd, there is following relation with coupling impedance under electromagnetic signal's effect:

K＝|(R2-R1)/[R1×(T2-T1)]|

wherein, R1 represents the coupling impedance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T1;

r2 represents the coupling resistance value generated by the temperature sensing layer and the electromagnetic heating coil when the temperature of the temperature sensing layer is T2;

T2-T1＝1；

k is an absolute value of (R2-R1)/[ R1 × (T2-T1) ] and is not less than 0.05;

the R1 and R2 are coupling impedance values of two ends of the electromagnetic heating coil which are measured by an electric bridge under specific conditions, the specific conditions are defined in the patent, the electromagnetic heating coil is made by winding 300 turns of a 10 mm-diameter 10 mm-length TDK PC40 magnetic rod by a 0.2 mm-diameter copper wire, the distance between the electromagnetic heating coil and the temperature sensing layer is 5mm, and the power is 25 kHz.

2. The gas stove of claim 1, wherein the number of the gas inlet pipes is 2 to 6, and each gas inlet pipe is provided with a control valve; or,

the air inlet pipe is composed of 2-6 sub-air pipes, and each sub-air pipe is provided with a control valve.

3. The gas range of claim 1, wherein the control unit comprises a detection analysis module and a control module,

the detection and analysis module is connected with the electromagnetic generating device and used for detecting the change of electrical parameters in the electromagnetic generating device, comparing a detection value with an initial set value and feeding back an analysis result to the control module;

the input end of the control module is connected with the detection and analysis module, the output end of the control module is connected with the control valve, and the control module adjusts the gas flow according to the analysis result and through the control valve to enable the temperature of the temperature sensing layer to be kept within a preset interval.

4. The gas range of claim 1, wherein a cooking utensil is provided above the burner, and a temperature sensing layer capable of sensing an electromagnetic signal generated by the electromagnetic generating device is provided on the cooking utensil, wherein the temperature sensing layer constitutes at least a part of the cooking utensil.

5. The gas stove of any one of claims 1 to 4, wherein a support plate is provided above the burner, and the temperature sensing layer constitutes at least a part of the support plate.

6. The gas stove of claim 1, wherein the electromagnetic generating device comprises an electromagnetic coil, a signal generating unit and a signal receiving unit, the electromagnetic coil is respectively connected with the signal generating unit and the signal receiving unit, the signal generating unit is connected with the control module, and the signal receiving unit is connected with the detection and analysis module.

7. The gas stove of claim 6, wherein the signal generated by the signal generating unit is a pulse number, a pulse width, a pulse amplitude, a voltage, a current or a resistance parameter.

8. A method for controlling the fire power of the gas range of claims 1 to 7, comprising the steps of:

1) providing a gas burner according to any one of claims 1 to 7;

2) setting a corresponding relation between the temperature value of the cooking device and the electric parameter value of the electromagnetic generating device;

3) detecting and obtaining a detection value of an electric parameter in the electromagnetic generating device, and then adjusting the gas flow through a control valve according to the detection value of the electric parameter or a temperature value corresponding to the detection value to control the temperature value of the cooking device within an expected range.

9. The method for controlling the fire power of a gas stove according to claim 8, wherein the electrical parameter in step 1) is a pulse signal, a voltage, a current or a resistance parameter.

10. The method for controlling the fire of the gas stove according to claim 8, wherein the step 2) further comprises setting an expected value of the electrical parameter or a temperature value corresponding to the expected value, and the step 3) obtains a detected value of the electrical parameter in the electromagnetic generating device, compares the detected value with the expected set value, and controls the gas flow rate to be controlled within an expected range by controlling the valve when the detected value of the electrical parameter of the electromagnetic generating device is greater than or less than the set value or the temperature value corresponding to the detected value of the electrical parameter is greater than or less than the set value.

11. The method for controlling the fire of the gas stove according to claim 10, wherein the detection value of the electrical parameter in the electromagnetic generating device is obtained by a detection and analysis module of the control unit in the step 3), the detection value is compared with the set value in the step 2), and the analysis result is fed back to the control module; and the control module adjusts the control valve according to the analysis result to enable the detection value in the electromagnetic generating device to be equal to or close to the set value.

12. The method for controlling the fire of a gas stove according to claim 11, wherein the setting values in step 2) include setting a lowest value and a highest value of an electrical parameter of the electromagnetic generating device, and in step 3), when the detected value of the electrical 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 lower or raise the detected value of the electrical parameter until the detected value of the electrical parameter is between the set highest and lowest values.

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