WO2018006874A1 - 一种燃气烹饪装置及控制火力大小的方法 - Google Patents

一种燃气烹饪装置及控制火力大小的方法 Download PDF

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Publication number
WO2018006874A1
WO2018006874A1 PCT/CN2017/092262 CN2017092262W WO2018006874A1 WO 2018006874 A1 WO2018006874 A1 WO 2018006874A1 CN 2017092262 W CN2017092262 W CN 2017092262W WO 2018006874 A1 WO2018006874 A1 WO 2018006874A1
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Prior art keywords
value
electromagnetic
temperature
gas cooking
electrical parameter
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PCT/CN2017/092262
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English (en)
French (fr)
Inventor
廖哲
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肇庆市天宇进出口贸易有限公司
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Priority to US16/476,114 priority Critical patent/US20190368743A1/en
Priority to RU2019119949A priority patent/RU2730226C1/ru
Publication of WO2018006874A1 publication Critical patent/WO2018006874A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/122—Arrangement or mounting of control or safety devices on stoves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J33/00—Camp cooking devices without integral heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/124—Control panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/02—Stoves or ranges for gaseous fuels with heat produced solely by flame

Definitions

  • the invention relates to the technical field of kitchen utensils, and more particularly to a gas cooking device, and to a method for controlling the firepower of a gas cooking device.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a gas cooking device capable of conveniently implementing temperature control.
  • the technical solution adopted by the present invention is:
  • a gas cooking device comprising a burner, an intake pipe and a control valve for controlling a gas flow, the gas cooking device further provided with an electromagnetic generating device capable of generating an electromagnetic signal and a control unit capable of controlling a size of the control valve,
  • the control valve and the electromagnetic generating device are respectively connected to the control unit.
  • the connection between the control unit and the electric heating device and the electromagnetic generating device is generally preferably an electrical connection, but the signal transmission may also be performed by using a wireless signal connection or the like, and in addition, the connection in the technical solution is It can be a direct connection or an indirect connection, that is, the control unit can be connected to the heating device or the electromagnetic generating device through some electrical components.
  • This patent creatively provides an electromagnetic generating device on a gas cooking device that has the function of transmitting an electromagnetic signal, and then controls the temperature by a control valve and a device capable of sensing the electromagnetic signal under the control of the control unit.
  • the electromagnetic generating device is provided above or to the side to be capable of inducing an electromagnetic generating device
  • the temperature control layer of the generated electromagnetic signal cooperates with the electromagnetic generating device to control the temperature, and the temperature control layer can be fixedly connected with the gas cooking device to make it a part of the gas cooking device, and the temperature control layer can be separately processed and It is detachably assembled on the gas cooking device to make it a relatively independent component.
  • the temperature control layer can be placed above the electromagnetic generating device at any time. After use, the temperature control layer can be removed at any time. It is even possible to attach the temperature control layer to the cooking appliance that can be used with the gas cooking device, but in any combination, as long as the temperature control layer can sense the electromagnetic signal generated by the electromagnetic generating device, the temperature is controlled. Basic conditions.
  • a temperature control layer capable of inducing an electromagnetic field is provided above the hob, and the temperature control layer has ferromagnetism or ferrimagnetism.
  • the temperature control layer is adjusted by the interaction of the temperature control layer and the electromagnetic generating device, as well as the control unit and the control valve.
  • the temperature control layer has a magnetic permeability of 2,000 to 200,000 H/m, and the temperature control layer has a specific resistance of 30 to 130 ⁇ cm.
  • the patent improves the intake pipe and the control valve.
  • the number of the intake pipes is preferably 2 to 6, and each intake pipe is provided with a control valve;
  • the intake pipe flow rate or close part of the intake pipe to control the total gas flow, or the intake pipe is composed of 2 to 6 sub-pipes, and each sub-pipe has a control valve, which can also be realized by controlling the flow of each sub-pipe Total gas flow control.
  • control unit comprises a detection analysis module and a control module
  • the detection and analysis module is connected to the electromagnetic generation device for detecting the change of the electrical parameter in the electromagnetic generation device, and comparing the detected value with the initial set value, and feeding back the analysis result to the control module, where the electrical parameter is optimized a pulse signal, a voltage, a current, or a resistance parameter, wherein the pulse signal is a pulse number, a pulse width, or a pulse amplitude;
  • 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 rate according to the analysis result and controls the temperature of the temperature control layer to be within a preset interval. Specifically, the detected value is compared with the initially set minimum and maximum values, and when the detected value exceeds the lowest value or the highest value, the control module of the control unit reduces the detected value of the electrical parameter by adjusting the size of the control valve. Or raise 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 maintain the original gas intake air amount. Detection analysis and control are the two basic functions of the control unit.
  • the control unit realizes the temperature control by detecting the change of the electrical parameters in the electromagnetic generating device. Compared with the conventional temperature sensor, the patent can timely reflect the temperature of the temperature control layer and avoid the temperature detection hysteresis brought by the temperature sensor.
  • a cooking appliance is arranged above the burner, and the cooking appliance is provided with a temperature control layer capable of sensing an electromagnetic signal generated by the electromagnetic generating device.
  • the temperature control layer does not necessarily adhere to the gas cooking device, and can be mounted on a cooking appliance, such as a cooking utensil, and can also make the temperature control layer and the electromagnetic generating device when the cooking appliance is used together with the gas cooking device. Interaction, this preferred solution changes the installation mode of the temperature control layer, making the application of the temperature control layer more flexible.
  • the temperature control layer constitutes at least a part of the cooking appliance, that is, the temperature control layer may be separately formed into the bottom of the pot or may be compounded on the bottom of the pot to become a part of the bottom of the pot.
  • the temperature control layer may also be disposed at the body portion.
  • the temperature control layer is in the form of a sheet, such as a metal foil, or the temperature control layer is composed of a powdery or granular permalloy material or a precision alloy material and is attached to the bottom of the pot.
  • the so-called permalloy materials are also known as iron-nickel alloy materials.
  • a support plate is arranged above the burner head, and the existing gas cooking device only places a hob on the burner head, and then places the cooking utensil on the hob.
  • the preferred solution is above the burner head.
  • a support plate is added, and the support plate can be disposed on the hob.
  • the cooking utensil is disposed on the support plate.
  • the support plate can evenly heat the cooking utensil.
  • the temperature control layer constitutes at least a part of the support plate, that is, the temperature control layer may be separately composed of the support plate or may be composited on the support plate to form a part of the support plate.
  • the temperature control layer is made of a permalloy material or a precision alloy material.
  • the Permalloy material or the precision alloy material has a Curie point temperature of between 30 degrees Celsius and 500 degrees Celsius. Preferably between 70 degrees Celsius and 400 degrees Celsius, The step is preferably between 180 degrees Celsius and 350 degrees Celsius.
  • the temperature of the temperature control layer reaches the Curie point of the temperature control layer, the magnetic permeability of the temperature control layer will suddenly decrease to near zero, and its temperature will stop rising.
  • the precision alloy material is a material having a Curie point temperature between 180 degrees Celsius and 230 degrees Celsius.
  • precision alloy 4J36 manufactured by Shanghai Kaiye Metal Products Co., Ltd.
  • precision alloy 4J32 manufactured by Shanghai Kaiye Metal Products Co., Ltd.
  • Precision Alloy 4J36 is a special low expansion iron-nickel alloy with ultra-low expansion coefficient, its Curie point is 230 degrees Celsius
  • precision alloy 4J32 alloy also known as Super-Invar alloy, has a Curie point temperature of 220 degrees Celsius.
  • the precision alloy materials that can be applied to this patent are preferably the following alloy materials listed in the standard numbers GB/T15018-94, YB/T5239-2005, YB/T5262-93, YB/T5254-2011, among which the standard No. GB/T15018-94 refers to the "National Standard Precision Alloy Grade of the People's Republic of China", and the standard number YB/T5254-2011 refers to the "Black Metallurgical Industry Standard of the People's Republic of China”.
  • the chemical composition of the elastic alloy 3J53 in the table includes:
  • the content of C element is not more than 0.05%
  • the content of the S element is not more than 0.020%
  • the content of P element is not more than 0.020%
  • the content of Mn element is not more than 0.80%;
  • the content of Si element is not more than 0.80%;
  • Ni element The content of Ni element is 41.5% to 43.0%;
  • the content of Cr element is 5.2% to 5.8%;
  • the content of Ti element is 2.3% to 2.7%;
  • the content of Al element is 0.5% to 0.8%;
  • the balance is Fe element.
  • the chemical composition of the elastic alloy 3J58 includes:
  • the content of C element is not more than 0.05%
  • the content of the S element is not more than 0.020%
  • the content of P element is not more than 0.020%
  • the content of Mn element is not more than 0.80%;
  • the content of Si element is not more than 0.80%;
  • Ni element The content of Ni element is 43.0% to 43.6%;
  • the content of Cr element is 5.2% to 5.6%
  • the content of Ti element is 2.3% to 2.7%;
  • the content of Al element is 0.5% to 0.8%;
  • the balance is Fe element.
  • the chemical composition of precision alloy 4J32 includes:
  • the content of C element is not more than 0.05%
  • the content of the S element is not more than 0.020%
  • the content of P element is not more than 0.020%
  • the content of the Mn element is 0.20% to 0.60%;
  • the content of Si element is not more than 0.20%;
  • Ni element is 31.5% to 33.0%;
  • the content of Co element is 3.2% to 4.2%;
  • the content of Cu element is 0.4% to 0.8%;
  • the balance is Fe element.
  • the chemical composition of precision alloy 4J36 includes:
  • the content of C element is not more than 0.05%
  • the content of the S element is not more than 0.020%
  • the content of P element is not more than 0.020%
  • the content of the Mn element is 0.20% to 0.60%;
  • the content of Si element is not more than 0.30%;
  • Ni element is 35.0% to 37.0%;
  • the balance is Fe element.
  • the above alloy materials can be supplied by Shanghai Kaiye Metal Products Co., Ltd. or through other public sales channels.
  • the content of iron in the permalloy is 35 to 70%, and the content of nickel is 30 to 65%.
  • the electromagnetic generating device comprises an electromagnetic coil, a signal generating unit and a signal receiving unit, wherein the electromagnetic coil is respectively connected with a signal generating unit and a signal receiving unit, the signal generating unit is connected with the control module, and the signal receiving unit and the detecting and analyzing The modules are connected, and the connections are preferably electrically connected.
  • the signal emitted by the signal generating unit is a pulse number, a pulse width or a 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.
  • the patent also provides a method for controlling the firepower of a gas cooking device, comprising the following steps:
  • step 2) further comprises setting an expected value of the electrical parameter or a temperature value corresponding to the expected value
  • step 3) acquiring a detected value of the electrical parameter in the electromagnetic generating device, and comparing the detected value with the expected set value,
  • the gas flow rate is adjusted by the control valve to make the electrical parameter The detected value is controlled within the expected range.
  • step 3 the detection value of the electrical parameter in the electromagnetic generating device is obtained by the detection and analysis module of the control unit, the detected value is compared with the set value of step 2), and the analysis result is fed back to the control module;
  • 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.
  • the set value in step 2) includes setting a minimum value and a highest value of the electrical parameters 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 a set maximum value or less than a minimum value
  • the control valve is adjusted, the detected value of the electrical parameter is lowered or increased until the detected value of the electrical parameter is between the set highest and lowest values.
  • the invention adds an electromagnetic generating device to the traditional gas cooking device, and then adjusts the temperature according to the change of the electric parameter in the electromagnetic generating device by adjusting the size of the control valve, and the controlled temperature layer is changed due to the change of the electrical parameter in the electromagnetic generating device.
  • the electrical parameter can be corresponding to the temperature of the temperature control layer. Therefore, as long as the electrical parameter is controlled within a certain range, the temperature of the temperature control layer can be maintained within a certain range, thereby achieving temperature control.
  • the patent preferably uses a temperature control layer material having a Curie point temperature between 30 degrees Celsius and 500 degrees Celsius, and can further control the temperature of the temperature control layer in the range of 30 degrees Celsius to 500 degrees Celsius, for example, by setting an electromagnetic generating device.
  • the threshold of the electrical parameter can Accurate control of the temperature of the temperature control layer, such as controlling its temperature between 180 degrees Celsius and 350 degrees Celsius or other range, thereby controlling the heating temperature of the food, this control method changes the traditional manual control mode, realizes automatic control Warm effect.
  • the control method is realized by the electrical parameter change in the electromagnetic generating device, and the electrical parameter change can be corresponding to the temperature of the temperature control layer, the control unit can quickly detect the change of the electrical parameter and adjust the control valve in time. Overcome the lag problem of temperature regulation.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of an electromagnetic generating device
  • Embodiment 2 of the present invention is a schematic structural view of Embodiment 2 of the present invention.
  • Figure 4 is a schematic diagram of a temperature control method of the present invention.
  • Fig. 5 and Fig. 6 are graphs showing the relationship between the number of pulses and temperature.
  • the present invention relates to a gas cooking device, such as a gas stove, etc.
  • the gas cooking device comprises a gas stove 2 and a cooking appliance 1 placed above the gas stove 2, preferably a cooking appliance 1, the gas stove 2 comprising a burner head 21, a hob 22, a panel 23, an intake pipe 25 and a control
  • the valve 24 and the panel 27 are provided with mounting holes, the burner head 21 is disposed in the mounting hole, the furnace frame 22 is disposed on the panel 23, and the furnace frame 22 is arranged concentrically with the burner head 21, that is, the furnace frame 22 is disposed on the furnace head.
  • the periphery of 21 is used to support the object being heated.
  • the intake pipe 25 is in communication with the burner 21 for providing a conduit for the gas supply, and the intake pipe 25 is provided with a control valve 24, which may be a solenoid valve or other valve having a function of regulating the size of the gas flow.
  • the gas cooking device further includes an electromagnetic generating device 27 and a control unit 26 disposed under the cookware 1.
  • the electromagnetic generating device 27 and the control valve 24 are electrically connected to the control unit 26, and all of the three are connected to the power source, and the electromagnetic
  • the generating device 27 is preferably fixed above or below the burner head 21, and the electromagnetic generating device is mainly composed of an electromagnetic coil, a signal generating unit, and a signal receiving unit, and the electromagnetic coils are electrically connected to the signal generating unit and the signal receiving unit, respectively.
  • 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, and the control unit 26 is preferably fixed under the panel
  • the number of the intake pipes 25 is preferably 2 to 6, and each of the intake pipes 25 is provided with a control valve 24; the total amount is controlled by controlling the flow rate of the different intake pipes 25 or closing a part of the intake pipes 25.
  • the gas flow rate, or the intake pipe 25 is composed of 2 to 6 sub-pipes, and each sub-pipe is provided with a control valve 24, and the control of the total gas flow can be realized by controlling the flow rate of each sub-pipe.
  • the pot 1 is provided with a temperature control layer 11 capable of sensing an electromagnetic signal generated by the electromagnetic generating device 27.
  • the temperature control layer 11 can be formed as a whole pot or as part of a pot, and can be combined with the pot body by riveting, welding, spraying, printing, or the like.
  • the temperature control layer 11 may be separately formed into the bottom of the pot 1 or may be compounded on the bottom of the pot 1 to become a part of the bottom of the pot 1 , and in terms of its composite position, the temperature control layer 11 may be located on the upper surface of the bottom of the pot 1 or on the lower surface of the bottom of the pot 1.
  • the bottom of the pot that is, the bottom part of the pot may be a single layer design or a composite design.
  • the bottom of the pot is formed by laminating one or more of an aluminum plate, a steel plate, a copper plate or an iron plate.
  • the temperature control layer 11 may also be disposed between the upper surface and the lower surface of the bottom of the pot.
  • the temperature control layer may also be disposed at the body portion.
  • the temperature control layer 11 has a high magnetic permeability, and the temperature control layer 11 is made of a ferromagnetic or ferrimagnetic material, such as a permalloy or a precision alloy, and its magnetic permeability will drop when it is at the Curie point.
  • a so-called permalloy that is, an iron-nickel alloy
  • the temperature-control layer 11 preferably has a magnetic permeability of 2,000 to 200,000 H/m, and a specific resistance of 30 to 130 ⁇ cm.
  • the precision alloy material is preferably a precision alloy 4J36 (manufactured by Shanghai Kaiye Metal Products Co., Ltd.) or a precision alloy 4J32 (manufactured by Shanghai Kaiye Metal Products Co., Ltd.), and the thickness of the temperature control layer 11 is preferably It is 0.1 to 3 mm, and this embodiment is 1.5 mm.
  • the temperature control layer 11 has a sheet-like structure and is compounded at the bottom of the pot 1. It may also be composed of a powdery or granular precision alloy material and attached to the bottom of the pot 1.
  • the Curie point temperature of the permalloy or precision alloy material preferably used in this embodiment is A precision alloy material between 30 degrees Celsius and 500 degrees Celsius, and further preferably a precision alloy material having a Curie point temperature of between 70 degrees Celsius and 400 degrees Celsius.
  • the following alloy materials are preferably used in the present embodiment:
  • the permalloy is also called an iron-nickel alloy, and the content of iron is 35 to 70%, more preferably 63 to 67%, and the content of nickel is 30 to 65%, and more preferably 37 to 58%.
  • Iron-nickel alloys have high magnetic permeability and will collapse to near vacuum permeability at the Curie point.
  • the control unit 26 includes a detection analysis module and a control module, and the detection analysis module is connected to the electromagnetic generation device. Specifically, as shown in FIG. 2, the detection analysis module is connected to the signal receiving unit of the electromagnetic generation device, and the detection analysis is performed. The module is used for detecting the change of the electrical parameter in the electromagnetic generating device in real time, and the change of the electrical parameter controls the influence of the temperature change of the temperature layer 11 and forms a linear relationship corresponding to the temperature of the temperature control layer 11.
  • the electrical parameter may be a pulse signal, a voltage, a current or a resistance parameter, wherein the pulse signal is preferably a pulse number, a pulse width or a pulse amplitude, etc., taking the pulse number as an example, the input end of the control module is connected to the detection analysis module. The output end is connected with the control valve. After the detection and analysis module detects the number of pulses in the electromagnetic generating device, the comparison determines whether the minimum or maximum value of the initial setting is exceeded. When the range is out of range, the control module adjusts the control valve, that is, controls the gas.
  • control module is also connected to a signal generating unit in the electromagnetic generating device.
  • the patent also provides a method for controlling the firepower of a gas cooking device, comprising the following steps:
  • the electrical parameter is a pulse signal, a voltage, a current, or a resistance, wherein the pulse signal is preferably a pulse number, a pulse width, or a pulse amplitude. Take the pulse number as an example, as shown in Figures 5 and 6.
  • the electrical parameter value in the electromagnetic generating device can determine the corresponding temperature value. Accurate control of the temperature of the temperature control layer can then be achieved by controlling the control valve.
  • step 2) further comprises setting an expected value of the electrical parameter or a temperature value corresponding to the expected value
  • step 3) acquiring a detected value of the electrical parameter in the electromagnetic generating device, and comparing the detected value with the expected set value,
  • the gas flow rate 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 may be a threshold composed of two values, such as setting a minimum value and a highest value of the electrical parameter, and the lowest value and the highest value respectively correspond to the temperature of the temperature control layer.
  • Initial settings When the set value is a threshold, the detected value of the electrical parameter of the electromagnetic generating device is compared with the set value, and when the detected value exceeds the lowest value or the highest value, the control module of the control unit is realized by adjusting the control valve.
  • the control of the amount of gas intake air thereby adjusting the temperature of the temperature control layer, causes the detected value of the electrical parameter to decrease or increase until the detected value of the electrical parameter is between the set highest and lowest values.
  • the control valve can maintain the original gas intake air amount.
  • the pulse generating unit in the electromagnetic generating device after the gas stove is operated, the pulse generating unit in the electromagnetic generating device generates a signal and transmits it to the electromagnetic coil, and the signal can be pulse number, pulse width, pulse amplitude, voltage, current.
  • the electromagnetic signal interacts with the temperature control layer and is attenuated by the temperature control layer.
  • the electrical parameters of the electromagnetic generating device The number changes with the temperature of the temperature control layer, and forms a specific correspondence relationship, the number of electrical parameters, the pulse width, the pulse amplitude, the voltage, the current or the resistance parameter, such as the number of pulses and the temperature of the temperature control layer Linear relationship.
  • the signal receiving unit in the electromagnetic generating device receives the electrical parameter, and the detecting and analyzing module of the control unit detects whether the electrical parameter exceeds an initial set value, and transmits the analysis result to a control module of the control unit, and the control module according to the analysis result Adjusting the gas flow rate by the control valve keeps the temperature of the temperature control layer within a preset interval, that is, when the detected electrical parameter is greater than or less than the set value, the control module will make the detected value of the electrical parameter by controlling the size of the control valve. Decrease or increase until the detected value of the electrical parameter is equal to or close to the set value.
  • the so-called proximity refers to the difference within a certain range that can be accepted. For example, the current value is within 0-0.5A, the voltage value is within 50V, the resistance value is within 5 ⁇ , and the pulse signal can be regarded as one within 3 Kind of approach.
  • the objects used for comparison can also convert the electrical parameter values into corresponding temperature values for comparison.
  • the temperature control layer 11 is improved on the basis of the embodiment 1.
  • the temperature control layer 11 is not disposed on the pot 1, but is independent of the pot.
  • a support plate is disposed above the hob 22, and the support plate is placed on the hob 22.
  • the support plate may also be integrated or fixed with the hob 22.
  • the temperature control layer may be composed of a powdery or granular precision alloy material or an iron-nickel alloy material and attached to the support plate.
  • the temperature control layer may also be composed of a powdery or granular precision alloy material or an iron-nickel alloy material and attached to the bottom of the pot.
  • the temperature control layer may also be disposed on the side of the electromagnetic generating device, and the temperature control purpose may be realized as long as the temperature control layer can sense the electromagnetic signal generated by the electromagnetic generating device.

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Abstract

一种燃气烹饪装置，包括炉头（21）、进气管（25）、用以控制燃气流量的控制阀（24）、能够产生电磁信号的电磁发生装置（27）和能够根据电磁信号控制控制阀（24）大小的控制单元（26）。控制阀（24）、电磁发生装置（27）分别与控制单元（26）电连接。通过控制阀（24）、控制单元（26）和电磁发生装置（27）可以实现对燃气烹饪装置火力大小的控制。

Description

一种燃气烹饪装置及控制火力大小的方法 技术领域
本发明涉及厨具技术领域，更具体地，涉及一种燃气烹饪装置，同时还涉及一种控制燃气烹饪装置火力大小的方法。
背景技术
现有的燃气烹饪装置，比如燃气灶，只要持续供气，被其加热的锅具温度就会持续升高，难以将被加热的温度控制在某一合理的范围内，只能通过手动调整燃气灶阀门大小来调整火力，但这种调整方式具有一定的滞后性，也就是说，使用者意识到火力过大时，食物已经在一定程度上被过热烹煮，造成食物营养流失、甚至焦化。而且在整个烹饪过程中，使用者需要根据烹煮阶段的需要不停的调节燃气阀门大小，操作频繁，造成使用上的诸多不便。
发明内容
本发明要解决的技术问题是克服现有技术的不足，提供一种能够方便实现温度控制的燃气烹饪装置。
为了解决上述技术问题，本发明采用的技术方案是：
一种燃气烹饪装置，包括炉头、进气管和用以控制燃气流量的控制阀，所述燃气烹饪装置还设有能够产生电磁信号的电磁发生装置和能够控制控制阀大小的控制单元，所述控制阀、电磁发生装置分别与控制单元连接。本技术方案中，所述控制单元与电加热装置、电磁发生装置之间的连接通常优选为电连接，但涉及信号传输的也可以采用无线信号连接等方式，此外，本技术方案中的连接既可以是直接连接，也可以是间接连接，即控制单元与加热装置或电磁发生装置之间可以通过一些电气元件进行连接。
本专利创造性地在燃气烹饪装置上设置电磁发生装置，使其具备发射电磁信号的功能，进而在控制单元的控制下，通过配合控制阀和能够感应该电磁信号的装置实现对温度的控制。
所述电磁发生装置上方或侧方设有能够感应电磁发生装置所产 生的电磁信号的控温层。控温层与电磁发生装置相互配合共同起到控制温度的作用，该控温层既可以和所述燃气烹饪装置固定连接，使其成为燃气烹饪装置的一部分，也可以将控温层单独加工并可拆卸式地装配于燃气烹饪装置上，使其成为一个相对独立的部件，当使用时可以随时将控温层置于电磁发生装置上方，使用完毕后，可以随时取走控温层。甚至也可以将控温层附着于能够与燃气烹饪装置配合使用的烹饪器具上，但不管何种组合方式，只要控温层能够感应到电磁发生装置所产生的电磁信号，就具备了控制温度的基本条件。
作为一种优选实施例，所述炉架上方设有能够感应电磁场的控温层，该控温层具有铁磁性或亚铁磁性。通过控温层和电磁发生装置以及控制单元、控制阀的共同作用实现对控温层温度的调整。
优选的，所述控温层的磁导率为2000～200000H/m，控温层的电阻率为30～130μΩ·cm。
优选的，本专利为了方便控制燃气流量，对进气管和控制阀进行了改进，比如，所述进气管数量优选为2至6个，每个进气管上设有一个控制阀；通过控制不同的进气管流量大小或关闭部分进气管来控制总的燃气流量，或者所述进气管由2至6个子气管组成，每个子气管上设有一个控制阀，通过控制每个子气管的流量同样可以实现对总的燃气流量的控制。
优选的，所述控制单元包括检测分析模块和控制模块，
所述检测分析模块与电磁发生装置连接，用以检测电磁发生装置中电参数的变化，并将检测值与初始设定值进行比较，将分析结果反馈给控制模块，此处所述电参数优选为脉冲信号、电压、电流或电阻参数，其中，脉冲信号为脉冲数量、脉冲宽度或脉冲幅度等；
所述控制模块的输入端与检测分析模块连接，输出端与控制阀连接，所述控制模块根据分析结果并通过控制阀调节燃气流量大小使控温层温度保持在预设区间内。具体来说，检测值与初始设定的最低和最高值比较，当检测值超出最低值或最高值时，所述控制单元的控制模块将通过调节控制阀的大小使该电参数的检测值降低或升高直至 电参数的检测值位于设定的最高和最低值之间；当电磁发生装置中电参数的检测值在设定的最高和最低值之间时，控制阀可以保持原有燃气进气量大小。检测分析和控制是控制单元的两个基本功能，在此基础上还可以增设其他功能模块，比如数据转换模块等。控制单元通过检测电磁发生装置中电参数的变化实现对温度的控制，与温度传统的传感器相比，本专利能够及时反映控温层温度，避免了温度传感器所带来的温度检测滞后性。
优选的，所述炉头上方设有烹饪器具，烹饪器具上设有能够感应电磁发生装置所产生的电磁信号的控温层。正如前文所述，该控温层并不一定附着于燃气烹饪装置上，可以安装在烹饪器具上，比如锅具，当烹饪器具与燃气烹饪装置配合使用时同样能够使得控温层与电磁发生装置相互作用，本优选方案改变了控温层的安装方式，使控温层的应用更加灵活。
优选的，所述控温层组成烹饪器具的至少一部分，即，控温层既可以单独组成锅具底部，也可以复合在锅具底部，成为锅具底部的一部分。当然，对于立体加热而言，所述控温层也可以设置在锅身部位。
优选的，所述控温层为片状，如金属薄片，或者，所述控温层由粉末状或颗粒状的坡莫合金材料或精密合金材料组成，并附着在所述锅具底部。所谓的坡莫合金材料又称为铁镍合金材料。
作为又一优选实施例，所述炉头上方设有支撑板，现有的燃气烹饪装置仅仅在炉头上设置炉架，而后将烹饪器具放置在炉架上，本优选方案，在炉头上方增设了支撑板，该支撑板可以设置在炉架上，烹饪时，将烹饪器具设置在支撑板上，该支撑板除了可以平稳的支撑烹饪器具外，还可以使得烹饪器具受热均匀。
优选的，所述控温层组成支撑板的至少一部分，即控温层既可以单独组成支撑板，也可以复合在支撑板上，组成支撑板的一部分。
优选的，所述控温层由坡莫合金材料或精密合金材料制成。
优选的，所述坡莫合金材料或精密合金材料的居里点温度在30摄氏度至500摄氏度之间。优选为70摄氏度至400摄氏度之间，进 一步优选为180摄氏度至350摄氏度之间。当控温层温度达到控温层居里点时，控温层磁导率将突降至接近零，其温度将停止升高。
更进一步的，所述精密合金材料为居里点温度在180摄氏度至230摄氏度之间的材料。例如精密合金4J36(上海凯冶金属制品有限公司生产)或精密合金4J32(上海凯冶金属制品有限公司生产)。精密合金4J36是一种具有超低膨胀系数的特殊的低膨胀铁镍合金，其居里点为230摄氏度；精密合金4J32合金又称超因瓦(Super-Invar)合金，其居里点温度为220摄氏度。
经研究验证，能够适用于本专利的精密合金材料优选为标准号为GB/T15018-94、YB/T5239-2005、YB/T5262-93、YB/T5254-2011所列举的如下合金材料，其中标准号GB/T15018-94是指《中华人民共和国国家标准精密合金牌号》，标准号YB/T5254-2011是指《中华人民共和国黑色冶金行业标准》。
合金类型 合金牌号 居里点
铁锰合金 4J59 70
恒弹性合金 3J53 110
恒弹性合金 3J53Y 110
弹性合金 Ni44MoTiAl 120
恒弹性合金 3J58 130
弹性合金 3J54 130
弹性合金 3J58 130
弹性合金 3J59 150
非晶态软磁合金 (FeNiCo)78(SiB)22 150
弹性合金 3J53 155
弹性合金 3J61 160
弹性合金 3J62 165
精密合金 4J36 230
精密合金 4J32 220
表中弹性合金3J53的化学成分包括：
C元素含量不大于0.05％；
S元素的含量不大于0.020％；
P元素的含量不大于0.020％；
Mn元素的含量不大于0.80％；
Si元素的含量不大于0.80％；
Ni元素的含量为41.5％～43.0％；
Cr元素的含量为5.2％～5.8％；
Ti元素的含量为2.3％～2.7％；
Al元素的含量为0.5％～0.8％；
余量为Fe元素。
弹性合金3J58的化学成分包括：
C元素含量不大于0.05％；
S元素的含量不大于0.020％；
P元素的含量不大于0.020％；
Mn元素的含量不大于0.80％；
Si元素的含量不大于0.80％；
Ni元素的含量为43.0％～43.6％；
Cr元素的含量为5.2％～5.6％；
Ti元素的含量为2.3％～2.7％；
Al元素的含量为0.5％～0.8％；
余量为Fe元素。
精密合金4J32的化学成分包括：
C元素含量不大于0.05％；
S元素的含量不大于0.020％；
P元素的含量不大于0.020％；
Mn元素的的含量为0.20％～0.60％；
Si元素的含量不大于0.20％；
Ni元素的含量为31.5％～33.0％；
Co元素的含量为3.2％～4.2％；
Cu元素的含量为0.4％～0.8％；
余量为Fe元素。
精密合金4J36的化学成分包括：
C元素含量不大于0.05％；
S元素的含量不大于0.020％；
P元素的含量不大于0.020％；
Mn元素的的含量为0.20％～0.60％；
Si元素的含量不大于0.30％；
Ni元素的含量为35.0％～37.0％；
余量为Fe元素。
以上合金材料可由上海凯冶金属制品有限公司生产提供或通过其他公共销售渠道获得。
除此之外，所述坡莫合金中铁的含量为35～70％，镍的含量30～65％。
所述电磁发生装置包括电磁线圈、信号发生单元、信号接收单元，所述电磁线圈分别与信号发生单元和信号接收单元连接，所述信号发生单元与控制模块连接，所述信号接收单元与检测分析模块连接，所述连接优选为电连接方式。
优选的，所述信号发生单元发出的信号为脉冲数量、脉冲宽度或脉冲幅度。信号发生单元向电磁线圈发出信号，电磁线圈接收信号后产生电磁信号。
本专利还提供了一种控制燃气烹饪装置火力大小的方法，包括如下步骤：
1)提供上述燃气烹饪装置；
2)设定该烹饪装置的温度值与电磁发生装置的电参数值之间的对应关系，所述电参数如脉冲信号、电压、电流或电阻参数，其中，脉冲 信号为脉冲数量、脉冲宽度或脉冲幅度等，因为这些电参数能够与控温层温度值之间形成特定对应关系；
3)检测并获取电磁发生装置中电参数的检测值，然后根据电参数的检测值或者该检测值所对应的温度值，通过控制阀调节燃气流量大小使烹饪装置的温度值控制在预期范围内。
优选的，步骤2)还包括设定电参数的预期值或该预期值所对应的温度值，步骤3)获取电磁发生装置中电参数的检测值，将检测值与预期设定值进行比较，当电磁发生装置电参数的检测值大于或小于设定值时，或者该电参数检测值所对应的温度值大于或小于设定值的温度值时，通过控制阀调节燃气流量大小使该电参数的检测值被控制在预期范围内。
优选的，步骤3)中通过控制单元的检测分析模块获取电磁发生装置中电参数的检测值，将检测值与步骤2)设定值进行比较，并将分析结果反馈给控制模块；所述控制模块根据该分析结果调节控制阀使电磁发生装置中的检测值等于或接近设定值。
进一步的，步骤2)中的设定值包括设定电磁发生装置电参数的最低值和最高值，步骤3)中，当电磁发生装置电参数的检测值大于设定的最高值或小于最低值时，调节控制阀使该电参数的检测值降低或升高直至电参数的检测值位于设定的最高和最低值之间。
与现有技术相比，本发明的有益效果是：
本发明在传统的燃气烹饪装置上增设了电磁发生装置，然后根据电磁发生装置中电参数的变化通过调节控制阀大小来实现对温度的调控，由于电磁发生装置中电参数的变化受控温层温度的影响，该电参数能够和控温层温度形成对应关系，因此，只要控制该电参数处于一定范围内就能够使控温层温度维持在一定范围，进而实现对温度的控制。
本专利优选使用居里点温度在30摄氏度至500摄氏度之间的控温层材料，能够进一步在30摄氏度至500摄氏度范围内实现对控温层温度的控制，比如，通过设定电磁发生装置中电参数的阈值就能够 实现控温层温度的精确控制，如将其温度控制在180摄氏度至350摄氏度之间或者其他范围，进而控制了食物的加热温度，这种控制方法改变了传统的手动控制方式，实现了自动控温的效果。另外，由于该控制方法是通过电磁发生装置中电参数变化实现的，而电参数变化能够与控温层温度形成对应关系，控制单元能够迅速检测到电参数的变化并及时对控制阀进行调整，克服了温度调控的滞后性问题。
附图说明
图1为本发明实施例1的结构示意图；
图2为电磁发生装置的结构示意图；
图3为本发明实施例2的结构示意图；
图4为本发明温度控制方法原理图；
图5、图6为脉冲数与温度关系曲线图。
具体实施方式
下面结合具体实施方式对本发明作进一步的说明。其中，附图仅用于示例性说明，表示的仅是示意图，而非实物图，不能理解为对本专利的限制；为了更好地说明本发明的实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。
本发明实施例的附图中相同或相似的标号对应相同或相似的部件；在本发明的描述中，需要理解的是，若有术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
实施例1
如图1所示，本发明涉及一种燃气烹饪装置，如燃气灶等，该燃 气烹饪装置包括燃气灶2和置于燃气灶2上方的烹饪器具1，该烹饪器具优选为锅具1，所述燃气灶2包括炉头21、炉架22、面板23、进气管25和控制阀24，面板27上设有安装孔，炉头21设于安装孔内，炉架22设于面板23上，炉架22与炉头21呈同心圆排布，即炉架22设于炉头21的外围，用以支撑被加热物体。所述进气管25与炉头21连通，用以为燃气供应提供管道，所述进气管25上设有控制阀24，该控制阀24可以是电磁阀或其他具有调节燃气气流大小功能的阀。所述燃气烹饪装置还包括设于锅具1下方的电磁发生装置27和控制单元26，所述电磁发生装置27和控制阀24均与控制单元26电连接，且三者均与电源连接，电磁发生装置27优选地固定在炉头21上方或下方，所述电磁发生装置主要由电磁线圈、信号发生单元、信号接收单元组成，所述电磁线圈分别与信号发生单元和信号接收单元电连接。电磁发生装置用以产生电磁场，电磁线圈的大小和匝数可根据实际需要自由设定，电磁发生装置与控制单元26连接，控制单元26优选地固定在面板23下方。
作为优选实施例，所述进气管25数量优选为2至6个，每个进气管25上设有一个控制阀24；通过控制不同的进气管25流量大小或关闭部分进气管25来控制总的燃气流量，或者所述进气管25由2至6个子气管组成，每个子气管上设有一个控制阀24，通过控制每个子气管的流量同样可以实现对总的燃气流量的控制。
作为另一优选实施例，所述锅具1上设有能够感应电磁发生装置27所产生的电磁信号的控温层11。该控温层11既可以做成锅具整体，也可以作为锅具的一部分，通过铆接、焊接、熔射、印刷等方法使其与锅具主体复合在一起。当控温层11设置在锅具1底部时，其既可以单独组成锅具1底部，也可以复合在锅具1底部，成为锅具1底部的一部分，就其复合位置而言，控温层11既可以位于锅具1底部的上表面，也可以位于锅具1底部的下表面。所述锅具底部，即锅底部分既可以为单层设计，也可以为复合式设计，比如，锅底是由铝板、钢板、铜板或铁板中的一个或多个复合在一起形成的。当锅具1底部为复合设计时，所述控温层11还可以设于锅底上表面和下表面之间。 当然，对于立体加热而言，所述控温层也可以设置在锅身部位。
所述控温层11具有高磁导率，所述控温层11为铁磁性或亚铁磁性材料制成，比如坡莫合金、精密合金，其磁导率在居里点时，会突降至零或接近零，所谓坡莫合金即铁镍合金，所述控温层11磁导率优选为2000～200000H/m，电阻率优选为30～130μΩ·cm。
就本实施例而言，所述精密合金材料优选为精密合金4J36(上海凯冶金属制品有限公司生产)或精密合金4J32(上海凯冶金属制品有限公司生产)，所述控温层11厚度优选为0.1至3毫米，本实施例为1.5毫米。
所述控温层11呈片状结构，复合在锅具1的底部，也可以由粉末状或颗粒状的精密合金材料组成，并附着在锅具1底部。
对本专利来说，显然凡是具备以上电阻率或铁磁性随温度变化而变化的控温层材料均可以适用于本专利，本实施例优选使用的坡莫合金或精密合金材料的居里点温度在30摄氏度至500摄氏度之间精密合金材料，进一步优选居里点温度在70摄氏度至400摄氏度之间的精密合金材料，就精密合金材料的种类而言，本实施优选使用如下合金材料：
Figure PCTCN2017092262-appb-000001
Figure PCTCN2017092262-appb-000002
所谓坡莫合金又称铁镍合金，其中铁的含量为35～70％，进一步优选为63～67％，镍的含量30～65％，进一步优选为37～58％。铁镍合金具有高磁导率，且在居里点会突降至接近真空磁导率。
所述控制单元26包括检测分析模块和控制模块，所述检测分析模块与电磁发生装置连接，具体来说，如图2所示，检测分析模块与电磁发生装置的信号接收单元连接，该检测分析模块用以实时检测电磁发生装置中电参数的变化，电参数的变化受控温层11温度变化的影响并与控温层11温度形成对应的线性关系。这种电参数可以是脉冲信号、电压、电流或电阻参数，其中，脉冲信号优选为脉冲数、脉冲宽度或脉冲幅度等，以脉冲数为例，所述控制模块的输入端与检测分析模块连接，输出端与控制阀连接，检测分析模块检测出电磁发生装置中脉冲数后，经对比判断是否超出初始设定的最低或最高值，当超出范围时，控制模块将调节控制阀，即控制燃气量大小，最终调节燃气烹饪装置的火力大小，从而达到调节控温层11温度的作用；当未超出范围，将保持当前的火力，从而保证控温层的温度维持在一定区间。此外，控制模块还与电磁发生装置中的信号发生单元连接。
本专利还提供了一种控制燃气烹饪装置火力大小的方法，包括如下步骤：
1)提供上述烹饪装置；
2)在控制模块中设置该烹饪装置的温度值与电磁发生装置的电参数值之间的对应关系，尤其是烹饪装置控温层的温度值与电磁发生装置之间的对应关系，这是由于控温层的独特物理特性，使控温层温度与电磁发生装置的电参数之间能够形成特定的对应关系，本发明利用该对应关系实现对温度的控制。所述电参数如脉冲信号、电压、电流或电阻，其中，脉冲信号优选为脉冲数、脉冲宽度或脉冲幅度等， 以脉冲数为例，如图5、6所示。
3)检测并获取电磁发生装置中电参数的检测值，然后根据电参数的检测值或者该检测值所对应的温度值，通过控制阀调节燃气流量大小使烹饪装置的温度值控制在预期范围内。
由于电磁发生装置中电参数的变化反映了控温层11的温度变化，二者之间存在特定的对应关系，因此，通过电磁发生装置中的电参数值便可以确定其所对应的温度值，然后通过控制控制阀便能够实现对控温层温度的精确控制。
优选的，步骤2)还包括设定电参数的预期值或该预期值所对应的温度值，步骤3)获取电磁发生装置中电参数的检测值，将检测值与预期设定值进行比较，当电磁发生装置电参数的检测值大于或小于设定值时，或者该电参数检测值所对应的温度值大于或小于设定值的温度值时，通过控制阀调节燃气流量大小使该电参数的检测值被控制在预期范围内。
所述电参数的设定值可以是一个值，也可以是由两个值组成的一个阈值，比如设定电参数的最低值和最高值，最低值和最高值分别对应控温层温度的两个初始设定值。当设定值是一个阈值时，将电磁发生装置中电参数的检测值与设定值进行比较，当检测值超出最低值或最高值时，所述控制单元的控制模块将通过调节控制阀实现对燃气进气量大小的控制，进而实现对控温层温度的调节，使得电参数的检测值降低或升高直至电参数的检测值位于设定的最高和最低值之间。当电磁发生装置中电参数的检测值在设定的最高和最低值之间时，控制阀可以保持原有燃气进气量大小。
具体以脉冲参数来说，如图4所示，燃气灶工作后，电磁发生装置中的脉冲发生单元产生信号并传递给电磁线圈，该信号可以为脉冲数量、脉冲宽度、脉冲幅度、电压、电流或电阻参数等能够被识别的信号，该信号被电磁发生装置的电磁线圈接收并转换成电磁信号，与此同时，控制阀开通，炉头通气后开始燃烧并对控温层进行加热，所述电磁信号与控温层作用并被控温层损耗衰减，电磁发生装置的电参 数随控温层温度的变化而变化，并形成特定对应关系，该电参数脉冲数量、脉冲宽度、脉冲幅度、电压、电流或电阻参数等，比如脉冲数与控温层温度之间所形成的线性关系。电磁发生装置中的信号接收单元接收该电参数，控制单元的检测分析模块检测该电参数是否超出初始设定值，并将该分析结果传输给控制单元的控制模块，控制模块根据该分析结果并通过控制阀调节燃气流量大小使控温层温度保持在预设区间内，即，当检测到的电参数大于或小于设定值时，控制模块将通过控制控制阀大小使该电参数的检测值降低或升高直至电参数的检测值等于或接近设定值。此处所谓的接近是指可以接受的一定范围内的差值，比如电流值在0-0.5A以内，电压值在50V以内，电阻值在5Ω以内，脉冲信号在3以内均可以认定为是一种接近。
此外用来比较的对象除了电参数外，还可以将电参数值转换成对应的温度值进行比较。
实施例2
如图3所示，本实施例在实施例1的基础上对控温层11进行了改进，在本实施例中，控温层11并非设置在锅具1上，而是独立于锅具存在，具体来说，所述炉架22上方设有支撑板，该支撑板搭放于炉架22上，作为另外一种优选实施例，所述支撑板也可以和炉架22做成一体或固定连接，所述控温层除了做成片状外，还可以由粉末状或颗粒状的精密合金材料或铁镍合金材料组成，并附着在所述支撑板上。当然，在实施例1中，所述控温层也可以由粉末状或颗粒状的精密合金材料或铁镍合金材料组成，并附着在所述锅具底部。
除此之外，所述控温层也可以设置在电磁发生装置侧方，只要控温层能够感应到电磁发生装置所产生的电磁信号即可实现控温目的。
显然，本发明的上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神 和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (22)

  1. 一种燃气烹饪装置，包括炉头、进气管和用以控制燃气流量的控制阀，其特征在于，所述燃气烹饪装置还设有能够产生电磁信号的电磁发生装置和能够控制控制阀大小的控制单元，所述控制阀、电磁发生装置分别与控制单元连接。
  2. 根据权利要求1所述的燃气烹饪装置，其特征在于，所述电磁发生装置上方或侧方设有能够感应电磁发生装置所产生的电磁信号的控温层。
  3. 根据权利要求2所述的烹饪装置，其特征在于，所述控温层的磁导率为2000～200000H/m，电阻率为30～130μΩ·cm。
  4. 根据权利要求1所述的燃气烹饪装置，其特征在于，所述进气管数量为2至6个，每个进气管上设有一个控制阀；或者，
    所述进气管由2至6个子气管组成，每个子气管上设有一个控制阀。
  5. 根据权利要求1所述的燃气烹饪装置，其特征在于，所述控制单元包括检测分析模块和控制模块，
    所述检测分析模块与电磁发生装置连接，用以检测电磁发生装置中电参数的变化，并将检测值与初始设定值进行比较，将分析结果反馈给控制模块；
    所述控制模块的输入端与检测分析模块连接，输出端与控制阀连接，所述控制模块根据分析结果并通过控制阀调节燃气流量大小使控温层温度保持在预设区间内。
  6. 根据权利要求1所述的燃气烹饪装置，其特征在于，所述炉头上方设有烹饪器具，烹饪器具上设有能够感应电磁发生装置所产生的电磁信号的控温层。
  7. 根据权利要求6所述的燃气烹饪装置，其特征在于，所述控温层组成烹饪器具的至少一部分。
  8. 根据权利要求2至7任一所述的燃气烹饪装置，其特征在于，所述控温层为片状，或者，所述控温层由粉末状或颗粒状的坡莫合金材料或精密合金材料组成。
  9. 根据权利要求2至7任一所述的燃气烹饪装置，其特征在于，所述炉头上方设有支撑板。
  10. 根据权利要求9所述的燃气烹饪装置，其特征在于，所述控温层组成支撑板的至少一部分。
  11. 根据权利要求2至7任一所述的燃气烹饪装置，其特征在于，所述控温层由坡莫合金或精密合金材料制成。
  12. 根据权利要求11所述的燃气烹饪装置，其特征在于，所述坡莫合金或精密合金材料的居里点温度在30摄氏度至500摄氏度之间。
  13. 根据权利要求12所述的燃气烹饪装置，其特征在于，所述坡莫合金或精密合金材料的居里点温度在70摄氏度至400摄氏度之间。
  14. 根据权利要求11所述的燃气烹饪装置，其特征在于，所述精密合金材料为精密合金4J36、精密合金4J32、铁锰合金4J59、恒弹性合金3J53、恒弹性合金3J53Y、恒弹性合金3J58、弹性合金3J54、弹性合金3J58、弹性合金3J59、弹性合金3J53、弹性合金3J61、弹性合金3J62、弹性合金Ni44MoTiAl、精密合金4J36、精密合金4J32或非晶态软磁合金(FeNiCo)78(SiB)22。
  15. 根据权利要求11所述的燃气烹饪装置，其特征在于，坡莫合金中铁的含量为35～70％，镍的含量30～65％。
  16. 根据权利要求1所述的燃气烹饪装置，其特征在于，所述电磁发生装置包括电磁线圈、信号发生单元、信号接收单元，所述电磁线圈分别与信号发生单元和信号接收单元连接，所述信号发生单元与控制模块连接，所述信号接收单元与检测分析模块连接。
  17. 根据权利要求16所述的燃气烹饪装置，其特征在于，所述信号发生单元发出的信号为脉冲数量、脉冲宽度、脉冲幅度、电压、电流或电阻参数。
  18. 一种控制权利要求2至17所述燃气烹饪装置的火力大小的方法，包括如下步骤：
    1)提供权利要求1至17任一所述的燃气烹饪装置；
    2)设定该烹饪装置的温度值与电磁发生装置的电参数值之间的对应 关系；
    3)检测并获取电磁发生装置中电参数的检测值，然后根据电参数的检测值或者该检测值所对应的温度值，通过控制阀调节燃气流量大小使烹饪装置的温度值控制在预期范围内。
  19. 根据权利要求18所述控制燃气烹饪装置火力大小的方法，其特征在于，步骤1)中所述电参数为脉冲信号、电压、电流或电阻参数。
  20. 根据权利要求18所述控制燃气烹饪装置火力大小的方法，其特征在于，步骤2)还包括设定电参数的预期值或该预期值所对应的温度值，步骤3)获取电磁发生装置中电参数的检测值，将检测值与预期设定值进行比较，当电磁发生装置电参数的检测值大于或小于设定值时，或者该电参数检测值所对应的温度值大于或小于设定值的温度值时，通过控制阀调节燃气流量大小使该电参数的检测值被控制在预期范围内。
  21. 根据权利要求20所述控制燃气烹饪装置火力大小的方法，其特征在于，步骤3)中通过控制单元的检测分析模块获取电磁发生装置中电参数的检测值，将检测值与步骤2)设定值进行比较，并将分析结果反馈给控制模块；所述控制模块根据该分析结果调节控制阀使电磁发生装置中的检测值等于或接近设定值。
  22. 根据权利要求21所述控制燃气烹饪装置火力大小的方法，其特征在于，步骤2)中的设定值包括设定电磁发生装置电参数的最低值和最高值，步骤3)中，当电磁发生装置电参数的检测值大于设定的最高值或小于最低值时，调节控制阀使该电参数的检测值降低或升高直至电参数的检测值位于设定的最高和最低值之间。
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