Induction temperature measuring device and temperature measuring method, cooking device and electromagnetic device

Abstract

The present invention relates to an induction temperature measuring device, characterized in that the induction temperature measuring device includes an electromagnetic device capable of generating an electromagnetic signal and a control unit connected to the electromagnetic device and capable of detecting electrical parameters in the electromagnetic device, the electromagnetic device includes a magnetic core and an electromagnetic coil, the magnetic core includes a core center column, the electromagnetic coil is arranged on the periphery of the core center column, the electromagnetic device can generate an electromagnetic signal after being energized, and the induction temperature measuring device also includes a temperature-sensitive layer capable of sensing the electromagnetic signal generated by the electromagnetic device. The present invention changes the traditional method of measuring temperature, and detects the temperature of the temperature-sensitive layer through the action of electromagnetic signals. This detection method does not require heat transfer between the test object and the electromagnetic device, and can directly test the temperature of the test object, without heat loss and heat transfer process, and the temperature measurement is more timely and accurate.

Description

Technical Field

[0001] The invention relates to an induction temperature measuring device and a temperature measuring method, and also relates to a cooking device and an electromagnetic device. Background Art

[0002] Existing temperature measurement technology usually uses thermistors, which are a type of sensitive components. According to different temperature coefficients, they are divided into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC). The typical characteristic of thermistors is that they are sensitive to temperature and show different resistance values ​​at different temperatures. The higher the temperature, the greater the resistance value of the positive temperature coefficient thermistor (PTC), and the higher the temperature, the lower the resistance value of the negative temperature coefficient thermistor (NTC). The temperature measurement process is that the object being measured transfers the temperature to the thermistor, the characteristics of the thermistor change, and the temperature is detected by judging the electrical signal of the thermistor. There is heat loss during the heat transfer process, and there is a certain hysteresis, which makes the temperature measurement inaccurate. Summary of the invention

[0003] In order to overcome at least one of the defects of the prior art described above, the present invention provides an induction temperature measuring device that can generate a magnetic signal and facilitate accurate temperature control.

[0004] The technical solution of the present invention is as follows:

[0005] An induction temperature measuring device, comprising an electromagnetic device capable of generating an electromagnetic signal and a control unit connected to the electromagnetic device and capable of detecting electrical parameters in the electromagnetic device, wherein the electromagnetic device comprises a magnetic core and an electromagnetic coil, wherein the magnetic core comprises a core center column, and the electromagnetic coil is arranged outside the core center column, and the electromagnetic device can generate an electromagnetic signal after being energized, and the induction temperature measuring device also comprises a temperature-sensitive layer capable of sensing the electromagnetic signal generated by the electromagnetic device. The electrical parameter herein is preferably a pulse signal, voltage, current or resistance parameter, wherein the pulse signal is the number of pulses, pulse width or pulse amplitude, etc.;

[0006] A magnetic tile is arranged outside the electromagnetic coil, and the magnetic tile is directly or indirectly connected to the central column of the magnetic core. The magnetic tile can be arranged to surround the electromagnetic coil as a whole, or the magnetic tile can be divided into several parts. The arrangement of the ceramic tile can facilitate the concentration of the magnetic signal and increase the strength of the electromagnetic signal.

[0007] The electromagnetic device is also provided with a bracket, the bracket is sleeved on the core middle column, and the electromagnetic coil is wound on the bracket. The electromagnetic coil can be directly arranged on the core middle column, or can be arranged on the bracket and then sleeved on the core middle column through the bracket. This method is more convenient for the winding process of the electromagnetic coil.

[0008] The bracket is provided with a first spacer, a second spacer and a bracket center column, the first spacer and the second spacer are connected through the bracket center column, the bracket center column is a hollow structure, and the electromagnetic coil is located between the first spacer and the second spacer.

[0009] The lower end of the core column is provided with a bottom disk, and the magnetic tile is connected to the core column through the bottom disk. The bottom disk is connected to the core column, or can be integrated with the core column. The arrangement of the bottom disk facilitates the conduction of electromagnetic signals.

[0010] There are three ceramic tiles surrounding the outer periphery of the electromagnetic coil, and gaps are provided between the ceramic tiles. Providing gaps between the magnetic tiles can reduce or eliminate eddy currents generated in the magnetic tiles, thereby reducing the impact on the electromagnetic model.

[0011] The height of the magnetic tile is less than the height of the core column. Preferably, the top of the magnetic tile is 1mm-15mm lower than the top of the core column, and the bottom magnetic disk thickness is 2mm-10mm. If the magnetic tile is connected to the core column, the electromagnetic signal is not convenient to diffuse outward. If the ceramic tile is not set, the electromagnetic signal is too dispersed. Therefore, the ideal electromagnetic signal strength can be obtained by controlling the positional relationship between the ceramic tile and the core column.

[0012] The core column is provided with a central hole, preferably, the diameter of the central hole is not greater than 5 mm. Providing the central hole on the core column can reduce the use of materials, and more importantly, it can facilitate the heat dissipation of the electromagnetic device.

[0013] The electromagnetic coil is composed of at least one layer of enameled wire coil.

[0014] The magnetic core center column is composed of a first section and a second section. The first section and the second section are respectively provided with concave-convex structures that can cooperate with each other. The concave-convex structures have overlapping parts in the longitudinal direction of the magnetic core center column.

[0015] A magnetic core cover plate is provided at the top of the magnetic core center column, and the diameter of the magnetic core cover plate is smaller than that of the bottom magnetic disk.

[0016] The temperature-sensitive layer is made of Permalloy or precision alloy material. Preferably, the magnetic permeability of the temperature-sensitive layer is 2000-200000 H / m, and the resistivity is 30-130 μΩ·cm.

[0017] Preferably, the Curie point temperature of the Permalloy or precision alloy material is between 30 degrees Celsius and 500 degrees Celsius.

[0018] Furthermore, the precision alloy material is a material with a Curie point temperature between 180 degrees Celsius and 230 degrees Celsius. For example, precision alloy 4J36 (produced by Shanghai Kaiye Metal Products Co., Ltd.) or precision alloy 4J32 (produced by Shanghai Kaiye Metal Products Co., Ltd.). Precision alloy 4J36 is a special low expansion iron-nickel alloy with an ultra-low expansion coefficient, and its Curie point is 230 degrees Celsius; precision alloy 4J32 alloy is also called Super-Invar alloy, and its Curie point temperature is 220 degrees Celsius.

[0019] After research and verification, 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, and YB / T5254-2011, among which the standard number GB / T15018-94 refers to the "National Standard Precision Alloy Brand of the People's Republic of China", and the standard number YB / T5254-2011 refers to the "Ferrous Metallurgy Industry Standard of the People's Republic of China".

[0020] Alloy Type Alloy grade Curie Point Iron-manganese alloy 4J59 70 Constant elastic alloy 3J53 110 Constant elastic alloy 3J53Y 110 Elastic alloy Ni44MoTiAl 120 Constant elastic alloy 3J58 130 Elastic alloy 3J54 130 Elastic alloy 3J58 130 Elastic alloy 3J59 150 Amorphous soft magnetic alloy <![CDATA[(FeNiCo) 78 (SiB) 22 ]]> 150 Elastic alloy 3J53 155 Elastic alloy 3J61 160 Elastic alloy 3J62 165 Precision Alloy 4J36 230 Precision Alloy 4J32 220

[0021] The chemical composition of the elastic alloy 3J53 in the table includes:

[0022] The C content is not more than 0.05%;

[0023] The content of S element is not more than 0.020%;

[0024] The content of P element is not more than 0.020%;

[0025] The content of Mn element is not more than 0.80%;

[0026] The content of Si element is not more than 0.80%;

[0027] The content of Ni element is 41.5% to 43.0%;

[0028] The content of Cr element is 5.2% to 5.8%;

[0029] The content of Ti element is 2.3% to 2.7%;

[0030] The content of Al element is 0.5% to 0.8%;

[0031] The balance is Fe element.

[0032] The chemical composition of elastic alloy 3J58 includes:

[0033] The C content is not more than 0.05%;

[0034] The content of S element is not more than 0.020%;

[0035] The content of P element is not more than 0.020%;

[0036] The content of Mn element is not more than 0.80%;

[0037] The content of Si element is not more than 0.80%;

[0038] The content of Ni element is 43.0% to 43.6%;

[0039] The content of Cr element is 5.2% to 5.6%;

[0040] The content of Ti element is 2.3% to 2.7%;

[0041] The content of Al element is 0.5% to 0.8%;

[0042] The balance is Fe element.

[0043] The chemical composition of precision alloy 4J32 includes:

[0044] The C content is not more than 0.05%;

[0045] The content of S element is not more than 0.020%;

[0046] The content of P element is not more than 0.020%;

[0047] The content of Mn element is 0.20% to 0.60%;

[0048] The content of Si element is not more than 0.20%;

[0049] The content of Ni element is 31.5% to 33.0%;

[0050] The content of Co element is 3.2% to 4.2%;

[0051] The content of Cu element is 0.4% to 0.8%;

[0052] The balance is Fe element.

[0053] The chemical composition of precision alloy 4J36 includes:

[0054] The C content is not more than 0.05%;

[0055] The content of S element is not more than 0.020%;

[0056] The content of P element is not more than 0.020%;

[0057] The content of Mn element is 0.20% to 0.60%;

[0058] The content of Si element is not more than 0.30%;

[0059] The content of Ni element is 35.0% to 37.0%;

[0060] The balance is Fe element.

[0061] The above alloy materials can be obtained through other public sales channels.

[0062] The temperature-sensitive layer and the electromagnetic device cooperate with each other to control the temperature. The temperature-sensitive layer can be fixedly connected to the induction temperature measuring device to become a part of the induction temperature measuring device, or the temperature-sensitive layer can be processed separately and detachably assembled on the induction temperature measuring device to become a relatively independent component. When in use, the temperature-sensitive layer can be placed on the electromagnetic device at any time, and after use, the temperature-sensitive layer can be removed at any time. The temperature-sensitive layer can even be attached to a cooking utensil that can be used with the induction temperature measuring device. Regardless of the combination, as long as the temperature-sensitive layer can sense the electromagnetic signal generated by the electromagnetic device, the basic conditions for controlling the temperature are met.

[0063] The present invention also provides a cooking device, wherein the cooking device is provided with the above-mentioned induction temperature measuring device, and the cooking device is a gas stove, an induction cooker, an electric rice cooker, or a pressure cooker.

[0064] The present invention also provides an induction temperature measurement method, comprising the following steps:

[0065] 1) A temperature-sensitive layer is provided on the surface of the object to be measured, wherein the temperature-sensitive layer is made of Permalloy or precision alloy material;

[0066] 2) An electromagnetic device is arranged below or above the temperature-sensitive layer, the electromagnetic device comprising a magnetic core and an electromagnetic coil, the magnetic core comprising a magnetic core center column, the electromagnetic coil being arranged outside the magnetic core center column, and the electromagnetic device being able to generate an electromagnetic signal after being energized;

[0067] 3) providing a control unit and connecting it to the electromagnetic device, wherein the control unit includes a detection and analysis module;

[0068] 4) Setting the corresponding relationship between the temperature value of the cooking device and the electrical parameter value of the electromagnetic device in the control module;

[0069] 5) Detect and obtain the detection value of the electrical parameter in the electromagnetic device, and then according to the detection value of the electrical parameter or the temperature value corresponding to the detection value. The electrical parameter is a pulse signal, voltage, current or resistance parameter, wherein the pulse signal is the number of pulses, pulse width or pulse amplitude, etc., because these electrical parameters can form a specific corresponding relationship with the temperature value of the temperature sensing layer.

[0070] The present invention also provides an electromagnetic device, which includes a magnetic core and an electromagnetic coil. The magnetic core includes a magnetic core center column. The electromagnetic coil is arranged outside the magnetic core center column. Magnetic tiles are arranged outside the electromagnetic coil. The magnetic tiles are directly or indirectly connected to the magnetic core center column.

[0071] The electromagnetic device is also provided with a bracket, the bracket is sleeved on the middle column of the magnetic core, and the electromagnetic coil is wound on the bracket.

[0072] The bracket is provided with a first spacer, a second spacer and a bracket center column, the first spacer and the second spacer are connected through the bracket center column, the bracket center column is a hollow structure, and the electromagnetic coil is located between the first spacer and the second spacer.

[0073] A bottom magnetic disk is provided at the lower end of the magnetic core center column, and the magnetic tile is connected to the magnetic core center column through the bottom magnetic disk.

[0074] There are three ceramic tiles surrounding the outer periphery of the electromagnetic coil, and gaps are arranged between the ceramic tiles.

[0075] The height of the magnetic tile is smaller than the height of the central column of the magnetic core.

[0076] The magnetic tile is arranged perpendicular to the bottom magnetic disk, the top of the magnetic tile is 1mm-15mm higher than the top of the center column of the magnetic core, and the thickness of the bottom magnetic disk is 2mm-10mm.

[0077] The magnetic core center column is provided with a center hole, and the diameter of the center hole is not greater than 5 mm.

[0078] The magnetic core center column is composed of a first section and a second section. The first section and the second section are respectively provided with concave-convex structures that can cooperate with each other. The concave-convex structures have overlapping parts in the longitudinal direction of the magnetic core center column.

[0079] In addition to being used in induction temperature measuring devices, the electromagnetic device can also be used in induction cookers, electric rice cookers and other devices.

[0080] The present invention changes the traditional method of measuring temperature and detects the temperature of the temperature-sensitive layer through the action of electromagnetic signals. This detection method does not require heat transfer between the test object and the electromagnetic device, and can directly test the temperature of the test object. There is no heat loss or heat transfer process, and the temperature measurement is more timely and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 It is a schematic diagram of the support structure in one embodiment of the present invention.

[0082] Figure 2 It is a schematic diagram of the use of a magnetic core in one embodiment of the present invention.

[0083] Figure 3It is a schematic cross-sectional structure diagram of a bracket and a magnetic core after being connected in one embodiment of the present invention.

[0084] Figure 4 It is a schematic diagram of the overall structure after the bracket and the magnetic core are connected in one embodiment of the present invention.

[0085] Figure 5 , Figure 6 It is a structural diagram of embodiment 2 of the present invention.

[0086] Figure 7 It is a structural diagram of embodiment 3 of the present invention.

[0087] Figure 8 , Fig. 9 This is a curve diagram showing the relationship between pulse number and temperature. DETAILED DESCRIPTION

[0088] The drawings are only for illustrative purposes and should not be construed as limiting the present invention. To better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limiting the present invention.

[0089] Example 1

[0090] like Figure 1 He Ru Figure 2 As shown, the present invention provides an electromagnetic device, including a bracket 1 and a magnetic core 2, wherein the bracket 1 is provided with a first spacer 12 and a second spacer 13, and the first spacer 12 and the second spacer 13 are connected by a middle column 14. A mounting groove is formed between the first spacer 12 and the second spacer 13, and an electromagnetic coil is provided on the mounting groove.

[0091] The bracket 1 is provided with a mounting hole 11, and the magnetic core 2 is provided with a magnetic core middle column 21, and the magnetic core middle column 21 can be engaged with the mounting hole 11 to realize the connection between the bracket 1 and the magnetic core 2. The magnetic core 2 is provided with a magnetic disk connected to the magnetic core middle column 21. In this embodiment, the bottom magnetic disk 23 is connected with a magnetic tile 24, and the magnetic tile 24 is arranged perpendicular to the bottom magnetic disk 23. The ceramic tile 24 can also be at a certain angle with the bottom magnetic disk 23, such as 85-95 degrees. The material of the magnetic core 2 is preferably manganese-zinc ferrite, and the magnetic column middle column and the bottom magnetic disk can be set as an integral molding, or can be set as a separate molding, and connected together by glue or the like.

[0092] like Figure 2As shown, the bottom magnetic disk 23 can be made into a whole or composed of a plurality of magnetic disk units, which are arranged radially along the core center column 21, and the number of magnetic disk units is limited to 2-6. A gap is provided on the bottom magnetic disk 23 to reduce or eliminate the eddy current generated on the bottom magnetic disk, and the number of the gaps can be preferably 1-5. When the bottom magnetic disk 23 is composed of a plurality of magnetic disk units, a certain space can be reserved when the plurality of magnetic disk units are arranged to form the gap.

[0093] Meanwhile, a positioning piece is provided on the bracket 1 . When the bracket 1 is connected to the magnetic core 2 , the positioning piece is engaged with the gap to achieve a stable connection between the bracket 1 and the magnetic core 2 .

[0094] In this embodiment, the bottom magnetic disk is in the shape of a disk as a whole, and the thickness of the bottom magnetic disk 23 is 2 mm to 10 mm. Meanwhile, the core center column 21 is provided with a center hole 22, and the diameter of the center hole 22 is not greater than 5 mm.

[0095] Preferably, the height of the magnetic tile 24 is smaller than the height of the core center column 21. Preferably, the top of the magnetic tile is 1mm-15mm lower than the top of the core center column. The ceramic tile 24 is connected to the core center column 21 through the bottom magnetic disk 23, and the top of the ceramic tile 24 is not connected to the core center column 21. In the working state, this structural form is conducive to maximizing the aggregation and guidance of magnetic lines of force, thereby improving the induction strength of the electromagnetic device.

[0096] like Figure 3 He Ru Figure 4 As shown, in this embodiment, the bracket 1 is provided with a terminal 3, one end of the terminal 3 is connected to the electromagnetic coil, and the other end is connected to the control unit 3. The connection between the electromagnetic coil and the control unit 3 is achieved through the action of the terminal 3. The bracket 1 is generally made of non-conductive material, and the terminal 3 is made of conductive material.

[0097] In this embodiment, an electromagnetic coil composed of at least one layer of enameled wire coil is provided between the first spacer 12 and the second spacer 13. The enameled wire coil is made of a single strand or multiple strands of enameled wire, and the enameled wire coil is provided with 1 to 30 layers. In this embodiment, the diameter of the enameled wire is between 0.03 mm and 0.2 mm, and preferably, the diameter of the enameled wire is between 0.1 mm and 0.15 mm. The enameled wire conductor is made of copper or aluminum, and the enameled wire coating is made of an enameled coating with self-adhesive properties, such as self-adhesive enameled wire paints such as polyvinyl butyral and epoxy resin. The electromagnetic coil described in this patent refers to a carrier that can generate an electromagnetic signal under the action of an electric current signal. Its specific form can be made of the wire described in this embodiment, or it can be in other forms, such as etching in the core column, or replacing the wire with copper foil or printed circuits.

[0098] Example 2

[0099] like Figure 5 , 6 As shown, based on Example 1, this embodiment adds a core cover plate 25, and the core cover plate 25 is arranged on the top of the core center column. Preferably, the diameter of the core cover plate 25 is smaller than the diameter of the bottom magnetic disk. The core cover plate 25 and the core center column can be integrally formed or detachably connected.

[0100] Preferably, the core center column is composed of a first section 26 and a second section 27, and the first section 26 and the second section 27 are respectively provided with concave-convex structures that can cooperate with each other. In the longitudinal direction of the core center column, the concave-convex structure has an overlapping part 28, and the height of the overlapping part 28 is 0.03-3 mm. The concave-convex structure increases the contact area between the core components, which can reduce magnetic leakage. The larger the contact area, the better the effect. Therefore, the concave-convex structure can be made not only into a regular cylindrical shape, but also into a curved concave-convex structure.

[0101] Example 3

[0102] like Figure 7 As shown, the present patent also provides a cooking device, such as a gas stove, comprising a gas stove 5 and a cooking utensil 4 placed above the gas stove 5, the cooking utensil is preferably a pot 4, the gas stove 5 comprises a burner 51, a grate 52, a panel 53, an air inlet pipe 55 and a control valve 54, a mounting hole is provided on the panel 57, the burner 51 is arranged in the mounting hole, the grate 52 is arranged on the panel 53, the grate 52 and the burner 51 are arranged in concentric circles, that is, the grate 52 is arranged on the periphery of the burner 51 to support the heated object. The air inlet pipe 55 is connected to the burner 51 to provide a pipeline for gas supply, and a control valve 54 is provided on the air inlet pipe 55, the control valve 54 can be a solenoid valve or other valve with the function of adjusting the size of the gas flow. The induction temperature measuring device also includes an electromagnetic device 57 and a control unit 56 arranged below the pot 4. The electromagnetic device 57 and the control valve 54 are electrically connected to the control unit 26, and all three are connected to a power supply. The electromagnetic device 57 is preferably fixed above or below the burner 51. The structural features of the electromagnetic device 57 are as described in Example 1. The electromagnetic device is connected to the control unit 56, and the control unit 56 is preferably fixed below the panel 53.

[0103] As another preferred embodiment, the pot 4 is provided with a temperature-sensitive layer 41 capable of sensing the electromagnetic signal generated by the electromagnetic device 57. The temperature-sensitive layer 41 can be made into the pot as a whole, or as a part of the pot, and can be combined with the pot body by riveting, welding, spraying, printing, etc. When the temperature-sensitive layer 11 is arranged at the bottom of the pot 1, it can either form the bottom of the pot 4 alone, or be combined at the bottom of the pot 4 to become a part of the bottom of the pot 4. In terms of its combined position, the temperature-sensitive layer 41 can be located at the upper surface of the bottom of the pot 4 or at the lower surface of the bottom of the pot 4. The bottom of the pot, that is, the bottom part of the pot can be either a single-layer design or a composite design. For example, the bottom of the pot is formed by combining one or more of an aluminum plate, a steel plate, a copper plate or an iron plate. When the bottom of the pot 4 is a composite design, the temperature-sensitive layer 41 can also be arranged between the upper surface and the lower surface of the bottom of the pot. Of course, for three-dimensional heating, the temperature-sensitive layer can also be arranged at the pot body.

[0104] In addition, the temperature sensing layer 41 may also be provided separately from the cookware 41 , for example, the temperature sensing layer 41 is provided on the stove rack as an independent component, and then the cookware or other utensils are placed on the temperature sensing layer.

[0105] The temperature-sensitive layer 41 has high magnetic permeability. The temperature-sensitive layer 41 is made of ferromagnetic or ferrimagnetic materials, such as Permalloy and precision alloy. Its magnetic permeability drops suddenly to zero or close to zero at the Curie point. The so-called Permalloy is an iron-nickel alloy. The magnetic permeability of the temperature-sensitive layer 41 is preferably 2000-200000 H / m, and the resistivity is preferably 30-130 μΩ·cm.

[0106] In this embodiment, the precision alloy material is preferably precision alloy 4J36 (produced by Shanghai Kaiye Metal Products Co., Ltd.) or precision alloy 4J32 (produced by Shanghai Kaiye Metal Products Co., Ltd.), and the thickness of the temperature sensing layer 41 is preferably 0.1 to 3 mm, and is 1.5 mm in this embodiment.

[0107] The temperature sensing layer 41 is in a sheet-like structure and is compounded on the bottom of the cookware 4 . It can also be composed of a powdered or granular precision alloy material and attached to the bottom of the cookware 4 .

[0108] For this patent, it is obvious that any temperature-sensitive layer material with the above resistivity or ferromagnetism changing with temperature can be applied to this patent. The preferred permalloy or precision alloy material used in this embodiment has a Curie point temperature between 30 degrees Celsius and 500 degrees Celsius, and further preferred is a precision alloy material with a Curie point temperature between 70 degrees Celsius and 400 degrees Celsius. In terms of the types of precision alloy materials, this embodiment preferably uses the following alloy materials:

[0109]

[0110]

[0111] Permalloy is also called iron-nickel alloy, wherein the iron content is 35-70%, preferably 63-67%, and the nickel content is 30-65%, preferably 37-58%. Iron-nickel alloy has high magnetic permeability, and at the Curie point it drops suddenly to near vacuum magnetic permeability.

[0112] The electromagnetic device 57, the temperature sensing layer 41 and the control unit constitute an induction temperature measuring device.

[0113] The control unit 56 includes a detection and analysis module and a control module. The detection and analysis module is connected to the electromagnetic device and is used to detect the change of electrical parameters in the electromagnetic device in real time. The change of electrical parameters is affected by the temperature change of the temperature sensing layer 41 and forms a corresponding relationship with the temperature of the temperature sensing layer 41, thereby realizing the measurement of temperature. The electrical parameters can be pulse signals, voltage, current or resistance parameters, wherein the pulse signal is preferably the number of pulses, pulse width or pulse amplitude, etc.

[0114] On the basis of temperature measurement, this patent can also realize temperature control. Taking the number of pulses as an example, 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. After the detection and analysis module detects the number of pulses in the electromagnetic device, it compares and determines whether it exceeds the initial minimum or maximum value. When it exceeds the range, the control module will adjust the temperature adjustment device, that is, the control valve, to control the amount of gas, and finally adjust the firepower of the cooking device, so as to achieve the effect of adjusting the temperature of the temperature-sensitive layer 41; when it does not exceed the range, the current firepower will be maintained to ensure that the temperature of the temperature-sensitive layer is maintained within a certain range. In addition, the control module is also connected to the signal generating unit in the electromagnetic device.

[0115] Specifically, after the gas stove is working, the pulse generating unit in the electromagnetic device generates a signal and transmits it to the electromagnetic coil. The signal can be an identifiable signal such as the number of pulses, pulse width, pulse amplitude, voltage, current or resistance parameters. The signal is received by the electromagnetic coil of the electromagnetic device and converted into an electromagnetic signal. At the same time, the control valve is opened, the burner starts to burn after ventilation and heats the temperature-sensitive layer. The electromagnetic signal acts on the temperature-sensitive layer and is attenuated by the loss of the temperature-sensitive layer. The electrical parameters of the electromagnetic device change with the temperature of the temperature-sensitive layer and form a specific corresponding relationship, such as the electrical parameters such as the number of pulses, pulse width, pulse amplitude, voltage, current or resistance parameters, and the corresponding relationship between the number of pulses and the temperature of the temperature-sensitive layer. The signal receiving unit in the electromagnetic 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 control module adjusts the gas flow rate through the control valve according to the analysis result to keep the temperature of the temperature-sensitive layer within the preset range, that is, when the detected electrical parameter is greater than or less than the set value, the control module will control the control valve size to reduce or increase the detection value of the electrical parameter until the detection value of the electrical parameter is equal to or close to the set value. The so-called proximity here refers to the difference within a certain range that can be accepted, such as a current value within 0-0.5A, a voltage value within 50V, a resistance value within 5Ω, and a pulse signal within 3 can all be considered as a kind of proximity.

[0116] This patent also provides an induction temperature measurement method, comprising the following steps:

[0117] 1) A temperature-sensitive layer is provided on the surface of the object to be measured, wherein the temperature-sensitive layer is made of Permalloy or precision alloy material;

[0118] 2) An electromagnetic device is arranged below or above the temperature-sensitive layer, the electromagnetic device comprising a magnetic core and an electromagnetic coil, the magnetic core comprising a magnetic core center column, the electromagnetic coil being arranged outside the magnetic core center column, and the electromagnetic device being able to generate an electromagnetic signal after being energized;

[0119] 3) providing a control unit and connecting it to the electromagnetic device, wherein the control unit includes a detection and analysis module;

[0120] 4) A correspondence between the temperature value of the cooking device and the electrical parameter value of the electromagnetic device is set in the control module. This is because the unique physical properties of the temperature-sensing layer enable a specific correspondence to be formed between the temperature of the temperature-sensing layer and the electrical parameters of the electromagnetic device. This patent uses this correspondence to achieve temperature control.

[0121] 5) Detect and obtain the detection value of the electrical parameter in the electromagnetic device, and then according to the detection value of the electrical parameter or the temperature value corresponding to the detection value. The electrical parameter is a pulse signal, voltage, current or resistance parameter, wherein the pulse signal is the number of pulses, pulse width or pulse amplitude, etc., because these electrical parameters can form a specific corresponding relationship with the temperature value of the temperature sensing layer.

[0122] In addition to the gas stove, the above cooking device can also be an induction cooker, an electric rice cooker, a pressure cooker, etc.

[0123] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An induction temperature measuring device, characterized in that: The induction temperature measuring device comprises an electromagnetic device capable of generating an electromagnetic signal and a control unit connected to the electromagnetic device and capable of detecting electrical parameters in the electromagnetic device, the electromagnetic device comprises a magnetic core and an electromagnetic coil, the magnetic core comprises a magnetic core center column, the electromagnetic coil is arranged on the periphery of the magnetic core center column, the electromagnetic device can generate an electromagnetic signal after being energized, and the induction temperature measuring device also comprises a temperature-sensitive layer capable of sensing the electromagnetic signal generated by the electromagnetic device; a magnetic tile is arranged on the periphery of the electromagnetic coil, and the magnetic tile is directly or indirectly connected to the magnetic core center column; the height value of the magnetic tile is less than the height value of the magnetic core center column; the magnetic core center column consists of a first section and a second section, the first section and the second section are respectively provided with concave-convex structures that can cooperate with each other, and the concave-convex structures on the magnetic core center column have overlapping parts in the longitudinal direction; A bottom magnetic disk is provided at the lower end of the core column, the magnetic tile is connected to the core column through the bottom magnetic disk, the top of the magnetic tile is 1mm-15mm lower than the top of the core column, and the thickness of the bottom magnetic disk is 2mm-10mm; The electromagnetic device is also provided with a bracket, the bracket is sleeved on the middle column of the magnetic core, and the electromagnetic coil is wound on the bracket; the bracket is provided with a first spacer, a second spacer and a middle column of the bracket, the first spacer and the second spacer are connected through the middle column of the bracket, the middle column of the bracket is a hollow structure, and the electromagnetic coil is located between the first spacer and the second spacer; a gap is provided on the bottom magnetic disk, and a positioning piece is provided on the bracket, and when the bracket is connected to the magnetic core, the positioning piece is embedded in the gap.

2. The induction temperature measuring device according to claim 1, characterized in that: There are three magnetic tiles surrounding the outer periphery of the electromagnetic coil, and gaps are arranged between the magnetic tiles.

3. The induction temperature measuring device according to claim 1, characterized in that: The magnetic core center column is provided with a center hole.

4. The induction temperature measuring device according to claim 1, characterized in that: The electromagnetic coil is composed of at least one layer of enameled wire coil.

5. The induction temperature measuring device according to claim 4, characterized in that: A magnetic core cover plate is provided at the top of the magnetic core center column, and the diameter of the magnetic core cover plate is smaller than that of the bottom magnetic disk.

6. The induction temperature measuring device according to any one of claims 1 to 5, characterized in that: The temperature sensing layer is made of Permalloy.

7. The induction temperature measuring device according to any one of claims 1 to 5, characterized in that: The temperature sensing layer is made of precision alloy material.

8. The induction temperature measuring device according to claim 7, characterized in that: The precision alloy material is precision alloy 4J36, precision alloy 4J32, iron-manganese alloy 4J59, constant elastic alloy 3J53, constant elastic alloy 3J53Y, constant elastic alloy 3J58, elastic alloy 3J54, elastic alloy 3J58, elastic alloy 3J59, elastic alloy 3J53, elastic alloy 3J61, elastic alloy 3J62, elastic alloy Ni44MoTiAl, precision alloy 4J36, precision alloy 4J32 or amorphous soft magnetic alloy (FeNiCo)78(SiB)22.

9. The induction temperature measuring device according to claim 7, characterized in that: The control unit comprises a detection and analysis module, which is connected to the electromagnetic device and is used to detect electrical parameters in the electromagnetic device.

10. The induction temperature measuring device according to claim 9, characterized in that: The induction temperature measuring device also includes a temperature regulating device, and the control unit also includes a control module. The input end of the control module is connected to the detection and analysis module, and the output end is connected to the temperature regulating device. The control module adjusts the temperature of the temperature sensing device through the temperature regulating device according to the detection result.

11. A cooking device, characterized in that: The cooking device is provided with the induction temperature measuring device according to any one of claims 1 to 10.

12. The cooking device according to claim 11, characterized in that The cooking device is a gas stove, an induction cooker, an electric rice cooker or a pressure cooker.

13. An induction temperature measurement method, based on the induction temperature measurement device according to any one of claims 1 to 10, comprising the following steps: 1) A temperature-sensitive layer is arranged on the surface of the object to be measured, wherein the temperature-sensitive layer is made of precision alloy material; 2) Arranging the electromagnetic device below or above the temperature sensing layer; 3) Providing a control unit and connecting it to the electromagnetic device, wherein the control unit includes a detection and analysis module; 4) Setting the corresponding relationship between the temperature value of the cooking device and the electrical parameter value of the electromagnetic device in the control module; 5) Detect and obtain the detection value of the electrical parameter in the electromagnetic device, and then determine the temperature value corresponding to the detection value of the electrical parameter or the detection value.

14. An induction temperature measurement method, based on the induction temperature measurement device according to any one of claims 1 to 10, comprising the following steps: 1) A temperature-sensitive layer is arranged on the surface of the object to be measured, wherein the temperature-sensitive layer is made of a Permalloy material; 2) Arranging the electromagnetic device below or above the temperature sensing layer; 3) Providing a control unit and connecting it to the electromagnetic device, wherein the control unit includes a detection and analysis module; 4) Setting the corresponding relationship between the temperature value of the cooking device and the electrical parameter value of the electromagnetic device in the control module; 5) Detect and obtain the detection value of the electrical parameter in the electromagnetic device, and then determine the temperature value corresponding to the detection value of the electrical parameter or the detection value.

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