Induction cooker with temperature detection function

Abstract

The utility model discloses an induction cooker with a temperature detection function, which relates to the technical field of intelligent household appliances and comprises a power supply, a magnetic induction element, a magnetic induction sensor, a magnetic shielding element, an amplifier, a filter, a signal processing unit and a display unit. The magnetic induction sensor is connected with the amplifier, the amplifier is connected with the filter, the filter is connected with the signal processing unit, the signal processing unit is connected with the display unit, and the magnetic induction element and the magnetic induction sensor are arranged in the magnetic shielding element. According to the induction cooker, the magnetic induction element is arranged in the induction cooker, the magnetic induction sensor is used, the temperature change in the induction cooker can be monitored in real time, meanwhile, the digital display is used for displaying the current temperature value obtained through the digital signal processor, and visual temperature information is provided for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent household appliances, in particular to an induction cooker with temperature detection function. Background Art

[0002] The induction cooker, which is now widely used in modern kitchens, uses LC resonance to generate a strong magnetic field to heat the induction cooker's stove plate. There is no need to generate an open flame to heat the pot. Compared with the traditional open flame heating stove, the induction cooker is an efficient, clean and energy-saving kitchen appliance. Due to the circuit structure inside the induction cooker, it is necessary to detect the internal temperature to prevent the internal temperature from being too high and causing a fire. At the same time, since the commonly used infrared sensor can only measure the surface temperature linearly, when the infrared sensor is used for measurement, only the temperature of a certain point can be measured, and the detection result is not accurate enough. The prior art provides a temperature measurement system for an electromagnetic heating device, which measures the temperature of the heating area by arranging a temperature sensing component above the panel and a magnetic induction component below the panel. At the same time, the system does not eliminate the influence of the magnetic field generated by the induction cooker itself on the magnetic induction component, so that the detection result is not accurate enough. Utility Model Content

[0003] Based on the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an induction cooker with temperature detection to solve the technical problems.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an induction cooker with temperature detection, comprising a power supply, a magnetic induction element, a magnetic induction sensor, a magnetic shielding element, an amplifier, a filter, a signal processing unit, and a display unit, wherein the output end of the power supply is connected to the input end of the magnetic induction element, the output end of the power supply is connected to the input end of the magnetic induction sensor, the output end of the magnetic induction sensor is connected to the input end of the amplifier, the output end of the amplifier is connected to the input end of the filter, the output end of the filter is connected to the input end of the signal processing unit, the output end of the signal processing unit is connected to the input end of the display unit, and the magnetic induction element and the magnetic induction sensor are arranged inside the magnetic shielding element.

[0005] The utility model is further configured that the magnetic induction element is arranged below the induction coil, and the magnetic induction element produces a magnetic change when the temperature changes, thereby generating a magnetic signal.

[0006] The utility model is further configured that the magnetic induction element is designed by ferrite.

[0007] The utility model is further configured that the magnetic induction sensor is used to measure the magnetic signal generated by the magnetic induction element and convert the magnetic signal into an electrical signal.

[0008] The utility model is further configured that the magnetic shielding element is used to shield the influence of the magnetic field generated by the induction cooker on the magnetic induction sensor, and the magnetic shielding element is a magnetic material, and the magnetic material includes a high-permeability magnetic alloy.

[0009] The utility model is further configured that the amplifier is an instrument amplifier, and the instrument amplifier is used to amplify the electrical signal.

[0010] The utility model is further configured that the filter is a low-pass filter, and the low-pass filter is used to allow low-frequency signals to pass through and block high-frequency signals.

[0011] The utility model is further configured that the signal processing unit is a digital signal processor, and the digital signal processor is used to convert the electrical signal into a digital signal and obtain the current temperature value according to the digital signal.

[0012] The utility model is further configured that the display unit is a digital display, and the display unit is used to display the current temperature value.

[0013] In summary, the utility model mainly has the following beneficial effects:

[0014] 1. The utility model can monitor temperature changes in real time by arranging magnetic induction elements and using magnetic induction sensors inside the induction cooker. At the same time, a digital display is used to display the current temperature value obtained by a digital signal processor, thereby providing users with intuitive temperature information and preventing fires caused by excessive internal temperatures.

[0015] 2. The utility model uses a magnetic shielding element to shield the interference of the magnetic field generated by the induction cooker on the magnetic induction sensor, so that the magnetic signals obtained by the magnetic induction sensor all come from the magnetic induction element, thereby improving the stability and accuracy of the system. Ferrite is used as the material of the magnetic induction element. Ferrite is sensitive to temperature changes and produces magnetic changes, thereby generating a magnetic signal, providing a reliable signal source for temperature detection. At the same time, the magnetic shielding element can shield the magnetic field generated under the induction coil to improve safety.

[0016] 3. The utility model amplifies the signal output by the magnetic induction sensor through an instrument amplifier to ensure that the weak magnetic signal can be correctly read by the subsequent processing unit, removes high-frequency noise through a low-pass filter to ensure the stability and accuracy of the sensor signal, and converts the electrical signal generated by the magnetic induction sensor into a digital signal through a digital signal processor and processes it, thereby improving the accuracy and sensitivity of temperature measurement.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 The present invention is a schematic structural diagram of an induction cooker with temperature detection function, showing an exemplary embodiment of the present invention.

[0020] In the figure: 1. power supply; 2. magnetic induction element; 3. magnetic induction sensor; 4. magnetic shielding element; 5. amplifier; 6. filter; 7. signal processing unit; 8. display unit. DETAILED DESCRIPTION

[0021] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0023] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0024] The following describes an embodiment of the utility model based on its overall structure.

[0025] An induction cooker with temperature detection, such as Figure 1 As shown, it includes a power supply 1, a magnetic induction element 2, a magnetic induction sensor 3, a magnetic shielding element 4, an amplifier 5, a filter 6, a signal processing unit 7, and a display unit 8. The output end of the power supply 1 is connected to the input end of the magnetic induction element 2, the output end of the power supply 1 is connected to the input end of the magnetic induction sensor 3, the output end of the magnetic induction sensor 3 is connected to the input end of the amplifier 5, the output end of the amplifier 5 is connected to the input end of the filter 6, the output end of the filter 6 is connected to the input end of the signal processing unit 7, the output end of the signal processing unit 7 is connected to the input end of the display unit 8, and the magnetic induction element 2 and the magnetic induction sensor 3 are arranged inside the magnetic shielding element 4.

[0026] Specifically, the power supply 1 provides electric energy to drive various components of the induction cooker, the output end of the power supply is connected to the input end of the magnetic induction element 2, and is also connected to the input end of the magnetic induction sensor 3, and the power supply provides power to the magnetic induction element 2 and the magnetic induction sensor 3; the magnetic induction element 2 is arranged below the induction coil, and will produce magnetic changes when the temperature changes, generating a magnetic signal; the magnetic induction sensor 3 is located inside the magnetic shielding element 4, and is used to measure the magnetic signal generated by the magnetic induction element 2 and convert the magnetic signal into an electrical signal, and the output end of the sensor is connected to the input end of the amplifier 5; the magnetic shielding element 4 is located between the magnetic induction element and the magnetic induction sensor, and is used to shield the influence of the magnetic field generated by the induction cooker on the magnetic induction sensor; the amplifier 5 amplifies the signal output by the magnetic induction sensor to ensure that the tiny magnetic signal can be correctly processed by the subsequent filter; the filter 6 is used to filter out noise and unnecessary frequency components in the signal; the signal processing unit 7 is a digital signal processor, which is responsible for converting the filtered signal into a digital signal and obtaining the current temperature value according to the digital signal; the display unit 8 is a digital display, which is used to display the current temperature value obtained by the signal processing unit, and provide intuitive temperature information for the user.

[0027] Furthermore, the magnetic induction element 2 is designed with ferrite; ferrite is a type of magnetic ceramic material with good magnetic properties. In ferrite, changes in temperature will affect its lattice structure, thereby changing the direction and strength of the magnetic moment. This change causes changes in the magnetism of the ferrite, and the temperature can be indirectly measured by measuring changes in the magnetic field through the magnetic induction sensor 3. The relationship between the magnetic properties of ferrite and temperature can be understood by examining the Curie point of ferrite. The Curie point refers to the temperature below which the ferrite material is ferromagnetic, and above which the material will lose its ferromagnetism.

[0028] In ferrites, changes in temperature will cause changes in the lattice structure, thereby affecting the magnetic properties of the material. Specifically, below the Curie point, the lattice structure of the ferrite will make the material ferromagnetic, and the directions of the magnetic moments will be arranged with each other to form an overall magnetic moment. Above the Curie point, due to the increase in temperature, the lattice structure changes, causing the ferromagnetism to weaken or disappear. The relationship between the change in magnetic field and the change in temperature can usually be expressed by the formula: M = C (T - Tc), where M is the magnetic moment of the ferrite, C is the Curie constant of the ferrite, representing the slope of the change in the magnetic properties of the material with temperature, T is the current temperature, and Tc is the Curie point temperature of the ferrite. The Curie point temperature depends on the specific composition. Different types of ferrites have different Curie point temperatures, usually between several hundred degrees Celsius and thousands of degrees Celsius. For common ferrites, such as iron oxide (Fe3O4), the Curie point temperature is about 585 degrees Celsius. The formula describes the effect of temperature on the magnetism of ferrites. When the temperature T is close to or equal to the Curie point Tc, the change in the magnetic moment M will become very significant. By measuring the change in the magnetic field, the change in temperature can be indirectly measured. This principle is applied to magnetic induction temperature sensors, and the change in the magnetic field output by them is related to the temperature.

[0029] Furthermore, the magnetic shielding element 4 is used to shield the influence of the magnetic field generated by the electromagnetic cooker on the magnetic induction sensor. The magnetic shielding element 4 is made of magnetic material, and the magnetic material includes a high-permeability alloy. The main function of the magnetic shielding element 4 is to shield the influence of the magnetic field generated by the electromagnetic cooker on the magnetic induction sensor 3, and ensure that the signal measured by the magnetic induction sensor mainly comes from the magnetic induction element 2 without being interfered by the magnetic field of other parts of the electromagnetic cooker. The magnetic shielding element is made of magnetic material, and the magnetic material includes a high-permeability alloy. The high-permeability alloy is a nickel-iron alloy with excellent magnetic permeability and magnetic shielding performance. It is widely used to shield electromagnetic fields and prevent magnetic fields from spreading to sensitive areas. The high-permeability alloy can absorb or reflect magnetic fields through its high magnetic permeability, thereby preventing the magnetic field from propagating to the magnetic induction sensor through the magnetic shielding element. This helps to ensure that the main magnetic field to which the magnetic induction sensor is subjected comes from the magnetic induction element rather than other parts of the electromagnetic cooker.

[0030] Furthermore, the amplifier 5 is an instrumentation amplifier, which is used to amplify electrical signals. An instrumentation amplifier (Instrumentation Amplifier) ​​is a specially designed differential amplifier with a high common-mode rejection ratio and a low input bias current. Instrumentation amplifiers are often used in measurement systems to process small signals. In an induction cooker, an instrumentation amplifier can provide better anti-interference performance and is suitable for scenarios requiring high-precision temperature measurement.

[0031] Furthermore, the filter 6 is a low-pass filter, which is used to allow low-frequency signals to pass through and block high-frequency signals; the low-pass filter can effectively suppress the high-frequency noise of the heating magnetic field generated by the induction cooker itself and retain the low-frequency signals related to temperature changes.

[0032] Furthermore, the signal processing unit 7 is a digital signal processor, which is used to convert the electrical signal into a digital signal and obtain the current temperature value according to the digital signal; the display unit 8 is a digital display, which is used to display the current temperature value; the main function of the digital signal processor is to convert the analog electrical signal obtained from the magnetic induction sensor after amplification and filtering into a digital signal, the digital signal processor is responsible for processing the digital signal, and calculating the current temperature value according to the processed digital signal; the digital display is used to display the current temperature value obtained after processing by the digital signal processor to the user in digital form, and the digital display can use LCD (liquid crystal display) technology to show the current temperature of the induction cooker to the user in an intuitive and clear manner, and the digital display method provides a user-friendly interface, allowing the user to easily monitor the working temperature of the induction cooker.

[0033] The working principle of the utility model is as follows: an induction cooker with temperature detection provides electric energy to the whole system through a power supply, and the output end is connected to a magnetic induction element, which is a ferrite and is placed inside the induction cooker to generate magnetic changes when the temperature changes; at the same time, a magnetic induction sensor is placed inside a magnetic shielding element, and its function is to detect the magnetic signal generated by the magnetic induction element. In order to ensure that the signal received by the magnetic induction sensor mainly comes from the magnetic induction element rather than the magnetic field of other parts of the induction cooker, the magnetic shielding element adopts magnetic materials, including high magnetic permeability alloys, to shield the influence of other magnetic fields; the amplifier is responsible for amplifying the weak signal output by the magnetic induction sensor to ensure that the subsequent signal can be accurately read. In order to reduce possible electromagnetic noise or other interference, a filter is used. It includes a low-pass filter, whose function is to allow low-frequency signals to pass through and block high-frequency signals; in the signal processing unit, a digital signal processor takes over the signal processing work, and the digital signal processor converts the signal output by the magnetic induction sensor into a digital signal, and converts the digital signal into a corresponding temperature value, thereby improving the accuracy of the signal and making the temperature processing more intelligent and flexible; the current temperature value obtained is presented to the user in an intuitive digital form through a digital display. The working principle of the utility model fully reflects the application of advanced electronic technology in household appliances, and provides users with a convenient, efficient and intelligent temperature control experience. The whole process realizes real-time monitoring and digital display of the internal temperature of the induction cooker through a clever electronic structure, thereby preventing the internal temperature from being too high and causing a fire.

[0034] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An induction cooker with temperature detection function, comprising a power supply (1), a magnetic induction element (2), a magnetic induction sensor (3), a magnetic shielding element (4), an amplifier (5), a filter (6), a signal processing unit (7), and a display unit (8), characterized in that: The output end of the power supply (1) is connected to the input end of the magnetic induction element (2), the output end of the power supply (1) is connected to the input end of the magnetic induction sensor (3), the output end of the magnetic induction sensor (3) is connected to the input end of the amplifier (5), the output end of the amplifier (5) is connected to the input end of the filter (6), the output end of the filter (6) is connected to the input end of the signal processing unit (7), the output end of the signal processing unit (7) is connected to the input end of the display unit (8), and the magnetic induction element (2) and the magnetic induction sensor (3) are arranged inside the magnetic shielding element (4).

2. The induction cooker with temperature detection according to claim 1, characterized in that: The magnetic induction element (2) is arranged below the induction coil, and the magnetic induction element (2) produces a magnetic change when the temperature changes, thereby generating a magnetic signal.

3. The induction cooker with temperature detection according to claim 2, characterized in that: The magnetic induction element (2) is designed using ferrite.

4. The induction cooker with temperature detection according to claim 1, characterized in that: The magnetic induction sensor (3) is used to measure the magnetic signal generated by the magnetic induction element (2) and convert the magnetic signal into an electrical signal.

5. The induction cooker with temperature detection according to claim 1, characterized in that: The magnetic shielding element (4) is used to shield the influence of the magnetic field generated by the induction cooker on the magnetic induction sensor. The magnetic shielding element (4) is made of magnetic material, and the magnetic material includes a high-permeability magnetic alloy.

6. The induction cooker with temperature detection according to claim 1, characterized in that: The amplifier (5) is an instrument amplifier, and the instrument amplifier is used to amplify electrical signals.

7. The induction cooker with temperature detection according to claim 1, characterized in that: The filter (6) is a low-pass filter, which is used to allow low-frequency signals to pass through and block high-frequency signals.

8. The induction cooker with temperature detection according to claim 1, characterized in that: The signal processing unit (7) is a digital signal processor, which is used to convert the electrical signal into a digital signal and obtain the current temperature value according to the digital signal.

9. The induction cooker with temperature detection according to claim 8, characterized in that: The display unit (8) is a digital display, and the display unit (8) is used to display the current temperature value.

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