Temperature measuring device for induction cooker

Abstract

The utility model discloses a temperature measuring device for an induction cooker, and the device comprises a housing, a thermocouple probe, a Faraday shielding cover, a control circuit board, a battery, a display screen, a switch, an alarm, an indicating lamp, a Type-C interface, and an elastic buckle clamp. The accuracy and the sensitivity of temperature measurement are improved; secondly, the Faraday shielding cover is combined with the dynamic magnetic field offset circuit, so that electromagnetic interference is effectively shielded and offset, and the stability and reliability of signals are ensured; through the improvement, the device can stably operate in a high-temperature and high-intensity magnetic field environment.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils technology, specifically a temperature measuring device for an induction cooker. Background Technology

[0002] With the widespread use of induction cookers, accurate temperature measurement has become a key requirement for improving cooking results and equipment safety. However, the high-temperature environment and strong magnetic field interference generated by induction cookers pose a severe challenge to the performance of traditional temperature measuring devices. Traditional temperature measurement methods (such as infrared temperature measurement and ordinary thermocouples) often suffer from insufficient measurement accuracy and signal distortion under high temperatures and strong electromagnetic interference, making it difficult to meet the needs of modern intelligent cooking equipment. In addition, heat accumulation and poor heat dissipation inside the induction cooker may also shorten the lifespan of the temperature measuring device, further limiting its application range. Therefore, developing a temperature measuring device that can operate stably in high-temperature and strong magnetic field environments has become an important direction for solving this technical bottleneck. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a temperature measuring device for induction cookers that can operate stably in high-temperature and strong magnetic field environments, comprising:

[0004] A shell, which has a cavity inside;

[0005] The thermocouple probe is fitted into the front end of the housing. The thermocouple probe includes a sheath and a thermocouple wire. The thermocouple wire is wrapped in the sheath. A thermally conductive metal block is provided at the tip of the thermocouple probe. The surface of the thermally conductive metal block is plated with gold or silver. A MEMS thermopile sensor is embedded at one end of the thermocouple probe near the housing.

[0006] The control circuit board is located inside the Faraday shield of the cavity. The surface of the Faraday shield is designed with corrugated heat dissipation fins. The control circuit board is equipped with a central control processor, a Bluetooth controller and a Hall sensor. The central control processor, Bluetooth controller and Hall sensor are electrically connected. The control circuit board also integrates a dynamic magnetic field cancellation circuit, which generates a reverse magnetic field based on the detection signal of the Hall sensor.

[0007] The battery box is located inside the cavity at the bottom of the control circuit board. A ceramic heat insulation sheet is provided between the battery box and the control circuit board. The battery box contains a battery, which is electrically connected to the control circuit board.

[0008] Preferably, the dynamic magnetic field cancellation circuit includes a multi-stage reverse coil array, the layout of which is orthogonal to the detection direction of the Hall sensor.

[0009] Preferably, the control circuit board is made of an aluminum nitride ceramic substrate.

[0010] Preferably, the shell has a double-layer hollow structure, is made of polyimide material, and has an embedded ceramic fiber heat insulation layer.

[0011] Preferably, the sheath is made of 316 stainless steel.

[0012] Preferably, the Faraday shield is made of silver-plated copper foil or tin-plated copper foil.

[0013] Preferably, the housing also has a display screen embedded in it, which is electrically connected to the controller, and a silicone sealing ring is provided between the display screen and the housing.

[0014] Preferably, the housing is equipped with a switch, an alarm, and an indicator light, all of which are electrically connected to the control circuit board.

[0015] Preferably, the bottom of the housing is provided with a Type-C interface that is electrically connected to the control circuit board, and a silicone sealing ring is provided between the housing and the Type-C interface.

[0016] Preferably, the outer side of the housing is provided with an elastic clip, which is connected to the housing via a torsion spring.

[0017] The beneficial effects are as follows: First, by incorporating a gold- or silver-plated heat-conducting metal block and a MEMS thermopile sensor, the accuracy and sensitivity of temperature measurement are improved. Second, by using a Faraday shield combined with a dynamic magnetic field cancellation circuit, electromagnetic interference is effectively shielded and canceled, ensuring signal stability and reliability. Furthermore, the integration of a Bluetooth controller and a central control processor further enhances the device's intelligence level, enabling real-time temperature data transmission and remote monitoring. This design not only meets the high-precision temperature measurement requirements of induction cookers but also provides reliable technical support for smart kitchen appliances, demonstrating significant market application value. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the device;

[0020] Figure 2 This is a schematic cross-sectional view of the device;

[0021] In the picture:

[0022] 1. Housing; 11. Elastic clip; 12. Torsion spring; 13. Switch; 14. Alarm; 15. Indicator light;

[0023] 2. Thermocouple probe;

[0024] 3. Control circuit board;

[0025] 4. Display screen;

[0026] 5. Battery box;

[0027] 6. Type-C interface. Detailed Implementation

[0028] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0029] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Example

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall structure of the device. Figure 2This is a cross-sectional schematic diagram of the device. This embodiment provides a temperature measuring device for an induction cooker that can operate stably in high-temperature and strong magnetic field environments. The device includes a housing, thermocouple probes, a Faraday shield, a control circuit board, a battery, a display screen, a switch, an alarm, an indicator light, a Type-C interface, and a flexible clip. The thermocouple probes, battery, display screen, switch, alarm, indicator light, and Type-C interface are all electrically connected to the control circuit board. The battery provides power to the entire device and is housed in a battery compartment.

[0033] See also Figure 2 The shell has a double-layer hollow structure made of polyimide material with an embedded ceramic fiber insulation layer; the shell has a cavity; the thermocouple probe is fitted at the front end of the shell. The thermocouple probe includes a sheath and a thermocouple wire. The sheath is made of 316 stainless steel, and the thermocouple wire is wrapped in the 316 stainless steel sheath. The tip of the thermocouple probe has a thermally conductive metal block to improve the temperature measurement response speed. The surface of the thermally conductive metal block is plated with gold or silver to avoid metal ion precipitation. A MEMS thermopile sensor is embedded at one end of the thermocouple probe near the shell to monitor the probe body temperature in real time, dynamically correct the thermocouple measurement value, and eliminate thermoelectric potential deviation caused by the magnetic field.

[0034] The control circuit board is housed within the Faraday shield of the cavity. The circuit board is made of aluminum nitride ceramic substrate, which offers high-temperature resistance and rapid heat dissipation. The Faraday shield is made of silver-plated or tin-plated copper foil to block magnetic field interference from the induction cooker. The control circuit board houses a central control processor, a Bluetooth controller, and a Hall sensor, all electrically connected. The Bluetooth controller contains a Bluetooth connector and a Bluetooth repeater. The central control processor incorporates an adaptive filtering algorithm, dynamically adjusting the thermocouple probe output signal based on the temperature difference between the MEMS thermopile sensor and the thermocouple wire. The control circuit board also integrates a voltage regulator circuit, a Bluetooth driver circuit, and a dynamic magnetic field cancellation circuit. The dynamic magnetic field cancellation circuit includes a multi-stage reverse coil array, its layout aligned with the Hall sensor... The detection directions are orthogonal, and a local zero magnetic flux environment is achieved through gradient magnetic field compensation. The dynamic magnetic field cancellation circuit only activates the multi-stage reverse coil array when the Hall sensor detects a magnetic field strength exceeding 50μT. The dynamic magnetic field cancellation circuit generates a reverse magnetic field based on the detection signal of the Hall sensor to cancel external magnetic field interference. The Hall sensor is used to detect the ambient magnetic field strength in real time, eliminating the interference of the magnetic field on the temperature reading, which can improve the reading accuracy to ±0.2℃. The space between the shell and the Faraday shield is filled with a boron nitride-paraffin composite phase change material layer doped with carbon nanotubes. The boron nitride-paraffin composite phase change material layer doped with carbon nanotubes can quickly absorb and store heat while quickly conducting the heat out, reducing the internal temperature of the shell. The surface of the Faraday shield is designed with corrugated heat dissipation fins, which can increase the contact area with the phase change material and improve the heat conduction efficiency.

[0035] The battery compartment is located inside the cavity, at the bottom of the control circuit board. A ceramic heat insulation sheet is placed between the battery compartment and the control circuit board. A temperature sensor is installed on the battery compartment. When the temperature exceeds a threshold, the central control processor cuts off the circuit and triggers an alarm. The display screen is embedded in the housing, and the Type-C interface is located at the bottom of the housing. Silicone sealing rings are placed between the display screen and the housing, and between the Type-C interface and the housing, to prevent moisture and dust from entering the housing. An elastic clip is located on the outside of the housing, connected to the housing via a torsion spring. The elastic clip and the torsion spring work together to securely clamp the device to the edge of the cookware, accommodating cookware of different thicknesses.

[0036] In use, this device pairs with an induction cooker via Bluetooth and is secured to the edge of the cookware using a flexible clip. The tip of the thermocouple probe is inserted into the food. The thermocouple probe collects the food temperature in real time and converts the temperature signal into an electrical signal, which is transmitted to the central control processor. The central control processor performs data processing and compensation calculations. The temperature data is transmitted to the induction cooker via Bluetooth, and the induction cooker automatically adjusts the heating power based on the received temperature data. When the food temperature reaches a preset threshold, the device triggers an alarm to remind the user to adjust the cooking status.

[0037] Compared to existing temperature measuring devices for induction cookers, this device improves the accuracy and sensitivity of temperature measurement by incorporating gold- or silver-plated heat-conducting metal blocks and a MEMS thermopile sensor. Secondly, a Faraday shield combined with a dynamic magnetic field cancellation circuit effectively shields and cancels electromagnetic interference, ensuring signal stability and reliability. Furthermore, a boron nitride-paraffin composite phase change material layer doped with carbon nanotubes not only enhances heat dissipation but also enables efficient thermal management, extending the device's lifespan. The integration of a Bluetooth controller and a central control processor further enhances the device's intelligence, enabling real-time temperature data transmission and remote monitoring. This design not only meets the high-precision requirements of induction cooker temperature measurement but also provides reliable technical support for smart kitchen appliances, demonstrating significant market application value.

[0038] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A temperature measuring device for an induction cooker, characterized in that, include: A shell, which has a cavity inside; A thermocouple probe is fitted into the front end of the housing. The thermocouple probe includes a sheath and a thermocouple wire. The thermocouple wire is wrapped in the sheath. A thermally conductive metal block is provided at the tip of the thermocouple probe. The surface of the thermally conductive metal block is plated with gold or silver. A MEMS thermopile sensor is embedded at one end of the thermocouple probe near the housing. A control circuit board is located inside the Faraday shield of the cavity. The surface of the Faraday shield is designed with corrugated heat dissipation fins. The control circuit board is equipped with a central control processor, a Bluetooth controller and a Hall sensor. The central control processor, Bluetooth controller and Hall sensor are electrically connected. The control circuit board also integrates a dynamic magnetic field cancellation circuit, which generates a reverse magnetic field based on the detection signal of the Hall sensor. A battery box is disposed inside the cavity and located at the bottom of the control circuit board. A ceramic heat insulation sheet is provided between the battery box and the control circuit board. The battery box contains a battery, and the battery is electrically connected to the control circuit board.

2. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The dynamic magnetic field cancellation circuit includes a multi-stage reverse coil array, the layout of which is orthogonal to the detection direction of the Hall sensor.

3. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The control circuit board is fabricated using an aluminum nitride ceramic substrate.

4. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The shell is a double-layer hollow structure made of polyimide material, with an embedded ceramic fiber heat insulation layer.

5. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The sheath is made of 316 stainless steel.

6. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The Faraday shield is made of silver-plated copper foil or tin-plated copper foil.

7. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The housing is also fitted with a display screen, which is electrically connected to the controller. A silicone sealing ring is provided between the display screen and the housing.

8. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The housing is equipped with a switch, an alarm, and an indicator light, all of which are electrically connected to the control circuit board.

9. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The bottom of the housing is provided with a Type-C interface that is electrically connected to the control circuit board, and a silicone sealing ring is provided between the housing and the Type-C interface.

10. The temperature measuring device for an induction cooker according to claim 1, characterized in that, The outer side of the housing is provided with an elastic buckle, which is connected to the housing via a torsion spring.

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