A multi-temperature measuring cooking device

Abstract

The application discloses a multi-temperature measuring cooking device, and relates to the technical field of household appliances. The multi-temperature measuring cooking device comprises a container and a base, and the container and the base are arranged in an upper-lower split mode. The base comprises an electric heating disc and a control panel, and a center hole is formed in the center area of the electric heating disc. A temperature measuring piece one is arranged on the center hole and abuts against the bottom of the container. An atmosphere temperature measuring hole is further arranged through the disc body of the electric heating disc. An atmosphere sensor is arranged in the atmosphere temperature measuring hole and used for detecting the temperature of the atmosphere temperature measuring hole. The electric heating disc, the temperature measuring piece one and the atmosphere sensor are electrically connected with the control panel. The temperature of the electric heating disc is indirectly detected by measuring the space temperature through the atmosphere sensor, so that the temperature detection precision is high, and the use is safe.

Description

Technical Field

[0001] This utility model relates to the field of intelligent cooking equipment, and in particular to a high-precision temperature control cooking device that adopts a split structure and multiple temperature measuring points working together. Background Technology

[0002] Split-type electric cooking appliances typically consist of a lower heating base and an upper container. To achieve temperature control, most products on the market rely on detecting the container's temperature. A common practice is to place a high-temperature thermistor in the center of the lower heating base. This thermistor is mounted using a temperature-conducting element, which is directly or indirectly attached to the appliance via an elastic element or other device (such as a temperature control base). Temperature is detected by the elastic contact between the temperature-conducting element and the bottom of the container.

[0003] However, the outer periphery of the container directly exchanges heat with the environment, and the closer to the center, the less influence the external environment has on the temperature. Especially for containers with larger diameters, monitoring the temperature only at the central point can lead to low temperature detection accuracy, easily causing functional control problems such as insufficient boiling or over-boiling, affecting cooking results and equipment performance.

[0004] Chinese patent document CN115942527A discloses a cooking appliance and its control method. The cooking appliance includes a container and a body. The container is a concave vessel placed on a heating plate to hold food for cooking. The body includes a shell, a power cord, a control board including a PCB board and hardware / software systems, a heating plate electrically connected to the control board by wires, a container temperature sensor that contacts the container, and a heating plate temperature sensor that contacts the heating plate. Regarding the content disclosed in this document, we understand that the container temperature sensor is a conventional temperature measurement method in the industry. The improvement is to add a temperature measuring point on the heating plate to achieve multi-point monitoring. While this technology solves the problem of generally low temperature measurement accuracy, for the heating plate, different selection of temperature measuring points can lead to large temperature differences. Significant temperature differences exist between the upper and lower surfaces, as well as the sides or different locations on the surface of the heating plate, resulting in low temperature measurement accuracy. Even with temperature compensation, the practical significance of accurate temperature measurement is lost.

[0005] Traditional glass rice cookers suffer from poor thermal conductivity, resulting in low temperature control accuracy and uneven heating. Current technologies primarily rely on a single bottom-contact temperature sensor, which cannot detect the distribution of temperature readings, easily leading to localized overheating and scorching. Some solutions attempt to add more temperature sensing points, but these do not address the heat transfer lag issue inherent in split-type structures and lack dynamic power protection mechanisms specifically for glass materials. Utility Model Content

[0006] In view of this, this application provides a high-precision multi-temperature measuring cooking device and its control method to solve the problems of low accuracy of multi-point temperature measurement of containers and uneven heating in the prior art, thereby improving the cooking effect and the safety performance of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A multi-temperature measuring cooking device includes a container and a body, which are separately arranged vertically. The body includes a heating plate and a control board. A central hole is formed in the central area of ​​the heating plate. A temperature measuring element is installed on the central hole and abuts against the bottom of the container. An atmospheric temperature measuring hole is also provided through the heating plate. A second temperature measuring element is installed in the atmospheric temperature measuring hole for detecting the temperature in the atmospheric temperature measuring hole. The heating plate, the first temperature measuring element, and the second temperature measuring element are electrically connected to the control board. A fan is located below the central hole of the heating plate.

[0008] Furthermore, the channel between the container and the cookware body, as well as the fan, work together to form a hot air channel when the cooking equipment is working, allowing the bottom of the container to pass through a uniform heat source.

[0009] Furthermore, the channel mainly consists of two parts: a) the gap between the central hole on the heating plate and the temperature measuring element; b) the crisscrossing gaps formed between the convex or concave surfaces on the heating plate.

[0010] Furthermore, the fan blades are equipped with air pressure balancing holes.

[0011] Furthermore, the number of ambient temperature measuring holes is ≥1, distributed in an annular zone with a radius of 30%–70% from the center of the heating plate.

[0012] Furthermore, the ambient temperature measuring holes located in the annular zone are arranged in a circular array, and the included angle α between the centers of adjacent holes satisfies 45°≤α≤120°.

[0013] Furthermore, the second temperature measuring element is an infrared thermopile sensor with a wavelength response range of 8–14 μm.

[0014] Furthermore, there is one central hole and four ambient temperature measuring holes.

[0015] The device structure disclosed in this utility model is the technical basis of the temperature control method. Temperature measuring element one directly contacts the container to ensure the real-time over-temperature protection of the heating plate. At the same time, temperature measuring element two uses infrared temperature measurement to solve the problem of unstable local measurement of the heating plate. The fan and channel design ensure the stability of the temperature difference protection mechanism.

[0016] In addition, this application also provides a temperature control method based on the above-mentioned cooking equipment, including the following core control mechanism: (a) Based on the detection data of the first and second temperature measuring elements, the heating power is dynamically adjusted to keep the temperature of the heating plate balanced near the target value. Temperature control by on / off ratio is prohibited. (b) When the temperature detected by the second temperature measuring element is ≥380℃, cut off the power to 0W, and restore it after the temperature is ≤350℃ to prevent overheating; (c) When the temperature difference between temperature measuring element one and temperature measuring element two is ≥280℃, switch to 400W constant power until the temperature difference is ≤280℃ to avoid local overheating; (d) When the temperature measuring element 2 detects that the atmospheric sensor value is ≥ (Y+10)℃ (Y is the actual measured value of water boiling), the power is cut off for 5 minutes and a buzzer countdown is triggered to ensure safe use.

[0017] As can be seen from the above technical solution, the advantages of this utility model are: 1. Improve temperature control accuracy by enhancing temperature measurement accuracy: By employing a multi-point temperature detection method that combines central and non-central sensors, the current temperature of the container can be monitored more accurately, thereby better controlling the working status of the heating plate and improving cooking results.

[0018] 2. Uniform heating: The use of a fan allows the hot air between the bottom of the container and the heating plate to be distributed quickly and evenly, thus homogenizing the heat and preventing localized heating, thereby extending the service life of the container.

[0019] 3. Multiple protections: The equipment is equipped with multiple protection mechanisms, including over-temperature fuse protection, temperature difference protection, and scorch protection, to ensure safety and reliability. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] Figure 1 This is a schematic diagram of the overall structure of this application.

[0022] Figure 2 This is a schematic diagram of the exploded structure of this application.

[0023] Figure 3 This is a schematic diagram of the first structure of the electric heating plate of this application.

[0024] Figure 4 For the purposes of this application Figure 3 A top view of the heating plate in the diagram.

[0025] Figure 5 This is a schematic diagram of a second structure of the electric heating plate of this application.

[0026] Figure 6 For the purposes of this application Figure 5 A top view of the heating plate in the diagram.

[0027] Figure 7 This is a schematic diagram of the third structure of the electric heating plate of this application.

[0028] Figure 8 For the purposes of this application Figure 7 A top view of the heating plate in the diagram.

[0029] Figure 9 This is a schematic diagram of the fourth structure of the electric heating plate of this application.

[0030] Figure 10 For use in this application Figure 9 A schematic diagram of the overall structure of the Zhongdian heating plate.

[0031] Figure 11 For this application Figure 9 A schematic diagram of the surface structure of the electric heating plate.

[0032] Explanation of reference numerals in the attached diagram: 100-Heating plate; 1-First temperature sensing layer; 2-First thermistor; 3-Temperature measuring hole; 4-Second temperature sensing layer; 5-Second thermistor; 6-Thermistor connecting rod; 7-First spring; 8-Heat-conducting layer; 9-Upper insulation layer; 10-Heating wire fixing ring; 11-Middle insulation layer; 12-Tray; 13-Middle insulation layer; 14-Displacement device fixing plate; 15-Displacement device connecting rod; 16-Second spring; 17-Lower insulation layer; 18-Upper elastic pressure plate; 19-Displacement device spring; 20-Lower elastic pressure plate; 200-Temperature measuring element two; 300-Fan; 100-Container. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0034] Example 1 refer to Figures 1 to 9 ,like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment provides a multi-temperature measuring cooking device, including a container 100 and a vessel body 200, which are arranged as upper and lower parts. The vessel body 200 includes a heating plate 210 and a control board 220. A central hole 211 is opened in the central area of ​​the heating plate 210. A temperature measuring element 230 is provided on the central hole 211, and the temperature measuring element 230 abuts against the bottom of the container 100. The heating plate 210 also has a through-hole ambient temperature measuring hole 212. A temperature measuring element 240 is installed in the ambient temperature measuring hole 212 for detecting the temperature inside the ambient temperature measuring hole 212. Compared with the contact measurement in the prior art, ambient (space) measurement is equivalent to measuring the average stability in a local area, and will not affect the measurement result due to poor contact. The heating plate 210, the temperature measuring element 230 and the temperature measuring element 240 are electrically connected to the control board 220.

[0035] In this application, the specific structure of the electric heating plate 210 is as follows: the plate body of the electric heating plate 210 includes a heat-conducting layer 8, an upper heat insulation layer 9, a heating wire fixing ring 10, a middle heat insulation layer 11, a tray 12, a middle second heat insulation layer 13, and a lower heat insulation layer 17 stacked sequentially from top to bottom. The outer peripheral surface of the heating wire fixing ring 10 has a serrated cut. The heating strip is fixed and wrapped around the heating wire fixing ring 10 using the serrated cut. The heat-conducting layer 8 has a cylindrical column extending downward and inserted into the central hole 211 / atmosphere temperature measuring hole 212. The upper heat insulation layer 9 and the heating wire... The fixing ring 10, the middle insulation layer 11, and the tray 12 are all fitted onto the cylindrical column. The tray 12 and the middle insulation layer 13 are connected in a gap-like manner by multiple pads. The middle insulation layer 13 and the lower insulation layer 17 are fitted together, and the lower insulation layer 17 is provided with a sleeve that extends upward and is inserted into the central hole 211 / atmosphere temperature measuring hole 212. The cylindrical column and the sleeve improve the smoothness of the inner wall of the central hole 211 / atmosphere temperature measuring hole 212 in order to reduce the damage caused by friction between the central hole 211 / atmosphere temperature measuring hole 212 and the second temperature measuring element 240.

[0036] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, the number of atmospheric temperature sensing holes 212 is ≥1, distributed in an annular zone of the heating plate 210 with a radius of 30%–70% from the center. This, in conjunction with temperature sensing element 230, enables multi-area temperature measurement. Simultaneous multi-area measurement avoids the influence of the external environment on the temperature detection of temperature sensing element 240 when the atmospheric temperature sensing holes 212 are too close to the edge. Multi-area measurement allows for monitoring of whether localized overheating of the container 100 occurs, improving the safety of the equipment.

[0037] In this embodiment, preferably, the ambient temperature measuring holes 212 located in the annular zone are arranged in a circular array, and the included angle α between the centers of adjacent holes satisfies 45°≤α≤120°. The uniform distribution allows for more accurate measurement results and avoids mutual interference caused by two adjacent temperature measuring elements 240 being too close together, which would affect the reliability of use.

[0038] In this embodiment, the first optimal distribution of the central hole 211 and the atmosphere temperature measuring hole 212 is as follows: the number of central holes 211 is 1, and the number of atmosphere temperature measuring holes 212 is 4.

[0039] In this embodiment, the second optimal distribution of the central hole 211 and the atmosphere temperature measuring hole 212 is as follows: the number of central holes 211 is two that are offset by 180 degrees in the circumferential direction and have a 5mm gap between their edges, and the number of atmosphere temperature measuring holes 212 is six.

[0040] In this application, the inner walls of the central hole 211 and the ambient temperature measuring hole 212 are coated with a metallic reflective coating with a reflectivity of ≥95%, which reduces the impact of heat loss on temperature measurement.

[0041] In this application, the second temperature measuring element 240 is preferably an infrared thermopile sensor with a wavelength response range of 8–14 μm, which improves the accuracy and sensitivity of temperature measurement. The infrared thermopile sensor is a common product on the market. Under the action of the elastic support, the second temperature measuring element 240 will automatically descend when it is pressed down by the container 100. After the container 100 is removed, it can automatically rise under the action of the elastic support.

[0042] In this application, the structure of the temperature measuring element 230 installed in the central hole 21 is as follows: The temperature measuring element 230 includes a first thermistor 2 and a thermal floating frame for fixing the first thermistor 2. The thermal floating frame includes a first temperature sensing layer 1 and a displacement fixing plate 14 fastened together. The displacement fixing plate 14 passes through the central hole 211 and can contact the container 100. The displacement fixing plate 14 is provided with a displacement connecting rod 15 for mounting the first thermistor 2 so that the sensing end of the first thermistor 2 is located in the cavity between the first temperature sensing layer 1 and the displacement fixing plate 14. A second spring 16 is provided between the bottom of the displacement fixing plate 14 and the lower heat insulation layer 17 and is fitted on the corresponding sleeve. Under the action of the second spring 16, the thermal floating frame moves upward and presses against the lower edge of the corresponding cylinder or the tray 12, so that the thermal floating frame can float elastically, thereby driving the first thermistor 2 to float elastically, so that the temperature measuring element 230 can better contact the bottom of the container 100 and improve the temperature measurement accuracy.

[0043] The bottom of the lower insulation layer 17 is fixedly connected to an upper elastic pressure plate 18, and a lower elastic pressure plate 20 is fixedly connected to the upper elastic pressure plate 18. A displacement spring 19 is sandwiched between the upper elastic pressure plate 18 and the lower elastic pressure plate 20. During the descent of the displacement connecting rod 15, it can resist the displacement spring 19, which plays a role in buffering and stabilizing.

[0044] In this application, another structure of the second temperature measuring element 240 installed in the atmosphere temperature measuring hole 212 is as follows: the second temperature measuring element 240 includes a thermistor connecting rod 6, a second thermistor 5 fixedly installed on the thermistor connecting rod 6, and a second temperature sensing layer 4 covering the second thermistor 5. The thermistor connecting rod 6 is slidably installed in the corresponding atmosphere temperature measuring hole 212, and the thermistor connecting rod 6 is provided with a shoulder that can abut against the lower surface of the tray 12. The two ends of the first spring 7 sleeved on the thermistor connecting rod 6 abut against the shoulder of the thermistor connecting rod 6 and the lower heat insulation layer 17. The thermistor linkage 6 can float elastically, and by pressing the second temperature sensing layer 4, the second thermistor 5 has a certain downward movement space, so that the temperature measuring element 240 can better contact the bottom of the container 100. The setting of the second temperature sensing layer 4 makes the second thermistor 5 and the container 100 non-contact measurement. The temperature is measured by measuring the space temperature using the second thermistor 5. Since the heat distribution in the space is more uniform, the space temperature measurement is equivalent to the average temperature of several points compared to point contact measurement, making the temperature measurement more reliable.

[0045] In this application, one material usage scheme for the heating plate 210 is as follows: all components of the heating plate 210 except for the upper heat insulation layer 9, the middle heat insulation layer 11, and the middle second heat insulation layer 13 are made of high-temperature resistant aluminum alloy. The thickness of the heating plate 210 is 5mm. The upper surface of the heating plate 210 is in the shape of a grid or concentric circles, that is, the upper surface of the heat conduction layer 8 is in the shape of a grid or concentric circles, which enhances the heat conduction effect.

[0046] In this application, another material option for the heating plate 210 is as follows: all components of the heating plate 210 except for the upper insulation layer 9, the middle insulation layer 11, and the middle insulation layer 13 are made of stainless steel, and the thickness of the heating plate 210 is 6mm, which improves the durability of the heating plate.

[0047] In this application, the upper insulation layer 9, the middle insulation layer 11 and the middle insulation layer 13 are all mica sheets, which have good heat insulation performance. The lower insulation layer 17 is made of metal, which has a certain strength and provides stable support for the electric heating plate 210.

[0048] Example 2 Based on Embodiments 1 and 2, in order to make the heat distribution between the bottom of the container 100 and the heating plate 210 more uniform, such as Figure 9 , Figure 10 and Figure 11 As shown, the cooking device also includes a fan 250, which is located at the lower end of the central hole 211 of the heating plate 210, the channel 213 between the container 100 and the container body 200, and the fan 250. When the cooking device is working, all components work together to form a hot air channel H300. During operation, the air generated by the fan 250 flows along the hot air channel H300 to form a dynamic airflow. The airflow drives the hot air located between the bottom of the container 100 and the heating plate 210, so that the hot air is quickly and evenly distributed. This ensures that the bottom of the container 100 is heated evenly by a uniform heat source, preventing localized heating that could affect the lifespan of the container.

[0049] In this application, channel 213 mainly consists of two parts: a) the gap between the central hole 211 on the heating plate 210 and the temperature measuring element 230; b) the crisscrossing gaps formed between the protrusions or concave surfaces on the surface of the heating plate 210. After the container 100 is placed on the heating plate 210, the top of the crisscrossing gaps formed between the protrusions or concave surfaces is blocked by the container 100, forming a diffusion channel that allows the airflow to diffuse radially. During operation, the air generated by the fan 250 moves upward along the central hole 211. After encountering the bottom surface of the container 100, the airflow is guided and redirected, causing the airflow to enter the diffusion channel between the bottom of the container 100 and the heating plate 210 and disperse.

[0050] To reduce the operating resistance of fan 250, the blades of fan 250 are equipped with air pressure balance holes to ensure stable fan operation and improve heat homogenization. If the airflow velocity is ≥1.2m / s, the temperature uniformity at the bottom of the container is improved to ΔT≤15℃.

[0051] Specifically, during operation, the blades of fan 250 are subject to various obstacles, leading to increased operating drag. Among these, the airflow pattern on the blade surface is a key factor. When fan 250 rotates, the leading edge of the blades first contacts the airflow, forming a boundary layer on the blade surface. As the airflow flows backward along the blade surface, the velocity and pressure distribution within the boundary layer change due to variations in blade shape and angle. In certain areas of the blade, particularly near the trailing edge on the back side, airflow separation easily occurs. This separation creates vortex regions on the back side of the blade, generating reverse pressure that hinders normal blade rotation, thus increasing the fan's operating drag. This drag not only consumes more energy, increasing power consumption, but also causes unstable fan speed, affecting overall performance. By incorporating pressure balancing holes, the high-pressure airflow on the front side of the blades can flow to the low-pressure area on the back side when fan 250 rotates. This airflow adjustment regulates the pressure distribution on the blade surface, increasing the pressure on the back side and reducing the pressure difference between the front and back sides. When the pressure difference decreases, the airflow pattern on the blade surface improves. The airflow is less prone to separation and can adhere more tightly to the blade surface, reducing the formation of eddies. Without the obstruction of a large number of eddies, the resistance experienced by the fan blades during rotation is significantly reduced, improving the operational stability of the fan 250 and thus improving the stability of the airflow delivered by the fan 250, resulting in good continuity of hot air flow between the bottom of the container 100 and the heating plate.

[0052] By increasing the fan speed of 250, the bottom of container 100 and the upper surface of heating plate 210 can be cooled simultaneously, achieving rapid cooling and improving safety during use.

[0053] During installation, fan 250 is connected to drive mechanism via transmission mechanism.

[0054] Example 3 To further illustrate the purpose of this invention, the following detailed description is provided in conjunction with the embodiments and accompanying drawings.

[0055] The illustrative embodiments and descriptions herein are used to explain this application and do not constitute a limitation thereof.

[0056] This embodiment provides a high-precision multi-temperature measuring cooking device, including a glass container 100 and a container body 200. Both are designed as separate upper and lower parts for easy cleaning and maintenance. The core components of the container body 200 include: The heating plate 210 uses a nickel-chromium alloy resistance heating plate with a power of 1500W and a central hole 211 with a diameter of 15mm. The plate surface has radial concave channels, 1mm wide and 1.5mm deep, extending from the central hole to the edge.

[0057] Temperature sensing element 230 is a PT1000 platinum resistance temperature sensor, which is tightly abutted against the center of the bottom of the glass container 100 through a spring loading mechanism to detect the container temperature in real time.

[0058] Temperature sensing element 240: 4 infrared thermopile sensors with a response wavelength of 8–14 μm, mounted on a circumference 40 mm from the center hole, occupying 60% of the radius, and distributed at 90° intervals.

[0059] Fan 250 is a centrifugal fan with a speed of 2000 rpm. It is located below the center hole 211, and the blades have 6 Φ2mm air pressure balance holes.

[0060] The control board 220 integrates an STM32F4 main control chip to process data from temperature measuring element 1 230 and temperature measuring element 2 240 in real time.

[0061] Collaborative working mechanism: Fan 250 drives airflow (cold air) through the central hole 211 or the gap between the central hole and the first temperature sensing layer 1 (temperature measuring element 1 230) → the diffusion channel formed between the concave channel and the bottom of the container, forming a hot air channel H300 (stable and uniform hot air) (temperature measuring element 240). Figure 3 (As indicated by the arrow). This structure achieves: uniform airflow heating to keep the temperature difference at the bottom of the container ≤15℃ (compared to ≥50℃ in traditional structures); temperature measuring element 230 and temperature measuring element 240 work together to detect the temperature of the heating plate, avoiding measurement delays caused by glass insulation.

[0062] Example 4 Assemble the equipment: Install the heating plate 210 onto the base of the container body 200. Install the first temperature sensor 230 into the center hole 211, ensuring it abuts against the bottom of the container 100. Install the second temperature sensor 240 into the atmosphere temperature sensing port 212. Install the fan 250 below or to the side of the center hole 211 of the heating plate 210, ensuring the blades have pressure balancing holes. Electrically connect the heating plate 210, the first temperature sensor 230, and the second temperature sensor 240 to the control board 220. Place the container 100 on the heating plate 210, ensuring the first temperature sensor 230 is in contact with the bottom of the container 100.

[0063] Start the equipment: Power on the cooking equipment to start it; control board 220 will begin operation. Temperature detection and control: Temperature sensors 230 and 240 continuously monitor the temperature related to container 100. Control board 220 dynamically adjusts the heating power based on the detected data to keep the heating plate temperature balanced near the target value; on / off temperature control is prohibited. When temperature sensor 240 detects a temperature ≥380℃, the power is cut off to 0W and restored when the temperature ≤350℃ to prevent overheating. When the temperature difference between temperature sensors 230 and 240 is ≥280℃, the power is switched to a constant 400W until the temperature difference ≤280℃ to avoid localized overheating. When temperature sensor 240 detects a value ≥(Y+10)℃ (Y is the measured value of water boiling), the power is cut off for 5 minutes and a countdown timer is triggered to ensure safe use.

[0064] Hot air channel operation: When fan 250 runs, the generated air moves upward along the temperature measuring hole 3 in the central area. After the airflow encounters the bottom surface of container 400, it is guided and turned, so that the airflow enters the space between the bottom of container 400 and heating plate 100, driving the flow of hot air and making the bottom of container 400 evenly heated.

[0065] Temperature control methods Dynamic adjustment of heating power: Based on the detection data of temperature measuring element 1 230 and temperature measuring element 240, the control board 220 dynamically adjusts the heating power to keep the temperature of the heating plate near the target value. Temperature control by on / off ratio is prohibited.

[0066] To prevent overheating: When the temperature detected by temperature sensor 240 is ≥380℃, the power is cut off to 0W. Heating is resumed when the temperature is ≤350℃ to prevent overheating.

[0067] To avoid local overheating: When the temperature difference between temperature measuring element 1 230 and temperature measuring element 2 240 is ≥280℃, switch to 400W constant power until the temperature difference is ≤280℃ to avoid local overheating.

[0068] Safe use: When the temperature measuring element 240 detects that the atmospheric sensor value is ≥ (Y+10)℃ (Y is the actual measured value when the water boils), the power will be cut off for 5 minutes and a buzzer countdown will be triggered to ensure safe use.

[0069] The above method provides the following specific applications: 1. Rice cooking function: (D is the real-time temperature detected by temperature sensor 2; R is the real-time temperature detected by temperature sensor 1) First stage (0-1min): Heating plate at 1500W heats to D≥100℃ and R≥50℃; Second stage (2-4 min): Balance D to 250℃ at 600W; Third stage (5-10 min): Balance D to 200℃ with 300W, and record the detection value M of temperature measuring element two; Fourth stage (11-18 min): Equilibrium at 200 W to 170℃; Fifth stage (19min - water boils): Activate on / off ratio temperature control, maintain D350℃ at 1500W; Sixth stage (water boils 0-3 min): 900W balance D to 350℃; Seventh stage (4-10 min): Equilibrium at 300W to 200℃; Eighth stage (11-15 min): 0W power; Ninth stage (16-24 min): Equilibrium D to 160℃ at 200W; Stage 10 (25-28 min): 0W power and trigger the above scorch protection process.

[0070] The adaptive logic for rice quantity is as follows: for rice quantities of 0.5-10 cups, the temperature sensor detects the value N at the end of the third stage; the duration of the fourth to tenth stages is scaled and rounded according to the proportional coefficient K=M / N (rounding up when K≥0.4).

[0071] 3. Soup cooking function: Phase 1 (0 min - water boils): On / off ratio temperature control is activated, maintaining D350℃ at 1500W; Second stage (0-3 minutes after water boils): Activate on / off ratio temperature control, maintain D350℃ at 1500W; Third stage (4 min - end): 800W equilibrate to 280℃.

[0072] 4. Congee function: First stage (0-1 min): 1500W heating; Second stage (1-10min): 700W heating. If D≥150℃, turn on / off ratio temperature control (on for 15s / off for 15s). The third stage (11-25 min): 1500W heating. If D≥300℃ or R≥200℃, the on / off ratio temperature control will be activated. Fourth stage (26-35 min): 300W heating. If D≥150℃ or R≥100℃, turn on / off ratio temperature control will be activated. Fifth stage (36-50 min): 100W heating. If D≥150℃ or R≥100℃, turn on / off ratio temperature control will be activated.

[0073] Through the above description of embodiments and technical parameters, the cooking equipment and control method of this application can achieve high-precision multi-point temperature measurement and uniform heating, thereby improving the cooking effect and the safety performance of the equipment.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-temperature measuring cooking device, comprising a container (100) and a body (200), characterized in that: The container (100) and the container body (200) are set up separately, one above the other. The device (200) includes a heating plate (210) and a control board (220), and the heating plate (210) has a central hole (211) in the central area. A temperature measuring element (230) is provided on the central hole (211), and the temperature measuring element (230) abuts against the bottom of the container (100); The heating plate (210) is also provided with a through-hole atmosphere temperature measuring hole (212); a second temperature measuring element (240) is installed in the atmosphere temperature measuring hole (212) for detecting the temperature in the atmosphere temperature measuring hole (212); The heating plate (210), temperature measuring element one (230) and temperature measuring element two (240) are electrically connected to the control board (220); A fan (250) is located below the center hole (211) of the heating plate (210).

2. The multi-temperature measuring cooking device as described in claim 1, characterized in that, The channel (213) between the container (100) and the container body (200), as well as the fan (250), together form a hot air channel (H300) when the cooking device is working, so that the bottom of the container (100) is exposed to a uniform heat source.

3. The multi-temperature measuring cooking device as described in claim 2, characterized in that, The channel (213) is mainly composed of two parts: a) the gap between the central hole (211) on the heating plate (210) and the temperature measuring element (230); b) the crisscrossing gaps formed between the protrusions or concave surfaces on the surface of the heating plate (210).

4. The multi-temperature measuring cooking device as described in claim 1, characterized in that, The blades of the fan (250) are provided with air pressure balance holes.

5. The multi-temperature measuring cooking device as described in claim 1, characterized in that, The number of the ambient temperature measuring holes (212) is ≥1, and they are distributed in an annular zone of the electric heating plate (210) with a radius of 30%–70% from the center.

6. The multi-temperature measuring cooking device as described in claim 2, characterized in that, The ambient temperature measuring holes (212) located in the annular zone are arranged in a circular array, and the included angle α between the centers of adjacent holes satisfies 45°≤α≤120°.

7. The multi-temperature measuring cooking device as described in claim 1, characterized in that, The second temperature measuring element (240) is an infrared thermopile sensor with a wavelength response range of 8–14 μm.

8. The multi-temperature measuring cooking device as described in claim 2, characterized in that, The number of the central hole (211) is 1, and the number of the atmosphere temperature measuring hole (212) is 4.

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