Intelligent cooker with pot boiling over detection function

Abstract

The application relates to an intelligent cooker with a boiling-over detection function, which comprises a cooker main body, a burner opening is arranged at the top of the cooker main body, and a detection electrode is arranged outside the burner opening; a main control unit is arranged in the cooker main body and is electrically connected with the detection electrode, is used for collecting a capacitance signal of the detection electrode and judging whether boiling-over occurs; a boiling-over processing module is arranged in the cooker main body and is electrically connected with the main control unit, and comprises a gas valve control module; when the main control unit judges that boiling-over occurs, the gas valve control module controls a gas valve of the cooker to be closed. The intelligent cooker realizes real-time detection of a boiling-over phenomenon, the detection system is suitable for various pots, the intelligent cooker has the functions of intelligent prediction and active intervention, and the safety and the intelligent level of the cooker are obviously improved.

Description

Technical Field

[0001] This application relates to the field of cooktop structure technology, specifically to an intelligent cooktop with overflow detection function. Background Technology

[0002] In daily cooking, such as boiling noodles or porridge, overflowing is a common problem. This results in spilled liquid all over the countertop, creating a poor cooking experience. Currently available cooktops cannot effectively detect overflow; often, because overflow occurs so quickly during cooking, by the time the user notices, a significant amount of food has already spilled out, leaving the countertop with a lot of liquid that needs cleaning.

[0003] To address the issue of overflowing food, some existing cooktops feature dry-boil detection. These cooktops monitor the pot's temperature using a temperature probe at the bottom, determining whether the food is dry based on the temperature rise rate and a temperature threshold. However, this approach has significant drawbacks. Firstly, by the time a significant temperature change is detected, the food is usually already mostly dry. Secondly, this method is ineffective for detecting dry-boil in cooking appliances with large internal and external temperature differences, such as clay pots and earthenware pots. More importantly, these existing solutions fail to detect overflowing during cooking, thus failing to meet users' actual cooking needs. Utility Model Content

[0004] To address the problems of existing technologies, such as the inability to detect overflow in real time, severe detection lag, incompatibility with various cooking utensils, and lack of intelligent prediction and proactive intervention capabilities.

[0005] This application provides a smart cooktop with overflow detection function, including: The main body of the stove has a burner opening at the top, and a detection electrode is provided on the outside of the burner opening; The main control unit is located inside the main body of the stove and is electrically connected to the detection electrode. It is used to collect the capacitance signal of the detection electrode and determine whether overflow has occurred. An overflow handling module is installed inside the main body of the stove and electrically connected to the main control unit. It includes a gas valve control module. When the main control unit determines that an overflow has occurred, the gas valve control module controls the gas valve of the stove to close.

[0006] Furthermore, the detection electrode includes a plurality of first sampling electrodes, which are equally spaced around the burner opening and fixed to the inner surface of the glass panel of the main body of the stove.

[0007] Furthermore, the number of the first sampling electrodes is 6.

[0008] Furthermore, multiple first sampling electrodes are fixedly connected to the inner surface of the glass panel via an adhesive layer.

[0009] Furthermore, a gap is provided between the first sampling electrode and the explosion-proof mesh inside the glass panel, and the vertical distance of the gap is not less than 5mm.

[0010] Furthermore, the detection electrode includes a second sampling electrode, which is disposed on the pot body support seat outside the stove opening; The base of the pot support is provided with a flow guiding structure, which includes a flow guiding groove, and the second sampling electrode is located at the lowest point of the flow guiding groove.

[0011] Furthermore, the guide channel is an inclined annular channel with one side higher than the other, and a water collection tank is provided on the lowest side of the guide channel, and the guide channel is connected to the water collection tank.

[0012] Furthermore, the surface of the second sampling electrode is made of PP plastic or glass, and the second sampling electrode is attached and fixed to the bottom of the guide groove.

[0013] Furthermore, the main control unit includes a reference capacitor, a timer module, and a switching module; When the surface of the detection electrode is covered by liquid, causing a change in parasitic capacitance, the switching module connects the reference capacitor and the detection electrode in parallel to form an equivalent capacitor. The timer module calculates the time it takes for the equivalent capacitor to charge to the reference voltage. By comparing the change in charging time, the surface medium state of the detection electrode is determined, and thus, it is determined whether overflow has occurred.

[0014] Furthermore, the overflow handling module includes an audible and visual alarm unit, which includes a buzzer and / or an indicator light, for issuing an audible and / or visual alarm when overflow is detected.

[0015] Implementing the embodiments of this application has the following beneficial effects: This application sets a detection electrode on the outside of the burner opening and sets a main control unit and an overflow handling module electrically connected to the detection electrode inside the main body of the stove. It can collect capacitance signals in real time to determine whether an overflow phenomenon has occurred and control the gas valve to close. This realizes real-time detection of overflow phenomenon, the detection system is compatible with a variety of cookware, and has the functions of intelligent prediction and active intervention, which significantly improves the safety and intelligence level of the stove. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the module structure of an intelligent stove with overflow detection function according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the smart stove in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the sampling circuit of Embodiment 1 of this application; Figure 4 This is a circuit diagram of the air valve control module according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the smart stove in Embodiment 2 of this application; Figure 6 This is a schematic diagram of the flow guiding structure in Embodiment 2 of this application; Figure 7 This is a schematic diagram of the sampling circuit of Embodiment 2 of this application.

[0018] In the figure, the corresponding reference numerals are as follows: 10, detection electrode; 1, stove body; 12, stove head opening; 2, first sampling electrode; 3, main control unit; 31, reference capacitor; 32, timer module; 33, switch module; 4, overflow handling module; 41, gas valve control module; 42, sound and light reminder unit; 5, second sampling electrode; 6, flow guiding structure; 61, flow guiding groove; 62, water collection tank. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "upper," "lower," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or regarding the vertical, perpendicular, or gravitational direction of the component itself. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0021] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation,” “setup,” and “connection” appearing herein should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can indicate that one component is directly attached to another component or that one component is attached to another component via an intermediate component; they can refer to the internal connection of two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. A feature described in one embodiment herein may be applied alone or in combination with other features to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0022] The following combination Figure 1-7 This application introduces an intelligent cooktop with overflow detection function, based on an embodiment of the present application. Figure 1 This is a schematic diagram of the modular structure of an intelligent stove with overflow detection function.

[0023] Example 1 This application provides an embodiment of a smart stove with an overflow detection function, comprising: The main body of the stove 1 has a stove head opening 12 on its top, and a detection electrode 10 is provided on the outside of the stove head opening 12.

[0024] In this embodiment, the detection electrode 10 includes a plurality of first sampling electrodes 2, which are equally spaced around the burner opening 12 and fixed to the inner surface of the glass panel of the cooktop body 1. Specifically, the top of the cooktop body 1 is provided with a glass panel, on which the burner opening 12 is provided. The plurality of first sampling electrodes 2 are disposed on the inner surface of the glass panel outside the burner opening 12, and are equally spaced around the burner opening 12.

[0025] Furthermore, the first sampling electrode 2 is a ring-shaped sampling electrode, and multiple first sampling electrodes 2 are fixedly connected to the inner surface of the glass panel through an adhesive layer. The first sampling electrode 2 is made of metal, including but not limited to copper, stainless steel, and tin foil. The first sampling electrode 2 is bonded to the inner surface of the glass panel with conductive adhesive, and the bonding thickness is preferably 0.05-0.1 mm.

[0026] It should be noted that in this embodiment, the panel of the cooktop body 1 is made of glass. Due to the inherent electromagnetic shielding effect of metal, the metal panel will severely interfere with the capacitance signal detection of the first sampling electrode 2. However, the glass panel has excellent dielectric properties, which can ensure that the electric field generated by the first sampling electrode 2 can effectively penetrate the panel, thereby achieving accurate detection of the liquid medium around the cooktop opening 12.

[0027] Furthermore, a gap is provided between the first sampling electrode 2 and the explosion-proof mesh inside the glass panel. The vertical distance of the gap is not less than 5mm, and can be 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, preferably 5mm, to avoid the influence of the metal explosion-proof mesh on the sampling data.

[0028] In this embodiment of the application, since the overflow of the pot body may occur from any direction of 360°, the detection electrodes can be 3, 4, 5, 6, 7 or 8 first sampling electrodes 2 arranged in a ring with equal spacing.

[0029] In one possible implementation, the number of first sampling electrodes 2 is six. These six first sampling electrodes 2 are evenly spaced within the annular area surrounding the stove opening 12. This design comprehensively considers the following issues: when the number of electrodes is too small, the area of ​​a single electrode becomes too large, requiring liquid to overflow and cover more than one-third of the electrode area to trigger detection, leading to a significant decrease in sensitivity and response delay; while when the number of electrodes is too large, although detection sensitivity can be improved, the false detection rate increases due to splashing liquid during cooking. Experimental verification shows that using six first sampling electrodes 2 ensures both detection sensitivity and reduces the false detection rate.

[0030] In practical applications, such as Figure 2 As shown, when the main body 1 of the stove has two burner openings 12 on the left and right, the arrangement of the first sampling electrode 2 around the outside of the burner opening 12 is shown.

[0031] The main control unit 3 is located inside the main body 1 of the stove and is electrically connected to the detection electrode 10. It is used to collect the capacitance signal of the detection electrode 10 and determine whether the overflow has occurred.

[0032] Specifically, the main control unit 3 includes a reference capacitor 31, a timer module 32, and a switching module 33; When the surface of the detection electrode 10 is covered with liquid, causing a change in parasitic capacitance, the switching module 33 connects the reference capacitor and the detection electrode 10 in parallel to form an equivalent capacitor. The timer module 32 calculates the time it takes for the equivalent capacitor to charge to the reference voltage. By comparing the change in charging time, the surface medium state of the detection electrode 10 is determined, and thus it is determined whether overflow has occurred.

[0033] This embodiment of the intelligent stove with overflow detection function is implemented as follows: The main control unit 3 is located inside the stove body 1, and each first sampling electrode 2 is connected to the capacitor sampling port of the main control unit 3 via a lead-out cable. The main control unit 3 includes a reference capacitor 31, a timer module 32, and a switching module 33. The reference capacitor is connected to the 6th pin of the main control unit 3. When liquid comes into contact with the first sampling electrode 2, causing a change in parasitic capacitance, the switching module 33 connects the reference capacitor and the first sampling electrode 2 in parallel to form an equivalent capacitance. The timer module 32 determines the state of the dielectric on the electrode surface by measuring the time change of the equivalent capacitance charging to the reference voltage, thereby realizing the detection of overflow liquid. Figure 3 The diagram shown is a schematic of the sampling circuit of Embodiment 1 of this application. The first sampling electrode 2 is connected to pins 28, 29, 30, 31, 32 and 33 respectively.

[0034] When the surface of the first sampling electrode 2 is not covered by liquid, its parasitic capacitance is the initial capacitance value formed by the electrode and the surrounding environment. At this time, the equivalent capacitance formed by the reference capacitor 31 connected in parallel with the electrode is small, and the time required for the timer module 32 to charge the equivalent capacitance to the reference voltage is short, which is recorded as the reference time. When liquid comes into contact with the surface of the first sampling electrode 2, the liquid medium significantly increases the equivalent capacitance between the first sampling electrode 2 and the surrounding environment, i.e., the parasitic capacitance increases, causing the overall equivalent capacitance formed by the reference capacitor 31 and the first sampling electrode 2 in parallel to increase. Since the charging current is constant or limited by circuit parameters, when the equivalent capacitance increases, the time required to charge to the same reference voltage will be correspondingly extended, which can be recorded as the detection time. The main control unit 3 measures the charging time in real time through the built-in timer module 32. When it detects that the charging time has changed from the reference time, the main control unit 3 will take action. Significantly increased testing time That is, the amount of change over time exceeds a preset threshold, for example...

[0035] ,in The minimum time difference set for experience determines that the surface medium state of the first sampling electrode 2 changes from "no liquid" to "liquid", thus identifying that liquid overflow has occurred around the burner opening 12; conversely, if the charging time does not significantly exceed the reference time, it is determined that no liquid overflow has occurred.

[0036] This embodiment of the smart stove also includes an overflow handling module 4, which is located inside the stove body 1 and electrically connected to the main control unit 3. This module includes a gas valve control module 41. When the main control unit 3 determines that an overflow has occurred, the gas valve control module 41 controls the gas valve of the stove to close. Specifically, when the main control unit 3 determines that an overflow has occurred, it sends a control signal to the gas valve control module 41. Upon receiving the signal, the gas valve control module 41 cuts off the gas supply by controlling a solenoid valve or mechanical device, thereby extinguishing the stove flame and preventing safety hazards caused by overflow. Figure 4 This is a circuit diagram of the air valve control module in an embodiment of this application.

[0037] Furthermore, the overflow handling module 4 includes an audible and visual alarm unit 42, which includes a buzzer and / or an indicator light, for issuing an audible and / or visual alarm when overflow is detected.

[0038] In one possible implementation, when the main control unit 3 determines that an overflow has occurred, the audible and visual alarm unit 42 is activated after receiving the signal. The buzzer sounds an alarm and the indicator light illuminates, thus alerting the user to the overflow through both sound and light alarms. The user can then take timely measures, such as cleaning up the spilled liquid, to avoid further losses and safety hazards.

[0039] This application embodiment achieves high-precision, low-false-judgment overflow detection and intelligent prevention by combining the first sampling electrodes arranged in a ring at equal intervals on the outer side of the stove opening with the capacitance-time detection principle of the main control unit and the linkage control of the gas valve closing quickly when the pot overflows, which significantly improves the safety and reliability of the smart stove.

[0040] Example 2 The difference between Example 2 and Example 1 is that the outer side of the burner opening 12 of the main body 1 of the stove is also provided with a pot support base. The pot support base is used to support the pot and place it stably on the stove for cooking. The pot support base is provided with a flow guiding structure, and the detection electrode can be located in the flow guiding structure.

[0041] Specifically, the detection electrode includes a second sampling electrode 5, which is disposed on the pot support base outside the burner opening 12; the base of the pot support base is provided with a flow guiding structure 6, which includes a flow guiding groove 61, and the second sampling electrode 5 is disposed at the lowest point of the flow guiding groove 61. Figure 5 The figure shows a schematic diagram of the structure of the smart stove in Example 2, which shows the chassis structure of the stove body and the pot support base.

[0042] This ensures that the liquid can flow smoothly over the surface of the second sampling electrode 5 when the pot overflows, thereby enabling the detection of the overflow phenomenon.

[0043] Furthermore, such as Figure 6 As shown, the guide channel 61 is an inclined annular channel with one side higher than the other. A water collection tank 62 is provided on the lowest side of the guide channel 61, and the guide channel 61 and the water collection tank 62 are connected. This design allows the liquid to flow naturally to lower positions under the action of gravity. When the liquid flows into the guide channel 61, it will gradually collect at the lowest point of the guide channel 61 under the action of gravity, and then flow through the upper surface of the second sampling electrode 5 into the water collection tank 62, thereby realizing the detection, orderly guidance and collection of the liquid.

[0044] Furthermore, the surface of the second sampling electrode 5 is made of PP plastic or glass, and the second sampling electrode 5 is attached and fixed to the bottom of the guide channel 61. These materials have high temperature resistance, can adapt to the high temperature environment during cooking, and do not affect the accurate detection of the presence of liquid.

[0045] The detection electrode in this embodiment can effectively detect overflow phenomena. When liquid flows over the surface of the second sampling electrode 5, the parasitic capacitance of the electrode changes. This change can be detected by the capacitance sampling port connected to the main control unit 3. The main control unit 3 determines whether there is liquid on the surface of the second sampling electrode 5 based on the change in parasitic capacitance, thereby achieving an accurate judgment of overflow phenomena. Compared with Scheme 1, this embodiment reduces the number of electrodes, using only one second sampling electrode 5 to complete the overflow judgment, and the size of the electrode can also be set to be smaller. This not only reduces costs but also improves the flexibility and reliability of detection. Figure 7 This is a schematic diagram of the sampling circuit of Embodiment 2 of this application.

[0046] This application sets a detection electrode on the outside of the burner opening and sets a main control unit and an overflow handling module electrically connected to the detection electrode inside the main body of the stove. It can collect capacitance signals in real time to determine whether an overflow phenomenon has occurred and control the gas valve to close. This realizes real-time detection of overflow phenomenon, the detection system is compatible with a variety of cookware, and has the functions of intelligent prediction and active intervention, which significantly improves the safety and intelligence level of the stove.

[0047] Obviously, the embodiments described above are merely some of the embodiments in this specification, and not all of them. Based on the embodiments in this specification, those skilled in the art can make other variations or modifications without creative effort, and all such variations should fall within the scope of protection of the embodiments in this specification.

[0048] Other embodiments of the embodiments of this specification will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the embodiments of this specification that follow the general principles of the embodiments of this specification and include common knowledge or customary techniques in the art not disclosed in the embodiments of this specification. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this specification are indicated by the following claims.

[0049] It should be understood that the embodiments described herein are not limited to the precise structures already described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments described herein is limited only by the appended claims.

Claims

1. A smart stove with overflow detection function, characterized in that, include: The main body of the stove (1) has a stove head opening (12) on its top, and a detection electrode (10) is provided on the outside of the stove head opening (12). The main control unit (3) is located inside the main body (1) of the stove and is electrically connected to the detection electrode (10). It is used to collect the capacitance signal of the detection electrode (10) and determine whether the overflow has occurred. The overflow handling module (4) is located inside the main body (1) of the stove and is electrically connected to the main control unit (3). It includes a gas valve control module (41). When the main control unit (3) determines that an overflow has occurred, the gas valve control module (41) controls the gas valve of the stove to close. The detection electrode (10) includes a second sampling electrode (5), which is located on the pot support outside the stove opening (12); the base of the pot support is provided with a flow guiding structure (6), which includes a flow guiding groove (61), and the second sampling electrode (5) is located at the lowest point of the flow guiding groove (61).

2. The intelligent stove with overflow detection function according to claim 1, characterized in that, The detection electrode (10) includes a plurality of first sampling electrodes (2), which are arranged at equal intervals around the stove head opening (12) and fixed to the inner surface of the glass panel of the stove body (1).

3. The intelligent stove with overflow detection function according to claim 2, characterized in that, The number of the first sampling electrodes (2) is 6.

4. The intelligent stove with overflow detection function according to claim 2, characterized in that, Multiple first sampling electrodes (2) are fixedly connected to the inner surface of the glass panel through an adhesive layer.

5. The intelligent stove with overflow detection function according to claim 2, characterized in that, A gap is provided between the first sampling electrode (2) and the explosion-proof mesh inside the glass panel, and the vertical distance of the gap is not less than 5mm.

6. The intelligent stove with overflow detection function according to claim 1, characterized in that, The guide channel (61) is an inclined annular channel with one side higher than the other side. A water collection tank (62) is provided on the lowest side of the guide channel (61), and the guide channel (61) is connected to the water collection tank (62).

7. The intelligent stove with overflow detection function according to claim 1, characterized in that, The surface of the second sampling electrode (5) is made of PP plastic or glass material, and the second sampling electrode (5) is attached and fixed to the bottom of the guide groove (61).

8. The intelligent stove with overflow detection function according to claim 1, characterized in that, The main control unit (3) includes a reference capacitor (31), a timer module (32), and a switching module (33). When the surface of the detection electrode (10) is covered with liquid, causing a change in parasitic capacitance, the switching module (33) connects the reference capacitor (31) and the detection electrode (10) in parallel to form an equivalent capacitor. The timer module (32) calculates the time it takes for the equivalent capacitor to charge to the reference voltage. By comparing the change in charging time, the surface medium state of the detection electrode (10) is determined, and then it is determined whether an overflow occurs.

9. The intelligent stove with overflow detection function according to claim 1, characterized in that, The overflow handling module (4) includes an audio-visual reminder unit (42), which includes a buzzer and / or an indicator light, for issuing an audio and / or light alarm when overflow is detected.

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