Electromagnetic induction heating kitchen ware glass panel
By introducing a breakage and leakage detection module into the glass panel of the induction cooker, the problem of breakage and leakage caused by impacts to the glass panel of the induction cooker is solved, and real-time detection and prompts of damage are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO XINGGANG BILILAI GLASS TECH CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-24
AI Technical Summary
Existing induction cookers have glass panels that are easily broken by bumps during use, and it is impossible to visually determine whether there are cracks or leaks, resulting in damage and rendering them unusable.
A breakage detection module and a water leakage detection module are introduced into the glass panel of the induction cooker. The conductive mesh and resistive detection strip are used to detect the breakage and water leakage of the glass panel, and the logic and execution module issues a prompt.
It enables real-time detection of breakage and water leakage on the glass panel of the induction cooker, ensuring that users are aware of panel damage in a timely manner and preventing further damage.
Smart Images
Figure CN224162641U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass panel technology, and in particular to a glass panel for electromagnetic induction heating kitchen appliances. Background Technology
[0002] Induction cooktop glass panels are typically made of special glass, offering excellent heat resistance and conductivity. They can withstand high temperatures, evenly distributing heat from the induction cooktop to the bottom of the cookware for optimal cooking results. The smooth surface of the glass panel is easy to clean, allowing for easy wiping away of cooking residue and grease. Furthermore, the glass panel is aesthetically pleasing and can blend seamlessly with the overall style of the kitchen.
[0003] In practical applications, the glass panel of an induction cooker is in direct contact with cookware, so it is prone to breakage due to impacts. Normally, a crack in the glass panel alone does not affect its use. It is only when water leaks at the crack that the induction cooker becomes unusable. However, in reality, people cannot visually determine whether there is a crack or water leakage in the glass panel of an induction cooker.
[0004] Therefore, an electromagnetic induction heating glass panel for kitchen appliances is proposed to solve or alleviate the above problems. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an electromagnetic induction heating glass panel for kitchen appliances.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An electromagnetic induction heating kitchen appliance glass panel includes an outer glass layer and an inner glass layer bonded together, and also includes a breakage detection module and a leakage detection module. The detection end of the breakage detection module is disposed between the outer glass layer and the inner glass layer, and the detection end of the leakage detection module is disposed on the bottom surface of the inner glass layer. The breakage detection module and the leakage detection module are jointly coupled to a logic and execution module, and the logic and execution module provides a prompt after responding to both the breakage detection module and the leakage detection module.
[0008] Preferably, the breakage detection module includes a conductive mesh, a first voltage divider resistor, a second voltage divider resistor, a first LM393 voltage comparator, a first reference voltage divider resistor, a second reference voltage divider resistor, a first hysteresis resistor, and a first filter capacitor;
[0009] The conductive mesh is disposed between the outer glass layer and the inner glass layer. One end of the conductive mesh is grounded, and the other end of the conductive mesh is grounded after being connected in series with a first voltage divider resistor and a second voltage divider resistor. One end of the first reference voltage divider resistor is energized, and the other end of the first reference voltage divider resistor is grounded after being connected in series with a second reference voltage divider resistor. The non-inverting input of the first LM393 voltage comparator is connected to the voltage divider point between the first and second voltage divider resistors. The inverting input of the first LM393 voltage comparator is connected to the voltage divider point between the first and second reference voltage divider resistors. The output of the first LM393 voltage comparator outputs a signal, and the two ends of the first hysteresis resistor are connected to the non-inverting input and the output of the first LM393 voltage comparator, respectively. The first filter capacitor is connected in parallel between the non-inverting input of the first LM393 voltage comparator and ground.
[0010] Preferably, the conductive mesh is a closed loop printed with silver paste.
[0011] Preferably, the leakage detection module includes a resistive detection band, a third voltage divider resistor, a fourth voltage divider resistor, a second LM393 voltage comparator, a third reference voltage divider resistor, a fourth reference voltage divider resistor, a second hysteresis resistor, and a second filter capacitor.
[0012] The resistive detection strip is laid on the inner glass layer away from the outer glass layer. One end of the resistive detection strip is grounded, and the other end is grounded after being connected in series with a third voltage divider resistor and a fourth voltage divider resistor. One end of the third reference voltage divider resistor is energized, and the other end is grounded after being connected in series with a fourth reference voltage divider resistor. The non-inverting input of the second LM393 voltage comparator is connected to the voltage divider point between the third and fourth voltage divider resistors. The inverting input of the second LM393 voltage comparator is connected to the voltage divider point between the third and fourth reference voltage divider resistors. The output of the second LM393 voltage comparator outputs a signal, and the two ends of the second hysteresis resistor are connected to the non-inverting input and the output of the second LM393 voltage comparator, respectively. The second filter capacitor is connected in parallel between the non-inverting input of the second LM393 voltage comparator and ground.
[0013] Preferably, the resistive detection strip includes a serpentine copper foil structure and a water-absorbing non-woven fabric wrapped around the outside of the serpentine copper foil structure, and the resistive detection strip is spot-adheded to the bottom surface of the inner glass layer.
[0014] Preferably, the logic and execution module includes a 74HC08 AND gate chip, an NPN transistor, a base resistor, a relay, a freewheeling diode, and a green LED.
[0015] The two input terminals of the 74HC08 AND gate chip are connected to the output terminals of the breakage detection module and the water leakage detection module, respectively. The output terminal of the 74HC08 AND gate chip is connected to the base of the NPN transistor after being connected in series with a base resistor. The emitter of the NPN transistor is grounded. The NPN transistor is connected in series with a relay and then energized. The anode of the freewheeling diode is connected to the collector of the NPN transistor. The cathode of the freewheeling diode is energized. The green LED is connected in series with the normally open contact of the relay and is energized.
[0016] Preferably, it also includes a power supply module, which includes an LM7805 voltage regulator chip, a third filter capacitor, and a fourth filter capacitor;
[0017] The input terminal of the LM7805 voltage regulator chip is powered, the output terminal of the LM7805 voltage regulator chip outputs a 5V voltage, the ground terminal of the LM7805 voltage regulator chip is grounded, one end of the third filter capacitor is connected to the input terminal of the LM7805 voltage regulator chip, and the other end of the third filter capacitor is grounded, one end of the fourth filter capacitor is connected to the output terminal of the LM7805 voltage regulator chip, and the other end of the fourth filter capacitor is grounded.
[0018] This utility model has the following beneficial effects:
[0019] In operation, this invention utilizes an outer glass layer and an inner glass layer to enhance the strength of the glass panel and prevent water leakage. If a glass layer breaks, the conductive grid of the breakage detection module sends a signal to the logic and execution module. If the glass layer is completely broken and leaks water, the serpentine copper foil structure of the leak detection module detects the moisture and notifies the logic and execution module, thereby illuminating a green LED to indicate that the panel is broken and leaking. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a structural block diagram of the breakage detection module, the water leakage detection module, and the water leakage detection module in this utility model.
[0023] In the diagram: 1. Outer glass layer; 2. Inner glass layer; 3. Power supply module; 4. Breakage detection module; 5. Leakage detection module; 6. Logic and execution module. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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 utility model.
[0028] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] A glass panel for an electromagnetic induction heated kitchen appliance, such as Figure 1 As shown, it includes an outer glass layer 1 and an inner glass layer 2 that are bonded together, such as... Figure 2 As shown, it also includes a breakage detection module 4 and a leakage detection module 5. The detection end of the breakage detection module 4 is located between the outer glass layer 1 and the inner glass layer 2, and the detection end of the leakage detection module 5 is located on the bottom surface of the inner glass layer 2. The breakage detection module 4 and the leakage detection module 5 are coupled together to a logic and execution module 6. The logic and execution module 6 responds to both the breakage detection module 4 and the leakage detection module 5 and then provides a prompt.
[0031] The breakage detection module 4 includes a conductive mesh, a first voltage divider resistor, a second voltage divider resistor, a first LM393 voltage comparator, a first reference voltage divider resistor, a second reference voltage divider resistor, a first hysteresis resistor, and a first filter capacitor. The conductive mesh is disposed between the outer glass layer 1 and the inner glass layer 2. The conductive mesh is a closed loop printed with silver paste. One end of the conductive mesh is grounded, and the other end of the conductive mesh is connected to ground after being connected in series with the first and second voltage divider resistors. One end of the first reference voltage divider resistor is connected to power, and the other end of the first reference voltage divider resistor is connected in series with the second reference voltage divider resistor. The non-inverting input of the first LM393 voltage comparator is connected to the voltage divider point between the first and second voltage divider resistors. The inverting input of the first LM393 voltage comparator is connected to the voltage divider point between the first and second reference voltage divider resistors. The output of the first LM393 voltage comparator outputs a signal. The two ends of the first hysteresis resistor are connected to the non-inverting input and the output of the first LM393 voltage comparator, respectively. The first filter capacitor is connected in parallel between the non-inverting input of the first LM393 voltage comparator and ground.
[0032] The leakage detection module 5 includes a resistive detection strip, a third voltage divider resistor, a fourth voltage divider resistor, a second LM393 voltage comparator, a third reference voltage divider resistor, a fourth reference voltage divider resistor, a second hysteresis resistor, and a second filter capacitor. The resistive detection strip is laid on the side of the inner glass layer 2 away from the outer glass layer 1. The resistive detection strip includes a serpentine copper foil structure and absorbent non-woven fabric wrapped around the outside of the serpentine copper foil structure. The resistive detection strip is spot-adheded to the bottom surface of the inner glass layer 2. One end of the resistive detection strip is grounded, and the other end is connected in series with the third and fourth voltage divider resistors and then grounded. One end of the third reference voltage divider resistor is connected to power. The other end of the voltage divider resistor is connected in series with the fourth reference voltage divider resistor and then grounded. The non-inverting input of the second LM393 voltage comparator is connected to the voltage divider point between the third and fourth voltage divider resistors. The inverting input of the second LM393 voltage comparator is connected to the voltage divider point between the third and fourth reference voltage divider resistors. The output of the second LM393 voltage comparator outputs a signal. The two ends of the second hysteresis resistor are connected to the non-inverting input and the output of the second LM393 voltage comparator, respectively. The second filter capacitor is connected in parallel between the non-inverting input of the second LM393 voltage comparator and ground.
[0033] The logic and execution module 6 includes a 74HC08 AND gate chip, an NPN transistor, a base resistor, a relay, a freewheeling diode, and a green LED. The two input terminals of the 74HC08 AND gate chip are connected to the output terminals of the breakage detection module 4 and the water leakage detection module 5, respectively. The output terminal of the 74HC08 AND gate chip is connected to the base of the NPN transistor after being connected in series with the base resistor. The emitter of the NPN transistor is grounded. The NPN transistor is connected in series with the relay and then energized. The anode of the freewheeling diode is connected to the collector of the NPN transistor, and the cathode of the freewheeling diode is energized. The green LED is connected in series with the normally open contact of the relay and is energized.
[0034] Power module 3 includes an LM7805 voltage regulator chip, a third filter capacitor, and a fourth filter capacitor. The input terminal of the LM7805 voltage regulator chip is connected to power, the output terminal of the LM7805 voltage regulator chip outputs a 5V voltage, and the ground terminal of the LM7805 voltage regulator chip is grounded. One end of the third filter capacitor is connected to the input terminal of the LM7805 voltage regulator chip, and the other end of the third filter capacitor is grounded. One end of the fourth filter capacitor is connected to the output terminal of the LM7805 voltage regulator chip, and the other end of the fourth filter capacitor is grounded.
[0035] In actual operation, this invention uses an outer glass layer 1 and an inner glass layer 2 to enhance the strength of the glass panel and prevent it from easily leaking. If the outer glass layer 1 and the inner glass layer 2 break, the conductive mesh of the silver paste-printed closed loop in the breakage detection module 4 will detect the breakage, allowing the logic and execution module 6 to receive the breakage signal. Furthermore, if the outer glass layer 1 and the inner glass layer 2 are completely broken and leaking, the moisture can be detected by the serpentine copper foil structure wrapped with absorbent non-woven fabric in the leak detection module 5. This allows the logic and execution module 6 to receive the leaking signal, which will then power on the green LED light to provide feedback on the glass panel damage, ensuring that the glass panel is indeed broken and leaking when feedback is received.
[0036] The working process of the breakage detection module 4 and the water leakage detection module 5 is as follows:
[0037] Under normal conditions, the power module 3 converts the input 12V DC power into 5V through the LM7805 voltage regulator chip, which supplies the first LM393 voltage comparator of the breakage detection module 4, the second LM393 voltage comparator of the water leakage detection module 5, and the 74HC08 AND gate chip of the logic and execution module 6.
[0038] At this time, the conductive grid printed in the glass panel remains closed, and the voltage division points of the first and second voltage divider resistors of the breakage detection module 4 are 6V, which is equal to the reference voltage of the inverting input terminal of the first LM393 voltage comparator. The output terminal of the first LM393 voltage comparator is at a low level.
[0039] Meanwhile, the resistance of the resistive detection strip is extremely high in the dry state. The voltage at the dividing point of the third and fourth voltage divider resistors of the water leakage detection module 5 is close to 0V, which is lower than the reference voltage of 3V at the inverting input of the second LM393 voltage comparator. The output of the second LM393 voltage comparator is also at a low level.
[0040] At this time, the input terminals of the 74HC08 AND gate chip are all at low level, and the output terminal (pin 3) is at low level. The NPN transistor is kept off, no current flows through the relay coil, its normally open contact remains open, and the green LED is de-energized.
[0041] When the glass panel breaks, the conductive mesh breaks, and the voltage at the voltage divider point of the breakage detection module 4 rises to 12V, which is higher than the 6V reference voltage at the inverting input of the first LM393 voltage comparator. The output of the first LM393 voltage comparator jumps to a high level. However, if there is no water leakage, the output of the second LM393 voltage comparator in the water leakage detection module 5 remains at a low level, the output of the 74HC08 AND gate chip remains at a low level, and the relay does not operate.
[0042] If the glass panel only leaks water but does not break, the resistance of the resistive detection band drops sharply to about 1kΩ after encountering water, and the voltage at the voltage divider point rises to 4V, which is higher than the 3V reference voltage at the inverting input of the second LM393 voltage comparator. The output of the second LM393 voltage comparator jumps to a high level, but because the output of the first LM393 voltage comparator is at a low level, the 74HC08 AND gate chip still has no output.
[0043] Only when the glass panel breaks and leaks water simultaneously, both signals are input to the 74HC08 AND gate chip, which outputs a high level, driving the NPN transistor to conduct, energizing the relay coil, closing the normally open contact, and energizing the green LED to light up, thus providing a good warning effect.
[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the 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 principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A glass panel for an electromagnetic induction heating kitchen appliance, characterized in that, It includes an outer glass layer (1) and an inner glass layer (2) that are bonded together, and also includes a breakage detection module (4) and a leakage detection module (5). The detection end of the breakage detection module (4) is located between the outer glass layer (1) and the inner glass layer (2), and the detection end of the leakage detection module (5) is located on the bottom surface of the inner glass layer (2). The breakage detection module (4) and the leakage detection module (5) are coupled together to a logic and execution module (6). The logic and execution module (6) responds to both the breakage detection module (4) and the leakage detection module (5) and then provides a prompt.
2. The electromagnetic induction heating kitchen appliance glass panel according to claim 1, characterized in that, The breakage detection module (4) includes a conductive grid, a first voltage divider resistor, a second voltage divider resistor, a first LM393 voltage comparator, a first reference voltage divider resistor, a second reference voltage divider resistor, a first hysteresis resistor, and a first filter capacitor; The conductive mesh is disposed between the outer glass layer (1) and the inner glass layer (2). One end of the conductive mesh is grounded, and the other end of the conductive mesh is grounded after being connected in series with the first voltage divider resistor and the second voltage divider resistor. One end of the first reference voltage divider resistor is energized, and the other end of the first reference voltage divider resistor is grounded after being connected in series with the second reference voltage divider resistor. The non-inverting input terminal of the first LM393 voltage comparator is connected to the voltage divider point between the first voltage divider resistor and the second voltage divider resistor. The inverting input terminal of the first LM393 voltage comparator is connected to the voltage divider point between the first reference voltage divider resistor and the second reference voltage divider resistor. The output terminal of the first LM393 voltage comparator outputs a signal, and the two ends of the first hysteresis resistor are respectively connected to the non-inverting input terminal and the output terminal of the first LM393 voltage comparator. The first filter capacitor is connected in parallel between the non-inverting input terminal of the first LM393 voltage comparator and ground.
3. The electromagnetic induction heating kitchen appliance glass panel according to claim 2, characterized in that, The conductive mesh is a closed loop printed with silver paste.
4. The electromagnetic induction heating kitchen appliance glass panel according to claim 1, characterized in that, The water leakage detection module (5) includes a resistive detection band, a third voltage divider resistor, a fourth voltage divider resistor, a second LM393 voltage comparator, a third reference voltage divider resistor, a fourth reference voltage divider resistor, a second hysteresis resistor, and a second filter capacitor. The resistive detection strip is laid on the side of the inner glass layer (2) away from the outer glass layer (1). One end of the resistive detection strip is grounded, and the other end of the resistive detection strip is connected in series with the third voltage divider resistor and the fourth voltage divider resistor and then grounded. One end of the third reference voltage divider resistor is connected to power, and the other end of the third reference voltage divider resistor is connected in series with the fourth reference voltage divider resistor and then grounded. The non-inverting input terminal of the second LM393 voltage comparator is connected to the voltage divider point between the third voltage divider resistor and the fourth voltage divider resistor. The inverting input terminal of the second LM393 voltage comparator is connected to the voltage divider point between the third reference voltage divider resistor and the fourth reference voltage divider resistor. The output terminal of the second LM393 voltage comparator outputs a signal, and the two ends of the second hysteresis resistor are connected to the non-inverting input terminal and the output terminal of the second LM393 voltage comparator, respectively. The second filter capacitor is connected in parallel between the non-inverting input terminal of the second LM393 voltage comparator and ground.
5. The electromagnetic induction heating kitchen appliance glass panel according to claim 4, characterized in that, The resistive detection strip includes a serpentine copper foil structure and a water-absorbing non-woven fabric wrapped around the outside of the serpentine copper foil structure. The resistive detection strip is spot-adheded to the bottom surface of the inner glass layer (2).
6. The electromagnetic induction heating kitchen appliance glass panel according to claim 1, characterized in that, The logic and execution module (6) includes a 74HC08 AND gate chip, an NPN transistor, a base resistor, a relay, a freewheeling diode, and a green LED. The two input terminals of the 74HC08 AND gate chip are connected to the output terminals of the breakage detection module (4) and the water leakage detection module (5), respectively. The output terminal of the 74HC08 AND gate chip is connected to the base of the NPN transistor after being connected in series with a base resistor. The emitter of the NPN transistor is grounded. The NPN transistor is connected in series with a relay and then energized. The anode of the freewheeling diode is connected to the collector of the NPN transistor. The cathode of the freewheeling diode is energized. The green LED is connected in series with the normally open contact of the relay and energized.
7. The electromagnetic induction heating kitchen appliance glass panel according to claim 1, characterized in that, It also includes a power supply module (3), which includes an LM7805 voltage regulator chip, a third filter capacitor, and a fourth filter capacitor; The input terminal of the LM7805 voltage regulator chip is powered, the output terminal of the LM7805 voltage regulator chip outputs a 5V voltage, the ground terminal of the LM7805 voltage regulator chip is grounded, one end of the third filter capacitor is connected to the input terminal of the LM7805 voltage regulator chip, and the other end of the third filter capacitor is grounded, one end of the fourth filter capacitor is connected to the output terminal of the LM7805 voltage regulator chip, and the other end of the fourth filter capacitor is grounded.