Electronic heating anti-fog glass panel
By introducing an anti-fog electric heating circuit and a PTC heating film into the glass panel, the problem of fogging caused by high-temperature environments on the glass panel is solved, enabling clear observation of the working status and improving ease of use.
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
- 2026-05-22
Smart Images
Figure CN224267153U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass panel technology, and in particular to an electronically heated anti-fog glass panel. Background Technology
[0002] Glass panels are a common material in modern kitchens, widely used in kitchen appliances such as induction cookers and stovetops. They are typically made of special tempered glass, possessing excellent high-temperature resistance, capable of withstanding the high temperatures generated during cooking without easily breaking. Furthermore, the smooth, flat surface of glass panels makes cleaning very convenient; simply wiping with a damp cloth removes grease and debris. In addition, their transparent or semi-transparent nature allows users to clearly see the heating element's operating status below, combining aesthetics and practicality. However, glass panels have relatively low hardness, so avoid impacts from hard objects to prevent scratches or damage.
[0003] However, in actual use, the glass panel may become fogged up due to the working environment of the stove. When the fog covers the glass panel of the induction cooker or stove, the operator's observation of the working status of the induction cooker will be interfered with.
[0004] Therefore, an electronically heated anti-fog glass panel 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 electronically heated anti-fog glass panel.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An electronically heated anti-fog glass panel includes an outer glass layer, an inner glass layer, and an anti-fog electric heating circuit disposed between the two. The anti-fog electric heating circuit is coupled to a current detection and triggering module, which is used to detect the current status of the main heating module of the induction cooker and control the anti-fog electric heating circuit to work and remove fog.
[0008] Preferably, it also includes a main power input module and an induction cooker main heating module, wherein the induction cooker main heating module is disposed on the bottom surface of the inner glass layer and is coupled to the main power input module.
[0009] Preferably, the main power input module includes a glass tube fuse and a double-pole circuit breaker.
[0010] The input terminal of the glass tube fuse is connected to the live wire of an external 220V AC power supply. The output terminal of the glass tube fuse is connected to the live wire input terminal of the double-pole circuit breaker. The neutral wire input terminal of the double-pole circuit breaker is directly connected to the neutral wire of the external 220V AC power supply. The live wire output terminal of the double-pole circuit breaker serves as the live wire output terminal of the main power input module, and the neutral wire output terminal of the double-pole circuit breaker serves as the neutral wire output terminal of the main power input module.
[0011] Preferably, the main heating module of the induction cooker includes a high-frequency coil, an IGBT power module, and a resonant capacitor;
[0012] The first end of the high-frequency coil is connected to the live wire output terminal of the main power input module, the second end of the high-frequency coil is connected to the collector of the IGBT power module, the emitter of the IGBT power module is connected to one end of the resonant capacitor, the gate of the IGBT power module is used to connect to the drive signal output terminal of the induction cooker main control board, and the second end of the resonant capacitor is connected to the neutral wire output terminal of the main power input module.
[0013] Preferably, the current detection and triggering module includes a current transformer, a rectifier bridge, a filter capacitor, a Zener diode, and a MOSFET switch.
[0014] The first end of the primary winding of the current transformer is connected to one end of the high-frequency coil in the main heating module of the induction cooker. The second end of the primary winding of the current transformer is connected to the collector of the IGBT power module in the main heating module of the induction cooker. The first end of the secondary winding of the current transformer is connected to the first AC input terminal of the rectifier bridge. The second end of the secondary winding of the current transformer is connected to the second AC input terminal of the rectifier bridge. The positive output terminal of the rectifier bridge is connected to the positive terminal of the filter capacitor, the cathode of the Zener diode, and the gate of the MOSFET switch. The negative output terminal of the rectifier bridge is connected to the common ground of the negative terminal of the filter capacitor, the anode of the Zener diode, and the source of the MOSFET switch. The drain of the MOSFET switch is connected to the control terminal of the heating circuit switching module in the anti-fog heating circuit.
[0015] Preferably, the anti-fog electric heating circuit includes an electric heating circuit switch module, an electric heating element and a protection module. The control terminal of the electric heating circuit switch module is connected to the output terminal of the current detection and triggering module, and the output terminal of the electric heating circuit switch module is connected to the input terminal of the electric heating element and protection module.
[0016] Preferably, the electrothermal circuit switching module includes a relay and a resettable fuse;
[0017] The positive terminal of the relay coil is connected to the drain of the MOSFET switch, the negative terminal of the relay coil is grounded, the open contact input terminal of the relay is connected to the live wire output terminal of the main power input module, and the open contact output terminal of the relay is connected to the input terminal of the heating element and the protection module through a self-resetting fuse.
[0018] Preferably, the heating element and protection module include a PTC heating film and a fusible thermal fuse;
[0019] The second end of the self-resetting fuse is connected to one end of the fusible thermal fuse, the other end of the fusible thermal fuse is connected to the first electrode of the PTC heating film, the second electrode of the PTC heating film is connected to the neutral output terminal of the main power input module, and the PTC heating film is bonded between the inner glass layer and the outer glass layer.
[0020] This utility model has the following beneficial effects:
[0021] In application of this invention, the main power input module controls the main heating module of the induction cooker to operate. After the current detection and triggering module detects the working signal, the electric heating circuit switch module controls the electric heating element and protection module to operate. The PTC heating film heats between the inner and outer glass layers, eliminating fog and preventing interference with the operator's observation of the induction cooker's operating status. Attached Figure Description
[0022] 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.
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a structural block diagram of the anti-fog electric heating circuit in this utility model.
[0025] In the diagram: 1. Outer glass layer; 2. Inner glass layer; 3. Main power input module; 4. Main heating module of induction cooker; 5. Current detection and triggering module; 6. Electric heating circuit switch module; 7. Electric heating element and protection module. Detailed Implementation
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0031] 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.
[0032] An electronically heated anti-fog glass panel, such as Figure 1 and Figure 2As shown, it includes an outer glass layer 1, an inner glass layer 2, and an anti-fog heating circuit disposed between the two. The anti-fog heating circuit is coupled to a current detection and triggering module 5. The current detection and triggering module 5 is used to detect the current status of the main heating module 4 of the induction cooker and control the anti-fog heating circuit to work and remove fog. It also includes a main power input module 3 and an induction cooker main heating module 4. The induction cooker main heating module 4 is disposed on the bottom surface of the inner glass layer 2 and is coupled to the main power input module 3.
[0033] The main power input module 3 includes a glass tube fuse and a double-pole circuit breaker. The input terminal of the glass tube fuse is connected to the live wire of the external 220V AC power supply. The output terminal of the glass tube fuse is connected to the live wire input terminal of the double-pole circuit breaker. The neutral wire input terminal of the double-pole circuit breaker is directly connected to the neutral wire of the external 220V AC power supply. The live wire output terminal of the double-pole circuit breaker serves as the live wire output terminal of the main power input module 3, and the neutral wire output terminal of the double-pole circuit breaker serves as the neutral wire output terminal of the main power input module 3.
[0034] The main heating module 4 of the induction cooker includes a high-frequency coil, an IGBT power module, and a resonant capacitor. The first end of the high-frequency coil is connected to the live wire output terminal of the main power input module 3, the second end of the high-frequency coil is connected to the collector of the IGBT power module, the emitter of the IGBT power module is connected to one end of the resonant capacitor, the gate of the IGBT power module is used to connect to the drive signal output terminal of the main control board of the induction cooker, and the second end of the resonant capacitor is connected to the neutral wire output terminal of the main power input module 3.
[0035] The current detection and triggering module 5 includes a current transformer, a rectifier bridge, a filter capacitor, a Zener diode, and a MOSFET switch. The first end of the primary winding of the current transformer is connected to one end of the high-frequency coil in the main heating module 4 of the induction cooker. The second end of the primary winding of the current transformer is connected to the collector of the IGBT power module in the main heating module 4 of the induction cooker. The first end of the secondary winding of the current transformer is connected to the first AC input terminal of the rectifier bridge. The second end of the secondary winding of the current transformer is connected to the second AC input terminal of the rectifier bridge. The positive output terminal of the rectifier bridge is connected to the positive terminal of the filter capacitor, the cathode of the Zener diode, and the gate of the MOSFET switch. The negative output terminal of the rectifier bridge is connected to the common ground of the negative terminal of the filter capacitor, the anode of the Zener diode, and the source of the MOSFET switch. The drain of the MOSFET switch is connected to the control terminal of the heating circuit switch module 6 in the anti-fog heating circuit.
[0036] The anti-fog electric heating circuit includes an electric heating circuit switch module 6 and an electric heating element and protection module 7. The control terminal of the electric heating circuit switch module 6 is connected to the output terminal of the current detection and triggering module 5, and the output terminal of the electric heating circuit switch module 6 is connected to the input terminal of the electric heating element and protection module 7.
[0037] The electric heating circuit switch module 6 includes a relay and a resettable fuse; the positive terminal of the relay coil is connected to the drain of the MOSFET switch, the negative terminal of the relay coil is grounded, the open contact input terminal of the relay is connected to the live wire output terminal of the main power input module 3, and the open contact output terminal of the relay is connected to the input terminal of the electric heating element and protection module 7 through the resettable fuse.
[0038] The heating element and protection module 7 includes a PTC heating film and a fusible thermal fuse;
[0039] The second end of the self-resetting fuse is connected to one end of the fusible thermal fuse, the other end of the fusible thermal fuse is connected to the first electrode of the PTC heating film, the second electrode of the PTC heating film is connected to the neutral output terminal of the main power input module 3, and the PTC heating film is attached between the inner glass layer 2 and the outer glass layer 1.
[0040] In practical application, the main power input module 3 controls the main heating module 4 of the induction cooker to work and heat, thus enabling the induction cooker to operate. At this time, the current detection and triggering module 5 can detect that the main heating module 4 of the induction cooker has started to work. After it starts working, the electric heating circuit switch module 6 can control the electric heating element and protection module 7 to work. The PTC heating film in the electric heating element and protection module 7 can heat between the inner glass layer 2 and the outer glass layer 1, so that the fog on the side of the inner glass layer 2 and the outer glass layer 1 that is far apart from each other is eliminated after heating, avoiding the problem that the operator's observation of the working status of the induction cooker will be interfered with.
[0041] More specifically:
[0042] When the user turns on the induction cooker, the 220V AC power is connected through the glass tube fuse and double-pole circuit breaker of the main power input module 3. The live wire forms the main heating circuit with the IGBT power module through the high-frequency coil, while the neutral wire passes through the closed circuit of the resonant capacitor.
[0043] At this time, the IGBT module is turned on under the high-frequency drive signal. The high-frequency coil generates an alternating magnetic field to drive the pot to heat up. The main circuit current flows through the primary winding of the current transformer connected in series. The secondary winding of the current transformer induces an AC signal proportional to the main current. This signal is rectified by the rectifier bridge and smoothed by the filter capacitor to form a DC voltage. When the voltage exceeds the threshold of the Zener diode, it triggers the MOSFET switch to turn on, driving the coil of the relay to be energized and closing its normally open contacts.
[0044] The 220V AC power is then supplied to the PTC heating film through the normally open contacts of the relay, the self-resetting fuse, and the fusible thermal fuse. Due to its resistive characteristics, the PTC heating film heats up rapidly to the preset threshold. Its resistance increases sharply with the temperature, and the power is automatically limited to prevent overheating.
[0045] The heat generated by the PTC heating film is evenly transferred to the edge area of the glass panel, eliminating the fog formed by temperature difference or steam condensation. When the induction cooker is turned off, the main circuit current disappears, the secondary signal of the current transformer returns to zero, the MOSFET switch is turned off, the normally open contact of the relay is opened, and the electric heating circuit stops working synchronously.
[0046] 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. An electronically heated anti-fog glass panel, characterized in that, It includes an outer glass layer (1), an inner glass layer (2), and an anti-fog electric heating circuit disposed between the two. The anti-fog electric heating circuit is coupled to a current detection and triggering module (5). The current detection and triggering module (5) is used to detect the current status of the main heating module (4) of the induction cooker and control the anti-fog electric heating circuit to work and remove fog.
2. The electronically heated anti-fog glass panel according to claim 1, characterized in that, It also includes a main power input module (3) and an induction cooker main heating module (4), wherein the induction cooker main heating module (4) is disposed on the bottom surface of the inner glass layer (2), and the induction cooker main heating module (4) is coupled to the main power input module (3).
3. The electronically heated anti-fog glass panel according to claim 2, characterized in that, The main power input module (3) includes a glass tube fuse and a double-pole circuit breaker. The input terminal of the glass tube fuse is connected to the live wire of the external 220V AC power supply. The output terminal of the glass tube fuse is connected to the live wire input terminal of the double-pole circuit breaker. The neutral wire input terminal of the double-pole circuit breaker is directly connected to the neutral wire of the external 220V AC power supply. The live wire output terminal of the double-pole circuit breaker serves as the live wire output terminal of the main power input module (3). The neutral wire output terminal of the double-pole circuit breaker serves as the neutral wire output terminal of the main power input module (3).
4. The electronically heated anti-fog glass panel according to claim 3, characterized in that, The main heating module (4) of the induction cooker includes a high-frequency coil, an IGBT power module, and a resonant capacitor; The first end of the high-frequency coil is connected to the live wire output terminal of the main power input module (3), the second end of the high-frequency coil is connected to the collector of the IGBT power module, the emitter of the IGBT power module is connected to one end of the resonant capacitor, the gate of the IGBT power module is used to connect to the drive signal output terminal of the induction cooker main control board, and the second end of the resonant capacitor is connected to the neutral wire output terminal of the main power input module (3).
5. An electronically heated anti-fog glass panel according to claim 4, characterized in that, The current detection and triggering module (5) includes a current transformer, a rectifier bridge, a filter capacitor, a Zener diode, and a MOSFET switch. The first end of the primary winding of the current transformer is connected to one end of the high-frequency coil in the main heating module (4) of the induction cooker. The second end of the primary winding of the current transformer is connected to the collector of the IGBT power module in the main heating module (4) of the induction cooker. The first end of the secondary winding of the current transformer is connected to the first AC input terminal of the rectifier bridge. The second end of the secondary winding of the current transformer is connected to the second AC input terminal of the rectifier bridge. The positive output terminal of the rectifier bridge is connected to the positive terminal of the filter capacitor, the cathode of the Zener diode, and the gate of the MOSFET switch. The negative output terminal of the rectifier bridge is connected to the negative terminal of the filter capacitor, the anode of the Zener diode, and the source of the MOSFET switch. The drain of the MOSFET switch is connected to the control terminal of the heating circuit switch module (6) in the anti-fog heating circuit.
6. The electronically heated anti-fog glass panel according to claim 5, characterized in that, The anti-fog electric heating circuit includes an electric heating circuit switch module (6) and an electric heating element and protection module (7). The control terminal of the electric heating circuit switch module (6) is connected to the output terminal of the current detection and triggering module (5), and the output terminal of the electric heating circuit switch module (6) is connected to the input terminal of the electric heating element and protection module (7).
7. An electronically heated anti-fog glass panel according to claim 6, characterized in that, The electric heating circuit switching module (6) includes a relay and a self-resetting fuse; The positive terminal of the relay coil is connected to the drain of the MOSFET switch, the negative terminal of the relay coil is grounded, the open contact input terminal of the relay is connected to the live wire output terminal of the main power input module (3), and the open contact output terminal of the relay is connected to the input terminal of the heating element and protection module (7) through a self-resetting fuse.
8. An electronically heated anti-fog glass panel according to claim 7, characterized in that, The heating element and protection module (7) includes a PTC heating film and a fusible thermal fuse; The second end of the self-resetting fuse is connected to one end of the fusible thermal fuse, the other end of the fusible thermal fuse is connected to the first electrode of the PTC heating film, the second electrode of the PTC heating film is connected to the neutral output terminal of the main power input module (3), and the PTC heating film is attached between the inner glass layer (2) and the outer glass layer (1).