Method for improving electromagnetic compatibility performance of integrated stove and electrical structure and integrated stove

Abstract

The present invention discloses a method, electrical structure, and integrated stove for improving the electromagnetic compatibility of an integrated stove. The method comprises: each coil winding of a solenoid valve that controls the gas flow of the stove is connected to a pair of conductive pins, with one positive pin and one negative pin in each pair, and the negative pin is not electrically connected to the solenoid valve housing. The solenoid valve has at least one pair of pins for connecting to the stove's thermoelectric potential, and another pair for connecting to the stove's ignition and valve closing operations. The negative pin of one pair of pins of the solenoid valve is connected to the stove's pulse igniter via a GND line. This method reduces interference with the integrated stove caused by high-voltage pulses output during ignition, thereby improving the reliability of the entire control system.

Description

Technical Field

[0001] The present application relates to the field of electrical control technology for integrated stoves, and in particular to a method for improving the electromagnetic compatibility performance of an integrated stove, an electrical structure, and an integrated stove. Background Art

[0002] As a smart kitchen appliance, an integrated stove not only functions as a cooking mechanism but also includes an electronic control system. This system generally consists of a control subsystem centered around a power board and an ignition subsystem. The control subsystem primarily comprises the power board, display panel (controller), and loads such as heating elements, heating plates, lighting, and a fan. The ignition subsystem primarily consists of a pulse igniter, an ignition needle, a dual-coil solenoid valve (for integrated stove air output control), a microswitch, and a thermocouple.

[0003] The above-mentioned systems are closely linked to each other. Some electronic devices may generate electromagnetic interference to other devices or systems during operation. For example, high-voltage pulses during ignition may cause system malfunction, which affects the reliability of the entire electronic control system. Therefore, this application proposes a new technical solution. Summary of the Invention

[0004] The purpose of this application is to provide a method for improving the electromagnetic compatibility performance of an integrated stove, an electrical structure, and an integrated stove.

[0005] In the first aspect, the present application provides a method for improving the electromagnetic compatibility performance of an integrated stove, using the following technical solution:

[0006] A method for improving the electromagnetic compatibility performance of an integrated stove, comprising:

[0007] The return ends of each coil winding of the solenoid valve that controls the gas output of the cooker are output as a pair of conductive pins, and the pins in the same pair are one positive pin and one negative pin, and the negative pin is not conductive to the solenoid valve housing;

[0008] The solenoid valve has at least one pair of pins used as the thermoelectric potential connection of the stove, and one pair of pins used as the ignition and valve closing action connection of the stove;

[0009] The negative pin of a pair of pins of the solenoid valve is connected to the pulse igniter of the cooker through a GND line.

[0010] Optionally, the igniter interface of the power board of the cooker is connected to the igniter of the cooker via an electrical isolation element.

[0011] Optionally, the electrical isolation element includes an optocoupler element.

[0012] Optionally, the display panel / control panel interface of the stove power board is connected with a four-core wire, and the outer shielding layer of the four-core wire is connected to the bottom line of the stove housing or the power board;

[0013] Among them, the four cores of the four-core cable are independent RX line, TX line, power line and GND line respectively.

[0014] In a second aspect, the present application provides an electrical structure for improving the electromagnetic compatibility performance of an integrated stove, using the following technical solutions:

[0015] An electrical structure for improving the electromagnetic compatibility performance of an integrated stove, comprising:

[0016] The power board, which is the electrical component of the cooker;

[0017] The igniter is connected to the igniter interface of the power board and has one terminal for outputting the ignition maintenance voltage, one terminal for the maintenance voltage GND terminal, and two terminals for connecting the common terminal and the normally open terminal / normally closed terminal of the micro switch respectively;

[0018] The solenoid valve is a gas control valve for a stove. It has at least two coils, and the return end of each coil winding is output as a pair of conductive pins. The pins in the same pair are one positive pin and one negative pin, and the negative pin is not conductive to the solenoid valve housing.

[0019] The solenoid valve has at least one pair of pins used as the thermoelectric potential connection of the stove, and one pair of pins used as the ignition and valve closing action connection of the stove;

[0020] Connect the negative pin of a pair of pins of the solenoid valve to the maintenance voltage GND terminal of the igniter.

[0021] Optionally, the igniter interface of the power board is configured with an electrical isolation element connected to the igniter.

[0022] Optionally, the electrical isolation element includes an optocoupler element.

[0023] Optionally, the power board has a display board / control board interface and is connected to a four-core wire, the four-core wire is provided with an external shielding layer, and the shielding layer is connected to the housing of the cooker or the bottom line of the power board;

[0024] The four cores of the four-core wire are respectively independent RX wire, TX wire, power wire and GND wire.

[0025] In a third aspect, the present application provides an integrated stove, which adopts the following technical solution:

[0026] An integrated stove includes a body and an electronic control system, wherein the electronic control system is improved by applying any of the above-mentioned methods for improving the electromagnetic compatibility performance of the integrated stove.

[0027] To sum up, the present application includes at least one of the following beneficial technical effects: through the design in which each coil of the multi-coil solenoid valve is output in the form of a pin, the ignition power ground and the control ground are electrically insulated and isolated from the solenoid valve housing and the casing ground, and the floating ground design of the control subsystem control ground is realized, cutting off the interference path and potential path of the ignition high-voltage pulse on the control subsystem, thereby eliminating the influence of the high-voltage pulse output when the ignition is ignited on the casing discharge and the control system, and improving the reliability of the integrated stove grounding system and the electromagnetic compatibility of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the electrical schematic diagram of this application;

[0029] Figure 2 This is a four-core wire wiring diagram of this application. Implementation Method

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] In this application, the integrated stove takes the left and right double stove model as an example. When explaining the electrical structure below, only the left stove is taken for illustration.

[0032] The embodiments of the present application disclose a method for improving the electromagnetic compatibility performance of an integrated stove, an electrical structure, and an integrated stove.

[0033] Reference Figure 1 Methods to improve the electromagnetic compatibility performance of integrated stoves include:

[0034] The return ends of each coil winding of the solenoid valve that controls the gas output of the cooker are output as a pair of conductive pins, and the pins of the same pair include a positive pin and a negative pin, and the negative pin is not conductive to the solenoid valve housing.

[0035] In this embodiment, a dual-coil solenoid valve is taken as an example: one coil is a main coil, and the other coil is a secondary coil.

[0036] Among them, the pins of the main coil of the solenoid valve are used as the thermoelectric potential wiring of the cooker, that is, the positive pin is connected to the output of the thermocouple, and the negative pin is connected to the ground of the thermocouple to form a thermoelectric potential working circuit.

[0037] The pins of the auxiliary coil of the solenoid valve are used as the wiring for the ignition and valve closing of the stove. Figure 2 For example:

[0038] The (pulse) igniter connects the positive pin of the secondary coil with a purple wire, outputs (zero-second) ignition maintenance voltage to the secondary coil of the solenoid valve, and connects the negative pole of the secondary coil with a GND wire;

[0039] At the same time, the power board is connected to the positive pin of the secondary coil with a purple wire to output the valve closing signal to the secondary coil of the solenoid valve, and is connected to the negative pole of the secondary coil with a black wire (0Ω directly grounded inside the power board).

[0040] It's important to note that in this application, the negative pin is designed to be disconnected from the solenoid valve housing. This is because the conventional solenoid valve power return line is connected to the housing ground through the housing, thus mixing all the power grounds of the cooktop. Furthermore, the aforementioned purple and black wires are conductors, and their colors reflect the color scheme used for real-world wires and cables, so they will not be further described.

[0041] According to the above settings, the independent connection of the thermoelectric potential working circuit and the zero-second ignition working circuit and the valve closing action working circuit is realized, and the electrical insulation isolation design of the ignition power ground and the control ground and the solenoid valve housing is realized. Because the solenoid valve housing is connected to the casing ground, it is equivalent to realizing the electrical insulation isolation design of the ignition power ground and the control ground and the casing ground, thereby cutting off the interference path and potential path of the ignition high-voltage pulse to the control subsystem to a certain extent, and reducing the impact of the high-voltage pulse output when the igniter ignites on the casing discharge and the control system.

[0042] In one embodiment of the present method, an igniter interface of a power board of the cooker is connected to an igniter of the cooker via an electrical isolation element.

[0043] There are many ways to implement the above electrical isolation components, such as:

[0044] 1) Optocoupler element, which is used to achieve photoelectric isolation between the igniter and the power board.

[0045] 2) Pulse transformer to achieve signal isolation; it is understandable that if a pulse transformer is used, it needs to be equipped with shaping filter and adaptive selection should be made according to the type of electrical signal.

[0046] This application gives priority to optical coupler elements because they have a simpler structure and are relatively more convenient to use.

[0047] According to the above configuration, the igniter can be further electrically isolated from the power board, thereby reducing the impact of the ignition high-voltage pulse on the control subsystem.

[0048] In one embodiment of this method, considering that existing control subsystems do not distinguish between power ground and shield ground in the connection cables between the power board and the display board or other communication boards, a three-core shielded cable is designed. Specifically, the three cores serve as the (5V) power line and the TX and RX serial port signal lines, while the peripheral device's shield layer serves as the power return line (i.e., control ground). Although this generally has no impact on electrical functionality, the following applies:

[0049] When there is interference in the external environment (especially when the ignition high-voltage pulse of the present application discharges to the casing), it will not only fail to play a shielding role, but will increase the electromagnetic interference to the control subsystem.

[0050] Therefore, this method further makes the following settings:

[0051] like Figure 2 As shown, the display panel / control panel interface of the stove power board is connected with a four-core cable, and the four-core cable is provided with an external shielding layer (similar to the shielding layer of the original three-core shielded cable), and the shielding layer is connected to the bottom line of the stove casing or the power board; wherein, the four cores of the four-core cable are independent RX line, TX line, (5V) power line and (5V) GND line.

[0052] When there is an interference signal, the interference signal is directly discharged to the chassis ground through the shielding layer, thereby reducing the interference to the control system and improving the electromagnetic compatibility of the control system.

[0053] In summary, this method optimizes the grounding system design of the integrated stove, achieves effective isolation of the control ground from the ignition power ground and the casing ground, and can reduce interference with the control subsystem caused by high-voltage pulse interference or static electricity during ignition.

[0054] The embodiment of the present application also discloses an electrical structure for improving the electromagnetic compatibility performance of the integrated stove.

[0055] Reference Figure 1 The electrical structure that improves the electromagnetic compatibility performance of the integrated stove includes:

[0056] The power board, which is the electrical component of the cooker (control subsystem);

[0057] (Pulse) igniter, which is connected to the igniter interface of the power board, and has one terminal (purple wire) used to output the ignition maintenance voltage, one terminal used as the maintenance voltage GND terminal, and two terminals (yellow wire and black wire) connected to the common terminal and normally open terminal / normally closed terminal of the micro switch respectively;

[0058] The solenoid valve is a gas control valve for a stove. It has at least two coils, and the return end of each coil winding is output as a pair of conductive pins. The pins in the same pair include one positive pin and one negative pin, and the negative pin is not conductive to the solenoid valve housing.

[0059] In this embodiment, a dual-coil solenoid valve is taken as an example: one coil is a main coil, and the other coil is a secondary coil.

[0060] Among them, the pins of the main coil of the solenoid valve are used as the thermoelectric potential wiring of the cooker, that is, the positive pin is connected to the output of the thermocouple, and the negative pin is connected to the ground of the thermocouple to form a thermoelectric potential working circuit.

[0061] The pins of the auxiliary coil of the solenoid valve are used as the wiring for the ignition and valve closing of the stove. Figure 2 For example:

[0062] Connect the purple wire of the (pulse) igniter to the positive pin of the secondary coil, output the (zero-second) ignition maintenance voltage to the secondary coil of the solenoid valve, and connect the GND wire to the negative pole of the secondary coil;

[0063] At the same time, the power board is connected to the positive pin of the secondary coil with a purple wire to output the valve closing signal to the secondary coil of the solenoid valve, and is connected to the negative pole of the secondary coil with a black wire (0Ω directly grounded inside the power board).

[0064] According to the above settings, the independent connection of the thermoelectric potential working circuit and the zero-second ignition working circuit and the valve closing action working circuit is realized, and the electrical insulation isolation design of the ignition power ground and the control ground and the solenoid valve housing is realized. Because the solenoid valve housing is connected to the casing ground, it is equivalent to realizing the electrical insulation isolation design of the ignition power ground and the control ground and the casing ground, thereby cutting off the interference path and potential path of the ignition high-voltage pulse to the control subsystem to a certain extent, and reducing the impact of the high-voltage pulse output when the igniter ignites on the casing discharge and the control system.

[0065] In one embodiment of this structure, the igniter interface of the power board is configured with an electrical isolation element to connect with the igniter.

[0066] At the same time, the design of using the shielding layer as the power return line in the existing connection line between the power board and the display board is optimized. Specifically:

[0067] like Figure 2 , use a four-core shielded cable, the four cores of the four-core cable are independent RX line, TX line, power line and GND line respectively; therefore, the optimization is to use independent wires for the power line and the power return line, and the shielding layer is connected to the chassis nearby or connected to the chassis ground on the power board.

[0068] Under the above premise, when there is an interference signal, the interference signal is directly discharged to the chassis ground through the shielding layer, thereby reducing the interference to the control system and improving the electromagnetic compatibility of the control system.

[0069] The embodiments of the present application also disclose an integrated stove.

[0070] An integrated stove includes a body and an electronic control system, wherein the electronic control system is improved using any of the above-mentioned methods for improving the electromagnetic compatibility performance of the integrated stove.

[0071] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for improving the electromagnetic compatibility performance of an integrated stove, characterized in that: include: The return ends of each coil winding of the solenoid valve that controls the gas output of the cooker are output as a pair of conductive pins, and the pins in the same pair are one positive pin and one negative pin, and the negative pin is not conductive to the solenoid valve housing; The solenoid valve has at least one pair of pins used as the thermoelectric potential connection of the stove, and one pair of pins used as the ignition and valve closing action connection of the stove; The negative pin of a pair of pins of the solenoid valve is connected to the pulse igniter of the cooker via a GND line; Among them, the solenoid valve has two coils, one coil is the main coil and the other coil is the auxiliary coil; The pins of the main coil of the solenoid valve are used as the thermoelectric potential wiring of the stove, that is, the positive pin is connected to the output of the thermocouple, and the negative pin is connected to the ground of the thermocouple to form a thermoelectric potential working circuit; The pins of the secondary coil of the solenoid valve are used as the wiring for the ignition and valve closing actions of the stove. Among them, the pulse igniter is connected to the positive pin of the secondary coil, outputs the ignition maintenance voltage to the secondary coil of the solenoid valve, and connects the negative pole of the secondary coil with the GND line.

2. The method for improving the electromagnetic compatibility performance of an integrated stove according to claim 1, characterized in that: The igniter interface of the power board of the cooker is connected to the igniter of the cooker through an electrical isolation element.

3. The method for improving the electromagnetic compatibility performance of an integrated stove according to claim 2, characterized in that: The electrical isolation element includes an optocoupler element.

4. The method for improving the electromagnetic compatibility performance of an integrated stove according to claim 1, characterized in that: Use a four-core cable to connect the display panel / control panel interface of the stove's power board, and connect the outer shield layer of the four-core cable to the stove's housing or the bottom line of the power board. Among them, the four cores of the four-core cable are independent RX line, TX line, power line and GND line respectively.

5. An electrical structure for improving the electromagnetic compatibility performance of an integrated stove, characterized by: The power board, which is the electrical component of the cooker; The igniter is connected to the igniter interface of the power board and has one terminal for outputting the ignition maintenance voltage, one terminal for the maintenance voltage GND terminal, and two terminals for connecting the common terminal and the normally open terminal / normally closed terminal of the micro switch respectively; The solenoid valve is a gas control valve for a stove. It has at least two coils, and the return end of each coil winding is output as a pair of conductive pins. The pins in the same pair are one positive pin and one negative pin, and the negative pin is not conductive to the solenoid valve housing. The solenoid valve has at least one pair of pins used as the thermoelectric potential connection of the stove, and one pair of pins used as the ignition and valve closing action connection of the stove; Connect the negative pin of a pair of pins of the solenoid valve to the maintenance voltage GND terminal of the igniter; Among them, the solenoid valve has two coils, one coil is the main coil and the other coil is the auxiliary coil; The pins of the main coil of the solenoid valve are used as the thermoelectric potential wiring of the stove, that is, the positive pin is connected to the output of the thermocouple, and the negative pin is connected to the ground of the thermocouple to form a thermoelectric potential working circuit; The pins of the secondary coil of the solenoid valve are used as the wiring for the ignition and valve closing actions of the stove. Among them, the pulse igniter is connected to the positive pin of the secondary coil, outputs the ignition maintenance voltage to the secondary coil of the solenoid valve, and connects the negative pole of the secondary coil with the GND line.

6. The electrical structure for improving the electromagnetic compatibility of an integrated stove according to claim 5, characterized in that: The igniter interface of the power board is configured with an electrical isolation element and is connected to the igniter.

7. The electrical structure for improving the electromagnetic compatibility of an integrated stove according to claim 6, characterized in that: The electrical isolation element includes an optocoupler element.

8. The electrical structure for improving the electromagnetic compatibility of an integrated stove according to claim 5, characterized in that: The power board has a display board / control board interface and is connected to a four-core wire. The four-core wire is provided with a shielding layer, and the shielding layer is connected to the bottom line of the housing of the cooker or the power board. The four cores of the four-core wire are respectively independent RX wire, TX wire, power wire and GND wire.

9. An integrated stove, comprising a body and an electronic control system, characterized in that: The electronic control system is improved by using the method for improving the electromagnetic compatibility performance of the integrated stove as described in any of claims 1-4 above.

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