Ignition rod driving device

Abstract

The utility model discloses an ignition rod driving device which comprises an ignition rod assembly, a switch module, a silicon controlled rectifier voltage regulating module and a control module, the ignition rod assembly, the switch module and the silicon controlled rectifier voltage regulating module are connected to form at least part of a driving branch, and the driving branch is used for being connected with a power supply. The control module is connected with the controlled end of the switch module so as to control the switch module to be switched on or switched off, the control module is connected with the silicon controlled voltage regulating module so as to control the heating power of the ignition rod assembly through the silicon controlled voltage regulating module, a transformer does not need to be additionally arranged for voltage reduction, operation is stable and reliable, and the service life of the ignition rod assembly is prolonged. The production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to an ignition rod driving device. Background Technology

[0002] Nowadays, gas water heaters and gas stoves on the market are gradually adopting a new type of igniter, namely silicon nitride igniter. The silicon nitride igniter uses a silicon nitride shell to cover the heating resistor. When the heating resistor is energized, it can heat the silicon nitride shell until it is red-hot, and then ignite the gas.

[0003] Existing silicon nitride igniters are typically available in two input voltage options: 120V and 230V. Due to the higher voltage of the 230V silicon nitride igniter, there are some safety design deficiencies in some gas equipment applications, such as insufficient creepage distance leading to insufficient withstand voltage and failure to pass safety inspections.

[0004] If a 120V silicon nitride ignition rod is installed in a device with an output voltage of 230V, the excessive heat will cause the 120V silicon nitride ignition rod to burn out. Therefore, in the past, it was necessary to add a transformer circuit to step down the 230V output voltage before powering the 120V silicon nitride ignition rod. However, transformers are relatively expensive, and the product cost is relatively high, which cannot meet the market demand. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an ignition rod driving device that is stable and reliable in operation and reduces production costs.

[0006] An ignition rod driving device according to a first aspect of the present invention includes an ignition rod assembly, a switch module, a silicon controlled rectifier (SCR) voltage regulating module, and a control module. The ignition rod assembly, the switch module, and the SCR voltage regulating module are connected to form at least a partial drive branch, which is used to connect to a power supply. The control module is connected to the controlled terminal of the switch module to control the switch module to turn on or off. The control module is also connected to the SCR voltage regulating module to control the heating power of the ignition rod assembly through the SCR voltage regulating module.

[0007] An ignition rod driving device according to an embodiment of the present utility model has at least the following beneficial effects:

[0008] This utility model relates to an ignition rod driving device. The control module outputs a duty cycle signal to the controlled terminal of the thyristor voltage regulating module. The thyristor voltage regulating module adjusts the operating current through the drive branch, thereby limiting the heating power of the ignition rod assembly. When connected to input power supplies of different voltage levels, it can also stabilize the heating power of the ignition rod assembly and prevent the ignition rod assembly from burning out. The control module controls the switch module to conduct, and the ignition rod assembly is energized and heated until it is red-hot, which can ignite gas or other substances. This design does not require the addition of a transformer to step down the voltage, and the operation is stable and reliable, reducing production costs.

[0009] According to some embodiments of the present invention, the thyristor voltage regulation module includes a semiconductor switching transistor Q3 and a thyristor SR1. The thyristor SR1 is connected to the ignition rod assembly to form at least part of the drive branch. The input terminal of the switching transistor Q3 is connected to the controlled terminal of the thyristor SR1 and the power supply, respectively. The control module is connected to the controlled terminal of the switching transistor Q3.

[0010] According to some embodiments of the present invention, the thyristor voltage regulation module further includes an optocoupler isolation unit. The positive terminal of the light emitter of the optocoupler isolation unit is connected to the power supply, the negative terminal of the light emitter of the optocoupler isolation unit is connected to the input terminal of the switching transistor Q3, the positive terminal of the light receiver of the optocoupler isolation unit is connected to the power supply, and the negative terminal of the light receiver of the optocoupler isolation unit is connected to the controlled terminal of the thyristor SR1.

[0011] According to some embodiments of the present invention, the thyristor voltage regulating module further includes a resistor R37 and a capacitor CX4, wherein the resistor R37 and the capacitor CX4 are connected in series to form at least a partial series branch, and the series branch is connected in parallel with the thyristor SR1.

[0012] According to some embodiments of the present invention, the switching module includes a semiconductor switching transistor Q1 and a relay unit REL1. The relay unit REL1 includes a relay switch and a relay coil. When the relay coil is energized, it can drive the relay switch to turn on or off. The relay switch and the ignition rod assembly are connected to form at least a partial drive branch. The relay coil is connected in series with the switching transistor Q1 to form at least a partial trigger branch. The trigger branch is used to connect to the power supply. The control module is connected to the controlled terminal of the switching transistor Q1.

[0013] According to some embodiments of the present invention, there are multiple ignition rod assemblies and multiple switch modules. The ignition rod assemblies and the switch modules are connected one-to-one to form at least a portion of the ignition switch branches. The thyristor voltage regulating module is connected to each ignition switch branch.

[0014] According to some embodiments of the present invention, the ignition rod driving device further includes a flame detection module, which is used to detect the presence of a flame and generate a flame signal. The flame detection module is connected to the control module.

[0015] According to some embodiments of the present invention, the ignition rod driving device further includes a timing module, which is used to generate a timing signal and is connected to the control module.

[0016] According to some embodiments of the present invention, the ignition rod driving device further includes a power detection module, which is connected to the ignition rod assembly to detect the operating power of the ignition rod assembly, and is connected to the control module.

[0017] According to some embodiments of the present invention, the power detection module includes a voltage detection module and a current detection module. The voltage detection module is connected to both ends of the ignition rod assembly to detect the operating voltage of the ignition rod assembly. The current detection module is connected to the ignition rod assembly to detect the operating current of the ignition rod assembly. The control module is connected to both the voltage detection module and the current detection module.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a block diagram illustrating the control principle of one embodiment of the ignition rod driving device of this utility model;

[0021] Figure 2 This is a circuit diagram of the drive branch of one embodiment of the ignition rod drive device of this utility model.

[0022] Figure label:

[0023] Ignition rod assembly 100; switch module 200; thyristor voltage regulation module 300; optocoupler isolation unit 310; control module 400; flame detection module 510; timing module 520; power detection module 600; voltage detection module 610; current detection module 620. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0028] like Figure 1 , 2 As shown, an ignition rod driving device according to a first aspect embodiment of the present invention includes an ignition rod assembly 100, a switch module 200, a thyristor voltage regulating module 300, and a control module 400. The ignition rod assembly 100, the switch module 200, and the thyristor voltage regulating module 300 are connected to form at least a partial drive branch, which is used to connect to a power supply. The control module 400 is connected to the controlled terminal of the switch module 200 to control the switch module 200 to turn on or off. The control module 400 is connected to the thyristor voltage regulating module 300 to control the heating power of the ignition rod assembly 100 through the thyristor voltage regulating module 300.

[0029] The ignition rod assembly 100 can be a silicon nitride ignition rod. The silicon nitride ignition rod uses a silicon nitride shell to cover the heating resistor. When the heating resistor is energized, it can heat the silicon nitride shell until it is red-hot, and then ignite the gas.

[0030] The control module 400 includes a processor such as an MCU or CPU and its auxiliary circuits. This design can be applied to gas appliances such as gas water heaters and gas stoves. The control module 400 can be electrically connected to the control buttons on the gas appliance. When the user operates the control buttons to generate an electrical signal, the control module 400 can control the switch module 200 to conduct and control the thyristor voltage regulating module 300 to drive the ignition rod assembly 100 to heat up.

[0031] This utility model relates to an ignition rod driving device. The control module 400 outputs a duty cycle signal to the controlled terminal of the thyristor voltage regulating module 300. The thyristor voltage regulating module 300 adjusts the operating current through the drive branch, thereby limiting the heating power of the ignition rod assembly 100. When connected to input power supplies of different voltage levels, it can also stabilize the heating power of the ignition rod assembly 100 and prevent the ignition rod assembly 100 from burning out. The control module 400 controls the switch module 200 to conduct, and the ignition rod assembly 100 is energized and heated until it is red-hot, which can ignite gas or other substances. This design does not require the addition of a transformer to step down the voltage, and the operation is stable and reliable, reducing production costs.

[0032] In some embodiments of this utility model, such as Figure 2 As shown, the thyristor voltage regulating module 300 includes a semiconductor switching transistor Q3 and a thyristor SR1. The thyristor SR1 is connected to the ignition rod assembly 100 to form at least part of the drive branch. The input terminal of the switching transistor Q3 is connected to the controlled terminal of the thyristor SR1 and the power supply, respectively. The control module 400 is connected to the controlled terminal of the switching transistor Q3.

[0033] The control module 400 outputs a duty cycle signal control command to the switching transistor Q3. The switching transistor Q3 amplifies the signal to improve the driving capability of the thyristor SR1. The thyristor SR1 turns on according to the duty cycle signal, forming a suitable operating current to provide to the drive branch.

[0034] In some embodiments of this utility model, the thyristor voltage regulating module 300 further includes an optocoupler isolation unit 310. The positive terminal of the light emitter of the optocoupler isolation unit 310 is connected to the power supply, the negative terminal of the light emitter of the optocoupler isolation unit 310 is connected to the input terminal of the switching transistor Q3, the positive terminal of the light receiver of the optocoupler isolation unit 310 is connected to the power supply, and the negative terminal of the light receiver of the optocoupler isolation unit 310 is connected to the controlled terminal of the thyristor SR1.

[0035] The optocoupler isolation unit 310 can be a conventional optocoupler. The optocoupler isolation unit 310 can shield interference signals on the drive branch side and prevent interference signals from intruding into the control module 400.

[0036] In some embodiments of this utility model, such as Figure 2 As shown, the thyristor voltage regulating module 300 also includes a resistor R37 and a capacitor CX4, wherein the resistor R37 and the capacitor CX4 are connected in series to form at least a partial series branch, and the series branch is connected in parallel with the thyristor SR1.

[0037] The series branch of resistor R37 and capacitor CX4 can limit the current, suppress the transient voltage across the thyristor, filter the input current, and achieve zero-point compensation.

[0038] In some embodiments of this utility model, the switch module 200 includes a semiconductor switch transistor Q1 and a relay unit REL1. The relay unit REL1 includes a relay switch and a relay coil. When the relay coil is energized, it can drive the relay switch to turn on or off. The relay switch and the ignition rod assembly 100 are connected to form at least a partial drive branch. The relay coil is connected in series with the switch transistor Q1 to form at least a partial trigger branch. The trigger branch is used to connect to the power supply. The control module 400 is connected to the controlled terminal of the switch transistor Q1.

[0039] The control module 400 outputs control commands to turn on the switch Q1, which energizes the trigger branch. The relay coil is energized and can attract the relay switch, causing the relay switch to close. When the relay switch is closed, the drive branch is turned on, and the ignition rod assembly 100 is energized and heats up. Specifically, the switch Q1 and switch Q3 can be transistors, MOSFETs, etc.

[0040] In some embodiments of this utility model, there are multiple ignition rod assemblies 100 and multiple switch modules 200. The ignition rod assemblies 100 and the switch modules 200 are connected one-to-one to form at least a portion of the ignition switch branches. The thyristor voltage regulating module 300 is connected to each ignition switch branch.

[0041] The thyristor voltage regulator module 300 modulates a suitable power supply voltage. When the user needs to control the heating of a certain ignition rod component 100, the corresponding switch module 200 is turned on by the control module 400, so that the corresponding ignition rod component 100 can be powered and heated.

[0042] In some embodiments of this utility model, such as Figure 1As shown, the ignition rod driving device also includes a flame detection module 510, which is used to detect the presence of a flame and generate a flame signal. The flame detection module 510 is connected to the control module 400.

[0043] The flame detection module 510 can be a conventional ionization sensor. When the gas is ignited by the ignition rod assembly 100, the flame detection module 510 detects the flame and generates a flame signal. The control module 400 controls the switch module 200 to turn off according to the flame signal, thereby stopping the operating current from passing through the ignition rod assembly 100 and improving the service durability.

[0044] In the early stages of flame formation, the flame may be unstable and easily extinguished. In some embodiments of this invention, the ignition rod driving device further includes a timing module 520. The timing module 520 is used to generate a timing signal. The timing module 520 is connected to the control module 400. The timing module 520 can be a conventional crystal oscillator circuit or a software timer. After receiving the flame signal, the control module 400 triggers the timing module 520 to start timing. When the timing time reaches the delay threshold, the control module 400 controls the switch module 200 to turn off. Thus, after the flame is generated and stabilized, the ignition rod assembly 100 stops heating, improving the ignition effect.

[0045] In some embodiments of this utility model, the ignition rod driving device further includes a power detection module 600, which is connected to the ignition rod assembly 100 to detect the operating power of the ignition rod assembly 100, and is connected to the control module 400.

[0046] During the operation of the ignition rod assembly 100, the power detection module 600 detects the operating power of the ignition rod assembly 100, and the control module 400 controls the operation of the thyristor voltage regulation module 300 according to the detected operating power to prevent the ignition rod assembly 100 from burning out due to excessive operating power.

[0047] In some embodiments of this utility model, the power detection module 600 includes a voltage detection module 610 and a current detection module 620. The voltage detection module 610 is connected to both ends of the ignition rod assembly 100 to detect the operating voltage of the ignition rod assembly 100. The current detection module 620 is connected to the ignition rod assembly 100 to detect the operating current of the ignition rod assembly 100. The control module 400 is connected to the voltage detection module 610 and the current detection module 620.

[0048] The voltage detection module 610 can be a resistive voltage sampling circuit. The voltage detection module 610 is connected to both ends of the ignition rod assembly 100 to detect the operating voltage of the ignition rod assembly 100. The current detection module 620 can be a resistive voltage divider circuit. The current detection module 620 is connected to the drive branch to sample the operating current to form a terminal voltage. The control module 400 analyzes the terminal voltage sampled by the current detection module 620 to obtain the operating current, and calculates the operating power by combining the operating voltage and the operating current.

[0049] In some embodiments of this utility model, the power detection module 600 can also be a conventional power meter, etc.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An igniter rod drive apparatus characterized by comprising: The ignition rod assembly, the switch module, the silicon controlled voltage regulating module and the control module are connected to form at least part of the driving branch, the driving branch is connected with the power supply, the control module is connected with the controlled end of the switch module to control the switch module to be on or off, and the control module is connected with the silicon controlled voltage regulating module to control the heating power of the ignition rod assembly through the silicon controlled voltage regulating module.

2. An igniter rod drive assembly according to claim 1, wherein: The silicon controlled voltage regulating module includes a semiconductor switch tube Q3 and a silicon controlled rectifier SR1, the silicon controlled rectifier SR1 is connected with the ignition rod assembly to form at least part of the driving branch, the input end of the switch tube Q3 is connected with the controlled end of the silicon controlled rectifier SR1 and the power supply respectively, and the control module is connected with the controlled end of the switch tube Q3.

3. An igniter rod drive as defined in claim 2 wherein: The silicon controlled voltage regulating module further includes an optical coupling isolation unit, the positive electrode of the light emitter of the optical coupling isolation unit is connected with the power supply, the negative electrode of the light emitter of the optical coupling isolation unit is connected with the input end of the switch tube Q3, the positive electrode of the light receiver of the optical coupling isolation unit is connected with the power supply, and the negative electrode of the light receiver of the optical coupling isolation unit is connected with the controlled end of the silicon controlled rectifier SR1.

4. An igniter rod drive assembly according to claim 2, wherein: The silicon controlled voltage regulating module further includes a resistor R37 and a capacitor CX4, the resistor R37 and the capacitor CX4 are connected in series to form at least part of the series branch, and the series branch is connected with the silicon controlled rectifier SR1 in parallel.

5. An igniter rod drive assembly according to claim 1 wherein: The switch module includes a semiconductor switch tube Q1 and a relay unit REL1, the relay unit REL1 includes a relay switch and a relay coil, the relay coil is energized to drive the relay switch to be on or off, the relay switch and the ignition rod assembly are connected to form at least part of the driving branch, the relay coil is connected with the switch tube Q1 in series to form at least part of the trigger branch, the trigger branch is connected with the power supply, and the control module is connected with the controlled end of the switch tube Q1.

6. An igniter rod drive assembly according to claim 1 wherein: The ignition rod assembly has a plurality of ignition rod assemblies, the switch module has a plurality of switch modules, and the ignition rod assembly and the switch module are connected one by one to form at least part of the ignition switch branch, and the silicon controlled voltage regulating module is connected with each ignition switch branch.

7. An igniter rod drive assembly according to claim 1 wherein, The flame detection module is further included, the flame detection module is used for detecting whether there is flame to form a flame signal, and the flame detection module is connected with the control module.

8. An igniter rod drive assembly according to claim 7, wherein, The timing module is further included, the timing module is used for forming a timing signal, and the timing module is connected with the control module.

9. An igniter rod drive assembly according to claim 1 wherein, The power detection module is further included, the power detection module is connected with the ignition rod assembly to detect the operating power of the ignition rod assembly, and the power detection module is connected with the control module.

10. An igniter rod drive assembly according to claim 9, wherein, The power detection module comprises a voltage detection module and a current detection module, the voltage detection module is connected with two ends of the ignition rod assembly respectively to detect the operating voltage of the ignition rod assembly, the current detection module is connected with the ignition rod assembly to detect the operating current of the ignition rod assembly, and the control module is connected with the voltage detection module and the current detection module respectively.

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