Gas ignition control circuit for commercial kitchen ware

Abstract

The utility model relates to the technical field of gas ignition, and discloses a commercial kitchen ware gas ignition control circuit which comprises a power supply module used for supplying power; the ignition control module is used for receiving the electric energy output by the power supply module and generating spark discharge; the gas valve control module is used for controlling the opening of a gas valve when the ignition control module generates spark discharge; the flame detection module is used for flame detection and controlling the automatic ignition control module to transmit electric energy to the ignition control module when no flame is detected; and the timing control module is used for setting a timing duration and closing the gas valve by the gas valve control module when the working duration of the automatic ignition control module exceeds the timing duration. According to the gas ignition control circuit for the commercial kitchen ware, the gas valve is opened, ignition work is completed and flames are detected while spark discharge is generated, spark discharge is generated again if ignition is not successful, and the gas valve is automatically closed if the spark discharge period exceeds the timing duration.

Description

Technical Field

[0001] The utility model relates to the technical field of gas ignition, in particular to a gas ignition control circuit for commercial kitchen appliances. Background Art

[0002] Commercial kitchenware is a kind of kitchen equipment or tools used for commercial purposes or for cooking, such as gas stoves. In the prior art, the start and stop and firepower adjustment of commercial gas stoves are all achieved by purely mechanical buttons and regulating valves, which require manual control by the chef. In addition, when the chef ignites the fire for the first time, he may neglect to notice that the gas is not ignited after the fire is ignited. Since the gas stove cannot ignite automatically, the gas remains in a released state, which poses certain safety hazards and needs to be improved. Utility Model Content

[0003] The embodiment of the utility model provides a commercial kitchen appliance gas ignition control circuit to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A commercial kitchen gas ignition control circuit, comprising: a power supply module, an ignition control module, a gas valve control module, a flame detection module, an automatic ignition control module and a timing control module;

[0006] A power module, used for receiving AC power, reducing the voltage of the AC power, rectifying the AC power, and outputting the first power;

[0007] an ignition control module, connected to the power module, for receiving the first electric energy output by the power module, performing voltage conversion, boosting and rectification on the first electric energy output by the power module and storing the rectified electric energy, and generating spark discharge when the stored electric energy is greater than a set discharge threshold;

[0008] a gas valve control module, connected to the power module and the ignition control module, for receiving the first electric energy output by the power module and self-lockingly outputting a first control signal when receiving the first electric energy input to the ignition control module, and controlling the opening of the gas valve through the first control signal;

[0009] a flame detection module, connected to the power supply module, and configured to receive the first electric energy and detect the flame, and output a third control signal in a high level state when no flame is detected, and output a second control signal in a low level state when a flame is detected;

[0010] An automatic ignition control module, connected to the power module, the flame detection module, the gas valve control module and the ignition control module, and configured to transmit the first electric energy to the ignition control module when receiving the third control signal in a high level state and the first control signal;

[0011] The timing control module is connected to the power module, the brake ignition control module and the gas valve control module, and is used to set the timing duration and control the resetting of the gas valve control module to close the gas valve when the duration of receiving the third control signal in the high level state exceeds the timing duration.

[0012] As a further solution of the utility model: the power module includes a power interface, a first transformer and a first rectifier; the gas valve control module includes a first relay switch and a gas valve device;

[0013] Preferably, the first end of the power interface is connected to the moving end of the first relay switch and the first end of the primary side of the first transformer, the second end of the power interface is connected to the first end of the gas valve device and the second end of the primary side of the first transformer, the fixed end of the first relay switch is connected to the second end of the gas valve device, the first end and the second end of the secondary side of the first transformer are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the ignition control module, the gas valve control module, the flame detection module, the automatic ignition control module and the timing control module, and the fourth end of the first rectifier is grounded.

[0014] As a further solution of the utility model: the ignition control module includes a first key switch, a second capacitor, a fifth resistor, a fifth switch tube, a second transformer, a third diode, a sixth resistor, a third capacitor, a first trigger diode, a first thyristor, a fourth capacitor, a third transformer and an igniter;

[0015] Preferably, the fixed end of the first key switch is connected to the third end of the first rectifier, the base of the fifth switch tube is connected to the first end of the first primary of the second transformer, the moving end of the first key switch is connected to the emitter of the fifth switch tube and connected to the second end of the first primary of the second transformer and one end of the fifth resistor through the second capacitor, the collector of the fifth switch tube is connected to the first end of the second primary of the second transformer, the other end of the fifth resistor is connected to the second end of the second primary and the ground, the first end of the secondary side of the second transformer is connected to the anode of the third diode, the cathode of the third diode is connected to one end of the fourth capacitor and the anode of the first thyristor and connected to one end of the first trigger diode and one end of the third capacitor through the sixth resistor, the other end of the first trigger diode is connected to the control end of the first thyristor, the other end of the fourth capacitor is connected to the first end of the primary of the third transformer, the second end of the secondary side of the second transformer is connected to the other end of the third capacitor, the cathode of the first thyristor and the second end of the primary of the third transformer, and the first end and the second end of the secondary side of the third transformer are respectively connected to the first end and the second end of the igniter.

[0016] As a further solution of the utility model: the gas valve control module also includes a third resistor, a fourth resistor, a first diode, a second diode, a first logic chip, a first switch tube and a first relay;

[0017] Preferably, the A end of the first logic chip is connected to one end of the first relay and the third end of the first rectifier through a third resistor, the B end of the first logic chip is connected to the cathode of the first diode and the cathode of the second diode, the anode of the first diode is connected to the moving end of the first key switch through a fourth resistor, the anode of the second diode is connected to the F end of the first logic chip and the base of the first switch tube, the emitter of the first switch tube is grounded, and the collector of the first switch tube is connected to the other end of the first relay.

[0018] As a further solution of the utility model: the automatic ignition control module includes a second logic chip, a second switch tube, a second relay and a second relay switch;

[0019] Preferably, the A end of the second logic chip is connected to the flame detection module, the B end of the second logic chip is connected to the F end of the first logic chip, the F end of the second logic chip is connected to the base of the second switch tube, the emitter of the second switch tube is grounded, the collector of the second switch tube is connected to one end of the second relay, the other end of the second relay is connected to the third end of the first rectifier and the fixed end of the second relay switch, and the moving end of the second relay switch is connected to the emitter of the fifth switch tube.

[0020] As a further solution of the utility model: the flame detection module includes a seventh resistor, a fourth diode, an eighth resistor, a ninth resistor, a first potentiometer, a first comparator and a first sensor;

[0021] Preferably, the cathode of the fourth diode is connected to one end of the eighth resistor and one end of the ninth resistor and is connected to the third end of the first rectifier through the seventh resistor, the other end of the eighth resistor is connected to the in-phase end of the first comparator and the second end of the first sensor, the other end of the ninth resistor is connected to one end of the first potentiometer, the inverting end of the first comparator is connected to the slider end of the first potentiometer, the other end of the first potentiometer, the first end of the first sensor and the anode of the fourth diode are all connected to the fourth end of the first rectifier and the ground, and the output end of the first comparator is connected to the A end of the second logic chip.

[0022] As a further solution of the utility model: the timing control module includes a third switch tube, a first capacitor, a first resistor, a second resistor and a fourth switch tube;

[0023] Preferably, the base of the third switching tube is connected to the F end of the second logic chip, the emitter of the third switching tube is connected to one end of the first capacitor and one end of the first resistor and is connected to the base of the fourth switching tube through the second resistor, the emitter of the fourth switching tube is connected to the base, the collector of the fourth switching tube is connected to the A end of the first logic chip, the other end of the first capacitor and the other end of the first resistor are both grounded, and the collector of the third switching tube is connected to the third end of the first rectifier.

[0024] Compared with the prior art, the beneficial effects of the utility model are as follows: the commercial kitchen gas ignition control circuit of the utility model processes the first electric energy output by the power supply module and generates spark discharge by the ignition control module, and controls the opening of the gas valve by the gas valve control module, and then completes the ignition work, and the flame detection module performs flame detection at the same time. If the ignition is not successful, the ignition control module is controlled to be energized and generate spark discharge, and the timing control module starts timing. If the timing time is exceeded and the ignition work is still not successfully completed, the gas valve control module is controlled to close the gas valve, so as to realize the automatic ignition work of the gas ignition control circuit, and improve the intelligence and safety of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 The utility model provides a principle block diagram of a commercial kitchen gas ignition control circuit.

[0027] Figure 2 The utility model provides a circuit diagram of a commercial kitchen gas ignition control circuit.

[0028] Figure 3 This is a connection circuit diagram of a flame detection module provided in an example of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In one embodiment, see Figure 1The utility model provides a commercial kitchen gas ignition control circuit, comprising: a power supply module 1, an ignition control module 2, a gas valve control module 3, a flame detection module 4, an automatic ignition control module 5 and a timing control module 6;

[0031] Specifically, the power module 1 is used to receive AC power, and to perform voltage reduction and rectification processing on the AC power and output the first power;

[0032] an ignition control module 2, connected to the power module 1, for receiving the first electric energy output by the power module 1, performing voltage conversion, boosting and rectification on the first electric energy output by the power module 1 and storing the rectified electric energy, and generating spark discharge when the stored electric energy is greater than a set discharge threshold;

[0033] The gas valve control module 3 is connected to the power module 1 and the ignition control module 2, and is used to receive the first electric energy output by the power module 1 and to self-lock and output a first control signal when receiving the first electric energy input to the ignition control module 2, and to control the opening of the gas valve through the first control signal;

[0034] The flame detection module 4 is connected to the power supply module 1, and is used to receive the first electric energy and detect the flame, and output a third control signal in a high level state when no flame is detected, and output a second control signal in a low level state when a flame is detected;

[0035] An automatic ignition control module 5, connected to the power module 1, the flame detection module 4, the gas valve control module 3 and the ignition control module 2, for transmitting the first electric energy to the ignition control module 2 when receiving the third control signal in a high level state and the first control signal;

[0036] The timing control module 6 is connected to the power module 1, the brake ignition control module 2 and the gas valve control module 3, and is used to set the timing duration and control the resetting work of the gas valve control module 3 to close the gas valve when the duration of receiving the third control signal in the high level state exceeds the timing duration.

[0037] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface, a transformer and a rectifier, can connect to AC power and perform voltage reduction and rectification on the AC power; the ignition control module 2 can adopt an ignition control circuit composed of a transformer, a triode, a capacitor, an igniter, etc., can perform voltage conversion, boost, rectification and discharge control on the input electric energy and generate spark discharge; the gas valve control module 3 can adopt a gas valve control circuit composed of a logic chip, a relay, a gas valve device, etc., can perform signal logic calculation, specifically, when the ignition control module 2 is working, the self-locking outputs a signal in a high level state, and then controls the opening of the gas valve; the flame detection module 4 can adopt a flame sensor, a comparator, The flame detection circuit composed of resistors, etc. can detect the flame and output a signal in a high-level state when no flame is detected, and output a signal in a low-level state when a flame is detected; the automatic ignition control module 5 can adopt an automatic ignition control circuit composed of logic chips, transistors, relays, etc., and control the electric energy input to the ignition control module 2 when the flame detection module 4 does not detect the flame; the timing control module 6 can adopt a timing control circuit composed of transistors, capacitors and resistors, and the capacitor stores energy. When the stored electric energy reaches the conduction voltage of the transistor, the conduction of the transistor is controlled. The time from capacitor energy storage to transistor conduction is the timing time. When the timing time is exceeded, the gas valve control module 3 is controlled to reset.

[0038] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the power module 1 includes a power interface, a first transformer B1 and a first rectifier T1; the gas valve control module 3 includes a first relay switch K1-1 and a gas valve device;

[0039] Specifically, the first end of the power interface is connected to the moving end of the first relay switch K1-1 and the first end of the primary side of the first transformer B1, the second end of the power interface is connected to the first end of the gas valve device and the second end of the primary side of the first transformer B1, the fixed end of the first relay switch K1-1 is connected to the second end of the gas valve device, the first end and the second end of the secondary side of the first transformer B1 are respectively connected to the first end and the second end of the first rectifier T1, the third end of the first rectifier T1 is connected to the ignition control module 2, the gas valve control module 3, the flame detection module 4, the automatic ignition control module 5 and the timing control module 6, and the fourth end of the first rectifier T1 is grounded.

[0040] In a specific embodiment, the first relay switch K1-1 can be a normally open switch; the gas valve device can be composed of a gas valve, which opens when power is supplied and closes when power is lost.

[0041] Further, the ignition control module 2 includes a first key switch S1, a second capacitor C2, a fifth resistor R5, a fifth switch tube V5, a second transformer B2, a third diode D3, a sixth resistor R6, a third capacitor C3, a first trigger diode VD1, a first thyristor VS1, a fourth capacitor C4, a third transformer B3 and an igniter;

[0042] Specifically, the fixed end of the first key switch S1 is connected to the third end of the first rectifier T1, the base of the fifth switch tube V5 is connected to the first end of the first primary side of the second transformer B2, the moving end of the first key switch S1 is connected to the emitter of the fifth switch tube V5 and connected to the second end of the first primary side of the second transformer B2 and one end of the fifth resistor R5 through the second capacitor C2, the collector of the fifth switch tube V5 is connected to the first end of the second primary side of the second transformer B2, the other end of the fifth resistor R5 is connected to the second end of the second primary side and the ground, the first end of the secondary side of the second transformer B2 is connected to the anode of the third diode D3, and the third diode The cathode of D3 is connected to one end of the fourth capacitor C4 and the anode of the first thyristor VS1, and is connected to one end of the first trigger diode VD1 and one end of the third capacitor C3 through the sixth resistor R6. The other end of the first trigger diode VD1 is connected to the control end of the first thyristor VS1. The other end of the fourth capacitor C4 is connected to the first end of the primary side of the third transformer B3. The second end of the secondary side of the second transformer B2 is connected to the other end of the third capacitor C3, the cathode of the first thyristor VS1 and the second end of the primary side of the third transformer B3. The first end and the second end of the secondary side of the third transformer B3 are connected to the first end and the second end of the igniter respectively.

[0043] In a specific embodiment, the first push button switch S1 can be a click switch; the fifth switch tube V5, the second capacitor C2, the fifth resistor R5 and the second transformer B2 step up the input first electric energy and output it in the form of alternating current; the first trigger diode VD1 sets a discharge threshold, and when the electric energy stored in the third capacitor C3 exceeds the discharge threshold, the first trigger diode VD1 is turned on; the first thyristor VS1 can be a unidirectional thyristor.

[0044] Furthermore, the gas valve control module 3 also includes a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a first logic chip J1, a first switch tube V1 and a first relay K1;

[0045] Specifically, the A end of the first logic chip J1 is connected to one end of the first relay K1 and the third end of the first rectifier T1 through the third resistor R3, the B end of the first logic chip J1 is connected to the cathode of the first diode D1 and the cathode of the second diode D2, the anode of the first diode D1 is connected to the moving end of the first key switch S1 through the fourth resistor R4, the anode of the second diode D2 is connected to the F end of the first logic chip J1 and the base of the first switch tube V1, the emitter of the first switch tube V1 is grounded, and the collector of the first switch tube V1 is connected to the other end of the first relay K1.

[0046] In a specific embodiment, the first logic chip J1 can be an AND gate chip. When the A terminal of the first logic chip J1 is in a high level state, the B terminal of the first logic chip J1 is self-locked at a high level in cooperation with the first diode D1 and the second diode D2. The first switch tube V1 can be an NPN transistor. The first relay K1 controls the conduction of the first relay switch K1-1 by magnetic attraction.

[0047] Furthermore, the automatic ignition control module 5 includes a second logic chip J2, a second switch tube V2, a second relay K2 and a second relay switch K2-1;

[0048] Specifically, the A end of the second logic chip J2 is connected to the flame detection module 4, the B end of the second logic chip J2 is connected to the F end of the first logic chip J1, the F end of the second logic chip J2 is connected to the base of the second switch tube V2, the emitter of the second switch tube V2 is grounded, the collector of the second switch tube V2 is connected to one end of the second relay K2, the other end of the second relay K2 is connected to the third end of the first rectifier T1 and the fixed end of the second relay switch K2-1, and the moving end of the second relay switch K2-1 is connected to the emitter of the fifth switch tube V5.

[0049] In a specific embodiment, the second logic chip J2 can be an AND gate chip; the second switch tube V2 can be an NPN transistor; the second relay K2 controls the conduction of the second relay switch K2-1 by magnetic attraction, and the second relay switch K2-1 can be a normally open switch.

[0050] Further, the flame detection module 4 includes a seventh resistor R7, a fourth diode D4, an eighth resistor R8, a ninth resistor R9, a first potentiometer RP1, a first comparator A1 and a first sensor IC1;

[0051] Specifically, the cathode of the fourth diode D4 is connected to one end of the eighth resistor R8 and one end of the ninth resistor R9 and is connected to the third end of the first rectifier T1 through the seventh resistor R7, the other end of the eighth resistor R8 is connected to the in-phase end of the first comparator A1 and the second end of the first sensor IC1, the other end of the ninth resistor R9 is connected to one end of the first potentiometer RP1, the inverting end of the first comparator A1 is connected to the slider end of the first potentiometer RP1, the other end of the first potentiometer RP1, the first end of the first sensor IC1 and the anode of the fourth diode D4 are all connected to the fourth end of the first rectifier T1 and the ground, and the output end of the first comparator A1 is connected to the A end of the second logic chip J2.

[0052] In a specific embodiment, the first sensor IC1 can be a YS-17 flame sensor; the first comparator A1 can be a LM393 comparator, which outputs a signal in a low-level state when a flame is detected, and outputs a signal in a high-level state when no flame is detected; the ninth resistor R9 and the first potentiometer RP1 set a voltage threshold as a critical value for detecting a flame.

[0053] Furthermore, the timing control module 6 includes a third switch tube V3, a first capacitor C1, a first resistor R1, a second resistor R2 and a fourth switch tube V4;

[0054] Specifically, the base of the third switch tube V3 is connected to the F end of the second logic chip J2, the emitter of the third switch tube V3 is connected to one end of the first capacitor C1 and one end of the first resistor R1 and is connected to the base of the fourth switch tube V4 through the second resistor R2, the emitter of the fourth switch tube V4 is connected to the base, the collector of the fourth switch tube V4 is connected to the A end of the first logic chip J1, the other end of the first capacitor C1 and the other end of the first resistor R1 are both grounded, and the collector of the third switch tube V3 is connected to the third end of the first rectifier T1.

[0055] In a specific embodiment, the third switch tube V3 and the fourth switch tube V4 can both be NPN transistors to control the first capacitor C1 to store energy. When the amount of electricity stored in the first capacitor C1 reaches the turn-on voltage of the fourth switch tube V4, the fourth switch tube V4 is turned on.

[0056] In a commercial kitchen gas ignition control circuit of the present embodiment, AC power is connected by a power interface, and the first transformer B1 and the first rectifier T1 perform voltage reduction and rectification processing. When the first key switch S1 is pressed, the fifth switch tube V5 cooperates with the second capacitor C2, the fifth resistor R5 and the first transformer B1 to oscillate, so as to boost the input power and output it in the form of AC power, which is rectified by the third diode D3, and the third capacitor C3 stores energy. When the power stored in the third capacitor C3 exceeds the discharge threshold set by the first trigger diode VD1, the first trigger diode VD1 is turned on and controls the first thyristor VS1 to be turned on, and the third The four capacitors C4 discharge the igniter through the third transformer B3 to generate spark discharge. At the same time, since the first key switch S1 is turned on, the B end of the first logic chip J1 becomes high level, and the A end of the first logic chip J1 remains high level, and the first diode D1 and the second diode D2 are self-locked, so that the F end of the first logic chip J1 self-locks and outputs a high level state signal and controls the first switch tube V1 to be turned on, the first relay K1 is energized and controls the first relay switch K1-1 to be closed, the gas valve device is energized and controls the gas valve to be opened, and the output gas and sparks complete the ignition work. At the same time, the first sensor IC1 generates a high level signal after the ignition is completed. The flame is detected. If no flame is detected, the first sensor IC1 is in the cut-off state, and the voltage transmitted from the eighth resistor R8 to the in-phase terminal of the first comparator A1 will be greater than the voltage threshold set by the ninth resistor R9 and the first potentiometer RP1. At this time, the first comparator A1 outputs a high level, so that the A terminal of the second logic chip J2 becomes a high level, and the F terminal of the second logic chip J2 outputs a high level and controls the second switch tube V2 and the third switch tube V3 to be turned on, controls the second relay K2 to be energized, and the first capacitor C1 stores energy. The second relay switch K2-1 is turned on and transmits electrical energy, and the second capacitor C2, the fifth resistor R5, and the fifth switch tube V 5. After the first transformer B1, the third diode D3, the sixth resistor R6, the third capacitor C3, the first trigger diode VD1, the first thyristor VS1, the fourth capacitor C4 and the third transformer B3 are processed, the igniter generates spark discharge again to ignite the gas released by the gas valve again. When the electric energy voltage stored in the first capacitor C1 triggers the fourth switch tube V4 to turn on, the fourth switch tube V4 pulls down the voltage of the A terminal of the first logic chip J1, so that the F terminal of the first logic chip J1 outputs a low level, the first switch tube V1 is cut off, the first relay K1 loses power, the first relay switch K1-1 is disconnected, the gas valve device loses power and closes the gas valve.

[0057] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A commercial kitchen gas ignition control circuit, characterized in that: include: Power module, ignition control module, gas valve control module, flame detection module, automatic ignition control module and timing control module; The power module is used to receive AC power, reduce the voltage of the AC power, rectify the AC power, and output the first power; The ignition control module is connected to the power module, and is used to receive the first electric energy output by the power module, and perform voltage conversion, boosting and rectification on the first electric energy output by the power module and store the rectified electric energy, and generate spark discharge when the stored electric energy is greater than a set discharge threshold; The gas valve control module is connected to the power module and the ignition control module, and is used to receive the first electric energy output by the power module and output the first control signal by self-locking when receiving the first electric energy input to the ignition control module, and control the opening of the gas valve by the first control signal; The flame detection module is connected to the power supply module, and is used to receive the first electric energy and detect the flame, and output a third control signal in a high level state when no flame is detected, and output a second control signal in a low level state when a flame is detected; The automatic ignition control module is connected to the power supply module, the flame detection module, the gas valve control module and the ignition control module, and is used to transmit the first electric energy to the ignition control module when receiving the third control signal in a high level state and the first control signal; The timing control module is connected to the power module, the brake ignition control module and the gas valve control module, and is used to set the timing duration and control the resetting of the gas valve control module to close the gas valve when the duration of receiving the third control signal in the high level state exceeds the timing duration.

2. A commercial kitchen gas ignition control circuit according to claim 1, characterized in that: The power supply module includes a power supply interface, a first transformer and a first rectifier; the gas valve control module includes a first relay switch and a gas valve device; The first end of the power interface is connected to the moving end of the first relay switch and the first end of the primary side of the first transformer, the second end of the power interface is connected to the first end of the gas valve device and the second end of the primary side of the first transformer, the fixed end of the first relay switch is connected to the second end of the gas valve device, the first end and the second end of the secondary side of the first transformer are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the ignition control module, the gas valve control module, the flame detection module, the automatic ignition control module and the timing control module, and the fourth end of the first rectifier is grounded.

3. A commercial kitchen gas ignition control circuit according to claim 2, characterized in that: The ignition control module includes a first key switch, a second capacitor, a fifth resistor, a fifth switch tube, a second transformer, a third diode, a sixth resistor, a third capacitor, a first trigger diode, a first thyristor, a fourth capacitor, a third transformer and an igniter; The fixed end of the first key switch is connected to the third end of the first rectifier, the base of the fifth switch tube is connected to the first end of the first primary of the second transformer, the moving end of the first key switch is connected to the emitter of the fifth switch tube and connected to the second end of the first primary of the second transformer and one end of the fifth resistor through the second capacitor, the collector of the fifth switch tube is connected to the first end of the second primary of the second transformer, the other end of the fifth resistor is connected to the second end of the second primary and the ground, the first end of the secondary side of the second transformer is connected to the anode of the third diode, the cathode of the third diode is connected to one end of the fourth capacitor and the anode of the first thyristor and connected to one end of the first trigger diode and one end of the third capacitor through the sixth resistor, the other end of the first trigger diode is connected to the control end of the first thyristor, the other end of the fourth capacitor is connected to the first end of the primary of the third transformer, the second end of the secondary side of the second transformer is connected to the other end of the third capacitor, the cathode of the first thyristor and the second end of the primary of the third transformer, and the first end and the second end of the secondary side of the third transformer are respectively connected to the first end and the second end of the igniter.

4. A commercial kitchen gas ignition control circuit according to claim 3, characterized in that: The gas valve control module also includes a third resistor, a fourth resistor, a first diode, a second diode, a first logic chip, a first switch tube and a first relay; The A end of the first logic chip is connected to one end of the first relay and the third end of the first rectifier through a third resistor, the B end of the first logic chip is connected to the cathode of the first diode and the cathode of the second diode, the anode of the first diode is connected to the moving end of the first key switch through a fourth resistor, the anode of the second diode is connected to the F end of the first logic chip and the base of the first switch tube, the emitter of the first switch tube is grounded, and the collector of the first switch tube is connected to the other end of the first relay.

5. A commercial kitchen gas ignition control circuit according to claim 4, characterized in that: The automatic ignition control module includes a second logic chip, a second switch tube, a second relay and a second relay switch; The A end of the second logic chip is connected to the flame detection module, the B end of the second logic chip is connected to the F end of the first logic chip, the F end of the second logic chip is connected to the base of the second switch tube, the emitter of the second switch tube is grounded, the collector of the second switch tube is connected to one end of the second relay, the other end of the second relay is connected to the third end of the first rectifier and the fixed end of the second relay switch, and the moving end of the second relay switch is connected to the emitter of the fifth switch tube.

6. A commercial kitchen gas ignition control circuit according to claim 5, characterized in that: The flame detection module includes a seventh resistor, a fourth diode, an eighth resistor, a ninth resistor, a first potentiometer, a first comparator and a first sensor; The cathode of the fourth diode is connected to one end of the eighth resistor and one end of the ninth resistor and is connected to the third end of the first rectifier through the seventh resistor, the other end of the eighth resistor is connected to the in-phase end of the first comparator and the second end of the first sensor, the other end of the ninth resistor is connected to one end of the first potentiometer, the inverting end of the first comparator is connected to the slider end of the first potentiometer, the other end of the first potentiometer, the first end of the first sensor and the anode of the fourth diode are all connected to the fourth end of the first rectifier and the ground, and the output end of the first comparator is connected to the A end of the second logic chip.

7. A commercial kitchen gas ignition control circuit according to claim 5, characterized in that: The timing control module includes a third switch tube, a first capacitor, a first resistor, a second resistor and a fourth switch tube; The base of the third switch tube is connected to the F end of the second logic chip, the emitter of the third switch tube is connected to one end of the first capacitor and one end of the first resistor and is connected to the base of the fourth switch tube through the second resistor, the emitter of the fourth switch tube is connected to the base, and the collector of the fourth switch tube is connected to the A end of the first logic chip, the other end of the first capacitor and the other end of the first resistor are both grounded, and the collector of the third switch tube is connected to the third end of the first rectifier.

Images