Flameout protection device of quick switching power supply

Abstract

The utility model discloses a flame-out protection device of a quick switching power supply and belongs to the technical field of gas equipment. The ignition needle and the induction needle of the device are fixedly mounted in the combustion chamber, so that the ignition and detection effects of the device are improved; a power supply detection AC 220V of the device is connected with the output end of a power supply switch, an input voltage is immediately detected and timely fed back to a single chip microcomputer for control, the single chip microcomputer is controlled to work in a short time when a power supply detection circuit detects low voltage or unstable voltage, the power supply can be quickly switched on and off, various functions can be realized, for example, a quick switch starts an ignition emergency, and the power supply is switched off. Or the quick switch starts the electromagnetic valve for emergency under three times and starts all emergencies under four times, so that the problem that some areas cannot be used due to the influence of the mains supply is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas equipment, and in particular relates to a flameout protection device for a fast switching power supply. Background Art

[0002] Commercial gas stoves are cooking equipment suitable for large kitchens in hotels, restaurants, canteens and other catering places, as well as major government agencies, schools, and construction site canteens. Commercial stoves usually provide ignition and valve opening functions. The igniter is generally a pulse igniter. The pulse igniter is a pulse high-frequency oscillator composed of electronic components. The high-frequency voltage generated by the oscillator is boosted by a step-up transformer to generate a high voltage, and the tip discharge is performed. The spark of the discharge ignites the gas on the gas stove. This pulse igniter can discharge continuously and has a good ignition effect.

[0003] However, the flameout protection of commercial stoves commonly used in the market is directly powered by the power supply. When there is a power outage or unstable power supply or in areas with low mains voltage, they cannot be used normally. Therefore, our company has proposed a flameout protection device with a fast switching power supply to solve the above problems. Summary of the invention

[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a flameout protection device for a fast switching power supply.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: a flameout protection device for a fast switching power supply, including a DC / DC step-down power supply circuit, and also including a single-chip control circuit, an ignition circuit, a power supply detection circuit, a flame detection circuit, a solenoid valve control circuit and a solenoid valve, the output end of the DC / DC step-down power supply circuit is connected to the input end of the single-chip control circuit, and the output end of the single-chip control circuit is connected to the input end of the ignition circuit, the output end of the flame detection circuit, the output end of the power supply detection circuit, and the input end of the solenoid valve control circuit.

[0006] Preferably, the ignition circuit comprises an ignition needle, and the output end of the ignition circuit is connected to the ignition needle.

[0007] Preferably, the flame detection circuit comprises a sensing needle, and the sensing needle is connected to an input end of the flame detection circuit.

[0008] Preferably, the output end of the solenoid valve control circuit is connected to the solenoid valve.

[0009] The utility model has the beneficial effects:

[0010] 1. The ignition needle and the sensing needle of the device are installed and fixed to the combustion chamber, which improves the ignition and detection effects of the device;

[0011] 2. The power supply detection of the device connects AC220V to the output end of the power switch, immediately detects the input voltage and promptly feeds back to the single-chip microcomputer for control. When the power supply detection circuit detects low voltage or unstable voltage, it controls the single-chip microcomputer to work in a short period of time, and can realize fast switching power supply to realize various functions, such as fast switching twice to start the ignition emergency, or fast switching three times to start the solenoid valve emergency, four times to start all emergency, etc., which improves the problem that some areas cannot be used due to the influence of municipal power. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1. DC / DC step-down power supply circuit; 2. Single-chip microcomputer control circuit; 3. Ignition circuit; 4. Power supply detection circuit; 5. Flame detection circuit; 6. Solenoid valve control circuit; 7. Solenoid valve; 8. Ignition needle; 9. Induction needle. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0015] Embodiment: A flameout protection device for a fast switching power supply, such as Figure 1 As shown, it includes a DC / DC step-down power supply circuit 1, and also includes a single-chip control circuit 2, an ignition circuit 3, a power supply detection circuit 4, a flame detection circuit 5, a solenoid valve control circuit 6 and a solenoid valve 7. The output end of the DC / DC step-down power supply circuit 1 is connected to the input end of the single-chip control circuit 2, and the output end of the single-chip control circuit 2 is connected to the input end of the ignition circuit 3, the output end of the flame detection circuit 5, the output end of the power supply detection circuit 4, and the input end of the solenoid valve control circuit 6.

[0016] The ignition circuit 3 includes an ignition needle 8, and the output end of the ignition circuit 3 is connected to the ignition needle 8; the flame detection circuit 5 includes a sensing needle 9, and the sensing needle 9 is connected to the input end of the flame detection circuit 5; the output end of the solenoid valve control circuit 6 is connected to the solenoid valve 7.

[0017] The principle of the utility model is as follows: when the power is turned on, the power detection circuit 4 takes effect to control the single-chip microcomputer control circuit 2 to take effect; the end of the ignition needle 8 discharges to open the solenoid valve 7; after the induction needle 9 detects the flame, the flame detection circuit 5 takes effect and the solenoid valve 7 is maintained; if the induction needle does not detect the flame, the flame detection circuit 5 fails and the solenoid valve 7 is closed; during normal use, when the power detection circuit 4 detects low voltage or unstable voltage, it controls the single-chip microcomputer to work in a short period of time, and can realize fast switching power supply to realize various functions, such as quickly switching twice to start ignition, re-running the startup program, avoiding the solenoid valve 7 from closing and causing flameout, or quickly switching three times at the same time to start the solenoid valve 7, avoiding the solenoid valve 7 from losing power and closing and causing flameout, and improving the problem that some areas cannot be used due to the influence of the city power.

[0018] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. A flameout protection device for a fast switching power supply, comprising a DC / DC step-down power supply circuit (1), characterized in that: The invention also comprises a single chip microcomputer control circuit (2), an ignition circuit (3), a power supply detection circuit (4), a flame detection circuit (5), a solenoid valve control circuit (6) and a solenoid valve (7); the output end of the DC / DC step-down power supply circuit (1) is connected to the input end of the single chip microcomputer control circuit (2); the output end of the single chip microcomputer control circuit (2) is connected to the input end of the ignition circuit (3), the output end of the flame detection circuit (5), the output end of the power supply detection circuit (4) and the input end of the solenoid valve control circuit (6).

2. The flameout protection device for a fast switching power supply according to claim 1, characterized in that: The ignition circuit (3) comprises an ignition needle (8), and the output end of the ignition circuit (3) is connected to the ignition needle (8).

3. The flameout protection device for a fast switching power supply according to claim 1, characterized in that: The flame detection circuit (5) comprises a sensing needle (9), and the sensing needle (9) is connected to the input end of the flame detection circuit (5).

4. The flameout protection device for a fast switching power supply according to claim 1, characterized in that: The output end of the solenoid valve control circuit (6) is connected to the solenoid valve (7).

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