Control circuit with power-off protection function

Abstract

The utility model discloses a control circuit with a power-off protection function, which comprises a main control module, a power-off protection module and a driving module, the power-off protection module and the driving module are respectively and electrically connected with the main control module, the power-off protection module comprises a starting switch, one end of the starting switch is grounded, and the other end of the starting switch is grounded. The other end of the starting switch is electrically connected with the main control module; and when the starting switch is switched on, the main control module controls the driving module not to work when the starting switch is switched off and then is switched on, and the main control module controls the driving module to work when the starting switch is switched on.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, in particular to a control circuit with a power-off protection function. Background Art

[0002] During the normal use of existing commercial stoves, in case of a power failure, when the power is restored after the power failure, the kitchen utensils will automatically start working. If no one is present to use the kitchen utensils at this time, there will be a fire hazard and gas waste will be caused. Content of the Utility Model

[0003] An object of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a control circuit with a power-off protection function that can avoid automatic startup after a power failure and power restoration.

[0004] The control circuit with a power-off protection function according to an embodiment of the utility model includes a main control module, a power-off protection module and a driving module that are respectively electrically connected to the main control module. The power-off protection module includes a start switch. One end of the start switch is grounded, and the other end of the start switch is electrically connected to the main control module. When the power is restored after a power failure, the main control module controls the driving module not to work. When the start switch is turned on, the main control module controls the driving module to work.

[0005] According to some embodiments of the utility model, the power-off protection module further includes a resistor R1 and a capacitor C1. One end of the capacitor C1 is grounded, and the other end of the capacitor C1 is electrically connected to one end of the resistor R1 and the other end of the start switch respectively. The other end of the resistor R1 is electrically connected to the main control module.

[0006] According to some embodiments of the utility model, the driving module is used to drive an electromagnetic valve, and further includes a valve control module and a valve detection module that are respectively electrically connected to the main control module, and the valve control module is electrically connected to the driving module. The valve detection module is used to detect a valve driving signal or a valve driving tube signal of the electromagnetic valve and feedback the valve driving signal or the valve driving tube signal to the main control module. When the main control module detects that the valve driving signal or the valve driving tube signal is normal / anomalous, the main control module sends an open valve power supply signal / a close valve power supply signal to the valve control module, and the valve control module controls the driving module to supply power to open / close the valve.

[0007] According to some embodiments of the present utility model, the driving module includes a diode D1, a diode D2, a triode Q1, and a triode Q2. The base of the triode Q1 is electrically connected to the main control module. The collector of the triode Q1 is electrically connected to one end of the solenoid valve, the anode of the diode D1, and the cathode of the diode D2 respectively. The cathode of the diode D1 and the other end of the solenoid valve are respectively connected to the working voltage VPP. The anode of the diode D2 is used to detect the valve drive signal or the valve drive tube signal. The base of the triode Q2 is electrically connected to the valve control module. The collector of the triode Q2 is electrically connected to the emitter of the triode Q1. The emitter of the triode Q2 is grounded.

[0008] According to some embodiments of the present utility model, the valve detection module includes a triode Q3 and a capacitor C2. The base of the triode Q3 is used to detect the valve drive signal or the valve drive tube signal. The emitter of the triode Q3 inputs the working voltage VCC. The collector of the triode Q3 is electrically connected to one end of the capacitor C2 and the main control module respectively. The other end of the capacitor C2 is grounded.

[0009] According to some embodiments of the present utility model, a power supply module is further included, and the power supply module can output the working voltage VPP and the working voltage VCC.

[0010] According to some embodiments of the present utility model, a filtering module is further included, and the filtering module is electrically connected to the main control module and the valve control module respectively.

[0011] According to some embodiments of the present utility model, an ignition module is further included, and the ignition module is electrically connected to the main control module.

[0012] According to some embodiments of the present utility model, a flame detection module is further included, and the flame detection module is electrically connected to the main control module. When the flame detection module detects a flameout signal, the main control module controls the circuit to be cut off to achieve flameout protection.

[0013] According to some embodiments of the present utility model, an alarm module electrically connected to the main control module is further included.

[0014] The control circuit with a power-off protection function according to the embodiments of the present utility model has at least the following beneficial effects: Due to the existence of the start switch hardware, when power is restored after power-off, first, the main control module controls the whole machine not to start, and the output parts such as each valve control module, driving module, and ignition module have no output. After power-on, only when the start switch is manually pressed, the main control module sends a start signal, and the circuits such as the ignition module, valve control module, and driving module start to work normally, improving the reliability of the electrical appliance. By adopting the combination of software and hardware of the start switch and the main control module, the structure is simple, and it can effectively avoid automatic startup after power-off and power-on.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the specific embodiments of the present utility model with reference to the drawings;

[0017] Figure 1 is a control block diagram of a control circuit with a power-off protection function;

[0018] Figure 2 is a schematic diagram of a control circuit with a power-off protection function. SPECIFIC EMBODIMENTS

[0019] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0021] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0022] Refer to Figures 1 to 2, a control circuit with a power-off protection function according to the present utility model includes a main control module 10, a power-off protection module 20 and a drive module 30 which are electrically connected to the main control module 10 respectively. The power-off protection module 20 includes a start switch, and the start switch can adopt a push-button switch K1. One end of the start switch is grounded, and the other end of the start switch is electrically connected to the main control module 10. Due to the existence of this hardware of the start switch, when power is restored after power-off, first, the main control module 10 controls the whole machine not to start, and there is no output in the output parts such as each valve control module 11, drive module 30, ignition module 60, etc. After power-on, only when the start switch is manually pressed, the main control module 10 issues a start signal, and circuits such as the ignition module 60, valve control module 11, drive module 30, etc. start to work normally, improving the reliability of the electrical appliance. By adopting the software and hardware combination method of the start switch and the main control module, the structure is simple, and it can effectively avoid automatic start-up after power-off and power-on.

[0023] In some embodiments, such as Figure 2 , the power-off protection module 20 further includes a resistor R1 and a capacitor C1. One end of the capacitor C1 is grounded, and the other end of the capacitor C1 is electrically connected to one end of the resistor R1 and the other end of the start switch respectively. The other end of the resistor R1 is electrically connected to the main control module 10.

[0024] In some embodiments, the drive module 30 is used to drive the solenoid valve, and further includes a valve control module 11 and a valve detection module 12 which are electrically connected to the main control module 10 respectively, and the valve control module 11 is electrically connected to the drive module 30. The main control module 10 adopts a main control chip IC1, the valve control module 11 adopts a control chip IC2, and the valve detection module 12 is used to detect the valve drive signal or valve drive tube signal of the solenoid valve and feedback the valve drive signal or valve drive tube signal to the main control module 10. When the main control module 10 detects that the valve drive signal or valve drive tube signal is normal / anomalous, the main control module 10 sends an open valve power supply signal / a close valve power supply signal to the valve control module 11, and the valve control module 11 controls the drive module 30 to open the valve power supply / close the valve power supply.

[0025] Such as Figure 2 As shown, the drive module 30 includes a diode D1, a diode D2, a triode Q1 and a triode Q2. The base of the triode Q1 is electrically connected to the main control module 10. The collector of the triode Q1 is electrically connected to one end of the solenoid valve, the anode of the diode D1 and the cathode of the diode D2 respectively. The cathode of the diode D1 and the other end of the solenoid valve are respectively connected to the working voltage VPP. The anode of the diode D2 is used to detect the valve drive signal or valve drive tube signal. The base of the triode Q2 is electrically connected to the valve control module 11. The collector of the triode Q2 is electrically connected to the emitter of the triode Q1. The emitter of the triode Q2 is grounded.

[0026] The check valve module 12 includes a triode Q3 and a capacitor C2. The base of the triode Q3 is used to detect the valve drive signal or the valve drive tube signal. The emitter of the triode Q3 inputs the operating voltage VCC. The collector of the triode Q3 is electrically connected to one end of the capacitor C2 and the main control module 10 respectively, and the other end of the capacitor C2 is grounded.

[0027] Furthermore, it further includes a power supply module 40, a filtering module 50, an ignition module 60, a fire detection module 70, and an alarm module 80 that are respectively electrically connected to the main control module 10. When the fire detection module 70 detects a flameout signal, the main control module 10 controls to cut off the circuit to achieve flameout protection; the alarm module 80 can adopt a buzzer circuit. The power supply module 40 can output an operating voltage VPP and an operating voltage VCC. The operating voltage VPP is used to supply power to the drive module 30, and the operating voltage VCC is used to supply power to the main control module 10, the filtering module 50, the ignition module 60, the fire detection module 70, and the alarm module 80.

[0028] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above preferred methods can be freely combined and superimposed.

[0029] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A control circuit with a power-off protection function, characterized in that, Including: A main control module (10), a power-off protection module (20) and a driving module (30) which are electrically connected to the main control module (10) respectively. The power-off protection module (20) includes a start switch. One end of the start switch is grounded, and the other end of the start switch is electrically connected to the main control module (10). When power is applied after power-off, the main control module (10) controls the driving module (30) not to work. When the start switch is turned on, the main control module (10) controls the driving module (30) to work. The driving module (30) is used to drive an electromagnetic valve. It also includes a valve control module (11) and a valve detection module (12) which are electrically connected to the main control module (10) respectively, and the valve control module (11) is electrically connected to the driving module (30). The valve detection module (12) is used to detect a valve driving signal or a valve driving tube signal of the electromagnetic valve and feedback the valve driving signal or the valve driving tube signal to the main control module (10). When the main control module (10) detects that the valve driving signal or the valve driving tube signal is normal / anomalous, the main control module (10) sends an open valve power supply signal / a close valve power supply signal to the valve control module (11), and the valve control module (11) controls the driving module (30) to supply power to open the valve / to cut off the power supply to close the valve.

2. The control circuit with a power-off protection function according to claim 1, characterized in that: The power-off protection module (20) further includes a resistor R1 and a capacitor C1. One end of the capacitor C1 is grounded, the other end of the capacitor C1 is electrically connected to one end of the resistor R1 and the other end of the start switch respectively, and the other end of the resistor R1 is electrically connected to the main control module (10).

3. The control circuit with power-off protection function according to claim 1, characterized in that: The driving module (30) includes a diode D1, a diode D2, a triode Q1 and a triode Q2. The base of the triode Q1 is electrically connected to the main control module (10). The collector of the triode Q1 is electrically connected to one end of the electromagnetic valve, the anode of the diode D1 and the cathode of the diode D2 respectively. The cathode of the diode D1 and the other end of the electromagnetic valve are respectively connected to the working voltage VPP. The anode of the diode D2 is used to detect the valve driving signal or the valve driving tube signal. The base of the triode Q2 is electrically connected to the valve control module (11). The collector of the triode Q2 is electrically connected to the emitter of the triode Q1, and the emitter of the triode Q2 is grounded.

4. The control circuit with power-off protection function according to claim 3, characterized in that: The valve detection module (12) includes a triode Q3 and a capacitor C2. The base of the triode Q3 is used to detect the valve driving signal or the valve driving tube signal. The emitter of the triode Q3 inputs the working voltage VCC. The collector of the triode Q3 is electrically connected to one end of the capacitor C2 and the main control module (10) respectively, and the other end of the capacitor C2 is grounded.

5. The control circuit with a power-off protection function according to claim 4, wherein: It further includes a power supply module (40) which can output the working voltage VPP and the working voltage VCC.

6. The control circuit with a power-off protection function according to claim 1, characterized in that: It further includes a filtering module (50) which is electrically connected to the main control module (10) and the valve control module (11) respectively.

7. The control circuit with a power-off protection function according to claim 1, characterized in that: It further includes an ignition module (60) which is electrically connected to the main control module (10).

8. The control circuit with power-off protection function according to claim 1, characterized in that: It further includes a fire detection module (70), and the fire detection module (70) is electrically connected to the main control module (10). When the fire detection module (70) detects a flameout signal, the main control module (10) controls to cut off the circuit to achieve flameout protection.

9. The control circuit with power-off protection function according to claim 1, characterized in that: It further includes an alarm module (80) that is electrically connected to the main control module (10).

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