Stove control device

Abstract

The utility model provides a cooker control device. The cooker control device comprises a power supply circuit, an ignition signal detection circuit, a battery voltage detection circuit and an ignition control circuit, the power supply circuit is electrically connected with the ignition signal detection circuit, the battery voltage detection circuit and the ignition control circuit. The ignition signal detection circuit is electrically connected with the battery voltage detection circuit; and the battery voltage detection circuit is electrically connected with the ignition control circuit. In cooperation with the battery voltage detection circuit and the ignition control circuit, when the battery voltage detection circuit detects that the battery voltage reaches the preset rule, the ignition control circuit is triggered to carry out ignition operation, and the potential safety hazard that ignition can still be carried out after the dry burning prevention function is started is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of kitchen stoves, and in particular to a stove control device. Background Art

[0002] Adding an anti-dry-burn function to stoves is a very necessary function for users, and battery-powered stoves with an anti-dry-burn function have become the mainstream application trend.

[0003] In a battery-powered stove with an anti-dry-burn function, the battery voltage may be low, lower than the amount of electricity that can normally close the gas valve in the anti-dry-burn state. At this time, the anti-dry-burn function will fail, but because the working voltage of the stove igniter is much lower than the voltage value at this time, the igniter can still ignite the stove. Under this condition, the anti-dry-burn function will fail. If the stove is dry-burned, it will cause safety hazards.

[0004] Most of the stoves with anti-dry-burn function on the market do not have ignition control function. Some stoves with ignition control function only increase the ignition voltage, which has nothing to do with the working voltage of the anti-dry-burn or timing system. Summary of the invention

[0005] The technical problem to be solved by the present disclosure is to provide a stove control device to overcome the potential safety hazard defect in the prior art that the stove can still ignite after the anti-dry-burn function is turned on.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present disclosure provides a stove control device, which comprises: a power supply circuit, an ignition signal detection circuit, a battery voltage detection circuit and an ignition control circuit;

[0008] The power supply circuit is electrically connected to the ignition signal detection circuit, the battery voltage detection circuit and the ignition control circuit respectively; the ignition signal detection circuit is electrically connected to the battery voltage detection circuit; the battery voltage detection circuit is electrically connected to the ignition control circuit.

[0009] Preferably, the stove control device further includes a power supply delay circuit, and the power supply delay circuit is electrically connected to the ignition control circuit.

[0010] Preferably, the ignition signal detection circuit includes a left stove ignition signal detection circuit and a right stove ignition signal detection circuit;

[0011] The left-side stove ignition signal detection circuit is used to detect a first ignition signal of the left-side stove, and send the first ignition signal to the battery voltage detection circuit;

[0012] The right-side stove ignition signal detection circuit is used to detect a second ignition signal of the right-side stove, and send the second ignition signal to the battery voltage detection circuit.

[0013] Preferably, the power supply circuit comprises: a first micro switch, a first diode, a first resistor, a second resistor, a third resistor, a first transistor and a second transistor;

[0014] One end of the first micro switch is connected to the battery voltage, and the other end of the first micro switch is connected to one end of the first diode; the other end of the first diode is connected to one end of the first resistor; the other end of the first resistor is respectively connected to one end of the second resistor and the base of the first transistor; the collector of the first transistor is connected to one end of the third resistor; the other end of the third resistor is connected to the base of the second transistor;

[0015] The emitter of the second transistor is connected to the battery voltage, and the collector of the second transistor is connected to the circuit voltage; the other end of the second resistor and the emitter of the first transistor are grounded.

[0016] Preferably, the power supply circuit further comprises: a second micro switch and a second diode;

[0017] One end of the second micro switch is connected to the battery voltage, and the other end of the second micro switch is connected to one end of the second diode; the other end of the second diode is connected to one end of the first resistor.

[0018] Preferably, the power supply circuit further includes: a first capacitor;

[0019] One end of the first capacitor is connected to one end of the first diode, the second diode and the first resistor respectively, and the other end of the first capacitor is grounded.

[0020] Preferably, the ignition signal detection circuit comprises: a second capacitor, a fourth resistor, a fifth resistor, a third capacitor, a first MOS tube, and a sixth resistor;

[0021] One end of the second capacitor is respectively connected to the micro switch of the power supply circuit and one end of the fifth resistor; one end of the fourth resistor is connected to one end of the fifth resistor; the other end of the fifth resistor is respectively connected to one end of the third capacitor and the gate of the first MOS tube; the drain of the first MOS tube is connected to one end of the sixth resistor;

[0022] The other end of the second capacitor, the other end of the fourth resistor and the other end of the third capacitor are connected to the source of the first MOS tube;

[0023] The other end of the sixth resistor is connected to the circuit voltage.

[0024] Preferably, the ignition signal detection circuit further includes a third diode;

[0025] One end of the third diode is connected to the micro switch, and the other end of the third diode is connected to the source of the first MOS tube.

[0026] Preferably, the battery voltage detection circuit comprises a seventh resistor, an eighth resistor, a ninth resistor and a fourth capacitor;

[0027] One end of the seventh resistor is connected to the circuit voltage, and the other end of the seventh resistor is respectively connected to one end of the eighth resistor and one end of the ninth resistor; the other end of the eighth resistor is grounded; the other end of the ninth resistor is respectively connected to one end of the fourth capacitor and the interface for converting analog signals into digital signals; the other end of the fourth capacitor is grounded.

[0028] Preferably, the ignition control circuit comprises a tenth resistor, an eleventh resistor, a third transistor, a twelfth resistor, a fourth transistor and a high-frequency magnetic bead;

[0029] One end of the tenth resistor is connected to the battery voltage detection circuit, and the other end of the tenth resistor is respectively connected to one end of the eleventh resistor and the base of the third transistor; the collector of the third transistor is connected to one end of the twelfth resistor, and the other end of the twelfth resistor is connected to the base of the fourth transistor; the emitter of the fourth transistor is connected to the circuit voltage; the collector of the fourth transistor is connected to one end of the high-frequency magnetic bead; the other end of the high-frequency magnetic bead is connected to the igniter;

[0030] The other end of the eleventh resistor and the emitter of the third transistor are grounded.

[0031] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0032] The positive and progressive effects of this disclosure are:

[0033] The present invention cooperates with a battery voltage detection circuit and an ignition control circuit. When the battery voltage detection circuit detects that the battery voltage reaches a preset rule, the ignition control circuit is triggered to perform an ignition operation, thereby avoiding as much as possible the safety hazard that the stove can still ignite after the anti-dry burning function is turned on. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A structural diagram of a cooker control device provided by an exemplary embodiment of the present disclosure;

[0035] Figure 2A power supply circuit diagram of a cooker control device provided by an exemplary embodiment of the present disclosure;

[0036] Figure 3 An ignition signal detection circuit diagram of a cooker control device provided by an exemplary embodiment of the present disclosure;

[0037] Figure 4 A battery voltage detection circuit diagram of a cooker control device provided by an exemplary embodiment of the present disclosure;

[0038] Figure 5 An ignition control circuit diagram of a cooker control device provided by an exemplary embodiment of the present disclosure;

[0039] Figure 6 A flowchart of a cooker control device provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.

[0041] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] Figure 1 A stove control device is provided as an exemplary embodiment of the present disclosure. The stove control device comprises: a power supply circuit 101 , an ignition signal detection circuit 102 , a battery voltage detection circuit 103 and an ignition control circuit 104 .

[0043] The power supply circuit is electrically connected to the ignition signal detection circuit, the battery voltage detection circuit and the ignition control circuit respectively. The ignition signal detection circuit is electrically connected to the battery voltage detection circuit. The battery voltage detection circuit is electrically connected to the ignition control circuit.

[0044] The power supply circuit is used to supply power to the cooker control device.

[0045] The ignition signal detection circuit is used to detect the ignition signal and quickly identify the user's ignition requirements.

[0046] The battery voltage detection circuit is used to receive the ignition signal and detect the battery voltage of the power supply circuit. When the battery voltage is greater than or equal to the anti-dry burning working voltage, the ignition control circuit is triggered to perform the ignition operation.

[0047] The ignition control circuit is used to trigger the main control unit of the cooker to control the ignition function.

[0048] In this embodiment, when the battery voltage detection circuit detects that the battery voltage is higher than the minimum voltage of the anti-dry-burning system, the ignition control circuit is triggered to perform an ignition operation. The battery voltage detection circuit and the ignition control circuit cooperate to avoid as much as possible the safety hazard that the stove can still ignite after the anti-dry-burning function is turned on.

[0049] In an alternative embodiment, see Figure 1 The stove control device also includes a power supply delay circuit 105, which is electrically connected to the ignition control circuit.

[0050] The power supply delay circuit is used to cut off the power supply of the cooker control device after the ignition control circuit ignites.

[0051] In this embodiment, the power supply delay circuit can realize the function of cutting off the power of the circuit board after the stove ignition is completed, thereby reducing the power consumption of the stove battery and reducing the cost while successfully realizing the stove ignition.

[0052] In an optional implementation, the ignition signal detection circuit includes a left-side stove ignition signal detection circuit and a right-side stove ignition signal detection circuit.

[0053] The left-side stove ignition signal detection circuit is used for detecting a first ignition signal of the left-side stove and sending the first ignition signal to the battery voltage detection circuit.

[0054] The right stove ignition signal detection circuit is used to detect the second ignition signal of the right stove and send the second ignition signal to the battery voltage detection circuit.

[0055] In this embodiment, the left stove ignition signal detection circuit and the right stove ignition signal detection circuit are used to accurately obtain the specific side where the user's ignition demand is located, and the anti-dry-burn function is activated on this side, while the other side is not ignited and the anti-dry-burn function is not activated. While improving the ignition efficiency, the power consumption of activating the anti-dry-burn function is further reduced.

[0056] In an alternative embodiment, see Figure 2 The power supply circuit includes: a first micro switch KEY1, a first diode D304, a first resistor R317, a second resistor R319, a third resistor R320, a first transistor Q305 and a second transistor Q307.

[0057] One end of the first micro switch KEY1 is connected to the battery voltage (3V_BAT), and the other end of the first micro switch KEY1 is connected to one end of the first diode D304. The other end of the first diode D304 is connected to one end of the first resistor R317. The other end of the first resistor R317 is respectively connected to one end of the second resistor R319 and the base of the first transistor Q305. The collector of the first transistor Q305 is connected to one end of the third resistor R319. The other end of the third resistor R319 is connected to the base of the second transistor Q307.

[0058] The emitter of the second transistor Q307 is connected to the battery voltage (3V_BAT), and the collector of the second transistor Q307 is connected to the circuit voltage (VCC). The other end of the second resistor R319 and the emitter of the first transistor Q305 are grounded.

[0059] In an alternative embodiment, see Figure 2 The power supply circuit further includes: a second micro switch KEY2 and a second diode D305. In this embodiment, the second micro switch KEY2 is used to represent the ignition micro switch of the right stove.

[0060] One end of the second micro switch KEY2 is connected to the battery voltage (3V_BAT), and the other end of the second micro switch KEY2 is connected to one end of the second diode D305. The other end of the second diode D305 is connected to one end of the first resistor R317.

[0061] The arrangement of the first diode D304 and the second diode D305 in the power supply circuit can avoid interference between the ignition signals of the left stove knob and the right stove knob. By detecting the networks L_SW_FIRE (left stove ignition signal) and R_SW_FIRE (right stove ignition signal) in the circuit, it can be determined which side of the stove the ignition signal is.

[0062] In an alternative embodiment, see Figure 2 , the power supply circuit also includes: a first capacitor EC301.

[0063] One end of the first capacitor EC301 is connected to one end of the first diode Q305, the second diode Q307 and the first resistor R317 respectively, and the other end of the first capacitor EC301 is grounded.

[0064] The setting of the first capacitor EC301 solves the problem of short system working time caused by the ignition micro switch being pressed for too short a time.

[0065] When the ignition micro switch is triggered, the battery voltage (3V_BAT) charges the first capacitor EC301, and when the voltage is higher than the conduction voltage Vbe of the first transistor Q305, the first transistor Q305 and the second transistor Q307 are turned on, and the battery power supply and the control board circuit voltage are connected, providing power to the board of the stove control device.

[0066] When the ignition micro switch is released, the electricity stored in the first capacitor EC301 (3V in this embodiment) is discharged through the first resistor R317, the first transistor Q305 and the second resistor R319, which can maintain the first transistor Q305 and the second transistor Q307 being turned on. The time can be controlled by the capacitance value of the first capacitor EC301. When the turn-on voltage Vbe is released, the first transistor Q305 and the second transistor Q307 return to the cut-off state, and the power supply ends. This period of time needs to be set to exceed the program running time of the MCU (micro control unit) detecting the ignition and giving the ignition signal to the igniter. In actual applications, the program running time is set to be greater than 5S (seconds).

[0067] In an alternative embodiment, see Figure 3 The ignition signal detection circuit includes: a second capacitor C305, a fourth resistor R308, a fifth resistor R309, a third capacitor C303, a first MOS tube Q301, and a sixth resistor R313.

[0068] One end of the second capacitor C305 is respectively connected to the micro switch KEY1 or KEY2 of the power supply circuit and one end of the fifth resistor R309. One end of the fourth resistor R308 is connected to one end of the fifth resistor R309. The other end of the fifth resistor R309 is respectively connected to one end of the third capacitor C303 and the gate of the first MOS tube Q301. The drain of the first MOS tube Q301 is connected to one end of the sixth resistor R313.

[0069] The other end of the second capacitor C305, the other end of the fourth resistor R308 and the other end of the third capacitor C303 are connected to the source of the first MOS transistor Q301.

[0070] The other end of the sixth resistor R313 is connected to the circuit voltage (VCC).

[0071] The second capacitor C305 is provided to ensure that the duration of the ignition micro switch signal is greater than the power-on time of the ignition signal detection circuit, thereby avoiding the situation where the ignition micro switch signal cannot be detected when the ignition signal detection circuit is powered on but the ignition micro switch has been released.

[0072] In an alternative embodiment, see Figure 3 The ignition signal detection circuit also includes a third diode D302.

[0073] One end of the third diode D302 is connected to the micro switch KEY1 or KEY2, and the other end of the third diode D302 is connected to the source of the first MOS transistor Q301.

[0074] The third diode D302 in the ignition signal detection circuit is an ESD diode (a type of diode), which can avoid damage to the first MOS tube Q301 and prevent the risk of misjudgment, that is, avoid misjudging static electricity as an ignition signal.

[0075] This embodiment is a left stove ignition signal detection circuit (the same as the right stove ignition signal detection circuit). When the micro switch KEY1 or KEY2 is turned on, the gate level of the first MOS tube Q301 is pulled up to the battery voltage (3V in this embodiment). After turning on, the detection port L_IN outputs a low level. When the ignition signal is lost, the gate level is pulled low, and the detection port L_IN outputs a high level.

[0076] Connecting the ignition signal L_IN to the external interrupt port of the control unit or the control chip can achieve a rapid response in a low-power sleep state.

[0077] In an alternative embodiment, see Figure 4 The battery voltage detection circuit includes a seventh resistor R101, an eighth resistor R102, a ninth resistor R103 and a fourth capacitor C105.

[0078] One end of the seventh resistor R101 is connected to the circuit voltage (VCC), and the other end of the seventh resistor R101 is respectively connected to one end of the eighth resistor R102 and one end of the ninth resistor R103. The other end of the eighth resistor R102 is grounded (GND). The other end of the ninth resistor R103 is respectively connected to one end of the fourth capacitor C105 and an interface (BatterADC) for converting analog signals into digital signals. The other end of the fourth capacitor C105 is grounded (GND).

[0079] In this embodiment, after the power supply circuit is turned on, the battery supplies power to the control board of the stove control device, and the circuit voltage VCC rises. The battery voltage is detected by the battery voltage detection circuit. The detection result is output to the interface (AD interface) of the control board that converts analog signals into digital signals.

[0080] In an alternative embodiment, see Figure 5 The ignition control circuit includes a tenth resistor R306, an eleventh resistor R307, a third transistor Q300, a twelfth resistor R312, a fourth transistor Q303 and a high-frequency magnetic bead L301. L301 is a high-frequency magnetic bead that can prevent the ignition pulse of the igniter from damaging the ignition control circuit.

[0081] One end of the tenth resistor R306 is connected to the battery voltage detection circuit, and the other end of the tenth resistor R306 is respectively connected to one end of the eleventh resistor R307 and the base of the third transistor Q300. The collector of the third transistor Q300 is connected to one end of the twelfth resistor R312, and the other end of the twelfth resistor R312 is connected to the base of the fourth transistor Q303. The emitter of the fourth transistor Q303 is connected to the circuit voltage (VCC). The collector of the fourth transistor Q303 is connected to one end of the high-frequency magnetic bead L301. The other end L301 of the high-frequency magnetic bead is connected to the igniter.

[0082] The other end of the eleventh resistor R307 and the emitter of the third transistor Q300 are grounded.

[0083] Fire_ctr_L is connected to the IO port of the control unit of the cooker control device. When ignition is required, a high-level signal is output, the third transistor Q300 and the fourth transistor Q303 are turned on, and the circuit voltage VCC outputs 3 volts to the ignition control terminal Fire_L of the igniter, and controls the ignition of the igniter.

[0084] The following introduces a specific method to describe the workflow of this embodiment in detail. Figure 6 :

[0085] S601. Start.

[0086] S602, after the system is powered on, first determine whether the left and right knob ignition micro switches are turned on. If the left knob and / or the right knob is turned on, execute step S603, otherwise, execute step S608.

[0087] S603, MCU (micro control unit) exits the sleep state.

[0088] S604: Detect the current battery voltage.

[0089] S605, determine whether the current battery voltage is less than the anti-dry-burn working voltage, if so, execute step S606, otherwise, execute step S609.

[0090] S606: Execute low battery alarm.

[0091] S607, end.

[0092] S608: The MCU remains in sleep mode and returns to step S607.

[0093] S609, start the left stove and / or the right stove ignition.

[0094] S610, execute anti-dry-burn protection, and return to step S607.

[0095] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A stove control device, characterized in that: The stove control device comprises: a power supply circuit, an ignition signal detection circuit, a battery voltage detection circuit and an ignition control circuit; The power supply circuit is electrically connected to the ignition signal detection circuit, the battery voltage detection circuit and the ignition control circuit respectively; the ignition signal detection circuit is electrically connected to the battery voltage detection circuit; the battery voltage detection circuit is electrically connected to the ignition control circuit.

2. The cooker control device according to claim 1, characterized in that: The stove control device further includes a power supply delay circuit, and the power supply delay circuit is electrically connected to the ignition control circuit.

3. The cooker control device according to claim 1, characterized in that: The ignition signal detection circuit includes a left stove ignition signal detection circuit and a right stove ignition signal detection circuit; The left-side stove ignition signal detection circuit is used to detect a first ignition signal of the left-side stove, and send the first ignition signal to the battery voltage detection circuit; The right-side stove ignition signal detection circuit is used to detect a second ignition signal of the right-side stove, and send the second ignition signal to the battery voltage detection circuit.

4. The cooker control device according to claim 1, characterized in that: The power supply circuit includes: a first micro switch, a first diode, a first resistor, a second resistor, a third resistor, a first transistor and a second transistor; One end of the first micro switch is connected to the battery voltage, and the other end of the first micro switch is connected to one end of the first diode; the other end of the first diode is connected to one end of the first resistor; the other end of the first resistor is respectively connected to one end of the second resistor and the base of the first transistor; the collector of the first transistor is connected to one end of the third resistor; the other end of the third resistor is connected to the base of the second transistor; The emitter of the second transistor is connected to the battery voltage, and the collector of the second transistor is connected to the circuit voltage; the other end of the second resistor and the emitter of the first transistor are grounded.

5. The cooker control device according to claim 4, characterized in that: The power supply circuit further includes: a second micro switch and a second diode; One end of the second micro switch is connected to the battery voltage, and the other end of the second micro switch is connected to one end of the second diode; the other end of the second diode is connected to one end of the first resistor.

6. The cooker control device according to claim 4, characterized in that: The power supply circuit further includes: a first capacitor; One end of the first capacitor is connected to one end of the first diode, the second diode and the first resistor respectively, and the other end of the first capacitor is grounded.

7. The cooker control device according to claim 1, characterized in that: The ignition signal detection circuit includes: a second capacitor, a fourth resistor, a fifth resistor, a third capacitor, a first MOS tube, and a sixth resistor; One end of the second capacitor is respectively connected to the micro switch of the power supply circuit and one end of the fifth resistor; one end of the fourth resistor is connected to one end of the fifth resistor; the other end of the fifth resistor is respectively connected to one end of the third capacitor and the gate of the first MOS tube; the drain of the first MOS tube is connected to one end of the sixth resistor; The other end of the second capacitor, the other end of the fourth resistor and the other end of the third capacitor are connected to the source of the first MOS tube; The other end of the sixth resistor is connected to the circuit voltage.

8. The cooker control device according to claim 7, characterized in that: The ignition signal detection circuit also includes a third diode; One end of the third diode is connected to the micro switch, and the other end of the third diode is connected to the source of the first MOS tube.

9. The cooker control device according to claim 1, characterized in that: The battery voltage detection circuit includes a seventh resistor, an eighth resistor, a ninth resistor and a fourth capacitor; One end of the seventh resistor is connected to the circuit voltage, and the other end of the seventh resistor is respectively connected to one end of the eighth resistor and one end of the ninth resistor; the other end of the eighth resistor is grounded; the other end of the ninth resistor is respectively connected to one end of the fourth capacitor and the interface for converting analog signals into digital signals; the other end of the fourth capacitor is grounded.

10. The cooker control device according to claim 1, characterized in that: The ignition control circuit includes a tenth resistor, an eleventh resistor, a third transistor, a twelfth resistor, a fourth transistor and a high-frequency magnetic bead; One end of the tenth resistor is connected to the battery voltage detection circuit, and the other end of the tenth resistor is respectively connected to one end of the eleventh resistor and the base of the third transistor; the collector of the third transistor is connected to one end of the twelfth resistor, and the other end of the twelfth resistor is connected to the base of the fourth transistor; the emitter of the fourth transistor is connected to the circuit voltage; the collector of the fourth transistor is connected to one end of the high-frequency magnetic bead; the other end of the high-frequency magnetic bead is connected to the igniter; The other end of the eleventh resistor and the emitter of the third transistor are grounded.

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