CN216647125U - Control circuit and cooking equipment - Google Patents
Control circuit and cooking equipment Download PDFInfo
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- CN216647125U CN216647125U CN202122640772.XU CN202122640772U CN216647125U CN 216647125 U CN216647125 U CN 216647125U CN 202122640772 U CN202122640772 U CN 202122640772U CN 216647125 U CN216647125 U CN 216647125U
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Abstract
The application discloses control circuit and cooking equipment. The control circuit comprises a gate detection module, a load module and a processing chip, wherein the gate detection module is connected with a power supply end, the processing chip and the load module, the load module is connected with the processing chip and the load, the processing chip is used for transmitting a driving signal to the load module according to a detection signal generated by the gate detection module in a normal state and stopping transmitting the driving signal to the load module in an abnormal state, and the load module is used for driving the load to work according to the driving signal and the detection signal of the processing chip. Therefore, through the arrangement of the door detection module, the load module and the processing chip, the circuit structure of the control circuit is simplified while the control circuit is ensured to meet the safety requirements, the cost is reduced, and the anti-interference capability of the control circuit is improved.
Description
Technical Field
The application relates to the field of household appliances, in particular to a control circuit and cooking equipment.
Background
At present, in order to meet the safety requirements, the control circuit of most microwave oven products generally comprises a safety circuit, an oven door detection circuit, a load driving circuit and an MCU chip, wherein the MCU chip is used to control the load control circuit to work, the safety circuit is used to control the load driving circuit to stop outputting when the MCU chip is in a dead state, and the oven door detection circuit is used to detect whether the oven door is opened or not to control the load driving circuit to stop outputting when the oven door is opened.
However, the overall control circuit has many circuit devices, so that the main control board has a large board layout area and high cost, and circuit devices such as capacitors are easily subjected to electromagnetic interference and have poor interference resistance under the condition of a severe surrounding environment.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. To this end, the present application provides a control circuit and a cooking apparatus.
The control circuit comprises a door detection module, a load module and a processing chip, wherein the door detection module is connected with a power supply end, the processing chip and the load module, and the load module is connected with the processing chip and a load;
the processing chip is used for transmitting a driving signal to the load module according to the detection signal generated by the gate detection module in a normal state and stopping transmitting the driving signal to the load module in an abnormal state, and the load module is used for driving the load to work according to the driving signal of the processing chip and the detection signal.
In some embodiments, the processing chip comprises:
a control unit;
the door detection unit is connected with the control unit and the door detection module and used for receiving a detection signal generated by the door detection module;
the driving unit is connected with the control unit and the load module and is used for transmitting a driving signal to the load module;
and the safety loop unit is connected with the control unit and the driving unit and is used for controlling the driving unit to transmit a driving signal.
In some embodiments, the door detection unit comprises:
the first pole of the first transistor is connected with the control unit, and the second pole of the first transistor is connected with the grounding end;
one end of the first resistor is connected with a grounding end, and the other end of the first resistor is connected with a third pole of the first transistor;
and one end of the second resistor is connected with the first resistor, and the other end of the second resistor is connected with the door detection module.
In some embodiments, the driving unit includes:
one end of the third resistor is connected with a grounding end, and the other end of the third resistor is connected with the control unit;
one end of the fourth resistor is connected with the control unit;
and a first pole of the second transistor is connected with a grounding end, a second pole of the second transistor is connected with the load module, and a third pole of the second transistor is connected with the fourth resistor.
In some embodiments, the safety circuit unit comprises:
one end of the fifth resistor is connected with a grounding end, and the other end of the fifth resistor is connected with the control unit;
one end of the watchdog is connected with the control unit;
and a third transistor, wherein a first pole of the third transistor is connected with a ground terminal, a second pole of the third transistor is connected with the driving unit, and a third pole of the third transistor is connected with the watchdog.
In some embodiments, the door detection module comprises:
one end of the door switch is connected with the power supply end, and the other end of the door switch is connected with the load module;
one end of the sixth resistor is connected with the processing chip;
and one end of the capacitor is connected with a grounding end, and the other end of the capacitor is connected with the door switch.
In some embodiments, the load module comprises a first load control subunit comprising:
one end of the first relay is connected with the door switch, and the other end of the first relay is connected with the processing chip;
and one end of the first diode is connected with the processing chip, and the other end of the first diode is connected with the door switch.
In some embodiments, the load module comprises a second load control subunit comprising:
one end of the second relay is connected with the door switch, and the other end of the second relay is connected with the processing chip;
and one end of the second diode is connected with the processing chip, and the other end of the second diode is connected with the door switch.
In some embodiments, the voltage of the power supply terminal is 12V.
The cooking device of the embodiment of the application comprises the control circuit.
In the control circuit and the cooking device of the embodiment of the application, the power supply end, the processing chip and the load module are connected through the door detection module, and the load module is connected with the processing chip and the load, so that the processing chip can transmit the driving signal to the load module according to the detection signal generated by the door detection module in a normal state and stop transmitting the driving signal to the load module in an abnormal state, and the load module can drive the load to work according to the driving signal and the detection signal of the processing chip. Therefore, the control circuit can be ensured to meet the safety requirements, the circuit structure of the control circuit is simplified, the cost is reduced, and the anti-interference capability of the control circuit is improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a control circuit of a related art microwave oven product.
Fig. 2 is a circuit diagram of a control circuit according to an embodiment of the present application.
Fig. 3 is a schematic circuit diagram of the inside of the processing chip according to the embodiment of the present application.
Fig. 4 is a schematic block diagram of a cooking apparatus according to an embodiment of the present application.
Reference numerals of main elements
The control circuit 10, the circuit board 101, the power terminal 1011 and the ground terminal GND;
the door detection module 12, the door switch 121, the sixth resistor R6 and the capacitor C;
the safety circuit comprises a processing chip MCU, a control unit 162, a gate detection unit 164, a first transistor T1, a first resistor R1, a second resistor R2, a driving unit 166, a third resistor R3, a fourth resistor R4, a second transistor T2, a safety circuit unit 168, a fifth resistor R5, a third transistor T3, a watchdog WD, a display unit 161, a pulse signal output unit 163, a seventh resistor R7, an eighth resistor R8 and a fourth transistor T4;
drive pin OC, gate pin DOOR;
the cooking apparatus 100.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
According to the safety requirements, when the MCU chip of the microwave oven product is halted, the microwave output of the product must be stopped, so as to avoid potential safety hazards. Also, since microwave leakage is easily harmful to users, it is required that the product should stop the operation of the microwave when the door is opened.
Referring to fig. 1, in the related art, according to the safety requirements, the control circuit of most microwave oven products generally comprises a safety circuit, an oven door detection circuit, a load driving circuit and an MCU chip. The load driving circuit is connected with the loads such as the microwave and the barbecue tube and is used for driving the loads to work. The MCU chip is used for controlling the load control loop to drive the load to work, the safety loop is used for controlling the load drive loop to stop outputting when the MCU chip is in a dead state, and the furnace door detection loop is used for detecting whether the furnace door is opened or not to control the load drive loop to stop outputting when the furnace door is opened.
Specifically, please further refer to fig. 1, when the MCU chip is in normal operation, the SAFE _ PWM pin of the MCU chip outputs a PWM signal to the safety loop, so that the PWM signal charges the capacitor E15 through the capacitor C15 of the safety loop, and the transistor Q9 of the safety loop is turned on, when the Door (Door) is closed, the control circuit forms a closed loop, and the 12V power supply supplies power to the relay RLY2 and RLY3 connected to the load through the transistor Q9, and at this time, the MCU chip can control the load through the transistor Q6 and the transistor Q7 of the load driving loop. When the MCU chip is halted, the safety loop cannot receive the PWM signal of the MCU, therefore, the triode Q9 is turned off, the control circuit cannot form a closed loop, the power supply 12V cannot supply power to the relays RLY2 and RLY3, and the load driving loop stops outputting. When Door is turned on, the control circuit cannot form a closed loop, the power supply 12V cannot supply power to the relay RLY2 and RLY3, and the load driving loop stops outputting.
However, the overall control circuit has many circuit devices, so that the layout area of the main control board is large, the cost is high, and the circuit devices are prone to failure due to electromagnetic interference under the condition that the surrounding environment is severe because of many circuit devices, for example, when a circuit capacitor is subject to electromagnetic interference, the capacitance of the capacitor is reduced, and the risk of failure is prone to being caused.
In view of this, please refer to fig. 2, an embodiment of the present application provides a control circuit 10, where the control circuit 10 includes a gate detection module 12, a load module 14, and a processing chip MCU. The door detection module 12 is connected with a power supply end, a processing chip MCU and a load module 14, and the load module 14 is connected with the processing chip MCU and a load.
The processing chip MCU is configured to transmit a driving signal to the load module 14 according to the detection signal generated by the gate detection module 12 in a normal state, and stop transmitting the driving signal to the load module 14 in an abnormal state, and the load module 14 is configured to drive the load to operate according to the driving signal and the detection signal of the processing chip MCU.
In the control circuit 10 of the embodiment of the present application, the gate detection module 12 is connected to the power source terminal 1011, the processing chip MCU and the load module 14, and the load module 14 is connected to the processing chip MCU and the load, so that the processing chip MCU can transmit the driving signal to the load module 14 according to the detection signal generated by the gate detection module 12 in the normal state, and stop transmitting the driving signal to the load module 14 in the abnormal state, and the load module 14 can drive the load to operate according to the driving signal and the detection signal of the processing chip MCU. Therefore, the control circuit 10 simplifies the circuit structure of the control circuit 10 while ensuring that the control circuit 10 meets the safety requirements, so that the board distribution area of the control circuit 10 can be reduced, the cost of the control circuit 10 is reduced, and the anti-interference capability of the control circuit 10 is improved.
The control circuit 10 of the present application is used in an electric device, for example, the electric device may be a cooking device such as a microwave oven, an induction cooker, or an oven. For example, in the present embodiment, the electric device may be a microwave oven.
Referring to fig. 2, the structure of the control circuit 10 will be described in detail.
The control circuit 10 may include a circuit board 101. The door detection module 12, the load control module 14 and the processing chip MCU are disposed on the circuit board 101.
Specifically, the circuit board 101 may include a power terminal 1011 and a ground terminal GND, the power terminal 1011 may serve as a power input terminal of the control circuit 10, the power terminal 1011 may supply a power having a voltage of 12V, and the ground terminal GND may be grounded.
The door detection module 12 includes a door switch 121, a sixth resistor R6, and a capacitor C.
The door switch 121 may be an oven door of the electric device, and when the oven door of the electric device is closed, that is, the door switch 121 is closed, and when the oven door of the electric device is opened, the door switch 121 is opened.
One end of the gate switch 121 is connected to the power source terminal 1011, the other end of the gate switch 121 is connected to the load module 14, one end of the sixth resistor R6 and one end of the capacitor C, and the other end of the sixth resistor R6 is connected to the processing chip MCU. The other end of the capacitor C is grounded.
It can be understood that when the door switch 121 is closed, the door detection module 12 is connected to the load module 14 and the processing chip MCU, and the power source terminal 1011 can transmit a power source with a voltage of 12V to the load module 14 and the processing chip MCU respectively.
The load of the consumer may comprise a first sub-load, which in this embodiment may be a magnetron for generating microwaves, and a second sub-load, which may be a cooking tube for generating heat. The load module 14 includes a first load control subunit 142 and a second load control subunit 144, where the first load control subunit 142 is connected to the first sub-load, the gate detection module 12 and the processing chip MCU for driving the first sub-load to work, and the second load control subunit 144 is connected to the second sub-load, the gate detection module 12 and the processing chip MCU for driving the second sub-load to work.
Further, the first load control subunit 142 includes a first relay RLY2 and a first diode D1, and the first relay RLY2 and the first diode D1 are connected in parallel. One end of the first relay RLY2 and one end of the first diode D1 are connected with the gate switch 121, and one end of the first relay RLY2 and the other end of the first diode D1 are connected with the processing chip MCU. When the first load control subunit 142 is connected to the power source terminal 1011, the first load is driven to operate according to the driving signal of the processing chip MCU.
The second load control subunit 144 includes a second relay RLY3 and a second diode D2, and the second relay RLY3 and the second diode D2 are connected in parallel.
One end of the second relay RLY3 and one end of the first diode D1 are connected with the gate switch 121, and one end of the second relay RLY3 and the other end of the second diode D2 are connected with the processing chip MCU. Under the condition that the second load control sub-unit 144 is conducted with the power source terminal 1011, the second sub-load may be driven to operate according to the driving signal transmitted by the processing chip MCU.
Referring to fig. 3, the processing chip MCU includes a plurality of gate pins DOOR and a plurality of driving pins OC. The gate pin DOOR is connected to the gate detection module 12, and the driving pin OC is connected to the load module 14.
The processing chip MCU is integrated with a control unit 162, a door detection unit 164, a driving unit 166 and a safety loop unit 168. The control unit 162 is connected to the door detection unit 164, the driving unit 166, and the safety circuit unit 168, respectively, and the safety circuit unit 168 is further connected to the driving unit 166. The processing chip MCU is connected to the gate pin DOOR through the gate detection unit 164 to connect to the gate detection module 12, and connected to the driving pin OC through the driving unit 166 to connect to the load module 14.
Therefore, the door detection unit 164, the driving unit 166 and the safety loop unit 168 are integrated in the processing chip MCU, so that the failure of peripheral devices such as the existing circuit capacitor C can be avoided, the interference of microwave signals on the circuit devices can be effectively avoided and reduced, and the anti-interference capability and reliability of the control circuit 10 are improved.
The door detection unit 164 is used for receiving the detection signal of the door detection module 12. It should be noted that the detection signal is a state signal of the door switch 121, and it is understood that when the door switch 121 is turned off, the power source terminal 1011 is turned on by the door detection module 12 and the door detection unit 164, the voltage detected by the door detection unit 164 is not zero, when the door switch 121 is turned on, the power source terminal 1011 is turned off from the door detection unit 164, and the voltage detected by the door is zero, so that the voltage received by the door detection unit 164 can determine the on state of the door switch 121.
In addition, it can be understood that the gate detection unit 164 is integrated in the processing chip MCU, and when the gate switch 121 is closed, the gate detection unit 164 is turned on with the power source terminal 1011, and the power source of the power source terminal 1011 is 12V, so that in this embodiment, the processing chip MCU can directly input the power source with the voltage of 12V through the gate detection unit 164.
Further, the gate detecting unit 164 includes a first transistor T1, a first resistor R1, and a second resistor R2. A first pole of the first transistor T1 is connected to the control unit 162, a second pole of the first transistor T1 is connected to the ground GND, a third pole of the first transistor T1 is connected to the second resistor R2, one end of the first resistor R1 is connected to the ground GND, the other end of the first resistor R1 is connected to the third pole of the first transistor T1, one end of the second resistor R2 is connected to the first resistor R1, the other end of the second resistor R2 is connected to the gate pin DOOR to connect the gate detection module 12, and the resistance of the first resistor R1 may be half of the resistance of the second resistor R2.
In this embodiment, the transistor may be a triode, and the first pole may be an emitter, the second pole may be a base, and the third pole may be a collector.
The driving unit 166 is used for transmitting a driving signal to the driving pin OC. The driving unit 166 includes a plurality of driving units, and each driving unit 166 is connected to a corresponding driving pin OC. Each of the driving units 166 includes a third resistor R3, a fourth resistor R4, and a second transistor T2. One end of the third resistor R3 is connected to the ground GND, the other end is connected to the control unit 162, one end of the fourth resistor R4 is connected to the control unit 162, and the other end of the fourth resistor R4 is connected to the second transistor T2. A first pole of the second transistor T2 is connected to the ground GND, a second pole of the second transistor T2 is connected to the driving pin OC, and a third pole of the second transistor T2 is connected to the fourth resistor R4.
The safety loop unit 168 is configured to detect a state of the processing chip MCU, and generate a control signal to control the driving unit 166 to stop transmitting the driving signal to the driving pin OC in an abnormal state (e.g., a dead halt) of the processing chip MCU.
Specifically, the safety loop unit 168 includes a fifth resistor R5, a third transistor T3, and a watchdog WD. One end of the fifth resistor R5 is connected to the ground GND, the other end of the fifth resistor R5 is connected to the control unit 162, one end of the watchdog WD is connected to the control unit 162, and the other end of the watchdog WD is connected to the third transistor. The third transistor T3 includes a plurality of transistors, a first pole of each of the third transistors T3 is connected to the ground GND, a second pole of the third transistor T3 is connected to one of the driving pins OC, and a third pole of the third transistor T3 is connected to the watchdog WD.
It should be noted that the watchdog WD is a timer circuit, and generally has an input and an output, where the input is called a feeding dog, and the output is generally connected to the reset terminal of another part, and generally connected to the single chip microcomputer. The function of the watchdog is to periodically check the internal conditions of the chip and send a restart signal to the chip in case of an error. The watchdog command has the highest priority among the interrupts of the program.
It can be understood that, because the operation of the processing chip MCU is often interfered by an external electromagnetic field, data confusion of various registers and memories may be caused, a program pointer may be wrong, the processing chip MCU is not in a program area, a wrong program instruction may be fetched, and the like, which may result in a dead loop, a normal operation of the program may be interrupted, a system controlled by the processing chip MCU may not continue to operate normally, resulting in a dead state of the whole system, and an unpredictable effect may occur. Therefore, by looking at the internal condition of the processing chip through the watchdog WD, the driving unit 166 can be controlled to stop transmitting the driving signal to the load module 14 outside the processing chip MCU in case of abnormality of the processing chip MCU 2.
Referring to fig. 3, in some embodiments, the processing chip MCU further includes a display unit 161, and the display unit 16 is connected to the control unit 162. The display unit 161 is used for displaying when the processing chip MCU is abnormal or the door detection module 162 detects that the door switch is not closed. For example, the display unit 161 may be connected with an LED lamp, and the LED lamp is turned on when the processing chip MCU crashes.
Therefore, according to the application, through the setting of the display unit 161 in the processing chip MUC, when the processing chip MCU is abnormal or the door detection module 162 detects that the door switch is not closed, the peripheral device (such as an LED lamp) can be controlled to send an abnormal prompt of the processing chip MCU or send a prompt of opening the furnace door, so that a user can know that the processing chip MCU is abnormal or the furnace door is opened in time, and the user experience is improved.
Referring to fig. 3, in some embodiments, the processing chip MCU further includes a pulse signal output unit 163, and the pulse signal output unit 163 may be configured to output a pulse width modulation signal PWM. The pulse signal output unit 163 may be connected to a buzzer disposed outside the processing chip MCU through a driving pin, and transmit the pulse width modulation signal PWM to issue an alarm when the processing chip MCU is abnormal. Therefore, a user can clearly know whether the control circuit is abnormal or not.
The pulse signal output unit 163 includes a seventh resistor R7, an eighth resistor R8, and a fourth transistor T4. One end of the seventh resistor is connected to the ground GND, the other end is connected to the fourth transistor T4, the first pole of the fourth transistor T4 is connected to the ground GND, the second pole is connected to the driving pin OC, and the third pole is connected to the control unit 162.
Referring to fig. 4, the present application further provides a cooking apparatus 100, and the cooking apparatus 100 includes the control circuit 10. The control circuit 10 is used for filtering out electromagnetic interference on a power line in the cooking apparatus 100 to improve EMC effect of the cooking apparatus 100.
The cooking apparatus 100 may be, but is not limited to, an oven, a steam box, a combined steaming and baking machine, a microwave oven, or the like. For example, in the present application, the cooking apparatus 100 may be a microwave oven.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control circuit is characterized by comprising a door detection module, a load module and a processing chip, wherein the door detection module is connected with a power supply end, the processing chip and the load module, and the load module is connected with the processing chip and a load;
the processing chip is used for transmitting a driving signal to the load module according to the detection signal generated by the gate detection module in a normal state and stopping transmitting the driving signal to the load module in an abnormal state, and the load module is used for driving the load to work according to the driving signal of the processing chip and the detection signal.
2. The control circuit of claim 1, wherein the processing chip comprises:
a control unit;
the door detection unit is connected with the control unit and the door detection module and used for receiving a detection signal generated by the door detection module;
the driving unit is connected with the control unit and the load module and is used for transmitting a driving signal to the load module;
and the safety loop unit is connected with the control unit and the driving unit and is used for controlling the driving unit to transmit a driving signal.
3. The control circuit of claim 2, wherein the gate detection unit comprises:
the first pole of the first transistor is connected with the control unit, and the second pole of the first transistor is connected with the grounding end;
one end of the first resistor is connected with a grounding end, and the other end of the first resistor is connected with a third pole of the first transistor;
and one end of the second resistor is connected with the first resistor, and the other end of the second resistor is connected with the door detection module.
4. The control circuit of claim 2, wherein the driving unit comprises:
one end of the third resistor is connected with a grounding end, and the other end of the third resistor is connected with the control unit;
one end of the fourth resistor is connected with the control unit;
and a first pole of the second transistor is connected with a grounding end, a second pole of the second transistor is connected with the load module, and a third pole of the second transistor is connected with the fourth resistor.
5. The control circuit of claim 2, wherein the safety loop unit comprises:
one end of the fifth resistor is connected with a grounding end, and the other end of the fifth resistor is connected with the control unit;
one end of the watchdog is connected with the control unit;
and a third transistor, wherein a first pole of the third transistor is connected with a ground terminal, a second pole of the third transistor is connected with the driving unit, and a third pole of the third transistor is connected with the watchdog.
6. The control circuit of claim 1, wherein the gate detection module comprises:
one end of the door switch is connected with the power supply end, and the other end of the door switch is connected with the load module;
one end of the sixth resistor is connected with the door switch, and the other end of the sixth resistor is connected with the processing chip;
and one end of the capacitor is connected with a grounding end, and the other end of the capacitor is connected with the door switch.
7. The control circuit of claim 6, wherein the load module comprises a first load control subunit, the first load control subunit comprising:
one end of the first relay is connected with the door switch, and the other end of the first relay is connected with the processing chip;
and one end of the first diode is connected with the processing chip, and the other end of the first diode is connected with the gate switch.
8. The control circuit of claim 6, wherein the load module includes a second load control subunit, the second load control subunit including:
one end of the second relay is connected with the door switch, and the other end of the second relay is connected with the processing chip;
and one end of the second diode is connected with the processing chip, and the other end of the second diode is connected with the door switch.
9. The control circuit according to claim 1, wherein the voltage of the power source terminal is 12V.
10. A cooking device, characterized in that the cooking device comprises a control circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122640772.XU CN216647125U (en) | 2021-10-29 | 2021-10-29 | Control circuit and cooking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122640772.XU CN216647125U (en) | 2021-10-29 | 2021-10-29 | Control circuit and cooking equipment |
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| Publication Number | Publication Date |
|---|---|
| CN216647125U true CN216647125U (en) | 2022-05-31 |
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| CN202122640772.XU Active CN216647125U (en) | 2021-10-29 | 2021-10-29 | Control circuit and cooking equipment |
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| CN (1) | CN216647125U (en) |
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2021
- 2021-10-29 CN CN202122640772.XU patent/CN216647125U/en active Active
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