阅读说明：本技术 驱动芯片和烹饪器具 (Drive chip and cooking utensil ) 是由 余远昌 于 2021-10-29 设计创作，主要内容包括：本发明提出了一种驱动芯片和烹饪器具,驱动芯片包括：负载控制电路、炉门状态检测电路、安全回路以及第一三极管,其中,第一三极管的第一端与负载控制电路连接,第一三极管的第二端与炉门状态检测电路连接,第一三极管的控制端与安全回路连接。本发明提出的驱动芯片,将烹饪器具的炉门检测、安全回路、负载控制等驱动电路,重新设计优化,集成为一体的驱动芯片,降低了驱动电路在烹饪器具的控制板的占用面积,便于降低控制板的成本,同时由于驱动电路集成在一起,相对于未集成前的状态,其抗干扰的能力有所提高,进一步保证了应用驱动芯片的烹饪器具的可靠性。(The invention provides a driving chip and a cooking utensil, wherein the driving chip comprises: the oven door state detection circuit comprises a load control circuit, an oven door state detection circuit, a safety circuit and a first triode, wherein the first end of the first triode is connected with the load control circuit, the second end of the first triode is connected with the oven door state detection circuit, and the control end of the first triode is connected with the safety circuit. According to the driving chip provided by the invention, the driving circuits of the cooking appliance such as the oven door detection, the safety loop, the load control and the like are redesigned and optimized, and are integrated into a driving chip, so that the occupied area of the driving circuit on a control panel of the cooking appliance is reduced, the cost of the control panel is convenient to reduce, meanwhile, as the driving circuits are integrated together, the anti-interference capability is improved compared with the state before integration, and the reliability of the cooking appliance applying the driving chip is further ensured.)

1. A driver chip, wherein the driver chip is integrated with:

a load control circuit, a furnace door state detection circuit, a safety loop and a first triode,

the first end of the first triode is connected with the load control circuit, the second end of the first triode is connected with the furnace door state detection circuit, and the control end of the first triode is connected with the safety circuit.

2. The driver chip of claim 1, wherein the load control circuit comprises:

each of the N first load control branches comprises a second triode, a first end of the second triode is used for being connected with a control loop of a first load, a second end of the second triode is connected with a first end of the first triode, a control end of the second triode is used for receiving a control signal of the first load,

the second end of the first triode is connected with the furnace door state detection circuit, the control end of the first triode is connected with the safety circuit, and N is a positive integer greater than or equal to 1.

3. The driver chip of claim 2, wherein the first load control branch further comprises:

a first freewheeling device connected with a first end of the second triode.

4. The driver chip of claim 2, wherein the safety loop comprises:

a first end of the third triode is used for being connected with a first power supply, and a second end of the third triode is connected with the control end of the first triode;

a first end of the first resistor is connected with a first end of the third triode, and a second end of the first resistor is connected with a control end of the third triode;

and the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is used for receiving a safety signal.

5. The driver chip of claim 4, wherein the load control circuit further comprises:

the load control circuit comprises M second load control branches, each second load control branch comprises O fourth triodes, the first end of each fourth triode is used for being connected with a control loop of a second load, the second end of each fourth triode is grounded, the control end of each fourth triode is connected with the second end of each third triode, and M, O is a positive integer greater than or equal to 1.

6. The driver chip of claim 5, wherein any of the second load control branches further comprises:

the third resistors are in one-to-one correspondence with the fourth triodes, the first ends of the third resistors are connected with the control ends of the fourth triodes, and the second ends of the third resistors are grounded.

7. The driver chip of claim 6, wherein any of the second load control branches further comprises:

and the fourth resistor is connected between the control end of the fourth triode and the second end of the fourth triode in series.

8. The driver chip of claim 5, wherein any of the second load control branches further comprises:

a second freewheeling device connected with a first end of the fourth triode.

9. The driving chip according to claim 2, wherein the door state detection circuit comprises:

a second power supply;

a fifth resistor, a first end of the fifth resistor being connected to the second power supply;

a first diode, an anode of the first diode is connected with a second end of the fifth resistor, a cathode of the first diode is connected with a second end of the first triode, and a second end of the fifth resistor is used for outputting the opening and closing state of the furnace door switch,

and the second end of the first triode is connected with the oven door switch.

10. The driver chip according to any one of claims 1 to 9, wherein the driver chip further comprises:

i load driving circuits, each of the load driving circuits comprising:

the first end of the fifth triode is used for being connected with a third load, the second end of the fifth triode is grounded, the control end of the fifth triode is used for receiving a control signal of the third load, and I, P is a positive integer larger than or equal to 1.

11. The driver chip of claim 10, wherein any of the load driving circuits further comprises:

the P sixth resistors correspond to the fifth triodes one by one, a first end of each sixth resistor is connected with a control end of the fifth triode, and a second end of each sixth resistor is grounded.

12. The driver chip of claim 11, wherein any of the load driving circuits further comprises:

and the seventh resistor is connected between the control end of the fifth triode and the second end of the fifth triode in series.

13. The driver chip of claim 11, further comprising:

and a first end of the eighth resistor is connected with the control end of the first triode, and a second end of the eighth resistor is grounded.

14. The driver chip according to claim 10, wherein one of the I load driving circuits is configured to drive a buzzer.

15. A cooking appliance, comprising:

the driver chip of any one of claims 1 to 14;

and the first end of the first capacitor is connected with the control end of the first triode of the driving chip, and the second end of the first capacitor is grounded.

Technical Field

The invention relates to the technical field of integrated circuit chips, in particular to a driving chip and a cooking appliance.

Background

The MCU (Microcontroller Unit micro control Unit) of the existing cooking appliance has a plurality of driving circuit devices for controlling the load, and the main control board has large board layout area, high cost and poor anti-interference capability.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present invention is to provide a driving chip.

In a second aspect of the invention, a cooking appliance is also provided.

In view of this, according to a first aspect of the present invention, there is provided a driving chip integrated with: load control circuit, furnace gate state detection circuitry, safety circuit and first triode.

Specifically, the first end and the load control circuit of first triode are connected, and the second end and the furnace gate state detection circuit of first triode are connected, and the control end and the safety circuit of first triode are connected.

In the driving chip provided by the invention, the furnace door state detection circuit is used for determining whether a furnace door switch is closed, the safety circuit is used for inputting signals to the control end of the first triode so as to control the conduction state of the first triode, and the load control circuit is used for controlling the running state of a load.

The load control circuit and the oven door state detection circuit are respectively connected with the first end and the second end of the first triode, so that the operation of the load control circuit and the oven door state detection circuit are combined, and meanwhile, the operation of the load control circuit and the safety circuit are linked based on the connection relation of the safety circuit and the first triode, so that the operation reliability of the load control circuit is improved.

Further, an NPN transistor may be selected as the first transistor, wherein a collector of the NPN transistor is used as a first end of the first transistor, an emitter of the NPN transistor is used as a second end of the first transistor, and a base of the NPN transistor is used as a control end of the first transistor.

Furthermore, the number of the first triodes can be multiple, and any two first triodes are connected in parallel, namely, the first end of the first triode a is connected with the first end of the first triode b, the second end of the first triode a is connected with the second end of the first triode b, and the control end of the first triode a is connected with the control end of the first triode b, so that the load carrying capacity of the load control circuit is increased.

According to the driving chip provided by the invention, the driving circuits of the cooking appliance such as the oven door detection, the safety loop, the load control and the like are redesigned and optimized to be integrated into the driving chip, so that the occupied area of the driving circuit on the control panel of the cooking appliance is reduced, and the cost of the control panel is conveniently reduced.

Because the driving circuits are integrated, the anti-interference capability is improved compared with the state before the driving circuits are integrated, and therefore, the reliability of the cooking utensil applying the driving chip can be improved.

In addition, the driving chip provided by the above technical solution of the present invention further has the following additional technical features:

in the above technical solution, the load control circuit includes: the furnace door state detection device comprises N first load control branch circuits, wherein each first load control branch circuit comprises a second triode, the first end of each second triode is used for being connected with a control circuit of a first load, the second end of each second triode is connected with the first end of each first triode, the control end of each second triode is used for receiving a control signal of the first load, the second end of each first triode is connected with the furnace door state detection circuit, the control end of each first triode is connected with the safety circuit, and N is a positive integer greater than or equal to 1.

In this technical scheme, the load control circuit includes N first load control branches, and every first load control branch includes the second triode, and wherein, the first end of second triode is connected with the control circuit of first load, and the second end of second triode is connected with the first end of first triode, and the control end of second triode is used for receiving the control signal of first load.

Specifically, under the condition that the control end of the second triode receives the control signal of the first load, the first end and the second end of the third triode are conducted, and due to the existence of the first triode, the operation of the control loop of the first load is also controlled by the first triode, namely, the control of the safety loop and the oven door state detection circuit, so that the operation safety of the control loop of the first load can be improved, and the operation starting probability of the control loop of the first load under the condition that the oven door of the cooking appliance is in an open state and/or the safety loop does not output signals is reduced.

In any of the above solutions, the control circuit of the first load includes, for example, a relay, and it is understood that the relay is used for controlling whether the first load operates, and specifically, the relay is connected in series with the power supply circuit of the first load.

In one technical scheme, when the furnace door state detection circuit detects that the furnace door switch is in a closed state, and the safety circuit determines that the safety signal is received, the first triode is conducted, and at the moment, if the driving chip receives a control signal of the first load, the second triode is conducted, so that the first load control branch can drive the corresponding load equipment to operate, and control over different load equipment through the driving chip is realized.

Further, an NPN transistor may be selected as the second transistor, wherein a collector of the NPN transistor is used as a first end of the second transistor, an emitter of the NPN transistor is used as a second end of the second transistor, and a base of the NPN transistor is used as a control end of the second transistor.

Further, the number N of the first load control branches in the load control circuit, where N is an integer greater than 1, is used to control a plurality of load devices, and specifically, the first load control branch is used to drive a load device with an extremely high safety requirement, such as: microwave generators, heating elements, etc. of microwave ovens.

In any of the above solutions, the heating component includes, but is not limited to, a heating pipe, and may also be a steam generating device.

In the above technical scheme, the first load control branch further includes a first freewheeling original, and the first freewheeling original is connected with the first end of the second triode.

In the technical scheme, a first follow current element is further arranged in the first load control branch and connected with a first end of the second triode, and when the second triode is disconnected, the first follow current element can release residual electric energy in a circuit, so that the reliability of the driving chip is improved.

Further, a diode can be selected as the first follow current element, specifically, the anode of the diode is connected with the first end of the second triode, the cathode of the diode is connected with the power supply, and the diode has the characteristics of forward conduction and reverse cut-off, so that when the second triode is disconnected, the first follow current element can release residual electric energy in a circuit, induced voltage cannot flow back to the second triode, the second triode is prevented from being broken down, and the operation reliability of the second triode is improved.

In the above technical solution, the safety circuit includes: the first end of the third triode is used for being connected with the first power supply, and the second end of the third triode is connected with the control end of the first triode; the first end of the first resistor is connected with the first end of the third triode, and the second end of the first resistor is connected with the control end of the third triode; and the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is used for receiving the safety signal.

In the technical scheme, the safety circuit comprises a third triode, wherein the first end of the third triode is connected with the first power supply, and the second end of the third triode is connected with the control end of the first triode.

In one embodiment, the safety signal may be a signal generated based on the closing of the oven door, a signal generated when the oven door switch is in a closed state, or a signal generated by a cooking appliance to which the driving chip is applied.

In one embodiment, the signal generated by the cooking appliance using the driving chip may be a signal generated when the self-test of the cooking appliance passes.

In one of the technical schemes, under the condition that the safety signal is a signal generated when the furnace door switch is in a closed state, when the furnace door switch is determined to be closed by the safety circuit secondary, the third triode is conducted, and because the second end of the third triode is connected with the control end of the first triode, the voltage at the control end of the first triode is larger than the conducting voltage of the first triode, so that the first triode is conducted, the first triode can be conducted only when the safety circuit secondary determines that the furnace door switch is in a closed state, and the reliability of the operation of the driving chip is improved.

Specifically, the first power supply is a +5V power supply.

Further, a PNP-type triode may be selected as the third triode, wherein an emitter of the PNP-type triode is used as the first end of the first triode, a collector of the PNP-type triode is used as the second end of the third triode, and a base of the PNP-type triode is used as the control end of the third triode.

Further, the safety circuit further comprises a first resistor and a second resistor, the first resistor is connected between the first end of the third triode and the control end in parallel, the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is used for receiving a safety signal, the first power supply can form a voltage drop on the first resistor and the third resistor, and by reasonably setting values of the first resistor and the second resistor, the first triode is controlled to be conducted under the condition that the safety signal is low voltage or has no input, the input is not required to be maintained all the time, and therefore the power consumption of the driving chip is reduced.

In any of the above technical solutions, values of the first resistor and the third resistor are determined according to a type of the third triode and/or a supply voltage of the first voltage, and specific values thereof are not limited herein.

In the above technical solution, the load control circuit further includes: m second load control branches, each second load control branch includes O fourth triodes, the first end of fourth triode is used for being connected with the control circuit of second load, the second end ground connection of fourth triode, the control end of fourth triode and the second end connection of third triode, wherein, M, O is the positive integer that is more than or equal to 1.

In the technical scheme, the load control circuit comprises M second load control branches, each second load control branch comprises O fourth triodes, wherein the first end of each fourth triode is connected with the control loop of the second load, the control end of each fourth triode is connected with the second end of each third triode,

in this technical scheme, second load control branch road difference and first load control branch road, its control need not to receive the control of first triode, promptly, the voltage of output satisfies the turn-on voltage of fourth triode at the second end of third triode and can switch on, consequently, can utilize second load control branch road to drive the higher load of factor of safety.

In the technical scheme of this application, integrated second load control branch road in driver chip need not to integrate this type of drive circuit once more on using driver chip's the control panel, consequently, can reduce the area of control panel, simultaneously, has also improved this type of drive circuit's interference killing feature, has improved the reliability of using driver chip's cooking utensil.

In one of the technical solutions, when the third transistor in the safety circuit is turned on, the fourth transistor can be turned on, and the second load control branch can drive the corresponding load device to operate.

Further, an NPN transistor may be selected as the fourth transistor, wherein a collector of the NPN transistor is used as a first end of the fourth transistor, an emitter of the NPN transistor is used as a second end of the fourth transistor, and a base of the NPN transistor is used as a control end of the fourth transistor.

Further, the number of the second load control branches in the load control circuit is M, where M is an integer greater than 1, and is used to control a plurality of load devices, specifically, the second load control branch is used to drive a load device with a higher safety requirement, specifically, the second load control branch may be used to drive, for example: motors of microwave ovens, etc.

In the above technical solution, any one of the second load control branches further includes: the first end of the third resistor is connected with the control end of the fourth triode, and the second end of the third resistor is grounded.

In any of the above technical solutions, O is a positive integer greater than or equal to 1.

In this technical scheme, the control end of any one fourth triode all is connected with the third resistance of one end ground connection, through setting up the third resistance to under the condition that the fourth triode is not used, its control end is in the ground state, only under the condition that the voltage at the second end department of third triode exceeds the turn-on voltage of fourth triode, the fourth triode just switches on, promptly, only switches on at the high level, thereby reduces driver chip's consumption.

In the above technical solution, any one of the second load control branches further includes: and the fourth resistor is connected between the control end of the fourth triode and the second end of the fourth triode in series.

In the technical scheme, the fourth resistor is connected in series between the control end and the second end of the fourth triode and used for eliminating leakage current and improving the operation reliability of the second load control branch circuit.

In the above technical solution, any one of the second load control branches further includes: and the second follow current device is connected with the first end of the fourth triode.

In the technical scheme, a second follow current element is further arranged in the second load control branch and connected with the first end of the fourth triode, and when the second triode is disconnected, the second follow current element can release residual electric energy in a circuit, so that the reliability of the driving chip is improved.

Further, a diode can be selected as the second follow current element, specifically, the anode of the diode is connected with the first end of the fourth triode, the cathode of the diode is connected with the power supply, and the diode has the characteristics of forward conduction and reverse cut-off, so that when the fourth triode is disconnected, the second follow current element can release residual electric energy in a circuit, induced voltage cannot flow back to the fourth triode, the fourth triode is prevented from being broken down, and the operation reliability of the fourth triode is improved.

In the above technical solution, the oven door state detection circuit includes: a second power supply; a first end of the fifth resistor is connected with the second power supply; a first diode, the anode of which is connected with the second end of the fifth resistor, the cathode of which is connected with the second end of the first triode, the second end of the fifth resistor is used for outputting the open-close state of the furnace door switch,

in this technical solution, the oven door state detection circuit includes a second power supply, specifically, the second power supply is a +5V power supply.

Furthermore, the furnace door state detection circuit also comprises a fifth resistor, wherein the first end of the fifth resistor is connected with the second power supply, and the second end of the fifth resistor is used for outputting the opening and closing state of the furnace door switch.

Specifically, by detecting the potential of the second end of the fifth resistor, the opening and closing state of the oven door switch can be determined.

Furthermore, the oven door state detection circuit further comprises a first diode, the anode of the first diode is connected with the second end of the fifth resistor, and the cathode of the first diode is connected with the second end of the first triode.

Specifically, the first diode is reversely connected with the second end of the first triode in series, and due to the fact that the first diode has the characteristics of forward conduction and reverse cutoff, the interference of the signal of the second end of the first triode on the detection signal of the second end of the fifth resistor is avoided, the accuracy of the signal of the second end of the fifth resistor is guaranteed, the potential signal of the second end of the fifth resistor is guaranteed to be detected, whether the furnace door switch is closed or not can be accurately judged, and the reliability of operation of the driving chip is further improved.

In the above technical solution, the driving chip further includes: i load driving circuits, each load driving circuit comprising: and P fifth triodes, wherein a first end of each fifth triode is used for being connected with the third load, a second end of each fifth triode is grounded, and a control end of each fifth triode is used for receiving a control signal of the third load, wherein I, P is a positive integer greater than or equal to 1.

In the technical scheme, the load driving circuit comprises P fifth triodes, a first end of each fifth triode is connected with the third load, a second end of each fifth triode is grounded, and a control end of each fifth triode is used for receiving a control signal of the third load.

Specifically, when the control end of the fifth triode receives a control signal of the third load, the fifth triode is conducted, the load driving circuit can drive the corresponding load device to operate, different load devices can be controlled through the driving chip, and devices used by the peripheral driving circuit are reduced.

Further, an NPN transistor may be selected as the fifth transistor, wherein a collector of the NPN transistor is used as a first end of the fifth transistor, an emitter of the NPN transistor is used as a second end of the fifth transistor, and a base of the NPN transistor is used as a control end of the fifth transistor.

Further, the number of the load driving circuits in the driving chip is I, where I is an integer greater than 1, and is used to control a plurality of load devices, specifically, the load driving circuit is used to drive a load device with a low safety requirement, and specifically, the load driving circuit may be used to drive, for example: a display screen of the microwave oven, a buzzer and other load devices.

In the above technical solution, any one of the load driving circuits further includes: p sixth resistors correspond to the fifth triodes one by one, the first ends of the sixth resistors are connected with the control end of the fifth triode, and the second ends of the sixth resistors are grounded.

In this technical solution, the control end of any one of the fifth triodes is connected with a sixth resistor having one end grounded, and by setting the sixth resistor, the control end of the fifth triode is in a grounded state, that is, is turned on only at a high level when the fifth triode is not in use, so as to reduce the power consumption of the driver chip.

In the above technical solution, any one of the load driving circuits further includes: and the seventh resistor is connected between the control end of the fifth triode and the second end of the fifth triode in series.

In the technical scheme, the seventh resistor is connected in series between the control end and the second end of the fifth triode and used for eliminating leakage current and improving the operation reliability of the load driving circuit.

In the above technical solution, the driving chip further includes: and the first end of the eighth resistor is connected with the control end of the first triode, and the second end of the eighth resistor is grounded.

In the technical scheme, the control end of the first triode is connected with the eighth resistor with one end grounded, and the control end of the first triode can be in a grounded state when the fourth triode does not work, so that the power consumption of the driving chip is reduced.

In the above technical solution, one load driving circuit of the I load driving circuits is used for driving the buzzer.

In the technical scheme, the load driving circuit of the buzzer for driving is arranged in the plurality of load driving circuits, so that a user is reminded of the state of the cooking appliance when the cooking appliance finishes working or breaks down.

According to a second aspect of the present invention, there is provided a cooking appliance having the driving chip provided in the first aspect of the present invention, and therefore, the cooking appliance provided in the embodiments of the present invention has all the advantages of the driving chip provided in any one of the embodiments of the first aspect, which is not enumerated herein.

Furthermore, the cooking utensil further comprises a first capacitor, the first end of the first capacitor is connected with the control end of the first triode of the driving chip, the second end of the first capacitor is grounded and is matched with the safety circuit for use, when the third triode of the safety circuit is conducted, the first power supply charges the first capacitor, the control end voltage of the first triode is stable, the working reliability of the first triode is guaranteed, and the working stability of the whole driving chip is further improved.

In the description of the present invention, it should be noted that the "cooking appliance" mentioned in the present invention may include any cooking appliance capable of cooking food, including but not limited to microwave oven, pressure cooker, and electric cooker, to which the technical solution of the present invention can be applied.

Additional aspects and advantages of the invention 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 invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows an internal schematic diagram of a driver chip according to one embodiment of the invention;

FIG. 2 shows a pin diagram of a driver chip according to an embodiment of the invention;

FIG. 3 shows a schematic diagram of a driver chip external driver circuit according to one embodiment of the invention;

fig. 4 shows a schematic block diagram of a cooking appliance according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

the circuit comprises a Q1 first triode, a Q2 second triode, a Q3 third triode, a Q4 fourth triode, a Q5 fifth triode, a D1 first freewheeling device, a D2 second freewheeling device, a D4 third freewheeling device, a D3 first diode, a VCC1 first power supply, a VCC2 second power supply, a R1 first resistor, a R2 second resistor, a R3 third resistor, a R4 fourth resistor, a R5 fifth resistor, a R6 sixth resistor, a R7 seventh resistor, a R8 eighth resistor, and a 404 first capacitor.

Detailed Description

So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A driving chip and a cooking appliance according to some embodiments of the present invention are described below with reference to fig. 1 to 4.

Example one

According to an embodiment of the present invention, as shown in fig. 1, a driving chip is provided, and as can be seen from an internal schematic diagram of the driving chip shown in fig. 1, the driving chip is integrated with: the oven door safety control device comprises a load control circuit, an oven door state detection circuit, a safety loop and a first triode Q1.

Specifically, a first end of the first triode Q1 is connected with the load control circuit, a second end of the first triode Q1 is connected with the oven door state detection circuit, and a control end of the first triode Q1 is connected with the safety circuit.

In the driving chip provided by the invention, the oven door state detection circuit is used for determining whether an oven door switch is closed, the safety circuit is used for inputting a signal to the control end of the first triode Q1 so as to control the conduction state of the first triode Q1, and the load control circuit is used for controlling the running state of a load.

The load control circuit and the oven door state detection circuit are respectively connected with the first end and the second end of the first triode Q1 so as to combine the operation of the load control circuit with the oven door state detection circuit, and meanwhile, the operation of the load control circuit is combined with the safety circuit based on the connection relation of the safety circuit and the first triode Q1 so as to improve the operation reliability of the load control circuit.

Further, an NPN transistor may be selected as the first transistor Q1, wherein a collector of the NPN transistor is used as the first terminal of the first transistor Q1, an emitter of the NPN transistor is used as the second terminal of the first transistor Q1, and a base of the NPN transistor is used as the control terminal of the first transistor Q1.

Further, the number of the first transistors Q1 may be multiple, and any two first transistors Q1 are connected in parallel, so that the load carrying capacity of the load control circuit is increased.

According to the driving chip provided by the invention, the driving circuits of the cooking appliance such as the oven door detection, the safety loop, the load control and the like are redesigned and optimized to be integrated into the driving chip, so that the occupied area of the driving circuit on the control panel of the cooking appliance is reduced, and the cost of the control panel is conveniently reduced.

Because the driving circuits are integrated, the anti-interference capability is improved compared with the state before the driving circuits are integrated, and therefore, the reliability of the cooking utensil applying the driving chip can be improved.

In addition, the driving chip provided by the above embodiment of the present invention may further have the following additional technical features:

in one possible embodiment, the load control circuit includes: each of the N first load control branches includes a second transistor Q2, a first end of the second transistor Q2 is used for being connected with a control loop of the first load, a second end of the second transistor Q2 is connected with a first end of the first transistor Q1, a control end of the second transistor Q2 is used for receiving a control signal of the first load, wherein a second end of the first transistor Q1 is connected with the oven door state detection circuit, a control end of the first transistor Q1 is connected with the safety loop, and N is a positive integer greater than or equal to 1.

In this embodiment, the load control circuit includes N first load control branches, each of which includes a second transistor Q2, wherein a first terminal of the second transistor is connected to the control loop of the first load, a second terminal of the second transistor Q2 is connected to the first terminal of the first transistor Q1, and a control terminal of the second transistor Q2 is configured to receive a control signal of the first load.

Specifically, under the condition that the control end of the second triode Q2 receives the control signal of the first load, the first end and the second end of the second triode Q2 are conducted, and due to the existence of the first triode Q1, the operation of the control loop of the first load is also controlled by the first triode Q1, that is, the control of the safety loop and the oven door state detection circuit, so that the operation safety of the control loop of the first load can be improved, and the possibility of starting the operation of the control loop of the first load under the condition that the oven door of the cooking appliance is in an open state and/or the safety loop does not output a signal is reduced.

In a possible embodiment, the control circuit of the first load comprises, for example, a relay, it being understood that the relay is used to control whether the first load is operating, in particular the relay is connected in series to the supply circuit of the first load.

In a possible embodiment, when the oven door state detection circuit detects that the oven door switch is in a closed state, and the safety circuit determines that the safety signal is received, the first triode Q1 is turned on, and at this time, if the driving chip receives the control signal of the first load, the second triode is turned on, so that the first load control branch can drive the corresponding load device to operate, and control over different load devices through the driving chip is realized.

Further, an NPN transistor may be selected as the second transistor Q2, wherein a collector of the NPN transistor serves as a first terminal of the second transistor Q2, an emitter of the NPN transistor serves as a second terminal of the second transistor Q2, and a base of the NPN transistor serves as a control terminal of the second transistor Q2.

Further, the number N of the first load control branches in the load control circuit, where N is an integer greater than 1, is used to control a plurality of load devices, and specifically, the first load control branch is used to drive a load device with an extremely high safety requirement, such as: microwave generators, heating elements, etc. of microwave ovens.

In the above embodiments, the heating assembly includes, but is not limited to, a heating pipe, and may also be a steam generating device.

In one possible embodiment, the first load control branch further includes a first freewheeling device D1, and the first freewheeling device D1 is connected to the first terminal of the second transistor Q2.

In this embodiment, a first freewheeling device D1 is further disposed in the first load control branch and connected to the first end of the second transistor Q2, and when the second transistor Q2 is turned off, the first freewheeling device D1 may release the power remaining in the circuit, thereby improving the reliability of the driving chip.

Further, a diode can be selected as the first freewheeling device D1, specifically, the anode of the diode is connected to the first end of the second transistor Q2, and the cathode of the diode is connected to the power supply, because the diode has the characteristics of forward conduction and reverse cut-off, when the second transistor Q2 is disconnected, the first freewheeling device D1 can release the residual electric energy in the circuit, so that the induced voltage cannot flow back to the second transistor Q2, thereby preventing the second transistor Q2 from being broken down, and improving the operation reliability of the second transistor Q2.

In a possible embodiment, the safety circuit comprises: a first end of a third triode Q3 is used for being connected with a first power supply VCC1, and a second end of the third triode Q3 is connected with a control end of a first triode Q1; a first resistor R1, a first end of the first resistor R1 is connected to a first end of the third transistor Q3, and a second end of the first resistor R1 is connected to a control end of the third transistor Q3; and a first end of the second resistor R2, a first end of the second resistor R2 is connected with a second end of the first resistor R1, and a second end of the second resistor R2 is used for receiving a safety signal.

In this embodiment, the safety loop includes a third transistor Q3, wherein a first terminal of the third transistor Q3 is coupled to the first power supply VCC1 and a second terminal of the third transistor Q3 is coupled to a control terminal of the first transistor Q1.

In one possible embodiment, the safety signal may be a signal generated based on the closing of the oven door, a signal generated when the oven door switch is in a closed state, or a signal generated by a cooking appliance to which the driving chip is applied.

In one implementation, the signal generated by the cooking appliance to which the driver chip is applied may be a signal generated upon passing of a self-test of the cooking appliance.

In an embodiment, in the case that the safety signal is a signal generated when the door switch is in the closed state, when the safety circuit secondarily determines that the door switch is closed, the third transistor Q3 is turned on, and since the second end of the third transistor Q3 is connected to the control end of the first transistor Q1, the voltage at the control end of the first transistor Q1 is greater than the turn-on voltage of the first transistor Q1, so that the first transistor Q1 is turned on, it is ensured that the first transistor Q1 can be turned on only when the safety circuit secondarily determines that the door switch is in the closed state, and the reliability of the operation of the driving chip is improved.

Specifically, the first power supply VCC1 is a +5V power supply.

Further, a PNP transistor may be selected as the third transistor Q3, wherein an emitter of the PNP transistor is used as the first terminal of the first transistor Q1, a collector is used as the second terminal of the third transistor Q3, and a base is used as the control terminal of the third transistor Q3.

Further, the safety circuit further includes a first resistor R1 and a second resistor R2, the first resistor R1 is connected in parallel between the first end and the control end of the third triode Q3, the first end of the second resistor R2 is connected to the second end of the first resistor R1, the second end of the second resistor R2 is used for receiving a safety signal, the first power VCC1 forms a voltage drop across the first resistor R1 and the third resistor R3, and by reasonably setting values of the first resistor R1 and the second resistor R2, the conduction of the first triode Q1 can be controlled under the condition that the safety signal is low voltage or no input, the input does not need to be maintained all the time, so that the power consumption of the driver chip is reduced.

In a possible embodiment, the values of the first resistor R1 and the third resistor R3 are determined according to the type of the third transistor Q3 and/or the supply voltage of the first voltage, and specific values thereof are not limited herein.

In one possible embodiment, the load control circuit further comprises: each of the M second load control branches includes O fourth transistors Q4, a first end of the fourth transistor Q4 is configured to be connected to a control loop of the second load, a second end of the fourth transistor Q4 is grounded, and a control end of the fourth transistor Q4 is connected to a second end of the third transistor Q3, where M, O is a positive integer greater than or equal to 1.

In this embodiment, the load control circuit includes M second load control branches, each of which includes O fourth transistors Q4, wherein a first terminal of the fourth transistor is connected to the control loop of the second load, a control terminal of the fourth transistor Q4 is connected to a second terminal of the third transistor Q3,

in this embodiment, the second load control branch is different from the first load control branch, and the control of the second load control branch is not controlled by the first transistor Q1, that is, the voltage output from the second terminal of the third transistor Q3 meets the turn-on voltage of the fourth transistor Q4, so that the second load control branch can be used to drive the load with higher safety factor.

In the embodiment of the application, the second load control branch circuit is integrated in the driving chip, and the driving circuit is not required to be integrated on the control panel applying the driving chip again, so that the area of the control panel can be reduced, meanwhile, the anti-interference capability of the driving circuit is also improved, and the reliability of the cooking appliance applying the driving chip is improved.

In an implementation example, when the third transistor Q3 in the safety loop is turned on, the fourth transistor Q4 can be turned on, and the second load control branch can drive the corresponding load device to operate.

Further, an NPN transistor may be selected as the fourth transistor Q4, wherein a collector of the NPN transistor is used as the first terminal of the fourth transistor Q4, an emitter of the NPN transistor is used as the second terminal of the fourth transistor Q4, and a base of the NPN transistor is used as the control terminal of the fourth transistor Q4.

Further, the number of the second load control branches in the load control circuit is M, where M is an integer greater than 1, and is used to control a plurality of load devices, specifically, the second load control branch is used to drive a load device with a higher safety requirement, specifically, the second load control branch may be used to drive, for example: motors of microwave ovens, etc.

In a possible embodiment, each of the second load control branches further comprises: the third resistors R3, the third resistors R3 and the fourth transistor Q4 are in one-to-one correspondence, the first end of the third resistor R3 is connected with the control end of the fourth transistor Q4, and the second end of the third resistor R3 is grounded.

In the above embodiments, O is a positive integer greater than or equal to 1.

In this embodiment, the control terminal of any one of the fourth transistors is connected to the third resistor R3 with one end grounded, and by setting the third resistor R3 so that the control terminal is in a grounded state when the fourth transistor Q4 is not in use, the fourth transistor Q4 is turned on only when the voltage at the second terminal of the third transistor Q3 exceeds the turn-on voltage of the fourth transistor Q4, that is, is turned on only at a high level, thereby reducing the power consumption of the driver chip.

In a possible embodiment, each of the second load control branches further comprises: the fourth resistor R4 and the fourth resistor R4 are serially connected between the control terminal of the fourth transistor Q4 and the second terminal of the fourth transistor Q4.

In this embodiment, the fourth resistor R4 is connected in series between the control terminal and the second terminal of the fourth transistor Q4, so as to eliminate leakage current, thereby improving the reliability of the operation of the second load control branch.

In a possible embodiment, each of the second load control branches further comprises: and the second freewheeling device is connected with the first end of the fourth triode Q4.

In this embodiment, a second freewheeling device D2 is further disposed in the second load control branch and connected to the first end of the fourth transistor Q4, and when the second transistor Q2 is turned off, the second freewheeling device D2 may release the power remaining in the circuit, thereby improving the reliability of the driving chip.

Further, a diode may be selected as the second freewheeling device D2, specifically, the anode of the diode is connected to the first end of the fourth transistor Q4, and the cathode of the diode is connected to the power supply, because the diode has the characteristics of forward conduction and reverse cut-off, when the fourth transistor Q4 is turned off, the second freewheeling device D2 may release the residual power in the circuit, so that the induced voltage does not flow back to the fourth transistor Q4, thereby preventing the fourth transistor Q4 from being broken down, and improving the operation reliability of the fourth transistor Q4.

In a possible embodiment, the oven door status detection circuit comprises: a second power supply VCC 2; a fifth resistor R5, a first end of the fifth resistor R5 being connected to the second power source VCC 2; an anode of the first diode D3, an anode of the first diode D3 and a second end of the fifth resistor R5 are connected, a cathode of the first diode D3 and a second end of the first triode Q1 are connected, and a second end of the fifth resistor R5 is used for outputting the open and close state of the furnace door switch.

In this embodiment, the oven door state detection circuit includes the second power VCC2, and particularly, the second power VCC2 is a +5V power.

Furthermore, the oven door state detection circuit also comprises a fifth resistor R5, wherein a first end of the fifth resistor R5 is connected with a second power supply VCC2, and a second end is used for outputting the opening and closing state of the oven door switch.

Specifically, by detecting the potential of the second end of the fifth resistor R5, the open/close state of the door switch can be determined.

Further, the oven door state detection circuit further comprises a first diode D3, an anode of the first diode D3 is connected with the second end of the fifth resistor R5, and a cathode of the first diode D3 is connected with the second end of the first triode Q1.

Specifically, first diode D3 and first triode Q1's second end is the reverse series connection, because of first diode D3 has the forward and switches on, reverse characteristic of ending, the signal of having avoided first triode Q1 second end is to the interference of fifth resistance R5 second end detected signal, the accuracy of the signal through detecting fifth resistance R5 second end has been guaranteed, guarantee the potential signal through the fifth resistance R5 second end that detects out, can accurately judge whether the furnace gate switch closes, the reliability of drive chip operation has further been improved.

In a possible embodiment, the driving chip further includes: i load driving circuits, each load driving circuit comprising: the P fifth transistors Q5, a first end of the fifth transistor Q5 is configured to be connected to the third load, a second end of the fifth transistor Q5 is grounded, and a control end of the fifth transistor Q5 is configured to receive a control signal of the third load, where I, P is a positive integer greater than or equal to 1.

In this embodiment, the load driving circuit includes P fifth transistors Q5, a first terminal of the fifth transistor Q5 is connected to the third load, a second terminal of the fifth transistor Q5 is grounded, and a control terminal of the fifth transistor Q5 is configured to receive a control signal of the third load.

Specifically, when the control terminal of the fifth triode Q5 receives a control signal of the third load, the fifth triode Q5 is turned on, and the load driving circuit can drive the corresponding load device to operate, so that different load devices can be controlled by the driving chip, and devices used by the peripheral driving circuit are reduced.

Further, an NPN transistor may be selected as the fifth transistor Q5, wherein a collector of the NPN transistor is used as the first terminal of the fifth transistor Q5, an emitter of the NPN transistor is used as the second terminal of the fifth transistor Q5, and a base of the NPN transistor is used as the control terminal of the fifth transistor Q5.

Further, the number of the load driving circuits in the driving chip is I, where I is an integer greater than 1, and is used to control a plurality of load devices, specifically, the load driving circuit is used to drive a load device with a low safety requirement, and specifically, the load driving circuit may be used to drive, for example: a display screen of the microwave oven, a buzzer and other load devices.

In the above embodiment, the load driving circuit is further provided with a third freewheeling device D4 connected to the first terminal of the fifth transistor Q5, and when the fifth transistor Q5 is turned off, the third freewheeling device D4 can discharge the power remaining in the circuit, thereby improving the reliability of the driving chip.

Further, a diode may be selected as the third freewheeling device D4, and specifically, an anode of the diode is connected to the first end of the fifth transistor Q5, and a cathode of the diode is connected to the power supply, and since the diode has a forward conduction characteristic and a reverse blocking characteristic, when the fifth transistor Q5 is turned off, the third freewheeling device D4 may release residual power in the circuit, so that the induced voltage does not flow back to the fifth transistor Q5, thereby preventing the fifth transistor Q5 from being broken down, and improving the operation reliability of the fifth transistor Q5.

In one possible embodiment, each of the load driving circuits further includes: the P sixth resistors R6, the sixth resistor R6 and the fifth triode Q5 are in one-to-one correspondence, the first end of the sixth resistor R6 is connected with the control end of the fifth triode Q5, and the second end of the sixth resistor R6 is grounded.

In this embodiment, a sixth resistor R6 with one end grounded is connected to the control end of any one of the fifth transistors Q5, and the sixth resistor R6 is arranged so that the control end is grounded, i.e., turned on only at a high level, when the fifth transistor Q5 is not in use, thereby reducing the power consumption of the driver chip.

In the above embodiment, any of the load driving circuits further includes: the seventh resistor R7 and the seventh resistor R7 are serially connected between the control terminal of the fifth transistor Q5 and the second terminal of the fifth transistor Q5.

In this embodiment, the seventh resistor R7 is connected in series between the control terminal and the second terminal of the fifth transistor Q5, so as to eliminate the leakage current, thereby improving the reliability of the operation of the load driving circuit.

In a possible embodiment, the driving chip further includes: the eighth resistor R8, a first end of the eighth resistor R8 is connected to the control terminal of the first transistor Q1, and a second end of the eighth resistor R8 is grounded.

In this embodiment, the control terminal of the first transistor is connected to an eighth resistor R8 with one end grounded, so that when the fourth transistor Q4 is not in operation, the control terminal is grounded, thereby reducing the power consumption of the driver chip.

In one possible embodiment, one of the I load driving circuits is used to drive a buzzer.

In this embodiment, a load driving circuit for driving a buzzer is provided among the plurality of load driving circuits, so that a user is alerted to the state of the cooking appliance when the cooking appliance is finished operating or has a malfunction.

Example two

According to an embodiment of the present invention, there is provided a driving chip, as shown in fig. 2, and a pin diagram of the driving chip is shown in fig. 2, as can be seen from fig. 1:

and a pin 1 of the driving chip is connected with a loop of the oven door switch when the oven door switch is closed.

Pin 2 of the driving chip is an input port of a furnace door detection signal, and when the furnace door is opened and closed, pin 2 receives the furnace door detection signal.

The pin 3 of the driving chip is used for inputting a signal to the control end of the first triode Q1, that is, after the safety circuit receives a safety determination signal, the third diode is conducted, so that the voltage of the control end of the first triode Q1 is greater than the conduction voltage, the first triode Q1 is conducted, so that the load control circuit in the driving chip can control the corresponding load to operate, and the operation of the load control circuit is linked with the safety circuit through the pin 3 through the integrated driving chip, so that the operation reliability of the load control circuit is improved.

Pins 4, 5 of the driver chip are used to input control signals to the first load branch.

Pins 6, 7 of the driver chip are used to input control signals to the load driving circuit.

And the pin 8 of the driving chip is grounded, so that the safety performance of the driving chip is ensured.

The pin 9 of the driver chip is connected to a power supply VDD, specifically, in the present embodiment, VDD is +12V power.

The pins 10, 11 of the driver chip are connected to the control circuit of the third load.

Pin 12 of the driver chip is connected to the control circuit of the second load.

The pins 13, 14 of the driver chip are connected to the control circuit of the first load.

Pin 15 of the driver chip is connected to a first power supply, specifically, in the present embodiment, VCC1 is a +5V power supply.

Pin 16 of the driver chip is used to input a control signal to the second load branch.

The driving chip provided by the embodiment redesigns and optimizes driving circuits such as furnace door detection, safety circuit and load control of a cooking appliance, integrates the driving chip into a whole, reduces the occupied area of the driving circuit on a control panel of the cooking appliance, is convenient for reducing the cost of the control panel, and improves the anti-interference capacity of the driving chip compared with the state before integration because the driving circuits are integrated, thereby further ensuring the reliability of the cooking appliance applying the driving chip.

EXAMPLE III

As shown in fig. 4, a cooking appliance 400 is provided as an embodiment of the present invention, and has a driving chip 402 provided in one or two embodiments of the present invention, so that the cooking appliance 400 provided in the third embodiment of the present invention has all the advantages of the driving chip provided in the one or two embodiments of the present invention.

The oven door state detection circuit in the driving chip provided by the invention is used for determining whether an oven door switch is closed, the safety loop is used for inputting a signal to the control end of the first triode Q1 so as to control the conducting state of the first triode Q1, and the load control circuit is used for controlling the running state of a load.

The load control circuit and the oven door state detection circuit are respectively connected with the first end and the second end of the first triode Q1 so as to combine the operation of the load control circuit with the oven door state detection circuit, and meanwhile, the operation of the load control circuit is combined with the safety circuit based on the connection relation of the safety circuit and the first triode Q1 so as to improve the operation reliability of the load control circuit.

Further, an NPN transistor may be selected as the first transistor Q1, wherein a collector of the NPN transistor is used as the first terminal of the first transistor Q1, an emitter of the NPN transistor is used as the second terminal of the first transistor Q1, and a base of the NPN transistor is used as the control terminal of the first transistor Q1.

Further, the number of the first transistors Q1 may be multiple, and any two first transistors Q1 are connected in parallel, so that the load carrying capacity of the load control circuit is increased.

According to the driving chip provided by the invention, the driving circuits of the cooking appliance such as the oven door detection, the safety loop, the load control and the like are redesigned and optimized to be integrated into the driving chip, so that the occupied area of the driving circuit on the control panel of the cooking appliance is reduced, and the cost of the control panel is conveniently reduced.

Because the driving circuits are integrated, the anti-interference capability is improved compared with the state before the driving circuits are integrated, and therefore, the reliability of the cooking utensil applying the driving chip can be improved.

Further, cooking utensil 400 still includes first electric capacity 404, the first end of first electric capacity 404 is connected with the control end of the first triode Q1 of driver chip, the second end ground connection of first electric capacity 404, use with the safety circuit cooperation, when the third triode Q3 of safety circuit switches on, first power VCC1 charges for first electric capacity 404, make the stability of first triode Q1 control end voltage, guaranteed the reliability of first triode Q1 work, the stability of the work of whole driver chip has further been improved.

In the description of the present invention, it should be noted that the "cooking appliance" mentioned in the present invention may include any cooking appliance capable of cooking food, including but not limited to microwave oven, pressure cooker, and electric cooker, to which the technical solution of the present invention can be applied.

The cooking utensil that this embodiment provided, including driver chip, driver chip detects drive circuit such as this cooking utensil's furnace gate, safety circuit, load control, redesign optimization, integrated driver chip as an organic whole, reduced drive circuit at cooking utensil's control panel's area occupied, reduce the cost of manufacture of control panel, simultaneously because driver circuit is integrated together, for not integrating the preceding state, its anti-interference ability improves to some extent, has further guaranteed the reliability of the cooking utensil of using driver chip.

Example four

The operation principle of the driving chip 402 according to the present invention will be described with reference to fig. 1, 2 and 3, with the cooking device 400 as a microwave oven:

specifically, as shown in fig. 1, RLY1_ MICRO port is connected to a control circuit of a microwave oven microwave generator, RLY2_ GRILL port is connected to a control circuit of a microwave oven heating assembly, RLY3_ MOTOR is connected to a control circuit of a microwave oven MOTOR, BUZZER port is connected to a control circuit of a BUZZER of a microwave oven, C1 port is connected to a control circuit of a display assembly of a microwave oven, the MICRO port is an input port of a microwave generator control signal, the GRILL port is an input port of a heating assembly control signal, Cap2 port is an input port of a MOTOR control signal, Cap1 port is an input port of a safety determination signal (for secondarily determining whether an oven DOOR switch is closed in this embodiment), B1 port is an input port of a display assembly control signal, BUZ port is an input port of a BUZZER control signal, DOOR _ VH2 is connected to a circuit of an oven DOOR switch of a microwave oven, and DOOR port is an oven DOOR detection signal input port.

In one possible embodiment, the B1 port becomes a MOTOR port for controlling MOTOR operation.

In a possible embodiment, when the door is closed and the safety loop is determined twice, the first transistor Q1 is turned on, and when the MICRO port and the GRILL port input control signals, the second transistor Q2 is turned on to control the microwave generator and the heating assembly to operate, so as to achieve the function of heating the food.

In this embodiment, since the microwave generator and the heating device are easily damaged when the operation is not standardized during the use process, the driving chip provided by this embodiment determines that the oven door switch is closed through the oven door detection circuit, and then the safety circuit performs secondary determination to ensure that the oven door is in a closed state, so that the microwave generator and the heating device can be controlled to operate, and the safety of the user during the use of the microwave oven is ensured.

In one possible embodiment, the oven door is closed, the safety circuit determines that the oven door switch is in a closed state, and when the control signal is input from the Cap2 port, the fourth transistor Q4 is turned on to control the microwave oven motor to work.

In the embodiment, because the safety requirement of the motor of the microwave oven relative to the microwave generator and the heating device is lower, the driving chip provided by the embodiment can control the microwave generator and the heating device to work after the oven door is determined to be closed through the safety circuit, secondary determination is not needed, the safety of a user in the process of using the microwave oven is ensured, and meanwhile, the operation efficiency of the driving chip is improved.

In a possible embodiment, when the control signals are input from the B1 port and the BUZ port, the fifth transistor Q5 is turned on, and controls the display component and the buzzer to work.

In the embodiment, the display component and the buzzer are not easy to hurt users in the working process, so that whether the furnace door is closed or not is not determined through the furnace door detection circuit and the safety circuit, the display component and the buzzer can be controlled to work when a control signal is input, and the operation efficiency of the driving chip is improved.

In a possible embodiment, the safety circuit further comprises a second capacitor, wherein a first end of the second capacitor is connected with the Cap1 port, a second end of the second capacitor is used for receiving the safety signal, and the second capacitor is arranged so as to limit the form of the safety signal, that is, the safety signal is input in the form of a variable frequency signal, thereby increasing the threshold of the safety circuit operation, preventing the safety circuit from being triggered by mistake due to the input of a direct current signal, and increasing the safety of the operation of the cooking device.

The driving chip provided by the embodiment is used for the microwave oven, redesigns and optimizes driving circuits such as oven door detection, safety circuit and load control, integrates the driving chip, reduces the occupied area of the driving circuit on the control panel of the microwave oven, and is convenient for reducing the cost of the control panel. Meanwhile, as the driving circuits are integrated together, compared with the state before the integration, the anti-interference capability of the driving circuits is improved, and the reliability of the microwave oven applying the driving chip provided by the embodiment is improved.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In the present invention, the schematic representations of the terms used above 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.