CN213849978U

CN213849978U - Food processing machine

Info

Publication number: CN213849978U
Application number: CN202022141759.5U
Authority: CN
Inventors: 王旭宁; 杜春年
Original assignee: Joyoung Co Ltd
Current assignee: Shandong Jiuchuang Home Appliance Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-08-03
Anticipated expiration: 2030-09-27

Abstract

The embodiment of the utility model discloses food preparation machine, include: a power supply assembly, a control unit and a load circuit; the power supply assembly comprises a first power supply and a second power supply, and the load circuit is connected with the first power supply and the second power supply so that the first power supply and the second power supply can simultaneously supply power to the load circuit; the control unit is connected with the first power supply so that the first power supply supplies power to the control unit, or the control unit is connected with the second power supply so that the second power supply supplies power to the control unit. The embodiment of the utility model discloses food processor, reduce cost, and realize the low-power consumption.

Description

Food processing machine

Technical Field

The utility model relates to a but not only be limited to the kitchen appliances field, more specifically relates to a food preparation machine.

Background

With the change of user's demand, portable products gradually develop and grow, a large amount of built-in rechargeable power supply type food processor products have appeared in the small household appliance industry at present, the existing rechargeable power supply of the food processor products mainly comprises single-section lithium batteries and double-section lithium batteries, and the like, and can provide power with various voltages.

For a battery power supply circuit with two or more batteries, the batteries are usually connected in series to directly supply power or the system operating voltage is controlled to be 5V by a voltage stabilizing circuit, for example, the battery voltage of the battery is 5.5V-8.4V, and the battery voltage is reduced to 5V by a Low Dropout Regulator (LDO) to supply power to the system. However, the total voltage of the battery is reduced by the voltage stabilizing circuit, although the system voltage stability is high, the voltage stabilizing circuit needs to be added, and meanwhile, as the standby low power consumption is realized, the low power consumption control circuit needs to be added, so that the overall cost is high.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a food processor, include: a power supply assembly, a control unit and a load circuit;

the power supply assembly comprises a first power supply and a second power supply, and the load circuit is connected with the first power supply and the second power supply, so that the first power supply and the second power supply simultaneously supply power to the load circuit;

the control unit is connected with the first power supply so that the first power supply supplies power to the control unit, or the control unit is connected with the second power supply so that the second power supply supplies power to the control unit.

In one example, the first power source and the second power source are connected in series;

the load circuit is connected in a series loop of the first power supply and the second power supply, so that the first power supply and the second power supply are connected in series and then supply power to the load circuit;

the control unit is connected in a loop of the first power supply so that the first power supply supplies power to the control unit, or the control unit is connected in a loop of the second power supply so that the second power supply supplies power to the control unit.

In one example, the first power source and the second power source are each a single battery.

In one example, the food processor further comprises: the charging circuit is used for alternately charging the first power supply and the second power supply, the charging circuit is connected with the first power supply and the second power supply, and the alternate charging means that one of the first power supply and the second power supply charges the other power supply when the other power supply reaches a set voltage.

In one example, the set voltage is 4.2 ± 0.05V.

In one example, the charging circuit includes a charging chip and two sets of charging switch circuits: a first charge switch circuit and a second charge switch circuit;

the first charging switch circuit is connected between the charging chip and the first power supply, and the first charging switch circuit is conducted so as to charge the first power supply through the charging chip;

the second charging switch circuit is connected between the charging chip and the second power supply, and the second charging switch circuit is switched on to charge the second power supply through the charging chip.

In one example, an input end of the first charging switch circuit is connected with a first battery BAT port of the charging chip, and an output end of the first charging switch circuit is connected with a first end of the first power supply;

the second end of the first power supply is connected with the first end of the second power supply in series, and the serial common end is connected with the port of a second battery BAT2 of the charging chip;

the second end of the second power supply is connected with the input end of the second charging switch circuit, and the output end of the second charging switch circuit is connected with the grounding GND port of the charging chip.

In one example, each set of charging switch circuits includes two MOS transistors: the MOS transistor comprises a first MOS transistor and a second MOS transistor;

the first MOS tube and the second MOS tube are both P-type MOS tubes, the drain electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, the source electrode of the first MOS tube is the input end of the charging switch circuit, and the source electrode of the second MOS tube is the output end of the charging switch circuit;

or,

the first MOS tube and the second MOS tube are both N-type MOS tubes, the source electrode of the first MOS tube is connected with the source electrode of the second MOS tube, the drain electrode of the first MOS tube is the input end of the charging switch circuit, and the drain electrode of the second MOS tube is the output end of the charging switch circuit.

In one example, each set of charge switch circuits includes two transistors: a first triode and a second triode;

the first triode and the second triode are both P-type triodes, the collector of the first triode is connected with the collector of the second triode, the emitter of the first triode is the input end of the charging switch circuit, and the emitter of the second triode is the output end of the charging switch circuit;

or,

the first triode and the second triode are both N-type triodes, an emitting electrode of the first triode is connected with an emitting electrode of the second triode, a collecting electrode of the first triode is an input end of the charging switch circuit, and a collecting electrode of the second triode is an output end of the charging switch circuit.

In an example, the charging chip is further provided with a network port, and the network port is connected with the control unit so that the control unit obtains the charging states of the first power supply and the second power supply through the charging chip.

The utility model discloses at least one embodiment provides a food processor compares with prior art, has following beneficial effect: two power supplies can be arranged, the power is supplied independently or the power is supplied by combining the two power supplies, so that different voltages can be provided for the control unit and the load circuit, the voltage output by the voltage stabilizing circuit conversion power supply component does not need to be arranged, and the cost can be reduced. And when the load circuit does not work, only one of the first power supply and the second power supply is needed to supply power, so that the electric quantity can be saved, and low power consumption is realized.

The utility model discloses in some implementation modes of embodiment, can also reach following effect:

1. the power supply module can be a battery with two series-connected batteries, the control unit supplies power to work through a single battery VCC, the load circuit works through two batteries B + with two series-connected batteries, different circuits can be powered through different batteries, and the circuits powered by the two batteries have the advantages of less key detection, low power consumption control, voltage stabilizing module and other circuits, and the cost can be reduced.

2. The charging circuit can realize the alternate charging of the first power supply and the second power supply through the charging chip and the charging switch circuit so as to charge the first power supply and the second power supply which are connected in series in a balanced manner (such as two batteries connected in series).

3. The set voltage and the balance of the electric quantity of the two batteries can be achieved no matter how much the voltage difference between the two batteries is through the charging mode of alternately charging the single batteries.

4. The charging chip and the control unit can be connected through a network port in a network manner, so that the charging state indication is realized.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention.

FIG. 1 is a schematic diagram of a power supply circuit of a current food processor;

FIG. 2 is a schematic diagram of a rechargeable food processor according to an exemplary embodiment of the present invention;

FIG. 3 is a schematic diagram of a rechargeable food processor according to an exemplary embodiment of the present invention;

fig. 4 is a block diagram of a food processor according to an exemplary embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a food processor according to an embodiment of the present invention;

fig. 6 is a block diagram of a food processor according to an exemplary embodiment of the present invention;

fig. 7 is a block diagram of a charging circuit according to an embodiment of the present invention;

fig. 8 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention;

fig. 9 is a schematic view illustrating a flow direction of a charging current in a charging circuit according to an embodiment of the present invention;

fig. 10 is a schematic circuit diagram of a main control chip according to an embodiment of the present invention;

fig. 11 is a schematic diagram of an electric quantity display circuit provided in an embodiment of the present invention;

fig. 12 is a schematic circuit diagram of a uncapping key circuit according to an embodiment of the present invention;

fig. 13 is a schematic circuit diagram of a key display panel according to an embodiment of the present invention;

fig. 14 is a schematic circuit diagram of a load control circuit according to an embodiment of the present invention.

Description of reference numerals:

firstly, a juicing component; ② a host; ③ a slag receiving cup; fourthly, the juice receiving cup; fifthly, a motor; sixthly, an output shaft of the motor; seventhly, a circuit board; eighthly, a feeding channel; 10-a charge management circuit; 41-power supply components; 411 — first power supply; 412-a second power supply; 42-a control unit; 43-load circuit; 431-a load control circuit; 432-a motor; 44-a charging circuit; 441-a first charge switch circuit; 442-second charge switch circuit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a schematic diagram of a power supply circuit of a current food processor, as shown in fig. 1, in practical application, the power supply circuit needs to include a key detection circuit, a power control circuit and a voltage regulator circuit to provide a power supply voltage. The voltage stabilizing circuit mainly stabilizes the battery voltage to the system working voltage (typically 5V), the key detection circuit and the power control circuit mainly realize low power consumption control, the key detection circuit identifies whether the key is input or not, the power control circuit mainly performs on-off control on the system power supply, and when the key is not pressed, the input end of the voltage stabilizing circuit is disconnected due to the existence of the power control circuit, so that the low power consumption of the system is realized. When the key is pressed, a Metal oxide Semiconductor field effect transistor (MOS transistor for short) Q1 in the power control circuit is turned on briefly, the voltage stabilizing circuit supplies power to the system, and the main control chip can turn on the Q1 through a diode D3 in the power control circuit by outputting a control signal, thereby realizing power supply. The key detection circuit, the power control circuit and the voltage stabilizing circuit shown in fig. 1 are all the prior art, the specific circuit structure and the implementation principle thereof are the same as those of the prior art, and the embodiment is not limited and described herein.

However, the power supply circuit shown in fig. 1 needs to additionally provide a key detection circuit, a power control circuit and a voltage stabilizing circuit when supplying power, and the overall cost is high.

The embodiment of the utility model provides an applicable portable food processor that is rechargeable, figure 2 is the utility model discloses a chargeable food processor's that example embodiment provided structure schematic diagram, figure 3 is the chargeable food processor's that example embodiment provided structure schematic diagram, as shown in figure 2 and figure 3, chargeable food processor can include: the juice extractor comprises a juice extracting component, a main machine, a slag receiving cup, a juice receiving cup, a motor, a circuit board and a feeding channel. The juicing component comprises a squeezing barrel and a screw rod, an output shaft of a motor extends into the squeezing barrel, the screw rod is positioned in the squeezing barrel and connected to the output shaft of the motor, and the motor can drive the screw rod to rotate after being started.

The embodiment can be applied to food processing machines such as juice makers, meat grinders, noodle makers, egg beaters, cooking sticks, yogurt makers, egg cookers, flour mills and the like.

Fig. 4 is a block diagram of a food processor according to an exemplary embodiment of the present invention, and as shown in fig. 4, the food processor may include: a power supply assembly 41, a control unit 42 and a load circuit 43. Wherein, the power supply assembly can be arranged on the host computer, and the control unit can be arranged on the control panel.

The power supply assembly may include a first power supply 411 and a second power supply 412, with the load circuit 43 being connected to the first power supply 411 and the second power supply 412 such that the first power supply 411 and the second power supply 412 simultaneously power the load circuit. The control unit 42 is connected to the first power supply 411 so that the first power supply 411 supplies power to the control unit 42.

In an alternative embodiment, the control unit 42 is connected to the second power source 412 such that the second power source 412 supplies power to the control unit 42.

In this embodiment, two power supplies may be provided, and the two power supplies are used for supplying power separately or in combination to provide different voltages for different circuits (such as the control unit and the load circuit), that is, different circuits may be supplied with power through different power supplies, so that the voltage output by the power supply assembly may directly satisfy the voltage required by each circuit (such as the control unit and the load circuit), and there is no need to provide a voltage stabilizing circuit for converting the voltage output by the power supply assembly, which may reduce the cost.

In this embodiment, the first power supply or the second power supply independently supplies power to the control unit, so that the voltage output by the first power supply or the second power supply independently satisfies the voltage (for example, 3.7V) required by the control unit. The first power supply and the second power supply are combined to supply power to the load circuit, so that the voltage output by the first power supply and the second power supply meets the voltage (such as 7.4V) required by the load circuit. In this embodiment, when the load circuit does not operate, only one of the first power supply and the second power supply is needed to supply power, so that power consumption can be reduced, low power consumption can be realized, and low power consumption can be realized without an auxiliary circuit (such as a key detection circuit and a power control circuit shown in fig. 1), which can reduce cost.

The voltages provided by the first power supply and the second power supply can be the same or different, the voltages provided by the first power supply and the second power supply can be determined according to the actual required voltage of the circuit, and only the voltages output by the first power supply and the second power supply singly or in combination meet the actual required voltage of the circuit.

The embodiment of the utility model provides a food processor can set up two powers, supplies power or two power combination supplies power alone through two powers to provide different voltages to the control unit and load circuit, need not to set up the voltage of voltage stabilizing circuit switching power supply subassembly output, reduce cost. And when the load circuit does not work, only one of the first power supply and the second power supply is needed to supply power, so that the electric quantity can be saved, and low power consumption is realized.

In an exemplary embodiment of the present invention, fig. 5 is a schematic circuit diagram of a food processor according to an embodiment of the present invention, and as shown in fig. 5, a first power source and a second power source are connected in series; the load circuit is connected in a series loop of the first power supply and the second power supply, so that the first power supply and the second power supply are connected in series and then supply power to the load circuit; the control unit may be connected in the loop of the second power supply such that the second power supply supplies power to the control unit.

In this embodiment, two power supplies are connected in series, and the control unit can be connected in the loop of one of the power supplies, as shown in fig. 5, the system voltage is VCC from a single battery, the VCC voltage range is 2.7V-4.2V, and the system power supply can be realized without voltage reduction by the voltage stabilizing circuit. The control unit may be connected in a loop of the second power supply Bat2, and the control unit may be powered on to operate by a voltage VCC supplied by the second power supply Bat 2. The load circuit is connected in a series loop of the first power supply and the second power supply, and the load circuit can be powered on to work by the voltage B + provided by the two power supplies connected in series.

In an alternative embodiment, the control unit may be connected in the loop of the first power supply such that the first power supply supplies power to the control unit.

In this embodiment, the control unit may be connected to a loop of the first power source Bat, and the control unit may be powered on by a voltage provided by the first power source Bat.

In one example, as shown in fig. 5, the first power source and the second power source are both single batteries, i.e., the power supply assembly may be a dual series of batteries. In this embodiment, the first power source and the second power source are both single batteries, so that the voltage output by the first power source or the second power source alone can satisfy the voltage (e.g. 3.7V) required by the control unit, and the voltage output by the first power source and the second power source in combination can satisfy the voltage (e.g. 7.4V) required by the load circuit.

The specific battery number of the first power supply and the second power supply can be determined according to the actual required voltage, and only the voltage output by the first power supply and the second power supply singly or in combination meets the actual required voltage. If the actual required voltage is larger, the first power supply and the second power supply can be set to be double batteries or three batteries.

The embodiment of the utility model provides a food processor, power supply module can be for the battery of two sections series connection, and the control unit passes through single section battery VCC power supply work, and load circuit can realize different circuits through different battery powered through the two section battery B + work of establishing ties, and the circuit of two section battery powered has lacked circuits such as button detection, low-power consumption control and voltage stabilizing module, reduce cost.

In an exemplary embodiment of the present invention, fig. 6 is a block diagram of a food processor according to an exemplary embodiment of the present invention, as shown in fig. 6, the food processor may further include: and a charging circuit 44 for alternately charging the first power supply and the second power supply, wherein the charging circuit is connected with the first power supply and the second power supply, and the alternate charging means that when one of the first power supply and the second power supply reaches a set voltage, the other power supply is charged.

In this embodiment, the first power source and the second power source are rechargeable power sources, for example, the first power source and the second power source may be rechargeable batteries. The charging circuit is arranged to charge the battery assembly. Different from the conventional charging mode for charging the whole power supply, the charging circuit in the embodiment only charges one of the first power supply and the second power supply at a time, so that the two power supplies are alternately charged and cannot be charged simultaneously, the first power supply and the second power supply are charged in a balanced manner, the two power supplies can be fully charged, and even if one power supply in the two power supplies feeds power, the other power supply is fully charged, the charging circuit can also ensure that the two power supplies are fully charged in a balanced manner.

Taking the first power supply and the second power supply as single batteries as an example, the charging circuit alternately or alternately charges the two batteries respectively, the two batteries can be charged to set voltages respectively, if it is detected that the single battery (such as the first power supply) is fully charged, the charging current is 0 when the battery (such as the first power supply) is charged, the other battery (such as the second power supply) continues to be charged, and the charging is finished when the two batteries are charged to the set voltages. The set voltage and the balance of the electric quantity of the two batteries can be achieved no matter how much the voltage difference between the two batteries is through the charging mode of alternately charging the single batteries.

In one example, the set voltage may range from 4.2 ± 0.05V. According to practical requirements, the voltages of the first power supply and the second power supply reach 4.2 ± 0.05V, that is, the power supply is in a full power state, so as to ensure that the power supplied by a single power supply can meet the voltage (such as 3.7V) required by the control unit, and the voltages output by the two power supplies simultaneously supply power can meet the voltage (such as 7.4V) required by the load circuit.

In an example, fig. 7 is a block diagram of a charging circuit provided in an embodiment of the present invention, and as shown in fig. 7, the charging circuit 44 may include a charging chip U1 and two sets of charging switch circuits: a first charging switch circuit 441 and a second charging switch circuit 442; the first charging switch circuit is connected between the charging chip and the first power supply, and the first charging switch circuit is conducted so as to charge the first power supply through the charging chip; the second charging switch circuit is connected between the charging chip and the second power supply, and the second charging switch circuit is conducted to charge the second power supply through the charging chip.

In this embodiment, the charging circuit may alternately charge the first power supply and the second power supply through the charging chip and the charging switch circuit. The charging chip can control the on or off of the first charging switch circuit or the second charging switch circuit through output control so as to charge the first power supply and the second power supply (such as two batteries connected in series) in a balanced manner.

In one example, as shown in fig. 7, an input terminal of the first charge switch circuit is connected to the first battery BAT port of the charge chip, and an output terminal of the first charge switch circuit is connected to the first terminal of the first power supply; the second end of the first power supply is connected with the first end of the second power supply in series, and the serial common end is connected with the port of a second battery BAT2 of the charging chip; the second end of the second power supply is connected with the input end of the second charging switch circuit, and the output end of the second charging switch circuit is connected with the grounding GND port of the charging chip.

In this embodiment, the first charge switch circuit may be connected between the first battery BAT port of the charge chip and the loop of the first power supply, and the first battery BAT port of the charge chip controls the first charge switch circuit to be turned on or off, so that the charge chip charges the first power supply through the first battery BAT port. The second charging switch circuit may be connected between a port of the second battery BAT2 of the charging chip and a loop of the second power supply, and the second battery BAT2 of the charging chip controls the second charging switch circuit to be turned on or off, so that the charging chip charges the second power supply through the port of the second battery BAT 2.

The current loop of the charging chip for charging the first power supply can be as follows: at this time, the first charging switch circuit is turned on, the second charging switch circuit is turned off, the current charges the first power supply BAT from the inside of the charging chip through the BAT port, and then the current flows out from the first power supply BAT to the BAT2 port and then flows to the GND port.

The current loop of the charging chip for charging the second power supply can be as follows: at this time, the second charging switch circuit is turned on, the first charging switch circuit is turned off, the current charges the second power supply BAT2 from the inside of the charging chip through the BAT2 port, and then the current flows out from the second power supply BAT2 to the GND port.

In an example, fig. 8 is a schematic circuit diagram of a charging circuit provided by an embodiment of the present invention, and as shown in fig. 8, each group of charging switch circuits may include two Metal oxide Semiconductor field effect transistors (MOS transistors): the MOS transistor comprises a first MOS transistor and a second MOS transistor;

the first MOS tube and the second MOS tube are both P-type MOS tubes, the drain electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, the source electrode of the first MOS tube is the input end of the charging switch circuit, and the source electrode of the second MOS tube is the output end of the charging switch circuit.

In an alternative embodiment, the first MOS transistor and the second MOS transistor may both be N-type MOS transistors, a source of the first MOS transistor is connected to a source of the second MOS transistor, a drain of the first MOS transistor is an input terminal of the charging switch circuit, and a drain of the second MOS transistor is an output terminal of the charging switch circuit.

In this embodiment, each set of charging switch circuit may include two MOS transistors, and the MOS transistor may be an N-type MOS transistor or a P-type MOS transistor. The connection or disconnection of the two MOS tubes P1 and P2 can be controlled by the BAT port of the charging chip, and the connection or disconnection of the two MOS tubes N1 and N2 can be controlled by the BAT2 port of the charging chip.

Fig. 9 is a schematic diagram illustrating a flow direction of a charging current in a charging circuit provided by an embodiment of the present invention, as shown in fig. 9, a current loop of the charging chip for charging the first power supply may be: at the moment, MOS tubes P1 and P2 are conducted, MOS tubes N1 and N2 are disconnected, current is supplied to the positive electrode of the battery BAT from the inside of the charging chip through the BAT port, and then current flows out from the negative electrode of the battery BAT to the BAT2 port and then flows to the GND port.

The current loop of the charging chip for charging the second power supply can be as follows: at the moment, MOS tubes P1 and P2 are disconnected, MOS tubes N1 and N2 are connected, current is supplied to the anode of the battery Bat2 from the inside of the charging chip through a BAT2 port, and then current flows out to a GND port from the cathode of the battery Bat 2.

The internal structure and related circuits of the charging chip in fig. 9 are the same as those in the prior art, and this embodiment is not limited and described herein. In fig. 9, K1 is constant current control, K2 is BAT clamp, K3 is temperature compensation, and K4 is full control.

In one example, each set of charge switch circuits may include two transistors: a first triode and a second triode; the first triode and the second triode are both P-type triodes, the collector of the first triode is connected with the collector of the second triode, the emitter of the first triode is the input end of the charging switch circuit, and the emitter of the second triode is the output end of the charging switch circuit.

In an alternative embodiment, the first triode and the second triode are both N-type triodes, the emitter of the first triode is connected with the emitter of the second triode, the collector of the first triode is the input terminal of the charging switch circuit, and the collector of the second triode is the output terminal of the charging switch circuit.

In this embodiment, each charging switch circuit may include two triodes, and the triode may be an N-type triode or a P-type triode. The BAT port of the charging chip can control the conduction or disconnection of the two triodes correspondingly connected with the port, and the BAT2 port of the charging chip can control the conduction or disconnection of the two triodes correspondingly connected with the port.

The connection mode of the triode is similar to that of the MOS transistor in fig. 8, and the specific connection mode can refer to that of the MOS transistor in fig. 8. The charging current flow direction when each group of charging switch circuits includes a triode is similar to that of the MOS transistor in fig. 9, and the specific current flow direction can be seen from that of each group of charging switch circuits including a MOS transistor in fig. 9.

In an example, as shown in fig. 8 and 9, the charging chip may further be provided with a network port L1 and a network port L2, and the network port is connected with the control unit, so that the control unit obtains the charging states of the first power supply and the second power supply through the charging chip.

In this embodiment, the charging chip and the control unit may be connected to each other through the network port L1 and the network port L2 via a network, and when the charging chip is in the charging state, the charging chip sends a relevant signal to the control unit through the network port L1 and/or the network port L2, so as to indicate the charging state.

In an example, the control unit may include a main control chip, and the main control chip may be a single chip Microcomputer (MCU). Fig. 10 is a schematic circuit diagram of a main control chip according to an embodiment of the present invention, and as shown in fig. 10, a main control chip (or referred to as a main control circuit) U2 may receive a relevant signal sent by a charging chip through a network port L1 and/or L2 through a pin 14 and a pin 15, so as to obtain a charging status indication.

In an example, the food processor may further include a power display circuit, fig. 11 is a schematic diagram of a power display circuit provided in an embodiment of the present invention, and as shown in fig. 11, the power display circuit may include two-color indicator lights LED1 and LED2, and the two-color indicator lights may be, but are not limited to, traffic lights. As shown in fig. 10 and 11, a dual color indicator may be connected to the

pins

10 and 11 of the main control chip, and after the main control chip obtains the charge status indication through the

pins

14 and 15, the charge status may be displayed through different combinations of the dual

color indicator LEDs

1 and 2, and the charge status may include: a charging state, a battery full state, a fault state, or no battery access, etc.

In an example, the food processor may further include a cover opening button circuit, fig. 12 is a schematic circuit diagram of the cover opening button circuit provided in the embodiment of the present invention, as shown in fig. 12, when the button S1 is closed, the first power source or the second power source supplies power to the main control chip, and when the button S1 is turned off, the system is powered off. If the key S1 is in a closed state for a long time, the main control chip enters a low power consumption mode, and turns off corresponding load driving and AD sampling, etc. After the main control chip enters the low power consumption mode, the main control chip can be awakened through the functional key or the cover opening key and then switched on and off again.

Wherein, the key display panel can be constituteed to uncap button circuit and electric quantity display circuit. Fig. 13 is a schematic circuit diagram of a KEY display panel according to an embodiment of the present invention, as shown in fig. 13, a KEY port KEY of the KEY display panel may be connected to a pin 12 of a main control chip, and a power indication port LED1 and LED2 of the KEY display panel may be connected to

pins

11 and 10 of the main control chip, respectively.

In an example, the load circuit may include the load control circuit 431 and the motor 432 shown in fig. 6, and the main control chip may control the operation of the motor 432 through the load control circuit 431, such as controlling the operation or turning off of the motor. As shown in fig. 10, the main control chip U2 may be connected to the load control circuit through

pins

7 and 8 to control the motor.

Fig. 14 is a schematic circuit diagram of a load control circuit according to an embodiment of the present invention, as shown in fig. 14, the load control circuit may adopt two N-type MOS transistors: q1 and Q2, Q1 and Q2 are connected in series in the motor circuit as switches for controlling the operation and the turn-off of the motor. The positive pole of the motor is connected to the B + of the two batteries connected in series, the negative pole of the motor is connected with the drain of the Q1, the drain of the Q2 is connected with the source of the Q1, the first control port (pin 7) of the main control chip outputs the grid of the driving signals motor1 to Q1, and the second control port (pin 8) of the main control chip outputs the grid of the driving signals motor2 to Q2.

When the driving signal motor1 is at a high level, the drain and source of the Q1 are turned on; when the driving signal motor1 is low, the drain and source of Q1 are disconnected. When the driving signal motor2 is at a high level, the drain and source of the Q2 are turned on; when the driving signal motor2 is low, the drain and source of Q2 are disconnected.

In this embodiment, compare in the load control circuit of single MOS pipe, establish ties at the motor return circuit through two N type MOS pipes, only switch on simultaneously when two N type MOS pipes, the motor can work.

In an alternative embodiment, the load control circuit may adopt one PMOS transistor and one NMOS transistor for control, and may adopt a scheme of combining a PMOS + NMOS transistor to be connected in series to the motor circuit instead of the double NMOS transistor scheme of the above embodiment. The P-type MOS tube can be connected in series between the B + of the two batteries connected in series and the motor, and the N-type MOS tube can be connected in series between the motor and the grounding terminal. The specific implementation principle is similar to that of the dual NMOS transistor scheme, and this embodiment is not described again.

In an example, as shown in fig. 14, a sampling resistor R13 may be provided in the motor power supply circuit, and the sampling resistor R13 is used to detect the motor circuit current, so as to be used as a basis for determining whether the MOS transistor fails. When at least one MOS transistor is an N-channel MOS transistor, the sampling resistor R13 may be connected in series between the source of the bottom N-channel MOS transistor and the ground terminal, where the bottom N-channel MOS transistor is an N-channel MOS transistor close to the ground terminal. As shown in fig. 14, the bottom N-channel MOS transistor may be Q2, the source of Q2 is connected to one end of a resistor R13, and the other end of the resistor R13 is grounded.

In this embodiment, when all MOS transistors are turned on, the working current of the motor will generate a voltage drop across the sampling resistor R13, and the voltage drop is proportional to the current, i.e. there is a current in the circuit. When one MOS tube is disconnected, the working current of the motor does not generate voltage drop on the sampling resistor R13, namely, no current flows in the circuit. The voltage drop signal generated on the sampling resistor R13 can be transmitted to the sampling port (pin 13) of the main control chip through the current limiting resistor R11.

In this embodiment, the disconnection of a single MOS transistor can be controlled through a control port (pin 7 or pin 8) of the main control chip, and whether a voltage drop is generated on the sampling resistor is detected through the sampling signal AD _ motor, so that the failure detection of the single MOS transistor is realized, the working condition of the MOS transistor is detected, and the potential working hazard is eliminated. Specifically, when at least one MOS transistor is disconnected and there is a voltage drop across the sampling resistor, the main control circuit may determine that the disconnected semiconductor switch is failed.

In this embodiment, if it damages to detect there is the MOS pipe, then close still can normally work the MOS pipe immediately and make the complete machine stop work, also promptly, in many MOS pipe control circuit, even there is the risk of single MOS pipe inefficacy, also can control the shutoff of all the other MOS pipes through detecting the MOS pipe inefficacy, prevent that single MOS pipe inefficacy and have motor drive blade or screw rod pivoted wounded's risk.

In one example, VCC is a power source directly drawn from a single battery, and since the battery power decreases with discharging, the diode D3 in fig. 10 may be selected as a diode with a lower voltage drop, so that the sampling reference of the main control chip has a lower influence. And because the charging port is a USB 5V input, the diode D4 in FIG. 10 can be replaced by a small high-speed switching diode 1N4148 for comprehensive cost considerations.

In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" word structure "and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and thus, is not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A food processor, comprising: a power supply assembly, a control unit and a load circuit;

2. The food processor of claim 1, wherein the first power source and the second power source are connected in series;

3. The food processor of claim 2, wherein the first power source and the second power source are each a single battery.

4. A food processor as claimed in claim 1 or2, characterized in that the food processor further comprises: the charging circuit is used for alternately charging the first power supply and the second power supply, the charging circuit is connected with the first power supply and the second power supply, and the alternate charging means that one of the first power supply and the second power supply charges the other power supply when the other power supply reaches a set voltage.

5. The food processor of claim 4, wherein the set voltage is in a range of 4.2 ± 0.05V.

6. The food processor of claim 4, wherein the charging circuit comprises a charging chip and two sets of charging switch circuits: a first charge switch circuit and a second charge switch circuit;

7. The food processor of claim 6, wherein an input of the first charge switch circuit is coupled to a first battery BAT port of the charge chip, and an output of the first charge switch circuit is coupled to a first terminal of the first power supply;

8. The food processor of claim 7, wherein each set of charge switch circuits includes two metal oxide semiconductor field effect transistor (MOS) transistors: the MOS transistor comprises a first MOS transistor and a second MOS transistor;

or,

9. The food processor of claim 7, wherein each set of charge switch circuits includes two transistors: a first triode and a second triode;

or,

10. The food processor of claim 6, wherein the charging chip is further provided with a network port, the network port being connected to the control unit such that the control unit obtains the charging status of the first power source and the second power source through the charging chip.