CN110664282A - Portable food processor and control method - Google Patents

Portable food processor and control method Download PDF

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Publication number
CN110664282A
CN110664282A CN201810719765.9A CN201810719765A CN110664282A CN 110664282 A CN110664282 A CN 110664282A CN 201810719765 A CN201810719765 A CN 201810719765A CN 110664282 A CN110664282 A CN 110664282A
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CN
China
Prior art keywords
vacuum pump
circuit
current
voltage
battery
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810719765.9A
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Chinese (zh)
Inventor
王旭宁
文军
吴华锋
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Joyoung Co Ltd
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Joyoung Co Ltd
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Application filed by Joyoung Co Ltd filed Critical Joyoung Co Ltd
Priority to CN201810719765.9A priority Critical patent/CN110664282A/en
Publication of CN110664282A publication Critical patent/CN110664282A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00Miscellaneous implements for preparing or holding food
    • A47J43/04Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/046Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00Miscellaneous implements for preparing or holding food
    • A47J43/04Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07Parts or details, e.g. mixing tools, whipping tools
    • A47J43/0716Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the lower side

Abstract

The invention discloses a portable food processor and a control method. The problems that the existing food vacuum processing machine is unreasonable in structure, large in size, inconvenient to use, single in function, lack of current and voltage abnormal protection and low in standby power consumption are solved. The processing machine comprises a host, a stirring cup and a cup cover arranged on an opening of the stirring cup, wherein a vacuumizing assembly is arranged on the cup cover and comprises a battery, a vacuum pump circuit and a control panel, the control panel comprises a voltage detection circuit, a current detection circuit and a main control circuit, the main control circuit judges whether the battery voltage is abnormal according to voltage information, the vacuum pump is started and the current of the vacuum pump is detected, the current is judged to normally work, and a locked rotor protection scheme is started when the current is judged to be abnormal. The food processor is powered by the battery, so that the food processor is smaller in size, lighter in weight, more convenient to carry, more flexible to use and lower in maintenance cost. The function of detecting the voltage and current abnormity in the reverse connection is added.

Description

Portable food processor and control method
Technical Field
The invention relates to the technical field of food processing, in particular to a portable food processing machine and a control method.
Background
The existing food vacuum processing machine structure generally comprises a host machine, a stirring cup arranged on the host machine, and a vacuum assembly arranged on the stirring cup, wherein power supply equipment is generally arranged in the host machine, and the vacuum assembly is arranged on the stirring cup and separated from the host machine, so that a circuit needs to be led out on the host machine to the stirring cup to form an electric connection with the vacuum assembly, the structure becomes more complex, and the use by a user is not convenient. And the existing food vacuum processing machine has single function, does not have the function of detecting the current and voltage abnormity, has potential safety hazard when being used, does not have the function of standby consumption reduction, and increases energy consumption.
Disclosure of Invention
The invention mainly solves the problems of unreasonable structure, large volume and inconvenient use of a food vacuum processing machine and the problems of single function, lack of current and voltage abnormal protection and standby low power consumption function in the prior art, and provides a portable food processing machine and a control method thereof.
The technical problem of the invention is mainly solved by the following technical scheme: a portable food processor comprises a host machine, a motor arranged in the host machine, a stirring cup arranged on the host machine, a crushing knife arranged in the stirring cup and driven by the motor to rotate, and a cup cover arranged on an opening of the stirring cup, wherein a vacuumizing assembly is arranged on the cup cover, the vacuumizing assembly comprises a battery, a vacuum pump circuit and a control panel, the control panel comprises a voltage detection circuit for detecting the voltage of the battery, a current detection circuit for detecting the current of the vacuum pump and a main control circuit,
the main control circuit: and judging whether the battery voltage is abnormal according to the detection information of the voltage detection circuit, then starting the vacuum pump circuit, detecting the current state of the vacuum pump circuit by the current detection circuit, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal. The vacuumizing assembly is powered by the battery, a circuit connecting structure is not required to be additionally arranged on the host machine to be electrically connected with the vacuumizing assembly, and the vacuumizing assembly is simpler to manufacture, smaller in size and convenient to carry. And the vacuumizing assembly is arranged on the cup cover or positioned inside the cup cover and can be separated for independent use. The invention can detect voltage and current to perform undervoltage protection and locked-rotor protection on the food processing machine, thereby preventing the problem of motor overheating burning, leading the use of users to be more convenient and safer, leading the vacuum component to exist in an independent host which is not controlled by the same control part as the motor, avoiding the possibility of synchronous operation of vacuumizing and crushing, being operated independently, ensuring the integrity of vacuumizing by double detection of battery voltage detection and vacuum pump current detection, and avoiding the failure of vacuumizing.
As a preferred scheme, the control panel also comprises a power supply control circuit, a vacuum pump drive circuit and a reminding circuit, the battery is respectively connected with the vacuum pump and the input end of the power supply control circuit, the output end of the power supply control circuit is connected with a main control circuit, the main control circuit is respectively connected with the vacuum pump drive circuit and the reminding circuit, the vacuum pump drive circuit is connected with the vacuum pump, the input end of a voltage detection circuit is connected with the battery, the output end of the voltage detection circuit is connected with the main control circuit, the input end of a current detection circuit is connected with the vacuum pump circuit, and the output end of the current detection circuit is connected. In the scheme, the power supply control circuit is used for controlling the power supply of the vacuum pump, the voltage detection circuit, the current detection circuit and the main control circuit; the vacuum pump driving circuit is used for controlling the vacuum pump to work; the reminding circuit adopts light to remind the user of the complete machine state.
Preferably, the battery protection circuit further comprises an anti-reverse circuit, and the anti-reverse circuit is connected between the battery and the power supply control circuit. The anti-reverse-connection circuit is arranged in the circuit, a circuit loop can not form a loop when the battery is reversely connected, and the problem that the circuit is burnt due to reverse connection of the battery is avoided.
Preferably, the reverse connection prevention circuit comprises an isolation diode D304, the positive end of the isolation diode D304 is connected with the positive end of the battery, and the negative end of the isolation diode D304 is connected with the power supply control circuit. The anti-reverse connection circuit adopts the isolation diode, the circuit is conducted only when the battery is connected correctly, and the circuit is disconnected by the isolation diode when the battery is connected reversely, so that the circuit is protected.
The power supply control circuit comprises a key K301, a MOS tube Q303, a diode D302, a resistor R301, a resistor R303, a resistor R304, a resistor R306 and a resistor R308, wherein the positive electrode end of a battery is connected to the source electrode of the MOS tube Q301, the drain electrode of the MOS tube Q301 is connected with the power supply input pin of the main control circuit, the negative electrode end of the battery is grounded, the grid electrode of the MOS tube Q301 is connected to the source electrode of the MOS tube Q303 through the connecting resistor R304, the drain electrode of the MOS tube Q303 is grounded, the power supply control signal output pin of the main control circuit is connected with the resistor R306 and the resistor R308 in series and then is grounded, the grid electrode of the MOS tube Q303 is connected between the resistor R306 and the resistor R308, the positive electrode end of the power supply is connected with the positive electrode end of. This scheme increases power control circuit, controls evacuation subassembly and power supply. The power control circuit controls the power on through a key K301 and controls the power off through another key Ksi. Under the evacuation subassembly state, when pressing button K301, the battery passes through resistance R301, resistance R303, diode D302, button K301 switches on, MOS pipe Q301 grid circular telegram simultaneously, make MOS pipe Q301 switch on, the battery passes through MOS pipe Q301 and is the main control circuit power supply, after the main control circuit circular telegram for MOS pipe Q303 grid output high voltage signal control MOS pipe Q303 switches on, the battery passes through R301 this moment, resistance R304, MOS pipe Q303 switches on, continuously supply power for MOS pipe Q301 grid, continue to keep MOS pipe Q301 to switch on after button K301 bounces, make the evacuation subassembly power open. When the food processor is to be closed, the key Ksi is pressed, a signal is sent to the main control circuit, the main control circuit outputs low voltage to the grid electrode of the MOS tube Q303, the MOS tube Q303 is disconnected, the grid electrode of the MOS tube Q301 is powered off, the MOS tube Q301 is disconnected, and the power supply of the battery to the main control board is cut off, so that the low power consumption of the whole vacuum pumping assembly in a standby state is guaranteed, and the utilization rate of the battery is improved.
As a preferred scheme, the voltage detection circuit comprises a voltage division circuit connected between the output end of the power control circuit and the ground wire, wherein a voltage lead-out line is arranged on the voltage division circuit, and the voltage lead-out line is connected to a voltage signal input pin of the main control circuit. The voltage detection circuit detects the voltage signal of the battery, sends the acquired voltage signal to the main control circuit, and the main control circuit judges whether the voltage is abnormal according to the voltage signal.
The voltage detection circuit comprises a resistor R316, a resistor R317 and a capacitor C305, wherein one end of the resistor R316 is connected between the output end of the power control circuit and the power input pin of the main control circuit, the other end of the resistor R316 is connected with one end of the resistor R317, the other end of the resistor R317 is grounded, the capacitor C305 is connected in parallel to the resistor R317, and the voltage signal input pin of the main control circuit is connected to the connection point between the resistor R316 and the resistor R317. The power supply of the chip is stable and unchanged, and the main control circuit can judge the voltage condition of the battery by acquiring the voltage value of a point between the resistor R316 and the resistor R317 and comparing the voltage value with a built-in threshold value.
Preferably, the vacuum pump circuit comprises a vacuum pump and a power supply circuit formed by the vacuum pump; the vacuum pump driving circuit comprises a control switch connected in series in a power supply loop of the vacuum pump, and the control end of the control switch is connected with a vacuum pump control signal output pin of the main control circuit. The vacuum pump drive circuit controls the on-off of the vacuum pump power supply loop by controlling the on-off of a switch positioned on the vacuum pump power supply loop, so that the work of a vacuum pump is controlled.
The vacuum pump circuit comprises a vacuum pump P301, a diode D303 and a resistor R315, wherein the positive end of the vacuum pump P301 is connected with the positive end of the battery, the negative end of the vacuum pump P301 is connected with one end of the resistor R315, the other end of the resistor R315 is grounded, the positive end of the diode D303 is connected with the negative end of the vacuum pump P301, and the negative end of the diode D303 is connected with the positive end of the vacuum pump P301; the vacuum pump driving circuit comprises an MOS (metal oxide semiconductor) tube Q304, a resistor R312 and a resistor R314, wherein the MOS tube Q304 is connected between the negative end of a vacuum pump P301 and the resistor R315, the drain electrode of the MOS tube Q304 is connected with the negative end of the vacuum pump P301, the source electrode of the MOS tube Q304 is connected with one end of the resistor R315, the grid electrode of the MOS tube Q304 is connected with one end of the resistor R312, the other end of the resistor R312 is connected with a vacuum pump control signal output pin of the main control circuit, one end of the resistor R314 is connected with the grid electrode of the MOS; the current detection circuit comprises a resistor R313 and a capacitor C304, one end of the resistor R313 is connected to a source end of the MOS transistor Q304, the other end of the resistor R313 is respectively connected with a current signal input pin of the main control circuit and one end of the capacitor C304, and the other end of the capacitor C304 is grounded. The vacuum pump and the resistor R315 form a power circuit of the vacuum pump. The vacuum pump driving circuit is connected with an MOS (metal oxide semiconductor) tube Q304 in series on a vacuum pump power supply circuit to control the work of the vacuum pump, and a voltage signal of a grid electrode of the MOS tube Q304 is sent out by the main control circuit, namely the main control circuit controls the work of the vacuum pump through the vacuum pump driving circuit.
As a preferable scheme, the current detection circuit includes a resistor R313 and a capacitor C304, one end of the resistor R313 is connected to a source terminal of the MOS transistor Q304, the other end of the resistor R313 is respectively connected to a current signal input pin of the main control circuit and one end of the capacitor C304, and the other end of the capacitor C304 is grounded. The current detection circuit collects current information on a power supply circuit of the vacuum pump, sends the current information to the main control circuit, and the main control circuit compares the current information with a set threshold value to judge whether the current is abnormal.
A control method of a portable food processor comprises a vacuumizing step and a crushing step, and is characterized in that: and the vacuumizing step comprises the steps of judging whether the voltage of the battery is abnormal according to the voltage information, then starting a vacuum pump, judging whether the current of the vacuum pump is abnormal according to a current signal of the vacuum pump, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal. The method provided by the invention detects the voltage of the battery and the current of the vacuum pump, reminds the battery to be replaced when the voltage is abnormal, starts the locked rotor protection when the current is abnormal, cuts off the power supply, prevents the motor from being burnt out due to overheating, and improves the use experience and the use safety of a user.
As a preferable scheme, the process of judging whether the battery voltage is abnormal according to the voltage information in the step of vacuumizing is as follows:
s1, initializing a main control circuit, and starting to detect the voltage state of a battery after the main control circuit is powered on;
s2, judging whether the voltage of the battery is normal or not according to the detected voltage signal;
s3, when the battery voltage is judged to be normal, performing normal work reminding, starting a vacuum pump, timing, and detecting the working current of the vacuum pump; and when the battery voltage is judged to be abnormal, performing work abnormity reminding, then starting the vacuum pump and timing, and detecting the working current of the vacuum pump. According to the scheme, the vacuum pump is started under the condition that the voltage of the battery is normal or abnormal, and the current of the vacuum pump is detected.
As a preferred scheme, the process of judging whether the current of the vacuum pump is abnormal according to the current signal of the vacuum pump in the step of vacuumizing is as follows:
s4, judging whether the working current of the vacuum pump is smaller than a set threshold value or not;
s5, entering a normal working step when the working current is smaller than a set current threshold, and entering a locked rotor protection step when the working current is not smaller than the set current threshold;
s6, a normal working step, namely judging whether the timing time of the vacuum pump reaches a set time, if not, continuing to detect the timing time, and if so, turning off the power supply, and stopping working;
and S7, a locked rotor protection step, namely alarming and reminding, closing the vacuum pump, delaying for 5 seconds, closing the power supply and stopping working. According to the scheme, the detected currents are compared and judged, the locked rotor protection step is carried out under the abnormal current condition, the power supply is turned off and the reminding is carried out, and the motor is effectively prevented from being burnt out due to overheating.
Therefore, the invention has the advantages that:
1. the vacuum assembly is powered by a battery, and a circuit does not need to be led out of the host machine to be electrically connected with the vacuum assembly, so that the vacuum assembly is simpler to manufacture. The power supply equipment of the vacuum assembly is reduced, so that the food processor is smaller in size, lighter in weight and more convenient to carry.
2. The vacuum assembly and the food processor are arranged in a separated mode, so that the vacuum assembly can be used independently and is more flexible to use, the vacuum assembly breaks down and does not need to replace the whole cup cover, the vacuum assembly only needs to be replaced, and the maintenance cost is saved.
3. The anti-reverse connection circuit is added on the power circuit, when the battery is reversely connected, the power circuit can not form a loop, and the problem that the circuit is burnt due to reverse connection of the battery is avoided.
4. Through the detection to battery voltage and vacuum pump electric current, carry out under-voltage warning and carry out the locked rotor protection to the user under the unusual condition of judgement voltage and electric current for the user can in time change the battery, and effectively prevented motor overheat burnout, promoted user and used experience and safety in utilization.
5. The attack standby is controlled by the power control circuit, and the power is cut off after the work is finished, so that the low power consumption of the whole processing machine in the standby state is ensured, and the utilization rate of the battery is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a block diagram of one construction of the present invention;
FIG. 3 is a schematic diagram of a circuit structure of a power control circuit, an anti-reverse connection circuit and a power detection circuit in the invention;
FIG. 4 is a schematic diagram of a circuit structure of a main control circuit and a reminding circuit in the invention;
FIG. 5 is a schematic diagram of a circuit structure of a vacuum pump circuit, a vacuum pump driving circuit, and a current detection circuit according to the present invention.
FIG. 6 is a flow chart of the control method of the present invention.
1-a host machine 2-a stirring cup 3-a cup cover 4-a vacuum component 5-a battery 6-a vacuum pump circuit 7-a voltage detection circuit 8-a current detection circuit 9-a main control circuit 10-a power supply control component 11-a vacuum pump drive circuit 12-a reminding circuit 13-an anti-reverse circuit.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
the portable food processor of the embodiment, as shown in fig. 1, includes a main machine 1, a motor (not shown in the figure) built in the main machine, a stirring cup 2 placed on the main machine, a crushing knife (not shown in the figure) arranged in the stirring cup and driven by the motor to rotate, and a cup cover 3 arranged on an opening of the stirring cup, wherein a vacuum pumping assembly 4 is arranged on the cup cover.
The vacuumizing assembly can be specifically installed in the cup cover, a groove is formed in the cup cover, and the vacuumizing assembly is installed in the groove and assembled with the cup cover. As shown in fig. 2, the vacuum pumping assembly includes a battery 5, a vacuum pump circuit 6 and a control board, wherein the control board includes a voltage detection circuit 7 for detecting a battery voltage, a current detection circuit 8 for detecting a vacuum pump current, a main control circuit 9, a power control circuit 10, a vacuum pump driving circuit 11 and a reminding circuit 12. The battery links to each other with vacuum pump, power control circuit input respectively, and power control circuit output is connected with master control circuit, and master control circuit links to each other with vacuum pump drive circuit, warning circuit respectively, and vacuum pump drive circuit and vacuum pump connection, voltage detection circuit input link to each other with the battery, and voltage detection circuit output is connected on master control circuit, and current detection circuit input and vacuum pump circuit are connected, and current detection circuit output is connected on master control circuit. The battery setting is for each components and parts power supply of evacuation subassembly in the evacuation subassembly in this embodiment, and the power supply of evacuation subassembly separates with the power supply of host computer mutually, need not to set up circuit connection structure and be connected with the evacuation subassembly on the host computer, has simplified the structure, has reduced food preparation machine's volume, has reduced weight, more portable. The vacuumizing assembly can be independently used outside the main machine, the battery is easy to obtain, the use scene is not limited, and the use is more flexible. In addition, the vacuumizing assembly sends a fault without replacing the whole host or the cup cover, and only the vacuumizing assembly with the fault is replaced, so that the maintenance cost is saved.
A voltage detection circuit: and detecting the voltage of the loop of the battery and transmitting the detected voltage information to the main control circuit.
The current detection circuit: after the vacuum pump is started, the circuit of the vacuum pump circuit is detected, and the detected current information is sent to the main control circuit.
The power supply control circuit: and the power supply to the vacuum pump circuit is controlled by the master control circuit.
The vacuum pump driving circuit: and the vacuum pump is controlled by the master control circuit to start and stop.
The main control circuit: and judging whether the battery voltage is abnormal according to the detection information of the voltage detection circuit, then starting the vacuum pump, detecting the current state of the vacuum pump by the current detection circuit, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal.
The reminding circuit comprises: and the voltage state and the current state are displayed by adopting light reminding.
The power supply control circuit is shown in fig. 3, the power supply control circuit comprises a key K301, a MOS transistor Q303, a diode D302, a resistor R301, a resistor R303, a resistor R304, a resistor R306 and a resistor R308, the positive electrode end of the battery is connected to the source electrode of the MOS transistor Q301, and the drain electrode of the MOS transistor Q301 is connected to a power supply input pin VDD of the main control circuit, as shown in fig. 4; the battery negative pole end ground connection, MOS pipe Q301 grid is connected to MOS pipe Q303 source through connecting resistance R304 after, MOS pipe Q303 drain-source ground connection, main control circuit power control signal output pin P07 series resistance R306 and resistance R308 after ground connection, MOS pipe Q303 grid is connected between resistance R306 and resistance R308, be connected to diode D302 positive pole end behind power positive pole end series resistance R301 and the resistance R303, diode D302 negative pole end is connected with button K301 one end, the button K301 other end ground connection.
In order to prevent the reverse connection of the battery from causing circuit burnout, a reverse connection preventing circuit is connected in series on a connecting circuit between the positive end of the battery and the power supply control circuit, the reverse connection preventing circuit comprises an isolation diode D304, the positive end of the isolation diode D304 is connected with the positive end of the battery, and the negative end of the isolation diode D304 is connected with the source electrode of the MOS tube Q301.
The chip circuit structure adopted by the main control circuit is shown in fig. 4, and mainly comprises a power supply input pin VDD, a vacuum pump control signal output pin P12/AIN2, a voltage signal input pin P10/AIN0/INT0, a current signal input pin P13/AIN3, a closing signal input pin POO, a power supply control signal output pin P07, a reminding signal output pin P14/AIN4/PWM11 and a reminding signal output pin P20/AIN 9.
The voltage detection circuit comprises a voltage division circuit connected between the output end of the power supply control circuit and the ground wire, wherein a voltage leading-out line is arranged on the voltage division circuit and is connected to a voltage signal input pin of the main control circuit. As shown in fig. 3, the specific circuit structure of the power detection circuit includes a resistor R316, a resistor R317, and a capacitor C305, wherein one end of the resistor R316 is connected between the drain of the MOS transistor Q301 of the power control circuit and the power input pin VDD of the main control circuit, the other end of the resistor R316 is connected with one end of the resistor R317, the other end of the resistor R317 is grounded, the capacitor C305 is connected in parallel to the resistor R317, and the voltage signal input pin P10/AIN0/INT0 of the main control circuit is connected to a connection point between the resistor R316 and the resistor R317. In order to prevent voltage fluctuation between the resistor R316 and the resistor R317, a three-terminal regulator U301 is connected between the drain of the MOS transistor Q301 and the power input pin VDD of the main control circuit. In addition, if the chip is internally provided with a voltage stabilizer, the battery power detection function is realized, and a three-terminal voltage stabilizer can be omitted.
The vacuum pump circuit comprises a vacuum pump and a power supply circuit formed by the vacuum pump. As shown in fig. 5, the vacuum pump circuit includes a vacuum pump P301, a diode D303, and a resistor R315, wherein the positive terminal of the vacuum pump P301 is connected to the positive terminal of the battery, the negative terminal of the vacuum pump P301 is connected to one end of the resistor R315, the other end of the resistor R315 is grounded, the positive terminal of the diode D303 is connected to the negative terminal of the vacuum pump P301, and the negative terminal of the diode D303 is connected to the positive terminal of the vacuum pump P301.
The vacuum pump driving circuit comprises a control switch connected in series in a power supply loop of the vacuum pump, and the control end of the control switch is connected with a vacuum pump control signal output pin of the main control circuit. The specific vacuum pump driving circuit comprises an MOS tube Q304, a resistor R312 and a resistor R314, wherein the MOS tube Q304 is connected between the negative end of a vacuum pump P301 and the resistor R315 in series, the on-off of the vacuum pump circuit is controlled, the drain electrode of the MOS tube Q304 is connected with the negative end of the vacuum pump P301, the source electrode of the MOS tube Q304 is connected with one end of the resistor R315, the grid electrode of the MOS tube Q304 is connected with one end of the resistor R312, the other end of the resistor R312 is connected with a vacuum pump control signal output pin P12/AIN2 of a main control circuit, one end of the resistor R314 is connected with the grid electrode of the MOS.
The current detection circuit comprises a resistor R313 and a capacitor C304, one end of the resistor R313 is connected to a source terminal of the MOS transistor Q304, the other end of the resistor R313 is respectively connected with a current signal input pin P13/AIN3 of the main control circuit and one end of the capacitor C304, and the other end of the capacitor C304 is grounded.
As shown in fig. 4, the reminder circuit includes a resistor R310, a resistor R311, a light emitting diode LED301, and a light emitting diode LED302, wherein a reminder signal output pin P14/AIN4/PWM11 of the main control circuit is connected to one end of the resistor R310, the other end of the resistor R310 is connected to the anode of the light emitting diode LED301, and the cathode of the light emitting diode LED301 is grounded. The reminding signal output pin P20/AIN9 is connected with one end of the resistor R311, the other end of the resistor R311 is connected with the anode of the LED302, and the cathode of the LED302 is grounded.
When the vacuumizing assembly is started to work, a working key K301 is pressed, the battery passes through the resistor R301, the resistor R303, the diode D302 and the key K301 are conducted, meanwhile, the grid of the MOS tube Q301 is electrified, the MOS tube Q301 is conducted, the battery supplies power for the main control circuit through the MOS tube Q301, the main control circuit outputs a high-voltage signal to the grid of the MOS tube Q303 after being electrified to control the conduction of the MOS tube Q303, the battery passes through the R301 at the moment, the resistor R304 and the MOS tube Q303 are conducted, the power is continuously supplied to the grid of the MOS tube Q301, the MOS tube Q301 is continuously kept to be conducted after the key K301 is bounced, and the power supply of the vacuumizing. Under the condition that the main control circuit is powered on, the main control circuit starts the vacuum pump, the main control circuit sends a voltage signal to the grid electrode of the MOS tube Q304, the MOS tube Q304 is conducted, the vacuum pump circuit is conducted, and the vacuum pump starts to work. When the vacuumizing assembly is to be closed, the key Ksi is pressed, a signal is sent to the main control circuit, the main control circuit outputs low voltage to the grid electrode of the MOS tube Q303, the MOS tube Q303 is disconnected, the grid electrode of the MOS tube Q301 is powered off, and the MOS tube Q301 is disconnected to cut off the power supply of the battery to the main control board.
The embodiment also comprises a control method of the portable food processor, which comprises a vacuumizing step and a crushing step, wherein the vacuumizing step is carried out first, and then the crushing step is carried out, and the crushing step is that a motor drives the crushing knife to rotate. And the vacuumizing step comprises the steps of judging whether the voltage of the battery is abnormal according to the voltage information, then starting a vacuum pump, judging whether the current of the vacuum pump is abnormal according to a current signal of the vacuum pump, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal. As shown in fig. 6, the specific steps are as follows:
s1, initializing a main control circuit, and starting to detect the voltage state of a battery after the main control circuit is powered on;
s2, judging whether the voltage of the battery is normal or not according to the detected voltage signal;
s3, when the battery voltage is judged to be normal, performing normal work reminding, starting a vacuum pump, timing, and detecting the working current of the vacuum pump; when the battery voltage is judged to be abnormal, performing work abnormity reminding, then starting a vacuum pump and timing, and detecting the working current of the vacuum pump;
s4, judging whether the working current of the vacuum pump is smaller than a set threshold value or not;
s5, entering a normal working step when the working current is smaller than a set current threshold, and entering a locked rotor protection step when the working current is not smaller than the set current threshold;
s6, a normal working step, namely judging whether the timing time of the vacuum pump reaches a set time, if not, continuing to detect the timing time, and if so, turning off the power supply, and stopping working;
and S7, a locked rotor protection step, namely alarming and reminding, closing the vacuum pump, delaying for 5 seconds, closing the power supply and stopping working.
As can be appreciated, the vacuum pumping assembly is mounted directly above the cup cover and assembled with the cup cover. In addition, the vacuumizing assembly can also be integrated with the cup cover, namely the cup cover comprises an upper cover and a lower cover, and the vacuumizing assembly is arranged in an installation cavity formed between the upper cover and the lower cover.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms host, blender cup, cup lid, vacuum assembly, battery, etc. are used more generally herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. The utility model provides a portable food preparation machine, includes the host computer, embeds the motor in the host computer, places the stirring cup on the host computer, sets up by rotatory crushing sword of motor drive and the bowl cover of setting on stirring cup opening in the stirring cup, its characterized in that: the cup cover is provided with a vacuumizing assembly, the vacuumizing assembly comprises a battery, a vacuum pump circuit and a control panel, the control panel comprises a voltage detection circuit for detecting the voltage of the battery, a current detection circuit for detecting the current of the vacuum pump and a main control circuit,
the main control circuit: and judging whether the battery voltage is abnormal according to the detection information of the voltage detection circuit, then starting the vacuum pump circuit, detecting the current state of the vacuum pump circuit by the current detection circuit, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal.
2. The portable food processor as defined in claim 1, wherein the control panel further comprises a power control circuit and a vacuum pump driving circuit, the battery is connected to the vacuum pump and an input terminal of the power control circuit, respectively, an output terminal of the power control circuit is connected to the main control circuit, the main control circuit is connected to the vacuum pump driving circuit, the vacuum pump driving circuit is connected to the vacuum pump, an input terminal of the voltage detection circuit is connected to the battery, an output terminal of the voltage detection circuit is connected to the main control circuit, an input terminal of the current detection circuit is connected to the vacuum pump circuit, and an output terminal of the current detection circuit is connected to the main control circuit.
3. The portable food processor as defined in claim 2, further comprising an anti-reverse circuit connected between the battery and the power control circuit.
4. The portable food processor as defined in claim 3, wherein the anti-reverse circuit includes an isolation diode D304, a positive terminal of the isolation diode D304 being connected to a positive terminal of the battery, and a negative terminal of the isolation diode D304 being connected to the power control circuit.
5. The portable food processor as defined in claim 2, wherein the voltage detecting circuit includes a voltage dividing circuit connected between the output terminal of the power control circuit and a ground line, and a voltage lead-out line is provided on the voltage dividing circuit, the voltage lead-out line being connected to the voltage signal input pin of the main control circuit.
6. A portable food processor as claimed in claim 1 or claim 2, wherein the vacuum pump circuit comprises a vacuum pump and its associated power supply circuit; the vacuum pump driving circuit comprises a control switch connected in series in a power supply loop of the vacuum pump, and the control end of the control switch is connected with a vacuum pump control signal output pin of the main control circuit.
7. The portable food processor as claimed in claim 1 or 2, wherein the current detection circuit comprises a resistor R313 and a capacitor C304, one end of the resistor R313 is connected to the source terminal of the MOS transistor Q304, the other end of the resistor R313 is respectively connected to the current signal input pin of the main control circuit and one end of the capacitor C304, and the other end of the capacitor C304 is grounded.
8. A method of controlling a portable food processor, using the food processor of any one of claims 1-7, comprising a step of evacuating and a step of comminuting, characterized by: and the vacuumizing step comprises the steps of judging whether the voltage of the battery is abnormal according to the voltage information, then starting a vacuum pump, judging whether the current of the vacuum pump is abnormal according to a current signal of the vacuum pump, normally working when the current is judged to be normal, and starting a locked rotor protection scheme when the current is judged to be abnormal.
9. The control method of claim 8, wherein the step of determining whether the battery voltage is abnormal according to the voltage information in the step of evacuating comprises:
s1, initializing a main control circuit, and starting to detect the voltage state of a battery after the main control circuit is powered on;
s2, judging whether the voltage of the battery is normal or not according to the detected voltage signal;
s3, when the battery voltage is judged to be normal, performing normal work reminding, starting a vacuum pump, timing, and detecting the working current of the vacuum pump; and when the battery voltage is judged to be abnormal, performing work abnormity reminding, then starting the vacuum pump and timing, and detecting the working current of the vacuum pump.
10. The control method of a portable food processor as defined in claim 9, wherein the step of determining whether the vacuum pump current is abnormal according to the vacuum pump current signal in the step of evacuating comprises:
s4, judging whether the working current of the vacuum pump is smaller than a set threshold value or not;
s5, entering a normal working step when the working current is smaller than a set current threshold, and entering a locked rotor protection step when the working current is not smaller than the set current threshold;
s6, a normal working step, namely judging whether the timing time of the vacuum pump reaches a set time, if not, continuing to detect the timing time, and if so, turning off the power supply, and stopping working;
and S7, a locked rotor protection step, namely alarming and reminding, closing the vacuum pump, delaying for 5 seconds, closing the power supply and stopping working.
CN201810719765.9A 2018-07-03 2018-07-03 Portable food processor and control method Pending CN110664282A (en)

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