CN211270253U

CN211270253U - Food processing machine

Info

Publication number: CN211270253U
Application number: CN201920979193.8U
Authority: CN
Inventors: 王旭宁; 王腾飞; 詹应安; 余青辉
Original assignee: Joyoung Co Ltd
Current assignee: Hangzhou Jiuchuang Home Appliances Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-08-18
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a food processing machine, which comprises a first body and a second body which can be separated, wherein a master control circuit board is arranged on the first body, a slave control circuit board is arranged on the second body, the master control circuit board is electrically connected with the slave control circuit board through a coupler, a power module is arranged on the master control circuit board, the power module outputs a first direct current power supply with voltage V1, the first direct current power supply is electrically connected with the slave control circuit board through a power supply line, the food processing machine is characterized in that the master control circuit board modulates a master control communication signal into a carrier signal and transmits the carrier signal to the slave control circuit board by taking the first direct current power supply as a baseband signal, an LDO voltage stabilizer is arranged on the slave control circuit board, the carrier signal passes through the LDO voltage stabilization and then outputs the slave control power supply, a slave control chip and a second voltage comparator are arranged on the slave control circuit board, and the carrier signal is output to the slave control chip after being demodulated by the second voltage comparator. Effectively saving resources.

Description

Food processing machine

Technical Field

The utility model relates to a food processing field particularly, relates to a food preparation machine.

Background

The existing food processing machines are more and more in variety, such as a broken food processor, a soybean milk machine and the like, and more in functions and forms, such as making soybean milk, fruit juice, ice cream/milk shake, crushed ice, rice paste, fine grinding, meat grinding and the like, and also such as an upper motor, a lower motor or a display operation side and the like, so that the resulting multi-form is multifunctional, corresponding controls are required to be arranged at different positions, communication is required to be carried out among different controls, in addition, various working state signals of the food processing machine need to be collected through a collecting unit, such as an anti-overflow signal, a water level signal, a temperature signal, a cup body identification signal, a cover opening detection signal and the like, each working state signal of the existing food processing machine needs to be transmitted through respective lines, or transmitted after being processed, but at least one transmission line of.

Use the broken wall cooking machine as an example, it includes the frame and sets up the cup on the frame, is equipped with signal detection device in the cup, and signal detection device is including locating the signal acquisition unit that detects the operating condition signal of broken wall cooking machine, and the port through the coupler after the operating condition signal of broken wall cooking machine is gathered to the signal acquisition unit transmits the control power supply board to the frame in, and the control power supply board is according to the concrete information output control signal control broken wall cooking machine work of operating condition signal. The current transmission mode is that, the coupler has a plurality of coupling ports, there is at least one power port, a power supply for will controlling the power strip output transmits for signal acquisition unit, in addition, locate several signal acquisition units on the cup, then need set up several coupling ports on the coupler, in order to carry out the transmission of gathering the signal, the port quantity that leads to the coupler this moment is more, lead to the increase of the volume of coupler, its processing, manufacturing cost, installation complexity etc. all corresponding increase, simultaneously because the contact of coupler is connected, there is the decay to original signal, lead to the inaccurate problem of signal detection to exist.

Although in the prior art, there is a detection chip arranged on the cup body, and the detection chip transmits the collected signals through the coupler port after processing, at this time, the detection chip and the control power board need to perform two-way communication, and two paths of coupling ports are also necessary, so that the problem of design of the coupler cannot be solved effectively. In addition, although there is a method of wirelessly transmitting signals in the prior art, although this transmission method can solve the above problems, the cost is high, the wireless transmission causes problems such as signal accuracy, cost, and electromagnetic interference, and a mounting space is required for coil mounting and the like involved in the wireless transmission.

For the soymilk machine, corresponding problems also exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to reach the purpose just provides a food preparation machine, can overcome the shortcoming and not enough that exist among the prior art, carries out the transmission of signal through multiplexing power supply line, utilizes the LDO stabiliser to take out in with carrier signal and utilizes the signal that voltage comparator just can obtain the transmission when leaving DC power supply. The port of the coupler is fully and reasonably utilized, and the reliability of signal transmission is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a food processor comprises a first body and a second body which can be separated, wherein the first body is provided with a master control circuit board, the second body is provided with a slave control circuit board, the master control circuit board is electrically connected with the slave control circuit board through a coupler, a power supply module is arranged on the master control circuit board, the power supply module outputs a first direct current power supply with voltage V1, the first direct current power supply is electrically connected with the slave control circuit board through a power supply power line, characterized in that the master control circuit board modulates master control communication signals into carrier signals by taking the first direct current power supply as baseband signals and transmits the carrier signals to the slave control circuit board, the slave control circuit board is provided with an LDO voltage stabilizer, the carrier signal is output to a slave control power supply after being stabilized by the LDO voltage, and the slave control circuit board is provided with a slave control chip and a second voltage comparator, and the carrier signal is demodulated by the second voltage comparator and then output to the slave control chip.

Further, the main control circuit board comprises a main control chip, and the main control chip controls the main control communication signal to be output in a square wave form.

Further, the amplitude of the master communication signal is V2, the slave power supply voltage is V3, and the voltage difference between the input voltage and the output voltage of the LDO regulator is Δ V3, where V1> V3+ Δ V3+ V2.

Further, the master communication signal is a square wave signal with a high level of zero voltage.

Furthermore, a slave control constant current load is arranged on the slave control circuit board, the power supply line is electrically connected with the slave control constant current load, the slave control chip outputs a slave control communication signal to act on the slave control constant current load, a first resistor is arranged on the master control circuit board, the power supply line is electrically connected with the first direct current power supply through the first resistor, and the power supply line is electrically connected with the master control chip through a first voltage comparator.

Further, the current of the slave control constant-current load is I1, the line resistance of the power supply line is R2, the resistance value of the first resistor is R1, the voltage of the slave control power supply is V3, the voltage difference between the input voltage and the output voltage of the LDO regulator is delta V3, and I1 < (V1-V3-delta V3)/(R1+ R2).

Furthermore, the interruption pin of the master control chip is electrically connected with the first voltage comparator, the interruption pin of the slave control chip is electrically connected with the second voltage comparator, the master control chip firstly performs band-pass filtering after receiving a signal, and the slave control chip firstly performs band-pass filtering after receiving the signal.

Further, the slave control constant current load comprises a first slave control constant current load and a second slave control constant current load, the slave control chip detects the power supply power line in real time and judges the baseband signal voltage, and the corresponding slave control constant current load is selected according to the baseband signal voltage.

Further, the food processor comprises a load, and when the load works or voltage fluctuation can be generated in a specific working state, the communication between the master control chip and the slave control chip is adjusted.

Further, the food processor comprises a load, and when the master control chip is communicated with the slave control chip, the power of the load is kept unchanged.

After the technical scheme is adopted, the utility model has the advantages of as follows: the weak current carrier signal transmission is carried out through the multiplexing power supply line, so that port resources for data transmission are saved, particularly when the multiplexing power supply line and the coupler are used for data transmission through the coupler, the coupler port is saved, and meanwhile, the cost and the size of the coupler are reduced, and the installation complexity is reduced. Secondly, for the carrier signal, the slave control power supply is output through the LDO voltage stabilization, which is beneficial to matching the baseband signal model output by the power supply module, so as to ensure the reliability of signal transmission and the power supply, and at the moment, the corresponding communication signal can be obtained only by demodulating the carrier signal through the voltage comparator. Meanwhile, under the condition, the bidirectional communication is more convenient, and the communication from the slave control chip to the master control chip is obtained only by modulating the current of the constant-current load machine type.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a schematic block diagram of a control of a food processor of the present invention;

FIG. 2 is a schematic diagram of a signal transmission status of a food processor according to the present invention;

fig. 3 is a schematic block diagram of another control of a food processor according to the present invention.

Detailed Description

A food processor, as shown in figure 1, comprises a master control circuit board and a slave control circuit board, wherein the master control circuit board is communicated with the slave control circuit board, a power supply module is arranged on the master control circuit board, in this embodiment, the power module is a switching power supply, which outputs a first dc power of a voltage V1, the first direct current power supply is electrically connected with the slave control circuit board through a power supply line, the master control circuit board modulates master control communication signals into carrier signals by taking the first direct current power supply as baseband signals and transmits the carrier signals to the slave control circuit board, the slave control circuit board is provided with an LDO voltage stabilizer, the carrier signal passes through the LDO voltage stabilizer and then is output to a slave control power supply, and the slave control circuit board is provided with a slave control chip and a second voltage comparator, and the carrier signal is demodulated by the second voltage comparator and then output to the slave control chip.

In the above process, the carrier signal is demodulated by the second voltage comparator to output a signal which may be the same signal as the master control communication or a matched signal, so that the slave control chip can obtain the information transmitted by the master control chip.

In this embodiment, food preparation machine has included separable first body and second body, and the main control circuit board can be at the first body, follows the accuse circuit board at the second body, and of course, the main control circuit board can be at the second body, follows the accuse circuit board at first body the utility model discloses in, the main control does not represent control subordinate relation between the two with following the accuse, mainly lies in power module namely switching power supply's position design, and switching power supply is located the main control circuit board, because switching power supply needs to provide used DC power supply. With broken wall cooking machine, under general condition, first body is equivalent to the frame, and the second body is equivalent to the cup, and the main control circuit board sets up in the frame, follows the circuit board and sets up in the cup, and of course, if switching power supply is in the cup, the main control circuit board is the circuit board that sets up on the cup.

In this embodiment, in addition to the master control circuit board transmitting the master control communication signal to the slave control circuit board and the slave control power supply, the slave control circuit board may also transmit the signal to the master control circuit board. As shown in fig. 1, a slave control constant current load is arranged on the slave control circuit board, the power supply line is electrically connected to the slave control constant current load, the slave control chip outputs a slave control communication signal to act on the slave control constant current load, a first resistor is arranged on the master control circuit board, the power supply line is connected to the first dc power supply through the first resistor, and the power supply line is electrically connected to the master control chip through a first voltage comparator.

Of course, the signal transmission may be performed from the master control circuit board to the slave control circuit board, or the unidirectional communication may be performed from the slave control circuit board to the master control circuit board, or the bidirectional communication may be performed between the master control circuit board and the slave control circuit board, which is taken as an example in this embodiment.

In this embodiment, the specific working process is as follows:

1. the master control circuit board sends, receives from the master control circuit board:

firstly, the main control chip processes the main control communication signal into a square wave signal, and the process can be that the main control chip is internally provided with a corresponding square wave signal and outputs the corresponding square wave signal, or the main control chip forms the corresponding square wave signal through a main control constant current load. In this embodiment, the master communication signal processed by the master chip is a square wave signal with a high level of 0 and an amplitude of V2 as shown in (a) of fig. 2, and the voltage of the first dc power supply is V1, specifically as shown in (b) of fig. 2, so that the carrier signal formed by the baseband signal and the master communication signal is shown in (c) of fig. 2, and the carrier signal is output from the operating power supply of the slave circuit board, i.e., the slave control voltage V3 through the LDO regulator, and V3 ensures the operation of the dc power supply devices on the slave circuit board, such as the slave control chip, the detection device, and the like. In addition, the carrier signal is demodulated by the second voltage comparator to output a signal as shown in (d) of fig. 2, wherein the voltage V4 is logically matched with V2, and the master communication signal can be obtained from the voltage V4 and the voltage V2. Here, the second voltage comparator output signal needs to match the logic level of the slave chip.

2. The slave control circuit board sends, and the master control circuit board receives:

the slave control chip processes information needing communication into a slave control communication signal, a slave control constant current load is controlled according to the signal condition of the slave control communication signal, the slave control constant current load and a first resistor form similar voltage division through a power supply line, the slave control constant current load is similar to the on-off of a switch, a current modulation state is formed on a loop, and therefore signals of high and low levels are formed on a main control circuit board end, and the signals are processed into signals usable by the main control chip through a first voltage comparator. Thus, the communication process of sending the slave control circuit board to the master control circuit board is completed.

In the present embodiment, since the voltage of the first dc power supply is a weak-current dc power supply and the voltage of the communication signal is also a weak-current digital signal, in order to ensure the accuracy of data transmission, in the present embodiment, V1> V2+ V3, at this time, V2 is the voltage of the master communication signal, and if it is a square wave signal with a high level of 0 and a low level of auxiliary V2, V1> V3-V2.

In this process, since the carrier signal needs to pass through the LDO output slave control power supply V3, and there is a voltage difference Δ V3 between the input and the output of the LDO regulator, V1> V3+ Δ V3+ V2. During transmission, the baseband signal V1 is output from the switching power supply, and there is generally corresponding fluctuation Δ V1, V1> V3+ Δ V3+ V2- Δ V1. Otherwise, the signal is mistransmitted due to the small pressure difference between the baseband signal voltage and the master control communication signal, which affects the normal work of the food processor.

When the slave control circuit board transmits and the master control circuit board receives, the current of the slave control constant current load is I1, the wire resistance of the power supply power line is R2, the resistance value of the first resistor is R1, the voltage of the slave control power line is V3, the voltage difference between the input voltage and the output voltage of the LDO voltage stabilizer is delta V3, and I1 < (V1-V3-delta V3)/(R1+ R2). The proper constant current source is selected to accurately transmit data.

Specifically, in this embodiment, when the master control chip and the slave control chip receive signals, both the master control chip and the slave control chip use pins with an interrupt function, and perform decoding verification after performing band-pass filtering on signal data. The method can filter out interference signals outside the communication range, is beneficial to decoding and checking signals in subsequent steps, and enhances the stability of carrier signal communication.

Of course, in this embodiment, both the slave control communication signal and the master control communication signal need to be transmitted after being subjected to the packet coding by the corresponding control chip, and are transmitted in the form of digital signals. In the process, signal data to be sent is added with a data frame head, a checksum and a frame tail and then is sent, the specific signals are signals of temperature, circuit board temperature, overflow prevention, water level and the like, wherein the temperature signals do not continuously jump, the received temperature signals are detected according to the change continuity of the signals, and if the signals continuously jump, the abnormal signals are ignored. On the premise of meeting the real-time performance of data, arbitration and calculation are carried out according to the data of a plurality of data frames in a program to obtain an optimal sampling value. Adding a data for counting data packets except for transmitting effective data, adding 1 to the data by the chip every time the chip sends a frame of data, restarting circulation from 0 after 255, and judging the continuous condition of the data frames according to the counting data in the data frames after receiving the data.

This is because data needs to pass through the coupler, and the contact resistance of the coupler is unstable, and particularly in the process of working of the electric load, corresponding vibration is caused, which affects the contact resistance of the upper and lower couplers, possibly causing communication data confusion, so that the chip receives wrong data, thereby causing unstable program operation and causing more serious consequences. The traditional checksum method checks the condition that the checksum is correct with probability and the data in the frame is incorrect, and the use of a complex check algorithm can seriously affect the data transmission efficiency. The optimization scheme effectively avoids the condition that the transmission reliability of data is influenced due to the instability of a transmission path through multiple optimization and verification, and ensures the safety and reliability of the pulping process.

Of course, further, the slave control constant current loads include a first slave control constant current load and a second slave control constant current load, the slave control chip detects the power supply power line in real time and judges the baseband signal voltage, and selects the corresponding slave control constant current load according to the baseband signal voltage, since I1 < (V1-V3- Δ V3)/(R1+ R2), if the baseband voltage fluctuates unexpectedly, the corresponding slave control constant current load can be timely adjusted and selected to ensure the transmission reliability. The switching power supply is generally low in precision and weak in loading capacity, when the switching power supply is lightly loaded, the output voltage is higher, and when the switching power supply is heavily loaded, the output voltage is lower and fluctuates greatly. When the V1 is higher, a larger constant current load is used; when V1 is low, a small constant current load is used. Therefore, when the voltage comparator is used, the reference voltage of the voltage comparator can be correspondingly controlled, so that a corresponding communication signal can be effectively demodulated, the voltage of a power supply line can be detected in real time, a voltage AD value queue is stored, the reference of the voltage comparator is dynamically adjusted according to the AD value queue, and the high and low levels of the communication signal are judged, wherein the reference comprises a first voltage comparator and a second voltage comparator.

In a food processor, there are electric and electric heating loads for food processing and other corresponding loads, and some loads may generate large fluctuation in work process, such as a motor, which is an inductive load, and there is vibration in work process in addition to electromagnetic interference, which has large influence on a coupler, so that all of them can correspond to accuracy of data transmission, and for signals to be transmitted, there are some signal accuracy requirements higher, such as a temperature signal anti-overflow signal, etc., so that in the transmission process, it is necessary to adjust transmission timing according to specific situations.

For example, in the process of the operation of the motor, the frequency of data transmission is reduced, or data transmission is not performed, or for example, in the process of data transmission, the power of the load is ensured to be constant, and the voltage fluctuation caused by power change is reduced, or in the process of data transmission, the rotating speed of the motor is adjusted to be matched with the data transmission. Or in the working engineering of the motor, the communication frequency is adjusted to avoid the interference frequency band of the motor. Specifically, in this embodiment, the communication frequency is set below 9KHZ, avoiding the interference range while optimizing the EMI performance of the food processor.

In addition, in order to reduce the standby power consumption of the food processor, in the standby state, the communication frequency can be reduced, the transmission time interval of each frame of data is increased, and a high level is sent by default between two frames of data transmission to enable the corresponding constant current load to be closed.

In this embodiment, there are more modes of probably implementing in data transmission, take current soybean milk machine as an example, including aircraft nose and cup, the aircraft nose is detained and is arranged in on the cup, be equipped with the socket of connecting mains supply on the cup, switching power supply sets up on the circuit board in the cup, main control circuit board promptly, and be equipped with main control chip on the main control circuit board, be used for controlling the heating device who sets up on the cup and the motor in the aircraft nose, aircraft nose and cup spare are equipped with the coupler, the coupler includes the motor live wire that is used for controlling the motor, motor zero line, the ground wire, and aircraft nose power supply line, be equipped with the aircraft nose circuit board in the aircraft nose, promptly from the accuse circuit board, as shown in fig. 3, from accuse circuit board establish from accuse chip, from accuse chip is used for anti-overflow detection, temperature detection, water level detection, and board. So, the master control circuit board communicates with the slave control circuit board, that is to say, master control chip and slave control chip carry out carrier communication through power supply line, master control chip can be with the signal on the cup to and the information transmission that the flow needs to carry out gives the slave control chip, and the slave control chip then need be with the temperature that detects, the spill proof, signals such as water level give master control chip, in addition, the slave control chip also can carry out the control of motor, like this, master control chip then need be given the slave control chip with the control command transmission to the motor. In addition, the display control can be arranged on the machine head or the cup body. Of course, the signal detection can also be arranged on the cup body. Are not listed here.

In the present embodiment, in order to better ensure that the input terminal of the LDO regulator is pulled down instantaneously when the power supply line is transmitting data, a rectifying diode D1 and an energy storage capacitor C1 are disposed at the input terminal of the LDO regulator.

The weak current carrier signal transmission is carried out through the multiplexing power supply line, so that port resources for data transmission are saved, particularly when the multiplexing power supply line and the coupler are used for data transmission through the coupler, the coupler port is saved, and meanwhile, the cost and the size of the coupler are reduced, and the installation complexity is reduced. Secondly, for the carrier signal, the slave control power supply is output through the LDO voltage stabilization, which is beneficial to matching the baseband signal model output by the power supply module, so as to ensure the reliability of signal transmission and the power supply, and at the moment, the corresponding communication signal can be obtained only by demodulating the carrier signal through the voltage comparator. Meanwhile, under the condition, the bidirectional communication is more convenient, and the communication from the slave control chip to the master control chip is obtained only by modulating the current of the constant-current load machine type.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. A food processor comprises a first body and a second body which can be separated, wherein the first body is provided with a master control circuit board, the second body is provided with a slave control circuit board, the master control circuit board is electrically connected with the slave control circuit board through a coupler, a power supply module is arranged on the master control circuit board, the power supply module outputs a first direct current power supply with voltage V1, the first direct current power supply is electrically connected with the slave control circuit board through a power supply power line, characterized in that the master control circuit board modulates master control communication signals into carrier signals by taking the first direct current power supply as baseband signals and transmits the carrier signals to the slave control circuit board, the slave control circuit board is provided with an LDO voltage stabilizer, the carrier signal is output to a slave control power supply after being stabilized by the LDO voltage, and the slave control circuit board is provided with a slave control chip and a second voltage comparator, and the carrier signal is demodulated by the second voltage comparator and then output to the slave control chip.

2. The food processor of claim 1, wherein the master control circuit board includes a master control chip that controls output of master control communication signals in the form of square waves.

3. The food processor of claim 2, wherein the master communication signal has an amplitude of V2, the slave power supply voltage is V3, and the LDO regulator has an input to output voltage differential of Δ V3, wherein V1> V3+ Δ V3+ V2.

4. The food processor of claim 2, wherein the master communication signal is a square wave signal with zero voltage high.

5. The food processor as claimed in claim 1, wherein a slave control constant current load is provided on the slave control circuit board, the power supply line is electrically connected to the slave control constant current load, the slave control chip outputs a slave control communication signal to act on the slave control constant current load, a first resistor is provided on the master control circuit board, the power supply line is electrically connected to the first dc power supply through the first resistor, and the power supply line is electrically connected to the master control chip through a first voltage comparator.

6. The food processor of claim 5, wherein the current of the slave constant current load is I1, the line resistance of the power supply line is R2, the resistance of the first resistor is R1, the voltage of the slave control power supply is V3, the voltage difference between the input voltage and the output voltage of the LDO regulator is Δ V3, and I1 < (V1-V3- Δ V3)/(R1+ R2).

7. The food processor of claim 5, wherein the interrupt pin of the master control chip is electrically connected to the first voltage comparator, the interrupt pin of the slave control chip is electrically connected to the second voltage comparator, the master control chip performs band-pass filtering after receiving the signal, and the slave control chip performs band-pass filtering after receiving the signal.

8. The food processor of claim 5, wherein the slave-controlled constant-current loads comprise a first slave-controlled constant-current load and a second slave-controlled constant-current load, and the slave control chip detects the power supply line in real time, determines the baseband signal voltage, and selects the corresponding slave-controlled constant-current load according to the baseband signal voltage.

9. The food processor of claim 2, comprising a load that regulates communication between the master control chip and the slave control chip when voltage fluctuations occur during operation.

10. The food processor of claim 2, wherein the food processor includes a load, and wherein the power of the load remains unchanged while the master control chip communicates with the slave control chip.