KR20230035345A - Juicer control system and method - Google Patents

Abstract

The present invention relates to a juicer control system and method, and a configuration diagram of a juicer control system according to the present invention, a current sensing unit for measuring a current change amount according to material juice in real time, and a current change amount measured by the current sensing unit It includes a control unit for receiving and determining a juice extraction end state, and a motor unit for driving forward or reverse rotation according to a drive signal from the control unit.

Description

Juicer control system and method

The present invention relates to a juicer control system and method, and more particularly, by providing a function of automatically stopping a juicer by detecting the end of juice extraction and a function of easily separating a drum housing coupled to a motor shaft of a main body, It relates to a control system and method for a juicer that can improve the convenience and safety of the juicer.

For health, more and more people make and eat green juice or juice at home, and for this purpose, many devices have been disclosed that allow you to easily extract juice from vegetables or fruits at home.

Conventionally, a juicer made juice by centrifugal separation by putting materials into an inlet and crushing them by blades rotating at high speed. However, these juicers can destroy the unique taste and nutrients of the ingredients in the process of high-speed crushing, and it is difficult to make green juice from vegetables with stems or leaves, and it is difficult to make juice from fruits such as kiwi or strawberries with high viscosity. In fact, it was impossible to make soymilk from soybeans.

In order to solve this problem, Korean Registered Patent No. 10-0793852, filed and registered by the present applicant, uses a method of compressing and pulverizing materials between a mandrel with net holes and a screw rotating at low speed, soybeans It has the effect of making juice by grinding and squeezing fruits with high viscosity such as tomatoes, kiwi, and strawberries on a grater to make soymilk using the principle of squeezing by grinding with a millstone, so that the problems of conventional juicers as described above can be solved. there was.

However, when using such a juicer, there is a problem that the user must perform a stop operation by directly manipulating the button after the juice is finished, and if the user does not press the stop button, the screw continues to idle.

There is also a juicer equipped with a timer function for a certain period of time, but there is a problem in that the operation is stopped when the juice is not completed as it is driven only for a preset time without considering the juice state.

In addition, when the drum housing is seated on the main body, the screw axis inside the drum housing and the motor axis of the main body are coupled. During the juice extraction process, high pressure is generated between the juice material and the screw, and this causes high pressure between the screw axis and the motor shaft after juice is completed. Due to this, a phenomenon in which the drum housing is not separated from the main body often occurs.

An object of the present invention is to solve such conventional problems, and to provide a juicer control system and method capable of automatically detecting the end state of juice extraction by monitoring the load according to material juice in real time.

Another object is to provide a juicer control system and method that facilitates canceling the coupled state between a screw shaft and a motor shaft by rotating the motor in reverse for a predetermined period of time after juice is completed according to forward rotation of the motor.

The above object is, according to the first aspect of the present invention,

In the juicer control method for controlling the automatic shutdown of the juicer in which juice is performed by forward rotation of the motor,

A first step of determining whether to enter the second step based on the first load change value of the motor; and

A second step of determining whether to end juice based on the second load change value of the motor and the timer,

It is achieved by a juicer control method.

Here, the first load change value of the motor is based on the difference between the current current value of the motor and the past current value before the first time, and the second load change value of the motor is based on the current current value of the motor and Based on the difference from the past current value before the second time, wherein the first time and the second time may be the same or different,

Each of the first step and the second step is determined by comparing the first load change value of the motor and the second load change value of the motor with a first reference value and a second reference value, which may be the same or different from each other, respectively. It is characterized by doing.

Furthermore, the second step operates the timer when entering the second step, and as a result of comparing the second load change value and the second reference value, when the second load change value exceeds the second reference value, the timer is initialized, and when the second hatching change value does not exceed the second reference value, it is determined that the juice extraction ends when the timer expires.

In addition, the first step further includes determining whether to enter the second step based on the additional load change value, wherein the additional load change value is the difference between the current current value of the motor and the measured highest current value. based on the difference

The first step is characterized in that the additional load change value is determined by comparing it with a third reference value.

In addition, the first step further comprises determining whether juice extraction is terminated based on an additional timer when it is determined that the second step is not entered,

Reference values of the timer and the additional timer may be different.

In addition to this, the first step is characterized in that it starts after a predetermined time elapses after the motor is operated.

Additionally, if it is determined that the juice extraction is finished, it is preferable to further include, after the second step, reversely rotating the motor for a predetermined time.

Furthermore, the above object is also according to the second aspect of the present invention,

In the juicer control system for controlling the automatic termination of the juicer in which juice is performed by forward rotation of the motor,

A motor operated in forward or reverse rotation;

a load measurement unit for measuring a load of the motor; and

a first step of determining whether to enter a second step based on a first load change value of the motor based on a measurement result from the load measurer; And a control unit for performing a second step of determining whether to end juice based on a second load measurement change value of the motor and a timer based on the measurement result from the load measurement unit,

This is achieved by a juicer control system.

Here, the first load change value of the motor is based on the difference between the current current value of the motor and the past current value before the first time, and the second load change value of the motor is based on the current current value of the motor and Based on the difference from the past current value before the second time, wherein the first time and the second time may be the same or different,

Each of the first step and the second step is determined by comparing the first load change value of the motor and the second load change value of the motor with a first reference value and a second reference value, which may be the same or different from each other, respectively. It is characterized by doing.

Furthermore, the second step operates the timer when entering the second step, and as a result of comparing the second load change value and the second reference value, when the second load change value exceeds the second reference value, the timer is initialized, and when the second hatching change value does not exceed the second reference value, it is determined that the juice extraction ends when the timer expires.

In addition, the first step further includes determining whether to enter the second step based on an additional load change value based on a measurement result from the load measuring unit, wherein the additional load change value is Based on the difference between the current value and the highest measured current value,

The first step is characterized in that the additional load change value is determined by comparing it with a third reference value.

In addition, the first step further comprises determining whether juice extraction is terminated based on an additional timer when it is determined that the second step is not entered,

Reference values of the timer and the additional timer may be different.

In addition to this, the first step is characterized in that it starts after a predetermined time elapses after the motor is operated.

Additionally, if it is determined that the juice extraction is finished, it is preferable to further include, after the second step, reversely rotating the motor for a predetermined time.

A juicer control system according to the present invention includes a current sensing unit that measures the amount of current change according to material juice in real time, a control unit that receives the current change amount measured by the current sensing unit and determines the end state of juice extraction, and a drive signal of the control unit. and a motor that drives forward or reverse rotation according to the current sensor, and the current sensor measures the current value input from the CT (Current Trans) sensing circuit in real time and transfers it to the control unit, and the control unit measures the current value before the set time. Calculate the difference between the current value and the current value as the amount of change, and if the amount of change is within a certain range, it is determined that there is no juice material (juice completion), and an automatic stop signal is transmitted to the motor unit, or the highest current input from the CT detection circuit stored in real time to compare the current measurement value and the change in the maximum current value to determine that there is no juice (juice extraction completed), and after juice is completed, the motor is rotated in reverse for a certain period of time to engage the screw shaft and the motor shaft. After releasing the state, the motor stops.

In addition, the juice juicer control method according to the present invention measures the amount of current change according to the material juice in real time through a current sensor (S10), and determines the end state of juice extraction with the amount of current change measured in step S10 through a control unit Step (S20) and step (S30) of transmitting any one of forward rotation, reverse rotation, and stop signals to the motor unit according to the juice extraction end state in step S20, wherein step S20 is before the set time The difference between the current value and the current value is calculated as the amount of change, and if the amount of change is within a certain range, it is determined that there is no juice material (juice extraction completed), or the current measured value is saved in real time as the highest current value input from the CT detection circuit. Comparing the change in the maximum overcurrent value to determine that there is no juice material (juice extraction completed), and after juice extraction is completed, the motor is rotated in reverse for a certain period of time to release the coupling between the screw shaft and the motor shaft, and then the motor stops It is characterized by being

According to the juicer control method of the present invention as described above, by monitoring the load according to the material juice in real time and automatically detecting the juice extraction end state, it is possible to finish juice extraction without the user pressing the stop button according to the juice extraction end, Through this, unnecessary motor driving can be prevented, and furthermore, the safety and efficiency of using the juicer can be secured.

In addition, after the juice is completed according to the forward rotation of the motor, the motor is rotated in the reverse direction for a certain period of time to facilitate the termination of the coupling state between the screw shaft and the motor shaft, so that the user can easily separate the drum housing coupled to the main body. , Through this, the convenience of use of the juicer can be greatly improved.

1 is a perspective view showing an example of juice juicers to which a control method and control system according to an embodiment of the present invention can be applied, FIG. 1A is a juice juicer to which a general type hopper is applied, and FIG. It is a juicer.
Figure 2 is an exploded perspective view of the body and the drum housing in Figure 1b.
Figure 3 is a cross-sectional view of Figure 1;
4 is an exploded perspective view of the drum housing shown in FIG. 2;
5 is a top view of the hopper showing the bottom surface of the hopper.
6 is a flowchart for performing an automatic shutdown function in the method for controlling a juicer according to an embodiment of the present invention.
7 and 8 are diagrams showing examples of a load measurement method that can be applied to the juicer control method and system according to the present invention. This is a graph of the test result of measuring the load of cherry tomatoes, which is a soft juice material.
9 is a block diagram of a juicer control system according to an embodiment of the present invention.
10 is a flowchart illustrating a function of facilitating attachment and detachment of a drum housing in the method for controlling a juicer according to the present invention.

Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by exemplary embodiments. The same reference numerals presented in each figure indicate members performing substantially the same function.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

When it is said that a certain part "includes" a certain component throughout the specification, it means that it may further include other components without excluding other components unless otherwise stated.

1 is a perspective view showing examples of juicers to which a control method and system according to an embodiment of the present invention can be applied, FIG. 1a is a juicer to which a general type hopper is applied, and FIG. It is Ki. FIG. 2 is an exploded perspective view of the main body and the drum housing in FIG. 1B , FIG. 3 is a cross-sectional view of FIG. 1B , and FIG. 4 is an exploded perspective view of the drum housing shown in FIG. 2 .

The juicer according to an embodiment of the present invention can be largely divided into a main body 100 and a drum housing 200.

The main body 100 seats and fixes the drum housing 200, receives external power from the power cable 102 connected to the lower end of the main body 100, and rotates the internal motor 1001 to rotate the drum housing 200. A driving force for rotating the constituting screw 230 is provided.

As shown in FIG. 4, the drum housing 200 may include a hopper 210, a juice drum 280, a juice separation drum 260, and a screw 230.

The drum housing 200 is the upper part of the juice drum 280 in a state in which the juice separation drum 260 and the screw 230 composed of the inner module 240 and the outer module 250 are mounted inside the juice drum 280 The assembly is completed by fastening the hopper 210 to the.

In this way, in a state in which the lower juice drum 280 and the upper hopper 210 are fastened, the drum housing 200 can be seated on the main body 100, and the drive shaft 130 protrudes from the bottom surface of the main body 100. ) and receives power from it. That is, by receiving the rotational force of the driving shaft 130, the screw 230 inside the juice drum 280 and the cutting part 225 inside the hopper 210 are rotated to cut and compress the input juice material to produce juice. The juice and residue are separated and discharged.

5 is a top view of the hopper showing the bottom surface of the hopper of FIG. 1B.

As shown in Figure 2, the hopper 210 is detachably coupled to the top of the juice drum 280. In general, the hopper forms a space for storing the input juice materials (eg, fruits, vegetables, grains, etc.). As shown in FIG. A general-type hopper, as shown in FIG. 1B, can be implemented as a large-capacity hopper that is formed in a tubular shape and has a hopper lid so that large-sized materials can be injected at once. The control method and system according to the present invention apply a general-type hopper This technology can be applied to both a juicer and a juicer with a large-capacity hopper.

Referring again to FIG. 5, FIG. 5 shows, for example, the bottom of the large-capacity hopper 210 of FIG. It receives power from and rotates to cut and stir the juice material and supply it to the juice drum 280 at the bottom. Therefore, in the present invention, since the cutting of the juice material is performed in the hopper 210, there is no need to pre-cut and introduce the juice material.

The hopper 210 can be largely divided into a hopper housing 215 and a lid portion 220, and a cutting portion 225 can be mounted inside the hopper 210, so it will be referred to as the hopper 210 including the cutting portion 225. may be The hopper housing 215 has a cylindrical shape or a truncated cone shape and forms a space for receiving juice material through an open top.

As shown in FIG. 5 , the width of the discharge hole 217 may gradually widen along the rotational direction of the cutting part 225 . Therefore, soft juice material or small pulverized juice material is immediately introduced into the screw 230 through the narrow portion that is the front end of the discharge hole 217 in the rotational direction, and hard juice material or relatively large pulverized juice The material can be further crushed by the cutting part 225 to stay inside the hopper 210 and discharged through the wide part at the rear end of the discharge hole 217 in the rotational direction. In the drawing, one discharge hole 217 is formed on one side of the bottom surface of the hopper 210. The larger the number of discharge holes 217 or the size of the area of the discharge hole 217, the greater the amount (or size) It is possible to supply the juice material of the juice drum 280. However, if too much juice material is supplied into the juice drum 280, the load may be applied to the screw 230, so the size and size of the discharge hole 217 so that an appropriate amount and size of juice material can be supplied. It is desirable to set the number.

The present invention focuses on the fact that the load applied to the screw and/or the motor may vary when juicing soft juice materials and hard juice materials, and measures the current change according to the material juice (load) in real time to extract juice when the change is within a certain range. The main point is to automatically stop by detecting that there is no material (juice completion).

At this time, since there is a risk of misjudgment when determining and judging an absolute reference current value due to various individual factors such as motor deviation, circuit board deviation, drum housing parts deviation, and input power fluctuation, there is a risk of misjudgment. For example, by real-time comparison and judgment with the change value of the current measurement value 1 second before, it is accurately determined whether the juice is finished (material not input).

A juicer control system according to the present invention includes a motor that is essentially operated in forward or reverse rotation; Load measurement unit for measuring the load of the motor; and a first step of determining whether to enter the second step based on the first load change value of the motor based on the measurement result from the load measurer. and a control unit performing a second step of determining whether or not juice extraction is terminated based on a second load measurement change value of the motor and a timer based on a measurement result from the load measurement unit.

9 is a configuration diagram of a juicer control system according to an embodiment of the present invention, as a load measuring unit, measured by a current sensing unit 40 and a current sensing unit 40 that measure the amount of current according to material juice in real time and a control unit 30 that receives the amount of current and determines whether or not to end juice extraction, and a motor unit 20 that drives forward or reverse rotation according to a control signal from the control unit 30. At this time, the power supply unit 10 to which commercial power is supplied supplies power to the control unit 30 and the motor unit 20, respectively, and the current sensing unit 40 is used to sense the amount of current supplied to the motor.

The method of receiving the amount of current measured in real time by the current sensing unit 40 and deriving the load change value is: 1) For example, the (current) current value input from the CT (Current Trans) sensing circuit installed in the current sensing unit is read in real time, for example, the difference from the past current value before 1 second is calculated as a change value (ie, the first load change value), or 2), for example, a CT (Current Trans ) The maximum current value input from the sensing circuit can be stored in real time and the difference from the current current value can be calculated as a change value (that is, an additional load change value).

The control unit (MICOM, 30) receives the amount of current measured by the current sensing unit 40 and determines whether the juice is terminated. For example, it receives the current value input from the CT (Current Trans) sensing circuit in real time and The difference between the previous current value and the current current value is calculated as a change amount, and when the change amount is within a certain range, it is determined that there is no juice material (juice extraction complete), and an automatic stop signal is transmitted to the motor unit 20.

In the embodiment of the present invention, the motor unit 20 uses an AC motor, but is not limited thereto and can be implemented with various motors such as AC, BLDC, and DC motors.

In addition, the control unit 30 stores, for example, the highest current value input from the CT detection circuit in real time, calculates the amount of change in the difference between the current measurement value and the highest current value, and calculates the amount of material not input or soft juice material at the initial start. The input is also made to be automatically terminated according to the present invention.

A more detailed and specific control method in the controller 30 will be described with reference to FIGS. 6 to 9 .

6 is a flowchart for performing an automatic shutdown function in a method for controlling a juicer according to an embodiment of the present invention. When juice is started (S100), the amount of current change as a current value measured through a current detection unit (CT current detection) After calculating (S300) and storing the highest current value in real time (S310), the current current value and the past current value before a predetermined time are compared, and if the change amount is less than the set range (ie, the first reference value), the second step If it is not entered and it is determined that the juice is finished in the first step and is greater than the set range (ie, the first reference value), it is determined that the juice is in progress and proceeds to the second step.

At this time, as mentioned above, due to non-injection of material or input of soft juice material at the initial start, the change amount is smaller than the set range by comparing the current current value with the past current value before a predetermined time, so that the juice is extracted in the first step. There is a possibility that it will be judged as an end. In preparation for this case, alternatively or additionally, if the change amount is continuously greater than the set range (ie, the third reference value) for (a predetermined time, for example, 2 seconds) by comparing the current current value and the highest current value ( S400), it may be configured to proceed with juice extraction for a predetermined time (eg, 1 minute) (S410) and end.

After entering the second step, the current change amount is calculated with the current value measured through the current sensing unit (CT current sensing) while operating the timer (S500), and the current current value is compared with the past current value before a predetermined time (S600). ) When the change amount is greater than the set range (ie, the second reference value), the timer is initialized to continuously juice (S610), and when the change amount is smaller than the set range (ie, the second reference value), a predetermined time period is set in advance If the amount of change is less than the set range for a predetermined time (eg, 30 seconds), it is judged as the final juice completion state when the timer ends (S800), and the controller (MICOM) transmits a drive stop signal to the motor unit. do.

6 to 10, timer-based predetermined times such as 1 second, 2 seconds, 30 seconds, and 1 minute, and various reference values such as 6 and 10, which are the same or different, are the same as the user's needs. It is a value that can be changed as much as possible according to , and can also be changed as much as possible according to the AD conversion method of MICOM.

For example, Table 1 below is an example showing the measured and calculated microcomputer AD conversion values and maximum current values during juice extraction for various juice materials.

experimental conditions MICOM AD conversion value Maximum use current (A) no load 104 0.742 carrot juice 223 1.415 Cherry Tomato Juice 110 0.761 apple juice 121 0.852 pear juice 127 0.876 orange juice 112 0.783 grape juice 119 0.838 water parsley juice 129 0.957 freshly squeezed juice 134 1.112 Cabbage juice 158 1.549

As such, when the hard juice material (for example, carrot in the experimental example of FIG. In the experimental example of 8, when extracting cherry tomatoes), the change width was fine with at least 6 or more (see FIG. 8).

Here, FIGS. 7 and 8 are graphs of load measurement experiment results obtained in an experiment performed by periodically putting juice material into the hopper using a general type hopper, represented by a current value according to time, and also in an experiment using a large capacity hopper. Of course, similar result graphs can be obtained. However, in the case of a large-capacity hopper, the hard juice material or the relatively large crushed juice material stays inside the hopper and is additionally cut by the cutting part so that the juice proceeds. As a result, the frequency of current change may increase.

Therefore, according to this experimental example, it can be seen that it is necessary to set the microcomputer AD change value to 6 or more as the reference value in order to sense the current change amount without malfunction. However, this reference value (here, 6) may vary depending on the input voltage, motor specifications, juice extraction method, and the like. For example, in the case of slowly introducing soft juice materials one by one, the reference value may be lowered.

In addition, at this time, the microcomputer AD conversion value was sampled 60 times at a 2 ms period to prevent malfunction, and the cumulative average value was calculated, and when a change width of 6 or more was detected 10 times at a 100 ms period, the second step was performed (determined as a hard juice material). . However, these cycles and/or the number of times may vary depending on the input voltage, motor specifications, juice extraction method, and the like.

Additionally, since the microcomputer AD conversion value continues to rise due to the increase in starting current when the juicer is initially started, it is preferable to provide a stabilization step for a predetermined time, for example, 5 seconds after the initial start. In other words, it is stable to start the first stage after a predetermined time elapses after the motor is operated. For example, when the power of the motor is turned on manually or automatically, after a predetermined time, for example, after 0.4 seconds, the forward rotation signal of the motor unit is input, and after 5 seconds from this, the load measurement unit and / or the control unit measure and / or The control method of the present invention is performed while reading or storing the calculated results.

In the juicer control system according to the present invention, the method of transmitting the motor drive stop signal of the control unit can be largely seen in two ways. First, there is a manual stop input method in which a control unit transmits a driving stop signal to the motor unit when an input signal is generated by the user. Second, there is an automatic stop input method according to the determination of the current change amount measured in real time by the current sensing unit (CT current sensing).

In the embodiment of the present invention, the control unit 50 is implemented as a TACT button, but is not limited thereto and can be designed with various buttons.

Both the manual stop input and the automatic stop input stop after the motor rotates forward for juice extraction. In this case, the screw shaft is caught in the motor shaft and the drum housing is difficult to attach and detach.

Therefore, in the juicer control method according to the present invention, when a manual stop input or an automatic stop input is generated according to the end of juice extraction, the controller (MICOM) transmits a random stop or automatic stop signal to the motor unit, and then reverses for a certain period of time. signal is transmitted, and then the final motor stop signal is transmitted.

10 is a flowchart illustrating a function of facilitating attachment and detachment of a drum housing in the method for controlling a juicer according to the present invention, after juice is performed by forward rotation of the motor unit according to the start of juice extraction (S100') (S200') , When a manual stop input or an automatic stop input occurs, the control unit MICOM transmits a random stop or automatic stop signal to the motor unit to stop the motor (S800'), and then transmits a reverse rotation signal to the motor unit (S810). After the set time (here, 1 second) has elapsed (S820), the final juice is finished (S830).

Such reverse rotation of the motor can prevent jamming between the screw shaft and the motor shaft, and the drum housing can be easily separated from the main body.

In the embodiment of the present invention, the motor reverse rotation setting time is set to 1 second, but is not limited thereto, and the setting time can be changed.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. Anyone with ordinary knowledge in the art to which the invention pertains without departing from the subject matter of the invention claimed in the claims is considered to be within the scope of the claims of the present invention to various extents that can be modified.

Claims (14)

In the juicer control method for controlling the automatic shutdown of the juicer in which juice is performed by forward rotation of the motor,
A first step of determining whether to enter the second step based on the first load change value of the motor; and
A second step of determining whether to end juice based on the second load change value of the motor and the timer,
How to control a juicer. According to claim 1,
The first load change value of the motor is based on the difference between the current current value of the motor and the past current value before the first time, and the second load change value of the motor is based on the current value of the motor and the second current value of the motor. Based on the difference from the past current value before the time, wherein the first time and the second time may be the same or different,
Each of the first step and the second step is determined by comparing the first load change value of the motor and the second load change value of the motor with a first reference value and a second reference value, which may be the same or different from each other, respectively. characterized in that,
How to control a juicer. According to claim 2,
In the second step, the timer is operated when the second step is entered, and the timer is initialized when the second load change value exceeds the second reference value as a result of comparison between the second load change value and the second reference value. And if the second hatching change value does not exceed the second reference value, it is characterized in that it is determined that the juice is finished when the timer expires.
How to control a juicer. According to claim 3,
The first step further includes determining whether to enter the second step based on an additional load change value, wherein the additional load change value is a difference between the current current value of the motor and the measured maximum current value. based on,
Characterized in that the first step is determined by comparing the additional load change value with a third reference value,
How to control a juicer. According to any one of claims 1 to 4,
The first step further includes determining whether juice extraction is terminated based on an additional timer when it is determined that the second step is not entered,
The reference values of the timer and the additional timer are different,
How to control a juicer. According to claim 5,
Characterized in that the first step starts after a predetermined time elapses after the motor is operated,
How to control a juicer. According to claim 6,
If it is determined that the juice is finished, further comprising the step of rotating the motor in reverse for a predetermined time after the second step,
How to control a juicer. In the juicer control system for controlling the automatic termination of the juicer in which juice is performed by forward rotation of the motor,
A motor operated in forward or reverse rotation;
a load measurement unit for measuring a load of the motor; and
a first step of determining whether to enter a second step based on a first load change value of the motor based on a measurement result from the load measurer; And a control unit for performing a second step of determining whether to end juice based on a second load measurement change value of the motor and a timer based on the measurement result from the load measurement unit,
Juicer control system. According to claim 8,
The first load change value of the motor is based on the difference between the current current value of the motor and the past current value before the first time, and the second load change value of the motor is based on the current value of the motor and the second current value of the motor. Based on the difference from the past current value before the time, wherein the first time and the second time may be the same or different,
Each of the first step and the second step is determined by comparing the first load change value of the motor and the second load change value of the motor with a first reference value and a second reference value, which may be the same or different from each other, respectively. characterized in that,
Juicer control system. According to claim 9,
In the second step, the timer is operated when the second step is entered, and the timer is initialized when the second load change value exceeds the second reference value as a result of comparison between the second load change value and the second reference value. And if the second hatching change value does not exceed the second reference value, it is characterized in that it is determined that the juice is finished when the timer expires.
Juicer control system. According to claim 10,
The first step further includes determining whether to enter the second step based on an additional load change value based on a measurement result from the load measurer, wherein the additional load change value is the current current value of the motor. Based on the difference between and the highest measured current value,
Characterized in that the first step is determined by comparing the additional load change value with a third reference value,
Juicer control system. According to any one of claims 8 to 11,
The first step further includes determining whether juice extraction is terminated based on an additional timer when it is determined that the second step is not entered,
The reference values of the timer and the additional timer are different,
Juicer control system. According to claim 12,
Characterized in that the first step starts after a predetermined time elapses after the motor is operated,
Juicer control system. According to claim 13,
If it is determined that the juice is finished, further comprising the step of rotating the motor in reverse for a predetermined time after the second step,
Juicer control system.

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