Patent Publication Number: US-2022218155-A1

Title: Method for distinguishing container body of blender, and blender

Description:
TECHNICAL FIELD 
     The present disclosure relates to a method for distinguishing a container body of a blender, and to the blender. 
     BACKGROUND ART 
     In general, a blender is a home appliance used to finely chop or crush food contained in a container body with a rotating blade powered by a motor, and is commonly referred to as a mixer. 
     A blender has a container body seated on the upper surface of a main body, and when the container body is seated, a blade inside the container body is connected to a rotating shaft of a motor and becomes rotatable. 
     A user may put food into the container body through the opening of the container body, close a container lid, and operate the main body to drive the motor, rotate the blade, and crush the food. 
     Recently, a blender whose multiple containers with different purposes can be used in one main body and whose main body operates according to the purpose of each container body is being developed. 
     In other words, a blender that provides multiple containers distinguished based on food ingredients or purpose of use, and that allows a user to choose and use a container body corresponding to the purpose by placing it on one main body is under development. 
     However, the main body of the blender may not recognize which type of a container body is seated when a user places different types of containers on the main body, so the user himself or herself has to distinguish the container body and enter the type of the container body, which is troublesome. 
     In the same context, there is a problem that the main body of the blender may not decide which mode of operation should be operated in since the main body cannot recognize the container body being seated, and the user himself or herself has to enter the operation mode suitable for the type of the container. 
     For that reason, technological development is required in the field for a blender that allows a user to selectively use multiple containers with one main body and distinguishes the container body being seated on the main body. 
     DISCLOSURE 
     Technical Problem 
     An objective of the present disclosure is to provide a method for distinguishing a container body of a blender and the blender, which enables a user to selectively use multiple containers in one main body, and with which the container body being seated on the main body can be distinguished. 
     Another objective of the present disclosure is to provide a method for distinguishing a container body of a blender and the blender, with which the container body being seated on the main body can be distinguished and thereby making the main body to operate in an operation mode suitable for the purpose of the container body. 
     Another objective of the present disclosure is to provide a method for distinguishing a container body of a blender and the blender, of which the first induction coil is arranged on the main body and the second induction coil is arranged on the container body, and with which the container body being seated on the main body can be distinguished by the power generated via inductive coupling between the first and second induction coils. 
     Another objective of the present disclosure is to provide a method for distinguishing a container body of a blender and the blender, which makes it possible to accurately distinguish a container body with low power. 
     Objectives of the present disclosure are not limited to the above-mentioned objectives and other unmentioned objectives can be clearly understood from the following description by a person skilled in the art to which the present disclosure pertains. 
     Technical Solution 
     According to an embodiment, a blender has arranged at the lower part of a container body a light source module for transmitting a light signal, and has arranged at the upper part of a main body a light reception module for receiving the light signal such that, when the container body is seated on the main body, the light source module transmits the light signal corresponding to the container body and the main body may distinguish the container body by using the light signal received by the light reception module. 
     According to another embodiment, the first induction coil is arranged at the upper part of the main body and the second induction coil is arranged at the lower part of the container body, and when the container body is seated on the main body, a voltage induced in the second induction coil via inductive coupling between the first and second induction coils is supplied to the light source module, enabling transmission of the light signal. 
     According to yet another embodiment, in a blender of which multiple containers may be used in one main body interchangeably, a frequency of a light signal is set differently for each container body, and when a container body is seated on the main body, the main body may distinguish the container body by reading the frequency of the received light signal. 
     To this end, a light source module of the container body, according to yet another embodiment, may modulate the frequency of the light signal corresponding to the container body, turn the light on and off according to the modulated frequency, and transmit the light signal, while the main body may distinguish the container body corresponding to the frequency upon receiving the light signal. 
     According to yet another embodiment, a seating detection part provided on the main body may detect a magnet attached to the container body, thereby detecting that the container body is seated. 
     According to yet another embodiment, when the container body is seated on the main body, the first induction coil arranged at the upper part of the main body and the second induction coil arranged at the lower part of the container body are placed parallel to each other with the same center point, making inductive coupling between the first and second induction coils effective. 
     According to yet another embodiment, the light source module includes a light source to emit light and the light reception module includes a semiconductor sensor to receive the light emitted from the light source, facilitating smooth transmission and reception of the light signal. 
     According to yet another embodiment, when the container body on the main body is distinguished by the light signal, the main body operates in an operation mode corresponding to the container body, meaning the desired action is automatically executed without user input of the operation mode. 
     Advantageous Effects 
     The method for distinguishing a container body of a blender, and the blender, according to embodiments of the present disclosure, have advantages described below. 
     According to one embodiment of the present disclosure, a user can avoid the trouble of distinguishing and entering the type and purpose of a container body since a main body may automatically distinguish the container body seated on the main body. 
     According to another embodiment of the present disclosure, a user can avoid the trouble of selecting operation mode of the main body according to the purpose of a seated container body since the main body can automatically distinguish the container body seated on the main body. 
     According to a further embodiment of the present disclosure, when the container body is seated on the main body, a light signal is transmitted to distinguish the type of the container body by using the power generated via inductive coupling between an induction coil arranged on the main body and an induction coil arranged on the container body, thus, it is able to distinguish the container body with low power. 
     According to still another embodiment of the present disclosure, when the container body is seated on the main body, a light signal is transmitted from the container body and received by the main body, enabling the main body to automatically distinguish the container body with this simple process. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exterior perspective view of a blender according to embodiments of the disclosure. 
         FIG. 2  is an elevational view of the blender. 
         FIG. 3  is a partial sectional view illustrating a part of blender configuration according to an embodiment of the disclosure. 
         FIG. 4  is a bottom view of a container body and a top view of a main body of the blender of  FIG. 3 . 
         FIG. 5  is a partial sectional view illustrating a part of blender configuration according to another embodiment of the disclosure. 
         FIG. 6  is a bottom view of a container body and a top view of a main body of the blender of  FIG. 5 . 
         FIG. 7  is an equivalent circuit diagram of the blender according to embodiments of the disclosure. 
         FIG. 8  is a block diagram of a light source module according to embodiments of the disclosure. 
         FIG. 9  is a view illustrating a frequency modulation of a light signal in the light source module. 
         FIG. 10  is a flowchart illustrating the process by which a main body distinguishes a container body according to an embodiment of the disclosure. 
         FIG. 11  is a flowchart illustrating the process by which a main body distinguishes a container body according to another embodiment of the disclosure. 
     
    
    
     MODE FOR INVENTION 
     Advantages and features of the present disclosure and a method of achieving the same should become clear with embodiments described in detail below with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be realized in various other forms. The present embodiments make the disclosure complete and are provided to completely inform a person skilled in the art to which the present disclosure pertains of the scope of the disclosure. The present disclosure is defined only by the scope of the claims. Like reference numerals refer to like elements throughout. 
     Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is an exterior perspective view of a blender according to embodiments of the disclosure, and  FIG. 2  is an elevational view of the blender. 
     Referring to  FIGS. 1 and 2 , the blender  1  according to embodiments of the disclosure may be configured to include a main body  30  placed on the floor and a container body  10  seated on top of the main body  30 . 
     Inside the main body  30 , a number of electrical devices and components including a motor and a control PCB module to operate the blender  1  may be arranged. 
     In the main body  30 , a manipulation part  40 ,  310   b  to manipulate the operation of the blender  1  and an indication part  310   a  to indicate the operation status of the blender  1  may be provided. 
     The main body  30  may be formed in a hexahedral shape as a whole, and on the top a seating part  301  may be formed for the container body  10  to be seated. The seating part  301  may be configured for the container body  10  to be detachable in the vertical direction. 
     The exterior of the main body  30  may be formed by a case  31  made of metal materials or materials having a metallic texture, and the case  31  may be formed in a hexahedral shape with an open bottom. 
     Inside the case  31 , a space may be provided for mounting a motor (see  FIGS. 3 and 51  of  FIG. 5 ) and a control PCB module, etc. 
     On the front side of the main body  30 , a knob  40  may be provided for a user to set the operation of the blender  1 . The knob  40  is configured to protrude from the front side of the main body  30 , and actions of the blender  1  may be manipulated and set by a rotating operation of the knob  40 . 
     On the upper surface of the main body  30 , the indication part  310   a  may be provided to indicate the operation status of the blender  1 . The indication part  310   a  may include at least one display device. 
     On the upper surface of the main body  30 , the manipulation part  40 ,  310   b  may be provided to manipulate starting and stopping actions of the blender  1 . To manipulate the blender  1 , the manipulation part  40 ,  310   b  may include, for example, at least one of the knob  40  and a touch module (not shown). 
     On the upper surface of the main body  30 , the seating part  301  may be formed. The seating part  301  may protrude from the upper side of the main body  30 , and a part of the seating part  301  may be inserted into the lower surface of the container body  10  to securely support the container body  10 . 
     When the container body  10  is seated in the seating part  301 , a motor  51  inside the main body  30  and a blade module  14  inside the container body  10  are joined to each other, then a rotational force may be transmitted from the motor  51  to the blade module  14 . 
     The exterior of the seating part  301  may be formed of the same material as the case  31 . For example, the seating part  301  may be formed of metal materials or materials having a metallic texture to have a sense of unity with the exterior of the main body  30 . 
     The motor  51  is for rotation of the blade module installed inside the container body  10 , that is, the blade module  14  may be rotated at high speed by driving of the motor  51 . 
     The rotation speed of the motor  51  may be controlled by the operation of the knob  40 , which makes it possible to adjust the rotation speed of the blade module  14 . 
     At the top of the container body  10  a pouring lip  15  to pour out crushed food may protrude, and on one side facing the pouring lip  15 , a handle  13  may be formed to protrude. 
     The handle  13  protrudes outward from the top of the container body  10  and extends downward, allowing a user may lift or move the container body  10 . The protruding end of the handle  13  may be located on the same line with the side end of the main body  30 . 
     On the upper surface of the container body  10 , a lid  20  may be inserted or removed. A user may grab a lid handle  21  to insert the lid  20  in or remove the lid  20  from the container body  10 , thereby opening and closing an upper-surface opening of the container body  10 . 
     By closing (this is called “the closure of a container lid”) or opening (this is called “the opening of a container lid”) the upper-surface opening of the container body  10  with the lid  20 , the upper-surface opening of the container body  10  may be covered and opened. 
       FIG. 3  is a partial sectional view illustrating a part of blender configuration according to an embodiment of the disclosure, and  FIG. 4  is a bottom view of a container body and a top view of a main body of the blender of  FIG. 3 . 
     Referring to  FIGS. 3 and 4 , in the blender  1  of the embodiment, the first induction coil  101  may be installed at the upper part of the main body  30 . The first induction coil  101  may be embodied in a form in which a conductor is wound spirally multiple times on the same plane. 
     The first induction coil  101 , according to the embodiment, may be disposed in a form in which a conductor is spirally wound multiple times around a motor-side connection part  302  at the upper central part of the main body  30 , in a ring shape as a whole. 
     At the upper part of the main body  30 , a light reception module  102  for receiving a light signal transmitted from outside may be installed. The light reception module  102  may be arranged to be exposed to the outside to receive the light signal. The light reception module  102  may be protected by a cover member (not shown) made of a light-transmitting material. 
     The main body  30  may include a power supply part  103  inside. The power supply part  103  may apply current to the first induction coil  101 . When the current is applied to the first induction coil  101 , a magnetic field may be created in the first induction coil  101 . 
     The power supply part  103  may change the strength of the current applied to the first induction coil  101 , and by the change of the current strength, the magnetic field may be changed in the first induction coil  101 . The power supply part  103  may be mounted on a PCB substrate (not shown). 
     The main body  30  may include a controller  104  inside. The controller  104  may be connected to the motor  51  which is for rotating the blade module  14 . 
     The controller  104  may drive the motor  51  when a light signal is received by the light reception module  102 . The controller  104  may be mounted on a PCB substrate. 
     In addition, the controller  104  may distinguish the container body  10  seated on the main body  30  by analyzing the light signal received by the light reception module  102 , and may drive the motor  51  in an operation mode corresponding to the container body  10 . Here, distinguishing the container body  10  may mean to distinguish the type suitable for the purpose of the container body  10 , thus the rotation speed of the motor  51  may be adjusted according to the purpose of the container body  10 . 
     At the lower part of the container body  10 , the second induction coil  201  may be installed. The second induction coil  201  may be arranged in a form in which a conductor is wound spirally multiple times on the same plane. 
     The first induction coil  101 , according to the embodiment, may be disposed in a form in which a conductor is spirally wound multiple times in an outer part around a blade-side connection part  142  at the lower central part of the container body  10 , in a ring shape as a whole. 
     At the lower part of the container body  10 , the light source module  202  for receiving a light signal may be installed. The light source module  202  may be arranged to be exposed to the outside to transmit the light signal. The light source module  202  may be protected by a cover member (not shown) made of a light-transmitting material. 
     As in the illustrated embodiments, when the container body  10  is seated on the main body  30 , the first induction coil  101  in the main body  30  and the second induction coil  201  in the container body  10  may be arranged at predetermined intervals at positions corresponding to each other. 
     When the container body  10  is seated on the main body  30 , the first induction coil  101  and the second induction coil  201  may be respectively disposed to face and parallel to each other with the same center point. 
     The first induction coil  101  and the second induction coil  201  may be selectively inductively coupled under certain conditions. 
     When the strength of the current applied to the first induction coil  101  changes by the power supply part  103 , the magnetic field in the first induction coil  101  may be changed and magnetic flux passing through the second induction coil  201  may be changed by the inductive coupling between the first induction coil  101  and the second induction coil  201 , thus an induced electromotive force may be produced in the second induction coil  201 . 
     The induced electromotive force in the second induction coil  201  may be applied to the light source module  202 . The light source module  202  may transmit the light signal by using the power applied from the second induction coil  201 . The transmitted light signal may be received by the light reception module  102 . 
     The light source module  202  and the light reception module  102  may be arranged facing each other for smooth mutual transmission and reception of the light signal. 
     The light source module  202 , according to the embodiment, may include a light source that emits light, and the light reception module  102  may include a light sensor that detects the light emitted. The light source may include a light emitting diode (LED) and the light sensor may include a semiconductor sensor that can receive light. The semiconductor sensor may be implemented as, for example, a photodiode, a phototransistor, or the like. 
     Although not shown in the drawings, the main body  30  may have a seating detection module to detect whether the container body  10  is seated. The seating detection module may detect whether the container body  10  is seated by detecting a magnet installed in the lower part of the container body  10  when the container body  10  is seated on the main body  30 . 
     The seating detection module may include a reed switch, and when the magnet approaches the reed switch, the reed switch is turned on and detects the approach of the magnet, thereby detecting the seating of the container body  10 . 
     When a voltage is induced in the second induction coil  201 , the voltage may be applied to the light source module  202 . Here, a conversion module may be included to convert an alternating current (AC) voltage generated in the second induction coil  201  to a direct current (DC) voltage required by the light source module  202 . The conversion module will be explained in detail below. 
     The light source module  202  may modulate a frequency of a light signal and transmit the frequency-modulated light signal. The frequency modulation may be implemented differently for each container body  10 . 
     According to the embodiment, it is able to analyze the frequency-modulated light signal and distinguish the container body  10  corresponding to the light signal. 
     The conversion module may not be provided if the voltage generated in the second induction coil  201  can be used in the light source module  202  as it is. The conversion module may convert an AC voltage generated in the second induction coil  201  to a DC voltage required by the light source module  202  and supply the converted voltage. 
     Inside the main body  30 , the motor  51  may be provided. The upper end of the motor  51  may be connected to the blade module  14  inside the container body  10 . 
       FIG. 5  is a partial sectional view illustrating a part of blender configuration according to another embodiment of the disclosure, and  FIG. 6  is a bottom view of a container body and a top view of a main body of the blender of  FIG. 5 . 
     Referring to  FIGS. 5 and 6 , in the blender  1  of the embodiment, the first induction coil  101  may be installed at the upper part of the main body  30 . The first induction coil  101  may be embodied in a form in which a conductor coil is wound spirally multiple times on the same plane. 
     Unlike as in  FIGS. 3 and 4 , the first induction coil  101 , according to the embodiment, may be disposed in a form in which a conductor is spirally wound multiple times on one side of a motor-side connection part  302  at the upper central part of the main body  30 . The second induction coil  201  may be disposed in a form in which a conductor is spirally wound multiple times on one side of a blade-side connection part  142  at the lower central part of the container body  10 . 
     The first and second induction coils  101  and  201  may be arranged in a form in which their respective conductors are wound spirally multiple times on the same plane. 
     Also in the embodiment, the first induction coil  101  and the second induction coil  201  may be arranged at predetermined intervals to face each other. Preferably, the first induction coil  101  and the second induction coil  201  may be arranged in order for the inductive coupling between the two coils to be effective. 
     As for  FIGS. 5 and 6 , when compared to  FIGS. 3 and 4 , the only difference is the respective installation location of the first and second induction coils  101  and  201 , and the operation of the first induction coil  101 , the light reception module  102 , the power supply part  103 , and the controller  104  of the main body  30 , and the operation of the second induction coil  201  and the light source module  202  are the same. Therefore, redundant explanations are omitted. 
       FIG. 7  is an equivalent circuit diagram of the blender according to embodiments of the disclosure. 
     Referring to  FIG. 7 , in the main body  30  of the blender  1  according to the embodiment, the first induction coil  101  may be connected to the power supply part  103  and the light reception module  102  may be connected to the controller  104  and the motor  51 . 
     The power supply part  103  supplies an alternating current to the first induction coil  101 , and a magnetic field may be generated around the first induction coil  101  by the supplied alternating current in the first induction coil  101 . 
     The power supply part  103  adjusts the intensity of the alternating current supplied to the first induction coil  101 , and thus may induce a change in the magnetic field of the first induction coil  101 . 
     In the container body  10  of the blender  1 , the second induction coil  201  may be connected to the light source module  202 . The conversion module  210  may be arranged between the second induction coil  201  and the light source module  202  as needed. 
     The operation in such an equivalent circuit diagram will be described. 
     The power supply part  103  may apply current to the first induction coil  101 , by this current application, a magnetic field may be generated around the first induction coil  101 . 
     The power supply part  103  may alter the size of the current applied to the first induction coil  101 , and by the alteration of the current size, the magnetic field may be changed. 
     When the container body  10  is seated on the upper part of the main body  30 , the first induction coil  101  in the main body  30  and the second induction coil  201  in the container body  10  may be placed corresponding to each other. 
     Here, inductive coupling between the first and second induction coils  101  and  201  occurs, and a voltage may be induced in the second induction coil  201  by the magnetic field generated in the first induction coil  101 . 
     The voltage induced in the second induction coil  201  may be applied to the conversion module  210 . The conversion module  210  may convert a voltage induced in the second induction coil  201  to a voltage required by the light source module  202  at the rear end, and output the converted voltage. 
     The voltage induced in the second induction coil  201  is an AC voltage, so the conversion module  210  may convert this to a DC voltage and output the converted DC voltage. Also, the conversion module  210  may adjust the magnitude of a voltage from the DC voltage converted to the DC voltage required for the light source of the light source module  202 . 
     When the light source module  202  transmits a light signal, the light reception module  102  in the main body  30  may receive the light signal. 
     The controller  104  may analyze the light signal received by the light reception module  102  and distinguish the container body  10  seated on the main body  30  as described above, meaning it may distinguish the purpose or type of the container body  10 . 
     To this end, the light signal output from the light source module  202  may be set to be distinguished for each container body  10 . Thus, the light signal received by the light reception module  102  may be used to distinguish the container body  10 . 
     On the other hand, as described above, the power supply part  103  may apply current to the first induction coil  101  before the container body  10  is seated on the main body  30 . The power supply part  103 , however, may apply current to the first induction coil  101  after the container body  10  is seated on the main body  30 . 
     In addition, the conversion module  210  may be provided optionally as needed. The conversion module  210  may not be provided if the light source module  202  generates a light signal using the induced voltage in the second induction coil  201 . 
     In the embodiment, the voltage induced in the second induction coil  201  is an AC voltage and the voltage required by the light source module  202  is a DC voltage, so the conversion module  210  may be provided to convert the AC voltage to the DC voltage and adjust the magnitude of a voltage. 
       FIG. 8  is a block diagram of a light source module according to embodiments of the disclosure, and  FIG. 9  illustrates a frequency modulation of a light signal in the light source module. 
     The light source module  202  according to the embodiment may include a modulator  2021 , a driver  2022 , and a light source  2023 . 
     The light source  2023  may emit light. In the embodiment, the light source  2023  may include a light emitting diode (LED), especially an infrared LED. 
     The on-and-off state of the light source  2023  may be controlled by the driver  2022 . When the light source  2023  is in an on state it keeps emitting light, and when the light source  2023  is in an off state it may be turned off without emitting light. 
     When, by the driver  2022 , an on-and-off action is repeated or the action occurs with a constant duty ratio, the light source  2023  may emit and be turned off repeatedly according to the on-and-off action. 
     The light emitted from the light source  2023  may form a specific light signal according to the frequency being turned on and off. 
     The modulator  2021  may modulate the frequency of a light signal. This modulation of the frequency of the light signal determines the cycle to turn on and off the light emission. 
       FIG. 9 , for example, illustrates time at which light is turned on and off in the modulator  2021 . The frequency of the light signal may be adjusted by adjusting the time at which light is turned on and off. The modulation of the frequency of the light signal may be determined depending on the container body  10 . 
     When the frequency of the light signal is determined in the modulator  2021 , the driver  2022  may control on and off of the light source  2023  according to the frequency of the light signal. The light source  2023  may emit light by this on-and-off control. 
     Accordingly, the light reception module  102  may receive the light emitted at a constant frequency from the light source  2023 , and the controller  104  may analyze the received light signal, read the frequency of the light signal, and distinguish the container body  10 . 
       FIG. 10  is a flowchart illustrating the process by which a main body distinguishes a container body according to an embodiment of the disclosure. 
     Referring to  FIG. 10 , the container body  10  may be seated on the main body  30  in the embodiment. 
     A seating detection module (not shown) for detecting the seating of the container body  10  on the main body  30  may be arranged in the main body  30 . 
     The seating detection module may detect the magnet attached to the container body  10 , so when the container body  10  is seated on the main body  30 , the seating detection module may detect the seating of the container body  10  by detecting the magnet and. [S 101 : seating of container body] 
     The power supply part  103  may apply a voltage to the first induction coil  101  when the magnet attached to the container body  10  is detected, and may apply an alternating current to the first induction coil  101 . The power supply part  103  may also change the magnitude of the current applied to the first induction coil  101 . 
     When an alternating current is applied to the first induction coil  101  or the magnitude of the current is changed, a magnetic field may be generated around the first induction coil  101 . [S 103 : apply current to the first induction coil] 
     The magnetic field created in the first induction coil  101  may affect the second induction coil  201 . With this magnetic field, inductive coupling between the first and second induction coils  101 ,  201  may occur. [S 105 : occurring of inductive coupling] 
     By the inductive coupling, a voltage may be induced in the second induction coil  201 . In other words, an induced electromotive force may be generated in the second induction coil  201 . [S 107 : induce voltage in the second induction coil] 
     The voltage induced in the second induction coil  201  may be supplied to the light source module  202 . The light source module  202  does not operate until the voltage is supplied, and it may operate when the voltage is supplied. 
     When the voltage is supplied to the light source module  202 , the light source  2023  inside may transmit a light signal. The light signal may emit light, but this may happen according to the set on and off. 
     The light signal, in the embodiment, may be set differently for each container body  10 . That is, a specific light signal is set for each container body  10  so that the container body  10  may be distinguished by using the light signal. [S 109 : supply voltage to light source module] 
     When a light signal is transmitted from the light source  2023  of the light source module  202  installed in the lower part of the container body  10 , the light reception module  102  installed in the upper part of the main body  30  may receive the light signal. 
     When the container body  10  is seated on the main body  30 , the light source module  202  and the light reception module  102  may be placed corresponding to each other. [S 113 : receive light signal by light reception module] 
     The light reception module  102  may transmit the light signal received from the light source module  202  to the controller  104 . The controller  104  may analyze the received light signal. 
     Since different light signals are set for each container body  10 , the container body  10  may be distinguished by analyzing the light signal. [S 115 : analyze light signal] 
     Therefore, the controller  104  may distinguish the container body  10  by using the light signal analysis. [S 117 : distinguish container body] 
     Further, the controller  104  may drive the motor in an operation mode suitable for the distinguished container body  10 . 
       FIG. 11  is a flowchart illustrating the process by which a main body distinguishes a container body according to another embodiment of the disclosure. 
     Referring to  FIG. 11 , when the first induction coil  101  of the main body  30  and the second induction coil  201  of the container body  10  are inductively coupled, according to the embodiment, a voltage may be induced in the second induction coil  201 . 
     The voltage induced in the second induction coil  201  may be applied to the light source module  102 . The light source module  102  may be operated by the applied voltage. [S 201 : apply voltage to light source module] 
     When the voltage is applied to the light source module  102 , the modulator  2021  of the light source module  102  may modulate the frequency of the light signal. The modulation of the frequency of the light signal may include the process of determining the on-and-off period of light. 
     This is to determine the period of time for turning on or off the light emitted from the light source  2023 , which is to adjust the frequency of the light signal. 
     The modulation of the frequency is to prevent other light from acting as noise on the light signal generated from the light source  2023  when light is used for other purposes in the blender  1 . 
     In other words, the light signal is modulated with a specific frequency for each container body  10 , then by emitting light according to the frequency, it is able to distinguish the container body  10  according to the frequency while at the same time to be distinguished from the noise. [S 203 : modulate frequency of light signal] 
     The driver  2022  of the light source module  202  may turn on and off the light source  2023  according to the modulated frequency. Thus the light source  2023  may emit light by this on-and-off control, and the light source module  202  may transmit the frequency-modulated light signal to the outside. [S 205 : transmit light signal] 
     When the light source module  202  transmits a light signal, the light reception module  102  in the main body  30  may receive the light signal. The light source module  202  and the light reception module  102  may be placed corresponding to each other. 
     The light reception module  102  is a device to receive a light signal and may include, for example, a semiconductor sensor. The semiconductor sensor may be implemented as, for example, a photodiode, a phototransistor, or the like. [S 207 : receive light signal] 
     The light signal received by the light reception module  102  may be transmitted to the controller  104 . The controller  104  may analyze the received light signal. In this light signal analysis, the frequency of the light signal may be read. [S 209 : analyze light signal] 
     The frequency of the light signal is set for each container body  10 , thus, it is able to distinguish the container body  10  by checking the frequency of the light signal. The controller  104 , therefore, may distinguish the container body  10  by using the read frequency. [S 211 : distinguish container body] 
     When the container body  10  is distinguished, the main body  30  may operate in the operation mode suitable for the purpose of the container body  10 . 
     Meanwhile, in the embodiment, the frequency of the light signal may be modulated so that the light continues to emit. In other words, the frequency may be modulated so that the light stays on instead of repeating on and off periodically. 
     Exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, but the present disclosure is not limited to the exemplary embodiments and may be prepared in various forms, and it will be understood by a person skilled in the art, to which the present invention pertains, that the present disclosure may be practiced in other specific forms without changing the technical idea or essential features thereof. Therefore, the embodiments described herein are illustrative in all aspects and should not be understood as limiting.