TWI802230B - Judgment method of pot type - Google Patents
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Abstract
一種鍋具種類的判定方法包含：儲存有一閾值公式；當一微控制器開始對一鍋具加熱時，先以一第一預定功率在一第一預加熱期間之內對該鍋具加熱，並在判斷該鍋具溫度達到一第一預定溫度時，記錄一記錄溫度及一共振電路的一迴路電壓的一待判斷振盪次數；該微控制器計算在該記錄溫度時，該閾值公式所對應的一基準閾值；藉由該微控制器在判斷該待判斷振盪次數大於或等於該基準閾值時，決定該鍋具屬於一導磁係數相對差的鍋具類別，而在判斷該待判斷振盪次數小於該基準閾值時，決定該鍋具屬於一導磁係數相對佳的鍋具類別。A method for judging the type of pot includes: storing a threshold formula; when a microcontroller starts to heat a pot, first heat the pot with a first predetermined power within a first preheating period, and When judging that the temperature of the pot reaches a first predetermined temperature, record a record temperature and a number of oscillations to be judged of a loop voltage of a resonant circuit; the microcontroller calculates when the record temperature corresponds to the threshold value formula A reference threshold; when the microcontroller judges that the number of oscillations to be judged is greater than or equal to the reference threshold, it is determined that the pan belongs to a pot category with a relatively poor magnetic permeability, and when it is judged that the number of oscillations to be judged is less than When the reference threshold is reached, it is determined that the pan belongs to a category of pans with relatively good magnetic permeability.
Description
本發明是有關於一種鍋具種類的判定方法，特別是指一種用於電磁爐的鍋具種類的判定方法。The invention relates to a method for judging the type of pan, in particular to a method for judging the type of pan used in an electromagnetic oven.
現有的電磁爐在使用時，會依照使用者所設定的功率大小，如1200瓦、1400瓦、1600瓦、1800瓦、2000瓦等不同段數的選擇，而提供對應的加熱功率，以對設置於電磁爐上的一鍋具加熱。然而，當該鍋具是屬於一種導磁性較差的材質時，如不鏽鋼鍋，則該電磁爐在相對較高的加熱功率(如1800瓦與2000瓦)執行加熱時，會產生相對較低加熱功率(如1200瓦、1400瓦與1600瓦)時較為吵雜的噪音。因此，如何分辨鍋具是屬於導磁性較差或較佳且進而避免在加熱時產生吵雜的噪音便成為一個待解決的問題。When the existing induction cooker is in use, it will provide corresponding heating power according to the power set by the user, such as 1200 watts, 1400 watts, 1600 watts, 1800 watts, 2000 watts, etc. Heat a pan on the induction hob. However, when the pot is made of a material with poor magnetic permeability, such as a stainless steel pot, then the induction cooker will generate a relatively low heating power ( Such as 1200 watts, 1400 watts and 1600 watts) when the noise is relatively loud. Therefore, how to distinguish whether the pot has poor or good magnetic permeability and thus avoid generating loud noises during heating has become a problem to be solved.
因此，本發明的目的，即在提供一種用於電磁爐的鍋具種類的判定方法。Therefore, the object of the present invention is to provide a method for determining the type of pan used in an induction cooker.
於是，本發明提供一種鍋具種類的判定方法，適用於一電磁爐及一鍋具。該電磁爐包含一微控制器、一共振電路、及一溫度感測器。當該電磁爐對該鍋具加熱時，該微控制器偵測並儲存在距離當下之前的一預定期間之內該共振電路的一迴路電壓的一振盪次數。該溫度感測器用於量測該鍋具的溫度而輸出一鍋具溫度。該鍋具種類的判定方法包含步驟(A)~(D)。Therefore, the present invention provides a method for determining the type of pot, which is suitable for an induction cooker and a pot. The induction cooker includes a microcontroller, a resonant circuit, and a temperature sensor. When the induction cooker heats the pan, the microcontroller detects and stores an oscillation frequency of a loop voltage of the resonant circuit within a predetermined period before the current moment. The temperature sensor is used to measure the temperature of the pot and output a pot temperature. The method for judging the type of the pot includes steps (A) to (D).
於步驟(A)，藉由該微控制器儲存有一閾值公式CDth= M0*T+C0，其中，CDth是一閾值，M0是預先設定的一斜率，C0是預先設定的一常數，T是一溫度。In step (A), a threshold value formula CDth=M0*T+C0 is stored by the microcontroller, wherein CDth is a threshold value, M0 is a preset slope, C0 is a preset constant, and T is a temperature.
於步驟(B)，當該微控制器設定以大於一第一預定功率而開始對該鍋具加熱時，先以該第一預定功率在一第一預加熱期間之內對該鍋具加熱，並在判斷該鍋具溫度達到一第一預定溫度時，將此時的該鍋具溫度作為一記錄溫度，並儲存此時所對應的該振盪次數為一待判斷振盪次數。In step (B), when the microcontroller is set to start heating the pan with a power greater than a first predetermined power, first heat the pan with the first predetermined power within a first preheating period, And when it is judged that the temperature of the pot reaches a first predetermined temperature, the temperature of the pot at this time is taken as a recorded temperature, and the corresponding oscillation times are stored as an oscillation number to be determined.
於步驟(C)，藉由該微控制器計算在該記錄溫度時，該閾值公式所對應的該閾值為一基準閾值。In step (C), when the microcontroller calculates the recording temperature, the threshold corresponding to the threshold formula is a reference threshold.
於步驟(D)，藉由該微控制器在判斷該待判斷振盪次數大於或等於該基準閾值時，決定該鍋具屬於一導磁係數相對差的鍋具類別，而在判斷該待判斷振盪次數小於該基準閾值時，決定該鍋具屬於一導磁係數相對佳的鍋具類別。In step (D), when the microcontroller determines that the number of oscillations to be judged is greater than or equal to the reference threshold, it is determined that the pan belongs to a pan category with a relatively poor magnetic permeability, and when judging that the oscillation to be judged When the number of times is less than the reference threshold, it is determined that the pan belongs to a pan category with a relatively good magnetic permeability.
在一些實施態樣中，其中，在步驟(B)中，當該微控制器以該第一預定功率對該鍋具加熱但在該第一預加熱期間結束時，判斷出該鍋具溫度仍小於該第一預定溫度，則將此時的該鍋具溫度作為該記錄溫度，並儲存此時所對應的該振盪次數為該待判斷振盪次數。In some implementation aspects, wherein, in step (B), when the microcontroller heats the pan with the first predetermined power but ends during the first preheating period, it is determined that the temperature of the pan is still If the temperature is lower than the first predetermined temperature, the temperature of the pot at this time is taken as the recorded temperature, and the corresponding oscillation times are stored as the oscillation times to be determined.
在一些實施態樣中，其中，在步驟(D)，當該微控制器決定該鍋具屬於該導磁係數相對佳的鍋具類別時，根據一加熱設定值選擇對應的加熱功率，而當該微控制器決定該鍋具屬於該導磁係數相對差的鍋具類別時，選擇以一第一加熱功率作為該加熱設定值大於或等於該第一加熱功率時的加熱功率。In some implementation aspects, wherein, in step (D), when the microcontroller determines that the cookware belongs to the cookware category with a relatively good magnetic permeability, the corresponding heating power is selected according to a heating setting value, and when When the microcontroller determines that the cookware belongs to the category of cookware with relatively poor magnetic permeability, it selects a first heating power as the heating power when the heating set value is greater than or equal to the first heating power.
在一些實施態樣中，其中，在步驟(A)中，該微控制器所儲存的該閾值公式改為CDth=M0*T+C0+CDho1，CDho1是針對該電磁爐且預先設定的一部品公差常數。In some implementation aspects, wherein, in step (A), the threshold value formula stored in the microcontroller is changed to CDth=M0*T+C0+CDho1, where CDho1 is a preset tolerance for a part of the induction cooker constant.
在一些實施態樣中，其中，在步驟(A)中，該微控制器所儲存的該閾值公式改為CDth=M0*T+C0+CDho1+CDho2，CDho2是一電源電壓補正值，該微控制器偵測該電磁爐的一電源電壓，並根據預先設定的一對照表，在該對照表中獲得對應該電源電壓的該電源電壓補正值。In some implementation aspects, wherein, in step (A), the threshold value formula stored in the microcontroller is changed to CDth=M0*T+C0+CDho1+CDho2, where CDho2 is a power supply voltage correction value, and the micro The controller detects a power supply voltage of the induction cooker, and obtains the power supply voltage correction value corresponding to the power supply voltage in the comparison table according to a preset comparison table.
在一些實施態樣中，其中，在步驟(A)中，藉由一第一標準公式CDth1=M1*T+C1、一第二標準公式CDth2=M2*T+C2、及一第三標準公式CDth3=M3*T+C3，M1、M2、及M3是各自的斜率，C1、C2、及C3是各自的常數，M0=(M1-M2)/2+(M3-M2)/ 2，C0=(C1-C2)/2+(C3-C2)/2。其中，該第一標準公式是該電磁爐以該第一預定功率對一第一標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。該第二標準公式是該電磁爐以該第一預定功率對一第二標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。該第三標準公式是該電磁爐以該第一預定功率對一第三標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。In some implementations, wherein, in step (A), by a first standard formula CDth1=M1*T+C1, a second standard formula CDth2=M2*T+C2, and a third standard formula CDth3=M3*T+C3, M1, M2, and M3 are their respective slopes, C1, C2, and C3 are their respective constants, M0=(M1-M2)/2+(M3-M2)/2, C0= (C1-C2)/2+(C3-C2)/2. Wherein, the first standard formula is that the induction cooker heats a first standard pan with the first predetermined power to obtain a plurality of the temperatures and a plurality of corresponding oscillation times, and then the plurality of temperatures and a plurality of The number of oscillations was obtained by regression analysis. The second standard formula is that the induction cooker heats a second standard pan with the first predetermined power to obtain a plurality of temperatures and a plurality of corresponding oscillation times, and then for a plurality of temperatures and a plurality of oscillations obtained by regression analysis. The third standard formula is that the induction cooker heats a third standard pan with the first predetermined power to obtain a plurality of temperatures and a plurality of corresponding oscillation times, and then for a plurality of temperatures and a plurality of oscillations obtained by regression analysis.
在一些實施態樣中，其中，在步驟(A)中，該第一標準鍋具是材質為SUS304不鏽鋼的鍋具，該第二標準鍋具是中國法規GB21456-2008所定義的標準鍋具，且材質為低碳鋼，該第三標準鍋具是台灣法規CNS60335-2-6的IEC60335-2-6所定義的試驗爐架元件容器或中國法規GB4706.22-2002的IEC60335-2-6所定義的電磁灶頭試驗用容器，且材質為低碳鋼。In some embodiments, wherein, in step (A), the first standard cookware is a cookware made of SUS304 stainless steel, and the second standard cookware is a standard cookware defined in Chinese regulations GB21456-2008, And the material is low-carbon steel. The third standard cookware is the test hob component container defined by IEC60335-2-6 of Taiwan regulation CNS60335-2-6 or the container of IEC60335-2-6 of Chinese regulation GB4706.22-2002. The defined container for the test of the induction cooktop, and the material is low carbon steel.
本發明的功效在於：藉由該微控制器開始對該鍋具加熱時，先以該第一預定功率在該第一預加熱期間之內對該鍋具加熱至該第一預定溫度，並將所記錄的該記錄溫度代入該閾值公式以獲得該基準閾值，且再判斷所記錄的該待判斷振盪次數與該基準閾值之間的大小關係，而能夠決定該鍋具是屬於該導磁係數相對差的鍋具類別或該導磁係數相對佳的鍋具類別。The effect of the present invention is: when the microcontroller starts to heat the pot, the pot is first heated to the first predetermined temperature with the first predetermined power within the first preheating period, and the Substituting the recorded recorded temperature into the threshold formula to obtain the reference threshold, and then judging the size relationship between the recorded oscillation times to be judged and the reference threshold, it can be determined whether the cookware belongs to the magnetic permeability relative Poor pan type or pan type with relatively good magnetic permeability.
在本發明被詳細描述之前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.
參閱圖1與圖2，本發明鍋具種類的判定方法之一實施例，適用於一電磁爐及一鍋具9。該電磁爐包含一微控制器(MCU) 1、一共振電路2、及一溫度感測器3，當該電磁爐對該鍋具9加熱時，也就是該電磁爐被使用者設定而在加熱的過程中，該微控制器1控制流經該共振電路2的電流而對該鍋具9加熱，且偵測並儲存在距離當下之前的一預定期間之內該共振電路2的一迴路電壓的一振盪次數。該共振電路2包括一線圈電感及一共振電容，且該線圈電感及該共振電容彼此反覆作充電與放電而形成共振。該預定期間例如是數十微秒(us)。該溫度感測器3用於量測該鍋具9的溫度而輸出一鍋具溫度。Referring to FIG. 1 and FIG. 2 , an embodiment of the method for judging the type of a cooker according to the present invention is applicable to an induction cooker and a
該鍋具種類的判定方法包含步驟S1~S4。在本實施例中，該電磁爐的一加熱設定值例如是能夠被設定為800瓦、1000瓦、1200瓦、1400瓦、1600瓦、1800瓦、或2000瓦，以對應不同的加熱功率。The method for determining the type of cookware includes steps S1 to S4. In this embodiment, a heating setting value of the induction cooker can be set as 800 watts, 1000 watts, 1200 watts, 1400 watts, 1600 watts, 1800 watts, or 2000 watts to correspond to different heating powers.
於步驟S1，藉由該微控制器1儲存有一閾值公式CDth= M0*T+C0，其中，CDth是一閾值，M0是預先設定的一斜率，C0是預先設定的一常數，T是該鍋具的一溫度。In step S1, a threshold value formula CDth=M0*T+C0 is stored by the
更詳細地說，該電磁爐在開發的過程中，藉由工程人員事先求出一第一標準公式CDth1=M1*T+C1、一第二標準公式CDth2=M2*T+C2、及一第三標準公式CDth3=M3*T+C3，M1、M2、及M3是各自的斜率，C1、C2、及C3是各自的常數，則該閾值公式的M0=(M1-M2)/2+(M3-M2)/2，C0=(C1-C2)/2+ (C3-C2)/2。其中，該第一標準公式是該電磁爐以一第一預定功率對一第一標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。該第二標準公式是該電磁爐以該第一預定功率對一第二標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。該第三標準公式是該電磁爐以該第一預定功率對一第三標準鍋具加熱以獲得多個該溫度與分別對應的多個該振盪次數，並再對多個該溫度與多個該振盪次數作迴歸分析而獲得。在本實施例中，該第一標準鍋具是材質為SUS304不鏽鋼的鍋具。該第二標準鍋具是中國法規GB21456-2008所定義的標準鍋具，且材質為低碳鋼。該第三標準鍋具是台灣法規CNS60335-2-6的IEC60335-2-6所定義的試驗爐架元件容器或中國法規GB4706.22-2002的IEC60335-2-6所定義的電磁灶頭試驗用容器，且材質為低碳鋼。In more detail, during the development process of the induction cooker, the engineering personnel obtained a first standard formula CDth1=M1*T+C1, a second standard formula CDth2=M2*T+C2, and a third standard formula in advance. The standard formula CDth3=M3*T+C3, M1, M2, and M3 are their respective slopes, C1, C2, and C3 are their respective constants, then M0=(M1-M2)/2+(M3- M2)/2, C0=(C1-C2)/2+ (C3-C2)/2. Wherein, the first standard formula is that the induction cooker heats a first standard pan with a first predetermined power to obtain a plurality of temperatures and a plurality of corresponding oscillation times, and then for a plurality of temperatures and a plurality of The number of oscillations was obtained by regression analysis. The second standard formula is that the induction cooker heats a second standard pan with the first predetermined power to obtain a plurality of temperatures and a plurality of corresponding oscillation times, and then for a plurality of temperatures and a plurality of oscillations obtained by regression analysis. The third standard formula is that the induction cooker heats a third standard pan with the first predetermined power to obtain a plurality of temperatures and a plurality of corresponding oscillation times, and then for a plurality of temperatures and a plurality of oscillations obtained by regression analysis. In this embodiment, the first standard pot is a pot made of SUS304 stainless steel. The second standard cookware is a standard cookware defined in Chinese regulations GB21456-2008, and the material is low-carbon steel. The third standard cookware is the test hob element container defined in IEC60335-2-6 of the Taiwan regulation CNS60335-2-6 or the electromagnetic cooker test container defined in the IEC60335-2-6 of the Chinese regulation GB4706.22-2002 , and the material is low carbon steel.
於步驟S2，當該微控制器1設定以大於該第一預定功率而開始對該鍋具9加熱時，也就是該電磁爐被使用者設定大於該第一預定功率而開始加熱時，例如設定以1600瓦、1800瓦、或2000瓦的功率要加熱時，該微控制器1先以該第一預定功率在一第一預加熱期間之內對該鍋具9加熱，並在判斷該鍋具溫度達到一第一預定溫度時，將此時的該鍋具溫度作為一記錄溫度(即等於該第一預定溫度)，並儲存此時所對應的該振盪次數為一待判斷振盪次數。在本實施例中，該第一預定功率是1400瓦，該第一預加熱期間等於30秒，該第一預定溫度等於攝氏50度。In step S2, when the
而當該微控制器1以該第一預定功率對該鍋具9加熱但在該第一預加熱期間結束時，判斷出該鍋具溫度(例如是45度)仍小於該第一預定溫度，則將此時的該鍋具溫度作為該記錄溫度(如45度)，並儲存此時所對應的該振盪次數為該待判斷振盪次數。And when the
於步驟S3，藉由該微控制器1計算在該記錄溫度時，該閾值公式所對應的該閾值為一基準閾值，也就是將該記錄溫度代入該閾值公式所得出的該閾值。In step S3, when the
於步驟S4，藉由該微控制器1在判斷該待判斷振盪次數大於或等於該基準閾值時，決定該鍋具9屬於一導磁係數相對差的鍋具類別，而在判斷該待判斷振盪次數小於該基準閾值時，決定該鍋具9屬於一導磁係數相對佳的鍋具類別。該導磁係數相對差的鍋具類別例如是以SUS304為材料所製成的鍋具，而該導磁係數相對佳的鍋具類別是以鐵或SUS430為材料所製成的鍋具。In step S4, when the micro-controller 1 judges that the number of vibrations to be judged is greater than or equal to the reference threshold, it is determined that the
再者，當該微控制器1決定該鍋具9屬於該導磁係數相對佳的鍋具類別時，該微控制器1是根據該加熱設定值選擇對應的加熱功率，也就是說，在本實施例中，不論該加熱設定值是800瓦、1000瓦、1200瓦、1400瓦、1600瓦、1800瓦、或2000瓦，該電磁爐依照對應的加熱功率對屬於該導磁係數相對佳的鍋具類別的該鍋具9加熱時，都不會產生超過一預定分貝之大小的吵雜噪音。而當該微控制器1決定該鍋具9屬於該導磁係數相對差的鍋具類別時，選擇以一第一加熱功率作為該加熱設定值大於或等於該第一加熱功率時的加熱功率。也就是說，在本實施例中，該第一加熱功率是1600瓦，當該加熱設定值是1600瓦、1800瓦、或2000瓦時，該電磁爐對屬於該導磁係數相對差的鍋具類別的該鍋具9加熱時，都會以1600瓦的功率加熱，使得所產生的噪音不會超過該預定分貝的大小，而能夠避免以1800瓦或2000瓦的加熱功率加熱時，屬於該導磁係數相對差的鍋具類別的該鍋具9發出超過該預定分貝之大小的吵雜噪音。Furthermore, when the
要特別補充說明的是：該第一預定功率、該第一加熱功率、該第一預加熱期間、及該預定分貝的數值都是藉由工程人員在開發過程中，經由實際量測而決定。此外，在本實施例中，該第一預定功率的選擇是根據對屬於該導磁係數相對差的鍋具類別的該鍋具9或屬於該導磁係數相對佳的鍋具類別的該鍋具9加熱時，該電磁爐都不會發出超過該預定分貝之大小的吵雜噪音而決定。It should be specially added that: the first predetermined power, the first heating power, the first preheating period, and the predetermined decibel values are all determined by engineering personnel through actual measurement during the development process. In addition, in this embodiment, the selection of the first predetermined power is based on the selection of the
另外，在其他的實施例中，步驟S1的該閾值公式也可以改為CDth=M0*T+C0+CDho1或CDth=M0*T+C0+CDho1+ CDho2。其中，CDho1是針對該電磁爐且預先設定的一部品公差常數。CDho2是一電源電壓補正值，該微控制器1偵測該電磁爐的一電源電壓，並根據預先設定的一對照表，在該對照表中獲得對應該電源電壓的該電源電壓補正值。In addition, in other embodiments, the threshold formula in step S1 can also be changed to CDth=M0*T+C0+CDho1 or CDth=M0*T+C0+CDho1+CDho2. Wherein, CDho1 is a preset tolerance constant for the induction cooker. CDho2 is a power supply voltage correction value. The
更詳細地說，由於在量產的過程中，同一個型號但不同台的該電磁爐都可能會存在不同的部品公差，因此，針對每一該電磁爐，工程人員對該GB鍋以該第一預定功率量測在一第二預定溫度(如70度)時，該電磁爐的該振盪次減去與作為獲取該第二標準公式的同型號的該電磁爐的該振盪次數所獲得的差值。下表舉例說明該對照表的一種態樣，類似地，是藉由工程人員改變該電源電壓的大小，以實驗量測的方式獲得對應的該振盪次數，進而得出對應的該電源電壓補正值。
綜上所述，藉由該微控制器1設定以大於一第一預定功率而開始對該鍋具9加熱時，先以該第一預定功率在該第一預加熱期間之內對該鍋具9加熱至該第一預定溫度，並將所記錄的該記錄溫度代入該閾值公式以獲得該基準閾值，且再判斷所記錄的該待判斷振盪次數與該基準閾值之間的大小關係，而能夠決定該鍋具9是屬於該導磁係數相對差的鍋具類別或該導磁係數相對佳的鍋具類別。此外，該微控制器1還能夠對屬於該導磁係數相對差的鍋具類別的該鍋具9在加熱時，調整與限制對應的加熱功率，使得所發出的吵雜噪音小於預定分貝之大小，故確實能達成本發明的目的。In summary, when the
惟以上所述者，僅為本發明的實施例而已，當不能以此限定本發明實施的範圍，凡是依本發明申請專利範圍及專利說明書內容所作的簡單的等效變化與修飾，皆仍屬本發明專利涵蓋的範圍內。But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.
1:微控制器 2:共振電路 3:溫度感測器 9:鍋具 S1~S4:步驟1: Microcontroller 2: Resonant circuit 3: Temperature sensor 9: pot S1~S4: steps
本發明的其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中： 圖1是一方塊圖，說明本發明鍋具種類的判定方法所適用的一電磁爐；及 圖2是一流程圖，說明本發明鍋具種類的判定方法的一實施例。 Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a block diagram illustrating an induction cooker to which the method for judging the type of the pan of the present invention is applicable; and FIG. 2 is a flow chart illustrating an embodiment of the method for judging the type of cookware according to the present invention.
S1~S4:步驟 S1~S4: steps
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| CN111912896A (en) * | 2019-05-08 | 2020-11-10 | 浙江绍兴苏泊尔生活电器有限公司 | Method for determining material of inner pot, cooking utensil and computer storage medium |
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| KR0152839B1 (en) * | 1995-05-16 | 1998-12-15 | 구자홍 | Cooking vessel material decision device for induction heating cooker |
| JP5493648B2 (en) * | 2009-09-28 | 2014-05-14 | パナソニック株式会社 | Induction heating cooker |
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