KR930011676B1

KR930011676B1 - Cooking device

Info

Publication number: KR930011676B1
Application number: KR1019910024623A
Authority: KR
Inventors: 허재협
Original assignee: 주식회사 금성사; 이헌조
Priority date: 1991-12-27
Filing date: 1991-12-27
Publication date: 1993-12-16
Also published as: KR930013580A

Abstract

The induction heating cooker can generate Joule heat regardless of the specific resistivity of the cooker, in which the operation of the heated part is controlled by the cooker detection means. And Ferrite coating must be formed on the outer side of Fe and ceramic coated layers. In order to maximize the Joule heat generation efficiency, the rate of Fe alloy, Ferrite and the ceramic is suggested to be 90:6.5:3.5.

Description

Induction heating cooker

제1도는 종래 유도 가열조리기의 분해 사시도.1 is an exploded perspective view of a conventional induction cooker.

제2도는 본 발명 유도 가열조리기의 분해 사시도.2 is an exploded perspective view of the induction cooker of the present invention.

제3도는 본 발명 유도가열조리기의 상판을 나타낸 단면도.Figure 3 is a cross-sectional view showing the top plate of the induction heating cooker of the present invention.

제4도는 본 발명의 회로도.4 is a circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 본체 5 : 상판1: body 5: top plate

5a : 가열부 6 : 철합금코팅면5a: heating part 6: iron alloy coating surface

7 : 페라이트면 8 : 세라믹코팅면7: ferrite surface 8: ceramic coating surface

9 : 커런트 트랜스 10 : 비교부9: current transformer 10: comparison unit

11 : 파워트랜스 구동회로부11: power transformer driving circuit

본 발명은 고주파 전류에 의해 워크 코일에 자력선을 발생시켜 용기내의 음식물을 조리하는 유도가열조리기에 관한 것으로서, 좀더 구체적으로는 알루미늄과 같이 비투자율이 큰 재질로 된 용기에 담김 음식물도 조리할 수 있도록한 것이다.The present invention relates to an induction heating cooker that cooks food in a container by generating a magnetic force line in the work coil by a high frequency current, and more specifically, to cook food in a container made of a material having a high permeability such as aluminum. It is.

종래의 유도가열조리기는 제1도와 같은 형태로서, 본체(1)내에 고주파를 발생시키는 인버터(Inverter)(2)와, 고주파를 인입시켜 자력선을 발생시키는 워크 코일(3)과, 상기 워크 코일(3)을 지지하는 인버터(3)를 안착시키는 하우징(4) 그리고 본체(1) 내부의 온도 상승을 방지하는 팬(도시하는 생략함)등이 설치되고 본체(1)의 상부에는 상판(5)을 얹어 놓도록 되어 있다. 따라서 120V, 60HZ의 전류가 인입되어 인버터(2)의 회로부에 의해 고주파 직류전류로 변환되면 고주파전류가 원형의 워크 코일(3)에 인입되어 워크 코일(3)에 자력선이 발생되므로 상기 자력선은 상판(5)에 얹혀진 용기(도시는 생략함)와 결합하여 포리효과에 의해 용기의 저면에 집중되어 흐르면서 맴돌이 전류를 발생시켜 용기자체의 저항손과 직접 결합하여 쥬울(Joule)열이 발생, 용기를 가열시키게 된다. 그러나 이러한 종래의 유도가열조리기는 작동주파수가 20∼30KHZ이기 때문에 발생된 자기에너지가 철(Fe)등과 같이 비투자율이 작은 재질의 저항손과 결합하여 에너지로 이용할 수 있는 쥬울열을 발생시키게 되지만 알루미늄(Al)등과 같이 비투자율이 큰 재질로된 용기인 경우에는 저항손과 결합하여 발생되는 쥬울열이 미비하게 되므로 용기를 가열시키지 못하는 문제점이 있었다.A conventional induction heating cooker has a form as shown in FIG. 1, which includes an inverter 2 for generating a high frequency in the main body 1, a work coil 3 for introducing a high frequency to generate a magnetic force line, and the work coil ( 3) a housing 4 for mounting the inverter 3 for supporting the fan, and a fan (not shown) for preventing a temperature increase inside the main body 1, and the like, and an upper plate 5 at the upper part of the main body 1. It is supposed to put on. Therefore, when the current of 120V, 60HZ is drawn and converted into the high frequency DC current by the circuit part of the inverter 2, the high frequency current is introduced into the circular work coil 3 and the magnetic force line is generated in the work coil 3 so that the magnetic force line is the top plate. Combined with the vessel (not shown) on (5), it flows concentrated on the bottom of the vessel by the Pori effect and generates eddy currents, which is directly coupled with the resistance loss of the vessel itself to generate Joule heat and heat the vessel. Let's go. However, the conventional induction heating cooker is operating frequency is 20 ~ 30KHZ, the generated magnetic energy is combined with the resistance loss of a material with low specific permeability such as iron (Fe) to generate joule heat that can be used as energy, but aluminum ( In the case of a container made of a material having a high relative permeability, such as Al), since the joule heat generated by combining with the resistance loss is insufficient, there is a problem that the container cannot be heated.

본 발명은 종래의 이와같은 문제점을 해결하기 위해 안출한 것으로서, 상판가열부에 철합금을 소정의 두께로 코팅하여 용기의 비투자율에 관계없이 용기를 상판에 얹어 놓으면 워크 코일의 자력선이 코팅된 철합금과 결합하여 쥬울열을 발생시킬 수 있도록 하는데 그 목적이 있다.The present invention has been made in order to solve such a problem in the prior art, by coating the iron alloy to the upper portion of the heating plate to a predetermined thickness, regardless of the relative permeability of the container to place the container on the upper plate coated iron lines of the magnetic coil of the work coil The purpose is to combine with the alloy to generate joule heat.

상기 목적을 달성하기 위한 본 발명의 형태에 따르면, 본체와 결합되는 상판에 형성된 적어도 하나이상의 가열부에 철합금 코팅면을 형성함과 함께 외측으로 페라이트면을 형성하고 철합금 코팅면의 상부에는 세라믹 코팅면을 형성하여 상기 가열부의 구동이 용기 감지수단에 의해 제어될 수 있도록 된 유도가열조리기가 제공된다. 이하, 본 발명을 일실시예로 도시한 첨부된 도면 제2도 내지 제4도를 참고로하여 더욱 상세히 설명하면 다음과 같다. 첨부도면 제2도는 본 발명 유도가열 조리기의 분해사시도이고, 제3도는 상판의 종단면도이며, 제4도는 회로도로서, 인버터(2)와 워크 코일(3) 그리고 하우징(4)와 팬등이 설치되는 본체(1)의 상부에 상판(5)이 설치되어 있고 상판(5)에 형성되는 가열부(5a)의 전체 또는 적어도 1개 이상에는 철합금 코팅면(6)이 일정두께로 형성되어 있고 그 외측으로는 가열부(5a) 상호간 동작주파수의 간섭을 방지하기위한 페라이트(Ferrite)면(7)이 형성되어 있으며, 상기 철합금 코팅면(6)의 상부로는 세라믹 코팅면(8)이 형성되어 있다. 이때 코팅되는 철합금과 페라이트 그리고 세라믹의 구성비를 90 : 6.5 : 3.5로 하도록 되어 있다. 이는 워크 코일(3)의 자력선이 철합금과 결합할때 주울열의 발생 효율을 극대화시키기 위함이다. 한편 철합금 코팅의 조성비는 철(Fe)이 89.5∼90.7%, 규소(Si) 4.7∼5.1%, 알루미늄(Al) 2.7∼3.1%, 니켈(Ni) 1.9∼2.3%로 하는데, 철합금 코팅면(6)의 특성치는 주파수 20∼30KHZ에서 초기투자율 (μ)=4000∼3000c.m. 포화자속밀도 (Bm)=20,000∼21,000G, 보자력(Hc)=0.07Oe, 고유저항(R)=1000μΩ·㎝, 큐리온도=700℃, 경도=450Hv가 되도록 되어 있다. 그리고 페라이트 코팅의 조성비는 산화철(Fe₂O₃) 84.7∼86.3%, 아연(Zn) 3.4∼3.8%, 망간(Mn) 1.0∼1.4%, 니켈(Ni) 4.3∼4.7%, 철(Fe) 5.0∼5.4% 로 되어 있으며 세라믹 코팅의 조성비는 산화규소(SiO₂) 95.9∼96.7%, 산화티타늄(TiO₂) 1.1∼1.5%, 망간(Mn) 2.2∼2.6%로 되어 있다.According to an aspect of the present invention for achieving the above object, at least one heating portion formed on the upper plate coupled to the main body and at the same time to form an iron alloy coating surface to form a ferrite surface on the outside and the ceramic on the iron alloy coating surface An induction heating cooker is provided in which a coating surface is formed so that driving of the heating unit can be controlled by a vessel sensing means. Hereinafter, the present invention will be described in more detail with reference to FIGS. 2 through 4 of the accompanying drawings. 2 is an exploded perspective view of the induction heating cooker of the present invention, FIG. 3 is a longitudinal cross-sectional view of the upper plate, and FIG. 4 is a circuit diagram, in which an inverter 2, a work coil 3, a housing 4, a fan, etc. are installed. The upper plate 5 is provided on the upper portion of the main body 1, and the iron alloy coating surface 6 is formed to have a predetermined thickness on the whole or at least one or more of the heating portions 5a formed on the upper plate 5. A ferrite surface 7 is formed on the outside to prevent interference of operating frequencies between the heating portions 5a, and a ceramic coating surface 8 is formed on the iron alloy coating surface 6. It is. At this time, the composition ratio of the coated iron alloy, ferrite and ceramics is 90: 6.5: 3.5. This is to maximize the generation efficiency of Joule heat when the magnetic force line of the work coil 3 is combined with the iron alloy. On the other hand, the composition ratio of iron alloy coating is 89.5-90.7% of iron (Fe), 4.7-5.1% of silicon (Si), 2.7-3.1% of aluminum (Al), and 1.9-2.3% of nickel (Ni). The characteristic value of (6) is the initial permeability (μ) = 4000-3000 c.m. Saturation magnetic flux density (Bm) = 20,000-21,000G, coercive force (Hc) = 0.07Oe, specific resistance (R) = 1000 mu OMEGA -cm, Curie temperature = 700 DEG C, hardness = 450 Hv. The composition ratio of the ferrite coating was 84.7 to 86.3% of iron oxide (Fe ₂ O ₃ ), 3.4 to 3.8% of zinc (Zn), 1.0 to 1.4% of manganese (Mn), 4.3 to 4.7% of nickel (Ni), and iron (Fe) 5.0. The composition ratio of the ceramic coating is 95.9 to 96.7% of silicon oxide (SiO ₂ ), 1.1 to 1.5% of titanium oxide (TiO ₂ ) and 2.2 to 2.6% of manganese (Mn).

그리고 상기한 바와같이 구성된 가열부(5a)에 의해 상판(5)에 용기가 얹혀지지 않은 상태에서 워크 코일(3)과 철합금코팅면(6) 사이에 전류가 유기되어 구동되는 것을 방지하기 위해 제4도에 도시한 바와같이 용기 감지수단이 설치되는데, 상기 용기 감지수단은 용기감지회로부(12)의 제어에 의해 입력전압에서 전류를 유기하는 커런트 트랜스(9)와, 상판(5)의 용기유무와 양을 감지하여 그 값에 따라 커런트 트랜스(9)를 조절하는 용기감지회로부(12)와, 기준신호와 용기감지회로부(12)의 신호를 비교하여 그 결과를 파워트랜스 구동회로에 공급하는 비교부(10)와, 비교부의 신호에 따라 상판(5)의 가열부(5)의 가열부(5a)에 전류가 유기되는 것을 스위칭하는 파워트랜스 구동회로부(11)로 구성되어 있다.In order to prevent the current from being induced and driven between the work coil 3 and the iron alloy coating surface 6 in a state where the container is not placed on the top plate 5 by the heating unit 5a configured as described above. As shown in FIG. 4, a vessel sensing means is provided. The vessel sensing means includes a current transformer 9 which induces a current at an input voltage under the control of the vessel sensing circuit 12, and a vessel of the upper plate 5; Compares the signal of the vessel sensing circuit unit 12 and the reference signal and the vessel sensing circuit unit 12 that detects the presence and quantity and adjusts the current transformer 9 according to the value, and supplies the result to the power transformer driving circuit. Comparing unit 10 and power transformer driving circuit unit 11 for switching the current is induced in the heating unit 5a of the heating unit 5 of the upper plate 5 according to the signal of the comparing unit.

이와같이 구성된 본 발명의 작용효과를 설명하면 다음과 같다. 먼저 120V, 60HZ의 전류가 인입되어 인버터(2)의 회로부에 의해 고주파 직류전류로 변환되면 고주파 전류가 원형의 워크코일(3)에 인입되어 자력선이 발생된다. 이에 따라 자력선은 가열부(5a)에 코팅된 철합금 코팅면(6)과 결합하여 포리효과에 의해 철합금 코팅면(6)에 집중적으로 흐르면서 맴돌이 전류를 발생시켜 철합금 코팅면(6)의 저항손과 직접 결합하여 쥬울열을 발생시키게 되는데, 이때 철합금코팅면(6)의 외측에 형성된 페라이트면(7)이 각 가열부(5a)간의 동작주파수 간섭을 방지하여 주게 된다. 한편 가열부(5a)에 용기를 올려 놓지 않은 상태에서는 제4도에 도시한 바와같이 커런트 트랜스(9)에 유기되는 전류치가 작게 되므로 비교부(10)에서 파워트랜스 구동회로부(11)로 하이(High)를 보내 파워트랜스 구동 회로부(11)는 상판(5)의 가열부(5a)에 전류가 유기되지 않도록 스위칭하게 되므로 쥬울열이 발생되지 않는다. 그러나 가열부(5a)에 용기를 올려놓을 경우에는 커런트 트랜스(9)에 유기되는 전류치가 크게 되므로 비교부(10)에서 파워트랜스 구동회로부(11)로 로우(Low)신호를 보내게 된다.Referring to the effects of the present invention configured as described above are as follows. First, when 120V and 60HZ of current are drawn in and converted into a high frequency DC current by the circuit portion of the inverter 2, a high frequency current is drawn into the circular work coil 3 to generate a magnetic field line. Accordingly, the lines of magnetic force are combined with the iron alloy coating surface 6 coated on the heating part 5a to flow intensively on the iron alloy coating surface 6 by the effect of pori, thereby generating a eddy current, thereby forming the iron alloy coating surface 6. Directly coupled with the resistance hand to generate joule heat, wherein the ferrite surface 7 formed on the outside of the iron alloy coating surface (6) to prevent the operating frequency interference between each heating portion (5a). On the other hand, in the state in which the container is not placed on the heating part 5a, as shown in FIG. 4, the current value induced in the current transformer 9 becomes small. By sending a high), the power transformer driving circuit 11 is switched so that the current is not induced to the heating portion 5a of the upper plate 5, so no joule heat is generated. However, when the container is placed on the heating unit 5a, the current value induced by the current transformer 9 becomes large, so that the low signal is sent from the comparator 10 to the power transformer driver circuit unit 11.

이에따라 파워트랜스 구동회로부(11)가 상판(5)의 가열부(5a)에 전류를 유기시키게 되므로 워크 코일(3)에서 발생된 자력선이 철합금 코팅면(6)과 결합하여 쥬울열을 발생시키게 되는 것이다.Accordingly, since the power transformer driving circuit part 11 induces a current in the heating part 5a of the upper plate 5, the magnetic force lines generated by the work coil 3 are combined with the iron alloy coating surface 6 to generate joule heat. Will be.

이상에서와 같이 본 발명은 가열부(5a)에 철합금 코팅면(6)을 형성하는 구조에 의해 비투자율이 큰 재질로 된 용기내의 음식물을 조리할 수 있게 되는 효과를 가지게 된다.As described above, the present invention has the effect of being able to cook food in a container made of a material having a high relative permeability by the structure of forming the iron alloy coating surface 6 on the heating part 5a.

Claims

The iron alloy coating surface 6 and the ceramic coating surface 8 are sequentially formed on at least one heating portion 5a formed on the upper plate 5 coupled to the main body 1 so that the driving of the heating portion 5a is performed. Induction cooker adapted to be controlled by a sensing means.

The induction heating cooker according to claim 1, wherein a ferrite surface (7) is formed on the outer circumference of the iron alloy coating surface (6) and the ceramic coating surface (8).

The induction heating cooker according to claim 1 or 2, wherein the composition ratio of iron alloy: ferrite: ceramic is 90: 6.5: 3.5.

The composition ratio of the iron alloy coating according to claim 1 or 2, wherein the composition ratio of the iron alloy coating is iron (Fe) 89.5 to 90.7%, silicon (Si) 4.7 to 5.1%, aluminum (Al) 2.7 to 3.1% and nickel (Ni) 1.9 to 2.3. The composition ratio of ferrite coating is 84.7 to 86.3% of iron oxide (Fe ₂ O ₃ ), 3.4 to 3.8% of zinc (Zn), 1.0 to 1.4% of manganese (Mn), 4.3 to 4.7% of nickel (Ni), and iron (Fe). ) The induction heating cooker is composed of 5.0 ~ 5.4% of ceramic coating (SiO ₂ ), 95.9 ~ 96.7%, titanium oxide (TiO ₂ ) 1.1 ~ 1.5%, manganese (Mn) 2.2 ~ 2.6%.

The characteristic value of the iron alloy coating surface 6 is an initial permeability (mu) = 4000-3000 c.m, saturation magnetic flux density (Bm) = 20,000-21,000 G, and coercive force (Hc) = at a frequency of 20 to 30 KHZ. Induction heating cooker having 0.07 Oe, specific resistance (R) = 100μΩ · ㎝, Curie temperature = 700 ° C., hardness = 450kv.

The container detecting means according to claim 1, wherein the container detecting means detects the current transformer 9 which induces a current at an input voltage and the presence or absence of a container of the upper plate 5 under the control of the container detecting circuit unit 12, and according to the value thereof. The vessel sensing circuit unit 12 for adjusting the current transformer 9, the comparison unit 10 for comparing the signal of the reference signal and the vessel sensing circuit unit 12 and supplying the result to the power transformer driving circuit, and the signal of the comparing unit. Induction heating cooker consisting of a power transformer driving circuit portion (11) for switching the current is induced in the heating portion (5a) of the upper plate according to.