JPH06319637A - Electric boiling/cooking device - Google Patents

Abstract

PURPOSE:To boil down and cook food by providing a ferromagnetic substance on a pot container made of pottery, and heating it by electromagnetic induction. CONSTITUTION:A ferromagnetic substance 3 is provided on the outside of a pot container 2, and it is heated by the electromagnetic inductive action to boil down and cook food. The pot container 2 is supported by a support container 4 made of a heat-resistant plastic material such as a polyphenylene sulfide resin, and it is provided with a temperature detecting means 6 mainly constituted of a heat receiver 7 and a temperature detecting element 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stew cooker having a detachable pot container made of ceramics and capable of so-called gut simmering cooking.

[0002]

2. Description of the Related Art Conventionally, an electric stew cooker of this type has a body 24 having a handle 22 and a leg 23, as shown in FIG.
A heating container 26 equipped with a heating element 25 is disposed inside, and is tightened and fixed at the bottom with a screw 27, and an air layer 28 is formed inside the heating container 26. A pot container 29 is attached and a glass lid 30 is attached.
The electric stew cooker 31 capable of cooking steeply by heating the heating element 25 is constructed.

[0003] In the case of simmering cooking with an electric simmer cooker having such a conventional structure, heat is transferred to the air layer 28 and then reaches the pot container 29 made of ceramics. The transmissivity is extremely poor, and there is a drawback that it takes a long time (rise time) to reach the state of simmering cooking. Moreover, in the conventional configuration, when the heating power of the heating element 25 is increased in an attempt to bring the temperature of the food to a predetermined temperature (boiling) in a short time, the temperature of the main body portion around the heating element 25 rises too much. There was a problem of thermal deterioration.

[0004]

The conventional problem to be solved by the present invention is that in the conventional electric cooker, the heat from the heating element is not well transferred to the object to be cooked. It is an object of the present invention to provide an electric stew cooker that is practical and convenient, mainly based on this problem.

That is, the invention according to claim 1 is a detachable pot container made of so-called porcelain, such as pottery or porcelain, provided with a ferromagnetic material on the outer side, and heat resistance for enclosing and supporting the pot container from the outside. By providing a support container made of material and an electromagnetic induction coil arranged at the side and bottom of the support container, the ferromagnetic material itself provided in the pot container made of ceramics is heated,
The purpose is to dramatically improve the heat transfer coefficient and significantly shorten the rise time.

Further, the invention according to claim 2 has an object to detect the temperature of the food in a removable pot container made of ceramics and provided with a ferromagnetic material by providing a temperature detecting means. .

Further, the invention according to claim 3 is to control the energization to the electromagnetic induction coil according to the detected temperature from the temperature detecting means so that the rising time can be shortened and simmering after the rising can be done. I am trying.

Further, the invention according to claim 4 aims to prevent the temperature of the heat receiving body itself from rising due to the action of the magnetic flux from the electromagnetic induction coil by providing the heat receiving body made of a non-magnetic material.

A fifth object of the present invention is to accurately detect the temperature of the heat receiving body by bringing the temperature detecting element into contact with the heat receiving body.

According to the invention of claim 6, a non-magnetic temperature detecting element such as a thermistor is attached to a holding body made of a non-magnetic material so that the temperature of the temperature detecting element itself rises due to the action of the magnetic flux from the electromagnetic induction coil. The purpose is to prevent temperature fluctuations and enable highly accurate temperature detection.

Further, the invention according to claim 7 is provided with an urging means for urging the temperature detecting element toward the heat receiving body, so that the variation of the contact state due to the dimensional variation of the components such as the pan container is always kept constant. Is intended.

Further, according to the invention of claim 8, since the heat receiving body is a metal body made of an aluminum alloy, it is a non-magnetic body and at the same time a good heat conductor. The purpose is to detect with less delay.

Further, according to the invention of claim 9, a heat receiving body is attached to a through hole provided in the bottom portion of the pot container through a heat resistant sealing material to surely prevent leakage such as simmering and enhance reliability. Is intended.

According to a tenth aspect of the present invention, the electromagnetic induction coil is molded from a heat-resistant plastic material as a supporting container by molding, so that the coil array can be maintained and the heat resistance can be improved with a minimum number of parts. It is an object.

According to the eleventh aspect of the present invention, the aluminum alloy metal body of the heat receiving body is coated with a non-adhesive resin such as a fluororesin to prevent sticking of the cooked food or the like and detect the temperature of the cooked food. The purpose is to eliminate the deterioration of.

According to a twelfth aspect of the present invention, the outer ends of the ferromagnetic material and the non-magnetic heat receiving body at the bottom of the pot container made of ceramic are positioned inside the protruding end of the pot container. When you remove the pot container and put it in the kitchen,
The object is to prevent the external force from acting on the outer ends of the ferromagnetic body and the non-magnetic heat receiving body on the bottom surface of the pot container by receiving the hit at the projecting end of the pot container.

Further, in the invention according to claim 13, a glass lid is provided by providing a ventilation passage (recess) at a contact portion between a removable pot container made of ceramics and a glass lid to release vapor pressure. The purpose is to prevent simmering and the like collected at the contact point between the pot and the pot container from splashing.

[0018]

The invention according to claim 1 is
A lid made of glass, a removable pot container made of ceramics provided with a ferromagnetic material on the outer side, a support container made of a heat-resistant material for surrounding and supporting the pot container from the outside, and a side of the support container By providing the electromagnetic induction coils disposed at the bottom and the bottom, means for heating the pot container itself is provided.

According to a second aspect of the present invention, by providing temperature detecting means for detecting the temperature of the food in a removable pot container made of ceramics provided with a ferromagnetic material, the input power at the time of start-up and after the start-up is supplied. It can be switched.

According to the third aspect of the present invention, upon detection of the temperature of the temperature detecting means, the energization of the electromagnetic induction coil is controlled, and at the time of start-up, a high power of a level which cannot be realized in the conventional example is applied, and after the start-up. By applying low power suitable for simmering steeply, it is possible to greatly reduce the cooking time and at the same time make simmering steep cooking without causing failure due to collapse or the like.

According to a fourth aspect of the present invention, a non-magnetic heat receiving body is provided in a removable pot container made of ceramics provided with a ferromagnetic body so that the magnetic flux leaked from the induction heating coil is picked up and the heat receiving body itself is provided. The problem of heat generation can be solved.

According to a fifth aspect of the present invention, the temperature of the cooked food can be accurately detected without being affected by fluctuations in the power supply voltage, room temperature, etc. by providing the temperature detecting element in contact with the heat receiving body made of a non-magnetic material. Is.

According to a sixth aspect of the present invention, a non-magnetic temperature detecting element such as a thermistor is attached to a non-magnetic holding body to pick up a leakage magnetic flux from an induction heating coil to generate heat. It can be resolved.

According to a seventh aspect of the present invention, by providing an urging means for urging the temperature detecting element to the heat receiving body, the variation of the contact state due to the dimensional variation of the component parts such as the pot container is always kept constant, and the cooked food is kept. The temperature of can be accurately detected.

According to the eighth aspect of the present invention, since the heat receiving body is a metal body made of aluminum alloy, it is possible to satisfy not only the non-magnetic body but also the good heat conductor and the low cost. It is possible.

According to the ninth aspect of the invention, boiling is achieved by attaching a heat receiving body through a heat resistant sealant to a through hole provided at the bottom of a removable pot container made of ceramics provided with a ferromagnetic material. It ensures the prevention of leakage and enhances reliability.

According to the tenth aspect of the present invention, the electromagnetic induction coil is molded into a support container by a heat-resistant plastic material such as polyphenylene sulfide resin, whereby the coil arrangement retention and the heat resistance are simultaneously minimized. This is made possible by the number of parts.

According to the invention of claim 11, a non-adhesive resin such as a fluororesin is applied to the aluminum alloy metal body of the heat receiving body to prevent sticking of the cooked food and the like, thereby deteriorating the detection performance of the cooked food temperature. Is to eliminate.

According to a twelfth aspect of the present invention, the outer ends of the magnetic and non-magnetic heat-receiving bodies at the bottom of the pot container made of ceramics are more than the protruding end of the pot container made of ceramic provided with a ferromagnetic material. When the pot container is removed by placing it inside and placed in the kitchen, etc., the protruding end of the pot container receives the hit and the outside of the magnetic body and non-magnetic heat receiving body on the bottom of the pot container Special external force does not act on the ends.

According to the thirteenth aspect of the present invention, the vapor pressure is released by providing a ventilation passage (recess) in the portion of the pot container where the removable pot container made of ceramics and the glass lid come into contact. This is to prevent the boiling and the like accumulated at the contact point between the lid and the pan container from splashing.

[0031]

According to a first aspect of the present invention, a removable pot container made of ceramics having a ferromagnetic material on an outer portion thereof, and a support container made of a heat resistant material for surrounding and supporting the pot container from the outside, Since the electromagnetic induction coils are provided on the side and bottom of the support container, the ferromagnetic material provided in the pan container, that is, the pan container itself, self-heats by the electromagnetic induction action.

Further, the invention according to claim 2 is provided with temperature detecting means for detecting the temperature of the cooked food in the detachable pot container made of ceramics provided with the ferromagnetic material, and therefore, at the time of starting and after rising. The timing of switching the input power is made accurate.

Further, according to the third aspect of the present invention, since the energization of the electromagnetic induction coil is controlled in response to the temperature detection of the temperature detecting means, at the time of start-up, a high level which cannot be realized in the conventional example is obtained. Power is applied and low power suitable for stewing after starting is drastically shortened, and cooking time is greatly shortened by shortening the start-up time, and at the same time after start-up, the steepness is stewed due to low power. It is intended to prevent collapse and the like.

Further, according to the invention of claim 4, since the non-magnetic heat receiving body is provided in the detachable pot container made of ceramics provided with the ferromagnetic body, the leakage magnetic flux from the induction heating coil is collected. The problem that the heat receiving body itself generates heat due to the electromagnetic induction action does not occur.

Further, according to the fifth aspect of the invention, since the temperature detecting element that comes into contact with the heat receiving body made of a non-magnetic material is provided, the temperature in the vicinity of the temperature detecting element changes due to fluctuations (disturbance) in the power supply voltage, room temperature, etc. In addition, the temperature of the cooked product can be accurately detected without being affected by the disturbance due to the temperature of the directly contacting place.

According to the sixth aspect of the invention, since the nonmagnetic temperature detecting element such as the thermistor is attached to the nonmagnetic holding body, the leakage flux from the induction heating coil is picked up and the holding body or the temperature detecting element itself is detected. It is possible to solve the problem that the temperature of cooked food cannot be detected accurately by detecting the temperature of self-heating.

Further, the invention according to claim 7 is provided with an urging means for urging the temperature detecting element to the heat receiving body, so that the variation of the contact state due to the dimensional variation of the components such as the pan container is absorbed and always kept constant. The temperature of the cooked food is accurately detected.

Further, in the invention of claim 8, since the heat receiving body is a metal body made of aluminum alloy, it is a non-magnetic body and at the same time a good heat conductor, so that self-heating due to the action of leakage magnetic flux from the induction heating coil. The time delay of heat conduction is eliminated.

Further, according to the invention of claim 9, the heat receiving body is attached to the through hole provided at the bottom of the removable pot container made of ceramics provided with the ferromagnetic material through the heat resistant sealant, so that the pot container is The gap with the heat receiving body is sealed to prevent leakage such as boiling.

According to the tenth aspect of the invention, since the electromagnetic induction coil is molded with a heat-resistant plastic material such as polyphenylene sulfide resin,
The coil array can be held as an integral part as a supporting container without causing an increase in the number of parts, and since it has heat resistance, it can sufficiently withstand the high temperature caused by the heat generation due to the electromagnetic induction action of the ferromagnetic material.

According to the eleventh aspect of the present invention, since the non-adhesive resin such as a fluororesin is applied to the aluminum alloy metal body of the heat receiving body, sticking of the cooked material is prevented, so that the boundary surface between the cooked material and the heat receiving body is prevented. The heat transfer coefficient of is kept constant.

According to a twelfth aspect of the present invention, the pot pot made of ceramics is provided in which the magnetic material at the bottom of the pot container made of ceramic and the heat receiving body made of non-magnetic material are provided with a ferromagnetic material at the outer ends thereof. Since it is located inside the end, when the pot container is removed and placed in the kitchen, etc., it will be hit by the protruding end of the pot container,
No external force acts on the outer ends of the ferromagnetic and non-magnetic heat receivers on the bottom of the pot container, preventing functional damage due to damage.

Further, in the invention according to claim 13, since the ventilation passage (recess) is provided in the portion of the pot container where the detachable pot container made of ceramics and the glass lid come into contact, vapor pressure escapes, When the lid is lifted due to an increase in vapor pressure, the steam that intermittently blows out from the gap created between the lid and the pan container causes the boiling water to collect at the contact point between the lid and the pan container, and scatters. To prevent this.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a glass lid,
It is placed on top of a pottery or porcelain or pot pot 2 made of porcelain to cover the food. The pot container 2 is provided with a ferromagnetic body 3 on the side surface and bottom surface of its outer portion, and is detachably attached to and supported by a support container 4. The support container 4 is made of a heat-resistant plastic material such as polyphenylene sulfide resin, and is formed by molding the electromagnetic induction coil 5. Reference numeral 6 denotes a temperature detecting means, which is basically composed of a heat receiving body 7 and a temperature detecting element 8. The heat receiving body 7 is made of an aluminum alloy metal body which is a non-magnetic body and a good heat conductor.
The pan container 2 is attached to the through hole 9 provided at the bottom of the pan container 2 with a heat-resistant sealing material 10 such as a silicone resin interposed therebetween, and the temperature detecting element 8 is a non-magnetic thermistor which is a metal plate made of aluminum alloy or heat-resistant. It is held by a holder 11 made of a non-magnetic material such as a flexible resin. The holder 11 is the support container 4
It is urged by the urging means 13 so as to protrude from the opening 12 and always come into contact with the heat receiving body 7. The heat receiving body 7 is provided with a non-adhesive resin 14 such as a fluororesin. On the other hand, a projecting end 15 is provided at the bottom of the pan container 2 and the heat receiving body 7
The outer end 16 and the bottom of the pot container 2 are formed so that the ferromagnetic bodies 3 are located inside. Further, a ventilation passage (recess) 17 is provided in the upper portion of the pot container 2 where it comes into contact with the lid 1 made of glass so that the vapor pressure in the pot container 2 can be released even if the cooking material starts to boil. ing.

[0046]

As described above, according to the first aspect of the invention, a removable pot container made of ceramics having a ferromagnetic material on the outer side, and a heat resistance for enclosing and supporting the pot container from the outside. Since the supporting container made of material and the electromagnetic induction coils arranged on the side and bottom of the supporting container are provided, the ferromagnetic material provided in the pan container by the electromagnetic induction action, that is, substantially the entire part of the pan container itself is self-heated. As a result, the heat transfer coefficient is dramatically improved, and the rise time can be greatly shortened.

Further, the invention according to claim 2 is provided with temperature detecting means for detecting the temperature of the cooked food in the removable pot container made of ceramics provided with the ferromagnetic material, and therefore, at the time of starting and after rising. The timing of switching the input power is realized without error.

Further, according to the third aspect of the present invention, since the energization to the electromagnetic induction coil is controlled by detecting the temperature of the temperature detecting means, at the time of start-up, a high power of a level which cannot be realized by the conventional example is provided. And, after starting, low power suitable for steeping simmering can be added to adjust the power, and the cooking time can be drastically shortened by shortening the start-up time, and at the same time simmering can be stewed after rising. It prevents simmering.

Further, according to the invention of claim 4, since the non-magnetic heat receiving body is provided in the removable pot container made of ceramics provided with the ferromagnetic body, the leakage magnetic flux from the induction heating coil is picked up and the electromagnetic flux is collected. This solves the problem that the heat receiving body itself generates heat due to the induction action.

According to the fifth aspect of the invention, since the temperature detecting element is brought into contact with the heat receiving body made of a non-magnetic material, the temperature in the vicinity of the temperature detecting element fluctuates due to fluctuations (disturbance) in the power supply voltage, room temperature and the like. In addition, the temperature of the cooked product can be accurately detected without being affected by the external disturbance because it is controlled by the temperature of the directly contacting place.

According to the sixth aspect of the present invention, since a non-magnetic temperature detecting element such as a thermistor is attached to the non-magnetic holding body, the leakage magnetic flux from the induction heating coil is picked up to detect the holding body or the temperature detecting element itself. It is possible to solve the problem that the temperature of the cooked food cannot be accurately detected by detecting the temperature rise due to self-heating.

Further, the invention according to claim 7 is provided with the urging means for urging the temperature detecting element toward the heat receiving body, so that the variation of the contact state due to the dimensional variation of the components such as the pan container is absorbed and always kept constant. It keeps and detects the temperature of the cooked food accurately without variation.

Further, in the invention of claim 8, since the heat receiving body is a metal body made of aluminum alloy, it is a non-magnetic body and at the same time a good heat conductor, so that self-heating due to the action of leakage magnetic flux from the induction heating coil and It eliminates the time delay of heat conduction.

Further, in the invention according to claim 9, since the heat receiving body is attached to the through hole provided at the bottom of the removable pot container made of ceramics provided with the ferromagnetic material through the heat resistant sealant, The gap between the heat receiving body and the seal is sealed to prevent leakage such as boiling.

According to the tenth aspect of the invention, since the electromagnetic induction coil is molded with a heat-resistant plastic material such as polyphenylene sulfide resin,
The coil array can be held as an integral part as a supporting container without increasing the number of parts, and since it has heat resistance, it can sufficiently withstand the high temperature caused by the heat generated by the electromagnetic induction of the ferromagnetic material, which is extremely cost effective It becomes.

In the eleventh aspect of the present invention, since the non-adhesive resin such as a fluororesin is applied to the aluminum alloy metal body of the heat receiving body, the cooked food and the heat receiving body are prevented from sticking to each other. It keeps the heat transfer coefficient of the boundary surface constant without deteriorating and stabilizes the quality of cooking.

According to the twelfth aspect of the present invention, the protrusion of the pot container made of ceramics in which the magnetic material at the bottom of the pot container made of ceramics and the outer end of the heat receiving body made of non-magnetic material are provided with ferromagnetic substances Since it is located inside the end, when the pan container is removed and placed in the kitchen, etc., it will be hit by the protruding end of the pan container, so the bottom part of the pan container is made of magnetic and non-magnetic heat No special external force acts on the outer end of the body, eliminating functional damage due to contact damage.

Further, in the invention according to claim 13, since the vent passage (recess) is provided in the portion of the pot container where the detachable pot container made of ceramics and the glass lid come into contact with each other, the vapor pressure is reduced. When the steam escapes and the steam is intermittently blown out from the gap created between the lid and the pot container that rises due to the rise in steam pressure, the boiling water that collects at the contact point between the lid and the pot container is scattered. It can be prevented and cooked extremely safely.

[Brief description of drawings]

FIG. 1 is a detailed sectional view of an electric cooker showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional electric cooker

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Pot container 3 Ferromagnetic body 4 Support container 5 Electromagnetic induction coil 6 Temperature detection means 7 Heat receiving body 8 Temperature detection element 9 Through hole 10 Seal material 11 Holding body 12 Opening portion 13 Energizing means 14 Non-adhesive resin 15 Projection End 16 Outer end 17 Ventilation path (recess)

Claims (13)

[Claims] 1. A lid made of glass, a removable pot container made of ceramics such as pottery or porcelain provided with a ferromagnetic material on the outer side, and a heat-resistant material for enclosing and supporting the pot container from the outside. An electric simmer cooker comprising a support container and electromagnetic induction coils arranged on the side and bottom of the support container. 2. The electric simmer cooker according to claim 1, further comprising temperature detecting means for detecting the temperature of the food in a removable pot container made of ceramics provided with a ferromagnetic material. 3. The electric stew cooker according to claim 1, wherein energization of electromagnetic induction coils disposed on the side and bottom of the support container is controlled. 4. The electric stew cooker according to claim 2, wherein a non-magnetic heat receiving body is provided in a removable pot container made of ceramics provided with a ferromagnetic material. 5. The electric cooker according to claim 2, further comprising a non-magnetic temperature detecting element that comes into contact with the heat receiving body made of a non-magnetic material. 6. The electric cooker according to claim 5, wherein a temperature detecting element having a thermistor is attached to a non-magnetic holding body. 7. The electric cooker according to claim 5, further comprising an urging means for urging the temperature detecting element toward the heat receiving body. 8. The electric stew cooker according to claim 4, wherein the heat receiving body is a metal body made of an aluminum alloy. 9. The electric simmer cooker according to claim 4, wherein a heat receiving body is attached to a through hole provided at the bottom of a removable pot container made of ceramics provided with a ferromagnetic material via a heat resistant sealant. 10. The electric cooker according to claim 1, further comprising a support container formed by molding an electromagnetic induction coil with a heat-resistant plastic material such as polyphenylene sulfide resin. 11. The electric cooker according to claim 8, wherein a non-adhesive resin such as a fluororesin is applied to the aluminum alloy metal body of the heat receiving body. 12. The electric simmering cooking according to claim 1, wherein the outer ends of the ferromagnetic material and the non-magnetic heat receiving material at the bottom of the pot container made of ceramics are located inside the protruding end of the pot container. vessel. 13. The electric stew cooker according to claim 1, wherein a vent passage (recess) is provided at a contact point between a removable pot container made of ceramics and a glass lid.