JPH08185962A - Induction heating cooker - Google Patents

Abstract

PURPOSE: To display a high temperature during a period where a placing part has a high temperature even when the connection of a power source is cut by a user at the end of use, and protect the user from the danger of being burned. CONSTITUTION: A display means 19 is driven by the power stored by a battery storing means 16 during current-carrying to display the temperature or temperature state of a placing part 17. Thus, this induction heating cooker has a function capable of display the temperature to a user even when the user removes a cooking vessel 18 such as a pan when cooking is finished to cut the connection of a power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker used in general households.

[0002]

2. Description of the Related Art FIG. 7 shows a cross-sectional view of a general induction heating cooker in the prior art. The induction heating cooker shown in FIG. 7 has a heating coil 1 and a heating coil 1 having a frequency of 20 kHz.
Inverter 2 that supplies high frequency current of 50 kHz
And a power source 3 connected to a detachable power cord 4 for supplying electric power to an inverter 2 and a cooking device 5 such as a pot located above the heating coil 1 (hereinafter simply referred to as cooking device 5)
It has a placing part 6 on which the can be placed.

With the above configuration, when the user places the cooking utensil 5 containing the food on the placing portion 6 and connects the power source 3, the inverter 2 starts to operate and the heating coil 1 causes the high frequency magnetic field. Start to occur. The cooking device 5 electromagnetically coupled to the heating coil 1 receives a high-frequency magnetic field generated by the heating coil 1 and generates a high-frequency eddy current at the bottom to generate heat. Due to this heat generation, the cooking of the food contained in the cooking device 5 proceeds.

[0004]

The induction heating cooker is a highly safe cooker that does not use fire during use.
It has become popular. However, immediately after use, the placing portion 6 is also high in temperature due to the conduction heat from the cooking utensil 5 which is high in temperature. For this reason, when the cooking utensil 5 is removed, the mounting portion 6 that is at a high temperature is exposed. Further, some conventional induction heating cookers have a configuration that displays that the placing portion 6 is in a high temperature state while the power source 3 is connected. If the cord is removed and the power supply 3 is disconnected, the display will not be displayed either.

That is, the induction heating cooker having the conventional structure has a risk of being burned if the user accidentally touches the high temperature part with the hand immediately after use.

The present invention solves such a problem. Even if the user disconnects the power source, the high temperature is displayed during the period when the mounting portion is at high temperature to protect the user from the risk of burns. The first object is to provide an induction heating cooker that can be used. Moreover, it is the 2nd-6th objective to provide the 2nd-6th means for achieving the said 1st objective.

[0007]

The first means for achieving the first object of the present invention is to provide a heating coil, an inverter for supplying a high frequency current to the heating coil, and a cooking vessel arranged above the heating coil. A mounting unit for mounting, a detachable power cord, a power storage unit for charging electric power when the power source is connected, and a display unit for displaying the temperature or temperature state of the mounting unit, the display unit storing electricity. An induction heating cooker driven by means.

A second means of the present invention for achieving the second object is, in particular, an induction heating cooker in which the electric storage means is constituted by an electric double layer capacitor.

A third means of the present invention for achieving the third object is to mount a heating coil, an inverter for supplying a high-frequency current to the heating coil, and a cooking container arranged above the heating coil. Placement part, temperature detection means for detecting the temperature of the placement part, detachable power cord, power storage means for charging electric power when the power supply is connected, and display for displaying the temperature or temperature state of the placement part The display means is an induction heating cooker driven by the power storage means when the output of the temperature detection means is equal to or higher than a predetermined value.

A fourth means of the present invention for attaining the fourth object is to mount a heating coil, an inverter for supplying a high frequency current to the heating coil, and a cooking container placed above the heating coil. A storage unit, a temperature detection unit that detects the temperature of the mounting unit, a detachable power cord, a power storage unit configured by an electric double layer capacitor that charges electric power when the power source is connected, and a temperature of the mounting unit or Display means for displaying the temperature state is provided, and the display means is an induction heating cooker driven by the power storage means when the output of the temperature detection means is equal to or higher than a predetermined value.

Further, a fifth means of the present invention for achieving the fifth object is to mount a heating coil, an inverter for supplying a high frequency current to the heating coil, and a cooking container arranged above the heating coil. A mounting portion, a detachable power cord, and display means for displaying a temperature or a temperature state of the mounting portion after the inverter has stopped driving,
An induction heating cooker, comprising: an operation section operated by a user, wherein the operation unit is operated by the user to stop the display by the display means.

A sixth means of the present invention for achieving the sixth object is to provide a heating coil, a placing portion for placing a cooking container placed above the heating coil, and an upper portion of the placing portion. The induction heating cooker is provided with a detachable cover for covering.

[0013]

According to the first means of the present invention, the display means is driven by the electric power stored in the power storage means during energization so as to display the temperature or temperature state of the placing portion, and when the user finishes cooking. It functions as an induction heating cooker that can display the temperature to the user even when the cooking container such as a pot is removed and the power supply is disconnected.

Further, according to the second means of the present invention, since the electric storage means is an electric double layer capacitor, the time for which the display means continues to operate after disconnecting the power supply can be made substantially constant, and the electric storage means It functions as an induction heating cooker with little deterioration.

According to a third means of the present invention, when the temperature of the placing portion detected by the temperature detecting means is equal to or higher than a predetermined value, the electric power from the storage means is displayed, and the placing portion conducts heat from the pot. During the period when the temperature is high, it functions as an induction heating cooker capable of displaying reliably.

A fourth means of the present invention uses an electric storage means composed of an electric double layer capacitor, and uses electric power from the electric storage means when the temperature of the mounting portion detected by the temperature detection means is equal to or higher than a predetermined value. As described above, the function of the induction heating cooker can be surely displayed during the period when the placing part is at a high temperature due to heat conduction of the pan.

The fifth means of the present invention is that the display of the display means can be stopped by the user operating the operation section,
It serves as an induction heating cooker capable of saving the electric power of the power storage means.

The sixth means of the present invention is that the user puts on the lid immediately after use, so that the placing section cannot be touched while the placing section is hot. It works as an induction heating cooker.

[0019]

EXAMPLES Examples of the first means of the present invention will be described below.
It will be described with reference to FIG. FIG. 1 is a block diagram showing an induction heating cooker of this embodiment. The heating coil 11 is for generating a high frequency magnetic field by the high frequency current received from the inverter 12. The inverter 12 is the heating coil 1
1 is supplied with a high frequency current of 20 to 50 kilohertz. The power source 13 is detachably connected to the inverter 12 and the power storage means 16 by a power cord 15 provided on the main body 14. The placing portion 17 on which the cooking container 18 such as a pot is placed is arranged above the heating coil 11. Further, on the upper surface of the main body 14, a display unit 19 for displaying the temperature or temperature state of the mounting portion 17 is provided. The display means 19 is connected to the electricity storage means 16, and the electricity storage means 16 is driven by the charging power supplied from the power source 13.

The operation of this embodiment will be described below. When the cooking container 18 containing the cooking product is placed on the placing portion 15 and the power source 13 is connected by the power cord 15, the inverter 12 starts operating. When the inverter 12 starts to operate, the heating coil 11 has 20 kHz to 5 kHz.
A high frequency current of 0 kilohertz is supplied. Therefore, the heating coil 11 generates a high frequency magnetic field of 20 to 50 kilohertz. When this high-frequency magnetic field interlinks with the cooking container 18, a high-frequency eddy current flows at the bottom of the cooking container 18. The eddy current causes the cooking container itself to generate heat, and the cooking of the contained food proceeds. As the cooking progresses, the cooking container 18
The temperature of the placing portion 17 on which the is placed rises due to the conduction heat and the radiant heat from the cooking container 18. This placing part 1
The temperature of 7 is displayed by the display unit 19. The display by the display means 19 is executed by the charging power of the power storage means 16 as described above, and is continuously executed while the power charged in the power storage means 16 is a certain value or more. It is something.

In other words, even when the user disconnects the power cord 15 from the main body 14 and disconnects the power source 13 at the end of cooking, the electric power stored in the storage means 16 continues to be a predetermined value or more. The display is what will be executed.
Therefore, even if the user removes the cooking container 18, this display continues for a while, so that the user can recognize that the placing part 17 is hot. The power storage means 16
When the accumulated power of the display means 19 is used by the display means 19 and becomes a predetermined value or less, the display on the display means 19 disappears, but at this point the temperature of the mounting portion 15 has dropped. is there.

Further, in the present embodiment, the display on the display means 19 is the temperature of the mounting portion 17, but there is no problem in qualitative expression such as high temperature danger.

As described above, according to the present embodiment, since the display means 19 is driven by the power storage means 16, the user can recognize that the temperature of the mounting portion 17 is high, and the burn injury can be caused. There is little risk of being injured.

Next, an embodiment of the second means of the present invention will be described with reference to FIG. In this embodiment, the storage means 2
No. 0 uses the electric double layer capacitor 20a.

The operation of this embodiment will be described below. In this embodiment, the electric storage means 20 is used as the electric double layer capacitor 20a.
Since the above is used, the following effects are produced. That is, between the electric energy E accumulated in the electric double layer capacitor 20a and the terminal voltage V, E = C × V
^It has a relationship of 2/2. That is,
The stored energy E is determined fairly accurately by the terminal voltage V across the storage means 20. Therefore, by designing the value of the electrostatic capacity of the electric double layer capacitor 20a constituting the power storage means 20 to be an appropriate value, the user disconnects the power cord 15 from the main body 14 at the end of use to connect the power source 13. When turned off, the temperature display means 19 continues to operate for a substantially constant time. That is, the display can be continued until the temperature of the mounting portion 17 drops to a substantially constant value.

The electric double layer capacitor 20a does not involve an electrochemical reaction during charging and discharging, unlike a general battery. Therefore, even if the number of times of charge and discharge increases, the deterioration is small, and it can be expected to operate as an element having high durability or reliability.

Next, an embodiment of the third means of the present invention will be described with reference to FIG. In this embodiment, the main body 14
A temperature detecting means 26 constituted by a thermistor for detecting the temperature of the mounting portion 17 is provided therein. Also, the power storage means 2
The reference numeral 5 drives the display means 19 when the temperature detected by the temperature detection means 26 is equal to or higher than a predetermined value.

The operation of this embodiment will be described below. As described above, in the present embodiment, the temperature detecting means 26 detects the temperature of the mounting portion 17. This temperature information is transmitted to the power storage means 25, and the power storage means 25 supplies electric power to the display means 19 and drives the display means 19 while the temperature is equal to or higher than a predetermined value.

Therefore, according to the present embodiment, when the temperature of the placing portion 17 becomes a substantially constant value even if the type of cooking container 18 differs depending on the type of cooking or the amount of cooking such as stewed foods, tempura, teppanyaki, etc. The display means 19 can be driven up to, and the fact that the placing portion 17 is at a high temperature can be continuously displayed.

Next, an embodiment of the fourth means of the present invention will be described with reference to FIG. In this embodiment, the electricity storage means 20 is composed of the electric double layer capacitor 20a, and the temperature detection means 26 for detecting the temperature of the mounting portion 17 is provided in the main body 14.

The operation of this embodiment will be described below. The temperature detecting means 26 detects the temperature of the mounting portion 17 and transmits this temperature information to the power storage means 20, and the power storage means 20 continues to drive the display means 19 while the temperature is equal to or higher than a predetermined value. There is. Therefore, the display means 19 continuously displays the high temperature while the temperature of the mounting portion 17 is equal to or higher than the predetermined temperature.

At this time, the electric double layer capacitor 20a constituting the electricity storage means 20 has a large variation in electrostatic capacitance due to changes over time and variations in manufacturing. In this regard, according to the present embodiment, the power storage means 20 is used while the temperature of the mounting portion 17 is equal to or higher than the predetermined value by using the temperature information of the temperature detection means 26.
Since it keeps operating, it is possible to prevent the influence of this variation in electrostatic capacitance. On the contrary, since the operation of the electric double layer capacitor 20a becomes large even if the change with time is large to some extent, it can be used even if the purity of the electrode material such as carbon or the binder material of the electric double layer capacitor 20a is low to some extent. Therefore, it is possible to reduce the cost of the electric double layer capacitor 20a.

Next, an embodiment of the fifth means of the present invention will be described with reference to FIG. In this embodiment, the operation unit 30 is provided on the front surface of the main body 14. The operation unit 30 is configured by a push button switch, and when the user performs a push operation, the display operation of the display unit 19 is stopped regardless of the stored energy of the power storage unit 28.

The operation of this embodiment will be described below. Even when the user disconnects the power cord 15 from the main body 14 and disconnects the power source 13 at the end of cooking, the display means 19
Keeps displaying the high temperature of the mounting part 17 by the stored power of the power storage means 28. At this time, in this embodiment, the operation unit 30 is provided on the front surface of the main body 14. Therefore, the display unit 19 stops the display when the user presses the operation unit 30 when the display by the display unit 19 is no longer necessary. That is, according to this embodiment, the display by the display means 19 can be controlled by the user. Further, it is possible to prevent the consumption of energy for performing unnecessary display.

In the present embodiment, the display means 19 is driven by the power stored in the power storage means 28. However, the display means 19 is directly driven by the power supply 13 so that the display is stopped by the operation unit 30 as well. However, there is no problem.

Next, an embodiment of the sixth means of the present invention will be described with reference to FIG. In this embodiment, the mounting unit 1
A detachable lid 35 is provided to cover the upper part of 7. In this embodiment, the lid 35 is made of resin, and has a shape having a gap of 7 mm or more at the center with the mounting portion 17 when set.

The operation of this embodiment will be described below. When the cooking is completed, the user removes the cooking container 18 and sets the lid 35 on the placing portion 17. As a result of the experiments conducted by the inventors, if the lid 35 is shaped so as to be opened 7 mm or more from the surface of the mounting portion 17, the temperature of the surface of the lid 35 is in the normal temperature range even if the temperature of the mounting portion 17 is high. It is a thing.

Therefore, according to the present embodiment, it is possible to realize a safe induction heating cooker with no possibility of being burned. Further, dust is not directly put on the placing portion 17 during storage of the induction heating cooker, and a hygienic cooking environment can be provided.

[0039]

The first means of the present invention is a heating coil,
An inverter that supplies a high-frequency current to the heating coil, and a placing unit that places the cooking container placed above the heating coil,
A detachable power cord, a power storage unit that charges electric power when the power source is connected, and a display unit that displays the temperature or temperature state of the mounting portion, and the display unit is driven by the power storage unit. The present invention realizes an induction heating cooker capable of protecting the user from the risk of burns by displaying the high temperature during the period when the placing part is still hot even if the user disconnects the power supply.

The second means of the present invention has a higher durability or reliability than that using a storage battery by an ordinary electrochemical reaction, and in particular, the electric storage means is constituted by an electric double layer capacitor. By designing the capacitance of the multi-layer capacitor to be an appropriate size, an induction heating cooker can be realized in which the display by the display means can be continued until the temperature of the mounting portion drops to room temperature.

A third means of the present invention is a heating coil, an inverter for supplying a high frequency current to the heating coil,
A placing part for placing the cooking container placed above the heating coil, a temperature detecting means for detecting the temperature of the placing part, a detachable power cord, and a storage means for charging electric power when the power source is connected. A display unit for displaying the temperature or temperature state of the mounting unit, wherein the display unit is configured to be driven by the power storage unit when the output of the temperature detection unit is equal to or more than a predetermined value. It is possible to realize an induction heating cooker that can display the temperature accurately and can be displayed accurately without being affected by the type and amount of cooking, room temperature, and the like.

A fourth means of the present invention is to provide a heating coil, an inverter for supplying a high-frequency current to the heating coil, a placing section for placing a cooking container placed above the heating coil, and a temperature of the placing section. A temperature detecting means for detecting the temperature, a detachable power cord, an electric storage means configured by an electric double layer capacitor for charging electric power when the power source is connected, and a display means for displaying the temperature or temperature state of the mounting portion. The display means is configured to be driven by the power storage means when the output of the temperature detection means is equal to or more than a predetermined value, and an accurate display capable of guaranteeing variations in the capacitance of the electric double layer capacitor can be provided. It realizes a heating cooker.

A fifth means of the present invention is a heating coil, an inverter for supplying a high frequency current to the heating coil,
A placing part for placing the cooking container placed above the heating coil, a detachable power cord, and a display means for displaying the temperature or temperature state of the placing part after the inverter stops driving. And a configuration in which the user operates the operation unit, and the display is stopped by the display unit when the user operates the operation unit, and the continuation of the display can be controlled by the user's intention, resulting in unnecessary power consumption. It is intended to realize a non-induction heating cooker.

Further, the sixth means of the present invention comprises a heating coil, a placing portion for placing the cooking container placed above the heating coil, and a removable lid for covering the upper portion of the placing portion. As a configuration, it is possible to cover the placing part that has become hot with a lid,
It realizes a safe induction heating cooker.

[Brief description of drawings]

FIG. 1 is a block diagram of an induction heating cooker that is an embodiment of the first means of the present invention.

FIG. 2 is a block diagram of an induction heating cooker that is an embodiment of the second means of the present invention.

FIG. 3 is a block diagram of an induction heating cooker that is an embodiment of the third means of the present invention.

FIG. 4 is a block diagram of an induction heating cooker that is an embodiment of the fourth means of the present invention.

FIG. 5 is a block diagram of an induction heating cooker that is an embodiment of the fifth means of the present invention.

FIG. 6 is a block diagram of an induction heating cooker that is an embodiment of the sixth means of the present invention.

FIG. 7 is a block diagram of a conventional induction heating cooker.

[Explanation of symbols]

 11 Heating Coil 12 Inverter 13 Power Supply 14 Main Body 15 Power Cord 16 Storage Means 17 Placement Part 18 Cooking Container 19 Display Means 20 Electric Storage Means 20a Electric Double Layer Capacitor 25 Electric Storage Means 26 Temperature Detection Means 28 Electric Storage Means 30 Operation Part 35 Lid

Claims (6)

[Claims] 1. A heating coil, an inverter for supplying a high-frequency current to the heating coil, a placing section for placing a cooking container placed above the heating coil, a detachable power cord, and a power source when connecting the power source. A storage means for charging electric power,
An induction heating cooker, comprising: a display unit for displaying the temperature or temperature state of the mounting portion, the display unit being driven by a power storage unit. 2. The induction heating cooker according to claim 1, wherein the storage means is an electric double layer capacitor. 3. A heating coil, an inverter for supplying a high-frequency current to the heating coil, a placing part for placing a cooking container placed above the heating coil, and a temperature detecting means for detecting the temperature of the placing part. A detachable power cord, a power storage means for charging electric power when the power source is connected, and a display means for displaying the temperature or temperature state of the mounting portion, and the display means has a predetermined output from the temperature detection means. An induction heating cooker driven by a power storage means when the value is equal to or more than a value. 4. A heating coil, an inverter for supplying a high-frequency current to the heating coil, a placing part for placing the cooking container placed above the heating coil, and a temperature detecting means for detecting the temperature of the placing part. , A detachable power cord, an electric storage means constituted by an electric double layer capacitor for charging electric power when the power source is connected, and a display means for displaying the temperature or temperature state of the mounting portion, the display means being a temperature indicator. An induction heating cooker driven by a power storage means when the output of the detection means is equal to or higher than a predetermined value. 5. A heating coil, an inverter for supplying a high-frequency current to the heating coil, a mounting portion for mounting a cooking container disposed above the heating coil, a detachable power cord, and the inverter driven. The display means for displaying the temperature or the temperature state of the mounting portion after stopping the operation and the operation portion operated by the user are provided, and the display by the display means is stopped by the operation of the operation portion by the user. Induction heating cooker. 6. An induction heating cooker comprising: a heating coil; a placing portion for placing a cooking container placed above the heating coil; and a detachable lid covering an upper portion of the placing portion.