JP2003100434A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker having using conveniences by enabling that this has plural output limiting patterns in order to limit the total electric power amount and that a user can select them when plural induction heating devices are employed. SOLUTION: This device is provided with induction heating devices 2 and 6, an electric power limiting means 14 to individually limit outputs of respective induction heating devices, and an electric power limit selecting means 15 to select limiting patterns of plural outputs, and the user can select the limiting patterns of the output freely, and this has the superior using conveniences.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-port induction heating cooker having a plurality of induction heating devices.

[0002]

2. Description of the Related Art Conventionally, in a multi-purpose household heating cooker having a plurality of high-output induction heating devices, it is common to use a 30A indoor wiring or a power breaker. In order to prevent the power breaker from operating when the total power amount exceeds a predetermined value, the output is limited so that the total power amount does not exceed the predetermined value. For example, in a cooking device equipped with heating means other than induction heating such as an induction heating device with a maximum output of 2000 W and two ports and a sheath heater of 1200 W, if these three ports are used at the same time, the total electric energy is 4800 W (limit since more than prospect), it has been used to limit the output of the induction heating apparatus of one item to 1600 W. Further, in that case, the output display of the induction heating device whose output is limited is kept at the maximum output. Then, when the use of other non-restricted induction heating device or heating means other than induction heating is stopped, or the output of the non-restricted induction heating device is set low again (for example, when it is set to 1600 W or less). ), The output limitation of the induction heating device whose output is limited is released, and the output is returned to 2000W.

[0003]

In the conventional multi-mouth heating cooker, the pattern of output limitation is determined in advance by the device, and it is not always suitable for various usage conditions. In addition, while the total amount of electric power is fixed, the heat source including each induction heating device is becoming higher in output in recent years, and it becomes more and more difficult to limit the output suitable for all usage conditions.

The present invention solves such a conventional problem, and provides an induction heating cooker which changes the output restriction pattern according to the actual usage of the device to suppress the deterioration of cooking performance and is easy to use. That is the purpose.

[0005]

In order to achieve the above object, an induction heating cooker of the present invention has a plurality of output limiting patterns when a plurality of induction heating devices are simultaneously turned on.

By this, the user can select the output restriction pattern according to the actual use condition, so that even when a plurality of induction heating devices are used at the same time, it is possible to suppress the deterioration of the cooking performance of each induction heating device. .

[0007]

The invention according to claim 1 includes a plurality of heating coils, an inverter circuit for driving the heating coil, and a control means for controlling the output of the heating coil in a plurality of stages by the inverter circuit. Induction heating device, operating means for individually turning on or off each of the induction heating devices or changing the output level, and when a plurality of predetermined induction heating devices are turned on, the total electric energy of the equipment is a predetermined electric energy Power limiting means having a plurality of limit patterns for limiting the output of the induction heating device in the ON state so as not to exceed the limit, and power limit selecting means for selecting the limit pattern of the induction heating device from the plurality of limit patterns. This is an induction heating cooker, and when a user selects from multiple output limiting patterns and uses multiple induction heating devices at the same time, It can have, it is possible to suppress the reduction of the cooking performance of each induction heating apparatus.

According to a second aspect of the present invention, in the configuration of the first aspect, particularly, one of the plurality of induction heating devices in the ON state, which has one of the limiting patterns of the power limiting means, is turned on first. The device is an induction heating cooker that is limited to a smaller output level and can be used without any discomfort for cooking performed later.

According to a third aspect of the invention, in the configuration of the first aspect, in particular, one of the plurality of induction heating devices in the ON state, which has one of the output limiting patterns, is smaller as the induction heating device is turned on later. This is an induction heating cooker in which the output level is limited, and the performance of the previous cooking can be maintained.

According to a fourth aspect of the present invention, in the configuration of the first aspect, one of the limiting patterns of the power limiting output is output level to the induction heating device excluding the induction heating device for which automatic cooking is selected. It is an induction heating cooker that limits the number of times, and when performing an automatic cooking menu such as rice cooking or boiling water, cooking is always performed with the output originally required, and the performance of automatic cooking is improved. There is no impact or extended cooking time.

According to a fifth aspect of the present invention, in the configuration according to any one of the first to fourth aspects, a storage means is provided,
This is an induction heating cooker that stores the restriction pattern selected by the power restriction selection means, which allows the user to remember the output restriction pattern selected by the user even when the power is turned off. It also eliminates the need to reselect.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a multi-port induction heating cooker having a two-port induction heating device including a heating coil and a general heating device such as a sheath heater in the same housing. Is a 200V commercial power source, 2 is an induction heating device 1
The heating coil 3, the inverter circuit 4 for driving the heating coil 3, and the output level (hereinafter, thermal power) of the heating coil 3 via the inverter circuit 4 are set in 6 stages (0 W, 500 W, 10 W).
00W, 1500W, 2000W, 3000W).

Similarly, 6 is an induction heating device which is connected to the commercial power source 1 through a path different from that of the induction heating device 2, and includes a heating coil 7, an inverter circuit 8 for driving the heating coil 7, and an inverter circuit 8. The heating power of the heating coil 7 in 6 stages (0
W, 500W, 1000W, 1500W, 2000W,
The control means 9 is controlled to 3000 W).

Further, 10 is a 1200 W sheath heater which is a heating means different from induction heating, 11 is a relay switch for turning on / off the sheath heater 10, 12 is a relay driving means for driving the relay switch 11, and 13 is a key switch or the like. In addition to individually turning on and off the induction heating devices 2 and 6 and the sheath heater 10 or individually changing the heating power, a switch for automatic cooking is included. Reference numeral 14 denotes a power limiting means, which receives a signal in each control state of the induction heating devices 2 and 6 and the sheath heater 10 by the operating means 13 to select one of a plurality of control patterns for limiting the power output of the induction heating devices 2 and 6. One is transmitted to each control means 5, 9. Reference numeral 15 is a power limit selection unit, which can select and determine one of the plurality of limit patterns that the power limit unit 14 has. Reference numeral 16 denotes a storage unit including a volatile or non-volatile memory or the like, which can store the power limit pattern selected by the power limit selection unit 15. 17 is a light emitting diode (LED)
Alternatively, it is a display means including a liquid crystal display element (LCD) or the like, and displays the on / off state of the induction heating device whose heating power is determined by the operating means 13, the set heating power, and the output restriction pattern selected by the power restriction selection means 15. ing.

In the induction heating cooker configured as described above, in the present embodiment, the power restriction means 14 has the following four restriction patterns. (1) Pattern 1:
Limit the output of all induction heating devices equally. (2)
Pattern 2: The output of the induction heating device that was turned on earlier is smaller than the output of the induction heating device that was turned on later. (3) Pattern 3: The output of the induction heating device that is turned on later is smaller than the output of the induction heating device that is turned on first. (4) Pattern 4: The induction heating device for which automatic cooking is selected does not limit the output, and limits the output of the other induction heating devices.

[0017] In the case of general in the indoor wiring for the 30A, the total amount of current is limited to 4800W to the prospect of about 80%. Therefore, when the induction heating devices 2 and 6 are driven and the heating power of the respective heating coils 3 and 7 is used at the maximum of 2000 W, the total electric energy is 4000 W, which is smaller than 4800 W, and the induction heating devices 2 and 6 are There is no need to limit the output of. However, either induction heating device 2 or 6
When it is set to 00 W or when the sheath heater 10 is driven, the total electric power exceeds 4800 W, and it is necessary to limit the heating power of the induction heating device 2 or 6.

Next, the operation when each output restriction pattern is selected will be described with reference to the flow charts of FIGS.

FIG. 2 shows the operation when "Pattern 1" is selected. First, in step 201, the induction heating device 2 is turned on.
Set the heat power to 000W. Next, in step 202, the induction heating device 6 is set to 2000 W of thermal power. Next, when the sheath heater 10 is driven in step 203, the power limiting means 14 sends a signal to the control means 5, 9 of the induction heating devices 2, 6 so that the heating power is 1800 W in step 204. As a result, the total amount of electric power can be limited to 4800 W, and cooking can be performed without causing a difference in thermal power between the induction heating devices.

Next, FIG. 3 shows the operation when "Pattern 2" is selected. First, in step 301, the induction heating device 2 is set to a thermal power of 2000W. Then step 302
Then, the induction heating device 6 is set to a heating power of 3000 W. As a result, the total electric power becomes 5000 W.
At 3, the power limiting means 14 sends a signal to the control means 5 of the induction heating device 2 so that the heating power becomes 1800W. Further, when the sheath heater 10 is driven in step 304, the power limiting means 14 sends a signal to the control means 5 of the induction heating device 2 in step 305 so that the heating power becomes 600 W. As a result, the induction heating device, which was turned on later, had a maximum thermal power of 300.
It can be used at 0 W, and if the induction heating device that was previously turned on is about to finish cooking, the cooking performance of all induction heating devices will not be significantly reduced.
In this embodiment, the induction heating device 6 which is turned on later does not limit the output, but the induction heating devices 2 and 6 may be limited to the thermal power of 1600 W and 2000 W, respectively.

Next, FIG. 4 shows the operation when "Pattern 3" is selected. First, in step 401, the induction heating device 2 is set to a heating power of 3000W. Next Step 402
Then, the induction heating device 6 is set to a heating power of 3000 W. As a result, the total amount of electric power becomes 6000W.
At 3, the power limiting means 14 sends a signal to the control means 9 of the induction heating device 6 so that the heating power becomes 1800W. Further, when the sheath heater 10 is driven in step 404, the power limiting means 14 sends a signal to the control means 9 of the induction heating device 6 in step 405 so that the heating power becomes 600 W. As a result, cooking can be started even with the induction heating device 6 that was turned on later, without lowering the cooking performance of the induction heating device 2 that was turned on first. In addition, in this embodiment, the induction heating device 2 which is turned on first does not limit the output, but the induction heating devices 2 and 6 may be limited to the heating power of 2000 W and 1600 W, respectively.

Finally, FIG. 5 shows the case where "pattern 4" is selected. First, in step 501, the induction heating device 2 is turned on by automatic cooking such as cooking rice. In automatic cooking, the heating power changes automatically depending on the temperature and time, so consider the maximum heating power to be used in the corresponding automatic cooking, and use that heating power as the set heating power.
In this embodiment, the heating power is 2000 W. Next step 5
In 02, the induction heating device 6 is set to a heating power of 3000 W.
As a result, the total amount of electric power becomes 5000 W, so in step 503, the electric power limiting means 14 sends a signal to the control means 5 of the induction heating device 2 so that the heating power becomes 1800 W. In addition,
In the present embodiment, the automatic cooking is turned on first, and the output of the induction heating device turned on later is limited.However, when the automatic cooking is turned on later, if the output of the induction heating device turned on first is limited. Good. This does not reduce the cooking performance when automatic cooking such as rice cooking is performed.

Since the user can select each of the output restriction patterns and display it on the display means 17, it is possible to clearly recognize how the heating power of each induction heating device is restricted.

Further, by storing the output limit pattern selected by the power limit selection unit 15 in the storage unit 16,
There is no need to select again and again. Also, the storage means 1
By using 6 as a non-volatile memory, the previous output restriction pattern can be selected at the next use even when the power is turned off.

In each operation of this embodiment, since the induction heating devices 2 and 6 have the same function, there is no problem even if they are exchanged.

[0026]

As described above, according to the present invention, when the total current of the equipment is limited, a plurality of output limiting patterns of each induction heating device are provided, and the output limiting pattern is changed depending on the actual usage. As a result, even when a plurality of induction heating devices are used at the same time, it is possible to suppress a decrease in cooking performance of each induction heating device. further,
By allowing the user to select a plurality of output restriction patterns, it is possible to provide an induction heating cooker with good usability.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing an output restriction pattern 1 of the induction heating cooker.

FIG. 3 is a flowchart showing an output restriction pattern 2 of the induction heating cooker.

FIG. 4 is a flowchart showing an output restriction pattern 3 of the induction heating cooker.

FIG. 5 is a flowchart showing an output restriction pattern 4 of the induction heating cooker.

[Explanation of symbols]

2, 6 induction heating device 3,7 heating coil 4, 8 Inverter circuit 5, 9 Control means 13 Operating means 14 Power limiting means 15 Power limit selection means 16 storage means

Claims (5)

[Claims] 1. A plurality of induction heating devices each including a heating coil, an inverter circuit for driving the heating coil, and control means for controlling the output of the heating coil in a plurality of steps by the inverter circuit, and each of the induction heating devices. Induction heating in the ON state so that the total electric energy of the equipment does not exceed the predetermined electric energy when the operating means for individually turning on and off or changing the output level and the predetermined plural induction heating devices are turned on. An induction heating cooker comprising: a power limiting means having a plurality of limiting patterns for limiting the output of the device; and a power limiting selecting means for selecting a limiting pattern of the induction heating device from the plurality of limiting patterns. 2. One of the limiting patterns of the power limiting means,
The induction heating cooker according to claim 1, wherein the induction heating device that is turned on first is limited to a smaller output level among the plurality of induction heating devices that are in the on state. 3. One of the limiting patterns of the power limiting means,
The induction heating cooker according to claim 1, wherein the induction heating device turned on later is limited to a smaller output level among the plurality of induction heating devices in the on state. 4. One of the limiting patterns of the power limiting output,
The induction cooker according to claim 1, wherein the output level is limited to an induction heating device except an induction heating device for which automatic cooking is selected. 5. The induction heating cooker according to claim 1, further comprising a storage unit for storing the restriction pattern selected by the power restriction selection unit.