JPH10112380A - Induction heating cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make possible the sharing of the other electric apparatus without operating an electric breaker by providing instantaneous increasing power swithcing means to reduce the maximum setting power for changing the maximum setting power. SOLUTION: When the user reduces the maximum power and perform cooking with heating, when specified operation is performed by operating means 22, the maximum power of instantaneous increasing power switching means 25 is switched to a set value, and heating starts. Controlling means 21 actuates a switching element 15 by a driving circuit 20, and a high-frequency current is applied to a heating coil 13 by turning ON/OFF the element. ON time of the switch 15 is regulated so that power supplied at this time is detected by a detection unit 18 and stabilize near a set power value. For example, when the user operates an instantaneous power increase switch 23 in a state of setting power of 600W, heating is performed by setting supply power to 1000W of the maximum setting power set before starting heating, and after certain time of period has elapsed the previous 600W is reset. Thereby, even if input power is temporarily increased, the maximum power is reduced to the set power value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction cooking device.

[0002]

2. Description of the Related Art In recent years, induction heating cookers have been widely used in general homes and business use due to their excellent features of safety, cleanliness and high efficiency.

A conventional induction heating cooker will be described below. FIG. 3 is a block diagram of a conventional induction heating cooker. In FIG. 3, reference numeral 51 denotes an AC power supply, and 52 denotes an AC power supply 51.
Rectifier circuit for converting DC to DC, 53 is a heating coil for heating the load, 54 is a resonance capacitor, 55 is a switching element, 56
Is the reverse conducting diode, the heating coil 53 and the resonance capacitor
An inverter circuit 57 is composed of 54, a switching element 55, and a reverse conducting diode 56. 58 is an input power detection unit that detects the input power from the AC power supply 51, 59 is an input power setting unit that sets the power supplied to the load, 60 is a drive circuit that drives the switching element 55, and 61 is an input power detection unit. 58
Control means for controlling the ON time of the switching element 55 so that the detected power becomes the power set by the input power setting section 59; 62, an operation means for inputting each command; and 63, an operation means 62. The instantaneous power increasing switch 64 is an instantaneous power increasing means for increasing the input power from the AC power supply 51 so as to reach the maximum power for a predetermined time in response to a signal from the instantaneous power increasing switch.

In the induction heating cooker of the conventional configuration configured as described above, when heating is started by an input signal from the operating means 62, the control means 61 turns the switching element 55 on and off, so that a high-frequency current flows through the heating coil 53. The electric power is supplied to the flow pan, which is placed above the heating coil 53. The detection of the power supplied to the load pan is performed by the input power detection unit 58, and the ON time of the switching element 55 is changed from the detection signal of the input power detection unit 58 to the power set by the input power setting unit 59. . The set power in the input power setting section 59 can be set in five steps by input from the operating means 62, but when the user wants to temporarily increase the power supplied to the load without changing the power setting during cooking Has operated the instantaneous power increase switch 64 by operating the instantaneous power increase switch 63 to control the input power to be the maximum set power for a certain period of time.

[0005]

In such a conventional induction heating cooker, high heating power is being promoted in order to improve cooking performance, and the maximum set electric power is less than the electric capacity of electric wiring. If the conventional induction heating cooker is used by sharing the electrical wiring with other electrical products, the current capacity will be exceeded if the input power is erroneously temporarily increased to the maximum set power. There was a problem that the electric breaker was operated.
In addition, when used with electric wiring having a small electric capacity, there is a problem that even if the induction heating cooker is used alone, the electric current exceeds the electric current capacity to operate the electric breaker.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an induction heating cooker in which the maximum set power can be reduced by changing a user's operation.

[0007]

In order to solve this problem, the present invention is configured to have an instantaneous increase power switching means for changing the maximum set power in the instantaneous power increase means.

[0008] This allows the user to change the maximum set power by his / her own operation. Even when the input power is temporarily increased, the maximum power is set to be less than the power set by the user. Can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An induction heating cooker according to the present invention is an induction heating unit including a heating coil for heating a load and a switching element, and an input power detection unit for detecting input power from an AC power supply. An input power setting unit that sets power to be supplied to the induction heating unit; and a control that controls the induction heating unit such that the detected power of the input power detection unit is the power set by the input power setting unit. Means, operating means, and an instantaneous power increasing means for increasing the input power from the AC power supply so as to reach a maximum set power for a predetermined time in response to an operation of an instantaneous power increasing key included in the operating means, An instantaneous power increasing means for changing the maximum set power in the instantaneous power increasing means is provided.

Thus, the user can change the maximum set power by his / her own operation, and even when the input power is temporarily increased by the instantaneous power increasing means, the power value becomes equal to or less than the power value set by the user. Thus, the maximum power can be reduced.

According to a second aspect of the present invention, there is provided an induction heating cooker comprising: an induction heating section including a heating coil for heating a load and a switching element; an input power detection section for detecting input power from an AC power supply; An input power setting unit that sets power to be supplied to the heating unit; a control unit that controls the induction heating unit so that the detected power of the input power detection unit is the power set by the input power setting unit; Means, and a second power higher than the set power for a predetermined time when the input power is set to a predetermined power or more by the input power setting unit by the operation means.
Instantaneous power increasing means for increasing the input power from the AC power supply so as to achieve the set power, and prohibiting the function of the instantaneous power increasing means or changing the second set power of the instantaneous power increasing means. The configuration has an instantaneously increased power switching means.

Thus, the user can prohibit the function of the instantaneous power increasing means by his / her operation or limit the amount of power to be increased by the instantaneous power increasing means. Even when the instantaneous power increasing means operates to temporarily increase the input power, the input power can be reduced so as to be equal to or less than the power value set by the user.

[0013]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 11 denotes an AC power supply, and 12 denotes an AC power supply.
11 is a rectifying circuit for converting to direct current, 13 is a heating coil for heating a load, 14 is a resonance capacitor, 15 is a switching element, and in this example, an IGBT is used. Reference numeral 16 denotes a reverse conducting diode, a heating coil 13, a resonance capacitor 14, and a switching element.
An inverter circuit 17 is composed of 15 and the reverse conducting diode 16. The inverter circuit is not particularly limited to the one-stone resonance type. Reference numeral 18 denotes an input power detection unit that detects input power from the AC power supply 11, and in this example, an AC power supply 11 using a current transformer.
Is converted into a voltage, input to a microcomputer, and calculated inside the microcomputer to convert it into an input power value. Reference numeral 19 denotes an input power setting unit for setting the power supplied to the load.
W, 800 W, and 1000 W are set in five stages.

Reference numeral 20 denotes a drive circuit for driving the switching element 15, and reference numeral 21 denotes control means for controlling the ON time of the switching element 15 so that the detected power of the input power detecting means 18 becomes the power set by the input power setting unit 19. , 22 is an operation means for the user to set the operation of the cooking appliance, 23 is an instantaneous power increase switch which is a part of the operation means 22, and 24 is an instantaneous power increase switch
The maximum set power is set to 1400 W by an instantaneous power increase means for increasing the input power from the AC power supply 11 so as to reach the maximum set power for a predetermined time in response to the input of 23. twenty five
Is an instantaneously increased power switching means for enabling the user to change the maximum set power in the instantaneous power increasing means 24, and 1400 W and 1
000W. In the present embodiment, the setting step of the instantaneously increased power switching means 25 is set to two steps, but is not particularly limited.

The operation of the induction cooking device configured as described above will be described. When the user performs heating cooking by reducing the maximum set power, the maximum set power is switched to 1000 W by the instantaneously increased power switching means 25 by performing a predetermined input operation from the operation means 22, and then heating is started.
When the user operates the operating means 22 to start heating, the drive circuit 20 drives the switching element 15 by a signal from the control means 21, and a high-frequency current is applied to the heating coil 13 by the on / off operation of the switching element 15 to heat the heating coil 13. Coil 13
The load pan placed above is induction-heated.

The power supplied to the load pan is a switching element.
It is possible to freely increase or decrease by changing the ON time of 15. The power supplied to the load pan is detected by the input power detection unit 18, and the control unit 21 adjusts the ON time of the switching element 15 so that the supplied power is stabilized near the power value set by the input power setting unit. Now, when the user operates the instantaneous power increase switch 23 in the input power setting unit 19 in the state of 600 W setting, the instantaneous power increase means responds to supply the power to the load pan to the maximum set power set before the start of heating. Is heated at 1000 W. Then, after a lapse of a predetermined time, for example, 2 minutes, the set power returns to the previously set state of 600 W.

As described above, according to the present embodiment, the user can change the maximum set power by his / her own operation, and even when the input power is temporarily increased by the instantaneous power increase means, the user can change the maximum set power. Can be reduced so as to be equal to or less than the set power value.

(Embodiment 2) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 31 is an AC power supply, and 32 is an AC power supply.
A rectifier circuit 31 converts DC, a heating coil 33 heats a load, a resonance capacitor 34, and a switching element 35, which is an IGBT in this example. 36 is a reverse conducting diode, a heating coil 33, a resonance capacitor 34, and a switching element.
An inverter circuit 37 is constituted by 35 and a reverse conducting diode 36. The inverter circuit is not particularly limited to the one-stone resonance type. Reference numeral 38 denotes an input power detection unit that detects input power from the AC power supply 31.
Is converted into a voltage, input to a microcomputer, and calculated inside the microcomputer to convert it into an input power value.

Reference numeral 39 denotes an input power setting unit for setting the power to be supplied to the load, and the set power is 300 W, 450 W, 600 W, 8
It is set in five stages of 00W and 1000W. 40 is a drive circuit for driving the switching element 35, 41 is control means for controlling the ON time of the switching element 35 so that the detection power of the input power detection means 38 becomes the power set by the input power setting unit 39, 42 is An operation means 43 for the user to set the operation of the cooking device, an AC power supply 43 for setting the input power to the second power higher than the predetermined power for a predetermined time when the power is set to a predetermined power or more by the input power setting unit 39. An instantaneous power increasing means for increasing the input power from 31. In this example, when the setting is 600 W or more, the set power is increased by 400 W for 2 minutes. Reference numeral 44 denotes an instantaneous increase power switching means that enables the user to change the increase value of the set power in the instantaneous power increase means 43, and the increase value can be switched between 0 W and 400 W. In this embodiment, the setting value of the increase value of the instantaneous increase power switching means 44 is set to two steps, but is not particularly limited.

The operation of the induction cooking device configured as described above will be described. When the user performs heating cooking by reducing the increased power value in the instantaneously increased power increasing means 43,
By performing a predetermined input operation from the operation means 42, the increased power value is switched to 0W. Thereafter, the user operates the operation means 42
When the operation is started to start heating, the drive circuit 40 drives the switching element 35 by a signal from the control means 41, and a high-frequency current is applied to the heating coil 33 by the on / off operation of the switching element 35, and the heating element 33 is placed above the heating coil 33. The heated loading pan is induction heated.

The power supplied to the load pan is a switching element
It is possible to freely increase or decrease by changing the ON time of 35. The power supplied to the load pan is detected by the input power detection unit 38, and the control unit 41 adjusts the ON time of the switching element 35 so that the supplied power becomes stable around the power value set by the input power setting unit. The default setting of the input power setting section 39 at the start of heating is 1000 W, so the instantaneous power increasing means 43 automatically operates, and after the start of heating,
For a minute, the heating is performed so that the power becomes the sum of the power value set by the input power setting unit 39 and the increased power value set inside the instantaneous power increasing means 43. In this example, since the increased power value is initially set to 0 W, the power supplied to the load pan at the start of heating is 10
Heat at 00W.

As described above, according to this embodiment, the user can change the increased power value by the instantaneous power increasing means by his / her own operation, and the input power is temporarily increased by the instantaneous power increasing means. In this case, the maximum power can be reduced so as to be equal to or less than the power value set by the user.

[0025]

As described above, according to the first aspect of the present invention, since the instantaneous power increasing means has the instantaneous increasing power switching means, the user can change the maximum set power, and the maximum set power can be changed. By reducing the electric power, even when the electric power is temporarily increased, the electromagnetic cooker can be used by sharing the electric wiring with another electric product without operating the electric breaker. In addition, when the electromagnetic cooker is used alone, by setting the maximum set power as large as possible, high heating power can be realized and cooking performance can be improved.

According to the second aspect of the present invention, since the instantaneous power increasing means has the instantaneous power increasing means, the user can inhibit the function of the instantaneous power increasing means or increase the function by the instantaneous power increasing means. It is possible to change the electric power value and reduce the maximum set electric power, so that even if the electric power is temporarily increased, the electric cooker is shared with other electric products without operating the electric breaker and sharing the electric wiring Can be used. Further, even when the set power at the start of heating is the maximum setting of the input power setting section and the instantaneous power increasing means is operated and the power is automatically increased for a predetermined time, the user can use the function of the instantaneous power increasing means. Prohibition of operation or changing the increased power value of the instantaneous power increasing means can prevent the operation of the electric breaker due to the excess of the electric capacity at the start of heating, and use the electromagnetic cooker with electric wiring with a small electric capacity Becomes possible. Further, the user sets the increased power value in accordance with the actual use, so that it is possible to realize a high heating power in the electric wiring having a sufficient electric capacity, thereby improving the cooking performance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an induction heating cooker according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an induction heating cooker according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a conventional induction heating cooker;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 AC power supply 12 Rectifier circuit 13 Heating coil 14 Resonant capacitor 15 Switching element 16 Reverse conduction diode 17 Inverter circuit 18 Input power detection part 19 Input power setting part 20 Drive circuit 21 Control means 22 Operating means 23 Instantaneous power increase switch 24 Instantaneous power increase Means 25 Instantaneous increase power switching means 31 AC power supply 32 Rectifier circuit 33 Heating coil 34 Resonant capacitor 35 Switching element 36 Reverse conduction diode 37 Inverter circuit 38 Input power detection unit 39 Input power setting unit 40 Drive circuit 41 Control means 42 Operating means 43 Instantaneous Power increasing means 44 Instantaneously increasing power switching means 51 AC power supply 52 Rectifier circuit 53 Heating coil 54 Resonant capacitor 55 Switching element 56 Reverse conduction diode 57 Inverter circuit 58 Input power Detecting section 59 Input power setting section 60 Drive circuit 61 Control means 62 Operating means 63 Instantaneous power increase switch 64 Instantaneous power increase means

Claims (2)

[Claims] An induction heating unit including a heating coil and a switching element; an input power detection unit configured to detect input power from an AC power supply; an input power setting unit configured to set power supplied to the induction heating unit; Control means for controlling the induction heating section so that the detected power of the input power detection section becomes the power set by the input power setting section; and a predetermined time in response to an operation of an instantaneous power increase key included in the operation means. Instantaneous power increasing means for increasing the input power from the AC power supply so that the maximum set power is obtained over a period of time. The maximum heating power of the instantaneous power increasing means can be changed by the instantaneously increasing power switching means. Cooking device. 2. An induction heating unit including a heating coil and a switching element, an input power detection unit for detecting input power from an AC power supply, an input power setting unit for setting power to be supplied to the induction heating unit, Control means for controlling the induction heating section so that the detected power of the input power detection section becomes the power set by the input power setting section, and the input power setting section is set to a predetermined power or more by the operation section by the operation means. And an instantaneous power increasing means for increasing the input power from the AC power supply to a second set power higher than the set power for a predetermined time, wherein the instantaneous power increase means switches the instantaneously increased power. An induction heating cooker whose function is prohibited by means or its second set power is changed.