JP2011009100A - Induction heating cooker - Google Patents

Abstract

An induction heating cooker capable of heating a larger pot with a high heating power at a plurality of heating positions.
In an induction heating cooker having a plurality of heating coils 50 to 52, inverter circuits 23 to 25, an operation input unit 4, a display unit 5, and a control unit 59 connected thereto, a control unit 59 controls whether heating coils 50 to 52 are individually heated or output, heating coil 50 and heating coil 52 are integrally heated, or heating coil 52 and heating coil 51 are integrally heated and output. Can do.
[Selection] Figure 2

Description

  The present invention relates to an induction heating cooker having a plurality of heating coils.

  The conventional induction heating cooker is “at least one heating coil out of the plurality of heating coils 2, 3 has a diameter different from that of the other heating coils, and the top plate 8 has a diameter of the heating coils 2, 3. There is a pan position display section of a size corresponding to each, ”even when a small pan is used, it can be efficiently heated, and there is also one that can use a normal size pan (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-186002 (first page, FIG. 1)

  However, when using a pan or pan with a diameter larger than the diameter of the heating coil provided, the heating power to heat is not enough, or the magnetic lines of force from the heating coil are linked only to a part of the pan bottom, resulting in large heating unevenness. There was a problem that occurred. Also, in order to reduce uneven heating when heating a large-diameter pan, it is necessary to have a large heating coil originally, which is not efficient and convenient in daily life when a large-diameter pan is not used. There was a problem.

  The present invention has been made in order to solve the above-described problems, and in order to heat a pot having a diameter larger than the diameter of the heating coil provided, it is possible to select a heating port having a diameter larger than that of the heating coil. At the same time, it is to obtain an induction heating cooker that suppresses uneven heating during heating.

  An induction heating cooker according to the present invention includes a plurality of heating coils, an inverter circuit that supplies a high-frequency current to each of the heating coils, an operation input unit that sets each heating output of the heating coils, and each of the heating coils. A display unit that displays a heating output state; and a control unit that receives the operation input from the operation input unit and controls the inverter circuit, and the control unit integrally heats the two or more heating coils. It has a heating output integrated mode to output.

  In the present invention, when the heating output integrated mode in which the two heating coils are integrally heated and output by the operation input unit is set by the control input unit, the control unit passes through the inverter circuit corresponding to the selected two heating coils. Control is performed so that the sum of these input powers becomes the power corresponding to the set thermal power. By controlling a plurality of heating coils as a single unit, the induction heating cooker of the present invention can heat a pan having a diameter larger than that of the provided heating coil while suppressing uneven heating.

1 is an external view of an induction heating cooker according to Embodiment 1. FIG. It is a circuit block diagram of the induction heating cooking appliance which concerns on Embodiment 1. FIG. FIG. 3 is a plan view showing shapes and arrangements of a left IH heating coil, a central IH heating coil, and a right IH heating coil according to the first embodiment. FIG. 3 is a positional relationship diagram of a heating coil and a container to be heated according to the heating mode of the first embodiment. FIG. 3 is a state display diagram of an operation input unit and a display unit in the individual heating mode of the first embodiment. FIG. 6 is a state display diagram of an operation input unit and a display unit in the left integrated heating mode according to the first embodiment. FIG. 3 is a state display diagram of an operation input unit and a display unit in the right integrated heating mode according to the first embodiment. 4 is a flowchart when the integrated heating switch according to the first embodiment is pressed. 3 is a flowchart of a heating power setting / heating control process for a left IH heating port according to the first embodiment. 3 is a flowchart of left integrated control processing according to the first embodiment. 3 is a flowchart of a heating power setting / heating control process for a right IH heating port according to the first embodiment. 4 is a flowchart of right integrated control processing according to the first embodiment. 3 is a flowchart of a heating power setting / heating control process for a central IH heating port according to the first embodiment. It is a top view when the heating coil for right and left IH of FIG. 6 is a state display diagram of an operation input unit and a display unit in an individual heating mode according to Embodiment 2. FIG. 10 is a state display diagram of an operation input unit and a display unit in a left integrated heating mode according to Embodiment 2. FIG. FIG. 10 is a state display diagram of an operation input unit and a display unit in the right integrated heating mode according to the second embodiment. It is a top view which shows the area of the heating coil of the induction heating cooking appliance which concerns on Embodiment 3. FIG. 10 is a flowchart of left integrated control processing according to the third embodiment. 10 is a flowchart of right integrated control processing according to Embodiment 3.

Embodiment 1 FIG.
1 is an external view of an induction heating cooker according to Embodiment 1. FIG.
In FIG. 1, an induction heating cooker includes a main body 1 of the heating cooker, a top plate 2 on which the upper surface of the main body 1 is mounted, a cooking container placed thereon, and a heating power setting for a heating port on one side surface of the main body 1. The operation input part 4 to perform and the display part 5 which shows the heating output state of a heating port on the same side surface as the operation input part 4 of the main body 1 are provided. There are three positions on the top plate 2 where the cooking container is to be placed, and when the side surfaces of the operation input unit 4 and the display unit 5 are fronts, the cooking container placement is shown with a circular left IH heating port on the left. There are a position display 3a, a cooking container placement position display 3b indicating a circular right IH heating port on the right, and a cooking container placement position display 3c indicating a vertically long elliptical central IH heating port in the center (hereinafter, left and right). And when referring to all of the center, it is described as “each cooking container placement position display 3a to 3c”). A heating coil (not shown in FIG. 1) having a shape similar to the placement position display is disposed on the main body 1 positioned below each cooking container placement position display 3a to 3c, and a high-frequency current is supplied to the heating coil. A high-frequency power supply circuit and a control circuit (not shown in FIG. 1) for supplying the air are also provided inside the main body 1.

  The operation input unit 4 includes a left-to-left IH heating port operation unit 4a, a central IH heating port operation unit 4c, and a right IH heating port operation unit 4b. The operation unit 4a includes a left IH off switch 4Fa for instructing to stop heating the left IH heating port, a left IH heating power reduction switch 4Da for instructing heating start and heating power reduction for the left IH heating port, and heating start for the left IH heating port. And a left IH thermal power increase switch 4Ua for instructing an increase in thermal power. Similarly, the operation unit 4c includes, from the left, a central IH off switch 4Fc, a central IH thermal power reduction switch 4Dc, and a central IH thermal power increase switch 4Uc. The operation unit 4b includes, from the left, a right IH off switch 4Fb, a right IH heating power reduction switch 4Db, and a right IH heating power increase switch 4Ub. Also, between the operation unit 4a and the operation unit 4c of the operation input unit 4, there is a left integrated heating switch 4ac that turns on and off a left integrated heating mode in which the left IH heating port and the central IH heating port operate as a unit. Between the operation unit 4c and the operation unit 4b, there is a right integrated heating switch 4cb for turning on / off a right integrated heating mode in which the central IH heating port and the right IH heating port are operated as a unit.

The display unit 5 includes a left IH heating power display unit 5a indicating the heating power of the left IH heating port from the left, a central IH heating power display unit 5c indicating the heating power of the central IH heating port, and a right IH heating power indicating the heating power of the right IH heating port. And a display unit 5b. Between the left IH thermal power display unit 5a and the central IH thermal power display unit 5c of the display unit 5, there is a left integrated display lamp 5ac that displays the left integrated heating mode. Further, there is a right integrated display lamp 5cb for displaying that the right integrated heating mode is set between the central IH thermal power display unit 5c and the right IH thermal power display unit 5b.
Each of the IH thermal power display units 5a to 5c is formed by a plurality of issuing elements such as LEDs. In the individual heating mode in which the heating ports are individually controlled, the number of issuing elements corresponding to the set heating power of each heating port is lit and displayed in different colors for each heating port.

  When the left integrated heating switch 4ac is pressed and the left integrated heating mode is selected, the left integrated display lamp 5ac is turned on, and the thermal power set by the left IH thermal power decrease switch 4Da and the left IH thermal power increase switch 4Ua is changed to the left IH. Display is performed using both the thermal power display unit 5a and the central IH thermal power display unit 5c. Similarly, when the right integrated heating switch 4cb is pressed and the right integrated heating mode is selected, the right integrated display lamp 5cb is turned on, and the thermal power set by the right IH thermal power decrease switch 4Db and the right IH thermal power increase switch 4Ub is set. It displays using both the center IH thermal power display part 5c and the right IH thermal power display part 5b.

FIG. 2 is a circuit configuration diagram of the induction heating cooker according to the first embodiment.
In FIG. 2, the commercial AC power supply 6 includes a left IH heating high frequency power supply circuit 7 and a load circuit 8, a right IH heating high frequency power supply circuit 9 and a load circuit 10, a central IH heating high frequency power supply circuit 11 and The load circuit 12 is connected. Each high frequency power supply circuit 7, 9, 11 converts an alternating current from the commercial AC power supply 6 into high frequency power provided to each load circuit 8, 10, 12. The input voltage detection means 13 detects the input voltage to each high frequency power supply circuit 7, 9, 11. The left IH input current detection means 14 detects the input current of the left IH high frequency power supply circuit 7, and the right IH input current detection means 15 detects the input current of the right IH high frequency power supply circuit 9, and the central IH The input current detection means 16 detects the input current of the central IH high-frequency power supply circuit 11. The left IH output current detection means 17 detects the output current of the left IH high frequency power supply circuit 7, and the right IH output current detection means 18 detects the output current of the right IH high frequency power supply circuit 9, and the central IH The output current detection means 19 detects the output current of the central IH high frequency power supply circuit 11.

  Each of the high frequency power supply circuits 7, 9, and 11 includes a DC power supply circuit 20, 21, 22 that rectifies and smoothes the AC power of the commercial AC power supply 6, and inverter circuits 23, 24, 25. Each of the DC power supply circuits 20, 21, and 22 includes a rectifier circuit 26, 27, and 28 that rectifies the AC power of the commercial AC power supply 6, and a choke coil 29, 30, and 31 that smoothes the output of the rectifier circuits 26, 27, and 28, respectively. And smoothing capacitors 32, 33, and 34. The inverter circuits 23, 24, and 25 include high-potential side switching elements 35, 36, and 37, and low-potential side switching elements 38, 39, and 37 connected in series between the output buses of the DC power supply circuits 20, 21, and 22, respectively. 40, a drive circuit 47 for alternately turning on / off the diodes 41 to 46 connected in antiparallel with the respective switching elements, the high potential side switching elements 35, 36, and 37 and the low potential side switching elements 38, 39, and 40. -It consists of 48 and 49.

  The load circuits 8, 10, and 12 for each heating port include a left IH heating coil 50, a right IH heating coil 51, a central IH heating coil 52, its resonant capacitors 53, 54, and 55, and a resonant capacitor 53. And clamp diodes 56, 57 and 58 connected in parallel with 54 and 55, respectively. The control unit 59 that controls the entire induction heating cooker controls the heating output of each heating port by controlling the drive circuits 47, 48, and 49 based on the heating power set from the operation input unit 4, and displays The heating operation state is displayed on part 5.

FIG. 3 is a plan view showing shapes and arrangements of the left IH heating coil, the central IH heating coil, and the right IH heating coil according to the first embodiment.
As shown in FIG. 3, the left IH heating coil 50 and the right IH heating coil 51 arranged on the left and right are wound in a substantially circular shape, and the central IH heating coil 52 arranged in the center is wound in a substantially vertically long oval shape. Turn. The pitch P0 of the coil conductors of the left IH heating coil 50 and the right IH heating coil 51 is wider than the coil conductor pitch P1 in the minor axis direction of the central IH heating coil 52 and narrower than the coil conductor pitch P2 in the major axis direction. To do. The coil conductor density of the left IH heating coil 50 and the right IH heating coil 51 and the coil conductor density of the central IH heating coil 52 should not be significantly different. As a result, when an equivalent high-frequency current is passed through the left IH heating coil 50, the right IH heating coil 51, and the central IH heating coil 52, it is possible to obtain a heating density that is not significantly different at each heating port. If approximately the same heating density is obtained at each heating port, even when heating is performed in the left integrated heating mode or the right integrated heating mode, the occurrence of uneven heating can be suppressed.

  FIG. 4 is a positional relationship diagram of the heating coil and the heated container according to the heating mode of the first embodiment. FIG. 4A shows that in the individual heating mode, medium-sized cooking containers 60a and 60b are placed on the left IH heating coil 50 and right IH heating coil 51, and a small-diameter cooking container 60c is placed on the central IH heating coil 52. It can be arranged. FIG. 4B shows a large-diameter cooking container 60d on the left IH heating coil 50 and the central IH heating coil 52 and a medium-diameter cooking container 60b on the right IH heating coil 51 in the left integrated heating mode. Shows that can be placed. FIG. 4C shows a large-diameter cooking container 60d on the central IH heating coil 52 and the right IH heating coil 51 and a medium-diameter cooking container 60a on the left IH heating coil 50 in the right integrated heating mode. Shows that can be placed. The cooking container 60d is a vessel having a diameter larger than the diameter of the left IH heating coil 50 or the right IH heating coil 51.

  4B and 4C, in the left integrated heating mode or the right integrated heating mode, a combination of the left IH heating coil 50 and the central IH heating coil 52, or the central IH heating coil 52 and the right By combining the heating coil 51 for IH, an induced eddy current can be generated even in a cooking container having a large bottom area, and the container can be heated.

  5 to 7 are front views of the operation input unit and the display unit according to the first embodiment. 5 is a display example of the operation input unit and the display unit operating in the individual heating mode, FIG. 6 is a display example of the operation input unit and the display unit operating in the left integrated heating mode, and FIG. 7 is the right integrated heating. The example of a display of the operation input part in operation | movement in a mode and a display part is shown. Each of the IH thermal power display units 5a to 5c has a plurality of two-color LEDs (for example, red and blue) (for example, six in the case of the left IH thermal power display unit 5a). Lights up, and in the heating state in the individual heating mode, a number of LEDs corresponding to the thermal power level are lit in red. In the heating state in the left integrated heating mode, both the left IH thermal power display unit 5a and the central IH thermal power display unit 5c are regarded as one display unit, and the number of LEDs corresponding to the thermal power level is purple (red and blue are lit simultaneously) Lit). Similarly, in the right integrated heating mode, both the central IH thermal power display unit 5c and the right IH thermal power display unit 5b are regarded as one display unit, and a number of LEDs corresponding to the thermal power level are lit in purple.

  In this embodiment, an LED that can display the display unit in three states is used, but two states in which the difference in lighting display due to the difference in the heating mode is eliminated may be used. Moreover, although LED was utilized this time, a display part is not restricted to LED. The heating output state corresponding to the heating mode and the thermal power level may be displayed using the color, length, or area using the liquid crystal panel.

  As shown in FIG. 5, in the individual heating mode, the left integrated display lamp 5ac and the right integrated display lamp 5cb are turned off. In Fig.5 (a), since all LED of each IH thermal-power display part 5a-5c is lighting in blue, it has shown that it is the stop state which can heat all the heating ports. In FIG. 5B, since the four LEDs of the left IH thermal power display unit 5a are lit red, the left heating port is thermal power 4, and the other LEDs are blue. This indicates that the heating port is stopped. In FIG.5 (c), since each IH thermal power display part 5a-5c is lit in red by three, four, and two, respectively, the left heating port is thermal power 3, the right heating port is thermal power 4, and the center. It shows that the heating port is thermal power 2.

  Next, as shown in FIG. 6, in the left integrated heating mode, the left integrated display lamp 5ac is turned on and the right integrated display lamp 5cb is turned off. In FIG. 6 (a), as in FIG. 5 (a), the LEDs of each of the IH thermal power display units 5a to 5c are all lit in blue, indicating that all the heating ports are in a stopped state in which heating is possible. ing. In FIG. 6 (b), since the three LEDs of the left IH thermal power display unit 5a are lit in red and none of the LEDs of the central IH thermal power display unit 5c are lit in red, the left heating port and the central heating The total thermal power of the mouth is 3, and since the two LEDs of the right IH thermal power display unit 5b are lit in red, this indicates that the right heating port is thermal power 2. In FIG. 6C, since the six LEDs of the left IH thermal power display unit 5a are lit red and the two LEDs of the central IH thermal power display unit 5c are lit red, the left heating port and the central heating Since the total thermal power of the mouth is 8, and the four LEDs of the right IH thermal power display unit 5b are lit in red, it indicates that the right heating port is the thermal power 4.

  Further, as shown in FIG. 7, in the right integrated heating mode, the right integrated display lamp 5cb is turned on and the left integrated display lamp 5ac is turned off. In FIG. 7 (a), as in FIGS. 5 (a) and 6 (a), the LEDs of each of the IH thermal power display units 5a to 5c are all lit in blue, so that all the heating ports can be heated. It shows that it is in a state. In FIG. 7 (b), since all the LEDs of the left IH thermal power display unit 5a are not lit in red, the left heating port is in a stopped state that can be heated, and two LEDs of the central IH thermal power display unit 5c Is lit red, and no LEDs of the right IH thermal power display 5b are lit red, indicating that the total thermal power of the central heating port and the right heating port is 2. In FIG. 7C, since the five LEDs of the left IH thermal power display unit 5a are lit red, the left heating port is the thermal power 5, and the five LEDs of the central IH thermal power display unit 5c are red. Since the two LEDs of the right IH thermal power display unit 5b are lit red, it is indicated that the total thermal power of the central heating port and the right heating port is 7.

  To switch between the individual heating mode and the left integrated heating mode, or the individual heating mode and the right integrated heating mode, the left integrated heating switch 4ac or the right integrated heating switch 4cb is operated with the heating of the corresponding heating port stopped. Can be switched. That is, when the left integrated heating switch 4ac is operated, it is controlled according to three cases. When the first left IH heating coil 50 or the central IH heating coil 52 is energized, the heating mode is not changed. When the second left IH heating coil 50 and the central IH heating coil 52 are not energized and are in the left integrated heating mode, the mode shifts to the individual heating mode and the left integrated display lamp 5ac is turned off. When the third left IH heating coil 50 and the central IH heating coil 52 are not energized and are not in the left integrated heating mode, the left integrated heating mode is switched on and the left integrated display lamp 5ac is turned on. Even when the right heating integrated mode is selected, the left IH heating coil 50 and the central IH heating coil 52 are not energized (therefore, no high-frequency current flows through the right IH heating coil). When the left integrated heating switch 4ac is operated in the state), the right integrated heating mode is canceled and the right integrated display lamp 5cb is turned off, the left integrated heating mode is set, and the left integrated display lamp 5ac is turned on.

  When the right integrated heating switch 4cb is operated, the control is performed according to three cases as in the case where the left integrated heating switch 4ac is operated. When the first right IH heating coil 51 or the central IH heating coil 52 is energized, the heating mode is not changed. When the second central heating coil 52 and the right IH heating coil 51 are not energized with high-frequency current and are in the right integrated heating mode, the mode shifts to the individual heating mode and the right integrated display lamp 5cb is turned on. Turns off. When the third central heating coil 52 for the central IH and the heating coil 51 for the right IH are not energized with high-frequency current and are not in the right integrated heating mode, the right integrated heating lamp 52cb is switched to the right integrated heating mode. Light.

Next, the operation control of the present embodiment will be described using a flowchart.
FIG. 8 shows operation control when the integrated heating switch is pressed, FIG. 9 shows acceptance of the heating power setting of the left IH heating port and heating control processing in the individual heating mode, and FIG. 10 shows left integrated heating. FIG. 11 shows the heating control process for the left IH inverter circuit and the central IH inverter circuit during the mode, FIG. 11 shows the acceptance of the heating power setting of the right IH heating port and the heating control process during the individual heating mode, and FIG. The heating control process for the right IH inverter circuit and the central IH inverter circuit in the right integrated heating mode is shown. FIG. 13 shows the heating control process for the central IH inverter circuit in the individual heating mode.

  In FIG. 8, first, the presence / absence of an input to the left integrated heating switch is determined (step 1). If there is an input, the individual heating mode in which each heating port is individually controlled or the left heating port and the central heating port are switched. It is determined whether the left integrated heating mode is controlled integrally or the right integrated heating mode is controlled where the right heating port and the central heating port are integrated (step 2). If it is in the left integrated heating mode, it is determined whether the left IH inverter circuit is stopped (step 3). If it is stopped, the left integrated heating mode is canceled to enter the individual heating mode, and the left integrated display The lamp 5ac is turned off (step 4). If it is in the right integrated heating mode in step 2, it is determined whether the right IH inverter circuit and the left IH inverter circuit are stopped (step 5). If both are stopped, the right integrated heating mode is canceled. Then, the left integrated heating mode is set, the right integrated display lamp 5cb is turned off, and the left integrated display lamp 5ac is turned on (step 6). The operation state of the central IH inverter circuit is the same as the operation state of the right IH inverter circuit in the right integrated heating mode. If it is determined in step 2 that the heating mode is the individual heating mode, it is determined whether the left IH inverter circuit and the central IH inverter circuit are in a stopped state (step 7). The display lamp 5ac is turned on (step 8).

  Next, it is determined whether or not there is an input from the right integrated heating switch (step 9). When there is an input, the individual heating mode that controls each heating port individually, the left integrated heating mode that controls the left heating port and the central heating port as a unit, or the right heating port and the central heating port as a unit are controlled. It is determined whether the right integrated heating mode is selected (step 10). If the right integrated heating mode is selected, it is determined whether the right IH inverter circuit is stopped heating (step 11). The mode is canceled to enter the individual heating mode, and the right integrated display lamp 5cb is turned off (step 12). If it is determined in step 10 that the left integrated heating mode is selected, it is determined whether the left IH inverter circuit and the right IH inverter circuit are stopped (step 13). If both are stopped, the left integrated heating mode is canceled. Then, the right integrated heating mode is set, the left integrated display lamp 5ac is turned off, and the right integrated display lamp 5cb is turned on (step 14). The operation state of the central IH inverter circuit is the same as the operation state of the left IH inverter circuit in the left integrated heating mode. If it is determined in step 10 that the heating mode is the individual heating mode, it is determined whether the right IH inverter circuit and the central IH inverter circuit are stopped (step 15). The display lamp 5cb is turned on (step 16). The input process of the left integrated heating switch and the right integrated heating switch is thus completed, and the process proceeds to the heating power setting / heating control process for the left IH heating port.

  In the heat setting / heating control process for the left IH heating port in FIG. 9, it is first determined whether or not heating is being performed at the left IH heating port (step 17). If heating is being performed, it is determined whether or not the left IH off switch 4Fa is being input. If there is no input, the presence or absence of input from the left IH thermal power reduction switch 4Da is confirmed (step 19). If there is an input, the red display number of the two-color LED of the left IH thermal power display unit 5a (left integrated heating) In the case of the mode, the left IH thermal power display unit 5a and the central IH thermal power display unit 5c are reduced in purple), and the set thermal power of the left IH heating port is decreased (step 20). If there is no input from the left IH heating power reduction switch 4Da in step 19, the presence or absence of input from the left IH heating power increase switch 4Ua is confirmed (step 21). If there is no input, the set heating power of the left IH heating port is maintained. If there is an input, the red display number of the two-color LED of the left IH thermal power display unit 5a is increased (in the case of the left integrated heating mode, the purple display number of the left IH thermal power display unit 5a and the central IH thermal power display unit 5c) is increased. The set heating power of the IH heating port is increased (step 22).

  If it is determined in step 17 that heating is not being performed, it is determined whether or not the left IH heating power reduction switch 4Da is input (step 23). If there is no input, it is determined whether or not the left IH heating power increase switch 4Ua is input (step 23). 24). If there is no input in either step 23 or step 24, the left IH heating control process is terminated. If there is an input in either, the predetermined number of two-color LEDs of the left IH thermal power display unit 5a is set. The display is changed to red display (purple display in the case of the left integrated heating mode), and a predetermined heating power is set to the left IH heating port (step 25).

  When there is no input to the left IH heating power increase switch 4Ua in step 21, or after setting the heating power of the left IH heating port in steps 20, 22 and 25, it is determined whether the left integrated heating mode is set (step 26). If the left integrated heating mode, the left integrated heating control process (shown in FIG. 10) is performed (step 27). If the left integrated heating mode is not selected, the input voltage, the left IH input current, and the left IH output current are detected (step 27). 28) It is determined whether the left IH output current is excessive (step 29). If it is not excessive, the power corresponding to the set thermal power of the left IH is compared with the input power calculated from the input voltage and input current detected in step 28. (Step 30) When the input power is smaller, the left IH drive circuit 47 is controlled to increase the heating output (Step 31). If the output current is excessive in step 28 or if the input power is larger in step 30, the drive circuit of the left IH inverter circuit is controlled to reduce the heating output (step 32).

  When the left IH off switch 4Fa is input in step 18, two colors of the left IH thermal power display unit 5a (the left IH thermal power display unit 5a and the central IH thermal power display unit 5c in the case of the left integrated heating mode). Change all LEDs to blue, and control the drive circuit for the left IH inverter circuit (in the left integrated heating mode, the drive circuit for the left IH inverter circuit and the drive circuit for the central IH inverter circuit) to stop heating. (Step 33), the left IH heating port heating power setting / heating control process is terminated.

  Next, based on FIG. 10, the operation of the left integrated heating control process in which the left IH heating port and the central IH heating port are integrated into one heating port to control the heating power will be described. First, the left IH high-frequency power circuit 7 and the left IH input current detection means 14 and output current detection means 17, the central IH input current detection means 16 and the output current detection means 19 The input voltage and input / output current of the central IH high-frequency power supply circuit 11 are detected (step 27-1), and the output current of the left IH and the output current of the center IH are compared (step 27-2).

  If the left IH output current is larger, it is determined whether the left IH output current is an overcurrent (step 27-3). If it is not an overcurrent, the power corresponding to the set thermal power is detected in step 27-1. Compared with the sum of the input power of the left IH high frequency power supply circuit 7 and the central IH high frequency power supply circuit 11 obtained from the input voltage and the left IH / center IH input current (step 27-4), the sum of the input power is more If it is smaller, the drive circuit 49 is controlled to increase the output of the central IH inverter circuit 25 (step 27-5). Further, when the sum of the input power is larger, or when the output current of the left IH is an overcurrent in step 27-3, the output of the left IH inverter circuit 23 is suppressed by controlling the drive circuit 47. (Step 27-6).

  If the output current of the central IH is larger in step 27-2, it is determined whether the output current of the central IH is an overcurrent (step 27-7). 27-1 is compared with the sum of the input power of the left IH high-frequency power supply circuit 7 and the central IH high-frequency power supply circuit 11 obtained from the input voltage detected in 27-1 and the left IH / center IH input current (step 27-8). If the sum of power is smaller, the drive circuit 47 is controlled to increase the output of the left IH inverter circuit 23 (step 27-9). When the sum of the input powers is larger, or when it is determined in step 27-7 that the output current of the central IH is an overcurrent, the drive circuit 49 is controlled to output the central IH inverter circuit 25. Is suppressed (step 27-10).

  When the left IH heating port heating power setting / heating control process shown in FIG. 9 is completed, the right IH heating port heating power setting / heating control process shown in FIG. 11 is executed. In FIG. 11, it is first determined whether or not heating is being performed at the right IH heating port (step 34). If heating is being performed, it is determined whether or not the right IH off switch 4Fb is input (step 35). The presence or absence of input of the thermal power reduction switch 4Db is confirmed (step 36). If there is an input, the red display number of the two-color LED of the right IH thermal power display unit 5b (in the case of the right integrated heating mode, the right IH thermal power display unit 5b and The number of purple displayed on the central IH heating power display section 5c is decreased, and the set heating power of the right IH heating port is decreased (step 37). If there is no input from the right IH heating power reduction switch 4Db in step 35, the presence or absence of input from the right IH heating power increase switch 4Ub is confirmed (step 38). If there is no input, the set heating power of the right IH heating port is maintained. If there is an input, the red display number of the two-color LED of the right IH thermal power display unit 5b is increased (in the case of the right integrated heating mode, the purple display number of the right IH thermal power display unit 5b and the central IH thermal power display unit 5c) and the right IH The set heating power of the heating port is increased (step 39).

  If it is determined in step 34 that heating is not being performed, it is determined whether or not the right IH heating power reduction switch 4Db is input (step 40). If there is no input, it is determined whether or not the right IH heating power increase switch 4Ub is input (step 40). 41). If there is no input in either step 40 or step 41, the right IH heating control process is terminated. If there is an input in either of the steps, the right IH heating power display unit 5b 2 is selected in the individual heating mode. The predetermined number of color LEDs is changed to red display, and if it is the right integrated heating mode, the predetermined number of LEDs of the central IH thermal power display unit 5c is changed to purple display, and a predetermined thermal power is set to the right IH heating port (step 42).

  When there is no input to the right IH heating power increase switch 4Ub at step 38, or after the heating power of the right IH heating port is set at step 37, step 39, and step 42, it is determined whether the right integrated heating mode is set (step 43). If the right integrated heating mode is selected, the right integrated heating control process (shown in FIG. 12) is performed (step 44). If the right integrated heating mode is not selected, the input voltage, the right IH input current, and the right IH output current are detected (step 44). 45) It is determined whether the right IH output current is excessive (step 46). If it is not excessive, the power corresponding to the set thermal power of the right IH is compared with the input power calculated from the input voltage and input current detected in step 45. (Step 47) When the input power is smaller, the right IH drive circuit 48 is controlled to increase the heating output (Step 48). If the output current is excessive in step 45 or if the input power is larger in step 47, the heating output is decreased by controlling the drive circuit 48 of the right IH inverter circuit (step 49).

  If there is an input to the right IH off switch 4Fb in step 35, the two-color LEDs of the right IH thermal power display 5b (the right IH thermal power display 5b and the central IH thermal power display 5c in the case of the right integrated heating mode) are turned on. Change all to blue display and control the drive circuit 48 of the right IH inverter circuit (in the case of the right integrated heating mode, control the drive circuit 48 of the right IH inverter circuit and the drive circuit 49 of the central IH inverter circuit) to stop heating. (Step 50). The right IH heating port heating power setting / heating control process is thus completed, and the process proceeds to the central IH heating port heating power setting / heating control process shown in FIG.

The right integrated heating control process shown in FIG. 12 is the same process as the left integrated heating control process shown in FIG.
In FIG. 12, a high frequency power supply circuit for right IH using input voltage detection means 13, right IH input current detection means 15 and output current detection means 18, central IH input current detection means 16 and output current detection means 19. 9 and the input voltage and input / output current of the high frequency power supply circuit 11 for the central IH are detected (step 44-1), and the output current of the right IH is compared with the output current of the central IH (step 44-2). If the output current of the right IH is larger, it is determined whether the output current of the right IH is an overcurrent (step 44-3). If it is not an overcurrent, the power corresponding to the set thermal power is detected in step 44-1 Compared with the sum of the input power of the right IH high frequency power supply circuit 9 and the central IH high frequency power supply circuit 11 obtained from the input voltage and the right IH / center IH input current (step 44-4), the sum of the input power is more If it is smaller, the drive circuit 49 is controlled to increase the output of the central IH inverter circuit 25 (step 44-5). Further, when the sum of the input powers is larger, or when the output current of the right IH is an overcurrent in step 44-3, the output of the right IH inverter circuit 24 is suppressed by controlling the drive circuit 48. (Step 44-6).

  If the output current of the center IH is larger in step 44-2, it is determined whether the output current of the center IH is an overcurrent (step 44-7). Compared with the sum of the input power of the right IH high frequency power supply circuit 9 and the central IH high frequency power supply circuit 11 obtained from the input voltage detected at 44-1 and the right IH / center IH input current (step 44-8) If the sum of the power is smaller, the drive circuit 48 is controlled to increase the output of the right IH inverter circuit 24 (step 44-9). If the sum of the input powers is greater, or if it is determined in step 44-7 that the output current of the central IH is an overcurrent, the drive circuit 49 is controlled to output the output of the central IH inverter circuit 25. Is suppressed (step 44-10).

Next, the central IH heating power setting / heating control process shown in FIG. 13 will be described.
When the right IH heating port heating power setting / heating control process shown in FIG. 11 is finished and the process proceeds to the central IH heating port heating power setting / heating control process of FIG. 13, it is first determined whether or not the individual heating mode is set (step 51). In the individual heating mode, it is determined whether or not heating is being performed at the central IH heating port (step 52). If heating is being performed, it is determined whether or not the central IH off switch 4Fc is input (step 53). The presence / absence of input to the IH thermal power reduction switch 4Dc is confirmed (step 54). If there is an input, the number of red display of the two-color LED of the central IH thermal power display section 5c is reduced and the thermal power set for the central IH heating port is decreased (step) 55). If there is no input from the central IH thermal power reduction switch 4Dc in step 54, the presence or absence of input from the central IH thermal power increase switch 4Uc is confirmed (step 56). If there is no input, the set thermal power of the central IH heating port is maintained. If there is an input, the red display number of the two-color LED in the central IH thermal power display section 5c is increased, and the set thermal power of the central IH heating port is increased (step 57).

  If it is determined in step 52 that heating is not being performed, it is determined whether or not the central IH heating power reduction switch 4Dc is input (step 58). If there is no input, it is determined whether or not the central IH heating power increase switch 4Uc is input (step 58). 59). If there is no input in either step 58 or step 59, the central IH heating port heating power setting / heating control process is terminated, and if there is an input in either, the two colors of the central IH heating power display 5c The predetermined number of LEDs is changed to red display, and a predetermined heating power is set in the central IH heating port (step 60).

  When there is no input to the central IH heating power increase switch 4Uc at step 56, or after the heating power setting of the central IH heating port is performed at steps 55, 57, and 60, the input voltage, the central IH input current, and the central IH output current are set. Is detected (step 61), and it is determined whether the central IH output current is excessive (step 62). If not, the input calculated from the power corresponding to the set thermal power of the central IH and the input voltage and input current detected in step 61 are detected. The power is compared (step 63). If the input power is smaller, the right IH drive circuit 48 is controlled to increase the heating output (step 64). When the output current is excessive at step 62 or when the input power is larger at step 63, the drive circuit 49 of the central IH inverter circuit is controlled to reduce the heating output (step 65).

  If there is an input from the central IH off switch 4Fc in step 53, all the two-color LEDs of the central IH thermal power display section 5c are changed to blue display, and the heating circuit 49 is stopped by controlling the drive circuit 49 of the central IH inverter circuit. (Step 66). The central IH heating power setting / heating control process is thus completed, and the process returns to the integrated heating switch reception process shown in FIG.

  By performing the left integrated thermal power control process of FIG. 10 and the right integrated thermal power control process of FIG. 12 described above, the sum of the input power of the left IH heating port and the central IH heating port, the right IH heating port and the central IH heating port While controlling the sum of the input powers to be the power corresponding to the set thermal power, the difference between the currents flowing in the left IH heating coil 50 and the central IH heating coil 52, the right IH heating coil 51 and the central IH heating It is possible to control so as to suppress the difference between currents flowing through the coil 52, so that the current flowing through the plurality of switching elements is not biased to avoid stress concentration on some switching elements, and in the left integrated heating mode In the left IH heating coil 50 and the central IH heating coil 52 are prevented from uneven heating, and the right IH heating coil in the right integrated heating mode. It is possible to suppress the uneven heating of the heating portion by the heating portion and the central IH heating coil 52 by 1.

The induction heating cooker according to the present embodiment suppresses uneven heating even when heating a pot having a diameter larger than the diameter of each heating coil provided, and selects a heating position at which a pot having a large diameter can be used. Each heating coil can be heated by providing a left integrated display lamp, a right integrated display lamp, or changing the display color for displaying the heating output level in the individual heating mode and the integrated heating mode. It is possible to clearly grasp whether the outputs are individually controlled or whether the heating outputs of the plurality of heating coils are integrally controlled. Further, in the integrated heating mode, more detailed thermal power display can be performed using a plurality of thermal power displays. In the present embodiment, the left and right heating coils are shown as examples using heating coils wound in a substantially circular shape, but the left and right heating coils may also be heating coils wound in a vertically long elliptical shape.
FIG. 14 is a plan view when the right and left IH heating coils of FIG.

Embodiment 2. FIG.
15 to 17 are front views of the operation input unit and the display unit of the induction heating cooker according to the second embodiment. In the first embodiment, the left IH heating port, the right IH heating port, and the central IH heating port are individually provided with thermal power display units. In the left integrated heating mode, the left IH heating port thermal power display unit and the central IH heating unit are provided. The thermal power display unit for the mouth is used for the thermal power display. In the right integrated heating mode, the thermal power display unit for the right IH heating port and the thermal power display unit for the central IH heating port are combined and used for the thermal power display. On the other hand, in the present embodiment, a plurality of two-color LEDs (for example, red and blue) arranged continuously that constitute the thermal power display unit are divided into a plurality of sets and used for the thermal power display of each heating port.

  FIG. 15 is a display example of the operation input unit and the display unit that are operating in the individual heating mode. The display unit 5 includes an LED group 5f indicating the heating output state of the left IH heating port, an LED group 5g indicating the heating output state of the right IH heating port, an LED group 5h indicating the heating output state of the central IH heating port, In order to divide and distinguish the LED group of the thermal power display unit, unused LEDs (light-off state) 5i and 5j are provided between the LED groups. FIG. 15A shows a display in a state where the heating operation is stopped for each heating port, and FIG. 15B shows that the left IH heating port has thermal power 4, the right IH heating port has thermal power 2, and the central IH heating port has It shows that the heating operation is performed with the thermal power 1. Each LED group is turned on in blue when the LED group indicating the thermal power is turned on in the heating stopped state, and is turned on by changing the number of LEDs corresponding to the thermal power to red in the heated state.

  FIG. 16 is a display example of the operation input unit and the display unit that are operating in the left integrated heating mode. The display unit 5 includes an LED group 5k that indicates the heating output state of the left integrated heating port that combines the heating output of the left IH heating port and the central IH heating port, an LED group 5g that indicates the heating output state of the right IH heating port, In order to divide and distinguish the LED groups 5k and 5g, an unused LED 5l is provided between them. FIG. 16 (a) shows a display when heating is stopped for each heating port, and FIG. 16 (b) shows a display when the left integrated heating port is thermal power 5 and the right IH heating port is thermal power 3. ing. The thermal power display of the left integrated heating port in the left integrated heating mode occupies a large area on the left side of the thermal power display unit, and it can be intuitively understood that the left integrated heating mode realizes a wide heating area.

  FIG. 17 is a display example of the operation input unit and the display unit that are operating in the right integrated heating mode. The display unit 5 includes an LED group 5f that indicates the heating output state of the left IH heating port, an LED group 5m that indicates the heating output state of the right integrated heating port that combines the heating outputs of the central IH heating port and the right IH heating port, In order to divide and distinguish the LED groups 5f and 5m, an unused LED group 5n is provided between them. FIG. 17A shows a display when heating is stopped for each heating port, and FIG. 17B shows a display when the left IH heating port is heating power 1 and the right integrated heating port is heating power 6. ing. The thermal power display of the right integrated heating port in the right integrated heating mode occupies a large area on the right side of the thermal power display unit, and it can be intuitively understood that the right integrated heating mode has a wide heating area on the right side.

  As described above, in the induction heating cooker according to the present embodiment, the LED group of the thermal power display unit is divided according to the position and size of the heating area such as the individual heating mode, the left integrated heating mode, and the right integrated heating mode. And since it was used for the thermal power display of each heating port, the position and size of the heating area of each heating port can be grasped intuitively by the display mode. In FIGS. 15 to 17 in the present embodiment, the thermal power level display in the individual heating mode and the thermal power level display in the left integrated heating mode or the right integrated heating mode are performed in the same display color (red). In the heating mode or the right integrated heating mode, the display color of the thermal power level is displayed differently from that in the individual heating mode (for example, the red color is displayed in the individual heating mode, and the purple color is displayed in the integrated heating mode (the red LED and the blue LED are simultaneously displayed). It becomes easy to grasp the heating mode during operation.

Embodiment 3 FIG.
As shown in FIG. 3, the induction heating cooker according to the first embodiment suppresses the difference in the coil conductor density of each heating coil, and in the left integrated heating mode, the left IH heating coil and the central IH heating coil are used. As shown in FIG. 10, the heating control is performed by suppressing the difference between the currents flowing in the left IH heating coil and the central IH heating coil, thereby heating the left IH heating coil 50 and the central IH heating coil 52. Similarly, in the right integrated heating mode, the right IH heating coil and the central IH heating coil are used to flow through the right IH heating coil and the central IH heating coil as shown in FIG. By controlling the heating while suppressing the difference in current, uneven heating between the heating portion by the right IH heating coil 51 and the heating portion by the central IH heating coil 52 was suppressed.

  In the present embodiment, the power of each high-frequency power supply circuit that performs heating integrally is set to a value proportional to the area of each heating coil, thereby suppressing uneven heating due to different heating coils. The circuit configuration of the induction heating cooker according to the present embodiment, the heating mode switching process, and the heating control process in the individual heating mode are as shown in FIGS. 2, 8, 9, 11, and 13 of the first embodiment. This is the same and will not be described. Hereinafter, the heating control process in the left integrated heating mode and the right integrated heating mode will be described.

  FIG. 18 is a plan view showing the area of the heating coil of the induction heating cooker according to the third embodiment. In FIG. 18, the coil area S1 is the occupied area of the left IH heating coil 50, the coil area S2 is the occupied area of the right IH heating coil 51, and the coil area S3 is the occupied area of the central IH heating coil 52. .

  FIG. 19 shows a heating control process for the left IH inverter circuit and the central IH inverter circuit in the left integrated heating mode, and FIG. 20 shows the central IH inverter circuit and the right IH inverter circuit in the right integrated heating mode. A heating control process is shown. In FIG. 19, first, the left IH high-frequency signal is generated using the input voltage detection means 13, the left IH input current detection means 14 and the output current detection means 17, the central IH input current detection means 16 and the output current detection means 19. The input voltage and input / output current of the power supply circuit 7 and the central IH high frequency power supply circuit 11 are detected (step 101), and the detected output current of the left IH high frequency power supply circuit 7 and the output current of the central IH high frequency power supply circuit 11 are detected. It is determined whether there is an overcurrent (step 102). If it is an overcurrent, the corresponding drive circuit 47 or 49 is controlled to suppress the output current to suppress the output of the left IH inverter circuit 23 or the central IH inverter circuit 25 (step 103). If the output current is not an overcurrent in step 102, the input power (W1) of the left IH heating port obtained from the power corresponding to the set heating power, the input voltage detected in step 101, and the input current of the left IH / center IH And it compares with the sum of the input power (W3) of the central IH heating port (step 104).

  When the sum of the input powers is larger, the ratio of the input power W1 of the left IH heating port to the heating coil area S1 of the left IH (W1 / S1: below, referred to as the heating density of the left IH heating coil) is the center IH It is determined whether it is larger than the ratio of the input power W3 of the central IH heating port to the heating coil area S3 (W3 / S3: hereinafter referred to as the heating density of the central IH heating coil) (step 105), and W1 / S1 is W3 / If it is greater than S3, the heating density of the left IH heating coil is higher, so the drive circuit 47 is controlled to suppress the output of the left IH inverter circuit 23, thereby reducing the sum of the input power and the left IH. The heating density of the heating coil is reduced to reduce the difference in heating density with the central IH heating coil (step 106). If the heating density of the left IH heating coil is not higher in step 105, the drive circuit 49 is controlled to suppress the output of the central IH inverter circuit 25, thereby reducing the sum of input power and for the central IH. The heating density of the heating coil is reduced (step 107).

  Even when the sum of the input power becomes equal to the power of the set thermal power in step 104, the heating density W1 / S1 of the left IH heating coil is compared with the heating density W3 / S3 of the central IH heating coil (step 108). . When the heating density of the left IH heating coil is higher, the routine proceeds to step 106 to suppress the output of the left IH inverter circuit, and when the heating density of the central IH heating coil is higher, the routine proceeds to step 107. Transition is performed to suppress the output of the central IH inverter circuit and reduce the difference in heating density between the left IH heating coil and the central IH heating coil.

  When the sum of the input powers becomes smaller than the set thermal power in step 104, the heating density W1 / S1 of the left IH heating coil is compared with the heating density W3 / S3 of the central IH heating coil (step 109). If the heating density of the left IH heating coil is lower, the drive circuit 47 is controlled to increase the output of the left IH inverter circuit (step 110), and the heating density of the left IH heating coil is the center. If it is not lower than the heating density of the IH heating coil, the drive circuit 49 is controlled to increase the output of the central IH inverter circuit 25 (step 111) to increase the sum of the input power and the left IH heating coil. And the difference in heating density between the central IH heating coils.

  The right integrated heating control process is performed in the same manner as the heating control process in the left integrated heating mode. In FIG. 20, first, the input voltage detection means 13, the input current detection means 15 and the output current detection means 18 for the right IH, the input current detection means 16 and the output current detection means 19 for the central IH are used, and the high frequency for the right IH is used. The input voltage and input / output current of the power supply circuit 9 and the central IH high frequency power supply circuit 11 are detected (step 201), and the detected output current of the right IH high frequency power supply circuit 9 and the output current of the central IH high frequency power supply circuit 11 are detected. It is determined whether there is an overcurrent (step 202). If it is an overcurrent, the corresponding drive circuit 48 or 49 is controlled to suppress the output current to suppress the output of the right IH inverter circuit 24 or the central IH inverter circuit 25 (step 203). When the output current is not an overcurrent in step 202, the input power (W2) of the right IH heating port obtained from the power corresponding to the set heating power, the input voltage detected in step 201, and the input current of the right IH / center IH. And it compares with the sum of the input power (W3) of the central IH heating port (step 204).

  When the sum of the input powers is larger, the ratio of the input power W2 of the right IH heating port to the heating coil area S2 of the right IH (W2 / S2: hereinafter referred to as the heating density of the right IH heating coil) is the center IH. It is determined whether it is larger than the heating density (W3 / S3) of the heating coil for use (step 205). If W2 / S2 is greater than W3 / S3, the heating density of the heating coil for the right IH is higher. The circuit 48 is controlled to suppress the output of the right IH inverter circuit 24, to reduce the sum of input power, and to reduce the heating density of the right IH heating coil to reduce the difference in heating density with the central IH heating coil. (Step 206). If the heating density of the right IH heating coil is not higher in step 205, the drive circuit 49 is controlled to suppress the output of the central IH inverter circuit 25, thereby reducing the sum of input power and for the central IH. The heating density of the heating coil is reduced (step 207).

  Even when the sum of the input powers becomes equal to the set thermal power in step 204, the heating density W2 / S2 of the right IH heating coil is compared with the heating density W3 / S3 of the central IH heating coil (step 208). . When the heating density of the right IH heating coil is higher, the routine proceeds to step 206 to suppress the output of the right IH inverter circuit, and when the heating density of the central IH heating coil is higher, the routine proceeds to step 207. Transition is performed to suppress the output of the central IH inverter circuit and reduce the difference in heating density between the right IH heating coil and the central IH heating coil.

  When the sum of the input powers becomes smaller than the set thermal power in step 204, the heating density W2 / S2 of the right IH heating coil is compared with the heating density W3 / S3 of the central IH heating coil (step 209). When the heating density of the right IH heating coil is lower, the drive circuit 48 is controlled to increase the output of the right IH inverter circuit (step 210), and the heating density of the right IH heating coil is the center. If the heating density is not lower than the heating density of the IH heating coil, the drive circuit 49 is controlled to increase the output of the central IH inverter circuit 25 (step 211) to increase the sum of the input power and the right IH heating coil. And the difference in heating density between the central IH heating coils.

  As described above, it is possible to select from a plurality of heating positions in the left integrated heating mode or the right integrated heating mode, and to heat a pot having a diameter larger than the diameter of the heating coil included in the induction heating cooker with a plurality of heating coils. At that time, in consideration of the area of the heating coil, control is performed to suppress the difference in heating density with a plurality of heating coils, and cooking can be performed with reduced heating unevenness when a large-diameter pan is used. .

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Top plate, 3a-c Cooking container mounting position display, 4 Operation input part, 4a Operation part of left IH heating port, 4b Operation part of right IH heating port, 4c Operation part of central IH heating port, 4Fa Left IH off switch, 4Fb Right IH off switch, 4Fc Center IH off switch, 4Da Left IH fire reduction switch, 4Db Right IH fire reduction switch, 4Dc Center IH fire reduction switch, 4Ua Left IH heating increase switch, 4Ub Right IH heating increase Switch, 4Uc Central IH thermal power increase switch, 4ac Left integrated heating switch, 4cb Right integrated heating switch, 5 Display unit, 5a Left IH thermal power display unit, 5b Right IH thermal power display unit, 5c Central IH thermal power display unit, 5ac Left integrated display Lamp, 5cb Right integrated display lamp, 5f 5g 5h 5k 5m 5n LED group, 6 Commercial AC power supply, 7 Left I High frequency power supply circuit for H, 8 10 12 load circuit, 9 high frequency power supply circuit for right IH, 11 high frequency power supply circuit for central IH, 13 input voltage detection means, 14-16 input current detection means, 17-19 output current detection means, 20 to 22 DC power supply circuit, 23 to 25 inverter circuit, 26 to 28 rectifier circuit, 29 to 31 choke coil, 32 to 34 smoothing capacitor, 35 to 37 high potential side switching element, 38 to 40 low potential side switching element, 41 ˜46 diode, 47˜49 drive circuit, 50 left IH heating coil, 51 right IH heating coil, 52 central IH heating coil, 53˜55 resonant capacitor, 56˜58 clamp diode, 59 control unit, 60a˜d Cooking container, P0-2 pitch, S1-3 coil area, W1-3 input power

Claims (5)

A plurality of heating coils;
An inverter circuit for supplying a high-frequency current to each of the heating coils;
An operation input unit for setting each heating output of the heating coil;
A display unit for displaying each heating output state of the heating coil;
A control unit that receives the operation input from the operation input unit and controls the inverter circuit;
With
The induction heating cooker, wherein the control unit has a heating output integrated mode in which two or more heating coils are integrally heated and output. The heating coil is formed from three or more,
The control unit is
Having a plurality of heating output integrated modes for heating and outputting the two heating coils as a unit;
The induction heating cooker according to claim 1, wherein the heating output integrated mode can be switched.   The induction heating cooker according to claim 1 or 2, wherein among the heating coils integrated in the heating output integrated mode, at least one heating coil is wound in an elliptical shape. The display unit is
The heating output state of the heating coil when controlling in the heating output integrated mode,
The induction heating cooker according to any one of claims 1 to 3, wherein a display mode is changed depending on a heating output state when the heating coils are individually controlled. The control unit is
The induction heating cooker according to any one of claims 1 to 4, wherein when heating output is performed in the heating output integrated mode, a difference in heating density of corresponding heating coils is suppressed.

Images