JP4407562B2 - Induction heating device - Google Patents

Description

  The present invention relates to an induction heating apparatus provided with a plurality of display means for performing blinking, and in which blinking does not vary even when blinking of the same (or constant multiple) period occurs simultaneously.

  Conventionally, as shown in the block diagram of FIG. 7, this type of induction heating device is positioned below the top plate 102, on the top plate 102 on which the pan 101 is placed, and below the top plate 102. A heating coil 103 for heating the pan 101 by heating and a high temperature display means 107 for indicating that the top plate 102 is at a high temperature are provided. The high temperature display means 107 is a temperature of the top plate 102 or the pan 101 above the heating coil 103. (For example, refer to Patent Document 1). A high frequency current is supplied to the heating coil 103 by the inverter 104, an eddy current is induced on the bottom of the pan 101 placed on the top plate 102 near the top of the heating coil 103, the pan 101 is heated, and the top plate 102 receives the eddy current. Heat is conducted and the temperature of the top plate 102 rises. When the temperature detection means 105 installed below the top plate 102 determines that the temperature of the top plate 102 is high, the high temperature display means 107 turns on the high temperature display. The induction heating control means 106 adjusts the heating based on the temperature information by the temperature detection means 105, or the induction heating control means 106 stops the thermal power or suppresses the thermal power if a rapid temperature rise is detected. And it is set as the structure which alert | reports to a user by blinking display that it is in high temperature, when it detects that the temperature of the top plate 102 is high after a heating stop.

In addition, there is a configuration in which high temperature displays of several parts are displayed together as one due to space limitations.
JP 2002-134258 A

  However, in the above-described conventional configuration, in the induction heating apparatus having a plurality of heating means in the same main body, in order to clarify a plurality of high temperature locations, the high temperature notification is performed at a plurality of locations as close as possible to the high temperature location. It is easier for the user to understand, and since the user uses a plurality of heating means and the timing of finishing the heating is inevitably different, the blinking will be scattered even if the display has the same blinking cycle. There is also a problem that even if a flashing cycle is generated using a free-run timer, flickering such as turning on for a moment or turning off for a moment occurs at the start of blinking.

  The present invention solves the above-described conventional problems, and in an induction heating apparatus in which a plurality of blinking displays having the same period can be generated simultaneously, the blinking is quickly performed without flickering such as turning on or off for a moment. An object is to provide an induction heating apparatus with reduced variation.

In order to solve the conventional problems, an induction heating apparatus according to the present invention includes a top plate on which a pan is placed, a heating coil that heats the pan below the top plate, and power supplied to the heating coil. an induction heating control means for controlling a plurality of display means for displaying the thermal and cooking settings and temperature conditions, etc., the plurality of display means, each display blinking an periodic ON, the control for controlling at OFF signal And a synchronization correction means for periodically sending a synchronization signal to the control means for synchronizing the display blinking between the plurality of display means, the synchronization correction means based on the synchronization signal The cycle of the ON / OFF signal is divided into a plurality of periods, and a plurality of modes are assigned and subdivided. Even if the mode immediately after the start of the display blinking is the mode in the OFF period, the next mode Of the ON period The mode immediately after the start of the blinking is set to the ON period of the display blinking, even if the mode immediately after the start of the display blinking is the mode of the ON period. When the next mode is the mode of the OFF period, the display blinking synchronization correction is performed so that the mode immediately after the display blinking start time is set to the display blinking OFF period . Is.

  Thus, ON / OFF switching at the same timing can be performed by a timer that operates based on the synchronization signal, and it is possible to improve flicker because it is known in which state of the ON / OFF period the blinking starts.

  The induction heating device according to the present invention can reduce the tingling of blinking in spite of the same period and improve display quality by performing synchronization correction of the blinking period at the start of blinking and during blinking in a plurality of display means.

1st invention is the top plate which mounts a pan, the heating coil which heats the pan under the top plate, the induction heating control means which controls the electric power supplied to the heating coil, and the heating power cooking setting a plurality of display means for displaying the state and temperature state, etc., of the plurality of display means, a fixed period of ON each of blinking, and control means for controlling at OFF signal, among the plurality of display means, wherein Synchronization correction means for periodically sending a synchronization signal to the control means in order to synchronize display blinking, and the synchronization correction means sets the cycle of the ON and OFF signals to a plurality of periods based on the synchronization signal. If the mode immediately after the start of the display blinking is the mode in the OFF period , but the next mode is the mode in the ON period , At the start of the flashing Setting the mode immediately after the ON period of the display flash, the mode immediately after the start time of the display flashing a said mode of said ON period thereof following the mode is the mode of the OFF period In this case, by performing the synchronization correction of the display blinking so that the mode immediately after the start point of the display blinking is set to the OFF period of the display blinking, the timing reference of the synchronization signal and the blinking at that time are turned on. It is determined whether it is a period or an OFF period, and it is then determined whether the period is the ON period or the OFF period, so that the blinking state can be prevented from falling apart.

2nd invention is the top plate which mounts a pan, the heating coil which heats the pan under the top plate, the induction heating control means which controls the electric power supplied to the heating coil, and the heating power / cooking setting Between a plurality of display means for displaying a state / temperature state and the like, a plurality of control means for controlling each display blinking of the plurality of display means with an ON / OFF signal at a constant period, and the plurality of display means, Synchronization correction means for periodically sending a synchronization signal to each control means to synchronize the blinking of the display, and each control means has a plurality of cycles of the ON and OFF signals based on the synchronization signal. is divided into periods subdivide allocate multiple modes, the oN until it receives the next of said synchronization signal, the mode immediately before then receives the synchronization signal to control the display means by OFF signal Determine the previous Received when said Controlling the display means produces a flicker caused by momentary ON or OFF based on the synchronization signal, the display flashing ON in the mode immediately after then reception of the synchronizing signal, the OFF, the By switching the display to be the same as the display immediately before the next reception of the synchronization signal to synchronize the display blinking timing and performing the synchronization correction of the display blinking, even if one control means breaks down The control means operates and can control other display means, and even when the plurality of display means are not directly controlled, a timing reference of a synchronization signal periodically transmitted to all the control means that control the display means It is determined whether the blinking at that time is the ON period or the OFF period, and then it is determined whether the ON period or the OFF period is set next. Flashing if the control means have failed to send a not synchronizing signal to be control means fails all of the display means affected it is possible to prevent the fall apart.

Further, the control means, for example, the OFF period start of flashing immediately after the synchronization signal receiving, when the was just turned ON period of flashing the synchronization signal receiving immediately before, to force the OFF period start Instead of continuing the ON period for a certain period, it is possible to set the minimum ON period and to suppress the flickering of the display that is turned ON for a moment immediately after receiving the synchronization signal.

According to a third aspect of the invention, in particular, in the second aspect of the invention , each of the control means includes a display change that causes flickering in the ON period when the next synchronization signal reception point goes in a blinking cycle before the next synchronization signal reception point. By controlling the first ON period as the OFF period when it is the timing to switch to the OFF period after a short period of time, it is possible to set the minimum ON period and to turn on for a moment even at the start of lighting Display flicker can be suppressed.

According to a fourth aspect of the invention, in particular, in the second aspect of the invention , each control means includes a display change that causes flickering in the OFF period when the next synchronization signal reception time point goes in a blinking cycle before the next synchronization signal reception time point. By controlling the first OFF period as the ON period when it is the timing to switch to the ON period after a short period of time, it is possible to set the minimum OFF period and turn off for a moment even at the start of lighting Display flicker can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a block diagram of an induction heating apparatus according to the first embodiment of the present invention.

  In FIG. 1, the induction heating apparatus of the present embodiment includes a pan 1 that accommodates an object to be heated, a top plate 2 on which the pan 1 is placed, and heating that generates heat when electromagnetic induction occurs. The coil 3, the inverter 4 that supplies a high frequency current for electromagnetic induction in the heating coil 3, the temperature detection means 5 that detects the amount of heat on the top surface, and the temperature information and heating information from the temperature detection means 5 are supplied to the inverter 4. Inductive heating control means 6 for controlling the amount of electric power to be operated, operation means 9 for obtaining input information by the user's operation, a plurality of display means 7 for displaying the heating power, cooking setting state, temperature state, etc., and display means 7 Control means 8 for controlling the contents to be displayed and synchronization correction means 10 for synchronizing the blinking display among the plurality of display means are provided.

  The operation and action of the induction heating apparatus configured as described above will be described below with reference to FIG.

  First, the pan 1 in which the object to be heated is placed is placed on the top plate 2 above the left heating coil 3, and heating is started for cooking by the operating means 9 (step S1). Cooking is completed and heating is stopped (step S2).

  When the temperature detection means 5 determines that the temperature on the top plate 2 above the left heating coil 3 is high when the heating is stopped (step S3), it prepares to display a flashing high temperature notification on the display means 7. . Immediately after the synchronization signal is input, the OFF period start is defined. For convenience of description, the first half of the OFF period is mode 0, the second half of the OFF period is mode 1, the first half of the ON period is mode 2, and the second half of the ON period is mode 3.

  In addition, since it may be better to set more modes to prevent flickering depending on the length of the cycle, the modes may be increased as necessary.

  Whether the mode is not immediately after the input of the synchronization signal or the start of blinking is confirmed (step S4). If it is determined that the mode is 0 (step S5), the OFF period is set (step S6) because the mode does not immediately shift to the ON period. If the mode is not 0, it is next determined whether or not the mode is 1 (step S7). If the mode is 1, the mode may be immediately shifted to the ON period. However, the ON period is set (step S8).

  If the mode is not 1, it is next determined whether or not the mode is 2 (step S9), and if the mode is 2, since it does not immediately shift to the OFF period, the ON period is set (step S10). If the mode is not 2, the mode is 3, so it may turn off immediately (though this is not the case when the high temperature display is turned on during heating). Therefore, although it is originally an ON period, an OFF period is set (step S11). Next, the pan 1 in which the object to be heated is placed is placed on the top surface 2 above the right heating coil 3, and heating is started for cooking by the operating means 9 (step S12). Cooking is completed and heating is stopped (step S13). When the temperature detection means 5 determines that the temperature on the top plate 2 above the right heating coil 3 is high when the heating is stopped (step S14), preparations are made to flash the high temperature notification on the display means 7. To do. Whether the mode is not immediately after the input of the synchronization signal or the start of blinking is confirmed (step S15). If it is determined that the mode is 0 (step S16), the OFF period is set (step S17) because the mode does not immediately shift to the ON period. If the mode is not 0, it is next determined whether or not the mode is 1 (step S18). If the mode is 1, there is a possibility that the mode immediately shifts to the ON period. However, the ON period is set (step S19). If the mode is not 1, it is next determined whether or not the mode is 2 (step S20), and if the mode is 2, since it does not immediately shift to the OFF period, the ON period is set (step S21). If the mode is not 2, the mode is 3, so it may turn off immediately (though this is not the case when the high temperature display is turned on during heating). Therefore, although it is originally an ON period, an OFF period is set (step S22).

  In FIG. 3, the time chart of the induction heating apparatus in Embodiment 1 of this invention is shown. The control means A in the block diagram shown in the lower side of FIG. 1 operates as the control means 8 and the synchronization correction means 10 and controls the display means A, B, C, D, and E at a plurality of locations. In this case as well, by correcting in the same manner as described above, even if the flashing start timing is different, for example, as shown in the display means C and D, flicker due to a short display change can be eliminated and the flashing timing can be aligned. .

  As described above, in the present embodiment, the synchronization correction unit 10 creates a synchronization signal, subdivides the ON / OFF period based on the synchronization signal, creates a mode, and monitors the blinking start information sent from the control unit 8 As a result, the ON / OFF behavior of the blinking display in that mode is switched in the mode situation based on the synchronization signal sent from the synchronization correcting means 10 when the display means 7 starts blinking display. It is possible to reduce flickering such as instantaneously ON or instantaneously OFF.

(Embodiment 2)
FIG. 4 is a block diagram of the induction heating apparatus according to the second embodiment of the present invention.

  In FIG. 4, the induction heating apparatus of the present embodiment includes a pan 1 that accommodates an object to be heated, a top plate 2 on which the pan 1 is placed, and heating that generates heat when electromagnetic induction occurs. The coil 3, the inverter 4 that supplies a high frequency current for electromagnetic induction in the heating coil 3, the temperature detection means 5 that detects the amount of heat on the top surface, and the temperature information and heating information from the temperature detection means 5 are supplied to the inverter 4. Induction heating control means 6 for controlling the amount of electric power to be operated, operation means 9 for obtaining input information by the user's operation, a plurality of display means 7 for displaying thermal power, cooking setting state, temperature state, etc., and individual display means 7 is provided with individual control means 8 for controlling the contents displayed on the display 7 and synchronization correction means 10 for sending a synchronization signal to each control means 8 in order to synchronize the blinking display among the plurality of display means.

  The operation and action of the induction heating apparatus configured as described above will be described below with reference to FIG.

First, the pan 1 containing the object to be heated is placed on the top plate 2 above both the left and right heating coils 3, and heating is started in order to perform cooking with the operating means 9. Cooking on both the left and right ends and heating stops. When the temperature detection means 5 determines that the temperature on the top plate 2 above both the left and right heating coils 3 is high when the heating is stopped, a high temperature notification blinking display is performed on the display means 7. Each control means creates a mode based on the synchronization signal and starts transmitting the blinking display contents to the individual display means 7. The control means 8 periodically receives the synchronization signal, but until the next synchronization signal is received (step S101), the control means 8 performs blinking control according to each mode and sends display information to the display means 7 (step S101). S102). Immediately after the synchronization signal is input, the OFF period start is defined. For convenience of description, the first half of the OFF period is mode 0, the second half of the OFF period is mode 1, the first half of the ON period is mode 2, and the second half of the ON period is mode 3. When it is determined that the current mode is 0 when a synchronization signal is received from the synchronization correction means 10 (step S103), the mode is set to 0 and the OFF period is started as it is (step S104). If the current mode is not 0, it is next determined whether or not the mode is 1 (step S105). If it is determined that the current mode is 1, it is determined whether the current ON / OFF state is the OFF period or the ON period as usual (step S106) . If it is determined that the O N period, the mode is forcibly set to the ON period only when the mode 0 is switched to 0 (step S107). After mode 1, the original operation is continued until a synchronization signal is input (modes 0 and 1 are OFF periods, and modes 2 and 3 are ON periods). When it is determined that it is the OFF period, the mode is switched to 0 and the operation starts with the OFF period as the original operation (step S108). If it is determined in step S105 that the current mode is not 1, it is next determined whether or not the current mode is 2 (step S109). When it is determined that the current mode is 2, the ON period is forcibly set only when the mode is switched to mode 0 in order to prevent flickering immediately after turning ON (step S110). After mode 1, the original operation is continued until a synchronization signal is input (modes 0 and 1 are OFF periods, and modes 2 and 3 are ON periods). If the current mode is not 2, the current mode is 3. Therefore, when the mode is switched to 0 when the synchronization signal is received, the OFF period is set as the original operation.

  In FIG. 6, the time chart of the induction heating apparatus in Embodiment 2 of this invention is shown. The control means E in the block diagram shown in the lower side of FIG. 4 acts as the control means 8 and the synchronization correction means 10 or the synchronization correction means 10. In FIG. A synchronization signal is output to the control means A, B, C, and D for controlling B, C, and D. In this case, for example, by performing the same correction as described above, for example, the synchronization signal from the synchronization correction unit A is input in mode 2 of the control unit A, and during the synchronization signal mode 0, the ON period is continued as the mode 0 ′ and synchronized. By synchronizing from the mode 1 that comes next to the correction means A, it is possible to eliminate the flicker caused by a short-time display change and align the blinking timing.

As described above, in the present embodiment, the synchronization correction means 10 periodically sends a synchronization signal to each control means 8, and the control means 8 considers the synchronization signal and sends the display content to the display means 7. specific synchronization signal mode state has been set by the control means within 8 of the way even the next flashing display to switch the oN / OFF state of the blinking mode 0 after the synchronization signal receiving based upon receiving the Even if they are misaligned, they can be synchronized in the shortest time without flickering by turning them on or off for a moment.

  As described above, the induction heating device according to the present invention can synchronize blinking when a plurality of blinking displays of the same period occur simultaneously, so that two or three or more heating means are provided. It can also be applied to uses such as a cooking device equipped with a plurality of holding display means.

The block diagram of the induction heating apparatus in Embodiment 1 of this invention The flowchart which shows operation | movement of the induction heating apparatus in Embodiment 1 of this invention. Time chart of induction heating apparatus in Embodiment 1 of the present invention The block diagram of the induction heating apparatus in Embodiment 2 of this invention The flowchart which shows operation | movement of the induction heating apparatus in Embodiment 2 of this invention. Time chart of induction heating apparatus in embodiment 2 of the present invention Block diagram showing an induction heating device in a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pan 2 Top plate 3 Heating coil 4 Inverter 5 Temperature detection means 6 Induction heating control means 7 Display means 8 Control means 9 Operation means 10 Synchronization correction means

Claims (4)

A top plate on which the pan is placed, a heating coil for heating the pan below the top plate, induction heating control means for controlling the power supplied to the heating coil, heating power, cooking setting state, temperature state, etc. To synchronize the display blinking between the plurality of display means, the control means for controlling the display blinking of each of the plurality of display means by an ON / OFF signal having a constant period, and the plurality of display means. Synchronization correction means for periodically sending a synchronization signal to the control means, and the synchronization correction means divides the cycle of the ON and OFF signals into a plurality of periods based on the synchronization signal, and selects a plurality of modes. Even if the mode immediately after the start time of the display blinking is the mode in the OFF period, if the next mode is the mode in the ON period, immediately after the start time of the blinking the mode of Set de the ON period of the blinking, the in case the mode immediately after the start time of the display flashing a said mode of said ON period thereof following the mode which is the mode of the OFF period An induction heating apparatus that performs synchronous correction of the display blinking so that the mode immediately after the start point of the display blinking is set to an OFF period of the display blinking. A top plate on which the pan is placed, a heating coil for heating the pan below the top plate, induction heating control means for controlling the power supplied to the heating coil, heating power, cooking setting state, temperature state, etc. Synchronizing the display blinking between the plurality of display means, the individual display means of the plurality of display means, each control means for controlling the blinking of each display with an ON / OFF signal of a predetermined period, and the plurality of display means. Synchronization control means for periodically sending a synchronization signal to each control means, and each control means divides the ON / OFF signal cycle into a plurality of periods based on the synchronization signal. mode subdivided by assigning a, until it receives the next of said synchronization signal to determine the mode immediately before the next receiving said synchronization signal to control said display means the ON, the OFF signal, the next Received synchronization Wherein when the controlling the display means produces a flicker caused by momentary ON or OFF, the display flashing ON in the mode immediately after then reception of the synchronization signal on the basis of the item, the OFF, the synchronization signal Next, the induction heating apparatus is characterized in that the display blinking timing is synchronized by switching so as to be the same as the display immediately before reception and the synchronization of the blinking display is corrected. When each control means receives the next synchronization signal at the blinking cycle before the next synchronization signal reception time, the timing is changed to the OFF period after a short time when the display changes to cause flickering in the ON period. The induction heating apparatus according to claim 2, wherein the first ON period is controlled as an OFF period. When each control means receives the next synchronization signal at the blinking cycle before the next synchronization signal reception time, the timing is switched to the ON period after a short time when the display changes to cause flickering in the OFF period. The induction heating apparatus according to claim 2, wherein the first OFF period is controlled as an ON period.