JP2015200434A - heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which, when it is connected to a 100 V commercial power supply, notifies it, and which can be used by shifting to a demonstration mode as necessary.SOLUTION: A heating cooker includes: a power supply switch 7 connected to a commercial power supply; an operation unit 27 for outputting an operation signal; a voltage detection circuit 14 for detecting a commercial power supply voltage; heating means (50a-50c, 51) for 200 V power supply voltage; a control circuit 26 for taking in the operation signal from the operation unit 27 and controlling the heating means (50a-50c, 51); and notification means (28, 29) for notifying an operation state. The control circuit 26, when the power supply switch 7 is turned on, determines whether or not the detection voltage of the voltage detection circuit 14 is the 100 V commercial power supply voltage, and when it is determined that the detection voltage of the voltage detection circuit 14 is the 100 V commercial power supply voltage, while maintaining a state where the heating means (50a-50c, 51) is not driven, allows the notification means (28, 29) to notify that the power supply is erroneously connected, and after that, when a specific operation signal is inputted from the operation unit 27, allows shift to a demonstration mode.

Description

  The present invention relates to a cooking device, and more particularly to a cooking device whose power supply voltage is standardized for 200V.

  2. Description of the Related Art Conventionally, there are some which have a function of executing a demo mode when a cooking device whose power supply voltage is standardized for 200V is connected to a commercial power supply of 100V. In this type of cooking device, when connected to a commercial power supply of 100 V, a demonstration mode is executed, and a display as if it is operating, for example, a thermal power LED is turned on according to the operation of the operation unit, or a liquid crystal display Characters were displayed on the LCD (LCD).

  There has also been proposed a cooking device that displays an error when connected to a commercial power supply of 100 V (see Patent Document 1).

Japanese Patent No. 38237979

  When a conventional cooking device whose power supply voltage is specified for 200V is connected to a commercial power supply of 100V, as described above, the demo mode (the heating operation is not performed, but the key operation, the thermal power display, and the operation contents are not performed). The control mode is as if the display is operating normally), but at that time, the user is not notified by an error display or the like, and only the current is not supplied to the heating coil. Met. For this reason, when the installation is completed without recognizing that the installer is connected to a commercial power supply of 100V, the key operation, the thermal power display, and the liquid crystal display are operating normally. There was a problem that it was difficult to understand that it was incorrectly connected to the commercial power supply.

  Also, as shown in Patent Document 1 (Japanese Patent No. 38237979), when an error is displayed at the same time as the power is turned on when connected to a 100V commercial power supply, it is erroneously connected to the 100V commercial power supply. However, the demonstration mode is not mentioned, and there is a problem that it cannot be used as a demonstration mode with a 100 V commercial power supply.

  The present invention has been made to solve the above-mentioned problems. When connected to a commercial power supply of 100 V, the present invention notifies that fact and can be used by shifting to the demo mode as necessary. An object is to provide a cooking device.

  The cooking device according to the present invention includes a power switch connected to a commercial power source, an operation unit that outputs an operation signal, a voltage detection unit that detects a commercial power source voltage, a heating unit for a 200 V power source voltage, and the operation described above. A control unit that takes in an operation signal from a section and controls the heating unit, and a notification unit that notifies an operation state, and the control unit detects a voltage detected by the voltage detection unit after the power switch is turned on. Is determined to be a commercial power supply voltage of 100V, and if it is determined that the detection voltage of the voltage detection means is a commercial power supply voltage of 100V, the power supply is erroneously connected while maintaining the state where the heating means is not driven. When the specific operation signal is input from the operation unit, the notification mode is notified, and then the mode is shifted to the demo mode.

  According to the present invention, when connected to a commercial power supply of 100V, the notification means notifies the user so that the user can grasp it. Moreover, since the transition to the demo mode is enabled even in this state, the demo mode can be operated with a commercial power supply of 100V.

It is a top view of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a front view of the induction heating cooking appliance of FIG. It is a circuit diagram of the control system of the heating cooker of FIG. It is the flowchart which showed operation | movement of the induction heating cooking appliance of FIG. It is the figure which contrasted the function of demo mode with the function of normal mode.

Embodiment 1 FIG.
1 is a plan view of an induction heating cooker (hereinafter referred to as a heating cooker) according to Embodiment 1 of the present invention, and FIG. 2 is a front view of the heating cooker of FIG.
A heating cooker 100 according to the present embodiment includes an appliance main body (housing) 1. The upper part of the instrument body 1 is open, and the opening is covered with a top plate 2 made of heat-resistant glass. On the surface of the top plate 2, heating ports 5 a to 5 c are drawn on the front left and right and the rear center, which serve as a guide for placing an object to be heated. Induction heating coils 50a to 50c (see FIG. 3 to be described later) are arranged below the heating ports 5a to 5c (inside the instrument body 1). A part of the induction heating coils 50a to 50c (for example, the induction heating coil 50c) may be replaced with a radiant heater.

  Further, display units 3a to 3c (display areas) for displaying the operation states of the induction heating coils 50a to 50c are provided on the surface of the top plate 2 in the vicinity of the heating ports 5a and 5b. 3a-3c is comprised from the liquid crystal display device. The left display unit 3a is provided on the left side in front of the heating port 5a, the right display unit 3b is provided on the right side in front of the heating port 5b, and the entire display unit 3c is on the front side of the central portion of the top plate 2. Is provided. An upper surface operation / display unit 4 is provided on the front side of the display units 3a to 3c. The upper surface operation / display unit 4 includes, for example, a switch such as a push button switch and a display unit such as a power LED and a thermal LED.

  In addition, the front panel 6 of the appliance body (housing) 1 is provided with a power switch 7 for turning on the power and heating power dials 8a and 8b for adjusting the heating power of the induction heating coils 50a and 50b, respectively.

  In addition, a door 9 is provided at the center of the front of the instrument body (housing) 1, and a grill (not shown) is provided at the back of the door 9. The grill (heating chamber) will be described later. A heater 51 (see FIG. 3 described later) is disposed.

FIG. 3 is a circuit diagram of a control system of the heating cooker 100 of FIG.
In the heating cooker 100 of FIG. 3, the power switch 7 is connected to a plug 10 whose one terminal is connected to a commercial power source, and the other terminal is one end of the switches 11, 12, 13 and the voltage detection circuit 14. Are connected to each. The other end of the switch 11 is connected to the rectifier circuit 21, and the DC voltage rectified by the rectifier circuit 21 is supplied to the inverter circuit 22. The inverter circuit 22 generates a high frequency current and supplies it to the induction heating coil 50a. The other end of the switch 12 is connected to the rectifier circuit 23, and the DC voltage rectified by the rectifier circuit 23 is supplied to the inverter circuits 24 and 25. The inverter circuits 24 and 25 generate a high frequency current and supply it to the induction heating coils 50b and 50c. The other end of the switch 13 is connected to a grill heater 51, and a power supply voltage is supplied to the heater 51. Note that the heater 51 is a generic term for an upper heater and a lower heater respectively provided above and below the grill.

  The voltage detection circuit 14 corresponds to the voltage detection means of the present invention, and is composed of, for example, a voltage dividing circuit. The control circuit 26 is composed of, for example, a microprocessor. The control circuit 26 receives the detection voltage from the voltage detection circuit 14 and the operation signal from the operation unit 27. The control circuit 26 performs arithmetic processing on the input signals to generate the open / close control signals C1 to C3 of the switches 11, 12, and 13 and the control signals C4 to C6 of the inverter circuits 22, 24, and 25, and the switches 11, 12, 13 and the inverter circuits 22, 24, 25 are controlled, and the display unit 28 and the audio output unit 29 are controlled. The inverter circuits 22, 24, and 25 generate high-frequency currents based on the control signals C4 to C6 and supply them to the induction heating coils 50a to 50c.

  3 includes the switches of the upper surface operation / display unit 4 of FIGS. 1 and 2 and the thermal power dials 8a and 8b. Similarly, the display unit 28 includes the display units 3 a to 3 c of FIG. 1 and FIG. 2 and the display unit of the upper surface operation / display unit 4. The induction heating coils 50a to 50c and the heater 51 correspond to the heating means for the 200V power supply voltage of the present invention, the display unit 28 and the audio output unit 29 correspond to the notification unit of the present invention, and the control circuit 26 includes This corresponds to the control means of the present invention.

FIG. 4 is a flowchart showing the operation of the heating cooker according to the present embodiment.
When the user inserts the plug 10 into the outlet and turns on the power switch 7, the cooking device 100 is activated. The operation at this time is the same regardless of whether the power source of the outlet is 100V or 200V. For example, when the operation unit 27 is operated (for example, when the thermal power dial 8a is pushed and turned to enter a standby state) (S11), the control circuit 26 takes in the signal of the voltage detection circuit 14 and cooks it. It is determined whether the device 100 is connected to a 100V power supply (S12). Specifically, it is determined whether or not the detected voltage is 140 V or less, for example. Here, when the control circuit 26 determines that the detected voltage is, for example, 140 V or less, the display unit 28 (for example, the display unit 3 c) is connected to the 100 V power source while the heating unit for the 200 V power source voltage is not driven. Is displayed, and the voice output unit 29 is also guided by voice (S13). For example, “Connect to 100V power supply voltage. Check the power supply.” That is, when the installer finishes the construction without recognizing that the power supply is incorrectly connected to the 100 V power source, when the user turns on the power switch 7 of the cooking device 100 and operates the operation unit 27, the control circuit 26 is Guidance as described above. The user can grasp that it is erroneously connected to the 100V power supply by such guidance. The determination of the power supply voltage (S12) may be performed immediately after the operation of the operation unit 27 (S11) is omitted and the power switch 7 is turned on. However, after the operation of the operation unit 27 is started, there is an advantage that the display unit 28 (power supply LED and thermal power LED) can be checked.

  Moreover, in order to use this heating cooker as demo mode, it may connect with a 100V power supply darely. In order to respond to such a request, the control circuit 26 takes in the operation signal from the operation unit 27 and determines whether or not it is an operation signal in the demo mode (S14). As the operation signal in the demo mode, for example, a specific signal from the operation unit 27 (for example, an operation signal due to double pressing of a push button switch or the like) is determined as the operation signal in the demo mode. When the demo mode operation signal is input within a predetermined time (S15), the demo mode is executed (S16). In this demonstration mode, the heating operation is not performed, and even if the operation unit 27 is operated, the heating operation is not actually performed even if the heating operation is performed. That is, even when the operation unit 27 is operated, the control for closing the switches 11, 12, and 13 is not performed, and neither the induction heating operation nor the grill heating operation can be performed. If it is connected to a 100V power source and no demo mode operation signal is input even after a predetermined time has elapsed, the process is terminated (S15).

  If it is determined in the above-described determination of the power supply voltage that the power supply voltage is not the 100V power supply voltage (that is, it is determined that the power supply voltage is 200V), the operation proceeds to the normal mode operation (S17). In the operation in the normal mode, control for closing the switches 11, 12, 13 and control of the inverter circuits 22, 24, 25 are appropriately performed, and induction heating operation and grill heating operation are performed.

FIG. 5 is a diagram showing a comparison between the demo mode and the normal mode.
In the demonstration mode, the induction heating operation and the grill heating operation are not performed as described above, but the operation of the other operation unit 27 (button operation, thermal power dial operation, etc.) and the display unit 28 (LCD display, thermal power LED display). Is the same as in normal mode.

As described above, in the present embodiment, when the cooking device 100 is erroneously connected to the 100 V power source, the user can easily grasp that fact. For this reason, an installation contractor or an electric power company asks for re-construction of a power supply, and a heating cooker can be made into a normal operation | movement by correcting a power supply voltage to 200V. However, if it is not reported that the connection to the 100V power supply is incorrect as in the past,
(A) Since the display is operating normally but cannot be cooked, the user determines that the heating cooker body is defective and makes a complaint to the service department via the sales company.
(B) If the person in charge of the service department goes to the site, investigates the problem, and finds that it is incorrectly connected to the 100V power supply,
(C) Explain this to the user,
(D) The user asks the installer or the power company to reconstruct the power supply (the power department cannot perform the power supply work).
This process is required. However, in the present embodiment, the steps (a) to (c) are not required. This eliminates user frustration and reduces the service department load and extra work days.

  By the way, the installer of the heating cooker is supposed to carry out an energization test after the installation in order to confirm whether or not the construction has been carried out normally. Even in such a case, if the connection is erroneously made to the 100V power supply, the erroneous connection can be easily grasped. For this reason, the situation of handing over to a user with the state of a misconnection is avoided.

  Furthermore, even when the power supply voltage is 100 V, the operation that can shift to the demo mode functions effectively, so that it can be operated as the demo mode when used in an exhibition hall without a 200 V power source. For this reason, even if the power supply voltage is 100 V, the same operation and display as the product can be performed if the demo mode is entered.

  As described above, according to the present embodiment, it is possible to have both functions of notifying an error when the power supply is erroneously connected and using the demo mode.

  In the above-described embodiment, the example in which both the induction heating and the grill are provided as the heating means has been described. However, any one of the heating means may be used. Moreover, although the example provided with both the display part 28 and the audio | voice output part 29 as an alerting | reporting means was demonstrated, any one may be sufficient.

  DESCRIPTION OF SYMBOLS 1 Instrument main body, 2 Top plate, 3a-3c Display part, 4 Upper surface operation / display part, 5a-5c Heating opening, 6 Front panel, 7 Power switch, 8a, 8b Thermal power dial, 9 Door, 10 Plug plug, 11 13 switch, 14 voltage detection circuit, 21, 23 rectifier circuit, 22, 24, 25 inverter circuit, 26 control circuit, 27 operation unit, 28 display unit, 29 audio output unit, 50a to 50c induction heating coil, 51 heater, 100 Cooking cooker.

Claims (2)

A power switch connected to commercial power,
An operation unit for outputting an operation signal;
Voltage detection means for detecting commercial power supply voltage;
Heating means for 200V power supply voltage;
Control means for taking in an operation signal from the operation section and controlling the heating means;
An informing means for informing the operating state;
With
The control means determines whether or not the detected voltage of the voltage detecting means is a commercial power supply voltage of 100V after the power switch is turned on, and the detected voltage of the voltage detecting means is a commercial power supply voltage of 100V. If it is determined that the heating means is not driven, the notifying means is informed that the power supply is erroneously connected, and then when a specific operation signal is input from the operation unit, the mode is shifted to the demo mode. A cooking device characterized by that.   2. The cooking device according to claim 1, wherein when the control unit determines that the detection voltage of the voltage detection unit is not a commercial power supply voltage of 100 V, the control unit shifts to a normal mode in which the heating unit is driven.

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