JP2001351773A - Cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooking device, capable of protecting control parts by driving a cooling fan motor, according to the state of a heating chamber even after a power supply switch is changed to off state. SOLUTION: In this cooking device, a remaining heat detection means 39 and a heat generation detecting means 40 are provided, and the cooling fan motor 30 is driven continuously, even after stoppage of driving of a roaster heater 28 and a heating coil 25, according to the state of the heating chamber. Hereby, the control parts are prevented from being exposed to high heat, being cooled by the cooling fan motor. regardless of existence of a remaining heat of a roaster and existence of combustion of material to be heated inside the roaster, and simultaneously the operation opportunity of the cooling fan motor can be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating or induction heating cooking device for cooling components to be controlled by driving a cooling fan.

[0002]

2. Description of the Related Art Conventionally, in a heating cooker having an induction heating cooker and a heating cabinet having a heating element therein, the residual heat of the heating cabinet after the completion of cooking causes the temperature of the electronic components to rise and cause malfunction or breakage. In order to prevent the problem, a technique for driving the cooling fan even after the power switch is turned off is disclosed in JP-A-7-272.
No. 846 or JP-A-7-272847 is known. Also, in the above-mentioned document,
After the power switch is turned off, the heating means is stopped to prevent the cooling fan from continuing to operate for a long time after the heating means of the heating chamber stops or after both the frequency converter and the heating means stop. There is also described a technique for prohibiting the driving of the fan motor means after a predetermined period of time by a timer means after the frequency conversion device and the heat generating means have stopped both.

[0003]

After the above-mentioned heating means is stopped or after both the frequency converter and the heating means are stopped, the timer means is used to measure the time, and the driving of the fan motor means is prohibited after a predetermined time. After the heating means is stopped, or when a predetermined time has elapsed after both the frequency converter and the heating means have stopped, the cooling fan is driven regardless of the output of the temperature detecting means for monitoring the temperature of the heating element. Stop. Therefore, if the object to be heated in the heating chamber continues the combustion generated during heating for some reason even after the end of cooking, or if the object to be heated starts burning immediately after the heating is stopped, the combustion continues for a long time. Then, after the time counting by the timer means is completed, that is, combustion continues even after the cooling fan is stopped, and the temperature around the heating chamber becomes high, which may deform nearby resin or break electronic components. In such a case, it is required that the cooling fan does not stop.

[0004] The present invention solves the above-mentioned problem, and prevents the cooling fan from continuing to operate for a long time after the power switch is turned off or after both the heating means and the frequency conversion device are stopped, If new heat is generated inside the heating chamber apart from the heating means, such as when the heated object burns, the operation of the cooling fan is continued in response to this, and the deformation of the resin around the heating chamber and the The purpose is to prevent destruction from occurring.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a heat generation detecting means for detecting the presence or absence of new heat generation in a heating chamber different from the heating means. According to the detection result of the means, the drive end timing of the cooling fan depending on the time measurement result of the time measuring means is changed.

The above means prevents the cooling fan from continuing to operate for a long time after the heating of the heating means in the chamber is stopped, and generates new heat in the heating chamber when an object to be heated is burned. Even in this case, a heating cooker capable of preventing the deformation of the resin around the heating chamber and the destruction of the electronic components can be obtained by performing the cooling by continuing the operation of the cooling fan in response to this.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION
A heating unit for heating the object to be cooked in the heating cabinet or a frequency converter for supplying a high-frequency current to the heating unit and the heating coil, and a temperature change of the heating unit or the heating cabinet can be observed. Temperature detection means, a cooling fan for cooling at least parts of the frequency conversion device, a detection result of the temperature detection means, a timing of stopping a heating operation of the inside heating means or heating of the inside heating means and the frequency conversion device. A fan that enables the cooling fan to be driven even after the heating operation of the frequency conversion device or another heating unit is stopped, based on the timing result of the timing unit that starts the timing operation in association with the timing at which the operation stops are both stopped. With a driving means, except for the heat generated by the interior heating means,
A heating cooker provided with heat generation detecting means for detecting the presence or absence of new heat generation in the heating chamber, and changing the drive end timing of the cooling fan according to the detection result of the heat generation detecting means. .

[0008] In the above embodiment, from the detection result of the inside heating means or the temperature detecting means capable of observing the temperature change of the heating chamber, the heating chamber which has generated heat during cooking, the electronic component or the electronic component in the apparatus after the cooling fan stops. Presence or absence of heat influence on the resin parts is estimated, and if it is judged necessary, the cooling fan is continuously operated even after cooking is stopped.

The stop timing is determined based on the detection result of the temperature detecting means, or the timing of stopping the heating operation of the internal heating means or the timing of stopping both the internal heating means and the heating operation of the frequency converter. By the timing means for starting the timing operation, the stop timing of the cooling fan is determined, and the cooling fan can be continuously operated for a predetermined time as needed. This prevents the cooling fan from stopping at the same time as the heating operation is stopped, preventing the temperature of the electronic components or resin components in the device from rising due to the residual heat of the heating cabinet, thereby reducing reliability, and preventing deterioration and deformation. Conversely, it is possible to prevent the cooling fan from operating unnecessarily for a long time and causing annoying users.

[0010] In addition to the heat generated by the internal heating means,
And, since the heat generation detecting means for detecting the presence or absence of new heat generation in the heating chamber is provided, after the heating is stopped, the burning of the food generated during the heating in the heating chamber continues, or immediately after the heating is stopped. It is possible to detect the occurrence of combustion of the food. Based on the detection result, by changing the drive end timing of the cooling fan based on the timing result of the timing unit, if the burning of the food in the heating chamber continues after the heating is stopped, the time measured by the timing unit is changed. Extend it,
The operation of the cooling fan can be extended. Therefore,
After stopping cooking, even if new heat is generated or continued, such as burning of food, it has the effect of preventing the temperature rise of electronic parts or resin parts in the equipment, and their reliability will be reduced. , Deterioration and deformation can be prevented.

According to a second aspect of the present invention, in the first aspect, the heat generation detecting means determines the drive end timing of the cooling fan based on the result of the time measurement by the time detection means based on the detection result of the temperature detection means after the end of the heating. It is intended to be changed.

In the above embodiment, by observing the level of the temperature detected by the temperature detecting means, the state of inclination or change, etc., it is possible to accurately determine whether or not the object to be heated is generating new heat by combustion. The same temperature detection element can be used to detect the heat generated by the heating chamber during cooking, the residual heat of the heating chamber after cooking, and the detection of heat generation due to the burning of the cooked food after cooking, using a microcomputer, etc. Thus, the circuit configuration can be simplified, and the same effect as in the first aspect can be obtained.

According to a third aspect of the present invention, in the first aspect, when the cooling fan is stopped at a predetermined timing and the generation of new heat is observed based on the detection result of the temperature detecting means thereafter. Determines the re-driving of the cooling fan, which has the effect of shortening the operating time of the cooling fan, suppressing power consumption, and extending the life of the cooling fan.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows one induction heating coil for heating with a high-frequency magnetic field in Embodiment 1 corresponding to the first and second aspects of the present invention, and a heater inside a heating chamber. FIG. 2 is a circuit block diagram of a built-in type heating cooker having one roaster having a heating element heater (hereinafter referred to as a roaster heater) for heating by the heat generated by its own resistance. FIG. It is a perspective view.

In FIG. 2, reference numeral 1 denotes a top plate on which a pan is mounted, and a pan is placed on an upper surface;
Reference numerals 4 denote exhaust ports, which are provided at the rear of the top frame 2 respectively.
Reference numeral 5 denotes a U-shaped chassis whose upper surface opening is closed by the top plate 1 and is vertically divided by a partition plate 6 inside. The chassis 5 is provided with a substrate base 7 formed in a U-shape on the upper part of the partition plate 6, and a gap 6 a serving as a cooling passage is provided between the bottom surface and the partition plate 6 so that the cooling air can pass therethrough. Is formed. Substrate base 7
Is a switching semiconductor cooling fin at the top of the bottom,
Inverter parts such as resonance capacitors and choke coils, and control parts such as microcomputers (not shown)
The printed wiring board 8 to which is mounted and connected is fixed. Reference numeral 9 denotes an exhaust port facing the front upper portion of an outer housing composed of the top plate 1, the chassis 5, etc., and reference numeral 10 denotes a cooling fan, which is located at a lower portion of the intake port 3 for sucking outside air and cooling air. While blowing out in eight directions and flowing through the cooling passage 6 a, heat exchange is performed with the control component and surrounding members, and the air is exhausted from the exhaust port 4 and the exhaust port 9. Reference numeral 11 denotes a front panel provided on the front surface of the outer housing, and has a door portion 13 of a roaster heater heating chamber. 1
Reference numeral 2 denotes a chimney connected to a heating chamber as a roaster, and reference numeral 14 denotes a heating coil, which is provided below the top plate 1 at a position indicated by a wavy line.

In FIG. 1, reference numeral 21 denotes a commercial power source, 22 denotes a power switch, one end of which is connected to the commercial power source 21, and the other end of which is connected to an input terminal of a rectifier (full-wave rectifier) 23. The rectifier 23 has its positive output terminal connected to the input terminal of the inverter circuit 24. The inverter circuit 24 includes a heating coil 25, a resonance circuit block 26 including a resonance capacitor and a filter component, and an IGBT 27 as a semiconductor switching element. A series circuit of a roaster heater 28 and a relay 29 as a heating unit in the refrigerator is connected to a commercial power supply via a power switch 22. The series circuit of the cooling fan motor 30 and the relay 31 is connected to a commercial power supply.

The power supply circuit 32 is composed of a switching power supply circuit whose input and output terminals are not insulated, and has a common potential of I
One end of the input terminal is connected to the commercial power supply terminal of the power switch 22 via a series circuit of a diode 33 and a relay 35, and is also connected to the load terminal of the power switch 22 via a diode 34. are doing. The output terminal of the power supply circuit 32 supplies the control power of all the control circuit blocks and has a common potential, which is not shown in FIG. The power switch (hereinafter referred to as SW) detecting means 36 has its input terminal connected to the positive electrode of the rectifier 23, and the output signal is the roaster driving means 4 for turning on and off the relay 29.
9. Output to the IH control means 37 for controlling the IGBT 27 and the cooking end detecting means 43, respectively. From the roaster driving means 49, a signal is also output to the residual heat detecting means 39.

The thermistor 47 (temperature detecting means) is fixed to the wall surface of the heating chamber in which the roaster heater 28 is stored, and outputs a temperature signal to the temperature detecting means 38. On the other hand, the temperature detecting means 38 detects the temperature by measuring the resistance value of the thermistor 47. The output signal of the temperature detecting means 38 is other than the heat generated by the residual heat detecting means 39, the internal heating means, and the heat generation detecting means 40 for detecting the presence or absence of new heat generation in the heating chamber and the power relay. Drive means 42
Respectively. The output signal of the residual heat detecting means 39 is output to the first timer 44 and the fan driving means 41, respectively. When the output signal of the temperature detection unit 38 and the output signal of the first timer 44 are input, the heat generation detection unit 40 outputs the output signals to the fan drive unit 41 and the power supply relay drive unit 42.
And the second timer 45. The fan drive unit 41 turns on and off the relay 31 of the cooling fan motor 30 when a signal is input from the residual heat detection unit 39, the heat generation detection unit 40, and the cooking end detection unit 43.

When the output signals of the temperature detecting means 38, the first timer 44, and the second timer 45 are input, the heat generating detecting means 40 outputs the fan driving means 41, the power relay driving means 42, and the heat generation notifying signal. A signal is output to the means 48 and the second timer 45, respectively. Cooking end detecting means 43
Is the operation unit 46 of the front panel 11, the power SW detection means 3
6, and outputs a signal to the fan driving means 41. The first timer 44 outputs the output signal to the residual heat detecting means 39 and the heat generation detecting means 40, respectively. The second timer 45 outputs the output signal to the power relay driving unit 4.
2 and the heat generation detecting means 40, respectively, and the power supply relay driving means 42 outputs the relay 35
On and off.

The operation of the heating cooker having the above configuration will be described. When the power switch 22 is turned on, the power circuit 3
Since power is supplied to the input terminal 2 via the diode 34, a smoothed DC power supply voltage is output to the output terminal of the power supply circuit 32. The DC power supply voltage of the power supply circuit 32 is supplied to each circuit block as control power, and each circuit block enters a standby state.

Next, when an operation command of the heating coil 25 is inputted by an input key of the operation unit 46, the operation unit 46 outputs a heating command to the IH control means 37, and the IH control means 37
The BT 27 is driven to operate the inverter circuit 24 to supply a high-frequency current of about 20 kHz to the heating coil. Also,
A cooking start signal is output from the cooking end detecting means 43 to the fan driving means 41 according to a signal from the operation section 46, and the fan driving means 41 turns on the relay 31 to operate the cooling fan motor 30.

Subsequently, when an operation command of the roaster heater 28 is inputted by an input key of the operation section 46, the operation section 46 outputs a heating command to the roaster driving means 49, and as a result,
The roaster driving means 49 turns on the relay 29 and causes the roaster heater 28 to generate heat by energization. Then, when the roaster heater 28 generates heat and the wall temperature of the heating chamber becomes 90 ° C. or higher, the temperature detecting means 38 to which the signal indicating that the resistance of the thermistor 47 has been changed outputs a driving signal to the power relay driving means 42, The relay 35 is turned on.

Thus, the heating coil 25 for induction heating
When the power switch 22 is turned off while the roaster heater 28 for electric heating is performing a heating operation, the main current is cut off and the power SW detection means 36
Of the power switch 22 is detected by detecting that the positive electrode potential of the power switch 22 has dropped, and an off signal of the power switch 22 is output. When the off signal of the power switch 22 is input to the roaster driving means 49 and the IH control means 37, the roaster driving means 49 outputs the driving signal of the relay 29,
Then, the IH control means 37 stops the output of the drive signal of the IGBT 27, respectively. Also, the power SW detection means 36
Transmits the off signal of the power switch 22 to the cooking end detecting means 4
3, and the cooking completion detecting means 43 to which the OFF signal is inputted outputs an OFF signal to the fan driving means 41 to open the relay 31 and stop the operation of the cooling fan motor 30.

The roaster driving means 49 receives an OFF signal of the power switch 22 or operates the operation section 46.
In order to stop the driving of the roaster heater 28 by inputting a power-supply stop command for the roaster, a roaster-off signal is output to the residual heat detecting means 39. Then, the residual heat detecting means 39
When the roaster-off signal is input,
When the detected temperature input from the temperature detecting means 38 is lower than 90 ° C., a driving stop signal of the relay 31 is output to the fan driving means 41.

On the other hand, when the roaster-off signal is input, the remaining heat detecting means 39 relays to the fan driving means 41 if the detected temperature input from the temperature detecting means 38 is 90 ° C. or more. A drive start signal is output to the first timer 44 without outputting the drive stop signal at 31.
Then, when the measurement time reaches 10 minutes, the first timer 44 outputs a time-up signal to the remaining heat detection means 39 and the heat generation detection means 40. When the time-up signal of the first timer 44 is input or the detected temperature input from the temperature detecting unit 38 is lower than 90 ° C., the residual heat detecting unit 39 outputs a drive stop signal to the fan driving unit 41.

On the other hand, the heat generation detecting means 40 includes a first timer 4
When the time-up signal of 4 is inputted, if the detected temperature inputted from the temperature detecting means 38 at that time is lower than 150 ° C., a drive stop signal of the relay 31 is outputted to the fan driving means 41 and the power supply relay driving means 42 Also relay 3
5 is output.

In the above situation, the heat generation detecting means 4
0 indicates that the detected temperature input from the temperature detecting means 38 is 150
If the temperature is equal to or higher than 0 ° C., the driving stop signal of the relay 31 is not output to the fan driving unit 41, the driving stop signal of the relay 35 is not output to the power supply relay driving unit 42, and the timing start signal is output to the second timer 45. At the same time, a display signal is output to the heat generation notifying unit 48, and the heat generation notifying unit 48 performs a visual or audible display (notification) indicating that heat is generated in response thereto. The second timer 45 is set to 60
When minutes have elapsed, a time-up signal is output to the heat generation detecting means 40 and the power relay driving means 42.

When the heat generation detecting means 40 receives a time-up signal from the second timer 45, it outputs a cooling fan driving stop signal to the fan driving means 41. On the other hand, the power relay driving means 42 also turns off the relay 35 when the time-up signal is input from the second timer 45, and cuts off the power supply to the power circuit 32 if the power switch 22 is off at that time. Become.

When the driving of the roaster heater 28 and the heating coil 25 are both stopped by an input operation to the operation unit 46, the cooking end detecting means 43 outputs a driving stop signal of the cooling fan motor 30 to the fan driving means 41. When a cooling fan drive signal is input from at least one of the remaining heat detecting means 39, the heat generation detecting means 40, and the cooking end detecting means 43, the fan driving means 41 turns on the relay 31 and drives only the cooling fan motor 30.

As described above, according to this embodiment, if either the roaster heater 28 or the heating coil 25 is operating, the cooling fan motor 30 is operated, and the inverter circuit components and control components shown in FIG. The printed wiring board 8 to be mounted and connected and the resin-made substrate base 7 holding the printed wiring board 8 are prevented from being broken or deformed due to a rise in temperature. When the power supply to the heating coil 25 is stopped and the power supply to the roaster heater 28 is stopped and the temperature of the roaster wall is lower than 90 ° C., the power supply to the heating coil 25 is stopped and the cooling fan The motor 30 is stopped. In the above, when the temperature of the roaster wall surface is 90 ° C. or more due to the residual heat after cooking, the power supply to the roaster heater 28 is stopped, and the temperature of the roaster wall surface becomes lower than 90 ° C. or 90 minutes after 10 minutes.
If the temperature does not fall below ℃, the operation of the cooling fan motor 30 is stopped at that point, so that the cooling fan motor 30 continues to operate for a long time to shorten the time of giving an unpleasant sensation and give the user an uneasy feeling. Can be prevented, the operation opportunity of the cooling fan motor 30 can be reduced, and the life can be prevented from being shortened.

Further, in the above, if the roaster wall temperature is 150 ° C. or more after 10 minutes, the cooling fan motor 30 is further operated for 60 minutes. Even if the temperature of the roaster wall surface is high due to the combustion of the object to be heated or the like, the combustion of the object to be heated is stopped during that time, and the temperature of the control parts and the like can be sufficiently reduced.

Accordingly, when the heating operation of the cooling fan motor 30 is stopped, the temperature of the control parts or the resin parts in the equipment rises due to the residual heat of the heating chamber and the burning of the cooked food, thereby lowering the reliability or deteriorating. Deformation can be prevented, and conversely, it can be avoided that the cooling fan motor 30 operates unnecessarily for a long time and the above-mentioned disadvantageous situation occurs.

Further, the heat generation detecting means 40 stops the driving of the cooling fan motor 30, and at the same time, turns off the input of the power supply circuit 32 and cuts off the control power, so that the standby power can be suppressed.

In the above embodiment, when the heat generation detecting means 40 receives the time-up signal of the first timer 44, it outputs a signal for temporarily stopping the driving of the cooling fan motor 30 to the fan driving means 41. Cooling fan motor 3
While 0 is stopped, the temperature of the detected temperature output from the temperature detecting means 38 or the state of a temperature change (such as a slope) is observed, and oil or the like accumulated in an object to be heated or a pan or the like inside the heating chamber. Is burned, and if heat generation other than the heat generated by the roaster heater is recognized, the cooling fan motor 30
May be driven. According to this configuration, the chance of stopping the cooling fan motor 30 can be increased, so that the life of the cooling fan motor 30 can be extended.

In the above embodiment, the heat generation detecting means 40
Is configured to detect the combustion of an object to be heated in the roaster based on the detection result of the wall surface temperature of the roaster measured by the thermistor 47 and the temperature detecting means 38, but the measuring place and the temperature detecting element are not limited to this. Instead, it is only necessary to use a thermostat or other temperature sensor, or to measure at a location that changes depending on the temperature of the roaster heater 28 or the roaster wall surface. It may be configured by detecting infrared rays, carbon dioxide, and the like that generate combustion.

(Embodiment 2) FIG. 3 is a circuit block diagram of a main part of a heating cooker according to Embodiment 2 corresponding to the third aspect of the present invention. In the invention of this embodiment, the function of the second timer in FIG. 1 is eliminated, and the function of the heat generation detecting means is different from that of the invention in the first embodiment. The detailed description will be omitted by attaching the same reference numerals, and different points will be mainly described.

When the time-up signal is input from the first timer 44, the heat generation detecting means 50 determines the timing for outputting the drive stop signal to the fan driving means 41 based only on the temperature information input from the temperature detecting means 38. It is.

In the above embodiment, the roaster driving means 4
When the drive state 9 changes from the drive state to the drive stop state, a signal indicating the drive stop is output to the residual heat detecting means 39. Residual heat detection means 3
9 receives this signal and outputs a drive stop signal to the fan driving means 41 when the detected temperature input from the temperature detecting means 38 is lower than 90 ° C. Detection temperature is 90 ° C
In the above case, a timing start command is output to the first timer 44. When the counted time reaches 10 minutes, the first timer 44 outputs a time-up signal to the heat generation detecting means 50. When the heat generation detecting means 50 inputs the time-up signal, the detected temperature inputted from the temperature detecting means 38 at that time becomes 15
If the temperature is lower than 0 ° C., it is determined that there is no combustion of the object to be heated in the roaster, and a driving stop signal is output to the fan driving means 41. If the detected temperature is equal to or higher than 150 ° C., it is determined that the combustion of the object to be heated is continuing or its influence remains, and the heat generation detecting unit 50 outputs the drive stop signal until the detected temperature becomes equal to or lower than 90 ° C. With a delay, the cooling by the cooling fan 10 is performed to quickly lower the detected temperature.

As described above, according to the present embodiment, when the residual heat is detected after the cooking in the heating chamber is completed, the upper limit of the operation time of the cooling fan motor 30 is determined by the timer to obtain the normal cooling action. When the heat generation detecting means 50 detects the continuation of combustion of the object to be heated, the temperature of the wall surface of the heating chamber becomes 90 ° C. based on only the temperature information input by the temperature detecting means 38 without depending on the timing means. Since the cooling fan motor 30 is driven until the following conditions are satisfied, the cooling fan motor 30 can be stopped when it is determined that combustion has ended, and the resin and electronic components disposed around the heating chamber can be deformed. And reliability can be reliably prevented from lowering.

When the heat generation detecting means 50 detects a new heat generation after stopping the cooking, the heat generation is notified until it is confirmed that the temperature of the heating chamber has been sufficiently lowered, so that the heat is quickly generated to the user. The object to be heated can be removed, and the cause of the continuous operation of the cooling fan motor can be notified to eliminate anxiety.

[0042]

As described above, according to the first aspect of the present invention, after cooking is completed, the cooling fan is continuously operated as necessary, and new heat such as residual heat of the heating cabinet or combustion of the cooked food is obtained. The occurrence or continuation of excessive heat can prevent the temperature of electronic components or resin components inside the equipment from rising, thereby reducing reliability, and preventing deterioration and deformation. It is possible to avoid the user's harassment due to the time operation.

According to the second aspect of the present invention, it is possible to accurately determine whether or not the object to be heated is generating new heat by combustion by the temperature detecting means. When using temperature information from an over-temperature prevention circuit for preventing the temperature or the component temperature of the frequency conversion device from becoming too high, and temperature detection means used as temperature adjustment means for automatically cooking the food, An inexpensive and safe cooking device can also be provided.

According to the third aspect of the present invention, the same effects as those of the first aspect are obtained, the operation opportunities of the cooling fan are reduced, the power consumption is suppressed, and the life of the cooling fan can be extended.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the heating cooker in which main parts are cut away.

FIG. 3 is a block diagram of a main part of an electric circuit of a cooking device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cooling fan 13 Roaster (heating chamber) 14, 25 Heating coil (heating means) 24 Inverter circuit (frequency conversion device) 28 Roaster heater (in-chamber heating means) 30 Cooling fan motor 38 Temperature detecting means 40, 50 Heat generation detecting means 41 fan driving means 44 first timer (time measuring means) 45 second timer (time measuring means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Yamashita 1006 Kadoma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Yuji Fujii 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Daizo Ogata 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 3K051 AA02 AA08 AB10 AC33 AD25 AD28 3K086 BA04 CA03 CB04 CD01 CD10 DB21

Claims (3)

[Claims] An internal heating means for heating an object to be cooked in a heating chamber or a frequency converter for supplying a high-frequency current to the internal heating means and a heating coil; and a temperature of the internal heating means or the heating chamber. A temperature detecting means capable of observing a change, a cooling fan for cooling at least parts of the frequency converter, a detection result of the temperature detecting means and a timing of stopping a heating operation of the internal heating means or a frequency conversion between the internal heating means and the internal heating means. The cooling fan can be driven even after the heating operation of the frequency conversion device or other heating means is stopped, based on the timing result of the timing means that starts the timing operation in relation to the timing at which the heating operation of the device is stopped together. And a heat generation detecting means for detecting the presence or absence of new heat generation in the heating chamber other than the heat generated by the inside heating section. A heating cooker configured to change a drive end timing of the cooling fan based on a result of the time measurement by the heat generation detecting means, based on a detection result of the heat generation detecting means. 2. The heat generation detecting means measures the time based on the detection result of the temperature detecting means after the timing of stopping the heating operation of the internal heating means or the timing of stopping both the operation of the internal heating means and the operation of the frequency converter. 2. A heating cooker according to claim 1, wherein the drive end timing of the cooling fan is changed depending on the time measurement result of the means. 3. The heat generation detecting means switches the cooling fan at a predetermined timing after the timing of stopping the heating operation of the internal heating means or the timing of stopping both the heating operation of the internal heating means and the heating operation of the frequency converter. Stop,
2. The heating cooker according to claim 1, wherein a re-drive signal of the cooling fan is output based on a detection result of the subsequent temperature detecting means.