JP2011094830A - Heating cooker - Google Patents

Abstract

There is provided a heating cooker that can cool a heating chamber rapidly without needing to perform a special operation every time cooking is completed, and is easy to use.
A heating chamber 15 having an opening 15d on the front surface for accommodating an object to be heated, a door 16 for closing the opening 15d of the heating chamber 15 so as to be openable and closable, a heat source 62 for heating air, and a heat source 62 A hot air fan 61 that blows air heated by the heating chamber 15, a door sensor 11 that detects the opening of the door 16, a heat source 62, and a controller 40 that drives and controls the hot air fan 61. When the door sensor 11 detects the opening of the door 16 for a predetermined waiting time Tw from the time when the door sensor 11 detects the opening of the door 16 after the end of the heating control, the control unit 40 drives the hot air fan 61 to cool it. Control is executed.
[Selection] Figure 2

Description

  The present invention relates to a cooking device that heats an object to be heated contained in a heating chamber, and more particularly to a cooking device that can quickly cool a heating chamber after cooking.

  Conventionally, in a heating cooker that heats an object to be heated housed in a heating chamber by a heating means such as a heater, the heating chamber becomes hot after the cooking by the heating means is finished, and this must be cooled to a temperature close to room temperature. The next cooking is not possible.

  Therefore, in Patent Document 1 below, a hot air fan that supplies hot air to the heating chamber with the door of the heating chamber opened by operating an operation key provided in the control unit every time cooking is completed, A cooking device has been proposed that operates in a state independent of the operation of the parts.

Japanese Patent Laid-Open No. 7-119974

  However, in the heating cooker as described above, the hot air fan that supplies hot air to the heating chamber with the door of the heating chamber opened is provided in the control unit in order to operate independently of the operation of other components. In addition, there is a problem that the operation keys have to be operated every time after the end of cooking, and the operation is troublesome. There is also a problem that the heating chamber cannot be rapidly cooled if the user neglects the key operation.

  The present invention has been made in consideration of the above-mentioned problems, and there is no need to perform a special operation every time cooking is completed, and the heating chamber can be rapidly cooled, and an easy-to-use cooking device is provided. The purpose is to do.

  A heating cooker according to the present invention includes a heating chamber having an opening on the front surface for accommodating an object to be heated, a door for opening and closing the opening of the heating chamber, a heat source for heating air, A hot air fan that blows air heated by a heat source into the heating chamber, a door sensor that detects opening of the door, and a control unit that drives and controls the heat source and the hot air fan, and heating control of the heat source After the end, when the door sensor detects the opening of the door continuously for a predetermined time from the time when the opening of the door is detected, the control unit drives the hot air fan to execute the cooling control. It is characterized by that.

  In the present invention, with the above configuration, it is not necessary to perform a special operation every time cooking is completed, and the heating chamber can be rapidly cooled.

It is a front view of the cooking-by-heating machine concerning one embodiment of the present invention. It is sectional drawing of the heating cooker of FIG. It is a block diagram which shows the electric constitution of the heating cooker of FIG. It is a time chart figure which shows the electric control of the heating cooker of FIG. It is a flowchart which shows the cooling control in the heating cooker of FIG. It is a figure which shows the relationship between the elapsed time from the time of the door sensor in the heating cooker of FIG. 1 detecting opening, and the rotation speed of a hot air fan.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the heating cooker 10 of the present embodiment is formed of an outer box 12 having a rectangular outer shape, and an inner box 14 having an open front surface is provided therein, and the inner box The inside of 14 is a heating chamber 15. The front opening 15d of the heating chamber 15 has a rectangular shape with a size that covers almost the entire width of the front surface of the cooking device 10.

  And the door 16 which can open and close the front opening part 15d of the heating chamber 15 is provided in the front surface of the heating cooker 10. FIG. This door 16 is pivotally supported by the front lower part of the heating cooker 10 through a hinge portion (not shown) so as to be pivotable in the vertical direction, and the door sensor 11 detects the open / closed state of the door 6.

  As shown in FIG. 1, a handle portion 17 is provided on the upper portion of the door 16, and an operation panel 18 having a plurality of operation portions 19 and a display portion 20 is provided on the lower portion.

  The operation unit 19 includes a selection key 19a for selecting and setting a cooking method for cooking, an operation key 19b for stopping cooling control to be described later, and the display unit 20 includes a dot matrix liquid crystal and the selected cooking method and cooking temperature. And so on.

  As shown in FIG. 2, the object to be heated placed on the shelf 21 with the door 16 opened is accommodated in the heating chamber 15. The shelf plates 21 are arranged substantially horizontally in a plurality of stages (for example, two stages) in the heating chamber 15 with different stages in the vertical direction by shelf receivers provided on the left and right side walls of the heating chamber 15. Moreover, the recessed part 25 dented toward the outer box is formed in the left-right one side wall of the heating chamber 15, The interior lamp which illuminates the inside of the heating chamber 15 in the recessed part 25 at the time of the door 16 opening, etc. 26 is stored.

  A machine room 22 is formed between the outer box 12 and the inner box 14 behind the heating chamber 15, a hot air circulation mechanism 60 that blows hot air into the heating room 15 inside the machine room 22, and a heating chamber. A temperature sensor 23 for detecting the temperature in 15 is provided.

  The hot air circulation mechanism 60 includes a hot air fan 61, a hot air heater 62, a casing 65, and a fan motor 66.

  The hot air fan 61 is, for example, a centrifugal fan, and is disposed in the hot air generation chamber 24 partitioned by the rear side wall 15 a of the heating chamber 15 and the casing 65. A fan motor 66 provided so as to be capable of phase control by a semiconductor element such as a phototriac is attached to the back surface of the casing 65, and the control unit 40 controls the drive of the fan motor 66 so that the hot air fan 61 can be arbitrarily controlled. Driven at the rotation speed. The hot air heater 62 is, for example, a heat source for heating air composed of a sheathed heater, and is disposed inside the hot air generation chamber 24 so as to surround the hot air fan 61.

  A suction port 67 is formed in the rear side wall 15a of the heating chamber 15 at a position facing the central portion of the hot air fan 61 by a large number of small holes, and the outlet 68 is formed at a position outside the outer peripheral portion of the hot air fan 61 in a front view. Is also formed by a large number of small holes.

  As shown in FIG. 3, the control unit 40 included in the heating cooker 10 includes the door sensor 11, the operation unit 19, the display unit 20, the temperature sensor 23, the interior light 26, the hot air heater 62, the fan motor 66, And the power supply 30 which supplies a power supply to the heating cooker 10 is connected. And the signal which sets the cooking method etc. which are input from the operation part 19 of the operation panel 18, the signal regarding the detected temperature Tr in the heating chamber 15 which is input from the temperature sensor 23, the door 16 which is input from the door sensor Based on a control program stored in the storage unit 42 made of a nonvolatile recording medium such as an EEPROM in response to an input of an open / close signal, the display unit 20 of the operation panel 18, the interior lamp 26, the hot air heater 62, and the fan The drive of the motor 66 is controlled.

  In the above configuration, when a signal for setting cooking control such as oven cooking is input from the selection key 19 a of the operation unit 19, the control unit 40 energizes the hot air heater 62 and the fan motor 66, whereby the hot air circulation mechanism 60. To work.

  As a result, the hot air fan 61 that is rotationally driven by the fan motor 66 sucks the air in the heating chamber 15 into the hot air generation chamber 24 from the suction port 67 of the rear side wall 15 a, and sends it out in the radial direction of the hot air fan 61. . The air sent from the hot air fan 61 contacts the hot air heater 62 and is heated to become hot air, and is blown out from the outlet 68 of the rear side wall 15a to the heating chamber 15. The hot air blown into the heating chamber 15 and traveling around the heating chamber 15 is sucked again into the hot air generation chamber 24 from the suction port 67 of the rear side wall 15a by the rotation of the hot air fan 61, so that the hot air generation chamber 24, the heating chamber 15, The temperature in the heating chamber 15 is increased so that the detected temperature Tr of the temperature sensor 23 becomes a predetermined temperature. The object to be heated accommodated in the heating chamber 15 is heated by forced convection heating by the operation of the hot air circulation mechanism 60 and the heating chamber 15 is heated by the heat radiation of the hot air heater 62.

  As shown in FIG. 4, the controller 40 energizes the hot air heater 62 and the fan motor 66 when a predetermined time elapses after the temperature in the heating chamber 15 is raised to a predetermined temperature (section (a) in FIG. 4). Is stopped, the hot air circulation mechanism 60 is stopped and the cooking control is finished, and then the cooling control for rapidly cooling the heating chamber 15 is started.

  Specifically, after the hot air circulation mechanism 60 is stopped and the cooking control is finished, in step S1 in FIG. 5, the door 16 is opened for a predetermined waiting time Tw (for example, Tw = 1 minute). When the door sensor 11 detects (section (b) in FIG. 4), in step S2, the control unit 40 determines whether the detected temperature Tr of the temperature sensor 23 is equal to or higher than a predetermined operating temperature Th (for example, Th = 100 ° C.). Judge whether or not.

  If the detected temperature Tr of the temperature sensor is equal to or higher than the operating temperature Th, the process proceeds to step S3 to start cooling control of the heating chamber 15, and if the detected temperature Tr of the temperature sensor is lower than the operating temperature Th, the heating chamber 15 is cooled. If it is not necessary, the process proceeds to step S4, the hot air fan 61 is kept stopped, and the heating chamber 15 is not cooled and the process is terminated.

  In step S3, the cooling of the heating chamber 15 is controlled by driving the fan motor 66 and rotating the hot air fan 61 at a predetermined rotational speed (section (c) in FIG. 4).

  In the cooling control of the heating chamber 15, by rotating the hot air fan 61 with the door 16 opened, external cold air is sucked into the heating chamber 15 from the opening 15 d to cool the heating chamber 15. The air sucked into the heating chamber 15 from the outside is taken into the hot air generating chamber 24 from the suction port 67 of the rear side wall 15a by the operation of the hot air fan 61, and blown out again to the heating chamber 15 from the outlet 68 of the rear side wall 15a. Then, it is discharged to the outside along the wall surface of the heating chamber 15, thereby cooling the heating chamber 15 and the hot air generation chamber 24.

  In such cooling control of the heating chamber 15, the control unit 40 changes the rotational speed of the hot air fan 61 according to the detected temperature Tr of the temperature sensor 23. Specifically, when the temperature in the heating chamber 15 detected by the temperature sensor 23 is equal to or higher than a predetermined temperature (for example, 200 ° C.), the hot air fan 61 is rotated at a low speed (for example, 1600 rpm) and is lower than the predetermined temperature. The hot air fan 61 is rotated at a high speed (for example, 2000 rpm).

  In addition, during the execution of the cooling control of the heating chamber 15, the control unit 40 notifies the user that the cooling control is being executed by blinking the interior lamp 26. In addition, in order to notify the user that the cooling control is being executed, instead of the blinking of the interior lamp 26 as described above, or in addition to the blinking of the interior lamp 26, for example, “under cooling”, etc. A message indicating that the cooling control is being executed may be displayed on the display unit 20.

  And if cooling control of the heating chamber 15 is performed in step S3, it will progress to step S5.

  In step S5, it is determined whether or not the door sensor 11 detects the closing of the door 16 during execution of the cooling control of the heating chamber 15. If the closing of the door 16 is not detected, the process proceeds to step S6, where the door 16 is closed. If detected, the process proceeds to step S4, where the control unit 40 stops energization of the fan motor 66, stops the rotation of the hot air fan 61, and ends the cooling control of the heating chamber 15.

  In step S6, it is determined whether or not a predetermined operation key 19b such as a cancel key has been operated. If the operation of the predetermined operation key 19b is not detected, the process returns to step S2, and the operation of the predetermined operation key 19b is detected. In this case, the process proceeds to step S4, where the controller 40 stops energization of the fan motor 66, stops the rotation of the hot air fan 61, and ends the cooling control of the heating chamber 15.

  Then, when returning from step S6 to step S2, the control unit 40 again determines whether or not the detected temperature Tr of the temperature sensor 23 is equal to or higher than the operating temperature Th, and the detected temperature Tr of the temperature sensor 23 is equal to or higher than the operating temperature Th. If there is, the process proceeds to step S3, and if the detected temperature Tr of the temperature sensor 23 is lower than the operating temperature Th, the process proceeds to step S4, where the control unit 40 stops energization of the fan motor 66 and stops the rotation of the hot air fan 61. The cooling control of the heating chamber 15 is finished.

  That is, when returning from step S6 to step S2, it is determined whether or not the detected temperature Tr of the temperature sensor 23 during the execution of the cooling control is equal to or higher than the operating temperature Th, and if the detected temperature Tr of the temperature sensor 23 is equal to or higher than the operating temperature Th. In step S3, the cooling control of the heating chamber 15 is continued. Thereafter, step S5, step S6, step S2, and step S3 are sequentially repeated, so that the door sensor 11 detects the closing of the door 16, the predetermined operation key 19b is operated, or the detected temperature Tr of the temperature sensor 23 is set. The cooling control of the heating chamber 15 is continued until any of the operating temperature Th is reached.

  As described above, in the heating cooker 10 according to the present embodiment, when the standby time Tw elapses after the heating cooking control by the hot air circulation mechanism 60 ends, the hot air fan 61 automatically rotates, and thus the heating cooking control ends. There is no need for the user to perform key operations every time later, and there is no problem that quick cooling is not performed due to neglect of key operations, which is convenient.

  Further, since the cooling control is not performed when the temperature of the heating chamber 15 is low, the hot air fan 61 is not unnecessarily rotated and wasteful power consumption can be suppressed.

  Further, when the temperature of the heating chamber 15 is equal to or higher than the predetermined temperature and the inside of the heating chamber 15 is at a high temperature, the high-temperature hot air in the heating chamber 15 is heated by setting the rotation speed of the hot air fan 61 to be high and performing the cooling control. Although the user may be burned out from the opening 15d of the chamber 15 vigorously, in this embodiment, the temperature in the heating chamber 15 is lower than that in the case where the temperature in the heating chamber 15 is low. If it is high, the number of revolutions of the hot air fan 61 is changed according to the temperature in the heating chamber 15 so that the number of revolutions of the hot air fan 61 during cooling control is lowered. Therefore, it is possible to provide a heating cooker 10 that is difficult to perform and highly safe.

  In the present embodiment, when the operation key 19b is operated during the execution of the cooling control or when the door 16 is closed, the cooling control is finished. Therefore, the cooling control can be finished at a desired timing, and the usability is improved. Good.

  Furthermore, in the heating cooker 10 of this embodiment, since the interior lamp 26 blinks during the execution of the cooling control, it is possible that hot air may be discharged from the opening 15d of the heating chamber 15 with a simple configuration. Users can be alerted and alerted. In particular, even if the display unit 20 is provided on the door 16 and the display unit 20 is in a position that is difficult for the user to see when the door 16 is opened, the cooling control is executed by blinking the interior lamp 26. Can be displayed.

  In the above-described embodiment, in the cooling control of the heating chamber 15, the rotational speed of the hot air fan 61 is changed according to the temperature Tr detected by the temperature sensor 23. For example, as shown in FIG. The number of revolutions of the hot air fan 61 in accordance with the elapsed time since the start of the cooling control is set such that the number of revolutions of the hot air fan 61 gradually increases as the elapsed time from the start of the cooling control of the heating chamber 15 increases. May be configured to be changed. With this configuration, the number of rotations of the hot air fan 61 can be set low when the heating chamber 15 is at a high temperature, and the number of rotations of the hot air fan 61 can be set high when the heating chamber 15 is cooled to some extent. It is possible to provide a heating cooker 10 that is less likely to cause burns by the hot air discharged from the user 15 and that is highly safe.

  Moreover, in the heating cooker 10 of this embodiment, you may comprise so that it can set before performing heating control about whether cooling control of the heating chamber 15 is performed after heating cooking control is complete | finished.

  Specifically, the setting for not performing the cooling control at the first operation after power-on is stored in the storage unit 42, and the user operates the selection key 19a to execute the cooling control after the end of the next cooking control. If it sets so that the setting content may be memorize | stored in the memory | storage part 42, the control part 40 will perform the cooling control of the heating chamber 15 after the next heating cooking control is complete | finished. Then, the control unit 40 executes the cooling control of the heating chamber 15 every time the cooking control is finished until the user operates the selection key 19a and is set again so as not to execute the cooling control of the heating chamber 15. To do.

  If the user operates the selection key 19a to set the cooling control after the end of the next heating cooking control after the power is turned on and before the first heating cooking control is executed, the power The control part 40 performs cooling control of the heating chamber 15 after completion | finish of the first heating cooking control after injection | throwing-in.

  By configuring the heating cooker 10 in this way, the hot air fan 61 does not rotate after the end of the heating cooking control without the user's intention, and the user mistakes that the heating cooker 10 is out of order. There is nothing.

DESCRIPTION OF SYMBOLS 10 ... Heating cooker 11 ... Door sensor 12 ... Outer box 14 ... Inner box 15 ... Heating chamber 15d ... Opening part 16 ... Door 19 ... Operation part 20 ... Display part 22 ... Machine room 23 ... Temperature sensor 26 ... Interior lamp 40 ... Control unit 42 ... Storage unit 60 ... Hot air circulation mechanism 61 ... Hot air fan 62 ... Hot air heater 67 ... Suction port 68 ... Air outlet

Claims (10)

A heating chamber having an opening on the front surface for accommodating an object to be heated, a door for opening and closing the opening of the heating chamber, a heat source for heating air, and heating the air heated by the heat source A hot air fan that blows air into the chamber, a door sensor that detects the opening of the door, and a control unit that drives and controls the heat source and the hot air fan,
After completion of the heating control of the heat source, when the door sensor detects the opening of the door continuously for a predetermined time from the time when the opening of the door is detected, the control unit drives the hot air fan to cool the door. A heating cooker characterized by executing control. A temperature sensor for detecting the temperature in the heating chamber;
The cooking device according to claim 1, wherein the control unit stops the hot air fan and terminates the cooling control when the temperature detected by the temperature sensor is equal to or lower than a predetermined temperature. A temperature sensor for detecting the temperature in the heating chamber;
The cooking device according to claim 1, wherein the control unit changes the number of rotations of the hot air fan according to a temperature detected by the temperature sensor when the cooling control is executed.   The cooking device according to claim 1, wherein the control unit changes the number of rotations of the hot air fan according to an elapsed time from the time when the cooling control is started. The control unit includes a storage unit,
The cooking device according to claim 1, wherein the storage unit stores a setting that does not execute the cooling control during an initial operation after power-on. A selection key for setting execution of the cooling control;
When execution of the cooling control is set by the selection key, the setting content is stored in the storage unit, and the control unit executes the cooling control after the heating control of the heat source after the next time is finished. The cooking device according to claim 5.   2. The cooking device according to claim 1, wherein when the door sensor detects that the door is closed during the execution of the cooling control, the control unit stops the rotation of the hot air fan.   The cooking device according to claim 1, further comprising an operation key for stopping rotation of the hot air fan when the cooling control is executed.   The cooking device according to claim 1, further comprising a display unit configured to display that the cooling control is being performed when the cooling control is performed. An illumination device for illuminating the heating chamber;
The cooking device according to claim 1, wherein the lighting device blinks when the cooling control is executed.

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