JP2009079796A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker capable of improving heat insulation and improving visibility to the inside of a heating chamber. <P>SOLUTION: This heating cooker comprises the heating chamber 4 receiving a heated target, a plate portion 5a of an opaque door 5 for opening and closing the heating chamber, a heating means for heating the heated target, a camera 39 inside for picking up an image of the heated target in the heating chamber, and a display portion 8 for displaying an image picked up by the camera 39 inside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating cooker having imaging means for imaging the inside of a heating chamber.

  Conventionally, in a heating cooker such as an electronic microwave oven, the door for opening and closing the heating chamber is made of glass, and the inside is visible. Various heating means such as a magnetron and a heater are provided. The inside of the food is heated by the magnetron, the food surface is baked fragrantly by the heater, and cooking is performed to balance the heating condition and the burned condition. In this case, since heat cooking is performed with various heat sources, improvement in heat shielding properties is required for the purpose of improving the efficiency of heat for heating the inside (see Patent Document 1).

In addition, this conventional door glass is one of the factors that make it easier for heat to escape and deteriorates thermal efficiency. It has been proposed to prevent the escape of heat by using such a highly heat-insulating material.
JP 2006-300486 A

However, in the heating cooker of the above-mentioned measure, the glass is not provided on the door so that the inside cannot be visually recognized. Therefore, the user cannot confirm the cooking status of the object to be heated, and thus there is a problem that the usability is poor.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a cooking device that improves heat insulation in the cooking device and has good visibility in the heating chamber.

  In order to achieve the above object, a heating cooker according to the present invention includes a heating chamber that accommodates an object to be heated, a door that opens and closes the heating chamber, and the inside of the heating chamber cannot be visually recognized in a closed state, and heating the object to be heated. And a display means for displaying an image picked up by the image pickup means.

  According to the cooking device of the present invention, even if a door whose interior is not visible is provided, the image of the heating chamber is imaged and the captured information is notified by the display means. it can.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a front view of a state in which the door is closed, FIG. 2 is a longitudinal side view, FIG. 3 is a front view of the state in which the door is opened, and FIG. 4 is a block diagram schematically showing the configuration of the control system of the microwave oven 1 FIG. 5 is an operation diagram of the cooking menu.

The main body of the microwave oven 1 is configured by fixing a rectangular inner box 3 in a rectangular outer box 2 having an open front as shown in FIG. The inside of the inner box 3 is a heating chamber 4.
The front opening of the heating chamber 4 is opened and closed by a door 5 that rotates up and down. Further, the door 5 is formed of a metal plate plate portion 5a which is an opaque material having a double structure, and is configured so that the user cannot visually recognize the inside of the heating chamber 4 when the door is closed.

The front portion of the door located in front of the heating chamber 4 is provided with a handle portion 6 at the top, and a plurality of operation portions 7 and a display portion 8 (corresponding to display means and cooking function display means) at the bottom. An operation panel 9 is provided (see FIG. 1).
The operation unit 7 is for setting a cooking menu, cooking time, cooking chamber temperature (setting temperature), etc. for cooking. The display unit 8 displays the selected cooking menu, cooking time, etc. as heating information. And a cooking function display means for displaying the cooking function, and an imaging display function for displaying imaging information obtained by imaging the inside of the heating chamber 4 described later.
In these cooking menus, “gratin”, “pizza”, and the like can be selected, and cooking methods suitable for each food are stored in the control unit 37 (corresponding to storage means) in advance.

  A machine room 10 located between the outer box 2 and the inner box 3 is formed in the back part of the main body of the microwave oven 1. A magnetron 11, which is a microwave heating means, is formed in the lower part of the machine room 10. In addition, although not shown, a power supply device for the magnetron 11 and a cooling fan device for cooling the magnetron 11 and the power supply device are disposed. The magnetron 11 generates high frequency, and the generated high frequency is supplied into the heating chamber 4 from the excitation port 13 formed at the bottom of the inner box 3 through the waveguide 12 disposed on the lower surface of the inner box 3. It has come to be.

A step portion 14 is formed inside the bottom portion of the inner box 3, and a bottom plate 15 formed of a glass plate or a ceramic plate is placed on the step portion 14. The bottom plate 15 substantially constitutes the bottom surface of the heating chamber 4, and a rotary antenna 16 for reflecting and stirring the high frequency supplied from the excitation port 13 is disposed in a space below the bottom plate 15. ing. In addition, a lower heater 17 (corresponding to a heating means) such as a sheath heater is disposed in a space below the bottom plate 15 so as to surround the rotating antenna 16, and a planar shape is provided above the inner box 3. An upper heater 18 (corresponding to a heating means) such as a heater is disposed. These upper and lower heaters 17 and 18 function as oven cooking heaters which are one of cooking functions.
The lower heater 17 and the upper heater 18 are configured with different rated outputs. The lower heater 17 is set to 1000 W, and the upper heater 18 is set to 1500 W.

On the other hand, a casing 20 of a hot air generator 19 is fixed to the back surface of the inner box 3, and a centrifugal fan 22 driven by a fan motor 21 and a hot air heater 23 (heating means) are installed in the casing 20. Is equivalent).
The hot air heater 23 is configured so that two heaters are provided around the fan 22, and an inner peripheral heater 23 a (heating means) and an outer peripheral heater 23 b (heating) are located at different locations on the inner peripheral side and the outer peripheral side. Means). The two heaters for hot air have different rated outputs. The inner heater 23a is 1300W and the outer heater 23b is 1400W. These inner peripheral heater 23a and outer peripheral heater 23b function as heaters for hot air circulation cooking, which is one of cooking functions.
The rear wall of the inner box 3, which is the rear surface of the heating chamber 4, is formed with an intake port 24 made up of a number of small holes corresponding to the center side of the fan 22, and both the upper and lower sides of the intake port 24. Exhaust ports 25 that are also located in the portion and are similarly formed of a number of small holes are formed.

  In the hot air generator 19, when the fan 22 rotates, the air in the heating chamber 4 is sucked into the casing 20 from the intake port 24, and heated by the hot air heater 23 to be heated from the upper and lower exhaust ports 25 to the heating chamber 4. It is discharged inside. The inside of the heating chamber 4 is heated by such circulation of hot air so that oven cooking is performed. In oven cooking, oven cooking dishes (not shown) can be arranged in two stages in the heating chamber 4, but the same amount of hot air is supplied from the upper and lower vents 25 as described above. By doing so, the food on the oven-cooked dishes placed one above the other can be cooked well together.

  The inner box 3 is made of a metal plate such as an iron plate, and includes a rectangular flange plate 26, an upper surface plate 27, a rear surface plate 28, a left side plate 29, a right side plate 30, and a bottom surface plate 31 on the front side. Among them, the upper plate 27 and the rear plate 28 are formed by bending a single plate material into an approximately L shape.

  And these plates 26-31 are mutually joined by welding etc., and the flange plate 26 of the front part is joined to the outer box 2 by welding etc., and has a strong heat insulation, so that the heat | fever in a warehouse does not spread | diffuse. There is heat insulation.

Further, of the upper ridge corners of the inner box 3, the ridge corner on the upper rear side, that is, the boundary between the upper plate 27 and the rear plate 28 formed from a single plate is an inclined surface that descends toward the rear side. 32. Further, an imaging window (not shown) is formed at the center of the inclined surface 32 in the lateral (left / right) direction, and an in-compartment camera 39 that images the inside of the heating chamber as desired is disposed in the window. . An infrared sensor (temperature detection means) 33 (not shown) is arranged next to the sensor.
And the door located in front of the inner box 3 comprised by these as mentioned above is also comprised by the board parts 5a made from metal plates, such as an iron plate, and has the heat insulation property of the same degree. The heat in the cabinet is shielded.

Here, the configuration of the control system in the microwave oven 1 will be described with reference to FIG.
The control unit 37 is composed of a microcomputer, and is inputted with a sensor signal output from the infrared sensor 33 or the internal temperature sensor 38 (temperature detection means), and detects whether the door 5 is opened or closed. The signal from is input. Further, an in-compartment camera 39 is connected, and an image in the heating chamber 4 is captured by the in-compartment camera 39, and the captured information is displayed on the display unit 8.

  And the control part 37 is comprised so that the main power switch 56 may be turned ON by turning ON a main power supply with the operation part 7, and power may be supplied to the control part 37. The display of the display unit 8 is controlled, and the drive of the magnetron 11 and the heaters 17, 18, 23a, and 23b is executed and controlled based on a plurality of cooking menu programs stored in an internal memory. .

Similarly, the in-compartment camera 39, which is an image pickup means, is energized at the same time as the main power switch 56 is turned on to start image capturing in the interior, and the captured image is displayed on the display unit 8. .
Therefore, the user can recognize the image in the heating chamber 4 by notifying the display unit 8 at the same time as the main power switch 56 is turned on. Can do.

Here, a function as a cooking function display means on the display unit 8, an operation method based on the function, and an imaging display function will be described.
The display unit 8 is configured to display a cooking menu of a cooking program stored in advance by the control unit, and cooking is started by selecting and executing the cooking menu displayed on the display unit 8. To do.

As shown in FIG. 1, the display unit 8 is divided into an imaging display function of an image of the imaged heating chamber 4 and a cooking function display unit (corresponding to cooking function display means) displayed beside the imaging function. Displayed.
The imaging display function is a portion drawn with a solid line in a circular shape on the left side of the display unit 8, and this is a circular object to be heated placed in a box drawn with a broken line is reduced as an image. Is displayed.

  And the cooking function display part is displayed on the right side of the video as the imaging display function, among which “oven” corresponds to the cooking menu name, and “12 minutes 28 seconds” is the cooking menu. The heating execution time of “130 ° C.” is configured so that the internal temperature is displayed. Based on the operation of the operation unit 7, the cooking menu can be changed, the heating time can be changed, and the internal temperature can be changed. It has become.

  Also, for example, in the lower layers of oven cooking, there are “gratin cooking”, “shoe cooking”, “cookie cooking”, “apple pie cooking”, “hamburg cooking”, “pizza cooking”, etc. that can be automatically cooked. These cooking menus are set so that the heating conditions are different, and heating means (magnetron 11, lower heater 17, upper heater 18, hot air heater 23, inner peripheral heater 23a, outer peripheral heater for execution are executed. 23b is equivalent) or the use time of the heating means is set differently.

Here, the operation of the cooking menu will be described with an example of “gratin cooking”.
FIG. 5 is a timing chart showing the internal temperature change when the “gratin” cooking menu is selected.
First, when a gratin is placed in the heating chamber 4 and “gratin” is displayed on the display unit 8, the display unit 8 displays “gratin cooking” as the name of the cooking menu and “20” as the cooking time. "300 minutes" is displayed as the minute and the internal temperature.

When the start button is pressed in this state, the “gratin cooking menu” stored in the control unit 37 is started.
When the user starts cooking, as shown in FIG. 5, the control unit 37 selects the inner peripheral heater 23 b on the back surface from among the plurality of heating means from the start of heating cooking, and supplies power from the commercial power source 35. Supply.
When the internal temperature reaches the cooking set temperature (300 degrees C), the inner peripheral heater 23a (1300W) connected to the commercial power source 35 is intermittently maintained to maintain the set temperature.
Then, 12 minutes after cooking is started (8 minutes before cooking is finished), the heating is performed by switching to the upper heater 18 (1500 W). And cooking is complete | finished after heating above preset temperature only for predetermined time (8 minutes).
When cooking a gratin etc., it is preferable to finish so that the surface part of a to-be-heated material may be slightly burnt. Therefore, if it controls like this gratin cooking, a heating output can be temporarily raised immediately before completion | finish of cooking, and the surface part of foodstuffs can be burnt.

And the image | video image | photographed with the storage camera 39 during these cooking processes continues displaying on the display part 8. FIG. During this process, the image of the surface of the gratin being heated steadily, or after switching to the upper heater 18, the appearance of scorching is displayed.
As described above, the cooked product in the cooking process is displayed as an image on the display unit 8, so that the user can check the display unit 8 even if the user cannot visually see the inside of the interior from the door. Therefore, for example, when it is recognized that the burnt is just right in gratin cooking, the gratin cooking can be stopped halfway and a gratin with good adjustment can be taken out.

(Second embodiment)
Next, 2nd Embodiment of the heating cooker which concerns on this invention is described with reference to FIG.
The same parts as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different points will be described below.
FIG. 6 is a front view of FIG. 1 corresponding to the state in which the door is closed.
That is, the difference from the first embodiment is that the door has an internal visual recognition part that allows the inside of the heating chamber to be visually recognized.

The door 5 is formed of a metal plate 5a made of an opaque material, and is configured so that the user cannot see the inside of the heating chamber 4 when the door is closed. A window portion 5b (corresponding to the internal visual recognition portion) that can visually recognize the inside is installed in the central portion of the door.
The window portion 5b is located at a different location from the display portion 8, and is configured by inserting transparent glass into an opening hole that communicates with the inside of the heating chamber 4 in the center of the plate portion 5a. The inside of the heating chamber 4 can be visually recognized by visually recognizing from the front of the door 5. The window 5b is provided with a fine metal mesh so that microwaves do not leak.

By comprising in this way, the user can confirm an inside with the captured image in the store | warehouse | chamber notified by the display part 8, and visibility improves.
Further, since the display unit 8 and the internal camera 39 are driven after the main power switch 56 is turned on, according to this configuration, the inside of the window unit 5b can be visually recognized even when the main power source is not turned on. Convenient for users.

(Third embodiment)
Next, a third embodiment of the heating cooker according to the present invention will be described with reference to FIG.
The same parts as those of the second embodiment are denoted by the same reference numerals, description thereof is omitted, and different points will be described below.
FIG. 7 is a front view of the state where the door is closed, corresponding to FIG.
That is, the difference from the second embodiment is that the internal visual recognition portion that allows the inside of the heating chamber to be visually recognized on the door is constituted by a wide-angle lens instead of glass.

That is, as shown in FIG. 7, a window portion 5 b (corresponding to an internal visual recognition portion) that can visually recognize the inside is installed in the center of the plate portion 5 a of the metal plate, and this window portion 5 b It is constituted by a so-called wide-angle type optical lens 5c (corresponding to a wide-angle lens) so that it can be enlarged and visually recognized.
The wide-angle lens 5c is referred to as a standard lens, which is a lens that can shoot almost the same range as that seen by the human eye. It is a general term for lenses that can capture a wider range of viewing angles, that is, a wider range of viewing angles than is seen with the eyes.

That is, by providing the wide-angle lens 5c, the window portion 5b is provided in a very small area with respect to the door 5 for thermal insulation protection, but can be viewed over a wide range in the heating chamber 4. .
For example, when the wide-angle lens 5c is not used, there is only a field of view that allows a part of the cooked food (contour line of the object to be heated) to be visually recognized as indicated by a solid line in the window 5b of FIG. When the wide-angle lens 5c is used, the entire object to be heated can be visually recognized as shown in FIG. 8, and the user can easily visually recognize the inside of the heating chamber 4.

  The wide-angle lens 5c has a scale 5d as shown in FIG. The scale 5d is provided so that the user can easily recognize the size of the object to be heated. For example, when cooking a cream puffed dough, the dough expands and exhibits a shape different from the size before heating. In such a case, there is a great merit that cooking can be finished by determining an appropriate size by measuring the size of the shoe dough with the scale 5d.

Further, the scale 5d has scales written in four directions from the center, but the width between the scales is changed as it spreads to the outer periphery. That is, the scale width is reduced as it spreads to the outer periphery.
This is because, when the wide-angle lens 5c is used, the visual field is enlarged and can be visually recognized. However, the visually recognized object is enlarged and visually recognized at the center of the wide-angle lens 5c, and the visually recognized object is visually recognized as being smaller from the center. It is because it has. Therefore, the dimension of the actual visually recognized object can be accurately measured by reducing the scale width as it spreads to the outer periphery.

(Fourth embodiment)
Next, a fourth embodiment of the heating cooker according to the present invention will be described with reference to FIG.
The same parts as those of the second embodiment are denoted by the same reference numerals, description thereof is omitted, and different points will be described below.
FIG. 9 is a front view corresponding to FIG. 6 in a state where the door is closed.
That is, the difference from the second embodiment is that the door is provided with a plurality of internal visual recognition portions that can visually recognize the inside of the heating chamber.

That is, as shown in FIG. 9, a total of six window portions 5b (corresponding to the internal visual recognition portions) made of transparent glass that can visually recognize the inside are installed on the plate portion 5a of the metal plate. Are arranged side by side three by one. And these window parts 5b are divided and arrange | positioned so that a different position in a heating chamber can be visually recognized, respectively.
Moreover, it is preferable to arrange | position the window part 5b so that the thermal energy in the heating chamber 4 may be arrange | positioned so that it may not spread | diffuse from this glass-made window part.

  By providing in this way, the inside of the heating chamber 4 can be visually recognized so that there is no blind spot. For example, even if the food is placed at the corner of the heating chamber, the food can be recognized.

In the above embodiment, the plate portion 5a of the door 5 is made of metal, but ceramic or the like that is further excellent in heat insulation may be used. Furthermore, the metal plate portion 5a may have a double structure, and a heat insulating material may be inserted therein to enhance the heat insulation.
The present invention is not limited to the embodiments described above and shown in the drawings, but can be modified or expanded.

The front view of the first embodiment of the present invention with the door closed Longitudinal side view of microwave oven Front view with the door open Block diagram schematically showing the configuration of the control system of the microwave oven Operation diagram of the cooking menu. FIG. 1 equivalent diagram of the second embodiment FIG. 6 equivalent diagram of the third embodiment View of wide-angle lens FIG. 6 equivalent diagram of the fourth embodiment

Explanation of symbols

  In the drawings, 1 is a microwave oven, 2 is an outer box, 3 is an inner box, 4 is a heating chamber, 5 is a door, 5a is a plate portion, 5b is a window portion (viewing display portion), 5c is a wide-angle lens, and 6 is a handle. Part, 7 an operation part, 8 a display part (display means), 9 an operation panel, 10 a machine room, 11 a magnetron (heating means), 12 a waveguide, 13 an excitation port, 14 a step part, 15 is a bottom plate, 16 is a rotating antenna, 17 is a lower heater (heating means), 18 is an upper heater (heating means), 19 is a hot air generator, 20 is a casing, 21 is a fan motor, 22 is a fan, and 23 is for hot air Heater (heating means), 23a is an inner peripheral heater (heating means), 23b is an outer peripheral heater (heating means), 24 is an inlet, 25 is an air outlet, 26 is a flange plate, 27 is a top plate, 28 is a rear plate, 29 is a left side plate, 30 is a right side plate, 31 is a bottom plate, 32 is an inclined surface, and 33 is red. Line sensor (temperature detection means), 37 is a control unit (storage means, control means), 38 is an internal temperature sensor (temperature detection means), 39 is an internal camera (imaging means), 56 is a main power switch, 90 is The door opening / closing detection means is shown.

Claims (8)

A heating chamber for storing an object to be heated;
Opening and closing this heating chamber, the door that can not be visually recognized in the closed state,
Heating means for heating an object to be heated;
Imaging means for imaging an object to be heated in the heating chamber;
A heating cooker comprising display means for displaying an image picked up by the image pickup means.   The cooking device according to claim 1, wherein the display means is provided in front of the heating chamber. It further includes an internal visual recognition part that can visually recognize the heating chamber,
2. The cooking device according to claim 1, further comprising display means for displaying an image picked up at a position different from the internal visual recognition portion.   The cooking device according to claim 3, wherein the internal visual recognition part is configured by a wide-angle lens having a wide viewing angle.   The cooking device according to claim 4, wherein a scale is provided in the internal visual recognition part. There are multiple internal viewing parts,
The cooking device according to any one of claims 3 to 5, wherein the plurality of internal visual recognition units are provided at positions where different positions in the heating chamber can be visually recognized.   The cooking device according to any one of claims 1 to 6, further comprising cooking function display means for displaying a cooking function of cooking.   The cooking device according to any one of claims 1 to 7, wherein the door has a heat insulating property comparable to a wall surface of the heating chamber.

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