JPH0914673A - Heating/cooking apparatus - Google Patents

Abstract

PURPOSE: To facilitate visual confirmation of information displayed on a display device. CONSTITUTION: The present heating/cooking apparatus includes a heating chamber, a magnetron for heating an article contained in the heating chamber, and a door 1 for opening and closing a front opening in the heating chamber, further including a NCAP liquid crystal display device 8 provided on the front surface of the door 1. A heat insulating member 11 is disposed on the rear side of the NCAOP liquid crystal display device 8 in the door 1. With the construction, the size of the NCAP liquid crystal display device 8 can be increased so that the size of display information such as characters and figures, etc., displayed on the NCAP liquid crystal display device 8 is increased for easy visual observation. Further, a user looks the NCAP liquid crystal display device 8 from the front of the same so that visual observation is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker having an improved display device for displaying information such as characters and figures related to cooking.

[0002]

2. Description of the Related Art In a cooking device such as a microwave oven or an electric oven, a display device is generally constituted by a fluorescent display tube or an LED, and information such as characters and figures related to cooking is displayed on the display device. Is configured. And
An operation panel is provided at the right end of the front surface of the main body of the heating cooker, and the display device is arranged on the operation panel together with a plurality of operation switches.

[0003]

In the above-mentioned conventional configuration, the area of the operation panel is relatively small, and
Since it is necessary to provide a plurality of operation switches on such an operation panel, the area for disposing the display device is reduced, and thus the size of the display device must be reduced. Therefore, the information such as characters and figures displayed on the display device becomes small, which makes it difficult to visually recognize the information. Further, since the operation panel, and thus the display device, are arranged at the right end portion of the front surface of the main body, the user looks at the display device obliquely, which is also difficult to visually recognize.

Therefore, an object of the present invention is to provide a heating cooker in which the information displayed on the display device is easily visible to the user.

[0005]

The cooking device according to the present invention comprises:
A heating chamber, heating means for heating the food in the heating chamber, a door for opening and closing a front opening of the heating chamber, and an NCAP liquid crystal display device provided on the front portion of the door. It has characteristics. In the case of this configuration, it is preferable to provide a heat insulating material on the rear side of the NCAP liquid crystal display device inside the door. Also, N inside the door
It is also a good configuration to provide an air chamber for heat shield on the rear side of the CAP liquid crystal display device.

Further, it is preferable that the lower part of the door is provided with an intake port for introducing the outside air into the air chamber, and the upper part of the door is provided with an exhaust port for discharging the air in the air chamber to the outside. Furthermore, the heating means is composed of a magnetron, and a ventilation port for guiding the cooling air blown from a fan device for cooling the magnetron to the air chamber is provided at the lower part of the door, and the air in the air chamber is externally provided at the upper part of the door. It is also possible to adopt a configuration in which an exhaust port for discharging to It is also a preferable configuration to dispose the NCAP liquid crystal display device in the lower half of the front surface of the door.

On the other hand, when the temperature in the heating chamber is high, NC
It is conceivable that the AP liquid crystal display device displays a message stating "high temperature caution". Further, when an NCAP liquid crystal display device is provided at or near the handle of the door and the user is urged to open the door, the NCAP
It is also possible to make the liquid crystal display device blink.

Further, an internal light for illuminating the inside of the heating chamber is provided,
Then, it is preferable that the interior lamp is turned on when the NCAP liquid crystal display device is displayed. Also,
The NCAP liquid crystal display device provided on the door may be configured to be transparent while cooking is being performed, and may be configured to display a message indicating “cooking completed” when cooking is completed.

[0009]

The NCAP liquid crystal display device is a display device mainly composed of nematic curvilinear aligned phase liquid crystal, and is more advantageous than a display device composed of a fluorescent display tube or an LED.
The thickness of the display device can be significantly reduced, and the size (area) of the display device can be easily increased. Unlike the normal liquid crystal display device, the NCAP liquid crystal display device does not use a polarizing plate, and thus has a wide viewing angle and significantly high visibility for the user. Therefore, it is possible to relatively easily realize the configuration in which the large NCAP liquid crystal display device is disposed on the front surface of the door that opens and closes the front opening of the heating chamber. The present invention has been made paying attention to this point.

That is, according to the above-mentioned means, since the NCAP liquid crystal display device is provided on the front surface of the door, the restriction on the disposing area of the display device is greatly relaxed, and the size of the display device is increased. Can be increased. For this reason, the information such as characters and figures displayed on the NCAP liquid crystal display device becomes large, and the user can easily recognize the information.
Further, since the NCAP liquid crystal display device is provided on the door, the user can see the display device from the front, and the visibility is improved.

In the case of this structure, the NC inside the door
Providing a heat insulating material on the rear side of the AP liquid crystal display device or providing a heat shield air chamber can prevent the NCAP liquid crystal display device from reaching a high temperature. Further, in the case of a configuration in which an air chamber is provided, when an intake port for guiding outside air to the air chamber is provided at the lower part of the door and an exhaust port for exhausting air in the air chamber is provided at the upper part of the door, The NCAP liquid crystal display device can be effectively cooled by natural convection.

Further, when the heating means is a magnetron, a fan device for cooling the magnetron is provided. Therefore, if a ventilation hole for guiding the cooling air blown from the fan device to the air chamber is provided in the lower part of the door and an exhaust port for discharging the air in the air chamber to the outside is provided in the upper part of the door, the NCAP liquid crystal display The device can be cooled more effectively. If the NCAP liquid crystal display device is arranged in the lower half of the front surface of the door, the lower half of the door does not reach a relatively high temperature.
It is possible to prevent the AP liquid crystal display device from reaching a high temperature.

On the other hand, when the temperature in the heating chamber is high, NC
Displaying a message of “high temperature caution” on the AP liquid crystal display device enhances safety. In addition, an NCAP liquid crystal display device is installed in the door handle or in the vicinity of this handle,
When prompting the user to open the door, the above NC
When the AP liquid crystal display device is configured to blink,
Usability improves. Further, when the NCAP liquid crystal display device is displayed, if the interior lamp for heating the heating chamber is turned on, the display contents of the NCAP liquid crystal display device can be more easily visually recognized.

Further, if the NCAP liquid crystal display device provided on the door is configured to be transparent while cooking is being performed, and is configured to display a message indicating "completion of cooking" at the end of cooking, cooking is performed. The inside is transparent NC
The inside of the heating chamber can be visually recognized through the AP liquid crystal display device, while it can be clearly recognized by the display mode of the NCAP liquid crystal display device when cooking is completed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a microwave oven with an oven grill function will be described below with reference to FIGS. First, the main body of the microwave oven has a rectangular box shape as a whole, and a heating chamber is provided therein. The front opening of this heating chamber is shown in FIG.
The door 1 is opened and closed as shown in FIG. The door 1 is rotatably provided with a left end (right end in FIG. 1) as a fulcrum of rotation.

A machine room is provided at the right end portion (right side portion of the heating chamber) in the main body of the microwave oven, and the magnetron 2 as heating means is provided in the machine chamber.
(See FIG. 2). This magnetron 2
Is configured to range-heat the food contained in the heating chamber by supplying microwaves to the heating chamber. A fan device 3 (see FIG. 2) for cooling the magnetron 2 is provided in the machine chamber, and the fan device 3 is composed of a fan and a fan motor 3a for rotationally driving the fan. A rotary plate is rotatably provided on the inner bottom of the heating chamber, and the rotary plate is configured to be rotationally driven by the RT motor 4 (see FIG. 2).

Further, a heater 5 (see FIG. 2) for heating the oven grill is provided as a heating means on the ceiling, bottom or back of the heating chamber. In this case, the heaters 5 on the ceiling and the bottom are composed of, for example, flat heaters. Further, the heater 5 on the back side is composed of a hot air circulating device for circulating hot air into the heating chamber, for example.

Now, as shown in FIG. 1, a rectangular window portion 7 is formed in the upper half portion of the door frame 6 which constitutes the door 1. The window 7 is provided with a transparent rear glass 7a on its rear surface side and a transparent front glass 7b on its front surface side. Further, the rear glass 7a
A punching metal formed by forming a large number of small holes in a metal plate is disposed on the front side of the as a microwave barrier. A contact plate for preventing microwave leakage having a well-known structure is provided on a portion of the rear surface of the door frame 6 that comes into contact with the opening edge of the heating chamber.

In the lower half of the front surface of the door frame 6, an NCAP liquid crystal display device 8 and a membrane switch 9 are provided.
A panel body 10 configured by stacking (see also FIG. 6) is provided. Further, a heat insulating material 11 is arranged on the rear side of the panel body 10 (that is, the NCAP liquid crystal display device 8) inside the door frame 6. This insulation 11
Has a function of blocking transmission of high heat emitted from the heating chamber side to the panel body 10 and further to the NCAP liquid crystal display device 8. As shown in FIG. 3, a handle 1 for holding a hand when the door 1 is opened and closed is provided on the right end portion of the front surface of the door frame 6.
2 are formed.

Here, the NCA of the panel body 10 is
The P liquid crystal display device 8 will be described with reference to FIGS. 4 and 5. Of these, FIG. 4 is an enlarged cross-sectional view of the NCAP liquid crystal display device 8. As shown in FIG. 4, the NCAP liquid crystal display device 8 includes a paint mask 8a, a UV (ultraviolet) barrier 8b, a common transparent electrode film 8c, a common transparent electrode 8d, and NCAP from the front surface side (upper surface side in FIG. 4). It is composed of a liquid crystal element 8e, a segment transparent electrode 8f, a segment transparent electrode film 8g, and a reflecting portion 8h. Then, the segment transparent electrode film 8g is provided with a lead portion 8i for drawing out a lead wire.

Further, the paint mask 8a is a transparent film on which a display which is visible from the front side is printed on the back side or the front side regardless of whether the NCAP liquid crystal element 8e is ON or OFF. The paint mask 8a is a member constituting the surface portion of the NCAP liquid crystal display device 8, and its material is U.
L flame retardant grade 94-V0 or higher. The UV barrier 8b is a transparent film for protecting the dye, which dyes NCAP liquid crystal in the cell (described later) of the NCAP liquid crystal element 8e black, from ultraviolet rays. The common transparent electrode film 8c is a transparent film in which a common transparent electrode 8d common to all the segments is printed on the NCAP liquid crystal element 8e side as a transparent electrode for activating the NCAP liquid crystal in the cell. The NCAP liquid crystal element 8e will be described later. The film for segment transparent electrode 8g is
As a transparent electrode for activating the CAP liquid crystal, a segment transparent electrode 8f is a transparent film printed on the NCAP liquid crystal element 8e side. The segment transparent electrode 8f is
It is composed of a transparent electrode pattern (segment) having a shape corresponding to each display information consisting of characters or figures. Each display information consisting of characters or figures is printed on the reflecting portion 8h.

Here, the NCAP liquid crystal element 8e will be described in detail with reference to FIG. This FIG. 5 shows the NCAP liquid crystal element 8
It is a schematic diagram which expands and shows e. As shown in FIG.
The CAP liquid crystal element 8e has a flexible rubber layer 8e1.
And a large number of fine cells 8e2 provided in the rubber layer 8e1. In this cell 8e2,
NCAP liquid crystal (nematic curvilinear aligned phase liquid crystal) 8e3
Is enclosed. In this case, since the NCAP liquid crystal 8e3 itself is transparent, it is dyed black in order to realize the light transmission control by the NCAP liquid crystal 8e3. Also, NCA
The molecules of the P liquid crystal 8e3 are elongated and arranged in a spherical cell 8e2 in a state called a nematic curvilinear alignment phase in which they are aligned in a curved state toward the opposite two poles.

When no electric field is applied to the NCAP liquid crystal element 8e, the poles of the cell 8e2 are oriented in random directions, and the light incident from the surface is reflected by being blocked by the dye in the cell 8e2. Almost no light is reflected from the portion 8h (see arrow A in FIG. 5). In this case, in front of the NCAP liquid crystal display device 8 (upper side in FIG. 5)
Therefore, the display information printed on the reflecting portion 8h cannot be visually recognized.

On the other hand, when a voltage, for example, an AC voltage is applied between the common transparent electrode 8d and the segment transparent electrode 8f, the NCAP liquid crystal element corresponding to the segment (transparent electrode pattern) located between the electrodes 8d and 8f. 8e
An electric field is applied to the part. In such a state, the NCAP liquid crystal 8e3 in the cell 8e2 is aligned in the direction of the electric field, so that the light incident from the surface is reflected by the reflecting portion 8h and emitted from the surface (see arrow B in FIG. 5). . In this case, the display information printed on the reflecting portion 8h can be visually recognized from the front of the NCAP liquid crystal display device 8.

Further, since the NCAP liquid crystal display device 8 mainly composed of the NCAP liquid crystal element 8e has flexibility, when the NCAP liquid crystal display device 8 and the thin film membrane switch 9 are superposed on each other, the NCAP liquid crystal display device is superposed. 8
The switch can be operated by pressing each switch of the membrane switch 9 from the front side. Hereinafter, this configuration will be specifically described with reference to FIG.

FIG. 6 is a sectional view of a panel body 10 in which an NCAP liquid crystal display device 8 and a membrane switch 9 are laminated. As shown in FIG. 6, the membrane switch 9 is
Membrane electrodes 9c and short pads 9d are provided on the respective opposing surfaces of the opposing films 9a and 9b, and an insulating sheet 9e is interposed between the films 9a and 9b. In this case, film 9
When a is not pressed from the front surface side, the membrane electrode 9c and the short pad 9d are separated from each other and are in an off state. Then, when the film 9a is pressed from the front surface side, the membrane electrode 9c and the short pad 9d come into contact with each other to be turned on.

Further, the membrane switch 9 is provided with a plurality of key switches composed of the membrane electrode 9c and the short pad 9d, and these key switches are various operation switches (cooking course selection switch and start switch) of the oven grill range. Etc.). The NCAP liquid crystal display device 8 side is provided with a key display section for identifying and displaying each key switch corresponding to the plurality of key switches.

FIG. 3 shows an NCAP liquid crystal display device 8
It is a front view of the door 1 which shows an example of the display mode of (and the membrane switch 9). As shown in this FIG.
The P liquid crystal display device 8 includes a "time display unit" for displaying time and time, a "range" for displaying a range key for setting microwave cooking, and a "heater" for displaying a heater key for setting heater cooking. Is provided. In this case, for example, when the "range" is pressed, microwave cooking is set, and the color of the "range" is changed, so that microwave cooking is set. Similarly, when the "heater" is pressed, the heater cooking is set, and the color of the "heater" portion is changed to clearly indicate that the heater cooking is set. The NCAP liquid crystal display device 8 (and the membrane switch 9) is provided with various display units and key switches in addition to the display units and key switches shown in FIG.

On the other hand, FIG. 2 shows the electrical construction of the above-mentioned oven grill range in combination of functional blocks. In FIG. 2, the control device 13 is composed of a microcomputer and the like, and has a function of controlling the overall heating and cooking operation of the oven grill range. The control device 13 is configured to control the display of the NCAP liquid crystal display device 8 by applying a voltage between the transparent electrodes 8d and 8f of the NCAP liquid crystal display device 8 through the drive circuit 14. The control device 13 is configured to receive various switch signals from the membrane switch 9 when each key switch of the membrane switch 9 is operated.

Further, the control device 13 drives and controls the magnetron 2 via a drive circuit 15 composed of, for example, an inverter circuit, and illuminates the RT motor 4, fan motor 3a, heater 5 and heating chamber via a drive circuit 16. It is configured to drive and control the interior lamps 17 that operate. Further, the control device 13 is configured to receive each detection signal from various sensors 18. The various sensors 18 are a gas sensor that detects a gas such as water vapor generated from the food, a weight sensor that detects the weight of the food, or a temperature sensor that detects the temperature in the heating chamber. Further, the control device 13 is configured to receive drive power from the power supply circuit 19.

According to the present embodiment having such a configuration, the NCAP liquid crystal display device 8 is provided on the front surface of the door 1, so that the restriction on the installation area of the display device can be greatly relaxed. Therefore, it is possible to freely increase the size of the NCAP liquid crystal display device. For this reason, individual display information such as characters and figures displayed on the NCAP liquid crystal display device 8 can be increased, so that the display information can be easily viewed. Since the NCAP liquid crystal display device 8 is provided on the door 1, the user can see the display device 8 from the front. Therefore, the visibility of the display device 8 is higher than that of the conventional configuration in which the display device is provided on the operation panel.

Here, the NCAP liquid crystal display device 8 is a display device mainly composed of nematic curvilinear aligned phase liquid crystal, and has a thickness larger than that of a conventional display device composed of a fluorescent display tube or an LED. The size can be significantly reduced, and the size (area) of the display device
Can be easily enlarged. And NCA
The P liquid crystal display device 8 is different from an ordinary liquid crystal display device.
Since no polarizing plate is used, the viewing angle is widened and the visibility of the user is significantly improved. Therefore, it is possible to easily realize a configuration in which the large NCAP liquid crystal display device 8 is arranged on the front surface of the door 1 that opens and closes the front opening of the heating chamber.

Further, in the above-mentioned embodiment, since the heat insulating material 11 is arranged on the rear side of the NCAP liquid crystal display device 8 inside the door 1, the NCAP is heated by the heat from the heating chamber.
It is possible to prevent the liquid crystal display device 8 from becoming hot. As a result, the life of the NCAP liquid crystal display device 8 which is relatively weak against heat can be extended. Further, in the above embodiment, the door 1
The NCAP liquid crystal display device 8 is arranged in the lower half of the front surface of the. In the case of this configuration, the lower half portion of the door 1 is a portion that does not reach a relatively high temperature, so that the NCAP liquid crystal display device 8 can be further prevented from reaching a high temperature.

In the above embodiment, the control device 13
Is configured to turn on the inside lamp 17 for heating the heating chamber when the NCAP liquid crystal display device 8 is driven for display. According to this configuration, the light from the interior light 17 causes N
Since the CAP liquid crystal display device 8 is illuminated, it is easy to visually recognize the display content of the NCAP liquid crystal display device 8 when the room is dark.

In the above embodiment, the lower half of the door 1 has N
Although the CAP liquid crystal display device 8 is arranged, the window 7
When it is not necessary to provide the NCAP liquid crystal display device 8, the NCAP liquid crystal display device 8 may be provided over almost the entire front surface of the door 1. In this case, it is preferable to dispose the heat insulating material so as to fill almost the entire area inside the door 1. According to this configuration, the NCAP liquid crystal display device 8 can be further increased in size, so that the visibility of the display content of the NCAP liquid crystal display device 8 is further enhanced.

FIGS. 7 and 8 show a second embodiment of the present invention, and the difference from the first embodiment will be described. The same parts as those of the first embodiment are denoted by the same reference numerals. In the second embodiment, as shown in FIGS. 7 and 8, instead of the structure in which the heat insulating material 11 is provided inside the door 1,
An air chamber 20 for heat shielding is provided on the rear side of the NCAP liquid crystal display device 8 inside the door 1. Specifically, rectangular opening portions 21 and 22 are formed in the front surface portion and the rear surface portion of the door frame 6 so as to open in substantially the entire front surface portion and the rear surface portion, respectively.

A transparent front glass 23 and a transparent rear glass 24 are attached to the openings 21 and 22, respectively. As a result, the heat shield air chamber 20 is formed inside the door frame 6. A punching metal (not shown) is provided on the front side (inner side) of the rear glass. Further, a contact plate (not shown) for preventing microwave leakage is provided on the peripheral portion of the opening in the rear surface of the door frame 6.

The front portion of the door frame 6, that is,
A panel body 10 formed by laminating the NCAP liquid crystal display device 8 and the membrane switch 9 is arranged on the lower half portion of the front surface of the front glass 23. The configuration of the second embodiment other than the above is the same as the configuration of the first embodiment. Therefore, also in the second embodiment, it is possible to obtain substantially the same effect as that of the first embodiment.
Particularly, in the second embodiment, the air chamber 20 is provided inside the door frame 6, and the air chamber 20 is configured to shield the heat from the heating chamber from being transmitted to the NCAP liquid crystal display device 8 side. The number of parts and the number of assembling steps can be reduced as much as the heat insulating material 11 can be eliminated.

FIGS. 9 and 10 show a third embodiment of the present invention, and the difference from the second embodiment will be described. The same parts as those in the second embodiment are designated by the same reference numerals. In the third embodiment, as shown in FIGS. 9 and 10, for example, four intake ports 2 are provided on the lower surface of the door frame 6.
5 is provided, and the outside air is guided into the air chamber 20 through the intake port 25. Further, for example, four exhaust ports 26 are provided on the upper surface of the door frame 6, and the exhaust ports 2
The air in the air chamber 20 is discharged to the outside through the unit 6. In the case of this configuration, outside air enters the air chamber 20 through the lower intake port 25, and the air warmed in the air chamber 20 is discharged to the outside through the upper exhaust port 26 by natural convection. As a result, the heat from the heating chamber is smoothly radiated to the outside by the natural convection of the air. The configuration of the third embodiment other than the above is the same as the configuration of the second embodiment.

Therefore, also in the third embodiment, it is possible to obtain substantially the same operational effects as in the second embodiment. Particularly, in the third embodiment, the intake port 25 is provided in the lower part of the door frame 6, and the exhaust port 2 is provided in the upper part of the door frame 6.
Since 6 is provided, NC is caused by natural convection of air.
The AP liquid crystal display device 8 can be cooled more effectively.

FIG. 11 shows a fourth embodiment of the present invention, and the difference from the third embodiment will be described. still,
The same parts as those in the third embodiment are designated by the same reference numerals. In the fourth embodiment, as shown in FIG. 11, the inside of the air chamber 20 is replaced by the cooling air from the fan unit 3 for cooling the magnetron 2, instead of the structure of cooling the inside of the air chamber 20 by natural convection of air. It is configured for forced cooling. Specifically, at the lower right end of the rear surface of the door frame 6, for example, 1
In addition to providing the individual vent holes 27, for example, four exhaust ports 26 are provided on the upper surface of the door frame 6. In this case, a portion of the front surface of the main body 28 of the microwave oven with which the vent hole 27 of the door frame 6 abuts is the lower left end portion of the front wall of the machine room 30 provided on the right side of the heating chamber 29, An opening of substantially the same size as the vent hole 27 is also formed in the lower left portion of the front wall of the machine room 30.

Then, the cooling air generated by the fan device 3 disposed in the machine room 30 passes through the opening of the front wall of the machine room 30 and the vent hole 27 of the door frame 6 to the inside of the air room 20. After being blown into the air chamber 20, the air is passed through the air chamber 20 and then discharged to the outside through the exhaust port 26 in the upper portion of the door frame 6. In this case, the heating chamber 29
The heat from is forcedly radiated to the outside by the cooling air generated by the fan device 3. The configuration of the fourth embodiment other than the above is the same as the configuration of the third embodiment.

Therefore, also in the fourth embodiment, it is possible to obtain substantially the same operational effects as in the third embodiment. Particularly, in the fourth embodiment, the fan unit 3 for cooling the magnetron is configured to forcibly cool the inside of the air chamber 20 of the door frame 6 to cool the NCAP liquid crystal display device 8. Therefore, the NCAP liquid crystal display device 8 Can be more reliably prevented from becoming high temperature.

FIG. 12 shows a fifth embodiment of the present invention, and the difference from the second embodiment will be described. still,
The same parts as those in the second embodiment are designated by the same reference numerals. In the fifth embodiment, as shown in FIG. 12, the NCAP liquid crystal display device 31 is provided on the right peripheral portion near the handle 12 of the door 1. When the control device 13 prompts the user to open the door 1,
For example, at the end of cooking, the NCAP liquid crystal display device 30
The entire display is configured to blink. Further, at the front part of the door 1, that is, at the upper right end part of the front glass 23, a message "Caution of high temperature" can be displayed.
A CAP liquid crystal display device 32 is provided. in this case,
When the control device 13 detects that the temperature inside the heating chamber is high, the control device 13 indicates to the NCAP liquid crystal display device 32 that “high temperature is warned”.
Is displayed.
The configuration of the fifth embodiment other than that described above is the same as the configuration of the second embodiment.

Therefore, also in the fifth embodiment, it is possible to obtain substantially the same operational effect as in the second embodiment. Particularly, in the fifth embodiment, when the door 1 needs to be opened, the NCAP liquid crystal display device 31 near the handle 12 blinks, so that the user has to open the door 1. It can be clearly recognized and improves usability. Further, in the fifth embodiment, when the temperature inside the heating chamber is high, N
Since the message “high temperature caution” is displayed on the CAP liquid crystal display device 32, safety is enhanced.

In the fifth embodiment, the NCAP liquid crystal display device 31 is arranged near the handle 12, but instead of this, the NCAP liquid crystal display device is arranged on the surface of the handle 12 itself. The same operational effect can be obtained in this configuration as well.

13 to 15 show a sixth embodiment of the present invention, and the difference from the first embodiment will be described. The same parts as those of the first embodiment are denoted by the same reference numerals. In the sixth embodiment, as shown in FIGS. 13 and 14, an NCAP liquid crystal display device 33 is provided in the lower half of the front surface of the door 1 instead of the NCAP liquid crystal display device 8. . This NCAP liquid crystal display device 33
Is configured to be able to display the message “Cooking complete”. Then, the controller 13 controls the NCAP liquid crystal display device 33 as shown in FIG.
The message "cooking completed" is not displayed on the display, and the message "cooking completed" is displayed on the NCAP liquid crystal display device 33 as shown in FIG. 14 when cooking is completed.

Here, a specific structure of the NCAP liquid crystal display device 33 will be described with reference to FIG. This figure 1
As shown in FIG. 5, the NCAP liquid crystal display device 33 includes a film 33c for a common transparent electrode and a film-shaped NCA.
P liquid crystal element 33e and film for segment transparent electrode 3
3g is laminated. Here, the common transparent electrode 33d is formed on the lower surface of the common transparent electrode film 33c, that is, the side surface contacting the NCAP liquid crystal element 33e.
Is printed. Then, on the upper surface of the segment transparent electrode film 33g, that is, on the side surface contacting the NCAP liquid crystal element 33e, the segment transparent electrode 33f having a shape corresponding to the character "Cooking completed" (in this case, two characters of "Cooking") is formed. (Only shown) is printed. Further, a paint mask and a UV barrier (not shown) are laminated on the upper surface side of the common transparent electrode film 33c. Further, a reflecting portion (not shown) is laminated on the lower surface of the segment transparent electrode film 33g.

In the case of the above structure, when the voltage is not applied between the common transparent electrode 33d and the segment transparent electrode 33f, the entire NCAP liquid crystal element 33e is opaque, and the word "cooking completed" is not displayed. (Fig. 13
reference). On the other hand, when a voltage is applied between the common transparent electrode 33d and the segment transparent electrode 33f, the portion corresponding to the shape of the segment transparent electrode 33f in the NCAP liquid crystal element 33e, that is, the character part of "completion of cooking" becomes transparent. Therefore, the word "cooking completed" is displayed (see FIG. 14).

In the case of the sixth embodiment, various other display parts of the microwave oven are connected to the NCAP liquid crystal display device 33.
It may be configured to be arranged at. Further, various operation switches of the microwave oven may be configured by the membrane switch as in the first embodiment, and the membrane switch may be disposed on the lower surface of the NCAP liquid crystal display device 33. preferable. The configuration of the sixth embodiment other than the above is the same as the configuration of the first embodiment. Therefore, also in the sixth embodiment, it is possible to obtain substantially the same operational effects as in the first embodiment.

In the sixth embodiment, NCAP is used.
The liquid crystal display device 33 is configured to be able to display only a message "cooking completed", and various other display units and various operation switches are arranged on the operation panel provided in the front part of the machine room. May be. Further, in the second to fourth embodiments, instead of the NCAP liquid crystal display device 8, it is possible to display only the above-mentioned “cooking completed” message.
The CAP liquid crystal display device 33 may be arranged. Then, in the case of each of such configurations, if the NCAP liquid crystal display device 33 is configured so as not to include the reflection portion, the NC
When the message "cooking completed" is displayed on the AP liquid crystal display device 33, the inside of the heating chamber can be visually recognized through the character part "cooking completed" and the message "cooking completed" is displayed from the interior lamp 17 It comes to emit light.

16 to 18 show the seventh embodiment of the present invention, and the difference from the second embodiment will be described. The same parts as those in the second embodiment are designated by the same reference numerals. In the seventh embodiment, as shown in FIGS. 16 and 17, the NCAP liquid crystal having substantially the same size as the front glass 23 is provided over almost the entire front surface of the door 1, that is, over the entire front glass 23. A display device 34 is provided. This NCAP liquid crystal display device 34, as shown in FIG.
A first common transparent electrode film 34c, a film-shaped NCAP liquid crystal element 34e formed in a shape corresponding to the character "Cooking completed" (in this case, only two characters "Cooking" are shown), The second common transparent electrode film 34g is laminated. Here, the lower surface of the first common transparent electrode film 34c, that is, N
A first common transparent electrode 34d is printed on the side surface contacting the CAP liquid crystal element 34e. Then, the upper surface of the second common transparent electrode film 34g, that is, NCAP.
A second common transparent electrode 34f is printed on the side surface that abuts the liquid crystal element 34e. Then, a portion between the common transparent electrodes 34d and 34f where the NCAP liquid crystal element 34e does not exist is filled with a transparent insulating material. Further, a transparent mask and a transparent UV barrier (not shown) are laminated on the upper surface side of the first common transparent electrode film 34c.

In the case of the above configuration, when the voltage is applied between the common transparent electrodes 34d and 34f, the portion of the NCAP liquid crystal element 34e is also transparent, so that the entire NCAP liquid crystal display device 34 is transparent, and "cooking is completed". Is not displayed (see FIG. 16). On the other hand, the common transparent electrode 34d
And when no voltage is applied between 34f, NCA
Since only the portion of the P liquid crystal element 34e, that is, the portion corresponding to the character "completion of cooking" becomes opaque, the character "completion of cooking" is displayed on the NCAP liquid crystal display device 34 (see FIG. 17).

Then, the control device 13 controls so that the entire NCAP liquid crystal display device 34 becomes transparent during the cooking process (see FIG. 16), and when the cooking process is completed, the NCAP liquid crystal display device is displayed. It is configured to control to display a message to the effect that "cooking completed" on 34 (see FIG. 17). In the seventh embodiment, various other display units and various operation switches of the microwave oven are arranged on the operation panel provided on the front surface of the machine room. The configuration of the seventh embodiment other than the above is the same as the configuration of the second embodiment.

Therefore, also in the seventh embodiment, it is possible to obtain substantially the same operational effects as in the second embodiment. Particularly, in the seventh embodiment, the NC which is entirely transparent during the execution of cooking.
The inside of the heating chamber can be visually recognized through the AP liquid crystal display device 34, while the message is displayed by the NCAP liquid crystal display device 34 when cooking is completed, so that the end of cooking can be clearly recognized.

In the third or fourth embodiment, the NCAP liquid crystal display device 8 may be replaced with the NCAP liquid crystal display device 34 of the seventh embodiment. . Also in the case of such a configuration, it is possible to obtain the same operational effect as that of the seventh embodiment.

[0057]

As is apparent from the above description, the present invention has the structure in which the NCAP liquid crystal display device is provided on the front surface of the door. Therefore, the size of the NCAP liquid crystal display device can be increased, and the NCAP liquid crystal display device can be increased in size. Information such as characters and figures displayed on the liquid crystal display device can be easily visually recognized, and since the user can see the NCAP liquid crystal display device from the front, the visibility is improved.

In the case of the above construction, a heat insulating material may be provided on the rear side of the NCAP liquid crystal display device inside the door,
Providing an air chamber for heat shielding can prevent the NCAP liquid crystal display device from reaching a high temperature. Further, in the case of a configuration in which an air chamber is provided, if an intake port that guides outside air to the air chamber is provided at the bottom of the door, and an exhaust port that discharges the air in the air chamber to the outside is provided at the top of the door, natural convection of air will occur. NC
The AP liquid crystal display device can be cooled effectively.

Furthermore, a ventilation port for guiding the cooling air blown from the fan device for cooling the magnetron to the air chamber is provided at the lower part of the door, and an exhaust port for discharging the air in the air chamber to the outside is provided at the upper part of the door. Thus, the NCAP liquid crystal display device can be cooled more effectively. On the other hand, when the NCAP liquid crystal display device is arranged in the lower half of the front surface of the door, the lower half of the door does not reach a relatively high temperature, so that the NCAP liquid crystal display device can be prevented from reaching a high temperature. .

When the temperature in the heating chamber is high, NC
Displaying a message of “high temperature caution” on the AP liquid crystal display device enhances safety. Furthermore, an NCAP liquid crystal display device is provided on or near the door handle,
When prompting the user to open the door, the above NC
When the AP liquid crystal display device is configured to blink,
Usability improves. Furthermore, when the NCAP liquid crystal display device is displayed, if the interior lamp for heating the heating chamber is turned on, the contents displayed on the NCAP liquid crystal display device can be more easily visually recognized.

If the NCAP liquid crystal display device provided on the door is configured to be transparent during cooking and a message "Cooking complete" is displayed at the end of cooking, the cooking is performed during cooking. The inside of the heating chamber can be visually recognized through the transparent NCAP liquid crystal display device, while when cooking is completed, the fact can be clearly recognized by the display message of the NCAP liquid crystal display device.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door showing a first embodiment of the present invention.

FIG. 2 is a block diagram.

[Figure 3] Front view of the door

FIG. 4 is an enlarged cross-sectional view of an NCAP liquid crystal display device.

FIG. 5 is a schematic diagram of an NCAP liquid crystal display device for explaining the operation.

FIG. 6 is an enlarged sectional view of a panel body.

FIG. 7 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;

FIG. 8 is a vertical sectional side view of the door.

FIG. 9 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 10 is a diagram corresponding to FIG. 8;

FIG. 11 is a perspective view of a door and a microwave oven body showing a fourth embodiment of the present invention.

FIG. 12 is a partial front view of a door showing a fifth embodiment of the present invention.

FIG. 13 is a front view of a door showing a sixth embodiment of the present invention.

FIG. 14 is a front view of the door showing different display states.

FIG. 15 is an exploded perspective view of an NCAP liquid crystal display device.

FIG. 16 is a view corresponding to FIG. 13 showing a seventh embodiment of the present invention.

FIG. 17 is a view equivalent to FIG.

FIG. 18 is a view equivalent to FIG. 15.

[Explanation of symbols]

1 is a door, 2 is a magnetron (heating means), 3 is a fan device, 3a is a fan motor, 6 is a door frame, and 8 is N.
CAP liquid crystal display device, 9 is a membrane switch, 10 is a panel body, 11 is a heat insulating material, 12 is a handle, 13 is a control device, 17 is a room light, 20 is an air chamber, 23 is a front glass,
24 is a rear glass, 25 is an intake port, 26 is an exhaust port, 27
Is a vent, 28 is a main body, 29 is a heating room, 30 is a machine room,
Reference numerals 31, 32, 33 and 34 denote NCAP liquid crystal display devices.

Claims (10)

[Claims] 1. A heating chamber, heating means for heating food in the heating chamber, a door for opening and closing a front opening of the heating chamber, and an NCAP liquid crystal display device provided on the front portion of the door. A cooking device provided. 2. The heating cooker according to claim 1, wherein a heat insulating material is provided on the rear side of the NCAP liquid crystal display device inside the door. 3. The heating cooker according to claim 1, wherein an air chamber for heat shielding is provided on the rear side of the NCAP liquid crystal display device inside the door. 4. An air inlet for guiding outside air to the air chamber is provided at a lower portion of the door, and an air outlet for exhausting air in the air chamber to the outside is provided at an upper portion of the door. Cooking device. 5. The heating means is composed of a magnetron, and a ventilation port for guiding cooling air blown from a fan device for cooling the magnetron to an air chamber is provided at a lower part of the door, and an upper part of the door is provided with an inside of the air chamber. The cooking device according to claim 3, further comprising an exhaust port for discharging air to the outside. 6. An NCA is provided in the lower half of the front surface of the door.
The heating cooker according to any one of claims 1 to 5, further comprising a P liquid crystal display device. 7. The NCAP when the temperature in the heating chamber is high.
The cooking device according to any one of claims 1 to 6, characterized in that a liquid crystal display device displays a message to the effect of "high temperature caution". 8. A door handle or an NC near the handle.
The heating cooker according to claim 1, wherein an AP liquid crystal display device is provided, and when the user is prompted to open the door, the NCAP liquid crystal display device is displayed in a blinking manner. 9. The heating according to claim 1, further comprising: an interior lamp for illuminating the inside of the heating chamber, wherein the interior lamp is turned on when the NCAP liquid crystal display device is displayed. Cooking device. 10. The NCAP liquid crystal display device provided on the door is configured to be transparent while cooking is being performed, and is also configured to display a message “Cooking complete” at the end of cooking. The cooking device according to claim 1, 3, 4, or 5.