JP2009180392A - Oven range - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat quantity density (W density) of a heater and to quickly perform toast cooking by efficiently controlling power distribution to glass tube heaters disposed on upper and lower portions of an oven cooking chamber in a state of directly facing the inside of the chamber. <P>SOLUTION: In this oven range comprising a microwave heating means for heating food in the oven cooking chamber 2 and a heater heating means, the heater heating means is constituted by arranging the glass tube heaters 5a, 5b, 5c, 5d at a front side and a back side of the upper and lower portions of the oven cooking chamber 2 in a state of directly facing the inside of the chamber, and electricity is distributed to only the glass tube heaters 5a, 5c of the upper and lower portions at the front side in toast cooking. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a microwave oven capable of toast cooking by a heater heating means.

  Conventionally, a heating means based on an electric heater is added to a heating means using microwaves (high frequency) generated by a magnetron, and the repertoire of the cooking menu is expanded including the combined use of these heating means, or cooking with good food finish Microwave ovens that enable this are provided. Among them, a general example of the heater heating means includes a rod-shaped glass tube heater made of a quartz tube heater in a ceiling portion which is an upper portion of an oven cooking chamber for storing food and cooking, and a bottom portion which is a lower portion. In general, an electric heater different from the glass tube heater such as a flat heater is provided (see, for example, Patent Documents 1 and 2).

  According to the above configuration, the glass tube heater is characterized in that the rise in the internal temperature is fast, and is disposed on the inner surface of the ceiling directly facing the interior as the upper heater. On the other hand, a flat heater is employed as the lower heater as described in Patent Document 2 above. This flat heater is frequently used taking advantage of the advantage that it can be formed into a flat thin plate formed by sandwiching a heating element with a mica plate or an insulating plate. However, not only the heating efficiency as the above glass tube heater is obtained, it is usually provided on the back side of the bottom plate of the oven cooking cabinet, and it is an indirect heating system via the bottom plate to the so-called chamber, so it is easy to clean Although it is advantageous, it has a disadvantage in that the radiant heat from the lower part is small and a rapid rise in the inside temperature is desired.

  Therefore, the heater heating means by combining the glass heater of the upper heater and the flat heater of the lower heater requires 3 minutes or more to perform toast cooking of a piece of bread, for example, a bread cut as a food. The same performance as an oven toaster (3 minutes or less) cannot be obtained.

  Therefore, it is considered that a glass tube heater may be adopted in the lower heater (see, for example, Patent Document 3). However, the bottom glass tube heater disclosed in Patent Document 3 is disposed on the back side of the bottom plate, and is also an indirect heating method as described above, which is not efficient.

In addition, as shown in the above-mentioned Patent Document 2, there are disadvantages in terms of cleanliness, such as arranging two glass tube heaters in the upper part, but even in the lower heater, adopting two glass tube heaters, It is conceivable to improve the heating efficiency.
Japanese Patent No. 2513829 JP-A-7-63351 JP 2001-336753 A

  However, as described above, two glass tube heaters are adopted in each of the upper and lower parts (total of four), and energizing all of them is difficult to put into practical use and cannot be easily implemented. Even if it can be carried out, an efficient heating action cannot be obtained. That is, the power capacity in a general household is set to an upper limit with reference to 15 A (ampere). Considering this, for example, it is practical to set the power of the two upper heaters to 400 W (accordingly, 400 W × 2 = 800 W) and set the two lower heaters to about 300 W (300 W × 2 = 600 W), respectively. Is the upper limit setting.

  This is because the electric power for each heater cannot be increased as described above, and the density of the heat quantity W per unit surface area of the heater (so-called W density) is low. It is difficult to obtain an effective heating effect, for example, results that require more than a minute. Moreover, in general, the oven cooking chamber has a flat area in which four pieces of bread can be set. For example, when toast cooking in the back (back) of the oven, the depth However, there was also a problem that it was difficult to put out and put in bread as deep as possible.

  In order to solve the problems as described above, glass tube heaters are provided on the front and rear sides of the upper and lower parts of the oven cooking chamber, respectively, and the heat density (W density) can be increased by efficiently controlling the energization of these heaters. An object of the present invention is to provide a microwave oven that can perform toast cooking quickly and has good operability.

In order to achieve the above object, the microwave oven of the present invention
An oven cooking chamber that is formed in a casing that forms an outer shell and accommodates and cooks food, a rotating mesh body that is rotatably provided in the oven cooking chamber, and that rotates the rotating mesh body. While heating the food, microwave heating means for irradiating the microwave generated from the magnetron, heater heating means for heating the food with the glass tube heater provided in the upper and lower parts of the oven cooking chamber, Control means for controlling the driving of each heating means and rotating mesh body,
The heater heating means has a configuration in which glass tube heaters are arranged on the front side and the rear side facing directly inside the upper and lower portions of the oven cooking chamber,
At the time of toast cooking, the control means is configured to heat and cook only the front upper and lower glass tube heaters with the rotating mesh body stopped (invention of claim 1).

  According to the above means, in the toast cooking by the two upper and lower glass tube heaters on the front side, the temperature rise is quick and the output of the two upper and lower heaters can be made larger than before (for example, the upper portion is 800 W, The lower part is set to 600 W), thereby increasing the heat density (W density) of the two glass tube heaters to be energized, and an increase in far infrared rays emitted from the tube surface can be expected. Therefore, toast cooking can be performed quickly, and a delicious toast can be obtained without removing moisture from the bread more than necessary, and the operation of putting in and out the bread placed and housed in the front side of the warehouse is easy, etc. Can provide a range.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
First, the schematic configuration of the microwave oven will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal side view showing a schematic configuration of the main part except the door of the microwave oven, and FIG. 2 is a front view of the same with the door removed. In the figure, a rectangular container-shaped oven cooking chamber 2 whose front opening is opened and closed by a door (not shown) is formed in a rectangular box-shaped casing 1 that forms an outer shell. It has a machine room (not shown) having a magnetron 4 and a high-frequency transformer 18 and has a known configuration such as an operation unit 3 (details will be described later) for setting a cooking menu or the like on the front side of the machine room. Yes.

  Therefore, in order to heat cook various foods stored in the oven cooking chamber 2, two different heating means are provided in this embodiment. One of the heating means is a microwave (high frequency) heating means generated by a well-known magnetron 4 (shown only in FIG. 4), and is directed to food in the warehouse via the waveguide 9 shown in FIG. This enables so-called range cooking. Another heating means is a heater heating means based on an electric heater, which is arranged at the upper and lower parts of the inside of the cabinet, and glass tube heaters 5a, 5b, 5c comprising quartz tubes arranged at the front side and the rear side, respectively. , 5d in total, all of which are arranged facing the interior, that is, directly facing the interior, so that so-called oven cooking and grill cooking are possible.

  In particular, the glass tube heaters 5a, 5b, 5c, and 5d have a rod-like configuration in which a coiled nichrome wire heater is arranged inside a straight tube-shaped quartz tube, and are arranged on the front side and the rear side of the upper part. The glass tube heaters 5a and 5b are extended in parallel in the left-right direction, and are respectively disposed in the recesses 6a and 6b of the upper reflecting plate 6 that also serves as the ceiling wall of the oven cooking cabinet 2. On the other hand, the glass tube heaters 5c and 5d disposed on the lower front side and the rear side are respectively extended in parallel in the left-right direction, and the recesses 7a of the lower reflector 7 serving also as the bottom wall of the oven cooking cabinet 2 are provided. 7b is provided in each case. In this case, it is good also as a structure which forms only the site | part which forms the said recesses 6a, 6b, 7a, 7b with a reflecting member.

  In addition, the front side and the rear side, which are the locations where the heater is disposed, divide the depth direction of the oven cooking chamber 2 into the front and rear, and at the substantially central positions of the front half and the rear half of the bisected chamber, The structure arrange | positioned in the left-right direction as mentioned above is shown. As for the electric capacity of the heating means, in this embodiment, the upper two glass tube heaters 5a and 5b generate heat at 800 W each, and the lower two glass tube heaters 5c and 5d generate heat at 600 W each. It is set as follows.

  Thus, the upper glass tube heater 5a and the lower glass tube heater 5c on the front side face each other vertically, and similarly, the upper glass tube heater 5b and the lower glass tube heater 5d on the rear side face each other vertically. In contrast, the heater heating means that directly faces the inside of the cabinet is configured. Incidentally, as shown in FIG. 1, rod-like protective members 8a and 8b extending in parallel in the vicinity of the upper portions of the lower glass tube heaters 5c and 5d are provided. This is provided to avoid collision of an object (for example, a cooking container not shown) from above with respect to the glass tube heaters 5c and 5d.

  Further, as shown in FIG. 1, a rotating net body 10 is provided substantially at the lower center of the oven cooking chamber 2. Although not shown in detail, the rotary mesh body 10 has a disk shape and a shape having a number of holes penetrating vertically, and is detachably connected to the drive shaft of the rotary motor 11 provided at the bottom. The motor 11 can be rotated by driving the motor 11. However, the lower glass tube heaters 5c and 5d are covered by the rotating mesh body 10, but the radiant heat is directly applied to the interior through many holes.

  1 and 2 show one piece of bread A such as bread (also referred to as toast A after cooking) as food placed on the rotating mesh body 10, the details will be described later. Although described in the description of the action of cooking, an arrangement place which is a usage pattern when toast cooking one piece of bread A is shown. Moreover, the hole shape of the rotating net | network body 10 should just be the structure which formed many comparatively big opening shapes so that the radiant heat from the downward | lower direction may act directly on the bread | pan A mounted on this.

Here, the operation unit 3 will be described with reference to an enlarged view illustrated in FIG.
The operation unit 3 includes a display unit 11 made of, for example, a liquid crystal display as a notification unit at the top, and is provided with an automatic cooking menu selection key 12, a start key 13, a cooking mode selection key 14, and the like. Of these, one toast cooking selection key 12a constituting the automatic cooking menu selection key 12 will be described. In addition to being a key for selecting toast cooking, the number of toasts is sequentially changed each time a pressing operation is performed. That is, it has a key function that allows a desired number of toasts to be selected and set. Then, the setting content as the selected use condition is displayed on the display unit 11 and is notified to the user, and details thereof will be described in the section of the subsequent operation description.

  Incidentally, although not described in detail, the automatic cooking menu selection key 12 includes cooking selection keys 12b, 12c and 12d, for example, for raw thawing, milk, and lunchboxes, respectively. The lower cooking mode selection key 14 includes a range cooking mode selection key 14a, an oven cooking mode selection key 14b, and a grill cooking mode selection key 14c. A control circuit 31 (see FIG. 4) including a microcomputer or the like to be described later is provided on the back side of the operation unit 3.

Next, an outline of the electric circuit diagram shown in FIG. 4 will be described.
One side of the power plug 15 connected to a 100V commercial AC power source is connected to the bus L1, the first door switch 16, the first relay switch 17, and the primary coil 18a of the high-frequency transformer 18, and the other side is connected to the bus L2, A fuse 38, a thermal switch 19, and a second door switch 20 are connected. Each of the door switches 16 and 20 is turned ON / OFF in response to a door (not shown) that opens and closes the front opening of the oven cooking chamber 2, and is turned ON when the door is closed. A secondary coil 18b and a filament coil 18c are provided on the secondary side of the high-frequency transformer 18, and a magnetron driving circuit 30 for driving the magnetron 4 is connected to the secondary coil 18b.

  In addition, between the buses L1 and L2, a short switch 21 that is turned ON / OFF opposite to the door switches 16 and 20, a series circuit of an interior light 22 and a relay switch 23, cooling and storage of the magnetron 4, etc. A series circuit of a fan motor 24 and a relay switch 25 for internal ventilation, a series circuit of a rotation motor 26 and a relay switch 27 of the rotary network 10, and a heater drive circuit 28 are connected to each other. Among them, the heater drive circuit 28 includes relay switches 29a and 29b connected in series to the four glass tube heaters 5a, 5b, 5c and 5d provided facing the inside of the oven cooking chamber 2, respectively. , 29c, 29d.

  Further, a control circuit 31 having a microcomputer, an A / D converter and the like is provided between the buses L1 and L2. However, each of the relay switches 17, 23, 27, 29a to 29d has a normally open switch configuration, and these relay coils are respectively connected to a relay drive circuit (not shown) included in the control circuit 31. ON / OFF control is performed (see FIG. 5). In addition, a third door switch 32 and a thermistor 33 as an internal temperature sensor are connected. Therefore, the control circuit 31 can control various types of cooking based on the input from the operation unit 3, the internal temperature detection signal from the thermistor 33, and the control program stored in advance.

In addition, FIG. 5 is an operation explanatory diagram for explaining the control contents at the time of toast cooking. In particular, the ON / OFF operation states of the relay switches 29a to 29d which are the control contents of the heater driving circuit 28 according to the number of toasts. The details are described in the following explanation of the operation.
FIGS. 6 and 7 are diagrams corresponding to FIGS. 1 and 2 showing different modes of use, and will be described with reference to the following description of the operation as appropriate.

  Next, the operation in the case of toast cooking in the microwave oven having the above configuration will be described. First, a menu setting corresponding to how many toasts of bread are to be operated and determined by the operation unit 3. That is, the toast cooking selection key 12a is selected and pressed from the automatic cooking menu selection key 12 shown in FIG. At the same time, the toast cooking selection key 12a also functions as a toast number selection key, so that the number of toasts is selected and set by the pressing operation, and the control circuit 31 receives the input signal, as shown in FIG. The heater drive circuit 28 corresponding to the ON / OFF control is performed, and in addition, in this embodiment, the rotation control of the rotary mesh body 10 can be performed.

  Hereinafter, a detailed description will be given based on FIG. 5. When the toast cooking selection key 12 a is pressed, a corresponding operation condition is displayed on the display unit 11 to notify the user. For example, on the display unit 11 shown in FIG. 3, the characters “Toast 1 to 2” and “Front heater” are displayed, and if this matches the use conditions, the user displays the display content “Front heater”. Based on this, for example, one sheet of bread A is placed at the center of the front half of the rotating net 10 as shown in FIGS. Then, when the door (not shown) is closed and the start key 13 of the operation unit 3 is pressed, toast cooking starts.

  At the start of cooking, the heater drive circuit 28 is ON / OFF controlled by the control circuit 31 as shown in FIG. 5. In this case, the relay switches 29a and 29c are turned ON, and only the upper and lower glass tube heaters 5a and 5c are turned on. The pan A which is energized and is disposed between the opposed members is heated by radiant heat. In this case, the radiant heat from the glass tube heaters 5a and 5c directly acts on the pan A, and toast cooking is performed quickly and efficiently. In addition, the control circuit 31 calculates cooking time according to the number of toasts, and enables automatic cooking by detecting the internal temperature at the time of start with the thermistor 33 (refer FIG. 4). Further, as shown in FIG. 5, the rotary mesh body 10 is maintained in the stopped state because the relay switch 27 is maintained in the OFF state.

  Moreover, toast cooking can be performed in different usage patterns even under the conditions of one to two toasts as described above. When the toast cooking selection key 12a is further pressed, the characters “Toast 1-2” and “Rear heater” are displayed on the display unit 11 to inform the user. That is, toast cooking using the glass tube heaters 5b and 5d on the rear side can be executed (see FIG. 5).

  In addition, in this embodiment, as shown in FIG. 5, the relay switch 27 that drives and controls the rotary mesh body 10 operates “ON-OFF-ON” after the start of cooking, and the motor 26 is driven and controlled intermittently. Along with this, the rotating mesh body 10 performs a “rotation-stop-rotation” operation, and the ON operation is time control equivalent to half rotation of the rotating mesh body 10 (instead of this time control). It is also possible to adopt a rotation detection means).

  Therefore, when the user places a sheet of bread A on the rotating mesh body 10 corresponding to the center of the front half of the cabinet in the same manner as described above and starts the same as described above, the relay is performed as described above. With the initial ON operation of the switch 27, the rotary mesh body 10 rotates half a turn. As a result, the pan A moves from the central position of the front half in the cabinet to a state where it is arranged at the center of the rear half as shown in FIGS. 6 and 7, and is held at this position. Thereby, the bread | pan A can obtain the suitable arrangement | positioning state located between the glass tube heaters 5b and 5d of the back side, and can toast-cook efficiently with this heater 5b and 5d.

  Then, when the cooking time corresponding to the OFF period of the relay switch 27 elapses and the toast cooking is completed, the relay switch 27 is turned ON again to rotate the rotary mesh body 10 by half. As a result, the bread A accommodated in the latter half of the cabinet, in this case, the toast A that has been cooked is moved to the first half simultaneously with the end of cooking. In this way, the user does not perform the operation of putting in and out the bread (toast) A to the back, which is the latter half of the chamber, and this is a cooking operation considering safety without touching the hot inner wall surface with fingers. Can be executed easily.

  Next, when 3 to 4 pieces of toast are cooked, the toast cooking selection key 12a is further pressed to display on the display unit 11, for example, "3 to 4 pieces of toast", "front / rear heater" In other words, the user is informed that the toast cooking is performed using all the glass tube heaters 5a to 5d according to the selection of the number 3 to 4 of the toasts and the number of the toasts. Therefore, for example, four pans A are placed on the rotary mesh 10 and the start key 13 is operated to start.

  However, in this embodiment, when all the upper glass tube heaters 5a (800W) and 5b (800W) and the lower glass tube heaters 5c (600W) and 5d (600W) are energized at the same time, It exceeds the electrical capacity. Therefore, in this embodiment, as shown in FIG. 5, the relay switches 29a to 29d are controlled, that is, the front glass tube heaters 5a (800W) and 5c (600W) and the rear glass tube heaters 5b (800W). , 5d (600 W), and these are alternately energized. Accordingly, the toast cooking of four sheets can be performed smoothly and efficiently by increasing the heat density (W density) of the heater.

As described above, the above embodiment has the following effects.
As the heater heating means, a total of four glass tube heaters 5a, 5b, 5c, 5d are arranged on the upper and lower sides of the oven cooking chamber 2 so as to face the interior directly and on the front side and the rear side, respectively. The control circuit 31 serving as the control means stops the rotating mesh body 10 on which the pan A is placed, and the front upper and lower glass tube heaters 5a corresponding to the pan A as shown in FIGS. Only 5c was energized.

  As a result, the glass tube heaters 5a and 5c can directly apply radiant heat to the pan A in addition to the characteristic that the temperature rises originally fast, and toast cooking can be performed efficiently and quickly, for example, within 3 minutes. Time can be shortened. In addition, the use of the upper and lower glass tube heaters 5a and 5c on the front side is suitable for the case where the number of toasts is 1 to 2 and the operation of putting in and out the bread (or toast) A as the food is performed in the oven cooking chamber 2. Since it only needs to be performed in the first half, it can be easily operated and can be operated safely without the fingers touching the inner wall surface.

  In contrast to the use of the front heater described above, toast cooking in which only the rear upper and lower glass tube heaters 5b and 5d are energized is also possible. In this case, it is suitable for 1 to 2 toast cooking as quickly as above, but as shown in FIG. 6, the radiant heat in the back of the cabinet is effective without escaping from the front door (not shown) portion. It can be used, and it is considered more advantageous for uniform finish of toast and shortening of time. On the other hand, it is also effective in that toast cooking can be performed by selecting so-called front heater use or rear heater use according to the preference of each household (user) such as the delicate baking condition.

  In addition, at least one of the start and the end of toast cooking, the rotating net body 10 is rotated halfway and stopped. Therefore, for example, if the pan A rotates halfway at both the start and end, if the pan A is placed on the rotary mesh 10 located in the front half of the cabinet before the start, it moves to the latter half of the cabinet simultaneously with the start. The toast A after being cooked and then cooked at the end can be moved to the front half of the cabinet. This eliminates the need for troublesome operations such as inserting a hand into the back of the latter half of the cabinet and placing the pan A on the rotating net 10 or taking out the toast A from the back at the end. It can be operated without the fingers touching the remaining wall surface, which is advantageous for safety.

  On the other hand, when 3 to 4 toasts are to be cooked at a time, it is only necessary to energize a total of four glass tube heaters 5a to 5d as described above. The capacity will be exceeded and cannot be adopted. However, if the calorific value (electric power) of each heater is reduced to a low capacity, the calorific density (W density) of the heater will decrease, and it will take a long time for toast cooking, or there will be more moisture than necessary. The problem is that the finished state is not good due to falling off.

  Therefore, in this embodiment, the heater heating means composed of a total of four glass tube heaters 5a to 5d is divided into two upper and lower parts on the front side and two upper and lower parts on the rear side. The power supply was controlled alternately. As a result, it is possible to set the capacity of the two heaters at the front and rear to the maximum that can be used. For example, as in this embodiment, the upper heater 800W and the lower heater 600W can be combined. (W density) can be greatly increased, and the far-infrared effect emitted from the tube surface is also satisfactorily exhibited, so that a delicious toast can be produced quickly without losing a large amount of water.

  In addition, the toast cooking selection key 12a in the present embodiment also functions as a so-called toast number selection key that can select a desired number of toasts by repeating the pressing operation as described above in addition to the selection of the toast cooking menu. Therefore, according to the number of toasts selected and set simultaneously with the selection of toast cooking, the control circuit 31 (see FIG. 5), as described above (see FIG. 5), only the front heater, only the rear heater, or the front and rear side. Heating control such as alternately energizing the heater is possible. As a result, the key arrangement in the operation unit 3 can be made compact.

  In addition, as a means for notifying the number of toasts and information according to the number, the information is displayed on the display unit 11 to notify the user. For example, as described above, the characters “Toast 1 to 2” and “Front Heater” are displayed on the display unit 11 so that the number of toasts and the corresponding front heaters (glass tube heaters 5a and 5c) are displayed. The display of using the item means that the bread A is arranged in the first half of the cabinet, and informs the user where the bread is placed. Therefore, the user can accurately know the location of the bread A according to the number of toasts, and can reliably perform desired toast cooking.

  For example, in the case of one or two toasts, the display may be a direct call to the user, such as “Place it on the front side” or “Place it on the rear side”. Furthermore, it is also possible to provide a microphone and use voice notification means in combination or independently. For example, in the case of voice notification, it can be easily known without reading on the display unit 11, or when used together, the character display remains even if the voice notification is missed, so it is practically effective. It is.

(Modification)
FIGS. 8 and 9 are modifications to the above embodiment. In particular, a heater drive circuit 34 is provided as a modification instead of the heater drive circuit 28. FIG. 8 is a diagram corresponding to FIG. 2, FIG. 9 is a diagram showing the heater drive circuit 34 of this embodiment alone, and the other parts are the same as those in the above embodiment, and the description is omitted. The differences will be explained.

  As shown in FIG. 9, the upper and lower glass tube heaters 5a and 5c are connected in series between the buses L1 and L2 to form a circuit configuration via the relay switch 35a. The glass tube heaters 5b and 5d are connected in series to form a circuit configuration via a relay switch 35b. As is clear from the above-described embodiment, the energization control is always performed for each pair of the upper and lower glass tube heaters 5a and 5c on the front side and the upper and lower glass tube heaters 5b and 5d on the rear side. Based on the above, they are connected in series, and can be toasted as in the above embodiment.

  However, FIG. 8 discloses the connection structure, and has a configuration in which, for example, a lead wire 36 is connected at the left end of the upper glass tube heater 5a and the lower glass tube heater 5c on the front side. The upper glass tube heater 5b and the lower glass tube heater 5d on the rear side are similarly connected by a lead wire 37, and only the reference numerals are also shown in FIG. 8 (see also FIG. 9). Thus, the lead wires 36 and 37 can be connected using the space between the side wall of the oven cooking chamber 2 and the side wall of the housing 1 as shown in FIG.

  According to such a configuration, it is extremely simple as compared with the above-described embodiment, and is excellent in safety and workability and can be provided at low cost. That is, in the above embodiment, as is apparent from the circuit configuration (heater drive circuit 28) in FIG. 4, the glass tube heaters must be connected, and the control circuit 31 is located on the right side shown in FIG. For example, the connection at the left end of each glass tube heater 5a to 5d in FIG. 7 is routed through the top surface of the oven cooking chamber 2 or the bottom surface of the bottom. For this reason, countermeasures for high-temperature parts due to heater heating, connection work in narrow places, and the like are required.

  On the other hand, according to the modified example shown in FIG. 8, it is possible to make a connection by effectively using the left side space of the oven cooking chamber 2 which is neither a high temperature part nor a narrow part, As is apparent from the circuit configuration of the heater drive circuit 34 in FIG. 9, the number of relay switches can be reduced. Therefore, compared to the above embodiment, the connecting work of the lead wires 36 and 37 is simple and effective in that it is excellent in safety and workability and low cost.

  The present invention is not limited to the embodiment described above and shown in the drawings. For example, the selection of the number of toasts by the toast cooking selection key disclosed in FIG. 3 is in units of 1-2 and 3-4. However, it may be in four stages of 1 to 4 sheets per sheet, and the display part by the notification means or the notification contents by voice can be changed as appropriate.

  In addition, the food for toast cooking is not limited to the above-described cut bread, but may be a roll bread or pizza as long as it can be cooked by the heater heating means. Furthermore, following the toast cooking by the heater heating means, heating with the microwave heating means can be performed for a short time (for example, 5 to 6 seconds), so that a toast with good plump finish can be obtained. Various modifications can be made without departing from the scope of the present invention.

1 is a longitudinal side view showing a schematic configuration of a microwave oven according to an embodiment of the present invention. Front view with the door removed Enlarged view of the operation unit Electrical diagram Action explanatory drawing for demonstrating the control content of the principal part at the time of toast cooking 1 equivalent diagram showing different usage patterns Same as Figure 2 FIG. 1 equivalent view showing a modification Electric circuit diagram showing only heater drive circuit

Explanation of symbols

  In the drawings, 1 is a housing, 2 is an oven cooking chamber, 3 is an operation unit, 4 is a magnetron, 5a, 5b, 5c and 5d are glass tube heaters, 9 is a waveguide, 10 is a rotating network, and 11 is a display. (Notification means), 12 is an automatic cooking menu selection key, 12a is a toast cooking selection key (toast number selection key), 13 is a start key, 28 and 34 are heater driving circuits, 30 is a magnetron driving circuit, and 31 is a control A circuit (control means) is shown.

Claims (7)

An oven cooking chamber that is formed in a housing that forms an outer shell and that contains food and cooks;
A rotating mesh body that is rotatably provided in the oven cooking chamber and on which food is placed;
In order to heat the food while rotating the rotating mesh body, microwave heating means for irradiating the microwave generated from the magnetron,
In the glass tube heater provided in the upper and lower parts of the oven cooking chamber, a heater heating means for heating food,
Control means for controlling the driving of each heating means and rotating mesh body,
The heater heating means has a configuration in which glass tube heaters are arranged on the front side and the rear side facing directly inside the upper and lower portions of the oven cooking chamber,
In the toast cooking, the control means is configured to heat and cook only the front upper and lower glass tube heaters while the rotating mesh body is stopped. An oven cooking chamber that is formed in a housing that forms an outer shell and that contains food and cooks;
A rotating mesh body that is rotatably provided in the oven cooking chamber and on which food is placed;
In order to heat the food while rotating the rotating mesh body, microwave heating means for irradiating the microwave generated from the magnetron,
In the glass tube heater provided in the upper and lower parts of the oven cooking chamber, a heater heating means for heating food,
Control means for controlling the driving of each heating means and rotating mesh body,
The heater heating means has a configuration in which glass tube heaters are arranged on the front side and the rear side facing directly inside the upper and lower portions of the oven cooking chamber,
During toast cooking, the control means is configured to heat and cook only the upper and lower glass tube heaters on the rear side while the rotating mesh body is stopped.   3. The microwave oven according to claim 2, wherein the control means is configured to stop the rotary mesh body by half-turning at least one of the start and end of toast cooking. An oven cooking chamber that is formed in a housing that forms an outer shell and that contains food and cooks;
A rotating mesh body that is rotatably provided in the oven cooking chamber and on which food is placed;
In order to heat the food while rotating the rotating mesh body, microwave heating means for irradiating the microwave generated from the magnetron,
In the glass tube heater provided in the upper and lower parts of the oven cooking chamber, a heater heating means for heating food,
Control means for controlling the driving of each heating means and rotating mesh body,
The heater heating means has a configuration in which glass tube heaters are arranged on the front side and the rear side facing directly inside the upper and lower portions of the oven cooking chamber,
At the time of toast cooking, the control means heats the two upper and lower glass tube heaters on the front side and the two upper and lower glass tube heaters on the rear side alternately while heating the rotating mesh body. Microwave oven characterized by cooking.   The front upper glass tube heater and the lower glass tube heater, and the rear upper glass tube heater and the lower glass tube heater are connected in series, respectively. The microwave oven in any one.   A toast number selection key is provided and only the front upper and lower glass tube heaters are energized, or only the rear upper and lower glass tube heaters are energized, or front and rear, depending on the toast number setting by the key operation. The microwave oven according to any one of claims 1, 2, and 4, wherein an alternate energization of each of the upper and lower glass tube heaters on the side can be switched and selected.   7. The microwave oven according to claim 6, further comprising an informing means for informing a location of the toast according to the number of toasts set.

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