JPH04332318A - Oven toaster - Google Patents

Abstract

PURPOSE:To reduce size, enhance burning distribution performance and improve the efficiency of energy by connecting a rotary shaft of a motor with a shaft supporting section which projects downward in the central part of a grill and forming the central part of a coil-shaped heating wire of upper heaters and lower heaters closely from both ends. CONSTITUTION:A shaft supporting section 18 is formed in the lower part of a grill 14 installed between heaters 13 and 15 laid out up and down in a cooking box 11 and connected with a rotary shaft 16 of a motor 16 installed to the lower part of the cooking box 11 while there are installed a reflecting plate 19 and a change over switch 20 at the same time between the rotary shaft 16 and the heater 15. Furthermore, the heater 13 and 15 are formed by heating wires which are densely formed in the central part and thinly formed at both ends with insulation pipes and coil shape. It is therefore, possible to equalize heating, speed up cooking and carry out heating proper for cooking and reduce size as well.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toaster oven for general household use.

0002

2. Description of the Related Art Conventionally, this type of toaster oven has had a structure as shown in FIG. 2, as shown in, for example, Japanese Utility Model Application Publication No. 60-25816.

That is, upper and lower heaters 3 and 4 are suspended on the side wall of an inner casing 2 forming a cooking chamber 1, and the upper and lower heaters 3,
4, a grill 5 is interposed between the opening and closing of the door 6 so as to be freely forward and backward. The food 7 was then placed on the gridiron 5 to be heated and cooked.

By the way, in such a configuration, the food 7 to be cooked is
The area near the center near the lower heater 4 receives very strong radiant heat and convection, making it easy to burn. Therefore, in order to be able to bake the food 7 uniformly, as shown in the figure, an inclined surface 8 is provided directly below the lower heater 4 to disperse the radiant heat of the lower heater 4 to the front and rear ends of the food 7. Also,
Radiant heat and convection are shielded between the food 7 and the lower heater 4 9
Efforts have been made to provide In addition, the upper surface of the food 7, which is difficult to obtain an effect due to such a structure, is provided with a multi-sided reflective plate 10 forming a part of the inner casing 2, so that the radiant heat is dispersed to the front and rear ends of the food 7. The structure was such that it baked evenly as a whole.

[0005]

[Problem to be Solved by the Invention] However, if such a device is used, not only will the toaster oven have a very complicated structure, but also the radiant heat and convection from the upper and lower heaters 3 and 4 will be blocked or dispersed. Therefore, energy efficiency is extremely poor, and there are also problems in that a space distance greater than necessary must be provided in order to weaken the influence of radiant heat directly below the upper heater 3. Furthermore, even if the heating is uniform at first, there is a problem in that once the inner casing 2 becomes dirty, the heating becomes uneven.

[0006] The present invention solves these conventional problems, and has a compact shape, excellent toasting distribution performance, and
The purpose is to provide a toaster oven with excellent energy efficiency.

[0007]

[Means for Solving the Problems] The present invention includes an inner casing forming a cooking compartment, and upper and lower heaters in which coiled heating wires are incorporated in straight insulated pipes installed in the inner casing. In a toaster oven equipped with a grill grate disposed between the upper and lower heaters, a shaft support projecting downward is formed in the center of the grill grate, and a rotating shaft of a motor is connected to the shaft support. In addition, the coil-shaped heating wires of the upper and lower heaters are configured such that the heater pitch is closer in the center portion than in both ends thereof.

[0008] Furthermore, a reflecting plate is provided between the rotary shaft of the heater and the lower heater in parallel with the lower heater.

[0009] Furthermore, in addition to providing two upper and lower heaters each, a changeover switch is provided to control the energization of these two heaters, and a lower heater is provided below the grill with the rotating shaft of the motor in between. have.

0010

[Operation] According to the above structure, the rotation of the motor rotates the grill and the food placed on the grill also rotates.

[0011] Since the pitch of the coil heaters is made closer in the central part of the upper and lower heaters than in both ends thereof, when the grill is rotated, the center of rotation of the grill, which does not pass through the shortest distance plane between the upper and lower heaters, is the same as other peripheral parts. It can be heated to high heat and the whole thing can be baked evenly.

[0012] Furthermore, by providing a reflection plate between the rotating shaft of the motor and the lower heater in parallel with the lower heater, the radiant heat generated from the lower heater can be efficiently irradiated onto the food on the grill, and the motor The radiant heat to the rotating shaft can be shielded, the temperature rise of the motor can be reduced, and the durability of the motor can be improved.

Furthermore, by providing two upper and lower heaters each, and arranging the lower heater below the grill with the motor rotating shaft in between, and providing a changeover switch to control the energization of these two upper and lower heaters, Even if the number of energized upper and lower heaters is changed, the food to be cooked can be uniformly heated by the rotation of the grill even if there is a difference in heating heat amount, and heating suitable for the food to be cooked can be performed. Furthermore, by using two heaters, one on the top and one on the bottom, the heating power can be increased, the heating speed can be increased, and the temperature rise value of the heaters can be reduced, which also improves the durability of the heaters.

[0014]

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

In FIGS. 1 and 2, 11 is a cooking cabinet, 12
1 is an inner casing forming the cooking chamber 11, and 13 is an upper heater suspended from the upper side wall of the cooking chamber 11, of which two are provided. 14 is a grill.

15 is suspended on the lower side wall of the cooking chamber 11;
There are two lower heaters located below the grill.

16 is a motor provided at the bottom of the main body, and 17 is a rotating shaft of the motor. Reference numeral 18 denotes a shaft support projecting downward in a conical shape from the center of the gridiron, and is provided with a recess into which the rotating shaft 16 of the motor is removably inserted.

Reference numeral 19 denotes the rotating shaft 16 of the motor and the lower heater 15.
In between are reflective plates attached to the lower part of the inner casing 12 so as to be inclined parallel to the lower heaters 15, and are provided in accordance with the number of lower heaters 15.

Reference numeral 20 denotes a changeover switch for controlling energization of the upper heater 13 and lower heater 15.

The lower heater 15 is provided to sandwich the rotating shaft 16 of the motor. 21 is a food placed on the gridiron 14;

Reference numeral 22 denotes a door that opens and closes the upper front side of the cooking cabinet 11. FIG. 3 is a cross section of the upper heater 13 and the lower heater 15, showing the insulating pipe 23 and the heating wire 2 formed into a coil shape.
The heating wire 24 has a heater coil pitch that is densely formed in the center and sparser in both ends than in the center.

Next, the operation of the above embodiment of the present invention will be explained. When the upper heater 13 and the lower heater 15 heat the food 21 placed on the grill 14, the motor 16 rotates the rotating shaft 17, which rotates the grill 14 via the shaft support 18 to start cooking. The food 21 also rotates, and the food 21 passes through the shortest distance between the upper heater 13 and the lower heater 15, except for the vicinity of the shaft support 18 of the grill 14, and is baked uniformly. Furthermore, for the food 21 that does not pass through the shortest distance between the upper heater 13 and the lower heater 15, the upper heater 13 and the lower heater 1
Due to the dense coil pitch of the heater in the central part of the heating wire 24 of No. 5, stronger axial radiation heat is applied to the central part of the heating wire 24, and the same axial radiation heat is applied to the food 21 in the vicinity on the shaft support 18 as in the peripheral part. The food 21 can be baked evenly.

[0023] Also, the rotation shaft 17 of the motor and the lower heater 15
During this period, the radiant heat generated from the lower heater 15 is reflected by a reflector 19 installed below the grill 14 and inclined parallel to the lower heater 15, thereby heating the food 21 and directing it to the rotating shaft 17. The lower heater 15 can be connected to the rotating shaft 1, thereby reducing the temperature rise of the motor 16.
7, making it possible to downsize the main body.

Furthermore, when the food 21 to be cooked is bread or the like, the bread layer falls downward from the grill, but the reflective plate 19 can prevent it from falling near the rotating shaft 17, and the motor 16
This makes it difficult for bread layers etc. to penetrate into the parts, further improving the reliability of the motor.

[0025] Furthermore, two lower heaters 1
5, the radiation distribution rotates uniformly even if the radiation intensity changes when only one lower heater 17 is energized and when both lower heaters 17 are energized by operating the changeover switch 20. can be added to item 21, and
By increasing the radiation intensity, the heating speed can be accelerated and the usability can be improved.

Furthermore, by using two lower heaters 15, the temperature of the heating wire 24 can be lowered, and the durability of the heating wire 24 can be extended.

As described above, according to the configuration of the embodiment of the present invention, the coiled heating wires 2 of the upper heater 13 and the lower heater 15
By making the center part of the heater pitch 4 dense and the peripheral part sparse, the food 21 in the vicinity of the shaft support 18 can be baked in the same way as other parts, and the upper heater 13 and lower heater Even if the food 15 is brought close to the food 21, the food can be baked evenly, making it possible to downsize the toaster oven.

Furthermore, by providing a reflection plate 19 parallel to the lower heater 15 between the rotating shaft 17 of the motor and the lower heater 15, the radiant heat from the lower heater 15 can be reflected to the food 21, making the radiant heat effective. In addition, it is possible to shield the radiant heat from the rotating shaft 17.
The temperature rise of the motor 16 can be reduced, and the durability of the motor is improved.

Furthermore, bread layers and the like falling from the food to be cooked 21 are less likely to enter the motor section, and the reliability of the motor is also increased.

Furthermore, it is possible to bring the lower heater 15 close to the rotating shaft 17, and the toaster oven can be made smaller.

Furthermore, two heaters 17 are installed with the rotating shaft 17 in between.
By providing a changeover switch to control the power supply to the heaters, food can be cooked evenly even when only one lower heater is energized or both are energized, and the heat source is adjusted to the appropriate heat for the food being cooked. By increasing the heat, the cooking speed becomes faster and the usability can be improved. Further, by using two lower heaters 15, the temperature of the heating wire 24 can be lowered, and the durability life of the heating wire 24 can be extended.

[0032]

Effects of the Invention As is clear from the above description, the toaster oven of the present invention has a downwardly protruding shaft support in the center of the grill, and this shaft support is detachably connected to the rotating shaft of the motor. Since the pitch of the heaters in the center of the upper and lower heaters is closer than that of the edges, the rotation of the grill also rotates the food, and the food does not pass through the shortest distance between the upper and lower heaters near the shaft support. Even if the upper and lower heaters are close to the food, the entire surface, including the food, can be baked evenly.

Furthermore, by providing a reflector parallel to the lower heater between the rotating shaft of the motor and the lower heater, the heat of the lower heater can be used more effectively for heating food, and the heat from the lower heater can be used more effectively to heat the food. This reduces the heat shielding of the motor, reduces the temperature rise of the motor, improves the durability of the motor, and allows the lower heater to be moved closer to the rotating shaft, making it possible to downsize the toaster oven.

[0034] Furthermore, by arranging two upper and lower heaters each with the rotating shaft in between, and providing a changeover switch to control the energization of the heaters, the food can be baked evenly even if the number of energized heaters is changed. In addition, heating suitable for the food to be cooked can be performed, high heat power is also possible, speed of cooking and heating is increased, and usability can be improved.

As described above, according to the present invention, uniform heating, speeding up of cooking, and heating suitable for the food to be cooked are possible, and a toaster oven that is easy to use and easy to use can be provided.

Furthermore, the toaster oven can be made smaller and the durability of the motor and heater can be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a toaster oven showing an embodiment of the present invention.

[Fig. 2] Fig. 2 is a cross-sectional view of the toaster oven.

[Figure 3
] Figure 3 is a vertical cross-sectional view of the upper and lower heaters of the toaster oven.

[Fig. 4] Fig. 4 is a vertical cross-sectional view of a conventional toaster oven.

[Explanation of symbols]

11 Cooking room 12 Inner case 13 Upper heater 14　　　Grilling net 15 Lower heater 17 Rotation axis 18 Axis branch 19 Reflector 20 Changeover switch

Claims (3)

[Claims] [Claim 1] An inner casing forming a cooking compartment, an upper and lower heater in which a coiled heating wire is installed in a straight insulated pipe installed in the inner casing, and a heater disposed between the upper and lower heaters. In a toaster oven equipped with a grill grate, a shaft support projecting downward is formed in the center of the grill grate, a rotating shaft of a motor is connected to the shaft support, and a coil-shaped coil of the upper and lower heaters is connected to the shaft support. The coil pitch of the heater is made closer to the central part of the heating wire than the opposite ends thereof. 2. A toaster oven comprising an inner casing forming a cooking chamber, a lower heater installed in the inner casing, and a grilling grate disposed above the lower heater, wherein the grilling grate is A shaft support projecting downward is formed in the center part, and the rotating shaft of the heater is connected to the shaft support, and a reflecting plate is arranged parallel to the lower heater between the rotating shaft of the motor and the lower heater. Toaster oven. 3. An inner casing forming a cooking chamber, two upper and lower heaters each having coiled heating wires incorporated in straight insulated pipes installed in the inner casing, and the upper and lower heaters. In a toaster oven equipped with a grill arranged between the grill, a shaft support projecting downward is formed in the center of the grill, and a rotating shaft of a motor is connected to the shaft support. This toaster oven is equipped with a changeover switch that controls the energization of the upper and lower heaters, and the lower heater is located below the grill, sandwiching the motor's rotating shaft.