JPS58156127A - Heating cooker - Google Patents

Abstract

PURPOSE:To uniformly heat the inside of a cooker, by providing suction pores in the center of a partition plate which is provided between a combustion chamber and a heating chamber, and blow-off pores in the upper, in the middle and in the lower parts on the periphery of a partition plate, so as to circulate hot-air to the surfaces and the backsides of bottoms of cooking trays out on both upper and lower stages, respectively, in a heating cooker of hot-air circulated type. CONSTITUTION:The current of hot air and combustion gas from a burner, sucked from suction pores 4, provided in the center of a partition plate 3, are fed into a circulating air heating chamber 46 by a circulating fan 11 from a suction port 51, passing through a blow-off line 52 while they are mixed with each other, and are fed into a heating chamber 1 from blow-off pores 5 which are provided on the periphery of a partition plate 3. At this time, the mixed air comes back into a combustion chamber 2 from the suction pores 4 in such a manner that the air from upper blow-off ports 5a goes horizontally above the tray 6a on the upper stage, the air from blow-off ports 5c on the lower stage goes horizontally along the bottom surface of a tray 6b on the lower stage, and the air from blow-off ports 5b on the middle stage goes through the bottom surface of the tray 6a on the upper stage and the above side of the tray 6b on the lower stage, respectively. In such a structure, uniform heating can be provided to the titled cooker because hot-air can be spread horizontally along the upper surface and the backside of a bottom of each tray.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called hot air circulation heating cooking device in which heat generated in a heating device is guided into a heating chamber by a circulation fan to raise the temperature inside the heating chamber.

Conventionally, in this type of hot air circulation type heating cooker, Fig. 1,
Partition plate 3 that partitions heating chamber 1 and combustion box 2 as shown in Fig. 2
The hot air inside the heating chamber 1 is sucked in through the suction port 4 provided in the center of the partition plate 3, and the high-temperature hot air is blown out into the heating chamber 1 through the Suita port 6 provided on the right and left peripheral portions of the partition plate 3. So,
The heated object 7 placed on the periphery of the saucer 6 is easily hit by the high-temperature hot air blown out from the outlet 6. Therefore, the heated object 7 placed on the periphery of the saucer 6 dries and loses moisture on its surface. It evaporated and became hard and the taste deteriorated, and it was also overheated and the heating was uneven between the center and the periphery.

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned conventional drawbacks, and aims to achieve more uniform heating by uniformly distributing heated hot air within a heating chamber.

Particularly in two-stage cooking and heating, the object is to more uniformly heat the objects placed on the upper and lower stages.

In order to achieve the above object, the cooking device of the present invention includes a heating chamber for storing an object to be heated, a saucer for placing the object to be heated, and a combustion chamber that is connected to the heating chamber via a partition plate. , comprising a heating means provided in the combustion chamber, and a fan device for circulating hot air in the combustion chamber between the heating chamber and the combustion chamber, and an inlet located approximately in the center of the partition plate; In addition to providing each outlet with a large number of openings around the periphery, the outlet is divided into three parts: an upper outlet, a middle outlet, and a lower outlet, thereby achieving more uniform heating. possible.

In addition, in a heating cooker for cooking in two stages (top and bottom), the partition plate has a suction inlet approximately in the center, and a number of openings on the left and right periphery, and an outlet divided into three parts: upper, middle, and lower. and the upper air outlet is set higher than the upper surface of the upper tray, and the middle air outlet is lower than the lower surface of the upper tray and higher than the upper surface of the lower tray. The structure is such that the lower saucer is installed at a position lower than the bottom surface of the tray, so that the high-temperature hot air does not directly hit the object to be heated, and the heat distribution between the center and the periphery is uniform without drying out the object to be heated, thereby reducing uneven heating. This method allows cooking without heating.

An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 3 to 5, there is a heating chamber 1 in a main body 8 in which an object to be heated 7 is heated. In the front opening of heating chamber 1,
A door 12 is provided so as to be openable and closable. A power feed port 13 is provided in the earthen wall of the heating chamber 1, and is connected to a magnetron 14, which is a high frequency generator, through a waveguide 16, and radiates high frequency waves into the heating chamber 1. A magnetically driven rotary mounting table 17 is installed on the bottom wall of the heating chamber 1, which is covered with a cover 16 made of a dielectric material to prevent food particles, water vapor, etc. from entering the wave tube 16. A rotatable saucer 6 is placed thereon.The rotary table 17 is driven by a cooling fan motor 18, and a pulley A installed on the motor shaft 19 drives the rotating table 17.
Drives the pulley B23 attached to the worm gear 22 via the bell) A21, and further drives the pulley B23 attached to the output shaft 24 of the worm gear 22.
Pulley D27 is driven via 6, and pulley E29 is connected to pulley D27 via pulley shaft 2B.
Pulley E29 is interlocked. From pulley E29 to bell jC
Pulley F31 attached to the bottom wall outside the heating chamber via F30
is driven and rotates. When the goo IJ if'31 rotates, the magnet A32 attached to the boo IJ F 31 rotates,
Magnet A32 and magnet B provided at the bottom of the transfer table 17
33 attract each other by magnetic force, and the rotary mounting table 17 supported by the rollers 34 rotates. The bottom wall of the heating chamber 1 and the metal plate 36 to which the magnet is attached are made of stainless steel,
It is made of a non-magnetic metal plate such as aluminum, and is designed to conduct magnetism.

The magnetron 14 is cooled by the cooling fan 36 attached to one end of the motor shaft 19 of the cooling fan motor 18 . The cooled air passes through the air guide 37.

A part of the air passes through an opening provided in the earthen wall of the air guide 37 between the earthen wall outside the heating chamber 1 and the earthen wall of the main body 8, and is exhausted to the outside from the exhaust cover 38. After entering the heating chamber 1 through the punched hole 39 in the side wall, the heating chamber 1
The air is discharged to the outside through an exhaust cover 38 from an exhaust guide 41 connected to an exhaust hole 4o in the earthen wall. 42 is heating chamber 1
Insulating material on the outer upper wall, 43 is a heat insulating plate on the outer wall of heating chamber 1, 44
is an open lamp provided within the air guide 37. A combustion chamber 46 and a partition plate 3 having an inlet 4 approximately in the center of the back of the heating chamber 1, and an outlet 5 divided into three parts on the right and left peripheries (upper outlet 5a, middle outlet sb1, lower outlet 5c).
A combustion box 2 having a circulating air heating chamber 46 and a circulating fan storage chamber 47 is provided. The heating chamber 1 and the combustion box 2 are separate bodies, and the combustion box 2 is attached to the back of the heating chamber 1 via screws. The combustion chamber 46 is located at the lower part of the combustion box 2, and the combustion air inlet 4 is located at the lower part of the peripheral wall.
8 and a combustion gas passage 49 opening into the circulating air heating chamber 46 is formed in the top wall, and two main burners 9a and one pilot burner 9b are housed therein. Further, the circulating air heating chamber 46 is formed so as to surround the suction port 4 of the partition plate 3 by the partition wall 60, and the suction port 5 is opposite to the suction side of the circulation fan 11 provided in the circulation fan storage chamber 47.
In addition, both sides of the circulation fan storage chamber 47 extend to the partition plate 3, and a blowout system path 62 is connected to the blowout ports 6 (upper blowout port 5a, middle blowout outlet SB, lower blowout outlet SC).
It consists of The fan device 1o is composed of a circulation fan 11, a circulation fan motor 63 for driving the circulation fan 11, a cooling fan 64 for cooling the circulation fan motor 63, a circulation fan storage chamber 47 serving as a casing, etc.
The circulation fan 11 is detachably attached to a circulation fan motor shaft 66 via a fan attachment screw 56.

With the above configuration, the heat flow flows out from the heating chamber 1 through the suction port 4 provided approximately at the center of the partition plate 3.The high-temperature combustion gas from the burner 9 that passes through the combustion gas passage 49 is heated by circulating air. It flows into the chamber 46, is sucked by the circulation fan 11 through the suction port 51, and flows into the blowout system path 62. In the process from suction to blowout, both heat flows are sufficiently mixed by the merging and mixing action and the stirring action of the circulation fan 11, resulting in a high-temperature mixed gas with uniform temperature. The above-mentioned high-temperature mixed gas is immediately blown into the heating chamber 1 from the blow-off ports 5 (the top blow-off port 5a, the middle blow-off port sb, and the bottom blow-off port 6c) provided at both ends of the partition plate 3. From the upper air outlet 6a to the heating chamber 1
As shown in FIGS. 3 to 5, the high-temperature hot air blows out while spreading horizontally on the surface above the heated object 7 of the upper tray 6a and hits the door 12 in the front. The hot air that hits the door 12 is sucked by the circulation fan 11, so it flows through the space between the earthen wall of the heating chamber 1 and the upper tray 6a, passes through the center of the upper tray 6a, and is installed on the partition plate 3. Combustion box 2 from suction port 4
Go to A part of the gas flows through the exhaust guide 41 from the exhaust hole 40 in the earthen wall of the heating chamber 1, passes through the exhaust cover, and is discharged to the outside. The high-temperature hot air blown into the heating chamber 1 from the middle air outlet 6b spreads horizontally over the bottom surface of the upper tray 6a and the surface above the heated object 7 of the lower tray 6b, and flows horizontally to the front door 1.
This corresponds to 2. The hot air hitting the door 12 above is circulated by the circulation fan 1.
1, the water flows through the space between the upper tray 6a and the lower tray 6b, passes through the center of the bottom of the upper tray 6a and the center of the lower tray 6b, and passes through the suction provided on the partition plate 3. Mouth 4
Proceed to combustion box 2. The high-temperature hot air blown into the heating chamber 1 from the lower air outlet 6C flows between the bottom surface of the lower tray 6b and the bottom wall of the heating chamber 1 and hits the door 12. Door 12 above
Since the hot air that hits the is sucked by the circulation fan 11, it flows between the bottom of the lower saucer 6b and the bottom wall of the heating chamber 1, passes through the center of the bottom of the lower saucer 6b, and passes through the center of the bottom of the lower saucer 6b. It flows through the space between the rear part of the engine and the partition plate 3, and passes through the suction port 4 provided in the partition plate 3 to the combustion box 2.

A part of it merges with the hot air blown out from the middle air outlet 5b, flows between the upper tray 6a and the lower tray 6b, and flows through the circulation fan 1.
1 and reaches the combustion box 2 through the suction port 4.

The high-temperature hot air that has just been blown into the heating chamber 1 from the air outlet 6 is sucked into the suction port 4 on the surface above the object to be heated 7 as shown in Figures 3 to 6, so that the hot air flows in the horizontal direction. Therefore, the high-temperature hot air does not strongly hit the object 7 to be heated, and the hot air also flows through the center of the saucer 6. In addition, as the hot air moves away from the outlet 6, it gradually spreads in the vertical direction, mixes with the hot air in the heating chamber 1, and becomes soft hot air on the dish towel of the object to be heated, which makes the object to be heated 7 have a uniform arc. The heated air flows toward the suction port 4 provided approximately at the center of the partition plate 3 while being heated in a wrapping manner. Further, the high-temperature hot air blown out from the outlet 6 flows along the bottom surface of the saucer 6. Since the saucer 6 is made of gold, it has good heat conduction, which promotes uniformity of the temperature of the saucer 6 and allows for uneven heating of the food.

As is clear from the above description, the air outlet 5 is divided into three parts, right and left, and the upper air outlet 6a is positioned higher than the upper surface of the flange of the upper tray 6a. Further, the position of the middle air outlet 5b is set below the bottom surface of the upper tray 6a and higher than the upper surface of the flange of the lower tray 6b. Furthermore, by setting the position of the lower air outlet 6C lower than the end face of the seven lunges of the lower tray 6b, the high temperature hot air blown from the air outlet 6 does not directly hit the object 7 to be heated, thereby drying the object 7. The heat distribution between the periphery and the center is made uniform, allowing for even cooking without uneven heating.

Although the above description has been made regarding a gas heating cooker equipped with a high frequency heating device, it goes without saying that the same applies to those without a high frequency heating device or to electric heating cookers.

As described above, according to the present invention, the hot air is supplied from the combustion chamber to the heating chamber through the three divided blow-off ports: upper, middle, and lower, so that the distribution of hot air within the heating chamber can be made uniform. . In addition, even when cooking in two upper and lower stages, by optimizing the relative position of the air outlet divided into three parts relative to the top and bottom surfaces of the tray for the objects to be heated, hot air can be delivered to the objects to be heated in the two upper and lower stages. By avoiding direct contact, it is possible to perform cooking with good heat distribution and less uneven heating.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a longitudinal sectional view of a conventional heating cooker, Fig. 2 is a front sectional view thereof, and Fig. 3 is a longitudinal sectional view of a heating cooker showing an embodiment of the present invention. , FIG. 4 is a front sectional view of the same, and FIG. 6 is a top sectional view of the same. 1... Heating chamber, 2... Combustion box (combustion chamber), 3 mmam@partition plate, 4 sa**a* suction port, 5 (5a, 5b. 5 () *ma ″-*Air outlet, 6 ((5a, 5b)
@@@11@@Saucer, 11...Circulation fan (
fan device), 17...Rotating mounting table. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 281 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A heating chamber for storing an object to be heated, a saucer for placing the object to be heated, a combustion chamber connected to the heating chamber via a partition plate, and a heating chamber provided in the combustion chamber. and a fan device that circulates hot air in the combustion chamber between the heating chamber and the combustion chamber, and a suction port is provided approximately at the center of the partition plate;
A heating cooker having a structure in which a blower outlet consisting of a large number of openings is provided on the left and right peripheral parts, and the outlet is divided into three parts: an upper outlet, a middle outlet, and a lower outlet. . 2. A heating chamber that stores objects to be heated in two upper and lower stages, a saucer that places the objects to be heated in each of the upper and lower stages, a combustion chamber that is connected to the heating chamber via a partition plate, and a combustion chamber that is connected to the heating chamber through a partition plate. and a fan device for circulating the hot air in the combustion chamber between the heating chamber and the combustion chamber, and a suction port is provided approximately at the center of the partition plate, and a number of suction ports are provided at the left and right peripheral portions. The upper air outlet is set higher than the upper surface of the upper saucer, and the middle air outlet is placed above the upper tray. A heating cooker having a structure in which the lower surface is lower than the upper surface of the lower saucer, and the lower air outlet is provided at a position lower than the lower surface of the lower saucer.