JPS62268918A - Hot air circulating type cooker - Google Patents

Abstract

PURPOSE:To enable a food placed on a lower shelf to be cooked through uniform heating, by providing a side wall of a heating chamber with a duct for communication between a space on the lower side of the lower shelf in the heating chamber and a space between an upper shelf and the lower shelf. CONSTITUTION:When cooking a large amount of foodstuffs 17... by an oven operation, two shelves 8, 8 with the foodstuffs 17... placed thereon are set respectively on upper and lower shelf rests 7, 7, and a fan motor 12 and upper and lower heaters 5, 6 are energized. Air in a heating chamber 12 is sucked into a casing 9 through a suction port 3 by a hot air circulating fan 11, is blown off from blow-off ports 4, 4 toward the heaters 5, 6, and is made to flow on the upper side of the upper shelf 8 and the lower side of the lower shelf 8 to the side of a door 16. The surface of the foodstuffs 17... is directly heated, and the shelves 8 are heated, thereby indirectly heating the rear of the foodstuffs 17.... The heat accumulated in a space A is conveyed through suction ports 14, 14 and ducts 13, 13, and is supplied into a space B through exhaust ports 15, 15 to heat the surface of the foodstuffs 17... placed on the lower shelf 8. Accordingly, both the surface and rear of the foodstuffs can be uniformly heated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a hot air circulation type cooking device that heats food by circulating hot air within a heating chamber.

(Prior art) In a hot air circulation type microwave oven (cooking device), a casing is provided on the outer surface of the rear wall of the heating chamber, and a hot air circulation fan made of a centrifugal fan is installed inside the casing to circulate hot air within the heating chamber. There is something like this.

Specifically, for example, in addition to providing heaters at the upper and lower portions of the heating chamber, an inlet is provided at the center of the rear wall of the heating chamber, and air outlets are provided at upper and lower positions sandwiching the inlet.

Then, attach the casing to the outer surface of the rear wall of the heating chamber,
A fan chamber is formed in which the suction port and the blowout port communicate with each other, and a 39-digit hot air circulation fan is placed in this fan chamber facing the suction port. When activated, the air in the heating chamber is sucked in through the suction port, and the air is blown out from each outlet to each heater, turning it into hot air and sending it into the heating chamber.

By the way, some of these microwave ovens are capable of cooking multiple items at once. For this purpose, a structure is used in which a support is formed on the peripheral wall of the heating chamber 2, and this shelf support is used to provide two tiers of rectangular shelves inside the heating dormitory. However, unlike heating using a round rotating plate, it is difficult to evenly apply hot air to the food with these two-tiered dishes (because it is difficult to rotate the rectangular shelves).

Therefore, in the past, it was decided that a shelf should be placed between the air inlet and the air outlet of each upper and lower tier. Hot air is circulated by exhausting the air to the space below the shelf.

However, this structure has the disadvantage that the hot air cannot be efficiently sent between the shelves because the blown hot air is received by a door provided at the front of the heating chamber and changes its direction. In particular, this is due to the fact that the distance between the shelf and the door cannot be sufficiently wide.

(Problem to be solved by the invention) For this reason, the front and back sides of food items placed on the upper shelf are
Although the hot air that touches the food and the shelf directly will result in the same dark color, food placed on the lower shelf receives less heat directly above the food (because the heat is trapped in the lower part of the shelf). The front side of the food was lighter in color when baked than the back side (heated directly from the shelf).

This invention was made in view of these problems, and its purpose is to provide a hot air circulation type cooker that can cook food placed on the lower shelf without uneven heating. It is in.

[Structure 1 of the Invention (Means and Effects for Solving Problems) This invention provides a space A below the upper shelf 8 in the heating chamber 2, and a space A on the side wall of the heating chamber 2, and a space A on the side wall of the heating chamber 2, and By providing a duct 13 that communicates with the space B on the middle side surrounded by Gives a great amount of heat.

(Example) The present invention will be described below based on an example shown in FIGS. 1 and 2. Figure 1 shows a front cross section of a hot air circulation oven (cooking device), and Figure 2 shows a side cross section. 1 is a cabinet (main body), 2 is a heating chamber provided in the cabinet 1, and 3 is a side cross section. 4 is a suction port consisting of a group of punched holes provided in the center of the rear wall of the heating chamber 2; 4 is a strip-shaped outlet consisting of punched holes provided at equal upper and lower positions of the rear wall sandwiching the suction port 3; 5; 6 is an upper heater provided on the ceiling surface of the heating chamber 2, and 6 is a lower heater provided on the bottom surface of the heating chamber 2. In addition, a pair of shelf supports 7, 7 are provided at each of the upper, middle and lower tiers of the peripheral wall in the width direction in the heating chamber 2. It is possible to arrange them in stages. The suction port 3 is located between the upper and lower shelf supports 7, 7, and also between the upper support 7 and the upper heater 5, and roughly between the lower support 7 and the lower heater 6. The above-mentioned air outlet 4 is opened respectively, and air is taken in from between the shelves 8 and 8 with t tl at the top and bottom, and air is blown out from the top and bottom of the same < tlf 18.8 toward the respective upper and lower heaters 5 and 6. The structure is such that it is possible to

On the other hand, 9 is a casing attached to the outer surface of the rear wall of the heating chamber 2. By installing this casing 9, a fan chamber 10 is formed between the rear wall and the casing 9, in which the suction port 3 and the blowout port 4.4 communicate with each other. Further, a hot air circulation fan 11 made of a centrifugal fan is disposed in the fan chamber 1o, facing the suction port 3. The hot air circulation fan 11 is connected to the rotating shaft of a fan motor 12 provided between the casing 9 and the rear wall of the cabinet 1, and is energized to the fan motor 12 and the upper and lower heaters 5 and 6. In addition to driving the hot air circulation fan 11, the upper and lower heaters 5 and 6 are operated to generate heat, thereby making it possible to circulate hot air into the heating chamber 2.

On the other hand, ducts 13 are attached to the outer surfaces of the left and right peripheral walls of the heating chamber 2, respectively. The ducts 13 and 13 are all installed (pulled) from the middle stage to the bottom stage.
The lower end opening of the duct 13 is connected to the strip-shaped intake port 14 (consisting of punched holes) provided on the lower side of the lower shelf 8 on the peripheral wall, and the upper end opening of the duct 13 is connected on the peripheral wall to the upper shelf 8 and the lower shelf. It is connected to a substantially strip-shaped exhaust port 15 (consisting of punched holes) provided between the shelves 8 of
, 8 into the space between the heating chambers.

Note that 16 opens and closes the opening of the heating chamber 2, which is pivotably mounted on the front side of the cabinet 1! It is the ζth door.

Therefore, when using the hot air circulation oven configured in this manner to cook food items 17 on a winter day in the oven, the two shelves 8,
Set 8 to each bark plate 7.7 in the upper and lower rows. Next, after closing the door 16, the user operates the operating section (not shown). This causes the fan motor 12. Upper side/
The lower heater 5°6 is energized. As a result, the air in the heating chamber 2 is sucked into the casing 9 from the suction port 3 by the hot air circulation fan 11, and the air from each upper side
The air is blown out to the lower heater 5.6. In other words, it becomes hot air and is sent into the heating chamber 2.

The hot air from each outlet 4.4 flows toward the door 16 through the upper part of the upper shelf 8 and the lower part of the lower shelf. At this time, the food 1 on the shelf 8 is heated by the hot air sent to the upper part of the upper tII 8 or by the heat from the upper heater 5.
At the same time as directly heating the surface side of 7..., tll18
Also, the back side of the food 17 is indirectly heated. In other words, the food 17... is heated evenly on both the front and back sides.

On the other hand, the lower shelf 8 is heated by the hot air sent to the lower side of the lower shelf tI]8. Next, the hot air hits the door 16 and tries to be sent between the shelves 8, 8, but because the distance between the shelf 8 and the door 16 is not sufficient, it is not sent to the upper part of the lower shelf 8. occurs.

As a result, heat is trapped below the lower shelf 8, and the heat is
The back side of the food items 17 may be heated excessively through the shelf 8.

In other words, the back side of the food 17... tends to be browned darker than the front side.

However, the heat trapped in the space A, together with the buoyancy of the air, is absorbed by the intake ports 14, 14 on both sides. It is sent through each duct 13° 13 and from each exhaust port 15.15 to the space B1, that is, the upper part of the lower shelf 8. Along with the hot air from the upper shelf 8 sent into the space B, the food 17 on the lower shelf 8 is
Heat the front side of... As a result, the lower 7IP
It can be seen that sufficient heat can be given to food 17... on ls.

Therefore, the front and back sides of the food 17 on the lower shelf can be heated evenly, and both the food 17 on the upper and lower shelves can be cooked evenly.

In the above-mentioned embodiment, the present invention was applied to a hot air circulation type cooker with a heater installed in the heating chamber, but other types of cooking devices, such as those with a heater inside the casing, may also be used in addition to the heater. This can be applied to devices that use hot air to cook food on two shelves, such as those that have heaters installed in the city.

[Effects of the Invention] As explained above, according to the present invention, the heat accumulated below the lower shelf can be guided between m using the duct, and a sufficient heat wave can be applied to the food on the lower shelf. Become.

As a result, food can be heated evenly on both sides.
Foods on the lower shelf can be cooked without uneven heating.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a hot air circulation type cooking device according to an embodiment of the present invention, and FIG. 2 is a side sectional view thereof. 2...Heating chamber, 3...Suction port, 4...Blowout port, 5
゜6...Upper heater, lower heater (heater), 8...
・Town, 11...Hot air circulation fan, 13...Duct,
14...Intake port, 15...Exhaust port, 16...Door,
17...Food.

Claims (1)

[Claims] A suction port that opens between the upper and lower shelves is provided on one side wall of the heating chamber, which has a door on the front and can freely accommodate two upper and lower shelves. Each has an air outlet opening into a space below the air inlet,
In a hot air circulation type cooker configured to circulate hot air into a heating chamber through an air outlet, a side wall of the heating chamber is surrounded by a space below the lower shelf in the heating chamber and each of the upper and lower shelves. A hot air circulation type cooking device characterized by being provided with a duct that communicates with an intermediate space.