JPS5886329A - Heat cooker - Google Patents

Abstract

PURPOSE:To enable to cook by heating to the center of the thickness of a material to be cooked, even if said material to be cooked is considerably thick, by directly striking the material to be cooked with hot air by a structure wherein the hot air is rendered to be blown-off to the central position of a heating chamber in the hot air circulating type heat cooker. CONSTITUTION:The hot air heated at a heater 8 is blown-off from blowoff holes 14 provided at the center of a partition plate 5 to the center of the heating chamber 1 by means of an axial fan 6 and then the hot air in the heating chamber 1 is sucked from suction holes 15 provided in the partition plate 5 at its periphery adjacent to the side wall of the heating chamber 1 so as to forcibly circulate the hot air. In such a manner as mentioned above, the circulating hot air directly hits against the material to be cooked, resulting in enabling to heat the center of the material to be cooked with high temperature hot air with no heat being absorbed to the wall of the heating chamber 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called hot air circulation type heating cooker that heats an object to be heated by increasing the temperature in a heating chamber using hot air.

Conventionally, most of this type of heating cooker uses a centrifugal fan to blow hot air from around the side wall of the heating chamber and suck it in from the center, as shown in FIG.

To explain its structure, 1 is a heating chamber that stores the object to be heated 2, 3 is a door provided at the opening of the heating chamber 1 so that it can be opened and closed freely, and 4 is formed by a partition plate 6 provided in the heating chamber 1. This compartment 4 is provided with a heater 8 such as a sheathed heater, and a centrifugal fan 21 for circulating air within the heating chamber 1 and compartment 4. A motor 9 drives the centrifugal fan 21, and is driven by a belt 1o. 11 is the outer box of the heating cooker.

When heating an object to be heated in such a configuration, when the object to be heated 2 is placed in the heating chamber 1 and the power is turned on by an external operation, a voltage is applied to the motor 9 and the heater 8, and the centrifugal fan 21 starts rotating, and the heater 8 starts generating heat. On the other hand, as the centrifugal fan 210 rotates, the air near the rotary blade of the centrifugal fan 21 is compressed and blown onto the heater 8. The air blown to the heating device 8 absorbs heat from the heating device 8 and becomes hot air, which flows into the heating chamber 1 from the air outlet 14 provided in the partition plate 5 in the heating chamber 1 near the side wall of the heating chamber.
It is blown inward like an arrow. A part of the hot air blown into the heating chamber 1 directly hits the object to be heated 2 and heats the object to be heated 2, and the remaining hot air flows along the side wall of the heating chamber as shown by the arrow in the figure and closes the door 3. The object 2 to be heated is heated by changing the direction near the inner surface, and the object 2 is heated through the suction port 16 provided in the middle part of the partition plate 5 to the compartment 4.
The hot air circulates as it is sucked in and blown onto the heater 8 again, and the object 2 to be heated is cooked by this hot air. The temperature in the heating chamber 1 is set depending on the type of the object to be heated 2, and is controlled by a temperature detection element or the like.

The above is a conventional example of a heating cooker, but such a heating cooker has the following drawbacks.

The air is heated by the uncircumcised heater 8, and the centrifugal fan 21
A part of the hot air blown into the heating chamber 1 directly hits the heated object 2.
However, since most of the hot air flows along the side wall of the heating chamber and then heats the object 2 to be heated, heat is removed by the side wall of the heating chamber before it hits the object 2. This means that heating efficiency deteriorates.

In terms of cooking performance, for example, when cooking a thick object to be heated such as a sponge cake, the area around the object to be heated 2 will be partially hit by the hot air just blown from the compartment 4. Since the central part of the object to be heated 2 is cooked with hot air whose temperature has been lowered by removing heat from the walls of the heating chamber, etc., the degree of heating in the central part is lower than in the peripheral parts, resulting in unevenness on the surface of the sponge cake. It ends up.

When cooking with hot air in this way, heating progresses through heat conduction from the surface of the object to be heated 2 to the inside, so the center of the object to be heated 2 is the least likely to be heated, but the center of the heating chamber This tendency becomes even stronger when the hot air temperature is low, making it difficult to achieve good cooking performance.

The present invention includes a heating chamber for storing an object to be heated, a compartment provided in the heating chamber and formed of a partition plate having an inlet near the side wall of the heating chamber and an outlet in the center of the heating chamber; The heater is provided indoors and includes a heater that increases the temperature in the heating chamber, an axial fan that circulates air in the heating chamber and the compartment, and a duct provided around the axial fan, and The hot air heated by the heater is blown out to the center of the heating chamber by the axial fan from the outlet provided on the partition plate to heat the object to be heated, and the hot air that heated the object is transferred to the partition plate. By adopting a structure in which suction is drawn into the compartment from a suction port provided in the compartment, the above-mentioned conventional drawbacks are solved.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

Note that the same members as in the conventional example will be described with the same reference numerals.

In FIGS. 1 and 2, 1 is a heating chamber that houses the object to be heated 2, 3 is a door provided at the opening of the heating chamber 1 so that it can be opened and closed freely, and 4 is a partition plate 5 provided inside the heating chamber 1. It is a compartment formed. 6 is an axial fan installed in the compartment 4;
Reference numeral 7 denotes a duct provided around the axial flow fan 6, and a heating chamber 8 which also serves as a stationary blade is provided within this duct γ. 9
is a motor that drives the axial fan 6, and the rotation of the motor 9 is transmitted to the axial fan 6 via the belt 1o.

11 is the outer box of the heating cooker.

FIG. 3 shows a heater 8 which also serves as a stationary vane, and this heater 8 is configured in a plate shape and is provided within the duct 7.

Figure 4 shows the flow of wind inside the duct T, where the wind speed in the rotational direction generated by the axial fan 6 is converted into a flow in the axial direction by the rectifying action of the heater 8, which also serves as a stationary blade. Wind pressure in the axial direction can be increased.

5 to 7 show other embodiments of the heater 8 which also serves as a stationary blade, and FIG. 5 shows a heating element 13 attached to a radial plate-shaped stationary blade 12 with excellent thermal conductivity. It was overwhelming.

FIG. 6 shows a state in which the heating element 13 is attached to the plate-shaped stator vane 12 and is also sandwiched therein.

FIG. 7 shows a state in which a coil-shaped or ribbon-shaped heating element 13 is wound around a non-metallic, plate-shaped stationary blade 12.

In such a configuration, when the power is turned on by an external operation, the heater 8 starts generating heat and the axial fan 6 starts rotating via the belt 10 due to the rotation of the motor 9.

This axial flow fan 6 can create wind in the axial direction, but if it is used alone, the velocity of the wind in the rotation direction remains, so the wind pressure in the axial direction is weak, so it is necessary to install it in the center of the partition plate 6. Hot air cannot be circulated through the blow-off port 14 and the suction port 16 provided in the partition plate 5 near the side wall of the heating chamber. Therefore, in this embodiment, a duct 7 is provided around the axial fan 6, and a l heater 8 which also serves as a stationary blade is provided within the duct 7 to change the minute speed in the rotational direction of the axial fan 6 to the wind speed in the axial direction. By converting it into
4 to the center of the heating chamber 1'.

The hot air blown into the heating chamber 1 directly hits the object to be heated 2 and heats the object to be heated 2, as shown in FIG.
They change directions separately near the inner surface of the door 3 and flow along the side wall of the heating chamber, and are each sucked into the compartment 4 through the suction port 16. The air sucked into the compartment 4 is heated again by the heater 8, pressurized again by the axial fan 6, and blown into the heating chamber 1. Hot air circulates between the two, and the object to be heated 2 can be heated efficiently.

In this embodiment, the heater 8 is formed into a planar shape, and is located closest to the heating chamber 1 and inside the duct 7, so that the contact surface with air can be increased. There is no diffusion heat, and the hot air heated by the heater 8 can be used efficiently.

In this embodiment, the heater 8, which also serves as a stationary blade, is provided in front of the axial fan 6, but the same effect can be obtained even if it is provided in the rear of the axial fan 6.

As is clear from the above description, the heating cooker of the present invention is
The hot air heated by the heater is blown out into the center of the heating chamber by an axial fan from the outlet provided in the center of the partition plate, and the hot air is sucked into the compartment from the inlet provided around the side wall of the heating chamber of the partition plate. With this structure, the hot air heated by the heater directly hits the object to be heated, so the center of the object to be heated can be heated with high-temperature hot air without heat being taken away by the walls of the heating chamber. In particular, the cooking device is capable of efficiently and satisfactorily cooking even a large and thick object to be heated, right down to the center.

[Brief Description of the Drawings] Fig. 1 is a plan sectional view of a heating cooker showing an embodiment of the present invention, Fig. 2 is a front sectional view of Fig. 1, and Fig. 3 is a cross-sectional view of the heating device and duct. Perspective view showing the configuration, 41st, Heating chamber, 4, Compartment, 6, Axial fan, 00060. Duct, 8, Heater,
140 10019. Air outlet, 15... Inlet 〇 Name of agent Patent attorney Toshio Nakao Haga 1 person Figure 3 q / Figure 5 Figure 4 Figure 6

Claims (2)

[Claims] (1) A heating chamber that stores the object to be heated; a compartment provided within the heating chamber formed by a partition plate having an inlet near the side wall of the heating chamber and an outlet in the center; a heater that is installed in the heating chamber and increases the temperature within the heating chamber;
Consisting of an axial fan that circulates air in the heating chamber and the compartment, and a duct provided around the axial fan, hot air heated by the heater is sent to an outlet provided in the partition plate. The cooking device is configured such that hot air is blown from the axial fan to the central part of the heating chamber to heat the object to be heated, and the hot air that heated the object to be heated is sucked into the compartment from a suction port provided in the partition plate. . (2) A claim in which the axial fan and the heater are provided in series in the duct, and the heater has a plate-like shape and is installed so that its plane part is parallel to the duct. The heating cooker according to item 1.