KR101207641B1 - Heating cooker - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker, comprising a hot air circulation unit (12) outside the furnace of the inner wall (2e) of the heater (2), and installed so as to be convex inside the furnace under the inner wall (2e). A duct forming member having a lower end outlet 7 (first vent) in the convex portion 11 and having a vent 23 (second vent) between the inner wall 2e and the hot air casing 13. 20 is provided, a ventilation space 21 is formed between the convex portion 11 and the duct forming member 20, and heated by the hot air heater 16 by the blowing action of the hot air fan 15. Air is supplied as hot air from the hot air generating chamber 17 into the heating chamber 2 through the air vent 23, the ventilation space 21, and the lower air outlet 7 in order, so that the hot air can be supplied evenly in the heating chamber. And it is characterized by providing a heating cooker which can suppress the heating imbalance of the food by making the heating distribution uniform.

Description

Heat Cooker {HEATING COOKER}

The present invention relates to a heat cooker for performing a so-called oven cooking for heating food by hot air.

Conventionally, in a heating cooker, oven cooking is possible for foods accommodated in a heating chamber, and heating cooking means by microwaves (high frequency) using a magnetron as a heating source, or an electric heater as a heating source, for example. It is adopted with other heating means, such as grill cooking means by radiant heat, and is widely used in general households.

As a heating source for oven cooking in this heating cooker, for example, a known hot air circulation unit in which a hot air heater and a hot air fan is installed in a hot air casing provided on the outer side of the inner wall of the peripheral wall forming the heater is used. have.

The hot air circulation unit is configured to generate hot air in the hot air casing by the action of the hot air heater and the hot air fan, and to circulate the hot air in the heating chamber.

Here, circulating the hot air generated by the hot air circulation unit without remaining in the entire heating chamber is an important problem in carrying out oven cooking. That is, when there exists a square part etc. which hot air does not flow easily in a heating furnace, there exists a possibility that the heating imbalance with respect to food may arise. Therefore, conventionally, the annular hot air heater is arranged on the outer circumferential portion of the hot air fan to obtain hot air evenly heated.

In addition, when cooking in a heating oven using a cooking dish on which food is placed, the cooking action of the hot air in the heating chamber is disturbed by the cooking dish, making it difficult to obtain a uniform heating state of the food.

Therefore, what provided the hole part which let a hot air pass only in the front part of the periphery in the cooking pan (plate) accommodated in a heating furnace (for example, refer patent document 1).

Further, proposals have been made to provide a louver for changing the direction of the hot air blown out into the furnace, or to install a wind direction variable part which is inclined with respect to the air outlet so that hot air can be blown out to the corner in a required direction (for example, See Patent Document 2).

Japanese Laid-Open Patent Publication No. 2002-243157 Japanese Laid-Open Patent Publication No. 2005-300109

However, the hot air flow generated by the hot air fan flows in the circumferential direction along the rotational direction of the fan, and the so-called directional direction is given. For this reason, even the hot air generated almost uniformly in the circumference in the hot air casing is taken out from the hot air casing in the inclined direction in the circumferential direction in the furnace.

In addition, since the inside of the furnace usually forms a rectangular box-shaped quadrangle, the hot air flows toward each wall at different angles become unbalanced or it is difficult for the wind to flow in the rear side of the hot air flow linearly in one direction. As a result, blind spots are generated, resulting in heating imbalance, making it difficult to obtain uniform heating of the food.

Therefore, in the structure described in Patent Document 1, only the front part of the plate allows the flow of the hot air, and it is still possible to obtain the hot air flow to eliminate the heat imbalance by eliminating the directionality of the circumferential direction by the hot air fan, which is a fundamental factor of the heat imbalance. It is difficult.

Moreover, according to the structure which provided the wind direction variable part of patent document 2, the direction change according to the inclination angle of the wind direction variable part is possible, and it is thought that it is possible to send sufficient hot wind in the same direction.

However, even in this case, the directionality of the circumferential direction by the hot wind fan, which is a fundamental factor of the heating imbalance, is not solved. Therefore, the hot air that reaches the wind direction variable part becomes a hot wind flow with a new linear directionality, although it is useful to send in a predetermined direction. It is still difficult to obtain a hot air stream that eliminates heating imbalance by supplying uniform hot air in the island.

The present invention has been made to solve the above problems, an object of the present invention is to provide a heating cooker which can supply hot air evenly in the heating chamber, and can evenly improve the heating imbalance of food by uniformizing the heating distribution. . Another object of the present invention is to include a cooking dish disposed in a heating chamber, and to provide a heating cooker capable of uniformly supplying hot air into the heating chamber, and uniformly distributing the heating to suppress heating imbalance of food. Is in.

In order to achieve the above object, the heat cooker of the present invention includes a heater for accommodating food, a first ventilation part including a plurality of transmission holes provided in a wall forming the heater, and heating of the wall on which the first ventilation part is formed. A hot air casing disposed outside the hot air casing to form a hot air generating chamber ventilated with the inside of the heating chamber through the first ventilation unit, a hot air heater for heating air in the hot air generating chamber, and a fan motor in the hot air generating chamber. A hot air fan installed to be rotationally driven by the air blower, and a ventilation duct covering at least a portion of the first air vent, and forming a ventilation space between the wall provided with the first air vent, and generated in the hot air casing. It is characterized in that it is configured to supply hot air into the heater through the ventilation duct.

In addition, it is characterized in that the hot air supplied through the ventilation duct is circulated through the ventilation space path provided at a position opposite to the ventilation duct of the cooking dish disposed in the heater.

According to the said means, the hot air blown into the ventilation space from the hot wind generating chamber in a hot air casing will be in the state where the intensity | strength is loosened in the said ventilation space, and it will become easy to lose directionality. Then, the hot air blown out of the heating chamber from the first ventilation is uniformly supplied into the heating chamber in a rectified state, thereby making it possible to effectively eliminate the heating imbalance of the food by making the heating distribution uniform.

In addition, by interposing a ventilation duct between the flow of hot air from the hot air circulation unit to the heating furnace, the hot air is good in the entire heating chamber by using a ventilation space path composed of holes or cutouts of the cooking dish facing the ventilation duct in the heating furnace. Can be recycled.

In this way, the hot air blown out of the heating chamber mainly by the positive pressure is uniformly supplied from the ventilation duct toward the hole portion or the cutout side of the cooking dish facing the same, and forms a flow circulating through the hole portion or the cutout. can do. Therefore, it is possible to prevent the bias of the hot air flow in the furnace and to effectively eliminate the heating imbalance of the hot air flow food.

1 is a front view showing a first embodiment of the present invention in a state where a door of a heating cooker is removed;
2 is a longitudinal side view schematically showing the overall configuration;
3 is a perspective view of a main part in the furnace,
4 is a cross-sectional view taken along the line X1-X1 of FIG. 3;
5 is an enlarged longitudinal sectional side view of a main part;
6 is a plan view of a cooking plate,
7 is a cross-sectional plan view showing a cooking plate placed in a heating oven;
8 is a view showing the temperature change of the space part of the upper and lower three stages in the heating chamber of the conventional product A;
9 is a view equivalent to FIG. 8 for product (B) of the present invention;
(A) and (b) is a diagram showing the temperature distribution of the cooking dish on the upper end of the conventional product (A) and its measured value,
(A) and (b) is a diagram showing the temperature distribution of the cooking dish at the bottom of the conventional product (A) and its measured value,
12 is a view corresponding to FIG. 10 of the cooking plate at the top of the product (B) of the present invention;
13 is a view corresponding to FIG. 10 of the cooking plate at the bottom of the product (B) of the present invention;
FIG. 14 is a view illustrating divisions of respective temperature ranges of a cooking dish, and reference numerals corresponding thereto; FIG.
FIG. 15 is a view corresponding to FIG. 5 showing a second embodiment of the present invention; FIG.
16 is a diagram corresponding to FIG. 4 showing a third embodiment of the present invention;
FIG. 17 shows a fourth embodiment of the present invention, and is a front view of the heated cooker with the door removed,
18 is a view corresponding to FIG. 4,
19 is a view corresponding to FIG. 7,
20 is a diagram corresponding to FIG. 9 for the article C of the present invention;
Fig. 21 is a view corresponding to Fig. 12 of the cooking dish at the top of the product C of the present invention;
Fig. 22 is a view corresponding to Fig. 13 of the cooking dish at the bottom of product C of the present invention;
23 is a plan view of a cooking dish showing a fifth embodiment of the present invention and
24 is a diagram corresponding to FIG. 1 showing a conventional example.

(Mode for carrying out the invention)

<1st embodiment>

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of this invention is described, referring FIGS. 1-7.

First, the schematic configuration of the entire heating cooker will be described. In Fig. 1 and Fig. 2, the housing body 1 forming the outline of the heating cooker has a rectangular box shape, and a heater 2 having an open front face is provided therein. The door 3 (refer FIG. 2) which opens and closes the front opening part is provided in the front part of the heater 2 so that rotation is possible.

The circumferential wall surface which forms the heating chamber 2 is comprised from the ceiling wall 2a, the bottom wall 2b, the left wall 2c, the right wall 2d, and the inner wall 2e. In each of these peripheral walls 2a to 2e, the ceiling wall 2a forms a "fish cake shape" from the front, and the inside of the heating chamber is concave (heated and convex outward), and as an arc-shaped non-planar portion. Consists of.

As shown in FIG. 1, the inner wall 2e is formed with the some through-hole 10 which consists of a punching hole. In detail, the inner wall 2e includes an upper end outlet 5 formed on the left and right sides of the upper portion thereof, a stop outlet 6 formed on the left and right sides of the middle portion in the vertical direction, and a lower end outlet 7 formed on the lower portion thereof. And an intake port (intake hole) 8 formed therein.

These upper end outlets 5, the interruption outlet 6, the lower outlet 7, and the inlet 8 are all a plurality of penetrating holes 10, other than the penetrating hole 10 provided in the inlet 8, that is, the upper end. The permeation hole 10 provided in the blowout outlet 5, the interruption | elimination blowout opening 6, and the lower blowout outlet 7 corresponds to the 1st ventilation part of this invention.

As shown in FIGS. 3 and 4, a portion of the lower outlet 7 formed in the lower portion of the inner wall 2e is toward the inside of the heating chamber 2 (inside the heating chamber), in this case, so as to be convex forward. The convex part 11 is integrally formed. The convex portion 11 extends in the left and right direction and forms a trapezoidal shape in which the front side is narrowed from the side (see FIG. 5), and has a lower outlet port (a) at the front portion 11a of the convex portion 11. The transmission hole 10 of 7) is formed.

That is, the permeation hole 10 of the lower end ejection opening 7 is not formed in the upper surface part 11b and the lower surface part 11c of the convex part 11, but is substantially in the left-right direction of the front part 11a. It is formed over.

In addition, among each circumferential wall 2a-2e which forms the heating chamber 2, except for the convex part 11 of the ceiling wall 2a and the inner wall 2e, all form flat surface shape, ), The entire surface of the circumferential walls 2a to 2e may be formed in a flat surface shape to form a rectangular box-shaped furnace.

The hot air circulation unit 12 is provided on the outer side of the furnace (distribution) of the inner wall 2e of the furnace 2. As illustrated in FIG. 2, the hot air circulation unit 12 includes a hot air casing 13 provided on the rear surface of the inner wall 2e, and a hot air fan disposed in the hot air casing 13 and driven to rotate with the fan motor 14. 15) and a frame-shaped hot air heater 16 arranged around the outer circumference of the hot air fan 15.

The hot air casing 13 is provided to cover each of the outlets 5, 6, 7 and the suction port 8 formed on the inner wall 2e from the rear, and forms a hot air generating chamber 17 between the inner walls 2e. have.

The hot air generating chamber 17 can be ventilated with the inside of the heating chamber 2 through each of the outlets 5, 6, 7 and the inlet 8, and the hot air fan 15 and the hot air generating chamber 17 can be vented. The hot air heater 16 is arrange | positioned.

On the rear surface of the inner wall 2e, especially the rear surface of the convex portion 11, it is located between the inner wall 2e and the hot air casing 13, and the lower outlet 7 is heated and covered from the outside (rear). The duct forming member 20 is provided.

A ventilation space 21 is formed between the duct forming member 20 and the convex portion 11 formed integrally with the inner wall 2e. The duct forming member 20 is formed in a flat plate shape, and has a vent hole (second ventilation portion) 23 formed by a plurality of transmission holes 22 formed of punching holes in a portion facing the ventilation space 21. have.

The duct forming member 20 and the convex portion 11 constitute the ventilation duct 24 of the present invention. Moreover, what is necessary is just to be comprised so that the duct formation member 20 may form the duct-shaped ventilation space by covering at least one part of the lower stage outlet 7.

In addition, the ventilation opening 23 is not limited to what was formed with the some perforation hole 22, For example, one opening may be sufficient. In addition, it is also possible to divide the duct forming member 20 into a plurality, so as to secure a path for supplying from the hot air casing 13 to the ventilation space 21.

As shown in FIG. 4, the horizontally formed region of the lower outlet 7 (first vent) facing the ventilation space 21 of the ventilation duct 24 has a width in the horizontal direction of the hot air casing 13. It is set larger than this, and the permeation hole 10 of the lower end outlet 7 is formed so that it exists also in the outer side of the hot air casing 13.

As a result, as described later, hot air can be supplied into the heating chamber 2 from a position outside the hot air casing 13. In addition, the duct formation member 20 is set larger than the width | variety size of the left-right direction of the hot air casing 13.

As a result, at least a part of the duct forming member 20 is provided so as to be located outside the hot air casing 13, and the permeation hole 22 of the vent port 23 (second vent part) is formed in the hot air casing 13. It exists only inside.

In the ventilation duct 24 forming the ventilation space 21, the total (sum) S1 of the opening area of the lower end outlet 7 of the convex portion 11 is the ventilation hole 23 of the duct forming member 20. It is made smaller than the sum (sum) (S2) of the opening area of (S1 <S2).

Specifically, for example, the number of the through holes 10 in the lower outlet 7 facing the ventilation space 21 is less than the number of the through holes 22 in the ventilation holes 23 facing the ventilation space 21. The sum total of the opening area of the permeation | transmission hole 10 of the lower end blowout opening 7 toward the space 21 is made smaller than the sum total of the opening area of the permeation hole 22 of the ventilation opening 23 toward the ventilation space 21.

In addition, the group of permeation holes 10 of the lower outlet 7 shown in Figs. 1 and 3 has a central portion as a horizontally arranged perforated hole, and the center portion is provided with a transverse hole arranged in two horizontal rows. The opening area of is made small.

As shown in FIG. 2, the magnetron 28 is provided below the hot air casing 13 in the lower part of the rear part of the outside of the furnace 2 as a heating means for microwave (high frequency) heating. The microwaves from the magnetron 28 are supplied into the furnace 2 through the waveguide 29 provided on the bottom wall 2b of the furnace 2.

In addition, each circumferential wall 2a-2e, the hot air casing 13, the duct forming member 20, etc. which form the above-mentioned heating chamber 2 are the same kind of material, for example, an aluminum plated steel plate (even if it is a stainless steel plate) Good) to prevent electrochemical corrosion (electrochemical corrosion) caused by dissimilar metal bonding.

That is, unlike this embodiment, it is good also as a structure which mounts the ventilation space formation duct in the heating chamber 2. As shown in FIG. In this case, if a small gap occurs in the joint portion between the duct-forming member 20 and the wall of the heater 2, there is a fear that sparks may occur there during microwave heating.

In this embodiment, the duct forming member 20 is arrange | positioned on the outer side of the inner side of the inner wall 2e of the furnace 2, and the inner wall is not attached to the inner wall 2e in the furnace 2, without installing the duct separate from the inner wall 2e. Since the convex part 11 was integrally formed in (2e), and the ventilation duct 24 was comprised, it can prevent that a spark arises at the time of microwave heating using the magnetron 28. As shown in FIG.

Left and right pairs of shelf support parts (plate support parts) 25 and 26 are provided in two upper and lower stages on the left wall 2c and the right wall 2d of the heater 2, and these shelf support parts 25 and 26 are provided. For example, shelves, such as the cooking dish 27 shown in FIG. 6, can be arrange | positioned in two stages up and down.

In the state which arrange | positioned the cooking pan 27 in the upper and lower two stages in the heating chamber 2, the inside of the heating chamber 2 is divided into three spaces of the upper and lower stages by these cooking dishes 27. As shown in FIG. At this time, the upper cooking plate 27 is disposed between the upper outlet 5, the interruption outlet 6, and the suction port 8, and the lower cooking plate 27 is connected to the interruption outlet 6 and the suction port 8. It is arranged between the lower outlet 7.

Even when the cooking dish 27 of the present embodiment is arranged in the furnace 2 as described above, the hole portion (at least) is disposed at a position facing the ventilation duct 24 so as to obtain a good circulation state of the hot air in the entire furnace. 31) is formed. This cooking dish 27 is explained in full detail with reference also to FIG. 6, FIG.

The cooking dish 27 is a metal plate enamel finish, for example, and forms the rectangular square dish shape with a long bottom left and right as a whole. In detail, the circumferential edge portion of the cooking dish 27 forms a short shape by bending, and the flange portion 27c extending outward at an upper end of the circumferential wall 27b (see FIG. 2) of the cooking dish 27. Is installed integrally.

The cooking dish 27 is supported by the shelf support parts 25 and 26 on both left and right sides of the flange part 27c as a shelf at the time of oven cooking, and can be attached and detached easily from the said front opening part with respect to the heater 2. It is supposed to be done. When the cooking dish 27 is formed of aluminum as a metal material, the cooking dish 27 is relatively light and thus has an effect of being easy to handle and excellent in workability.

As shown in FIG. 6, the cooking dish 27 has a shape in which rectangular rectangular corner portions are respectively cut in plan view, and the cut portion of the four corners of the flange portion 27c is 45 relative to the periphery of the cooking dish 27. The inclined corner portion 30 is formed.

Moreover, the flange part 27c is provided with the slit-shaped hole part 31 extended along the periphery of the cooking saucer 27 by arranging a plurality (for example, two) for each side of the cooking saucer 27. . As shown in FIG. 7, the hole 31 has a size shape that is not covered (unshielded) by the shelf supports 25 and 26 even when the cooking dish 27 is supported by the shelf supports 25 and 26. Has

In this cooking dish 27, the end part 31a of the hole part 31 beside the corner part 30 is formed in parallel so that it may follow the corner part 30, and it is the vicinity (circumference | surroundings) of the end part 31a of the hole part 31. It is comprised so that stress concentration may not generate | occur | produce in the edge part).

In addition, there is a connecting portion 32 sandwiching the hole 31 in the longitudinal direction of each side of the cooking dish 27 to set the opening area of the hole 31 in the flange portion 27c as large as possible. The strength of the cooking dish 27 is secured.

In addition, the hole part 31 is formed in predetermined slit width so that a user's finger may not enter, and it can change suitably the size shape of the hole part 31, etc. as mentioned later. In place of the hole 31, a cutout (not shown) in which the outer circumferential side of the flange portion 27c is opened may be provided.

Here, in this embodiment, a slit-shaped hole portion 31 formed around the cooking dish 27 or a cutout portion whose outer circumferential side is replaced instead of the hole portion 31 is collectively referred to as a ventilation space path. .

In addition, as shown in FIG. 6, the bottom wall 27a of the cooking dish 27 is provided with a recess 33 for preventing bending and a display portion 34 for alerting the user.

The concave portion 33 forming a long circular shape in plan view is formed to be slightly recessed at the center of the bottom wall 27a of the cooking dish 27 by, for example, pressing, and prevents warpage caused by temperature change. Has the function to

In addition, since the display part 34 which cannot be used as a stove may generate a spark at the time of cooking by microwave heating depending on the material of the cooking dish 27, the misuse of the cooking dish 27 is eliminated. It is engraved for.

Subsequently, the operation of the above configuration will be described. When the oven is cooked, the user arranges and fixes the cooking dish 27 up and down two stages through the shelf supporting portions 25 and 26 as shown in FIGS. 1 and 2, and on each cooking dish 27. It prepares by putting food before heating cooking which is not shown in figure, and storing it.

In this case, since the holes 31 are formed in the front and rear sides and the left and right sides of the cooking dish 27, the hole 31 is the left wall 2c and the right wall in the heating chamber 2, respectively. 2d, the inner wall 2e, and the inner wall surface of the door 3 are located. Moreover, only one stage may be sufficient as the cooking dish 27 provided only in the shelf support part 26 of a lower end.

Subsequently, the hot air circulation unit 12 is energized and driven based on the cooking start operation by the operation panel (not shown). In this manner, the hot air heater 16 is energized and heated, and the hot air fan 15 is driven to rotate in the direction of the arrow A in FIG. 1 by the fan motor 14.

Among them, the air in the hot air generating chamber 17 is heated by the heat generation of the hot air heater 16. In addition, the heated air in the hot air generating chamber 17 is blown into the heating chamber 2 from the top blowout outlet 5 and the stop blowout outlet 6 as hot air by the blowing action according to the rotation of the hot air fan 15 (FIG. 1 and arrow B1 of FIG. 2).

Then, hot air (see arrow B2 in FIG. 2) blown into the ventilation space 21 from the air vent 23 is blown out of the lower outlet 7 into the heating chamber 2 (white arrows in FIGS. 1 and 2). (C1)), and the air in the heater 2 is sucked into the hot air generating chamber 17 from the suction port 8 in the center (see arrow B3 in FIG. 2) and circulated to be hot-aired again.

This hot air is efficiently circulated and supplied through the outside of the hole portion 31 or the corner portion 30 serving as the ventilation space of the cooking dish 27 in the heater 2 as described later.

In this way, the hot air is circulated and supplied into the heating chamber 2 by the hot air circulation unit 12, and the food accommodated in the heating cabinet 2 is heated and cooked.

Here, the hot air blown directly into the heating chamber 2 from the upper blowout outlet 5 and the stop blower outlet 6 is the rotational direction of the hot air fan 15 (arrow A direction) as indicated by arrow B1 in FIG. 1. It has directionality along the circumferential direction.

The hot air blown out from the upper end outlet 5 in the oblique direction with respect to the ceiling wall 2a becomes a substantially linear flow, but since the ceiling wall 2a of the heater 2 has a curved shape, The following hot air flow occurs.

That is, the arrow D shown by the dashed-dotted line in FIG. 1 shows the still directional hot air flow which was only blown out of the upper outlet 5 into the heating furnace as shown by the solid line arrow B1 to the arcuate ceiling wall 2a. The movement after contacting is schematically illustrated.

The hot air flow indicated by this arrow D flows toward the inside of the furnace in the whole while changing to an annular (or vortex) flow after contacting the curved ceiling wall 2a. The hot air flowing forward flows from the inside of the furnace to the edges of the corners of the furnace through the outside of the plurality of holes 31 and the corners 30 of the upper circumferential edge of the upper cooking dish 27. The stirring effect of the hot air in the furnace is enhanced.

Thereby, uniformity of heating distribution can be promoted and it can be expected to eliminate the heating imbalance of food. In addition, the hot air flow in the direction of the arrow D indicates a tendency of a large hot air flow to the whole inside of the furnace even when a shelf such as the cooking dish 27 is not provided in the furnace (not shown).

On the other hand, the hot air blown out from the lower outlet 7 through the ventilation duct 24 through the ventilation duct 24 into the heating chamber 2 is blown out as follows. That is, the hot air passing through the lower vent 23 is blown into the vent space 21 formed by the vent duct 24 once, as shown by arrow B2 in FIG.

At this time, the hot air flowing out from the plurality of permeation holes 22 of the ventilation holes 23 into the ventilation space 21, which becomes a large space, diffuses therein and the intensity thereof is alleviated, and the ventilation space 21 has a lower outlet port. Since it is a closed space except the permeation | transmission hole group of (7), the hot air blown into the ventilation space 21 is the structure which is hard to blow out directly from the permeation hole 10 with the small diameter of the lower end outlet 7.

In addition, since the permeation hole 10 of the lower outlet 7 is also outside the hot air casing 13, hot air is supplied into the heating chamber 2 from a position outside the hot air casing 13.

In other words, the ventilation space 21 which extends outward from the hot air casing 13 can be provided, and the rectified hot air C1 can be supplied into the heating chamber 2 in a wider range than the hot air casing 13.

Moreover, the total of the opening area of the permeation | transmission hole 10 of the lower stage blowout opening 7 toward the ventilation space 21 is the permeation | transmission hole 22 of the ventilation hole 23 of the duct forming member 20 which faces the ventilation space 21. By making the structure smaller than the sum total of the opening area of the hot air, the hot air blown into the ventilation space 21 with good intensity from the ventilation port 23 is in a state of staying as if temporarily staying there.

That is, the hot wind blown into the ventilation duct 24 of the closed space from the ventilation opening 23 forms the state where the intensity | strength was alleviated, and it becomes easy to lose the directivity to the circumferential direction by the hot air fan 15 by this. .

And the hot air in this ventilation duct 24 is blown out into the heating chamber from the permeation hole 10 of the lower blower outlet 7 mainly based on the static pressure which rises in the ventilation duct 24 (FIG. 1, double white arrows ( C1)).

In this way, the hot air flow blown out through the ventilation duct 24 in the furnace has almost no directivity in the circumferential direction due to the rotation of the hot air fan 15, and is rectified from the lower outlet 7 into the heater. It is taken out toward the front.

In this case, at the door 3 side facing the front part 11a (refer FIG. 5) of the ventilation duct 24, the hole part 31 and the corner part 30 which become the circulation path of the front edge part of the cooking dish 27 are Since it is provided, the circulation state in which hot air is favorable in the whole heating chamber 2 is obtained.

That is, the hot air blown out from the lower end outlet 7 of the ventilation duct 24 flows evenly toward the opposite surface (door 3) side facing the front part 11a of the ventilation duct 24. The hot air in contact with the door 3 is located immediately near the opposing face, and is heated through the outside of the plurality of holes 31 or corners 30 of the front edge of the cooking dish 27 along the opposing face (2). ) Form a flow that circulates throughout.

In addition, since the ventilation duct 24 is protruded into the inside of the heating furnace which becomes the front of the ventilation duct 24, what is called a short circuit which directly inhales into the suction port 8 through the hole 31 of the rear edge of the cooking dish 27. Is prevented.

Therefore, the ventilation taken out from the ventilation duct 24 promotes uniformity of the heating distribution in the entire heating chamber together with the configuration of the hole portion 31 or the corner portion 30, which serves as the circulation path of the cooking dish 27, thereby promoting food. Cooking can be done without heating imbalance.

In addition, "facing" in the "facing the front part 11a" described in the above description refers to an opposing relationship from one circumferential wall side to the other circumferential wall surface side in the heating chamber 2. In order to obtain the circulation action of the hot air in the entire heating chamber 2, the openings of the ventilation duct 24 inside the heating chamber 2 and the cooking dish 27 located immediately in front of the heating chamber 2 ( 31) and relative positional relationship with.

24 shows a conventional configuration for comparison with the present embodiment. 24 which shows this conventional structure, the same code | symbol is attached | subjected to the same part as 1st Embodiment, and another part is demonstrated.

The convex part 11 is not formed in the lower part of the inner wall 2e of this heater 2, and the inner wall 2e is planar shape. In the lower portion of the inner wall 2e, a lower end ejection opening 36 composed of a plurality of transmission holes 10 is formed. In addition, the duct forming member 20 and the ventilation space 21 of 1st Embodiment are not formed in the back side of this lower stage blower outlet 36, and the lower stage blower outlet 36 produces the hot air of the direct hot air circulation unit 12 directly. It communicates with the thread 17 (refer FIG. 2).

Therefore, when the hot air circulation unit 12 is driven in the conventional configuration, the hot air generated in the hot air generating chamber 17 is strongly blown out directly from the lower air outlet 36 into the heating chamber 2, and the upper air outlet 5 and Similarly to the interruption outlet 6, the hot wind flow to which the directional direction of the hot air fan 15 is rotated is taken out as it is (see arrow B1 in FIG. 24).

For this reason, the hot wind flow becomes unbalanced, and a square part of the wind (area indicated by the symbol "Z" in FIG. 24) is generated on the back side, and hot wind imbalance and the heating imbalance tends to occur. there was.

In this respect, this embodiment can prevent the occurrence of such blind spots of hot air as much as possible, and can prevent the occurrence of hot air imbalance and heating imbalance as much as possible.

In order to verify this effect, the inventors have a convex shape having a heating cooker (hereinafter referred to as "a conventional product") of the above-described configuration and a permeation hole 10 in the lower outlet 7 in the arcuate furnace 2. Experiment 1, 2 which compared the heating cooker (product (B) of this invention) which installed the part 11 was implemented.

In these experiments 1 and 2, a conventional product (A) having two conventional cooking plates (ordinary angular plates without holes 31) disposed on the shelf support portions 25 and 26 shown in FIG. ) And a cooking dish 27 having a plurality of holes 31 or corners 30 in the upper and lower two stages on the shelf supports 25 and 26 shown in FIG. Are compared and the results are shown in FIGS. 8 and 9.

Here, FIG. 8 and FIG. 9 show a conventional product A (FIG. 8) in the case where the target temperature in the heater 2 is set in advance and the hot air is circulated by the respective hot air circulation units 12. The temperature change of the upper part, the middle part, and the lower part in the heating chamber 2 of the product B (FIG. 9) of this invention is shown.

In Experiment 1, each space divided into upper and lower three stage spaces (hereinafter, referred to as "upper, middle, lower") by the cooking dish 70 in the heating chamber 2 of the conventional product A is described. The temperature was measured by the thermocouple in the center part of each space and the center part of each space divided | segmented into three spaces of the upper and lower stages by the cooking dish 27 in the heating chamber 2 of the product (B) of this invention.

When 10 minutes have elapsed since the start of heating by the hot air circulation unit 12, in the conventional product A, the maximum temperature difference in the heating chamber 2 is 36 degrees at the upper and lower portions as shown in FIG. 8, while the product of the present invention ( In B), as shown in FIG. 9, the maximum temperature difference in the heater 2 stayed at 17 degrees in the upper part and the middle part.

For this reason, in the product B of this invention, even if the cooking pan 27 is arrange | positioned up and down two stages in the heating chamber 2, heating distribution may be uniform in the up-down direction (upper part, middle part, lower part), and the heating imbalance of foodstuffs. It is clear that cooking without this is possible and removes the difference of the baked color (baked state) of the food cooked by the cooking tray 27 of the upper and lower two stages at the time of cooking food (cooked object), such as a cookie and bread. It becomes possible.

Although not shown, the heat cooker of the present embodiment includes a cooking menu for cakes and breads (butter rolls, etc.) for the purpose of placing foods in the upper and lower cooking plates 27 and heating them uniformly in the vertical direction. It is configured to perform control for driving the hot air fan 15 and the hot air heater 16 for a predetermined time so as to maintain the temperature (170 degrees and 200 degrees, respectively) for a predetermined time (22 minutes and 18 minutes, respectively).

In Experiment 2, the target temperature in the heating chamber 2 was set to 170 degrees in advance, and the cooking dish 70 of the conventional product of FIG. 24 and the pattern of FIG. 1 when 15 minutes had elapsed from the start of heating by the hot air circulation unit 12. The temperature of the cooking dish 27 of embodiment was measured in 30 places, respectively. This measurement was performed at equal intervals in five places in the front-rear direction and six places in the left-right direction on the bottom walls of the respective cooking dishes 70 and 27.

10 and 11, (a) shows the temperature distribution in the plan view of the upper and lower cooking plates 70 disposed in the heating chamber 2 of the conventional product A, and (b) The measured value of temperature of 30 places is shown, respectively.

Similarly, in FIG. 12 and FIG. 13, (a) shows the temperature distribution of the cooking dish 27 of the upper end and the lower end of the product B of this invention, (b) has shown the temperature distribution of 30 places, respectively.

14 shows the temperature range (high temperature) of 126 degree-142 degree (Th), and the temperature range (medium temperature) of 110 degree-126 degree (Tm), 94 degree-110 about cooking dishes 70 and 27 The temperature range (low temperature) of the figure is distinguished and marked with code | symbol Tl, and each temperature distribution is shown with each code | symbol in each (a) of FIGS. 10-13.

In the conventional product (A), the maximum temperature difference is 34.5 degrees (see FIG. 10) in the upper cooking dish 70, and the maximum temperature difference is 21.9 degrees in the lower cooking dish 70 (see FIG. 11). In the product B, the maximum temperature difference stays at 17.9 degrees (refer FIG. 12) in the upper cooking dish 27, and the maximum temperature difference stays at 18.6 in the lower cooking dish 27 (refer FIG. 13).

In addition, as apparent from the contrast of Figs. 10 to 13, in the product (B) of the present invention, the ventilation space path is formed so that the temperature distribution of the cooking dish 27 can be made relatively uniform, and the horizontal direction (plane Liver can be said to eliminate the heating imbalance.

Therefore, even when cooking cakes and buns in a plurality of cooking dishes 27 and cooking the cooking menu of the cakes and breads, there is no unbalanced baking between the top and bottom planes, and the cooking of a plurality of foods is performed with the same baking addition or subtraction. It is possible to prevent the problem that only the food of the cooking dish 27 stage is not baked.

In addition, the heat cooker of this embodiment is equipped with the cooking menu of the cake and bread (butter roll etc.) for the purpose of reducing the baking imbalance by arranging a plurality of foods in the cooking dish 27, and predetermined | prescribed target temperature (170 each). FIG. 200 is configured to control the hot air fan 15 and the hot air heater 16 for a predetermined time so as to maintain a predetermined time (22 minutes and 18 minutes, respectively).

According to the said embodiment, the following effect is obtained.

The duct forming member 20 having the ventilation holes 23 composed of the plurality of permeation holes 22 is positioned between the inner wall 2e of the heating chamber 2 provided with the lower outlet 7 and the hot air casing 13. The lower end outlet 7 is mounted so as to cover the outside from the outside.

Further, the convex portion 11 is integrally provided so that the convex shape is formed inside the heater constituting the ventilation duct 24 so as to form the ventilation space 21 between the inner walls 2e, and the hot air fan 15 The air heated by the hot air heater 16 by the blowing action of the hot air is used as the hot air from the hot air generating chamber 17 to the ventilation holes 23, the ventilation space 21, and the lower outlet 7 of the ventilation duct 24, in turn. It was set as the structure supplied into the heating chamber 2 through.

Thereby, the duct forming member 20 which forms the ventilation space 21 between the inner wall 2e can be made into the simple flat shape. In addition, it is possible to prevent the duct forming member 20 from protruding largely toward the hot air casing 13 side.

In addition, the hot air blown into the ventilation space 21 through the vent port 23 from the hot air generating chamber 17 in the hot air casing 13 at the time of oven cooking using the hot air circulation unit 12 is carried out in this ventilation space 21. The strength is relaxed in the form of staying, and the direction is lost.

For this reason, the hot air blown out from the lower end outlet 7 into the heating chamber 2 is uniformly supplied into the heating chamber 2 in a rectified state, and the heating distribution can be uniformed to effectively eliminate the heating imbalance of the food.

In this case, the duct forming member 20 for forming the ventilation space 21 is disposed outside the furnace of the inner wall 2e of the heater, and the ventilation space forming duct is mounted inside the furnace 2. Since it is not a structure, a spark generate | occur | produces at the time of the microwave heating using the magnetron 28 can be prevented.

That is, in the case where the ventilation duct 24 for forming the ventilation space is mounted inside the heater 2, a small gap is formed in the junction portion between the ventilation duct and the heater 2 wall, and at the time of microwave heating. There is a risk of sparks there. In this embodiment, generation of such a spark can be prevented.

The sum total of the opening area of the permeation | transmission hole 10 of the lower end blowout opening 7 toward the ventilation space 21 was made smaller than the sum total of the opening area of the permeation hole 22 of the ventilation opening 23 toward the ventilation space 21.

Thereby, the intensity | strength of the hot air blown into the ventilation space 21 by the ventilation opening 23 can be effectively alleviated, and also the hot air fan 15 of the hot air blown in from the lower blower outlet 7 into the heating chamber 2 is carried out. Direction can be more easily lost.

The width | variety of the width direction formation area | region of the lower stage blower outlet 7 toward the ventilation space 21 is set larger than the hot air casing 13, and the permeation hole 10 of the lower stage blower outlet 7 is compared with the hot air casing 13; Since it exists also in the outer side, hot air can be supplied into the heating furnace 2 also from the position outside from the hot air casing 13.

In other words, the ventilation space 21 can be provided outside the hot air casing 13, and the rectified hot air C1 can be supplied into the heating chamber 2 in a wider range than the hot air casing 13.

The width of the duct forming member 20 is set larger than that of the hot air casing 13, and the permeation holes 22 of the ventilation holes 23 provided in the duct forming member 20 are provided only inside the hot air casing 13. Since it exists, the hot air which passed the ventilation opening 23 is surely blown into the ventilation space 21, and it can prevent a hot air from leaking out of a heating chamber from the ventilation opening 23.

In the first embodiment, the duct forming member 20 has a flat plate shape, but if the ventilation space 21 can be formed between the convex portions 11 of the inner wall 2e, it is convex to the inside of the heating chamber. It can also be made into the shape which made it convex to the outside of a heater.

The ventilation port 23 may be one instead of the plurality of transmission holes 22. In addition, the ventilation opening 23 does not need to be a hole, and the duct formation member 20 may be divided into several, and the path | route which supplies hot air from the hot air casing 13 to the ventilation space 21 may be secured.

The convex portion 11 provided with the lower outlet 7 (first venting portion) does not need to be integrally formed with the inner wall 2e, but separately forms a duct-shaped member that becomes convex into the heater. You may install it.

Moreover, in the heating cooker of this embodiment, the ventilation duct 24 which guides the hot air produced | generated in the hot-air casing 13 to supply into the heating chamber 2 through the lower outlet 7 is provided, and the cooking pan 27 ), A ventilation space passage such as the hole 31 is provided at a position facing the ventilation duct 24.

Thus, the opening of the cooking dish 27 which opposes the ventilation duct 24 in the heating chamber 2 by interposing the ventilation duct 24 between the flow of hot air from the hot air circulation unit 12 to the heating chamber 2. The part 31 can be used to circulate the hot air well in the inside of the heating chamber 2.

That is, the hot air generated in the hot air casing 13 and blown into the ventilation duct 24 from the ventilation port 23 is in a state where the intensity is relaxed in the ventilation duct 24, and is heated from the lower blower outlet 7. The directionality in the circumferential direction described above is lost when fed into the bin 2.

And the hot air blown out in the heater 2 is equally supplied from the ventilation duct 24 toward the hole part 31 side of the cooking dish 27 which opposes it, and is heated through the hole part 31 ( 2) It is possible to form a circulating flow in the whole, and to effectively eliminate the heating imbalance of food.

The first vent is a through hole 10 of the blowout outlet 7 provided in the ventilation duct 24 and a through hole 10 of the other blowout outlets 5 and 6 which directly communicate with the inside of the heater from the hot air casing 13. The non-planar shape part (ceiling wall 2a) was formed in the position which the hot air blown out from the permeation | transmission hole 10 of the upper end outlet 5 contacts with the peripheral wall surface of the heating chamber 2. Thereby, the hot air blown out from the upper outlet 5 can contact the curved surface of the ceiling wall 2a which forms the said non-planar surface, and can form the flow of a vortex (annular shape) along the curved surface. Therefore, the stirring effect of hot air can be heightened, the unbalanced hot air flow filled to the edge of the corner in a furnace can be obtained, and the uniformity of heating distribution can be promoted. Moreover, the mixing and stirring with the hot air blown out of the ceiling wall 2a direction by this hot air flow can be accelerated | stimulated, and the heating imbalance of food can be eliminated more effectively.

The perforation hole 10 of the blowout outlet 5 which directly communicates with a heater inside is formed in the upper position than the cooking plate 27 of the upper end, and is the position which opposes the permeation hole 10 in the cooking plate 27 of the upper end. The hole part 31 was provided in the hole, and the ventilation duct 24 was installed in the position below the cooking dish 27 arrange | positioned at the lower end.

Then, between the cooking dish 27 disposed at the upper end of the heating chamber 2 and the cooking dish 27 disposed at the lower side, the suction port 8 for sucking hot air in the heating chamber 2 into the hot air casing 13 is provided. Installed.

According to this, in the case where the cooking dish 27 is accommodated and arranged in two stages in the heating chamber 2, hot air is blown into the heating chamber 2 from the lower side of the upper cooking dish 27 and the lower cooking dish 27. The hot air flows toward the suction port 8 side between each cooking dish 27 through the hole portion 31 of the opposite position (front edge) of each cooking dish 27.

Therefore, heating distribution can be made more uniform in the above-mentioned upper part, middle part, and lower part in the heating chamber 2, and temperature distribution can be made more uniform than on the upper and lower cooking dishes 27. As shown in FIG.

A hole 31 is formed in the edge portion of the cooking dish 27 near the hot air casing 13, and a ventilation duct is formed on one wall surface (inner wall 2e) of the heater 2 provided with the hot air casing 13. 24) was formed so that it might become convex inside a heating furnace.

According to this, the ventilation duct 24 is projected to the inside of the heating chamber so as to be a so-called short circuit which is directly sucked into the suction port 8 through the hole 31 or the like near the hot air casing 13 on the inner wall 2e side. This can be prevented as much as possible, and a good flow of hot air can be formed in the entire furnace 2.

In addition, the duct forming member 20 which forms the ventilation space 21 between the inner walls 2e can be made into a simple flat plate shape, and the duct forming member 20 does not protrude largely toward the hot air casing 13 side. Can be.

The cooking dish 27 was formed in the shape of a square plate, and a plurality of holes 31 were arranged in the periphery of the cooking dish 27 along the longitudinal direction of the periphery thereof. According to this, the connection part 32 can be formed between the hole parts 31 in the periphery part of the cooking plate 27, and the opening area of the cooking plate 27 is set as large as possible compared with the case where one hole part is formed in each periphery. It can also suppress the fall of strength.

Shelf support parts 25 and 26 as dish support parts which support the cooking dish 27 are formed in the circumferential wall surface 2a-2e of the heater 2, and the hole part 31 is an assembly dish 27 with a shelf support part. It has the size shape which is not covered by the support part 25 and 26 in the state supported by the 25 and 26.

According to this, a good flow of hot air can be formed in the entire heating chamber 2 by using the hole 31 of the cooking dish 27 as described above, and the shelf supports 25 and 26 in the hole 31. Can be configured so as not to impede the flow of hot air.

Since the cooking dish 27 was formed by cutting each corner of the four corners of the rectangular dish in plan view, the hot air spreads through the outside of the corner portion 30 of the cooking dish 27 to the corner of the corner in the heating chamber. Since it becomes possible to circulate as much as possible, it is possible to obtain a better circulation state of hot air in the entire heating chamber 2.

In addition, since the cooking dish 27 is made of a metal material, high thermal conductivity can be obtained. Therefore, a high heating effect by heat conduction can be obtained at the time of cooking, and food can be heated efficiently.

Although the convex part 11 provided with the lower end outlet 7 was integrally comprised with the inner wall 2e in the said embodiment, it is not limited to this, The convex member provided with the duct shape which becomes a separate body with respect to a flat inner wall. (That is, a convex part of a separate body for forming a ventilation space) may be provided.

<2nd embodiment>

FIG. 15 shows a second embodiment of the present invention, which differs from the first embodiment in the following points.

That is, in the heater 2, the convex-shaped part which becomes convex inside a heater is not formed in the lower part of the inner wall 2e in which the hot air casing 13 was attached. A lower portion of the inner wall 2e has a flat surface shape, and a lower end ejection opening 7 formed of a plurality of transmission holes 10 is formed in the flat surface portion.

And the duct formation member 40 is attached to the back side (heating outside) of the said inner wall 2e. The duct forming member 40 is disposed between the inner wall 2e and the hot air casing 13 so as to cover the lower end outlet 7 from the outside of the heating chamber.

The duct formation member 40 is formed so that it may become convex on the outside of a heating furnace (inside the hot air casing 13), and the ventilation space 41 is formed between the duct formation member 40 and the inner wall 2e. The duct formation member 40 is provided with the ventilation opening 23 (2nd ventilation part) which consists of the some through-hole 22, and comprises the ventilation duct 42 with the lower part of the inner wall 2e.

In this 2nd Embodiment, especially in the lower part of the inner wall 2e in which the hot air casing 13 is mounted in the heating chamber 2, the convex-shaped part which becomes convex inside a heating chamber is not formed, but is lower part of the inner wall 2e. Since the shape is flat, there is an advantage that it can be configured so as not to reduce the volume of the heating chamber.

<Third embodiment>

Fig. 16 shows a third embodiment of the present invention, which is different from the first embodiment in the following points.

That is, the lower end outlet port 43 (first vent part) from the convex part 11 of the inner wall 2e of the heater 2 toward the ventilation space 21 is divided into a plurality of permeable through-hole groups 44. Consists of.

Each penetrating hole group 44 is composed of a plurality of penetrating holes 10, and a portion other than the penetrating hole group 44 in the convex portion 11 is a non-porous portion 45 having no penetrating hole. It is.

Moreover, the ventilation opening 46 (2nd ventilation part) is also comprised by the some permeation | transmission hole group 47 by which the duct formation member 20 was distributed. Each through hole group 47 is formed by a plurality of through holes 22. The portion of the duct forming member 20 other than the penetrating hole group 47 is a non-porous portion 48. In this case, the cutting protrusion member 49 which protrudes to the outer side (rear) of a heating furnace is formed in the peripheral edge part of the permeation | transmission hole 22 of the permeation | transmission hole group 47 of two left and right in this case. It is.

And the permeation | transmission hole group 47 of the ventilation hole 46 of the duct formation member 20, and the permeation | transmission hole group 44 of the lower end blowout opening 43 of the convex part 11 are shifted in the left-right direction, The penetration hole 22 of the penetration hole group 47 of the ventilation hole 46 is arrange | positioned in the position which opposes the non-hole area | region 45 among the formation area | regions of the lower stage blowout port 43 of the convex part 11. As shown in FIG.

In this case, hot air blown in from the air vent 46 into the air vent 21 is directed to the direction of rotation of the hot air fan 15 as indicated by arrow B2. The holeless portion 45 on the side of the convex portion 11 is arranged at a position shifted in the right direction with respect to the 47.

In the above embodiment, the hot air blown into the ventilation space 21 (that is, in the ventilation duct 24) from the hot air generating chamber 17 through the vent opening 46 during cooking of the oven is mainly free of pores of the convex portion 11. Since it comes in contact with the site | part 45, it can further suppress that hot air blown in into the ventilation space 21 is blown out immediately from inside of the lower stage blower outlet 43 to a inside of a heating furnace, and also can further reduce the intensity | strength of the hot air. As a result, the hot air blown out from the lower end outlet 43 into the heating chamber 2 can be further rectified, and the heating imbalance can be further eliminated.

In addition, since the cutting protrusion member 49 which protrudes outside the heating furnace is provided in the periphery of the permeation hole 22 of the ventilation opening 46, the hot air in the hot air generating chamber 17 is removed by the cutting protrusion member 49. It can be made easier to flow from the ventilation opening 46 to the ventilation duct 24 side.

<4th embodiment>

Then, 4th Embodiment of this invention is described with reference to FIGS. 17-19. This 4th Embodiment also attaches | subjects the same code | symbol to the same part as 1st Embodiment, abbreviate | omits description, and demonstrates another part.

The convex part 11 of the ventilation duct 24 which becomes convex toward the inside (forward) of a heater is integrally formed in the lower part of the inner wall 2e of the heater 2 as shown to FIG. 17, FIG. The convex portion 11 is provided with a lower end ejection opening 50 (first ventilation portion) composed of a plurality of transmission holes 10.

In addition, in FIG. 17, although the upper end outlet 5 formed in the inner wall 2e is not isolate | separated from left and right, it can be set as the form connected to right and left. In addition, a lower auxiliary outlet port 51 (indicated by a broken line in FIG. 17) formed of a plurality of transmission holes 10 is formed on the inner wall 2e and positioned directly above the convex portion 11.

On the back side of the inner wall 2e, a plate-like duct forming member 20 is mounted as in the first embodiment, and a hot air circulation unit 12 provided with a hot air casing 13 or the like is provided.

In each peripheral wall surface 2a to 2e forming the heater 2, wall surfaces other than the inner wall 2e in which the hot air casing 13 is installed, in this case, auxiliary ventilation in the lower part of the left wall 2c and the right wall 2d. An auxiliary blowout port 52 constituting the part is formed. The auxiliary outlet port 52 is also constituted by a plurality of transmission holes 53.

In this case, the convex part to the inside of a heating furnace is not formed in the left wall 2c and the right wall 2d, and the auxiliary blower outlet 52 is formed in the flat surface part of the left and right side wall 2c, 2d. Auxiliary duct forming members 54 are provided on the outside of the heating chambers of the left wall 2c and the right wall 2d so as to cover the auxiliary outlet port 52 from the outside of the heating chamber.

The auxiliary duct 55a is comprised by the left side auxiliary duct formation member 54 and the left wall 2c, and the inside becomes the auxiliary ventilation space 55. As shown in FIG. Similarly, the auxiliary duct 55a is comprised by the right side auxiliary duct formation member 54 and the right side wall 2d, and the auxiliary ventilation space 55 is formed.

As shown in FIG. 18, the first connection hole larger in the inclined portions 11d at the left and right ends of the convex portion 11 is larger than the through hole 10 (the through hole for taking out the hot air) of the lower blowout outlet 50. 56 is formed. Further, second connection holes 57 are formed in the rear portions of the left side wall 2c and the lower side of the right side wall 2d, which are larger than the permeation hole 53 (the permeation hole for extracting hot air) of the auxiliary blowout port 52.

Moreover, the connection duct 58 (refer FIG. 17, FIG. 18) is provided in the lower left corner and the lower right corner of the heater 2, and is located inside a furnace.

The left connection duct 58 is provided so that the 1st connection hole 56 of the left side of the convex part 11, and the 2nd connection hole 57 of the left side wall 2c may be connected, and the auxiliary ventilation space of the left side is connected. The 55 and the ventilation space 21 communicate with each other via the first connection hole 56 and the second connection hole 57.

The right contact duct 58 is also provided so as to connect the first connection hole 56 on the right side with the second connection hole 57 on the right wall 2d similarly to the connection duct 58 on the left side. The auxiliary ventilation space 55 and the ventilation space 21 communicate with each other through the first connection hole 56 and the second connection hole 57.

In this manner, a U-shaped continuous ventilation space is formed in plan view by the ventilation space 21 on the inner wall 2e side, the auxiliary ventilation space 55 on the left and right, and the connection duct 58 on the left and right.

The connection duct 58 is made of glass, for example, and the generation of sparks is prevented during the microwave heating by the magnetron 28.

Moreover, as shown in FIG. 19, all the shelf support parts of this embodiment are formed as the division support parts 25a and 25b divided | segmented into the longitudinal direction. Specifically, the split support portions 25a and 25b on the upper side are formed at positions spaced apart from each other in the front-rear direction so that a gap S is secured between the two 25a and 25b.

Although the detailed illustration is abbreviate | omitted, similarly, the clearance gap S is formed also between the divisional support parts 26a and 26b of the lower end.

Therefore, even if the cooking dish 27 is arranged in two stages up and down in the divided support parts 25a-26b, the outer peripheral edge of the cooking dish 27, the side wall 2c of right and left, and the right side wall 2d in each clearance S are shown. The opening area which communicates up and down between each other and communicates up and down by the hole part 31 of the cooking dish 27 is not narrowed.

In the above configuration, most of the hot air blown into the ventilation space 21 through the vent port 23 from the hot air generating chamber 17 of the hot air circulation unit 12 during cooking of the oven is similar to that of the first embodiment of the inner wall 2e. As shown by the white arrow C1 (refer FIG. 17, FIG. 18) from the lower stage blower outlet 50, it is taken out in a heating furnace in the rectified state. In this case, a part of the hot air blown into the ventilation space 21 passes through the first connection hole 56 and the second connection hole 57 on the left side as indicated by arrow B4 in FIG. 18. It is led to the space 55, and is also led to the auxiliary ventilation space 55 on the right side through the first connection hole 56 and the second connection hole 57 on the right side.

And the hot air guided to these auxiliary ventilation spaces 21 is blown out into the furnace in the state rectified from the auxiliary blowout port 52 of the left wall 2c, as shown by the white arrow C2 in FIG. 17, FIG. Moreover, it is taken out in a heating furnace in the state rectified from the auxiliary blower outlet 52 of the right side wall 2d.

As a result, hot air is blown out from the lower end outlet 50 of the inner wall 2e toward the front in the lower part of the heating chamber 2, and is also heated from the auxiliary outlet port 52 of the left wall 2c and the right wall 2d. It can be taken out into a high temperature, the heating distribution can be made more uniform, and the heating imbalance of food can be solved more effectively.

In addition, the hot air blown out from the auxiliary outlet port 52 of the left wall 2c into the heating chamber is the right side wall 2d side facing the left wall 2c in the heating chamber 2, that is, the right side of the cooking dish 27. The flow toward the hole part 31 side of the part is formed. The hot air blown out from the auxiliary outlet port 52 of the right side wall 2d into the heating chamber flows toward the hole 31 in the left side of the cooking dish 27 facing the right side wall 2d in the heating chamber 2d. Form.

Therefore, the hot air is supplied from the ventilation duct 24 and the left and right auxiliary ducts 55a and 55b toward the hole 31 of the front side and the left and right sides of the cooking dish 27 to the lower part of the heating chamber 2, respectively. Through the outside of these hole portions 31 or each corner portion 30, a hot wind flow without any unbalanced fills to the corners of the corners in the furnace is formed.

In addition, since the cooking dish 27 is supported by the divided support portions 25a to 26b, the hot air can be circulated in the vertical direction even in the above-described gaps S, so that the heating distribution can be made more uniform, and the food is unbalanced. Can be cooked without.

In this embodiment, a part of hot air in the hot air casing 13 is attached to the peripheral walls 2c and 2d other than the inner wall 2e in which the hot air casing 13 is installed among the peripheral wall surfaces 2a to 2e of the heater 2. The auxiliary ducts 55a and 55a for supplying into the heating furnace 2 were installed.

According to this, during the oven cooking, hot air is blown out from the ventilation duct 24 as well as from the auxiliary ducts 55a and 55a toward the side facing the ducts 24, 55a and 55a, respectively. do. The hot air supplied into the furnace 2 does not remain throughout the inside of the furnace through the plurality of holes 31 around the circumference of the cooking dish 27 facing the ducts 24, 55a, 55a, respectively. Since the flow can be formed, the heating distribution can be made more uniform, and the heating imbalance of the food can be more effectively resolved.

Since the connection duct 58 which connects the part which installed the lower end blowout outlet 50 facing the ventilation space 21, and the part which installed the left and right auxiliary blowout outlets 52 was provided, respectively, it does not have a complicated structure, 58, hot air can also be sent to the auxiliary outlet port 52 of the left wall 2c and the right wall 2d different from the inner wall 2e.

The part in which the lower end blower outlet 50 which faces the ventilation space 21 is provided by the convex-shaped part 11 which becomes convex in the inside of a heater, and a part of the hot air produced | generated in the hot air production | generation room 17 was made into the auxiliary blower outlet ( The auxiliary ventilation duct 54 which guides to 52 is provided in the structure installed in the outer side of a heater. By setting it as such a structure, it can suppress that the inside volume of a heating chamber becomes small although it is the structure which blows out hot air into the heating chamber from the left-right auxiliary blowout port 52. As shown in FIG.

The convex part 11 in which the lower end blowout port 50 which faces the ventilation space 21 was provided is provided with the 1st connection hole 56 larger than the permeation hole 22 which blows hot air into a heating chamber, and the auxiliary blowout hole ( On the left side wall 2c and the right side wall 2d on which the 52 is formed, a second connection hole 57 larger than the transmission hole 53 which blows out the hot air into the heating chamber is provided, and the connection duct 58 is formed of these. It arrange | positioned so that 1st connection hole 56 and 2nd connection hole 57 may be connected.

With such a configuration, since the holes (the first connection hole 56 and the second connection hole 57) to be sent from the ventilation space 21 to the left and right auxiliary ventilation spaces 55 are large, the right and left sides of the ventilation space 21 The auxiliary ventilation space 55 can smoothly send hot air with little resistance.

The present inventors refer to a heat cooker having a convex portion 11 having a lower outlet 7 in the arc-shaped heater 2 and auxiliary ducts 55a and 55a (product C of the present invention, FIG. 17). ), The same experiments 1 and 2 as in the first embodiment were performed. FIG. 20 is a view corresponding to FIG. 9, and FIGS. 21 and 22 are views corresponding to FIGS. 12 and 13.

That is, in the product (C) of the present invention, in experiment 1, the maximum temperature difference in the heating chamber 2 is only 3 degrees at the top and bottom (see FIG. 20), and in the experiment 2, the maximum temperature difference in the cooking dish 27 at the top. 19.4 degrees (refer FIG. 21), and the maximum temperature difference stays at 18.9 degrees in the cooking dish 27 of a lower part (refer FIG. 22). Therefore, in the product (C) of the present invention, the temperature difference in the vertical direction (upper, middle, lower) in the heating chamber 2 can be eliminated as much as possible, a very good temperature distribution can be obtained, and each cooking dish ( 27, it is possible to ensure a uniform temperature distribution.

<Other Embodiments>

Fig. 23 shows a fifth embodiment of the present invention. The cooking dish 60 of this 5th embodiment differs from the cooking dish 27 of said 1st-4th embodiment in the following points.

That is, the cooking dish 60 is made of ceramic as a non-metal material, and the flange portion 60c has, for example, a plurality of round holes (hole portions) 61 along the periphery of the cooking dish 60. Each side of 27) is arranged side by side. As shown in Fig. 23, the round holes 61 are punched holes, and each of the round holes 61 is formed at each of the left and right sides of the front and rear sides, and is formed at the left and right sides of each of the 16 areas.

Thereby, the cooking dish 60 becomes a structure in which the connection part 62 exists in each between the round holes 61 adjacent to the longitudinal direction of the periphery. Moreover, the corner part 63 similar to the corner part 30 of the cooking dish 27 is formed in the flange part 60c of the cooking dish 60.

In addition, in the bottom wall 60a of the cooking dish 60, both the recessed part 33 for preventing curvature shown in FIG. 6, and the display part 34 for drawing attention are abbreviate | omitted.

When the cooking dish 60 of 5th Embodiment is installed in the heating chamber 2 and oven cooking is performed, since the hot air which flows in the inside of a heating chamber will flow easily through the round hole 61 of the flange part 60c, As in the first to fourth embodiments, hot air can be spread throughout the inside of the heating chamber, and generation of heating imbalance can be prevented as much as possible.

Moreover, even if the cooking dish 60 is comprised with ceramic and the cooking dish 60 is arrange | positioned in the heating chamber 2 at the time of the microwave heating by the magnetron 28, generation of a spark can be prevented.

This invention is not limited only to the said embodiment, It can change or expand as follows.

For example, the hot air circulation unit 12 is not limited to being disposed on the inner wall 2e of the heater 2, and may be disposed on the left wall 2c or the right wall 2d.

The duct forming members 20 and 40 are not limited to the site | part corresponding to the lower end outlet 7, You may arrange | position to the site | part corresponding to the upper end outlet 5 and the interruption | exit outlet 6.

2: heater 2a: non-planar shape
2e: inner wall 7, 43, 50: first vent
8: intake port 10, 22: through hole
12 hot air circulation unit 13 hot air casing
14: fan motor 15: hot air fan
16: hot air heater 17: hot air generating room
20: duct forming member 21: ventilation space
23, 46: second vent 24, 42: vent duct
25, 25a, 25b, 26, 26a, 26b: plate support 27, 60: cooking dish
31, 61: hole 54: auxiliary ventilation duct
55a: secondary duct

Claims (19)

Heater to accommodate food,
A first ventilation part having a plurality of transmission holes provided in at least one of the peripheral wall surfaces forming the heater,
A hot air casing, which is provided outside the heater on the circumferential wall surface on which the first vent is formed, and forms a hot air generating chamber that is ventilated with the inside of the heater through the first vent,
A hot wind heater for heating air in the hot wind generating chamber, and a hot wind fan installed to be rotationally driven by a fan motor in the hot wind generating chamber,
A duct forming member covering at least a part of said first ventilating portion and forming a ventilation space between said peripheral wall surfaces where said first ventilating portion is provided,
And a hot air generated in the hot air casing from the ventilation space into the heating chamber through the duct forming member. The method of claim 1,
And a portion provided with the first vent on the circumferential wall surface on which the first vent is provided so as to be convex toward the inside of the heater. The method of claim 1,
And the duct forming member is formed so as to be convex toward the outside of the heater. The method of claim 1,
The formation region of the first ventilating portion facing the ventilation space is set wider than the ventilating casing, and the permeation hole of the first ventilating portion is also located outside the hot air casing.
The said duct formation member is installed so that at least one part may be located outside the said hot air casing, and hot air is supplied to the said ventilation space from the inside of the said hot air casing. The method of claim 1,
And a circumferential wall surface forming the heater, the hot air casing and the duct forming member comprise the same kind of material. The method of claim 1,
The duct forming member has a second vent provided with a plurality of through holes,
And a total sum of the opening areas of the transmission holes of the first ventilation part facing the ventilation space is smaller than the sum of the opening areas of the transmission holes of the second ventilation parts facing the ventilation space. The method according to claim 6,
And the permeation hole of the second ventilating portion is disposed at a position facing the non-pore portion where the permeation hole is not formed in the formation region of the first venting portion. The method of claim 1,
And an auxiliary ventilation portion for supplying a part of the hot air generated in the hot air generating chamber into the heating chamber on a wall other than the wall surface on which the hot air casing is installed, on the peripheral wall surface forming the heating chamber. The method of claim 8,
And a connection duct for connecting a portion provided with the first ventilation portion facing the ventilation space and a portion provided with the auxiliary ventilation portion. The method of claim 8,
A portion provided with the first ventilation portion facing the ventilation space is formed to be convex in the heater, and an auxiliary ventilation duct for guiding a part of the hot air generated in the hot air generating chamber to the auxiliary ventilation portion is located outside the heater. Heating cooker, characterized in that installed. The method of claim 9,
The first connection hole which is larger than the permeation hole which blows hot air into a heating chamber is provided in the part which formed the 1st ventilation part which faces the ventilation space, and the part which formed the auxiliary ventilation part is larger than the penetration hole which blows out the hot air into a heating chamber. Install a large second connection hole,
And the connection duct is arranged to connect the first connection hole and the second connection hole. The method of claim 9,
The first ventilating portion facing the ventilation space is installed in a portion formed to convex the inner wall of the heater to the inside of the heater, the heating duct is characterized in that the ceramic duct or glass located inside the furnace . The method of claim 1,
And a hot air supplied through the ventilation space circulates through the ventilation space path installed at a position opposite to the ventilation duct forming the ventilation space of the cooking dish disposed in the heater. The method of claim 13,
The first ventilating portion comprises a through hole provided in the ventilating duct, and a through hole directly passing from the hot air casing to the inside of the heater.
And a non-planar shape portion is formed on a circumferential wall surface of the heater at a position at which hot air taken out from the transmission hole directly passing from the hot air casing to the inside of the heater contacts. The method of claim 13,
The heater can house and arrange the cooking dish as the first and second cooking dishes in two stages up and down,
The permeation hole which directly communicates with the inside of the heater is formed at a position above the first cooking dish disposed at the upper end, and a ventilation space path is provided at a position facing the permeation hole of the first cooking dish at the upper end. ,
The ventilation duct is installed at a position lower than the second cooking dish disposed at the lower end,
And an intake hole for sucking hot air in the heater into the hot air casing between the first cooking dish disposed at the upper end and the second cooking dish disposed at the lower end. The method of claim 15,
The ventilation space path is formed at an edge portion near the hot air casing of the cooking dish,
And the ventilation duct is formed on one wall of the heater in which the hot air casing is installed to be convex in the heater. 17. The method of claim 16,
The cooking dish is formed in an angled plate shape, and the ventilation space is formed in a plurality of periphery of the cooking dish along the lengthwise direction of the peripheral portion of the cooking dish. The method of claim 13,
A dish supporter supporting a peripheral portion of the cooking dish on a peripheral wall surface of the heater,
And the cooking space has a size shape that is not covered by the support part while the cooking dish is supported by the plate support part. The method of claim 13,
The cooking dish is a heating cooker characterized by forming a shape in which each of the corners of the four corners of the rectangular plate is cut in plan view.

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