JP2002039540A - Cooker - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the price of a heating cooker, to reduce the size and weight, and to improve the thermal efficiency of a thermos, such as a thermos. SOLUTION: Openings 12 and 13 at both ends of a metal, double vacuum circular cylinder 11 are a rear lid 26 and a door 1 as a front lid.
7 and the heating source of the magnetron 40 and the sheathed heater 35 and the fan motor (peripheral parts) 48 are attached to the lid 26. The space surrounded by the cylinder 11, the lid 26 and the door 17 is vertically and horizontally. Since it is vacuum insulation, high thermal efficiency can be obtained, and if the cylinder is made into a single tube, the heating chamber becomes an outer box as it is, and the ultimate simplification can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device for heating food, and more particularly to simplifying the structure of equipment and improving thermal efficiency.

[0002]

2. Description of the Related Art Microwave ovens currently on the market generally have a rectangular parallelepiped double structure composed of a metal plate, and the inside is used as a heating chamber and the outside is used as an outer box. However, in the industry where there is a strong demand for cost reduction and lightness / shorterness, there have been attempts for a long time to eliminate an unnecessary double structure and make a single structure, that is, a heating chamber also serve as an outer box. However, although the back surface and the bottom surface are partially put to practical use, the top surface and the left and right side surfaces still have a double structure. In addition, in order to improve the thermal efficiency of an oven or a microwave oven with an oven function, there is a plan to use a cylindrical vacuum double container like a thermos as a heating chamber, but this has not been realized.

An attempt to solve these problems is disclosed in Japanese Patent Application Laid-Open No. Hei 8-50989. This publication describes that all the essential components such as a magnetron and a heater are accommodated in a lid that covers an opening of a vacuum double cylindrical container or a single cylindrical container, and a door is also provided.

[0004]

However, in the above-mentioned conventional configuration, since a lid is provided with a door, there is no space for arranging essential parts such as a magnetron and the like. On the contrary, there is a problem that the structure becomes complicated.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a heating cooker which has a simple structure, is lightweight and compact, and has excellent heat efficiency.

[0006]

In order to solve the above-mentioned conventional problems, a heating cooker of the present invention uses a cylinder having openings at both ends, a door is provided at one of the openings, and a lid is provided at the other. The lid is provided with a heating source for heating the food and peripheral components of the heating source. In this configuration, the door and the heat source are arranged separately at both ends of the cylinder, so that the door can secure a sufficient size, and since the heat source and peripheral parts have no door, they can be arranged over the entire cross section of the cylinder. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a cylinder having openings at both ends, a rotatable door provided at one of the openings for taking in and out food, and a lid provided at the other of the openings. And a heating chamber provided between the door and the lid for heating the food, wherein a heating source for heating the food and peripheral parts of the heating source are provided on the lid. In this configuration, the door and the heat source are separated at both ends of the cylinder, so the door can have a sufficient size, and the heating source and peripheral parts do not have doors, so they can be arranged over the entire cross-section of the cylinder. , Light and thin with a simple configuration.

[0008] The invention described in claim 2 is particularly advantageous in claim 1.
By making the cylinder described in (1) a cylinder having a vacuum double structure, the heat dissipation from the heating chamber can be reduced and the heat efficiency can be improved.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a heating cooker according to one embodiment of the present invention. In the figure, a cylinder 11 is a thin stainless steel sheet metal cylinder, having an inner diameter of about 30 cm and an outer diameter of about 32 cm, and the space between the inner and outer cylinders is in a vacuum state similar to that of a thermos. An opening 12 is provided at the rear end of the cylinder 11.
Six female screws 12a are provided on the periphery. Of course, the female screw 12a is attached to the outside of the cylinder 11. Although not shown in FIG. 1, an opening 13 having substantially the same shape is provided at the opposite front end. However, there is no female screw. A band 14 made of stainless steel sheet is wound around the outside near the front end.
6 is attached to the fixed side 16a from above and below. The rotating side 16b of the hinge is fixed to the side of the door 17, and the hinge pin 1
At 6c, the two are combined and function as a piano hinge 16.

The door 17 itself is a front lid for closing the front end opening 13. The front and rear parts are composed of two parts.
Choke 18 having an outer diameter slightly smaller than the inner diameter of
This is a so-called Raytheon-type radio wave leakage prevention mechanism. Rear surface 19
Is a plate made of stainless steel and has a group of small holes 2 for see-through at the center.
0 is provided. The front is a shallow rectangular tube 21, and the length of one side is approximately the same as the outer diameter of the tube 11. A cushion 23 made of silicone rubber is fixed to the rear surface 22 of the square tube 21 outside the choke 18. A hole 24 is formed near the hinge 16b, and a lead wire passes through the hole 24.

The rear lid 26 is made of sheet metal and has a substantially cylindrical shape. The outer diameter of the cylinder is the same as the outer diameter of the cylinder 11, but the lower part has a shape bulging to the same height as the lower part of the band 14. A power cord 28, an intake louver 29, an exhaust louver 30, and an exhaust small hole 31 are provided on the rear surface 27 from below.
A square hole 32 for a lead wire and a small fixing hole 33 are provided on the side surface. The lid 26 is also composed of two front and rear parts similarly to the door 17, and the front surface is a cylinder 34 having an outer shape slightly smaller than the inner diameter of the tube 11, and two U-shaped sheathed heaters are provided on the front surface. (Heating source) 35 and a turntable driving shaft mechanism 36 are provided. However, only the upper sheathed heater is illustrated in FIG. 1, and the lower portion is a position overlapping the shaft mechanism 36 and is not illustrated due to complexity.

The cover 37 is made of stainless steel sheet having a substantially U-shaped cross section. The front part is fitted into the screw 15 by a key-shaped notch 37a, and the rear part is the fixing hole 33.
Is fixed with screws using small holes 37b fitted into the holes.
It functions to protect the lead wire connecting the door 17 as the front lid and the rear lid 26.

FIG. 2 is a sectional view of a main part of a microwave oven which is a heating cooker according to one embodiment of the present invention, and shows an assembled state. The front surface of the lid 26 is a cylindrical portion 34 having an outer diameter slightly smaller than the inner diameter of the cylinder 11 as described above, and the front surface 38 of the cylindrical portion 34 is substantially flat. A recess 39 is provided in the center of the front surface 38, and an antenna 40a of a magnetron 40, which is a high-frequency heating source, is inserted. The opening of the recess 39 is closed with an opening cover 41 made of mica laminate, and a heat insulating material 42 is attached around the recess 39 and the entire front surface 38.

The parts penetrating the heat insulating material 42 will be described. An exhaust guide 43 is formed at the top of the small hole 44 formed in the front surface 38 of the cylindrical portion 34, and the exhaust small hole 31 formed on the rear surface 27 of the lid 26. Attached. The small protrusion at the center is for preventing wire insertion, and a humidity sensor (not shown)
To the inside of this exhaust guide. Next, the upper side of the two upper and lower sheathed heaters 35 is screwed to the front surface 38, and the connection terminal 35 a reaches a position penetrating the heat insulating material 42. One outlet 46c of the air guide 46 is connected to the small air introducing hole 45 formed in the lower part thereof, the other outlet 46b is connected to the exhaust louver 30, and the inlet 46a is connected to the magnetron 40.

The shaft mechanism 36 for driving the turntable has one end of a stainless steel pipe 36a fixed to the front surface 38 with a screw, and the other end fixed to a die-cast gear box 36b. A shaft 36c is provided, and is coupled to the metal shaft 36e by a pair of bevel gears 36d, and to the output shaft 45a of the motor 45 by concave and convex fitting. The motor 45 is fixed outside the heat insulating material 42, and its output shaft 45a penetrates the heat insulating material.
The lower side of the two upper and lower sheathed heaters 35 is drawn only at the tip at a position overlapping the shaft mechanism 36. The mounting part is the same as above.

Six small holes are formed in the surface 46 that defines the front and rear boundaries of the lid 26 at positions corresponding to the female screws 12 a on the periphery of the opening 12, and are fixed with screws 47. A fan motor 48, which is a peripheral component of the heating source, is attached to a lower portion of the magnetron 40, and its outlet is directed to the magnetron 40 and an inverter (not shown). A turntable 49 made of metal is placed on the shaft 36c, and a disc made of ceramic and a tray support 50 are placed thereon.

The group of small holes 20 for see-through is formed on the rear surface 19 of the door 17 as a front lid. A glass plate 51 is attached to the back side of the group of small holes 20 to close the group of small holes 20. In parallel with this, another glass plate 52 is provided, and a space formed by both glass plates is sealed with a fixing metal plate. A transparent resin plate 53 of acrylic or the like and an operation unit 54 are provided on the frontmost surface of the door. A hall IC 55 is mounted on the door 17 side and a magnet 56 is mounted on the cylinder 11 side with the silicone rubber buffer 23 interposed therebetween. The Hall IC 55 has a plurality of elements including at least one element that reacts and conducts with each of the magnetic poles of the NS arranged close to each other.
It is assumed that a magnetic pole arrangement for conducting each element of C55 is provided. The magnet 56 is also attached to a portion without the Hall IC 55, and the opposing rear plate 22 is made of a material that is attracted to the magnet, and serves as a holding force when the door 17 is closed.

Next, the operation and operation will be described. The inside of the cylinder 11, the front surface 38 of the lid 26 and the rear surface 1 of the door 17, which is the front lid.
9 is used as a heating chamber for heating the food. This cylindrical space 57
Has excellent heat insulating effect. That is, the cylinder 11 has the same vacuum structure as the thermos bottle, one of the two ends of the cylinder 11 is provided with the heat insulating material 42, and the other is a sealed space formed by the two glass plates 51 and 52. Since the sheathed heater 35 and the magnetron 40, which are heating sources, are both attached to the front surface 38 and attached to the cylindrical space 57, the heat of the sheathed heater 35 is released to the cylindrical space 57 and the magnetron 40 is heated. High frequencies are also radiated to the cylindrical space 57.

Next, the flow of the wind will be described. Fan motor 4
When 8 rotates, external air is sucked from the intake louver 29. Part of the wind blown from the fan motor 48 cools the inverter and is exhausted from the exhaust louver 30 to the outside. The remainder of the wind blown from the fan motor 48 cools the magnetron 40 and then enters the air guide entrance 46a.
From the exhaust outlet 46b to the louver 3
It is discharged outside through 0. The remainder enters the heating chamber 57, which is a cylindrical space, from the outlet 46c through the intake port 45, and is discharged to the outside through the exhaust port 44, the exhaust guide 43, and the exhaust small hole 31 together with the vapor or odor discharged from the food. You.

The Hall IC 55 operates as a latch switch. When the door 17 is closed, the magnets 56 are opposed to each other with the buffer 23 interposed therebetween, so that the magnets 56 are separated from each other. Even when an arbitrary magnet is brought close to the door 17 when the door 17 is opened as defined in the U.S.A.
At least two types, one that conducts at the N magnetic pole and one that conducts at the S magnetic pole, are included and installed adjacently, so even if a normal magnet magnetized to only one of S or N is brought close At least one does not conduct.

Since the operation unit 54 is attached to the door 17 which is a front lid, the operation of the operation unit 54 is performed by the sheath heater (heating source) 35, the magnetron (heating source) 40, and the rear lid 26 in which the fan motor (peripheral parts) 48 are stored. Lead wires for connecting between them are required. This is passed through the outside of the cylinder 11 and covered with the metal cover 37, so that the danger of human hands directly touching the lead wire can be eliminated.

Since the cylinder 11 is formed as a cylinder, corners that are difficult to clean are reduced as compared with a conventional rectangular parallelepiped heating chamber, and if the volume is the same, the wall area is reduced, so that high-frequency loss is generally reduced. For the same reason, the thermal efficiency is improved even without a vacuum.
That is, since the surface area is reduced, the heat dissipation from the surface is reduced, and the large amount of heat dissipation from the two-sided joint flange portion, which is essential in the case of the conventional rectangular parallelepiped, is eliminated.

In this embodiment, a microwave oven, an oven, and a microwave oven, which is the most complicated of microwave ovens, are taken. Therefore, the cylinder 11 has a thermos bottle type cylindrical vacuum double structure having excellent heat efficiency, and the heating source is a heater and a magnetron. An example is shown in which both are stored in one lid, but if the oven does not have a microwave oven function, the magnetron and other microwave-related parts can be omitted, and the configuration becomes simpler. In a microwave oven having no oven function, the outer cylinder may be omitted and the inner cylinder may be single. In this case, the cylinder 11 is both a heating chamber 57 and an outer box, and becomes a long-awaited single-structure microwave oven. Furthermore, in this case, since a thermos-type vacuum double is unnecessary, the cylinder 11 does not need to be circular, and can be a square cylinder. If it is a square tube, the appearance will be similar to the conventional one, and the uncomfortable feeling that is common in new products will be reduced.

Although the turntable driving shaft mechanism 36 is fixed to the rear lid 26, it may be fixed to the door 17 if the hinge 16 has sufficient strength. In this case door 1
When the door 7 is opened, the turntable 49 and the dish tray 50 are pulled out together with the door, so that the food can be easily taken in and out. If this type of mechanism is not adopted, the door 17 can also be opened vertically, which is generally widely used. In the case of the vertical opening, it is necessary to devise a device for supporting the weight of the door, and it is desirable to provide the device outside the cylinder 11. However, various ideas have been filed in the past, and will not be described here because they are not the gist of the present invention.

It is also possible to omit the band 14 and directly fix the fixing hinge 16a to the outside of the cylinder 11 by welding or the like. In this case, the fixed hinge 16a is welded before the vacuum is applied, and the outer wall of the cylinder 11 needs to have a sufficient thickness to obtain the required strength. In the case of the band system as in the present embodiment, the strength is shared around the entire circumference of the cylinder, so that a relatively thin plate can be used and can be mounted after the vacuum processing, thereby facilitating the handling.

Although six screws are used for fixing and connecting the cylinder 11 and the lid 26, this is for preventing radio wave leakage from the connection part, and it is obvious that the number of screws may be increased or decreased as necessary. Cylindrical part 3
It depends on whether or not 4 and the inside of the cylinder 11 are surely in contact with each other. It is also possible to insert a metal mesh between them or provide the same mechanism as the choke 18 here to reduce the number of screws.

[0028]

As described above, according to the first aspect of the present invention, the left, right, upper and lower sides of the heating chamber function as outer boxes of the microwave oven as they are, and are compared with the conventional double structure of the outer box and the heating chamber. ,
Since the outer box is omitted, it can be made light and thin with a simple configuration.

According to the second aspect of the present invention, the same thermal efficiency as that of a thermos can be obtained by adopting a cylinder having a vacuum double structure having the same cylindrical shape as the thermos.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a cooking device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the cooking device.

[Explanation of symbols]

 11 cylinder 12 opening 13 opening 17 door 26 lid 35 sheathed heater (heating source) 40 magnetron (heating source) 48 fan motor (peripheral parts)

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // A47J 41/02 102 A47J 41/02 102D H05B 6/64 H05B 6/64 DF term (reference) 3K090 AA04 AB02 BA01 BA09 BB01 EA01 EA02 EB02 EB10 EB16 EB29 FA05 JA01 3L086 AA02 AA03 AA04 BA08 BB01 BB02 BB04 BB05 BC06 BC20 BD02 DA06 DA19 DA23 4B002 AA18 AA21 BA07 BA53 BA55 CA23 CA32 CA34

Claims (2)

[Claims] 1. A cylinder having openings at both ends, a rotatable door provided at one of said openings for taking in and out of food, a lid provided at the other of said openings, and between said door and said lid. A heating cooker comprising: a provided heating chamber for heating the food; and a heating source for heating the food and peripheral components of the heating source provided on the lid. 2. The heating cooker according to claim 1, wherein a cylinder having a vacuum double structure is used as the cylinder.