JPH0533937A - Rotary chamber type and combined type heating device - Google Patents

Abstract

PURPOSE:To provide an entire small-sized device by a method wherein a hot air chamber is comprised of a hot air forming means for forming hot air and a micro-wave source for radiating a micro-wave toward a heating chamber, a rotary chamber is used and even a thick heated item is continuously heated at a high speed in high quality from its surface to its inner part. CONSTITUTION:A rear upper half part of an upper nozzle disk 11A and a rear lower half part of a lower nozzle disk 11B within a cabinet 1 are provided with hot air chambers 3. Each of the hot air chambers 3 is provided with a heater 7. Hot air fans 6 are connected to the hot air chambers 3. A rear part of a rotary chamber side wall member 16 within the cabinet 1 is provided with a magnetron 8 serving as a micro-wave source. The magnetron 8 has an antenna 14 so as to radiate a micro-wave from this antenna 14 into a rotary chamber 15 through small holes 16A of the rotary chamber side wall member 16. Accordingly, the device can be made small in size and even thick item to be heated can be heat processed from its surface into its inner part in high quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for performing heating such as baking various foods, and more particularly to a combined heating device that uses both microwave heating and hot air jet heating. .

[0002]

2. Description of the Related Art A microwave heating device for cooking foods using microwave energy is generally a conveyor type heating device capable of continuous heating suitable for large-scale cooking, and completes cooking for each batch. There is a batch type heating device. Some conveyor-type heating devices have elevator doors at the exit and entrance of the conveyor. A typical example of a batch-type microwave heating device is a microwave oven for home and business use.

FIG. 16 of the accompanying drawings schematically shows a structural example of a conventional conveyor type microwave heating apparatus. This conveyor type microwave heating device is hung on a device base 100 between drums 102 and 102,
A conveyor belt 103 that is moved by a drive motor 101, a housing 105 that is disposed on the conveyor belt 103 to define a microwave oven, and a microwave that radiates microwaves into the housing 105 through a waveguide 108. A wave generator 106 and a stirrer fan 109 arranged in the casing 105 for stirring microwaves are provided. A microwave trap 110 including a radio wave absorber 111 is provided on the conveyor belt 103 at the entrance and exit of the casing 105 that constitutes the microwave oven. In this conventional conveyor type microwave heating device, the food material 104 placed on the conveyor belt 103 is
When the food is moved to enter the oven, microwaves are applied to heat and cook, and the food is collected after leaving the oven.

A schematic example of a conventional batch type microwave heating device is shown in FIG. 17 of the accompanying drawings. In this batch type microwave heating device, a turntable 203 that is rotated by a drive motor 202 is provided in a cabinet 200 having a door 201 for loading and unloading objects to be heated on its front surface, and a turntable 203 is guided above the turntable 203. The microwave from the microwave generator 205 is radiated through the tube 206, and the stirrer fan 207 stirs the microwave. In this conventional batch type microwave heating device, the food 20 to be heated is placed on the tar table 203.
4 put, close the door 201, microwave the ingredients 204
Irradiate with respect to and cook, and the door 201 is opened again to collect the food.

[0005]

In the conventional conveyor type heating apparatus as described above, the inlet and the outlet of the oven are always open in order to continuously cook the foodstuffs on the conveyor. It is disadvantageous from the viewpoint of microwave leakage. Therefore, generally, as shown in FIG. 16, the microwave trap 110 has to be provided above the belt conveyor at the inlet and outlet of the oven over a considerably long distance. Therefore, the total length of the heating device including the length of the oven and the length of the microwave trap is considerably long, and it cannot be installed unless the place is a food factory having a large space.

[0006] Further, no matter how many microwave traps are provided, the space between the conveyor and the lower side of the trap portion is equal to the space excluding the height of foodstuffs. Accidents may occur, especially for inexperienced operators who do not have sufficient safety.

The conventional batch-type heating device as described above can cook only the foodstuffs for each batch, and cooks foodstuffs that require a certain amount of cooking time, or when the cooking frequency is high (especially, cooking at a certain time). When concentrated, the heating device cannot be used efficiently, which is disadvantageous.

Furthermore, the batch type cannot cope with the heat treatment amount, but when the space for installing the heat treatment device cannot be sufficiently secured, even if the conveyor type heating device is downsized, When the operator is constantly changing or an unfamiliar operator operates,
There is a full risk of suffering microwave interference.

Moreover, in the conventional heating apparatus as described above, whether it is a continuous type or a batch type, only microwave heating is used. From the surface to the inside, high quality and high speed heat treatment was not possible.

An object of the present invention is to provide a rotary chamber type composite heating apparatus which can solve the problems of the conventional techniques.

[0011]

A rotary chamber type composite heating apparatus according to the present invention comprises a cabinet having an inlet / outlet port for an object to be heated, in which a cabinet is provided between an upper nozzle plate and a lower nozzle plate. A heating chamber communicating with the inlet / outlet port and a hot air chamber located above the upper nozzle plate and below the lower nozzle plate are provided, and hot air forming for forming hot air in the hot air chamber is provided. Means and a microwave source for radiating microwaves to the heating chamber, wherein the heating chamber is mounted on a rotary shaft that is rotated by a rotary drive source, and includes the upper nozzle plate and the lower nozzle plate. The object-to-be-heated mounting table for mounting the object-to-be-heated, which is rotated together with the rotary shaft, in a plane located at an approximately intermediate level between Between the upper nozzle plate and the lower nozzle plate is provided with a plurality of partition walls that radially extend from the rotary shaft to partition the heating chamber into a plurality of partition chambers and rotate together with the rotary shaft, and the partition wall is It is formed of a material that does not allow microwaves to pass therethrough, and on both sides of the entrance / exit, rotation of the object mounting base and the partition wall is allowed, but at the time of these rotations, microwaves from the entrance / exit opening to the cabinet. There is a shielding wall to prevent it from leaking out of the
The hot air from the hot air chamber is injected into the heating chamber through a large number of nozzle holes provided in the upper nozzle plate and the lower nozzle plate.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings, FIG. 1 to FIG.

FIG. 1 is a perspective view of a rotary chamber type composite heating apparatus as an embodiment of the present invention, and FIG.
2 is a schematic diagram showing the internal structure of the composite heating device of FIG. As shown in FIGS. 1 and 2, the rotary chamber type composite heating apparatus of this embodiment is provided with a rotary chamber 15 in a box-shaped cabinet 1. A square hole 5 that is always open is provided in the center of the front side of the box-shaped cabinet 1, and the square hole 5 constitutes an inlet / outlet for an object to be heated. A preparation shelf 4 is provided so as to project from the lower side of the square hole 5 on the front side of the cabinet 1. As will be described later, through this preparation shelf 4,
The food to be heated is placed on a cooking table as a heated object placing table that rotates in the cabinet, or the cooked food is taken out from the cooking table.

FIG. 3 is a perspective view showing the detailed structure of the rotary chamber 15 of the combined heating apparatus shown in FIG. 1. As shown in FIG. 3, the rotary chamber 15 has a disk-shaped upper nozzle disk 11A. Lower nozzle disk 1
1B and the cooking table 12 are attached to the rotating shaft 10. Further, the rotating shaft 10 includes a cooking table 1
A partition wall member 30 having six partition walls 31 radially extending from the rotating shaft 10 is mounted between the upper nozzle disk 11A and the lower nozzle disk 11B with the two in between.

FIG. 4 is a sectional view taken along the line AA in FIG. 1. As is often shown in FIG. 4, in this embodiment,
The partition wall member 30 has six partition walls 31 extending radially from the rotary shaft 10 at angular intervals of 60 degrees. The root of the partition wall 31 on the rotary shaft 10 side is formed with a corner R in order to facilitate cleaning of the vicinity of the rotary shaft 10. The partition wall member 30 is made of a material that does not transmit microwaves.

FIG. 6 is a sectional view taken along the line BB in FIG. 1. As shown in FIG.
It is arranged in the heating chamber 2 in the cabinet 1 and is rotated as a whole by rotating the rotary shaft 10 by the drive motor 9. The rotation speed of the rotation chamber 15 can be changed according to cooking conditions. The heating chamber 2 is provided with a rotary chamber side wall member 16 that surrounds the rotary chamber 15, and the rotary chamber side wall member 16 is fixedly attached to the cabinet 1.

FIG. 7 shows this rotary chamber side wall member 16.
8 is a perspective view showing the details of the rotation chamber side wall member 16 as shown in FIG.
The small holes 16A are formed by being dispersed in the height direction by 80 degrees. The small holes 16A are used for exhausting hot air jets as will be described later, and the microwave oscillated from the magnetron 8 which is a microwave source is used in the rotary chamber 15.
It is for sending in. Further, the front side of the rotary chamber side wall member 16 is opened by 60 degrees, and the position opened by 60 degrees is located at the position of the square hole 5 of the cabinet 1. Furthermore, a small hole 16A is not provided at all in the wall portion 16B for 60 degrees which is adjacent to the portion on the front side of the rotary chamber side wall member 16 which is open for 60 degrees. Therefore, microwaves cannot pass through the wall portion 16B.

As best shown in FIG. 6, in the cabinet 1, further above the rear half of the upper nozzle disk 11A and below the rear half of the lower nozzle disk 11B.
A hot air chamber 3 is provided. A heater 7 is arranged in each hot air chamber 3, and a hot air fan 6 is connected to the hot air chamber 3. Furthermore, behind the rotary chamber side wall member 16 in the cabinet 1, a magnetron 8 as a microwave source is arranged. Magnetron 8
Has an antenna 14, and irradiates microwaves from the antenna 14 into the rotary chamber 15 through a small hole 16A of the rotary chamber side wall member 16.

The upper nozzle disk 11A and the lower nozzle disk 11B are for converting the hot air generated by the heater 7 and the hot air fan 6 into a hot jet.
It is made of lightweight and heat resistant material. In order to form a thermal jet with the upper nozzle disk 11A and the lower nozzle disk 11B, a large number of nozzle holes formed therein require an orifice length of a certain length. Therefore,
When the upper nozzle disk 11A and the lower nozzle disk 11B are processed by sheet metal, burring is performed to obtain a required orifice length, or in order to integrally mold, the orifice portion is thickened to form the nozzle hole. Thin the part that you do not want.

The food material 13, which is the object to be heated, is placed on the cooking table 12 and rotates, but the cooking table 12 is provided with a large number of penetrations so that the hot air from the lower side may well collide with the lower surface of the food material. Either a disc plate having holes or a mesh plate.

The width of the food inlet / outlet opening 5 at the center of the front side of the cabinet 1 is determined by the partition wall 31 of the rotary chamber 15.
It is made equal to the width dimension of one divided chamber divided by six. Further, the height dimension of the inlet / outlet port 5 is made equal to the height between the upper nozzle disk 11A and the cooking table 12. Therefore, when the loading / unloading port 5 and one of the compartments in the rotary chamber 15 coincide with each other, the food can be loaded / unloaded.

FIG. 5 shows the rotary chamber 15 and the hot air chamber 3
FIG. 6 is a perspective view showing the relationship between the heater 7, and the hot air fan 6 in an easy-to-understand manner. As shown in FIG. 5 and FIG. Both the wave heating and the hot-air jet heating) are performed at a 180-degree angle on the back side of the apparatus and not at a 180-degree angle on the front side. Therefore, the time taken for the food material 13 to make one round in the cabinet 1 by the rotation chamber 15 is twice the heat treatment time.

In the combined heating apparatus according to this embodiment, the microwaves are emitted from the outside of the cabinet 1 regardless of the angular position of the rotary chamber 15 even though the food inlet / outlet port 5 is always open. Never leak to. The maximum angle of the compartment into which the microwave enters is 240 degrees, and the microwave does not enter the front side 120 degrees. That is, the microwave is oscillated from the magnetron 8 and penetrates into the compartment on the back side of the rotary chamber 15, but when the compartment and the entrance / exit 5 overlap, the microwave penetrates into the interior by 180 degrees. . However, if this shifts, the microwave penetrates into the depth side of 240 degrees angle, but since the wall portion 16B of the rotary chamber side wall member 16 acts as a microwave blocking wall, the microwave exits from the inlet / outlet 5. There is no leakage. Thereby, the continuous heating process of the foodstuff can be performed by the microwave heating and the hot air jet heating.

FIG. 8 is a perspective view showing a rotary chamber type composite heating apparatus as another embodiment of the present invention, and FIG.
9 is a cross-sectional view taken along the line AA of FIG. 8, and FIG.
11 is a sectional view taken along the line CC of FIG. As is apparent from these figures, the structure of the composite heating device of this embodiment is almost the same as the structure of the composite heating device of the embodiment described above with reference to FIGS. 1 to 7,
The same portions are denoted by the same reference numerals in the drawings and will not be described in detail again. Hereinafter, only the points different from the embodiment of FIG. 1 will be described in detail.

FIG. 12 is a detailed perspective view showing the structure of the rotary chamber of the embodiment shown in FIG. 8. As shown in FIG. 12, the rotary chamber of the embodiment shown in FIG. Unlike the rotating chamber in the embodiment,
Upper nozzle disk 11A and lower nozzle disk 1
It does not integrally include a member such as 1B. This rotating chamber is configured such that only the cooking table 12 and the partition wall member 30 are attached to the rotating shaft 10 so that they can rotate together.

Instead of the upper nozzle disk 11A and the lower nozzle disk 11B and the rotary chamber side wall member 16 provided in the embodiment of FIG. 1, in the embodiment of FIG. 8, the nozzle as shown in the perspective view of FIG. It uses a plate and sidewall assembly. This assembly is arranged in the cabinet 1 around the rotary chamber 15 and is fixed to the cabinet 1. 14 is a plan view of the assembly of FIG. 13, and FIG. 13 is a side view thereof. As best shown in FIGS. 13, 14 and 15, this assembly includes an upper nozzle plate 18A and a lower nozzle plate 18B with side wall members 23 on both front sides between the nozzle plates. There is. These are integrally formed of a material that does not transmit microwaves. Figure 1
4, a large number of through holes are formed in the upper nozzle plate 18A and the lower nozzle plate 18B over the entire semi-circular portion on the rear side thereof.

As best shown in FIGS. 9, 10 and 11, in this embodiment, the cabinet 1 is provided with a heat insulating material 24 and the rear right side inside the cabinet 1 is provided with a waveguide. A tube 19 is provided, and the microwave generated by the magnetron 14 through the waveguide 19 is radiated from the microwave outlet 22 to the heating chamber in the rotary chamber 15. A hot air passage 20 is provided on the rear left side of the cabinet 1, and hot air generated by the heater 7 and the hot air fan 6 is sent from the hot air passage outlet 21 to the hot air chamber 3 through the hot air passage 20. Further, hot air is jetted to the heating chamber in the rotary chamber 15 through a large number of through holes of the upper nozzle plate 18A and the lower nozzle plate 18B. Furthermore, in the rear center of the cabinet 1,
An exhaust passage 25 is provided, and hot air is circulated from the heating chamber to the hot air passage 20 by the hot air fan 6 through a punching plate on the back of the heating chamber.

[0028]

According to the rotary chamber type composite heating apparatus of the present invention, since heating can be performed by using both microwave heating and hot air jet heating in combination, even a relatively thick object to be heated extends from the surface to the inside. High quality and high speed continuous heat treatment. In addition, by using a rotating chamber without using a conveyor, even with continuous heating,
The entire device can be made compact. Moreover, even though the inlet / outlet of the object to be heated is always opened, there is no risk of microwave leakage even during rotation of the heating chamber, and the heat treatment can be performed safely and continuously.

[Brief description of drawings]

FIG. 1 is a perspective view of a rotary chamber type composite heating apparatus as an embodiment of the present invention.

FIG. 2 is a diagram schematically showing an internal structure of the composite heating device of FIG.

3 is a perspective view showing a detailed structure of a rotary chamber of the combined heating apparatus of FIG.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a perspective view showing the relationship among a rotary chamber, a hot air chamber, a heater, and a hot air fan of the apparatus of FIG. 1 in an easily understandable manner.

6 is a cross-sectional view taken along the line BB of FIG.

7 is a perspective view showing details of a rotary chamber side wall member of the apparatus of FIG. 1. FIG.

FIG. 8 is a perspective view showing a rotary chamber type composite heating apparatus as another embodiment of the present invention.

9 is a cross-sectional view taken along the line AA of FIG.

10 is a sectional view taken along line BB of FIG.

FIG. 11 is a sectional view taken along line CC of FIG.

FIG. 12 is a detailed perspective view showing the configuration of the rotary chamber of the embodiment of FIG.

13 is a perspective view showing a nozzle plate and a side wall assembly in the apparatus of FIG.

FIG. 14 is a plan view of the assembly of FIG.

FIG. 15 is a side view of the assembly of FIG.

FIG. 16 is a diagram schematically showing a configuration example of a conventional conveyor type microwave heating device.

FIG. 17 is a diagram schematically showing a configuration example of a conventional batch type microwave heating device.

[Explanation of symbols]

1 cabinet 2 heating chambers 3 hot air chamber 4 preparation shelves 5 entrance / exit 6 Hot air fan 7 heater 8 magnetron 9 drive motor 10 rotating shaft 11A upper nozzle disc 11B Lower nozzle disc 12 counter 13 ingredients 14 antenna 15 rotating chambers 16 Rotating chamber side wall member 30 partition wall members 31 partition wall

Claims (6)

[Claims] 1. A cabinet provided with an inlet / outlet opening for an object to be heated, and in the cabinet, a heating chamber communicating between the inlet / outlet opening between an upper nozzle plate and a lower nozzle plate,
A hot air chamber located above the upper nozzle plate and below the lower nozzle plate is provided, and further, hot air forming means for forming hot air in the hot air chamber, and radiating microwaves to the heating chamber. A microwave source that is mounted on a rotary shaft that is rotated by a rotary drive source in the heating chamber, and is located at a level approximately midway between the upper nozzle plate and the lower nozzle plate. Is rotated together with the rotating shaft at a heated object mounting table for mounting an object to be heated, and the rotating shaft radially between the upper nozzle plate and the lower nozzle plate sandwiching the heated object mounting table. The heating chamber is extended to partition into a plurality of compartments, and a plurality of partition walls that rotate together with the rotary shaft are provided, and the partition walls transmit microwaves. Let not are formed of a material,
Further, on both sides of the entrance / exit, a shield wall is provided which allows rotation of the object mounting base and the partition wall but prevents microwaves from leaking from the entrance / exit to the outside of the cabinet at the time of these rotations. The hot-chamber from the hot-air chamber is sprayed into the heating chamber through a large number of nozzle holes provided in the upper nozzle plate and the lower nozzle plate. , 2. The rotary chamber type composite heating apparatus according to claim 1, wherein the upper nozzle plate and the lower nozzle plate are nozzle disks that rotate together with the rotary shaft. 3. The nozzle holes of the nozzle disk are formed so as to be distributed over the front surface of the nozzle disk, and the hot air chamber has a substantially semicircular shape on the side opposite to the inlet / outlet port of the nozzle disk. The rotary chamber type composite heating device according to claim 2, which is provided only on the surface. 4. The rotary chamber type composite heating device according to claim 1, wherein the upper nozzle plate and the lower nozzle plate are fixedly attached to the cabinet side. 5. The nozzle holes of the upper nozzle plate and the lower nozzle plate are formed so as to be dispersed only over a semicircular surface of the upper nozzle plate and the lower nozzle plate opposite to the inlet / outlet port. 5. The rotary chamber type composite heating device according to claim 4, wherein the hot air chamber is provided only on substantially half surfaces of the upper nozzle plate and the lower nozzle plate opposite to the inlet / outlet ports. 6. The plurality of partition walls are provided at an angular interval of 60 degrees from each other, and the width of the entrance / exit opening and the width of the shielding wall are spread by the outer ends of the adjacent partition walls. The rotary chamber type composite heating device according to claim 1, 2 or 3 or 4 or 5, which has substantially the same width.