JPH022277B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microwave irradiation device, and more particularly to a microwave irradiation device having a plurality of rotating shelves for placing objects to be irradiated with microwaves.

[Prior art]

2. Description of the Related Art Microwave irradiation devices, also known as microwave ovens, are used to thaw foods and other items by generating heat using microwaves. This microwave irradiation device normally places the object to be heated or heated in a microwave irradiation chamber configured to prevent microwaves from leaking outside, and then irradiates the object with microwaves emitted by a microwave oscillator. It is designed to irradiate. At that time, the object to be irradiated is usually placed on a horizontal rotating plate that rotates at a constant speed, and is often devised so that it is evenly irradiated with microwaves.

[Problem that the invention seeks to solve]

However, the method of providing such a horizontal rotating plate in the microwave irradiation chamber has a problem in that the amount of objects to be irradiated that can be placed is limited by the size of the rotating plate. In other words, it is suitable for household use where only a small amount of food needs to be heated or heated, but for commercial use such as food processing factories, restaurants, and school lunch centers, large amounts of food must be efficiently processed at once. Therefore, it is necessary to install a large number of microwave irradiation devices or to install a device containing a large rotating plate. However, it is not economical to prepare a large number of devices, and if the rotating plate is made larger, not only will the flat area of the microwave irradiation chamber become larger, but the height will also increase to irradiate a wider area with microwaves. Therefore, there was a problem that space efficiency was significantly reduced.

In order to solve this problem, it may be possible to stack a large number of horizontal rotating plates in multiple stages at intervals and rotate them coaxially, but this would result in differences in the degree of microwave irradiation between the upper and lower rotating plates. A new problem arises, and it cannot be a fundamental solution.

Therefore, there has been a strong desire for a space-efficient microwave irradiation device that can uniformly irradiate a large amount of objects with microwaves at once.

[Means for solving problems]

It is an object of the present invention to provide a microwave irradiation device that solves the problems of the conventional microwave irradiation device and is suitable for large-scale processing with good space efficiency.

Such a microwave irradiation device of the present invention includes a microwave irradiation chamber, a microwave irradiation section provided on the ceiling of the chamber, and a microwave irradiation section provided below the irradiation section and rotatable about a horizontal rotation axis. The rotating shelf is equipped with a rotary shelf holder which is shaped like a rotary shelf, and a plurality of rotating shelves for placing objects to be irradiated with microwaves. It is characterized in that it is always suspended from the shelf support while maintaining a constant posture.

According to a preferred embodiment of the present invention, the microwave irradiation unit has a microwave irradiation port opened in the ceiling, and the microwave radiated from a microwave oscillator installed outside the microwave irradiation chamber is transmitted through a conduit. It is designed to lead to the irradiation port. By doing this, it is possible to use the space inside the microwave irradiation chamber more effectively, and a heavy microwave oscillator can be installed in the lower part of the irradiation chamber outside, making the device more stable and smaller. It is effective for

[Examples and effects]

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a side sectional view showing an example of the microwave irradiation device of the present invention, FIG. 2 is a plan view of the device in the direction shown by arrows in FIG. 1, and FIG. 3 is a front view in the direction shown by arrows in FIG. It is a diagram. A microwave irradiation unit 3 is provided on the ceiling 2 of the microwave irradiation chamber 1, and the microwave irradiation unit 3 includes a microwave irradiation port 4 and a star fan 5 for scattering the microwaves irradiated into the room from the microwave irradiation port 4. It's summery. Starafan 5 is the second
As shown in the figure, it has four stirring blades 6 made of a material that reflects microwaves, such as aluminum, and a motor 7 for rotating them. Two microwave oscillators 8 are installed outside and below the microwave irradiation chamber 1, and the microwaves emitted from the oscillators 8 rise up through a waveguide 9 made of a material such as aluminum, and each It is guided to the microwave irradiation port 4. 10 is a control box for adjusting the output of the microwave oscillator 8. Further, it is not necessarily necessary to provide two microwave oscillators 8, and one microwave oscillator 8 may be used for the same purpose.

A rotating shelf holder 11 is provided below the microwave irradiation unit 3 and is rotatable about a horizontal rotation axis, and a plurality of rotating shelves 12 are suspended from the shelf holder 11.

FIG. 4 is a schematic perspective view for explaining the structure and mutual relationship of the rotary shelf holder 11 and the rotary shelf 12, and the rotary shelf 12 is omitted and only two are shown. In the figure, the rotating shelf support 11 is composed of a pair of circular side plates 13 and a drive shaft 14 connecting the centers of the side plates 13, and the rotation of a separately provided motor (not shown) is driven by a sprocket 15,
The power is transmitted to the chain 16 and sprocket 17 to rotate the drive shaft 14 at a predetermined speed. On the other hand, the rotating shelf 12 includes a shaft 18 rotatably supported between the side plates 13, a pair of fan plates 19 connected to both ends of the shaft, and a shelf 20 installed between the fan plates 19. has been done.

Since the rotating shelf 12 is mounted so that the fan plate 19 and the shelf 20 are suspended from the shaft 18, the rotating shelf holder 1
Even if the shelf 20 rotates, it always maintains a constant posture due to its gravity, that is, the shelf 20 is always maintained horizontally, so that the items placed on it do not fall.
It is designed to be suspended from 1.

Further, in order to maintain the rotary shelf 12 in a constant posture, the shaft 18 is rotatably supported on the side plate 13, but the shaft 18 is fixed to the side plate 13, and the fan plate 19 is fixed to the side plate 13.
may be rotatably supported on the shaft 18.

The rotary shelf 12 revolves around a horizontal drive shaft 14 on a constant circular trajectory by the rotation of the rotary shelf support 11. A rotary cam means or the like is provided at one end of the drive shaft 14, and the shaft 14 is rotated and rotated. By making the rotary shelf 12 swing forward and backward in the axial direction, a similar axial swing can be applied to the rotating shelf 12 as well. By doing so, the object to be irradiated can be more evenly irradiated with microwaves.

The material of each element constituting the rotating shelf holder 11 and the rotating shelf 12 is not particularly limited as long as it is heat resistant and has a certain strength, but fluorine resins such as Teflon do not absorb microwaves. preferable.

In FIGS. 1 to 3, a door 21 is provided at the front of the microwave irradiation chamber 1, and can be opened and closed by turning it with a handle 22. The wall material of the microwave irradiation chamber 1 is usually made of a heat insulating material, for example, a foam made of glass wool or urethane sandwiched with a structural material, and the same material can be used for the door 21 as well. However, it is preferable that the surface of the door 21 be covered with a metal plate, such as stainless steel, to prevent microwaves from leaking from the front surface. Further, a window 23 for observing the inside is provided in the center of the door 21, and it is preferable that this window also be covered with a metal screen to prevent microwave leakage.

The microwave irradiation chamber 1 is housed in a metal outer box 24, and is designed to more completely block microwave leakage to the outside. Furthermore, a cooling device 25 such as a refrigerator is housed within the outer box 24. The cooling device 25 is provided to prevent the temperature inside the microwave irradiation chamber 1 from rising and to control the temperature to a constant level, but may not be provided depending on the purpose.

A power supply section 2 connected to the bottom of the outer box 24
The microwave oscillator 8 and its control box 10 described above are housed inside the microwave oscillator 6 . Furthermore, an operation panel 27 is provided above the power supply section 26 and in contact with the outer box 24, and various operations and controls of the microwave irradiation device are performed here.

Next, to explain the operation of the apparatus shown in FIGS. 1 to 3, first, the front door 21 of the microwave irradiation chamber 1
is opened, and an object to be irradiated with microwaves, for example, food to be thawed, is placed on the rotating shelf 12. At that time, operation panel 2
The rotary shelf holder drive switch provided at 7
A convenient method is to rotate the rotating shelf holder 11 in a step-like manner and place the unmounted rotating shelves 12 while moving them one after another toward the door. However, by appropriately designing the spacing between the rotary shelves, it is also possible to directly place the object to be irradiated by hand. After the placement is completed, the door 21 is closed and the start switch on the operation panel 27 is pressed to start the microwave oscillator 8 and the Tarafuan 5 and rotate the rotary shelf holder 11. As a result, microwave irradiation is performed, and during the irradiation, the temperature inside the microwave irradiation chamber 1 is controlled to be constant by the cooling device 25.

The microwaves emitted from the two microwave oscillators 8 pass through waveguides 9 and are irradiated into the microwave irradiation chamber 1 from the ends thereof, that is, the microwave irradiation ports 4 opened in the ceiling 2 of the microwave irradiation chamber 1. However,
At this time, the microwaves are scattered by the starvation fan 5 and are made uniform. The object to be irradiated is slowly rotated within the chamber by the rotary shelf 12 around the horizontal axis of rotation at a constant rotational speed, so that it is evenly irradiated with the microwaves from above.

Next, when a predetermined irradiation time has elapsed, the microwave irradiation is stopped by a stop switch provided on the operation panel 27 or by a timer. Subsequently, the door 21 may be opened and the object to be illuminated inside may be taken out.

〔Effect of the invention〕

The microwave irradiation device of the present invention includes a microwave irradiation unit provided on the ceiling of the microwave irradiation chamber, and a rotating shelf that is rotated about a horizontal axis of rotation below the microwave irradiation unit, and the rotating shelf is rotated in the direction of gravity. Since the device is designed to rotate and move while always maintaining a constant posture, it is a space-efficient and compact device that can uniformly and evenly irradiate a large amount of microwave irradiated objects at once. be able to. In addition, the object to be irradiated can be easily taken in and taken out of the rotating shelf, resulting in good operability.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an example of the microwave irradiation device of the present invention, and FIGS.
FIG. 4 is a schematic perspective view for explaining the structure and mutual relationship of the rotary shelf holder 11 and the rotary shelf 12. 1...Microwave irradiation room, 2...Ceiling, 3...
...Microwave irradiation part, 4...Microwave irradiation port,
5... Starfish fan, 6... Stirring blade, 7... Motor, 8... Microwave oscillator, 9... Waveguide, 1
0... Control box, 11... Rotating shelf support, 12... Rotating shelf, 13... Side plate, 14... Drive shaft, 15... Sprocket, 16... Chain, 17... Sprocket, 18... Shaft , 19...
... door plate, 20 ... shelf, 21 ... door, 22 ... handle, 23 ... window, 24 ... outer box, 25 ... cooling device, 26 ... power supply section, 27 ... operation panel.

Claims (1)

[Claims] 1. A microwave irradiation chamber 1, a microwave irradiation section 3 provided on the ceiling 2 of the chamber 1, and a microwave irradiation section 3 provided below the irradiation section 3 and rotatable about a horizontal rotation axis. The rotary shelf 12 is equipped with a rotating shelf holder 11 which is shaped like a rotary rack, and a plurality of rotating shelves 12 for placing objects to be irradiated with microwaves. A microwave irradiation device characterized in that it is suspended from the shelf support portion 11 while always maintaining a constant posture with respect to a direction. 2. The microwave irradiation unit 3 has a microwave irradiation port 4 opened in the ceiling 2, and the microwave irradiation chamber 1
The microwave irradiation device according to claim 1, wherein the microwave radiated from an externally provided microwave oscillator 8 is guided to the irradiation port 4 through a waveguide 9.