JPH0845656A - Microwave heating device - Google Patents

Abstract

PURPOSE:To provide a microwave heating device capable of heating the whole body of an object or objects evenly whereever the device is installed. CONSTITUTION:A microwave heating device is composed of a box-shaped chamber 1, a microwave emitting means 2 to emit microwaves and cast into the cavity of the chamber 1, a turntable mechanism 3 installed inside the chamber 1, and object placing parts 11, 12 provided in the turntable mechanism 3. The turntable mechanism 3 is composed of a rotary main shaft 5 located on the axis of a supporting frame 4, a sun gear 6 installed coaxially with the main shaft 5, and planet gears 7, 8 arranged around the sun gear 6. The object placing parts 11, 12 are furnished for the respective planet gears, and a rotary reflecting body (stirrer) 30 for microwaves rotating while energized by the main shaft 5 is furnished in the space over the parts 11, 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave heating apparatus, in which a turntable is provided in a semi-sealed container, and an object to be heated on the turntable is irradiated with microwaves for heating. Regarding the device.

[0002]

2. Description of the Related Art As a microwave heating device of this type,
Conventionally, a microwave oven or one having the same principle as that of a microwave oven is relatively well known. In this case, the turntable in the hermetically sealed container is often used in a circular orbit because of its durability and cost reduction.

[0003]

However, in the above-mentioned conventional example, the object to be heated in the hermetically sealed container is simply kept to move in a circular orbit, which causes uneven irradiation and uniform heating. There was an inconvenience that it could not be done. Further, when the above-mentioned conventional example is used for a plurality of test tubes in order to shorten the reaction time of the oxygen immune reaction, it is said that each test tube (actually the internal liquid sample) cannot be heated uniformly. There was an inconvenience.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the conventional example, and in particular, to provide a microwave heating device capable of uniformly heating one or more whole objects to be heated regardless of their locations. The purpose is to provide.

[0005]

According to the present invention, a box-shaped chamber formed so as to be hermetically sealed, a microwave output means for radiating a microwave into a space inside the chamber, and a turn provided in the chamber. The table mechanism and the object-to-be-heated portion mounted on a part of the turntable mechanism are provided.

Among them, the turntable mechanism includes a support frame body fixed to a bottom portion in the chamber and having an upper opening, a rotary main shaft portion rotatably mounted on a center line of the support frame body, and a rotation main shaft portion thereof. A sun gear mounted coaxially with the main shaft,
It is configured to include a plurality of planet gears arranged around the sun gear, rotatably supported by an arm member, and urged to rotate and revolve by a rotating main shaft portion.

Further, the object-to-be-heated mounting portion is individually provided in each planetary gear, and the microwave radiating portion of the microwave output means is arranged at a predetermined position in the chamber.

Then, a rotary reflector for microwaves (stirrer) which is rotated by being urged by the main rotating shaft is installed in the chamber corresponding to the above-mentioned microwave radiating section. This aims to achieve the above-mentioned object.

[0009]

[Operation] When the entire device operates and the rotating microwave reflector (stirrer) rotates, the microwaves emitted from the microwave radiator are intermittently reflected and agitated by each fin of the microwave reflection fin mechanism. . by this,
The reflection from the inner wall of the chamber also acts to uniformize the microwave radiation to the respective object mounting portions in the space inside the chamber. At the same time, the rotation of the stirrer also agitates the air in the chamber, which further promotes the homogenization of the temperature in the chamber.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

First, in FIG. 1, reference numeral 1 indicates a box-shaped chamber which is formed so as to be hermetically sealed. The chamber 1 is provided with a microwave output means 2 for emitting a microwave to the space inside the chamber 1. The microwave output means 2 includes a microwave generation member 2A and a microwave amplification section 2B that amplifies the microwave output from the microwave generation member 2A.

Reference numeral 2C indicates a microwave radiating portion provided in the center of the upper portion of the chamber 1 in FIG. The microwave amplified by the microwave amplification section 2B is emitted from the microwave emission section 2C in the chamber 1 toward the object to be heated in the chamber 1.

A turntable mechanism 3 is installed in the chamber 1.

The turntable mechanism 3 includes a chamber 1
A support frame body 4 having a U-shaped cross-section, which is fixed to a bottom portion inside and has an upper opening, a rotary main shaft portion 5 rotatably mounted on the center line of the support frame body 4, and a rotary main shaft portion 5 of the rotary main shaft portion 5. A sun gear 6 mounted on the tip portion, and a plurality of (two in this embodiment) planetary gears 7, 8 arranged around the sun gear 6,
The planetary gears 7 and 8 are in common mesh with the support frame 4
And an internal gear 9 fixedly mounted in the opening 4A.

On the upper surface portions of the planetary gears 7 and 8, there are mounted object-to-be-heated portions 11 and 12 as turntables. The heated object placement parts 11 and 12 are for holding a plurality of test tubes T placed to obtain an oxygen immune reaction. Reference numerals 11a and 12a respectively denote mounting frames.

The planetary gears 7, 8 are rotatably mounted on the arm member 20 via fixed support shafts 7A, 8A. Further, the arm member 20 is rotatably mounted on the rotating main shaft portion 5 described above at the center thereof. Reference numeral 5A indicates a bearing. The drive motor 2 is attached to the rotary main shaft portion 5.
1 is directly connected. The rotation speed of the drive motor 21 can be freely variably set by an external operation. Reference numeral 22 indicates a support plate for the motor. Further, reference numerals 1A and 1B indicate columns for the chamber 1.

Inside the chamber 1, there is further provided a rotary reflector (stirrer) 30 for microwaves, the supporting shaft of which is supported by the rotating main shaft 5 and which rotates integrally.

The stirrer 30 is mounted on the fin support shaft 31 supported by the rotary main shaft portion 5 and coaxially planted on the rotary main shaft portion 5, and the upper end portion of the fin support shaft 31 in FIG. It is composed of a single-blade reflection fin portion 32. The reflection fin portion 32 is arranged in the space above the object-to-be-heated placing portions 11 and 12 at a predetermined distance from the object-to-be-heated placing portions 11 and 12. The stirrer 30 is adapted to rotate integrally with the rotary main shaft portion 5.

Next, the operation of the first embodiment will be described.

First, when the drive motor 21 and the microwave output means 2 are set to the operating state, the rotating main shaft portion 5 and the sun gear 6 rotate simultaneously, and the microwave radiating portion 2C directs the object to be heated in the chamber 1. Microwaves are emitted.

Further, the rotation of the sun gear 6 depends on the planetary gears 7,
8 and the planetary gears 7, 8 start rotating and revolving at the same time. That is, in FIG. 2A, when the sun gear 6 rotates in the direction of arrow A (counterclockwise), the planetary gears 7 and 8 are biased by this and rotate in the directions of arrow B (clockwise). On the other hand, since the planetary gears 7 and 8 mesh with the internal gear 9 as described above, the sun gear 6 is rotated around the sun gear 6 in the direction of arrow C (that is, in the counterclockwise direction) along the inner peripheral surface of the internal gear 9. Revolve around.

Accordingly, the object mounting portions 11, 12 on the planetary gears 7, 8 revolve around the sun gear 6 while rotating on their own axis, and therefore the plurality of test tubes T are also respectively heated. It revolves around the sun gear 6 while rotating integrally with the object rests 11 and 12 respectively.

FIG. 2B exemplifies a state immediately after the rotation and revolution of the planetary gears 7 and 8 are started.
(C) exemplifies a state in which the revolution advances by ¼ rotation. In this case, the rotational speeds and rotational speeds of the object-to-be-heated mounting portions 11, 12 for rotation and revolution are determined by the numbers of teeth of the sun gear 6, the planetary gears 7, 8 and the internal gear 9.

At the same time as the rotation of the rotating main shaft portion 5,
The stirrer 30 described above also rotates integrally with the rotating main shaft portion 5.

For this reason, the plurality of test tubes T placed on the object-to-be-heated mounting portions 11 and 12 face various positions in the chamber 1, so that the test tubes T are set in the chamber 1. The position of is continuously changed, and at the same time, the stirring and stirring action of microwaves by the stirrer 30 causes the microwaves to be uniformly reflected and propagated throughout the chamber 1.

As a result, the irradiation of microwaves in the chamber 1 is reduced as a whole, and the internal temperature is also made uniform. At the same time, the air in the chamber 1 also stirrer 30.
Since the inside of the chamber 1 is agitated, the homogenization of the internal temperature is promoted at this point as well.

FIG. 3 shows the result of the comparative experiment (temperature measurement in the chamber 1). Of these, FIG. 3 (A) shows the case without the stirrer 30, and FIG. 3 (B) shows the case with the stirrer 30.

As a result, when the stirrer 30 is installed, the temperature distribution in the chamber 1 is more uniform overall. That is, it can be seen that the microwave irradiation unevenness is smaller when the stirrer 30 is installed.

Next, a second embodiment will be described with reference to FIGS.

The second embodiment shown in FIGS. 4 to 7 shows another example of the turntable mechanism portion disclosed in the embodiment of FIG. 1 described above, and FIG. 5 shows the relationship between the sun gear, the planetary gears and the turntable, and FIG. 6 is a schematic perspective view showing the turntable portion of FIG. Further, FIG. 7 is a view showing a rotation surface of the turntable of FIG.

In FIGS. 4 to 7, the turntable mechanism 33 includes a cylindrical support frame 34 which is fixed to the center of the bottom of the chamber 1 and is open at the upper side, and an opening 34A portion of the cylindrical support frame 34. The sun gear 35 installed on the
Four planet gears 3 arranged around the sun gear 35
6, 37, 38, 39.

The four planetary gears 36 to 39 are rotatably supported by an arm member 40A. The arm member 40A is connected to and supported by a rotary main shaft portion 40 rotatably mounted on the center line of the cylindrical support frame 33. Also, the planetary gears 36 to 39 are individually equipped with turntables 41 to 44. Further, each of the planetary gears 36 to 39 is individually provided with a heating target mounting portion 50 as shown in FIG.

Reference numeral 45 represents a drive motor. The rotational force of the drive motor 45 is transmitted to the rotary main shaft portion 40 described above via the worm 45A and the worm gear 45B. Reference numeral 46 indicates a bearing.

Further, the above-mentioned arm member 40A is equipped with a cover plate 47 which rotates integrally with the revolution of each of the turntables 41 to 44. The cover plate 47 has through-holes 47A to 47 for accommodating and arranging the turntables 41 to 44 in the disposition portion of the turntables 41 to 44 described above using a disc-shaped member as a material.
Equipped with D.

Therefore, as shown in FIGS. 4 and 7, the turntables 41 to 44 and the cover plate 47 are set so that their upper surfaces are located on the same plane.
Here, reference numeral 48 indicates a fixing jig for fixing the object mounting portion. Reference numeral 1H indicates a through hole that allows the cover plate 47 to rotate.

Further, a rotating reflector (stirrer) 30 for microwaves is mounted on the rotating main shaft portion 40 as in the case of the embodiment shown in FIG. The other structure is the same as that of the first embodiment described above.

In this way as well, in addition to having the same effects as the first embodiment described above, it is possible to reduce the size as a whole because there is no need for an outer gear, and other than the turntables 41-44. It is easy to cover the place with a microwave reflection sheet or the like, and in this respect, there is an advantage that complicated equipment therefor is unnecessary and cost can be reduced.

Next, a third embodiment will be described with reference to FIG.

The third embodiment shown in FIG. 8 shows another example of the microwave rotary reflector (stirrer) disclosed in each of the embodiments shown in FIGS. 1 and 4 described above.

That is, in the third embodiment, four sets of microwave rotary reflectors (stirrers) are provided, and the four sets of microwave rotary reflectors (stirrers) 51, 52,
53 and 54 are provided with respective support shafts 51A, 52A, 53A, 5
4A through each turntable 4 of each object placement part
The feature is that it is individually planted in the central part of 1, 42, 43, 44. The other structure is the same as that of the second embodiment shown in FIG.

Even in this case, it is possible to obtain the one having substantially the same operational effect as that of the second embodiment shown in FIG.

[0042]

Since the present invention is constructed and functions as described above, according to this, uniformization of microwave irradiation to each object mounting portion is promoted by the action of the microwave rotary reflector (stirrer). At the same time, since the air inside is agitated by the microwave reflection fins, uniformization of the internal temperature inside the chamber is promoted at this point as well.
Accordingly, it is possible to provide an unprecedented excellent microwave heating device capable of uniformly and quickly heating a plurality of objects to be heated placed on each object to be heated placing section.

[Brief description of drawings]

FIG. 1 is a partially omitted schematic configuration diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the operation of the embodiment shown in FIG.

3A and 3B are diagrams showing a temperature distribution of a position where the object to be heated of the embodiment in FIG. 1 is placed, FIG. 3A shows a case without a stirrer, and FIG. 3B shows a stirrer. Shown when equipped.

FIG. 4 is a partially omitted schematic configuration diagram showing a second embodiment of the present invention.

5 is an explanatory diagram showing a positional relationship of gears in FIG. 4. FIG.

6 is a perspective view showing a stirrer portion of FIG. 4. FIG.

FIG. 7 is a plan view with a part of FIG. 4 omitted.

FIG. 8 is a perspective view showing a stirrer portion in a third embodiment of the present invention.

[Explanation of symbols]

1 Chamber 2 Microwave Output Means 3,33 Turntable Mechanism 4 Support Frame 4A Opening of Support Frame 5,40 Rotating Spindle 6 Sun Gear 7,8,36,37,38,39 Planetary Gear 11,12, 50 Heated Object Placement Part 30, 51, 52, 53, 54 Microwave Rotating Reflector (Stirrer) 34 Cylindrical Support Frame 40A Arm Member

Claims (3)

[Claims] 1. A hermetically sealed box-shaped chamber, a microwave output means for radiating a microwave into a space in the chamber, a turntable mechanism mounted in the chamber, and the turntable mechanism. In the microwave heating device, comprising: a part to be heated mounted on a part of the heating table, the turntable mechanism is fixed to a bottom part in the chamber, and a support frame body having an upper opening is formed; A structure including a rotating main shaft portion rotatably mounted on the center line of the support frame, a sun gear coaxially mounted on the rotating main shaft portion, and a plurality of planet gears arranged around the sun gear. And, each of the planetary gears is individually equipped with the object-to-be-heated mounting portion, and a microwave radiating portion of the microwave output means is provided at a predetermined position in the chamber, and the rotating main shaft portion is provided. A microwave heating apparatus comprising: a microwave rotating reflector that is biased and rotated in a manner corresponding to the microwave radiating portion in the chamber. 2. The microwave heating apparatus according to claim 1, wherein the microwave rotary reflector is provided on the rotary main shaft portion via a supporting shaft portion thereof. 3. A plurality of the rotary reflectors for microwaves are provided, and the rotary reflectors for microwaves are individually provided to the turntables of the plurality of planetary gear portions via the respective support shaft portions. The microwave heating device according to claim 1, wherein the microwave heating device is provided.