JPH05256456A - Complex type heating treatment device - Google Patents

Abstract

PURPOSE:To efficiently utilize a heating chamber by absorbing a part of a protrusion formed in the heating chamber by a microwave leakage prevention means using an air force generating means. CONSTITUTION:A recess is formed at the rear of a fan 22 as an air force generating means, i.e., in the middle of a fan base plate 44, in which recess a lambda/4 choke 29, as a microwave leakage prevention means, is included. The performance of the fan 22 is not lowered by the recess. By driving the fan 22, a part of a protrusion produced in a heating chamber 2 is absorbed by the choke 29. As a result, the heating chamber 2 can be utilized efficiently.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a heat treatment apparatus. More specifically, the present invention relates to an improved heat treatment device that effectively utilizes a heating chamber in a combined heat treatment device that uses both microwave heating and hot air heating.

[0002]

2. Description of the Related Art FIGS. 1 to 3 show a prior art. These figures show the internal structure of the conventional heat treatment apparatus from the left side. Microwaves and hot air are used together in the heating operation of this heat treatment apparatus. The microwave used for microwave heating is generated by the microwave oscillating device 3 in the upper part of the main body case 1, and then sent to the cooking space 7 through the introducing pipe 5. Here, the cooking space 7 refers to a space on the turntable 13 side in the space of the heating chamber 2 divided by the heating chamber partition plate 6. On the other hand, the hot air used for hot air heating is the fan 1
1. Heat from the heater 9 wound on the outside of the unit 1 and the fan 11
It is generated by the wind force generated by the rotation of and is sent to the cooking space 7 like the microwave.

The rotation of the fan 11 required to generate hot air depends on the rotational torque generated by the fan motor 21.
The fan motor 21 is fixed on the fan motor support 23 outside the heating chamber 2. The torque generated by the fan motor 21 is then transmitted to the fan 11 inside the heating chamber. Transmission is via a metal rotating shaft 27. Although there is a risk that heat from the metal rotating shaft 27 damages the motor 21, a cooling fan 31 is provided in front of the fan motor 21 to prevent this.

A through hole is provided in the heating chamber 2 in order to penetrate the metal rotating shaft 27. The through hole is necessary for transmitting torque, but there is a risk that radio waves may leak to the outside of the heating chamber 2 from this through hole. In order to prevent this, a λ / 4 choke 29 or a cylindrical space 28 is provided between the fan 11 and the fan motor 21. The λ / 4 choke 29 may be attached on the back surface 25 inside the heating chamber or outside the heating chamber. The one provided inside is shown in Figure 1.
The one provided outside is shown in FIG.

As described above, so-called combined heating is performed by using the microwave and hot air generating means together. An object to be heated (not shown) is placed on the turntable 13 provided in the lower part of the heating chamber 2. The turntable 13 rotates the object to be heated during the heat treatment. The torque required for rotation is generated in the turntable motor 15 and then transmitted to the turntable support 19 via the gear box 17 and the like, and used for rotating the turntable 13.

[0006]

The heat treatment apparatus described above has the following drawbacks. First, the λ / 4 choke 29 makes it difficult to reduce the size of the entire device. As shown, the λ / 4 choke 29 has a considerable size and causes a considerable protrusion inside the heating chamber 2. The heating chamber 2 or the cooking space 7 in the heating chamber 2 is unduly narrowed by this protrusion, and as a result, miniaturization of the device is hindered.

As a means for solving this, a method as shown in FIG. 3 can be considered. In this case, a flat cylindrical space 28 is used instead of the λ / 4 choke 29. However, since this cylindrical space is not clearly defined as λ / 4, the function as a choke cannot be sufficiently exhibited in such a cylindrical space. Further, it is not easy to determine this shape, and therefore it is difficult to substitute the λ / 4 choke 29. Therefore, the method shown in FIG. 3 cannot solve the problem.

Second, the output of the fan motor 21 must be suppressed. This is a λ / 4 choke 2
This is a problem that occurs only when 9 is provided outside the heating chamber 2 (see FIG. 2). When the λ / 4 choke 29 is provided outside the heating chamber, the space between the main body case back plate 33 and the heating chamber back plate 25 becomes narrow. Therefore, it becomes necessary to suppress the output of the fan motor 21, which is disadvantageous in using the fan motor 21 as compared with the case where the fan motor 21 is provided inside the heating chamber 2.

[0009]

A heat treatment apparatus according to the present invention comprises a heating chamber, microwave generating means for supplying microwaves to the heating chamber, and a wind power generating drive source provided outside the heating chamber. Driving force transmission means for transmitting the driving force from the wind power generating drive source to the inside of the heating chamber through the penetrating portion provided on the wall surface of the heating chamber, and the driving force transmitted to the inside of the heating chamber by this driving force transmission device. A wind force generating means for generating hot air in cooperation with the heat generating means, and a microwave leakage preventing means provided in the vicinity of the through portion of the heating chamber for preventing microwaves from leaking to the outside of the heating chamber. Prepare According to the present invention, in such a device, the microwave leakage preventing means is provided with the wind force generating means so as to absorb at least a part of the protruding portion generated in the heating chamber.

Further, according to one embodiment of the present invention, the above-mentioned wind force generating means has a form in which a microwave leakage preventing means is incorporated therein.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a composite heat treatment apparatus that uses microwaves and hot air in combination. A heating chamber for performing these heat treatments is provided inside the device. The microwave required for microwave heating is generated by the microwave generation means, and the hot air required for hot air heating is generated by the two means, the heat generation means and the wind force generation means, and then sent to the inside of the heating chamber.

The wind force generating means used for generating hot air is driven by receiving a driving force from a wind force generating drive source. Since the wind power generation means and the wind power generation drive source are respectively provided inside the heating chamber and outside the heating chamber, means for transmitting the driving force from the outside of the heating chamber to the inside is required. A driving force transmitting means is provided for transmitting the driving force. The driving force transmitting means transmits the driving force from the outside of the heating chamber to the inside of the heating chamber through the through hole provided in the wall surface of the heating chamber.

The penetrating portion is thus provided for the transmission of the driving force by the driving force transmitting means, but it causes a risk of external leakage of microwaves. To eliminate this danger, microwave leakage prevention means is provided near the penetration. Microwave leakage prevention means is indispensable for the heat treatment apparatus having the configuration as in the present invention.

The microwave leakage prevention means is mounted inside the heating chamber. This is because the output of the drive source for wind power generation is suppressed when it is outside the heating chamber. However, when mounted inside the heating chamber in this way, the microwave leakage prevention means causes a considerable protrusion inside the heating chamber, so that the heating chamber is unduly narrowed and further miniaturization of the entire apparatus is hindered. New problems arise.

As a means for solving this problem, a method of directly changing the microwave leakage prevention means can be considered. However, in order to fully exert the function of the microwave leakage prevention means, it is not appropriate to make such a change, and it is generally difficult. For this reason, in the device of the present invention, the wind force generating means is improved. That is, at least a part of the protruding portion generated inside the heating chamber by the microwave leakage preventing means is absorbed by the improved wind force generating means according to the present invention. As a result, the heating chamber can be used more widely and the size of the entire apparatus can be reduced.

[0016]

EXAMPLE A heat treatment apparatus according to the present invention will be described with reference to FIGS. 4 is a perspective view of the heat treatment apparatus according to the present invention, FIG. 5 is a vertical sectional view taken along line I-I in FIG. 4, FIG. 6 is a horizontal sectional view taken along line II-II, and FIG. 7 is a fan and λ / FIG. 4 is an enlarged view of around 4 chokes.

The heat treatment apparatus according to the present invention is a so-called hot air heat treatment apparatus which uses microwaves and hot air together.
The microwave and hot air heating are performed inside the heating chamber 2 provided on the heating chamber support legs 4 inside the apparatus. An object to be heated (not shown) is placed on a turntable 13 provided below the heating chamber 2. Turntable 13 during heat treatment
Rotates. The torque required to rotate the turntable 13 is generated by the turntable drive motor 15 fixed to the turntable fixing base 8. The torque generated by the motor 15 is then transmitted to the turntable support 19 by the turntable drive shaft 18 in the gearbox 17 and the like, thereby rotating the turntable 13. By rotating the turntable 13,
The heat treatment work is made more effective.

The microwave required for microwave heating is generated in the microwave oscillating device 3 and then supplied into the heating chamber 2 through the waveguide 5. On the other hand, the hot air required for heating the hot air is the fan 2 according to the present invention used as a wind force generating means.
2 and a heater 9 used as a heat generating means, and sent to the inside of the heating chamber 2 similarly to the microwave. The fan 22 and the heater 9 are provided inside the heating chamber 2.

The torque required to rotate the fan 22 is generated by the fan motor 21 used as a wind power generation drive source. As you can see from the figure, the fan motor 21
It is provided outside the heating chamber 2. Therefore, a means for transmitting torque to the fan 22 provided inside the heating chamber 2 is required. The fan shaft 27 is used for torque transmission.
Is used. The fan shaft 27 transmits torque to the fan 22 inside the heating chamber 2 through a penetrating portion provided on the wall surface of the heating chamber 2. A cooling fan 31 for preventing heat is provided at the front of the fan motor 21. Thus, the penetrating portion provided on the wall surface of the heating chamber 2 is
Although necessary for the transmission of torque, this creates the risk of microwave external leakage.

As a means for preventing microwave leakage, λ / 4
Chalk 29 is essential. The attachment position of the λ / 4 choke 29 is inside the heating chamber 2. This is because if it is provided outside, the output of the fan motor 21 will be suppressed. However, when this is provided inside, a new problem arises that the heating chamber 2 is narrowed by the protruding portion by the λ / 4 choke 29. It is desirable to set the choke 29 to λ / 4 for the reason that the function of the choke 29 is sufficiently exhibited,
Therefore, it is difficult to change the form. In the present invention, for this reason, the choke 29 is not changed,
The form of the fan 22 has been improved.

An enlarged view of the fan 22 according to the present invention and its peripheral portion is shown in FIG. As is apparent from FIG. 7, the fan 22 according to the present invention is configured so as to absorb at least a part of the protruding portion generated inside the heating chamber 2 by the λ / 4 choke 29. For this reason, the problem that the heating chamber 2 is narrowed by the choke 29 and the size reduction of the device is prevented is solved.

The disadvantage of the conventional device is that the fan having the above-mentioned characteristics can achieve its purpose. Therefore, FIGS.
The fan 22 according to the invention shown in FIG. 1 should be considered as merely one aspect of a fan having such a configuration. The fan 22 used as an embodiment of the present invention has a flat cylindrical shape. A recess is provided in the rear surface of the fan 22, that is, the center of the fan base plate 44, and the λ / 4 choke 29 can be included in the recess. It should be noted that the fan performance does not deteriorate due to this recess. A hole is provided at a central position of the hollow portion so that the fan shaft 27 can pass therethrough. The end portion of the fan shaft 27 is fixed to the inner wall surface of the fan base plate 44, and the torque from the fan motor 21 can be transmitted. Further, some fan blades 42 are provided on the outer periphery of the fan 22. The air in the heating chamber 2 is taken into the inside of the fan 22 from the front part by the action of the fan blades 42. After that, this air is discharged from the side surface portion and receives heat from the heater 9 to be turned into hot air.

[0023]

According to the present invention, there is provided a heat treatment apparatus for effectively utilizing the heating chamber, and as a result, the size of the entire apparatus can be reduced. Further, since the fan output required for hot air heating can be increased, it is effective when the fan output needs to be increased even a little.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional heat treatment apparatus in which a λ / 4 choke is provided inside a heating chamber.

FIG. 2 is a diagram showing a conventional heat treatment apparatus in which a λ / 4 choke is provided outside the heating chamber.

FIG. 3 is a diagram showing a heat treatment apparatus using a cylindrical space instead of a λ / 4 choke.

FIG. 4 is a perspective view of a device according to the present invention.

FIG. 5 is a vertical cross-sectional view of a device according to the present invention.

FIG. 6 is a horizontal sectional view of a device according to the present invention.

FIG. 7 is an enlarged view of a peripheral portion of a fan.

[Explanation of symbols]

 1 Main Body Case 2 Heating Chamber 3 Microwave Oscillator 4 Heating Chamber Supporting Leg 5 Waveguide 6 Heating Chamber Partition Plate 7 Cooking Space 9 Heater 11 Fan 13 Turntable 15 Turntable Motor 17 Gear Box 18 Turntable Drive Shaft 19 Turntable Support 21 Fan motor 22 Fan 23 Fan motor support 25 Heating chamber back plate 27 Fan shaft 29 λ / 4 choke 31 Cooling fan 33 Body case back plate 42 Fan blades 44 Fan base plate

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[Procedure amendment]

[Submission date] March 26, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (2)

[Claims] 1. A composite heat treatment apparatus using both microwave heating and hot air heating, a heating chamber, a microwave generator for supplying microwaves to the heating chamber, and a wind generator provided outside the heating chamber. Drive source, drive force transmitting means for transmitting the drive force from the wind power generating drive source to the inside of the heating chamber through a penetrating portion provided on the wall surface of the heating chamber, and to the inside of the heating chamber by the driving force transmitting device. The microwave leakage is provided by a wind force generation unit that acts on the transmitted driving force and that generates hot air in cooperation with the heat generation unit, and a microwave leakage prevention unit that is provided in the vicinity of the through portion of the heating chamber. A composite heat treatment apparatus, wherein the wind force generating means is formed so as to absorb at least a part of the protruding portion generated inside the heating chamber by the prevention means. 2. The heat treatment apparatus according to claim 1,
A composite heat treatment device formed so that the microwave leakage prevention means is incorporated inside the wind force generation means.