JPS6336634Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Technical Field of the Invention] The present invention relates to a starvation fan for a high-frequency heating device, and more particularly to a starburan for a high-frequency heating device that allows for improved assemblability. [Technical background of the invention] Fig. 1 shows a starvation fan of a conventional high-frequency heating device.The starvation fan 1 has a plurality of blades 2 arranged radially, and a hole 3 in the center. It is provided. A hub 5 having a cylindrical shape and having an outwardly extending flange 4 surrounding the hub 5 is fitted into the hole 3, and the starch fan 1 is fixed to the flange 4 by screws, rivets, or the like. Further, on the lower surface of the main body upper plate 6 of the high-frequency heating device, a shaft 7 having a step in the middle and a smaller diameter at the lower part is fixed by a set screw 8 from the upper surface side of the upper plate 6, engaging the hub 5 with the small diameter portion of the shaft 7;
A stopper 9 is provided at the lower end of the shaft 7 to prevent the starch fan 1 from falling off. An internal partition plate 10 of the high-frequency heating device is arranged below the starvation fan 1. In the above mechanism, a high-frequency electric field generated from a magnetron (not shown) provided inside the main body is stirred by a starvation fan 1 rotated by wind power, and uniform radio waves are supplied to the inside of the high-frequency heating device. Therefore, uneven heating can be improved and cooking performance can be improved. [Problems with the background art] In the case of the above-mentioned mechanism, assembly is performed in the order of attaching the shaft 7 to the upper plate 6, attaching the starch fan 1 to the shaft 7 from the inside, and then attaching the partition plate 10. It is. Therefore,
This method has the disadvantage that there are many assembly steps and assembly work efficiency is low. Furthermore, due to variations in the flatness of the upper plate 6, the starvation fan 1 and the partition plate 10 may come into contact with each other, and in order to prevent this, the upper plate must be processed with high precision, and the presence or absence of contact must be confirmed. The disadvantage is that it is difficult to [Purpose of the invention] The present invention has been made in view of the above-mentioned drawbacks, and the object is to provide a starvation fan for a high-frequency heating device that is easy to assemble and allows easy checking of the assembled state. be. [Summary of the invention] In order to achieve the above object, the starvation fan of the high-frequency heating device according to the present invention includes an upper plate of the high-frequency heating device,
In the starvation fan of a high-frequency heating device, the starvation fan is rotatably attached to a shaft disposed in a space between the partition plate and the partition plate provided inside the device, and the shaft is attached to the upper surface side of the partition plate. The starch fan is integrally formed, and the starch fan is attached to the shaft externally. [Embodiment of the invention] Hereinafter, an embodiment of the invention will be described with reference to FIGS. 2 to 10, and the same parts as those in FIG. FIG. 2 shows an embodiment of the present invention, in which a shaft 7 is integrally formed on the upper surface side of the partition plate 10, and the hub 5 of the starch fan 1 is engaged from above the shaft 7, and the shaft After the stopper 9 is fixed to the upper end of the partition plate 7, the partition plate 10 is installed inside the high-frequency heating device. Therefore, since the starvation fan 1 and the like are assembled outside the device, and the installation work of the shaft 7 is not required, ease of assembly is improved. It becomes possible to easily check the presence or absence of contact with item 1. Figure 3 shows another embodiment of the present invention.
The shaft 7 is made of a material with higher heat and wear resistance than the material of the partition plate 10, such as PPS, and the shaft 7 is integrally formed with an insert when forming the partition plate 10. It is. Therefore, in this embodiment, the durability of the shaft 7 portion can be improved, and the reliability of the product is improved. Further, FIG. 4 shows still another embodiment of the present invention, in which a partition plate 10 of the mounting portion of the shaft 7 is shown.
The thickness of the shaft 7 is increased.
A cavity 11 that opens toward the lower surface of the partition plate 10 is provided inside the partition plate 10 . This cavity 11 is formed when the partition plate 10 and the shaft 7 are integrally formed.
It functions as a meat release hole to prevent the meat from shrinking in the shaft 7 portion. Therefore, it is possible to finish the surface of the shaft 7 smoothly, and by forming the partition plate 10 with a thick wall, the strength of the shaft attachment portion can be increased. FIG. 5 shows another embodiment of the present invention, in which the shaft of the embodiment shown in FIG. ing. In the star fan shown in Fig. 2, the partition plate 1 is used when cleaning the inside of the high-frequency heating device.
When upward pressure is applied to 0, the partition plate 10
may be deformed due to deflection, etc., and the starvation fan 1 may come into contact with the upper plate 6 and be deformed, and the partition plate 10
There is a risk that the shaft 7 will run out due to rattling or vibrations during rotation of the starvation fan 1, causing unstable rotation of the starvation fan 1 such as contact of the starvation fan 1 with the upper plate 6. In this embodiment, since the shaft 7 is in contact with the upper plate 6, the partition plate 10 is not deformed, and by preventing the partition plate 10 from deforming, the starvation space between the upper plate 6 and the partition plate 10 is reduced. is ensured,
Therefore, the starvation fan 1 is prevented from coming into contact with the upper plate. Although the runout of the shaft 7 is also reduced in this embodiment, means for further preventing runout are shown in FIGS. 6 and 7. In FIG. 6, a recess 12 is provided in the shaft abutting portion of the inner surface of the upper plate 6, and the upper end of the shaft 7 is placed in the recess 1.
2, FIG. 7 shows that a conical locking protrusion 13 that protrudes downward is provided on the inner surface of the upper plate 6 at the shaft abutting portion, and the upper end surface of the shaft 7 is provided with a conical locking protrusion 13 for engaging the shaft 7. A locking recess 14 that engages with the locking projection 13
is provided, and the locking protrusion 13 is provided with the locking recess 1
4 is engaged. Therefore, due to the engagement between the shaft 7 and the upper plate 6, the shaft 7 can be prevented from wobbling, and stable rotation of the starch fan 1 can be obtained at all times. As a result, the radio wave distribution performance is further improved. Further, FIGS. 8 to 10 show other embodiments of the present invention, and FIGS. 8 and 9 show a metal reinforcing member 15 having an L-shaped cross section on the top surface of the partition plate 10. The positions are symmetrical about shaft 7, and the distance between them is λ/2 (λ is the wavelength of free space and is approximately
122mm) and fixed by welding.
Further, in FIG. 10, the reinforcing plates 15 are welded and fixed at symmetrical positions in the front-rear direction, with a spacing of λ/2. Normally, a reflector plate is attached near the magnetron in order to make the microwaves uniform, but the electric field concentrates on the screws used for attaching the reflector plate, causing sparks. In this embodiment, the reinforcing plate 1
5 functions as a reflector and does not use screws or the like, it is possible to prevent concentration of electric fields, to make the microwaves uniform, and to improve uneven heating. Further, when the device is misused, the partition plate 10 tends to be thermally deformed due to microwaves, but the reinforcing plate 15 provides rigidity to the partition plate 10 and can prevent such thermal deformation. Experimental results comparing the temperature distribution and cooking quality of the high-frequency heating device according to this example with those of the conventional device are shown below.

[Effect of idea]

As described above, the starvation fan of the high-frequency heating device according to the present invention is constructed by integrally forming the shaft on which the starvation fan is rotatably mounted on the upper surface side of the partition plate provided inside the high-frequency heating device. Since the star fan was assembled outside before installing the partition plate inside the device, this assembly work was made very easy.
Since the shaft installation work is omitted, assembly efficiency can be greatly increased. Furthermore, it is possible to easily check the rotational state of the starch fan and the contact state with the partition plate from the outside, which has the effect of increasing reliability when the product is completed. Furthermore, by integrally forming the shaft on the upper surface side of the partition plate and having its upper end abut against the lower surface of the upper plate, vibration of the shaft and deformation of the partition plate can be prevented. Therefore, it is possible to secure a sufficient space for the star lugs between the upper plate and the partition plate, and it is possible to prevent problems such as the star lugs coming into contact with the upper plate.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing a starvation fan of a conventional high-frequency heating device, and Figs. 2 to 10 show embodiments of the present invention. The figures are respectively front sectional views, Figures 3 and 4 are enlarged sectional views of the shaft portion, and Figure 8 is an enlarged sectional view of the shaft portion.
10 are plan views of the partition plate portion, and FIG. 9 is a front sectional view of FIG. 8. DESCRIPTION OF SYMBOLS 1... Starfish fan, 2... Blade part, 3... Hole part, 4... Flange, 5... Hub, 6... Top plate,
7... Shaft, 8... Fixing screw, 9... Stopper, 10... Partition plate, 11... Hollow part, 12...
Recess, 13... Locking protrusion, 14... Locking recess, 1
5...Reinforcement plate.

Claims (1)

[Claims for Utility Model Registration] 1. A high-frequency heating device in which a starvation fan is rotatably attached to a shaft arranged in a space between the upper plate of a high-frequency heating device and a partition plate provided inside the device. In the star fan of the heating device, the shaft is integrally formed on the upper surface side of the partition plate, an uneven portion is further formed on the upper plate, and the upper end of the shaft is engaged with the uneven portion. Starafan is a high-frequency heating device. 2. A starvation fan for a high-frequency heating device according to claim 1, wherein the shaft is made of a material having higher heat resistance and wear resistance than the material of the partition plate.