JPS5838555Y2 - High frequency heating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a high-frequency heating device having a structure in which radio waves are stirred by stirrer blades.The purpose of the present invention is to improve the radio wave stirring ability of the stirrer blades and to reduce uneven heating of objects to be heated. An object of the present invention is to provide a high-frequency heating device that can prevent such damage.

Conventionally, in order to prevent uneven heating caused by uneven radio waves, there is a method of rotating the stirrer blades using wind generated by a blower, but in this method, wind is the power source, so due to the difference in the way the stirrer blades are installed, Sometimes the machine would not rotate, or even if it was rotating, it would stop midway.

This is extremely inconvenient, as it not only fails to prevent uneven heating of the object to be heated, which is the original purpose of the stirrer, but also causes problems such as a reduction in high frequency output and burnout of the stirrer blade structure itself due to concentration of the electric field. there were.

Therefore, if a part of the shaft of the stirrer blade is made of ferromagnetic material and the entire stirrer blade is suspended by a magnet, the frictional resistance generated at the stirrer blade mounting part is extremely small, so the stirrer blade may not rotate or rotate slowly. There will be nothing left to do.

Furthermore, even in a state where the supply voltage is extremely low and the blower is unable to generate a large amount of air, the radio wave agitation ability, which is the original purpose of the Starr Hane, will not be reduced.

However, it is nearly impossible to uniformly heat the object using only the stirrer blades, and in order to achieve even more uniform heating, it is necessary to rotate the plate on which the object is placed, or rotate the object with the stirrer blades. Some also use plates.

However, the provision of a rotating plate and the like has resulted in a significant increase in cost and serious quality problems.

Therefore, the present invention is a radio wave stirring device in which a stirrer is suspended by a magnet, and by moving the magnet, the rotating stirrer itself is moved, thereby providing a higher performance and cheaper radio wave stirring device.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows a high-frequency heating device that stirs radio waves using a very common stirrer. Radio waves are oscillated in the heating chamber 1 with the door 2 closed, and stirred by the stirrer 3 to heat the object 4. It is designed to irradiate.

The structure of the stirrer installation at this time is as shown in Figure 2.

That is, the stirrer honeyboss B is attached to the stirrer shaft a attached to the main body of the device, but in order to reduce the frictional resistance caused by the fitting of both, the stirrer spacer C and stirrer receiver d are made of polytetrafluorite having an extremely low coefficient of friction. Because it uses ethylene (Teflon), etc., it increases the cost, and there is a large variation in parts, especially in the stirrer receiver d, which is not desirable as an installation method that does not interfere with the rotation of the stirrer blade, which is the original purpose. .

Therefore, if the stirrer wings are suspended by magnets, the configuration will be as shown in FIG. 3.

In other words, the shaft 5 of the stirrer blade 3 is made of ferromagnetic material, and the heating chamber 1
The entire staff wing 3 is suspended by a magnet 7 provided outside with a non-magnetic metal spacer 6 interposed therebetween.

With this method, there is no frictional resistance when the stirrer rotates, so it is possible to obtain extremely stable radio wave stirring ability.

However, although it is easy to obtain stable rotation of the stirrer blades, it is incomplete in uniformly heating the object to be heated.

In other words, among the conditions for uniform heating such as the size and shape of the heating chamber 1, the size of the stirrer blade 3, and the improvement of the shape 9 rotation,
This is because only the improvement in rotation was satisfied.

Therefore, the present invention can achieve almost uniform heating under any conditions, and has a configuration as shown in FIG. 4.

That is, by reciprocating the magnet 7 installed outside the heating chamber from a power source such as a blower via the Boo'J-8, 9, the belt 10, and the connecting rod 11, the stirrer blade 3 attracted by the magnet 7 is moved. The stirrer blade 3 can be rotated by the wind of the blower and the center of rotation can be reciprocated between the movement range l of the magnet,
It is hoped that the radio wave agitation ability will be improved.

In addition, in order to use the conventional one-type stirrer with this structure, it is necessary to make a large hole in the heating chamber and pass through the axis a of the stirrer blade, which is extremely dangerous due to radio wave leakage, etc., and is difficult to design. Although this was the biggest problem, in the present invention, the opening 12 is provided in the upper plate of the heating chamber, but since it is covered with the metal plate 6, there is no danger of this at all.

In addition, the opening part is pressed as shown in Figure 5.
If the upper plate of the heating chamber is made of a metal such as non-magnetic SUS, it is more effective, extremely safe, highly efficient, and can make the electric field nearly uniform in any case. can be provided.

Therefore, uneven heating of the object to be heated can be almost easily eliminated.

It goes without saying that if the magnet 7 is attached directly to the pulley 9 as shown in Fig. 5, if the stirrer blade 3 is made to revolve around the pulley shaft 13, the locus will be larger and the efficiency will be better. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional high-frequency heating device, Fig. 2 is a sectional view of the main part of a conventional stirrer mounting structure, Fig. 3 is a sectional view of a stirrer mounting structure in which stirrer blades are suspended by magnets, and Fig. 4 is a sectional view of the stirrer mounting structure of the present invention. A top view of a portion of a starrer showing one embodiment;
FIG. 5A is a top view of another embodiment in which a magnet is directly attached to a pulley and the stirrer blades are revolved, and FIG. 5B is a sectional view of the same. 3... Starr blade, 5... Starr blade shaft, 6... Spacer, 7... Magnet, 8, 9... Pulley, 10 ...Belt, 11...Connection rod.

Claims (1)

[Scope of utility model registration request] A radio-wave stirring device in which stirrer blades are suspended by magnets, characterized in that the magnet is provided outside the heating chamber and moved along the upper plate of the heating chamber to move the stirrer blade rotation axis.