JPH01225088A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To improve the cooling of a magnetron and functional components in a main body and improve the life by arranging the cooling opening exhaust side of the magnetron to face the exhaust opening of a rear cabinet of a high-frequency heating device main body and arranging the exhaust opening of the rear cabinet near the cooling opening exhaust section of the magnetron. CONSTITUTION:A magnetron 5 and a cooling fan 15 cooling the magnetron 5 are provided, the cooling opening exhaust side of the magnetron 5 is arranged to face the exhaust opening section 11 of the rear cabinet 7 of a high-frequency heating device main body, the exhaust opening of the rear cabinet 7 is arranged near the cooling opening exhaust side of the megnetron 5. The cooling air flowing through a main body intake opening 9 is sprayed by the cooling fan 15 to the magnetron 5 and discharged almost directly to the outside of the main body from the exhaust side of the cooling opening of the magnetron 5 after the cooling, thus the exhaust resistance is small and the effect of the exhaust heat on the magnetron in the main body is small. The cooling performance of the magnetron and functional components in the main body is improved, the life of components can be improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to cooling of high frequency heating devices.

2. Description of the Related Art An example of a conventional high-frequency heating device will be described with reference to FIGS.

FIG. 5 is a top sectional view of a conventional high-frequency heating device, and FIG. 6 is a top sectional view of another conventional high-frequency heating device.

In Fig. 6, 2 is a heating chamber provided inside the main body of the high-frequency heating device, and the heating chamber 2 is provided with a door 1 that can be opened and closed for taking in and out the heated object. The high frequency generated by the provided magnetron 5 is transmitted to the heating chamber 2.
It is guided to the heating chamber 2 by a waveguide 6 provided in the.

The magnetron 6 provided in the waveguide 6 is connected to the cooling fan 1
5, the exhaust gas that has cooled the magnetron 5 is guided by an exhaust guide 16, and is discharged to the outside of the main body from an exhaust opening 11 provided in the rear cabinet 7 of the main body.
A part of the exhaust gas from the magnetron 5 discharged to the exhaust guide 16 enters the heating chamber through an opening 1° provided in the heating chamber 2, and the water vapor generated by heating the object in the heating chamber 2, The gas passes through an opening 12 provided in the heating chamber 2 and is directed to the exhaust guide 1.
4, and is discharged to the outside of the main body through an exhaust opening 13 provided in the rear cabinet no. 1-7 of the main body.

In FIG. 6 of another conventional example, the heating chamber 2. Door 1° Magnetron 5. The function of the waveguide 6 is the same, and the explanation will be omitted. The magnetron 5 provided in the waveguide 6 cools the magnetron 5 by introducing cooling air through an intake opening 9 provided in the rear cabinet 7 of the main body using a cooling propeller fan 17. The exhaust that has cooled the magnetron 5 is passed through the exhaust guide 1.
6 and enters the heating chamber 2 through the opening 10 provided in the heating chamber 2. Furthermore, the water vapor and gas produced in the heating chamber 2 by heating the object to be heated enters the heating chamber 2. The gas passes through the opening 12 , passes through the exhaust guide 14 , and is discharged out of the main body through the exhaust opening 13 provided in the rear cabinet 7 of the main body.

Problem to be Solved by the Invention However, in the conventional configuration, there is no connection between the magnetron 5 and the exhaust opening 11 or bleed opening 13 of the rear cabinet 7 of the main body.
[The air bleed resistance caused by the long exhaust passage, or the openings 1o and 12 through which the exhaust gas passes in the middle of the exhaust passage, is due to the magnetron 5 or
This was a factor that inhibited effective cooling of the functional parts within the main body. In addition, the exhaust guide 16 that passes the exhaust air from the magnetron 5 passes the high-temperature air after cooling the magnetron 5, so the exhaust guide 16 itself reaches a high temperature, so the heat reduces the cooling effect inside the main body. In addition, the exhaust guide 16 may become hot due to the need to prevent wiring inside the main body from touching the exhaust guide, or when installing functional parts on the high-temperature adhesive guide itself, which may cause restrictions due to the heat. The present invention solves the above problems, and reduces exhaust resistance by exhausting the exhaust gas after cooling the magnetron almost directly out of the magnetron's exhaust section. It is also an object of the present invention to provide a high-frequency heating device that improves the cooling of the magnetron and functional parts within the main body by reducing the influence of exhaust heat from the magnetron within the main body, thereby increasing the lifespan of these parts. This is the purpose.

Means for Solving the Problems In order to solve the above problems, the high frequency heating device of the present invention includes:
A magnetron and a cooling fan for cooling the magnetron are provided, and the cooling opening exhaust side of the magnetron is made to face the rear air opening of the high-frequency heating device body, and the cooling opening exhaust side of the magnetron is provided. The exhaust opening of the rear cabinet is located close to the side part.

Function According to the above structure, the cooling air that flows in through the intake opening of the main body is blown onto the magnetron by the cooling fan, and after cooling the magnetron, it is almost directly discharged to the outside of the main unit from the exhaust side of the cooling opening of the magnetron. be done. For this reason, there is almost no exhaust resistance as an air passage, so the volume of cooling air increases accordingly, improving the cooling effect of the magnetron and functional parts. Furthermore, since the magnetron does not have an exhaust passage inside the main body, there is no adverse effect of heat caused by the exhaust passage. These effects enable effective cooling.

Embodiment FIG. 1 is a side sectional view of a high-frequency heating device showing an embodiment of the present invention, FIG. 2 is a top sectional view of the same high-frequency heating device, and FIG. 3 is a rear sectional view of the same high-frequency heating device. FIG. 4 is a rear sectional view of a high-frequency heating device showing another embodiment. Components and portions that are the same as those of the conventional example or have the same functions are given the same reference numerals and descriptions thereof will be omitted.

As shown in Figures 1, 2, and 3, a magnetron 5 installed on the upper surface of the heating chamber 2 and attached to the lower surface of the waveguide 6 is located between the heating chamber 2 and the main body of the high-frequency heating device. It is provided in the space between the cabinets 7, and an air guide 3 is interposed between the magnetron 5 and the heating chamber 2. magnetron 5
The air that cools the body is supplied through the intake hole 9 provided at the lower front of the main unit.
The air flows into the main body, cools functional parts such as the high-voltage transformer 4 along the way, flows into the cooling fan 15, and is blown onto the air guide 3. The air guide 3 has a partition so as to separate the cooling air into the magnetron 75 side and the heating chamber 2 side. A part of the partitioned cooling air enters the heating chamber 2 through the opening 10 provided in the heating chamber 2, and 9 tons of water vapor accompanying heating the object is transferred to the opening 12 of the heating chamber 2.
, through the exhaust guide 14 and exhausted to the outside of the main body through the exhaust opening 13 provided in the rear cabinet 7. The cooling air of ab is
The air flows into the cooling opening of the magnetron 5, cools the magnetron 5, and is immediately discharged from the main body through the air opening 11 provided in the rear cabinet 7.

In this way, since the structure is such that the wind that cools the magnetron 5 is immediately exhausted, there is no exhaust resistance associated with the υ air passage of the magnetron 5, and the exhaust heat is immediately exhausted outside the main body. The influence of the exhaust heat inside is limited to the area around the bleed opening 11.

Further, since the air guide 3 passes the air before cooling the magnetron 5, the temperature of the air guide 13 is almost the same as that of the cooling air, and does not cause an increase in the temperature inside the main body. Therefore, the cooling air inside the main body flows smoothly and is less affected by the exhaust heat of the magnetron 5, making it possible to realize a high-frequency heating device with a high cooling effect.

Further, in the case of another embodiment shown in FIG. 4, the cooling structure and its functions and effects are the same as those of the first embodiment, but here, the ripple effects of the present invention will be explained using FIG. 4. As explained above, 9, the exhaust of Magne 1-Lon 5 is located in the rear cabinet 7.
Because the two magnetrons face each other, there is no guide for exhaust gas in conventional magnetrons, so the space can be used effectively. 9. In the two magnetron system, the present invention has the following advantages in reducing the size of the main body: This will have a huge ripple effect. To explain the function of Fig. 4, the magnetron 5 and waveguide 6 on the upper side of the heating chamber 2 and the cooling fan 1 on the left side
5 is the same as the description of the previous embodiment. Also, the magnetron 5 on the lower side, its waveguide 6, and the cooling fan 1 on the right side.
The functions and effects of the fifth embodiment are similar to those of the above-mentioned embodiment. However, the air guide 18 that connects the cooling fan 16 on the right side and the magnetron 5 on the lower side is similar to the air guide 3 of the above-mentioned embodiment, although the shape is different. It leads to

Moreover, the different ripple effects in the other embodiment shown in FIG. ll! There is. Scissor mono isochi 9・′・−
7 19 is a switch provided on the magnetron 5. For example, if the cooling fan 15 that cools the magnetron 5 stops due to a failure while the main body is working, the magnetron 5 that stopped will become abnormally hot because cooling stops. goes up and magnetron 5 breaks. In order to prevent this, the function is to stop the power supply to the magnetron, but if one of the cooling fans on the left or right stops when two magnetrons are configured as shown in Figure 4, the remaining cooling fan will start working. Because of this, there is a phenomenon in which air from outside the main body flows backward through the exhaust opening of the stopped magnetron 5. At this time, the thermoswitch 19 provided on the magnetron 5 is heated by the magnetron 5 and at the same time cooled by the air flowing back outside the main body, so the thermoswitch 19 becomes difficult to turn off. The same phenomenon occurs in the present invention, but since the present invention is configured such that the exhaust gas from the magnetron 5 is immediately exhausted outside the main body, if the air outside the main body flows backward due to the above phenomenon, the thermo switch 19 is further activated. At the same time, the magnetron 5 is effectively cooled and the temperature rises abnormally, leading to problems. Even if the cooling fan 15 on one side of the two-piece magnetron 5 malfunctions and the cooling fan 15 is operated on one side, the high-frequency heating device is not immediately reduced to half its output, and the failure of the cooling fan 15 is displayed. Cooling fan 1
5 has the advantage of being able to be used at full output until it is repaired. Of course, the thermo switch 19 of Magneron 1-5 will be activated if both cooling fans 15 fail.
Needless to say, since the entire high-frequency heating device is not cooled completely, there is no backflow of air outside the main body as described above, and the magnetron 5 is protected by operating normally.

In addition to the effects of the invention, the high frequency heating device of the invention can provide secondary effects.

(1) Since the exhaust gas that has cooled the magnetron is discharged almost directly from the magnetron to the outside of the main body, there is less exhaust resistance, and there is also less noise due to the magnetron's heat exchanger IC inside the main body, making it comparable to the magnetron. Since the cooling performance of the functional parts within the main body is improved, the lifespan of those parts can be increased accordingly.

(2) In the type where two magnetrons are used, since there is no need to secure an exhaust passage for the magnetrons, the high-frequency heating device can be made more compact by effectively utilizing the subane.

(3) In a type that uses two magnetrons and two cooling fans, if only one side of the cooling fan fails, air from outside the main unit directly flows in from the exhaust side of the magnetron, making it impossible to properly cool the magnetron. It is possible to enable the operation of the magnetron on the side of the failed cooling fan until the failure of the cooling fan is repaired.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a high-frequency heating device showing one embodiment of the present invention, FIG. 2 is a top sectional view of the same high-frequency heating device, and FIG.
The figure is a rear sectional view of the same high-frequency heating device, FIG. 4 is a rear sectional view of the high-frequency heating device showing another embodiment, FIG. 5 is a top sectional view of the conventional high-frequency heating device, and FIG. 6 is another conventional high-frequency heating device. FIG. 3 is a top sectional view of the high-frequency heating device of FIG. 3.18... Air guide, 5... Magnetron, 7... Rear cabinet, 11... Rear cabinet, exhaust opening (for magnetron), 15... Cooling fan, 19...Thermo switch (for magnetron).

Claims (1)

[Claims] A magnetron and a cooling fan for cooling the magnetron are provided, and the cooling opening exhaust side of the magnetron is opposed to the exhaust opening of the rear cabinet of the high-frequency heating device main body, and the cooling opening exhaust of the magnetron is connected to the exhaust opening of the rear cabinet. A high frequency heating device in close proximity to each other.