JPS634887Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a sensor-type high-frequency heating device, and particularly relates to a sensor-type high-frequency heating device with an improved sensor cooling structure.

[Technical background of the invention and its problems]

A microwave oven with a sensor installed on the wall of the heating chamber.
In so-called sensor-type microwave ovens, the sensor needs to be cooled because it easily becomes hot. In particular, it is necessary to cool the sensor itself quite efficiently.

Regarding this cooling, conventionally, as shown in Fig. 1, in addition to a blower fan b which is a magnetron cooling fan that cools the magnetron a and other electrical components, a sensor cooling device that cools a sensor d provided on the wall of the heating chamber c has been used. A structure is adopted in which a fan e is provided for cooling the sensor d independently (dedicated). Note that f is a duct connecting the sensor d and the sensor cooling fan e, and g is a high-voltage transformer.

However, such a technique requires two cooling fans, resulting in a problem of high cost. Moreover, since the dedicated space occupied by the cooling fan is large,
The problem is that the microwave tends to become larger.

[Purpose of invention]

This invention was made in view of the above circumstances, and its purpose is to provide a sensor-type high-frequency heating device that can sufficiently cool the magnetron, other electrical parts, and sensors with a single cooling fan. There is a particular thing.

[Summary of the idea]

This idea involves providing a magnetron cooling fan with two suction ports, one of which opens into the case, and the other suction port of the magnetron cooling fan passing through a sensor and opening outside the case to draw air. By connecting the channels, a single magnetron cooling fan can cool sensors and heat-generating electrical components together with the magnetron.

[Example of idea]

This invention will be explained below based on an embodiment shown in the drawings. 1 in Figure 2 is the heating chamber of a microwave oven, and a sensor 2 is installed on the upper wall of this heating chamber 1.
is provided. Further, a magnetron 3 is provided on the side of the heating chamber 1. The discharge side of a blower fan 4, which is a magnetron cooling fan, is connected to the magnetron 3 via a duct 5, so that the magnetron 3 and other electrical components such as a high voltage transformer 9 can be cooled. There is. Further, on the suction side of the blower fan 4, a duct 6 is provided on the outer surface of the wall of the heating chamber 1.
one end is connected. For this connection, as shown in FIG. 3, a second suction port 4b is formed in the side wall of the case 4c facing the suction port 4a of the blower fan 4, and a duct 6 is connected to this suction port 4b. It is now possible to perform suction from the system. The other end of the duct 6 is connected to the heating chamber 1.
the rear plate 7 of the case 7 via the sensor 2 installed on the
It opens to the outside of the machine through a, and constitutes a suction air path 8 that connects the outside air and the blower fan 4 with the sensor 2 interposed therebetween. It goes without saying that the opening of the duct 6 is provided with, for example, a punching portion (not shown) and a suction port (not shown).

The cooling effect of the microwave oven configured as described above is achieved by sucking air through the opening of the duct 6 by driving the blower fan 4. The outside air flowing in from the duct 6 flows through the suction air path 8, cools the sensor 2 placed in the suction air path 8, and then further flows through the suction air path 8 and is sucked into the blower fan 4, and is sent to the sensor 2. 2
is sufficiently cooled. On the other hand, at the suction port 4a, outside air is sucked in through an air intake port (not shown) provided in the case 7, and the air after cooling electrical components (not shown) is sucked into the suction port 4a. Then, the air is discharged to the magnetron 3 through the duct 5 together with the air sucked through the duct 6, and after cooling the magnetron 3,
It will be discharged into the heating chamber 1 or outside the machine.

In this way, the magnetron 3, electrical components, and sensor 2 can be sufficiently cooled with one blower fan 4.

Therefore, only one cooling fan is required, the cost can be reduced, and the microwave oven can be made smaller. Moreover, since only the suction air passage 8 is provided, the structure is simple.

Furthermore, in the above-described embodiments, this invention was applied to a microwave oven using a blower fan as the magnetron cooling fan, but it goes without saying that it can also be applied to a microwave oven using a propeller fan.

Further, in the above-mentioned embodiment, this invention was applied to a microwave oven, but it is of course applicable to a high-frequency heating device equipped with a sensor other than a microwave oven.

[Effect of idea]

As explained above, according to this invention, the sensor, magnetron, and electrical components can be sufficiently cooled with one magnetron cooling fan by installing the suction air path.

Therefore, it is possible to reduce costs and downsize the device. Moreover, the structure is simple because it only requires the installation of a suction air path.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the structure of a sensor cooling system in a conventional sensor-type high-frequency heating device, Fig. 2 is a perspective view showing a sensor-type high-frequency heating device according to an embodiment of this invention, and Fig. 3 is a perspective view showing the suction air of the sensor-type high-frequency heating device. FIG. 3 is a side view showing the connection structure between the passageway and the cooling fan. 2...Sensor, 3...Magnetron, 4...
Blower fan (magnetron cooling fan), 8
...Suction air path, 9...High voltage transformer (electrical component that generates heat).

Claims (1)

[Scope of utility model registration request] a case provided with a heating chamber therein; a sensor and a magnetron provided in the heating chamber;
A heat-generating electric component provided in the case together with the magnetron; a magnetron cooling fan having two suction ports whose discharge side is connected to the magnetron, and one suction port opening into the case; and the magnetron. 1. A sensor-type high-frequency heating device comprising: a suction air path connected to the other suction port of the cooling fan and opening to the outside of the case via the sensor.