JP2853463B2 - High frequency heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device,
In particular, it relates to the cooling configuration.

[0002]

2. Description of the Related Art Recently, as a cooling method for a high-frequency heating device, a cooling method in which air is supplied from the back side and a cooling method in which air is supplied from the rear side have been considered from the viewpoint of noise prevention from the viewpoint of noise prevention. There have been many problems such as the possibility that cooling performance may be impaired by falling paper pieces and the like.

A conventional example will be described below with reference to FIG. As shown in FIG. 4, a magnetron 3 which is a high-frequency generating means is attached to the heating chamber 1 via a waveguide 2 coupled to the back of the heating chamber, and an inverter power supply which is a power supply section facing the magnetron 3. 4 is attached to an air guide 5 which is a holding member. A magnetron 3 and an inverter power supply 4 are provided below the air guide 5.
A blower 6 for cooling the like is mounted with the output shaft facing upward. The heating chamber 1 and the air guide 5 are fixed to a bottom plate 8 having an air supply port 7 at a lower portion of the blower 6.

The magnetron 3, the inverter power supply 4, and the like are cooled by sucking the cooling air from the air supply port 7 of the bottom plate 8 by the blower 6.

[0005]

However, in this configuration, when a thin and light flat object such as a piece of paper is present on the floor 9 near the air inlet 7 of the bottom plate 8, the air inlet 7 There is a problem in that an object is adsorbed on the surface of the device, the temperatures of the magnetron 3 and the inverter power supply 4 and the like are remarkably increased, and there is a possibility of thermal runaway and destruction of parts.

Accordingly, a first object of the present invention is to provide a high-frequency heating device capable of ensuring cooling performance even when the air supply port is closed.

It is a second object of the present invention to provide a high-frequency heating apparatus having a shape of an air supply port for preventing complete closing of the air supply port.

[0008]

In order to achieve the above object, a high-frequency heating apparatus according to the present invention has the following configuration.

That is, the heating chamber, the high-frequency generating means coupled to the heating chamber, a power supply for driving the high-frequency generating means, and a blowing direction for cooling the high-frequency generating means and the power supply are defined as follows. A blower facing upward, an air guide provided to send the wind from the blower to the high-frequency generating means and the power supply unit, and a part of the air guide, and holding the power supply unit A member, comprising a bottom plate having an air supply port at a plurality of locations for fixing the heating chamber and the holding member, wherein the holding member is partitioned to divide the air supply ports at a plurality of locations of the bottom plate,
A plurality of air supply ports are provided, and a connection hole is provided below the air supply port so that the air supply ports are connected to each other.

In order to achieve the second object, the present invention has a configuration in which a main air supply port is provided with a step.

[0011]

In the high-frequency heating apparatus of the present invention, a plurality of air supply ports are provided on the bottom plate, and the air supply ports are connected between the air supply ports, whereby one air supply port is completely closed by a shield. Even in this case, cooling performance is ensured by supplying air from another air supply port, and thermal runaway and destruction of parts can be prevented.

Further, by providing a step in the air supply port, it is possible to prevent the air supply port from being completely closed and to ensure cooling performance.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-frequency heating apparatus according to one embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a magnetron 3 which is a high-frequency generating means is attached to the heating chamber 1 via a waveguide 2 connected to the back surface 1a of the heating chamber 1, and the magnetron 3 faces the magnetron 3. An inverter power supply 4 as a power supply unit is attached to the holding member. This holding member constitutes a part of the air guide. A blower 6 for cooling the magnetron 3 and the inverter power supply 4 and the like is mounted below the air guide 5 with the output shaft facing upward. The heating chamber 1 and the air guide 5
Is fixed to a bottom plate 8 having an air supply port 7 and an air supply port 10 below the blower 6. At this time, the holding member is attached at a position where the air supply port is divided.

As shown in FIG. 1, the air guide 5 has an L-shape when viewed from the side, an inverter power supply 4 is attached to a vertical portion 5a, and a blower 6 for cooling is provided in a horizontal portion 5b. Is provided. The vertical portion 5a and the horizontal portion 5b of the air guide 5
By using a connecting hole at the intersection 5c of the air blower 6, in addition to the main air supply opening 7 at the lower part of the blower 6, an auxiliary provided between the operation unit 11 and the vertical part 5a of the air guide 5 is provided. The air supply from the typical air supply port 10 is also possible.

In this embodiment, the intersection 5 of the air guide 5
By connecting the two air supply ports 7 and 10 at c, even if one of the air supply ports becomes completely shielded by a shield, the magnetron is supplied by air from another air supply port. 3 and the parts of the inverter power supply 4 can be prevented from thermal destruction,
The reliability and safety of the entire product are improved.

Further, by connecting the air supply ports 7 and 10 at a plurality of locations with the air guide 5, the air supply resistance of the blower 6 can be adjusted.

Next, a high-frequency heating apparatus according to a second aspect will be described with reference to FIG. As shown in FIG. 3, the air supply port 7 provided on the bottom plate 8 partitioned by the air guide 5 below the blower 6 is formed in two stages, each of which has an opening. With such a shape, the opening 7 is formed by a flat thin shield 12 such as a piece of paper on the floor 9.
Even if b is shielded, by supplying air through the other opening 7a, it is possible to prevent thermal destruction of the components of the magnetron 3 and the inverter power supply 4, thereby improving the reliability and safety of the entire product.

[0019]

As described above, the following effects can be obtained in the high-frequency heating device of the first aspect.

(1) By connecting two air supply ports by an air guide, even if one of the air supply ports is completely shielded by a shield, air is supplied from another air supply port. Thereby, it is possible to prevent the thermal destruction of the components of the magnetron and the inverter power supply, thereby improving the reliability and safety of the entire product.

(2) By connecting a plurality of air supply ports with an air guide, the air supply resistance of the blower can be adjusted.

In the high-frequency heating device according to the second aspect of the present invention, the air supply port is formed in two stages and the opening is provided in the two stages, so that the heat damage of the parts due to the shield can be prevented in a space-saving and cost-saving manner. It is possible to improve the reliability and safety of the entire product.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a high-frequency heating device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the high-frequency heating device.

FIG. 3A is a plan view of a main part of a bottom plate of the high-frequency heating device. FIG. 3B is a front view of an air supply port of the high-frequency heating device.

FIG. 4 is a perspective view of a conventional high-frequency heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating room 3 Magnetron (high frequency generation means) 4 Inverter power supply 5 Air guide 6 Blower 7, 10 Air supply port 8 Bottom plate

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuhiro Umekage 1006, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-5-335070 (JP, A) JP-A-6 -20767 (JP, A) Actually open 55-128393 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24C 7/02 541 H05B 6/64

Claims (2)

(57) [Claims] A heating chamber; a high-frequency generator coupled to the heating chamber; a power supply for driving the high-frequency generator; a blower for cooling the high-frequency generator and the power supply; An air guide provided to blow the air from the blower to the high-frequency generating means and the power supply unit, a holding member that forms a part of the air guide and holds the power supply unit, the heating chamber, Consisting of a bottom plate having an air supply port at a plurality of locations for fixing the holding member,
The holding member has a configuration in which a partition is provided so as to divide a plurality of air supply ports of the bottom plate, a plurality of air supply ports are provided, and a connection hole is provided at a lower portion thereof so as to connect these air supply ports. High frequency heating device. 2. The high-frequency heating apparatus according to claim 1, wherein a plurality of steps are provided in an air supply port section partitioned by said holding member.