JPS582964Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a high-frequency heating device that uses a steam generator as a heat source in addition to a high-frequency oscillator.

A high-frequency heating device generally has a ventilation hole on the bottom surface of the main body to take in outside air to cool the high-frequency oscillator and high-voltage transformer.

In particular, in the case of a high-frequency heating device that uses a steam generator as a heating source in addition to a high-frequency oscillator, the water (hot water) that collects in the water tray provided on the bottom of the main unit during steam heating re-evaporates and becomes steam. There is a risk that the particles will diffuse in all directions along the bottom surface of the main body and enter through the ventilation holes, reducing the electrical insulation of electrical components such as high-frequency oscillators and high-voltage transformers, or causing electric shock accidents.

Therefore, an object of the present invention is to provide a high-frequency heating device that can prevent the generation of undesirable water due to steam entering from the ventilation openings as described above.

Examples will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a high-frequency oscillator that generates high-frequency energy, and 2 is a high-voltage transformer that is one of the components of a drive circuit that drives this high-frequency oscillator 1. In FIG.

3 is a waveguide that supplies high frequency energy into the heating chamber 4, which connects the high frequency supply port 4a provided in the heating chamber 4 and the high frequency oscillator 1.
are connected.

A sealing plate 5 is made of a silicon laminate plate or the like that transmits high frequency energy, and closes the high frequency supply port 4a.

Reference numeral 6 denotes a rotary tray on which the object to be heated 7 is placed and rotated. The rotary tray 6 is supported by a rotary table 8 and is detachably provided in the heating chamber 4.

The weight of the rotary table 8 is supported by bearings 9 and is rotated by a drive monitor 10.

The lower part of the drive motor 10 is covered by a motor cover 12 attached to the lower surface 11a of the main body 11.

The motor cover 12 is connected to the upper heater 1 provided in the upper part of the heating chamber 4.
In order to prevent the drive motor 10 from being damaged due to a rise in temperature during open cooking, etc., the lower heater 14 provided at the bottom of the drive motor 3 and the lower heater 14 has a large number of small holes for introducing outside air.

Reference numeral 11aa denotes a ventilation hole that takes in outside air to cool electrical components such as the high-frequency oscillator 1 and the high-voltage transformer 2, and consists of a group of small holes formed on the lower surface 11a of the main body facing the high-voltage transformer 2.

15 is a high-frequency oscillator 1, a heater 13,
This is a heat shield plate that prevents heat emitted from the heating chamber 4 from flowing into the electrical component storage chamber 16 that houses various electrical components that control the heating chamber 4 and the like.

17 is a steam emission port. Reference numeral 18 denotes a water tray that receives water droplets that leak to the outside of the main body 11 during steam heating.

The water tray 18 includes legs 19a with a U-shaped cross section attached to the lower surface 11a of the main body, and support pieces 20a protruding from the sides of the legs 19b.
, 20b, so that it can be taken out and sprayed with water as needed.

The legs 19a and 19b extend long along the right and left sides of the water tray 18, respectively.

When the foot 19a blocks the bottom of the ventilation hole 11aaO, it is necessary to provide a through hole 19aa of an appropriate size in the foot 19a so that outside air can easily flow into the ventilation hole 11aa.

In FIG. 2, reference numeral 21 denotes a steam generator incorporating a steam heater 21a, which radiates steam into the heating chamber 4 through a steam radiating port 17 when steam-heating Chinese Manzu, pudding, or the like.

Reference numeral 22 denotes a drain pipe that guides water droplets condensed on the inner surface of the heating chamber 4 during steam heating to the water droplet inlet 18a of the water tray 18.

23 indicates that even if the steam leaked from the heating chamber 4 through the steam drain pipe 22, which is re-evaporated from the water (hot water) accumulated in the water tray, is diffused along the lower surface 11a of the main body, it still flows to the rear of the water droplet intake port 18a. This is a steam blocking plate that prevents the flow of residue, and extends in the left-right direction, with the right end being the foot 19a and the left end being the foot 19a, as shown in Figure 3.
9b, and the upper surface abuts against the lower surface 11a of the main body via the elastic body 23a.

24 is a square provided on the front surface of the heating chamber 4 so as to be openable and closable.

As shown in FIGS. 1 to 3, even if water droplets leak from the joints of the heating chamber 4 to the lower surface 11a of the main body, the water droplets will flow from the mounting part of the drive motor 10 to the water droplet inlet 18a of the water tray 18.
In order to prevent the drive motor 10 from falling to other parts, the area around the square hole in the lower surface 11a of the main body is raised up.

The heat shield plate 15 is installed to prevent the leaked water droplets from flowing along the lower surface 11a of the main body and into the electrical component storage chamber 16.
The part of the lower surface 11a of the main body that is in contact with the lower surface 11a is squeezed upward.

Furthermore, the lower surface 11a of the main body is squeezed into a bowl shape (enclosure) with the bottom of the lower surface 11 & of the main body passing through the drain pipe 220, and the water droplets leaking from the bottom are collected at the water droplet intake port 18 of the water tray 18.
It is designed to be dropped to a.

Since the bottom surface 11a of the main body has a complicated shape, even if an attempt is made to bring the steam blocking plate 23 into direct contact with the bottom surface 11a of the main body, a gap is likely to be formed in some parts (through the gap, the water droplet inlet 18a There is a risk that steam re-evaporated from the main body and diffused along the lower surface 11a of the main body may enter the ventilation hole 11aa or the small hole of the motor cover 12. However, since the steam blocking plate 23 is attached via the elastic body 23a, this fear can be avoided. do not have.

Next, the operation of the high frequency heating device of the present invention will be explained.

This device is capable of performing various kinds of cooking using one or a combination of high-frequency heating by the high-frequency oscillator 1, steam heating by the steam generator 21, and heater heating by the upper and lower heaters 13 and 14.

Water that condenses in the heating chamber 4 and falls from the drain pipe 22 during steam heating and water that condenses and falls from around the door 24 accumulates in the water tray 18.

The water collected in this water tray is rather hot water, and since the temperature is considerably higher than the outside air, it re-evaporates from the water droplet intake port 18a.

This re-evaporated steam is diffused along the lower surface 11a of the main body.

However, the right side of the water droplet inlet 18a is surrounded by a foot 19a, the left side is surrounded by a foot 19b, and the rear side is surrounded by a steam blocking plate 23 attached to the lower surface 11a of the main body via an elastic body.
Since the water droplet inlet 18a is provided only in the front of the top surface, the re-evaporated steam is discharged to the front of the main body 11.

Therefore, the motor cover 1 attached to the lower surface 11a of the main body
2 and the drive motor 10, without steam entering the small hole group provided in the ventilation hole 11aa facing the high voltage transformer.
Degradation of electrical insulation of electrical parts such as the high voltage transformer 2 and the high frequency oscillator 1 and electric shock accidents do not occur.

When steam is heated, it leaks from the drain pipe 22 and the lower surface 11 of the main body
The steam diffusing along the direction a is also released to the front of the main body 11 in the same manner as described above.

Note that the steam blocking plate 23 attached to the lower surface 11a of the main body via the elastic body 23a may be configured to surround the water droplet intake port 18a on the left, right, and rear sides.

As described above, according to the present invention, even if the lower surface 11a of the main body has a complicated shape, the water droplet intake port 18a is provided in front of the upper surface of the water tray 18, and the water droplet intake port 18a and the ventilation port 11a are connected. Since the steam blocking tray 3 is provided on the lower surface 11a of the main body between the two via the elastic body 23a, the water accumulated in the water tray 18 during steam heating re-evaporates and becomes steam, which is diffused along the lower surface 11a of the main body. This steam is emitted forward and does not enter the ventilation hole 11aa that takes in outside air to cool the electrical components such as the high frequency oscillator 1, so it is safe to prevent electrical insulation deterioration of the electrical components such as the high frequency oscillator 1 and electric shock accidents. A high-frequency heating device can be provided.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic front and side cross-sectional views showing an embodiment of the present invention, respectively. FIG. 3 is a schematic cross-sectional view of the main part viewed from the direction of arrow AB in FIG. 1...High frequency oscillator, 11a...Bottom surface of main body, 18...Water tray, 18a...Water droplet inlet, 21...Steam Generator, 23...
...Steam blocking plate, 23a...Elastic body.

Claims (1)

[Scope of utility model registration request] In addition to the high-frequency oscillator, a steam generator is used as a heat source, and a water receiving surface is provided on the bottom of the main unit to catch water that condenses and falls from the heating chamber during steam heating, and a water receiving surface is provided on the bottom of the main unit to cool the electrical components such as the high-frequency oscillator. A water droplet intake port is provided in front of the upper surface of the water tray, and a steam blocking plate is provided on the bottom surface of the main body between the water droplet intake port and the ventilation port using an elastic body. A high-frequency heating device characterized in that it is attached via a.