JPS591137Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high frequency heating device equipped with a heater.

Conventionally, high-frequency heating devices have had the great advantage of irradiating a heated object with high-frequency waves oscillated by a high-frequency oscillator such as a magnetron, thereby causing the heated object itself to generate heat and quickly heating it.

In addition, since the object to be heated is heated itself, there is no browning, and it is extremely effective in reheating.

However, recently, home-made sweets such as bread, cakes, and kutskii have become more common, and dishes such as roast chicken, fish, meat, and gratin have become more popular.
Because it doesn't brown like it does when heated in an oven, it looks very unappealing and lacks something, and fish and meat dishes in particular can be so unpleasant that you don't feel like eating them.

Therefore, recently, in order to brown the food, high-frequency heating devices incorporating a heater have been put into practice.

Also, at this time, there are those that have a structure in which the heater is brought close to the object to be heated for the sole purpose of browning, and those that allow full-fledged oven cooking in which the temperature inside the heating chamber is raised to a high temperature.

The latter method is much better in terms of cooking repertoire and quality of cooking, but the electric parts of the high-frequency heating device and the outer casing reach extremely high temperatures, making it difficult to insulate them, and it is difficult to insulate them, and it is difficult to insulate them. In some cases, this would result in a significant increase in cost, which was not very desirable.

Therefore, the present invention uses a metal plate for insulation, so it can be done at a very low cost and has a large insulation effect.It also has the advantage that the outer casing does not get hot, which is the image of conventional high-frequency heating equipment. It is.

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

FIG. 1 shows a conventional high-frequency heating device 1 in which heaters 3 and 4 are built into the heating chamber 2 to enable oven cooking.

FIG. 2 shows the movement of heat using arrows when the high-frequency heating device is used as an oven.

In this example, no heat insulating material is used, and as shown by the arrow in the figure, heat dissipates rapidly from the heating chamber 2 and the outer casing 5 of the equipment body, and as a result, the set temperature of the heating chamber does not reach the set temperature. The rise in temperature within the heating chamber is extremely slow.

Moreover, even once the temperature of the heating chamber reaches the set temperature, the efficiency is very low due to the poor heat retention ability, and the power consumption per hour is high, resulting in high electricity costs for the user.

Furthermore, the fact that the temperature in the heating chamber 2 is easily dissipated means that the temperature of the outer casing 5 of the high-frequency heating device becomes high enough to cause a risk of a user touching it and suffering from burns.

For the reasons mentioned above, insulation materials are often used, but since they are expensive, the cost increases significantly.
As a result, the consumer ends up having to bear the cost increase as well.

Therefore, in the present invention, as shown in FIG. A heat insulating space is formed between the two.

This effect is aimed at keeping the heating chamber warm by blocking heat radiation from the heating chamber 2 with the metal plate 9, but this structure also provides the same effect on the rear wall of the heating chamber.

In FIG. 3, 11 is a high-frequency oscillator that supplies high-frequency waves to the heating chamber 2, and 12 is a high-voltage transformer provided at the bottom of the space formed by the side and rear walls of the heating chamber and the outer casing.
This serves as a power supply component for the high frequency oscillator 11.

As described above, according to the present invention, it is not only very inexpensive, but also has a very large effect, and the power consumption per hour is extremely low.

Furthermore, since the heat retention ability is improved, the temperature of the outer casing 5, especially at the part 10, is lowered, which is very beneficial for the user.

Furthermore, the transformer that applies high voltage to the high-frequency oscillator has conventionally been attached to the bottom plate, but the transformer generates a very large leakage magnetic flux, and if there is a ferromagnetic material nearby, it can cause magnetic vibrations.

If this is made of non-magnetic material such as aluminum, copper, or austenitic stainless steel, the cost will increase significantly.

In particular, in order to reduce the heat capacity, it is necessary to construct the heat insulating plate from an extremely thin metal plate, but on the other hand, the mechanical strength is reduced, making it easy to generate chattering noises and the like.

Therefore, the present invention solves the above-mentioned problems by configuring the metal plate so that the lower end does not reach the bottom of the heating chamber.

[Brief explanation of the drawing]

Fig. 1 is a front view of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is a sectional view of the high-frequency heating device shown in Fig. 1 when the heater is in use, and Fig. 3 is a sectional view of an embodiment of the same invention. It is. 2... Heating chamber, 3, 4... Heater, 5
...Outer casing, 6...Top plate, 7...
・Flange part, 8... Heating chamber side wall, 9...
...Metal plate, 11...High frequency oscillator, 12...
...High voltage transformer.

Claims (1)

[Scope of utility model registration request] The heating chamber is equipped with a high-frequency oscillator that supplies high-frequency waves and a heater provided in the heating chamber, and a transformer, etc. that serves as a power source for the high-frequency oscillator is installed in the lower part of the space formed by the side wall and rear wall of the heating chamber and the outer casing. A metal plate smaller than the side and rear walls of the heating chamber is inserted into the upper part of the space substantially parallel to the side and rear walls, and the upper end of this metal plate is in contact with the upper plate of the heating chamber. The high-frequency heating device comprises a metal plate that is fixed to the side wall and the rear wall to form a heat retaining space between the metal plate and the side wall and the rear wall.