JPS649718B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a high-frequency heating device that uses high-frequency waves to heat food and other objects to be heated, and relates to the structure of a power supply port that supplies high-frequency waves into a heating chamber. be.

Configuration of conventional examples and their problems In conventional high-frequency heating devices, those with a power feed port for supplying high frequency waves on the side wall of the heating chamber have one power feed port above or below the side wall for the magnetron. It is provided. The high frequency waves oscillated from the magnetron are sent from the power supply port to the heating chamber via the waveguide, and are irradiated onto the object to be heated housed within the heating chamber.
Therefore, if the power supply port is installed above the side wall of the heating chamber, the high frequency waves will be diffusely reflected in the heating chamber and irradiated onto the food when the food is low, such as frozen delicious food. However, when heating milk or using tall containers such as sake cans,
For items that are relatively tall, such as cakes, the top is heated first, and for milk and alcohol cans, there is a large temperature difference between the top and bottom, so even if the top is boiling, the bottom is still cold. become a state. Also, the upper part of the cake is finished, but the lower part is still raw.

Conversely, if the power supply port is installed at the bottom of the side wall of the heating chamber, the bottom of the milk or alcohol can is heated first, and there is also heat convection within the container, which reduces the temperature difference between the top and bottom. , is heated almost uniformly, but
When it comes to short foods such as frozen yam, the periphery of the object is heated first, and the temperature of the periphery is rising, but the center is still cold.

In this way, the height and size vary depending on the object to be heated, and with conventional power supply ports, depending on the shape of the object to be heated, it may not be possible to heat it evenly, causing uneven heating or insufficient heating. The drawback was that it could not be heated.

Furthermore, depending on the shape of the object to be heated, there are some objects that are not easily irradiated with high frequency waves, and especially those with a small load capacity have the disadvantage that the absorption rate of high frequency waves decreases, resulting in poor heating efficiency.

Purpose of the Invention Therefore, the present invention solves the above-mentioned conventional drawbacks.It is possible to uniformly heat the object to be heated even if the height or size of the object to be heated changes, and even if the load capacity changes. It is an object of the present invention to provide a high-frequency heating device that can perform efficient cooking without reducing heating efficiency.

Structure of the Invention In order to achieve the above object, the present invention has a configuration in which power feeding ports are provided at two locations on the upper and lower sides of the heating chamber, or at multiple locations as necessary, so that the radio waves oscillated from the magnetron can be efficiently irradiated onto the object to be heated. It has the effect of uniformly heating and cooking regardless of the shape of the object to be heated.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a heating chamber in which food is stored and cooked. Reference numeral 2 denotes a magnetron as a high frequency generator. High frequency waves oscillated from the magnetron 2 are guided through a waveguide 3 and irradiated onto the food 6 through a power supply port 5 provided on a side wall 4 of the heating chamber 1. 7 is a high voltage transformer that supplies high voltage power to the magnetron 2. Electrical components such as a high voltage transformer 7 and a capacitor are fixed to the chassis 8.

Further, in the heating chamber 1, a rotary tray 9 on which the food 6 is placed is placed on a rotary mounting table 10, and as a motor 11 connected to the rotary mounting table 10 rotates, the food 6 is placed on the rotary tray 9. It's supposed to rotate. Therefore, this rotary mounting table 10 functions to eliminate uneven heating of the food 6 in the front, rear, left and right directions.

In the above configuration, conventionally, there was only one power supply port 5 provided on the heating chamber side wall 4;
As described above, the shape of the food 6 causes uneven heating, making it impossible to cook the food uniformly.

Therefore, the present invention is configured to eliminate the conventional heating unevenness, and as shown in FIG. It is something.

Hereinafter, the effects of the above configuration will be explained. The high frequency waves oscillated from the magnetron 2 are excited and propagated within the waveguide 3, and first enter the heating chamber 1 through the power supply port 5-a provided below the heating chamber side wall 4, and are irradiated onto the food 6. . The high frequency waves irradiated from the lower power supply port 5-a heat the lower part of the food, and are effective for cooking in tall containers such as milk or alcohol cans.

Next, the high frequency wave that has passed through the lower power supply port 5-a advances further along the waveguide 3 and reaches the heating chamber side wall 4.
The light enters the heating chamber 1 through the power supply port 5-b provided above and irradiates the food 6. This upper power supply port 5
The high frequency irradiated from -b is effective for short, flat foods and heats the central part.

As described above, according to this embodiment, the food can be heated from above and below, or from the periphery and the center, so that the food can be heated uniformly and efficiently regardless of the height or size of the food.

In addition, if the volume of the heating chamber changes or if there is a protrusion such as a heater inside the heating chamber, the temperature balance between the top and bottom of the food may be disrupted, or there may be a temperature difference between the surrounding area and the center, making it impossible to heat the food uniformly. Even if you run out of electricity, you can easily heat food evenly by adjusting the positions and opening areas of the upper and lower power supply ports.

Furthermore, even if you install two power supply ports (top and bottom), if uneven heating occurs depending on the shape of the food, this can be resolved by increasing the number of power supply ports and installing multiple power supply ports. .

Also, taking as an example the case of heating water in one beaker, as the water load decreases to 1, 0.5, 0.25, the amount of energy obtained by the water load generally decreases, but conventionally With the configuration of the power supply port, as the water load decreases, the position of the load moves away from the power supply port, so the rate of decrease is large and the output efficiency with respect to load fluctuations deteriorates. However, if the configuration of the present invention has power feed ports on the top and bottom, even when the water load is low, the rate of decrease in energy amount is small due to the high frequency irradiated from the power feed port below, and efficient heating is possible. Become.

Effects of the Invention As explained above, according to the present invention, the following effects can be obtained.

(1) High-frequency waves are irradiated from the upper and lower power supply ports installed on the side wall of the heating chamber, allowing for uniform heating regardless of the shape of the food, eliminating uneven heating and temperature differences between the top and bottom, allowing for stable cooking. .

(2) Even if the volume of the heating chamber changes or there are protrusions such as a heater or a rotating mounting table inside the heating chamber, by adjusting the position and opening area of the upper and lower power supply ports,
You can easily eliminate uneven heating.

(3) Since efficient heating can be performed from above and below, even when the load is small, the rate of decrease in the amount of absorbed energy is small, the output efficiency against load fluctuations is good, and efficient cooking can be done in a short time.

As described above, the simple configuration of providing two or more power supply ports on the same side wall of the heating chamber makes it possible to heat the food uniformly, ensuring efficient heating and cooking without cooking failures. A high frequency heating device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a main part showing a power feeding structure of a conventional high frequency heating device, and FIG. 2 is a front sectional view of a main part showing a power feeding structure of a high frequency heating device which is an embodiment of the present invention. 1... Heating chamber, 2... Magnetron, 3... Waveguide, 5... Power supply port, 6... Heated object.

Claims (1)

[Claims] 1 A heating chamber in which food is stored and cooked in the main body, a rotary mounting table on which the food is placed, a magnetron that supplies high frequency energy into the heating chamber, and a conductor that guides the high frequency waves oscillated from the magnetron into the heating chamber. 1. A high-frequency heating device comprising: a wave tube, and high-frequency power feeding ports are provided at two or more locations above and below the same side wall of the heating chamber.