JPS6012971Y2 - High frequency heating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a high-frequency heating device with a heater installed in the heating chamber and used in combination with radio wave heating to add fish marks to food. Moreover, it is an attempt to realize a high-frequency heating device with a simple structure.

FIG. 1 shows a cross-sectional view of the structure of a conventional high-frequency heating device.

In FIG. 1, a magnetron 2 is installed in a heating chamber 1 and irradiates radio waves into the heating chamber 1.

Furthermore, a heater 3 is provided within the heating chamber 1. Reference numeral 4 denotes an object to be heated, which is subjected to high-frequency heating by radio waves from the magnetron 2 or heater heating by the heater 3.

Here, the heater 3 is generally a sheathed heater in which a heating element is housed in a metal pipe.

Since the surface of this sheathed heater is covered with a metal pipe, it takes a considerable amount of time for the heat of the heating element to be transmitted to the surface of the sheathed heater and the surface temperature to rise.

In other words, the rise in temperature from the start of energization is slow.

Furthermore, since the temperature of the surface of the sheathed heater is inevitably lower than the temperature of the heating element inside the sheathed heater, it is less likely to become red hot and the amount of infrared rays emitted is small.

For this reason, not only did the time required for heating with the heater become longer, but there was also the drawback that sufficient fish-eye formation was not achieved.

Some methods used infrared heaters to solve this problem, but the radio wave seal structure of the heater part and the associated assembly structure become complicated, making assembly and repair difficult, so it is not practical. The current situation is that it has not been done.

□The present invention aims to eliminate these conventional drawbacks and realize a high-frequency heating device with a simple configuration, safety, and good heating performance.

FIG. 2 is a side sectional view of an embodiment of the high frequency heating device according to the present invention, and FIG. 3 is a partial sectional view showing the heater portion of the device in detail.

In FIGS. 2 and 3, the heating chamber 11 includes a magnetron 1.
2 and irradiating radio waves into 11 is the same.

A sub-heating chamber 14 is constructed within the heating chamber 11 and surrounded by a wire mesh 13 made of punching metal, wire mesh, etc., which allows heat and infrared rays to pass through and has a radio wave shielding effect.

A heater fixing fitting 15 is provided in the sub-heating chamber 14, and a heater support 16 and a heater support 17 made of a heat-resistant insulator such as ceramics are fixedly provided at both ends of the heater fixing fitting 15. Pipe 1 by support 16.17
8 is fixedly supported.

The pipe 18 is made of a heat-resistant insulator, such as crystallized glass or quartz glass, which has good infrared transmittance and high heat resistance.

A heating wire 19 is passed through this pipe 18, and a lead wire 2
0 to the outside of the heating chamber 11.

In this manner, the heater support 16, the heater support 17, the pipe 18, the heating wire 19, and other parts constituting a so-called heater are all integrally fixed to the heater fixing fitting 15 to constitute a heater assembly.

This heater assembly is integrated with the screw 21 to adjust the power to the heat chamber 1.
It is configured to be installed inside 4.

According to such a configuration, the object to be heated 22 is the magnetron 1
The object to be heated 22 is heated by the radio waves from the heating wire 19 through the heat pipe 18 of the heating wire 19 and the mesh of the wire mesh 13.

Since the pipe 18 is made of a heat-resistant insulator with good infrared transmittance, the infrared rays emitted from the heating wire 19 are directly irradiated onto the object 22 to be heated, so that the object 22 is heated by side radiation heat.

Furthermore, since the pipe 18 is made of an insulator, it has a very low heat capacity and is easily heated compared to a metal body such as a sheathed heater.

Therefore, the heating wire 19 becomes red hot in a short time after being energized, and the heating rise time is shortened.

This makes it possible to shorten the time required to mark the fish while heating the heater, and at the same time, it is possible to make a sufficient number of marks, making it possible to realize a convenient, resource-saving device that consumes less electricity.

Since the inside of the sub-heating chamber 14 is shielded from radio waves by the wire mesh 13, the heater is not irradiated with radio waves, which not only prevents the risk of malfunctions such as burnout and disconnection due to sparks, but also improves the heater support. The body, pipes, etc. do not need to be made of expensive materials with particularly good high frequency characteristics and can be constructed at low cost.

Furthermore, since the heater is configured by integrally fixing all the heater parts to the heater fixing bracket 15 to form a heater assembly, the heater can be easily installed and removed in the sub-heating chamber 1:4 by simply installing and removing the screws 21. This makes it extremely easy to assemble the device and replace it during repairs.

Moreover, since the heating chamber is provided in the sub-heating chamber 14, radio waves are shielded, and of course there is no need for any special radio wave sealing means for the lead wire 20, making it easy to connect and disconnect the wires. As a result, assembly, replacement, and other tasks can be performed more easily.

The wire mesh 13 not only blocks radio waves, but also prevents hands and objects from directly hitting the heater, eliminating the risk of the pipe 18 breaking, resulting in a safe and robust structure.

Furthermore, if the heater fixing metal fitting 15 is made of a plate that easily reflects heat, such as a mirror plate, and is provided on the top or side surface of the heater, as appropriate, it can also serve as a heat reflecting plate.

For example, if this is provided on the top surface of the heater, the infrared rays directed upward will be reflected downward, and the object to be heated 2
Since the amount of infrared rays irradiated to the second part increases, it is possible to heat the part 2 more efficiently.

Further, since the heat directed upward is reflected, the upper wall of the heating chamber 11 has a heat insulating effect, and the upper wall surface can be prevented from becoming hot.

This prevents electrical components such as the magneto port 12 from overheating, and also leads to the realization of a high-frequency heating device that has a long life and is less prone to failure.

As described above, according to the present invention, the heating effect is high, and the heating wire can be easily replaced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional high-frequency heating device, Fig. 2 is a side sectional view of a high-frequency heating device according to an embodiment of the present invention, and Fig. 3 is a sectional view of a conventional high-frequency heating device.
The figure is an enlarged cross-sectional view of the heater portion of the device □. 11... Heating chamber, 12... 1... Magnetron, 13... Wire mesh, 14... Sub-heating chamber, 15... Heater fixing metal fittings. , 16, 17...
... Heater support, 18 ... Pipe, 19
...Heating wire.

Claims (1)

[Scope of utility model registration request] A sub-heating chamber is provided in or outside the heating chamber, separated from the heating chamber by a wire mesh, with an open side. Inside this sub-heating chamber, heating wires are housed in a pipe made of heat-resistant insulator, and a heat-reflecting plate is placed inside the sub-heating chamber. A high-frequency heating device in which a heater assembly fixed to a heater fixing bracket is integrally fixed in a detachable manner through the opening.