CS252861B1 - Microwave heating device - Google Patents

Abstract

Microwave heating device material with planar surfaces which the thickness is comparable to the wave length in the material, it is composed of micro-wave generators energy, irradiation channel, taking o'si waveforms with the irradiation axis channel-and ulhol for ceramic materials from 60 ° to 85 ° so that its tangent is given the relative index of the lotoe of the enchanted material against the surrounding environment.

Description

The present invention provides a device for microwave heating of planar surface materials.

Microwave drying devices and heaters used so far have been used mostly in multi-point mode. Such a regimen is suitable for the irregular shape of the dried material. For thin films, the thickness of which is considerably smaller than the length of the guilt, the normal plane wave effect is used. When drying layers, which are comparable in thickness to the length of the wool in the material, both modes are disadvantageous, because there are also multiple reflections, thereby increasing the loss and radiation to the surrounding space.

These drawbacks are eliminated by the microwave heating device, the principle of which is that the waveguide axes with an axis of irradiation for the ceramic materials have an angle of 60 ° to 85 ° so that its tangent is given by the relative refractive index of the irradiated material against the rotating pro-distribution.

A schematic diagram of a micro wave heating device is shown in the attached drawing. Microwave heating apparatus for drying planar surface materials (Fig. J consists of microwaves generators 1, waveguide 2 with sliding booths 3 and irradiation channel 4. The waveguide axis 2 with the irradiation axis 4 for the ceramic materials is angled by 60 [deg.] To 85 [deg.] The planar surface material 5 is positioned along the irradiation kainal 4.

In the apparatus of the present invention, radiation and irradiation kainal may be applied to a plane polarized wave at an angle which provides minimal reflection. The choice of the brick is conditioned by the dielectric properties of the material and may be required to be completed. Such an arrangement improves the energy-binding conditions of the radiation generators because it avoids the undesirable reaction-constituent of the resulting electromagnetic blame from the material and the shadows. "You can achieve a reflection reduction of up to 50% compared to the normal impact, thus reducing the energy loss in the irradiation area and also reducing the possibility of emitting an idio-surrounding environment. Drying of solid bricks with a humidity of 22 - 24% with a thickness of 7 cm, roofing O 'with a humidity of 17%, a thickness of 2 cm and cladding materials with a moisture content of 6 ° / o are verified in the facility. In all of these cases, the surfaces hurt close to the planar surfaces, allowing for an optimum angling angle. Eahiko's doisiialhlo generators and irradiation field was close to bomogenin. In the measurement of conversion efficiency from material heating and evaporation, 95-97% utilization of high frequency energy was collected.

The invention can be used wherever microwave energy is introduced into a material with planar surfaces, whereby the thickness of the material is compared lazy with the length of the wave in the material.

Claims (1)

Microwave heating devices mate with the axis of the irradiation channel (4j for hunting with planar surface surfaces of ceramic materials angle of 60 ° to 85 °, so as obtained from microwave energy generators that its tangent is given by relative indegia, waveguides and irradiation. This is due to the refraction of the irradiated material with respect to the emanating environment of the waveguide axes (2) in a tilting environment.