Spiral trumpet shaped microwave energy reclaiming antenna and array microwave heating apparatus thereof

Abstract

The invention discloses a spiral trumpet shaped microwave energy reclaiming antenna and an array microwave heating apparatus thereof, and relates to microwave heating technology in microwave energy application technology. In the energy reclaiming antenna, a conical trumpet cylinder (15) is eccentrically arranged on a magnetron (12) through a trumpet antenna soleplate (17); and a spiral antenna (14) is arranged on an output antenna head (13) of the magnetron (12). In the microwave heating apparatus of the spiral trumpet shaped microwave energy reclaiming antenna array, the microwave energy reclaiming antenna array is formed by arranging a plurality of spiral trumpet shaped microwave energy reclaiming antennas (1) in delta staggered mode, and radiation ports of all the spiral trumpet shaped microwave energy reclaiming antennas (1) are upward. The spiral trumpet shaped microwave energy reclaiming antenna improves microwave power output efficiency; and the microwave heating apparatus of the spiral trumpet shaped microwave energy reclaiming antenna array has the advantages of higher microwave power output efficiency and coupling efficiency, even heating and smooth moisture discharge, improves working reliability and service life of the magnetron, and saves production and maintenance cost of equipment.

Description

technical field [0001] The invention belongs to the technical field of microwave energy application and relates to industrial microwave heating technology. Background technique [0002] In the field of microwave energy application technology, two main frequency bands recommended by the International Microwave Energy Institute (IMPI), namely 915MHz and 2450MHz frequency bands, are widely used. For decades, people have created and produced many box-type or tunnel-type microwave heating applications for material heating, heating, dehydration, drying, sterilization, whitening, puffing, synthesis, extraction, vulcanization, desulfurization, etc. , in order to meet the different needs of furnace-by-furnace intermittent production and continuous production. In the continuous production of various tunnel-type multi-mode cavity applications, it is divided into two structures: high-power single-tube energy-feeding type and a large number of low-power magnetron distributed energy-feed...

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Problems solved by technology

Due to the large number of tubes (a few, dozens, hundreds or even thousands) and a single mode, electromagnetic mutual coupling is easily generated near each radiation port, resulting in a decrease in the output power of each adjacent magnetron, coupling The efficiency is reduced, and in severe cases, the magnetron will be damaged; on the other hand, the moisture and other volatiles discharged from the material during the heating process can only be ventilated and dehumidified from the side openings, which is not efficient and the effect is not good. Once pollutants such as gas enter the energy feeding port of the top magnetron, it is very easy to cause problems such as sparking outside or inside the tube, mode jumping, etc., shortening the working life of the magnetron, and even damaging the power supply.

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