CN101217836A - Rapid heating device based on microwave energy capture - Google Patents

Abstract

A rapid heating device based on microwave energy capture relates to a heating device, in particular to a rapid heating device based on microwave energy capture. Provide a method that can quickly and uniformly capture microwave energy to the heating object, use the resonance of the microwave ceramic cylinder to improve the heating efficiency of the microwave, reduce the heating time, and achieve the best match between the heating load and the microwave source, and the reflected wave tends to zero , can prolong the life of the magnetron, reduce the leakage of microwave energy, and reduce electromagnetic pollution. It is mainly used in the rapid heating device based on microwave energy capture of microwave ovens. A support body and at least one microwave ceramic cylinder are provided, and the microwave ceramic cylinder is embedded in the support body. The diameter D of the microwave ceramic cylinder is 5-120 mm, the height L is 4-20 mm, and the relative dielectric constant ε _r of the microwave ceramic is 5~150.

Description

Rapid heating device based on microwave energy capture

technical field

The invention relates to a heating device, in particular to a rapid heating device based on microwave energy capture.

Background technique

In recent years, the application of microwave heating has become more and more widespread. It will be a very meaningful work to improve the conversion efficiency of microwave energy and reduce the electromagnetic pollution of microwave heating devices.

For example, existing microwave oven heating containers are usually made of ordinary materials such as glass, ceramics, and plastics. They mainly play the role of bearing objects in the microwave oven cavity. Microwave energy directly passes through the container and oscillates back and forth inside the microwave oven cavity. The reflection produces the basic mode and various higher-order modes in the microwave cavity, and the entire cavity is unevenly filled with microwave energy, and part of it is reflected back to the magnetron and leaks to the outside of the microwave oven, causing electromagnetic pollution to the environment.

The Chinese invention patent application with the publication number CN1410736 provides a microwave continuous heating device equipped with a heating chamber and a conveying device, the heating chamber has openings in its front and rear parts, and objects to be heated are carried on the conveying device through the heating chamber. chamber, and microwave electric energy is irradiated on the object to be heated passing through the heating chamber to heat it. Two microwave absorbing chambers through which objects to be heated pass are connected to the front and rear portions of the heating chamber, respectively. A plurality of metal reflective plates are conveyed by the conveying device spaced apart from each other in forward and backward directions. The object to be heated is placed between two adjacent reflectors. The reflecting plates are placed on the transfer device such that at least one reflecting plate is placed in each microwave absorbing chamber at least during the irradiation of microwaves into the heating chamber.

The Chinese invention patent application with the publication number CN1416366 provides a microwave heating device, including a microwave generator, a waveguide for guiding the generated microwaves to a feeder, and a deflector defining a plane formed by a closed loop, said The deflector has a fixed resonant frequency and a thickness perpendicular to the plane, the deflector can be rotated about an axis at least substantially parallel to the plane, the deflector is placed in the waveguide so as to communicate with the sample and The waveguide feeder forms a resonant cavity. The resonance conditions of the resonator and the coupling factor of the radiation from the waveguide to the cavity are easily tuned by rotation of the deflector. Resonance conditions and coupling factors can be tuned in response to sample dielectric properties in order to optimize the amount of absorbed power and thus gain control over the sample heating process.

The Chinese invention patent application whose publication number is CN87101881 provides a kind of device by means of microwave energy heating. ) for the wave. The feed waveguide (3, 4) is a power divider that distributes the input power substantially equally to at least two heating inductors (7, 8; 9, 10), the heating inductors (7, 8 ; 9, 10) extend at an angle relative to the feed waveguide. A dielectric plate (11, 12, 13, 14). The heating inductors are arranged so that all the dielectric plates are on the same plane.

The Chinese invention patent application with the publication number CN1339674 provides a uniform heating device for a microwave oven, including: a magnetron for generating microwaves; a waveguide device for guiding the microwaves generated by the magnetron; a pair of circularly polarized waves radiating an opening for microwaves guided by the waveguide; and a cavity constituting a polyhedron rather than a rectangle, wherein more than one inner wall constituting the polyhedron is inclined at a predetermined angle (θ1) other than a right angle relative to adjacent inner walls. With this structure, when the microwave generated by the magnetron is radiated through the waveguide device and the opening, it is reflected into the cavity through the inclined inner wall of the cavity and transmitted to the food, thus ensuring that the microwave is evenly distributed on the whole food and makes the food get better Cook evenly.

The invention patent application with application number 02128724.4 provides a microwave oven heating container, which includes a body made of plastic, the bottom of which is made of plastic or ceramic material with dielectric properties, and a metal layer is formed on the side wall of the body; There is a metal ring at the bottom of the body; the body is equipped with a cover, and the cover is provided with a steam outlet and a safety valve; and a metal ring is set on the cover to produce an auxiliary heating effect for cooking.

Contents of the invention

The purpose of the present invention is mainly to solve the problem of wide distribution of microwave energy in the existing microwave heating equipment, and to provide a method that can quickly and uniformly capture the microwave energy to the heating object, and use the resonance of the microwave ceramic cylinder to increase the microwave energy. Excellent heating efficiency, reduced heating time, the best match between the heating load and the microwave source, the reflected wave tends to zero, which can prolong the life of the magnetron, reduce the leakage of microwave energy, and reduce electromagnetic pollution. It is mainly used in microwave ovens based on microwave energy. Captured rapid heating device.

The invention is provided with a support body and at least one microwave ceramic cylinder, the microwave ceramic cylinder is embedded in the support body, the diameter D of the microwave ceramic cylinder is 5-120 mm, the height L is 4-20 mm, and the relative dielectric constant ε of the microwave ceramic is _r is 5-150.

The supporting body can be set as a plastic plate, a glass plate, a ceramic plate or a composite material plate thereof, and the like. The support body can be set as a plate-shaped, disc-shaped, pot-shaped, box-shaped, cylindrical and other support bodies. The dimensions of the microwave ceramic cylinders can be the same or different.

Since the present invention is provided with at least one microwave ceramic cylinder, the microwave energy is captured by the microwave ceramic cylinder by utilizing the resonance of the microwave ceramic cylinder, the heating load is optimally matched with the microwave source, and the reflected wave tends to zero. Therefore, the damage to the magnetron is avoided while the heating speed is accelerated, the leakage of microwave energy is weakened, electromagnetic pollution is reduced, the heating object can be heated evenly and intensively, and the heating efficiency of the microwave heating device is improved. The present invention can be applied to various microwave heating devices in the process of heating, drying and sterilizing liquid, powder and bulk water-containing objects, especially in the process of food thawing, heating and cooking in various microwave ovens.

Description of drawings

Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view along line A-A of FIG. 1 .

Fig. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 4 is a cross-sectional view along line A-A of FIG. 3 .

Fig. 5 is a schematic structural diagram of Embodiment 3 of the present invention.

FIG. 6 is a cross-sectional view along line A-A of FIG. 5 .

Fig. 7 is a schematic structural view of the heating tray cover according to Embodiment 3 of the present invention.

Fig. 8 is a schematic structural diagram of Embodiment 4 of the present invention.

FIG. 9 is a cross-sectional view along line A-A of FIG. 8 .

FIG. 10 is a B-B sectional view of FIG. 8 .

Fig. 11 is a schematic structural diagram of Embodiment 5 of the present invention.

FIG. 12 is a cross-sectional view along line A-A of FIG. 11 .

FIG. 13 is a B-B sectional view of FIG. 11 .

Detailed ways

The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

Embodiment 1: Flexible plate-shaped fast heater

Referring to Fig. 1 and 2, the present invention is provided with support 1, 4 rows of large microwave ceramic cylinders 2, 3 rows of small microwave ceramic cylinders 3 and hook grooves 4, support 1 is a rectangular flexible plastic plate, 4 rows of large microwave Ceramic cylinders 2 and 3 rows of small microwave ceramic cylinders 3 are embedded in the support body 1, 4 rows of large microwave ceramic cylinders 2 and 3 rows of small microwave ceramic cylinders 3 are arranged alternately, and the diameter of the large microwave ceramic cylinders 2 is 15 mm. The height is 9mm, the relative permittivity _εr of the microwave ceramic is 40, the diameter of the small microwave ceramic cylinder 3 is 10mm, the height is 9mm, and the relative permittivity _εr of the microwave ceramic is 70. The hook-shaped grooves 4 are respectively arranged at both ends of the support body 1, and the support body 1 is made of flexible plastic material.

Microwave ceramic cylinders 2 and 3 of two sizes capture the basic mold and the higher-order mold respectively, and the annular body can be formed by using two pieces of the present invention. When the microwave oven is used for steaming rice or making soup, the annular body can be Wraps around the outside of the heating container to increase heating efficiency. When the microwave oven is used for thawing food, one piece of the present invention can be used to directly cover the frozen product. If the frozen product is larger, two upper and lower pieces of the present invention can be used to clamp the frozen product, and the bottom of the present invention should be placed on a plate. Facilitate the excitation of microwave energy.

Embodiment 2: Pot-shaped rapid heater

Referring to Figures 3 and 4, the present invention is provided with a pot-shaped support body 5, a pot cover 6, and microwave ceramic cylinders 7-10 of four different sizes and specifications, and the pot-shaped support body 5 is provided with a handle 11, four kinds of different sizes and specifications The microwave ceramic cylinders 7-10 are symmetrically embedded in the pot-shaped support body 5 and the pot cover 6 respectively, a handle 12 is provided on the pot-shaped support body 5 , and at least one leg 13 is provided at the bottom of the pot-shaped support body 5 . The diameter of microwave ceramic cylinder 7 is 12mm, and height is 7mm, and the relative permittivity ε _r of microwave ceramics is 45, and the diameter of microwave ceramic cylinder 8 is 10mm, and height is 7mm, and the relative permittivity ε _r of microwave ceramics is 50, the diameter of the microwave ceramic cylinder 9 is 8 mm, the height is 7 mm, the relative dielectric constant ε _r of microwave ceramics is 60, the diameter of the microwave ceramic cylinder 10 is 7 mm, the height is 7 mm, the relative dielectric constant ε of microwave ceramics _r is 70, and the pot-shaped support body 5 is made of glass material. The handle 11 , the handle 12 and the legs 13 are made of the same material as the pot-shaped support body 5 .

Embodiment 3: Disc-shaped fast heater

Referring to Figures 5-7, the present invention is provided with a disc-shaped support body 14, a pot cover 15, and four microwave ceramic cylinders 16-19 of different sizes and specifications, and the four microwave ceramic cylinders 16-19 of different sizes and specifications are symmetrically embedded respectively. Among the disc-shaped support body 14 and the pot cover 15 , a handle 20 is provided on the pot cover 15 . The diameter of microwave ceramic cylinder 16 is 12mm, and height is 7mm, and the relative permittivity ε _r of microwave ceramics is 45, and the diameter of microwave ceramic cylinder 17 is 10mm, and height is 7mm, and the relative permittivity ε _r of microwave ceramics is 50, the diameter of the microwave ceramic cylinder 18 is 8 mm, the height is 7 mm, the relative dielectric constant ε _r of microwave ceramics is 60, the diameter of the microwave ceramic cylinder 19 is 7 mm, the height is 7 mm, the relative dielectric constant ε of microwave ceramics _r is 70, and the disc-shaped support body 14 is made of ceramic material. The handle 20 is made of the same material as the disc support body 14 .

Embodiment 4: Cartridge fast heater

Referring to Figures 8-10, the present invention is provided with a cylindrical support body 21 and two microwave ceramic cylinders 22-23 of different sizes and specifications, and the two microwave ceramic cylinders 22-23 of different sizes and specifications are symmetrically embedded in the cylindrical support body respectively. 21 in. The diameter of microwave ceramic cylinder 22 is 8mm, and height is 6mm, and the relative permittivity _εr of microwave ceramics is 100, and the diameter of microwave ceramic cylinder 23 is 6mm, height 5mm, and the relative permittivity _εr of microwave ceramics is 120, The cylindrical support body 21 can be a plastic plate, a glass plate, a ceramic plate or a composite material plate or the like.

Example 5: Rigid Plate Rapid Heater

Referring to Fig. 11～13, the present invention is provided with the microwave ceramic cylinder 25～26 of rigid plate-shaped support body 24, 2 kinds of sizes and different specifications, the conveyer belt 27 that places pollen and metal shield 28. The microwave ceramics of 2 kinds of sizes and different specifications The cylinders 25 - 26 are symmetrically embedded in the rigid plate-shaped support body 24 respectively. The diameter of microwave ceramic cylinder 25 is 16mm, and height is 10mm, and the relative permittivity ε _r of microwave ceramics is 35, and the diameter of microwave ceramic cylinder 26 is 10mm, and height 8mm, and the relative permittivity ε _r of microwave ceramics is 55, Rigid plate-shaped support body 24 can adopt ceramic plate, conveyor belt 27 can adopt stainless steel plate, and metal shield 28 can adopt iron plate.

Embodiment 6: box-shaped rapid heater

Similar to Embodiment 2, the difference is that a box-shaped support is used.

Claims (3)

1. based on the nonstorage calorifier of energy capture of microwave, it is characterized in that being provided with supporter and at least 1 microwave ceramics cylinder, the microwave ceramics cylinder embeds in the supporter, the cylindrical diameter of microwave ceramics is 5～120mm, highly be 4～20mm, the relative dielectric constant of microwave ceramics is 5～150.

2. the nonstorage calorifier based on energy capture of microwave as claimed in claim 1 is characterized in that supporter is plastic plate supporter, glass sheet support body or ceramic wafer supporter.

3. the nonstorage calorifier based on energy capture of microwave as claimed in claim 1 or 2 is characterized in that supporter is plate shape supporter, dish type supporter, pot shape supporter, box-like supporter or tubular supporter.

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