JP3204729U - Microwave hot air drying equipment - Google Patents

Abstract

The present invention provides a microwave hot air drying facility that dries quickly, allows a drying object to be reversed without requiring human power, and can improve product quality. A heat treatment chamber, an upper microwave introducing device, a lower microwave introducing device, and a hot air generating device are provided. The upper microwave introduction device 20 includes an upper microwave generator 21 and an upper transmission waveguide 22. The lower microwave introduction device 30 includes a lower microwave generator 31 and a lower transmission waveguide 32. The generator 40 provides hot air that passes through the heat treatment chamber 10, and the flow direction of the hot air is maintained perpendicular to the direction in which the microwave enters the heat treatment chamber 20. [Selection] Figure 1

Description

  The present invention relates to a hot-air drying facility with the aid of microwaves, and can be applied to drying ingredients of ingredients or herbal medicines.

  Agricultural products (such as mango) may have an excessive yield due to the influence of the weather, so that the water content and water activity can be reduced by drying treatment. In addition, by combining appropriate packaging, the agricultural product can be stored at room temperature, and the quality of the agricultural product can be maintained. In general drying treatment methods for removing moisture by sun drying or hot air drying, the color and aroma of agricultural products are lost, the quality of agricultural products after drying is reduced, and a phenomenon that shrinks well is observed. In addition, as the thickness of agricultural products (for example, slicing fruits) increases, the amount of heat generated by conventional drying methods requires a relatively long time to transfer to the center of the food, so drying Since the quality becomes non-uniform, the uniformity of the dry quality can be increased by artificially inverting the food. However, the work of artificially reversing is not only labor-intensive but also labor intensive, and may be troublesome by repeatedly stopping or starting the drying and heating equipment. Therefore, the present creation provides a drying facility that quickly dries food materials or herbal medicine materials and inverts food materials or herbal medicine materials without requiring human power when drying.

  In patent document 1, the heating method of a foodstuff is disclosed. Mainly applied to the method of thawing sushi, the upper part and the lower part of the sushi are separated by continuity transporting the sushi in the upper part of the microwave (horn-6) and the lower part of the microwave (horn-7). The method of thawing each is adopted.

  Patent Document 2 discloses a microwave hot-air composite dryer. It mainly consists of an import unit, a first chamber (microwave drying process), a second chamber (hot air drying process), and an export unit (40), and is applied to the drying of large cloths. The microwave assembly of the first chamber includes a microwave leakage prevention mechanism, a waveguide, a microwave generator, and a microwave block, and the microwave generated by the microwave generator passes through the waveguide. To dry the cloth having the same area as the waveguide. In addition, microwave interference between the waveguides is blocked by the microwave blocking zone.

  In patent document 3, the drying method of a plant foliage is disclosed. The “microwave fluidized bed equipment used for drying solid granules” disclosed mainly in Patent Document 4 is applied to dry plant stems and leaves. This equipment mainly adopts a fluidized bed design, the material is placed in a three-stage filter net and installed in a fluidized bed column, and drying is performed by combining microwaves with high-speed wind speed. It has been broken. The apparatus described in this Chinese patent application is applied to relatively lightweight material processing, and the material is shaken in a meshed mesh using high speed air and simultaneously dried by microwaves. Thus, the purpose of drying quickly is achieved.

  In Patent Document 5, tunnel hot air, microwaves, and far infrared rays are combined in a dryer. The concept and application of the combined selectivity of hot air, microwave and far-infrared are mainly described, but the design of microwave structure and the heating efficiency and uniformity of microwave are not mentioned in detail.

  Patent Document 6 discloses a manufacturing method and equipment for dried fruits and dried vegetables. In the specification, fruit and vegetable materials are processed in a plurality of drying chambers by a transmission device. An adjustable microwave generator is installed on the upper side of each drying chamber, and an adjustable hot air supply device is installed on the lower side, so that the material is simultaneously dried in the drying chamber by the action of microwaves and hot air. . The equipment described in the specification of the above Japanese patent application cannot reverse the material, and the purpose of drying quickly is achieved by adjusting the output power of different microwaves by the five drying chambers. .

  In patent document 7, the hot air dryer with the assistance of the microwave which dries pickled ume is disclosed. A microwave generator is installed on the upper side of the heating chamber, and a hot air supply device is installed on the lower side. The pickled plums are treated with three sets of 1.7 kW microwaves and hot air at 50 ° C. The apparatus described in the specification of the Japanese Patent Application is processed for pickled plums with a small volume, and does not need to be reversed because the volume of the material is small. In addition, since three sets of microwave energy are simultaneously applied to a single heating chamber, the effect of reducing the microwaves is generated and cannot be used for processing a material having a large volume.

JP-A-8-89226 Korean Open Patent R20090076154A Specification Chinese Patent Application No. CN103196280B Specification China Utility Model No. CN2025221818U Specification China Utility Model No. CN202853296U Specification JP 2004-305002 A JP 2001-197861 A

  The main object of the present invention is to provide a microwave hot air drying facility that dries quickly, allows the object to be dried to be reversed without requiring human power, and can improve product quality. .

  The microwave hot air drying equipment in the present invention generates heat when microwaves act on the moisture inside the food, and at the same time, removes moisture on the surface of the food by combining with hot air, so that the drying speed and uniformity Can be increased. Compared with the conventional hot air drying method, the heating effect is uniform as a whole, the drying time is saved, and the product quality is also taken into consideration.

In order to achieve the above object, a microwave hot air drying facility completed according to the contents of the present invention includes a heat treatment chamber, an upper microwave introducing device, a lower microwave introducing device, and a hot air generating device.
The upper microwave introduction device includes an upper microwave generator and an upper transmission waveguide. The upper transmission waveguide is installed above the heat treatment chamber and forms a plurality of grooves. Therefore, the microwave generated by the upper microwave generator is limited to the upper transmission waveguide, and can only enter the heat treatment chamber by cutting a plurality of grooves.
The lower microwave introduction device includes a lower microwave generator and a lower transmission waveguide. The lower transmission waveguide is installed below the heat treatment chamber and forms a plurality of grooves. Therefore, the microwave generated by the lower microwave generator is limited by the lower transmission waveguide, and can only enter the heat treatment chamber by cutting a plurality of grooves.
The hot air generator provides hot air that passes through the heat treatment chamber. Among them, the flow direction of the hot air maintains a vertical relationship with the direction in which the microwave enters the heat treatment chamber.
It is desirable that the upper microwave generator and the lower microwave generator generate microwaves while being switched.

It is desirable that the microwave hot air drying facility of the present creation further includes one or a plurality of mounting dishes, and is disposed in the heat treatment chamber horizontally and spaced from each other.
It is desirable that the number of mounting dishes is three.
The hot air generator includes a hot air introduction mechanism and a hot air discharge mechanism, and is installed on both the left and right sides of the heat treatment chamber, respectively, so that hot air enters the heat treatment chamber by the hot air introduction mechanism and then heat treatment by the hot air discharge mechanism. It is desirable to flow out of the room.
By installing a door that can be opened and closed in the heat treatment chamber, it is desirable to place the placement dish in the heat treatment chamber and to take out the placement dish in the heat treatment chamber.

1 is a perspective view showing a microwave hot air dryer completed according to a relatively good specific embodiment of the present invention, showing an internal structure clearly, a transparent wall of a member, and two mountings; The dish is omitted and not shown. It is the perspective view which looked at the microwave hot air dryer in FIG. 1 from another angle, The door 60, the hot air introduction mechanism 41, and the hot air discharge mechanism 42 are abbreviate | omitted and are not shown in figure, All three mounting plates are shown in figure. Has been. It is sectional drawing which shows the microwave hot air dryer in FIG. It is a figure which shows the planar electromagnetic field distribution state in three mounting dishes, when one of the two microwave introduction apparatuses 20 and 30 of the microwave hot air dryer in FIG. 1 is started.

  In the following description, “upper”, “lower”, “left”, “right”, “front”, and “rear” are based on viewing an object standing upright with both eyes.

  A microwave hot air dryer completed according to a relatively good specific embodiment of the present invention is a microwave-assisted hot air dryer, and is shown in FIGS. 1 to 3. The microwave hot air dryer includes a heat treatment chamber 10, two microwave introduction devices 20 and 30, and a hot air generator 40. The heat treatment chamber 10 communicates with the two microwave introduction devices 20 and 30 and the hot air generator 40. In addition, it is possible to install three stages of placing trays 50 in which ingredients are placed. Of the two microwave introduction devices, the upper microwave introduction device 20 includes an upper microwave generator 21 and an upper transmission waveguide 22. Among them, the upper transmission waveguide 22 is provided above the heat treatment chamber 10, and the microwaves generated by the upper microwave generator 21 are formed in the upper transmission by forming a plurality of grooves 23. It is limited by the waveguide 22 and only enters the heat treatment chamber 10 by a plurality of grooves 23.

  The lower microwave introduction device 30 in the two microwave introduction devices includes a lower microwave generator 31 and a lower transmission waveguide 32. Among them, the lower transmission waveguide 32 is installed below the heat treatment chamber 10 and forms a plurality of grooves 33. Therefore, the microwave generated by the lower microwave generator 31 is limited by the lower transmission waveguide 32 and can only enter the heat treatment chamber 10 by a plurality of grooves 33.

  The rear side of the heat treatment chamber 10 is hermetically sealed, and the front side is provided with a door 60 that can be opened and closed, so that a mounting plate 50 on which ingredients are arranged is placed inside the heat treatment chamber 10. Then, drying is performed. Among them, since the upper microwave generator 21 and the lower microwave generator 31 generate microwaves while being alternated, by preventing mutual interference, it is possible to prevent the occurrence of the action of reducing microwaves, and The service life can be increased.

  The hot air generator 40 includes a hot air introduction mechanism 41 and a hot air discharge mechanism 42, and is installed on the left and right sides of the heat treatment chamber, respectively. When the drying operation is performed, the hot air enters the heat treatment chamber 10 by the hot air introduction mechanism 41 and then flows out into the heat treatment chamber 10 by the hot air discharge mechanism 42. The flowing direction of the hot air maintains a relationship perpendicular to the direction in which the microwave enters the heat treatment chamber 10.

  After the drying process is completed, the door 60 is opened, and the placing plate 50 on which the food is arranged is taken out from the heat treatment chamber 10.

  FIG. 4 is a diagram showing planar electromagnetic field distributions in three placing dishes when one of the two microwave introducing devices of the microwave hot air dryer of the present invention of FIG. 1 is activated. As shown in FIG. 4, since the electromagnetic field is evenly distributed, the two microwave introduction devices of the present invention are selected from among an upper microwave generator and a lower microwave generator according to predetermined drying conditions. Can be controlled to generate microwaves and two microwave generators to alternately generate microwaves, or to generate microwaves simultaneously.

  The microwave hot air drying equipment of the present invention uses water molecules of agricultural products (foodstuffs) themselves, and is heated by overall irradiation with microwaves, thereby directly converting electric energy into heat energy. In addition, the effect of heating evenly and quickly is achieved by transferring moisture transferred to the surface by microwave irradiation together with hot air. Microwave heating reduces the effect of the dry surface on heat and mass transfer by the moisture in the food material creating a pressure gradient. In addition, by combining with hot air convection, the dried food can have a relatively good flavor and water reconstitution. The present invention installs microwave introduction devices at the upper and lower portions, adopts a preferred three-stage structure food placing plate design in the heat treatment chamber, and preferred upper and lower microwave introduction devices However, by performing alternating irradiation on both sides of the food material, the service life of the microwave generator was increased, and it was quickly dried and achieved the purpose of reversing the food material without requiring human power.

DESCRIPTION OF SYMBOLS 10 Heat processing chamber 20 Upper microwave introduction apparatus 30 Lower microwave introduction apparatus 40 Hot-air generator 50 Mounting plate 60 Door 21 Upper microwave generator 22 Upper transmission waveguide 22, 23 Groove 31 Lower microwave generator 32 Lower part Transmission waveguide 41 Hot air introduction mechanism 42 Hot air discharge mechanism

Claims (6)

A hot-air drying facility with microwave assistance,
A heat treatment chamber, an upper microwave introducing device, a lower microwave introducing device, and a hot air generating device;
The upper microwave introducing device includes an upper microwave generator and an upper transmission waveguide, and the upper transmission waveguide is disposed above the heat treatment chamber and has a plurality of grooves. The microwave generated by the upper microwave generator is limited to the upper transmission waveguide, and enters the heat treatment chamber only by a plurality of grooves in the upper transmission waveguide,
The lower microwave introduction device includes a lower microwave generator and a lower transmission waveguide, and the lower transmission waveguide is installed below the heat treatment chamber and has a plurality of grooves. The microwave generated by the lower microwave generator is limited by the lower transmission waveguide, and enters the heat treatment chamber only by a plurality of grooves in the lower transmission waveguide.
The hot air generator provides hot air that passes through the heat treatment chamber, and a flow direction of the hot air is maintained in a relationship perpendicular to a direction in which microwaves enter the heat treatment chamber. Microwave hot air drying equipment.   The microwave hot air drying apparatus according to claim 1, wherein the upper microwave generator generates a microwave while being replaced with the lower microwave generator.   2. The microwave hot air according to claim 1, further comprising one or a plurality of mounting dishes, wherein the mounting dishes are arranged in the heat treatment chamber horizontally and spaced apart from each other. Drying equipment.   The microwave hot-air drying equipment according to claim 3, wherein the number of the placing plates is three.   The hot air generator includes a hot air introduction mechanism and a hot air discharge mechanism, and is installed on both the left and right sides of the heat treatment chamber, respectively, and after the hot air enters the heat treatment chamber by the hot air introduction mechanism, The microwave hot air drying equipment according to claim 1, wherein the hot air drying mechanism flows out into the heat treatment chamber.   By installing a door that can be opened and closed in the heat treatment chamber, the placing plate can be placed in the heating treatment chamber, and the placing plate can be taken out from the heating treatment chamber. The microwave hot air drying equipment according to claim 3.