KR20230163688A - Drying device using microwave - Google Patents

Abstract

The agricultural product drying device using micro waves of the present invention includes a frame, a chamber installed on the frame and having an internal space for drying agricultural products, an input and an outlet, and a main drive shaft rotatably installed in the internal space of the chamber. A main turntable that is supported and rotated, a rotating turntable that is respectively supported on drive shafts rotatably installed on the main turntable around the drive shaft and rotatably installed with respect to the main turntable, and a main turntable installed on the frame to drive the main turntable. A drive unit including a turntable drive unit and a rotating turntable drive unit for rotating the rotating turntable relative to the main turntable using the driving force of the main drive shaft, and a drive unit installed in the chamber and mounted on a tray installed on the rotating turntable to dry the loaded crops. It is equipped with a microwave generating means to do this.

Description

Drying device using microwave

The present invention relates to a drying device using microwaves, and more specifically, to a drying device using microwaves that can dry agricultural products while rotating and rotating a tray for drying agricultural products, especially peppers.

Drying technologies for drying agricultural and marine products include hot air drying, freeze drying, and spray drying, and an appropriate method is selected and used depending on the object to be dried.

In the case of hot air drying, which is widely used among the above-mentioned methods, energy efficiency remains at about 30%, and since agricultural and marine products are dried with relatively high temperature hot air, the color, gloss, ingredients, taste, and aroma of agricultural and marine products are deteriorated. This causes a decrease in quality, that is, a deterioration phenomenon.

To solve the problems of hot air dryers, microwave dryers that dry agricultural and marine products using microwaves have recently been used. A conventional microwave dryer disperses microwaves generated from a microwave generator into a heating chamber and dries agricultural and marine products within the heating chamber.

However, in this conventional microwave dryer, like a hot air dryer, respiration of agricultural and marine products is forced while moisture is forcibly removed, so not only various nutrients contained in agricultural and marine products are destroyed, but their quality may also deteriorate.

In particular, in the case of imported peppers, they are frozen, so in order to dry them, thawing and drying operations are performed. Therefore, there is a problem that the drying time is relatively long and a lot of energy costs are incurred. In addition, during the process of thawing frozen peppers, uniform thawing is not achieved, so the drying time for each part of the pepper is uneven, and complete drying is not achieved with hot air alone, which reduces storability. Also, when drying peppers using hot air, there is a problem that efflorescence occurs in the dried peppers.

Republic of Korea Patent Registration No. 10-1488872 discloses a continuous agricultural and marine product drying device using microwaves. The posted agricultural and fishery product drying device includes a radioactivity test and removal device having a radioactivity test unit that tests the radioactivity of agricultural and fishery products and a removal unit that removes contaminated agricultural and fishery products according to the radioactivity test results of the radioactivity test unit, and agricultural and fishery products that were not removed by the removal unit. It includes a continuous drying device that dries while being transported in a tray, and a moisture measuring device that measures the moisture of agricultural and marine products that have passed through the continuous drying device.

And in Republic of Korea Patent Publication No. 2017-0084948, a low-temperature vacuum drying device using microwaves is disclosed. The published drying device includes an external chamber having an openable lid; An inner chamber installed inside the outer chamber and having a structure that allows water vapor to pass through while blocking the outflow of microwaves to the outside; A plurality of microwave generators emitting microwaves into the interior chamber; a vacuum pump for vacuuming the external chamber and the internal chamber; It includes a heat exchanger installed in the space between the outer chamber and the inner chamber to take heat from the water vapor generated from the drying object by the microwave and condense it.

The drying device as described above can improve drying efficiency by smoothly discharging water vapor to the outside during the drying process using microwaves, but there is a problem in that sterilization and moisture discharge are not performed smoothly.

In particular, during initial drying using microwaves, moisture on the surface does not evaporate within a short period of time, which limits the ability to increase drying efficiency.

Republic of Korea Patent Registration No. 10-1967903 discloses a microwave oscillation module and an agricultural product drying device using microwaves including the same, and Republic of Korea Patent Registration No. 10-1738263 discloses a vacuum rotary dryer using microwaves.

(Patent Document 001) Republic of Korea Patent Registration No. 10-1488872

(Patent Document 002) Republic of Korea Patent Publication No. 2017-0084948

(Patent Document 003) Republic of Korea Patent Registration No. 10-1967903

(Patent Document 004) Republic of Korea Patent Registration No. 10-1738263

The present invention is intended to solve the above problems, and provides a drying device for agricultural products using microwaves, which can activate the moisture evaporation rate and increase sterilization power during the initial drying of agricultural products or prevent deterioration of the unique color of agricultural products.

Another object of the present invention is that the tray for drying agricultural products, especially peppers, can be rotated on a rotating turntable, so that microwaves can be uniformly radiated to the dried peppers, and during drying, the internal air with high humidity can be heat exchanged with the outside air. The purpose is to provide an agricultural product drying device using microwaves that can maximize drying efficiency by dehumidifying or heating it before supplying it inside.

In order to solve the above technical problem, the apparatus for drying agricultural products using microwaves of the present invention includes a frame, a chamber installed on the frame and having an internal space for drying agricultural products, and an input and output port;

a main turntable supported and rotated by a main drive shaft rotatably installed in the inner space of the chamber;

A rotating turntable that is supported on drive shafts rotatably installed on the main turntable around the drive shaft and rotatably installed with respect to the main turntable;

A driving unit installed on the frame and including a main turntable driving part for driving the main turntable and a rotating turntable driving part for rotating the rotating turntable with respect to the main turntable using the driving force of the main driving shaft;

It is installed in the chamber and installed on a tray installed on the rotating turntable, and is characterized by being equipped with a microwave generating means for drying the loaded crops.

In the present invention,

The agricultural product drying device using microwaves of the present invention can heat the moisture inside the agricultural products using microwaves, discharge it, and dry the exterior, thereby preventing the surface color of the dried agricultural products from changing significantly.

In addition, agricultural and marine products, especially imported peppers, are dried during the process of freezing or refrigeration, so they require thawing and evaporation of moisture within a short period of time. However, in the present invention, the peppers are dried using microwaves, so the peppers are used in the thawing process for drying. It can prevent the meat quality from being damaged.

In addition, the agricultural product drying device using microwaves according to the present invention improves drying efficiency because the main turntable is rotated and agricultural products are stacked on the rotating turntable installed on the main turntable and exposed to microwaves generated from the magnetron. Since the main turntable and the rotating turntable can be rotated simultaneously using one driving unit, the structure of the driving part is relatively simple.

1 is a cross-sectional view of an agricultural product drying device using a microwave according to the present invention;
Figure 2 is a cross-sectional view of an agricultural product drying device using a microwave according to the present invention.
Figure 3 is a plan view of an agricultural product drying device using a microwave according to the present invention;
Figure 4 is a perspective view showing the installed state of the drive unit of the drying device using microwaves according to the present invention;
Figure 5 is a diagram showing an excerpt of an outdoor air supply unit;
Figure 6 is a diagram showing an excerpt of the bet supply unit;

The agricultural product drying device using microwaves according to the present invention is capable of sterilizing agricultural products and minimizing the state of the dried agricultural products, especially the color change of the agricultural products and distortion of the unique taste. An example is shown in FIGS. 1 to 4. It was shown in

Referring to the drawing, the agricultural product drying apparatus 10 using a microwave according to the present invention is installed in the frame 11 with an internal space 21 for drying agricultural products and a chamber 20 having an inlet and outlet 22. A main turntable 30 is installed on the bottom of the chamber and is supported and rotated by a main drive shaft 31 rotatably installed.

And the main turntable 30 around the main drive shaft 31 is a rotating turntable that is supported by a driven shaft 41 rotatably installed with respect to the main turntable 30 and rotates separately from the rotation of the main turntable 30. (40) is installed. In addition, a tray 50 on which trays 200 for drying agricultural products are stacked is installed on each rotating turntable 40. And the frame 11 includes a main turntable driving unit 60 for driving the main turntable 30 and a rotating turntable 40 installed on the main turntable 30 using the driving force of the main driving shaft 31. It includes a driving unit 80 including a rotating turntable driving unit 70.

The chamber 20 is mounted on a tray 50 installed on the rotating turntable 40 and is equipped with a microwave generating means 100 for drying the loaded crops.

The chamber 20 includes an air supply unit 110 for supplying external air or heated air to the internal space 21, and an internal circulation unit 120 for sucking in the moist air in the chamber, dehumidifying it, and then supplying it or heating it. Includes.

The agricultural product drying apparatus using microwaves according to the present invention configured as described above will be described in more detail for each component as follows.

The chamber 20 of the agricultural product drying apparatus 10 using a microwave according to the present invention is installed to be spaced at a predetermined distance from the ground to the upper side by a frame 11, and the upper side of the chamber 20 is heated with internal air. For smooth suction, a discharge guide portion 22 that becomes tangentially narrower toward the upper side is formed. An inlet and outlet port 22 is formed on one side of the chamber 20. The inlet and outlet ports 22 may be installed on opposite sides, and a door for opening and closing the inlet and outlet ports 22 is installed. do. Meanwhile, the main turntable 30 may form the bottom surface of the chamber 20 as shown in FIG. 1.

The main turntable 30 is supported and rotated on the main drive shaft 31 installed on the frame 11. A plurality of first support rollers 33 arranged in the circumferential direction within the radius of the main turntable 23 are installed on the lower surface of the main turntable 23 and the upper surface of the frame 11 to support the main turntable 23. . In this case, a first guide 34 in the shape of a circular ring is formed on the lower surface of the main turntable 23 along the rotation trajectory of the main turntable 23.

In addition, a second support roller 43 is installed on the lower surface of the rotating turntable 40, which is supported on the driven shaft 41 rotatably installed on the main turntable 30, and on the upper surface of the main turntable 30 to prevent it from being biased to one side due to the load. ) and the second guide 44 are installed.

As described above, the driving unit 80 includes a main turntable driving unit 60 for driving the main turntable 30 using a driving source and a rotating rotation unit 60 for driving the rotating turntable 40 using the main driving shaft 31. It is provided with a turntable driving unit (70).

The main turntable drive unit 60 is equipped with a drive motor 61 installed on the frame 11, and a first drive gear 62 is installed on the drive shaft of the drive motor 61. It is preferable that the drive motor 61 uses a geared motor.

And a first driven gear 63 is installed on the main drive shaft 31 located on the lower side of the main turntable 30. And the frame 11 corresponding to the lower surface of the main turntable 30 is provided with a plurality of first connection gears 65 for transmitting the rotational force of the first drive gear 62 to the first driven gear 63. It is installed.

And the rotating turntable driving unit 70 has a second driving gear 71 on the upper side of the main driving shaft 31 of the main tentable table 30, that is, on the main driving shaft 31 protruding from the main turntable 30 to its upper side. ) is installed, and second driven gears 72 are installed on the driven shafts 41 rotatably installed on the main turntable 30, respectively. The second driven gear 72 may be installed on the driven shaft 41 exposed between the lower surfaces of the main turntable 30 and the rotating turntable 40. Additionally, a second connection gear may be installed between the second driving gear 71 and the second driven gear 72 to transmit the rotational force of the second driving gear 71 to the second driven gear 72.

The drive unit is not limited to the above-described embodiment, and the rotational force of the drive motor may be connected to a power transmission means such as a belt or pulley.

The microwave generating means 100 includes a tray 50 installed on the rotating turntable 40 and a plurality of magnetrons 101 installed in the chamber 20 on the corresponding side. The magnetron 101 may be installed in a plurality of rows in the chamber 20. Microwaves generated from the magnetron 101 are irradiated to agricultural products on the tray 20 stacked on the tray 50 through a waveguide (not shown). Here, the magnetron 101 can be used to irradiate microwaves of 915 MHz to 2.45 GHz , and the number of installed magnetrons 101 varies depending on the size of the drying equipment or the type and processing volume of agricultural and marine products to be dried. can be installed optionally.

Additionally, the magnetron 101 can be cooled when driven by a separate cooling unit (not shown). The magnetron 101 can be cooled using an air cooling method or a water cooling method that can be cooled by circulating coolant or a chiller.

As shown in FIGS. 1 and 5, the outside air supply unit 110 is used to supply outside air or heated air to the internal space 21 of the chamber 20. A first external air supply member 113 that is installed vertically and has a plurality of first injection ports 111, a first blower 112 installed in the frame 11 or the chamber 20, and the first supply nozzle unit. It is provided with a first duct 114 connecting 113 and the blower 112. The first duct 114 may include a first heating unit for heating air and a temperature measuring means for measuring the supplied temperature.

As shown in FIGS. 2 and 6, the internal circulation unit 120 sucks wet air in the chamber and exchanges heat with the outside air to supply it. It is equipped with a condensation unit 130 connected by a second duct 122 and a second blower 133 connected to the condensation unit 130 to suck internal air from the inner space of the chamber 20 to the condensation unit. do. In addition, a second injection member 135 is installed at the center of the chamber 20 and includes a plurality of second nozzles 136 for spraying dehumidified air. The second injection member 135 is connected to the second blower 133 by a second duct, and the second duct 122 is equipped with a second heating unit for heating the air supplied through the second blower 133. This can be installed.

It is preferable that the second injection member 135 forms a hollow part in the main drive shaft 31 on which the main turntable 30 is supported, and is supported on the frame through this hollow part so that it does not rotate with the main turntable 30. .

In addition, the condensation unit 130 may be equipped with a separate cooling means to dehumidify the air in the high-temperature and humid interior space. However, it is not limited to this, and the internal air of the high-temperature and high-humidity chamber may be dehumidified by heat exchange with the outside air.

When the first and second heating units are installed in the first and second ducts 114 and 122, respectively, electric heaters may be installed. In addition, the internal space of the first and second ducts and the chamber and the condensation unit are equipped with a temperature measurement unit to measure the temperature and an agricultural product drying device using the temperature information of this temperature measurement unit and information from the humidity sensor installed inside the chamber. A control unit for control may be further provided.

In order to dry agricultural products, especially imported frozen peppers, using the agricultural product drying device using microwaves according to the present invention configured as described above, place frozen peppers or harvested peppers for drying on the tray 200, This tray 200 is inserted into the tray 50 and aligned. Then, the driving unit 80 and the magnetron 10 are operated.

In this way, as the drive motor 61 of the drive unit 80 rotates, the first drive gear 62 installed on its drive shaft rotates, and is meshed with the first connection gears 63 to form the main drive gear 62. As the first driven gear 63 installed on the drive shaft 31 rotates, the main turntable 30 rotates.

And as the main turntable 30 rotates, the rotating turntables 40 installed on the main turntable 30 are rotated by the rotating turntable driving unit 70. The rotation of the rotating turntable (40) by the rotating table driving unit (70) is performed by the second driving gear (71) installed on the main driving shaft (31) and rotated, and the second driving gear (71) installed on the main turntable (30) to support the rotating turntable (40). This is achieved by meshing the second driven gear 72 installed on the driven shaft 41.

Accordingly, the agricultural products contained in the trays 200 stacked on the tray 50 are sterilized by the microwave generated from the magnetron 100, and thawing and drying begin.

Since the microwave output by driving the magnetron 100 is incident through the waveguide, the peppers spread on the tray are heated and moisture is evaporated.

As described above, in the process of drying the agricultural products contained in the tray 50 by the microwave generated from the magnetron 100, the interior of the chamber 20 is heated by operation of the second blower 133 of the internal circulation unit 130. The air in the space circulates through the second duct 122 and the second nozzle 136 of the second injection member 135, and the air circulated by the condensation unit 130 connected to the second duct 122 In other words, humidity can be removed from air containing moisture evaporated during the drying process, and drying efficiency can be increased by continuously circulating dry air heated by the magnetron.

In particular, external air is blown into the internal space 21 of the chamber by the first blower 112 of the external air supply unit 120, and the first duct 114 and the first nozzle 111 of the first external air supply member 113 are blown into the internal space 21 of the chamber. ), so the drying efficiency can be improved by increasing the circulation of air.

As described above, in the process of drying agricultural products, the microwaves emitted from the magnetron 100 penetrate into the interior of the agricultural product, red pepper, to heat and dry moisture, and simultaneously use microwaves and hot air from the outside of the agricultural product. Since it can be dried, drying efficiency can be increased, and changes in shape and color due to drying of agricultural products can be minimized.

Meanwhile, in the case of agricultural products, one of the causes that causes the most damage to storage quality is mold. According to the World Health Organization (WHO), 25% of crops around the world are contaminated with mold, causing severe economic damage. Since these fungi can be sterilized by the magnetron irradiated from the magnetron 100, damage caused by mold can also be reduced.

As described above, the agricultural product drying device using microwaves according to the present invention can dry agricultural products by microwaves and microwaves generated from a magnetron, and thus drying efficiency can be improved without changing the color of the dried agricultural products.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached registered claims.

Claims (5)

A frame, a chamber installed on the frame and having an internal space for drying agricultural products and an input and output port,
a main turntable supported and rotated by a main drive shaft rotatably installed in the inner space of the chamber;
A rotating turntable that is supported on drive shafts rotatably installed on the main turntable around the drive shaft and rotatably installed with respect to the main turntable;
A driving unit installed on the frame and including a main turntable driving part for driving the main turntable and a rotating turntable driving part for rotating the rotating turntable with respect to the main turntable using the driving force of the main driving shaft;
An agricultural product drying device using microwaves, which is installed in the chamber, is mounted on a tray installed on the rotating turntable, and includes microwave generating means for drying the loaded agricultural products. According to clause 1,
The main turntable driving unit of the driving unit includes a first driving gear on the driving shaft of the driving motor installed on the frame, a first driven gear installed on the main driving shaft located on the lower side of the main turntable, and a corresponding lower surface of the main turntable. A plurality of first connecting gears are installed on the frame to transmit the rotational force of the first driving gear to the first driving gear,
The rotating turntable driving unit includes a second driving gear installed on the main driving shaft protruding toward the upper side of the main turntable, and a second driven gear installed on driven shafts rotatably installed on the main turntable and meshed with the second driving gear, respectively. An agricultural product drying device using a microwave, characterized by having gears. According to clause 1,
The chamber further includes an air supply unit for supplying external air or heated air to the internal space, and an internal circulation unit for sucking in the moist air in the chamber, dehumidifying it, and then supplying it or heating it. Agricultural product drying equipment. According to clause 3,
The internal circulation unit is connected to the exhaust pipe formed in the discharge induction part at the upper side of the chamber through a second duct, and is installed in the center of the chamber and a second plurality of second nozzles for spraying dehumidified air are installed. Provided with a spray member,
The second duct between the second injection member and the exhaust pipe includes a condensation unit for removing moisture from the high-temperature and humid air discharged through the exhaust pipe, and a condensation unit connected to the condensation unit to collect internal air from the inner space of the chamber. An agricultural product drying device using a microwave, characterized in that it is further equipped with a second blower for sucking water to the side and spraying it to the second spraying member side. According to clause 1,
An agricultural product drying device using a microwave, characterized in that an annular first guide is formed along a rotational trajectory on the lower surface of the main turntable, and the frame is provided with a first support roller to support the first guide.

Images