KR20230053914A - Tunnel type complex drying system - Google Patents

Abstract

The present invention provides a tunnel type complex dryer comprising: a tunnel-type drying room body that dries raw materials, extending long in one direction, and having an empty interior; a conveyor system that extends from the entrance to the exit of the tunnel-type drying room, inputs the raw materials, moves the raw materials in one direction inside the drying room, and then discharges the raw materials to the exit; a light emission unit that is a heat source for applying energy to the dried raw materials and including a plurality of infrared lamps uniformly disposed inside the drying room; a light emission unit position control unit that can adjust the vertical position differently for each lamp or for a group of lamps for each drying section; a vibration unit that is placed at the bottom of a conveyor and applies vibration to the dried raw materials transported while seated on a conveyor surface; an air flow system that removes moisture from the raw materials inside the drying room, discharges air, and generates air flow for each area of the drying room; and an integrated control unit that changes the drying operation and drying process according to the characteristics of the raw materials. According to the present invention, an optimal drying process that simultaneously considers drying efficiency and energy efficiency can be provided.

Description

Tunnel type complex drying system {Tunnel type complex drying system}

The present invention relates to a tunnel-type dryer, and more particularly, proposes a new complex dryer capable of optimizing drying efficiency and energy efficiency as a dryer in which raw materials are continuously moved.

Drying corresponds to an old technology used for drying raw materials and parts in high-tech industries such as dry processing of agricultural and marine products, drying of laundry, medicine, microbes, and electronics. Although the drying process is a core field of industrial processes with a high proportion of energy consumption, low energy efficiency causes huge energy loss. Drying quality of the object may deteriorate.

On the other hand, in the case of dry food, the color, flavor, shape, texture, etc. vary according to the drying process, but there is a problem in that it is difficult to precisely control the drying operation due to changes in the external environment such as weather or season around the dryer.

In the case of hot air dryers, which are mainly used for food drying, various technologies have been developed to improve drying efficiency such as uniform drying and rapid drying and to save energy, but technology development has been carried out piecemeal for each element technology, and the drying process in terms of the quality of the object to be dried In the meantime, the technology to control the integrally according to the drying step has been insufficient. Various drying methods such as a convection method, a heat conduction method, and a radiation method are used for drying food, and dryers using hot air have been widely used to dry grains, vegetables, meat, and the like. Hot air drying has the advantage of being able to quickly dry the object to be dried, but in order to achieve uniform drying, precise design of arrangement of heaters or fans in the dryer is required, and in order to develop a drying process to reduce energy consumption in the drying process, There is a disadvantage in that manufacturing cost increases in the case of a high-efficiency dryer because a lot of additional devices are required.

Conventionally, various drying technologies that can be used for drying food such as agricultural products have been proposed. According to Patent Application No. 10-2007-0132979, it is a drying system that defrosts frozen agricultural products by supplying hot air. , A damper is installed on one side to control the supply of air flowing in from the drying room at the same time as the supply of hot air, and a damper that can automatically or semi-automatically control the inflow direction of the hot air at the rear of the drying room is provided to configure the blower fan and heater The hot air generated by the operation of the dryer is uniformly distributed and supplied to the top and bottom of the drying chamber, and the moisture generated in the drying chamber is discharged through the outlet and sucked in through the suction duct at the same time, and blown again by the blowing fan. are providing

In addition, according to Patent Application No. 10-2010-0125751, a transfer unit having a plurality of conveyors in a tunnel-type box structure with front and rear openings; a light irradiation unit for disposing a plurality of near-infrared ray lamps on at least one side of the conveyor; a pre-processor installed to repeatedly perform a previous process on the path of the transfer unit; and a ventilation unit including an intake fan and an exhaust fan along the path of the transfer unit.

These technologies have the advantage of increasing drying efficiency by circulating and supplying hot air in a closed drying room or using a conveyor in an open drying room for continuous mass drying, but there are limitations in applying an optimized drying process for dried raw materials. However, there is a disadvantage in that it is difficult to control drying conditions for manufacturing high-quality dried products.

In order to improve the quality of dried foods, an active intelligent drying control technology is required that can control the drying process as a whole or by detailed factors in consideration of the drying environment and the characteristics of objects to be dried. In addition, in the case of a food dryer, it is necessary to obtain a dual effect of increasing drying efficiency and reducing energy consumed during drying, and it is necessary to derive an optimal process for saving energy in conjunction with the drying step.

In particular, when the light irradiation method is adopted in a continuous dryer, it is necessary to easily control the light irradiation according to the characteristics of the dried raw material, and when drying air such as hot air is supplied in parallel to the open structure drying room, the air flow is controlled to increase the drying efficiency. There is a need.

The present invention was conceived under the above-described technical background, and an object of the present invention is to provide an optimal drying system considering the characteristics of an object to be dried and the quality of a final dried product.

Another object of the present invention is to provide a novel food dryer capable of selectively or collectively controlling the intensity of drying energy, the position of a heat source, and the air circulation or flow mechanism according to drying steps.

Another object of the present invention is to provide a combined dryer for food capable of providing an optimal drying process in consideration of drying efficiency and energy efficiency.

Furthermore, another object of the present invention is to provide a dryer that generates a complex air flow so that dry air is supplied in a turbulent flow to dried raw materials continuously moving in a tunnel type drying chamber.

Other objects and technical features of the present invention will be presented in more detail in the following detailed description.

In order to achieve the above object, the present invention is a tunnel-like structure in which the drying chamber for drying the raw material extends long in one direction and has an empty inside, and has an entrance at one end and includes a drying unit in the inner middle area and an outlet at the other end. It is a conveyor system that extends from the entrance to the exit of the drying room body and the tunnel-type drying room to input raw materials, move them in one direction inside the drying room, and then discharge them to the exit. Energy is efficiently supplied from the heat source, and moisture discharge and air circulation are easy. The conveyor body formed in a mesh structure, the drive shaft disposed at the bottom or side of the drying chamber, the entrance and exit of the drying chamber, and the driving motor interlocked with at least one of the driving shafts and the operation of the driving motor are changed to adjust the conveying speed of the conveyor body differently for each raw material A conveyor system including a control unit, a light irradiation unit including a plurality of infrared lamps uniformly disposed inside the drying chamber as a heat source for applying energy to raw materials, and each lamp to vary the degree of heat energy applied to each dried raw material or drying section. A light irradiation unit position adjusting unit that can automatically or manually adjust the vertical position differently for the lamp group or for each lamp group for each drying section, a vibration plate disposed below the conveyor and directly vibrating the dried raw material being transported while seated on the conveyor surface, and the above Vibration motor that transmits external force to the diaphragm and vibration control unit that controls the amount and time of vibration by changing the speed of the vibration motor, removes moisture from the raw material inside the drying room, discharges air, and generates air flow for each area of the drying room As an air flow unit, an intake unit for introducing external air into the drying chamber, an air flow pipe for inducing air flow in the drying chamber, an air supply unit for irradiating air to dried raw materials transported on a conveyor, and an exhaust unit for discharging air from the drying chamber to the outside. air flow system including conveyor speed control, vibration unit ON/OFF and vibration control, light irradiation unit ON/OFF and light irradiation control for each section in the drying room, and exhaust and air supply control for each drying section. and a display-type control panel outside the drying chamber to provide a tunnel-type complex dryer including an integrated control unit that changes drying operations and drying processes for each raw material characteristic.

In the present invention, the tunnel-type drying room is divided into at least three or more sections to which heat sources, air circulation, vibration, etc. are applied differently, and a plurality of lamps are equally disposed in each divided area inside the drying room. it is desirable to be

In the complex dryer of the present invention, a plurality of air flow pipes are disposed on the inner side of the drying chamber so that the dry air for discharging moisture in the drying chamber becomes a turbulent flow, and the lower part of the air flow pipe is connected to the air supply part at the lower part of the drying chamber. In addition, an exhaust fan may be mounted on an exhaust part of an upper part of the drying chamber above the air flow pipe, and a perforated plate for introducing dry air into the drying chamber from the upper part of the air flow pipe may be disposed.

In the present invention, it is preferable that the plurality of air flow pipes on the side of the drying chamber are asymmetrically arranged on the inner surface of the drying chamber to uniformly supply air to the conveyor without interfering with air flow and circulation in each area inside the drying chamber.

In addition, in the present invention, it is preferable that the perforated plates are disposed alternately between the light irradiation units in the drying chamber so as not to block light irradiated to the dried material from the light irradiation units.

According to the present invention, by selectively or collectively controlling the intensity of drying energy, the position of a heat source, air circulation or flow mechanism according to the drying step, an optimal drying process considering the characteristics of the object to be dried and the quality of the final dried product can be implemented. there is.

The present invention also generates a complex air flow so that dry air is supplied in a turbulent flow to the dried raw material continuously moving in the tunnel type drying chamber, while adding vibration to the dried raw material being dried through a heat source in the drying chamber. It is possible to provide a combined dryer for food that performs drying.

In addition, according to the present invention, it is possible to provide an optimal drying process considering drying efficiency and energy efficiency at the same time, thereby achieving high added value of dried foods and organic development of related industries.

Figure 1a is a schematic view showing the composite dryer of the present invention
Figure 1b is a photograph showing the appearance of the complex dryer
Figure 2 is a photograph showing the light irradiation unit position adjusting device
Figures 3a and 3b is a photograph showing the vibration unit installed in the complex dryer
4a and 4b are schematic cross-sectional views showing the air flow structure inside the drying chamber;
5 is a schematic diagram showing an asymmetric cross arrangement structure of air flow pipes inside the drying chamber;
6a and 6b are schematic diagrams and photographs showing a cross arrangement structure of an air supply unit and a lamp
Figure 7 is a schematic diagram showing the inner compartment area of the drying chamber of the complex dryer
8 is a comparison photo of carrot drying using a complex dryer and a hot air dryer
9 to 12 are graphs showing the results of pH, total polyphenol content (TPC), vitamin C, and DPPH radical scavenging activity for carrots with different drying methods, respectively.

The present invention, as a complex system for drying food such as agricultural products, proposes a new complex dryer that is easy to control the drying process for dried raw materials and, in particular, makes the air flow supplied to the tunnel type drying chamber into a turbulent complex air flow.

The complex dryer of the present invention is a device particularly useful for drying agricultural products such as vegetables, fruits, and grains. It is characterized by providing a complex drying method that uses a method (IR light source, etc.), adds a vibration means to a part of the conveyor, and supplies a turbulent air flow into the drying chamber. Using the complex dryer of the present invention, the drying process can be controlled according to the characteristics of each raw material and each final product, and it is easy to secure drying data for various raw materials, and the obtained data can be used for new product development.

Hereinafter, the technical configuration and effects of the combined dryer of the present invention will be described in more detail with reference to the drawings through preferred embodiments.

Figure 1a is a schematic diagram showing a tunnel-type complex dryer 100, Figure 1b is a photograph showing the appearance of the complex dryer. The complex dryer includes a drying room in which heat treatment of the dried raw material is continuously performed, a conveyor for conveying the raw material, and a vibrating unit for applying vibration to the dried raw material. The drying room 110, in which raw materials are dried, is a tunnel-like structure that extends in one direction and has an empty interior, and includes an entrance at one end, a drying unit in the middle of the interior, and an exit at the other end. The drying chamber is composed of a partition wall and a frame, and a plurality of intake/exhaust units for supplying hot air or discharging moisture to the oven chamber may be connected to upper and lower parts of the main body of the drying chamber. For example, the intake unit 112 and the exhaust unit 114 may be installed at the lower part of the drying chamber, and the positions of the intake unit and the exhaust unit may be different. Although the tunnel-type drying room is an integral structure, it is preferable that the inner drying space is divided into at least three or more sections in which heat sources, air circulation, and vibration are applied differently, which will be described later.

A conveyor system for transporting raw materials is provided in the drying room of the complex dryer. The conveyor 130, which extends from the entrance to the exit of the tunnel-type drying room, inputs raw materials, moves them in one direction inside the drying room, and then discharges them to the exit, is a mesh type that efficiently supplies energy from a heat source and is easy to discharge moisture and circulate air. A conveyor is preferable, and in particular, the mesh type conveyor has the advantage that vibration can be directly applied to the raw material by a vibrating plate or the like, and thermal energy can be supplied to the raw material by a lower heat source. In the conveyor system, driving shafts may be disposed at the entrance and exit of the drying chamber and inside (bottom or side) of the drying chamber, a driving motor is interlocked with at least one of the driving shafts, and the speed of the driving motor is controlled by a control unit to set the conveyor speed for each raw material. You can do it differently.

In the complex dryer, a light irradiation unit 120 is included as a heat source that applies energy to the dried raw material, and a plurality of means such as IR lamps are uniformly arranged in the drying chamber, while heat energy is more efficiently radiated into the drying chamber to dry the raw material An additional means capable of increasing efficiency is provided. For example, a diffuse reflection film may be attached to an inner wall of the drying chamber to increase the energy efficiency of a heat source, and IR lamps may be disposed not only above the conveyor where dried raw materials are transported but also below the conveyor. In addition, in order to vary the degree of heat energy applied for each dry raw material or for each drying section, a light irradiation unit position control unit capable of automatically or manually differently adjusting the vertical position for each IR lamp or for each IR lamp group for each drying section It is desirable to provide 2 is a photograph showing the light irradiation unit position adjusting device in a state in which the side of the complex dryer is opened, and the vertical position of the lower IR lamp (white rod) can be adjusted differently by rotating the upper circular handle. Unlike these manual adjustments, automatic position adjustment for each lamp is also possible by having a motor and a control unit.

The combined dryer of the present invention is a tunnel-type dryer, which has a conveyor belt inside and employs a light irradiation drying method, while adding a means for applying vibration to the conveyor. The vibrating unit 140 Vibration is directly applied to the conveyor for transporting raw materials and the dried raw materials being transported to increase drying efficiency, as well as to perform a roasting function for the dried raw materials and to prevent the raw materials from being attached/adsorbed to the conveyor. The vibration unit includes a plate-shaped metal structure (vibration plate) disposed at the bottom of the conveyor in the drying room, a vibration motor that applies external force to the vibration plate, and a vibration control unit (vibration ON/OFF switch, etc.) that controls the amount and duration of vibration by changing the speed of the vibration motor. can include Figure 3a is a picture of the exit side of the drying chamber of the complex dryer, showing a vibration unit disposed under the conveyor, and Figure 3b is an open side of the complex dryer, showing a hydraulic motor as an example of a vibration plate of the vibration unit and a vibration means for applying external force. It is preferable to place a vibrating plate so that the vibrating part installed in the tunnel-type body comes into contact with the lower surface of the conveyor on which the dry raw material is seated and moved. Disposing the external force transmission device on the lower side or outside of the complex dryer is advantageous in controlling the on/off operation and can prevent the drying material from directly falling into the external force transmission device. The section or region where vibration occurs can be limited to a specific region or section inside the tunnel-type body, and the vibration drive unit can start or stop vibration by manual control by an operator. The intensity of vibration may be automatically controlled differently depending on the type and moisture content of the object to be dried.

By adding a vibration part along with a light irradiation type heat source inside the main body of the tunnel-type complex dryer, uniform drying is possible by increasing the heat treatment and mixing efficiency of the raw material during transportation, and it is suitable to maintain the outer appearance by preventing the raw material from sticking to the conveyor. In the heat treatment process, an external force is applied to the raw material to impart kinetic force, thereby giving the raw material a roasting effect. In addition, in addition to the air flow system described later, the overall drying time can be shortened and the effect of reducing loss of nutrients can be expected by parallelizing the vibration process in the heat treatment process of the complex dryer. In particular, the vibration unit does not simply vibrate only a portion of the conveyor to instantly change the vertical position of the original material, but is provided with a vibration plate to apply vibration to the conveyor and the original material for a certain section, and moves the position of the vibration unit, or the vibration speed and amount of vibration By controlling the drying process by a heat source, a complex drying operation interlocked is possible.

The complex dryer of the present invention is provided with a unique air flow system for removing moisture from raw materials, efficient air circulation, and controlling air circulation for each area of the drying room inside the drying room. This flow system is designed so that the light irradiation unit (IR lamp) and the air supply line do not interfere, so that natural air circulation and moisture discharge are achieved. It can also assist with motion.

The drying room (drying space) where the conveyor transferred from the complex dryer is placed is a semi-enclosed space where the inflow and outflow of outside air can be controlled. It must be able to be discharged to the outside through the air passage.

A general drying room air circulation method includes an air circulation fan installed inside the drying room and an exhaust blower installed at another location inside the drying room to discharge dry air to the outside to generate one-way air flow or flow. While this air flow is suitable for non-continuous dryers using trays (trolleys), it may hinder the maximum supply of drying energy supplied through a heat source in the drying chamber to the object to be dried, reducing energy efficiency. In particular, in a continuous dryer using a conveyor, it is not easy to discharge moisture from the object to be dried, and it is difficult to quickly discharge moisture from the drying room to the outside.

In the tunnel-type drying room, the dried raw material continuously moving through the conveyor generates a complex air flow instead of a simple one-way flow in the drying chamber, so that the residence time of the air in the drying chamber is increased and the drying air flow is provided uniformly to the dried raw material. there is The combined dryer of the present invention arranges a suction motor (pump) in the intake part of the lower part of the drying chamber and attaches an exhaust fan to the exhaust part of the upper part of the drying chamber to interlock with the air circulation path, while supplying air to the air flow pipe on the side of the drying chamber and the drying chamber. It has a circulation flow path including a perforated plate, has an asymmetrical design of the air supply unit for each drying section, and has the characteristics of arranging the perforated plate for air supply alternately with the IR lamp.

4A and 4B are cross-sectional schematic diagrams showing an air flow structure inside the drying chamber, wherein a plurality of air flow pipes 150 are disposed on the inner side of the drying chamber so that the drying air for discharging moisture in the drying chamber becomes a turbulent flow. , The lower part of the air flow pipe is connected to the air supply unit (112, suction motor or pump, etc.) at the bottom of the drying chamber, and an exhaust fan (not shown) is installed in the exhaust part 114 of the upper part of the drying chamber above the air flow pipe. A perforated plate 160 is disposed to introduce dry air into the drying chamber from the top of the flow pipe. The upper surface of the perforated plate is closed and a plurality of air supply holes are formed only on the lower surface so as to supply dry air to the dried raw material transported through the conveyor. The dry air moved from the air supply unit through the side air flow pipe is transferred from the perforated plate to the conveyor 130, and after removing the moisture of the dried raw material, it moves upward through another space in the drying chamber and exits through the exhaust unit. In this process, the drying air does not flow in one direction but rotates in a spiral like a whirlwind, and turbulent flow is caused by crossing the air flow pipes on both sides of the drying chamber instead of arranging them in a straight line.

Figure 5 is a schematic diagram showing the arrangement structure of the air flow pipe inside the drying chamber, in the complex dryer of the present invention, a plurality of side air flow pipes are asymmetrically designed to cross the inner surface of the drying chamber to cause turbulent flow or turbulent flow, and also air flow and circulation Mutual interference is prevented from occurring in each section of the drying chamber so that uniform air flow and flow are generated over the entire length of the drying chamber. By interlocking the asymmetrical cross-arranged side air flow pipes with the perforated plate, which is the air intake and air supply, it is possible to contribute to the improvement of drying efficiency by controlling the air flow in the drying chamber even without an additional air circulation device. By supplying hot air to the intake unit, a complex drying operation can be assisted together with the light irradiation unit in the drying chamber.

In addition, in the complex dryer of the present invention, the perforated plates for supplying air to the conveyor are alternately disposed between the light irradiation units installed in the drying chamber so as not to block the light irradiated to the dried raw material from the light irradiation units. 6a and 6b are schematic diagrams and photographs showing a structure in which an air supply unit and lamps are alternately arranged, and a perforated plate is disposed between individual lamps of a light irradiation unit or a perforated plate is disposed between a plurality of lamp groups so that the perforated plate does not interfere with the light irradiation unit. . In addition, the light irradiation unit and the perforated plate are regularly arranged in the inner space of the drying chamber so that uniformity of air supply or flow is maintained throughout the entire drying space of the drying chamber.

In this way, by designing a unique air circulation or flow system for moisture removal of raw materials, efficient air circulation, and air circulation control for each drying room area inside the drying room of the complex dryer, the light irradiation unit (IR lamp) and the air supply line do not interfere. Natural air circulation and moisture discharge can be achieved.

In addition, in order to improve drying efficiency and durability of the dryer, the complex dryer may add a means for preventing the raw material from falling from the conveyor, and may simultaneously dry the top and bottom of the object to be dried by adding a height change unit for the position of the original material.

On the other hand, the complex dryer of the present invention may individually perform conveyor transfer control, vibration unit control, light amount and position control of the light irradiation unit, etc., but is provided with a separate integrated control unit (not shown) to control the conveyor transfer speed, East ON/OFF and vibration control, number of ON/OFF light irradiation parts and light irradiation amount (temperature) for each section in the drying room, height control of light irradiation part (in case of automatic height control), air circulation control for each drying section, exhaust volume per section Control and air supply control for each section may be performed integrally. For example, the integrated control unit may have a display-type control panel outside the drying chamber, and set a specialized drying process by changing a drying operation for each characteristic of the dried raw material.

In this regard, it is possible to differentially control the drying operation for each drying section. In the complex dryer of the present invention, the drying chamber has a tunnel-type structure and is formed long in the transfer direction of the object to be dried. In the drying chamber, individual housings capable of setting the temperature for each area are partitioned, and the light irradiation unit, diffuse reflection member, and heat wire are arranged for each housing. It is to control each process by raw material and drying step by changing the etc.

7 is a schematic diagram showing the operation of each partitioned area after partitioning the interior space of the drying chamber of the complex dryer, and placing the diaphragm 140 in the center of the tunnel-type main body 110 to perform the complex drying process in the first step (I). ), the second step (II), and the third step (III) may be sequentially performed, and the heat treatment of the first step, the second step, and the third step may be overlapped by changing the position of the diaphragm. It is also possible to place the diaphragm in several places inside the tunnel body and adjust it differently at the center, inlet side, and outlet side inside the body. In addition, after dividing the inside of the drying room of the complex dryer into three or more areas, the dry raw materials transported through the conveyor are controlled in each 'section' by controlling the amount of light in the light irradiation unit, humidity control, and exhaust circulation control, so that the drying process is faster than normal dryers. A finished product is obtained, and various textures can be obtained by controlling speed, temperature, etc. according to the processed raw material. In addition, the inner space of the drying room is divided into a plurality of housings, the temperature of each housing is controlled by changing the vertical position of the light irradiation unit, and the process conditions of individual housings are controlled according to the raw material by changing the position of the vibration unit and whether or not to vibrate. Even if fruit and grain raw materials are sequentially put into the dryer, it is possible to process each raw material and produce products continuously.

Tunnel type drying room and conveyor system are drying systems that can be used particularly effectively for drying agricultural products and are suitable for continuous mass drying. In addition, a light irradiation drying method, a system capable of complex air flow in the drying room, and a vibration unit capable of performing a stir-fry function by applying direct vibration to the dried raw material are provided, so that the drying efficiency in terms of process and the quality of the dried product can be improved.

In order to confirm the drying ability of the complex dryer according to the present invention, the drying operation was compared with the hot air dryer. Carrots from Jeju were dried at 70 °C, and 1.5 to 2 hours were sufficient for the complex dryer, while the hot air drying took more than 2.5 hours to achieve a water activity of less than 0.60 Aw. After completion of drying, there was no significant difference in the color of dried carrots between the complex dryer and the hot air dryer, but in the case of hot air drying, it was confirmed that the shape of the dried product was greatly distorted compared to the complex dryer (see FIG. 8).

As a result of checking the pH of the dried carrots, it was found that the pH of the carrots in the complex dryer was low (see Fig. 9). It is considered to produce dry matter.

In the case of moisture content, carrots dried with the complex dryer showed a significantly lower content than hot air drying. In the case of hot air drying, it takes 3 hours to dry, but in the case of the complex dryer, it takes less than 2 hours, so the drying time is higher. It can be seen that the efficiency is shown. In this regard, as a result of confirming the total polyphenol content (TPC), vitamin C and DPPH radical scavenging ability of carrots dried using a complex dryer and a hot air dryer, the total polyphenol content showed a significantly higher value in the complex drying method (Fig. 10), the content of vitamin C was also higher, with hot air drying of 17.168 mg/100g and complex drying of 27.579 mg/100g (see FIG. 11). In the case of vitamin C, it is known that it is weak against heat. The high vitamin C content of carrots in the multi-purpose drying machine, which is further dried, is judged to be due to the multi-drying that completed drying in a shorter time compared to hot air drying. In addition, as a result of comparing the activity by setting the sample concentration required to scavenge 50% of DPPH radicals as IC50, the dry carrot using the complex dryer of the present invention was 15.60 mg/mL in the case of the hot air dryer and 14.29 mg/mL in the case of the complex dryer. It was confirmed that radicals could be scavenged at this lower concentration (see FIG. 12).

The complex dryer of the present invention optimizes the drying process according to the type and characteristics of the raw material by changing the conveyor speed, the amount of light (temperature) of the light irradiation unit, and the vertical position of the light irradiation unit related to the drying time of the dry raw material loaded into the drying chamber. can

For Jeju-produced tangerines, three varieties, including extremely early, early, and middle-ripening varieties, were cut into 5mm, 4mm, and 5mm thicknesses, respectively, and drying time and vertical position of the light irradiation unit (from the upper surface of the conveyor) were prepared in the complex dryer of the present invention. Based on the vertical distance of the surface of the IR lamp), while changing the light amount (temperature) of the light irradiation part, the drying results were investigated and shown in Tables 1 to 3. By changing the vertical position of the light irradiation unit, it was confirmed that the desired drying result could be obtained even if the drying time was shortened or the temperature of the light irradiation unit was lowered. hope to be able to

After cutting Jeju beets into 3mm, 4mm, and 5mm thicknesses, respectively, as another original product, the drying time and the amount of light (average temperature) of the light irradiation part were changed in the complex dryer of the present invention, and the drying results were investigated and shown in Table 4. was The vertical position of the light irradiation part was kept the same at 12 cm, and drying was carried out in summer (July) and winter (January), respectively, considering that the humidity and drying environment were different for each season. Depending on the slice thickness of the raw material, the effect of drying time and average temperature was different, and it is expected that this drying result can be improved to a certain level or more by changing the vertical position of the light irradiation part as in the previous example of drying tangerines.

The combined dryer proposed in the present invention can perform drying operations for various agricultural products, has excellent drying efficiency for vegetables and fruits, can produce stir-fried grain foods, and can contribute to the high quality of dried products. In particular, since the drying process can be controlled for each drying condition for each dried raw material, it is easy to secure drying experiment data for each raw material, and based on this, it is expected to be actively used in the development of new dried foods.

Although the present invention has been illustratively described through preferred embodiments above, the present invention is not limited to such specific embodiments, and various forms are provided within the scope of the technical idea presented in the present invention, specifically, the claims. may be modified, changed, or improved.

100: complex dryer 110: tunnel type drying room
112: intake part 114: exhaust part
120: light irradiation unit 130: conveyor
132: support frame 140: vibration unit

Claims (5)

The drying room in which drying of raw materials is performed is a tunnel-like structure that extends in one direction and has an empty inside, and has an entrance at one end, a drying unit in the middle of the interior area, and a drying room main body including an exit at the other end;
It is a conveyor system that extends from the entrance to the exit of the tunnel-type drying room, inserts raw materials, moves them in one direction inside the drying room, and then discharges them to the exit. Energy is efficiently supplied from the heat source, and the mesh structure is easy to discharge moisture and circulate air. Containing a conveyor body, a drive shaft disposed at the bottom or side of the inside of the drying chamber, the entrance and exit of the drying chamber, a driving motor interlocked with at least one of the driving shafts, and a control unit that adjusts the conveying speed of the conveyor body differently for each raw material by changing the operation of the driving motor. conveyor system,
A light irradiation unit including a plurality of infrared lamps uniformly disposed inside the drying chamber as a heat source for applying energy to the dried raw material;
A light irradiation unit position control unit capable of automatically or manually differently adjusting the vertical position for each lamp or for a group of lamps for each drying section in order to vary the degree of heat energy applied to each dry raw material or drying section;
A diaphragm disposed below the conveyor and directly applying vibration to the dried raw material being transported while seated on the conveyor surface, a vibration motor that transmits an external force to the diaphragm, and a vibration control unit that controls the amount and time of vibration by changing the speed of the vibration motor A vibrating unit comprising
An air flow unit that removes moisture and discharges air from the raw material inside the drying room and generates air flow for each area of the drying room. An air intake unit that introduces outside air into the drying room, an air flow pipe that induces air flow in the drying room, and dried raw materials transported on a conveyor An air flow system including an air supply unit for irradiating air to the air, an exhaust unit for discharging air from the drying chamber to the outside, and
Conveyor transfer speed control, vibration unit ON/OFF and vibration control, light irradiation unit ON/OFF and light irradiation control for each section in the drying room, and exhaust and air supply control for each drying section can be integrated. Including an integrated control unit that has a display-type control panel and changes the drying operation and drying process for each raw material characteristic
Tunnel-type combined dryer.
According to claim 1,
In the tunnel-type drying room, the inner drying space is divided into at least three or more sections in which heat sources, air circulation, vibration, etc. are applied differently, and a plurality of lamps are equally distributed in each divided area inside the drying room. Characterized in that Tunnel-type combined dryer.
According to claim 1,
A plurality of air flow pipes are arranged on the inner side of the drying chamber so that the dry air for discharging moisture in the drying chamber becomes a turbulent flow, the lower part of the air flow pipe is connected to the air supply part in the lower part of the drying chamber, and the upper part of the drying chamber is upward of the air flow pipe. Tunnel-type complex dryer, characterized in that an exhaust fan is mounted on the exhaust portion of the air flow pipe, and a perforated plate for introducing dry air into the drying chamber from the top of the air flow pipe is disposed.
According to claim 1,
A plurality of air flow pipes on the side of the drying chamber are asymmetrically arranged on the inner surface of the drying chamber to uniformly supply air to the conveyor without interference of air flow and circulation in each area inside the drying chamber Tunnel-type complex dryer.
According to claim 1,
Tunnel-type complex dryer, characterized in that the perforated plates are alternately arranged between the light irradiation units in the drying chamber so as not to block the light irradiated to the dried material from the light irradiation unit.

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