WO2023080353A1

WO2023080353A1 - Agricultural product drying system of hot air drying method through temperature and humidity control

Info

Publication number: WO2023080353A1
Application number: PCT/KR2022/003268
Authority: WO
Inventors: 박종오; 박기선; 정재민
Original assignee: 씨이에스 주식회사
Priority date: 2021-11-03
Filing date: 2022-03-08
Publication date: 2023-05-11
Also published as: CN117651491A; KR102386341B1

Abstract

The present invention relates to an agricultural product drying system for controlling the temperature and humidity of the inside of a drying chamber to be an optimal condition required for drying agricultural products by repeatedly performing hot air drying and intake/exhaust operations step by step with respect to the inside of the drying chamber when drying the agricultural products, which comprises the drying chamber (100), a drying tray (200), an intake/exhaust unit (300), a hot air unit (400), a temperature and humidity measuring unit (500), and a control unit (600).

Description

Agricultural products drying system with hot air drying method through temperature and humidity control

The present invention relates to a drying system for agricultural products using a hot air drying method through temperature and humidity control, which repeatedly performs hot air drying and intake/exhaust in a drying room step by step to adjust the temperature and humidity inside the drying room to the optimal conditions required for drying agricultural products, thereby drying agricultural products. It is a technology related to an agricultural product drying system that shortens the time compared to natural drying and ensures that the agricultural products are dried in an optimal drying state.

In modern society, with the development of science and technology, many industrial fields, including agriculture, are beginning to change. The recent trend of change in the agricultural field is from a small-species mass production method to a multi-product small-lot production method for healthy and affluent well-being. is changing to

In general, farms cultivate and produce various agricultural products such as grains, fruits, and vegetables.

On the other hand, agricultural products produced in farmhouses are dried for storage and distribution, and drying of agricultural products is to reduce the moisture inside the agricultural products to a certain percentage or less. This causes problems in long-term storage and distribution, and during powdering processing, moisture above a certain ratio interferes with powdering processing.

There are two main methods of drying agricultural products: a natural drying method using sunlight and natural wind, and an artificial drying method in which drying facilities are provided and a drying environment is created in the drying facility.

The natural drying method does not incur special facilities or costs for drying agricultural products, but has the disadvantage of taking a long drying time depending on the weather and season, whereas the artificial drying method produces large quantities of agricultural products in a short time regardless of the weather or season. It has the advantage of being able to dry process.

In particular, among the artificial drying methods, the hot air drying method is a drying method that removes moisture from agricultural products by artificially generating hot air to raise the temperature inside the drying chamber to a high temperature.

However, the conventional hot air drying method does not consider humidity when drying agricultural products, so there is a disadvantage in that agricultural products cannot be dried in the final target drying state (a state in which the moisture content of agricultural products is below a certain rate).

No matter how much the temperature inside the drying chamber rises, if the moisture content contained in the agricultural products is higher than or equal to the humidity inside the drying chamber, the moisture inside the agricultural products is no longer discharged, causing a problem in that drying does not proceed. This is a result of the conventional hot air drying method considering only temperature and not considering humidity when drying agricultural products.

Therefore, in order to solve the above problems, the present invention, when drying agricultural products, repeatedly performs hot air drying and intake and exhaust of the inside of the drying room step by step to adjust the temperature and humidity inside the drying room to the optimal conditions necessary for drying agricultural products, thereby drying agricultural products. It is intended to propose a technology related to an agricultural product drying system that shortens the time compared to natural drying and ensures that the agricultural product is dried in an optimal drying state (a state in which the moisture content of the agricultural product is less than a certain percentage). The following are prior art related to this.

1. Republic of Korea Patent Registration No. 10-1601885 structure of drying room for agricultural products

2. Republic of Korea Patent Registration No. 10-1878643 Light-Heat Drying Device and Drying Method Using Light-Heat Drying Device

3. Republic of Korea Patent Registration No. 10-1872680 all-weather multipurpose dryer

An object of the present invention is to adjust the temperature and humidity inside the drying room to the optimal conditions required for drying agricultural products by repeatedly performing hot air drying and intake and exhaust for the inside of the drying room in stages when drying agricultural products.

In order to achieve the above object, the agricultural product drying system of the hot air drying method through the temperature and humidity control of the present invention,

a drying chamber 100 having an internal space of a certain size;

a drying tray 200 disposed inside the drying chamber 100 and loaded with agricultural products 20 to be dried;

an intake/exhaust means 300 for introducing external air into the drying chamber 100 or discharging air inside the drying chamber to the outside;

a hot air means 400 for heating and circulating air inside the drying chamber so that the agricultural products 20 loaded on the drying tray 200 are dried;

a temperature/humidity measurement means 500 for measuring temperature and humidity inside and outside the drying chamber 100 and providing the measured temperature and humidity information to the control means 600;

Temperature and humidity are measured after performing the primary drying control of controlling the air intake and exhaust unit 300 and the hot air unit 400 so that the agricultural products 20 to be dried are in a primary drying state using the temperature and humidity information provided by the temperature and humidity measuring unit 500. Control means 600 for performing secondary drying control for controlling the intake and exhaust means 300 and the hot air means 400 so that the agricultural products 20 to be dried are in a final dry state using the temperature and humidity information provided by the means 500 It is characterized by including.

In the present invention, when drying agricultural products, by repeatedly performing hot air drying and intake/exhaust for the inside of the drying room step by step, the temperature and humidity inside the drying room are adjusted to the optimal conditions required for drying agricultural products, so that the drying time of agricultural products is shortened compared to natural drying, , It provides the effect of making the drying state of agricultural products to the optimal drying state (a state in which the moisture content of agricultural products is less than a certain percentage).

1 is a conceptual diagram of the present invention

2 is a block diagram of the components of the present invention

3 is a detailed configuration diagram of the drying tray of the present invention

Figure 4 is an exemplary view of the drying tray movement of the present invention

5 is a detailed configuration diagram of the present invention

6 is a primary electric drying control state diagram of the present invention

7 is a first stage drying control state diagram of the present invention

8 is a secondary electric drying control state diagram of the present invention

9 is a secondary late drying control state diagram of the present invention

Figure 10 Functional example of the present invention and the platform management server

10: Drying system for agricultural products using hot air drying method through temperature and humidity control

20: agricultural products

30: platform management server

100: drying room

200: drying tray

300: intake and exhaust means

400: hot air means

500: temperature and humidity measuring means

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The agricultural product drying system (10, hereinafter referred to as 'the present invention') using the hot air drying method through temperature and humidity control of the present invention repeatedly performs hot air drying and intake/exhaust in the drying room step by step when drying the agricultural products, thereby controlling the temperature and humidity of the agricultural products inside the drying room. It is an invention that adjusts the conditions necessary for drying to be optimal, so that the drying time of agricultural products is shortened compared to natural drying, and provides the effect of enabling agricultural products to be dried to be in an optimal drying state.

1 and 2, the present invention 10 includes a drying chamber 100, a drying tray 200, an intake and exhaust unit 300, a hot air unit 400, a temperature and humidity measuring unit 500, and a control unit 600. consists of including

Specifically, the agricultural product drying system of the hot air drying method through the temperature and humidity control of the present invention,

a drying chamber 100 having an internal space of a certain size;

a hot air unit 400 that operates to dry the agricultural products to be dried 20 loaded on the drying tray 200;

The drying chamber 100 has an internal space of a certain size, and provides a space in which agricultural products 20 to be dried are arranged for drying and equipment for creating a drying environment is installed.

The drying chamber 100 may be formed as a movable structure such as a container or a fixed building structure. A movable structure such as a container can be used as the drying room 100 in a farmhouse with a spare site, and an empty building can be used as the drying room 100 in a farmhouse with an empty building.

The drying tray 200 is disposed inside the drying chamber 100 and is configured to load agricultural products 20 to be dried.

As shown in FIG. 5, a plurality of drying trays 200 are disposed inside the drying chamber, and drying shelves 210 loaded with agricultural products to be dried can be inserted in a layered structure as shown in FIG. It is a layered structure and is characterized in that it is fixedly disposed on the inner floor of the drying room 100 or moved inside the drying room 100 for drying agricultural products.

The drying tray 200 is configured to load agricultural products 20 to be dried for drying agricultural products, and the drying tray 200 is composed of a plurality so that at least one is disposed inside the drying chamber 100, and the agricultural products are loaded. Drying shelves 210 are inserted in a layered structure.

The drying tray 200 is fixedly disposed on the inner floor of the drying chamber 100 or moves inside the drying chamber 100 for drying agricultural products.

In particular, when the distribution of temperature and humidity inside the drying chamber 100 is not uniform, due to the uneven distribution of temperature and humidity inside the drying chamber 100, agricultural products (20) loaded on the drying tray 200 according to the drying position of each drying tray ) may not be uniform in the drying state. To prevent this, the drying tray 200 is moved inside the drying chamber 100.

The moving method may include a method of moving the drying tray 200 on the floor inside the drying chamber 100 and a method of moving the drying tray 200 in the air inside the drying chamber 100 .

In order to move the drying tray 200 inside the drying chamber 100, the present invention may further include a tray moving means 220.

Specifically, the tray moving means 220, as shown in FIGS. 3 and 4,

A moving rail 221 for guiding the movement of the drying tray 200;

It is characterized in that it includes a moving cart 222 coupled to the drying tray 200 in a detachable manner and installed on the moving rail 221 to move the drying tray 200 on the moving rail 221. .

Therefore, as shown in FIG. 3, when the plurality of drying trays 200 are moved so that the drying positions are changed inside the drying chamber 100 using the tray moving means 220, the temperature and humidity inside the drying chamber 100 are not uniform. Even if the distribution occurs, drying of the agricultural product 20 to be dried of uniform quality is achieved.

When the drying tray 200 is moved from the inner floor of the drying chamber 100, the tray moving means 220 is installed on the inner floor of the drying chamber 100, and the drying tray 200 is moved in the air inside the drying chamber 100 , The tray moving unit 220 is installed on the ceiling of the drying room 100. 4 shows an example in which the tray moving unit 220 is installed on the ceiling of the drying room 100.

The intake/exhaust means 300 is configured to introduce outside air into the drying chamber 100 or discharge air inside the drying chamber to the outside.

During drying, the reason for ventilating air by introducing outside air into the drying chamber 100 or discharging air inside the drying chamber to the outside is to control the humidity inside the drying chamber 100 .

No matter how much the temperature inside the drying room rises, if the humidity inside the drying room is higher than or equal to the moisture content contained in the agricultural products to be dried, the moisture inside the agricultural products to be dried is not discharged, causing a problem that drying does not proceed. This is a problem of the conventional hot air drying method in which only temperature is considered when drying agricultural products.

In order to create an optimal drying environment, the present invention heats the inside of the drying room to discharge moisture from agricultural products, and then ventilates (ventilates) the air inside the drying room when the humidity inside the drying room increases with the moisture discharged from the agricultural products. The process of lowering the humidity is repeatedly performed, and the configuration for this is the intake/exhaust means 300 whose operation is controlled by the control means 600.

Specifically, the intake and exhaust means 300, as shown in FIG. 5,

A plurality of intake fans 310 installed on the side of the drying chamber 100 to allow outside air to flow into the drying chamber 100;

A plurality of exhaust fans 320 installed on the ceiling of the drying chamber 100 to discharge the air inside the drying chamber to the outside,

The plurality of intake fans 310 operate to adjust the intake amount of external air introduced into the drying chamber 100 according to the control of the control means 600,

It is characterized in that the plurality of exhaust fans 320 operate to adjust the exhaust amount of the internal air discharged to the outside of the drying chamber 100 according to the control of the control means 600 .

The plurality of intake fans 310 are configured to be installed on the side of the drying chamber 100 so that external air is introduced into the drying chamber 100, and the plurality of intake fans 310 are controlled by the control unit 600. It operates to adjust the intake amount of external air introduced into the drying chamber 100 . For example, it operates normally or operates at 10% or 30% of the normal operating speed.

In addition, the plurality of exhaust fans 320 are configured to be installed on the ceiling of the drying chamber 100 to discharge air inside the drying chamber to the outside, and the plurality of exhaust fans 320 are controlled by the control means 600 to the drying chamber. (100) It operates to adjust the exhaust amount of the internal air discharged to the outside. For example, it operates normally or operates at 10% or 30% of the normal operating speed.

At this time, the intake operation of the plurality of intake fans 310 and the exhaust operation of the exhaust fan 320 are controlled by the control unit 600 under various operating conditions (eg, normal operation, operation at 10% of the normal operation speed, operation at 30% of normal operating speed, etc.). 600) to ventilate the air inside the drying chamber 100 so that the humidity inside the drying chamber 100 is lowered.

The hot air means 400 is configured to heat and circulate the air inside the drying chamber so that the agricultural products 20 to be dried loaded on the drying tray 200 are dried.

The hot air unit 400 generates circulating hot air under the control of the control unit 600 to heat and circulate the air inside the drying chamber 100 so that the internal temperature of the drying chamber 100 reaches a target temperature suitable for drying.

Specifically, the hot air means 400, as shown in FIG. 5,

An installation plate 410 formed in an area smaller than the ceiling area of the drying room 100 and installed at a predetermined distance from the ceiling of the drying room 100;

In order to heat the air inside the drying chamber 100, the carbon fiber heating cable 420 is installed on the installation plate 410 and the heating temperature is controlled according to the control of the control means 600,

For air circulation inside the drying chamber 100, a blowing fan 430 installed above the installation plate 410,

A plurality of hot air diverter plates 440 installed in the lower space of the installation plate 410 so that the air heated by the carbon fiber heating cable 420 is branched into the inner space of the drying chamber 100 under the installation plate 410,

A refrigerant circulation device 450 operating under the control of the control means 600 so that moisture contained in the air inside the drying chamber 100 is adsorbed,

The refrigerant circulation device 450 is characterized in that it includes a refrigerant circulation pipe 451 installed on one side inside the drying chamber 100.

As shown in FIG. 5 , the installation plate 410 is formed in an area smaller than the ceiling of the drying room 100 and is installed at a predetermined distance from the ceiling of the drying room 100 .

The mounting plate 410 provides an installation space where the carbon fiber heating cable 420 and the blowing fan 430 are installed, and at the same time, hot air generated when the carbon fiber heating cable 420 and the blowing fan 430 are operated. It functions to circulate inside the drying chamber.

That is, based on the installation plate 410, the interior space of the drying chamber is divided into an upper space of the installation plate and a lower space of the installation plate. When the carbon fiber heating cable 420 and the blowing fan 430 operate, Circulation is higher in circulation efficiency than the case where there is no installation plate 410.

If the hot air circulation efficiency in the drying chamber is high, the effect of accelerating the drying of agricultural products occurs.

The carbon fiber heating cable 420 is installed above the installation plate 410 as shown in FIG. 5 to heat the air inside the drying chamber 100, and the heating temperature is controlled by the control unit 600. It is a controlled configuration.

Here, the carbon fiber heating cable 420 heats the air inside the drying chamber by generating heat when electricity is supplied. In particular, the heating temperature of the carbon fiber heating cable 420 is variously controlled according to the primary drying control and the secondary drying control of the control means 600.

The blowing fan 430 is configured to be installed above the mounting plate 410 as shown in FIG. 5 to circulate the heated air inside the drying chamber 100 .

The reason for circulating the heated air inside the drying chamber 100 is for uniform drying quality of agricultural products. Air heated by the heat of the carbon fiber heating cable 420 must be evenly circulated inside the drying chamber 100 so that the drying quality of agricultural products dried in the drying chamber becomes uniform. To this end, the blowing fan 430 is operated to induce circulation of the heated air inside the drying chamber 100 .

As shown in FIG. 5, the plurality of hot air diverter plates 440 branch the air heated by the carbon fiber heating cable 420 into the inner space of the drying chamber 100 below the installation plate 410. (410) It is installed in the lower space.

The air heated in the upper space of the installation plate 410 is blown onto one side wall of the drying chamber when the blowing fan 430 operates, and then is dispersed into the lower space of the installation plate 410. The heated air blown and dispersed on one side wall is branched so that it is evenly distributed in the lower space of the installation plate 410 where the dried agricultural products are located.

As shown in FIG. , and a refrigerant circulation pipe 451 installed on one side of the inside of the drying chamber 100.

The air inside the drying chamber is ventilated by the intake/exhaust unit 300 during the drying process. As described above, the reason for ventilating the air inside the drying room is when the humidity inside the drying room increases due to the moisture discharged from the agricultural products to be dried, and drying of the agricultural products is hindered by the high humidity inside the drying room (the moisture content in the agricultural products is higher than the moisture content in the drying room). This is to lower the humidity inside the drying room by ventilating the air inside the drying room with outside air when the moisture is not discharged from the agricultural products due to the high humidity of the air, so drying does not proceed any further.

However, during the drying process, there are cases in which the intake/exhaust means 300 cannot be operated (when the external humidity inside the drying room is higher than the internal humidity during the first electric drying control, which will be described later, and during the second later drying control), in these cases, the refrigerant circulation By operating the device 450, the increased humidity inside the drying chamber is lowered.

That is, when the refrigerant circulation device 450 operates, the refrigerant flows through the refrigerant circulation pipe 451 installed on one side of the inside of the drying chamber 100, and is contained in the air inside the drying chamber heated on the surface of the cooled refrigerant circulation pipe 451. The absorbed moisture is adsorbed and condensed, and as a result, the moisture contained in the air inside the drying chamber is reduced and the humidity inside the drying chamber is lowered.

The temperature and humidity measuring means 500 measures the temperature and humidity inside and outside the drying chamber 100 and provides the measured temperature and humidity information to the control means 600 .

Specifically, the temperature and humidity measuring means 500, as shown in FIG. 5,

A first temperature sensor 510 that measures the temperature outside the drying chamber 100 and provides the measured temperature information to the control unit 600;

A second temperature sensor 520 that measures the temperature inside the drying chamber 100 and provides the measured temperature information to the control unit 600;

A first humidity sensor 530 that measures the humidity outside the drying chamber 100 and provides the measured humidity information to the control means 600;

It is characterized in that it includes a second humidity sensor 540 that measures the humidity inside the drying chamber 100 and provides the measured humidity information to the control unit 600 .

The first temperature sensor 510 measures the temperature outside the drying chamber 100 and provides the measured temperature information to the control unit 600, and the second temperature sensor 520 measures the temperature inside the drying chamber 100. is measured, and the measured temperature information is provided to the control means (600).

The first humidity sensor 530 measures the humidity outside the drying chamber 100 and provides the measured humidity information to the control means 600, and the second humidity sensor 540 measures the humidity inside the drying chamber 100. is measured, and the measured humidity information is provided to the control means (600).

Therefore, the control means 600 to be described below is provided by the first temperature sensor 510, the second temperature sensor 520, the first humidity sensor 530, and the second humidity sensor 540, inside and outside the drying room 100. The intake/exhaust means 300 and the hot air means 400 are controlled under various conditions according to the temperature and humidity information of , so that the environment inside the drying room becomes the optimal environment for drying the agricultural products 20 to be dried.

The control means 600 controls the intake/exhaust means 300 and the hot air means 400 so that the agricultural products 20 to be dried are in a primary drying state by using the temperature and humidity information provided by the temperature and humidity measuring means 500. After the control process, secondary drying control is performed to control the air intake and exhaust means 300 and the hot air means 400 so that the agricultural products 20 to be dried are in a final dry state using the temperature and humidity information provided by the temperature and humidity measuring means 500. is a composition

That is, the control unit 600 performs heating inside the drying chamber and intake/exhaust step by step through the intake/exhaust unit 300 and the hot air unit 400 (after the first drying control repeating the first electric drying control and the first later drying control). , Secondary drying control is performed by repeating secondary electric drying control and secondary late drying control) to adjust the temperature and humidity inside the drying room to the optimal conditions required for drying agricultural products.

Hereinafter, the primary drying control of the control means 600 will be described in detail.

The primary drying control of the control unit 600 is such that the agricultural products 20 to be dried are in a primary drying state (eg, a state in which the moisture content of the agricultural products to be dried is less than a certain value (eg, 10 to 15%)). It is a control that repeatedly performs the first electric drying control and the first late drying control.

Specifically, the primary drying control of the control means 600 allows air outside the drying chamber to be introduced into the drying chamber and at the same time to allow the air inside the drying chamber to be discharged to the outside of the drying chamber, and the internal temperature of the drying chamber 100 in an external air inflow and outflow state. When the primary electric drying control and the internal temperature of the drying chamber reach the preset first target temperature, the air outside the drying chamber does not flow into the drying chamber 100, and the air inside the drying chamber 100 1st late drying control for maintaining the internal temperature of the drying chamber 100 at a first target temperature for a certain period of time so that is not discharged to the outside of the drying chamber and outside air does not flow in and out, the first electric drying control and the first late-stage drying control are repeated until the humidity inside the drying chamber at the time of the first late-stage drying control reaches a preset first target humidity.

That is, the control means 600 repeatedly performs the first electric drying control and the first late drying control until the humidity inside the drying room at the time of the first late drying control reaches the first target humidity (eg, 30%), The agricultural products 20 are in a primary drying state (eg, a state in which the moisture content of the agricultural products to be dried is less than a certain value (eg, 10 to 15%)).

The primary electric drying control of the control unit 600 will be described in detail with reference to FIG. 6 .

The primary electric drying control allows the air outside the drying chamber to flow into the drying chamber and at the same time to allow the air inside the drying chamber to be discharged to the outside of the drying chamber, so that the internal temperature of the drying chamber 100 in a state of inflow and outflow of external air reaches a preset first target temperature. It is a control that

That is, the primary electric drying control creates a ventilation environment inside the drying room so that the inside of the drying room does not become high in humidity due to moisture discharged from the agricultural products to be dried, and at the same time, the inside of the drying room reaches the first target temperature so that the discharged from the agricultural products to be dried It is a control for creating a ventilation environment that prevents the inside of the drying room from becoming high in humidity due to moisture.

Specifically, the control means 600 determines the inside/outside humidity of the drying room based on the temperature and humidity information provided by the temperature and humidity measuring means 500 .

When the humidity outside the drying room is lower than the humidity inside the drying room by the temperature and humidity information provided by the temperature and humidity measuring unit 500, the control unit 600 controls the intake fan 310 of the intake and exhaust unit 300 as shown in FIG. The operating speed of the exhaust fan 320 is operated at a normal operating speed to create a ventilation environment in the drying room.

That is, at the first target temperature, moisture is discharged from the agricultural products to be dried to the outside, and the primary drying of the agricultural products to be dried is performed. Due to the high humidity, no more moisture is discharged from the agricultural products to be dried, so drying does not proceed. In this case, in order to change the high-humidity environment to a low-humidity environment, a ventilation environment is created in the drying chamber so that air outside the drying chamber is introduced into the drying chamber and at the same time, air inside the drying chamber is discharged to the outside of the drying chamber.

Meanwhile, when the intake fan 310 and the exhaust fan 320 operate to create a ventilation environment, when the humidity outside the drying room is higher than the humidity inside the drying room, the control unit 600 controls the intake fan 310 and the exhaust fan 310 of the intake and exhaust unit 300. The operating speed of the fan 320 is operated at a first speed lower than the normal operating speed, and the refrigerant circulation device 450 of the hot air unit 400 is operated at the same time.

As described above, it is necessary to provide a ventilation effect to the inside of the drying room so that the inside of the drying room does not become high in humidity due to moisture discharged from agricultural products. To this end, the intake fan 310 and the exhaust fan 320 are operated. If the humidity of the outside air flowing into the drying room is higher than the humidity inside the drying room, it is not desirable for drying agricultural products. That is, the ventilation effect is to prevent the inside of the drying chamber from becoming highly humid. If the incoming outside air is higher than the humidity inside the drying chamber, the ventilation effect is halved.

However, the intake fan 310 and the exhaust fan 320 must be operated for ventilation of the drying room, and the intake fan 310 and the exhaust fan 320 are operated for ventilation of the drying room, but the humidity outside the drying room is higher than the humidity inside the drying room. The operation speed of the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 is operated at a first speed lower than the normal operation speed (eg, 30% of the normal speed) to produce a minimum ventilation effect. At the same time, the refrigerant circulation device 450 of the hot air means 400 is operated.

The reason for operating the refrigerant circulation device 450 is that when the humidity inside the drying room is rather high due to the outside air (air with a higher humidity than the humidity inside the drying room) that has flowed into the inside of the drying room, the moisture contained in the air inside the drying room is adsorbed to the outside. This is to lower the humidity inside the drying room, which is increased due to the inflow of air.

On the other hand, after the intake fan 310 and the exhaust fan 320 for ventilation operate, the control means 600 uses the temperature and humidity information provided by the temperature and humidity measuring means 500 to determine the internal temperature of the drying chamber 100 in a state where external air flows in and out. is identified, and the heating temperature of the carbon fiber heating cable 420 is calculated so that the inside of the drying chamber 100 reaches the preset first target temperature for a preset time at the temperature determined, and the carbon fiber heating is performed at the calculated heating temperature. The cable 420 is controlled to generate heat.

That is, the control means 600 sets the internal temperature of the drying chamber to the first target temperature (the temperature at which the agricultural products to be dried are subjected to primary drying) while the intake fan 310 and the exhaust fan 320 are operated for a ventilation effect. To control the heating temperature of the carbon fiber heating cable 420 so as to rise to .

At this time, the temperature of the outside air introduced into the drying chamber varies depending on the weather and the season, and the temperature inside the drying chamber 100 into which the outside air is introduced also varies according to the temperature of the external air introduced.

Therefore, the control means 600 determines the internal temperature of the drying chamber 100 in a state of inflow and outflow of external air through the temperature and humidity information provided by the temperature and humidity measuring means 500, and first sets a preset temperature of the inside of the drying chamber 100 at the determined temperature. The heating temperature of the carbon fiber heating cable 420 to reach the target temperature for a predetermined time is calculated, and the carbon fiber heating cable 420 is controlled to generate heat at the calculated heating temperature.

For example, if the internal temperature of the drying chamber 100 into which the outside air is introduced is 30°C, the first preset target temperature is 45°C, and the preset time (eg, 30 minutes), the control means 600 is currently 30°C. Calculate the heating temperature (eg, 100 ° C) of the carbon fiber heating cable 420 so that the temperature inside the drying room, which is ° C, rises to 45 ° C within 30 minutes, and let the carbon fiber heating cable 420 generate heat at the calculated temperature . Then, the temperature inside the drying chamber rises from 30°C to 45°C within 30 minutes.

For another example, if the internal temperature of the drying chamber 100 into which the outside air is introduced is 20°C, the preset first target temperature is 45°C, and a preset time (eg, 30 minutes), the control means 600 Calculate the heating temperature (eg 130 ° C) of the carbon fiber heating cable 420 so that the temperature inside the drying room, which is currently 20 ° C, rises to 45 ° C within 30 minutes, and the carbon fiber heating cable 420 generates heat at the calculated temperature. let it do Then, the temperature inside the drying chamber rises from 20°C to 45°C within 30 minutes.

The primary later drying control of the control unit 600 will be described in detail with reference to FIG. 7 .

The first late drying control of the control unit 600 prevents air from outside the drying chamber from flowing into the drying chamber 100 when the internal temperature of the drying chamber reaches a preset first target temperature through the first electric drying control, and at the same time (100) Control that prevents internal air from being discharged to the outside of the drying chamber and maintains the internal temperature of the drying chamber 100 in a state in which external air does not flow in and out at a first target temperature for a predetermined period of time.

Specifically, when the internal temperature of the drying chamber reaches the preset first target temperature through the primary electric drying control, the control unit 600 operates the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 as shown in FIG. 7 . ) is stopped, and the refrigerant circulation device 450 is stopped when it is in operation, and the carbon fiber heating cable 420 is maintained at the first target temperature for a certain period of time so that the internal temperature of the drying chamber 100, in which external air does not flow in and out, is maintained at the first target temperature. ) heats up.

That is, when the control unit 600 reaches the first target temperature (eg, 45° C.) of the drying chamber 100 based on the information provided by the second temperature sensor 520 during the primary electric drying control, The fan 310 and the exhaust fan 320 are stopped so that outside air does not flow into the drying chamber. At this time, if the refrigerant circulation device 450 is in operation, it is stopped.

Subsequently, the control unit 600 controls the carbon fiber heating cable 420 to generate heat so that the interior of the drying chamber is maintained at the first target temperature (eg, 45° C.) for a predetermined period of time (eg, 30 minutes). At this time, the heating temperature of the carbon fiber heating cable 420 is lower than the heating temperature at the time of the primary electric drying control (the heating temperature that allows the inside of the drying chamber to reach the first target temperature for a preset time).

That is, the primary late-stage drying control sets the drying room in an airtight state without communication with the outside, and then maintains the inside of the drying room at the first target temperature (e.g., 45 ° C) for a certain period of time (e.g., 30 minutes) to produce a full-fledged primary agricultural product. It is a control that allows drying to occur.

Agricultural products to be dried are slightly dried (emission of moisture) even during the above-described primary electric drying control, but full-fledged drying occurs during the primary late drying control.

When agricultural products are dried in earnest through the primary late-stage drying control, full-fledged moisture is discharged from the agricultural products to be dried, and the inside of the drying chamber becomes highly humid due to the discharged moisture. When the inside of the drying room becomes high-humidity, no more moisture is discharged from the agricultural products to be dried, so drying does not proceed. will do it again

That is, the control means 600 repeatedly performs the first electric drying control and the first late drying control. During the repetition of the first electric drying control and the first late drying control, the inside of the drying room at the time of the first late drying control. When the humidity reaches the preset first target humidity (eg, 30%), the primary drying control is terminated.

The fact that the humidity inside the drying room at the time of the 1st late drying control has reached the first preset target humidity (eg 30%) means that the agricultural products to be dried are in the primary drying state (eg the moisture content of the agricultural products to be dried is a certain value (eg 10%)). ~ 15%) or less).

That is, through the primary drying control, in which the primary electric drying control and the primary later drying control are repeated, the moisture contained in the agricultural products to be dried is sufficiently discharged to a certain extent so that the agricultural products to be dried are in the primary drying state (e.g., the agricultural products to be dried). The control means 600 ends the primary drying control when the moisture content of the drying unit becomes a predetermined value (eg, 10 to 15%) or less).

Hereinafter, the secondary drying control of the control unit 600 will be described in detail.

The secondary drying control of the control means 600 is a control that allows the agricultural products 20 to be dried to be in a final dry state (eg, a state in which the moisture content of the agricultural products to be dried is less than a certain value (eg, 5%)). , It is a control that repeatedly performs the secondary electric drying control and the secondary late drying control.

Specifically, the secondary drying control of the control means 600 allows the air outside the drying room to flow into the drying room 100 when the humidity inside the drying room reaches a preset first target humidity, and at the same time, the air inside the drying room flows out of the drying room. After the secondary electric drying control and the secondary electric drying control in which the temperature inside the drying chamber reaches the preset second target temperature in the discharged state, the air outside the drying chamber is prevented from flowing into the drying chamber 100 and the air inside the drying chamber is prevented from flowing into the drying chamber 100 and a second late drying control for maintaining the temperature inside the drying room at a second target temperature for a certain period of time in a state in which is not discharged to the outside of the drying chamber. It is characterized in that the repetition is repeated until the humidity inside the drying chamber at the time of control becomes the preset second target humidity.

For example, the control unit 600 repeatedly performs the secondary electric drying control and the secondary late drying control until the humidity inside the drying room at the time of the secondary late drying control reaches the secondary target humidity (eg, 5%). The agricultural products 20 to be dried are in a final dry state (eg, a state in which the moisture content of the agricultural products to be dried is less than a certain value (eg, 5%)).

Secondary electric drying control of the control unit 600 will be described in detail with reference to FIG. 8 .

The secondary electric drying control allows the air outside the drying chamber to flow into the drying chamber and at the same time to allow the air inside the drying chamber to be discharged to the outside of the drying chamber, so that the internal temperature of the drying chamber 100, which is an external air inflow and outflow state, reaches a preset second target temperature. It is a control that

That is, the secondary electric drying control is a control for creating an environment in which the inside of the drying room is ventilated and the inside of the drying room reaches a second target temperature higher than the first target temperature so that the remaining moisture in the agricultural product to be dried is discharged to the outside.

Specifically, as shown in FIG. 8 , the control means 600 operates the operating speed of the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 at a second speed lower than the normal operating speed, so that the drying room create a ventilated environment.

Through the above-described primary drying control, agricultural products to be dried are in a primary drying state that has been dried to some extent, and through secondary drying control, in a drying chamber at a second target temperature higher than the first target temperature to be in a final drying state. finally dried within

Even during the secondary drying control, moisture is discharged from the agricultural products in the primary drying state, and a ventilation effect must be provided in the drying room so that the discharged moisture does not adversely affect the final drying. To this end, the intake fan 310 and the exhaust fan ( 320) is operated.

At this time, the humidity of the outside air introduced into the drying chamber for the ventilation effect is higher than the humidity inside the drying chamber, which is a secondary drying control state. The humidity inside the drying room in the 1st late drying control state right before going to the 2nd drying control state is the 1st target humidity state, and the 1st target humidity is quite low, so the humidity of the outside air flowing into the drying room for ventilation effect It is obviously lower humidity than

However, the intake fan 310 and the exhaust fan 320 must be operated to ventilate the drying room, and the intake fan 310 and the exhaust fan 320 must be operated to ventilate the drying room. ) is operated at a second speed lower than the normal operation speed (eg, 10% of the normal speed) so that only a minimum ventilation effect is produced.

On the other hand, after the intake fan 310 and the exhaust fan 320 operate for minimum ventilation, the control means 600 determines the temperature and humidity information provided by the temperature and humidity measuring means 500 of the drying room 100 in the external air inflow and outflow state. The internal temperature is determined, the heating temperature of the carbon fiber heating cable 420 is calculated so that the inside of the drying chamber 100 reaches the preset second target temperature for a preset time at the temperature determined, and the calculated heating temperature is carbon. The fiber heating cable 420 is controlled to generate heat.

That is, the control unit 600 controls the internal temperature of the drying room to the second target temperature (so that the agricultural products to be dried are in a final dry state) in a state where the intake fan 310 and the exhaust fan 320 are operated for a minimum ventilation effect. temperature) to control the heating temperature of the carbon fiber heating cable 420 to rise.

Therefore, the control unit 600 determines the internal temperature of the drying chamber 100 in a state of inflow and outflow of external air through the temperature and humidity information provided by the temperature and humidity measuring unit 500, and the inside of the drying chamber 100 is preset at a temperature determined in a second The heating temperature of the carbon fiber heating cable 420 to reach the target temperature for a predetermined time is calculated, and the carbon fiber heating cable 420 is controlled to generate heat at the calculated heating temperature.

For example, if the internal temperature of the drying chamber 100 into which the outside air is introduced is 30°C, the preset second target temperature is 60°C, and a preset time (eg, 30 minutes), the control means 600 is currently 30°C. Calculate the heating temperature (eg 120 ° C) of the carbon fiber heating cable 420 so that the internal temperature of the drying room, which is ° C, rises to 60 ° C within 30 minutes, and make the carbon fiber heating cable 420 generate heat at the calculated temperature . Then, the temperature inside the drying chamber rises from 30°C to 60°C within 30 minutes.

Secondary later drying control of the control unit 600 will be described in detail with reference to FIG. 9 .

The second late drying control of the control means 600 prevents air outside the drying chamber from flowing into the drying chamber 100 when the internal temperature of the drying chamber reaches a preset second target temperature, and at the same time, the air inside the drying chamber 100 is moved outside the drying chamber. It is a control for maintaining the internal temperature of the drying chamber 100 in a state in which external air does not flow in and out at the second target temperature for a certain period of time.

Specifically, when the internal temperature of the drying chamber reaches the second target temperature preset through secondary electric drying control, the control unit 600 operates the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 as shown in FIG. 9 . ) is stopped, the refrigerant circulation device 450 is operated, and the carbon fiber heating cable 420 is heated so that the internal temperature of the drying chamber 100, in which external air does not flow in and out, is maintained at the second target temperature for a predetermined time. let it

That is, when the inside of the drying chamber 100 reaches the second target temperature (eg, 60° C.) based on the information provided by the second temperature sensor 520 during the secondary electric drying control, the control means 600 controls the intake/exhaust temperature. The intake fan 310 and the exhaust fan 320 of the means 300 are stopped so that outside air does not flow into the drying chamber.

In addition, the control unit 600 operates the refrigerant circulation device 450 that is stopped. The reason for operating the refrigerant circulation device 450 is that moisture discharged from the agricultural products to be dried during final drying increases the humidity inside the drying room, and the increased humidity interferes with the final drying of the agricultural products. To prevent this, the air inside the drying room This is to lower the humidity inside the drying room so that the humidity inside the drying room, which is increased by adsorbing the moisture contained in the drying room, does not interfere with the final drying of agricultural products.

Subsequently, the control unit 600 controls the carbon fiber heating cable 420 to generate heat so that the interior of the drying chamber is maintained at the second target temperature (eg, 60° C.) for a predetermined period of time (eg, 30 minutes). At this time, the heating temperature of the carbon fiber heating cable 420 is higher than the heating temperature during the first late drying control.

That is, in the secondary late drying control, after the drying room is kept in an airtight state without communication with the outside, the inside of the drying room is maintained at the second target temperature (e.g., 60 ° C) for a certain period of time (e.g., 30 minutes) so that the final drying of agricultural products is achieved. It is the control that makes it happen.

The agricultural products to be dried are in a primary drying state in which moisture is discharged to some extent through the above-described primary drying control, and are made in a final drying state through secondary drying control.

Even through the secondary late drying control, moisture is discharged from the agricultural products to be dried, and the humidity inside the drying room increases due to the discharged moisture.

The increased humidity inside the drying chamber prevents the discharge of moisture from the agricultural products to be dried, preventing the agricultural products to be dried from becoming final dried. Therefore, it is necessary to ventilate the drying room to lower the internal humidity of the drying room, and for this purpose, the secondary electric drying control providing a ventilation effect is performed again.

That is, the control means 600 repeatedly performs the secondary electric drying control and the secondary late drying control. During the repetition of the secondary electric drying control and the secondary late drying control, the inside of the drying room at the time of the secondary late drying control. When the humidity reaches the preset second target humidity (lower than the first target humidity, eg, 5%), the secondary drying control is terminated.

The fact that the humidity inside the drying room at the time of the second late drying control has reached the preset second target humidity (eg 5%) means that the agricultural products to be dried are in the final dry state (eg, the moisture content of the agricultural products to be dried is a certain value (eg 5%)). ) or less).

In other words, through the secondary drying control, in which the secondary electric drying control and the secondary late drying control are repeated, most of the moisture contained in the agricultural products to be dried is discharged and the agricultural products to be dried are in the final drying state (e.g., the moisture content of the agricultural products to be dried). When this predetermined value (a state in which the humidity is lower than the first target humidity, eg, 5%) or less is reached, the control unit 600 ends the secondary drying control.

On the other hand, when the drying of the agricultural product 20 to be dried using the present invention 10 proceeds, the control means 600 controls the intake and exhaust means 300 and the hot air means 400 under various control conditions. ) and the hot air means 400 are controlled, the control means 600 generates various control data.

The control means 600 provides the generated various control data to the platform management server 30 so that the platform management server 30 uses them as big data necessary for generating drying management manual information.

In addition, the control means 600 uses the drying management manual information provided by the platform management server 30 to control drying of agricultural products.

Specifically, the control means 600 is used to provide temperature and humidity information inside and outside the drying chamber 100 during primary drying control, operation speed information of the intake fan 310 and exhaust fan 320, target temperature and humidity information, and secondary drying control. The temperature and humidity information of the inside and outside of the drying room 100, the operation speed information of the intake fan 310 and the exhaust fan 320, and the target temperature and humidity information are provided to the external remote platform management server 30, and the external remote platform management server ( 30), the operation speed information of the intake fan 310 and the exhaust fan 320 and the primary target temperature and humidity information required for the primary drying control according to the temperature and humidity conditions inside and outside the drying room 100 are provided by using the drying management manual information provided by the drying room 100. and performs primary drying control using the identified operation speed information of the intake fan 310 and exhaust fan 320 and the primary target temperature and humidity information, and drying management provided by the platform management server 30 at a remote location Operation speed information of the intake fan 310 and exhaust fan 320 and secondary target temperature and humidity information required for secondary drying control suitable for the current temperature and humidity conditions inside and outside the drying room 100 are grasped using the manual information, and the identified intake fan Secondary drying control is performed using operation speed information of the 310 and the exhaust fan 320 and secondary target temperature and humidity information.

The control unit 600 of the agricultural product drying system installed in each farmhouse provides control data generated when drying the agricultural products 20 to be dried to the platform management server 30 at a remote location. The control data provided to the remote platform management server 30 includes temperature and humidity information inside and outside the drying room 100 at the time of primary drying control, operation speed information of the intake fan 310 and exhaust fan 320, target temperature and humidity information, and 2 It includes temperature and humidity information of the inside and outside of the drying chamber 100 at the time of car drying control, operation speed information of the intake fan 310 and exhaust fan 320, and target temperature and humidity information.

For example, during the primary drying control, the drying chamber 100 has an internal humidity of 50% and an external humidity of 60%, an internal temperature of the drying chamber 100 of 30°C and an external temperature of 25°C, and an intake fan 310 and an exhaust fan. The operating speed of 320 is 90 RPM, which is 30% of the normal operating speed of 300 RPM, the primary target temperature is controlled to 45 ° C, and the primary target humidity is controlled to 30%, and also, when controlling the secondary drying, the inside of the drying chamber 100 The humidity is 30%, the external humidity is 40%, the drying room 100 has an internal temperature of 35 ° C and an external temperature of 25 ° C, and the operating speed of the intake fan 310 and the exhaust fan 320 is 10% of the normal operating speed of 300 RPM. If it is 30 RPM, the secondary target temperature is 60 ° C, and the secondary target humidity is controlled to 5%, the control unit 600 controls the control data (drying chamber 100 internal humidity 50%, external humidity 60%) at the time of primary drying control. , Drying chamber 100 internal temperature 30 ℃, external temperature 25 ℃, operation speed of the intake fan 310 and exhaust fan 320 90RPM, primary target temperature 45 ℃, primary target humidity 30%) and secondary drying control Time control data (drying chamber 100 internal humidity 30%, external humidity 40%, drying chamber 100 internal temperature 35 ℃, external temperature 25 ℃, operating speed of intake fan 310 and exhaust fan 320 30RPM, 2 The first target temperature of 60° C. and the second target humidity of 5%) are provided to the platform management server 30 at an external remote location.

The remote platform management server 30 uses the control data provided by the control means 600 of the agricultural product drying system installed in each farmhouse as big data, drying management manual information that allows agricultural products to be dried in an optimal drying environment. is generated, and the generated drying management manual information is provided to the control means 600 of each farm.

The control unit 600 uses the drying management manual information provided by the remote platform management server 30 to control the intake fan 310 and exhaust fan ( 320) operation speed information and primary target temperature and humidity information are identified, and primary drying control is performed using the identified operation speed information of the intake fan 310 and exhaust fan 320 and the primary target temperature and humidity information, Operating speed information of the intake fan 310 and exhaust fan 320 required for secondary drying control suitable for the current temperature and humidity conditions inside and outside the drying room 100 using drying management manual information provided by the remote platform management server 30 Secondary target temperature and humidity information is identified, and secondary drying control is performed using the identified operating speed information of the intake fan 310 and exhaust fan 320 and the secondary target temperature and humidity information.

That is, the control unit 600 of the agricultural product drying system installed in each farmhouse can dry the agricultural products 20 to be dried in an optimal drying environment using the drying management manual information provided by the platform management server 30, It is possible to obtain dried agricultural products having optimum drying quality.

Although the technical idea of the present invention has been described above with the accompanying drawings, this is an illustrative example of a preferred embodiment of the present invention, but does not limit the present invention, and the scope of the present invention is not limited to the embodiments, and this It will be obvious that those skilled in the art include modifications within the scope of the technical idea of the present invention.

In the present invention, when drying agricultural products, by repeatedly performing hot air drying and intake/exhaust for the inside of the drying room step by step, the temperature and humidity inside the drying room are adjusted to the optimal conditions required for drying agricultural products, so that the drying time of agricultural products is shortened compared to natural drying, , Industrial applicability is also high because it provides the effect of making the drying state of agricultural products to the optimal drying state (a state in which the moisture content of agricultural products is less than a certain percentage).

Claims

In the agricultural product drying system of the hot air drying method through temperature and humidity control,

a drying chamber 100 having an internal space of a certain size;

a drying tray 200 disposed inside the drying chamber 100 and loaded with agricultural products 20 to be dried;

an intake/exhaust means 300 for introducing external air into the drying chamber 100 or discharging air inside the drying chamber to the outside;

a hot air means 400 for heating and circulating air inside the drying chamber so that the agricultural products 20 loaded on the drying tray 200 are dried;

a temperature/humidity measurement means 500 for measuring temperature and humidity inside and outside the drying chamber 100 and providing the measured temperature and humidity information to the control means 600;

Temperature and humidity are measured after performing the primary drying control of controlling the air intake and exhaust unit 300 and the hot air unit 400 so that the agricultural products 20 to be dried are in a primary drying state using the temperature and humidity information provided by the temperature and humidity measuring unit 500. Control means 600 for performing secondary drying control for controlling the intake and exhaust means 300 and the hot air means 400 so that the agricultural products 20 to be dried are in a final dry state using the temperature and humidity information provided by the means 500 An agricultural product drying system of a hot air drying method through temperature and humidity control, characterized in that it comprises.
According to claim 1,

The drying tray 200,

It is a laminated structure in which a plurality of drying shelves 210 loaded with agricultural products 20 to be dried can be inserted in a layered structure,

A product drying system of a hot air drying method through temperature and humidity control, characterized in that for drying agricultural products, fixedly disposed on the inner floor of the drying chamber 100 or moved inside the drying chamber 100 by the tray moving means 220.
According to claim 2,

The tray moving means 220,

A moving rail 221 for guiding the movement of the drying tray 200;

Characterized in that it includes a moving cart 222 coupled to the drying tray 200 in a detachable manner and installed on the moving rail 221 to move the drying tray 200 on the moving rail 221 A drying system for agricultural products using hot air drying method through temperature and humidity control.
According to claim 1

The intake and exhaust means 300,

A plurality of intake fans 310 installed on the side of the drying chamber 100 to allow outside air to flow into the drying chamber 100;

A plurality of exhaust fans 320 installed on the ceiling of the drying chamber 100 to discharge the air inside the drying chamber to the outside,

The plurality of intake fans 310 operate to adjust the intake amount of external air introduced into the drying chamber 100 according to the control of the control means 600,

The plurality of exhaust fans 320 operate to adjust the exhaust amount of the internal air discharged to the outside of the drying chamber 100 according to the control of the control means 600. .
According to claim 1,

The hot air means 400,

An installation plate 410 formed in an area smaller than the ceiling area of the drying room 100 and installed at a predetermined distance from the ceiling of the drying room 100;

In order to heat the air inside the drying chamber 100, the carbon fiber heating cable 420 is installed on the installation plate 410 and the heating temperature is controlled according to the control of the control means 600,

For air circulation inside the drying chamber 100, a blowing fan 430 installed above the installation plate 410,

A plurality of hot air diverter plates 440 installed in the lower space of the installation plate 410 so that the air heated by the carbon fiber heating cable 420 is branched into the inner space of the drying chamber 100 under the installation plate 410,

A refrigerant circulation device 450 operating under the control of the control means 600 so that moisture contained in the air inside the drying chamber 100 is adsorbed,

The refrigerant circulation device 450 comprises a refrigerant circulation pipe 451 installed on one side inside the drying chamber 100.
According to claim 1,

The temperature and humidity measuring means 500,

A first temperature sensor 510 that measures the temperature outside the drying chamber 100 and provides the measured temperature information to the control unit 600;

A second temperature sensor 520 that measures the temperature inside the drying chamber 100 and provides the measured temperature information to the control unit 600;

A first humidity sensor 530 that measures the humidity outside the drying chamber 100 and provides the measured humidity information to the control means 600;

Drying system of hot air drying method through temperature and humidity control, characterized in that it includes a second humidity sensor 540 that measures the humidity inside the drying room 100 and provides the measured humidity information to the control means 600.
According to claim 1,

The primary drying control of the control means 600,

Primary electric drying control that allows air from outside the drying chamber to flow into the drying chamber and at the same time to allow air inside the drying chamber to be discharged to the outside of the drying chamber, and to ensure that the internal temperature of the drying chamber 100, which is in an external air inflow and outflow state, reaches a preset first target temperature and when the internal temperature of the drying chamber reaches a preset first target temperature, the air outside the drying chamber is prevented from flowing into the drying chamber 100, and the air inside the drying chamber 100 is not discharged to the outside of the drying chamber, and outside air does not flow in and out. Including a first late drying control for maintaining the internal temperature of the drying chamber 100 at a first target temperature for a predetermined period of time, wherein the first electric drying control and the first late drying control are the drying room at the time of the first late drying control repeated until the internal humidity becomes a preset first target humidity;

The secondary drying control of the control means 600,

When the humidity inside the drying chamber reaches the preset first target humidity, the air outside the drying chamber is introduced into the drying chamber 100 and at the same time the air inside the drying chamber is discharged to the outside of the drying chamber, and the internal temperature of the drying chamber is the preset second target temperature. After the secondary electric drying control and the secondary electric drying control to ensure that the air outside the drying chamber does not flow into the drying chamber 100 and at the same time, the air inside the drying chamber is prevented from being discharged to the outside of the drying chamber. A secondary late drying control for maintaining the temperature at a second target temperature higher than the first target temperature, wherein the secondary electric drying control and the secondary late drying control are such that the humidity inside the drying room at the time of the secondary late drying control is the first A drying system for agricultural products of the hot air drying method through temperature and humidity control, characterized in that repeated until the second target humidity lower than the target humidity.
According to claim 7,

The primary electric drying control of the control means 600,

When the humidity outside the drying room is lower than the humidity inside the drying room according to the temperature and humidity information provided by the temperature and humidity measuring unit 500, the operation speed of the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 is operated at a normal operating speed. and when the humidity outside the drying room is higher than the inside humidity of the drying room according to the temperature and humidity information provided by the temperature and humidity measuring means 500, the operating speed of the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 is set to a normal operating speed At the same time as operating at a lower first speed, the refrigerant circulation device 450 of the hot air means 400 is operated,

After the operation of the intake fan 310 and the exhaust fan 320, the temperature and humidity information provided by the temperature and humidity measurement means 500 is used to determine the internal temperature of the drying chamber 100, which is in an external air inflow and outflow state, and to determine the inside temperature of the drying chamber 100. Calculate the heating temperature of the carbon fiber heating cable 420 so that it reaches the first target temperature set in advance at the identified temperature for a predetermined time period, and control the carbon fiber heating cable 420 to generate heat at the calculated heating temperature An agricultural product drying system of hot air drying method through temperature and humidity control, characterized in that.
According to claim 7,

The first late drying control of the control means 600,

When the internal temperature of the drying chamber reaches the preset first target temperature, the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 are stopped, and the refrigerant circulation device 450 is stopped when it is in operation, and outside air flows in and out. Drying system of hot air drying method through temperature and humidity control, characterized in that the control of heating the carbon fiber heating cable 420 so that the internal temperature of the drying chamber 100, which is not in a state of being, is maintained at the first target temperature for a certain period of time.
According to claim 7,

The secondary electric drying control of the control means 600,

The operation speed of the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 is operated at a second speed lower than the normal operation speed, and after the operation of the intake fan 310 and the exhaust fan 320, the temperature and humidity are measured. Through the temperature and humidity information provided by the unit 500, the internal temperature of the drying chamber 100 in a state of inflow and outflow of external air is identified, and the internal temperature of the drying chamber 100 in a state of inflow and outflow of external air is determined in a preset second temperature inside the drying chamber. It is a control that calculates the heating temperature of the carbon fiber heating cable 420 of the hot air means 400 to reach the target temperature for a predetermined time, and causes the carbon fiber heating cable 420 to generate heat at the calculated heating temperature. Agricultural products drying system of hot air drying method through temperature and humidity control.
According to claim 7,

The second late drying control of the control means 600,

When the internal temperature of the drying chamber reaches the preset second target temperature, the intake fan 310 and the exhaust fan 320 of the intake and exhaust unit 300 are stopped, the refrigerant circulation device 450 is operated, and outside air does not flow in and out. An agricultural product drying system of a hot air drying method through temperature and humidity control, characterized in that the control of heating the carbon fiber heating cable 420 so that the internal temperature of the drying chamber 100 is maintained at the second target temperature for a certain period of time.
According to claim 1,

The control means 600,

Temperature and humidity information inside and outside the drying chamber 100 during the primary drying control, operating speed information and target temperature and humidity information of the intake fan 310 and exhaust fan 320, and temperature and humidity information inside and outside the drying chamber 100 during the secondary drying control Provides operation speed information and target temperature and humidity information of the intake fan 310 and the exhaust fan 320 to the platform management server 30 in a remote external location,

Operating speed information of the intake fan 310 and the exhaust fan 320 required for primary drying control according to the current temperature and humidity conditions inside and outside the drying room 100 using drying management manual information provided by the platform management server 30 in an external remote location and primary target temperature and humidity information, and performs primary drying control using the identified operation speed information of the intake fan 310 and exhaust fan 320 and the primary target temperature and humidity information,

Operating speed information of the intake fan 310 and the exhaust fan 320 required for secondary drying control suitable for the current temperature and humidity inside and outside the drying room 100 using drying management manual information provided by the platform management server 30 in an external remote location and secondary target temperature and humidity information, and performs secondary drying control using the identified operating speed information of the intake fan 310 and exhaust fan 320 and the secondary target temperature and humidity information. Agricultural product drying system with hot air drying method.