KR20120139218A - Low temperature container - Google Patents

Abstract

PURPOSE: Low temperature storage is provided to keep grains with the proper amount of moisture, and minimize dew condensation. CONSTITUTION: Low temperature storage comprises an air conditioning system, a ventilation system, a humidity control system, a sensor system, and an insulation and natural ventilation system. The air conditioning system comprises a duct(13) and a discharge port(14). The ventilation system comprises a ventilation unit(17). The humidity control system comprises red clay set on the inner wall of the storage, a red clay structure, and a paulowniawood structure. The sensor system comprises a temperature sensor(15), a humidity sensor(16), and a control system. The insulation and natural ventilation system comprises an air suction port(20) on the outer wall of the storage to discharge hot air in the storage to the outside.

Description

Cold storage container {Low temperature container}

The present invention relates to a low-temperature warehouse, and more particularly, by using a cooling and heating unit and an air flow and humidity control device in a warehouse to minimize condensation and deterioration of the storage surface and to minimize the occurrence of condensation on the warehouse wall and floor. Regardless of the region, it relates to low-temperature warehouses that can safely, cheaply and freshly store stocks such as agricultural products, aquatic products, livestock products, and processed foods.

The conventional low temperature warehouse (1) is installed indoor unit (3) for cold air supply in the warehouse (2) made of panels, bricks, etc. as shown in Figure 1 and installed the outdoor unit (4) outside the warehouse to increase the temperature inside the warehouse I'm using a way to keep it constant. The indoor unit 3 is generally composed of an evaporator and a blowing fan. The evaporator is made of a refrigerant pipe and a heat sink, and the refrigerant inside the refrigerant pipe is forcedly circulated by the outdoor unit. Cool air is generated by sending wind to the refrigerant pipe at low temperature and low pressure. The warehouse 1 is sealed in its entirety, and cold air produced by the indoor unit 3 is convection in the sealed space inside the warehouse. In this case, the moisture contained in the air in the warehouse is continuously reduced by the indoor unit 3, and thus the moisture of the stock stored in the warehouse is also continuously reduced. This is the same principle as fruit is evaporated and crumpled when fruit is left in the refrigerator for a long time. In addition, since the warehouse 1 is sealed, the hot air does not escape to the outside and is continuously collected near the ceiling inside the warehouse 1. That is, the conventional low temperature warehouse simply has a function of controlling the temperature, continuously reduces the humidity, and does not take into account the flow of hot and cold air, so that the inside of the warehouse is kept in a low temperature dry state. Therefore, the moisture content of the stored water is lower than the reference value, and as a result, the stored water becomes cold-dried. Therefore, when the warehouse door is opened when the storage is taken out, the outside air flows into the warehouse, and the stored water and the cold dried water Due to the difference in temperature and humidity from the air, there is a disadvantage that condensation occurs on the surface of the storage stored in the warehouse. In particular, when the warehouse door is opened for a while in summer, condensation occurs very much on the surface of the storage stored inside the warehouse, and as a result, microorganisms are multiplied by the condensation, which results in rapid deterioration of the storage. This causes the development of fungi and fungi. If condensation forms on the surface of the deposit, additional costs and time are required to rebuild the deposit. In addition, if the storage stored inside the warehouse is deteriorated, it must be disposed of, so the economic loss is large. In addition, there is a problem that condensation occurs on the walls and the floor of the warehouse due to the temperature and humidity difference between the floor and the warehouse in summer due to the low temperature drying state inside the warehouse.

20-0266901, 2002. 02. 22.

The present invention minimizes condensation and deterioration of the storage surface stored in the warehouse at low cost by using a cooling and heating system and an airflow and humidity control device in the warehouse, and also minimizes the condensation of the warehouse building. The purpose is to provide a low-temperature warehouse that can be stored fresh for a long time stored inside.

The present invention relates to a low-temperature warehouse that can keep the storage fresh inside the warehouse for a long time by minimizing condensation and deterioration of the surface of the storage being stored in the warehouse at a low cost, and also minimizing the condensation of the warehouse building. Heating and cooling system to keep constant; Ventilation system for discharging the hot air accumulated in the upper part of the warehouse to the outside and supplying fresh air from the outside to the room and circulating the indoor air; Humidity maintenance system consisting of ocher brick and paulownia to maintain the humidity inside the warehouse; And a sensor system for sensing temperature and humidity. In particular, the ventilation system and the humidity maintenance system facilitate the air flow inside the warehouse and control the humidity so that hot air and latent heat does not accumulate inside the warehouse even during temporary warehouse openings, so that condensation is stored in the warehouse and inside the warehouse. It keeps the storage stored inside the warehouse fresh for a long time.

The present invention minimizes the condensation on the surface of the storage and the deterioration of the storage when the storage of agricultural products, aquatic products, livestock products, processed foods, etc. stored in the warehouse for a long time at low temperature, and also minimizes the occurrence of condensation on the walls and floors of the warehouse building, storage It is a low-temperature warehouse that keeps and keeps the condition of the storage stored in the warehouse for a long time by adding proper moisture to water. The low temperature warehouse of the present invention can be efficiently used for storage of agricultural products, aquatic products, livestock products, processed foods and the like. In particular, the low temperature warehouse of the present invention lowers the temperature at the time of storage of rice and seeds to stop the growth of rice, maintain the taste by containing appropriate moisture, and consequently has the advantage of long-term storage and increase germination rate of rice and seeds have.

1
1 is a cross-sectional view of a conventional low temperature warehouse.
2 is a cross-sectional view of the cold warehouse according to the present invention.
Figure 3 is a cross-sectional view and a side view of the warehouse heating and cooling system connection of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the present invention provides a cooling and heating system for maintaining a constant room temperature of a warehouse 5; Ventilation system for discharging the hot air accumulated in the upper part of the warehouse to the outside and supplying fresh air from the outside to the room and circulating the indoor air; Humidity control system consisting of ocher brick and paulownia to maintain the humidity inside the warehouse; Sensor system for sensing temperature and humidity; It consists of natural insulation system by double wall of warehouse.

The warehouse 5 is composed of an outer wall 6, an outer wall ceiling 7, an inner wall 8, an inner wall ceiling 9, an entrance door 10, and a space 11 between the outer wall and the inner wall.

The cooling / heating system is composed of a cold / hot air fan (12), a duct (13), and a discharge port (14) for generating cold and warm air. The cold / hot air fan 12 is installed outside the warehouse 5 and is automatically operated by the temperature sensor 15 installed inside the warehouse 5. That is, when the temperature inside the warehouse falls below the reference temperature according to the storage temperature characteristics stored in the warehouse during the winter, the hot air fan is activated, and the temperature inside the warehouse depends on the storage temperature characteristics stored in the warehouse during the summer. If the temperature rises above the reference temperature, the cooler is activated. For example, for rice, the storage reference temperature is 14 degrees Celsius. The cold and hot air generated by the cold and hot air fan 12 is moved through the duct 13 installed in the warehouse outer wall 6 and discharged into the warehouse through the discharge ports 14 installed in various places of the warehouse inner wall 8. The discharge port 14 has a built-in filter to prevent the inside of the warehouse of microorganisms mixed in the air flowing from the outside. Therefore, fresh and healthy outside air is supplied through the discharge port inside the warehouse. This serves to prevent the microbial propagation of the stock stored in the warehouse and to maintain the initial storage state. Duct 13 is wrapped with insulation to minimize heat dissipation. The duct 13 can be installed in the warehouse inner wall 8 or the outer wall 6. When the duct 13 is installed on the outer wall 6, it can be maintained from the outside without opening the warehouse door, which is convenient and easy to use. We do not want to open the doors whenever possible because we want to keep the storage of the storage in the warehouse at an initial state and to avoid additional economic costs to compensate for the temperature. Such a cooling and heating system is different from the conventional cooling and heating system in which the indoor unit 3 is arranged inside a warehouse. When the indoor unit (3) is placed indoors, the warehouse door must be opened for work in case of breakdown. This is a direct cause of condensation on the surface of the reservoir. However, if you use indoor air, you can use commercially available medium or fixed pressure ducts.

The ventilation system installs a ventilation unit 17 on the ceiling of the warehouse 5 and the upper part of the inner wall 8. The reason why the ventilation unit 17 is installed in the upper part of the warehouse is that the hot air goes up and the cold air goes down. That is, the ventilation unit 17 discharges the hot air accumulated in the upper part of the warehouse to the outside, supplies fresh air from the outside, supplies the indoors, and circulates the indoor air, and the temperature sensor 15 located in the upper part of the warehouse. Is automatically operated when the reference temperature is over. The ventilation unit 17 mainly operates when the warehouse door is opened, when the temperature of the upper part is abnormally increased or when the humidity rises above the reference value.

The humidity control system is composed of ocher brick structure 18 and paulownia structure 19. The ocher brick structure 18 is a structure in which several layers of ocher bricks of a predetermined size are stacked and manufactured using ocher, charcoal, salt, etc., and serve to make the interior of the warehouse similar to the natural state. The reason for using ocher is for natural ventilation, humidity control and insulation effect. The reason for the charcoal is because it has excellent water adsorption function, and the reason for the salt is to block the movement of microorganisms through the ocher brick structure 18. The ocher brick structure 18 is installed below the warehouse inner wall 8. Although the conventional low temperature warehouse is completely enclosed, the low temperature warehouse of the present invention is made into a living and breathing space using the ocher brick structure 18. The ocher brick structure 18 has a function of controlling the humidity inside the warehouse. In addition, the ocher brick structure 18 because the fine pores are well developed, the air circulation between the inside and outside through the pores continues to be fine. The ocher brick structure 18 is wrapped in a wire mesh to prevent damage by rodents and animals. Paulownia structure (19) has a function of controlling the humidity inside the warehouse by stacking several pieces of paulownia wood. The reason for using paulownia is that paulownia is lighter than other trees and has no cracks or twists due to its straight wood texture. It is resistant to insects, corrosion, and fire, and has an excellent bubble-absorption function. Paulownia wood (19) is installed on the middle and upper floors of the warehouse (5).

The sensor system consists of a temperature sensor 15, a humidity sensor 16, and a control system. The temperature sensor 15 and the humidity sensor 16 are provided in the lower part, the middle part, the upper part, etc. of the inner wall 8 of the warehouse 5. The control system functions to maintain the temperature and humidity inside the warehouse within the set value, one control system is built in the cold and hot air fan 12, the other is installed in the manager office computer. They can be remotely controlled by connecting to the Internet, RS232, etc.

The insulation and natural ventilation system by the double wall of the warehouse utilizes the air layer of the space 11 between the outer wall and the inner wall of the warehouse 5 to prevent direct air contact between the outside and the inside of the warehouse and at the same time to the space 11 between the outer wall and the inner wall. It takes advantage of the fact that the air staying becomes an insulating layer. Here, too, we use natural convection, where hot air goes up and cold air goes down. That is, by installing an air inlet 20 under the warehouse outer wall 6 and installing the ventilation port 21 in the ceiling of the warehouse outer wall 7, hot air discharged by the ventilation unit 17 installed in the warehouse inner wall 8 is removed. Discharge to the outside of the warehouse to lower the temperature of the space 11 between the outer wall and the inner wall to have the effect of indirectly lowering the temperature inside the warehouse. This serves to supply fresh air to the ocher brick structure 18 installed on the inner wall of the warehouse. As a result, the insulation and natural ventilation system by the double wall of the warehouse can reduce the operating cost when operating low temperature warehouse.

Figure 3 shows a cross-sectional view of the cooling and heating system, such as the cooling and heating fan 12, the duct 13, the discharge port 14 installed in the warehouse and the warehouse side perspective view.

Cold storage of the present invention is characterized in that the maintenance can be performed outside the warehouse without opening the warehouse door.

The following example relates to a cold storage for rice storage.

The biggest problem when storing rice is that condensation occurs in the rice or the rice is dried and broken. If condensation forms on the rice, it must be dried again using drying equipment. In other words, economic costs and time requirements are additionally generated. This occurs when rice is stored in existing low temperature warehouses by artificially generating cold wind with a cold winder, thereby making the interior of the warehouse low temperature dry, thereby reducing the water content of the rice below the reference value. The condensation of rice is that when the warehouse is opened in a low temperature dry state, hot and humid air is introduced from the outside and hot air accumulates on the upper side, which causes condensation on the rice being stored in contact with the low temperature dry state. This problem is particularly acute with rice in the upper part of the warehouse. The rice in the lower part of the warehouse is, on the contrary, overdried by cold air, causing cracking during milling. Suitable storage temperatures for rice storage are 10-15 degrees Celsius and humidity is 65-80%. In order to make up for this drawback, the floor area of the low temperature warehouse installed by applying the invention technology is 1560m ² and the height is 6m. The low temperature warehouse has a double wall structure and the outer and inner walls are made of panels. The wall thickness is 90mm and 70mm, and the space between the outer and inner walls is 70cm. The reason for the double wall is to consider the insulation effect by air. Fourteen hot and cold air outlets with a diameter of 20 cm are installed on the inner wall of the warehouse, and six hot air ventilation units are installed on the ceiling and the upper wall of the warehouse, respectively.The width of the warehouse is 1m wide, 1m long and 20cm wide. Eight brick structures for humidity control and cold / hot air adsorption with charcoal in ocher are installed, and 32 paulownia wood structures for humidity control with 50cm width, 50cm length and 10cm thickness are installed in the middle of warehouse's inner wall. Eight and humidity sensors were installed on each of the warehouse walls. The cold and hot air blowers used were two heat pump systems with 10kW output and a four-way valve. The reason for using the two units is reserved. The ceiling of the warehouse's exterior is equipped with four air ventilation units with a diameter of 50 cm. Eight air intakes 30cm wide and 40cm high are installed under the warehouse's outer wall. The store is rice. The cold storage area is located in the mid-Northern plain of Korea. The test period was 12 months from October to September, and the test time was automatically recorded on the computer for temperature and humidity 24 hours a day. The set temperature of the installed low temperature warehouse was set at an average of 14 degrees Celsius. The rice is stored 1m wide, 1m long and 400m high. The temperature inside the warehouse was maintained at 14 ± 1 degrees Celsius and the humidity was 70-80% during the 12 months of testing. As a result of the monthly test, the water content of rice was about 15 ± 2%, and condensation and drying of rice did not occur in rice stored in the upper and lower warehouses.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

1: warehouse 2: inside the warehouse
3: indoor unit 4: outdoor unit
5: warehouse 6: outer wall
7: ceiling of the outer wall 8: inner wall
9: ceiling inside wall 10: door
11: space between outer wall and inner wall 12: cold / hot air fan
13 duct 14 discharge port
15: temperature sensor 16: humidity sensor
17 ventilation unit 18 loess brick structure
19: Paulownia structure 20: Air intake
21: vent

Claims (1)

The present invention relates to a low-temperature warehouse that can store fresh stock for a long time by minimizing condensation on the surface of the stock and deterioration of the stock and also minimizing condensation on the walls and floors of the warehouse building.
Cooling and heating system to keep the room temperature constant;
Ventilation system for discharging the hot air accumulated in the upper part of the warehouse to the outside and supplying fresh air from the outside to the room and circulating the indoor air;
Humidity control system consisting of ocher brick and paulownia to maintain the humidity inside the warehouse;
Sensor system for sensing temperature and humidity;
Insulation by warehouse double wall and natural ventilation system,
The warehouse is
Including the outer wall, outer wall ceiling, inner wall, inner wall ceiling, door, space between outer wall and inner wall,
The cooling and heating system
It includes cold and hot air generating cold and hot air installed outside the warehouse, ducts for transferring cold and hot air, and discharge ports for supplying cold and hot air transferred to the inside of the warehouse.
The ventilation system
It includes the ceiling of the warehouse inner wall and the ventilation unit installed on the upper part of the inner wall.
The humidity control system
It includes ocher brick structure manufactured using ocher, charcoal, salt, etc. installed under the warehouse inner wall and paulownia structure wood installed on the inner and upper walls of the warehouse.
The sensor system
It includes a temperature sensor and humidity sensor installed on the inside wall of the warehouse to measure the temperature and humidity of the warehouse, and a control system installed in the cold / hot air fan and the management room to measure and control the temperature and humidity of the warehouse.
The insulation and natural ventilation system
Cold storage, characterized in that the air inlet is installed in the lower part of the outer wall of the warehouse in order to indirect insulation effect and hot air generated inside the warehouse outside the warehouse, and the ventilation opening is installed on the ceiling of the outer wall of the warehouse.

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