JP2000111234A - Grain refrigeration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain refrigeration device in which the inlet amount of the outside air directly entering an accommodation part can be reduced so as to prevent the influence of the moisture thereof so that the accommodation part can be maintained at the humidity suitable for grain. SOLUTION: In a grain refrigeration device in which a circulation part 11 is provided in the circumference of an accommodation part 4 so that cool air is circulated to cool the accommodation part, a drain recovery system 40 exhausting drain of the circulation part 11 is opened to the atmosphere in the outlet side of a radiation fan 24. By this the circulation part 11 connected to a drain recovery pipe 44 becomes a positive pressure, and the accommodation part 4 connected through communication holes 50 in the upper of the circulation part 11 also becomes a positive pressure. Accordingly, since outside air 70 does not flow in from spaces or the like in the accommodation part 4 and a weigher 7, the outside air is not dew condensed inside the accommodation part 4. Further, although the outside air flows in from the drain recovery pipe 44 depending on the outlet pressure of a fan 42, since air 70a entering the lower part of the circulation part 11 from the drain recovery pipe 44 and dehumidified by cooling in a heat absorption part 13 is fed to the accommodation part 4, dew condensation is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain refrigeration apparatus suitable for storing grains such as white rice and brown rice.

[0002]

2. Description of the Related Art In recent years, refrigeration apparatuses have become widespread in farmhouses and homes so that white rice can be stored with stable quality even in summer, when it is easily damaged. One of such refrigeration devices stores white rice in a rice bin (storage unit), and is provided with a cooling device, circulates cool air around the storage unit, and cools and stores white rice in the storage unit. There is an insulated rice bin device provided with.

FIG. 5 shows an external view of an example of a rice bin device 90, and FIG. 6 shows a schematic configuration in a longitudinal sectional view. The rice bin device 90 has a vertically long rectangular parallelepiped housing 2, and a lid 3 that can be opened and closed is installed above the housing 2. Further, inside the housing 2, a sealed storage unit 4 that can store white rice 60, and a measuring device 7 that can measure and pay out desired white rice 60 from the storage unit 4 below the storage unit 4. And a container 8 for taking out the discharged white rice 60 below the measuring device 7. The weighing device 7 and the container 8 are arranged on the front surface 2a side of the housing 2 and can be operated from outside. Therefore, the rice bin device 90
By putting white rice 60 from above and operating it from the front 2a, it is possible to easily take out a suitable amount of white rice 60 stored in the storage section 4 from below.

The rice bin device 90 includes a cooling device 20 arranged side by side with the storage section 4 and facing the rear panel 2b of the housing 2. This cooling device 20 is a simple cooling system that does not require a refrigerant and does not use a compressor or an evaporator.
It is. Further, the periphery of the storage unit 4 of the rice bin device 90 is
At a certain interval, the space is surrounded by a heat insulating material 9 made of styrene foam or the like, and a space formed by the interval forms a circulating section through which air (cool air) cooled by the Peltier cooling device 20 circulates. It is 11.

[0005] The Peltier cooling device 20 includes a heat absorbing section 13 located in the circulation section 11 and a rear panel 2 outside the circulation section 11.
b. The heat absorbing section 13 and the heat discharging section 14 are connected to a Peltier cooling unit 15 having a Peltier element. Circulation unit 1
In the vicinity of the heat absorbing portion 13 located at the position
The circulation fan 16 is installed so that the entire storage unit 4 is cooled almost uniformly by circulating the air. A radiating fan 2 for pumping the outside air 70 upward to promote heat radiation from the heat discharging unit 14 is provided below the heat discharging unit 14.
4 are provided. Further, a power supply unit 18 that supplies power to the Peltier cooling device 20, the heat dissipation fan 24, and the like is disposed below the heat dissipation fan 24.

Further, the rice bin device 90 includes a drain recovery system 80 for recovering the drain 30 generated in the heat absorbing section 13.
Is provided. The drain recovery system 80 includes a drain receiver 43 into which the drain 30 from the heat absorbing unit 13 flows inside the circulation unit 11 and a drain recovery system that penetrates the heat insulating material 9 and guides the drain 30 from the drain receiver 43 to the outside. Tube 83
And a drain pan 42 disposed on the bottom side 2c on the rear panel 2b side of the housing 2. And
The drain 30 generated in the heat absorbing section 13 is discharged to a drain collecting pipe 83.
Through the drain pan 42 and processed by natural evaporation.

In such a rice bin device 90, the cool air cooled by the Peltier cooling device 20 is gradually cooled from the entire surroundings of the storage portion 4 through the circulation portion 11, and the white rice 60 inside the storage portion 4 is cooled. Can be cooled. Therefore, the white rice 60 inside the storage section 4 is maintained at an appropriate temperature and humidity. The interior of the storage unit is not too dry, and is in a state where suitable humidity can be maintained in order to maintain the quality of the white rice 60.

[0008]

In such a rice bin device 90, the upper lid 3 is opened to replenish the white rice 60 when the amount of the white rice 60 stored in the storage section 4 becomes small. Then, a large amount of outside air enters the storage unit 4. Especially in summer, hot and humid outside air enters. Storage section 4
When the outside air that has flowed into the inside of the storage unit 4 is cooled, the inside of the storage unit 4 is easily dewed by the moisture (moisture). In order to prevent this dew condensation, in the rice bin device 90, a plurality of small communication holes 50 communicating with the circulating unit 11 are provided above the storage unit 4, and the hot and humid outside air entering the storage unit 4 is used by the white rice 60. In order to prevent drying, the cool air in the circulating section 11 is gradually exchanged through the communication holes 50 so that the inside of the storage section 4 can be maintained at a humidity suitable for preservation of the non-condensing white rice 60.

However, the pressure inside the storage section 4 may be slightly lower than the atmospheric pressure (negative pressure). That is, the drain pan 42 is disposed at the lowest position in the housing 2 and is located on the suction side of the heat radiating fan 24, and the surrounding area is at a negative pressure with respect to the atmospheric pressure due to the suction pressure of the heat radiating fan. For this reason, the circulation part 11 connected with the drain pan 42 and the drain recovery pipe 83 also has a negative pressure. The inside of the storage section 4 connected to the circulation section 11 via the communication hole 50 also has a negative pressure. When the inside of the storage unit 4 becomes a negative pressure, the outside air easily enters through a gap between the measuring device 7 below and a gap between the heat insulating materials 9 surrounding the periphery of the storage unit 4. In addition, since high-temperature and high-humidity outside air flows from the measuring device 7, particularly in summer, outside air containing moisture (moisture) flows into the storage section 4, and the white rice 60 near the measuring device 7 is not sufficiently cooled. . Also, when the inflowing outside air touches the white rice 60, the white rice 60
There is a problem that dew condensation water is generated on the surface of the white rice, and the white rice 60 has an excessive amount of moisture, so that mold is easily generated. further,
If the white rice 60 becomes excessively moist, each rice grain may stick and may not be able to be dispensed from the measuring device 7.

In order to prevent such outside air from entering,
As for the rice bin device, the measuring device 7 can be replaced with a special device having a high airtightness, or a lid can be provided on the front surface of the container 8, but the cost increases and the size of the machine increases. In addition, providing a lid on the front surface of the container 8 reduces operability. Furthermore, the rice bin device has a heat insulating material structure, but in order to have airtightness close to a closed structure,
The structure is also complicated and very expensive. Therefore, it is very expensive to prevent outside air from entering the negative pressure storage unit, and since there is a part that opens and closes for dispensing white rice 60, it is very difficult to completely seal the storage unit. difficult.

As described above, the rice bin device 90 aims to store the white rice 60 fresh for a long period of time. However, in a high-temperature and high-humidity environment, the quality of the white rice 60 partially becomes good for a long period of time. May not be maintained.

Accordingly, in the present invention, the amount of outside air flowing directly into the storage section is reduced with a simple configuration,
A grain refrigeration unit that can prevent the adverse effect of the moisture of the invading outside air and stably maintain the inside of the storage unit at a humidity suitable for the cereal without lowering the operability of the conventional rice bin device 90 at low cost. It is intended to provide.

[0013]

For this reason, in the present invention, the drain recovery system is opened to the atmosphere under a pressure condition (positive pressure) slightly higher than the atmospheric pressure at the outlet side of the radiating fan,
By making the circulation part communicating with the drain recovery system and the storage part communicating with the circulation part a positive pressure, it is possible to prevent external air from directly entering the storage part from the measuring instrument side or the like. I have.

That is, the grain refrigeration apparatus of the present invention is provided with a closed storage portion capable of storing grains, a circulating portion provided to circulate cool air around the storage portion, and installed in the circulating portion. Cooling device with a heat absorbing part and a heat exhaust part installed outside the circulating part, a heat radiating fan that pumps outside air to the heat exhaust part to radiate heat, and circulates drain generated in the circulating part from below the circulating part. A drain collection system that discharges to the outside drain collection unit, the storage unit is provided with a lid at the top so as to store grain, a payout device is provided below, and the circulation unit and the inside of the storage unit communicate with each other. Wherein the drain recovery system is open to the atmosphere on the outlet side of the radiating fan.

In the grain refrigerating apparatus of the present invention, the drain recovery system is opened to the atmosphere under the positive pressure on the blow-out side of the radiating fan, so that the circulating section has a positive pressure via the drain recovery system. . For this reason, the inside of the storage unit communicating with the circulation unit also has a positive pressure. Since this path is narrow, the pressure loss when air flows through it is high, and the air pressure inside the storage unit is almost equal to the atmospheric pressure, but the storage unit is slightly pressurized and does not become negative pressure . Therefore, the outside air does not flow into the inside of the storage unit from a dispensing device such as a measuring device located below the storage unit or from a gap between the heat insulating materials. Conversely, when the pressure inside the storage section is high, air flows out of the storage section to the outside. For this reason, it is possible to suppress the high-temperature, high-humidity outside air from directly entering the storage unit from the dispensing device side in the storage unit that has become the positive pressure. Therefore, since the grains inside the storage unit, particularly the grains near the dispensing device, are not directly exposed to the outside air including moisture, it is possible to cool down to a predetermined temperature and prevent the generation of mold. In addition, since the grain can be prevented from being hardened by moisture, the grain can be dispensed more smoothly than the measuring instrument.

Further, in the grain refrigeration apparatus of the present invention, since the drain recovery system connects the circulation part to the outside, outside air flows in through the drain recovery system. After having been cooled and dehumidified by the gas, it flows into the storage section through the communication hole. The communication hole is desirably provided above the circulation unit so as to communicate with the inside of the storage unit so that the communication hole is not blocked by grains such as white rice. In such a case, the path between the outside air flowing from below the circulation unit through the drain recovery system and entering the storage unit through the communication hole becomes longer, and enters the storage unit in a state where the air is sufficiently cooled and dehumidified. Therefore, the housing is maintained at an appropriate temperature and humidity.

As described above, the grain refrigeration apparatus of the present invention can prevent the outside air from directly entering the storage section by merely opening the drain recovery system to the atmosphere on the blowout side of the radiating fan. Therefore, it is possible to reduce the inflow of outside air directly into the storage unit without providing an expensive countermeasure such as providing a discharging device with a high degree of sealing or increasing the degree of sealing of the heat insulating structure. Therefore, it is possible to provide a low-cost grain refrigeration apparatus that can keep grains such as white rice at an appropriate humidity and store the grains with stable quality.

The drain recovery pipe can be opened to the atmosphere on the blow-out side of the radiating fan by arranging the drain recovery section of the drain recovery system located outside the circulation section on the blow-out side of the radiator fan. When the drain recovery unit is installed below the heat radiating fan, a drain recovery pipe for guiding the drain to the drain recovery unit is passed through the discharge side of the heat radiator fan, and an opening is formed in the drain recovery tube at the discharge side of the heat radiator fan. It can be realized by providing. At this time, the area of the opening is
It is desirable that it be formed larger than the cross-sectional area inside the drain recovery pipe. By increasing the area of the opening of the drain recovery pipe, pressure loss is reduced, so that it is easy to pressurize the inside of the circulation section and the storage section.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a rice bin device 1 according to the present invention using a longitudinal sectional view. The schematic configuration of the rice bin device 1 of this example is the same as that shown in FIGS. 5 and 6, and a lid 3 that can be opened and closed is installed above a vertically long rectangular parallelepiped housing 2. Has a closed storage section 4 for storing white rice 60. The storage part 4 has a tapered lower part so that the white rice 60 can be easily dispensed from below. And
A measuring device 7 for measuring and dispensing desired white rice 60 from the storage portion 4 below the storage portion 4 and a detachable container 8 for removing the dispensed white rice 60 below the measuring device 7 are stored. ing. The weighing device 7 and the container 8 are provided on the front surface 2a side of the housing 2 and can be operated from the outside. Therefore, the rice bin device 1 can put the white rice 60 from above, and can easily take out the white rice 60 stored in the storage section 4 from below.

The rice bin device 1 is also arranged in the storage section 4, and a Peltier cooling device 20 is arranged on the side of the rear panel 2 b of the housing 2 so that the storage section 4 can be cooled through the circulation section 11. . In addition, a plurality of small communication holes 50 are provided above the side wall 4a of the storage unit 4 in the rice bin device 1 of this example. Therefore, when the lid 3 is opened, it is easy to adjust the rise in humidity due to the outside air entering the storage section 4. Since these configurations are common to the rice bin device 90 described above, the following description will be given with common reference numerals.

In the rice bottle device 1 of this embodiment, a system 4 for collecting the drain 30 generated in the heat absorbing portion 13 of the cooling device 20 is also provided.
0 is provided. The drain recovery system 40 of this example also includes a drain tray (drain receiving portion) 43 that receives the drain 30 disposed below the circulation section 11 having the heat absorption section 13, and a bottom outside the circulation section 11 on the rear panel 2 b side. The drain 2 includes a drain pan 42 provided on the side 2c and serving as a drain recovery section, and a drain recovery pipe 44 for guiding the drain 30 from the drain tray 43 to the drain pan 42. The drain pan 42 of this example is adjacent to the power supply unit 18 and is evaporated by this heat. Further, the temperature of the drain pan 42 rises due to the heat radiation of the upper heat-dissipating section 14 and the dry-pan 42 is slightly dried. The rice is discharged out of the rice bin device 1 through the louver-shaped opening 25b on the upper side.

The drain pan 42 of the present embodiment is also disposed below the heat radiating fan 24 similarly to the rice bin device 90 described above, but the drain recovery pipe 44 is connected to the outlet side (outlet side) of the heat radiating fan 24. The drain recovery pipe 44 is provided with an opening 46 at a position on the outlet side of the heat radiating fan 24. That is, the drain recovery system 40 of the present example is open to the atmosphere on the outlet side of the heat dissipation fan 24. Further, the opening area of the opening 46 of this embodiment is formed to be slightly larger than the cross-sectional area inside the drain recovery pipe. For example, an opening 46 having a diameter of about 6 mm is formed in a drain pipe 44 having an inner diameter of 6 mm. In the rice bin device 1 of this example, an opening 46 is provided at the outlet side of the fan 24
Is provided, the pressure upstream of the opening 46 of the drain recovery pipe 44 is positive. Therefore, the drain collection pipe 44
The circulating section 11 connected to this also has a positive pressure. Then, the inside of the storage unit 4 also has a positive pressure through the communication hole 50 communicating with the storage unit 4 above the circulation unit 11.

As described above, when the inside of the storage section 4 is in a positive pressure state, unlike the rice bin device 90 described above, the gap between the storage section 4 and the measuring instrument 7 and the heat insulating material surrounding the storage section 4 are provided. The outside air 70 does not flow through the gap with the outside 9. In particular, by increasing the size of the hole formed in the drain recovery pipe 44 within a range that does not hinder the flow of the drain, the drain recovery pipe 4 can be efficiently used with the pressure at the outlet of the fan 24 and reduced in pressure loss.
4. The inside of the circulation section 11 and the storage section 4 can be pressurized. Therefore, it is possible to prevent the inside of the storage section 4 from becoming a negative pressure, and it is possible to increase the pressure to approximately the same as the atmospheric pressure or to a somewhat positive pressure depending on the fan outlet pressure.

For this reason, it is possible to prevent the white rice 60 inside the storage section 4, particularly the upper part of the measuring device 7 serving as the payout section, from being wet, generating mold, and preventing the white rice 60 from sticking to each other. Therefore, fresh white rice 60 can be paid out smoothly at any time.

Depending on the outlet pressure of the fan 42, in the rice bin device 1 of this embodiment, the drain recovery pipe 44 is pressurized, so that the outside air flows in.
b, enters through the lower louver-shaped opening 25a, enters through the drain recovery pipe 44 into the lower part of the circulation section 11, and enters the heat absorbing section 13
Is cooled and dehumidified. Then, the air (cool air) 70a that has been cooled and dehumidified becomes the communication hole 50 in the upper portion of the
Through the storage unit 4. Therefore,
In the rice bin device 1 of this example, although the outside air enters the storage unit 4, in the rice bin device 90 described above, the high-temperature and high-humidity outside air directly enters from the measuring device 7 below the storage unit 4. On the other hand, only low temperature and low humidity air flows in.
Therefore, the inside of the storage unit 4 is maintained under conditions suitable for refrigeration of the white rice 60 without adversely affecting the white rice 60 in the storage unit 4. Conversely, the fresh air that became cold,
By circulating inside the storage section 4, conditions suitable for maintaining the freshness of the white rice 60 are provided. As described above, in the rice bin device 1 of the present embodiment, the white rice 60 inside the storage unit 4 can be stably stored in a fresh state for a long time, as compared with the conventional rice bin device 90.

FIG. 2 shows how the weight of the whole rice bin device 1 increases when the rice bin device 1 of the present embodiment is continuously operated (solid line 62), and how the weight of the rice bin device 90 shown above increases. (Dashed line 64) is shown in comparison. As can be seen from the figure, the rice bin device 1 of the present example has a weight increase of about １ ／ of the entire device when continuously operated compared to the conventional rice bin device 90. It is considered that the cause of the weight increase during the continuous operation is that the moisture of the outside air is collected as a drain, or is absorbed or adsorbed by the white rice 60 inside the storage section 4 before being formed as the drain. Therefore, it can be seen that the rice bottle device 1 of the present example has the effect of moisture reduced to about half in weight as compared with the conventional rice bottle device 90. Actually, when the amount of outside air flowing into the rice bottle device 1 of this embodiment and the rice bottle device 90 described above is measured, the conventional rice bottle device 90 is 154 L / hr, whereas the rice bottle device 1 of this embodiment is 96 L / hr. hr and about half. Such a difference in the flow rate is that in the rice bin device 1 of this example, the pressure in the area on the suction side of the heat dissipation fan 24 is -0.35 mmAq, and the pressure in the area on the discharge side is about +0.2 mmAq. It seems that this is also caused. In any case, in the rice bin device 1 of the present example, when the outside air flows into the storage unit 4, the temperature and the humidity are appropriately treated as the cool air 70a. Maintain conditions suitable for storage.

FIG. 3 shows a different example of the drain recovery system of the present invention. Further, FIG. 4 schematically shows a schematic configuration of the drain recovery system 40a of the present example, as viewed from the rear, on an enlarged scale. In the drain recovery system 40a of this embodiment, a drain pan 42a serving as a drain recovery unit for recovering the drain 30 is disposed between the heat exhaust unit (heat sink) 14 and the blowout side of the heat radiation fan 24. That is, the drain pan 42a is placed under positive pressure at the outlet of the fan 24, where the drain recovery system 40a is open to the atmosphere. Therefore, this drain recovery system 40a
Thereby, the circulation section 11 and the storage section 4 are maintained at the atmospheric pressure or at a positive pressure. Therefore, similarly to the rice bin device 1 shown in FIG. 1, outside air can be prevented from directly entering the storage unit 4 from the measuring instrument 7 or the like, and the entire storage unit 4 is maintained in an environment suitable for storing the white rice 60. be able to.

As described above, the rice bin device 1 of the present embodiment
In this case, by merely opening the drain recovery system 40 (40a) to the atmosphere on the outlet side of the heat dissipation fan 24, it is possible to prevent the outside air from directly flowing into the storage unit 4. Therefore, the measuring device 7
The inside of the storage unit 4 can be stably maintained at a humidity suitable for the white rice 60 without increasing the airtightness of the storage unit 4 or employing a heat insulating structure with a higher airtightness. Therefore, the rice bin device 1 that can store fresh white rice for a long period of time can be provided at low cost even though it has a heat insulating structure.

In the present embodiment, the grain refrigeration apparatus to which the present invention is applied to the rice bin apparatus 1 has been described as an example. However, not only the white rice 60 but also other refrigeration apparatuses that refrigerate and store other grains such as wheat and brown rice. Needless to say, the present invention can be applied.
In addition, in this example, the rice bin device using the Peltier cooling device 20 has been described, but a cooling device using a refrigerant, a compressor, an evaporator, and the like may be used. However, a compact Peltier cooling device having a simple structure is suitable for a small grain refrigeration device such as a rice bin device.

[0030]

As described above, in the grain refrigerating apparatus of the present invention, the drain recovery system is opened to the atmosphere on the blowout side of the radiating fan and is pressurized. Therefore, the circulation portion connected by the drain recovery system and the storage portion connected by the connection hole have a positive pressure. Therefore, the outside air is prevented from flowing into the inside of the storage unit from a dispensing device such as a measuring device located below the storage unit or a gap between the heat insulating materials. Therefore, the high-temperature and high-humidity outside air does not directly enter the storage section from the dispensing device side. Therefore, the grains inside the storage section, especially the grains near the dispensing device, are not exposed to the outside air including the invading moisture, so that only this portion does not cool down sufficiently, or there is a problem that mold is generated due to condensation. Can be prevented. In addition, since it is possible to prevent the grains from hardening due to the moisture of the invading outside air, the grains can be smoothly discharged from the measuring instrument.

In the grain refrigerating apparatus of the present invention as well, outside air may enter the storage section from the drain recovery system via the circulation section. However, since this outside air is the outside air after cooling and dehumidification through the circulation section, The inside of the unit can be maintained at an appropriate temperature and humidity.

As described above, the grain refrigeration apparatus of the present invention is capable of directly opening the outside air directly into the storage unit without providing an expensive air-tight dispensing device or taking expensive measures such as increasing the air-tightness of the heat insulating structure. Can be reduced. Therefore, it is possible to provide a low-cost grain refrigeration apparatus that can keep grains such as white rice at an appropriate humidity and store the grains with stable quality.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of a rice bin device according to the present invention.

FIG. 2 is a graph showing how the weight of the whole rice bin device increases when the rice bin device shown in FIG. 1 is continuously operated, in comparison with the conventional rice bin device where the weight increases.

FIG. 3 is a longitudinal sectional view showing a schematic configuration of a different example of the drain recovery system of the present invention.

FIG. 4 is an enlarged view of the drain recovery system shown in FIG.

FIG. 5 is a perspective view showing the appearance of a conventional rice bin device.

6 is a vertical sectional view showing a schematic configuration of the rice bin device shown in FIG.

[Explanation of symbols]

 1, 90 · · · rice bin device 2 · · · housing 2a · · · front panel 2b · · · · rear panel 2c · · · bottom surface 3 · · · lid 4 · · · storage unit 7 · · measuring instrument 8 · · · take-out container 9 · · thermal insulation 11 ··· Circulating unit 13 ··· Heat absorbing unit 14 ··· Heat exhausting unit 15 ··· Peltier cooling unit 16 ··· Circulating fan 18 ··· Power supply unit 20 ··· Peltier cooling device 24 ··· Heat dissipation fan 25 ··· Louver-shaped opening 30 Drain 40, 80 Drain recovery system 42 Drain pan 43 Drain tray 44, 83 Drain recovery pipe 45 Drain pipe 46 Opening 48 Water absorbing material 50 Communication hole 60・ ・ White rice 70 ・ ・ Outside air 70a ・ ・ Cold air

Continuing from the front page (72) Inventor Akihiro Koyama 1000 Toyoshina, Toyoshina-cho, Minamiazumi-gun, Nagano Prefecture Inside GAC Co., Ltd. 3L045 AA04 AA07 BA01 CA02 DA04 EA01 KA01 PA01 PA04 3L048 AA01 AA07 BA01 CA01 CB02 CB05 CB07 DA03 DB03 FA05 GA01 GA02

Claims (4)

[Claims] 1. A closed storage part capable of storing grains, a circulation part provided to circulate cool air around the storage part, a heat absorbing part installed in the circulation part and an outside of the circulation part. A cooling device having an installed heat-dissipating section; a heat-dissipating fan for pumping outside air to the heat-dissipating section to radiate heat; and a drain outside the circulating section from below the circulating section for drain generated in the circulating section. A drain collection system that discharges to a collection unit, wherein the storage unit is a grain refrigeration device that is provided with a lid at the top so as to store the grain, a payout device is provided below, and communicates with the circulation unit. The grain refrigeration apparatus, wherein the drain recovery system is open to the atmosphere on the blow-out side of the radiating fan. 2. The grain refrigerating apparatus according to claim 1, wherein the drain collecting section is arranged on a blow-out side of the heat radiating fan. 3. The drain recovery pipe according to claim 1, wherein a drain recovery pipe for guiding the drain to the drain recovery section passes through a blowout side of the heat dissipation fan, and an opening is provided on the drain recovery pipe blowout side of the heat dissipation fan. A grain refrigeration apparatus, comprising: 4. The method according to claim 3, wherein the area of the opening is:
A grain refrigerating device characterized by having a cross-sectional area larger than a drain collection pipe.