JP2002323282A - Cold insulation storage box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide, at a low cost, a cold insulation storage box having a simple structure, which enables removal of ethylene and ensures humidification in the storage box, when cooling and storing agricultural produce or the like. SOLUTION: The cold insulation storage box 1 cools an interior 3 of the storage box for accommodating agricultural produce, by an evaporator 9 which consists a part of a refrigerating circuit 7. The storage box is provided with a ventilating and heat exchanging unit 6, consisting of an intake path 23 for directing outside air into the interior 3, an outlet path 24, which is disposed adjacent to the intake path 23, for discharging outside the air in the interior 3, and a partition wall 22 for defining the intake path 23 and the outlet path 24, so as to be heat exchangeable with each other; a blower 29 for blowing through her intake path 23 or the outlet path 24 of the unit 6; and a humidification unit 50 for evaporating supplied water and humidifying the interior 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated refrigerator suitable for low-temperature preservation of, for example, flowers, fruits, vegetables, and grains.
More specifically, the present invention relates to a cool box having an ethylene removing function and a humidifying function.

[0002]

2. Description of the Related Art Heretofore, there has been known an insulated box in which the inside of a box containing agricultural products is cooled by an evaporator of a refrigerant circuit. In such a cool box, since the inside of the cooler is dried by decreasing the humidity due to the cooling operation of the evaporator, means for humidifying the inside of the cooler is required for storing agricultural products. In addition, a means for removing ethylene gas, which is supposed to be generated from agricultural products during storage and cause deterioration of freshness and decay, is required.

Therefore, the present inventors have introduced a ventilating heat exchange unit for introducing outside air from an air intake path, discharging air inside the chamber from an exhaust path and ventilating the air, and exchanging heat between the outside air and the air inside the chamber at this time. developed. A patent for a cool box incorporating this ventilation heat exchange unit (Japanese Patent Application No. 2000-36).
No. 2465). In the cold storage, even if ethylene gas is generated from the agricultural products in the refrigerator, the ventilation is reduced only by driving the blower of the ventilation heat exchange unit to lower the ethylene concentration in the refrigerator. It has become. In addition, since outside air contains a large amount of moisture as compared with the inside air, it was intended to increase the inside humidity by introducing outside air.

[0004]

However, in the conventional cool box, most of the moisture contained in the outside air is
At the time of heat exchange with the air in the refrigerator, the water is condensed in the air intake path to form water droplets, so that the humidification capacity in the refrigerator is reduced, and the humidity in the refrigerator cannot be sufficiently adjusted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. In cooling and preserving agricultural products and the like, it is possible to remove ethylene at a low cost with a simple structure and to surely humidify the inside of a refrigerator. The purpose is to provide a cool box.

[0006]

In order to achieve the above-mentioned object, a refrigerator according to the present invention has a refrigerator for cooling the interior of a refrigerator for storing agricultural products by an evaporator constituting a part of a refrigerant circuit. In the refrigerator, an air intake passage for introducing outside air into the refrigerator, an exhaust passage disposed adjacent to the air intake passage for discharging air inside the refrigerator to the outside of the refrigerator, and a partition for exchanging heat between the air intake passage and the exhaust passage. A ventilation heat exchange unit consisting of a partition wall, a blower that blows air into or out of the ventilation heat exchange unit, and a humidification unit that humidifies the interior by evaporating supplied water. The configuration is as follows.

[0007] In the above configuration, a first water supply pipe for supplying drain water condensed in an air passage of the ventilation heat exchange unit to the humidification unit is provided.

[0008] In each of the above-mentioned configurations, the second water for supplying the drain water condensed on the surface of the evaporator to the humidifying unit.
It has a water supply pipeline.

Further, in each of the above-described configurations, in the air intake path or the exhaust path in which the blower of the ventilation heat exchange unit is provided, a merged air path that joins the air path or a branch air path that branches from the exhaust path. And a humidifying unit is provided in either the merging air passage or the branch air passage to humidify the air sent from the blower and blow it out into the storage.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view showing a cool box according to an embodiment of the present invention, and FIG. 2 is a side sectional configuration view of the cool box. In each of the drawings, a cool box 1 according to this embodiment includes a box-shaped box body 2 having an open front surface, and a front opening of the box body 2 is sealed by opening and closing doors 4 and 4 so as to be freely opened and closed. In the storage 3 of the storage main body 2, agricultural products such as flowers, fruits, vegetables, and grains are stored.

A cooling unit 5 for cooling the inside 3 of the refrigerator main body 2 is provided at one end of the upper surface of the refrigerator main body 2. Inside the box-shaped case 8 of the cooling unit 5, an evaporator 9 for exchanging heat with the cold heat of the gas refrigerant to cool the inside air and an inside fan 12 for sending the inside air to the evaporator 9 are provided. I have. The interior of the case 8 is partitioned by an evaporator 9 into an inlet space 10 and an outlet space 11 for air. On the upper surface of the storage body 2 is an entrance space 1
A suction port 37 leading to zero is formed. Outgoing space 1
The cooling air from 1 is blown into the inside 3 of the refrigerator from the outlet 14 of the air guide hood 13 attached to the top surface in the refrigerator main body 2. The evaporator 9 is located below the evaporator 9.
A drain pan 38 for receiving the drain water condensed on the surface of the drain is disposed.

The evaporator 9, together with the refrigerant compressor 15, the condenser 16, and the pressure reducing valve 18, are annularly connected by a refrigerant pipe 19 to form a general-purpose refrigerant circuit 7. The condenser 16 exchanges heat between the outside air sent from the blower 17 and the refrigerant. In this refrigerant circuit 7, when a detection signal from a temperature sensor (not shown) for detecting the internal temperature is input to the internal temperature control device (not shown), the internal temperature control device performs the refrigerant based on the detected temperature. Compressor 15,
The inside fan 12, the blower 17, or the pressure reducing valve 18 is driven to control the inside temperature so as to approach a target temperature suitable for storing agricultural products.

A ventilation heat exchange unit 6 for introducing outside air into the interior 3 and discharging air therein is provided on the other end side of the upper surface of the interior 2 of the interior. This ventilation heat exchange unit 6
As shown in FIG. 3, the front plate 21, the back plate 30, the side plate 31 b covering the body of the back plate 30 and both sides of the front plate 21, and the upper portion of the back plate 30 and both sides of the front plate 21 are covered A casing is formed from the side plate 31a. A plurality of air passages 23 and 2 for introducing outside air into the chamber 3 are provided in the casing.
, And a plurality of exhaust passages 24, 24, ..., which are arranged adjacent to the respective air intake passages 23 and discharge air inside the warehouse to the outside of the warehouse, are formed alternately. These intake path 23 and exhaust path 24
Are partitioned by a partition wall 22 capable of exchanging heat between the outside air and the inside air. The partition wall 22 is made of a water-tight material that does not allow moisture to pass, such as a synthetic resin, and prevents the permeation of water between the air intake passage 23 and the exhaust passage 24.

Further, a blower 29 is provided in a space near the outside air inlet 25 where a plurality of air inlets 23, 23,... The lower ends of the air inlets 23, 23,.
・ It has become. The upper and lower ends of the exhaust passages 24, 24, ... are sponge members 36, 36, ..., 3 respectively.
6, 36,... Are sealed. Thus, the space between the lower sponge members 36, 36,... And the lower end of the side plate 31b becomes the inside air outlet 27. In addition, a space between the upper end of the side plate 31b and the lower end of the side plate 31a is an outlet 28 that blows out the air in the refrigerator to the outside of the refrigerator.

The air inlet 23, the air outlet 24, and the partition 22 can be easily formed by stacking and bonding a plurality of cardboard plastics (for example, made of polypropylene) having two flat plates fixed to both sides of a corrugated plate. Can be formed.
The lower ends of the back plate 30, the side plate 31b, and the front plate 21
The receiving portion 32 is formed to extend below the position of the sponge material 36. A connection port 34 is provided to penetrate the bottom surface of the tray portion 32. The receiving opening 32 is formed in the receiving portion 32 at an appropriate height from the bottom surface. The blow-in opening 33 communicates with the blow-in ports 26, 26,.

A humidification unit 50 is provided at a position lower than the ventilation heat exchange unit 6 in the compartment 3. A dripping nozzle 46 is disposed immediately above the humidifying unit 50. The drip nozzle 46 has a connection port 3
The first water supply pipe 35 connected to the first water supply pipe 4 is connected to the first water supply pipe 35. An opening / closing valve 45 is provided in the middle of the first water supply pipe 35. The first water supply line 35 supplies the drain water condensed in the air inlet 26 of the ventilation heat exchange unit 6 to the humidification unit 50. Further, a drain pipe 43 having an opening / closing valve 44 is branched and connected from the middle of the first water supply pipe 35 to the outside of the refrigerator. One end of the first water supply pipe 35 is connected to the drain pan 38, and the other end of the second water supply pipe 39 having the open / close valve 40 is connected to the first water supply pipe 35. The second water supply pipe 39 supplies drain water condensed on the surface of the evaporator 9 to the humidification unit 50. A drain pipe 41 having an open / close valve 42 in the middle of the second water supply pipe 39.
Are branched and connected to the outside of the refrigerator. Further, a third water supply line 47 from a water supply system 48 having an open / close valve 49 is also connected to the first water supply line 35.

The humidifying unit 50 is supported on a drain pan 51 that receives drain water. A drain pipe 53 having an open / close valve 54 for draining water to the outside of the refrigerator is provided with a drain pan 51.
It is connected to the. A blower 5 for blowing air inside the refrigerator to the humidification unit 50 near the humidification unit 50 in the refrigerator 3
2 are deployed. The open / close valves 40, 42,
44, 45, 49, and 54 may be manually or electrically driven as necessary.

As a specific example of the humidifying unit 50, for example, a humidifying unit 5 as shown in FIGS.
0a. The humidifying unit 50a includes a plurality of plate-like water absorbing members 55, 55,.
., And spacers 57, 57,... The space is provided with ventilation passages 58 and 5 through which the air from the blower 52 flows.
8, ... The water absorbing material 55 is made of, for example, a hydrophilic porous synthetic resin having a plate thickness of about 2 mm (for example, open-cell polyethylene foam). This polyethylene foam has, for example, an apparent density of 0.6 to 0.46.
g / cm ³ , porosity 35-50%, pore size 20-4
It has a thickness of 0 μm and a water absorption of 35 to 50%. The height of the water-absorbing material 55 in the upright state is not particularly limited, but is preferably, for example, about 12 to 13 cm from the balance between the moisture evaporation performance and the component cost.

The bottom of the drain pan 51 is provided with a connection port 60 which penetrates vertically, and the upper portion of the connection port 60 is a projection 59 for supporting the humidifying unit 50a by slightly lifting it from the bottom of the drain pan 51. Thereby, the water W can be stored on the bottom surface of the drain pan 51. The lower end of the water absorbing material 55 extends below the spacer 57 and is immersed in the water W. A drain pipe 53 is connected to a lower portion of the connection port 60. In addition, the water absorbing material 55,5
The nozzle holes 61, 61,... Are formed in the drip nozzles 46 just above the respective water-absorbing materials 55, 55,. ing. Note that the dripping nozzle 46 is omitted and the first water supply line 3 is omitted.
5 may be directly connected to the drain pan 51. Even in such a configuration, the water W directly guided from the first water supply pipe 35 into the drain pan 51 is sucked up by the water absorbing material 55 by a capillary phenomenon and evaporates.

Next, an example of storing fruits (an example of agricultural products) in the cool box 1 having the above configuration will be described. Refrigerant circuit 7
After the inside air is cooled by the evaporator 9 of the cooling unit 5 by the operation of, the air is returned to the inside 3 from the outlet 14. At this time, the internal temperature control device controls each device of the refrigerant circuit 7 to maintain the internal temperature at, for example, 2 to 5 ° C. Then, the fruit is stored in the refrigerator 3 and stored. As the storage period elapses, ethylene gas is generated from the fruits, and the ethylene concentration in the storage 3 increases, and at the same time, the humidity of the air in the storage decreases due to the dehumidification in the evaporator 9.

Therefore, for example, the blower 29 of the ventilation heat exchange unit 6 is driven at appropriate time intervals. Then, the outside air is taken into the air passage 23 from the outside air inlet 25 and is blown into the interior 3 from the air inlet 26. As the outside air is blown in this way, the inside air is discharged from the inside air outlet 27 to the exhaust path 2.
4 and is discharged from the outlet 28 out of the refrigerator. That is, the ethylene gas concentration in the storage 3 is reduced by discharging the air in the storage in which the ethylene gas has been increased to the outside of the storage,
Suppresses the decrease in fruit freshness.

At the same time, the outside air of the air inlet 23 and the exhaust air 24
The low-temperature internal air exchanges heat with sensible heat via the partition wall 22, so that the outside air is cooled and taken into the internal storage 3. Therefore, the cold heat of the air in the refrigerator is hardly taken out of the refrigerator, and wasteful energy consumption does not occur. By the way, in many cases, the moisture in the outside air is condensed on the surface of the partition wall 22 on the side of the air passage 23 due to the heat exchange. The water condensed at this time flows down and accumulates on the bottom surface of the receiving pan 32, and is guided from the connection port 34 to the drip nozzle 46 via the first water supply pipe 35. Dripping nozzle 46
Are dropped from the nozzle holes 61, and penetrate into the water absorbing members 55, 55,... Of the humidifying unit 50a.
By the air blown from the blower 52 to the ventilation passages 58, 58,..., The water W evaporates from the surfaces of the water absorbing materials 55, 55,. . Therefore, the moisture in the outside air brought in from the air intake passage 23 is surely used for adjusting the humidity of the interior 3. still,
The water W flowing down the water absorbing material 55 is stored on the bottom of the drain pan 51 and waits for evaporation. When the amount of drain water is larger than a predetermined amount, the water W in the drain pan 51 passes through the projecting portion 59 and is discharged to the outside through the drain pipe 53 and the open / close valve 54.

Although an example has been described above in which the drain water generated in the ventilation heat exchange unit 6 is supplied to the humidification unit 50a, the present invention is not limited to this. For example, the opening / closing valve 45 is closed and the opening / closing valve 44 is opened so that the drain water of the ventilation heat exchange unit 6 is discharged outside the refrigerator. Then, the drain water condensed on the surface of the evaporator 9 is supplied to the second water supply line 3.
9 and the opening / closing valve 40 to supply the water to the humidifying unit 50a, or the water from the water supply system 48 to the humidifying unit 50a via the second water supply line 47 and the opening / closing valve 49.
a may be supplied. Of course, water may be supplied from all of the receiving part 32, the drain pan 38, and the water supply system 48.

Next, FIG. 6 shows a main part of a cool box according to another embodiment. In this cool box, the inside of a rectangular box-shaped unit case 62 includes an exhaust passage 67 having a fan opening 68 by a partition wall 63 and a partition wall 64, an inside air outlet 27 directly connected to the exhaust passage 67, and an exhaust passage. 67 and a branch air passage 66 branched from the inside air outlet 27. The branch air passage 66 and the bottom surface inside the inside air outlet 27 are configured to be able to store water, and communicate with each other through a water hole 65 formed at the lower end of the partition wall 64. The blower 20 is provided near the fan opening 68 in the exhaust path 67.

A ventilation heat exchange unit 6 a is provided downstream of the inside air outlet 27 in the air flow direction in the exhaust path 67, and a humidification unit 50 a is provided in the branch air path 66. The humidification unit 50a humidifies the air sent from the blower 20 to the branch air passage 66. The unit case 62 above the humidifying unit 50a is
It is open to blow air that has passed through Oa into the refrigerator. Further, the inside air outlet 27 communicates with an outlet 28 via an exhaust passage 24 (not shown). The outside air inlet 25 connected to the side surface of the unit case 62 passes through the air passage 23 (not shown), and the air inlet 26 on the side surface of the unit case 62.
Is in communication with Ventilation heat exchange unit 6a used here
Is different from the ventilation heat exchange unit 6 described above,
3, a partition 22 and an exhaust path 24, but without a blower (the same applies hereinafter).

In the cool box having the ventilation heat exchange unit 6a and the humidification unit 50a, when the blower 20 is driven, the air in the box is sucked into the exhaust passage 67 from the fan opening 68, and the inside air outlet 27 and the branch air passage 66 Divided into the inflow. The air that has entered the exhaust passage 24 of the ventilation heat exchange unit 6a from the inside air outlet 27 exchanges heat with the outside air blown into the refrigerator from the outside air inlet 25 via the air inlet 23 and the air inlet 26, and then the air outlet 28 From the warehouse. At this time, the moisture in the outside air becomes drain water and accumulates on the bottom surface of the unit case 62 and flows into the branch air passage 66 through the water passage hole 65. The inflowing drain water is sucked up by the water absorbing material 55 of the humidifying unit 50a, evaporates, and humidifies the air passing from the branch air passage 66 through the ventilation passages 58, 58,. The humidified air is blown out from the upper opening of the unit case 62 into the storage. That is, in this cool box, the air to the ventilation heat exchange unit 6a and the humidification unit 50a can be shared by one blower 20. Thereby, the number of fans installed can be reduced, and the ventilation heat exchange unit 6a
And the humidifying unit 50a can be made compact.

FIG. 7 shows a main part of a cool box according to still another embodiment. In this cool box, an opening 84 is formed in a side surface of the unit case 70 having a rectangular box shape.
4 is connected to the air inlet 26 of the ventilation heat exchange unit 6 a via a connection duct 69. Also, the unit case 7
The fan opening 72 in which the blower 20 is provided is provided on the back side of the fan 72.
Is formed, and an air passage in the unit case 70 connecting the opening 84 and the fan opening 72 is an air intake passage 73. Further, a merging air passage 71 connecting the suction side of the blower 20 and the front opening of the unit case 70 is merged and connected to the air inlet passage 73. A humidifying unit 50a is provided in the merging air passage 71. Above the humidification unit 50a, a drip nozzle 46 connected to the second water supply line 39 (or the third water supply line 47) is arranged to supply water to the humidification unit 50a. The bottom surface of the unit case 70 is configured to be able to store water, and the water absorbing material 5 of the humidifying unit 50a is provided.
The water is sucked up by 5, 55,.

In this cool box, when the blower 20 is driven, the confluence air path 7
1 is taken in and is humidified in the ventilation passages 58, 58,... Of the humidification unit 50a. The humidified air is blown out from the fan opening 72 through the air inlet passage 73 into the refrigerator. At this time, the resistance of the air flowing through the merging air passage 71 increases due to the presence of the humidifying unit 50a, and the negative pressure increases on the suction side of the blower 20 in the air inlet passage 73. Using this negative pressure as a driving source, outside air is taken in from the outside air inlet 25 and is sucked into the blower 20 through the air inlet 23 (not shown), the air inlet 26, the connection duct 69, the opening 84, and the air inlet 73. Is blown out of the fan opening 72 into the refrigerator. Therefore, in this cool box, the ventilation to the ventilation heat exchange unit 6a and the humidification unit 50a can be shared by one blower 20, and the ventilation heat exchange unit 6a and the humidification unit 50a
Can be made compact.

Further, as another specific example of the humidifying unit 50, as shown in FIG. 8, a humidifying unit 50b using a moisture permeable bag 77 can be mentioned. The humidifying unit 50b includes a plurality of moisture-permeable bags 77, 77,.
... and fixed. Moisture permeable bags 77, 77,
Are air passages 83, 83,... Through which air from the blower 52 (FIG. 2) passes. A water passage 75 is formed in each of the spacers 74, 74,... Other than the front end, and the water passage 75 at the end communicates with the connection port 76. The third water supply pipe 47 is connected to the connection port 76 to supply tap water.

The moisture-permeable bag 77 is formed by making the moisture-permeable membrane 78 into a bag shape, and the space 79 in the bag is filled with water. The moisture-permeable bag 77 is provided with a tubular member 81 at one end of a space 79 in the bag, and water passage holes 80 are formed at positions facing the tubular openings at both ends of the tubular member 81. A water passage hole 82 communicating the water passage hole 80 and the space 79 in the bag is formed in the peripheral surface of the cylindrical member 81. The moisture-permeable bag 77 is disposed at a position where the water passage holes 80, 80 face the opening of the water passage 75, so that the water passage 75, the water passage hole 80, the tubular member 81, and the water passage hole 8.
, 0, the water conduits 75,... Communicate in series, and the respective water holes 82, 82,.
・ ・ It is designed to communicate with you.

The moisture permeable membrane 78 is made of a continuous porous synthetic resin sheet (for example, a porous polytetrafluoroethylene sheet) that is permeable to water vapor and impermeable to water. The hole diameter is, for example, about 0.2 μm. Then, when tap water from the water supply system 48 is supplied to the humidifying unit 50b, the tap water flows into the space 79 inside the bag via the water passage 75, the water hole 80, the cylindrical member 81, and the water hole 82. . The water in the bag space 79 cannot pass through the hole of the moisture permeable membrane 78 as it is as a liquid, but the water at the portion facing the hole of the moisture permeable membrane 78 evaporates and becomes water vapor and passes through the hole. Humidify the air.

In this case, Staphylococcus aureus (about 1.0 mm in diameter)
μm Gram-positive cocci) and Legionella bacteria (width 0.5-
Gram-negative bacilli, 0.7 μm long and 2.0-20 μm long)
Even if is contained in the water in the bag space 79, these malignant bacteria and mold spores cannot pass through the holes of the moisture permeable membrane 78 and do not come out of the moisture permeable bag 77. Thereby, the ventilation paths 83, 8
The humidification unit 50 does not produce putrefaction odor or mold odor due to no propagation of malignant bacteria and generation of mold in 3,.
The cool box having b is particularly suitable for food preservation. Further, since tap water from the water supply system 48 having a water pressure is used as a water supply source, the amount of generated steam can be increased, so that the humidity can be quickly controlled. However, the water supply source of the humidification unit 50b is not limited to the tap water from the above-mentioned water supply equipment 48. For example, if there is a head difference of 30 cm or more, the evaporator 9
(The second water supply line 39) or the water from the ventilation heat exchange unit 6, 6a (the first water supply line 35) can be used as the water supply source.

The heat exchange system of the ventilation heat exchange unit of the present invention is not limited to the counter-current system in which the outside air and the inside air flow in opposite directions. It may be a cross-flow type that is distributed. Further, the water-tight material used for the ventilation heat exchange unit of the present invention is not particularly limited, but is not limited to the above-mentioned plastic, and for example, metal or ceramic can be used. The constituent material of the water-absorbing material used in the humidifying unit 50a is not limited to the above-described hydrophilic porous synthetic resin, and may be, for example, cloth, gauze, water-resistant paper, sponge, or the like.

[0034]

As described above in detail, according to the cool box according to the present invention, since the ventilation heat exchange unit for exchanging the air inside the chamber while introducing heat and exchanging heat with outside air is provided, the structure is simple and inexpensive. This removes ethylene in the refrigerator, and does not wastefully discharge cold in the refrigerator when ethylene is removed. In addition, even when moisture in the outside air condenses in the air intake path of the ventilation heat exchange unit and does not contribute to humidification inside the refrigerator as it is, water vapor can be supplied into the refrigerator by the humidification unit. Can be prevented. Therefore, it is possible to favorably store at low temperature for a long period of time while maintaining the freshness of the agricultural product.

When the first water supply line or the second water supply line is provided, drain water condensed in the air inlet of the ventilation heat exchange unit or drain water condensed on the evaporator surface can be supplied to the humidification unit. . This makes it possible to eliminate the supply of water from another facility or to reduce the amount of wastewater discarded to the outside of the refrigerator, thereby simplifying the water supply facility and the drainage facility.

When a merging air path or a branch air path is provided in the intake path or the exhaust path, a single blower can share the air supply to the ventilation heat exchange unit and the humidification unit. Therefore, the number of fans to be installed can be reduced, and the combination of the ventilation heat exchange unit and the humidification unit can be made compact.

[Brief description of the drawings]

FIG. 1 is an external view showing a cool box according to an embodiment of the present invention.

FIG. 2 is a side sectional configuration view of the cool box.

FIG. 3 is a schematic configuration diagram viewed along a line AA in FIG. 1;

FIG. 4 is an external view of a humidifying unit provided in the cool box.

FIG. 5 is a side sectional configuration diagram of the humidification unit.

FIG. 6 is a configuration diagram for explaining a combination arrangement of a ventilation heat exchange unit and a humidification unit.

FIG. 7 is a configuration diagram for explaining another combination arrangement of a ventilation heat exchange unit and a humidification unit.

FIG. 8 is a side sectional configuration view showing another example of the humidification unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cold storage 2 Storage main body 3 Storage inside 6, 6a Ventilation heat exchange unit 7 Refrigerant circuit 9 Evaporator 20 Blower 22 Partition wall 23 Inlet path 24 Exhaust path 29 Blower 32 Receiving part 35 First water supply line 38 Drain pan 39 Second water supply Pipe line 46 Dropping nozzle 50, 50a, 50b Humidifying unit 51 Drain pan 52 Blower 55 Water absorbing material 66 Branch air path 67 Exhaust path 71 Merging air path 73 Inlet path 77 Moisture permeable bag W Water

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshiaki Yamaguchi 6-5-666 Teira, Wakayama-shi, Wakayama F-term in Washi Technica Co., Ltd. 3L045 AA01 BA01 CA02 DA01 EA01 KA12 3L048 AA01 BA01 CA02 CB05 DA01

Claims (4)

[Claims] 1. An insulated air passage for introducing outside air into a refrigerator, which is arranged adjacent to the air intake passage in a refrigerator in which the inside of the refrigerator accommodating agricultural products is cooled by an evaporator constituting a part of a refrigerant circuit. An exhaust passage for exhausting the air inside the refrigerator to the outside of the refrigerator, a ventilation heat exchange unit comprising a partition partitioning the air intake passage and the exhaust passage so as to allow heat exchange, and an air intake passage or exhaust for the ventilation heat exchange unit. A cool box characterized by comprising a blower for blowing air on a road, and a humidifying unit for evaporating supplied water and humidifying the inside of the refrigerator. 2. The cold storage according to claim 1, further comprising a first water supply pipe for supplying drain water condensed in an air passage of the ventilation heat exchange unit to the humidification unit. 3. The cold storage according to claim 1, further comprising a second water supply pipe for supplying drain water condensed on the surface of the evaporator to the humidification unit. 4. An air intake path or an exhaust path in which a blower of a ventilation heat exchange unit is provided, the air supply path including one of a merging air path merging with the air path and a branch air path branching from the exhaust path. The humidifying unit is provided in either the merged air passage or the branch air passage, and the air sent from the blower is humidified and blown into the storage. Refrigerator.