JP2006078013A - Refrigerated container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress movement of heat from a room at a relatively high temperature for storing refrigerated articles to a room for storing frozen articles as much as possible, in a refrigerated container with a refrigerated floor material. <P>SOLUTION: In the refrigerated container of which inside is separated into a front room 2A at a front wall side and a rear room 2B at a rear wall side by a partition 13 provided in a container 2, a bottom wall of the container is formed by setting the refrigerated floor material 4 consisting of a bottom face panel and a plurality of supporting parts in a rail shape of which section area is in a T-shape integrally erecting on the bottom face panel at regular intervals. A plurality of slits s are formed in the refrigerated floor material 4 at setting intervals in a longitudinal direction. A blocking material 12 for preventing cool air distribution in a front-rear direction of the slit s capable of supporting the partition 13 is provided for a slit s and spacers having a plurality of opening parts for allowing cool air distribution in the front-rear direction of the slit s is provided on the rest of slits s. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigeration container.

  In general, in order to reduce the unit price of transportation, it is necessary to secure a baggage full of transportation equipment at the time of a round trip. In this case, when transporting cargo that does not require temperature management, cargo can be secured by mixed loading, but when transporting cargo that requires temperature management, the restriction that the management temperature is the same is added. It becomes difficult.

  For this reason, in refrigeration trucks and refrigerated containers, the cargo compartment is divided into a plurality of rooms with heat-insulating partitions, and the partitions are movable so that they can be adjusted to the cargo volume. The interior is controlled in a plurality of temperature zones by arranging an internal unit (heat exchanger) and managing the temperature at individual temperatures (see, for example, Patent Documents 1 and 2).

On the other hand, in refrigeration trucks and refrigerated containers, in order to promote the circulation of cold air and to reduce the frictional resistance by reducing the contact area when moving the floor of the loaded cargo, A bottom wall is provided in which a frozen floor material composed of a plurality of support portions each having a T-shaped cross section that is erected integrally at regular intervals is laid on a heat insulating material (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 10-59057 JP-A-5-238306 JP-A-8-189169

  By the way, when a frozen product (−20 ° C. level) and a refrigerated product such as fresh food (0 ° C. to 15 ° C.) are mixed in a freezer truck or a freezing container, the temperature difference between the two rooms is large, so the higher temperature side A large amount of heat moves from the room to the room on the low temperature side along the inner wall. As a result, the room on the high temperature side may be overcooled, or the room on the low temperature side may be insufficiently cooled, which may reduce the quality of the cargo.

  In this case, in order to prevent overcooling of the room on the high temperature side, as described in Patent Documents 1 and 2, heating using cooling water of the engine or high temperature refrigerant of the refrigerator is performed. However, it is necessary to connect the refrigerator and engine to the inside of the warehouse, which not only complicates the structure, but also causes problems such as leakage of cooling water and refrigerant due to faulty piping work. . When such a failure occurs during unmanned transport of a refrigerated container, for example, during rail transport, the product value may be lost because it cannot be handled for a long time.

  In addition, because frozen flooring has a large cross-sectional area and usually uses aluminum extruded products with high thermal conductivity, a large amount of heat is transferred through the frozen flooring, and the cold air generated by the frozen flooring A lot of heat circulates through the passage. For this reason, when dividing the interior of the warehouse into a plurality of rooms by partitions, it is necessary to form the partitions in accordance with the cross-sectional shape of the frozen flooring and block the cold air passage by the frozen flooring, but the entrance is narrow and the interior is Due to the wide cross-sectional shape of the frozen flooring material, it is difficult to form the partition in accordance with the cross-sectional shape of the frozen flooring material, and the cold air passage cannot be reliably blocked. Moreover, the structure of a partition becomes complicated and there exists a fault that installation work of a partition takes time. Moreover, even if the cold air passage by the frozen floor material is shielded, it is inevitable that a large amount of heat moves through the frozen floor material having a large cross-sectional area.

  The present invention has been made in view of such problems, and in a refrigerated container having a refrigerated floor material, heat is transferred from a relatively high temperature room containing refrigerated goods to a room containing frozen goods. A refrigerated container that can be suppressed as much as possible is provided.

  The present invention comprises a container formed of a bottom wall, a ceiling wall, left and right side walls, a front wall and a rear wall each having heat insulation properties, and a refrigeration unit provided on the outer surface of the front wall of the container. The interior is partitioned into a front chamber on the front wall side and a rear chamber on the rear wall side through a partition that can be moved along, and the bottom wall is integrated with the bottom plate and the bottom plate at equal intervals. In the refrigerated container comprising a refrigerated floor material comprising a plurality of support parts having a T-shaped cross section that is erected on the side, a plurality of slits are formed in the refrigerated floor material at set intervals in the longitudinal direction. The one slit is provided with a closing material capable of supporting the partition while preventing the cold air from flowing in the front-rear direction of the slit, and allows the remaining slit to flow the cold air in the front-rear direction of the slit. Spares with multiple openings It is characterized in that the support is arranged.

  According to the present invention, after loading cargo, for example, frozen products on the frozen floor material serving as the front chamber, after the loaded cargo among the spacers arranged in advance in each slit formed in the frozen floor material. The spacer arranged in the slit corresponding to the end is extracted, and a closing material is arranged instead. Next, the partition is fixed on the inner surface of the container located on the closing material, while the cargo, for example, refrigerated goods are loaded on the frozen floor material as the rear chamber, the rear wall is closed, the refrigeration unit is operated, The chamber is cooled to the freezing temperature while the rear chamber is cooled to the refrigeration temperature.

  Here, the frozen flooring is separated without being continuous in the longitudinal direction by a plurality of slits, and heat does not move in the front-rear direction from the high temperature side to the low temperature side through the flooring material having a large cross-sectional area. On the other hand, at the partition installation position, the flow of cold air in the front-rear direction of the slit is blocked by the closing material disposed in the slit. For this reason, it is possible to prevent the cool air from flowing between the front chamber and the rear chamber by the partition and the closing material.

  As a result, it is possible to suppress heat transfer from the high temperature side to the low temperature side between the front chamber and the rear chamber.

  However, spacers are arranged in the slits other than the slits in which the closing material is arranged, and the flow of cool air in the front-rear direction is allowed through the spacers. Separately circulated and maintained at the set temperature.

  In the present invention, the front chamber partitioned by the partition is set to the low temperature side and the rear chamber is set to the high temperature side, and the front chamber is cooled to the freezing temperature by the refrigeration unit, while the rear chamber cools the cool air in the front chamber. It is preferable to guide to the chamber and cool.

  According to the present invention, in a refrigerated container provided with a frozen flooring, it is possible to suppress as much as possible the transfer of heat from a relatively high temperature room containing refrigerated goods to a room containing frozen goods, Each chamber can be efficiently maintained at a set temperature.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the refrigerated container 1 of the present invention.

  The refrigerated container 1 is a container comprising a bottom wall 2a, a ceiling wall 2b, left and right side walls 2c, a front wall 2d and a rear wall 2e that are pivotally supported so as to be openable and closable with respect to the left and right side walls 2c. 2 and a refrigeration unit 3 provided on the outer surface of the front wall 2d of the container 2, and the internal space of the container 2 is divided into a front chamber 2A on the front wall 2d side and a rear wall 2e side by a partition 13 described later. It is partitioned into a rear chamber 2B.

  The bottom wall 2a of the container 2 is formed by laying a frozen flooring 4 on a heat insulating material. The frozen flooring 4 is composed of a bottom plate 41 and a plurality of support portions 42 having a T-shaped cross section that are integrally provided on the bottom plate 41 at equal intervals. The front wall 2d and the rear wall 2e 4A and the plurality of unit floor materials 4B laid between the end floor materials 4A and 4A through the slits s. . For example, in the case of a 40-foot container, about 3 cm end floor material 4A laid along the front wall 2d and the rear wall 2e respectively, and about 40 cm laid in order with a slit s of about 60 mm between them. It is divided into 11 unit floor materials 4B.

  In addition, in order to compensate for the strength reduction of the bottom wall 2a due to the frozen flooring 4 being cut off through the slit s, the place where the slit s is formed, as shown in FIG. A heat insulating block material 5 such as wood or resin is disposed on the container bottom plate 2a ′. The heat insulating block material 5 is disposed between the end floor material 4A and the container bottom plate 2a ′ and between the unit floor material 4B and the container bottom plate 2a ′. And are respectively fastened via bolts. In addition, in order to prevent a load from acting directly on the heat insulating block member 5, a metal mounting plate 411 having the same strength as the bottom plate 41 of the frozen floor member 4 is screwed to the upper surface of the heat insulating block member 5. . In this case, the mounting plate 411 is formed slightly shorter than the length of the slit s so that the end surface thereof does not come into contact with the end surface of the end floor material 4A and the end surface of the unit floor material 4B, and is fixed via a sealing material. Has been.

  Each slit s normally has a large number of through holes in the front-rear direction so as not to generate a step between the adjacent end floor material 4A and the unit floor material 4B and between the adjacent unit floor materials 4B and 4B. A spacer 11 (see FIG. 3) in which the opening 11a is formed is disposed. For this reason, the spacer 11 can distribute the cold air flowing along the end floor material 4A to the adjacent unit floor material 4B, and the cold air flowing along the unit floor material 4B to the adjacent unit floor material 4B. Can be distributed. Further, the cargo can be smoothly moved in the front-rear direction.

  On the other hand, as will be described later, when the partition 13 is fixed, a closing member 12 is disposed instead of the spacer 11. As shown in FIG. 4, the closing material 12 is formed in a substantially T shape by wood, and is placed on the mounting plate 411 through the slit s, and over the end floor material 4A and the unit floor material 4B. Or it is mounted over the adjacent unit flooring 4B, 4B. For this reason, when the closing material 12 is disposed in an arbitrary slit s, the cold air flowing along the end floor material 4A is blocked in the slit s so as not to flow to the adjacent unit floor material 4B. The cold air flowing along the unit floor material 4B is blocked from flowing to the adjacent unit floor material 4B.

  Specifically, the closing material 12 is disposed between the end floor material 4A on the front wall 2d side and the unit floor material 4B on the rear side, and the partition 13 is disposed on the closing material 12 so as to reduce the minimum volume. Closing material between the case where the front chamber 2A (the rear chamber 2B having the maximum volume) is formed (see the state indicated by the one-dot chain line in FIG. 1) and the end floor material 4A on the rear wall 2e side and the unit floor material 4B in front thereof. 12 and a partition 13 on the closing material 12 to form the maximum volume front chamber 2A (minimum volume rear chamber 2B) (see the two-dot chain line state in FIG. 1), these In the middle, the closing material 12 is arranged between any adjacent unit floor materials 4B and 4B, and the case where the partition 13 is arranged on the closing material 12 to form the front chamber 2A and the rear chamber 2B is selected. Against the volume of frozen or refrigerated cargo It is possible to change the volume of the front chamber 2A and the rear chamber 2B with.

  Here, the partition 13 has heat insulation properties, and as shown in FIG. 5, the partition 13 is formed in a rectangular shape substantially corresponding to the inner shape of the container 2 and can be folded in two via the hinge sheet 13e. The partition 13 is provided with a sealing material 13a (see FIG. 1) around it, and is provided with a fixing belt 13b having mounting brackets 13c on one surface and a plurality of air ribs 13d on both surfaces. It is provided and formed.

  Accordingly, the closing member 12 is disposed in an arbitrary slit s, and the partition 13 is carried into the container 2 and erected on the closing member 12, and then the lashing rail disposed on the inner surface of the side wall 2 c of the container 2 is engaged. The rear end of the end floor material 4A on the front wall 2d side and the end floor material on the rear wall 2e side are obtained by locking the mounting bracket 13c to a stop (not shown) and stretching the fixing belt 13b. Between the front ends of 4A, the partition 13 can be fixed at an arbitrary position in the container 2 with the length interval of the unit flooring 4A.

  At this time, the partition 13 has a seal member 13a provided around it on the upper surface of the closing member 12, the inner surfaces of the left and right side walls 2c, and the outer surface of the flat ventilation duct 14 provided on the ceiling wall 2b, which will be described later. Because of the close contact, the leakage of heat between the front chamber 2A and the rear chamber 2B can be suppressed as much as possible in cooperation with the closing member 12. And since the frozen flooring 4 of the bottom wall 2a is cut | disconnected by the slit s without continuing in the front-back direction, heat does not move through the frozen flooring 4. In addition, an air passage can be secured between the air rib 13d and the cargo, and it is possible to prevent the cargo from contacting the partition 13 and transferring heat directly to the cargo.

  On the other hand, the inner surface of the ceiling wall 2b of the container 2 has a width substantially corresponding to the inner surface distance between the left and right side walls 2c, is located in the vicinity of the front wall 2d and has one end opened to the front chamber 2A and the rear wall 2e. A flat ventilation duct 14 having the other end opened to the rear chamber 2B at a fixed distance from is fixed. The ventilation duct 14 has a substantially middle in the width direction and is divided into left and right by a partition wall 14a (see FIG. 6). Of these, the right ventilation path 14R is seen from the rear wall 2e side to the front wall 2d side. The cool air in the front chamber 2A is set to guide the cool air to the rear chamber 2B, and the left vent passage 14L is set to guide the cool air in the rear chamber 2B to the front chamber 2A. The shutter 15 is rotatable at the front wall 2d side opening and the rear wall 2e side opening of the right ventilation path 14R and the front wall 2d side opening and the rear wall 2e side opening of the left ventilation path 14L. Is provided.

  Here, each shutter 15 normally closes each opening by its own weight, and when a cool air fan 17 to be described later is driven, each shutter 15 rotates against its own weight and moves from the front chamber 2A to the rear. Cold air can be guided to the chamber 2B, and relatively high-temperature cold air can be guided from the rear chamber 2B to the front chamber 2A. For example, as shown in FIG. 7, when the cool air fan 17 is driven, the shutter 15 rotates against its own weight, and the rear wall 2e side opening can be opened. It is possible to guide to the rear chamber 2B through the air passage 14R.

  Further, the rear end portion of the ceiling wall 2b has a width substantially corresponding to the inner surface interval of the left and right side walls 2c, and has a mixing chamber 16a inside and an opening communicating with the mixing chamber 16a in the front and rear. A box-shaped mixing duct 16 is fixed, and in the mixing chamber 16 a of the mixing duct 16, one cold air fan 17 and a plurality of circulation fans 18 are disposed. The other side of the suction duct 19 whose one end is connected to the opening on the rear wall 2e side of the right air passage 14R is connected to the front opening of the mixing duct 16 communicating with the mixing chamber 16a provided with the cool air fan 17. The ends are connected (see FIG. 8). On the other hand, an electric heater 20 is provided at the front opening of the mixing duct 16 that communicates with the mixing chamber 16a in which the circulation fan 18 is provided, and the front opening has the above-described left air passage. 14L is opened to the rear chamber 2B at a certain distance from the rear wall 2e side opening (see FIGS. 6 and 9). Further, the rear opening of the mixing duct 16 is formed so as to face only the mixing chamber 16a provided with the circulation fan 18, and the opening is formed on the inner surface of the rear wall 2e via the sealing material 16b. Is connected to an air passage 21 extending in the vertical direction.

  The mixing chamber 16a of the mixing duct 16 is partitioned by a partition wall 161 (see FIG. 6) between the cool air fan 17 and the circulation fan 18 on the suction side where the cool air fan 17 and the circulation fan 18 are disposed. . For this reason, the cold air in the front chamber 2A can be guided only to the cold air fan 17 through the ventilation duct 14 and the suction duct 19.

  Although not shown in detail, the refrigeration unit 3 is a motor, for example, a diesel engine provided with a fuel tank, a generator driven by the diesel engine, and an electric motor driven by using electricity generated by the generator. It is composed of a refrigeration system including a compressor, and is designed so that the refrigeration capacity can be maintained over a set time even when there is no power source, such as rail transport, ship transport, trailer transport.

  A heat exchanger 22 that exchanges heat with the evaporator of the refrigeration apparatus is provided at the front end of the ceiling wall 2b, and a fan 23 that supplies the cold air heat-exchanged by the heat exchanger 22 to the front chamber 2A. Is provided. An air passage 21 extending in the vertical direction is provided on the inner surface of the front wall 2d in order to guide the cool air supplied by the fan 23 downward.

  The refrigeration unit 3 is controlled by a control device (not shown), and the cold air fan 17, the circulation fan 18, the electric heater 20, and the fan 23 described above are wired to the control device and are connected via the control device. ON-OFF control.

  Next, the operation of the refrigerated container 1 configured as described above will be described.

  First, cargo (frozen goods) is loaded onto the frozen flooring 4 using a transportation device such as a forklift at the collection site. When the loading of the frozen product is completed, the spacer 11 at the position corresponding to the rear end is extracted from the slit s, and the closing material 12 is disposed instead, and then the partition 13 is built on the closing material 12 to be attached to the inner wall of the container 2. Attach and partition the container 2 into a front chamber 2A and a rear chamber 2B. Thereafter, similarly, cargo (refrigerated goods) is loaded on the frozen flooring 4 serving as the rear chamber 2B using a transportation device such as a forklift, and the rear wall 2e is closed.

  Thereafter, the refrigerated container 1 is transported toward the delivery place. Specifically, trucks can be used to transport trucks directly to delivery areas, or to trailers using freight stations to transport to the target freight station. Or, use a trailer to transport to the port, ship to the target port, and then transport the truck again from the port to the delivery location.

  When the refrigerated container 1 is transported from such a collection place to a delivery place, a two-temperature zone selection switch (not shown) for controlling the front chamber 2A to the refrigeration temperature and the rear chamber 2B to the refrigeration temperature is turned on. Then, the refrigeration unit 3 is operated.

  That is, when the diesel engine is driven by turning on the two temperature zone selection switch, the generator is driven, and the electric compressor of the refrigeration apparatus is driven by the electricity generated by the generator. When the electric compressor is driven, the refrigerant is compressed and supplied to the condenser, and cooled by the condenser to become a liquid having a high pressure. Thereafter, when the liquefied refrigerant is blown out to the evaporator through the expansion valve, the liquefied refrigerant is vaporized, and the heat of vaporization is taken from the periphery of the evaporator to be cooled. The refrigerant that has become gas is sucked into the electric compressor, and the refrigeration cycle is performed again.

  Here, the air in the front chamber 2A is sucked by the fan 23, is cooled by exchanging heat with the heat exchanger 22, and then supplied to the end flooring 4A through the air passage 21 provided in the front wall 2d. It is blown upward from the partial flooring 4A and the unit flooring 4B. In this way, the air in the front chamber 2A is circulated, and the interior of the front chamber 2A is controlled to maintain a set temperature, for example, −20 ° C.

  On the other hand, in the rear chamber 2B, the circulation fan 18 is driven, so that the air in the rear chamber 2B is sucked into the circulation fan 18 and passes through the air passage 21 provided in the rear wall 2e to the end floor material 4A. Supplied and blown upward from the end floor material 4A and the unit floor material 4B. In this way, the air in the rear chamber 2B is circulated, and the interior of the rear chamber 2B is controlled to maintain a set temperature, for example, 15 ° C.

  By the way, when the internal temperature of the rear chamber 2B detected by the temperature sensor 24 (see FIG. 6) exceeds the set temperature by a certain temperature, the cool air fan 17 is driven and the right air passage is connected via the suction duct 19. A suction force is applied to the shutter 15 provided in the opening on the rear wall 2e side of 14R. For this reason, the shutter 15 provided in the opening on the rear wall 2e side of the right ventilation path 14R and the shutter 15 provided in the opening on the front wall 2d side are rotated against their own weights. Therefore, the cold air in the front chamber 2A is sucked into the mixing block 16 through the right air passage 14R and the suction duct 19 of the ventilation duct 14, and is then fed from the cold air fan 17 side mixing chamber 16a to the circulation fan 18 side mixing chamber 16a and the rear wall 2e. Is supplied to the end floor material 4A through the air passage 21 provided in the air passage 21 and blown upward from the end floor material 4A and the unit floor material 4B.

  At this time, since the air in the rear chamber 2B is circulated by the circulation fan 18, the cold air in the front chamber 2A sucked into the mixing duct 16 and the cold air in the rear chamber 2B are mixed in the mixing chamber 16a of the mixing duct 16. And gradually cooled.

  Further, since the cool air in the front chamber 2A is supplied to the rear chamber 2B by the cool air fan 17, a positive pressure is generated in the rear chamber 2B. For this reason, the shutter 15 of the left vent passage 14L is rotated against its own weight, and the air in the rear chamber 2B is supplied to the front chamber 2A via the left vent passage 14L. That is, the air supplied from the front chamber 2A to the rear chamber 2B returns to the front chamber 2A from the rear chamber 2B by that volume, and always maintains an equilibrium state.

  In this case, since the opening on the front wall 2d side of the ventilation passage 14L on the left side of the ventilation duct 14 is opened in the vicinity of the front wall 2d, the cool air in the rear chamber 2B returned to the front chamber 2A is immediately cooled by the fan 23. The air is sucked and cooled by the heat exchanger 22. Therefore, the relatively high-temperature cold air that has been refluxed from the rear chamber 2B to the front chamber 2A is prevented from coming into contact with the cargo (frozen product) in the front chamber 2A, and the quality of the cargo is not degraded.

  As described above, when the air in the rear chamber 2B is cooled and reaches the set temperature, the temperature sensor 24 detects the temperature and stops the driving of the cool air fan 17.

  On the other hand, when the cool air of the front chamber 2A is guided to the rear chamber 2B or due to heat leakage from the rear chamber 2B to the front chamber 2A, the temperature of the rear chamber 2B is lower than the set temperature by a predetermined temperature or more. Then, when the cool air fan 17 is being driven, the drive of the cool air fan 17 is stopped and the electric heater 20 is operated to circulate the air in the rear chamber 2B via the circulation fan 18, and the sucked air is Heated by the electric heater 20. When the air in the rear chamber 2B is heated and reaches a set temperature, the operation of the electric heater 20 is stopped.

  As described above, when the temperature of the rear chamber 2B exceeds the set temperature, the cool air fan 17 is driven, the cool air in the front chamber 2A is guided to the rear chamber 2B, and the interior is cooled. When the temperature is lower than the set temperature, the electric heater 20 is operated, and the air in the rear chamber 2B is heated and circulated to easily control the internal temperature of the rear chamber 2B so as to maintain the set temperature. be able to. Moreover, it is only necessary to lay an electrical wiring between the refrigeration unit 3 and the rear chamber 2B, and the operation can be easily performed as compared with the case where the engine coolant or the high-temperature refrigerant is guided to the rear chamber 2B through the pipe. In addition, it is not necessary to consider the leakage of cooling water or refrigerant, and the degree of occurrence of defects is reduced.

  As described above, according to the present invention, when both frozen and refrigerated goods are mixed and improved in transport efficiency using a refrigerated container, the interior of each cabinet is surely set in two temperature zones corresponding to the frozen and refrigerated goods. In addition, it can be controlled over a long period of time, and the cargo can be transported from the shipper to the shipper without impairing the quality.

It is a longitudinal cross-sectional view which shows the outline of one Embodiment of the freezing container of this invention. It is sectional drawing which expands and shows the X section of FIG. It is a perspective view which shows a spacer. It is a perspective view which shows a closing material. It is a perspective view which shows an example of a partition. It is a top view which abbreviate | omits and shows the rear-end part of the refrigeration container of FIG. It is sectional drawing which shows the shutter provided in the ventilation path of the right side in a ventilation duct. It is a longitudinal cross-sectional view in the position corresponding to a cold air fan of a mixing duct. It is a longitudinal cross-sectional view in the position corresponding to a circulation fan of a mixing duct.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigeration container 2 Container 3 Refrigeration unit 4 Refrigeration floor material 4A End part floor material 4B Unit floor material 11 Spacer 12 Closure material 13 Partition 14 Ventilation duct 16 Mixing duct 17 Cold air fan 18 Circulation fan 20 Electric heater 22 Heat exchanger 23 Fan

Claims (2)

  It consists of a container formed of a bottom wall, ceiling wall, left and right side walls, front and rear walls, and a refrigeration unit installed on the outer surface of the front wall of the container, and can move along the inner surface of the container. The interior is partitioned into a front chamber on the front wall side and a rear chamber on the rear wall side through a partition, and the bottom wall is integrally erected on the bottom plate and the bottom plate at equal intervals. In a refrigerated container comprising a refrigerated floor material comprising a plurality of support portions having a T-shaped cross section, a plurality of slits are formed in the refrigerated floor material at set intervals in the longitudinal direction, while one slit In addition, a closing material capable of preventing the flow of cool air in the front-rear direction of the slit and supporting the partition is disposed, and a plurality of openings that allow the flow of cool air in the front-rear direction of the slit are provided in the remaining slits Spacer with part is arranged Refrigeration container, characterized in that it is. The front chamber partitioned by the partition is set to the low temperature side and the rear chamber is set to the high temperature side, and the front chamber is cooled to the freezing temperature by the refrigeration unit, while the rear chamber guides the cool air of the front chamber to the rear chamber. The refrigeration container according to claim 1, wherein the refrigeration container is cooled.

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