Freezing container

Abstract

The frozen container is provided with: a container main body having therein a freezing space to be cooled; a refrigerator configured so as to be able to cool the circulating gas sucked from the freezing space; a refrigerator case disposed inside the container main body and having a refrigerator accommodation space for accommodating the refrigerator therein; and a heat insulating member laminated on the outer wall surface of the refrigerator case. An outlet flow path for connecting the refrigerator accommodating space and the freezing space and guiding the circulating gas cooled in the refrigerator to the freezing space via the blow-out opening is formed inside the heat insulator.

Description

Technical Field

[0001] The present invention relates to a refrigerated container.

[0002] This application claims the priority based on Japanese Patent Application No. 2022-211782 and Japanese Patent Application No. 2023-212162 filed with the Japan Patent Office on December 28, 2022, and December 15, 2023, respectively, and incorporates their contents herein. Background Art

[0003] A refrigerated container is a container having a refrigeration function for refrigerating or storing items such as goods stored in a warehouse.

[0004] Patent Document 1 discloses an air refrigerant refrigeration device having: a freezing chamber that forms a freezing space; a compressor that sucks air in the freezing chamber and adiabatically compresses it; a primary cooler that cools the compressed air by heat exchange with a cooling fluid; and an expander that adiabatically expands the cooled compressed air. The air refrigerant refrigeration device divides the freezing space into two connected spaces via an insulating member, one space serving as a working space for cooling an object to be cooled, and the other space serving as a discharge space for discharging air used during cooling, and supplies the low-temperature air obtained by the expander to the freezing chamber to form a freezing space.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2008-180449 Summary of the Invention

[0008] Technical Problem to be Solved by the Invention

[0009] In Patent Document 1, a heat exchanger that may become a heat source is disposed inside the freezing space, so the heat insulation performance of the freezing chamber may decrease. If the heat insulation performance of the freezing chamber is low, it is necessary to increase the thickness of the insulating member provided on the inner surface of the freezing chamber, so there is a problem that the freezing space becomes smaller.

[0010] In view of the above circumstances, an object of at least one embodiment of the present invention is to provide a refrigerated container capable of improving the heat insulation performance of a freezing space.

[0011] Means for Solving the Technical Problem

[0012] The refrigerated container according to at least one embodiment of the present invention includes:

[0013] A container body having a freezing space to be cooled inside;

[0014] A refrigerator is configured to cool the circulated gas drawn from the refrigerating space;

[0015] A refrigerator housing is disposed inside the container main body and has a refrigerator accommodation space for accommodating the refrigerator therein; and

[0016] A heat insulator is laminated on the outer wall surface of the refrigerator housing,

[0017] An outlet flow path is formed inside the heat insulator. The outlet flow path is used to connect the refrigerator accommodation space and the refrigerating space, and guide the circulated gas cooled in the refrigerator to the refrigerating space via a blowout port.

[0018] Advantageous Effects of the Invention

[0019] According to at least one embodiment of the present invention, a refrigerated container capable of improving the heat insulation performance of a refrigerating space is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic perspective view of a refrigerated container according to an embodiment of the present invention.

[0021] Figure 2 is a schematic longitudinal sectional view of a container main body of a refrigerated container according to an embodiment of the present invention.

[0022] Figure 3 is a schematic longitudinal sectional view of a container main body of a refrigerated container according to an embodiment of the present invention.

[0023] Figure 4 is a diagram schematically showing a circuit of a refrigerator of a refrigerated container according to an embodiment of the present invention.

[0024] Figure 5 is from Figure 1 a view of a refrigerator housing of a refrigerated container according to an embodiment of the present invention as observed from the direction indicated by arrow A in

[0025] Figure 6 is a schematic perspective view of a refrigerator housing and a heat insulator of a refrigerated container according to an embodiment of the present invention.

[0026] Figure 7 is a schematic perspective view of a refrigerator housing and a heat insulator of a refrigerated container according to an embodiment of the present invention.

[0027] Figure 8 is a schematic perspective view of a refrigerator housing and a heat insulator of a refrigerated container according to an embodiment of the present invention.

[0028] Figure 9 It is a schematic diagram of the metal filter in an embodiment of the present invention.

[0029] Figure 10 It is a schematic cross-sectional view along a direction orthogonal to the length direction of the container body of the laying member laid on the refrigerated container according to an embodiment of the present invention.

[0030] Figure 11 It is an explanatory diagram for explaining the air outlet and air inlet of the refrigerated container according to an embodiment of the present invention.

[0031] Figure 12 It is an explanatory diagram for explaining the air outlet and air inlet of the refrigerated container according to an embodiment of the present invention.

[0032] Figure 13 It is an explanatory diagram for explaining the air outlet and air inlet of the refrigerated container according to an embodiment of the present invention.

[0033] Figure 14 It is an explanatory diagram for explaining the metal plate, hydrophobic layer and waterproof layer of the refrigerated container according to an embodiment of the present invention.

[0034] Figure 15 It is an explanatory diagram for explaining the metal plate on the outlet flow path side, hydrophobic layer on the outlet flow path side and waterproof layer on the outlet flow path side of the refrigerated container according to an embodiment of the present invention.

[0035] Figure 16 It is an explanatory diagram for explaining the metal plate on the inlet flow path side, hydrophobic layer on the inlet flow path side and waterproof layer on the inlet flow path side of the refrigerated container according to an embodiment of the present invention.

[0036] Figure 17 It is a schematic cross-sectional view along the length direction of the container body of the refrigerated container according to another embodiment.

[0037] Figure 18 It is a diagram for explaining the peripheral structure of the outlet flow path according to another embodiment.

[0038] Figure 19 It is a schematic cross-sectional view along a direction orthogonal to the length direction of the container body of the laying member laid on the refrigerated container according to another embodiment.

[0039] Figure 20 It is a schematic diagram (viewed from the front) showing the structure of the inlet flow path forming portion according to another embodiment.

[0040] Figure 21It is a schematic diagram (viewed from the side) showing the structure of the inlet flow path forming portion according to another embodiment.

[0041] Figure 22 It is a schematic diagram (viewed from the side) showing the structure of the inlet flow path forming portion according to a modified example of another embodiment.

[0042] Figure 23 It is a diagram for explaining the arrangement of two opposed surface heat insulators according to another embodiment. Detailed Embodiments

[0043] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the constituent parts described as embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, and are merely illustrative examples.

[0044] (Refrigerated Container)

[0045] Figure 1 It is a schematic perspective view of a refrigerated container 1 according to an embodiment of the present invention. As Figure 1 shown, the refrigerated container 1 includes a container body 2 having a refrigerated space 20 to be cooled inside. Goods and other items can be accommodated in the refrigerated space 20. The refrigerated container 1 is configured to be able to cool gases such as air existing in the refrigerated space 20. Specifically, the refrigerated container 1 further includes a refrigerator 3 for cooling the gas in the refrigerated space 20.

[0046] (Container Body)

[0047] As Figure 1 shown, the container body 2 has a plurality of walls 21 to 24 and is formed in a rectangular cylindrical shape extending along the length direction of the container body 2. Hereinafter, the horizontal direction orthogonal to the length direction of the container body 2 is defined as the width direction of the container body 2. The plurality of walls 21 to 24 include: a ceiling wall 21 extending along a direction orthogonal to the height direction of the container body 2; a bottom wall 22 extending along a direction orthogonal to the height direction of the container body 2 below the ceiling wall 21; and a pair of long side walls 23, 24 arranged at intervals from each other and respectively connecting the ceiling wall 21 and the bottom wall 22.

[0048] The container body 2 can be a transport container for transporting goods and the like. The container body 2 can be a standard transport container such as a 10ft container, a 20ft container, or a 40ft container.

[0049] (Refrigerator Housing)

[0050] Figure 2 And Figure 3It is a schematic cross-sectional view along the length direction of the container body 2 of the refrigerated container 1 according to an embodiment of the present invention. Figure 4 It is a diagram schematically showing the circuit of the refrigerator 3 of the refrigerated container 1 according to an embodiment of the present invention. Figure 5 From Figure 1 A view of the refrigerator housing 4 of the refrigerated container 1 according to an embodiment of the present invention as viewed from the direction indicated by the arrow A in. As Figures 1 - 3 shown, the refrigerated container 1 further includes a refrigerator 3 and a refrigerator housing 4. The refrigerator housing 4 is disposed inside the container body 2 and has a refrigerator accommodation space 40 for accommodating the refrigerator 3 therein.

[0051] In Figure 2 and Figure 3 the embodiment shown, the refrigerator housing 4 is disposed in the opening formed on one side ( Figure 2 , Figure 3 the left side in) in the length direction of the container body 2. The refrigerated container 1 further includes a door 25 that is disposed in the opening formed on the other side ( Figure 2 , Figure 3 the right side in) in the length direction of the container body 2 and is configured to be openable and closable. By opening the door 25, it is possible to move goods and other items or people between the outside of the container body 2 and the refrigerated space 20.

[0052] (Refrigerator)

[0053] The refrigerator 3 is configured to be able to cool the gas, that is, the circulating gas, sucked from the refrigerated space 20 via the suction port 27 (opening) for sucking air and other gases into the refrigerated space 20. The gas (circulating gas) cooled by the refrigerator 3 returns to the refrigerated space 20 via the blowout port 26 (opening) for blowing air and other gases into the refrigerated space 20. As Figure 4 and Figure 5 shown, the refrigerator 3 includes a compressor 31, a heat exchanger 32, and an expander 33. As Figures 2 - 5 shown, the refrigerated container 1 includes a circulation pipeline 28 having the above-described blowout port 26 and suction port 27. The compressor 31, the heat exchanger 32, and the expander 33 are respectively provided on the circulation pipeline 28. The circulation pipeline 28, the compressor 31, the heat exchanger 32, and the expander 33 constitute a refrigeration cycle for taking out the gas inside the refrigerated space 20, that is, the in-store gas, and using it as a heat medium. The refrigerated container 1 can adjust the temperature of the in-store gas by means of the refrigerator 3. In the illustrated embodiment, the refrigerator 3 can set the temperature of the in-store gas to an ultra-low temperature (below -40°C and above -120°C, preferably below -80°C).

[0054] (Compressor)

[0055] The circulation pipeline 28 is a passage extending from the suction port 27 to the blowout port 26, through which the circulated gas sucked from the refrigerating space 20 via the suction port 27 flows. The compressor 31 is configured to compress the gas (circulated gas) sucked from the refrigerating space 20 via the suction port 27. By driving the compressor 31, the gas (gas inside the storage) inside the refrigerating space 20 is sucked into the circulation pipeline 28 via the suction port 27. The circulated gas compressed in the compressor 31 is heated and pressurized compared with that before being introduced into the compressor 31, and becomes a high-temperature and high-pressure gas.

[0056] The heat exchanger 32 is configured to cool the high-temperature and high-pressure circulated gas compressed in the compressor 31. The expander 33 is configured to expand the circulated gas cooled in the heat exchanger 32. The low-temperature circulated gas expanded in the expander 33 is guided to the blowout port 26 through the circulation pipeline 28, and is blown out from the circulation pipeline 28 to the refrigerating space 20 via the blowout port 26.

[0057] The circulation pipeline 28 includes: a suction gas pipeline 28A for guiding the circulated gas sucked from the suction port 27 to the compressor 31; a compressed gas pipeline 28B for guiding the circulated gas compressed in the compressor 31 to the expander 33; and an expanded gas pipeline 28C for guiding the circulated gas expanded in the expander 33 to the blowout port 26.

[0058] (Heat exchanger)

[0059] The heat exchanger 32 is configured to perform heat exchange between the circulated gas flowing through the suction gas pipeline 28A and the circulated gas flowing through the compressed gas pipeline 28B. The circulated gas flowing through the compressed gas pipeline 28B becomes high-temperature compared with the circulated gas flowing through the suction gas pipeline 28A by being compressed in the compressor 31. Through the heat exchange in the heat exchanger 32, the circulated gas flowing through the compressed gas pipeline 28B is cooled by the circulated gas flowing through the suction gas pipeline 28A, and the circulated gas flowing through the suction gas pipeline 28A is heated by the circulated gas flowing through the compressed gas pipeline 28B.

[0060] (Cooler)

[0061] As Figure 4 and Figure 5 shown, the refrigerator 3 may further include a cooler 34 provided between the compressor 31 and the heat exchanger 32 on the compressed gas pipeline 28B. The cooler 34 is configured to perform heat exchange between the circulated gas flowing through the compressed gas pipeline 28B (circulation pipeline 28) and a coolant (for example, water) that is lower in temperature than the circulated gas. Through the heat exchange in the cooler 34, the circulated gas flowing through the compressed gas pipeline 28B toward the heat exchanger 32 is cooled by the coolant.

[0062] In Figure 4 andFigure 5 In the illustrated embodiment, the refrigerator 3 further includes a coolant circulation pipe 35 for circulating the coolant. The coolant is supplied to the cooler 34 via the coolant circulation pipe 35. Specifically, a radiator 361 that constitutes a cooling device 36 for cooling the coolant and a pump 37 for conveying the coolant in the coolant circulation pipe 35 are provided on the coolant circulation pipe 35. The cooling device 36 includes the radiator 361 and a fan 362 for air-cooling the radiator 361.

[0063] The coolant whose temperature has risen due to heat exchange with the circulating gas flowing through the compressed gas pipe 28B in the cooler 34 is conveyed by the pump 37 to the coolant circulation pipe 35 and is cooled by the cooling device 36 including the radiator 361. The coolant cooled by the cooling device 36 is supplied to the cooler 34 via the coolant circulation pipe 35. In addition, the refrigerant circulating in the coolant circulation pipe 35 is not limited to a liquid and may also be a gas. The refrigerant circulating in the coolant circulation pipe 35 may also be an antifreeze such as ethylene glycol water. The freezing point of the refrigerant circulating in the coolant circulation pipe 35 is preferably lower than the freezing point of water.

[0064] (Expander, electric motor)

[0065] In some embodiments, the expander 33 may be connected to the compressor 31 via a rotating shaft 38. In Figure 4 and Figure 5 the illustrated embodiment, the refrigerator 3 further includes an electric motor 39 configured to generate a driving force for driving the compressor 31. The compressor 31 includes an electric compressor configured to be driven by the electric motor 39 to compress the circulating gas. The compressor 31 and the expander 33 are arranged on the same axis via the output shaft, i.e., the rotating shaft 38, of the electric motor 39 for driving the compressor 31 and are respectively connected to the rotating shaft 38. The electric motor 39 is supplied with current from a power source (such as a generator) not shown and is driven by the current supplied from the power source to drive the rotating shaft 38, the compressor 31, and the expander 33. In the expander 33, a part of the expansion energy generated when the gas expands is recovered, and the recovered expansion energy is used to assist the driving of the compressor 31.

[0066] As Figure 5 shown, at least a part of the suction gas pipe 28A, the compressed gas pipe 28B, and the expanded gas pipe 28C is formed by pipes arranged inside the refrigerator housing 4 (the refrigerator accommodation space 40). In addition, each pipe forming the circulation pipe 28 may also be formed by connecting a plurality of pipe portions via a flange or the like.

[0067] In Figure 5In the illustrated embodiment, the piping forming the suction gas line 28A includes a pipe 281 provided between the inlet-side communication hole 48 formed in the refrigerator housing 4 and the inlet of the heat exchanger 32, and a pipe 282 provided between the outlet of the heat exchanger 32 and the compressor 31. The piping forming the compressed gas line 28B includes a pipe 283 provided between the outlet of the compressor 31 and the inlet of the cooler 34, a pipe 284 provided between the outlet of the cooler 34 and the inlet of the heat exchanger 32, and a pipe 285 provided between the outlet of the heat exchanger 32 and the inlet of the expander 33. The piping forming the expanded gas line 28C includes a pipe 286 provided between the outlet of the expander 33 and the outlet-side communication hole 47 formed in the refrigerator housing 4.

[0068] Considering the flow of gases (cool air) such as air in the refrigerated space 20, the air outlet 26 is preferably formed below the air inlet 27. The outlet-side communication hole 47 is preferably formed below the inlet-side communication hole 48.

[0069] (Heat insulator)

[0070] As Figure 2 and Figure 3 shown, the refrigerated container 1 further includes a heat insulator 5 laminated on the outer wall surface 41 of the refrigerator housing 4. The surface (end face) 51 of the heat insulator 5 on the refrigerated space 20 side in the length direction of the container body 2 extends along a direction orthogonal to the length direction of the container body 2, and separates the refrigerated space 20 and the refrigerator housing 4 (refrigerator accommodation space 40). Additionally, in Figure 2 and Figure 3 the illustrated embodiment, the surface 91 of the metal plate 9 laminated on the surface 51 of the heat insulator 5 faces the refrigerated space 20, but the surface 51 of the heat insulator 5 may also face the refrigerated space 20. The refrigerated space 20 is defined by the surface 51 of the heat insulator 5, the inner surfaces of the plurality of walls 21 to 24 constituting the container body 2, and the inner surface of the door 25. The air outlet 26 and the air inlet 27 are formed on the surface 51 of the heat insulator 5.

[0071] In some embodiments, as Figure 2 and Figure 3As shown, an outlet flow path 6 is formed inside the above-mentioned heat insulator 5. The outlet flow path 6 is used to connect the chiller accommodation space 40 and the freezing space 20, and guide the circulated gas cooled in the chiller 3 to the freezing space 20 via the blowout port 26. The outlet flow path 6 constitutes a part of the above-mentioned expansion gas pipeline 28C. One end of the outlet flow path 6 is formed with a blowout port 26, and the other end of the outlet flow path 6 is formed with an outlet opening 61 connected to the chiller accommodation space 40. The outlet opening 61 is connected to the outlet of the pipe 286 via the above-mentioned outlet side communication hole 47. The above-mentioned expansion gas pipeline 28C is formed inside the chiller housing 4 and the heat insulator 5.

[0072] According to the above structure, by arranging the heat insulator 5 between the chiller housing 4 and the freezing space 20, and arranging the chiller 3 that may become a heat source inside the chiller housing 4, the heat insulation performance of the freezing space 20 can be relatively improved. When the heat insulation performance of the freezing space 20 is high, the thickness of the heat insulator installed on the inner surface (the inner surfaces of the respective walls 21 to 24) of the container main body 2 (stacked on) can be correspondingly reduced, so that the storage space inside the refrigerated container 1, that is, the freezing space 20, can be expanded.

[0073] Moreover, according to the above structure, by forming the outlet flow path 6 inside the heat insulator 5, even if no additional heat insulation construction is performed on the outlet flow path 6, the heat dissipation of the circulated gas (cold air) flowing through the outlet flow path 6 can be suppressed. By suppressing the heat dissipation of the circulated gas flowing through the outlet flow path 6, the uneven temperature distribution of the circulated gas guided to the freezing space 20 via the blowout port 26 can be suppressed. And by suppressing the heat dissipation of the circulated gas in the outlet flow path 6, the circulated gas cooled in the chiller 3 can be effectively guided to the freezing space 20.

[0074] In some embodiments, as Figure 2 and Figure 3 shown, an inlet flow path 7 is formed inside the above-mentioned heat insulator 5. The inlet flow path 7 is used to connect the chiller accommodation space 40 and the freezing space 20, and guide the circulated gas sucked from the freezing space 20 via the suction port 27 to the chiller 3. The inlet flow path 7 constitutes a part of the above-mentioned suction gas pipeline 28A. One end of the inlet flow path 7 is formed with a suction port 27, and the other end of the inlet flow path 7 is formed with an inlet opening 71 connected to the chiller accommodation space 40. The above-mentioned suction gas pipeline 28A is formed inside the chiller housing 4 and the heat insulator 5. And the above-mentioned compressed gas pipeline 28B is formed inside the chiller housing 4.

[0075] According to the above structure, by forming the inlet flow path 7 inside the heat insulator 5, heat dissipation of the circulating gas flowing through the inlet flow path 7 can be suppressed. By suppressing the heat dissipation of the circulating gas flowing through the inlet flow path 7, the thermal energy of the circulating gas guided to the refrigerator 3 via the inlet flow path 7 can be effectively used as a heating source for the refrigerator 3 (heat exchanger 32).

[0076] (Shape of the outlet flow path)

[0077] Figures 6 - 8 are a schematic perspective view of the refrigerator housing 4 and the heat insulator 5 of the refrigerated container 1 according to an embodiment of the present invention. In some embodiments, as Figures 7 - 8 shown, the cross-sectional shape of the above-mentioned outlet flow path 6 is formed into a quadrilateral (rectangular or trapezoidal shape). The cross-section of the outlet flow path 6 represents a cross-section orthogonal to the flow direction of the circulating gas from the outlet opening 61 of the outlet flow path 6 toward the blow-out port 26. At this time, the manufacturability of the outlet flow path 6 is good, and the cross-sectional area (flow path area) can be increased compared with the case where the cross-sectional shape of the outlet flow path 6 is circular or elliptical. In addition, in some other embodiments, as Figure 6 shown, the cross-sectional shape of the outlet flow path 6 can also be formed into a circular or elliptical shape. Also, the opening shape of the outlet opening 61 can be a shape different from the opening shape of the outlet-side communication hole 47.

[0078] In some embodiments, as Figure 8 shown, the above-mentioned outlet flow path 6 includes a flow path area expansion portion 62 where the flow path area becomes larger toward the refrigerating space 20 side in at least a part. The flow path area expansion portion 62 preferably includes the blow-out port 26 formed at one end of the outlet flow path 6. When the blow-out port 26 has a length direction along the width direction of the container main body 2, the flow path area expansion portion 62 preferably has a flow path area that becomes larger along the width direction of the container main body 2 toward the refrigerating space 20 side. The flow path area expansion portion 62 can increase the cross-sectional area (flow path area) toward the refrigerating space 20 side in the length direction of the container main body 2, or can increase the cross-sectional area (flow path area) toward the downstream side in the flow direction of the circulating gas from the outlet opening 61 of the outlet flow path 6 toward the blow-out port 26 (refrigerating space 20 side). According to the above structure, by providing the flow path area expansion portion 62 in the outlet flow path 6, pressure loss in the outlet flow path 6 can be suppressed while ensuring the required opening area at the blow-out port 26.

[0079] In some embodiments, as Figure 8As shown, the flow path area expansion part 62 of the above-mentioned outlet flow path 6 is provided from the outlet opening 61 of the outlet flow path 6 connected to the refrigerator accommodation space 40 to the blowout port 26. According to the above structure, by providing the flow path area expansion part 62 from the outlet opening 61 of the outlet flow path 6 to the blowout port 26, the thickness of the heat insulating member 5 required to ensure the required opening area at the blowout port 26 becomes smaller. By setting the thickness of the heat insulating member 5 to the required minimum, the refrigerating space 20 can be expanded. And, according to the above structure, unnecessary bends or the like are not formed in the outlet flow path 6, so the pressure loss in the outlet flow path 6 can be reduced.

[0080] (Shape of the inlet flow path)

[0081] In some embodiments, as Figures 7 - 8 shown, the cross-sectional shape of the above-mentioned inlet flow path 7 is formed as a quadrilateral (rectangular or trapezoidal shape). The cross-section of the inlet flow path 7 represents the cross-section orthogonal to the flow direction of the circulating gas from the suction port 27 of the inlet flow path 7 toward the inlet opening 71. At this time, the manufacturability of the inlet flow path 7 is good, and compared with the case where the cross-sectional shape of the inlet flow path 7 is circular or elliptical, the cross-sectional area (flow path area) can be increased. In addition, in some other embodiments, as Figure 6 shown, the cross-sectional shape of the inlet flow path 7 may also be formed as a circular or elliptical shape. And, the opening shape of the inlet opening 71 may also be a shape different from the opening shape of the inlet side communication hole 48.

[0082] In some embodiments, as Figure 8 shown, the above-mentioned inlet flow path 7 includes a flow path area expansion part 72 in at least a part thereof, where the flow path area becomes larger toward the refrigerating space 20 side. The flow path area expansion part 72 preferably includes the suction port 27 formed at one end of the inlet flow path 7. When the suction port 27 has a length direction along the width direction of the container body 2, the flow path area expansion part 72 preferably has the flow path area becoming larger along the width direction of the container body 2 toward the refrigerating space 20 side. The flow path area expansion part 72 may make the cross-sectional area (flow path area) become larger along the length direction of the container body 2 toward the refrigerating space 20 side, or may make the cross-sectional area (flow path area) become larger toward the upstream side of the flow direction of the circulating gas from the suction port 27 (refrigerating space 20 side) of the inlet flow path 7 toward the inlet opening 71. According to the above structure, by providing the flow path area expansion part 72 in the inlet flow path 7, the pressure loss in the inlet flow path 7 can be suppressed while ensuring the required opening area at the suction port 27.

[0083] In some embodiments, as Figure 8As shown, the flow path area expansion part 72 of the above-mentioned inlet flow path 7 is provided from the inlet opening 71 of the inlet flow path 7 connected to the refrigerator accommodation space 40 to the suction port 27. According to the above structure, by providing the flow path area expansion part 72 from the inlet opening 71 of the inlet flow path 7 to the suction port 27, the thickness of the heat insulating member 5 required to ensure the required opening area at the suction port 27 becomes smaller. By setting the thickness of the heat insulating member 5 to the required minimum, the refrigerating space 20 can be expanded. And, according to the above structure, unnecessary bends or the like are not formed in the inlet flow path 7, so the pressure loss in the inlet flow path 7 can be reduced.

[0084] In some embodiments, as Figure 2 and Figure 3 shown, the above-mentioned suction port 27 is provided with a metal filter 15 for removing foreign matters. Figure 9 is a schematic diagram of the metal filter 15 in an embodiment of the present invention. The metal filter 15 has a plurality of holes or meshes, and has a plurality of openings formed by these holes or meshes or the like. The metal filter 15 preferably has a filtration particle size of 5 mm or less. In Figure 9 the embodiment shown, the metal filter 15 is formed with a plurality of openings by weaving a plurality of metal fibers 152 extending in a second direction orthogonal to the first direction on a plurality of metal fibers 151 extending in the first direction. The metal filter 15 can be installed on the surface 91 on the refrigerating space 20 side of the metal plate 9, or can be installed on the surface 51 on the refrigerating space 20 side of the heat insulating member 5. By the metal filter 15, it is possible to suppress foreign matters or moisture in the air from mixing into the inlet flow path 7.

[0085] (Specific examples of the refrigerator housing and the heat insulating member)

[0086] In some embodiments, as Figures 1 - 3 shown, the above-mentioned refrigerator housing 4 includes a back plate portion 42, a top plate portion 43, and a bottom plate portion 44. The back plate portion 42, the top plate portion 43, and the bottom plate portion 44 are each formed in a flat plate shape. The back plate portion 42 extends in a direction orthogonal to the length direction of the container body 2 on the refrigerating space 20 side in the length direction of the container body 2 more than the refrigerator 3.

[0087] The top plate portion 43 extends from the upper end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covers the upper part of the refrigerator 3. The outer wall surface of the top plate portion 43 faces the inner surface of the ceiling wall 21 with a gap therebetween. The bottom plate portion 44 extends from the lower end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covers the lower part of the refrigerator 3. The outer wall surface of the bottom plate portion 44 faces the inner surface (bottom surface 221) of the bottom wall 22 with a gap therebetween.

[0088] As Figure 1As shown, the above-mentioned refrigerator housing 4 may further include a pair of side plate portions 45 and 46. The pair of side plate portions 45 and 46 extend in a direction orthogonal to the width direction of the container body 2 and cover the sides of the refrigerator 3. The side plate portion 45 is connected to the end portions on one side in the width direction of the container body 2 of the back plate portion 42, the top plate portion 43, and the bottom plate portion 44 respectively. The outer wall surface of the side plate portion 45 faces the inner surface of the long side wall 23 with a gap therebetween. The side plate portion 46 is connected to the end portions on the other side in the width direction of the container body 2 of the back plate portion 42, the top plate portion 43, and the bottom plate portion 44 respectively. The outer wall surface of the side plate portion 46 faces the inner surface of the long side wall 24 with a gap therebetween.

[0089] In some embodiments, as Figures 1 - 3 shown, the above-mentioned heat insulator 5 includes a back side heat insulator 5A, an upper surface side heat insulator 5B, and a lower surface side heat insulator 5C. The back side heat insulator 5A is laminated on the surface (back surface 421) on the refrigerating space 20 side of the back plate portion 42. The upper surface side heat insulator 5B is laminated on the outer wall surface (upper surface) of the top plate portion 43. The upper surface side heat insulator 5B preferably abuts against the outer wall surface of the top plate portion 43 and the inner surface of the ceiling wall 21 respectively. The lower surface side heat insulator 5C is laminated on the outer wall surface (lower surface) of the bottom plate portion 44. The lower surface side heat insulator 5C preferably abuts against the outer wall surface of the bottom plate portion 44 and the inner surface of the bottom wall 22 respectively.

[0090] In the illustrated embodiment, the back side heat insulator 5A includes: an upper portion, which is located closer to the refrigerating space 20 side than the back surface 421 of the back plate portion 42 and is located above the outer wall surface of the top plate portion 43; and a lower portion, which is located closer to the refrigerating space 20 side than the back surface 421 of the back plate portion 42 and is located below the outer wall surface of the bottom plate portion 44. In some other embodiments, the upper surface side heat insulator 5B may include the above-mentioned upper portion, and the lower surface side heat insulator 5C may include the above-mentioned lower portion. The above-mentioned upper portion preferably abuts against the inner surface of the ceiling wall 21. The above-mentioned lower portion preferably abuts against the inner surface of the bottom wall 22.

[0091] As Figure 1 shown, the above-mentioned heat insulator 5 may further include a side surface side heat insulator 5D laminated on the outer wall surface of the side plate portion 45 and a side surface side heat insulator 5E laminated on the outer wall surface of the side plate portion 46. The side surface side heat insulators 5D and 5E preferably abut against the outer wall surfaces of the side plate portions 45 and 46 and the inner surfaces of the long side walls 23 and 24 facing the outer wall surfaces with a gap therebetween respectively. The back side heat insulator 5A, the upper surface side heat insulator 5B, the lower surface side heat insulator 5C, and the pair of side surface side heat insulators 5D and 5E may each be composed of a plurality of heat insulators.

[0092] According to the above structure, the heat insulating member 5 includes a back side heat insulating member 5A, an upper surface side heat insulating member 5B, and a lower surface side heat insulating member 5C, and thus heat input into the refrigerator accommodation space 40 or heat dissipation from the refrigerator accommodation space 40 can be suppressed. The heat insulating member 5 including the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C can set the shape of the outlet flow path 6 formed inside the heat insulating member 5 according to the positions of the outlet side communication holes 47 (47A, 47B) or the air outlet 26 to an appropriate shape. Also, the heat insulating member 5 including the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C can set the shape of the inlet flow path 7 formed inside the heat insulating member 5 according to the positions of the inlet side communication holes 48 (48A, 48B) or the suction port 27 to an appropriate shape. The heat insulating member 5 including the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C can be applied to container bodies 2 with different specification dimensions by changing the thicknesses of the respective parts 5A, 5B, 5C, 5D, 5E of the heat insulating member without changing the refrigerator 3 or the refrigerator housing 4.

[0093] In some embodiments, the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C of the heat insulating member 5 are formed separately.

[0094] According to the above structure, by forming the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C separately, each part 5A, 5B, 5C of the heat insulating member can be closely attached to the refrigerator housing 4, and thus leakage of fluid through the gap between the heat insulating member 5 and the refrigerator housing 4 can be effectively suppressed. Also, each part 5B, 5C of the heat insulating member can be closely attached to the inner surface of the container body 2, and thus leakage of fluid through the gap between the heat insulating member 5 and the container body 2 can be effectively suppressed. Also, by forming the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C separately, each damaged or severely deteriorated part 5A, 5B, 5C of the heat insulating member can be replaced individually, and thus the maintainability of the heat insulating member can be improved. Additionally, for the heat insulating member 5, a pair of side surface side heat insulating members 5D, 5E can also be formed separately from the back side heat insulating member 5A, the upper surface side heat insulating member 5B, and the lower surface side heat insulating member 5C.

[0095] In some embodiments, as Figure 2 shown, the above-mentioned outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet side communication hole 47A (47) formed in the above-mentioned back plate portion 42. In Figure 2 the embodiment shown, the air outlet 26 is formed below the outer wall surface of the bottom plate portion 44, and the outlet flow path 6 is formed in the back side heat insulating member 5A. The outlet flow path 6 forms a part including the air outlet 26 in the above-mentioned lower portion of the back side heat insulating member 5A.

[0096] According to the above structure, the outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet-side communication hole 47A formed in the back plate portion 42. At this time, the length of the pipe in the refrigerator accommodation space 40 for guiding the circulating gas from the refrigerator 3 to the outlet flow path 6 can be shortened, so that heat dissipation in this pipe can be suppressed. And when the length of this pipe is short, the heat insulation construction for this pipe becomes correspondingly easier. Also, according to the above structure, even when the thickness of the heat insulating member covering the lower part of the refrigerator housing 4 is relatively small, the outlet flow path 6 can be formed inside the heat insulating member.

[0097] In some embodiments, as Figure 2 shown, the above-mentioned inlet flow path 7 is connected to the refrigerator accommodation space 40 via the inlet-side communication hole 48A (48) formed in the back plate portion 42 above the outlet-side communication hole 47A (47). In Figure 2 the embodiment shown, when viewed from one side in the length direction of the container body 2, the suction port 27 is formed at a position overlapping the back plate portion 42, and the inlet flow path 7 is formed in the back-side heat insulating member 5A. The inlet flow path 7 is not formed in the upper part or the lower part of the back-side heat insulating member 5A.

[0098] According to the above structure, the inlet flow path 7 is connected to the refrigerator accommodation space 40 via the inlet-side communication hole 48A formed in the back plate portion 42 above the outlet-side communication hole 47A. At this time, the length of the pipe in the refrigerator accommodation space 40 for guiding the circulating gas from the inlet flow path 7 to the refrigerator 3 can be shortened, so that heat dissipation in this pipe can be suppressed. Also, according to the above structure, even when the thickness of the heat insulating member covering the upper part of the refrigerator housing 4 is relatively small, the inlet flow path 7 can be formed inside the heat insulating member.

[0099] In some embodiments, as Figure 3 shown, the above-mentioned outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet-side communication hole 47B (47) formed in the bottom plate portion 44. In Figure 3 the embodiment shown, the blow-out port 26 is formed below the outer wall surface of the bottom plate portion 44, and the outlet flow path 6 is formed in the lower part of the lower-surface-side heat insulating member 5C and the back-side heat insulating member 5A.

[0100] According to the above structure, the outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet-side communication hole 47B formed in the bottom plate portion 44. At this time, it is easy to arrange the blow-out port 26 on the lower side (bottom surface side) in the height direction of the container body 2. By increasing the difference between the blow-out port 26 and the suction port 27 in the height direction of the container body 2, uneven temperature distribution in the height direction of the container body 2 in the refrigerating space 20 can be effectively suppressed.

[0101] In some embodiments, as Figure 3 shown, the above-mentioned inlet flow path 7 is connected to the refrigerator accommodation space 40 via an inlet-side communication hole 48B (48) formed in the top plate portion 43. In Figure 3 the embodiment shown, the suction port 27 is formed above the outer wall surface of the top plate portion 43, and the inlet flow path 7 is formed in the upper portions of the upper surface-side heat insulating member 5B and the back surface-side heat insulating member 5A.

[0102] According to the above structure, the inlet flow path 7 is connected to the refrigerator accommodation space 40 via the inlet-side communication hole 48B formed in the top plate portion 43. At this time, it is easy to dispose the suction port 27 on the upper side (ceiling surface side) in the height direction of the container main body 2.

[0103] When viewed from one side in the length direction of the container main body 2, by making the outlet flow path 6 and the inlet flow path 7 not overlap with the back plate portion 42, the thickness of the back surface-side heat insulating member 5A can be reduced.

[0104] (Laying member)

[0105] Figure 10 is a schematic cross-sectional view showing a laying member 8 laid on the refrigerated container 1 according to an embodiment of the present invention along a direction orthogonal to the length direction of the container main body 2. In some embodiments, as Figure 2 and Figure 3 shown, the above-mentioned refrigerated container 1 further includes at least one laying member 8, and the at least one laying member 8 is laid on the bottom surface (bottom surface 221 of the bottom wall 22) of the refrigerating space 20 of the container main body 2. In the illustrated embodiment, the at least one laying member 8 includes a plurality of guide rail members 8, and the plurality of guide rail members 8 are arranged along the width direction of the container main body 2 and extend along the length direction of the container main body 2 and the cross-sectional shape is formed in a T shape. A gas flow path 80 for gas flow is formed below the upper surface of the at least one laying member 8 (the plurality of guide rail members 8). In the illustrated embodiment, a gas flow path 80 having a length direction along the length direction of the container main body 2 is formed by two adjacent guide rail members 8, 8 and the bottom surface 221 of the bottom wall 22. The above-mentioned air outlet 26 is configured to communicate with the gas flow path 80. Specifically, when viewed from one side in the length direction of the container main body 2, the air outlet 26 is formed at a height position where at least a part thereof overlaps with the gas flow path 80.

[0106] According to the above structure, the circulating gas (cold air) guided to the gas flow path 80 through the air outlet 26 flows above the upper surface of the laying member 8 after flowing through the gas flow path 80. At this time, the circulating gas (cold air) guided to the refrigerating space 20 through the air outlet 26 can be guided to a wide range of the refrigerating space 20. Therefore, even if goods to be cooled are placed on the upper surface of the laying member 8, the entire refrigerating space 20 can be effectively cooled.

[0107] (Shape of air outlet and suction inlet)

[0108] Figures 11 - 13 These are explanatory views of the air outlet 26 and the suction inlet 27 of the refrigerated container 1 according to an embodiment of the present invention. Figures 11 - 13 The heat insulating member 5 is shown as viewed from the refrigerating space 20 in the longitudinal direction of the refrigerated container 1.

[0109] In some embodiments, as Figures 11 - 13 shown, the above air outlet 26 includes a first opening portion 261 having a longitudinal direction along the width direction of the container body 2, and the above suction inlet 27 includes a second opening portion 271 having a longitudinal direction along the width direction of the container body 2. The air outlet 26 is formed by a pair of side portions 261A and 261B that extend along the width direction of the container body 2 and are opposed to each other in the height direction of the container body 2 and constitute a part of its shape. The suction inlet 27 is formed by a pair of side portions 271A and 271B that extend along the width direction of the container body 2 and are opposed to each other in the height direction of the container body 2 and constitute a part of its shape. In Figure 11 the embodiment shown, the air outlet 26 and the suction inlet 27 are formed as rectangles having a longitudinal direction along the width direction of the container body 2.

[0110] According to the above structure, the air outlet 26 including the first opening portion 261 can introduce the circulating gas into a relatively wide range in the width direction of the refrigerating space 20. The suction inlet 27 including the second opening portion 271 can suck the in-store gas from a relatively wide range in the width direction of the refrigerating space 20. Thereby, uneven temperature distribution in the above width direction of the refrigerating space 20 can be effectively suppressed.

[0111] In some embodiments, as Figure 12 and Figure 13As shown, the above-mentioned air outlet 26 further includes a first upper opening 262 having a longitudinal direction upward from one end of the first opening 261 in the width direction. The above-mentioned suction port 27 includes a first lower opening 272 having a longitudinal direction downward from the other end of the second opening 271 in the width direction. The air outlet 26 is formed by a pair of side portions 262A and 262B that extend upward along the height direction of the container body 2 from one end of the pair of side portions 261A and 261B and are opposed to each other with a space therebetween in the width direction of the container body 2, and forms a part of its shape. The suction port 27 is formed by a pair of side portions 272A and 272B that extend downward along the height direction of the container body 2 from one end of the pair of side portions 271A and 271B and are opposed to each other with a space therebetween in the width direction of the container body 2, and forms a part of its shape.

[0112] According to the above structure, the air outlet 26 including the first upper opening 262 can introduce the circulating gas into a relatively wide range in the height direction of the freezing space 20. The suction port 27 including the first lower opening 272 can suck the gas in the storage chamber from a relatively wide range in the height direction of the freezing space 20. Thereby, it is possible to effectively suppress the uneven temperature distribution in the above-mentioned height direction of the freezing space 20.

[0113] In some embodiments, as Figure 13 shown, the above-mentioned air outlet 26 includes the above-mentioned first opening 261, the above-mentioned first upper opening 262 and a second upper opening 263, and the second upper opening 263 has a longitudinal direction upward from the other end of the first opening 261 in the width direction. The above-mentioned suction port 27 includes the above-mentioned second opening 271, the above-mentioned first lower opening 272 and a second lower opening 273, and the second lower opening 273 has a longitudinal direction downward from the one end of the second opening 271 in the width direction.

[0114] The air outlet 26 is formed by a pair of side portions 263A and 263B that extend upward along the height direction of the container body 2 from the other end of the pair of side portions 261A and 261B and are opposed to each other with a space therebetween in the width direction of the container body 2, and forms a part of its shape. The suction port 27 is formed by a pair of side portions 273A and 273B that extend downward along the height direction of the container body 2 from the other end of the pair of side portions 271A and 271B and are opposed to each other with a space therebetween in the width direction of the container body 2, and forms a part of its shape.

[0115] According to the above structure, the air outlet 26 including the second upper opening 263 can introduce the circulating gas into a relatively wide range in the height direction of the refrigerating space 20. The suction port 27 including the second lower opening 273 can suck the in-store gas from a relatively wide range in the height direction of the refrigerating space 20. Thereby, it is possible to effectively suppress the uneven temperature distribution in the above height direction of the refrigerating space 20.

[0116] (Material of the heat insulating member)

[0117] In some embodiments, the heat insulating member 5 is made of a heat insulating member such as urethane or Phenova Board with a thermal conductivity of 0.03 W / (m·K) or less. By using a relatively hard heat insulating member such as urethane or Phenova Board as the material of the heat insulating member 5, compared with a soft heat insulating member such as glass wool, it is easier to construct the outlet flow path 6 or the inlet flow path 7 in the heat insulating member 5, and deformation of the heat insulating member 5 during the use of the refrigerated container 1 can be suppressed.

[0118] (Metal plate)

[0119] Figure 14 It is an explanatory view of the metal plate 9, the hydrophobic layer 10A and the waterproof layer 10B of the refrigerated container 1 according to an embodiment of the present invention. In some embodiments, as Figure 2 , Figure 3 and Figure 14 shown, the refrigerated container 1 includes a metal plate 9 laminated on the surface 51 on the refrigerating space 20 side of the heat insulating member 5.

[0120] According to the above structure, the metal plate 9 can be used to prevent the heat insulating member 5 from being damaged or deteriorated due to the collision of goods during unloading operations or in-store cleaning, etc., resulting in a decline in function. Therefore, the heat insulating performance of the heat insulating member 5 can be maintained for a relatively long time. By using a metal with a heat capacity smaller than that of the heat insulating member 5 for the metal plate 9, the time required to cool the refrigerating space 20 can be shortened.

[0121] (Hydrophobic layer, waterproof layer)

[0122] In some embodiments, as Figure 14 shown, the refrigerated container 1 further includes a hydrophobic layer 10A or a waterproof layer 10B formed between the heat insulating member 5 and the metal plate 9. As the hydrophobic layer 10A, for example, a hydrophobic coating composed of a coating agent suitable for low temperature such as silicon or fluorine can be cited. As the waterproof layer 10B, for example, a waterproof film can be cited.

[0123] According to the above structure, the hydrophobic layer 10A or the waterproof layer 10B can be used to prevent the heat insulating member 5 from being wetted due to in-container cleaning or the like, resulting in a decline in function. Therefore, the heat insulating performance of the heat insulating member 5 can be maintained for a relatively long time. In addition, a part of the surface 51 of the heat insulating member 5 may not be laminated with the metal plate 9, the hydrophobic layer 10A, or the waterproof layer 10B.

[0124] (Outlet flow path side metal plate)

[0125] Figure 15 It is an explanatory diagram for explaining the outlet flow path side metal plate 11, the outlet flow path side hydrophobic layer 12A, and the outlet flow path side waterproof layer 12B of the refrigerated container 1 according to an embodiment of the present invention. In some embodiments, as Figure 15 shown, the above-mentioned refrigerated container 1 further includes an outlet flow path side metal plate 11 laminated on the inner surface 60 of the outlet flow path 6.

[0126] According to the above structure, the outlet flow path side metal plate 11 laminated on the inner surface 60 of the outlet flow path 6 becomes a reinforcing member, thereby improving the strength of the heat insulating member 5. And the inner surface 60 of the outlet flow path 6 can be prevented from being damaged or deteriorated by using the outlet flow path side metal plate 11.

[0127] (Outlet flow path side hydrophobic layer, outlet flow path side waterproof layer)

[0128] In some embodiments, as Figure 15 shown, the above-mentioned refrigerated container 1 further includes an outlet flow path side hydrophobic layer 12A or an outlet flow path side waterproof layer 12B formed between the inner surface 60 of the above-mentioned outlet flow path 6 and the outlet flow path side metal plate 11. As the outlet flow path side hydrophobic layer 12A, for example, a hydrophobic coating composed of a coating agent suitable for low temperature such as silicon or fluorine can be cited. As the outlet flow path side waterproof layer 12B, for example, a waterproof film can be cited.

[0129] According to the above structure, the outlet flow path side hydrophobic layer 12A or the outlet flow path side waterproof layer 12B can be used to prevent the condensed water from invading the heat insulating member 5 through the outlet flow path 6, resulting in a decline in the heat insulating performance of the heat insulating member 5. In addition, a part of the inner surface 60 of the outlet flow path 6 may not be laminated with the outlet flow path side metal plate 11, the outlet flow path side hydrophobic layer 12A, or the outlet flow path side waterproof layer 12B.

[0130] (Inlet flow path side metal plate)

[0131] Figure 16 It is an explanatory diagram for explaining the inlet flow path side metal plate 13, the inlet flow path side hydrophobic layer 14A, and the inlet flow path side waterproof layer 14B of the refrigerated container 1 according to an embodiment of the present invention. In some embodiments, as Figure 16As shown, the above-described refrigerated container 1 further includes an inlet flow path side metal plate 13 laminated on the inner surface 70 of the inlet flow path 7.

[0132] According to the above structure, the inlet flow path side metal plate 13 laminated on the inner surface 70 of the inlet flow path 7 serves as a reinforcing member, thereby enabling the strength of the heat insulating member 5 to be improved. In addition, the inner surface 70 of the inlet flow path 7 can be prevented from being damaged or deteriorated by the inlet flow path side metal plate 13.

[0133] (Inlet flow path side hydrophobic layer, inlet flow path side waterproof layer)

[0134] In some embodiments, as Figure 16 shown, the above-described refrigerated container 1 further includes an inlet flow path side hydrophobic layer 14A or an inlet flow path side waterproof layer 14B formed between the inner surface 70 of the inlet flow path 7 and the inlet flow path side metal plate 13. As the inlet flow path side hydrophobic layer 14A, for example, a hydrophobic coating composed of a coating agent suitable for low temperatures such as silicon or fluorine can be cited. As the inlet flow path side waterproof layer 14B, for example, a waterproof film can be cited.

[0135] According to the above structure, the condensation water can be prevented from invading the heat insulating member 5 through the inlet flow path 7 and causing a decrease in the heat insulating performance of the heat insulating member 5 by the inlet flow path side hydrophobic layer 14A or the inlet flow path side waterproof layer 14B. In addition, there may be a portion of the inner surface 70 of the inlet flow path 7 where the inlet flow path side metal plate 13 or the inlet flow path side hydrophobic layer 14A and the inlet flow path side waterproof layer 14B are not laminated.

[0136] <Refrigerated container according to another embodiment>

[0137] The refrigerated container 1 according to another embodiment will be described. Figure 17 is a schematic cross-sectional view along the longitudinal direction of the container body 2 of the refrigerated container 1 according to another embodiment. In another embodiment, the same reference numerals are assigned to the same constituent elements as those in the above-described configuration, and their detailed descriptions are omitted. Hereinafter, the longitudinal direction of the container body 2 will be referred to as the "longitudinal direction D1", the width direction of the container body 2 will be referred to as the "width direction D2", and the height direction of the container body 2 will be referred to as the "height direction D3".

[0138] (Outlet flow path)

[0139] The structure of the outlet flow path 6 according to another embodiment will be described. As Figure 17 shown, in another embodiment, the outlet flow path 6 is formed with an air outlet 26 at one end, and the air outlet 26 is configured to communicate with the gas flow path 80. The outlet flow path 6 is formed with an outlet opening 61 at the other end, and the outlet opening 61 is configured to communicate with an outlet side communication hole 47 formed in the bottom plate portion 44.

[0140] Figure 18 This is a diagram for explaining the peripheral structure of the outlet flow path 6 involved in another embodiment. In Figure 18 the illustrated manner, at least a part 6a1 of the upper surface 6a of the outlet flow path 6 abuts against the upper surface 8a of the laying member 8. Specifically, the lower surface 5Aa of the back-side heat insulator 5A faces the outlet flow path 6 from above and constitutes the upper surface 6a of the outlet flow path 6. The lower surface 5Aa of the back-side heat insulator 5A slopes downward as it faces the other side (freezing space 20 side) in the longitudinal direction D1. That is, the upper surface 6a of the outlet flow path 6 includes an upper surface inclined portion 6a2 that slopes downward as it faces the freezing space 20 side. The end portion 5Ab on the other side (freezing space 20 side) in the longitudinal direction D1 of the lower surface 5Aa of the back-side heat insulator 5A abuts against the upper surface 8a of the laying member 8. The end portion 5Ab of the lower surface 5Aa of the back-side heat insulator 5A is located on the other side in the longitudinal direction D1, which is closer to the other side in the longitudinal direction D1 than one end (the inlet of the gas flow path 80) on one side of the laying member 8 in the longitudinal direction D1.

[0141] In Figure 18 the illustrated manner, the lower surface 6b of the outlet flow path 6 includes a lower surface inclined portion 6b1 that slopes downward as it faces the freezing space 20 side. Specifically, the lower part of the side surface 5Ca on the other side in the longitudinal direction D1 of the lower-surface side heat insulator 5C faces the outlet flow path 6 from below and constitutes the lower surface 6b of the outlet flow path 6. Further, the lower part of the side surface 5Ca of the lower-surface side heat insulator 5C slopes downward as the lower surface inclined portion 6b1 as it faces the freezing space 20 side.

[0142] In Figure 18 the illustrated manner, the front end 6b2 on the other side in the longitudinal direction D1 of the lower surface inclined portion 6b1 is spaced apart from the laying member 8. Specifically, if the height of the laying member 8 is set as h and the distance between the laying member 8 and the front end 6b2 of the lower surface inclined portion 6b1 is set as d, then h / 2 ≤ d ≤ 2h. Therefore, a part of the bottom surface 221 of the bottom wall 22 faces the outlet flow path 6 (in other words, is exposed to the outlet flow path 6). A part of the bottom surface 221 of the bottom wall 22 and the lower surface inclined portion 6b1 together constitute the lower surface 6b of the outlet flow path 6.

[0143] In Figure 18 the illustrated manner, the lower-surface side heat insulator 5C includes a first heat-insulating block BL1 and is disposed above the first heat-insulating block BL1 ( Figure 18the second heat insulating block BL2 that is located above the dot line). The first heat insulating block BL1 has a first outlet flow path portion 6A formed therein. The second heat insulating block BL2 has a second outlet flow path portion 6B formed therein. The outlet flow path 6 includes the first outlet flow path portion 6A and the second outlet flow path portion 6B. Therefore, by arranging the first heat insulating block BL1, the refrigerator 3, and the second heat insulating block BL2 in sequence, the constructability can be improved. In Figure 18 In the example shown in, the outlet flow path 6 includes, in addition to the first outlet flow path portion 6A and the second outlet flow path portion 6B, a third outlet flow path portion 6C formed between a lower surface 5Aa of the rear side heat insulating member 5A and a part of the bottom surface 221 of the bottom wall 22. In addition, the lower surface side heat insulating member 5C may be constituted only by the first heat insulating block BL1, and the rear side heat insulating member 5A may be constituted only by the second heat insulating block BL2.

[0144] Figure 19 is a schematic cross-sectional view of the laying member 8 along the width direction D2 according to another embodiment. In another embodiment, as Figure 19 shown in the example, the laying member 8 is a rail member 8 formed in a T shape. A plurality of rail members 8 are laid on the bottom surface 221 of the bottom wall 22. As described above, the plurality of rail members 8 extend along the length direction D1. The plurality of rail members 8 are arranged at intervals of 83 along the width direction D2.

[0145] The function / effect of the outlet flow path 6 according to another embodiment will be described. According to another embodiment, as Figure 17 shown in the example, the outlet flow path 6 is formed by the first outlet flow path portion 6A, the second outlet flow path portion 6B, and the third outlet flow path portion 6C, so that it is not necessary to pass through the inside of the back plate portion 42 to form. Therefore, compared with Figure 2 the example shown in or Figure 3 the example shown in, the thickness (length in the length direction D1) of the back plate portion 42 can be reduced, thereby expanding the refrigerating space 20.

[0146] According to another embodiment, an end portion 5Ab of the lower surface 5Aa of the rear side heat insulating member 5A (at least a part 6a1 of the upper surface 6a of the outlet flow path 6) abuts against the upper surface 8a of the rail member 8, so that it is possible to prevent the gas from being blown out from the outlet flow path 6 into the refrigerating space 20 without passing through the gas flow path 80. Specifically, it is possible to prevent the circulating gas flowing in the third outlet flow path portion 6C from being blown out into the refrigerating space 20.

[0147] According to another embodiment, a part of the bottom surface 221 of the bottom wall 22 faces the outlet flow path 6, so that the ice formed due to the freezing of the moisture contained in the circulating air can accumulate on a part of the bottom surface 221, thereby preventing the blockage of the air outlet 26. Further, according to another embodiment, asFigure 19 As illustrated in the middle example, a plurality of rail members 8 are arranged with a gap 83 therebetween. Therefore, even if ice accumulates on a part of the bottom surface 221 in a manner that blocks the air outlet 26 of the outlet flow path 6, the circulating gas can flow into the gas flow path 80 from the gap 83.

[0148] According to another embodiment, the lower part of the side surface 5Ca of the lower surface side heat insulator 5C slopes downward as it faces the freezing space 20 side. Therefore, the circulating air flows in the outlet flow path 6 in a manner that approaches along the direction (length direction D1) in which the gas flow path 80 extends. Therefore, the circulating air can smoothly flow from the outlet flow path 6 into the gas flow path 80.

[0149] According to another embodiment, a first outlet flow path portion 6A is formed inside one first heat insulator block BL1, and a second outlet flow path portion 6B is formed inside one second heat insulator block BL2. Therefore, compared with the case of combining a plurality of first heat insulator blocks BL1 to form the first outlet flow path portion 6A, the number of first heat insulator blocks BL1 required to form the first outlet flow path portion 6A can be reduced. And compared with the case of combining a plurality of first heat insulator blocks BL1, the manufacturing error of the first outlet flow path portion 6A can be reduced, thereby improving the heat insulation property. In addition, the second heat insulator block BL2 can also play the same role / effect.

[0150] (Inlet flow path)

[0151] The structure of the inlet flow path 7 according to another embodiment will be described. As Figure 17 shown, in another embodiment, the refrigerated container 1 further includes an inlet flow path forming portion 90 provided on the back surface 421 of the back plate portion 42. The inlet flow path forming portion 90 forms an inlet flow path 7 that is used to connect the refrigerator accommodation space 40 and the freezing space 20 and guide the circulating gas sucked from the freezing space 20 through the suction port 27 to the refrigerator 3. The inlet flow path forming portion 90 can be formed of the heat insulator 5 or a material other than the heat insulator 5. In another embodiment, the inlet flow path forming portion 90 is formed of a material different from the heat insulator 5 and is disposed above the back surface side heat insulator 5A. The inlet flow path forming portion 90 is clamped by the upper surface side heat insulator 5B and the back surface side heat insulator 5A in the height direction D3.

[0152] Figure 20 is a schematic diagram showing the structure of the inlet flow path forming portion 90 according to another embodiment and is a view of the inlet flow path forming portion 90 observed from the other side in the length direction D1. Figure 21 is a schematic diagram showing the structure of the inlet flow path forming portion 90 according to another embodiment and is a view of the inlet flow path forming portion 90 observed from one side in the width direction D2.

[0153] In Figure 20 the manner illustrated in, the suction port 27 has a longitudinal direction along the width direction D2. The area of the inlet opening 71 is smaller than the area of the suction port 27. The inlet opening 71 is arranged on the other side in the width direction D2 of the suction port 27 when viewed from the longitudinal direction D1, and is surrounded by the suction port 27. Therefore, as shown by the arrow in Figure 20 , the circulating gas sucked from one side in the width direction D2 of the suction port 27 flows to the other side in the width direction D2. At this time, the circulating air collides with a trapping plate 92 described later.

[0154] In Figure 20 the manner illustrated in, a suction port filter 89 is provided on the entire surface of the suction port 27. An inlet opening filter 93 having a smaller mesh opening than the suction port filter 89 is provided on the entire surface of the inlet opening 71. In addition, in Figure 20 and Figure 21 , the magnitudes of the mesh openings are illustrated in shades, and the darker the shade, the smaller the size.

[0155] The suction port filter 89 sets the mesh opening according to the area of the suction port 27. Specifically, as the area of the suction port 27 increases, the flow velocity of the circulating gas flowing into the inlet flow path forming portion 90 becomes slower, so the suction port filter 89 is set to reduce the mesh opening.

[0156] In Figure 20 the manner illustrated in, the refrigerated container 1 further includes at least one trapping plate 92, and the at least one trapping plate 92 is provided in the inlet flow path 7 to block a part of the cross section cut along the height direction D3 of the inlet flow path 7. The at least one trapping plate 92 has a first trapping plate 92A (92) protruding upward from the lower surface 7a of the inlet flow path 7 and a second trapping plate 92B (92) protruding downward from the upper surface 7b of the inlet flow path 7. The first trapping plate 92A and the second trapping plate 92B are arranged side by side along the width direction D2. A plurality of first trapping plates 92A and a plurality of second trapping plates 92B are alternately arranged along the width direction D2.

[0157] As Figure 21 shown, the inlet flow path 7 communicates with the refrigerator accommodation space 40 via an inlet side communication hole 48 formed in the back plate portion 42. The inlet side communication hole 48 is located above the lower surface 7a of the inlet flow path 7. That is, the inlet opening 71 is located above the lower surface 7a of the inlet flow path 7. And, an inlet 95 of a drain hole 94 communicating with the refrigerating space 20 is formed in the lower surface 7a of the inlet flow path 7. In Figure 21 the manner illustrated in, the drain hole 94 penetrates through the inlet flow path forming portion 90 and the back side heat insulating member 5A. The outlet of the drain hole 94 is formed on the surface 51 of the back side heat insulating member 5A.

[0158] In Figure 21 In the manner exemplified in Figure 21 , the inlet flow path forming portion 90 includes a suction surface 96 formed with a suction port 27. The suction surface 96 is inclined so as to approach the refrigerating space 20 as it goes upward. Specifically, if the smaller angle among the angles formed by the dotted line X extending in the vertical direction and the suction surface 96 is set as θ, then 0° ≤ θ ≤ 45°.

[0159] The function / effect of the inlet flow path 7 according to another embodiment will be described. According to another embodiment, an inlet 95 of a drain hole 94 is formed in the lower surface 7a of the inlet flow path 7. Therefore, even if droplets are generated in the inlet flow path 7 (for example, even if the ice formed during the cooling operation becomes droplets), the droplets can be discharged from the inlet flow path 7 into the refrigerating space 20.

[0160] According to another embodiment, a trapping plate 92 is provided in the inlet flow path 7. Therefore, by causing foreign matters flowing in the inlet flow path 7 together with the circulating gas to collide with the trapping plate 92, the intrusion of the foreign matters into the refrigerator 3 can be suppressed. Further, according to another embodiment, a plurality of first trapping plates 92A and a plurality of second trapping plates 92B are alternately arranged in the inlet flow path 7 along the width direction D2. Therefore, by causing the foreign matters to collide with the first trapping plate 92A or the second trapping plate 92B, the intrusion of the foreign matters into the refrigerator 3 can be further suppressed.

[0161] According to another embodiment, a suction port filter 89 is provided at the suction port 27, and an inlet opening filter 93 is provided at the inlet opening 71. Therefore, by removing relatively large foreign matters with the suction port filter 89 and removing relatively small foreign matters with the inlet opening filter 93, the pressure loss of the circulating gas guided to the refrigerator 3 can be reduced while suppressing the intrusion of foreign matters. According to another embodiment, the suction surface 96 is inclined, so that the droplets or foreign matters falling from the suction port filter 89 can be prevented from intruding into the inlet flow path 7. According to another embodiment, the suction port filter 89 is set such that if the area of the suction port 27 increases, the mesh opening degree decreases. Therefore, the intrusion of droplets or foreign matters into the inlet flow path 7 can be suppressed. According to another embodiment, the suction port filter 89 has a length direction along the width direction D2. Therefore, even if icing occurs in a part, the remaining part can maintain an opening area of a certain level or more. Therefore, the circulating gas can flow into the inlet flow path forming portion 90 at a low speed, thereby reducing the pressure loss of the circulating gas.

[0162] Figure 22 It is a schematic view (observed from the side) showing the structure of the inlet flow path forming portion 90 according to a modification of another embodiment, and is a view of observing the inlet flow path forming portion 90 from one side in the width direction D2. In Figure 22In the method exemplified, the mesh opening of the suction port filter 89 is 1.0 mm or less. At this time, the inlet opening 71 of the inlet flow path 7 is not provided with an inlet opening filter 93. With this configuration, there is no need to provide an inlet opening filter 93, so the manufacturing cost and pressure loss can be reduced.

[0163] (opposite surface heat insulating member)

[0164] The structure of the opposite surface heat insulating member 98 according to another embodiment will be described. As Figure 17 shown, in another embodiment, the refrigerated container 1 further includes two opposite surface heat insulating members 98, and the two opposite surface heat insulating members 98 are laminated on a portion 97 of the surface on the side of the refrigerator accommodation space 40 of the back plate portion 42, which is the opposite side of the back surface 421 of the back plate portion 42 facing the inlet flow path forming portion 90 ( Figure 17 in, only one opposite surface heat insulating member 98 is shown). Figure 23 is a view for explaining the arrangement of the two opposite surface heat insulating members 98 according to another embodiment. As Figure 23 exemplified, when viewed from the longitudinal direction D1, the two opposite surface heat insulating members 98 are arranged along the width direction D2.

[0165] When viewed from the longitudinal direction D1, one opposite surface heat insulating member 98A (98) covers the entire inlet side communication hole 48. The other opposite surface heat insulating member 98B (98) is located on the other side in the width direction D2 relative to the one opposite surface heat insulating member 98A. When viewed from the longitudinal direction D1, the other opposite surface heat insulating member 98B covers the entire heat exchanger 32.

[0166] In the height direction D3, the lower end portion 99A of one opposite surface heat insulating member 98A overlaps with the upper end portion 99C of the back surface side heat insulating member 5A. Similarly, in the height direction D3, the lower end portion 99B of the other opposite surface heat insulating member 98B overlaps with the upper end portion 99C of the back surface side heat insulating member 5A.

[0167] The function / effect of the opposite surface heat insulating member 98 according to another embodiment will be described. According to another embodiment, by providing two opposite surface heat insulating members 98 on the portion 97 of the opposite surface 422 of the back plate portion 42, the heat insulation of the refrigerator 3 can be improved. Further, by separating one opposite surface heat insulating member 98A from the other opposite surface heat insulating member 98B that covers the entire heat exchanger 32, a decrease in the heat insulation of the other opposite surface heat insulating member 98B can be suppressed.

[0168] According to another embodiment, the refrigerator 3 is covered by the back surface side heat insulating member 5A, one opposite surface heat insulating member 98A, and the other opposite surface heat insulating member 98B in the height direction D3. Therefore, the heat insulation of the refrigerator 3 can be improved.

[0169] In this specification, expressions indicating relative or absolute configurations, such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", or "coaxial", not only represent such configurations in a strict sense, but also represent a state of relative displacement in such a manner that there are tolerances or angular or distance differences to an extent where the same function can be obtained.

[0170] For example, expressions indicating that things are in the same state, such as "same", "equal", and "homogeneous", not only represent the same state in a strict sense, but also represent a state where there are tolerances or differences to an extent where the same function can be obtained.

[0171] Moreover, in this specification, expressions indicating shapes, such as a quadrilateral or a cylindrical shape, not only represent such shapes in a strictly geometric sense, but also represent shapes including concavo-convex portions or chamfered portions within a range where the same effect can be obtained.

[0172] Furthermore, in this specification, expressions such as "comprising", "including", or "having" a constituent element are not exclusive expressions that exclude the existence of other constituent elements.

[0173] The present invention is not limited to the above-described embodiments, and also includes modified forms of the above-described embodiments or forms obtained by appropriately combining these forms.

[0174] The content described in some of the above embodiments can be understood as follows, for example.

[0175] 1) The refrigerated container 1 according to at least one embodiment of the present invention includes:

[0176] A container main body 2 having a refrigerated space 20 to be cooled inside;

[0177] A refrigerator 3 configured to be able to cool the circulating gas sucked from the refrigerated space 20;

[0178] A refrigerator housing 4 disposed inside the container main body 2 and having a refrigerator accommodation space 40 for accommodating the refrigerator 3 inside; and

[0179] A heat insulating member 5 laminated on an outer wall surface 41 of the refrigerator housing 4,

[0180] An outlet flow path 6 is formed inside the heat insulating member 5. The outlet flow path 6 is used to connect the refrigerator accommodation space 40 and the refrigerated space 20, and guides the circulating gas cooled in the refrigerator 3 to the refrigerated space 20 via a blowout port 26.

[0181] According to the structure of 1) above, by disposing the heat insulating member 5 between the refrigerator housing 4 and the refrigerating space 20, and arranging the refrigerator 3 that may become a heat source inside the refrigerator housing 4, the heat insulating performance of the refrigerating space 20 can be relatively improved. When the heat insulating performance of the refrigerating space 20 is high, the thickness of the heat insulating member installed on the inner surface of the container main body 2 can be correspondingly reduced, so that the storage space in the refrigerated container 1, that is, the refrigerating space 20, can be expanded.

[0182] Moreover, according to the structure of 1) above, by forming the outlet flow path 6 inside the heat insulating member 5, even if no separate heat insulation construction is performed on the outlet flow path 6, the heat dissipation of the circulating gas (cold air) flowing through the outlet flow path 6 can be suppressed. By suppressing the heat dissipation of the circulating gas flowing through the outlet flow path 6, the uneven temperature distribution of the circulating gas guided to the refrigerating space 20 via the air outlet 26 can be suppressed. Also, by suppressing the heat dissipation of the circulating gas in the outlet flow path 6, the circulating gas cooled in the refrigerator 3 can be effectively guided to the refrigerating space 20.

[0183] 2) In some embodiments, for the refrigerated container 1 described in 1) above,

[0184] An inlet flow path 7 is formed inside the heat insulating member 5. The inlet flow path 7 is used to connect the refrigerator accommodation space 40 and the refrigerating space 20, and guide the circulating gas sucked from the refrigerating space 20 via the suction port 27 to the refrigerator 3.

[0185] According to the structure of 2) above, by forming the inlet flow path 7 inside the heat insulating member 5, the heat dissipation of the circulating gas flowing through the inlet flow path 7 can be suppressed. By suppressing the heat dissipation of the circulating gas flowing through the inlet flow path 7, the thermal energy of the circulating gas guided to the refrigerator 3 via the inlet flow path 7 can be effectively used as the heating source of the refrigerator 3.

[0186] 3) In some embodiments, for the refrigerated container 1 described in 1) or 2) above,

[0187] At least a part of the outlet flow path 6 includes a flow path area expansion portion 62 where the flow path area becomes larger toward the refrigerating space 20 side.

[0188] According to the structure of 3) above, by providing the flow path area expansion portion 62 in the outlet flow path 6, the pressure loss in the outlet flow path 6 can be suppressed while ensuring the required opening area at the air outlet 26.

[0189] 4) In some embodiments, for the refrigerated container 1 described in 3) above,

[0190] The flow path area expansion portion 62 of the outlet flow path 6 is provided from the outlet opening 61 of the outlet flow path 6 connected to the refrigerator accommodation space 40 to the blowout port 26.

[0191] According to the structure of the above 4), by providing the flow path area expansion portion 62 from the outlet opening 61 of the outlet flow path 6 to the blowout port 26, the thickness of the heat insulating member 5 required for ensuring the required opening area at the blowout port 26 becomes smaller. By setting the thickness of the heat insulating member 5 to the required minimum, the refrigerating space 20 can be expanded. And, according to the structure of the above 4), unnecessary bends or the like are not formed in the outlet flow path 6, so that the pressure loss in the outlet flow path 6 can be reduced.

[0192] 5) In some embodiments, the refrigerated container 1 according to any one of the above 1) to 4), wherein,

[0193] The refrigerator housing 4 includes:

[0194] A back plate portion 42 extending in a direction orthogonal to the length direction of the container body 2 on the side closer to the refrigerating space 20 than the refrigerator 3;

[0195] A top plate portion 43 extending from the upper end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covering the upper side of the refrigerator 3; and

[0196] A bottom plate portion 44 extending from the lower end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covering the lower side of the refrigerator 3,

[0197] The outlet flow path 6 is connected to the refrigerator accommodation space 40 via an outlet side communication hole 47A formed in the back plate portion 42.

[0198] According to the structure of the above 5), the outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet side communication hole 47A formed in the back plate portion 42. At this time, the length of the pipe in the refrigerator accommodation space 40 for guiding the circulating gas from the refrigerator 3 to the outlet flow path 6 can be shortened, so that heat dissipation in the pipe can be suppressed. And, when the length of the pipe is short, the heat insulation construction for the pipe becomes correspondingly easy. And, according to the structure of the above 5), even when the thickness of the heat insulating member covering the lower side of the refrigerator housing 4 is relatively small, the outlet flow path 6 can be formed inside the heat insulating member.

[0199] 6) In some embodiments, the refrigerated container 1 according to the above 5), wherein,

[0200] An inlet flow path 7 is formed inside the heat insulating member 5. The inlet flow path 7 is used to connect the refrigerator accommodation space 40 and the freezing space 20, and guide the circulated gas sucked from the freezing space 20 through the suction port 27 to the refrigerator accommodation space 40.

[0201] The inlet flow path 7 is connected to the refrigerator accommodation space 40 via an inlet side communication hole 48A formed in the back plate portion 42 above the outlet side communication hole 47A.

[0202] According to the structure of the above 6), the inlet flow path 7 is connected to the refrigerator accommodation space 40 via the inlet side communication hole 48A formed in the back plate portion 42 above the outlet side communication hole 47A. At this time, the length of the pipe for guiding the circulated gas from the inlet flow path 7 to the refrigerator accommodation space 40 of the refrigerator 3 can be shortened, so that heat dissipation in the pipe can be suppressed. And according to the structure of the above 6), even when the thickness of the heat insulating member covering the upper part of the refrigerator housing 4 is relatively small, the inlet flow path 7 can be formed inside the heat insulating member.

[0203] 7) In some embodiments, the refrigerated container 1 according to any one of the above 1) to 4), wherein

[0204] The refrigerator housing 4 includes:

[0205] A back plate portion 42 extending in a direction orthogonal to the length direction of the container body 2 on the freezing space 20 side of the refrigerator 3;

[0206] A top plate portion 43 extending from the upper end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covering the upper part of the refrigerator 3; and

[0207] A bottom plate portion 44 extending from the lower end portion of the back plate portion 42 in a direction orthogonal to the height direction of the container body 2 and covering the lower part of the refrigerator 3,

[0208] The outlet flow path 6 is connected to the refrigerator accommodation space 40 via an outlet side communication hole 47B formed in the bottom plate portion 44.

[0209] According to the structure of the above 7), the outlet flow path 6 is connected to the refrigerator accommodation space 40 via the outlet side communication hole 47B formed in the bottom plate portion 44. At this time, it is easy to set the air outlet 26 on the lower side (bottom surface side) in the height direction of the container body 2. By increasing the difference between the air outlet 26 and the suction port 27 in the height direction of the container body 2, uneven temperature distribution in the height direction of the container body 2 in the freezing space 20 can be effectively suppressed.

[0210] 8) In some embodiments, for the refrigerated container 1 described in 7) above, wherein,

[0211] An inlet flow path 7 is formed inside the heat insulating member 5, and the inlet flow path 7 is used to connect the refrigerator accommodation space 40 and the refrigerated space 20, and guide the circulated gas sucked from the refrigerated space 20 through the suction port 27 to the refrigerator accommodation space 40.

[0212] The inlet flow path 7 is connected to the refrigerator accommodation space 40 via an inlet side communication hole 48B formed in the top plate portion 43.

[0213] According to the structure of 8) above, the inlet flow path 7 is connected to the refrigerator accommodation space 40 via the inlet side communication hole 48B formed in the top plate portion 43. At this time, it is easy to arrange the suction port 27 on the upper side (ceiling surface side) in the height direction of the container body 2.

[0214] 9) In some embodiments, for the refrigerated container 1 described in any one of 1) to 8) above, it further includes at least one laying member 8.

[0215] The at least one laying member 8 is laid on the bottom surface of the refrigerated space 20 of the container body 2, and a gas flow path 80 for gas flow is formed below the upper surface of the at least one laying member 8.

[0216] The air outlet 26 is configured to communicate with the gas flow path 80.

[0217] According to the structure of 9) above, the circulated gas (cold air) guided to the gas flow path 80 through the air outlet 26 flows above the upper surface of the laying member 8 after flowing through the gas flow path 80. At this time, the circulated gas (cold air) guided to the refrigerated space 20 through the air outlet 26 can be guided to a wide range of the refrigerated space 20. Therefore, even if goods to be cooled are placed on the upper surface of the laying member 8, the entire refrigerated space 20 can be effectively cooled.

[0218] 10) In some embodiments, for the refrigerated container 1 described in any one of 2), 6) or 8) above, wherein,

[0219] The air outlet 26 includes:

[0220] A first opening portion 261 having a longitudinal direction along the width direction of the container body 2; and

[0221] A first upper opening portion 262 having a longitudinal direction upward from one end portion in the width direction of the first opening portion 261.

[0222] The suction port 27 includes:

[0223] a second opening 271 having a longitudinal direction along the width direction of the container body 2; and

[0224] a first lower opening 272 having a longitudinal direction downward from the end on the other side in the width direction of the second opening 271.

[0225] According to the structure of item 10) above, the blow-out port 26 including the first opening 261 can introduce the circulating gas into a relatively wide range in the width direction of the freezing space 20. The suction port 27 including the second opening 271 can suck the in-store gas from a relatively wide range in the width direction of the freezing space 20. Thereby, it is possible to effectively suppress unevenness in the temperature distribution in the above-mentioned width direction of the freezing space 20.

[0226] According to the structure of item 10) above, the blow-out port 26 including the first upper opening 262 can introduce the circulating gas into a relatively wide range in the height direction of the freezing space 20. The suction port 27 including the first lower opening 272 can suck the in-store gas from a relatively wide range in the height direction of the freezing space 20. Thereby, it is possible to effectively suppress unevenness in the temperature distribution in the above-mentioned height direction of the freezing space 20.

[0227] 11) In some embodiments, the refrigerated container 1 according to item 10) above, wherein,

[0228] the blow-out port 26 further includes a second upper opening 263,

[0229] the second upper opening 263 has a longitudinal direction upward from the end on the other side in the width direction of the first opening 261,

[0230] the suction port 27 further includes a second lower opening 273,

[0231] the second lower opening 273 has a longitudinal direction downward from the end on one side in the width direction of the second opening 271.

[0232] According to the structure of item 11) above, the blow-out port 26 including the second upper opening 263 can introduce the circulating gas into a relatively wide range in the height direction of the freezing space 20. The suction port 27 including the second lower opening 273 can suck the in-store gas from a relatively wide range in the height direction of the freezing space 20. Thereby, it is possible to effectively suppress unevenness in the temperature distribution in the above-mentioned height direction of the freezing space 20.

[0233] 12) In some embodiments, for the refrigerated container 1 according to any one of the above 5) to 8), wherein,

[0234] The heat insulating member 5 includes:

[0235] A back surface side heat insulating member 5A, laminated on the back surface which is the surface on the refrigerating space 20 side of the back plate portion 42;

[0236] An upper surface side heat insulating member 5B, laminated on the upper surface of the top plate portion 43; and

[0237] A lower surface side heat insulating member 5C, laminated on the lower surface of the bottom plate portion 44.

[0238] According to the structure of the above 12), since the heat insulating member 5 includes the back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C, heat input into the refrigerator accommodation space 40 or heat dissipation from the refrigerator accommodation space 40 can be suppressed. The heat insulating member 5 including the back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C can set the shape of the outlet flow path 6 formed inside the heat insulating member 5 according to the positions of the outlet side communication holes 47A, 47B or the air outlet 26 to an appropriate shape. The heat insulating member 5 including the back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C can be applied to container bodies 2 with different specification dimensions by changing the thicknesses of the respective parts 5A, 5B, 5C of the heat insulating member without changing the refrigerator 3 or the refrigerator housing 4.

[0239] 13) In some embodiments, for the refrigerated container 1 according to the above 12), wherein,

[0240] The back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C of the heat insulating member 5 are formed separately.

[0241] According to the structure of the above 13), by separately forming the back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C, each part 5A, 5B, 5C of the heat insulating member can be closely attached to the refrigerator housing 4, so that leakage of fluid through the gap between the heat insulating member 5 and the refrigerator housing 4 can be effectively suppressed. Also, by separately forming the back surface side heat insulating member 5A, the upper surface side heat insulating member 5B and the lower surface side heat insulating member 5C, each part 5A, 5B, 5C of the heat insulating member that is damaged or severely deteriorated can be replaced separately, so that the maintainability of the heat insulating member can be improved.

[0242] 14) In some embodiments, for the refrigerated container 1 according to any one of the above 1) to 13), it further includes a metal plate 9 laminated on the surface of the heat insulating member 5 on the refrigerating space 20 side.

[0243] According to the structure of the above item 14), the metal plate 9 can be used to prevent the heat insulating member 5 from being damaged or deteriorated due to the collision of goods during unloading operations or the cleaning in the warehouse, etc., resulting in a decline in function. Therefore, the heat insulating performance of the heat insulating member 5 can be maintained for a relatively long time. By using a metal with a heat capacity smaller than that of the heat insulating member 5 for the metal plate 9, the time required to cool the refrigerated and frozen space 20 can be shortened.

[0244] 15) In some embodiments, for the refrigerated container 1 described in the above item 14), it further includes a hydrophobic layer 10A or a waterproof layer 10B formed between the heat insulating member 5 and the metal plate 9.

[0245] According to the structure of the above item 15), the hydrophobic layer 10A or the waterproof layer 10B can be used to prevent the heat insulating member 5 from getting wet due to the cleaning in the warehouse, etc., resulting in a decline in function. Therefore, the heat insulating performance of the heat insulating member 5 can be maintained for a relatively long time.

[0246] 16) In some embodiments, for the refrigerated container 1 described in any one of the above items 1) to 15), it further includes an outlet flow path side metal plate 11 laminated on the inner surface of the outlet flow path 6.

[0247] According to the structure of the above item 16), the outlet flow path side metal plate 11 laminated on the inner surface of the outlet flow path 6 becomes a reinforcing member, whereby the strength of the heat insulating member 5 can be improved. And the inner surface of the outlet flow path 6 can be prevented from being damaged or deteriorated by using the outlet flow path side metal plate 11.

[0248] 17) In some embodiments, for the refrigerated container 1 described in the above item 16), it further includes an outlet flow path side hydrophobic layer 12A or an outlet flow path side waterproof layer 12B formed between the inner surface of the outlet flow path 6 and the outlet flow path side metal plate 11.

[0249] According to the structure of the above item 17), the outlet flow path side hydrophobic layer 12A or the outlet flow path side waterproof layer 12B can be used to prevent the condensed water from invading the heat insulating member 5 through the outlet flow path 6, resulting in a decline in the heat insulating performance of the heat insulating member 5.

[0250] 18) In some embodiments, for the refrigerated container 1 described in the above item 1), it further includes at least one laying member 8,

[0251] The at least one laying member is laid on the bottom surface 22 of the refrigerated space 20 of the container body 2, and a gas flow path 80 for gas flow is formed below the upper surface 8a of the at least one laying member 8.

[0252] The chiller housing 4 includes:

[0253] The back plate portion 42 extends in a direction orthogonal to the length direction D1 of the container body 2 on the side closer to the freezing space 20 than the refrigerator 3; and

[0254] The bottom plate portion 44 extends from the lower end portion of the back plate portion 42 in a direction orthogonal to the height direction D3 of the container body 2 and covers the lower side of the refrigerator 3.

[0255] One end of the outlet flow path 6 is formed with the air outlet 26, and the air outlet 26 is configured to communicate with the gas flow path 80.

[0256] The other end is formed with an outlet opening 61, and the outlet opening 61 is configured to communicate with an outlet side communication hole 47 formed in the bottom plate portion 44.

[0257] According to the structure described in the above 18), the outlet flow path can be formed without passing through the inside of the back plate portion. Therefore, the thickness of the back plate portion can be reduced, thereby expanding the freezing space.

[0258] 19) In some embodiments, for the refrigerated container 1 described in the above 18), wherein,

[0259] At least a part 6a1 of the upper surface 6a of the outlet flow path 6 abuts against the upper surface 8a of the at least one laying member 8.

[0260] According to the structure described in the above 19), it is possible to prevent the circulating gas (cooled in the refrigerator) from being blown out from the outlet flow path to the freezing space without passing through the gas flow path.

[0261] 20) In some embodiments, for the refrigerated container 1 described in the above 19), wherein,

[0262] The at least one laying member 8 includes a plurality of guide rail members, the plurality of guide rail members are arranged at intervals of 83 along the width direction D2 of the container body 2, and extend along the length direction D1 of the container body 2 and the cross-sectional shape is formed in a T shape.

[0263] The upper surface 6a of the outlet flow path 6 includes an upper surface inclined portion 6a2 that slopes downward as it faces the freezing space 20 side.

[0264] One end of the upper surface inclined portion 6a2 on the freezing space 20 side is located on the freezing space 20 side of the outlet flow path 6 side of the guide rail member 8 in the length direction D1 of the container body 2 and abuts against the upper surface 8a of the guide rail member 8.

[0265] According to the structure described in 20) above, even if the ice formed due to the freezing of the moisture contained in the circulating air accumulates in a manner that blocks the air outlet of the outlet flow path, the circulating gas can flow into the gas flow path from above the guide rail member.

[0266] 21) In some embodiments, the refrigerated container 1 according to any one of 18) to 20) above, wherein,

[0267] The lower surface 6b of the outlet flow path 6 includes a lower surface inclined portion 6b1 that slopes downward as it faces the freezing space 20 side.

[0268] According to the structure described in 21) above, the circulating air flows through the outlet flow path in a manner that approaches along the direction in which the gas flow path extends. Therefore, the circulating air can smoothly flow from the outlet flow path into the gas flow path.

[0269] 22) In some embodiments, the refrigerated container 1 according to 21) above, wherein,

[0270] The lower surface inclined portion 6b1 is in the longitudinal direction D1 of the container body 2, and the front end 6b2 on the freezing space 20 side is spaced apart from the at least one laying member 8.

[0271] The bottom surface 221 faces the outlet flow path 6 between the front end 6b2 of the lower surface inclined portion 6b1 and the at least one laying member 8.

[0272] According to the structure described in 22) above, the ice can accumulate on the portion of the bottom surface facing the outlet flow path, thereby preventing the blockage of the air outlet of the outlet flow path.

[0273] 23) In some embodiments, the refrigerated container 1 according to 22) above, wherein,

[0274] If the height of the at least one laying member 8 is set as h and the distance between the at least one laying member 8 and the front end 6b2 of the lower surface inclined portion 6b1 is set as d,

[0275] Then h / 2 ≤ d ≤ 2h is satisfied.

[0276] According to the structure described in 23) above, a portion can be formed on the bottom surface that can prevent the blockage of the air outlet of the outlet flow path caused by the ice.

[0277] 24) In some embodiments, the refrigerated container 1 according to any one of 18) to 23) above, wherein,

[0278] The heat insulating member 5 includes a plurality of heat insulating member blocks BL1, BL2,

[0279] One of the plurality of heat insulating blocks forms the outlet flow path 6.

[0280] According to the structure described in 24) above, by forming the outlet flow path inside one heat insulating block, compared with the case of forming the outlet flow path by combining a plurality of heat insulating blocks, the number of heat insulating blocks required to form the outlet flow path can be reduced. Moreover, compared with the case of combining a plurality of heat insulating blocks, the manufacturing error of the outlet flow path can be reduced, thereby improving the heat insulation performance.

[0281] 25) In some embodiments, the refrigerated container 1 according to any one of 18) to 24) above, wherein,

[0282] The chiller housing 4 includes a back plate portion 42,

[0283] The back plate portion 42 extends in a direction orthogonal to the length direction D1 of the container body 2 on the side closer to the refrigerated space 20 than the chiller 3,

[0284] The refrigerated container 1 further includes an inlet flow path forming portion 90. The inlet flow path forming portion 90 is provided on the surface of the back plate portion 42 on the refrigerated space 20 side, that is, the back surface 421, and forms an inlet flow path 7. The inlet flow path 7 is used to connect the chiller accommodation space 40 and the refrigerated space 20, and guide the circulated gas sucked from the refrigerated space 20 through the suction port 27 to the chiller 3.

[0285] According to the structure described in 25) above, the circulated gas can be smoothly guided to the chiller.

[0286] 26) In some embodiments, the refrigerated container 1 according to 25) above, wherein,

[0287] The suction port 27 has a length direction along the width direction D2 of the container body 2,

[0288] The inlet flow path 7 communicates with the chiller accommodation space 40 through an inlet side communication hole 48 formed in the back plate portion 42,

[0289] The inlet side communication hole 48 is located above the lower surface 7a of the inlet flow path 7,

[0290] An inlet 95 of a drain hole 94 communicating with the refrigerated space 20 is formed on the lower surface 7a of the inlet flow path 7.

[0291] According to the structure described in 26) above, even if droplets are generated in the inlet flow path (for example, even if the ice formed during the cooling operation becomes droplets), the droplets can be discharged from the inlet flow path to the refrigerated space.

[0292] 27) In some embodiments, the refrigerated container 1 according to 25) or 26) above further includes at least one trapping plate 92,

[0293] The at least one trapping plate 92 is disposed in the inlet flow path 7 to block a part of the cross section of the inlet flow path 7.

[0294] According to the structure described in 27) above, by causing foreign matter flowing in the inlet flow path together with the circulating gas to collide with the trapping plate, intrusion of the foreign matter into the refrigerator can be suppressed.

[0295] 28) In some embodiments, in the refrigerated container 1 according to 27) above,

[0296] The at least one trapping plate 92 includes a first trapping plate 92A protruding from the lower surface 7a of the inlet flow path 7 and a second trapping plate 92B protruding from the upper surface 7b of the inlet flow path 7,

[0297] The first trapping plate 92A and the second trapping plate 92B are arranged along the width direction D2 of the container body 2.

[0298] According to the structure described in 28) above, intrusion of foreign matter into the refrigerator can be further suppressed.

[0299] 29) In some embodiments, in the refrigerated container 1 according to any one of 25) to 28) above,

[0300] A suction inlet filter 89 is provided at the suction inlet 27,

[0301] An inlet opening filter 93 with a smaller mesh opening than the suction inlet filter 89 is provided at the inlet opening 71 of the inlet flow path 7.

[0302] According to the structure described in 29) above, by removing relatively large foreign matter with the suction inlet filter and relatively small foreign matter with the inlet opening filter, the pressure loss of the circulating gas guided to the refrigerator can be reduced while suppressing the intrusion of foreign matter.

[0303] 30) In some embodiments, in the refrigerated container 1 according to 29) above,

[0304] The inlet flow path forming portion 90 includes a suction surface 96 formed with the suction inlet 27,

[0305] The suction surface 96 is inclined so as to approach the refrigerating space 20 as it goes upward.

[0306] According to the structure described in the above 30), it is possible to prevent droplets or foreign matter falling from the suction port filter from entering the inlet flow path.

[0307] 31) In some embodiments, for the refrigerated container 1 described in the above 25), wherein,

[0308] The suction port 27 is provided with a suction port filter 89 having a mesh opening of 1.0 mm or less.

[0309] The inlet opening 71 of the inlet flow path 7 is not provided with a filter.

[0310] According to the structure described in the above 31), as in the above 29), there is no need to provide an inlet opening filter, so the manufacturing cost and pressure loss can be reduced.

[0311] 32) In some embodiments, for the refrigerated container 1 described in any one of the above 25) to 31), it further includes at least two opposed surface heat insulators 98.

[0312] The at least two opposed surface heat insulators 98 are laminated on a portion 97 of the opposed surface 422 on the side of the refrigerating machine accommodation space 40 of the back plate portion 42, which is opposite to the back surface 421 of the back plate portion 42 facing the inlet flow path forming portion 90.

[0313] The at least two opposed surface heat insulators 98 are arranged along the width direction D2 of the container body 2.

[0314] According to the structure described in the above 32), by providing two opposed surface heat insulators on a portion of the opposed surface of the back plate portion that is opposite to the back surface of the back plate portion facing the inlet flow path forming portion, the heat insulation of the refrigerating machine can be improved. Further, one opposed surface heat insulator is disposed near the outlet (inlet side communication hole) of the inlet flow path and is separated from the other opposed surface heat insulator, thereby being able to prevent the heat insulation of the other opposed surface heat insulator from deteriorating.

[0315] 33) In some embodiments, for the refrigerated container 1 described in the above 32), wherein,

[0316] The heat insulator 5 includes a back surface side heat insulator 5A.

[0317] The back surface side heat insulator 5A is laminated on the back surface of the back plate portion 42 on the side of the refrigerating space 20.

[0318] The inlet flow path forming portion 90 is disposed above the back surface side heat insulator 5A.

[0319] The two opposed surface heat insulators 98A and 98B are respectively in the height direction D3 of the container main body 2, and the lower end portions 99A and 99B thereof overlap with the upper end portion 99C of the back surface side heat insulator 5A.

[0320] According to the structure described in the above 33), the refrigerator is covered by the back surface side heat insulator and the two opposed surface heat insulators in the height direction. Therefore, the heat insulation performance of the refrigerator can be improved.

[0321] Symbol Explanation

[0322] 1 - Refrigerated container, 2 - Container main body, 3 - Refrigerator, 4 - Refrigerator housing, 5 - Heat insulator, 5A - Back surface side heat insulator, 5B - Upper surface side heat insulator, 5C - Lower surface side heat insulator, 5D, 5E - Side surface side heat insulators, 6 - Outlet flow path, 6a - Upper surface of the outlet flow path, 6a1 - At least a part of the upper surface of the outlet flow path, 6a2 - Upper surface inclined portion, 6b - Lower surface of the outlet flow path, 6b1 - Lower surface inclined portion, 6b2 - Front end of the lower surface inclined portion, 7 - Inlet flow path, 7a - Lower surface of the inlet flow path, 7b - Upper surface of the inlet flow path, 8 - Laying member, 8a - Upper surface of the laying member, 9 - Metal plate, 10A - Hydrophobic layer, 10B - Waterproof layer, 11 - Outlet flow path side metal plate, 12A - Outlet flow path side hydrophobic layer, 12B - Outlet flow path side waterproof layer, 13 - Inlet flow path side metal plate, 14A - Inlet flow path side hydrophobic layer, 14B - Inlet flow path side waterproof layer, 15 - Metal filter, 20 - Refrigerated space, 21 - Ceiling wall, 22 - Bottom wall, 23, 24 - Long side walls, 25 - Door, 26 - Air outlet, 27 - Air inlet, 28 - Circulation pipeline, 28A - Suction gas pipeline, 28B - Compressed gas pipeline, 28C - Expanded gas pipeline, 31 - Compressor, 32 - Heat exchanger, 33 - Expander, 34 - Cooler, 35 - Coolant circulation pipeline, 36 - Cooling device, 37 - Pump, 38 - Rotating shaft, 39 - Electric motor, 40 - Refrigerator accommodation space, 41 - Outer wall surface, 42 - Back plate portion, 43 - Top plate portion, 44 - Bottom plate portion, 45, 46 - Side plate portions, 47, 47A, 47B - Outlet side communication holes, 48, 48A, 48B - Inlet side communication holes, 61 - Outlet opening, 62, 72 - Flow path area expansion portions, 71 - Inlet opening, 80 - Gas flow path, 83 - Gap, 89 - Air inlet filter, 90 - Inlet flow path forming portion, 92 - Trapping plate, 93 - Inlet opening filter, 94 - Drain hole, 95 - Inlet of the drain hole, 96 - Suction surface, 97 - Portion of the opposed surface of the back plate portion, 98 - Opposed surface heat insulator, 99A, 99B - Lower end portions of the opposed surface heat insulators, 99C - Upper end portion of the back surface side heat insulator, BL1, BL2 - Heat insulator blocks.

Claims

1. A refrigerated container, comprising: A container main body having a refrigerated space to be cooled inside; A refrigerator configured to be able to cool the circulated gas sucked from the refrigerated space; A refrigerator housing disposed inside the container main body and having a refrigerator accommodation space for accommodating the refrigerator therein; and A heat insulator laminated on the outer wall surface of the refrigerator housing, An outlet flow path is formed inside the heat insulator. The outlet flow path is used to connect the refrigerator accommodation space and the refrigerated space, and guide the circulated gas cooled in the refrigerator to the refrigerated space via an air outlet.

2. The refrigerated container according to claim 1, wherein An inlet flow path is formed inside the heat insulator. The inlet flow path is used to connect the refrigerator accommodation space and the refrigerated space, and guide the circulated gas sucked from the refrigerated space via a suction port to the refrigerator.

3. The refrigerated container according to claim 1, wherein At least a part of the outlet flow path includes a flow path area expansion part where the flow path area becomes larger toward the refrigerated space side.

4. The refrigerated container according to claim 3, wherein The flow path area expansion part of the outlet flow path is provided from the outlet opening of the outlet flow path connected to the refrigerator accommodation space to the air outlet.

5. The refrigerated container according to claim 1, wherein The refrigerator housing includes: A back plate portion extending in a direction orthogonal to the length direction of the container main body on the refrigerated space side of the refrigerator; A top plate portion extending in a direction orthogonal to the height direction of the container main body from the upper end portion of the back plate portion and covering the upper part of the refrigerator; and A bottom plate portion extending in a direction orthogonal to the height direction of the container main body from the lower end portion of the back plate portion and covering the lower part of the refrigerator, The outlet flow path is connected to the refrigerator accommodation space via an outlet side communication hole formed in the back plate portion.

6. The refrigerated container according to claim 5, wherein An inlet flow path is formed inside the heat insulator. The inlet flow path is used to connect the refrigerator accommodation space and the refrigerated space, and guide the circulated gas sucked from the refrigerated space via a suction port to the refrigerator accommodation space, The inlet flow path is connected to the refrigerator accommodation space via an inlet side communication hole formed in the back plate portion above the outlet side communication hole.

7. The refrigerated container according to claim 1, wherein The refrigerator housing includes: A back plate portion extending in a direction orthogonal to the length direction of the container main body on the refrigerated space side of the refrigerator; A top plate portion extending in a direction orthogonal to the height direction of the container main body from the upper end portion of the back plate portion and covering the upper part of the refrigerator; and A bottom plate portion extending in a direction orthogonal to the height direction of the container main body from the lower end portion of the back plate portion and covering the lower part of the refrigerator, The outlet flow path is connected to the refrigerator accommodation space via an outlet-side communication hole formed in the bottom plate portion.

8. The refrigerated container according to claim 7, wherein An inlet flow path is formed inside the heat insulating member. The inlet flow path is used to connect the refrigerator accommodation space and the refrigerated space, and guide the circulated gas sucked from the refrigerated space through the suction port to the refrigerator accommodation space. The inlet flow path is connected to the refrigerator accommodation space via an inlet-side communication hole formed in the top plate portion.

9. The refrigerated container according to any one of claims 1 to 8, further comprising at least one laying member. The at least one laying member is laid on the bottom surface of the refrigerated space of the container body, and a gas flow path for gas flow is formed below the upper surface of the at least one laying member. The air outlet is configured to communicate with the gas flow path.

10. The refrigerated container according to any one of claims 2, 6 or 8, wherein The air outlet includes: A first opening portion having a length direction along the width direction of the container body; and A first upper opening portion having a length direction upward from an end portion on one side in the width direction of the first opening portion. The suction port includes: A second opening portion having a length direction along the width direction of the container body; and A first lower opening portion having a length direction downward from an end portion on the other side in the width direction of the second opening portion.

11. The refrigerated container according to claim 10, wherein The air outlet further includes a second upper opening portion. The second upper opening portion has a length direction upward from the end portion on the other side in the width direction of the first opening portion. The suction port further includes a second lower opening portion. The second lower opening portion has a length direction downward from the end portion on one side in the width direction of the second opening portion.

12. The refrigerated container according to any one of claims 5 to 8, wherein The heat insulating member includes: A back-side heat insulating member laminated on the surface on the refrigerated space side of the back plate portion, i.e., the back surface; An upper-surface heat insulating member laminated on the upper surface of the top plate portion; and A lower-surface heat insulating member laminated on the lower surface of the bottom plate portion.

13. The refrigerated container according to claim 12, wherein The back-side heat insulating member, the upper-surface heat insulating member and the lower-surface heat insulating member of the heat insulating member are separately formed.

14. The refrigerated container according to any one of claims 1 to 8, further comprising a metal plate laminated on the surface on the refrigerated space side of the heat insulating member.

15. The refrigerated container according to claim 14, further comprising a hydrophobic layer or a waterproof layer formed between the heat insulating member and the metal plate.

16. The refrigerated container according to any one of claims 1 to 8, further comprising a metal plate on the inner surface of the outlet flow path laminated on the outlet flow path.

17. The refrigerated container according to claim 16, further comprising a hydrophobic layer or a waterproof layer on the outlet flow path side formed between the inner surface of the outlet flow path and the metal plate on the outlet flow path side.

18. The refrigerated container according to claim 1, further comprising at least one laying member, The at least one laying member is laid on the bottom surface of the refrigerated space of the container body, and a gas flow path for gas flow is formed below the upper surface of the at least one laying member. The chiller housing includes: A back plate portion extending in a direction orthogonal to the length direction of the container body on the refrigerated space side of the chiller; And A bottom plate portion extending from the lower end portion of the back plate portion in a direction orthogonal to the height direction of the container body and covering the lower side of the chiller. One end of the outlet flow path is formed with the air outlet, and the air outlet is configured to communicate with the gas flow path. The other end is formed with an outlet opening, and the outlet opening is configured to communicate with an outlet side communication hole formed in the bottom plate portion.

19. The refrigerated container according to claim 18, wherein At least a part of the upper surface of the outlet flow path abuts against the upper surface of the at least one laying member.

20. The refrigerated container according to claim 19, wherein The at least one laying member includes a plurality of guide rail members, the plurality of guide rail members are arranged at intervals in the width direction of the container body, and extend in the length direction of the container body and the cross-sectional shape is formed in a T shape. The upper surface of the outlet flow path includes an upper surface inclined portion that slopes downward as it faces the refrigerated space side. One end of the upper surface inclined portion on the refrigerated space side is located on the refrigerated space side of the outlet flow path side of the guide rail member in the length direction of the container body and abuts against the upper surface of the guide rail member.

21. The refrigerated container according to any one of claims 18 to 20, wherein The lower surface of the outlet flow path includes a lower surface inclined portion that slopes downward as it faces the refrigerated space side.

22. The refrigerated container according to claim 21, wherein The front end of the lower surface inclined portion on the refrigerated space side is separated from the at least one laying member in the length direction of the container body. The bottom surface faces the outlet flow path between the front end of the lower surface inclined portion and the at least one laying member.

23. The refrigerated container according to claim 22, wherein If the height of the at least one laying member is set as h and the distance between the at least one laying member and the front end of the lower surface inclined portion is set as d, Then h / 2 ≤ d ≤ 2h is satisfied.

24. The refrigerated container according to any one of claims 18 to 20, wherein The heat insulator includes a plurality of heat insulator blocks, One of the plurality of heat insulator blocks forms the outlet flow path.

25. The refrigerated container according to any one of claims 18 to 20, wherein The chiller housing includes a back plate portion. The back plate portion extends in a direction orthogonal to the length direction of the container body on the side closer to the refrigerating space than the refrigerator. The refrigerated container further includes an inlet flow path forming portion provided on the surface on the refrigerating space side of the back plate portion, i.e., the back surface, and an inlet flow path is formed. The inlet flow path is used to connect the refrigerator accommodation space and the refrigerating space and guide the circulating gas sucked from the refrigerating space through the suction port to the refrigerator.

26. The refrigerated container according to claim 25, wherein The suction port has a length direction along the width direction of the container body. The inlet flow path communicates with the refrigerator accommodation space through an inlet side communication hole formed in the back plate portion. The inlet side communication hole is located above the lower surface of the inlet flow path. An inlet of a drain hole communicating with the refrigerating space is formed on the lower surface of the inlet flow path.

27. The refrigerated container according to claim 25, further comprising at least one trapping plate. The at least one trapping plate is provided in the inlet flow path to block a part of the cross section of the inlet flow path.

28. The refrigerated container according to claim 27, wherein The at least one trapping plate includes a first trapping plate protruding from the lower surface of the inlet flow path and a second trapping plate protruding from the upper surface of the inlet flow path. The first trapping plate and the second trapping plate are arranged side by side along the width direction of the container body.

29. The refrigerated container according to claim 25, wherein A suction port filter is provided at the suction port. An inlet opening filter with a smaller mesh opening than the suction port filter is provided at the inlet opening of the inlet flow path.

30. The refrigerated container according to claim 29, wherein The inlet flow path forming portion includes a suction surface formed with the suction port. The suction surface is inclined so as to approach the refrigerating space as it faces upward.

31. The refrigerated container according to claim 25, wherein A suction port filter with a mesh opening of 1.0 mm or less is provided at the suction port. No filter is provided at the inlet opening of the inlet flow path.

32. The refrigerated container according to claim 25, further comprising at least two opposed surface heat insulating members. The at least two opposed surface heat insulating members are laminated on a part of the opposed surface on the refrigerator accommodation space side of the back plate portion, i.e., the side opposite to the back surface of the back plate portion facing the inlet flow path forming portion. The at least two opposed surface heat insulating members are arranged side by side along the width direction of the container body.

33. The refrigerated container according to claim 32, wherein The heat insulating member includes a back surface side heat insulating member. The back surface side heat insulating member is laminated on the surface on the refrigerating space side of the back plate portion, i.e., the back surface. The inlet flow path forming portion is arranged above the back surface side heat insulating member. The two opposed surface heat insulating members overlap each other at their lower end portions and the upper end portion of the back surface side heat insulating member in the height direction of the container body, respectively.

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