In-warehouse air conditioning device, refrigeration device and transport container

Abstract

The in-library air conditioning device (100) includes a composition adjustment unit (200). The outside air flowing in the first inflow path (111) and the inside air flowing in the second inflow path (112) flow into the composition adjustment unit (200) as the air to be processed. The composition adjustment unit (200) separates the air to be processed into first air and second air. The first air flows into the first outflow path (131). The second air flows into the second outflow path (132). The outlet switching mechanism (135) changes the destinations of the first air and the second air.

Description

Technical Field

[0001] The present disclosure relates to an in-store air conditioning device, a refrigeration device, and a transport container. Background Art

[0002] In Patent Document 1, an in-store air conditioning device for adjusting the composition of in-store air inside a storage is disclosed. In order to maintain the freshness of fresh products and the like stored in the storage, the in-store air conditioning device adjusts the oxygen concentration and the like of the in-store air.

[0003] The in-store air conditioning device in Patent Document 1 includes a first composition adjustment unit and a second composition adjustment unit. The first composition adjustment unit supplies supply air generated by adjusting the composition of outside air to the storage. The second composition adjustment unit supplies supply air generated by adjusting the composition of in-store air to the storage.

[0004] Patent Document 1: Japanese Patent Laid-Open Gazette No. 2019-66169 Summary of the Invention

[0005] -Technical Problem to be Solved by the Invention-

[0006] The in-store air conditioning device in Patent Document 1 employs a structure in which different composition adjustment units process outside air and in-store air. Therefore, there is a problem of complication of the device structure.

[0007] An object of the present disclosure is to simplify the structure of an in-store air conditioning device that processes outside air and in-store air.

[0008] -Technical Solution for Solving the Technical Problem-

[0009] A first aspect of the present disclosure is an in-store air conditioning device 100 that adjusts the composition of the in-store air inside the storage chamber 2. The in-store air conditioning device 100 includes a composition adjustment unit 200, a first inflow path 111, a second inflow path 112, a first outflow path 131, a second outflow path 132, and an outlet switching mechanism 135. The composition adjustment unit 200 separates the incoming air to be processed into first air and second air with different compositions. The first inflow path 111 allows the outside air outside the storage chamber 2 to flow toward the composition adjustment unit 200. The second inflow path 112 allows the in-store air to flow toward the composition adjustment unit 200. The first outflow path 131 allows the first air flowing out from the composition adjustment unit 200 to flow. The second outflow path 132 allows the second air flowing out from the composition adjustment unit 200 to flow. The outlet switching mechanism 135 switches between the following states: a state where the first outflow path 131 communicates with the inside of the storage chamber 2 and the second outflow path 132 communicates with the outside of the storage chamber 2, and a state where the second outflow path 132 communicates with the inside of the storage chamber 2 and the first outflow path 131 communicates with the outside of the storage chamber 2.

[0010] In the first aspect, both the outside air flowing in the first inflow path 111 and the in-store air flowing in the second inflow path 112 can flow into the composition adjustment unit 200. In the composition adjustment unit 200, first air and second air with different compositions are generated. The outlet switching mechanism 135 changes the destinations of the first air and the second air. In this aspect, since the composition adjustment unit 200 can process both the in-store air and the outside air, the structure of the in-store air conditioning device 100 is simplified.

[0011] A second aspect of the present disclosure is based on the above first aspect. The in-store air conditioning device 100 includes a supply unit 110 that sends the air inhaled from the first inflow path 111 and the second inflow path 112 to the composition adjustment unit 200.

[0012] In the second aspect, both the outside air flowing in the first inflow path 111 and the in-store air flowing in the second inflow path 112 are sent to the composition adjustment unit 200 by one supply unit 110.

[0013] A third aspect of the present disclosure is based on the above first or second aspect. The in-store air conditioning device 100 includes a first valve 116 and a second valve 117. The first valve 116 is provided on the first inflow path 111, and the second valve 117 is provided on the second inflow path 112.

[0014] In a third aspect, the first valve 116 switches between a state allowing the flow of outside-air in the first inflow path 111 and a state cutting off the flow of outside-air in the first inflow path 111, and the second valve 117 switches between a state allowing the flow of inside-air in the second inflow path 112 and a state cutting off the flow of inside-air in the second inflow path 112.

[0015] Based on the above third aspect, in a fourth aspect of the present disclosure, the inside-air conditioning device 100 includes a controller 180 that controls the first valve 116 and the second valve 117 so as to switch between the following states: a state in which the first valve 116 is in an open state and the second valve 117 is in a closed state, a state in which the first valve 116 is in a closed state and the second valve 117 is in an open state, and a state in which both the first valve 116 and the second valve 117 are in open states.

[0016] In the fourth aspect, by controlling the first valve 116 and the second valve 117 by the controller 180, the following states are switched: a state in which outside-air flows into the composition adjustment unit 200, a state in which inside-air flows into the composition adjustment unit 200, and a state in which both outside-air and inside-air flow into the composition adjustment unit 200.

[0017] Based on the above third or fourth aspect, in a fifth aspect of the present disclosure, the first valve 116 and the second valve 117 are respectively regulating valves with variable opening degrees.

[0018] In the fifth aspect, the opening degree of the first valve 116 and the opening degree of the second valve 117 can be respectively adjusted.

[0019] Based on the above first or second aspect, in a sixth aspect of the present disclosure, the inside-air conditioning device 100 includes an inlet switching mechanism 115 that switches between the following states: a state in which the composition adjustment unit 200 is in communication with the first inflow path 111 and disconnected from the second inflow path 112, a state in which the composition adjustment unit 200 is in communication with the second inflow path 112 and disconnected from the first inflow path 111, and a state in which the composition adjustment unit 200 is in communication with both the first inflow path 111 and the second inflow path 112.

[0020] The inlet switching mechanism 115 in the sixth aspect switches between the following states: a state in which outside-air flows into the composition adjustment unit 200, a state in which inside-air flows into the composition adjustment unit 200, and a state in which both outside-air and inside-air flow into the composition adjustment unit 200.

[0021] Based on the first or second aspect above, the seventh aspect of the present disclosure is that the in-store air conditioning device 100 includes a switching mechanism 165, and the switching mechanism 165 switches between the following states: a state in which the in-store air is sent to the second inflow path 112, and a state in which the in-store air is discharged to the outside of the storage chamber 2.

[0022] In the seventh aspect, the switching mechanism 165 switches the destination of the in-store air to either the outside of the storage chamber 2 or the second inflow path 112.

[0023] Based on the seventh aspect above, the eighth aspect of the present disclosure is that the in-store air conditioning device 100 includes an in-store air flow path 166 and an exhaust flow path 167. One end of the in-store air flow path 166 communicates with the inside of the storage chamber 2, and one end of the exhaust flow path 167 communicates with the outside of the storage chamber 2. The switching mechanism 165 is a three-way valve, and the second inflow path 112, the in-store air flow path 166, and the exhaust flow path 167 are connected to the switching mechanism 165. The switching mechanism 165 switches between the following states: a state in which the in-store air flow path 166 communicates with the second inflow path 112, and a state in which the in-store air flow path 166 communicates with the exhaust flow path 167.

[0024] In the eighth aspect, by using the three-way valve constituting the switching mechanism 165, it switches between the following states: a state in which the in-store air flowing in the in-store air flow path 166 flows into the second inflow path 112, and a state in which the in-store air flowing in the in-store air flow path 166 flows into the exhaust flow path 167.

[0025] Based on any one of the first to eighth aspects above, the ninth aspect of the present disclosure is that the composition adjustment unit 200 separates the air to be treated into the first air and the second air. The nitrogen concentration of the first air is higher than that of the air to be treated, and the oxygen concentration is lower than that of the air to be treated. The nitrogen concentration of the second air is lower than that of the air to be treated, and the oxygen concentration is higher than that of the air to be treated.

[0026] The composition adjustment unit 200 in the ninth aspect separates the air to be treated into the first air and the second air with different nitrogen concentrations and oxygen concentrations.

[0027] The tenth aspect of the present disclosure is a refrigeration device, which includes the in-store air conditioning device 100 according to any one of the first to ninth aspects above, and a refrigerant circuit 30 that performs a refrigeration cycle to adjust the temperature inside the storage chamber 2.

[0028] The refrigeration device 10 of the tenth aspect adjusts the composition of the air in the storage by the operation of the in-store air conditioning device 100, and adjusts the temperature of the air in the storage by the operation of the refrigerant circuit 30.

[0029] The eleventh aspect of the present disclosure is a transport container 1, which includes the refrigeration device 10 of the tenth aspect described above, and a container main body 2 on which the refrigeration device 10 is installed and which constitutes the storage.

[0030] In the transport container 1 of the eleventh aspect, the refrigeration device 10 adjusts the composition and temperature of the air inside the container main body 2. Description of the Drawings

[0031] Figure 1 is a perspective view of the transport container of the first embodiment as viewed from the front side;

[0032] Figure 2 is a simplified longitudinal sectional view showing the internal structure of the transport container of the first embodiment;

[0033] Figure 3 is a piping system diagram of the refrigerant circuit of the transport refrigeration device of the first embodiment;

[0034] Figure 4 is a piping system diagram showing the structure of the in-store air conditioning device of the first embodiment;

[0035] Figure 5 is a simplified sectional view of the separation module provided on the in-store air conditioning device of the first embodiment;

[0036] Figure 6 is equivalent to Figure 4 and shows the first operation of the in-store air conditioning device of the first embodiment;

[0037] Figure 7 is equivalent to Figure 4 and shows the second operation of the in-store air conditioning device of the first embodiment;

[0038] Figure 8 is equivalent to Figure 4 and shows the third operation of the in-store air conditioning device of the first embodiment;

[0039] Figure 9 is equivalent to Figure 4 and shows the fourth operation of the in-store air conditioning device of the first embodiment;

[0040] Figure 10 is equivalent to Figure 4 and shows the fifth operation of the in-store air conditioning device of the first embodiment;

[0041] Figure 11 is a diagram equivalent to Figure 4 and shows the sixth operation of the in-container air conditioning device of the first embodiment;

[0042] Figure 12 is a diagram equivalent to Figure 4 and shows the seventh operation of the in-container air conditioning device of the first embodiment;

[0043] Figure 13 is a piping system diagram showing the structure of the in-container air conditioning device of the second embodiment;

[0044] Figure 14 is a piping system diagram showing the structure of the in-container air conditioning device of the third embodiment;

[0045] Figure 15 is a diagram equivalent to Figure 14 and shows the first separation operation of the in-container air conditioning device of the third embodiment;

[0046] Figure 16 is a diagram equivalent to Figure 14 and shows the second separation operation of the in-container air conditioning device of the third embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0048] <<First Embodiment>>

[0049] The present disclosure is a transport container 1. The transport container 1 is a refrigerated container (reefer container) capable of managing the temperature inside the container. The transport container 1 is used for transporting fresh produce (e.g., fruits, vegetables, flowers, etc.). The fresh produce breathes, absorbs oxygen (O2) in the air, and releases carbon dioxide (CO2).

[0050] As Figure 1 shown, the transport container 1 includes a container main body 2 and a transport refrigeration device 10 provided on the container main body 2. The transport container 1 is used for maritime transport. The transport container 1 is transported by a maritime transport means such as a ship.

[0051] - Container Main Body -

[0052] The container main body 2 is a storage for storing the above-mentioned fresh produce.

[0053] The container main body 2 is formed in a hollow box shape. The container main body 2 is formed to have a relatively long lateral length. An opening is formed at one end in the longitudinal direction of the container main body 2. The opening of the container main body 2 is sealed by the transport refrigeration device 10. A storage space 5 for storing the object to be transported is formed inside the container main body 2.

[0054] -Transport Refrigeration Device-

[0055] The transport refrigeration device 10 is installed at the opening of the container main body 2. The transport refrigeration device 10 includes a housing 11 and a refrigerant circuit 30. The transport refrigeration device 10 adjusts the temperature of the air (indoor air) inside the storage space 5.

[0056] 〈Housing〉

[0057] As Figure 2 schematically shown, the housing 11 includes a partition wall 12 and a partition board 15.

[0058] An indoor flow path 20 is formed inside the partition wall 12. An outdoor chamber 25 is formed outside the partition wall 12. The indoor flow path 20 and the outdoor chamber 25 are separated by the partition wall 12.

[0059] The partition wall 12 includes an outdoor wall 13 and an indoor wall 14. The outdoor wall 13 is located outside the container main body 2. The indoor wall 14 is located inside the container main body 2.

[0060] The outdoor wall 13 seals the opening of the container main body 2. The outdoor wall 13 is installed at the peripheral portion of the opening of the container main body 2. The lower part of the outdoor wall 13 bulges toward the inside of the container main body 2. The outdoor chamber 25 is formed inside the bulging outdoor wall 13.

[0061] The indoor wall 14 faces the outdoor wall 13. The indoor wall 14 has a shape formed along the outdoor wall 13. The indoor wall 14 is arranged with a gap between it and the outdoor wall 13. A heat insulating material 16 is provided between the indoor wall 14 and the outdoor wall 13.

[0062] The partition board 15 is arranged at a position closer to the inside of the container main body 2 than the indoor wall 14. An indoor flow path 20 is formed between the partition wall 12 and the partition board 15. An inlet 21 is formed between the upper end of the partition board 15 and the top plate of the container main body 2. An outlet 22 is formed between the lower end of the partition board 15 and the lower end of the partition wall 12. The indoor flow path 20 is formed from the inlet 21 to the outlet 22.

[0063] 〈Elements of the Refrigerant Circuit〉

[0064] The refrigerant circuit 30 has refrigerant filled therein. The refrigerant circuit 30 performs a vapor compression refrigeration cycle by circulating the refrigerant. The refrigerant circuit 30 includes a compressor 31, an outdoor heat exchanger 32, an expansion valve 33, an indoor heat exchanger 60, and refrigerant pipes connecting these components.

[0065] The compressor 31 is arranged at the lower part in the outdoor chamber 25. The outdoor heat exchanger 32 is arranged at the upper part in the outdoor chamber 25. The outdoor heat exchanger 32 is a finned tube type heat exchanger that exchanges heat between the refrigerant and the outdoor air. The shape of the outdoor heat exchanger 32 is approximately rectangular cylindrical. The indoor heat exchanger 60 is arranged in the indoor flow path 20. The indoor heat exchanger 60 is a finned tube type heat exchanger that exchanges heat between the refrigerant and the indoor air.

[0066] 〈Outdoor Fan〉

[0067] The refrigeration device 10 for transportation includes an outdoor fan 34. The outdoor fan 34 is a propeller fan. The outdoor fan 34 is arranged in the outdoor chamber 25. In addition, the outdoor fan 34 is arranged inside the cylindrical outdoor heat exchanger 32. The outdoor fan 34 sends outdoor air to the outdoor heat exchanger 32.

[0068] 〈Indoor Fan〉

[0069] The refrigeration device 10 for transportation includes two indoor fans 35. The indoor fans 35 are propeller fans. The indoor fans 35 are arranged in the indoor flow path 20. In addition, the indoor fans 35 are arranged above the indoor heat exchanger 60. The indoor fans 35 send indoor air to the indoor heat exchanger 60.

[0070] 〈Heater〉

[0071] The refrigeration device 10 for transportation includes a heater 65. The heater 65 is arranged below the indoor heat exchanger 60. The heater 65 is used to melt the frost adhering to the indoor heat exchanger 60.

[0072] 〈Electronic Component Box〉

[0073] As Figure 1 shown, the refrigeration device 10 for transportation has an electronic component box 36. The electronic component box 36 is arranged at the upper part in the outdoor chamber 25. Electrical components such as an inverter board and a control board are housed inside the electronic component box 36.

[0074] - Structure of Refrigerant Circuit -

[0075] Refer to Figure 3 to describe the structure of the refrigerant circuit 30.

[0076] The refrigerant circuit 30 has a compressor 31, an outdoor heat exchanger 32, an expansion valve 33, and an indoor heat exchanger 60 as main components. The expansion valve 33 is an electronic expansion valve whose opening degree can be adjusted.

[0077] The refrigerant circuit 30 has a discharge pipe 41 and a suction pipe 42. One end of the discharge pipe 41 is connected to the discharge part of the compressor 31. The other end of the discharge pipe 41 is connected to the gas-side end of the outdoor heat exchanger 32. One end of the suction pipe 42 is connected to the suction part of the compressor 31. The other end of the suction pipe 42 is connected to the gas-side end of the indoor heat exchanger 60.

[0078] The refrigerant circuit 30 has a liquid pipe 43, a liquid receiver 44, a cooling heat exchanger 45, a first switching valve 46, a communication pipe 47, a second switching valve 48, an injection pipe 49, and an injection valve 50.

[0079] One end of the liquid pipe 43 is connected to the liquid-side end of the outdoor heat exchanger 32. The other end of the liquid pipe 43 is connected to the liquid-side end of the indoor heat exchanger 60. The liquid receiver 44 is provided on the liquid pipe 43. The liquid receiver 44 is a container for storing refrigerant.

[0080] The cooling heat exchanger 45 has a first flow path 45a and a second flow path 45b. The cooling heat exchanger 45 causes the refrigerant in the first flow path 45a to exchange heat with the refrigerant in the second flow path 45b. The cooling heat exchanger 45 is, for example, a plate heat exchanger. The first flow path 45a is arranged in the middle of the liquid pipe 43. The second flow path 45b is arranged in the middle of the injection pipe 49. The cooling heat exchanger 45 cools the refrigerant flowing in the liquid pipe 43.

[0081] The first switching valve 46 is provided at a position between the liquid receiver 44 and the first flow path 45a in the liquid pipe 43. The first switching valve 46 is an electromagnetic valve that can be opened and closed.

[0082] The communication pipe 47 connects the high-pressure pipe and the low-pressure pipe of the refrigerant circuit 30. One end of the communication pipe 47 is connected to the discharge pipe 41. The other end of the communication pipe 47 is connected to a position between the expansion valve 33 and the indoor heat exchanger 60 in the liquid pipe 43.

[0083] The second switching valve 48 is provided on the communication pipe 47. The second switching valve 48 is an electromagnetic valve that can be opened and closed.

[0084] The injection pipe 49 introduces refrigerant into the intermediate-pressure part of the compressor 31. One end of the injection pipe 49 is connected to a position between the liquid receiver 44 and the first flow path 45a in the liquid pipe 43. The other end of the injection pipe 49 is connected to the intermediate-pressure part of the compressor 31. The pressure of the intermediate-pressure part, i.e., the intermediate pressure, is higher than the suction pressure of the compressor 31 and lower than the discharge pressure of the compressor 31.

[0085] The injection valve 50 is provided at the upstream portion of the second flow path 45b in the injection pipe 49. The injection valve 50 is an electronic expansion valve whose opening degree can be adjusted.

[0086] -Operation of the transport refrigeration device-

[0087] The basic operation of the transport refrigeration device 10 will be described. When the transport refrigeration device 10 operates, the compressor 31, the outdoor fan 34, and the indoor fan 35 operate. The first switching valve 46 is opened. The second switching valve 48 is closed. The opening degree of the expansion valve 33 is adjusted. The opening degree of the injection valve 50 is adjusted.

[0088] The refrigerant compressed in the compressor 31 flows in the outdoor heat exchanger 32. In the outdoor heat exchanger 32, the refrigerant releases heat to the outdoor air and condenses. The condensed refrigerant passes through the liquid receiver 44. A part of the refrigerant that has passed through the liquid receiver 44 flows in the first flow path 45a of the cooling heat exchanger 45. The remaining part of the refrigerant that has passed through the liquid receiver 44 flows in the injection pipe 49 and is decompressed to an intermediate pressure in the injection valve 50. The decompressed refrigerant is introduced into the intermediate pressure portion of the compressor 31.

[0089] In the cooling heat exchanger 45, the refrigerant in the second flow path 45b absorbs heat from the refrigerant in the first flow path 45a and evaporates. As a result, the refrigerant in the first flow path 45a is cooled. In other words, the degree of subcooling of the refrigerant flowing in the first flow path 45a increases.

[0090] The refrigerant cooled in the cooling heat exchanger 45 is decompressed to a low pressure in the expansion valve 33. The decompressed refrigerant flows in the indoor heat exchanger 60. In the indoor heat exchanger 60, the refrigerant absorbs heat from the indoor air and evaporates. As a result, the indoor heat exchanger 60 cools the indoor air. The evaporated refrigerant is sucked into the compressor 31 and compressed again.

[0091] The indoor air in the container main body 2 circulates in the storage space 5 and the indoor flow path 20. In the indoor flow path 20, the indoor air is cooled by the indoor heat exchanger 60. In this way, the indoor air in the storage space 5 can be cooled, and the indoor air can be adjusted to a specified temperature.

[0092] -Indoor air conditioning device-

[0093] The transport refrigeration device 10 of the present embodiment includes an indoor air conditioning device 100.

[0094] For performing so-called CA (Controlled Atmosphere) transportation, an in-store air conditioning device 100 is provided on a refrigeration device 10 for transportation. The in-store air conditioning device 100 adjusts the composition of the air in the storage space 5 of the transportation container 1 to be different from that of the atmosphere.

[0095] As Figure 4 shown, the in-store air conditioning device 100 includes an air pump 110, a separation module 200, a sensor unit 150, an exhaust pipe 160 for ventilation, and a controller 180.

[0096] The air pump 110 and the controller 180 are provided in an out-of-store room 25 of the refrigeration device 10 for transportation. The separation module 200 and the sensor unit 150 are provided inside a partition wall 12 (inside the store) of the refrigeration device 10 for transportation.

[0097] Pipes for air flow are connected to the air pump 110, the separation module 200, and the sensor unit 150. The pipes connected to these components and the exhaust pipe 160 for ventilation can be composed of rigid pipes, can be composed of flexible hoses, or can be composed by combining pipes and hoses.

[0098] 〈Air pump〉

[0099] The air pump 110 pressurizes the air inhaled from the suction port and ejects the pressurized air from the ejection port. The air pump 110 is a supply unit that sends the inhaled air to the separation module 200.

[0100] 〈Separation module〉

[0101] The separation module 200 is a composition adjustment unit that separates the incoming air to be processed into first air and second air with different compositions. The separation module 200 includes an inlet port 205 for the air to be processed to flow in, a first outlet port 206 for the first air to flow out, and a second outlet port 207 for the second air to flow out, which will be described in detail later.

[0102] 〈Inflow pipe〉

[0103] The in-store air conditioning device 100 includes a first inflow pipe 111, a second inflow pipe 112, and an inflow main pipe 113.

[0104] The inlet end of the first inflow pipe 111 is located outside the partition wall 12 (out-of-store space). The first inflow pipe 111 is a first inflow path that sends the air outside the transportation container 1 (out-of-store air) to the air pump 110. An air filter 111a is provided at the inlet end of the first inflow pipe 111. The air filter 111a is a membrane filter for capturing dust, salts, etc. contained in the out-of-store air.

[0105] The inlet end of the second inflow pipe 112 is located inside the partition wall 12 (the space inside the storage). The second inflow pipe 112 is a pipe that sends the air inside the transportation container 1 (the air inside the storage) to the air pump 110. An air filter 112a is provided at the inlet end of the second inflow pipe 112. The air filter 112a is a membrane filter for capturing dust and the like contained in the air inside the storage.

[0106] The outlet end of the first inflow pipe 111 and the outlet end of the second inflow pipe 112 are connected to the inlet end of the main inflow pipe 113. The outlet end of the main inflow pipe 113 is connected to the suction port of the air pump 110.

[0107] A first valve 116 is provided on the first inflow pipe 111. A second valve 117 is provided on the second inflow pipe 112. Both the first valve 116 and the second valve 117 are solenoid valves. The first valve 116 allows the outside air to flow in the first inflow pipe 111 or cuts off the flow of the outside air in the first inflow pipe 111. The second valve 117 allows the air inside the storage to flow in the second inflow pipe 112 or cuts off the flow of the air inside the storage in the second inflow pipe 112. The first valve 116 and the second valve 117 constitute an inlet switching mechanism 115 for selectively allowing one or both of the outside air and the air inside the storage to flow into the inlet of the air pump 110.

[0108] 〈Connecting Pipe, Bypass Switching Valve, Bypass Pipe〉

[0109] The air conditioning device 100 inside the storage includes a first connecting pipe 121, a second connecting pipe 122, a bypass switching valve 123, and a bypass pipe 124.

[0110] The inlet end of the first connecting pipe 121 is connected to the discharge port of the air pump 110, and the outlet end of the first connecting pipe 121 is connected to the bypass switching valve 123. The inlet end of the second connecting pipe 122 is connected to the bypass switching valve 123, and the outlet end of the second connecting pipe 122 is connected to the inlet port 205 of the separation module 200.

[0111] The inlet end of the bypass pipe 124 is connected to the bypass switching valve 123, and the outlet end of the bypass pipe 124 is connected to the first outflow pipe 131 described later. The bypass pipe 124 is a pipe for the air discharged from the air pump 110 to flow around the separation module 200.

[0112] The bypass switching valve 123 is a three-way valve to which the first connecting pipe 121, the second connecting pipe 122, and the bypass pipe 124 are connected. The bypass switching valve 123 switches between a first state and a second state. In the first state, it connects the first connecting pipe 121 and the second connecting pipe 122 and disconnects from the bypass pipe 124. In the second state, it connects the first connecting pipe 121 and the bypass pipe 124 and disconnects from the second connecting pipe 122.

[0113] 〈Outlet Pipe〉

[0114] The in - store air - conditioning device 100 includes a first outlet pipe 131 and a second outlet pipe 132.

[0115] The inlet end of the first outlet pipe 131 is connected to the first outlet port 206 of the separation module 200, and the outlet end of the first outlet pipe 131 is connected to a first switching valve 136 described later. The first outlet pipe 131 is a first outlet path for the first air flowing out from the separation module 200. A first check valve 131a is provided on the first outlet pipe 131. The first check valve 131a allows air to flow in the direction of flowing out from the separation module 200 and blocks air from flowing in the opposite direction. The outlet end of the bypass pipe 124 is connected downstream of the first check valve 131a in the first outlet pipe 131.

[0116] The inlet end of the second outlet pipe 132 is connected to the second outlet port 207 of the separation module 200, and the outlet end of the second outlet pipe 132 is connected to a second switching valve 137 described later. The second outlet pipe 132 is a second outlet path for the second air flowing out from the separation module 200. A second check valve 132a is provided on the second outlet pipe 132. The second check valve 132a allows air to flow in the direction of flowing out from the separation module 200 and blocks air from flowing in the opposite direction.

[0117] 〈Supply Pipe, Discharge Pipe, Switching Valve〉

[0118] The in - store air - conditioning device 100 includes a first supply pipe 141, a second supply pipe 142, a first discharge pipe 146, a second discharge pipe 147, a main discharge pipe 148, a first switching valve 136, and a second switching valve 137.

[0119] The inlet end of the first supply pipe 141 is connected to the first switching valve 136, and the outlet end of the first supply pipe 141 is downstream of the in - store fan 35 in the in - store flow path 20. The first supply pipe 141 is a pipe for supplying the first air to the storage space 5. The inlet end of the second supply pipe 142 is connected to the second switching valve 137, and the outlet end of the second supply pipe 142 is downstream of the in - store fan 35 in the in - store flow path 20. The second supply pipe 142 is a pipe for supplying the second air to the storage space 5.

[0120] The inlet end of the first discharge pipe 146 is connected to the first switching valve 136, and the outlet end of the first discharge pipe 146 is connected to the main discharge pipe 148. The first discharge pipe 146 is a pipe for discharging the first air to the outside space of the warehouse. The inlet end of the second discharge pipe 147 is connected to the second switching valve 137, and the outlet end of the second discharge pipe 147 is connected to the main discharge pipe 148. The second discharge pipe 147 is a pipe for discharging the second air to the outside space of the warehouse. The first discharge pipe 146 and the second discharge pipe 147 are connected to the inlet end of the main discharge pipe 148. The outlet end of the main discharge pipe 148 is located in the outside space of the warehouse outside the partition wall 12.

[0121] The first switching valve 136 is a three-way valve connected to the first outflow pipe 131, the first supply pipe 141, and the first discharge pipe 146. The first switching valve 136 switches between a first state and a second state. In the first state, the first outflow pipe 131 is communicated with the first supply pipe 141 and disconnected from the first discharge pipe 146. In the second state, the first outflow pipe 131 is communicated with the first discharge pipe 146 and disconnected from the first supply pipe 141.

[0122] The second switching valve 137 is a three-way valve connected to the second outflow pipe 132, the second supply pipe 142, and the second discharge pipe 147. The second switching valve 137 switches between a first state and a second state. In the first state, the second outflow pipe 132 is communicated with the second supply pipe 142 and disconnected from the second discharge pipe 147. In the second state, the second outflow pipe 132 is communicated with the second discharge pipe 147 and disconnected from the second supply pipe 142.

[0123] The first switching valve 136 and the second switching valve 137 constitute an outlet switching mechanism, and this outlet switching mechanism switches the following states: a state where the first outflow pipe 131 is communicated with the internal flow path 20 of the warehouse and the second outflow pipe 132 is communicated with the outside space of the warehouse, and a state where the second outflow pipe 132 is communicated with the internal flow path 20 of the warehouse and the first outflow pipe 131 is communicated with the outside space of the warehouse.

[0124] 〈Sensor unit〉

[0125] The sensor unit 150 includes an oxygen sensor 151, a carbon dioxide sensor 152, and a sensor housing 153.

[0126] The oxygen sensor 151 is a zirconia current type sensor for measuring the concentration of oxygen in a mixed gas such as air. The carbon dioxide sensor 152 is a non-dispersive infrared (NDIR: Non-Dispersive InfraRed) type sensor for measuring the concentration of carbon dioxide in a mixed gas such as air. The oxygen sensor 151 and the carbon dioxide sensor 152 are housed in the sensor housing 153.

[0127] The sensor housing 153 is a box-shaped component. The sensor housing 153 includes an air filter 153a. The air filter 153a is a membrane filter for capturing dust and the like contained in the air inside the storage. The air filter 153a filters the air inside the storage flowing into the sensor housing 153.

[0128] A measurement pipe 156 and an outlet pipe 157 are connected to the sensor housing 153. The inlet end of the measurement pipe 156 is connected downstream of the first check valve 131a in the first outflow pipe 131, and the outlet end of the measurement pipe 156 is connected to the sensor housing 153. A measurement switching valve 156a is provided on the measurement pipe 156. The measurement switching valve 156a is an electromagnetic valve. The inlet end of the outlet pipe 157 is connected to the sensor housing 153, and the outlet end of the outlet pipe 157 is located upstream of the storage fan 35 in the storage flow path 20 inside the storage.

[0129] 〈Vent exhaust pipe〉

[0130] The vent exhaust pipe 160 is a pipe for discharging the air inside the storage of the transport container 1 to the outside space. The vent exhaust pipe 160 penetrates through the partition wall 12 of the transport refrigeration device 10. An exhaust valve 161 is provided on the vent exhaust pipe 160. The exhaust valve 161 is an electromagnetic valve.

[0131] 〈Controller〉

[0132] The controller 180 includes a microcomputer 181 and a storage device 182. Among them, the microcomputer 181 is installed on the control board, and the storage device 182 stores software for operating the microcomputer 181. The storage device 182 is a semiconductor memory. The controller 180 controls the component devices of the air conditioning device 100 inside the storage. For example, the controller 180 opens and closes the first valve 116 and the second valve 117 that constitute the inlet switching mechanism 115, and switches the first switching valve 136 and the second switching valve 137 that constitute the outlet switching mechanism 135 respectively.

[0133] -Structure of the separation module-

[0134] Refer to Figure 5 The structure of the separation module 200 will be described.

[0135] The separation module 200 includes a cylindrical housing 210 and two partition parts 211a, 211b. The cylindrical housing 210 is an elongated cylindrical container with both ends closed. The partition parts 211a, 211b are components for partitioning the internal space of the cylindrical housing 210, and are arranged to cross the internal space of the cylindrical housing 210.

[0136] The partition parts 211a and 211b are respectively arranged at a position near one end and a position near the other end of the internal space of the cylindrical housing 210. In Figure 5 the internal space of the cylindrical housing 210 is partitioned into an introduction chamber 212 on the left side of the partition part 211a on the left side, a secondary side extraction chamber 214 between the two partition parts 211a and 211b, and a primary side extraction chamber 213 on the right side of the partition part 211b on the right side.

[0137] The separation module 200 includes a plurality of gas separation membranes 215 formed in a hollow filamentous shape (i.e., a very thin tubular shape with an outer diameter of 1 mm or less). The hollow filamentous gas separation membranes 215 are provided to extend from one partition part 211a to the other partition part 211b. One end portion of each gas separation membrane 215 penetrates through one partition part 211a and communicates with the introduction chamber 212, and the other end portion of each gas separation membrane 215 penetrates through the other partition part 211b and communicates with the primary side extraction chamber 213.

[0138] In the internal space of the cylindrical housing 210, the portion outside the gas separation membranes 215 in the space sandwiched by the two partition parts 211a and 211b constitutes the secondary side extraction chamber 214. In the separation module 200, the introduction chamber 212 and the primary side extraction chamber 213 are communicated via the hollow filamentous gas separation membranes 215. On the other hand, the secondary side extraction chamber 214 is not communicated with the space inside the gas separation membranes 215, the introduction chamber 212, and the primary side extraction chamber 213.

[0139] An inlet port 205, a first outlet port 206, and a second outlet port 207 are provided on the cylindrical housing 210. The inlet port 205 is arranged at Figure 5 the left end portion of the cylindrical housing 210 in Figure 5 and communicates with the introduction chamber 212. The first outlet port 206 is arranged at

[0140] the right end portion of the cylindrical housing 210 in

[0141] and communicates with the primary side extraction chamber 213. The second outlet port 207 is arranged at the middle portion in the longitudinal direction of the cylindrical housing 210 and communicates with the secondary side extraction chamber 214.

[0142] In the separation module 200, the processed air flowing into the introduction chamber 212 through the inlet port 205 flows toward the primary-side extraction chamber 213 in the space inside the hollow filamentous gas separation membrane 215. A part of the air flowing in the space inside the gas separation membrane 215 penetrates the gas separation membrane 215 and moves to the secondary-side extraction chamber 214, and the remaining part flows into the primary-side extraction chamber 213.

[0143] The penetration rate of nitrogen through the gas separation membrane 215 of the separation module 200 is lower than the penetration rates of oxygen and carbon dioxide through the gas separation membrane 215 of the separation module 200. That is, nitrogen is less likely to penetrate the gas separation membrane 215 compared to oxygen and carbon dioxide. Therefore, as the air flowing inside the hollow filamentous gas separation membrane 215 approaches the primary-side extraction chamber 213, its nitrogen concentration increases, while its oxygen concentration and carbon dioxide concentration decrease. In addition, oxygen and carbon dioxide contained in the air flowing in the hollow filamentous gas separation membrane 215 penetrate the gas separation membrane 215 and move to the secondary-side extraction chamber 214.

[0144] As a result, the air that does not penetrate the gas separation membrane 215 and flows into the primary-side extraction chamber 213 has a higher nitrogen concentration and lower oxygen and carbon dioxide concentrations than the air in the introduction chamber 212. In addition, the air that penetrates the gas separation membrane 215 and moves to the secondary-side extraction chamber 214 has a lower nitrogen concentration and higher oxygen and carbon dioxide concentrations than the air in the introduction chamber 212.

[0145] In the separation module 200, the processed air flows into the introduction chamber 212 from the inlet port 205. The air that does not penetrate the gas separation membrane 215 and flows into the primary-side extraction chamber 213 flows out as the first air from the first outlet port 206, and the air that penetrates the gas separation membrane 215 and flows into the secondary-side extraction chamber 214 flows out as the second air from the second outlet port 207.

[0146] -Operation of the in-store air conditioning device-

[0147] The operation of the in-store air conditioning device 100 will be described. The in-store air conditioning device 100 performs various operations. Here, a part of the operations performed by the in-store air conditioning device 100 will be described. It should be noted that in the first to seventh operations described below, the controller 180 sets the measurement switching valve 156a and the exhaust valve 161 to the closed state.

[0148] 〈First operation〉

[0149] The first operation is an operation in which both the outside air of the storage and the inside air of the storage are used as the air to be processed, the first air is supplied into the storage, and the second air is discharged to the outside of the storage. This first operation is performed to reduce the oxygen concentration of the inside air in the storage space 5.

[0150] As Figure 6 shown, in the first operation, the controller 180 sets both the first valve 116 and the second valve 117 to the open state, sets the bypass switching valve 123 to the first state, sets the first switching valve 136 to the first state, and sets the second switching valve 137 to the second state.

[0151] The outside air flowing in the first inflow pipe 111 and the inside air flowing in the second inflow pipe 112 flow into the inflow main pipe 113 and are mixed, and then are sucked into the air pump 110 as the air to be processed. The air pump 110 pressurizes the sucked air to be processed and then ejects it. The air to be processed ejected from the air pump 110 flows into the separation module 200 through the first connection pipe 121 and the second connection pipe 122 in sequence.

[0152] In the separation module 200, the air to be processed is separated into the first air and the second air. The first air with an oxygen concentration lower than that of the air to be processed is supplied to the inside flow path 20 through the first outflow pipe 131 and the first supply pipe 141 in sequence. The second air with an oxygen concentration higher than that of the air to be processed is discharged to the outside space through the second outflow pipe 132, the second discharge pipe 147, and the discharge main pipe 148 in sequence.

[0153] In the first operation, the flow rate of the first air supplied to the inside of the storage is larger than the flow rate of the second air discharged to the outside. As a result, the air pressure in the storage space 5 is higher than the air pressure outside the transport container 1 (i.e., the atmospheric pressure). That is to say, the storage space 5 is maintained at a positive pressure.

[0154] 〈Second operation〉

[0155] The second operation is an operation in which the outside air of the storage is used as the air to be processed, the first air is supplied into the storage, and the second air is discharged to the outside of the storage. This second operation is performed to reduce the oxygen concentration of the inside air in the storage space 5.

[0156] As Figure 7 shown, in the second operation, the controller 180 sets the first valve 116 to the open state, sets the second valve 117 to the closed state, sets the bypass switching valve 123 to the first state, sets the first switching valve 136 to the first state, and sets the second switching valve 137 to the second state.

[0157] The outside-air in the first inflow pipe 111 is inhaled by the air pump 110 as the air to be processed, pressurized, and then flows into the separation module 200. In the separation module 200, the air to be processed is separated into first air and second air. The first air with an oxygen concentration lower than that of the air to be processed is supplied to the intracooler flow path 20 through the first outflow pipe 131 and the first supply pipe 141 in sequence. The second air with an oxygen concentration higher than that of the air to be processed is discharged to the outside-air space through the second outflow pipe 132, the second discharge pipe 147, and the discharge main pipe 148 in sequence.

[0158] 〈Third operation〉

[0159] The third operation is an operation of using the intracooler air as the air to be processed, supplying the first air to the intracooler, and discharging the second air to the outside. This third operation is performed to reduce the carbon dioxide concentration of the intracooler air in the storage space 5.

[0160] As Figure 8 shown, in the third operation, the controller 180 sets the first valve 116 to the closed state, the second valve 117 to the open state, the bypass switching valve 123 to the first state, the first switching valve 136 to the first state, and the second switching valve 137 to the second state.

[0161] The intracooler air flowing in the second inflow pipe 112 is inhaled by the air pump 110 as the air to be processed, pressurized, and then flows into the separation module 200. In the separation module 200, the air to be processed is separated into first air and second air. The first air with a carbon dioxide concentration lower than that of the air to be processed is supplied to the intracooler flow path 20 through the first outflow pipe 131 and the first supply pipe 141 in sequence. The second air with a carbon dioxide concentration higher than that of the air to be processed is discharged to the outside-air space through the second outflow pipe 132, the second discharge pipe 147, and the discharge main pipe 148 in sequence.

[0162] 〈Fourth operation〉

[0163] The fourth operation is an operation of using both the outside-air and the intracooler air as the air to be processed, discharging the first air to the outside, and supplying the second air to the intracooler. This fourth operation is performed to increase the oxygen concentration of the intracooler air in the storage space 5.

[0164] As Figure 9 shown, in the fourth operation, the controller 180 sets both the first valve 116 and the second valve 117 to the open state, the bypass switching valve 123 to the first state, the first switching valve 136 to the second state, and the second switching valve 137 to the first state.

[0165] The outside-air in the first inflow pipe 111 and the inside-air in the second inflow pipe 112 flow into the inflow main pipe 113 and are mixed, and then are sucked into the air pump 110 as the air to be treated. The air pump 110 pressurizes the sucked air to be treated and then ejects it. The air to be treated ejected from the air pump 110 flows into the separation module 200 successively through the first connection pipe 121 and the second connection pipe 122.

[0166] In the separation module 200, the air to be treated is separated into first air and second air. The first air with an oxygen concentration lower than that of the air to be treated is discharged to the outside space of the container successively through the first outflow pipe 131, the first discharge pipe 146, and the discharge main pipe 148. The second air with an oxygen concentration higher than that of the air to be treated is supplied to the inside flow path 20 successively through the second outflow pipe 132 and the second supply pipe 142.

[0167] In the fourth operation, the flow rate of the second air supplied to the inside of the container is larger than the flow rate of the first air discharged to the outside of the container. As a result, the air pressure in the storage space 5 is higher than the air pressure outside the transport container 1 (i.e., the atmospheric pressure). That is to say, the storage space 5 is maintained at a positive pressure.

[0168] 〈Fifth operation〉

[0169] The fifth operation is an operation in which the outside-air of the container is used as the air to be treated, the first air is discharged to the outside of the container, and the second air is supplied to the inside of the container. This fifth operation is performed to increase the oxygen concentration of the inside-air in the storage space 5.

[0170] As Figure 10 shown, in the fifth operation, the controller 180 sets the first valve 116 to the open state, sets the second valve 117 to the closed state, sets the bypass switching valve 123 to the first state, sets the first switching valve 136 to the second state, and sets the second switching valve 137 to the first state.

[0171] The outside-air in the first inflow pipe 111 is sucked into the air pump 110 as the air to be treated and is pressurized, and then flows into the separation module 200. In the separation module 200, the air to be treated is separated into first air and second air. The first air with an oxygen concentration lower than that of the air to be treated is discharged to the outside space of the container successively through the first outflow pipe 131, the first discharge pipe 146, and the discharge main pipe 148. The second air with an oxygen concentration higher than that of the air to be treated is supplied to the inside flow path 20 successively through the second outflow pipe 132 and the second supply pipe 142.

[0172] 〈Sixth operation〉

[0173] The sixth operation is an operation in which the air inside the storage is used as the air to be processed, the first air is discharged outside the storage, and the second air is supplied into the storage. This sixth operation is performed to increase the carbon dioxide concentration of the air inside the storage in the storage space 5.

[0174] As Figure 11 shown, in the sixth operation, the controller 180 sets the first valve 116 to the closed state, sets the second valve 117 to the open state, sets the bypass switching valve 123 to the first state, sets the first switching valve 136 to the second state, and sets the second switching valve 137 to the first state.

[0175] The air inside the storage flowing in the first inflow pipe 111 is sucked into the air pump 110 as the air to be processed and pressurized, and then flows into the separation module 200. In the separation module 200, the air to be processed is separated into the first air and the second air. The first air with a lower carbon dioxide concentration than the air to be processed is discharged to the outside space of the storage through the first outflow pipe 131, the first discharge pipe 146, and the discharge main pipe 148 in sequence. The second air with a higher carbon dioxide concentration than the air to be processed is supplied to the internal flow path 20 through the second outflow pipe 132 and the second supply pipe 142 in sequence.

[0176] 〈Seventh operation〉

[0177] The seventh operation is an operation in which the outside air is directly supplied into the storage. This seventh operation is performed to increase the oxygen concentration of the air inside the storage in the storage space 5.

[0178] As Figure 12 shown, in the seventh operation, the controller 180 sets the first valve 116 to the open state, sets the second valve 117 to the closed state, sets the bypass switching valve 123 to the second state, sets the first switching valve 136 to the first state, and sets the second switching valve 137 to the second state.

[0179] The outside air sucked into the air pump 110 from the first inflow pipe 111 is pressurized and then ejected from the air pump 110, and then flows into the bypass pipe 124. The outside air flowing into the first outflow pipe 131 from the bypass pipe 124 is supplied to the internal flow path 20 through the first supply pipe 141.

[0180] 〈Exhaust operation〉

[0181] The exhaust operation is an operation in which the air inside the storage is discharged to the outside of the transport container 1. This discharge operation is performed as needed during the execution of the first operation, the second operation, the fourth operation, the fifth operation, and the seventh operation.

[0182] During the exhaust operation, the controller 180 sets the exhaust valve 161 to the closed state. During the execution of the first operation, the second operation, the fourth operation, the fifth operation, and the seventh operation, the air pressure in the storage space 5 is higher than the air pressure outside the transport container 1 (i.e., the atmospheric pressure). That is to say, the storage space 5 is maintained at a positive pressure. Therefore, when the exhaust valve 161 is opened, the air inside the warehouse will be discharged to the outside of the transport container 1 through the ventilation exhaust pipe 160. During the execution of the exhaust operation, the air in the storage space 5 is gradually replaced by the air blown out from the first supply pipe 141.

[0183] - Features of the First Embodiment (1)-

[0184] In the warehouse air conditioning device 100 of the present embodiment, both the outside air flowing in the first inflow path 111 and the inside air flowing in the second inflow path 112 can flow into the separation module 200. In the separation module 200, the first air and the second air with different compositions are generated. In the warehouse air conditioning device 100 of the present embodiment, since the separation module 200 can process both the inside air and the outside air, the structure of the warehouse air conditioning device 100 is simplified.

[0185] - Features of the First Embodiment (2)-

[0186] In the warehouse air conditioning device 100 of the present embodiment, the outlet switching mechanism 135 changes the destinations of the first air and the second air. Therefore, the warehouse air conditioning device 100 of the present embodiment can switch between the operation of supplying the first air to the inside of the warehouse and discharging the second air to the outside, and the operation of discharging the first air to the outside and supplying the second air to the inside of the warehouse.

[0187] - Features of the First Embodiment (3)-

[0188] In the warehouse air conditioning device 100 of the present embodiment, both the outside air flowing in the first inflow path 111 and the inside air flowing in the second inflow path 112 are sent to the separation module 200 by one air pump 110. Therefore, compared with the case where air pumps are respectively provided in the first inflow pipe 111 and the second inflow pipe 112, the structure of the warehouse air conditioning device 100 is simplified.

[0189] - Features of the First Embodiment (4)-

[0190] In the in-store air conditioning device 100 of the present embodiment, the first valve 116 and the second valve 117 constituting the inlet switching mechanism are controlled by the controller 180. Moreover, by controlling the first valve 116 and the second valve 117 by the controller 180, switching is performed between the following states: the state in which outside air flows into the separation module 200, the state in which inside air flows into the separation module 200, and the state in which both outside air and inside air flow into the separation module 200.

[0191] - Variation of the First Embodiment -

[0192] A variation of the present embodiment will be described.

[0193] 〈First Variation〉

[0194] In the in-store air conditioning device 100 of the present embodiment, the first valve 116 and the second valve 117 may each be an electric valve whose opening degree can be adjusted. In this variation, by adjusting the opening degrees of the first valve 116 and the second valve 117 respectively, the ratio of the outside air and the inside air sucked into the air pump changes.

[0195] 〈Second Variation〉

[0196] In the in-store air conditioning device 100 of the present embodiment, the inlet switching mechanism 115 may also be constituted by a single three-way valve. Connected to the three-way valve constituting the inlet switching mechanism 115 are the outlet end of the first inflow pipe 111, the outlet end of the second inflow pipe 112, and the inlet end of the inflow main pipe 113. The three-way valve constituting the inlet switching mechanism 115 switches between the following states: a state in which the inflow main pipe 113 is in communication with both the first inflow pipe 111 and the second inflow pipe 112, a state in which the inflow main pipe 113 is in communication with the first inflow pipe 111 and is disconnected from the second inflow pipe 112, and a state in which the inflow main pipe 113 is in communication with the second inflow pipe 112 and is disconnected from the first inflow pipe 111.

[0197] 《Second Embodiment》

[0198] The transport container 1 of the present embodiment is a transport container in which the structure of the in-store air conditioning device 100 is changed based on the transport container 1 of the above-described first embodiment. Here, the differences between the in-store air conditioning device 100 of the present embodiment and the in-store air conditioning device 100 of the first embodiment will be described.

[0199] As Figure 13As shown, the in - store air - conditioning device 100 of the present embodiment includes an in - store air switching valve 165, an in - store air pipe 166, and an exhaust pipe 167. In addition, in the in - store air - conditioning device 100 of the present embodiment, the first valve 116, the second valve 117 that constitute the inlet switching mechanism 115, the exhaust pipe 160 for ventilation, and the exhaust valve 161 are omitted.

[0200] 〈Second inflow pipe〉

[0201] In the in - store air - conditioning device 100 of the present embodiment, the inlet end of the second inflow pipe 112 is connected to the in - store air switching valve 165. Similar to the first embodiment, the outlet end of the second inflow pipe 112 is connected to the inlet end of the inflow main pipe 113.

[0202] 〈In - store air pipe〉

[0203] The in - store air pipe 166 is a pipe that guides the in - store air to the in - store air switching valve 165. The in - store air pipe 166 constitutes an in - store air flow path.

[0204] The inlet end of the in - store air pipe 166 is located inside the partition wall 12 (in - store space). An air filter 112a is provided at the inlet end of the in - store air pipe 166. In the in - store air - conditioning device 100 of the present embodiment, the air filter 112a is not provided at the inlet end of the second inflow pipe 112, but at the inlet end of the in - store air pipe 166. The inlet end of the in - store air pipe 166 communicates with the in - store space via the air filter 112a. The outlet end of the in - store air pipe 166 is connected to the in - store air switching valve 165.

[0205] 〈Exhaust pipe〉

[0206] The exhaust pipe 167 is a pipe for leading the in - store air to the outside of the transportation container 1. The exhaust pipe 167 constitutes an exhaust flow path.

[0207] The inlet end of the exhaust pipe 167 is connected to the in - store air switching valve 165. The outlet end of the exhaust pipe 167 communicates with the outside of the partition wall 12 (out - of - store space).

[0208] 〈In - store air switching valve〉

[0209] The in - store air switching valve 165 is a three - way valve that constitutes a switching mechanism. As described above, the second inflow pipe 112, the in - store air pipe 166, and the exhaust pipe 167 are connected to the in - store air switching valve 165. The in - store air switching valve 165 switches between a first state and a second state. In the first state, it connects the in - store air pipe 166 to the second inflow pipe 112 and disconnects from the exhaust pipe 167. In the second state, it connects the in - store air pipe 166 to the exhaust pipe 167 and disconnects from the second inflow pipe 112.

[0210] - Operation of the in - store air - conditioning device -

[0211] The operation of the in - store air - conditioning device 100 will be described. The in - store air - conditioning device 100 performs various operations. Here, a part of the operations performed by the in - store air - conditioning device 100 will be described.

[0212] 〈First operation, fourth operation〉

[0213] The in - store air - conditioning device 100 of the present embodiment performs operations equivalent to the first operation (refer to Figure 6 ) and the fourth operation (refer to Figure 9 ) of the in - store air - conditioning device 100 of the first embodiment. Here, the differences between the first operation and the fourth operation performed by the in - store air - conditioning device 100 of the present embodiment and the first operation and the fourth operation performed by the in - store air - conditioning device 100 of the first embodiment will be described.

[0214] In the first operation and the fourth operation performed by the in - store air - conditioning device 100 of the present embodiment, the controller 180 sets the in - store air switching valve 165 to the first state. As a result, the in - store air pipe 166 is connected to the second inflow pipe 112 and disconnected from the exhaust pipe 167. The in - store air flowing in the in - store air pipe 166 flows into the inflow main pipe 113 through the second inflow pipe 112 and is sucked into the air pump 110 together with the outside air flowing into the inflow main pipe 113 from the first inflow pipe 111.

[0215] 〈Exhaust operation〉

[0216] The in - store air - conditioning device 100 of the present embodiment performs an exhaust operation. In the in - store air - conditioning device 100 of the present embodiment, the exhaust operation is performed as needed during the execution of operations equivalent to the second operation (refer to Figure 7 ), the fifth operation (refer to Figure 10 ), and the seventh operation (refer to Figure 12 ) of the in - store air - conditioning device 100 of the first embodiment.

[0217] In the exhaust operation performed by the in - store air - conditioning device 100 of the present embodiment, the controller 180 sets the in - store air switching valve 165 to the second state. As a result, the in - store air pipe 166 is connected to the exhaust pipe 167 and disconnected from the second inflow pipe 112. The states of the components of the in - store air - conditioning device 100 other than the in - store air switching valve 165 are the same as the states of the components when the in - store air - conditioning device 100 of the first embodiment performs the second operation, the fifth operation, and the seventh operation.

[0218] During the execution of the second operation, the fifth operation, and the seventh operation, the air pressure in the storage space 5 is higher than the air pressure outside the transport container 1 (i.e., the atmospheric pressure). That is to say, the storage space 5 is maintained at a positive pressure. Therefore, when the in-store air switching valve 165 is set to the second state, the in-store air sequentially passes through the in-store air pipe 166 and the exhaust pipe 167 and is discharged to the outside of the transport container 1. As a result, the air in the storage space 5 is gradually replaced by the air blown out from the first supply pipe 141.

[0219] - Features of the second embodiment -

[0220] In the in-store air conditioning device 100 of the present embodiment, the in-store air pipe 166 is used in both the operation of sending the in-store air to the air pump 110 and the operation of sending the in-store air to the exhaust pipe 167. In this way, in the in-store air conditioning device 100 of the present embodiment, a part of the pipe for sending the in-store air to the air pump 110 can be used as a flow path for discharging the in-store air to the outside of the transport container 1. Therefore, according to the present embodiment, the structure of the in-store air conditioning device 100 can be simplified.

[0221] - Variation of the second embodiment -

[0222] In the in-store air conditioning device 100 of the present embodiment, a first valve 116 may also be provided on the first inflow pipe 111. In this case, the first valve 116 and the in-store air switching valve 165 constitute an inlet switching mechanism 115.

[0223] 《Third Embodiment》

[0224] The transport container 1 of the present embodiment is a transport container in which the structure of the in-store air conditioning device 100 is changed on the basis of the transport container 1 of the above first embodiment. Here, the differences between the in-store air conditioning device 100 of the present embodiment and the in-store air conditioning device 100 of the first embodiment are described.

[0225] As Figure 14 shown, in the in-store air conditioning device 100 of the present embodiment, the composition adjustment unit 200 is composed of a PSA (Pressure Swing Adsorption) type gas separation device. The composition adjustment unit 200 separates the air to be treated into first air with a nitrogen concentration higher than that of the air to be treated and an oxygen concentration lower than that of the air to be treated, and second air with a nitrogen concentration lower than that of the air to be treated and an oxygen concentration higher than that of the air to be treated.

[0226] The composition adjustment unit 200 of the present embodiment includes a first adsorption cylinder 234, a second adsorption cylinder 235, a first operation switching valve 232, and a second operation switching valve 233. In addition, the in-store air conditioning device 100 of the present embodiment includes a pump unit 300 to replace the air pump 110 of the first embodiment.

[0227] The first adsorption cylinder 234, the second adsorption cylinder 235, the first operation switching valve 232, the second operation switching valve 233, and the pump unit 300 are housed in a unit housing (not shown). The unit housing for housing these components is provided outside (outside the store) the partition wall 12 of the transport refrigeration device 10.

[0228] 〈Pump Unit〉

[0229] The pump unit 300 includes a supply air pump 301, an exhaust air pump 302, and a drive motor 305. The supply air pump 301 and the exhaust air pump 302 respectively suck and eject air. The supply air pump 301 and the exhaust air pump 302 are connected to the drive shaft of a single drive motor 305. In the pump unit 300, both the supply air pump 301 and the exhaust air pump 302 are driven by a single drive motor 305.

[0230] The other end of the inflow main pipe 113 is connected to the suction port of the supply air pump 301. One end of the first connection pipe 121 is connected to the discharge port of the supply air pump 301. The supply air pump 301 pressurizes the air to be processed sucked from the inflow main pipe 113 and ejects the pressurized air to be processed into the first connection pipe 121. The supply air pump 301 sends the sucked air to the air supply section 110 of the composition adjustment unit 200.

[0231] A suction pipe 130 is connected to the suction port of the exhaust air pump 302. A first outflow pipe 131 is connected to the discharge port of the exhaust air pump 302. The exhaust air pump 302 ejects the first air sucked from the composition adjustment unit 200 through the suction pipe 130 into the first outflow pipe 131.

[0232] 〈Second Connection Pipe〉

[0233] The second connection pipe 122 of the present embodiment connects the bypass switching valve 123 to the first operation switching valve 232 and the second operation switching valve 233 of the composition adjustment unit 200. Similar to the first embodiment, one end of the second connection pipe 122 is connected to the bypass switching valve 123. The second connection pipe 122 branches into two branch pipes on the other end side, one branch pipe is connected to the first operation switching valve 232, and the other branch pipe is connected to the second operation switching valve 233.

[0234] 〈Suction Pipe〉

[0235] The suction pipe 130 is a pipe that guides the gas flowing out from the first adsorption cylinder 234 and the second adsorption cylinder 235 to the exhaust pump 320. One end of the suction pipe 130 is connected to the suction port of the exhaust pump 302. The suction pipe 130 branches into two branch pipes on the other end side, one branch pipe is connected to the first operation switching valve 232, and the other branch pipe is connected to the second operation switching valve 233.

[0236] 〈First outflow pipe〉

[0237] The inlet end of the first outflow pipe 131 of the present embodiment is connected to the discharge port of the exhaust pump 302. Similar to the first embodiment, the outlet end of the first outflow pipe 131 is connected to the first switching valve 136.

[0238] The first outflow pipe 131 guides the first air ejected by the exhaust pump 302 to the first switching valve 136.

[0239] The first outflow pipe 131 is the first outflow path for the first air flowing out from the composition adjustment unit 200.

[0240] 〈Operation switching valve〉

[0241] The first operation switching valve 232 and the second operation switching valve 233 are respectively switching valves having three valve ports. The first operation switching valve 232 and the second operation switching valve 233 are respectively configured to switch between a first state and a second state. In the first state, the first valve port communicates with the second valve port and is disconnected from the third valve port. In the second state, the first valve port communicates with the third valve port and is disconnected from the second valve port.

[0242] The first valve port of the first operation switching valve 232 is connected to one end of the first adsorption cylinder 234. In addition, a branch pipe of the second connection pipe 122 is connected to the second valve port of the first operation switching valve 232, and a branch pipe of the suction pipe 130 is connected to the third valve port of the first operation switching valve 232. The first operation switching valve 232 switches between a state in which the first adsorption cylinder 234 is connected to the air supply pump 301 and a state in which the first adsorption cylinder 234 is connected to the exhaust pump 302.

[0243] The first valve port of the second operation switching valve 233 is connected to one end of the second adsorption cylinder 235. In addition, a branch pipe of the second connection pipe 122 is connected to the second valve port of the second operation switching valve 233, and a branch pipe of the suction pipe 130 is connected to the third valve port of the second operation switching valve 233. The second operation switching valve 233 switches between a state in which the second adsorption cylinder 235 is connected to the air supply pump 301 and a state in which the second adsorption cylinder 235 is connected to the exhaust pump 302.

[0244] 〈Adsorption cylinder〉

[0245] The first adsorption cylinder 234 and the second adsorption cylinder 235 are respectively components including a cylindrical container with both ends closed and an adsorbent filled in the container.

[0246] The adsorbents filled in the respective adsorption cylinders 234 and 235 have the following properties: they adsorb nitrogen and water (water vapor) in the air to be treated under a pressurized state where the pressure is higher than the atmospheric pressure, and desorb nitrogen and water under a depressurized state where the pressure is lower than the atmospheric pressure. As an example of an adsorbent having the above properties, zeolite can be cited. Zeolite is a porous body with micropores, and the pore diameter of the micropores is smaller than the molecular diameter of nitrogen molecules (3.0 Å) and larger than the molecular diameter of oxygen molecules (2.8 Å). It is assumed that the adsorbents provided in the adsorption cylinders 234 and 235 adsorb nitrogen and water (water vapor) as components of the air to be treated.

[0247] 〈Second outflow pipe〉

[0248] The second outflow pipe 132 of the present embodiment branches into two branch pipes on the inlet end side. One branch pipe is connected to the other end of the first adsorption cylinder 234, and the other branch pipe is connected to the other end of the second adsorption cylinder 235. A check valve 261 is provided on each of the branch pipes of the second outflow pipe 132. Each check valve 261 allows air to flow along the direction flowing out from the corresponding adsorption cylinders 234 and 235, and blocks the air from flowing in the opposite direction.

[0249] Similar to the first embodiment, the outlet end of the second outflow pipe 132 is connected to the second switching valve 137. The second outflow pipe 132 is a second outflow path for the second air flowing out from the composition adjustment unit 200.

[0250] A check valve 262 and an orifice plate 263 are provided at the converging portion of the second outflow pipe 132. The check valve 262 is arranged at a position closer to the other end side of the second outflow pipe 132 relative to the orifice plate 263. This check valve 262 allows air to flow toward the other end of the second outflow pipe 132 and blocks the air from flowing in the opposite direction.

[0251] 〈Release pipe〉

[0252] Release pipes 250 are connected to the respective branch pipes of the second outflow pipe 132. One end of the release pipe 250 is connected to the branch pipe connected to the first adsorption cylinder 234, and the other end is connected to the branch pipe connected to the second adsorption cylinder 235. One end of the release pipe 250 is connected between the first adsorption cylinder 234 and the check valve 261. The other end of the release pipe 250 is connected between the second adsorption cylinder 235 and the check valve 261.

[0253] A release valve 251 is provided on the release pipe 250. The release valve 251 is a switching valve composed of a solenoid valve. When equalizing the pressure of the first adsorption cylinder 234 and the second adsorption cylinder 235, the release valve 251 is opened. In addition, an orifice plate 252 is provided on each side of the release valve 251 on the release pipe 250.

[0254] 〈Controller〉

[0255] Similar to the first embodiment, the controller 180 of this embodiment controls the constituent devices of the in-store air conditioning device 100. The controller 180 controls the pump unit 300, the first operation switching valve 232, and the second operation switching valve 233.

[0256] -Operation actions of the in-store air conditioning device-

[0257] The operation actions of the in-store air conditioning device 100 will be described. Similar to the first embodiment, the in-store air conditioning device 100 of this embodiment performs a plurality of operation actions including the first to seventh operations.

[0258] In each of the first to sixth operations, the in-store air conditioning device 100 performs an action for separating the air to be processed into first air and second air in the composition adjustment unit 200. Specifically, the in-store air conditioning device 100 alternately performs the first separation action and the second separation action at every prescribed switching time Ts and repeats them. The switching time Ts is set to 14 seconds, for example. The controller 180 controls the first operation switching valve 232 and the second operation switching valve 233 so that the first separation action and the second separation action are alternately performed. In each separation action, in the composition adjustment unit 200, the air to be processed is separated into first air and second air.

[0259] 〈First separation action〉

[0260] As Figure 15 shown, in the first separation action, the first operation switching valve 232 is set to the first state, and the second operation switching valve 233 is set to the second state. In addition, in the first separation action, the pump unit 300 operates to perform a pressurization action on the first adsorption cylinder 234 and a depressurization action on the second adsorption cylinder 235. It should be noted that Figure 15 represents the first separation action in the first operation.

[0261] The air supply pump 301 sucks in the air to be processed from the inflow main pipe 113, pressurizes it, and supplies the pressurized air to be processed to the first adsorption cylinder 234. In the first adsorption cylinder 234, nitrogen and water (water vapor) contained in the supplied air to be processed are adsorbed by the adsorbent. As a result, in the first adsorption cylinder 234, an oxygen-rich gas with a nitrogen concentration lower than that of the air to be processed and an oxygen concentration higher than that of the air to be processed is generated. This oxygen-rich gas is the second air. The oxygen-rich gas (second air) flows from the first adsorption cylinder 234 into the second outflow pipe 132.

[0262] On the other hand, the exhaust pump 302 sucks out the gas from the second adsorption cylinder 235. In the second adsorption cylinder 235, the internal pressure decreases, and nitrogen and water are released from the adsorbent. As a result, in the second adsorption cylinder 235, a nitrogen-rich gas with a nitrogen concentration higher than that of the air to be processed and an oxygen concentration lower than that of the air to be processed is generated. This nitrogen-rich gas is the first air. The nitrogen-rich gas (first air) flows out of the second adsorption cylinder 235 and is sucked into the exhaust pump 302 through the suction pipe 130. The exhaust pump 302 pressurizes the sucked nitrogen-rich gas (first air) and ejects it toward the first outflow pipe 131.

[0263] 〈Second separation operation〉

[0264] As Figure 16 shown, in the second separation operation, the first operation switching valve 232 is set to the second state, and the second operation switching valve 233 is set to the first state. In addition, in the second separation operation, the pump unit 300 operates to perform a decompression operation on the first adsorption cylinder 234 and a pressurization operation on the second adsorption cylinder 235. It should be noted that Figure 16 represents the second separation operation during the first operation.

[0265] The air supply pump 301 sucks in the air to be processed from the inflow main pipe 113, pressurizes it, and supplies the pressurized air to be processed to the second adsorption cylinder 235. In the second adsorption cylinder 235, nitrogen and water (water vapor) contained in the supplied air to be processed are adsorbed by the adsorbent. As a result, in the second adsorption cylinder 235, an oxygen-rich gas with a nitrogen concentration lower than that of the air to be processed and an oxygen concentration higher than that of the air to be processed is generated. This oxygen-rich gas is the second air. The oxygen-rich gas (second air) flows from the second adsorption cylinder 235 into the second outflow pipe 132.

[0266] On the other hand, the exhaust pump 302 sucks the gas from the first adsorption cylinder 234. Inside the first adsorption cylinder 234, the pressure therein decreases, and nitrogen and water are released from the adsorbent. As a result, in the first adsorption cylinder 234, a nitrogen-rich gas with a nitrogen concentration higher than that of the air to be treated and an oxygen concentration lower than that of the air to be treated is generated. This nitrogen-rich gas is the first air. The nitrogen-rich gas (first air) flows out of the first adsorption cylinder 234 and is sucked into the exhaust pump 302 through the suction pipe 130. The exhaust pump 302 pressurizes the sucked nitrogen-rich gas (first air) and ejects it toward the first outflow pipe 131.

[0267] 《Other Embodiments》

[0268] Regarding the transport container 1 and the in-store air conditioning device 100 of the above-described first embodiment and second embodiment, the following modification examples can also be applied. It should be noted that the following modification examples can be appropriately combined or replaced as long as the functions of the transport container 1 and the in-store air conditioning device 100 are not impaired.

[0269] 〈First Modification Example〉

[0270] The in-store air conditioning device 100 of the above-described first embodiment or second embodiment may include a fan as the air supply unit instead of the air pump 110. The fan constituting the air supply unit blows the air sucked from one or both of the first inflow pipe 111 and the second inflow pipe 112 toward the separation module 200.

[0271] 〈Second Modification Example〉

[0272] The transport container 1 of the above-described embodiments can also be used for land transportation. In this case, the transport container 1 is transported by a land transportation means such as a vehicle. Specifically, the transport container 1 is mounted on a trailer.

[0273] The embodiments and modification examples have been described above, but it can be understood that various changes can be made to the embodiments and specific circumstances without departing from the gist and scope of the claims. In addition, as long as the functions of the object of the present disclosure are not impaired, the above-described embodiments and modification examples can be appropriately combined and replaced. In addition, the words "first" and "second" in the specification and claims are only used to distinguish the sentences containing these words, and do not limit the number or order of these sentences.

[0274] -Industrial Applicability-

[0275] In summary, the present disclosure is useful for in-store air conditioning devices, refrigeration devices, and transport containers.

[0276] -Symbol Explanation-

[0277] 1 Transport container

[0278] 2 Container body (storage)

[0279] 10 Refrigeration unit for transportation (refrigeration unit)

[0280] 30 Refrigerant circuit

[0281] 100 In - store air - conditioning device

[0282] 110 Air pump (air supply part)

[0283] 111 First inflow pipe (first inflow path)

[0284] 112 Second inflow pipe (second inflow path)

[0285] 115 Inlet switching mechanism

[0286] 116 First valve

[0287] 117 Second valve

[0288] 131 First outflow pipe (first outflow path)

[0289] 132 Second outflow pipe (second outflow path)

[0290] 135 Outlet switching mechanism

[0291] 165 In - store air switching valve (switching mechanism)

[0292] 166 In - store air pipe (in - store air flow path)

[0293] 167 Exhaust pipe (exhaust flow path)

[0294] 180 Controller

[0295] 200 Separation module (composition adjustment part)

Claims

1. An in-store air conditioning device (100) that adjusts the composition of the in-store air inside the storage store (2), characterized in that: The in-library air conditioning device (100) includes a composition adjustment unit (200), a first inflow path (111), a second inflow path (112), a first outflow path (131), a second outflow path (132), an outlet switching mechanism (135), a first valve (116), a second valve (117), and a controller (180). The composition adjustment unit (200) separates the incoming air to be processed into first air and second air with different compositions. The first inflow path (111) allows the air outside the storage chamber (2) to flow toward the composition adjustment unit (200). The second inflow path (112) allows the air inside the chamber to flow toward the composition adjustment unit (200). The first outflow path (131) allows the first air flowing out from the composition adjustment unit (200) to flow. The second outflow path (132) allows the second air flowing out from the composition adjustment unit (200) to flow. The outlet switching mechanism (135) switches between the following states: a state where the first outflow path (131) communicates with the inside of the storage chamber (2) and the second outflow path (132) communicates with the outside of the storage chamber (2); a state where the second outflow path (132) communicates with the inside of the storage chamber (2) and the first outflow path (131) communicates with the outside of the storage chamber (2). The first valve (116) is provided on the first inflow path (111). The second valve (117) is provided on the second inflow path (112). The controller (180) controls the first valve (116) and the second valve (117) to switch between the following states: a first state where the first valve (116) is in an open state and the second valve (117) is in a closed state; a second state where the first valve (116) is in a closed state and the second valve (117) is in an open state; and a third state where both the first valve (116) and the second valve (117) are in open states. The first state is a state where the air to be processed composed of the air outside the chamber is supplied to the composition adjustment unit (200). The second state is a state where the air to be processed composed of the air inside the chamber is supplied to the composition adjustment unit (200). The third state is a state where the air to be processed, which is a mixture of the air outside the chamber and the air inside the chamber, is supplied to the composition adjustment unit (200).

2. An in-store air conditioning device (100) that adjusts the composition of the in-store air inside the storage store (2), characterized in that: The in-library air conditioning device (100) includes a composition adjustment unit (200), a first inflow path (111), a second inflow path (112), a first outflow path (131), a second outflow path (132), an outlet switching mechanism (135), and an inlet switching mechanism (115). The composition adjustment unit (200) separates the incoming air to be processed into first air and second air with different compositions. The first inflow path (111) allows the air outside the storage chamber (2) to flow toward the composition adjustment unit (200). The second inflow path (112) allows the air inside the reservoir to flow towards the composition adjustment unit (200). The first outflow path (131) allows the first air flowing out from the composition adjustment unit (200) to flow. The second outflow path (132) allows the second air flowing out from the composition adjustment unit (200) to flow. The outlet switching mechanism (135) switches between the following states: a state in which the first outflow path (131) communicates with the inside of the storage reservoir (2) and the second outflow path (132) communicates with the outside of the storage reservoir (2); a state in which the second outflow path (132) communicates with the inside of the storage reservoir (2) and the first outflow path (131) communicates with the outside of the storage reservoir (2). The inlet switching mechanism (115) switches between the following states: a first state in which the composition adjustment unit (200) communicates with the first inflow path (111) and is disconnected from the second inflow path (112); a second state in which the composition adjustment unit (200) communicates with the second inflow path (112) and is disconnected from the first inflow path (111); and a third state in which the composition adjustment unit (200) communicates with both the first inflow path (111) and the second inflow path (112). The first state is a state in which the air to be processed, which is composed of the air outside the reservoir, is supplied to the composition adjustment unit (200). The second state is a state in which the air to be processed, which is composed of the air inside the reservoir, is supplied to the composition adjustment unit (200). The third state is a state in which the air to be processed, which is air mixed from the air outside the reservoir and the air inside the reservoir, is supplied to the composition adjustment unit (200).

3. The in-store air conditioning device (100) according to claim 1 or 2, characterized in that: The in - reservoir air conditioning device (100) includes a gas supply unit (110), and the gas supply unit (110) sends the air inhaled from the first inflow path (111) and the second inflow path (112) to the composition adjustment unit (200).

4. The in-store air conditioning device (100) according to claim 1, characterized in that: The first valve (116) and the second valve (117) are respectively regulating valves with variable opening degrees.

5. The in-store air conditioning device (100) according to claim 1 or 2, characterized in that: The in - reservoir air conditioning device (100) includes a switching mechanism (165), and the switching mechanism (165) switches between the following states: a state in which the air inside the reservoir is sent to the second inflow path (112); a state in which the air inside the reservoir is discharged to the outside of the storage reservoir (2).

6. The in-store air conditioning device (100) according to claim 5, characterized in that: The in - reservoir air conditioning device (100) includes an in - reservoir air flow path (166) and an exhaust flow path (167). One end of the in - reservoir air flow path (166) communicates with the inside of the storage reservoir (2). One end of the exhaust flow path (167) communicates with the outside of the storage reservoir (2). The switching mechanism (165) is a three-way valve, to which the second inflow path (112), the in-store air flow path (166), and the exhaust flow path (167) are connected. The switching mechanism (165) switches between the following states: a state in which the in-store air flow path (166) communicates with the second inflow path (112), and a state in which the in-store air flow path (166) communicates with the exhaust flow path (167).

7. The in-store air conditioning device (100) according to any one of claims 1, 2, 4, and 6, characterized in that: The composition adjustment unit (200) separates the air to be processed into the first air and the second air. The nitrogen concentration of the first air is higher than that of the air to be processed, and the oxygen concentration is lower than that of the air to be processed. The nitrogen concentration of the second air is lower than that of the air to be processed, and the oxygen concentration is higher than that of the air to be processed.

8. The in-store air conditioning device (100) according to claim 3, characterized in that: The composition adjustment unit (200) separates the air to be processed into the first air and the second air. The nitrogen concentration of the first air is higher than that of the air to be processed, and the oxygen concentration is lower than that of the air to be processed. The nitrogen concentration of the second air is lower than that of the air to be processed, and the oxygen concentration is higher than that of the air to be processed.

9. The in-store air conditioning device (100) according to claim 5, characterized in that: The composition adjustment unit (200) separates the air to be processed into the first air and the second air. The nitrogen concentration of the first air is higher than that of the air to be processed, and the oxygen concentration is lower than that of the air to be processed. The nitrogen concentration of the second air is lower than that of the air to be processed, and the oxygen concentration is higher than that of the air to be processed.

10. A refrigeration device, characterized in that: The refrigeration device includes the in-store air conditioning device (100) according to any one of claims 1 to 9, and a refrigerant circuit (30) that performs a refrigeration cycle to adjust the temperature inside the storage chamber (2).

11. A shipping container, characterized in that: The transport container includes the refrigeration device (10) according to claim 10, and a container body that is provided with the refrigeration device (10) and constitutes the storage chamber.

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