Storage device

Abstract

To provide a storage device that can appropriately store articles that should be stored at a low temperature, and articles that should be prevented from being stored at a low temperature, without complicating a structure of the storage device.SOLUTION: A storage device comprises a cooling storage box, an ordinary temperature storage box, and a refrigerating device for cooling the inside of the cooling storage box. The refrigerating device comprises a compressor for compressing an introduced refrigerant, a heat dissipation heat exchange part for cooling the refrigerant compressed by the compressor, and a cooler for generating cooling air for cooling the inside of the cooling storage box by heat exchange using the refrigerant cooled by the heat dissipation heat exchange part, and is constituted so that the refrigerant heat-exchanged in the cooler is introduced into the compressor. The heat dissipation heat exchange part comprises a first heat dissipation heat exchanger for cooling the refrigerant by heat exchange, and a second heat dissipation heat exchanger for cooling the refrigerant by heat exchange, and increasing a temperature in the ordinary temperature storage box by heat obtained from the refrigerant.SELECTED DRAWING: Figure 1

Description

Technical Field

[0007]

[0001] This disclosure relates to a storage device.

Background Art

[0002] Conventionally, a storage device provided in a store, outdoors, etc. and used for delivering articles such as food has been known (see, for example, Patent Document 1).

[0003] The food product terminal (storage device) of Patent Document 1 has two zones with different set temperatures. One zone is set to -18°C for storing frozen foods, and the other zone is set to +2°C for storing dairy products, etc.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the food product terminal of Patent Document 1, articles that should avoid storage at low temperatures cannot be stored. Therefore, for example, it is conceivable to provide a zone (room - temperature storage zone) for storing articles at room temperature at a position facing the two zones with different set temperatures.

[0006] However, in a configuration where a room - temperature storage zone is provided in the food product terminal of Patent Document 1, for example, when the food product terminal is installed outdoors, the temperature in the room - temperature storage zone in winter may drop below 0°C, and there is a risk that articles that should avoid storage at low temperatures cannot be properly stored. To prevent such a problem, it is conceivable to arrange a heat source such as a heater that is only used for heating the room - temperature storage zone, but another problem occurs that the configuration of the food product terminal becomes complicated.

[0007] This disclosure aims to solve the above-mentioned problems and to provide a storage device that can appropriately store articles that should be stored at low temperatures and articles that should not be stored at low temperatures without complicating the configuration of the storage device. [Means for solving the problem]

[0008] The storage device of this disclosure comprises a cooling storage cabinet for storing articles at a cool temperature, a room temperature storage cabinet for storing articles without cooling, and a refrigeration device for cooling the inside of the cooling storage cabinet. The refrigeration device comprises a compressor for compressing an introduced refrigerant, a heat exchange unit for cooling the refrigerant compressed by the compressor, and a cooler that generates cooling air for cooling the inside of the cooling storage cabinet by heat exchange using the refrigerant cooled in the heat exchange unit. The refrigerant that has undergone heat exchange in the cooler is introduced into the compressor. The heat exchange unit comprises a first heat exchanger for cooling the refrigerant by heat exchange, and a second heat exchanger for cooling the refrigerant by heat exchange and raising the temperature inside the room temperature storage cabinet by the heat obtained from the refrigerant. [Effects of the Invention]

[0009] According to the storage device of this disclosure, articles that should be stored at low temperatures and articles that should not be stored at low temperatures can be properly stored without complicating the configuration of the storage device. [Brief explanation of the drawing]

[0010] [Figure 1] Longitudinal cross-sectional view of the storage device according to the first embodiment [Figure 2] Block diagram of the refrigeration system according to the first embodiment [Figure 3] Flowchart of the temperature control process performed by the storage device according to the first to third embodiments. [Figure 4A] Diagram illustrating normal control according to the first embodiment [Figure 4B] Diagram illustrating low-temperature control according to the first embodiment [Figure 5] Longitudinal cross-sectional view of the storage device according to the second and third embodiments. [Figure 6] Block diagram of the refrigeration system according to the second embodiment [Figure 7] Block diagram of a refrigeration system according to the third embodiment. [Modes for carrying out the invention]

[0011] [First Embodiment] A first embodiment of this disclosure will be described.

[0012] <Configuration of the storage device> First, let's explain the configuration of the storage device. Figure 1 is a longitudinal cross-sectional view of the storage device. The front side is the side that the user of the storage device faces when items are being placed in or taken out of the storage device, and the rear side is the opposite side of the front side. The right side, left side, top side, and bottom side are the sides that the user sees from the perspective of the transport device when placing items in or taking them out of the storage device.

[0013] The storage device 1 shown in Figure 1 is installed, for example, inside or around a train station, inside or around a commercial facility such as a convenience store or supermarket, inside or around a factory or office building, or in a residential area (specifically, near the entrance of an apartment building or detached house). The storage device 1 is used, for example, when goods Z purchased through online shopping or online supermarkets are indirectly transferred between the delivery company or store and the purchaser. Goods Z are, for example, daily necessities, fresh food, and frozen food.

[0014] The storage device 1 stores articles Z at room temperature, refrigeration temperature (e.g., +1°C to +5°C), and freezing temperature (e.g., approximately -20°C). In this disclosure, "room temperature" refers to, for example, approximately +20°C, and means a temperature range for storing articles that do not require or should be stored at low temperatures. The storage device 1 comprises a main body 2, an air curtain generating unit 3, and a conveying device 4.

[0015] The main body part 2 includes a housing 21. The housing 21 is formed in a rectangular parallelepiped box shape by an upper wall 211 having heat insulation properties, a bottom wall (not shown), a front wall 212, a rear wall 213, and left and right side walls 214. The housing 21 surrounds a space partitioned into a first article storage space R1 and a second article storage space R2 by an air curtain to be described later.

[0016] The first article storage space R1 is located at the rear part inside the housing 21. It is possible to consider that a virtual freezer 22 and a refrigerator 23 are arranged in the first article storage space R1. Of course, the actual hardware freezers 22 and refrigerators 23 may be arranged.

[0017] The freezer 22 is an example of the cooling storage of the present disclosure and stores the article Z at a freezing temperature. The freezer 22 is located above the first article storage space R1. The freezer 22 includes, for example, three shelves 221 arranged in the vertical direction. Each shelf 221 is arranged so as to span the left and right side walls 214. Each shelf 221 is configured to be able to place the storage box 20. The storage box 20 is configured to be able to take in and out the article Z from above into the inside of the storage box 20. The upper opening 22A, which is the front opening of the freezer 22, is not blocked. The storage box 20 is taken in and out of the inside of the freezer 22 through the upper opening 22A.

[0018] The refrigerator 23 is an example of the cooling storage of the present disclosure and stores the article Z at a refrigerating temperature. The refrigerator 23 is located at the lower part of the first article storage space R1, that is, below the freezer 22. The refrigerator 23 includes, for example, four shelves 231 arranged in the vertical direction. Each shelf 231 is arranged so as to span the left and right side walls 214 and is configured to be able to place the storage box 20. The lower opening 23A, which is the front opening of the refrigerator 23, is not blocked. The storage box 20 is taken in and out of the inside of the refrigerator 23 through the lower opening 23A.

[0019] In addition, an upper rear plate 222, an intermediate plate-like member 223, a rear plate-like member 224, and a lower plate-like member 232 are further provided inside the housing 21.

[0020] The upper rear plate 222 is provided so as to block a portion of the rear-side opening surrounded by the upper wall 211, the left and right side walls 214, and the bottommost shelf 221, excluding the upper-end portion.

[0021] The intermediate plate-like member 223 is disposed so as to span the left and right side walls 214 at a position a predetermined distance below the bottommost shelf 221. The intermediate plate-like member 223 is arranged such that its front end is located in front of the front end of the shelf 221, and its rear end is located approximately in the middle between the upper rear plate 222 and the rear wall 213. An extension portion 223A extending upward is formed at the front end of the intermediate plate-like member 223. The upper end of the extension portion 223A is located below the bottommost shelf 221 and substantially directly below the rear end of a duct protrusion 321B described later.

[0022] A rear plate-like member 224 extending upward from the rear end is provided at the rear end of the intermediate plate-like member 223. The rear plate-like member 224 is disposed so as to span the left and right side walls 214.

[0023] The lower plate-like member 232 is disposed so as to span the left and right side walls 214 at a position a predetermined distance below the bottommost shelf 231. The lower plate-like member 232 is arranged such that its front end is substantially directly below the front end of the duct protrusion 321B, and its rear end is fixed to the rear wall 213.

[0024] The second article storage space R2 is located in the front-side portion inside the housing 21. It is possible to consider that a virtual normal-temperature storage 24 is arranged in the second article storage space R2. Of course, a normal-temperature storage 24 as actual hardware may be arranged.

[0025] The ambient temperature storage unit 24 stores the articles Z at ambient temperature (higher than the refrigeration and freezing temperatures). The ambient temperature storage unit 24 is located away from the freezer storage unit 22 and the refrigerated storage unit 23, separated by the transport space R3. The transport space R3 is part of the second article storage space R2 and is the space where the transport device 4, which will be described later, is located.

[0026] The ambient temperature storage unit 24 is equipped with six shelves 241 arranged vertically. Each shelf 241 is positioned to span the left and right side walls 214 and is configured to hold storage boxes 20. The opening 24A at the rear of the ambient temperature storage unit 24 is not closed. The storage boxes 20 are inserted into and removed from the ambient temperature storage unit 24 through the opening 24A.

[0027] Furthermore, an operation panel 25, operated by the user, is provided on the front wall 212 of the housing 21. A front opening 212A is formed in the portion of the front wall 212 located below the ambient temperature storage compartment 24. An entry / exit section 26 is provided around the front opening 212A. The entry / exit section 26 includes an openable / closable door 261 and a mounting section 262 on which a storage box 20 can be placed.

[0028] Furthermore, a second heat exchanger 513B, which constitutes the refrigeration device 5 (see Figure 2) described later, is located in the second item storage space R2. The second heat exchanger 513B is located, for example, below the mounting section 262 in the second item storage space R2, that is, below the ambient temperature storage unit 24. Multiple second heat exchangers 513B may be located. The second heat exchanger 513B raises the temperature of the ambient temperature storage unit 24, as will be described in more detail later.

[0029] The air curtain generation unit 3 generates a first air curtain C1 and a second air curtain C2. The first air curtain C1 cools the inside of the refrigerated storage unit 23 by covering the lower opening 23A, bringing the temperature of the refrigerated storage unit 23 to the refrigeration temperature. The second air curtain C2 cools the inside of the freezer storage unit 22 by covering the upper opening 22A, bringing the temperature of the freezer storage unit 22 to the freezing temperature. The air curtain generation unit 3 comprises a second air curtain generation unit 31 and a first air curtain generation unit 32.

[0030] The second air curtain generation unit 31 comprises a second flow path 311, a second heat exchanger 519 constituting the refrigeration device 5, and a second fan 312.

[0031] The second flow path 311 is configured to circulate the second air A2 used to generate the second air curtain C2 and the air constituting the second air curtain C2 to the rear side, the top side, the front side of the upper opening 22A of the freezer storage unit 22, and between the freezer storage unit 22 and the refrigerator storage unit 23.

[0032] The second heat exchanger 519 is positioned on the intermediate plate-shaped member 223, that is, in the portion between the freezer storage compartment 22 and the refrigerated storage compartment 23 within the second flow path 311. The second heat exchanger 519 cools the air surrounding it by heat exchange to generate second air A2. Second air A2 is an example of the cooling air of this disclosure. The temperature of second air A2 is, for example, -25°C.

[0033] The second fan 312 is positioned in front of the second heat exchanger 519 on the intermediate plate-shaped member 223 and sends the second air A2 obtained by heat exchange in the second heat exchanger 519 to the rear.

[0034] The first air curtain generating unit 32 comprises a first flow path 321, a first heat exchanger 517 constituting the refrigeration device 5, and a first fan 322.

[0035] The first flow path 321 is configured to circulate the first air A1 used to generate the first air curtain C1 and the air constituting the first air curtain C1 between the front side of the upper opening 22A and the lower opening 23A, the lower side of the refrigerated storage unit 23, the rear side of the refrigerated storage unit 23 and the freezer storage unit 22, and the upper side of the freezer storage unit 22.

[0036] The upper duct 321A, which partitions the upper part of the freezer storage compartment 22 in the first flow path 321, is positioned on the upper wall 211. The front end of the upper duct 321A is bent downward. The portion of the front end of the upper duct 321A that extends downward is inserted into an opening formed in the upper wall 211 and forms a duct projection 321B that protrudes downward from the upper wall 211. The opening at the rear end of the upper duct 321A is connected to the opening at the upper end of a cylindrical portion formed by the rear wall 213, the rear plate-like member 224, and the left and right side walls 214.

[0037] The first heat exchanger 517 is located inside the upper duct 321A. The first heat exchanger 517 cools the air surrounding it by heat exchange to generate first air A1. First air A1 is an example of the cooling air of this disclosure. The temperature of first air A1 is higher than the refrigeration temperature. The temperature of first air A1 is such that the temperature of the mixture of first air A1 and second air A2 reaches the refrigeration temperature, for example, +15°C. Note that first air A1 may be heated air depending on the set temperature of the freezer 22, the set temperature of the refrigerator 23, and the ambient temperature.

[0038] The first fan 322 is positioned behind the first heat exchanger 517 in the upper duct 321A and sends the first air A1 obtained by heat exchange in the first heat exchanger 517 forward.

[0039] Furthermore, the first air curtain C1 and the second air curtain C2 have the function of dividing the inside of the housing 21 into a first item storage space R1 and a second item storage space R2.

[0040] The conveying device 4 is positioned in the conveying space R3 and holds items Z placed in from the loading / unloading section 26 with its item holding section 41. By moving the item holding section 41 using the moving mechanism 42, the conveying device 4 performs loading processing to place items Z into the frozen storage 22, refrigerated storage 23, or ambient temperature storage 24. The conveying device 4 also holds items Z stored in the frozen storage 22, refrigerated storage 23, or ambient temperature storage 24 with its item holding section 41 and performs loading processing to remove items Z from the loading / unloading section 26 by moving the item holding section 41 using the moving mechanism 42.

[0041] Figure 2 is a block diagram of the refrigeration system. As shown in Figure 2, the storage device 1 further comprises a refrigeration system 5. The refrigeration system 5 cools the freezer storage compartment 22 and the refrigerator storage compartment 23 located inside the first article storage space R1. The refrigeration system 5 comprises various components constituting the refrigeration circuit 51, a temperature sensor 54, and a control unit 55.

[0042] The refrigeration circuit 51 generates first air A1 to raise the temperature of the refrigerated storage compartment 23 to the refrigeration temperature, second air A2 to raise the temperature of the freezer storage compartment 22 to the freezing temperature, and heated air B to raise the temperature of the ambient temperature storage compartment 24 by exchanging heat with the refrigerant. The refrigeration circuit 51 includes a compressor 511, a first three-way valve 512, a heat dissipation heat exchange unit 513, a fan 514 for the heat dissipation heat exchange unit, a second three-way valve 515, a first throttle unit 516, the first heat exchanger 517 described above, a second throttle unit 518, and the second heat exchanger 519 described above.

[0043] The compressor 511 is, for example, a rotary compressor. One end of the piping 521 is connected to the compressor 511. The compressor 511 compresses the refrigerant and sends it to the piping 521.

[0044] The first pipe connection, second pipe connection, and third pipe connection of the first three-way valve 512 are connected to the other end of pipe 521, one end of pipe 522, and one end of pipe 523, respectively.

[0045] The heat dissipation heat exchange section 513 comprises a first heat dissipation heat exchanger 513A and a second heat dissipation heat exchanger 513B.

[0046] The first heat exchanger 513A is composed of an air-cooled heat exchanger having heat dissipation fins (not shown), for example. Alternatively, the first heat exchanger 513A may be composed of a water-cooled heat exchanger. The other end of pipe 522 and one end of pipe 524 are connected to the first heat exchanger 513A. The first heat exchanger 513A exchanges heat between the refrigerant compressed by the compressor 511 and the air surrounding the first heat exchanger 513A, and sends the cooled refrigerant after the heat exchange to pipe 524.

[0047] The second heat exchanger 513B is composed of an air-cooled heat exchanger having, for example, heat dissipation fins (not shown). The other end of piping 523 and one end of piping 525 are connected to the second heat exchanger 513B. The second heat exchanger 513B exchanges heat between the refrigerant compressed by the compressor 511 and the air present below the ambient temperature storage unit 24 (around the second heat exchanger 513B). After the heat exchange, the cooled refrigerant is sent to piping 525, and heated air B is generated by warming the air present below the ambient temperature storage unit 24. As this heated air B flows into the ambient temperature storage unit 24, the temperature of the ambient temperature storage unit 24 rises.

[0048] The heat exchange fan 514 improves the cooling efficiency of the first heat exchanger 513A by blowing air onto it. However, if the first heat exchanger 513A is a water-cooled heat exchanger, the heat exchange fan 514 does not need to be provided.

[0049] The first pipe connection, second pipe connection, and third pipe connection of the second three-way valve 515 are connected to the other end of pipe 524, the other end of pipe 525, and one end of pipe 526, respectively.

[0050] The first throttling section 516 is, for example, an electric expansion valve. The other end of the piping 526 and one end of the piping 527 are connected to the first throttling section 516. The first throttling section 516 restricts the flow of the refrigerant cooled in the heat exchange section 513 and sends it to the piping 527.

[0051] The other end of piping 527 and one end of piping 528 are connected to the first heat exchanger 517. The first heat exchanger 517 exchanges heat between the refrigerant restricted at the first throttling section 516 and the air surrounding the first heat exchanger 517 to generate first air A1, and sends the heat-exchanged refrigerant to piping 528.

[0052] The second throttling section 518 is, for example, an electric expansion valve. The other end of the piping 528 and one end of the piping 529 are connected to the second throttling section 518. The second throttling section 518 restricts the flow of the refrigerant that has undergone heat exchange in the first heat exchanger 517 and sends it to the piping 529.

[0053] The other end of piping 529 and one end of piping 530 are connected to the second heat exchanger 519. The second heat exchanger 519 exchanges heat between the refrigerant restricted at the second throttling section 518 and the air surrounding the second heat exchanger 519 to generate second air A2, and sends the heat-exchanged refrigerant to piping 530. The other end of piping 530 is connected to the compressor 511, and the refrigerant sent from the second heat exchanger 519 is returned to the compressor 511.

[0054] In the refrigeration circuit 51 having the above configuration, the first throttling section 516, the first heat exchanger 517, the second throttling section 518, and the second heat exchanger 519 constitute a cooler 56 that generates first air A1 and second air A2 by heat exchange using the refrigerant cooled in the heat dissipation heat exchange section 513. Furthermore, the first heat dissipation heat exchanger 513A and the second heat dissipation heat exchanger 513B are connected in parallel between the compressor 511 and the cooler 56.

[0055] Furthermore, piping 522 and 524 constitute a first refrigerant flow path F1, configured such that the refrigerant compressed by the compressor 511 is used for heat exchange in the first heat exchanger 513A before flowing into the cooler 56. Piping 522, 523, 524, and 525 constitute a second refrigerant flow path F2, configured such that the refrigerant compressed by the compressor 511 is used for heat exchange in the first heat exchanger 513A and the second heat exchanger 513B before flowing into the cooler 56.

[0056] Furthermore, the first three-way valve 512 is positioned between the compressor 511, the first heat exchanger 513A, and the second heat exchanger 513B, and is configured to allow the refrigerant flowing out of the compressor 511 to flow into at least the first heat exchanger 513A. The second three-way valve 515 is positioned between the first heat exchanger 513A, the second heat exchanger 513B, and the cooler 56, and is configured to allow the refrigerant flowing out of at least the first heat exchanger 513A to flow into the cooler 56. The first three-way valve 512 and the second three-way valve 515 constitute a switching section 57.

[0057] The temperature sensor 54 detects the temperature of the ambient temperature storage cabinet 24.

[0058] Based on the temperature detection results from the temperature sensor 54, the control unit 55 controls the various devices that make up the refrigeration circuit 51 to adjust the temperatures of the freezer storage unit 22, the refrigerator storage unit 23, and the ambient temperature storage unit 24 to appropriate temperatures.

[0059] <Operation of the storage device> Next, the temperature control processes of the freezer storage unit 22, the refrigerator storage unit 23, and the ambient temperature storage unit 24 will be described as part of the operation of the storage device 1. Figure 3 is a flowchart of the temperature control process performed by the storage device 1. Figure 4A is an explanatory diagram of normal control. Figure 4B is an explanatory diagram of low-temperature control.

[0060] First, the control unit 55 of the refrigeration system 5 performs normal control as shown in Figure 3 (step S1). Normal control involves controlling the switching unit 57 so that the refrigerant compressed by the compressor 511 flows through the first refrigerant flow path F1, thereby cooling the freezer storage unit 22 and the refrigerator storage unit 23, while preventing the temperature of the ambient temperature storage unit 24 from rising.

[0061] When the control unit 55 performs normal control, it sets the first three-way valve 512 and the second three-way valve 515, which constitute the switching unit 57, to the first state. As shown in Figure 4A, in the first state, the refrigerant flowing into the first three-way valve 512 flows through the solid lines of the pipes 522 and 524 that constitute the first refrigerant flow path F1, while it no longer flows through the dashed lines of the pipes 523 and 525. Therefore, the refrigerant flows in the direction indicated by the arrow Y, and after leaving the compressor 511, it passes through the first heat exchanger 513A, the first throttling section 516, the first heat exchanger 517, the second throttling section 518, and the second heat exchanger 519 in that order, and returns to the compressor 511.

[0062] The control unit 55 then controls the refrigeration circuit 51 to generate first air A1 in the first heat exchanger 517 and second air A2 in the second heat exchanger 519. Specifically, the control unit 55 sets the refrigerant throttling amount (valve opening) in the first throttling section 516 and the second throttling section 518 to a predetermined state and drives the heat exchange fan 514. The control unit 55 then compresses the refrigerant by driving the compressor 511 at a predetermined operating frequency. The refrigerant compressed by the compressor 511 flows through the first refrigerant flow path F1, is cooled by heat exchange in the first heat exchanger 513A, and flows into the first throttling section 516. The first throttling section 516 further lowers the temperature of the refrigerant by throttling the refrigerant cooled in the first heat exchanger 513A. The first heat exchanger 517 generates first air A1 by exchanging heat between the refrigerant, which has been depressurized by the first throttling section 516 and reached a predetermined temperature, and air. The second throttling section 518 further lowers the temperature of the refrigerant by throttling the refrigerant that has undergone heat exchange in the first heat exchanger 517. The second heat exchanger 519 generates second air A2 by exchanging heat between the refrigerant, whose temperature has been lowered by the second throttling section 518, and air. The refrigerant that has undergone heat exchange in the second heat exchanger 519 is returned to the compressor 511.

[0063] Furthermore, the control unit 55 drives the first fan 322 and the second fan 312 of the air curtain generation unit 3 to generate the first air curtain C1 and the second air curtain C2.

[0064] As shown in Figure 1, the second air A2 generated at the bottom of the freezer storage unit 22 is driven to the rear by the second fan 312 and then flows in front of the upper opening 22A via the rear and top of the freezer storage unit 22, thereby generating a second air curtain C2 that covers the entire upper opening 22A. The air of the second air curtain C2 that has passed in front of the freezer storage unit 22 is guided to the rear at the bottom of the freezer storage unit 22 by the intermediate plate-like member 223 and reused for heat exchange in the second heat exchanger 519. This circulation of air from the second air A2 and the second air curtain C2 adjusts the temperature inside the freezer storage unit 22 to the freezing temperature (e.g., -20°C).

[0065] Furthermore, the first air A1 generated above the freezer storage unit 22 is sent forward by the drive of the first fan 322 and then flows in front of the upper opening 22A and the lower opening 23A, thereby generating the first air curtain C1. Preferably, the air velocity of the first air curtain C1 when flowing in front of the upper opening 22A is the same as the air velocity of the second air curtain C2 flowing in front of the upper opening 22A. When the air of the first air curtain C1 passes in front of the freezer storage unit 22, heat exchange takes place between the air of the first air curtain C1 and the air of the second air curtain C2. This heat exchange lowers the temperature of the air in the first air curtain C1 to the refrigeration temperature. A portion of the air that has passed in front of the freezer storage unit 22 is guided to the rear below the freezer storage unit 22 by the intermediate plate-shaped member 223 and reused for heat exchange in the second heat exchanger 519.

[0066] The air from the first air curtain C1, which has undergone heat exchange with the air from the second air curtain C2, covers the entire lower opening 23A. The air from the first air curtain C1, having passed in front of the refrigerated storage unit 23, flows backward and upward in that order due to the lower plate-shaped member 232 and the rear wall 213, and is then guided to the upper duct 321A, where it is reused for heat exchange in the first heat exchanger 517. This circulation of air from the first air A1 and the first air curtain C1 adjusts the temperature inside the refrigerated storage unit 23 to the refrigeration temperature (for example, +3°C).

[0067] As explained above, under normal control, heated air B is not generated, and therefore the temperature inside the ambient temperature storage unit 24 is not adjusted. For this reason, the temperature inside the ambient temperature storage unit 24 under normal control changes according to the outside temperature. In particular, if the storage device 1 is installed outdoors, the temperature inside the ambient temperature storage unit 24 in winter may fall below 0°C.

[0068] As shown in Figure 3, when normal control is performed, the control unit 55 determines at predetermined intervals whether the temperature of the ambient temperature storage unit 24 is below a reference temperature based on the temperature detection result from the temperature sensor 54 (step S2). Here, the reference temperature is the temperature that serves as the basis for switching the control to prevent the items Z in the ambient temperature storage unit 24 from freezing or from deteriorating in quality. For example, to prevent the items Z from freezing, a reference temperature of about +5°C can be used as an example. To prevent the deterioration of the quality of the items Z, the reference temperature can be set according to the items Z being stored.

[0069] If the control unit 55 determines that the temperature of the ambient temperature storage unit 24 is not below the reference temperature (step S2: NO), it determines whether or not to terminate the temperature adjustment process (step S3). If the control unit 55 determines to terminate the temperature adjustment process (step S3: YES), it terminates the temperature adjustment process. Examples of when the control unit 55 determines to terminate the temperature adjustment process include when the switch of the storage device 1 is turned off, or when an operation to terminate the temperature adjustment process is performed. On the other hand, if the control unit 55 determines not to terminate the temperature adjustment process (step S3: NO), it continues normal control (step S1).

[0070] Furthermore, if the control unit 55 determines that the temperature of the ambient temperature storage unit 24 is below the reference temperature (step S2: YES), it performs low-temperature control (step S4). Low-temperature control is a control that controls the switching unit 57 so that the refrigerant compressed by the compressor 511 flows through the second refrigerant flow path F2, thereby cooling the freezer storage unit 22 and the refrigerator storage unit 23, while raising the temperature of the ambient temperature storage unit 24.

[0071] When low-temperature control is performed, the control unit 55 sets the first three-way valve 512 and the second three-way valve 515, which constitute the switching unit 57, to the second state. As shown in Figure 4B, in the second state, the refrigerant flowing into the first three-way valve 512 flows into the pipes 522, 524, 523, and 525, which are indicated by solid lines and constitute the second refrigerant flow path F2. Therefore, the refrigerant flows in the direction indicated by the arrow Y, and after leaving the compressor 511, a portion of it flows into the first heat exchanger 513A, and the remainder flows into the second heat exchanger 513B. After this, the refrigerant that has flowed into the first heat exchanger 513A and the second heat exchanger 513B passes through the first throttling section 516, the first heat exchanger 517, the second throttling section 518, and the second heat exchanger 519 in that order, and returns to the compressor 511.

[0072] In low-temperature control, the control unit 55 drives, for example, the compressor 511, the first fan 322, and the second fan 312 in the same way as in normal control. As described above, some of the refrigerant compressed by the compressor 511 flows into the first heat exchanger 513A, is cooled by heat exchange in the first heat exchanger 513A, and flows into the first throttling section 516.

[0073] Meanwhile, the remaining refrigerant compressed by the compressor 511 flows into the second heat exchanger 513B, as described above. The second heat exchanger 513B exchanges heat between the incoming refrigerant and the air surrounding it. The refrigerant cooled by this heat exchange flows into the first throttling section 516. Also, as shown by the solid line in Figure 1, heated air B is generated by the heat exchange in the second heat exchanger 513B. This heated air B raises the temperature inside the ambient temperature storage unit 24, preventing the temperature inside the ambient temperature storage unit 24 from dropping too low. In particular, the second heat exchanger 513B is located below the ambient temperature storage unit 24. Therefore, due to natural convection, the heated air B rises along the rear of the ambient temperature storage unit 24 and reaches the top of the ambient temperature storage unit 24. Thus, the entire interior of the ambient temperature storage unit 24 can be heated efficiently.

[0074] The refrigerant restricted by the first throttling section 516 passes through the first heat exchanger 517, the second throttling section 518, and the second heat exchanger 519, returning to the compressor 511, just as in normal control. Then, just as in normal control, the first air curtain C1 and the second air curtain C2 are generated, maintaining the temperature inside the freezer storage unit 22 at the freezing temperature and the temperature inside the refrigerator storage unit 23 at the refrigeration temperature.

[0075] As shown in Figure 3, after performing low-temperature control, the control unit 55 determines whether the temperature of the ambient temperature storage unit 24 is below the reference temperature (step S2). If the control unit 55 determines that the temperature of the ambient temperature storage unit 24 is below the reference temperature (step S2: YES), it continues the low-temperature control. On the other hand, if the control unit 55 determines that the temperature of the ambient temperature storage unit 24 is not below the reference temperature (step S2: NO) and also determines that the temperature adjustment process should not be terminated (step S3: NO), it switches from low-temperature control to normal control (step S1).

[0076] As described above, the storage device 1 cools the refrigerant used to generate the first air A1 and second air A2 in the refrigeration device 5 using the second heat exchanger 513B, and the heat obtained from the cooled refrigerant can raise the temperature inside the ambient temperature storage compartment 24. In other words, the storage device 1 can raise the temperature inside the ambient temperature storage compartment 24 without using a heat source such as a heater used solely for heating the ambient temperature storage compartment 24. Furthermore, the storage device 1 can adjust the temperatures inside the freezer storage compartment 22 and the refrigerator storage compartment 23 to the freezing temperature and the refrigerator temperature, respectively, using the first air A1 and the second air A2. Therefore, without complicating the configuration of the storage device 1, it is possible to provide a storage device 1 that can appropriately store items Z that should be stored at low temperatures and items Z that should not be stored at low temperatures.

[0077] Furthermore, the storage device 1 performs normal control when the temperature of the ambient temperature storage cabinet 24 is above the reference temperature, and performs low-temperature control when it is below the reference temperature. In this way, since the control to generate heated air B is not performed when there is no need to raise the temperature of the ambient temperature storage cabinet 24, it is possible to suppress the temperature of the ambient temperature storage cabinet 24 from rising too high.

[0078] [Second Embodiment] Next, a second embodiment of the present disclosure will be described with reference to Figures 5 and 6. Figure 5 is a longitudinal cross-sectional view of the storage device. Figure 6 is a block diagram of the refrigeration device.

[0079] The storage device 1A of the second embodiment shown in Figures 5 and 6 differs from the storage device 1 of the first embodiment in the following two respects. First, a heating air fan 27 is located below the second heat exchanger 513B of the storage device 1A. The heating air fan 27 forcibly sends the heated air B generated during heat exchange in the second heat exchanger 513B to the lower side of the ambient temperature storage unit 24. Second, when the control unit 55 of the refrigeration unit 5 performs the same processing as in the first embodiment shown in Figure 3, the heating air fan 27 is not driven in normal control mode, but is driven in low-temperature control mode.

[0080] By driving the heating air fan 27 in this manner and sending the heated air B downwards, the temperature of the machine room located below the ambient temperature storage unit 24, where machinery (not shown) of the storage device 1A is located, can be raised, thereby suppressing machine failures caused by temperature drops. Furthermore, after the heated air B flows to the bottom of the ambient temperature storage unit 24, it rises along the rear of the ambient temperature storage unit 24 by natural convection and reaches the top of the ambient temperature storage unit 24. Therefore, the entire interior of the ambient temperature storage unit 24 can be heated efficiently. In addition, driving the heating air fan 27 can increase the heat exchange efficiency of the second heat exchanger 513B. For this reason, even if a smaller second heat exchanger 513B is used than the second heat exchanger 513B of the first embodiment, which does not have a heating air fan 27, heat exchange can be performed with the same efficiency as the second heat exchanger 513B of the first embodiment. Therefore, the space required for the second heat exchanger 513B can be reduced, and the cost of the second heat exchanger 513B can be reduced.

[0081] [Third Embodiment] Next, a third embodiment of the present disclosure will be described. Figure 7 is a block diagram of a refrigeration system.

[0082] The refrigeration unit 6 of the storage device 1B shown in Figure 7 differs from the refrigeration units 5 of the storage devices 1 and 1A of the first and second embodiments shown in Figures 2 and 6 in two respects. The first is the configuration of the refrigeration circuit 61. The second is the control content of the control unit 65. Each of these will be explained in detail below. Note that the configuration of the storage device 1B of the third embodiment, other than the refrigeration unit 6, is the same as that of the storage device 1A of the second embodiment shown in Figure 5.

[0083] First, the configuration of the first refrigeration circuit 61 will be explained. Note that components identical to those in the refrigeration device 5 of the first and second embodiments will be given the same names and reference numerals, and their explanations will be omitted or simplified. The refrigeration circuit 61 comprises a compressor 511, a heat dissipation heat exchange unit 513, a fan 514 for the heat dissipation heat exchange unit, a first throttling unit 516, a first heat exchanger 517, a second throttling unit 518, and a second heat exchanger 519.

[0084] The first heat exchanger 513A is connected to the other end of piping 521 and to one end of piping 621. The first heat exchanger 513A exchanges heat between the refrigerant compressed by the compressor 511 and the water flowing through the first heat exchanger 513A, and sends the cooled refrigerant after the heat exchange to piping 621.

[0085] The second heat exchanger 513B is connected to the other end of piping 621 and one end of piping 622. The second heat exchanger 513B exchanges heat between the refrigerant flowing in from the first heat exchanger 513A and the air present below the ambient temperature storage unit 24 (around the second heat exchanger 513B). The second heat exchanger 513B then sends the cooled refrigerant after heat exchange to piping 622 and generates heated air B by warming the air present below the ambient temperature storage unit 24.

[0086] The other end of pipe 622 and one end of pipe 527 are connected to the first throttling section 516. The first throttling section 516 restricts the flow of refrigerant cooled in the heat exchange section 513 and sends it to pipe 527.

[0087] In the refrigeration circuit 61 having the above configuration, the first heat exchanger 513A and the second heat exchanger 513B are connected in series between the compressor 511 and the cooler 56. Furthermore, the piping 521, 621, and 622 constitute a refrigerant flow path F configured so that the refrigerant compressed by the compressor 511 flows in the order of the first heat exchanger 513A, the second heat exchanger 513B, and the cooler 56.

[0088] Next, I will explain the control contents of the second control unit 65. The overall control is the same as in the first and second embodiments shown in Figure 3, but the contents of the normal control and low-temperature control differ from those of the first and second embodiments.

[0089] First, let's explain the normal control. In normal control, the control unit 65 cools the inside of the freezer storage unit 22 and the refrigerated storage unit 23 if the temperature inside the ambient temperature storage unit 24 is above the reference temperature. On the other hand, the control unit 65 adjusts the amount of heat dissipated during heat exchange in the first heat exchanger 513A and the second heat exchanger 513B so as not to raise the temperature inside the ambient temperature storage unit 24. In addition, the control unit 65 does not drive the heating air fan 27.

[0090] Specifically, the control unit 65 cools the refrigerant compressed by the compressor 511 through heat exchange in the first heat exchanger 513A and flows it to the second heat exchanger 513B. At this time, the control unit 65 adjusts the amount of heat dissipated in the first heat exchanger 513A, that is, the temperature of the refrigerant flowing into the second heat exchanger 513B, so that heat exchange does not occur in the second heat exchanger 513B, or so that even if heat exchange occurs in the second heat exchanger 513B, the temperature of the ambient temperature storage unit 24 does not rise. The refrigerant that flows out of the second heat exchanger 513B passes through the first throttling section 516, the first heat exchanger 517, the second throttling section 518, and the second heat exchanger 519, and returns to the compressor 511, similar to the first and second embodiments. Furthermore, similar to the first and second embodiments, the temperature inside the freezer storage unit 22 is adjusted to the freezing temperature, and the temperature inside the refrigerator storage unit 23 is adjusted to the refrigeration temperature, while the temperature inside the ambient temperature storage unit 24 is not adjusted.

[0091] Next, low-temperature control will be explained. In low-temperature control, if the temperature inside the ambient temperature storage unit 24 is below the reference temperature, the control unit 65 cools the inside of the freezer storage unit 22 and the refrigerator storage unit 23, and raises the temperature inside the ambient temperature storage unit 24 by reducing the amount of heat dissipated during heat exchange in the first heat exchanger 513A compared to normal control. On the other hand, the control unit 65 increases the amount of heat dissipated during heat exchange in the second heat exchanger 513B compared to normal control, and drives the heating air fan 27.

[0092] Specifically, when low-temperature control is performed, the control unit 65 directs the refrigerant compressed by the compressor 511 to the second heat exchanger 513B without cooling it in the first heat exchanger 513A. One example of a method to prevent the refrigerant from being cooled in the first heat exchanger 513A is to stop the heat exchanger fan 514. If the first heat exchanger 513A is a water-cooled heat exchanger, one example of a method to prevent the refrigerant from being cooled in the first heat exchanger 513A is to reduce the amount of water flowing through the first heat exchanger 513A compared to normal control. Refrigerant at a higher temperature than during normal control flows into the second heat exchanger 513B. The second heat exchanger 513B exchanges heat between the incoming refrigerant and the surrounding air, thereby flowing the cooled refrigerant to the first throttling section 516 and generating heated air B, as shown by the solid line in Figure 7. Similar to the second embodiment, the heated air B is sent downward by the drive of the heated air fan 27, causing the temperature in the machine room to rise. Then, due to natural convection, the heated air B rises along the rear of the ambient temperature storage unit 24 and reaches the top of the ambient temperature storage unit 24, warming the inside of the ambient temperature storage unit 24 and preventing the temperature of the ambient temperature storage unit 24 from dropping too low. In addition, the refrigerant flowing out of the second heat exchanger 513B flows through the same path as during normal control, so the temperatures inside the freezer storage unit 22 and the refrigerator storage unit 23 are adjusted in the same way as during normal control.

[0093] In the storage device 1B of the third embodiment, the temperature inside the ambient temperature storage chamber 24 can be raised by using a refrigerant used to generate the first air A1 and second air A2 in the refrigeration device 6, without using a heat source such as a heater used solely for heating inside the ambient temperature storage chamber 24. Furthermore, in the refrigeration device 6 of the storage device 1B, the first heat exchanger 513A and the second heat exchanger 513B are connected in series, eliminating the need for the first three-way valve 512 and the second three-way valve 515, which are used to connect the first heat exchanger 513A and the second heat exchanger 513B in parallel, as in the refrigeration device 5 of the first and second embodiments. Therefore, the configuration of the refrigeration device 6 can be simplified compared to the refrigeration device 5 of the first and second embodiments.

[0094] It is not necessary to place the heating air fan 27 in the storage device 1B. In this case, the heated air B generated by the heat exchange in the second heat exchanger 513B rises up the rear side of the ambient temperature storage cabinet 24 by natural convection, as in the first embodiment, and reaches the top side of the ambient temperature storage cabinet 24, thereby warming the inside of the ambient temperature storage cabinet 24.

[0095] [Modified examples of embodiments] This disclosure is not limited to the embodiments described herein, and various modifications can be made without departing from its spirit. Furthermore, the embodiments described above and the modifications shown below may be combined in any way, as long as they function properly.

[0096] For example, in storage devices 1, 1A, and 1B, the control units 55 and 65 switch between normal control and low-temperature control based on the temperature inside the ambient temperature storage cabinet 24. However, the switching between normal control and low-temperature control may also be done based on the judgment of the manager of storage devices 1, 1A, and 1B. For example, if storage devices 1, 1A, and 1B are installed outdoors, the manager may switch from normal control to low-temperature control on days or during seasons when the maximum temperature falls below 0°C. Examples of methods by which the manager can switch between normal control and low-temperature control include the manager operating a switching control unit installed in storage devices 1, 1A, and 1B, or the manager remotely operating the system using a terminal device or the like.

[0097] The storage devices 1, 1A, and 1B may be configured to perform low-temperature control only. In this case, the control units 55 and 65 should perform control to maintain the temperature inside the ambient temperature storage unit 24 at a temperature that does not affect the quality of the goods Z, regardless of the temperature of the installation location of the storage devices 1, 1A, and 1B. Furthermore, in the first to third embodiments, the control units 55 and 65 may also perform control to prevent the temperature inside the ambient temperature storage unit 24 from rising too high, based on the temperature inside the ambient temperature storage unit 24, even while low-temperature control is being performed. Examples of such control include adjusting the temperature of the refrigerant flowing out of the compressor 511 and adjusting the rotation speed of the heating air fan 27.

[0098] In storage devices 1, 1A, and 1B, the second heat exchanger 513B may be positioned around the ambient temperature storage unit 24, such as on the front, rear, top, right, and left sides. In this case, it is preferable to provide through-holes 241A and 262A, shown by the dashed lines in Figure 1, to send the heated air B generated by the second heat exchanger 513B to the lower part of the ambient temperature storage unit 24 and the machine room. The through-hole 241A is formed to penetrate vertically at the front end of each shelf 241. The through-hole 262A is formed to penetrate vertically at the front end of the mounting section 262. With this configuration, for example, the heated air B that reaches the top of the ambient temperature storage unit 24 will flow downwards along the front of the ambient temperature storage unit 24 through the through-holes 241A and 262A, as shown by the dashed lines in Figure 1, due to natural convection. Therefore, the temperature of the lower part of the ambient temperature storage unit 24 and the machine room can be raised. In particular, by further installing a heating air fan 27 to send heated air B to the lower part of the ambient temperature storage unit 24, the temperature of the lower part of the ambient temperature storage unit 24 and the machine room located below the ambient temperature storage unit 24 can be efficiently raised. Also, by positioning the heating air fan 27 to send heated air B into the ambient temperature storage unit 24 (for example, the upper part of the ambient temperature storage unit 24), the temperature inside the ambient temperature storage unit 24 can be raised more quickly. Through holes 241A may also be formed on both the left and right ends of each shelf 241. Alternatively, each shelf 241 may be fixed to the left and right side walls 214 such that a gap is formed between it and the front wall 212, allowing heated air B to pass through the gap. Through holes 262A may also be formed on both the left and right ends of the mounting section 262. Alternatively, the mounting section 262 may be fixed to the left and right side walls 214 such that a gap is formed between it and the front wall 212, allowing the heated air B to pass through the gap.

[0099] As the second heat exchanger 513B of the storage devices 1,1A,1B, a tubular heat exchanger or a water-cooled heat exchanger may be used. When a water-cooled heat exchanger is used, heated air B should be generated by performing heat exchange between heated water and air in the heat exchanger.

[0100] Although two types of cooling storage units, a freezer storage unit 22 and a refrigerator storage unit 23, have been given as examples for the storage devices 1, 1A, and 1B, only the freezer storage unit 22 or only the refrigerator storage unit 23 may be provided in the storage devices 1, 1A, and 1B, or additional cooling storage units for storing items Z at other freezing or refrigeration temperature ranges may be provided in the storage devices 1, 1A, and 1B.

[0101] Alternatively, a branch pipe may be placed in place of the first three-way valve 512 of the storage device 1,1A, and valves may be placed in the piping 522 and 523 respectively, and the open / closed state of each valve may be controlled so that the refrigerant flowing out from the compressor 511 flows into at least the first heat exchanger 513A of the first heat exchanger 513A and the second heat exchanger 513B. Alternatively, the above configuration of placing the branch pipe and valve in place of the second three-way valve 515 may be applied so that the refrigerant flowing in from at least the first heat exchanger 513A of the first heat exchanger 513A and the second heat exchanger 513B flows into the cooler 56.

[0102] In the storage devices 1, 1A, and 1B, the air from the first air curtain C1 is configured to be returned to the area around the first heat exchanger 517, but it may be configured not to be returned. Similarly, the air from the second air curtain C2 is configured to be returned to the area around the second heat exchanger 519, but it may be configured not to be returned.

[0103] In the storage devices 1, 1A, and 1B, the example shows a configuration in which a storage box 20 containing the item Z is placed in the freezer storage 22, the refrigerator storage 23, and the ambient temperature storage 24. However, it is also possible to place the item Z directly into the freezer storage 22, the refrigerator storage 23, and the ambient temperature storage 24 without using the storage box 20. [Industrial applicability]

[0104] This disclosure is applicable to storage devices. [Explanation of Symbols]

[0105] 1,1A,1B Storage device 2 Main body 3. Air curtain generation unit 4. Conveying device 5,6 Refrigeration equipment 20 Storage box 21 cabinets 22 Freezer storage 22A Upper opening 23 Refrigerated storage 23A Lower opening 24 Room temperature storage 24A aperture 25 Control Panel 26. Inbound / Outbound Section 27. Fan for heating air 31 Second air curtain generation unit 32 First air curtain generation unit 41 Article holding part 42 Moving mechanism 51,61 Refrigeration Circuit 54 Temperature Sensor 55,65 Control Unit 56 Cooler 57 Switching section 211 Upper wall 212 Front wall 213 Back wall 212A Front opening 214 Side wall 221,231,241 shelves 222 Upper back plate 222A Upper through hole 223 Intermediate plate-like member 223A Extension 224 Rear plate-shaped member 232 Lower plate-shaped member 241A,262A through hole 261 Opening and closing doors 262 Mounting section 311 Second channel 312 Second Fan 321 First channel 321A Upper duct 321B Duct protrusion 322 First Fan 511 Compressor 512 First three-way valve 513 Heat radiation heat exchange section 513A 1st radiation heat exchanger 513B 2nd radiation heat exchanger 514 Fan for heat dissipation and heat exchange section 515 Second three-way valve 516 First aperture section 517 1st heat exchanger 518 Second aperture section 519 Second heat exchanger 521, 522, 523, 524, 525, 526, 527, 528, 529, 530, 621, 622 Piping A1 First Air A2 Second Air B. Heated air C1 First Air Curtain C2 Second Air Curtain F Refrigerant flow path F1 First Refrigerant Flow Path F2 Second Refrigerant Flow Channel R1 1st article storage space R2 2nd article storage space R3 transport space Z Goods

Claims

1. a refrigerated storage facility for storing items in a cooled state; A room temperature storage cabinet that stores items without refrigeration, a refrigeration device that cools the inside of the cooling storage cabinet, The refrigeration device includes a compressor that compresses an introduced refrigerant, a heat radiation heat exchanger that cools the refrigerant compressed by the compressor, and a cooler that generates cooled air that cools the inside of the refrigeration storage cabinet by heat exchange using the refrigerant cooled by the heat radiation heat exchanger, and is configured so that the refrigerant that has undergone heat exchange in the cooler is introduced into the compressor, The heat radiation heat exchange unit is a first heat radiation heat exchanger that cools the refrigerant by heat exchange; A second heat dissipation heat exchanger that cools the refrigerant by heat exchange and raises the temperature inside the room temperature storage cabinet using heat obtained from the refrigerant. Storage device.

2. The second heat dissipation heat exchanger is arranged below the room temperature storage cabinet. The storage device according to claim 1 .

3. Further provided is a heated air fan that sends air heated by heat obtained from the refrigerant into the room temperature storage cabinet or to the lower side of the room temperature storage cabinet.

3. The storage device according to claim 1 or 2.

4. The refrigeration device is a first refrigerant flow path configured so that the refrigerant compressed by the compressor is used for heat exchange only in the first heat radiation heat exchanger and then flows into the cooler; a second refrigerant flow path configured such that a portion of the refrigerant compressed by the compressor is used for heat exchange in the first heat radiation heat exchanger and then flows into the cooler, while the remaining refrigerant compressed by the compressor is used for heat exchange in the second heat radiation heat exchanger and then flows into the cooler; a switching unit that switches between a state in which the refrigerant flows through the first refrigerant flow path and a state in which the refrigerant flows through the second refrigerant flow path, The storage device according to any one of claims 1 to 3.

5. The refrigeration device is When the temperature inside the room temperature storage cabinet is equal to or higher than a reference temperature, the switching unit is controlled so that the refrigerant compressed by the compressor flows through the first refrigerant flow path, thereby cooling the inside of the cooling storage cabinet while not increasing the temperature inside the room temperature storage cabinet; and When the temperature inside the room temperature storage cabinet is lower than the reference temperature, the control unit controls the switching unit so that the refrigerant compressed by the compressor flows through the second refrigerant flow path, thereby cooling the inside of the cooling storage cabinet and raising the temperature inside the room temperature storage cabinet. The storage device according to claim 4.

6. The refrigeration device is a refrigerant flow path configured so that the refrigerant compressed by the compressor flows through the first heat radiation heat exchanger, the second heat radiation heat exchanger, and the cooler in this order; a control unit that adjusts the amount of heat radiation during the heat exchange in the heat radiation heat exchange unit, The control unit When the temperature inside the room-temperature storage cabinet is equal to or higher than a reference temperature, normal control is performed to cool the inside of the cooling storage cabinet while adjusting the heat radiation amounts in the first heat radiation heat exchanger and the second heat radiation heat exchanger so as not to raise the temperature inside the room-temperature storage cabinet. When the temperature inside the room-temperature storage cabinet is lower than the reference temperature, the inside of the cooling storage cabinet is cooled, and low-temperature control is performed to reduce the amount of heat radiation in the first heat radiation heat exchanger compared to that during the normal control, while increasing the amount of heat radiation in the second heat radiation heat exchanger compared to that during the normal control, so as to raise the temperature inside the room-temperature storage cabinet. The storage device according to any one of claims 1 to 3.

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