Cooling system, vehicle equipped with cooling system and cool storage unit

Abstract

To realize an efficient cooling system capable of rapidly cooling stored items. The cooling system (100) includes a cooling chamber (70) for cooling contents, and a regenerator (1) for storing cold energy from a cryogenic cooling medium supplied from a supply source. The regenerator (1) is provided within the cooling chamber (70), or the cooling chamber (70) includes an inlet for receiving gas cooled by the regenerator (1).

Description

[Technical Field]

[0001] The present invention relates to a cooling system for cooling a contained object, a vehicle equipped with the cooling system, and a regenerator. [Background technology]

[0002] Patent Document 1 discloses a refrigeration system including a container for accommodating an item to be maintained at a controlled temperature, and a temperature control means for generating the controlled temperature in the container and controlling the controlled temperature in the container. The temperature control means includes a combination of a mechanical refrigeration device and a cryogenic cooling medium refrigeration device.

[0003] Mechanical refrigeration devices have a relatively low capacity to cool the interior of a container, whereas cryogenic cooling media refrigeration devices can rapidly reduce said temperature. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-190587 Summary of the Invention [Problem to be solved by the invention]

[0005] In the invention described in Patent Document 1, a cryogenic cooling medium such as liquid nitrogen is sprayed directly into the container. In this case, the cryogenic cooling medium vaporizes (expands) inside the container and leaks out. This makes it difficult to efficiently utilize the cold heat (cold energy) of the cryogenic cooling medium. Furthermore, if ventilation is required to allow people to enter the container, the cold air inside the container is expelled to the outside, reducing the cooling efficiency.

[0006] An object of one aspect of the present invention is to provide an efficient cooling system that can rapidly cool stored items. [Means for solving the problem]

[0007] In order to solve the above problems, a cooling system in one aspect of the present invention comprises a cooling chamber for cooling stored contents and a cold storage device for storing cold energy from a cryogenic cooling medium supplied from a supply source, wherein the cold storage device is provided within the cooling chamber, or the cooling chamber comprises an inlet portion for receiving gas cooled by the cold storage device.

[0008] The regenerator according to one aspect of the present invention includes aluminum balls or ceramic balls and a liquid as a refrigerant for storing the cold energy of the cryogenic cooling medium supplied from the supply source. [Effects of the Invention]

[0009] According to one aspect of the present invention, the contents can be cooled quickly and efficiently. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram illustrating a cooling system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view illustrating an example of a pre-cooling device provided in the cooling system. [Figure 3] FIG. 2 is a perspective view schematically illustrating the internal configuration of a pre-cooling device. [Figure 4] FIG. 2 is a diagram illustrating an example of the configuration of a regenerator. [Figure 5] 1 is a diagram showing an example of a configuration of a piping structure of a cooling system according to a first embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram illustrating a cooling system according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a schematic diagram illustrating a vehicle equipped with a cooling system according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Embodiment 1] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the following description is intended to provide a better understanding of the gist of the invention, and does not limit the present disclosure unless otherwise specified.

[0012] Fig. 1 is a schematic diagram illustrating a cooling system according to a first embodiment of the present invention. In Fig. 1, the flow of gas is indicated by hollow arrows. In the example shown in Fig. 1, the up-down direction of the letters of each reference symbol in the drawing corresponds to the vertical direction in the cooling system according to the first embodiment.

[0013] As shown in Fig. 1, the cooling system 100 in this embodiment includes a cooling chamber 70 that cools contents, and a regenerator 1 that stores cold energy from a cryogenic cooling medium supplied from a supply source (not shown). In this embodiment, the regenerator 1 is provided inside the cooling chamber 70, but is not limited to the example shown in Fig. 1, and in another embodiment of the present invention, the regenerator 1 may be provided outside the cooling chamber 70. The cooling chamber 70 may include an introduction part that receives gas cooled by the regenerator 1 provided outside the cooling chamber 70 (see embodiment 2 and Fig. 6 described below).

[0014] Typically, liquid nitrogen can be used as the cryogenic cooling medium. However, the cryogenic cooling medium used in the cooling system 100 is not limited thereto, and may be, for example, liquid oxygen, liquid carbon dioxide, or the like. The cryogenic cooling medium may be configured by combining a plurality of types of medium. In the cooling system 100, by charging a prepared cryogenic cooling medium into a supply source, the cryogenic cooling medium can be supplied from the supply source to the regenerator 1. The supply source may be, for example, a cylinder or tank truck that stores the cryogenic cooling medium.

[0015] 1, the cryogenic cooling medium is supplied from a supply source to the regenerator 1 through a supply pipe 21 and flows through a regenerator flow path 2 provided in the regenerator 1. This causes cold energy to be stored in the refrigerant 3 of the regenerator 1 from the cryogenic cooling medium. Thereafter, the cryogenic cooling medium is discharged from the regenerator 1 to the outside of the cooling chamber 70 through a discharge pipe 22. The specific structure of the regenerator 1 will be described later.

[0016] Unlike cooling methods in which a vaporized cryogenic cooling medium is contained in the gas in the cooling chamber 70, the cooling system 100 uses a regenerator 1 to cool the gas in the cooling chamber 70. In the cooling system 100, the cryogenic cooling medium is used to store cold energy in the regenerator 1 and does not come into direct contact with the gas (air, carbon dioxide, etc.) in the cooling chamber 70.

[0017] In the cooling system 100 of this embodiment, the gas in the cooling chamber 70 is cooled using the cool storage device 1 that stores the cold energy of the cryogenic cooling medium, thereby enabling the contents in the cooling chamber 70 to be cooled rapidly and efficiently. The contents may be any object that needs to be cooled, and may typically be fresh produce (vegetables or fruit). The cooling system 100 can be used to pre-cool the fresh produce.

[0018] Generally, freshness of fruits and vegetables must be maintained after harvest, and pre-cooling them as soon as possible after harvest is effective in maintaining freshness. This is because pre-cooling suppresses the respiration of fruits and vegetables, reducing their energy consumption and making it easier to maintain freshness.

[0019] Here, pre-cooling equipment is not always conveniently located near the harvest site of fruits and vegetables, and the pre-cooling equipment is only used during the harvest season appropriate for the type of fruit and vegetables. In the cooling system 100 of this embodiment, for example, a truck compartment, a container that can be loaded onto a truck, a small warehouse, or a private room in a building can be used as the cooling chamber 70. In one embodiment of the present invention, by arranging a cryogenic cooling medium supply source, a regenerator 1, piping, etc. in the space that will become the cooling chamber 70, the cooling system 100 can be relatively easily constructed as a pre-cooling equipment that can rapidly and efficiently cool and pre-cool fruits and vegetables.

[0020] The cooling system 100 in this embodiment may further include a duct cover 15 that surrounds a portion of the periphery of the regenerator 1. The duct cover 15 includes an intake section 15B that takes in gas from the cooling chamber 70, and an exhaust section 15C that exhausts gas cooled by the regenerator 1. The cooling system 100 includes a first fan 12 that generates a gas flow from the intake section 15B to the exhaust section 15C.

[0021] The cooling system 100 can cool the gas more efficiently by bringing the gas taken in from the intake section 15B into contact with the regenerator 1 inside the duct cover 15, and can discharge the cooled gas from the exhaust section 15C into the cooling chamber 70. This makes it easier to cool the contents more rapidly and efficiently.

[0022] The duct cover 15 may be provided with a cylindrical portion 15A located between the intake portion 15B and the exhaust portion 15C and having a cylindrical shape. The intake portion 15B may be one open end of the cylindrical portion 15A. The cylindrical portion 15A may be provided from the intake portion 15B to the exhaust portion 15C, and the end opposite to the intake portion 15B may be connected to the exhaust portion 15C. The regenerator 1 may be located in the space inside the cylindrical portion 15A.

[0023] Hereinafter, the flow of gas taken in from intake section 15B will be referred to as first intake airflow 81, and the flow of gas cooled by regenerator 1 and discharged from discharge section 15C will be referred to as first discharge airflow 82. First fan 12 generates a flow of gas from intake section 15B to discharge section 15C, thereby generating first intake airflow 81 and first discharge airflow 82.

[0024] 1, first fan 12 is located at the end of discharge section 15C opposite the end connected to cylindrical section 15A. First fan 12 is only required to generate a gas flow from suction section 15B to discharge section 15C, and the installation position and number of first fans 12 are not particularly limited. For example, first fan 12 may be located in suction section 15B or in cylindrical section 15A.

[0025] Fig. 2 is a perspective view showing an example of a pre-cooling device 10 provided in a cooling system. Fig. 2 shows a transparent view of a housing 11 of the pre-cooling device 10. In the example shown in Fig. 2, five duct covers 15 are provided, and a regenerator 1 is located inside each of them.

[0026] As shown in Figures 1 and 2, the cooling system 100 in this embodiment may include a housing 11 that houses a regenerator 1 surrounded by a duct cover 15 and has an opening 13 for taking in gas from the cooling chamber 70, and a guide member 14 that guides the gas from the cooling chamber 70 taken in through the opening 13 to the vicinity of the suction section 15B.

[0027] Hereinafter, the device configured by accommodating the regenerator 1, the duct cover 15, etc. in the housing 11 will be referred to as the pre-cooling device 10. The pre-cooling device 10 can also be referred to as a cooling device. As described above, the cooling system 100 may be used to pre-cool the contents, and the pre-cooling device 10 is a device that can cool the cooling chamber 70 to a temperature range for pre-cooling the contents.

[0028] In the cooling system 100, the space inside the pre-cooling device 10 is defined by the housing 11 in the cooling chamber 70, and a first intake airflow 81 flows into the space inside the pre-cooling device 10 through an opening 13 in the housing 11. The opening 13 may be, for example, a slit formed in the housing 11. Then, in the space inside the pre-cooling device 10, the first intake airflow 81 is cooled by the regenerator 1, and a first exhaust airflow 82 is discharged to the outside of the pre-cooling device 10.

[0029] Guide member 14 is a member that defines a flow path that guides gas sucked in from opening 13 that opens on the side of housing 11 in a vertically downward direction. Regenerator 1 stands upright in the vertical direction, and intake section 15B of duct cover 15 that surrounds regenerator 1 opens in the vertically downward direction. Guide member 14 directs the flow of gas sucked in from opening 13 of housing 11 in the vertically downward direction and guides it to the vicinity of intake section 15B. This configuration allows first intake airflow 81 to be efficiently taken in by intake section 15B.

[0030] Exhaust section 15C may be in communication with a circular opening provided in housing 11 at a position higher than opening 13, for example. First fan 12 may be installed in the opening of housing 11. An opening in housing 11 may be provided that communicates with exhaust section 15C so that first exhaust airflow 82 is exhausted obliquely upward. In cooling system 100, first intake airflow 81 is taken in through opening 13 that is located relatively higher than the floor of cooling chamber 70, and first exhaust airflow 82 is exhausted into cooling chamber 70 from the open end of exhaust section 15C that is located higher than opening 13. This makes it easier to efficiently lower the temperature in cooling chamber 70 while reducing unevenness in the temperature distribution in cooling chamber 70.

[0031] Fig. 3 is a perspective view showing a schematic internal configuration of the pre-cooling device. In Fig. 3, the housing 11 is omitted and shown by a broken line, and the duct cover 15 is removed. Fig. 4 is a diagram showing one configuration example of the regenerator. The diagram indicated by reference numeral 401 in Fig. 4 is a plan view of the regenerator 1 seen from above, and the diagram indicated by reference numeral 402 in Fig. 4 is a cross-sectional view of the regenerator 1 cut in the longitudinal direction.

[0032] 3, the cooling system 100 of this embodiment includes five regenerators 1A to 1E in a housing 11. Hereinafter, the regenerators 1A to 1E will be collectively referred to as regenerator 1 when no distinction is made between them.

[0033] 3 and 4, the regenerator 1 includes a main body 5 and a regenerator flow path 2 located inside the main body 5. In Fig. 3, the regenerator 1B shows the main body 5, while the regenerators 1A and 1E show the regenerator flow path 2 inside the main body 5 with a portion of the main body 5 omitted. The regenerator flow path 2 is a pipe through which a cryogenic cooling medium flows.

[0034] The main body 5 may be, for example, a cylindrical container with a bottom. The inlet and outlet of the cold storage flow path 2 in the main body 5 are connected to piping outside the main body 5 through holes provided in the top plate of the main body 5. The cold storage flow path 2 is connected to the above-mentioned supply piping 21 and discharge piping 22 (see FIG. 1).

[0035] The specific shape and material of the main body 5 are not particularly limited. Examples of the material of the main body 5 include aluminum and stainless steel. In the example shown in Fig. 3 and Fig. 4, the cold storage flow path 2 is provided in a spiral shape, and in this case, the surface area of ​​the cold storage flow path 2 in the main body 5 can be increased. The specific shape of the cold storage flow path 2 and the material of the piping that constitutes the cold storage flow path 2 are not particularly limited.

[0036] The regenerator 1 may contain a refrigerant 3 inside the main body 5. By including the refrigerant 3, it is possible to effectively store cold energy from the cryogenic cooling medium flowing through the cold storage flow path 2. The regenerator 1 may include aluminum balls or ceramic balls and a liquid as the refrigerant 3 that stores cold energy from the cryogenic cooling medium supplied from a supply source. For example, alumina balls can be used as the ceramic balls. For example, the liquid can be water, ethylene glycol water, or the like.

[0037] In the example shown in FIGS. 3 and 4, the regenerator 1 includes fins 4 that protrude radially from the outer wall of the main body 5. The fins 4 may have a flat plate shape. The fins 4 may have a shape and be made of a material that facilitates heat exchange with the gas flowing through the duct cover 15. The specific shape and material of the fins 4 are not particularly limited, but the material of the fins 4 may be stainless steel or aluminum, for example. By including the fins 4, the surface area of ​​the regenerator 1 can be effectively increased. Therefore, the gas passing through the duct cover 15 can be cooled more efficiently. As a result, the contents contained in the cooling chamber 70 can be cooled more rapidly and efficiently.

[0038] Fig. 5 is a diagram showing one example of the piping structure of the cooling system in embodiment 1 of the present invention. As shown in Fig. 5, a cryogenic cooling medium is supplied to the regenerators 1A to 1E through a supply pipe 21 that branches so as to connect to each of the regenerators 1A to 1E. Then, the cryogenic cooling medium flowing out of each of the regenerators 1A to 1E joins together and is discharged to the outside of the cooling chamber 70 through a discharge pipe 22. This allows the piping structure of the cryogenic cooling medium to be relatively simple. Note that the specific piping structure of the cooling system 100 is not particularly limited.

[0039] Other configurations of the cooling system 100 in this embodiment will be described below with reference to FIG. 1 again.

[0040] The cooling system 100 in this embodiment may include a second fan 30 that circulates the gas within the cooling chamber 70. The second fan 30 may be provided, for example, on the ceiling of the cooling chamber 70 or on the inner wall surface of the cooling chamber 70. The number and location of the second fans 30 are not particularly limited. By forcing the gas within the cooling chamber 70 to convect using the second fan 30, it is possible to more easily equalize the temperature distribution within the cooling chamber 70 and to more easily lower the temperature within the cooling chamber 70. This makes it easier to effectively lower the temperature of the contents.

[0041] The cooling system 100 in this embodiment includes a control device 40. In the example shown in Fig. 1, a supply adjustment valve 23 is provided in the supply pipe 21, and a discharge valve 25 is provided in the discharge pipe 22. The supply adjustment valve 23 may be a solenoid valve, and the control device 40 may adjust the opening of the supply adjustment valve 23 to control the flow rate of the cryogenic cooling medium supplied to the regenerator 1. The opening of the discharge valve 25 may be controlled by the control device 40, or the opening may be adjusted manually by a person.

[0042] The cooling system 100 may also include a pipe that bypasses the regenerator 1 and connects the supply pipe 21 and the discharge pipe 22, and an automatic atmospheric release valve 24, so that the cryogenic cooling medium can be sent to the discharge pipe 22 via the automatic atmospheric release valve 24 before the pressure in the supply pipe 21 exceeds a predetermined range.

[0043] The control device 40 receives data regarding temperature information from a temperature measuring device installed in the cooling chamber 70, and can use a known control method to control the flow rate of the cryogenic cooling medium and the operation of the first fan 12 based on conditions such as the temperature set (input) to pre-cool the contents of the cooling chamber 70.

[0044] When the cooling system 100 pre-cools the contents in the cooling chamber 70, the appropriate pre-cooling temperature varies depending on the type of contents. Generally, temperatures below 0°C are undesirable for fruits and vegetables. Therefore, the pre-cooling temperature may be set to, for example, about 0°C to 5°C. In contrast, the cryogenic cooling medium provides sub-zero cold to the cool storage unit 1. Therefore, if the first fan 12 in the pre-cooling device 10 continues to blow the first exhaust airflow 82, the temperature inside the cooling chamber 70 may fall below the set pre-cooling temperature (particularly, below 0°C). In this case, the control device 40 temporarily stops driving the first fan 12.

[0045] The control device 40 may further control the operation of the second fan 30. For example, the control device 40 may perform control to drive the second fan 30 while the first fan 12 is not driven. Driving the second fan 30 can generate convection within the cooling chamber 70. As a result, it is possible to reduce unevenness in the temperature distribution within the cooling chamber 70 and more effectively lower the temperature of the contents.

[0046] Furthermore, the cooling system 100 in this embodiment may include a mechanical cooling device 60 that cools the gas in the cooling chamber 70. Hereinafter, the flow of gas taken into the mechanical cooling device 60 from inside the cooling chamber 70 will be referred to as a second intake airflow 83, and the flow of gas cooled by the mechanical cooling device 60 that is discharged from the mechanical cooling device 60 into the cooling chamber 70 will be referred to as a second discharge airflow 84. The control device 40 may control the operation of the pre-cooling device 10 and the mechanical cooling device 60.

[0047] A known device can be used as the mechanical cooling device 60. Generally, the amount of heat that the mechanical cooling device 60 can pump out to the outside is determined by the size (output) of the device. When cooling the cooling chamber 70 using only the mechanical cooling device 60, it is necessary to use a relatively large mechanical cooling device 60 corresponding to the size of the cooling chamber 70 and the amount of contents stored therein.

[0048] In contrast, in the cooling system 100 of this embodiment, for example, after items at ambient temperature are carried into the cooling chamber 70, control may be performed to first operate the pre-cooling device 10 while not operating the mechanical cooling device 60. This facilitates a relatively rapid reduction in the temperature of the items, such as fruits and vegetables. Next, after the temperature of the items has dropped to a relatively low level, control may be performed to stop operating the pre-cooling device 10 while operating the mechanical cooling device 60. After the cooling chamber 70 and the items have cooled, cooling may be performed to offset the heat entering from the outside, and the mechanical cooling device 60 can be suitably used for such cooling. Because the output required for the mechanical cooling device 60 can be reduced, the cooling system 100 allows the mechanical cooling device 60 to be relatively small in size.

[0049] [Embodiment 2] Another embodiment of the present invention will be described below with reference to the drawings. Note that the configuration other than that described in this embodiment is the same as that of the first embodiment.

[0050] Fig. 6 is a schematic diagram illustrating a cooling system according to a second embodiment of the present invention. As shown in Fig. 6, in a cooling system 100 according to the second embodiment, a pre-cooling device 10 is installed in a pre-cooling device installation chamber 80 adjacent to a cooling chamber 70. The cooling chamber 70 includes an introduction section 71 that receives gas cooled by the regenerator 1. Between the cooling chamber 70 and the pre-cooling device installation chamber 80, the introduction section 71 and an opening 13 may be provided, for example, so as to penetrate the wall of the cooling chamber 70.

[0051] According to the above configuration, the space (volume) of the cooling chamber 70 can be made relatively large.

[0052] Not limited to the example shown in FIG. 6, in the cooling system 100, the cooling chamber 70 and the pre-cooling device installation chamber 80 may be separated from each other, in which case the cooling chamber 70 and the pre-cooling device installation chamber 80 may be connected by a ventilation path (e.g., a duct).

[0053] [Embodiment 3] Fig. 7 is a schematic diagram illustrating a vehicle equipped with a cooling system according to the third embodiment of the present invention. As shown in Fig. 7, a refrigerated vehicle 200 according to the third embodiment of the present invention is equipped with a cooling system 100. The vehicle may be any vehicle capable of mounting the cooling system 100, and may be, for example, a small truck, a medium truck, a large truck, a trailer, or the like.

[0054] The refrigerated vehicle 200 can be used as a mobile pre-cooling facility. The refrigerated vehicle 200 makes it easy to pre-cool fruits and vegetables at a desired time and place, for example. As described above, by combining the pre-cooling device 10 with the relatively small mechanical cooling device 60, it is easy to transport the contents after pre-cooling while keeping them cool in the mechanical cooling device 60.

[0055] [Contribution to SDGs] According to one aspect of the present invention, contents stored in a cooling chamber can be cooled rapidly and efficiently. For example, by providing a cooling system at a desired location and time, it is possible to easily pre-cool fruits and vegetables, thereby making it easier to maintain the freshness of the fruits and vegetables. According to one aspect of the present invention, maintaining the freshness of fruits and vegetables increases the likelihood that the fruits and vegetables will be consumed by consumers, thereby effectively reducing the amount of fruits and vegetables that are discarded (i.e., food waste). Such effects also contribute to the achievement of, for example, Goal 12 "Ensure sustainable consumption and production patterns" and Goal 2 "End hunger, achieve food security and improved nutrition, and promote sustainable agriculture" of the United Nations' Sustainable Development Goals (SDGs).

[0056] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0057] 〔summary〕 The cooling system in aspect 1 of the present invention comprises a cooling chamber for cooling the contents and a cold storage device for storing the cold energy of a cryogenic cooling medium supplied from a supply source, wherein the cold storage device is provided within the cooling chamber, or the cooling chamber comprises an inlet for receiving the gas cooled by the cold storage device.

[0058] The cooling system of aspect 2 of the present invention is the same as that of aspect 1, except that it includes a duct cover that surrounds a portion of the periphery of the regenerator, the duct cover including an intake section that takes in gas from the cooling chamber and an exhaust section that exhausts gas cooled by the regenerator, and the cooling system includes a first fan that generates a flow of gas from the intake section to the exhaust section.

[0059] The cooling system of aspect 3 of the present invention is the same as that of aspect 2, and comprises a housing that houses the regenerator surrounded by the duct cover and has an opening for taking in gas from the cooling chamber, and a guide member that guides the gas from the cooling chamber taken in through the opening to the vicinity of the intake section.

[0060] A cooling system according to a fourth aspect of the present invention is the cooling system according to any one of the first to third aspects, further comprising a second fan that circulates gas within the cooling chamber.

[0061] A cooling system according to a fifth aspect of the present invention is the cooling system according to the fourth aspect, further comprising a control device that drives the second fan during a time when the first fan is not driven.

[0062] A cooling system according to a sixth aspect of the present invention is the cooling system according to any one of the first to fifth aspects, further comprising a mechanical cooling device that cools the gas in the cooling chamber.

[0063] A vehicle equipped with the cooling system according to the seventh aspect of the present invention is equipped with the cooling system according to any one of the first to sixth aspects.

[0064] The regenerator according to an eighth aspect of the present invention includes aluminum balls or ceramic balls and a liquid as a refrigerant for storing the cold energy of a cryogenic cooling medium supplied from a supply source. [Explanation of symbols]

[0065] 1 Cold storage 1A~1E Regenerator 2 Flow path 3 Refrigerant 4 Fins 10 Pre-cooling device 11. Housing 12 First Fan 13 Opening 14 Guide member 15 Duct cover 15A Cylindrical part 15B Suction part 15C Discharge section 30 Second Fan 40 Control device 60 Mechanical cooling system 70 Cooling room 71 Introduction 100 Cooling System

Claims

1. a cooling chamber for cooling the contents; a cold storage device that stores the cold energy of the cryogenic cooling medium supplied from the supply source, A cooling system, wherein the regenerator is provided within the cooling chamber, or the cooling chamber has an inlet for receiving gas cooled by the regenerator.

2. a duct cover that surrounds a part of the periphery of the regenerator; The duct cover is an intake section that takes in gas from within the cooling chamber; a discharge unit that discharges the gas cooled by the regenerator, The cooling system of claim 1 , further comprising a first fan for generating a flow of gas from the intake to the exhaust.

3. a housing that houses the regenerator surrounded by the duct cover and has an opening for taking in gas from the cooling chamber; The cooling system according to claim 2 , further comprising a guide member that guides the gas in the cooling chamber taken in through the opening to a position near the intake portion.

4. The cooling system of claim 2 , further comprising a second fan for circulating gas within the cooling chamber.

5. The cooling system according to claim 4 , further comprising a control device that drives the second fan during a time when the first fan is not driven.

6. The cooling system of claim 1 , further comprising a mechanical cooling device for cooling the gas within the cooling chamber.

7. A vehicle equipped with the cooling system according to any one of claims 1 to 6.

8. The regenerator comprises aluminum balls or ceramic balls and a liquid as a refrigerant for storing the cold energy of a cryogenic cooling medium supplied from a supply source.

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