JP6748980B2 - Cool storage device - Google Patents

Description

The present disclosure relates to a cold storage device.

Conventionally, a cold roll box provided with a cold storage device is known. In the cold roll box, for example, articles such as foods are stored in the cold roll box and are loaded and transported on the bed of the delivery vehicle.

Patent Document 1 describes a cold roll box including a cold storage device including a cold storage solvent, a storage unit, a temperature detection unit, a cool storage amount calculation unit, and a display unit. In the cold storage solvent, the additive concentration is adjusted so as to have a predetermined temperature gradient characteristic between the freezing start temperature and the freezing end temperature. The freezing start temperature of the cold storage solvent is, for example, approximately −7° C., and the freezing end temperature of the cold storage solvent is approximately −22° C. The storage unit stores data relating to the temperature gradient characteristic. The temperature detection unit detects the temperature of the cold storage solvent. The cool storage amount calculation unit obtains the cool storage amount based on the detected temperature obtained from the temperature detection unit and the data relating to the temperature gradient characteristic obtained from the storage unit. The display unit displays the cool storage amount calculated by the cool storage amount calculation unit.

JP, 7-318215, A

In some cases, the cool storage device described in Patent Document 1 may not be able to appropriately obtain the cool storage amount. Therefore, the present disclosure provides a cool storage device that can more reliably and appropriately determine the state of the cool storage body.

This disclosure is
A housing having a storage room inside which is partitioned so as to be able to communicate with the cool storage room and the cool storage room;
A plurality of box bodies arranged in the first direction along the bottom surface of the cool storage chamber in the cool storage chamber, each storing a cool storage body;
It is arranged in the storage chamber, and causes a flow of air passing between the boxes along a second direction intersecting the first direction in a plane parallel to the bottom surface of the cold storage chamber to generate the flow of the air. A blower for circulating the air cooled by the regenerator,
The surface temperature of at least one of the boxes, the surface temperature of the regenerator stored in at least one of the boxes, or the internal temperature of the regenerator of at least one of the boxes is defined as A sensor for detecting at a plurality of positions in the direction of 2,
A first projecting portion which projects in the first direction between both ends of the box body in a third direction perpendicular to the bottom surface and defines a flow path of air flowing along the second direction, A first projecting portion including a first surface extending from a position away from both ends of the box body in a third direction toward a first end that is one of the both ends of the box body;
At least one of the plurality of positions is at a specific position overlapping the flow path when the box body is viewed from the first direction,
Provide a cool storage device.

The above-mentioned regenerator can more reliably and properly determine the state of the regenerator.

FIG. 1 is a configuration diagram schematically illustrating an example of the cool storage device of the present disclosure. FIG. 2 is a perspective view illustrating the flow of air in the cold storage chamber. FIG. 3 is a configuration diagram schematically showing a part of the cold storage device shown in FIG. 1. FIG. 4 is a cross-sectional view of the box body taken along line IV-IV in FIG. FIG. 5: is a flowchart which shows operation|movement of a cool storage device. FIG. 6 is a graph showing an example of the temperature detection result by the sensor of the cold storage device. FIG. 7: is a block diagram which shows typically a part of cool storage device which concerns on a modification. FIG. 8: is a block diagram which shows typically a part of cool storage apparatus which concerns on another modification.

The regenerator described in Patent Document 1 is not devised in consideration of the possibility that the temperature of the regenerator solvent spatially varies. Therefore, the cold storage device described in Patent Document 1 may not be able to appropriately obtain the cold storage amount when the temperature of the cold storage solvent varies spatially. Further, in the cold storage device described in Patent Document 1, for example, a cold storage solvent having a freezing start temperature of approximately −7° C. and a freezing end temperature Te of approximately −22° C. is used, and the freezing start temperature Ts and the freezing end temperature are used. The absolute value of the difference from Te reaches approximately 15°C. Therefore, according to the cool storage device described in Patent Document 1, it is easy to obtain the cool storage amount by using the temperature gradient characteristic between the freezing start temperature and the freezing end temperature. However, in the cool storage device described in Patent Document 1, it becomes difficult to appropriately obtain the cool storage amount when the absolute value of the difference between the freezing start temperature and the freezing end temperature becomes small.

The first aspect of the present disclosure is
A housing having a storage room inside which is partitioned so as to be able to communicate with the cool storage room and the cool storage room;
A plurality of box bodies arranged in the first direction along the bottom surface of the cool storage chamber in the cool storage chamber, each storing a cool storage body;
It is arranged in the storage chamber, and causes a flow of air passing between the boxes along a second direction intersecting the first direction in a plane parallel to the bottom surface of the cold storage chamber to generate the flow of the air. A blower for circulating the air cooled by the regenerator,
The surface temperature of at least one of the boxes, the surface temperature of the regenerator stored in at least one of the boxes, or the internal temperature of the regenerator of at least one of the boxes is defined as A sensor for detecting at a plurality of positions in the direction of 2,
A first projecting portion which projects in the first direction between both ends of the box body in a third direction perpendicular to the bottom surface and defines a flow path of air flowing along the second direction, A first projecting portion including a first surface extending from a position away from both ends of the box body in a third direction toward a first end that is one of the both ends of the box body;
At least one of the plurality of positions is at a specific position overlapping the flow path when the box body is viewed from the first direction,
Provide a cool storage device.

According to the first aspect, the blower causes a flow of air passing between the boxes along the second direction. In addition, the sensor detects the surface temperature of the box body, the surface temperature of the regenerator, or the temperature inside the regenerator at a plurality of positions in the second direction. Therefore, the temperature distribution regarding the regenerator in the air flow direction can be obtained. Further, the air intensively flows through the flow path defined by the first protrusion after hitting the first surface. Due to the concentrated flow of air in this flow path, the cold storage material contained in the cool storage body near this flow path melts earlier than in other portions. Since at least one of the plurality of positions where the temperature is detected by the sensor is located at a specific position overlapping the flow path, the temperature detected at the specific position is the melting point of the cold storage material even if the amount of melted cold storage material is small. The above measured values are shown early. Thereby, the temperature distribution regarding the regenerator in the air flow direction, which is obtained by detecting the surface temperature of the box body, the surface temperature of the regenerator, or the temperature inside the regenerator at a plurality of positions in the second direction. However, it changes as the melting amount of the cold storage material increases. Therefore, according to the first aspect, it is possible to measure the temperature indicating the phase change of the cold storage material by the sensor, regardless of the magnitude of the absolute value of the difference between the freezing start temperature and the freezing end temperature of the cold storage material, The state of the regenerator can be appropriately obtained from the result of the temperature measurement.

A second aspect of the present disclosure provides a cool storage device in which, in addition to the first aspect, the first surface is adjacent to the first end. According to the second aspect, since the first surface blocks the flow of air, the air hardly flows near the first end of the box body. This makes it possible to more reliably generate a concentrated air flow in the flow path. As a result, the state of the regenerator can be obtained more reliably and appropriately.

In the third aspect of the present disclosure, in addition to the first aspect or the second aspect, the first surface is adjacent to an upstream end that is an end of the box body on the upstream side of the air flow in the second direction. To provide a cold storage device. According to the third aspect, the air flow can be blocked by the first surface at the end of the box body on the upstream side of the air flow.

In a fourth aspect of the present disclosure, in addition to any one of the first to third aspects, the first surface is an inclined surface that narrows the flow path toward the downstream of the flow of the air. Provide a cool storage device. According to the fourth aspect, it is possible to suppress the generation of vortices in the air flow by the first surface, and it is possible to efficiently circulate the air.

In a fifth aspect of the present disclosure, in addition to any one of the first to fourth aspects, the first protrusion has a cross-sectional area of the flow channel in a plane perpendicular to the second direction, Provided is a regenerator further including a second surface that is fixed in the second direction downstream of one surface in the flow of the air. According to the fifth aspect, the second surface makes the cross-sectional area of the air passage constant, so that the air flow can be stabilized.

In a sixth aspect of the present disclosure, in addition to the fifth aspect, the flow path projects along the second direction by projecting in the first direction between both ends of the box body in the third direction. There is provided a cool storage device further comprising a second projecting portion defined together with the first projecting portion, the second projecting portion including at least a third surface facing the second surface. According to the sixth aspect, even if the size of the box body in the third direction is large, a concentrated air flow is generated in a desired state by appropriately setting the distance between the second surface and the third surface. Easy to make.

In a seventh aspect of the present disclosure, in addition to the sixth aspect, the third surface is between the second end which is the other of the both ends of the box in the third direction and the second surface. The second projecting portion extends away from an upstream end that is an end of the box body on the upstream side of the air flow in the second direction, and the second protrusion is located on the upstream side of the air flow in the second direction. A cool storage device further comprising a fourth surface extending from an end of the third surface toward the second end. According to the seventh aspect, the air flow is blocked by the fourth surface, so that a concentrated air flow can be advantageously formed.

An eighth aspect of the present disclosure is, in addition to any one of the first to seventh aspects,
The liquid state cold storage material included in the cold storage body has a density lower than the density of the solid state cold storage material included in the cold storage body,
The second end is located above the first end,
A distance between the second end and the specific position in the third direction is shorter than a distance between the first end and the specific position in the third direction,
Provide a cool storage device.

According to the eighth aspect, the regenerator material contained in the melted regenerator easily gathers near the second end in the third direction. Therefore, since the distance between the specific position and the first end and the second end of the box body in the third direction is determined as described above, the temperature detected at the specific position is included in the cool storage body. The measured value above the melting point of the cold storage material is shown early. In particular, by causing a concentrated air flow near the second end, the cool storage material contained in the cool storage body near the second end is likely to melt earlier than other portions. The regenerator material that has melted to become a liquid remains near the second end, and the regenerator material in the solid state also remains at a specific place. Therefore, it is possible to prevent the temperature detected by the sensor at the specific position from temporarily lowering due to the mixture of the solid cool storage material and the liquid cool storage material. With this, it is possible to measure the temperature indicating the phase change of the cold storage material, and it is possible to appropriately obtain the state of the cold storage body from the result of the temperature measurement.

A ninth aspect of the present disclosure is, in addition to any one of the first to seventh aspects,
The liquid state cold storage material included in the cold storage body has a density higher than the density of the solid state cold storage material included in the cold storage body,
The first end is located above the second end,
A distance between the second end and the specific position in the third direction is shorter than a distance between the first end and the specific position in the third direction,
Provide a cool storage device.

According to the ninth aspect, the molten regenerator material contained in the regenerator is likely to collect near the second end in the third direction. Therefore, since the distance between the specific position and the first end and the second end of the box in the third direction is determined as described above, the temperature detected at the specific position is the melting point of the cold storage material. The above measured values are shown early. In particular, by causing a concentrated air flow near the second end, the cold storage material near the second end is more likely to melt earlier than the other parts. The regenerator material that has melted to become a liquid remains near the second end, and the regenerator material in the solid state also remains at a specific place. Therefore, it is possible to prevent the temperature detected by the sensor at the specific position from temporarily lowering due to the mixture of the solid cool storage material and the liquid cool storage material. With this, it is possible to measure the temperature indicating the phase change of the cold storage material, and it is possible to appropriately obtain the state of the cold storage body from the result of the temperature measurement.

A tenth aspect of the present disclosure is, in addition to any one of the first to ninth aspects,
Information indicating the temperature detected by the sensor is input, and at the plurality of positions, the surface temperature of the box body, the surface temperature of the regenerator stored in the box body, or the box body. A controller that generates state information indicating the state of the regenerator based on information indicating the internal temperature of the regenerator,
Further comprising a display unit for displaying the status information,
Provide a cool storage device.

According to the tenth aspect, it is possible to appropriately generate the state information indicating the state of the regenerator and then display the state information.

The eleventh aspect of the present disclosure is
A housing having a storage room inside which is partitioned so as to be able to communicate with the cool storage room and the cool storage room;
A plurality of box bodies arranged in the first direction along the bottom surface of the cool storage chamber in the cool storage chamber, each storing a cool storage body;
It is arranged in the storage chamber, and causes a flow of air passing between the boxes along a second direction intersecting the first direction in a plane parallel to the bottom surface of the cold storage chamber to generate the flow of the air. A blower for circulating the air cooled by the regenerator,
The surface temperature of at least one of the boxes, the surface temperature of the regenerator stored in at least one of the boxes, or the internal temperature of the regenerator of at least one of the boxes is defined as A sensor for detecting at a plurality of positions in the direction of 2,
At least one of the plurality of boxes is a heat transfer surface defined apart from a first end that is one of both ends of the box in a third direction perpendicular to the bottom surface, and in the third direction. An outer surface including a heat insulating surface defined adjacent to the heat transfer surface,
At least one of the plurality of positions is at a specific position overlapping the heat transfer surface when the box body is viewed from the first direction,
Provide a cool storage device.

According to the eleventh aspect, the flow of air is hardly cooled on the heat insulating surface and is cooled on the heat transfer surface, so that the cool storage material contained in the cool storage body near the heat transfer surface melts earlier than other parts. To do. Since at least one of the plurality of positions where the temperature is detected by the sensor is located at a specific position overlapping with the heat transfer surface, the temperature detected at the specific position is equal to the temperature of the cool storage material even if the amount of melted cool storage material is small. Measured values above the melting point are shown early. Thereby, the temperature distribution regarding the regenerator in the air flow direction, which is obtained by detecting the surface temperature of the box body, the surface temperature of the regenerator, or the temperature inside the regenerator at a plurality of positions in the second direction. However, it changes as the melting amount of the cold storage material increases. Therefore, according to the eleventh aspect, it is possible to measure the temperature indicating the phase change of the cold storage material by the sensor, regardless of the magnitude of the absolute value of the difference between the freezing start temperature and the freezing end temperature of the cold storage material, The state of the regenerator can be appropriately obtained from the result of the temperature measurement.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the following description relates to examples of the present invention, and the present invention is not limited to these. In the attached drawings, the X-axis indicates the same direction, the Y-axis indicates another same direction orthogonal to the X-axis, and the Z-axis indicates the direction orthogonal to the X-axis and the Y-axis. The XY plane is horizontal. The components described without reference to the X-axis, Y-axis, and Z-axis can be placed in suitable positions if desired.

As shown in FIGS. 1 and 2, the cool storage device 100 a includes a housing 55, a plurality of boxes 11, a blower 20, a sensor 12, and a first protrusion 25. The housing 55 has the cold storage chamber 15 and the storage chamber 50 inside. The storage room 50 is a space partitioned so as to be able to communicate with the cold storage room 15. The plurality of boxes 11 are arranged in the cool storage chamber 15 along the bottom surface of the cool storage chamber 15 in the first direction (Y-axis direction). As shown in FIG. 3, the cool storage body 10 is housed in each of the plurality of boxes 11. The blower 20 is arranged in the storage room 50. The blower 20 is a flow of air passing between the box bodies 11 along a second direction (X-axis direction) intersecting the first direction (Y-axis direction) in a plane parallel to the bottom surface of the cold storage chamber 15. And the air cooled by the regenerator 10 is circulated. The sensor 12 may be the surface temperature of the at least one box 11, the surface temperature of the regenerator 10 housed in the at least one box 11, or the inside temperature of the regenerator 10 housed in the at least one box 11. The temperature is detected at a plurality of positions in the second direction (X-axis direction). The first projecting portion 25 projects in the first direction (Y-axis direction) between both ends of the box body 11 in the third direction (Z-axis direction) perpendicular to the bottom surface of the cold storage chamber 15 and projects in the second direction ( A flow path 17 for air flowing along the (X-axis direction) is defined. The first protrusion 25 includes a first surface 25f. The first surface 25f extends from a position apart from both ends of the box body 11 in the third direction (Z-axis direction) toward the first end 11a which is one of both ends of the box body 11. As shown in FIG. 3, at least one of the plurality of positions where the temperature is detected by the sensor 12 (three in FIG. 3) is the air flow path 17 when the box 11 is viewed from the first direction. It is in a specific position where it overlaps.

The arrows in FIGS. 1 and 2 conceptually show the flow of air generated by the operation of the blower 20. The blower 20 causes a flow of air passing between the box bodies 11 along the second direction (X-axis direction). In addition, the sensor 12 detects the surface temperature of the box 11, the surface temperature of the regenerator 10, or the temperature inside the regenerator 10 at a plurality of positions in the second direction (X-axis direction). For this reason, the temperature distribution regarding the regenerator 10 in the air flow direction can be obtained. Further, the air, after hitting the first surface 25f, intensively flows through the flow path 17 defined by the first protruding portion 25. Due to the concentrated flow of air in the flow passage 17, the cool storage material contained in the cool storage body 10 near the flow passage 17 melts earlier than other portions. Since at least one of the plurality of positions where the temperature is detected by the sensor 12 is located at a specific position overlapping the flow path, even if the melted amount of the cool storage material contained in the cool storage body 10 is small, it is detected at the specified position. The measured value of the temperature above the melting point of the cold storage material is shown early. Thereby, the air flow obtained by detecting the surface temperature of the box body 11, the surface temperature of the regenerator body 10, or the temperature inside the regenerator body 10 at a plurality of positions in the second direction (X-axis direction). The temperature distribution of the regenerator 10 in the direction changes as the melting amount of the regenerator material increases. Therefore, according to the regenerator 100a, the sensor 12 can measure the temperature indicating the phase change of the regenerator 10 regardless of the magnitude of the absolute value of the difference between the freezing start temperature and the freezing end temperature of the regenerator 10. Therefore, the state of the regenerator 10 can be appropriately obtained from the result of the temperature measurement.

As shown in FIG. 3, for example, the first surface 25f of the first protrusion 25 is adjacent to the first end 11a. In this case, since the first surface 25f blocks the flow of air, almost no air flows near the first end 11a of the box body 11 downstream of the first surface 25f of the flow path 17. This makes it possible to more reliably generate a concentrated air flow in the flow path 17. As a result, the state of the regenerator 10 can be obtained more reliably and appropriately.

As shown in FIG. 3, for example, the first surface 25f of the first protrusion 25 is adjacent to the upstream end 11u, which is the end of the box 11 on the upstream side of the air flow in the second direction (X-axis direction). ing. In this case, the air flow can be interrupted by the first surface 25f at the end of the box body 11 on the upstream side of the air flow.

As shown in FIG. 3, a part of the first surface 25f is in contact with the upstream end 11u. The entire first surface 25f may be in contact with the upstream end 11u. The first surface 25f of the first projecting portion 25 may be defined at the end of the box body 11 on the upstream side of the air flow, away from the upstream end 11u in the second direction.

As shown in FIG. 3, for example, the first surface 25f of the first protrusion 25 is an inclined surface that narrows the flow path 17 toward the downstream side of the air flow. In this case, the first surface 25f can suppress the generation of vortices in the air flow, and the air can be efficiently circulated.

As shown in FIG. 3, for example, the first protrusion 25 further has a second surface 25s. The second surface 25 s has a cross-sectional area of the air flow path 17 in a plane perpendicular to the second direction (X-axis direction), which is downstream of the first surface 25 in the second direction (X-axis direction). Direction) fixed. For example, the second surface 25s extends in the second direction (X-axis direction) from the end of the first surface 25f on the downstream side of the air flow. As a result, the concentrated air flow is easily stabilized in the flow path 17 defined by the second surface 25s.

As shown in FIG. 1, the second surface 25s extends, for example, from the end of the first surface 25f on the downstream side of the air flow to the vicinity of the center of the box body 11 in the second direction (X-axis direction). The first projecting portion 25 is arranged near the upstream end 11u of the box body 11 in the second direction (X-axis direction). Since the temperature of the air contacting the end of the box body 11 on the upstream side of the air flow tends to be relatively high, the regenerator near the flow path 17 is likely to be melted early. The length of the second surface 25s in the second direction (X-axis direction) is, for example, large with respect to the heat exchange area between the air and the box body 11 and the temperature change due to melting of the cool storage material contained in the cool storage body 10. It is determined by the balance with the area to be set. For example, when the heat exchange area between the air and the box 11 is sufficient, the second surface 25s has a downstream end that is the end of the box 11 on the downstream side of the air flow in the second direction (X-axis direction). It may extend to a position between 11d and the center of the box body 11 in the second direction.

As shown in FIG. 3, the regenerator 100a further includes, for example, a second protrusion 26. The second projecting portion 26 projects in the first direction (Y-axis direction) between both ends of the box body 11 in the third direction (Z-axis direction). The second protrusion 26 defines the flow path 17 along with the first protrusion 25 along the second direction (X-axis direction). The second protrusion 26 includes at least a third surface 26t that faces the second surface 25s. Thereby, even if the size of the box body 11 in the third direction (Z-axis direction) is large, a concentrated air flow is desired by appropriately determining the distance between the second surface 25s and the third surface 26t. It is easy to cause in the state of.

As shown in FIG. 3, the third surface 26t is, for example, between the second end 11b which is the other end of the box body 11 in the third direction (Z-axis direction) and the second surface 25s. It extends away from the upstream end 11u. In this case, as shown in FIG. 3, the second protrusion 26 further includes, for example, the fourth surface 26f. The fourth surface 26f extends from the end of the third surface 26t on the upstream side of the air flow in the second direction (X-axis direction) toward the second end 11b. Since the air flow is blocked by the fourth surface 26f, a concentrated air flow can be advantageously formed.

In FIG. 3, the first end 11a and the second end 11b correspond to the lower end and the upper end of the box body 11, respectively, but the first end 11a and the second end 11b respectively correspond to the upper end and the upper end of the box body 11, respectively. It may correspond to the lower end.

As shown in FIG. 3, the cold storage device 100 a further includes a controller 30 and a display unit 40. Information indicating the temperature detected by the sensor 12 is input to the controller 30. The controller 30 indicates the surface temperature of the box body 11, the surface temperature of the regenerator body 10 housed in the box body 11, or the temperature inside the regenerator body 10 housed in the box body 11 at a plurality of positions. State information indicating the state of the cool storage body 10 is generated based on the information. The display unit 40 displays the status information generated by the controller 30. Thereby, the appropriate state information of the cool storage body 10 can be displayed.

The controller 30 is connected to the sensor 12 so as to be able to communicate by wire or wirelessly. Therefore, information indicating the temperature detected by the sensor 12 is input to the controller 30. The controller 30 is configured as a computer including, for example, an interface for inputting/outputting information, a computing device such as a CPU, a main storage device such as a memory, and an auxiliary storage device such as a hard disk drive. When information indicating the temperature detected by the sensor 12 is input to the controller 30 via the interface, the arithmetic unit generates this information and state information indicating the state of the regenerator 10 stored in the auxiliary storage device. And a program for doing so are used to generate state information. The state information is temporarily stored in the main storage device. As shown in FIG. 3, the controller 30 and the display unit 40 are connected by a communication cable. The display unit 40 is not particularly limited, but is, for example, a liquid crystal display or an organic EL display. The display unit 40 is arranged, for example, on the outer peripheral surface of the housing 55 of the cool storage device 100a. The status information temporarily stored in the main storage device is output to the display unit 40 via the interface and the communication cable.

As shown in FIG. 4, in the regenerator 10, for example, the regenerator material 10a is sealed in a film container 10b. The cold storage body 10 can store cold heat in the form of latent heat by cooling and solidifying the liquid cold storage material 10a, for example. The cold storage material 10a is not particularly limited, but is, for example, a mixture containing sodium chloride to which sodium chloride is added at a predetermined concentration and water. The absolute value of the difference between the crystal start temperature of the cold storage material 10a and the crystal end temperature of the cold storage material 10b is not particularly limited, but is 2° C. or less, for example. The film forming the container 10b is, for example, a laminated film including an aluminum layer and two or more resin layers arranged on both sides of the aluminum layer in the thickness direction.

Since the controller 30 of the cold storage device 100 generates the state information indicating the state of the cold storage body 10 as described above, the difference between the crystallization start temperature of the cold storage material 10a and the crystallization end temperature of the cold storage material 10a is relatively large. Even if it is small, the state of the regenerator 10 can be appropriately obtained. When the difference between the crystallization start temperature of the cold storage material 10a and the crystallization end temperature of the cold storage material 10a is relatively small, for example, when the allowable range of the cold storage temperature allowed to cool the article is narrow, It can be used to advantage.

As shown in FIG. 2, for example, the plurality of box bodies 11 are the second of the first direction (Y-axis direction), the second direction (X-axis direction), and the third direction (Z-axis direction). Has the largest dimension in the direction (X-axis direction). As a result, the entire melted state of the cold storage material 10a tends to vary in the second direction. Further, the period in which the air flow passes through the space between the box bodies 11 in the second direction is likely to be long, and the air introduced into the space between the box bodies 11 is likely to be reliably cooled. In addition, since the pressure loss generated in the flow of the air flowing through the space between the box bodies 11 is relatively large, the air is likely to be uniformly guided to the plurality of spaces in which the air flow occurs.

The box body 11 is not particularly limited, but has, for example, a rectangular parallelepiped outer shape elongated in the second direction (X-axis direction) as shown in FIGS. 1 and 2. The box body 11 may be configured by a plurality of components that can be combined in the first direction (Y-axis direction) in consideration of ease of assembly. The material forming the box 11 is not particularly limited, but is, for example, a metal such as aluminum or an alloy. In this case, the cold heat of the regenerator 10 is easily transferred to the air flowing near the box 11.

The number of the plurality of boxes 11 arranged in the cold storage chamber 15 is not particularly limited, but is based on parameters such as the amount of cold heat required for the cold storage device 100a, the size of the cold storage body 10, and the height of the cold storage chamber 15, for example. Be determined appropriately. Further, the number of the plurality of boxes 11 arranged in the cool storage chamber 15 is preferably determined so that a heat exchange area between the air flowing through the cool storage chamber 15 and the boxes 11 is sufficiently secured. Further, the number of the plurality of box bodies 11 arranged in the cold storage chamber 15 is preferably such that the pressure loss generated in the air flow in the air flow path defined between the box bodies 11 is kept at an appropriate level. Determined to lean.

The first protruding portion 25 and the second protruding portion 26 are, for example, plate-shaped members. In this case, it is easy to reduce the weight of the first protrusion 25 and the second protrusion 26. Each of the first protruding portion 25 and the second protruding portion 26 may be, for example, a block-shaped member. The materials of the first protruding portion 25 and the second protruding portion 26 are not particularly limited, but from the viewpoint of efficiently cooling the air, it is preferable that the material is a metal or alloy such as aluminum. The first projecting portion 25 and the second projecting portion 26 may each be integrally formed with the main body of the box body 11 by welding, or may be detachable from the main body of the box body 11. Good.

As shown in FIG. 2, one of the two box bodies 11 has the first protruding portion 25 between the two adjacent box bodies 11. In this case, the dimension of the first protruding portion 25 in the first direction (Y-axis direction) is, for example, 80 to 95% of the interval between the adjacent box bodies 11. Between the two adjacent box bodies 11, one of the two box bodies 11 has the second protruding portion 26. In this case, the dimension of the second protruding portion 26 in the first direction (Y-axis direction) is, for example, 80 to 95% of the distance between the adjacent box bodies 11. In this case, since the flow passage 17 can be defined in a closed state in many directions, a concentrated air flow can be advantageously formed in the flow passage 17. Both of the two box bodies 11 may have the first protrusion 25 between the two adjacent box bodies 11. In this case, the sum of the dimensions of the first protruding portions 25 of the two box bodies 11 in the first direction (Y-axis direction) is in the above range, for example. Both of the two box bodies 11 may have the second protrusion 26 between the two adjacent box bodies 11. In this case, the sum of the dimensions of the second protrusions 26 of the two box bodies 11 in the first direction (Y-axis direction) is in the above range, for example.

At least one box body 11 whose temperature is to be detected by the sensor 12 may house a single regenerator body 10, but desirably, in the second direction (X-axis direction), as shown in FIG. A plurality of (two in FIG. 3) arranged cool storage bodies 10 are stored. For example, a predetermined gap is defined between the plurality of cool storage bodies 10. As described above, the container 10b of the cool storage body 10 may be formed of, for example, a film including an aluminum layer. Therefore, when the box body 11 stores a single regenerator body 10, the regenerator body 10 is provided at a specific location in the second direction (X-axis direction) of the regenerator body 10 at a location near the particular location. The heat that it has is easily transferred through the container 10b. On the other hand, if the box body 11 accommodates the plurality of regenerator bodies 10 arranged in the second direction (X-axis direction), this particular regenerator body 10 among the plurality of regenerator bodies 10 is identified. The heat of another cool storage body 10 adjacent to the cool storage body 10 is difficult to be transferred. Therefore, the temperature of the specific regenerator 10 is unlikely to be affected by the heat of another regenerator 10 adjacent to the particular regenerator 10, and the state of the regenerator 10 can be advantageously obtained.

The sensor 12 is not particularly limited, but is, for example, a contact-type temperature sensor having a thermocouple or a thermistor or a non-contact-type temperature sensor having a thermopile. As shown in FIG. 3, the sensors 12 are respectively arranged at a plurality of positions in the second direction (X-axis direction), for example. For example, six sensors 12 are arranged corresponding to three different positions in the second direction (X-axis direction) for each of the two regenerator bodies 10 housed in the box body 11. The six sensors 12 are arranged, for example, at specific intervals in the X-axis direction. When the sensor 12 is a non-contact temperature sensor having a wide measurement viewing angle or a non-contact temperature sensor having a movable viewing angle, one sensor 12 is used to make a plurality of sensors in the second direction (X-axis direction). The temperature of the object may be detected at the position. When the surface temperature of the regenerator 10 is measured using the sensor 12 which is a non-contact temperature sensor, the box 11 preferably has an opening for detecting the surface temperature of the regenerator 10. ..

The sensor 12 desirably detects the surface temperature of the at least one box 11 or the surface temperature of the regenerator 10 housed in the at least one box 11. In this case, since it is not necessary to install the sensor 12 inside the regenerator 10, leakage of the regenerator material 10a due to a seal defect in the regenerator 10 is unlikely to occur. Further, even when the regenerator 10 needs to be replaced, the installation work of the sensor 12 can be simplified or the installation work of the sensor 12 can be made unnecessary.

The sensor 12 is installed on the surface of the regenerator 10 or the surface of the box 11, for example. In other words, the sensor 12 is in contact with the surface of the regenerator 10 or the surface of the box 11. In this case, since there is almost no gap between the surface of the regenerator 10 or the surface of the box 11 and the sensor 12, the temperature detection by the sensor 12 is performed between the surface of the regenerator 10 or the surface of the box 11 and the sensor 12. Foreign matter that hinders Therefore, the surface temperature of the regenerator 10 or the surface temperature of the box 11 can be detected more reliably. For example, as shown in FIG. 4, the sensor 12 is installed on the surface of the regenerator 10.

As shown in FIG. 1, the regenerator 100a includes, for example, a cold air duct 21, a floor plate 60, and a refrigeration cycle device 70. A floor plate 60 divides the internal space of the cold storage device 100 a into a cold storage chamber 15 and a storage chamber 50. For example, the cold storage chamber 15 is defined below the floor plate 60 (Z axis negative direction), and the storage chamber 50 is defined above the floor plate 60 (Z axis positive direction). The storage room 50 is a space for storing articles such as foods that need to be kept cold. For example, a gap is defined between a part of the end of the floor plate 60 and the wall surface defining the storage chamber 50, and the cool storage chamber 15 and the storage chamber 50 communicate with each other through this gap.

The blower 20 is disposed on the side surface of the storage chamber 50 near the ceiling surface of the storage chamber 50, for example. The cool air duct 21 connects the cool storage chamber 15 and the space behind the blower 20. When the blower 20 operates, the air passes through the space in contact with the box body 11 including the flow path 17. At this time, the regenerator 10 cools the air. The cooled air is guided to the space behind the blower 20 through the inside of the cool air duct 21, and is blown into the storage chamber 50 by the blower 20. As a result, the articles stored in the storage room 50 are kept cool. Part of the air inside the storage chamber 50 is guided to the cold storage chamber 15 through a gap defined between a part of the end of the floor plate 60 and the wall surface defining the storage chamber 50.

In FIG. 1, the box 11 has a first projecting portion 25 and a second projecting portion 26. However, the first projecting portion 25 and the second projecting portion 26 may be configured by members different from the box body 11, or the bottom surface of the cold storage chamber 15 or the floor plate 60. Instead of the second protruding portion 26, the flow path 17 may be defined by the first protruding portion 25 and the bottom surface of the cold storage chamber 15 or the floor plate 60.

The refrigeration cycle device 70 includes an evaporator 71, a compressor 72, a condenser 73, and an expansion valve 74. The evaporator 71, the compressor 72, the condenser 73, and the expansion valve 74 are annularly connected by piping so that the refrigerant passes through in this order. The evaporator 71 is configured by, for example, a pipe extending in contact with the outer surface of each of the plurality of box bodies 11. When the refrigeration cycle device 70 is operated, the refrigerant flowing through the evaporator 71 and the air in the cold storage chamber 15 exchange heat with each other, whereby the air in the cold storage chamber 15 is cooled. The temperature of the refrigerant in the evaporator 71 is lower than the crystallization end temperature of the cold storage material 10a. Therefore, the cold storage material 10a in the liquid state is solidified and cold heat is stored in the cold storage body 10. The refrigeration cycle device 70 is used to store cold heat in the regenerator 10 before keeping the article cold in the storage chamber 50. Therefore, the refrigeration cycle device 70 is normally stopped while the article is kept cold in the storage chamber 50.

The cold storage device 100a may not include the refrigeration cycle device 70 in some cases. For example, a plurality of boxes 11 accommodating the regenerator 10 in a state where cold energy is stored by another refrigeration cycle device may be arranged in the regenerator 15. In this case, the plurality of boxes 11 can be attached to and detached from the cool storage device 100a, for example.

Next, an example of the operation of the cool storage device 100a for displaying the state information of the cool storage body 10 will be described. This operation is not particularly limited, but, for example, using the blower 20, a flow of air passing through the space defined between the box bodies 11 is generated, and the air cooled by the regenerator 10 is circulated. It is carried out during the period. This operation may be performed when the refrigeration cycle device 70 is operated and cold heat is stored in the regenerator 10, even when the blower 20 is stopped. As shown in FIG. 5, when a predetermined condition is satisfied, the cold storage device 100a starts an operation for displaying the state of the cold storage body 10. Here, although the predetermined condition is not particularly limited, for example, a predetermined time has elapsed from the start of operation of the blower 20 or the refrigeration cycle device 70, and the controller 30 is required to display the state information of the regenerator 10. The information to be entered is input. The cool storage device 100 may periodically perform an operation for displaying the state information of the cool storage body 10.

First, in step S1, the sensor 12 detects the surface temperature of the box body 11, the surface temperature of the regenerator 10, or the temperature inside the regenerator 10 at a plurality of positions in the second direction (X-axis direction). Here, the surface temperature of the box body 11 is the surface temperature of at least one box body 11. The surface temperature of the regenerator 10 is the surface temperature of the regenerator 10 housed in at least one box 11. The temperature inside the regenerator 10 is the temperature inside the regenerator 10 housed in at least one box 11.

Next, in step S2, the controller 30 acquires information indicating the temperature detected by the sensor 12. This information includes information indicating the surface temperature of the box 11, the surface temperature of the regenerator 10, or the temperature inside the regenerator 10 at a plurality of positions in the second direction (X-axis direction).

Next, in step S3, the controller 30 controls the surface temperature of the box body 11, the surface temperature of the regenerator 10, or the temperature inside the regenerator 10 at a plurality of positions in the second direction (X-axis direction). The amount of cold storage of the regenerator 10 is calculated on the basis of the information indicating that the state information including the calculated amount of cool storage is generated. Next, in step S4, the state information generated by the controller 30 is output to the display unit 40, the display unit 40 displays the state information, and the series of operations ends.

In addition to the cool storage amount, the state information displayed on the display unit 40 may be a coolable time or a time required until a predetermined amount of the cool storage body 10 among the cool storage bodies 10 included in the cool storage apparatus 100a is solidified.

The cool storage amount corresponds to, for example, the proportion of the capacity of the cool storage body 10 having a temperature equal to or lower than a predetermined threshold value to the total capacity of the cool storage body 10 housed in the box 11. The controller 30 is based on, for example, information indicating the surface temperature of the box body 11, the surface temperature of the regenerator 10, or the temperature inside the regenerator 10 at a plurality of positions in the second direction (X-axis direction). Then, the spatial temperature distribution of the regenerator 10 is estimated. In this case, the controller 30 calculates the cool storage amount based on the ratio of the portion of the estimated temperature distribution that exceeds the predetermined threshold value. For example, consider a case where the temperature is detected by the sensor 12 at 10 locations that are located at equal intervals in the second direction (X-axis direction) on at least one box 11. Further, it is assumed that the temperature detected by each of the 10 locations where the temperature is detected by the sensor 12 represents the temperature of the regenerator 10 having the same volume. When the blower 20 is operating, the cold heat of the regenerator 10 is consumed first from the upstream side of the air flow, so the temperature of the regenerator 10 varies from the upstream position of the air flow to the downstream of the air flow. The threshold value is sequentially exceeded to the side position. For example, if one of the 10 locations where the temperature is detected by the sensor 12 exceeds the threshold value, the controller 30 increases from the upstream location of the air flow to the downstream location of the air flow. Reduce the amount of cold storage by 10%. However, the algorithm for calculating the amount of cold storage is not limited to this, based on the proportion of the portion of the estimated temperature distribution that exceeds the predetermined threshold value. The algorithm for calculating the cool storage amount may be appropriately determined according to the number of locations where the temperature is measured by the sensor 12, the position where the temperature is measured by the sensor 12, and the structure of the cool storage body 10 or the box body 11. The predetermined threshold value is determined based on, for example, the melting point of the cold storage material 10a. Further, when there is a difference between the crystallization start temperature of the cold storage material 10a and the crystallization end temperature of the cold storage material 10a, the predetermined threshold value is set as a temperature range having an upper limit value and a lower limit value. Good.

It is assumed that the six sensors 12 shown in FIG. 3 have obtained the detection results shown in FIG. The dashed-dotted line in the graph of FIG. 6 shows a predetermined threshold value, and the predetermined threshold value is defined as a specific temperature range having an upper limit value and a lower limit value. In this case, the cold storage material 10a changes from a solid to a liquid in this specific temperature range. Each plot in FIG. 6 shows the temperature detected by the six sensors 12 shown in FIG. As shown in FIG. 6, the temperature detected by two of the six sensors 12, which are located upstream of the air flow, exceeds a predetermined threshold value. Specifically, the temperature detected by the two sensors 12 located upstream of the air flow exceeds the upper limit value of the predetermined threshold value. On the other hand, among the six sensors 12, the temperature detected by the four sensors 12 located on the downstream side of the air flow is equal to or lower than the upper limit value of the predetermined threshold value. As described above, the controller 30 estimates the spatial temperature distribution in the regenerator 10, as shown in FIG. 6, based on the information indicating the temperatures detected by the six sensors 12. The controller 30 calculates the cold storage amount based on the proportion of the portion of the estimated temperature distribution that exceeds the upper limit of the predetermined threshold value.

The cool keeping time means, for example, a time during which the air passing through the cool storage chamber 15 can be cooled to a predetermined temperature or lower by the cool storage body 10. The coolable time can be obtained, for example, based on the amount of cold heat and the amount of cold storage per unit time released from the inside of the cold storage device 100a to the outside of the cold storage device 100a. The amount of cold heat released per unit time from the inside of the cold storage device 100a to the outside of the cold storage device 100a is determined based on, for example, the difference between the temperature outside the cold storage device 100a and the temperature inside the internal space of the cold storage device 100a. .. In this case, for example, a temperature sensor (not shown) is arranged outside the storage chamber 50 and the housing 55 of the cold storage device 100a, and information indicating the temperature detected by the temperature sensor is input to the controller 30. The controller 30, for example, based on this information, calculates the amount of cold heat released from the inside of the cold storage device 100a to the outside of the cold storage device 100a per unit time, and then calculates the coolable time. The coolable time is, for example, A/B when the amount of cold storage is A[J] and the amount of cold heat released from the inside of the cold storage device 100a to the outside of the cold storage device 100a per unit time is B[W]. Calculated as [seconds]. Further, the controller 30 may calculate the coolable time based on the time required to consume the cold heat stored in the cool storage body 10 up to a predetermined cool storage amount. For example, when the time required from the start of the operation of the blower 20 to the time when the cool storage amount of the cool storage body 10 housed in the box body 11 is halved is 1 hour, the coolable time is calculated as “1 hour”. May be done.

The controller 30 solidifies a predetermined amount of the regenerator 10 among the regenerators 10a included in the regenerator 100a when the refrigeration cycle device 70 stores cold heat in the regenerator 10 in a liquid state. The time required until is calculated as state information indicating the state of the cold storage body 10. The predetermined amount of the regenerator 10 may be all of the regenerator 10 included in the regenerator 100a or a part of the regenerator 10 included in the regenerator 100a. For example, the controller 30 can calculate the time required for the entire regenerator 10 to solidify based on the cooling capacity and the amount of regenerator of the evaporator 71. The cooling capacity of the evaporator 71 is stored in the controller 30, for example. The time required until the entire regenerator 10 solidifies is, for example, the amount of cold storage is C [J], and the amount of cold heat stored in the regenerator 10 when the entire regenerator 10 is solid is D [J]. If the cooling capacity of the evaporator 71 is E [W], it is calculated as (D−C)/E [second]. Moreover, the controller 30 may calculate the time required until the entire regenerator 10 is solidified, based on the time required to store cold heat in the regenerator 10 up to a predetermined amount of regenerator. For example, when the time required from the start of the operation of the refrigeration cycle apparatus 70 until the amount of cold storage becomes half is 1 hour, the time required until the entire regenerator 10 is solidified is calculated as “1 hour”. Good.

In this way, since the cool storage possible time can be calculated by the controller 30, the cool storage device 100a can be efficiently operated according to the calculated cool storage possible time. Further, since the controller 30 can calculate the time required for the regenerator 10 to solidify, it is possible to predict the time when the operation of storing the cold heat to the regenerator 10 ends, and to operate the regenerator 100a systematically.

(Modification)
The regenerator 100a can be modified from various viewpoints. For example, the cold storage device 100b or the cold storage device 100c shown in FIG. 7 or 8 may be changed. The regenerator 100b or the regenerator 100c is configured in the same manner as the regenerator 100a, unless otherwise specified. The same reference numerals are given to the components of the cold storage device 100b and the cold storage device 100c that are the same as or correspond to the components of the cold storage device 100a, and detailed description thereof will be omitted. The description regarding the cool storage device 100a also applies to the cool storage device 100b and the cool storage device 100c unless technically contradictory.

In the regenerator 100b, the liquid state regenerator material 10a included in the regenerator 10 has a smaller density than the solid state regenerator material 10a included in the regenerator 10. In this case, the regenerator 10 contains paraffin as the regenerator material 10a, for example. In the cool storage device 100b, the second end 11b is located above the first end 11a. That is, the first end 11a and the second end 11b correspond to the lower end and the upper end of the box body 11, respectively. In the cold storage device 100b, a position where at least one of the plurality of positions where the temperature is detected by the sensor 12 and which overlaps the flow path 17 when the box 11 is viewed from the first direction is defined as a specific position. .. The distance between the second end 11b and the specific position in the third direction (Z-axis direction) is shorter than the distance between the first end 11a and the specific position in the third direction (Z-axis direction).

In the cool storage device 100b, the melted cool storage material 10a tends to collect near the second end 11b in the third direction (Z-axis direction). Therefore, the distance between the specific position and the first end 11a and the second end 11b of the box 11 in the third direction (Z-axis direction) is determined as described above, and thus the detection is performed at the specific position. The measured value shows the measured value above the melting point of the cold storage material 10a at an early stage. In particular, by causing a concentrated air flow near the second end 11b, the regenerator material 10a near the second end 11b is likely to melt earlier than other portions. For example, as shown in FIG. 7, the second surface 25s of the first protrusion 25 defines the flow path 17 closer to the second end 11b than the center of the box body 11 in the third direction (Z-axis direction). There is. Thereby, it is easy to generate a concentrated air flow near the second end 11b. Further, the third surface 26t of the second protrusion 26 extends in the second direction (X-axis direction) from the upstream end 11u of the box body 11 adjacent to the second end 11b. The regenerator material 10a that has melted to become a liquid remains near the second end, and the regenerator material 10a in the solid state also remains at a specific place. Therefore, it is possible to suppress a temporary decrease in the temperature detected by the sensor 12 at the specific position due to the mixture of the solid cool storage body 10 and the liquid cool storage body 10. Accordingly, it is possible to measure the temperature indicating the phase change of the cold storage material 10a, and the state of the cold storage body 10 can be appropriately obtained from the result of the temperature measurement.

In the regenerator 100c, the liquid state regenerator material 10a included in the regenerator 10 has a density higher than that of the solid state regenerator material 10a included in the regenerator 10. In this case, the cool storage body 10 contains water as the cool storage material 10a, for example. In the cool storage device 100c, as shown in FIG. 8, the first end 11a is located above the second end 11b. That is, the first end 11a and the second end 11b correspond to the upper end and the lower end of the box body 11, respectively. In the cold storage device 100c, a position where at least one of a plurality of positions where the temperature is detected by the sensor 12 and which overlaps the flow path 17 when the box 11 is viewed from the first direction is defined as a specific position. .. The distance between the second end 11b and the specific position in the third direction (Z-axis direction) is shorter than the distance between the first end 11a and the specific position in the third direction (Z-axis direction).

In the cool storage device 100c, the melted cool storage material 10a is likely to collect near the second end 11b in the third direction (Z-axis direction). Therefore, the distance between the specific position and the first end 11a and the second end 11b of the box 11 in the third direction (Z-axis direction) is determined as described above, and thus the detection is performed at the specific position. The measured value shows the measured value above the melting point of the cold storage material 10a at an early stage. In particular, by causing a concentrated air flow near the second end 11b, the regenerator material 10a near the second end 11b is likely to melt earlier than other portions. For example, as shown in FIG. 8, the second surface 25s of the first protrusion 25 defines the flow path 17 closer to the second end 11b than the center of the box body 11 in the third direction (Z-axis direction). There is. Thereby, it is easy to generate a concentrated air flow near the second end 11b. Further, the third surface 26t of the second protrusion 26 extends in the second direction (X-axis direction) from the upstream end 11u of the box body 11 adjacent to the second end 11b. The regenerator material 10a that has melted to become a liquid remains near the second end 11b, and the regenerator material 10a in the solid state also remains at a specific place. Therefore, it is possible to prevent the temperature detected by the sensor 12 from temporarily lowering at the specific position due to the mixture of the solid cool storage material 10a and the liquid cool storage material 10a. Accordingly, it is possible to measure the temperature indicating the phase change of the cold storage material 10a, and the state of the cold storage body 10 can be appropriately obtained from the result of the temperature measurement.

The cool storage device 100a may not include the first protruding portion 25 and the second protruding portion 26, and the outer surface of the box body 11 may be modified to have a heat insulating surface at a predetermined position. The cool storage device according to this modification differs from the cool storage device 100a in that at least one of the plurality of boxes 11 has an outer surface including a heat transfer surface and a heat insulating surface. Here, the heat transfer surface is defined apart from the first end 11a which is one of both ends of the box body 11 in the third direction (Z-axis direction). The heat insulating surface is defined adjacent to the heat transfer surface in the third direction (Z-axis direction). In addition, in the cool storage device according to this modification, at least one of the plurality of positions in the two directions (X-axis direction) in which the temperature is detected by the sensor 12 moves the box body 11 from the first direction (Y direction). When viewed, it is different from the regenerator 100a in that it is located at a specific position overlapping the heat transfer surface.

INDUSTRIAL APPLICABILITY The cool storage device of the present disclosure can be used for applications in which cold heat is temporarily stored in refrigeration or freezing.

10 Regenerator 10a Regenerator material 11 Box 11a First end 11b Second end 11u Upstream end 12 Sensor 15 Regenerator 17 Flow channel 20 Blower 25 First protrusion 25f First face 25s Second face 26 Second protrusion 26t Three sides 26f Fourth side 30 Controller 40 Display unit 50 Storage room 55 Housing 100a, 100b, 100c Cool storage device

Claims (9)

A housing having a storage room inside which is partitioned so as to be able to communicate with the cool storage room and the cool storage room;
A plurality of box bodies arranged in the first direction along the bottom surface of the cool storage chamber in the cool storage chamber, each storing a cool storage body;
It is arranged in the storage chamber, and causes a flow of air passing between the boxes along a second direction intersecting the first direction in a plane parallel to the bottom surface of the cold storage chamber to generate the flow of the air. A blower for circulating the air cooled by the regenerator,
The surface temperature of at least one of the boxes, the surface temperature of the regenerator stored in at least one of the boxes, or the internal temperature of the regenerator of at least one of the boxes is defined as A sensor for detecting at a plurality of positions in the direction of 2,
A first projecting portion which projects in the first direction between both ends of the box body in a third direction perpendicular to the bottom surface and defines a flow path of air flowing along the second direction, A first projecting portion including a first surface extending from a position away from both ends of the box body in a third direction toward a first end that is one of the both ends of the box body;
Wherein at least one of the plurality of positions, when viewed said box body from the first direction, Ri specific position near overlapping with the channel,
The first surface is a slope that narrows the flow path toward the downstream of the air flow,
Cold storage device. The regenerator according to claim 1, wherein the first surface is adjacent to the first end. The regenerator according to claim 1 or 2, wherein the first surface is adjacent to an upstream end that is an end of the box body on the upstream side of the air flow in the second direction. The first protrusion defines a cross-sectional area of the flow channel in a plane perpendicular to the second direction to be constant in the second direction downstream of the first surface in the flow of the air. further comprising a surface, the cold storage apparatus according to any one of claims 1-3. A second projecting portion projecting in the first direction between both ends of the box body in the third direction and defining the flow path together with the first projecting portion along the second direction, The regenerator according to claim 4 , further comprising a second protrusion that includes at least a third surface that faces the second surface. The third surface is the box on the upstream side of the air flow in the second direction between the second surface which is the other of the both ends of the box body in the third direction and the second surface. It extends away from the upstream end, which is the end of the body,
The second projecting portion further includes a fourth surface from the end of the third side of the upstream side of the air flow in the second direction extends toward the second end, according to claim 5 Cool storage device. The liquid state cold storage material included in the cold storage body has a density lower than the density of the solid state cold storage material included in the cold storage body,
The second end is located above the first end,
A distance between the second end and the specific position in the third direction is shorter than a distance between the first end and the specific position in the third direction,
The regenerator according to claim 6 . The liquid state cold storage material included in the cold storage body has a density higher than the density of the solid state cold storage material included in the cold storage body,
The first end is located above the second end,
A distance between the second end and the specific position in the third direction is shorter than a distance between the first end and the specific position in the third direction,
The regenerator according to claim 6 . Information indicating the temperature detected by the sensor is input, and at the plurality of positions, the surface temperature of the box body, the surface temperature of the regenerator stored in the box body, or the box body. A controller that generates state information indicating the state of the regenerator based on information indicating the internal temperature of the regenerator,
Further comprising a display unit for displaying the status information,
The regenerator according to any one of claims 1 to 8 .

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