JP7463526B2 - Refrigeration equipment and refrigeration system - Google Patents

Description

The present disclosure relates to refrigeration devices and refrigeration device systems.

In order to store samples such as biological tissues and frozen items, refrigeration devices such as ultra-low temperature freezers that cool the interior of a storage chamber to ultra-low temperatures, for example below -80°C, have been developed (see, for example, Patent Document 1).

JP 2016-183837 A

In refrigeration equipment, if the cooling function stops due to a power outage or malfunction, there is a demand to suppress a sudden rise in temperature inside the storage compartment.

The present disclosure aims to provide a refrigeration device that suppresses a sudden increase in temperature inside a storage chamber when the cooling function stops.

In order to achieve the above-mentioned objective, the refrigeration device of the present disclosure comprises a main body having an open storage chamber, an inner door that is detachably attached to the main body and capable of opening and closing the opening of the storage chamber, and holds a first cold storage material, and an outer door that is attached to the main body outside the inner door and capable of opening and closing the opening of the storage chamber.
When implementing the above-mentioned refrigeration device, the inner door may be preferably configured to cover the entire surface of the opening of the storage chamber.
Furthermore, when the above-mentioned configuration is adopted, the outer door may be preferably configured to cover the entire surface of the inner door from the outside.
Furthermore, when the above-mentioned configuration is adopted, the inner door may preferably have a hole on the surface on the side closer to the storage chamber.
In addition, when the above-mentioned configuration is adopted, the first cooling agent is preferably
The hole is provided on the inner door at a position that is outside the hole and overlaps with the hole in the front-rear direction.
It may be configured to come into contact with cold air in the storage compartment through the hole.

The refrigeration device system of the present disclosure is a refrigeration device system including a first refrigeration device having a first main body having an open first storage chamber, a first inner door that is detachably attached to the first main body and capable of opening and closing the opening of the first storage chamber, and holds a first cold storage material, and a first outer door that is attached to the first main body outside the first inner door and capable of opening and closing the opening of the first storage chamber, and a second refrigeration device having a second main body having an open second storage chamber, and a second outer door that is attached to the second main body and capable of opening and closing the opening of the second storage chamber, and the second refrigeration device is configured so that the first inner door can be attached inside the second outer door and capable of opening and closing the opening of the second storage chamber.
When implementing the above-mentioned refrigeration system, the inner door may be preferably configured to cover the entire surface of the opening of the storage chamber.
Furthermore, when the above-mentioned configuration is adopted, the outer door may be preferably configured to cover the entire surface of the inner door from the outside.
Furthermore, when the above-mentioned configuration is adopted, the inner door may preferably have a hole on the surface on the side closer to the storage chamber.
In addition, when the above-mentioned configuration is adopted, the first cooling agent is preferably
The hole is provided on the inner door at a position that is outside the hole and overlaps with the hole in the front-rear direction.
It may be configured to come into contact with cold air in the storage compartment through the hole.
Furthermore, when the above-mentioned configuration is adopted, it is preferable that when the first inner door is attached to the second refrigeration unit, the first inner door attached to the second refrigeration unit is configured to cover the entire surface of the opening of the second storage chamber.
Furthermore, when the above-mentioned configuration is adopted, it is preferable that, when the first inner door is attached to the second refrigeration unit, the second outer door is configured to cover the entire surface of the first inner door attached to the second refrigeration unit from the outside.

According to the refrigeration device disclosed herein, it is possible to suppress a sudden increase in temperature inside the storage chamber when the cooling function is stopped.

FIG. 1 is a perspective view of a refrigeration device according to an embodiment of the present disclosure. FIG. 2 is a diagram showing the refrigeration apparatus shown in FIG. 1 with the outer door open. FIG. 2 is a diagram showing the refrigeration device shown in FIG. 1 with the outer door and the inner door open. FIG. 2 is a cross-sectional view of the main body shown in FIG. FIG. 3 is an exploded perspective view of the inner door shown in FIG. FIG. 3 is a diagram showing the mounted portion and the mounting portion shown in FIG. 2 . A diagram showing a modified example of the inner door FIG. 4 is a perspective view of the shelf shown in FIG. FIG. 1 illustrates a refrigeration system according to an embodiment of the present disclosure. FIG. 13 shows a modified example of the mounting portion. FIG. 13 shows a modified example of the mounting portion.

<Refrigeration equipment>
Hereinafter, an embodiment of the refrigeration device of the present disclosure will be described with reference to the drawings. In the following, as shown by the arrows in Fig. 1, the upper and lower sides in Fig. 1 are respectively the upper and lower sides of the refrigeration device 1, the left and right sides are respectively the left and right sides of the refrigeration device 1, and the upper left and lower right sides are respectively the rear and front of the refrigeration device 1.

The freezer 1 is an ultra-low temperature freezer capable of storing samples such as biological tissue at ultra-low temperatures of -80°C or below. The freezer 1 may also be a drug refrigerator, a blood refrigerator, or an incubator. As shown in Figures 1 to 3, the freezer 1 comprises a main body section 10 and a mechanical section 20.

The main body 10 is formed in a box shape with an opening at the front. Thermal insulation material (not shown) is arranged inside the walls that make up the main body 10. The main body 10 includes a storage chamber 11, an outer door 12, a handle portion 13, and an inner door 30.

The storage chamber 11 is formed inside the main body 10 and is used to store the above-mentioned samples and the like. The storage chamber 11 is open at the front. Three shelves 40 are arranged inside the storage chamber 11. The three shelves 40 divide the interior of the storage chamber 11 into four storage spaces K in the vertical direction. It goes without saying that the number of shelves 40 is not limited to three.

As shown in FIG. 4, a plurality of storage racks L are arranged and stored in the storage space K. The storage rack L can store a plurality (up to 24) of storage boxes (not shown). The storage boxes are boxes for storing cylindrical test tubes (not shown) in which samples are placed. Each storage box is configured to store a plurality (up to 300) of test tubes in an upright position. In this embodiment, a maximum of six storage racks L can be stored in the storage space K. Also, instead of the storage racks L, the storage space K may store a microplate rack (not shown) capable of storing a plurality (up to 60) of microplates (not shown) in which samples are placed. Returning to FIG. 1 to FIG. 3, the explanation will be continued.

The outer door 12 is attached to the main body 10 so that the opening of the storage chamber 11 can be opened and closed outside the inner door 30. When the outer door 12 closes the storage chamber 11, the storage chamber 11 is sealed. A thermal insulating material (not shown) is arranged inside the outer door 12.

The handle portion 13 is gripped by the user when opening and closing the outer door 12.

The inner door 30 is removably attached to the main body 10 on the inside of the outer door 12, and is arranged so as to be able to open and close the storage chamber 11. When the inner door 30 is closed, the rear side of the inner door 30 faces the storage chamber 11. Details of the inner door 30 will be described later.

The mechanical unit 20 is disposed directly below the main body unit 10. The mechanical unit 20 houses a compressor (not shown), a condenser (not shown), and a pressure reducer (not shown) that constitute a refrigeration circuit (not shown) capable of cooling the storage chamber 11 to -80°C or below. An evaporator (not shown) that constitutes the refrigeration circuit is disposed within the side wall of the main body unit 10. The inside of the storage chamber 11 is cooled by the operation of the refrigeration circuit.

Next, the details of the inner door 30 will be described with reference to Figures 5 and 6. The inner door 30 is configured to removably hold a plurality of first cold storage materials T1.

The first cold storage material T1 comprises a rectangular parallelepiped container and a chemical agent contained in the container. The melting temperature of the chemical agent is preferably -50°C or lower. The melting temperature of the chemical agent is more preferably -70°C or lower, and even more preferably -80°C.

By setting the melting temperature of the drug to -50°C or lower, it is possible to reliably suppress a sudden rise in temperature in the storage chamber 11 that was cooled to -80°C when the cooling function of the refrigeration circuit is stopped. Also, by setting the melting temperature of the drug to -70°C or lower, it is possible to more reliably suppress a sudden rise in temperature in the storage chamber 11 that was cooled to -80°C when the cooling function of the refrigeration circuit is stopped. Also, by setting the melting temperature of the drug to -80°C, it is possible to more reliably suppress a sudden rise in temperature while maintaining the temperature in the storage chamber 11 that was cooled to -80°C at -80°C for a longer period of time when the cooling function of the refrigeration circuit is stopped. In other words, when the melting temperature of the drug is equal to or lower than the set temperature in the storage chamber 11, it is possible to particularly effectively suppress a sudden rise in temperature.

The inner door 30 is composed of two small doors 31. One small door 31 opens and closes the upper side of the storage room 11. The other small door 31 opens and closes the lower side of the storage room 11. The small door 31 is positioned so that its rear side faces the storage room 11 when closed. It goes without saying that the number of small doors 31 is not limited to two.

The small door 31 has a front panel 32, a frame portion 33, a back panel 34, an attachment portion 35, and a handle portion 36.

The front panel 32 is rectangular when viewed from the front and is positioned in front of the small door 31.

The frame portion 33 is sandwiched between the front plate 32 and the back plate 34. The frame portion 33 removably holds a plurality of first cold storage heat materials T1. The frame portion 33 has nine fitting portions 33a formed in through holes that are rectangular in front view and into which the first cold storage heat materials T1 are removably fitted. It goes without saying that the number of fitting portions 33a is not limited to nine. The frame portion 33 may also hold the first cold storage heat materials T1 in an unremovable manner.

The back plate 34 is formed in a rectangular shape when viewed from the front, and is disposed behind the small door 31. Nine holes 34a are formed in the back plate 34 to correspond to the fitting portions 33a. A portion of the first cold storage heat material T1 fitted in the frame portion 33 is exposed from the holes 34a. As a result, the first cold storage heat material T1 held in the frame portion 33 comes into direct contact with the cold air in the storage chamber 11. It goes without saying that the number of holes 34a is not limited to nine. The holes 34a are an example of a "hole portion." It is not necessary for the holes 34a to be formed in the back plate 34.

The front plate 32, frame 33, and back plate 34 are assembled in a disassembled manner, for example by screws. For example, by removing the front plate 32, the first cold storage heat material T1 can be removed from the frame 33. The inner door 30 is configured to hold the first cold storage heat material T1 outside the storage chamber 11 when attached to the main body 10. The inner door 30 may be configured to hold the first cold storage heat material T1 inside the storage chamber 11 when attached to the main body 10.

The mounting portion 35 is for removably mounting the small door 31 to the main body 10. The mounting portion 35 is removably attached to the mounting portion 15 (Figs. 2 and 6) arranged on the main body 10. As shown in Fig. 6, the mounting portion 15 has a cylindrical support portion 15a and an axis portion 15b extending upward from the upper end of the support portion 15a in the vertical direction.

The mounting portion 35 is formed in a cylindrical shape and is attached to the right side of the frame portion 33, and is formed with a bearing portion 35a into which the shaft portion 15b of the mounting portion 15 fits. The shaft portion 15b fits into the bearing portion 35a so as to be rotatable around the axis and movable along the direction of the axis. This makes it possible for the small door 31 to be opened and closed when the small door 31 is attached to the main body portion 10, and also makes it possible for the small door 31 to be removed from the main body portion 10 by lifting the small door 31.

The handle portion 36 is located on the front panel 32 and is the part that is grasped by the user when the small door 31 is opened or closed.

In the above-described refrigeration device 1, if the operation of the refrigeration circuit stops due to a power outage, for example, the inside of the storage chamber 11 is not cooled, and the temperature inside the storage chamber 11 rises. However, the refrigeration device 1 according to this embodiment has a first cold storage material T1 held in the inner door 30. Therefore, a sudden rise in temperature inside the storage chamber 11 is suppressed.

According to this embodiment, the refrigeration device 1 comprises a main body 10 having an open storage chamber 11, an inner door 30 that is detachably attached to the main body 10 and capable of opening and closing the opening of the storage chamber 11 and that holds a first cold storage material T1, and an outer door 12 that is attached to the main body 10 outside the inner door 30 and capable of opening and closing the opening of the storage chamber 11.

According to this, the first cold storage heat material T1 can suppress a sudden rise in temperature in the storage chamber 11 when the cooling function is stopped. Furthermore, when the refrigeration device 1 is performing cooling operation by repeatedly turning the compressor on and off, the first cold storage heat material T1 can suppress a sudden rise in temperature in the storage chamber 11 even when the compressor is off. In addition, since the outer door 12 is always exposed to the outside air, when the compressor is off, the outer door 12 and the part of the storage chamber 11 on the outer door 12 side are easily affected by the outside air temperature. However, the inner door 30 in which the multiple cold storage heat materials T1 are arranged is arranged between the outer door 12 and the storage chamber 11. Therefore, the multiple cold storage heat materials T1 can suppress the influence of the outside air temperature on the storage chamber 11.

The inner door 30 also holds the first cold storage material T1 in a removable manner.

This allows the first cold storage heat storage material T1 to be removed from the inner door 30 and stored in the storage chamber 11. In addition, the first cold storage heat storage material T1 can be easily replaced.

In addition, the first cold storage heat material T1 is held in direct contact with the cold air in the storage chamber 11 through a hole 34a formed in the inner door 30.

This allows the first cold storage heat material T1 to be cooled efficiently. Furthermore, the contact area between the back plate 34 and the first cold storage heat material T1 is reduced by the hole 34a, so the first cold storage heat material T1 can be removed more easily than in the absence of the hole 34a.

The inner door 30 is also composed of a number of small doors 31. Each of the small doors 31 is removably attached to the main body 10.

According to this, the first cold storage material T1 can be replaced by replacing the small door 31.

In addition, the inner door 30 holds the first cold storage material T1 outside the storage chamber 11.

As a result, the inner door 30 can hold the first cold storage material T1 without reducing the effective volume of the storage chamber 11, that is, without reducing the number of samples, etc. that can be stored.

The refrigeration device 1 also has a refrigeration circuit that cools the storage chamber 11 to below -80°C.

As a result, the first cold storage material T1 can suppress a sudden rise in temperature inside the storage chamber 11, which has been cooled to below -80°C, when the cooling function is stopped.

In addition, the small door 31 described above is attached to the main body 10 so that it can be removed by lifting it up, but instead, the small door 31 may be attached to the main body 10 using a known attachment/detachment mechanism so that it can be removed by the user pulling the small door 31 in a direction perpendicular to the up-down direction.

The refrigeration device 1 may also be provided with a small door 131 as shown in Figure 7, instead of the small door 31 described above. The small door 131 is constructed from a single plate member. A plurality of holding portions 137 for holding the first cold storage heat material T1 are arranged on the rear side of the small door 131. The holding portions 137 are formed in a box shape that is open at the top and has holes 138 in the side walls. The first cold storage heat material T1 can be taken in and taken out through the openings of the holding portions 137.

The refrigeration device 1 may also include a shelf 140 shown in FIG. 8 instead of the shelf 40 described above. The shelf 140 is configured to hold the second cold storage heat material T2 inside. The shelf 140 is formed in a hollow rectangular parallelepiped shape that opens at the front, and the inner space is divided into three holding spaces 142 by side walls 141. It goes without saying that the number of holding spaces 142 is not limited to three. Each of the holding spaces 142 removably holds the second cold storage heat material T2.

The second cold storage heat storage material T2 is stored in a container that is large enough to fit into the holding space 142, and contains the same chemicals as the first cold storage heat storage material. The container of the second cold storage heat storage material T2 has a handle portion T2a that can be held by the user when stored in the holding space 142. The user holds the handle portion T2a to attach and detach the second cold storage heat storage material T2 to and from the holding space 142. The shelf 140 may hold the second cold storage heat storage material T2 in an undetachable manner. The container of the second cold storage heat storage material T2 may have the same shape as the container of the first cold storage heat storage material T1. By making them have the same shape, it is possible to provide compatibility between the first cold storage heat storage material T1 and the second cold storage heat storage material T2.

The shelf 140 further has a hole 143. The hole 143 is formed in the upper wall of the shelf 140 at a position where the second cold storage heat material T2 held in the holding space 142 is exposed. This allows the second cold storage heat material T2 held in the holding space 142 to directly contact the cold air in the storage room 11. This allows the second cold storage heat material T2 to be cooled efficiently. The hole 143 may also be formed in a wall other than the upper wall of the shelf 40 (e.g., the lower wall). Furthermore, the shelf 140 may be configured to be detachable from the main body 10.

In this embodiment, the refrigeration device 1 further includes a shelf 140 that divides the storage chamber 11 and has a space therein for holding a second cold storage material T2.

According to this, the second cold storage heat material T2 can suppress a sudden temperature rise in the storage chamber 11 when the cooling function is stopped. Even when samples and the like are stored without gaps in the storage space K, the second cold storage heat material T2 can be stored in the storage chamber 11. In addition, in this embodiment, the second cold storage heat material T2 is arranged at a position closer to the storage rack L than the first cold storage heat material T1. Also, the second cold storage heat material T2 is arranged at least one above or below the storage rack L. Therefore, the second cold storage heat material T2 can reliably suppress a sudden temperature rise in the storage rack L. When the refrigeration device 1 is performing a cooling operation by repeatedly turning the compressor on and off, the second cold storage heat material T2 can similarly suppress a sudden temperature rise in the storage rack L when the compressor is off.

<Refrigeration system>
Next, an embodiment of the refrigeration device system 2 of the present disclosure will be described with reference to FIG. 9. The refrigeration device system 2 includes two refrigeration devices 1 described above. It goes without saying that the number of refrigeration devices 1 included in the refrigeration device system is not limited to two. Hereinafter, the refrigeration device system 2 will be described with one refrigeration device 1 as the first refrigeration device 1a, and the reference numerals of the components of the first refrigeration device 1a will be the reference numerals of the components of the refrigeration device 1 described above with the suffix "a". In addition, the other refrigeration device 1 will be described as the second refrigeration device 1b, and the reference numerals of the components of the second refrigeration device 1b will be the reference numerals of the components of the refrigeration device 1 described above with the suffix "b".

Since the first refrigeration device 1a and the second refrigeration device 1b have the same configuration, the first small door 31a of the first refrigeration device 1a and the second small door 31b of the second refrigeration device 1b are interchangeable. In addition, the first cold storage material T1 held in the first small door 31a and the first cold storage material T1 held in the second small door 31b are interchangeable.

In the refrigeration device system 2, when the operation of the refrigeration circuit of the second refrigeration device 1b is stopped, the temperature rise in the second storage chamber 11b in the second refrigeration device 1b is suppressed by the first cold storage material T1 held in the second small door 31b.

In this case, if the operation of the refrigeration circuit of the second refrigeration device 1b continues, the temperature in the storage chamber 11 rises and the temperature of the first cold storage material T1 held in the second small door 31b rises. On the other hand, if the operation of the refrigeration circuit of the first refrigeration device 1a continues, the first cold storage material T1 held in the first small door 31a is cooled. Therefore, by holding the first cold storage material T1 held in the first small door 31a in the second small door 31b instead of the first cold storage material T1 held in the second small door 31b, the temperature rise in the second storage chamber 11b can be suppressed by the first cold storage material T1 held in the first small door 31a. In this case, instead of the second small door 31b of the second refrigeration device 1b, the first small door 31a of the first refrigeration device 1a may be attached to the second refrigeration device 1b.

In addition, when the first refrigeration device 1a has a first shelf 140a and the second refrigeration device 1b has a second shelf 140b, the second cold storage material T2 held on the first shelf 140a and the second cold storage material T2 held on the second shelf 140b are interchangeable. Therefore, by holding the second cold storage material T2 held on the first shelf 140a on the second shelf 140b instead of the second cold storage material T2 held on the second shelf 140b, the temperature rise in the second storage chamber 11b can be suppressed by the second cold storage material T2 held on the first shelf 140a. In this case, the first shelf 140a of the first refrigeration device 1a may be attached to the second refrigeration device 1b instead of the second shelf 140b of the second refrigeration device 1b.

According to this embodiment, the refrigeration system 2 includes a first refrigeration device 1a having a first main body 10a having an opened first storage chamber 11a, a first inner door 30a that is detachably attached to the first main body 10a and that can open and close the opening of the first storage chamber 11a and holds a first cold storage material T1, and a first outer door 12a that is attached to the first main body 10a so as to open and close the opening of the first storage chamber 11a outside the first inner door 30a, and a second refrigeration device 1b having a second main body 10b having an opened second storage chamber 11b and a second outer door 12b that is attached to the second main body 10b so as to open and close the opening of the second storage chamber 11b. The second refrigeration device 1b is configured so that the first inner door 30a can be attached inside the second outer door 12b so as to open and close the opening of the second storage chamber 11b.

According to this, when the operation of the refrigeration circuit of the second refrigeration device 1b is stopped, the refrigeration device system 2 can suppress the temperature rise in the second storage chamber 11b of the second refrigeration device 1b by the first cold storage material T1 stored in the first refrigeration device 1a in addition to the first cold storage material T1 stored in the second refrigeration device 1b. In other words, the temperature of the second storage chamber 11b before the operation of the refrigeration circuit of the second refrigeration device 1b is stopped can be maintained for a longer period of time after the refrigeration circuit is stopped.

Furthermore, in the above-mentioned refrigeration device system 2, the second refrigeration device 1b among the multiple refrigeration devices 1 may not be provided with the second inner door 30b.

<Modification>
The present disclosure is not limited to the embodiments described above. As long as they do not deviate from the gist of the present disclosure, various modifications of the present embodiments and combinations of components in different embodiments are also included within the scope of the present disclosure.

For example, the mounting portion 35 may have a structure that is normally not removable from the mounting portion 15 and can only be removed by performing a predetermined operation. The predetermined operation is, for example, the operation of the handle portion 36.

A specific example will be described with reference to Figures 10 and 11. The mounting portion 135 is a modified version of the mounting portion 35. The mounting portion 135 is attached to the mounting portion 115 disposed above and below the mounting portion 135. The mounting portion 135 includes a guide member 135a, a pair of shaft members 135b, a gear 135c, and a spiral spring portion 135d.

The guide member 135a is formed in a cylindrical shape extending in the vertical direction and holds the pair of shaft members 135b inside so that they can move along the axial direction. Through holes 135a1 are formed at both ends of the guide member 135a.

The pair of shaft members 135b includes a shaft portion 135b1 and a rack portion 135b2. The shaft portion 135b1 fits into the through hole 135a1 so as to be movable in the vertical direction. The shaft portion 135b1 also fits into a fitting hole 115c formed in the mounting portion 115 so as to be rotatable about an axis and movable in the vertical direction.

The rack portion 135b2 is formed integrally with the shaft portion 135b1 so that the teeth extending in the vertical direction face radially inward of the guide member 135a.

The gear 135c meshes with the rack portion 135b2. When the gear 135c rotates, the pair of shaft members 135b moves in the vertical direction.

The spiral spring portion 135d rotates the gear 135c. The spiral spring portion 135d is a contact type spiral spring formed by winding a thin plate 135d1. A first end of the thin plate 135d1 is connected to the gear 135c. A second end of the thin plate 135d1 is connected to the handle portion 36 of the small door 31.

When the small door 31 is attached to the main body 10 (FIG. 10), the spiral spring 135d has the thin plate 135d1 extended. At this time, the pair of shaft members 135b have the shaft portions 135b1 protruding from the through holes 135a1 to the outside and fitted into the fitting holes 115c.

When the small door 31 is removed, for example, when the handle portion 36 is rotated, the spiral spring portion 135d winds up the thin plate 135d1. This rotates the gear 135c, and the pair of shaft members 135b move in the vertical direction so that the shaft portion 135b1 is stored in the guide member 135a (FIG. 11). This causes the shaft portion 135b1 to come off the mounting portion 15. Therefore, the user can remove the small door 31 from the main body portion 10 by pulling the small door 31 in a direction perpendicular to the vertical direction.

On the other hand, when the user aligns the mounting portion 135 with the mounting portion 15 while the small door 31 is removed and performs a predetermined operation, such as turning the handle portion 36, the spiral spring portion 135d advances the thin plate 135d1. This rotates the gear 135c, and the pair of shaft members 135b move in the vertical direction so that the shaft portion 135b1 protrudes outward from the guide member 135a. As a result, the shaft portion 135b1 fits into the fitting hole 115c, and the small door 31 is attached to the main body portion 10.

According to this, the small door 131 is removed from the main body by a specified operation by the user. In other words, the small door 131 does not come off from the main body 10 through normal opening and closing operations. This prevents the small door 131 from coming off from the main body 10 against the user's intention, thereby preventing the small door 131 from falling and ensuring the safety of the user.

The disclosures of the specification, claims, drawings and abstract contained in the Japanese application No. 2020-138875, filed on August 19, 2020, are hereby incorporated by reference in their entirety into this application.

The present disclosure is widely applicable to refrigeration devices such as ultra-low temperature freezers, pharmaceutical refrigerators, blood refrigerators, and incubators, as well as refrigeration device systems.

REFRIGERATION SYSTEM 1 a 1st refrigeration device 1 b 2nd refrigeration device 2 Refrigeration system 10 Main body 11 Storage chamber 12 Outer door 15 Mounting section 30 Inner door 31 Small door 34 a Hole 140 Shelf 142 Holding space T1 1st cold storage material T2 2nd cold storage material

Claims (7)

A main body having an open storage chamber;
an inner door that is detachably attached to the main body and that can open and close the opening of the storage chamber, and that holds a first cold storage material;
an outer door attached to the main body so as to be capable of opening and closing the opening of the storage chamber on the outer side of the inner door;
The inner door has a hole on a surface close to the storage chamber and covers the entire opening of the storage chamber,
The outer door covers the entire surface of the inner door from the outside,
The first cooling agent is
The inner door is provided at a position that is outward of the hole and overlaps with the hole in the front-rear direction,
The cold air in the storage chamber comes into contact with the cold air through the hole.
Refrigeration equipment. The inner door detachably holds the first cold storage material.
2. The refrigeration system of claim 1. The inner door is composed of a plurality of small doors,
Each of the plurality of small doors is detachably attached to the main body.
2. The refrigeration system of claim 1. The inner door holds the first cold storage material outside the storage chamber.
2. The refrigeration system of claim 1. The storage chamber is divided, and a shelf having a space for holding a second cold storage material therein is further provided.
2. The refrigeration system of claim 1. Further comprising a refrigeration circuit for cooling the storage chamber to -80°C or lower.
2. The refrigeration system of claim 1. a first body portion having an open first storage chamber;
a first inner door that is detachably attached to the first main body and that can open and close an opening of the first storage chamber, and that holds a first cold storage material;
a first outer door attached to the first main body so as to be capable of opening and closing an opening of the first storage chamber on the outer side of the first inner door;
the first inner door has a hole on a surface close to the storage chamber and covers an entire opening of the first storage chamber;
The first outer door covers the entire surface of the first inner door from the outside,
The first cooling agent is
The inner door is provided at a position that is outward of the hole and overlaps with the hole in the front-rear direction,
The cold air in the storage chamber comes into contact with the cold air through the hole.
A first refrigeration device;
a second body portion having an open second storage chamber;
a second outer door attached to the second main body so as to be capable of opening and closing an opening of the second storage chamber;
A refrigeration system comprising:
The second refrigeration device is configured so that the first inner door can be attached to the inside of the second outer door so that an opening of the second storage chamber can be opened and closed,
When the first inner door is attached to the second refrigeration unit, the first inner door attached to the second refrigeration unit covers an entire surface of an opening of the second storage chamber,
When the first inner door is attached to the second refrigeration unit, the second outer door covers the entire surface of the first inner door attached to the second refrigeration unit from the outside.
Refrigeration system.

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