JP6926698B2 - Cool box - Google Patents

Description

The present invention relates to a cold storage capable of keeping a cold object to be kept cold for a long period of time even in an environment without a power source.

Conventionally, by covering the main body of a styrofoam cold storage container in which the cold storage object is stored together with dry ice with a styrofoam lid, the cold storage object can be kept at a predetermined low temperature even in an environment without a power source. Cold storage containers that can keep cold are known.

However, if the dry ice and the cold storage object are stored in the same storage space in the cold storage container body, a part of the cold storage target comes into direct contact with the dry ice, so that the dry ice among the cold storage objects becomes dry ice. There is a possibility that relatively large cooling unevenness may occur between the contacted portion and the non-contacted portion.

Therefore, in order to prevent a part of the object to be cooled from coming into direct contact with the dry ice, a cold air supply chamber for storing the dry ice is provided as a lid to cover the box-shaped cold storage container body with the upper side open. There is known a cold storage container configured to send the cold air in the cold air supply chamber to the cold storage container main body side through an opening formed in the bottom of the lid by applying what it has (Patent Document 1). In addition, the pre-cooling space and the cold storage space are arranged side by side inside the main body of the cold storage container, and the dry ice and the cold storage agent are stored and arranged in the pre-cooling space, and the cold air formed at the boundary between the pre-cooling space and the cold storage space. A cool box configured to automatically control the degree of opening of the communication port based on the temperature in the cold insulation space is also known (Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-043020 Japanese Unexamined Patent Publication No. 2002-357383

However, as described above, if the cold air is directly sent only from above to the cold storage object stored in the cold storage space, the cold storage object housed in the cold storage space is rapidly cooled, and the cold air causes the cold air to be cooled rapidly. Not suitable for cold storage of vegetables and fruits that are susceptible to adverse effects. That is, it has been found that the above-mentioned configuration has a problem that the so-called heat shock, in which the quality of the object to be cooled is changed under the influence of the temperature change, occurs relatively frequently.

In addition, if the cold air is sent directly from above the cold storage space, the inside of the cold storage space will be cooled rapidly, so the difference between the temperature inside the cold storage space and the outside air temperature will be large, and the cold storage space will be isolated from the external space. Condensation is likely to occur on the wall. Therefore, when the object to be kept cold is packed with a packing material such as a cardboard box, the packing material in contact with the wall may get wet due to dew condensation, which may adversely affect the object to be kept cold. Furthermore, as the amount of dry ice used increases, the concentration of carbon dioxide released into the cold storage chamber also increases, and as a result, the cold storage object (for example, vegetables, fruits, etc.) may be damaged from the inside.

The present invention has been made by paying attention to such a point, and a main object thereof is to effectively utilize dry ice to cool a cold object at a predetermined low temperature while avoiding abrupt cooling of the cold object. The purpose is to provide a cold storage that can be stored in an environment for a long period of time.

That is, the cold storage according to the present invention has a cold storage space capable of accommodating a cold storage object, a pre-cooling space formed above the cold storage space and containing dry ice and an ice pack, and a cold storage space and a pre-cooling space. A heat-insulating middle shelf that divides into two parts, a cold storage main body that has a cold storage space and a pre-cooling space in the internal space and opens in a predetermined direction, a door that can open and close the opening of the cold storage main body, and a pre-cooling space from the external space. It is characterized by having a door portion dedicated to the pre-cooling space to partition, and intermittently providing a plurality of cold air guiding portions along the inner circumference on the inward facing surface of the upright wall of the cold storage body facing the cold storage space. The cold air guiding portion in the present invention communicates with the pre-cooling space at the upper end through a hole formed in the middle shelf and reaches the bottom wall or the vicinity of the bottom wall of the cold storage body at the lower end.

Examples of the object to be kept cold in the present invention include unprocessed foods such as fresh foods including vegetables, fruits, meat and the like, fresh flowers and the like. Further, the "standing wall of the cold storage main body" in the present invention means a wall that is arranged in an upright posture among the walls that partition the internal space of the cold storage main body from the external space.

In such a cold storage, the dry ice itself contained in the pre-cooling space formed above the cold storage space, the cold air generated by the carbon dioxide gas produced by sublimation of the dry ice, and the cold air generated by the ice pack cooled by the cold air are generated. , It is not directly discharged to the cold storage space, but flows through the holes formed in the inner shelf to a plurality of cold air induction parts provided on the inward facing surface of the standing wall of the cold storage body facing the cold storage space, and the cooled cold air is guided. Cool the cold storage space through the section. As a result, the amount and momentum of the cold air flowing into the cold storage space per unit time is reduced compared to the configuration in which the cold air is directly discharged from the pre-cooling space to the cold storage space, and when the dry ice and the ice pack are stored in the pre-cooling space. It takes a long time for the temperature of the cold storage space to reach a predetermined low temperature, and it is possible to prevent / suppress the sudden cooling of the cold storage object stored in the cold storage space. It is possible to avoid deterioration of the quality of processed foods.

Further, in the present invention, since a plurality of cold air guiding portions are intermittently provided along the inner circumference on the inward facing surface of the upright wall of the cold box main body facing the cold insulation space, cold air is provided from the entire inward surface of the upright wall. Compared to the configuration that cools the cold insulation space, it is possible to save energy by reducing the amount of dry ice consumed and the amount of carbon dioxide released, and at the same time, it is an ice pack that exerts an effective cold insulation function with the cold air of dry ice. The cooling duration per one can be increased. Furthermore, by reducing the amount of dry ice used, it is possible to avoid the situation where the object to be cooled (for example, fruit) is damaged due to the high concentration of carbon dioxide gas entering the cold storage space.

Since the cold storage according to the present invention is not configured to rapidly cool the inside of the cold storage space, a problem that occurs if the inside of the cold storage space is rapidly cooled, that is, the difference between the temperature inside the cold storage space and the outside air temperature Condensation is likely to occur in the part of the main body of the cold storage that separates the cold storage space from the external space. It is possible to prevent / suppress the occurrence of a problem that the material gets wet and adversely affects the object to be kept cold. In particular, in the present invention, since a plurality of cold air guiding portions are provided intermittently, the packing material has a large area and the inward surface of the cold storage space (of the wall of the cold storage body that divides the cold storage space). Since it is possible to avoid contact with the cold insulation space) and the cold air guiding portion, it is possible to effectively prevent the packing material from getting wet due to dew condensation.

Further, in the cold storage according to the present invention, the pre-cooling space for storing the dry ice and the cold insulation agent can be separated from the cold storage space and separated from the external space by the door portion dedicated to the pre-cooling space. Even if the door of the cold storage space is opened when taking in and out, it is possible to avoid the problem that the temperature of the pre-cooling space rises temporarily due to the influence of the outside air temperature, and the predetermined pre-cooling temperature should be maintained. Can be done. Then, even when the object to be cooled is taken in and out of the cold storage space, the cold air in the precooling space cools the cold storage space through the cold air induction unit, thereby preventing the temperature of the cold storage space from rising immediately due to the influence of the outside air temperature. It is possible to maintain an appropriate cooling temperature.

Cool air guiding portion in the present invention, Ru Oh which was composed of corrugated plate (for example, a metal plate or that a plate of plastic plate or the like is curved in a wave shape). A plurality of cold air guiding portions may be provided intermittently along the inner circumference on the inward surface of the upright wall, and a plurality of cold air guiding portions may be arranged at equal pitches or unequal pitches. Any of the above may be used, and a group of cold air guiding parts in which a plurality of cold air guiding parts are arranged in succession may be arranged at equal pitch or unequal pitch. The cold air induction part group can be formed relatively easily by using a pipe material or a corrugated sheet.

As described above, according to the present invention, the cold air guiding portion whose upper end communicates with the precooling space through the hole formed in the middle shelf and whose lower end reaches the bottom wall of the cold storage body or the vicinity of the bottom wall is formed. Since a plurality of inward facing surfaces of the upright wall of the cold storage space facing the cold storage space are provided intermittently along the inner circumference thereof, the cold storage object stored in the cold storage space is prevented from being cooled suddenly. It is possible to provide a cold storage that can effectively utilize dry ice to store a cold storage object in a predetermined low temperature environment for a long period of time.

The whole view of the cold storage which concerns on one Embodiment of this invention. The front view of the cool box which concerns on the same embodiment. A side view of a cold storage according to the same embodiment. The plan view of the cool box which concerns on the same embodiment. FIG. 2 is a cross-sectional view taken along the line aa of FIG. FIG. 3 is a cross-sectional view taken along the line bb of FIG. FIG. 3 is a cross-sectional view taken along the line cc of FIG. The figure which shows one modification of the cool box which concerns on the same embodiment corresponding to FIG. The figure which shows the other modification of the cool box which concerns on the same embodiment corresponding to FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The cold storage X according to the present embodiment can keep the cold object to be kept cold without requiring a power source. Examples of the object to be kept cold include vegetables, fruits, fresh flowers, etc., which do not need to be maintained in a frozen state.

As shown in FIG. 1, the cold storage X according to the present embodiment includes a cold storage main body 1 having an internal space opened in a predetermined direction, and a door portion 2 capable of opening and closing the opening of the cold storage main body 1. .. As shown in FIGS. 2 to 7, the cold storage main body 1 has a box shape that opens forward, and includes left and right side walls 11 and 12, a rear wall 13, a bottom wall 14, and a ceiling wall 15. Each of these walls (left and right side walls 11, 12, rear wall 13, bottom wall 14, and ceiling wall 15) is each composed of a metal plate (for example, a stainless steel plate) filled with a heat insulating material such as urethane foam. There is. A joint material made of, for example, ABS resin is provided at the joint portion between adjacent walls among the walls 11, 12, 13, 14, and 15, to maintain an appropriate joint state between the walls. In each of the drawings after FIG. 2, the joint portion between the walls is simplified. Further, in FIGS. 5 to 7, parallel diagonal lines (hatching) attached to the cut surface are omitted.

The internal space of the cold storage main body 1 is divided into a cold storage space S1 and a pre-cooling space S2 along the height direction (see FIG. 5). Specifically, an inner shelf 3 is provided inside the cold storage main body 1, and the inner space of the cold storage main body 1 is divided into a cold storage space S1 and a pre-cooling space S2 in the height direction by the middle shelf 3.

The middle shelf 3 has heat insulating properties, and is, for example, a laminated one in which a plate-shaped styrofoam material is sandwiched between thin plate-shaped stainless steel materials from above and below. In the cold storage X of the present embodiment, the space below the middle shelf 3 in the internal space of the cold storage main body 1 is set as the cold storage space S1, and the space above the middle shelf 3 is set as the pre-cooling space S2. ing.

When dry ice and an ice pack are housed in the pre-cooling space S2, the temperature inside the pre-cooling space S2 is the periphery cooled by the dry ice (including carbon dioxide gas in which the dry ice is sublimated, the same applies hereinafter) and the ice pack. It is maintained at a predetermined low temperature by the air (cold air) and the cold carbon dioxide gas. In the present embodiment, a dedicated tray 4 capable of accommodating dry ice and a cooling agent is arranged in the precooling space S2 (see FIGS. 5 and 6). Therefore, the user can set or replenish the dry ice and the ice pack in the tray 4 taken out from the pre-cooling space S2. The inside of the tray 4 can be divided into an area for accommodating dry ice and an area for accommodating a coolant (not shown). As an example of the layout inside the tray 4, in the depth direction D, a layout in which the first coolant accommodating area, the dry ice accommodating area, and the second coolant accommodating area are arranged in this order from the rear (rear wall 13 side) to the front is arranged. Can be mentioned. A layout other than this may be adopted. In the present embodiment, the tray 4 is supported in a state of being floated from the middle shelf 3 by an appropriate support portion (not shown), and the bottom surface of the tray 4 is set so as not to come into direct contact with the middle shelf 3. A configuration may be adopted in which the 4 is placed on the middle shelf 3. The tray 4 shown in FIG. 5 includes a tray body 41 and a lid 42. Then, with the lid 42 covered from above the tray body 41, the air (cold air) inside the tray 4 cooled by dry ice and an ice pack and the cooled carbon dioxide are allowed through a slight gap between the lid 42 and the tray body 41. The carbon gas is configured to leak to the outside of the tray 4, that is, to the precooling space S2. However, regarding the configuration in which the air (cold air) in the tray 4 is discharged to the outside (pre-cooling space S2), a ventilation hole (not shown) may be provided as necessary.

The cold storage X of the present embodiment includes a door portion 5 dedicated to the pre-cooling space that partitions the pre-cooling space S2 from the external space, in addition to the door portion 2 that can open and close the opening of the cold storage main body 1 (FIGS. 5 and 6). reference). That is, the pre-cooling space S2 is a space partitioned by a door portion 5 dedicated to the pre-cooling space, a pair of left and right side walls 11 and 12 of the cold storage main body 1, a rear wall 13, a ceiling wall 15, and a middle shelf 3. The door portion 5 dedicated to the precooling space is arranged inside (internal side) of the door portion 2. Therefore, the pre-cooling space S2 has a double door structure of the door portion 2 and the door portion 5 dedicated to the pre-cooling space, and can maintain an appropriate cooling temperature state. The door portion 5 dedicated to the pre-cooling space in the present embodiment is positioned at the closed position by taking the upright posture shown in FIG. 5, and is forward (indicated by a relatively thick line in the figure) with the hinge 51 provided at the lower end as a fulcrum. It is positioned in the open position by tilting it in the direction of the arrow) and putting it in a prone position.

The cold insulation space S1 becomes a closed space when the door portion 2 is in the closed position, and becomes an open space when the door portion 2 is in the open position. That is, the cold storage space S1 is a space partitioned by the door portion 2, the pair of left and right side walls 11 and 12 of the cold storage main body 1, the rear wall 13, the bottom wall 14, and the middle shelf 3.

As shown in FIG. 2, the door portion 2 is rotatably supported by a hinge H provided between one of the pair of left and right side walls 11 and 12 of the cold storage body 1 and one side wall 11, and is rotatably supported by the other side wall 12. It can be fixed in the closed position by the lock portion L provided between the doors. Note that the lock portion L is omitted in FIGS. 4 and 6. The door portion 2 has a structure in which the outer door 21 and the inner door 22 are overlapped in the thickness direction, and the inner door 22 is set to fit into the opening of the cold storage main body 1 at the closed position. In the present embodiment, a frame-shaped door stop portion 16 is provided, which is slightly behind the opening edge of the cold storage main body 1 and is in contact with the inner door 22 of the door portion 2 at the closed position (FIGS. 5 to 7). reference). Further, as shown in FIG. 5 and the like, the door portion 2 is provided with a frame-shaped elastic material P (packing) that is in close contact with the opening edge of the cold storage main body 1 at the closed position.

As shown in FIGS. 5 and 7, the cold storage X according to the present embodiment is provided with a cold air guiding portion 6 on the pair of left and right side walls 11 and 12 and the rear wall 13 of the cold storage main body 1. In the illustrated example, the cold air guiding portion 6 is made of, for example, a stainless steel square pipe material, and is a pair of left and right side walls 11 and 12 and a rear wall 13 which are standing walls of the cold storage main body 1, and a cold storage space in each of these walls. It is provided on the inward facing surface facing S1. A plurality of cold air guiding portions 6 are intermittently provided along the depth direction D of the cold storage main body 1 on the inward facing surfaces of the pair of left and right side walls 11 and 12 of the cold storage main body 1. Further, a plurality of cold air guiding portions 6 are intermittently provided along the width direction W of the cold storage main body 1 on the inward facing surface of the rear wall 13 of the cold storage main body 1. That is, the cold storage X of the present embodiment has a plurality of cold air guiding portions 6 intermittently along the inner circumference of the cold storage main body 1. Specifically, a plurality of cold air guiding portions 6 are arranged at substantially equal pitches along the inner circumference of the cold storage space S1 in the cold storage main body 1.

The upper end of each cold air guiding portion 6 communicates with the precooling space S2 through a hole 3a (see FIG. 6) formed in the middle shelf 3. Holes 3a communicating with the inside of the cold air guiding portion 6 are formed at a predetermined pitch on the outer peripheral edge of the middle shelf 3. Each hole 3a penetrates the middle shelf 3 in the height direction (thickness direction). In addition, in a state where the upper end of the cold air guiding portion 6 is inserted (fitted) into the hole 3a, the upper end of the cold air guiding portion 6 may be configured to communicate with the precooling space S2 through the hole 3a. Then, in a state where the upper end of the cold air guiding portion 6 is in contact with the downward surface (bottom surface) of the middle shelf 3, the upper end of the cold air guiding portion 6 is configured to communicate with the precooling space S2 through the hole 3a.

Further, the lower end of each cold air guiding portion 6 reaches the bottom wall 14 or the vicinity of the bottom wall 14 of the cold storage main body 1. In the present embodiment, a mounting table 7 such as a drainboard or a pallet is arranged on the bottom wall 14 so that the mounting table 7 and the cold air guiding portion 6 do not interfere with each other. In the cold storage space S2, the cold storage object can be stored in a state of being placed on the mounting table 7. A mounting table 7 (a mounting table with a hygroscopic function) provided with a hygroscopic agent can be applied to the present embodiment.

Next, a method and operation of the cold storage X according to the present embodiment having such a configuration will be described.

First, the door portion 2 in the closed position and the door portion 5 dedicated to the pre-cooling space are changed to the open positions in this order, and the tray 4 in which the dry ice and the ice pack are set is stored in the pre-cooling space S2, and then the door portion dedicated to the pre-cooling space is stored. Set 5 to the closed position. As a result, the cold air from the dry ice and the ice pack is gradually released from the inside of the tray 4 into the precooling space S2, and the temperature of the precooling space S2 can be lowered to a predetermined temperature.

The cold air in the pre-cooling space S2 flows down to each cold air guiding portion 6 through the hole 3a of the middle shelf 3, so that the internal temperature of the cold storage space S1 also begins to decrease. Since the middle shelf 3 has a heat insulating property, the cold air does not descend all at once from the entire downward surface of the middle shelf 3, but the cold air gradually descends through the cold air guiding portion 6 along the inward surface. It will be. Then, for example, a cold storage object such as a fruit packed in a packing material such as a cardboard box is stored in the cold storage space S1 (specifically, placed on a mounting table 7), and the door portion 2 is moved from the open position to the closed position. Then, the door portion 2 is fixed to the closed position by the lock portion L. The user can move (rotate) the door portion 2 between the open position and the closed position by grasping the handle 23 (see FIG. 1 and the like) provided on the door portion 2.

Through the above procedure, the cold insulation object is stored in the cold insulation space S1 which is in a predetermined low temperature state due to the cold air transmitted from the pre-cooling space S2 through the holes 3a of the middle shelf 3 and each cold air induction unit 6, thereby keeping the cold insulation. The object is gradually cooled to prevent or suppress the situation of receiving heat shock, and the object to be kept refrigerated can be stored refrigerated for a long period of time (about 10 days in the practical test by the present inventor). The carbon dioxide gas in the cold storage body 1 gradually permeates the elastic material P and the above-mentioned joint material and is released into the external space.

In particular, in the cold storage X according to the present embodiment, each cold air guiding portion 6 is intermittently placed on the pair of left and right side walls 11, 12 and the rear wall 13 along the depth direction D or the width direction W (along the inner circumference). Since it is provided, it is possible to prevent / suppress the situation where the object to be cooled stored in the cold storage space S1 is rapidly cooled, and the packing material such as a cardboard box is provided in the cold storage space 1 due to a sudden temperature change in the cold storage space. It is also possible to prevent / suppress the situation of getting wet due to the dew condensation that occurs on each of the walls 11, 12, and 13.

Further, in the cold storage X according to the present embodiment, since the cold insulation agent is stored in the pre-cooling space S2 in addition to the dry ice, the cold insulation function of the cold insulation agent can be prolonged by the cold air of the dry ice.

According to such a configuration, the cold air from the dry ice and the cold insulation agent descends from the pre-cooling space S2 through the hole 3a of the middle shelf 3 and the cold air induction portion 6, and indirectly cools the cold insulation space S1. The space S1 can be maintained at a predetermined cold insulation temperature for a long period of time. In addition, the cold heat of the dry ice is transmitted to the ice pack to enhance the cold storage capacity of the ice pack, and even after the dry ice has sublimated, the ice pack alone exerts its cold storage capacity and provides an effective cold storage effect. Can be maintained. Further, since the pre-cooling space S2 for storing the dry ice and the cold insulation agent is isolated from the cold insulation space S1, the door portion 2 is changed from the closed position to the open position when the object to be cooled is taken in and out of the cold insulation space S1. However, if the door portion 5 dedicated to the pre-cooling space is in the closed position, it is possible to avoid a problem that the temperature of the pre-cooling space S2 temporarily rises due to the influence of the outside air temperature, and the predetermined pre-cooling temperature is maintained. Can be done. Then, when the object to be cooled is taken in and out of the cold storage space S1, the cold air in the precooling space S2 is transmitted to the cold storage space S1 through the cold air induction unit 6, so that the temperature of the cold storage space S1 immediately rises due to the influence of the outside air temperature. It is possible to prevent the situation and maintain an appropriate cold insulation temperature. Further, during the cold insulation period, the door 2 and the door portion 5 dedicated to the pre-cooling space can be opened to easily replenish the tray 4 with dry ice or replace the cold insulation agent.

Further, in the present embodiment, since each cold air guiding portion 6 is composed of a pipe material, a cold storage X provided with each cold air guiding portion 6 is realized without inviting a complicated structure and a significant cost increase. can do.

The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the cold air guiding portion 6 made of a square tubular pipe material is illustrated, but the cold air guiding portion 6 made of a round tubular pipe material can also be applied.

Further, a plurality of cold air guiding portions may be provided intermittently along the inner circumference on the inward surface of the upright wall (side walls 11, 12 and rear wall 13 in the above embodiment), as described above. In addition to the mode in which a plurality of cold air guiding portions are arranged at equal pitches as in the embodiment of the above embodiment, a mode in which a plurality of cold air guiding portions are arranged at unequal pitches (not shown) may be used. Further, as shown in FIG. 8, a group of cold air guiding portions 6G in which a plurality of cold air guiding portions 6 are lined up continuously along the inner circumference on the inward surface of the standing walls (side walls 11, 12, rear wall 13). It is also possible to consider it as one unit and adopt a mode in which the cold air induction unit group 6G is arranged at equal pitches or unequal pitches.

Shows an example of application of the square pipe member or a round pipe member as cool air guiding portion above, but that constitutes the cool air guiding portion in the corrugated plate is Ru best embodiment der of the present invention. The corrugated plate is formed by curving a metal plate such as stainless steel or a plastic plate in a wavy shape, and the wave pitch and cross-sectional shape defined by the uneven shape are not particularly limited. As illustrated in FIG. 9, when the cold air guiding portion 6 is composed of a corrugated plate, a plurality of cold air guiding portions 6 are continuous along the inner circumference on the inward surface of the upright wall (side walls 11, 12, rear wall 13). The cold air induction group 6G arranged so as to be formed can be formed relatively easily. The corrugated cross-sectional shape of the corrugated sheet may be a shape consisting only of a curved surface, a shape combining a curved surface and a straight line, or a shape consisting only of a straight line (trapezoidal triangular shape). There may be.

In the above-described embodiment, a configuration in which a plurality of cold air guiding portions are provided along the inner circumference is exemplified on all of the upright walls of the cold storage body (side walls 11, 12, and rear walls 13 in the above-described embodiment). A configuration in which a plurality of cold air guiding portions are provided along the inner circumference only on one of the standing walls of the cold storage body (side walls 11, 12, and rear walls 13 in the above embodiment), or a cold storage. A configuration in which a plurality of cold air guiding portions are provided along the inner circumference on a plurality of (excluding all) standing walls arbitrarily selected from the standing walls of the main body (side walls 11, 12, and rear walls 13 in the above embodiment). May be adopted. The position and shape of the holes in the middle shelf may be appropriately formed according to the location of the cold air guiding portion and the shape of the cold air guiding portion.

As the door part and the door part dedicated to the precooling space, in addition to the rotary door part exemplified in the above-described embodiment, a double-openable rotary door, a foldable door, a shutter type door, or a sliding door type door, etc. Various things such as a fitting type door can be applied.

The middle shelf may have heat insulating properties, and the specific material, laminated structure, and the like can be changed as appropriate.

The dry ice and the ice pack may be stored as they are in the pre-cooling space without using a tray.

In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... Cold storage body 2 ... Door part S1 ... Cold storage space S2 ... Pre-cooling space 3 ... Middle shelf 3a ... Hole 5 ... Door part dedicated to pre-cooling space 6 ... Cold air induction part X ... Cold storage

Claims (1)

A cold storage space that can accommodate cold objects and
A pre-cooling space formed above the cold storage space and containing dry ice and a cold storage agent,
A heat-insulating middle shelf that separates the cold storage space and the pre-cooling space from each other,
A cold storage main body having the cold storage space and the pre-cooling space in the internal space and opening in a predetermined direction,
A door portion that can open and close the opening of the cold storage body, and
A door portion dedicated to the pre-cooling space that separates the pre-cooling space from the external space is provided.
On the inward facing surface of the upright wall of the cold storage body facing the cold storage space, the upper end communicates with the pre-cooling space through a hole formed in the middle shelf, and the lower end is on the bottom wall or the vicinity of the bottom wall of the cold storage body. refrigerator, characterized in that it intermittently plurality along the inner periphery cool air guiding portion which is constituted by a corrugated plate it reaches.

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