KR960010265B1 - Refrigerating apparatus - Google Patents

Abstract

The apparatus and method arbitrarily changes the refrigerating space without varying the refrigerating capability, and refrigerates the fresh food under a condition appropriate for the kind of the food. The apparatus comprises: a cooling air chamber(2) having a heat insulation structure; a plurality of storage chambers(5) having a space(4) making the cool air flow; a cooling unit(3) selectively supplying the cool air for the cooling air chamber(2) and the storage chambers(4).

Description

Fresh food refrigeration system and fresh food refrigeration method

1 is a principle diagram showing a planar view of one embodiment of an industrial refrigerator of the present invention,

2 is a principle diagram shown in cross section along the line II-II of FIG.

FIG. 3 is a schematic diagram showing the relationship between cold storage and storage of warehouses according to line III-III of FIG.

FIG. 4 is a schematic diagram showing the relationship between the cold store and the warehouse of the warehouse according to the IV-IV line of FIG.

5 is a schematic diagram showing another embodiment of the present invention in cross section along line IV-IV,

6 is a schematic diagram showing another embodiment of the present invention in cross section along line III-III,

7 is a longitudinal sectional view showing an example in which the refrigerator of the present invention is carried out on a commercial refrigerator.

* Explanation of symbols for main parts of the drawings

1: storage facility, 2: cold storage,

3: cooling unit, 4: space,

5: storage, 14: humidity control unit,

25: operation storage, 32: refrigerator radiance equivalent to cold storage,

33: Refrigeration unit for the refrigerator, 35: Storage.

The present invention relates to a refrigeration apparatus for storing fresh food and the like and a method for refrigerating fresh food. More specifically, the present invention is to provide a method for efficiently storing fresh food by improving the cooling structure of the fresh food storage device.

Conventionally, in the distribution mechanism of fresh food such as vegetables, fruits, meat or fish and shellfish, as a storage warehouse to maintain the quality so as not to lose freshness at a time between collection and delivery, for example, a large refrigerator warehouse of 100-200 pyeong Is being used. In addition, electric refrigerators are used for storing fresh foods and the like in general homes. The basic principle of these industrial refrigerated warehouses and home refrigerators is the same, and it cools in a refrigerator by blowing cold air obtained by a cooling unit into an insulated inside.

Therefore, there is a need for a cooling unit that has a cooling capacity consistent with high contents for storing fresh food. Here, the cooling unit means a facility or the like that cools and supplies air by using a refrigeration cycle.

To this end, according to the conventional refrigeration apparatus, when a large refrigerated warehouse or a refrigerator is made, a large refrigeration unit is required, and the cost of the mechanical equipment is very high and an installation place is required.

In addition, when a large cooling unit is provided, the entire warehouse is continuously cooled regardless of the amount of fresh food stored, which consumes a large amount of energy and electricity, requires a huge operating cost and wastes energy. Will be used.

In addition, as a conventional refrigeration apparatus, since dry cold air deprives fresh food of moisture, there is a problem that it is not suitable for long-term preservation (or preservation of freshness) of fresh food such as tangerines, pears and apples. . On the other hand, some fresh foods do not require humidity, such as potatoes or sweet potatoes. For this reason, in order to achieve a sufficient storage effect, it is necessary to create detailed refrigeration conditions according to the type of fresh food to be stored, but a conventional refrigeration apparatus cannot partially store humidity.

The present invention provides a fresh food refrigeration apparatus that can arbitrarily increase or decrease the storage volume without changing the cooling capacity. Specifically, the fresh food refrigerator can be cooled as a relatively small cooling unit that can cool a large volume storage much larger than the cooling capacity. An object of the present invention is to provide a food refrigerating device and a method of refrigerating fresh food.

In addition, an object of the present invention is to provide a fresh food refrigeration apparatus and a fresh food refrigeration method that can create a suitable refrigeration conditions for each type of fresh food to be stored.

In order to achieve the above object, the fresh food refrigerator of the present invention is a cold storage of a heat insulation structure and a plurality of storages of a heat insulation structure accommodated and substantially sealed in this cold storage structure. A double storage unit is provided with a space for allowing cold air to flow therebetween, and a cooling unit for selectively supplying cold air to the space between the cold storage space and the storage space and a substantially independent space within each storage space is further provided. In order to cool the space between the cold storage and the storage and each storage space one by one sequentially, only the space between the cold storage and the storage in the state where all the space is cooled to control the temperature.

Here, the maximum volume of the reservoir is preferably set to be smaller than or approximately equal to the volume of the space between the cold refrigerator and the reservoir so as to minimize the cooling capacity of the cooling unit.

In addition, in the fresh food refrigerator according to the present invention, the cold refrigerator and the reservoir are assembled by a heat insulating panel material which forms a space in which cold air flows between at least two heat insulating material walls, and a plurality of insides thereof are formed by a panel of heat insulating material. It is divided into a store of.

In addition, the fresh food refrigerator according to the present invention is characterized in that the reservoir is formed from a container formed by a heat insulating material, and has a means for allowing entry into and out of the cold store and individually connected to the cooling unit to introduce cold air.

More preferably, the fresh food refrigerating device of the present invention comprises a humidity control unit for adjusting the inside of the storehouse to a humidity suitable for storage, or a means for installing an evaporation stand containing ice or stirring the air in the storehouse. Have

Therefore, in order to cool the whole refrigerating apparatus, each reservoir is closed and the cold air supplied from a cooling unit is introduce | transduced into the space between a reservoir and a cold reservoir, and the periphery of a reservoir is cooled to predetermined temperature.

Cooling in the reservoir opens the reservoirs one by one or as many as the cooling capacity of the cooling unit, introduces cold air therein, and cools them to a predetermined temperature. When the inside of the cellar cools to a predetermined temperature, the cellar is closed and the next cellar is opened to introduce cold air therein.

In this way, the cold air is sequentially introduced into the cellar and cooled to a predetermined temperature. After all the cellar cools, only a narrow space between the closed cellar and the cold cell is connected to the cooling unit to cool, thereby preventing the outside temperature change of the refrigerator. And keep the inside of the reservoir at the predetermined temperature.

If the storage has a temperature control unit, the storage is sealed after cooling, and the storage is kept at a constant temperature by cold air flowing between the storage and the cold storage from the surroundings. Humidification is required for each cellar up to a humidity suitable for the storage of fresh food to accommodate the atmosphere within. In order to maintain the humidity at approximately 100%, a temperature of 4 ° C. or more is required. It may also be considered after the humidity has been sufficiently adjusted to a predetermined humidity in advance.

Hereinafter, the configuration of the present invention will be described in detail according to the embodiment shown in the drawings. In addition, this embodiment shows the case where the refrigerator of the present invention is applied to an industrial warehouse.

1 to 4 illustrate an embodiment in which the refrigerator of the present invention is applied to an industrial refrigerator.

This industrial refrigeration warehouse is a dual-storage storage facility consisting of an insulated cold storage (2) and a plurality of insulated storage (5, ..., 5) having sufficient space (4) to flow cold air therein. It consists mainly of (1) and the cooling unit 3 which supplies cold air sequentially in the space 4 and each storage 5, ..., 5.

The cold store 2 is free of insulation structures or insulation materials made of, for example, ceilings 2a, side walls 2b and, if necessary, floorings 2c using insulation aids such as insulation or heat reflective film. As a structure of a heat insulation structure, it is provided so that the heat | fever input from the outside may be interrupted | blocked. On the side wall 2b of the cold storage 2, for example, on the front side, a position corresponding to each reservoir 5, ..., 5, or a position common to the plurality of reservoirs 5, ..., 5, or in one position as a whole An entrance 2d of fresh food to be refrigerated is provided. The doorway 2d is sealed by the door 2e of a heat-insulating structure which can be opened and closed, and further, an air curtain device (not shown) is provided as a non-contact seal as needed. Of course, if necessary, an entrance may be provided at the ceiling 2a or the floor 2c of the cold storage 2e.

The reservoir 5 is structurally insulated like the cold store 2, for example with the ceiling 5a, the side walls 5b and, if necessary, with insulation or without the use of insulation. As a structure, the space 4 which is sufficient to flow at least cold air between the cold storage 2 is formed in the circumference | surroundings. For example, as shown in FIGS. 3 and 4, all surfaces 5a, 5b, and 5c are made of a material having excellent heat insulating properties, and cold air flows between the cold air chambers 2 around them. It is provided so that the comparatively narrow space 4 may be formed.

Therefore, the surrounding space 4 of the reservoir 5 and the cold air flowing in the space 4 function as a heat insulation layer, and the heat which has not been blocked by the cold storage 2 of the heat insulation structure 5, ..., 5 To prevent intrusion into That is, the circumference | surroundings of the reservoir 5 are maintained in the winter state, and the temperature change in the reservoirs 5, ..., 5 is suppressed. In addition, the storage 5 is installed above the floor 2c of the cold storage 2 via the support member 6 made of heat insulating material, preferably under the floor of the storage 5. It is installed so that cold air flows.

Moreover, the side wall 5b of the storage 5, for example, the front wall, is provided with the entrance 5d of fresh food to be refrigerated. This entrance 5d is sealed by the heat insulating structure door 5e which can be opened and closed. In addition, the air curtain apparatus may be employ | adopted instead of or in combination with the heat insulation structural door 5e.

As shown in the figure, the cellar 5 can be integrally connected by forming a plurality of cellars 5, ..., 5 by partitioning the panel 7 of the heat insulating material, but the present invention is not particularly limited thereto. A large number of things may be installed in the cold store 2. In addition, although the volume of this storage 5 may differ for each storage, it is necessary for the storage 5 of the largest volume to be the volume within the cooling capacity of the cooling unit 3. As shown in FIG. In other words, the cooling unit 3 needs to have a cooling capacity capable of cooling the reservoir 5 of the largest volume at least to a temperature suitable for storage.

In addition, the space 4 between each of the reservoirs 5, ..., 5 and the cold air chamber 2 functions as a heat insulating layer and is utilized as a flow path sufficient for cold air to flow, and as narrowly as possible. Is set to be. The volume of this space 4 needs to be in the cooling capacity range of the cooling unit 3. Therefore, it is preferable to set the volume of the storage tank 5 of the largest large volume to be about the same as or smaller than the volume of the space 4. Thus, the cold storage 2 can be enlarged in size so that the volume of the space 4 does not exceed the cooling capacity of the cooling unit 3, and a plurality of storages 5, ..., 5 can be installed therein.

For example, according to the experimental plant produced by the present inventors, the three-ply cooling unit 3 is operated by operating a 30-ply warehouse in which ten three-ply storages are installed.

In theory, the cold storage (2) such that the maximum volume of the reservoir (5) is within the cooling capacity range of the cooling unit (3) and the volume of the space (4) is within the cooling capacity range of the cooling unit (3). It is possible to operate by setting the size and the number of the storage (5), it is possible to operate the refrigerator at least 10 times-50 times the case of using a cooling unit of the cooling capacity as in the prior art.

Moreover, when employing a large cooling unit rather than a small cooling unit, the relationship between the maximum volume of the storage and the volume of the space 4 described above is not particularly limited. In this case, the advantage of miniaturizing the cooling unit 3 will be lost. However, once the entire cooling unit is cooled, only the narrow space 4 outside the reservoirs 5,. There are advantages to it.

In addition, since the temperature change in the storage 5 is very small, this storage facility 1 requires a considerable time (for example, several hours) until the cooling air supply is required once cooling to a predetermined temperature is completed again. In particular, when ice is stored in each storage (5, ..., 5), the temperature in the storage (5, ..., 5) rarely rises, so a large temperature change does not occur unless a considerable time passes. Here, after one storage facility 1 is cooled, another storage facility can be cooled by using the time until the storage facility 1 needs cooling again. That is, the common use of the cooling unit 3 can be achieved, and by sequential cooling of the storage facility, the volume warehouse which is tens of times the original cooling capacity of the cooling unit 3 can be cooled. For example, it is possible to cool a volume warehouse 10 to 50 times the cooling capacity of the cooling unit 3.

The cold storage unit 2 and the reservoirs 5, ..., 5 are connected to the cooling unit 3 via the cold air supply duct 8 and the switching means 9, respectively. The space between the space 4 and each reservoir 5 is selectively connected to the cooling unit 3 as necessary, so that cold air flows.

The switching means 9 is for selectively connecting the plurality of cold air supply ducts 8,..., 8, connected to the space 4 and the respective reservoirs 5,..., 5, to one cooling unit 3. For example, a spool type switching edge is used.

In the present embodiment, the cooling unit 3 is installed outside the cold store 2, and after cooling the outside air, the cooling unit 3 is selectively supplied to the cold store 2 or the reservoirs 5, ..., 5, while the space 4 Or air in the reservoir 5 from the exhaust means 10 to the atmosphere.

As the exhaust means 10, for example, an exhaust pipe 11 connected to each of the reservoirs 5,..., 5 and the space 4 independently, and a relief valve in which these exhaust pipes 11 are collectively connected in series ( V) 12, which is provided so as to automatically exhaust when the pressure in each reservoir 5, ..., 5 or the pressure in the space 4 reaches a constant pressure.

Therefore, even after cooling the inside of the reservoir 5 to a predetermined temperature, if the old air is discharged from the exhaust means 10 by supplying new cold air from the cooling unit 3 periodically or as necessary, the air in the reservoir 5 is discharged. It can be stirred. In other words, in the present embodiment, the stirring unit is configured to stir the air in the reservoir 5 by the cooling unit 3 and the exhaust means 10. In addition, the cooling unit 3 is not particularly limited to the above-described external acyclic system, and air is provided between the cooling unit 3 provided outside the cold storage unit 2, the respective storage units 5, and the space 4. You may employ | adopt the cooling unit of the type which circulates or the type | mold which cools the air in the cold storage 2 by installing the cooling unit 3 in the cold storage 2.

In addition, blowing cold air into the space 4 between the cold storage 2 and the storage 5 is performed from the vicinity of the ceiling 2a of the cold storage 2 using the cold supply supply duct 8. Blowing towards the ceiling is desirable. Thereby, cold air can flow uniformly along the wall of the reservoir 5, and can evenly cool the circumference | surroundings of the reservoir 5. In addition, it is preferable to blow cold air from the vicinity of the ceiling 5a in the storage 5 from the point of cooling efficiency. Of course, the blowing position and the blowing method of cold air are not particularly limited to the above-described method, and can be appropriately changed as necessary.

In addition, the stirring means is not particularly limited to the above-mentioned one, and is not illustrated. For example, the opening / closing cold air inlet and the air in the storage 5 are forcibly forced out of the space 4 or the cold storage 2. The draft pressure of the cold air supplied from the cooling unit 3 to the space 4 by opening vent openings which can be opened and closed on two or more walls (preferably facing each other), respectively. It is possible to use a draft system by draft draft or a system for injecting cold air by natural ventilation or a forced stirring device such as a fan or a circulator.

Here, the vents may be opened and closed manually, as well as by an actuator operated by a remote control or a temperature sensor.

In addition, the humidity control unit 14 is provided in the storage 5 as needed. As the humidity control unit 14, for example, an ultrasonic humidifier, a humidifier by heating a heater, an atomizer, a water tray, a panel on which paper or felt is absorbed, an evaporation tray in which water is added to ice or ice, and humidification The combination of a means and a dehumidifier is mentioned, but the use of an ultrasonic humidifier or an evaporation tray containing ice (adding water as necessary) is preferable. As the humidity adjusting unit 14, any of the ones in which the humidity in the reservoir 5 can be adjusted to a predetermined humidity by its own operation, and a combination of a humidifier and a dehumidifier can be used.

However, in order to avoid the enlargement of the apparatus and the increase of equipment cost, the present embodiment employs a humidifier as the humidity adjusting unit 14, installs it near the ceiling, sprays water vapor, and opens and closes when the humidity exceeds a set value. The inlet 13 is opened to put dry cold air to dehumidify. In addition, when humidity of 90% or more is required, an evaporation tray containing ice and water is installed in the storage 5. In addition, the humidity in the storage 5 is measured by a humidity sensor or a hygrometer and is always monitored. In addition, although not shown, it is also preferable to provide a deodorizing and odor removing device in the storage 5.

Fresh food refrigerated warehouses configured as described above are used as follows.

First, the cooling unit 3 is operated to supply cold air to the space 4 between the cold storage 2 and the storage 5 and to cool the space 4 to a predetermined temperature, that is, to a temperature suitable for storage. . At this time, all the reservoirs (5, ..., 5) are closed so that the cold air is supplied only to the space (4) between the cold (2) and the reservoir (5).

On the other hand, when the pressure in the space 4 reaches a certain pressure or more, the relief valve 12 is opened to discharge the air in the space 4 to the outside.

Thus, while the air in the reservoir 5 is exhausted through the exhaust pipe 11 and the relief valve 12, the inside of the reservoir 5 is filled with cold, and when the reservoir 5 reaches the desired temperature, the reservoir 5 ) Stop the cold air supply.

Thereafter, cold air is supplied into the reservoirs 5, ..., 5 sequentially to cool the inside of each of the reservoirs 5, ..., 5 to a predetermined temperature. Thus, when all the reservoirs 5,..., 5 reach a predetermined temperature, the switching means 9 is operated to supply air to the space 4 between the cold store 2 and the reservoir 5 again and then to the cooling unit ( The connection of 3) is changed, and when there is a temperature change in this space 4, it flows and cools.

Moreover, in each storage 5, ..., 5, the humidity suitable for the fresh food stored by the humidity adjusting unit 14 is obtained, and this is hold | maintained. When the desired storage conditions are reached, fresh food is brought into each of the reservoirs 5, and the cooling operation described above is repeated to readjust the storage conditions according to the fresh foods stored in each of the reservoirs 5, ..., 5, respectively. .

Thereafter, only the space 4 is cooled in accordance with the temperature change in the space 4, and the inside of the reservoirs 5, ..., 5 is kept at a constant condition. The room is always at a low temperature and the desired humidity is maintained so that long-term refrigeration can be performed without losing freshness. For example, in the storage of pumpkins and sweet potatoes that do not require humidity, but rather dry, keep vegetables at low temperatures as they are filled with dry cold air without humidification, and store vegetables such as cabbage that require high humidity. After storing the cool air and cooling it to a predetermined temperature, the storage cell may obtain a predetermined high high humidity by humidification by the humidity adjusting unit 14, or after sufficiently humidifying the humidity adjusting unit 14, and blows the cold air to a predetermined temperature. Humidity may be performed simultaneously until cooling or 4 ° C.

In addition, although the above-mentioned embodiment is an example of implementation suitable for this invention, it is not limited to this, A various deformation | transformation is possible in the range which does not deviate from the summary of this invention.

For example, in the above-described embodiment, the cold storage 2 and the storage 5 are respectively dried by an insulation panel, but are not particularly limited thereto. For example, as shown in FIG. You may make it dry simultaneously with a cold store and a storage by the heat insulation panel 2 used as the double wall provided. In this case, the inner wall and the outer wall of the heat insulating material panel 20 are connected by the spacer 21 of the heat insulating material to secure a constant space 4 to constitute one panel.

In the space 4 of each panel 20, cold air supply ducts 8 and 8 are provided. Then, the inside of the storage facility 1 constructed by the double wall panel 20 is partitioned into a plurality of spaces 4,. ..., 5) is constituted. In this case, the entrance and exit of the cold storage 2 and the storage 5 is constituted by a double wall insulation panel or a single wall insulation panel of the same shape, and is installed to open and close the cold storage 2 and the storage 5 at a time. have. In this case, since the cold store 2 and the store 5 can be constructed at the same time, it is possible to significantly reduce the construction cost period.

Furthermore, the reservoir does not need to be fixedly installed in the cold store 2, but may be of a structure that can be moved in and out of the cold store 2. For example, as shown in FIG. 6, the movable storage 25, such as a box or a container comprised of a heat insulating material, is loaded or accommodated in the cold storage 2, and the space 4 between the cold storage 2 is carried out. Install it. In this case, it is preferable to provide a roller 26 on the floor 2c of the cold store 2 to facilitate the entry and exit of the large movable storage 25.

In addition, the movable storage 25 is provided with cold air inlet means 27 which is easily connected to the cooling unit 3 installed together with the cold air box 2 so as to introduce cold air.

For example, a cold air inlet duct and an exhaust duct having a one-touch joint (quick disconnect couping) are provided on the movable storage 25 side, and the cold air supply duct 8 of the cooling unit 3 and the exhaust pipe of the exhaust means 10 are provided. A cold air inlet means 27 connectable to the 11 is provided, the movable reservoir 25 is housed in the cold compartment 2, and connected to the exhaust means 10 and the cooling unit 3, as necessary. Can be blown.

Moreover, as a simple structure, as shown in FIG. 6, the cold air inlet means 27 is comprised by the opening and closing of the duct introduction opening, and when it is accommodated in the cold compartment 2, the cover is opened and the cold air supply duct 8 and It is also possible to allow the exhaust pipe 11 to penetrate.

It is preferable to install the same thing as the side which opens and closes only by connecting to a cold air inlet pipe. In this case, the storage itself can be loaded into the distribution process and used as a container transport repeater or the like.

In addition, the present embodiment has been described in the case of applying to a large refrigeration apparatus such as an industrial refrigerator, but is not particularly limited thereto, but is much smaller than the refrigerator, for example, for use in electric refrigerators for work or home use It is also possible.

For example, as illustrated in FIG. 7, a plurality of independent storage bins 35 having a heat insulating structure are disposed in the heat insulating refrigerator body (corresponding to the refrigerator 2) 32, and the refrigerator A space 34 through which cold air flows is formed between the housing 32 and the storage 35. In other words, a plurality of reservoirs 35 and 35 having a door 35e of a heat insulating structure that can be opened and closed again inside the refrigerator housing 32 having a door 32e of a heat insulating structure that is open and close enough to allow cold air to flow therebetween. The space 34 is provided, and the cooling unit 33 which can supply cold air sequentially in each storage 35 and 35 and the space 34 is provided. The cold air supplied from the cooling unit 33 provided outside the refrigerator housing 32 is provided in the space 34 by the cold air supply duct 38 via the switching means 39, or in one of the refrigerators 35, It is introduced in 35). In the storage 35, the humidity control unit (not shown) which kept predetermined | prescribed humidity in the said storage is provided as needed. The humidity control unit in this case is comprised by the humidification means and the means (not shown) which blows in cold air from the space 34 around the storage 35, and the humidified means humidified by the humidification means was carried out in the space 34 It is installed to be controlled by blowing dry cold air. The cold air intake means is constituted by a cold air intake, generally referred to as a damper for a refrigerator, a door of an insulating structure for opening and closing the intake, and an actuator for opening and closing the door. In this refrigerator, the cooling and humidity adjusting methods are also the same as those of the cold storage shown in Figs. 1 to 4, and thus their explanation is omitted.

As is clear from the above description, the fresh food refrigerator of the present invention is a double refrigerator having a cold storage of an insulating structure and a plurality of storages of an insulating structure that are accommodated in the cold storage and are substantially sealed. And a cooling unit for supplying cold air selectively to the space between the cold storage and the storage space and to a substantially independent space within each storage space, and the cooling unit further includes the space between the cold storage space and the storage space and each storage space. Since the inside is cooled sequentially in each space, and all the spaces are cooled, only the space between the cold storage and the storage space is controlled so that a relatively small capacity having sufficient cooling capacity to cool the at least one storage space is achieved. The cooling unit can keep a large number of reservoirs at a temperature suitable for storage.

That is, a small cooling unit can cool a large volume of storage, it does not take much place in a cooling unit, and the installation cost is also possible at comparatively low cost.

In the present invention, when the cold storage and the storage compartment are assembled by a heat insulation panel member which forms a space in which cold air flows between at least two heat insulating material walls, and the inside is partitioned into a plurality of reservoirs by a panel of the heat insulating material, It can be dried at the same time as the cold store, and can drastically lower the equipment cost.

In addition, since the refrigerator of the invention can keep the inside of the storage at a predetermined low temperature by cooling the closed storage after the inside of the refrigerator is cooled to maintain a small temperature between the surrounding cold storage at a constant temperature, it is consumed during operation. There is little amount of energy to say and can make running cost extremely cheap.

That is, by cooling only a part of the storage facility capacity, energy can be saved because the entire storage facility can be maintained at a constant temperature at all times.

In addition, when the humidity control unit is installed in the storage, the sealed air can be adjusted to a predetermined humidity in each storage, so that suitable humidity conditions can be set for each fresh food to be stored, and various fresh foods are kept out of the air. By maintaining the temperature and humidity suitable for storage, it can be stored for a long time without losing freshness.

Claims (9)

A plurality of reservoirs of a cold storage of an insulating structure and a heat insulating structure contained in and substantially enclosed in the cold storage constitute a double storage having a space in which cold air flows therebetween, and a space between the cold storage and the storage. And a cooling unit for selectively supplying cold air to a substantially independent space in each storage. 2. The fresh food refrigerator according to claim 1, wherein the cold refrigerator and the reservoir are assembled by a heat insulating panel material which forms a space in which cold air flows between at least two heat insulating material walls. The fresh food refrigerator according to claim 1, wherein the reservoir is divided into a plurality of reservoirs by an inner panel of the heat insulating material. 2. The fresh food refrigerator according to claim 1, wherein the reservoir is formed from a container formed by a heat insulating material, and has a means for allowing entry into and out of the cold storage compartment and individually connected to a cooling unit to introduce cold air. . The fresh food refrigerator according to claim 1, wherein the maximum volume of the reservoir is less than or substantially equal to the volume of the space between the cold store and the reservoir. 5. The fresh food refrigerator according to claim 1 or 4, wherein a humidity control unit for adjusting the inside of the refrigerator to a humidity suitable for storage is provided in the storage. The fresh food refrigerator according to claim 1, further comprising a means capable of stirring the air in the reservoir. 7. The fresh food refrigerator according to claim 6, wherein ice is contained in the storage. A plurality of reservoirs of a cold storage of an insulating structure and a heat insulating structure contained in and substantially enclosed in the cold storage constitute a double storage having a space in which cold air flows therebetween, and a space between the cold storage and the storage. And a cooling unit selectively supplying cold air to a substantially independent space in each storage space, wherein the cooling unit cools the space between the cold storage space and the storage space and the inside of each storage space one by one. Fresh food refrigeration method characterized in that to control the temperature only the space between the cold storage and the storage in the space cooled state.