JP3053623B1 - Fresh food storage equipment - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To effectively use the heat of fusion of snow or the like to cool the internal temperature of a storage to 0 ° C. or less, and to preserve fresh food products in an ideal environment for a long time. Reduces equipment and running costs and preserves perishable food products in an ideal environment extremely economically for long periods of time. SOLUTION: The method for storing fresh foods uses the heat of melting of ice and snow S to cool and store the stored fresh foods. The method of storing fresh foods is to dissolve solutes such as salt and calcium chloride in ice and snow S, reduce the melting point of ice and snow S to 0 ° C. or less by molar descent, and store fresh foods stored in the storage 1. Store in a cool state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, mainly, by effectively utilizing the heat of fusion such as natural snow and ice, vegetables, fresh fish, about the equipment you storage by cooling the fresh food of meat, and the like.

[0002]

2. Description of the Related Art In a heavy snowfall region, a method of storing winter snow and preserving fresh foods throughout the year is disclosed in, for example, JP-A-10-267484 and JP-A-7-79637.
No. in the official gazette. The methods described in these publications can significantly reduce the running cost because fresh food can be stored in a cooled state by using heat of melting of snow. Since snow has an extremely large heat of fusion of 80 cal / g, it absorbs a large amount of heat energy from the surroundings when it melts. For this reason, the snow put in the storage in winter can be gradually melted, and the storage can be cooled for one year. This method has an advantage that fresh food can be stored in a cooled state extremely economically because energy is not consumed for cooling the storage.

[0003]

However, the method using the heat of melting of snow is limited by the cooling temperature of the storage. This is because snow melts at 0 ° C. The temperature in the storage cooled by snow melting at 0 ° C. does not reach 0 ° C.
The lowest temperature for snow cooled storage is 3-5 ° C.
For this reason, the method using the heat of melting of snow does not always allow fresh food products to be cooled to an ideal temperature and stored. The ideal temperature for long-term storage of perishables is the lowest temperature that does not freeze the water contained in the perishables. Water contained in fresh food does not freeze at 0 ° C. This is because various substances are melted in water contained in perishable foods to lower the melting point. Thus, the ideal temperature for storing fresh food products is in the range of 0-5C.

[0004] In addition, fresh food products can be stored in a frozen state for a long period of time. However, in the method using the melting heat of ice and snow, the temperature cannot be reduced to 0 ° C. or less, so that it cannot be frozen at all.

[0005] The interior of the storage using ice and snow is disclosed in Japanese Patent Laid-Open No. 9-7 / 1997.
As described in Japanese Patent No. 4893, cooling can be performed to 0 ° C. or lower by using a cooler. However, it is necessary to use a large-capacity cooler in order to lower the temperature in the refrigerator with the cooler. This is because the storage using ice and snow has an advantage that a large amount of fresh food can be stored, and the whole is extremely large. Furthermore, the use of a cooler in a method of cooling a storage using the heat of melting of ice and snow has a serious disadvantage. This is because ice and snow are not melted at all because the inside temperature is set to 0 ° C., and the storage heat cannot be cooled by the heat of melting of ice and snow. Therefore, in the method of cooling the inside of the storage to 0 ° C. or less by the cooler, the heat of melting of ice and snow cannot be directly used, and the inside of the storage needs to be cooled to 0 ° C. or less by the cooler.

[0006] For this reason, the equipment cost becomes extremely high and the running cost also becomes high, and there is a disadvantage that fresh food cannot be stored economically for a long period of time.

The present invention has been developed in order to solve such disadvantages. An important object of the present invention is to reduce the internal temperature of a storage to 0 while effectively utilizing the heat of fusion of snow and the like. It is an object of the present invention to provide a storage device which can cool perishable foods in an ideal environment for a long period of time by cooling it to a temperature of not more than ℃.

Another important object of the present invention is to provide a fresh food storage device which can reduce the equipment cost and the running cost and can store the fresh food in an ideal environment extremely economically for a long period of time. Is to do.

[0009]

[Means for Solving the Problems]

[0010] The onset Ming storage device according to claim 1, by utilizing the heat of fusion of ice and snow S, fresh food F which houses and stores the cooling. The storage device includes a solute supplier 2 and a temperature control circuit 3. The solute feeder 2 supplies a solute such as salt or calcium chloride to the ice and snow S, lowers the melting point of the ice and snow S to 0 ° C. or less by mole descent, and cools the storage 1 with the ice and snow S that has dropped in mole. . The temperature control circuit 3 detects the temperature of the storage 1 and controls the solute supply state of the solute supply device 2,
The temperature of the storage 1 is controlled to the set temperature.

Further, the storage device according to claim 2 of the present invention,
The heat exchanger 7 for circulating molten water by adding a solute is provided, and the heat exchanger 7 cools the air in the storage 1.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a fresh food storage device for embodying the technical idea of the present invention, and the present invention does not specify the storage device as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

The storage device shown in FIG. 1 includes a storage 1 for storing both ice and snow S and fresh food F, a temperature control circuit 3 having a temperature sensor 4 for detecting the temperature of the storage 1, and a temperature control circuit 3 for storing the temperature. And a fan 5 for forcibly circulating room air through the ice and snow S to which the solute has been added.

The storage device shown in FIG. 1 stores both ice snow S and fresh food F in a storage 1. However, the storage device of the present invention can store ice and snow in an ice and snow storage different from the storage 1 that stores the fresh food F. The storage device that separates the storage from the ice and snow storage is provided by circulating the air cooled by the ice and snow storage to the storage to cool the storage, or by providing the liquid cooled by the ice and snow storage 6 to the storage 1 as shown in FIG. The storage 1 is cooled by circulating through the heat exchanger 7. A device that stores both ice snow S and fresh food F in the storage 1 and cools the fresh food F can efficiently cool the fresh food F. Also,
The structure can be simplified.

The ice and snow S stored in the storage 1 is natural snow,
Alternatively, it is naturally frozen ice. Snow can be stored in large quantities by pressing. The amount of ice and snow S stored in the storage 1 is such that the storage 1 can be stored at a set temperature by heat of melting for a predetermined period. The storage device of the present invention includes a case where fresh food is cooled and stored for a long time, and a case where fresh food is cooled until it is frozen and stored in a frozen state. When stored for a long period of time or when frozen, the melting heat of the stored ice and snow S is used. For this reason, the storage amount of the ice and snow S is set to an amount that can absorb a sufficient heat of fusion.

When the snow and ice S is melted by adding a solute,
The melting point is reduced by the molar drop. The decrease in the melting point due to the molar drop is substantially proportional to the number of moles of the solute contained in the solvent water. And the molar drop of water is about 1.86.
Thus, when one liter of water contains one mole of solute, the melting point of the water due to the molar drop is -1.86 ° C. Thus, by melting a solute in water, the melting point of water decreases in proportion to the number of moles of the solute to be added. For example, adding 10 moles of solute to one liter of water lowers the melting point to about -18.6C.

Ice and snow S whose melting point has been lowered by the added solute cools the surroundings to 0 ° C. or less. The molar drop is proportional to the number of moles, not the weight of the solute added. Therefore, the decrease in the melting point with respect to the unit weight increases as the molecular weight decreases. The solute to be added to the ice and snow S is salt, calcium chloride, magnesium chloride, alcohol, or the like, and any of those dissolved in water can be used. Since salts and calcium chloride are inexpensive, running costs can be reduced. The alcohol can be boiled under reduced pressure and easily separated from the dissolved water and reused. The salt can also be recovered from the dissolved water using a reverse osmosis membrane or the like and used repeatedly.

The temperature control circuit 3 detects the temperature of the storage 1 and controls the amount of solute added to the ice and snow S. The temperature control circuit 3 includes a temperature sensor 4 for detecting a temperature in the storage 1.
And a control circuit (not shown) for controlling the solute feeder 2 with an output signal of the temperature sensor 4. In the storage device, when the temperature of the storage 1 becomes higher than the set temperature, the temperature sensor 4 detects this, and outputs a signal for supplying solute to the ice and snow S to the solute supplier 2. Furthermore, when the temperature of the storage 1 becomes higher than the set temperature, the storage device of FIG. 2 outputs a signal for forcibly blowing air to the storage 1 or circulating the refrigerant to the heat exchanger 7.

The solute supplier 2 supplies the solute to the ice and snow S based on a signal from the temperature control circuit 3. When a signal for supplying a solute is input from the temperature control circuit 3, the solute supplier 2 supplies the solute to the ice and snow S. The solute supply device 2 shown in the figure includes a hopper 8 for storing solutes and a feeder for supplying the solutes stored in the hopper 8 to ice and snow S. The illustrated solute feeder 2 uses a rotary feeder 9 as a feeder.

The lower portion of the hopper 8 of the solute feeder 2 shown in FIG. Rotary feeder 9
Connects the rotor 10 to the servomotor 11. The servo motor 11 rotates the rotor 10 with a signal supplied from the temperature control circuit 3 to supply solute to ice and snow S. When the rotor 10 rotates, the rotary feeder 9 discharges the solute supplied to the transfer chamber provided between the rotor 10 and the casing from the lower end. The solute discharged from the solute supplier 2 is added to the ice and snow S.

The melting point of the snow and ice S to which the solute is added is lowered by the molar drop due to the added solute. The melting point of the ice and snow S having a lowered melting point is lower than the temperature in the storage 1, and the surroundings are cooled to 0 ° C. or less by the heat of fusion.

In the storage device shown in FIG. 1, the air cooled to 0 ° C. or less by the heat of fusion is circulated into the storage 1 by the fan 5 so that the fresh food F in the storage 1 can be cooled to 0 ° C. or less. The storage device shown in FIG. 2 can cool the storage 1 to 0 ° C. or lower by circulating the liquid cooled to 0 ° C. or lower in the ice and snow storage 6 to the heat exchanger 7 provided in the storage 1.

FIG. 3 shows an example of a storage device using a liquid such as alcohol as a solute. In the storage device shown in this figure, the solute supplier 2 supplies alcohol to ice and snow S. When a signal for supplying a solute is input from the temperature control circuit 3, the solute supplier 2 supplies alcohol to the ice and snow S. The solute feeder 2 shown in the figure includes a tank 14 for storing alcohol, and a valve 15 for supplying the alcohol stored in the tank 14 to ice and snow S. The solute feeder 2 in the figure uses an electromagnetic valve as the valve 15. The valve 15 is opened and closed by a signal input from the temperature control circuit 3. When a signal for supplying alcohol to the ice and snow S is input from the temperature control circuit 3, the solute supplier 2 opens the valve 15, discharges the alcohol from the tank 14, and adds the alcohol to the ice and snow S. However, the solute feeder can add a liquid such as alcohol using a pump. Ice and snow S whose melting point has been lowered by the addition of alcohol melts at 0 ° C. or lower.
The liquid melted at 0 ° C. or lower is circulated to the heat exchanger 7 to cool the storage 1.

The storage device shown in FIG. 3 further includes a separator 16 on the discharge side of the heat exchanger 7. The separator 16 separates the liquid discharged from the heat exchanger 7 into water and alcohol. The separator 16 boiles a mixed solution of water and alcohol under reduced pressure, fractionates the alcohol using a difference in boiling point, and separates the alcohol from the mixed solution. Separator 16
The alcohol separated in the tank 14 of the solute feeder 2
And the separated water is drained. in this way,
The storage device provided with the separator 16 has a feature that the solute alcohol can be reused repeatedly.

Further, the storage device of the present invention may have a structure shown in FIG. In the storage device shown in this figure, the storage 1 and the ice and snow storage 6 are separated, and the refrigerant cooled in the ice and snow storage 6 is circulated to the heat exchanger 7 provided in the storage 1 to cool the storage 1. In this storage device, a heat exchange pipe 12 is provided inside the ice and snow storage 6. The surface of the heat exchange pipe 12 is cooled by the heat of melting of ice and snow S, and cools the refrigerant filled therein. The refrigerant cooled in the ice and snow storage 6 is circulated to the heat exchanger 7 to cool the storage 1.

The heat exchange pipe 7 is filled with heat exchanger 7
Salt water is preferably used as the refrigerant circulated through the cooling water. However, a liquid having a melting point of 0 ° C. or less, such as an aqueous solution of calcium chloride or an aqueous solution of magnesium chloride, may be used as the refrigerant. Further, the liquid used for the refrigerant can be obtained by dissolving a solute in water and lowering the melting point to an optimum value by a molar drop. The heat exchanger 7 in which the coolant cooled to 0 ° C. or lower can circulate the storage 1 to 0 ° C. or lower.

Further, in the storage device of the present invention, a cooling pipe 13 is provided on the ceiling of the storage 1 as shown in FIG.
In this cooling pipe, water melted at 0 ° C or less, or
The inside of the storage 1 can be cooled by circulating a refrigerant. The storage device absorbs heat from the cooling pipe 13, in other words, discharges cool air from the cooling pipe 13 to cool the storage 1, thereby cooling and storing the fresh food F. However, cooling pipes can be placed on the walls and floors of storage rooms.

[0029]

According to the fresh food storage device of the present invention, the internal temperature of the storage is cooled to 0 ° C. or less by effectively utilizing the heat of fusion of snow or the like, and the fresh food is stored in an ideal environment. There is a feature that can be stored for a long time. It is because the storage device of the present invention dissolves solutes such as salt and calcium chloride in ice and snow, and lowers the melting point of ice and snow to 0 ° C. or less by molar descent, utilizing the heat of melting of ice and snow, This is because fresh food items stored in the storage are cooled and stored. The melting point of ice and snow can be reduced to 0 ° C. or less by dissolving solutes such as salt and calcium chloride by molar depression. Therefore, the storage device of the present invention can cool the internal temperature of the storage to 0 ° C. or less by utilizing the heat of melting of snow or the like very simply, and can store fresh foods in an ideal environment for a long time. .

Further, the storage device of the present invention can cool the internal temperature of the storage to 0 ° C. or less by effectively utilizing the melting heat of ice and snow without using a large-capacity cooler as in the prior art. There is a feature that a large amount of fresh food can be stored in an ideal environment extremely economically for a long period of time by reducing equipment costs and running costs.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a storage device according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a storage device according to another embodiment of the present invention.

FIG. 3 is a schematic sectional view of a storage device according to another embodiment of the present invention.

FIG. 4 is a schematic sectional view of a storage device according to another embodiment of the present invention.

FIG. 5 is a schematic sectional view of a storage device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage 2 ... Solute supply machine 3 ... Temperature control circuit 4 ... Temperature sensor 5 ... Fan 6 ... Ice and snow storage 7 ... Heat exchanger 8 ... Hopper 9 ... Rotary feeder 10 ... Rotor 11 ... Servo motor 12 ... Heat exchange pipe 13 ... Cooling pipe 14 ... Tank 15 ... Valve 16 ... Separator S ... Ice and snow F ... Fresh food

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 3/00 A23L 3/36 F25D 3/02

Claims (2)

(57) [Claims] A storage device for cooling and storing a stored fresh food product (F) by utilizing heat of melting of ice and snow (S), wherein a solute such as salt or calcium chloride is added to ice and snow (S). The solute feeder (2) cools the storage (1) with the ice and snow (S) by lowering the melting point of ice and snow (S) to 0 ° C. Solute feeder by detecting temperature (2)
And a temperature control circuit (3) for controlling a solute supply state of the storage and controlling a temperature of the storage (1) to a set temperature. 2. The fresh food according to claim 1 , further comprising a heat exchanger (7) for circulating molten water by adding a solute, wherein the heat exchanger (7) cools the air in the storage (1). Grocery storage device.