JP2002257441A - System for taking out ice slurry, low temperature ice, and artificial snow in steam compression freezer utilizing anti-freezing solution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for generating and taking out low temperature ice slurry from a vaporizer in a steam compression freezer, low temperature ice from an ice concentrator, and low temperature artificial snow from a snow making machine by adding the anti-freezing solution having predetermined concentration to circulated water as an impurity, in a steam compression freezer utilizing the anti-freezing solution. SOLUTION: A title system for taking out ice slurry, low temperature ice, and artificial snow in a steam compression freezer utilizing an anti-freezing solution is adapted such that a steam compression freezer 6 includes a vaporizer 6a, a compressor 6b, and a condenser 6c, the vaporizer 6a leads circulation water 7 from an ice storage tank 8 and adds an anti-freezing solution 14 such as ethylene glycol having the predetermined concentration to the circulation water 7, and low temperature ice slurry 6d is taken out from the vaporizer 6a and simultaneously an ice concentrator 21 is assembled in the foregoing construction, from which ice concentrator 21 low temperature condensed ice (low temperature ice) is taken out from the ice concentrator 21, and further low temperature artificial ice 25a is generated and taken out with the aid of an ice making machine 25 coupled to the ice concentrator 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extracting low-temperature ice slurry from an evaporator provided in a steam compression refrigerator and a method for extracting low-temperature ice or artificial ice from an ice concentrator or a snow making machine separately provided in the steam compressor. Related to technology that can extract snow.

[0002]

2. Description of the Related Art Conventionally, an ice making technique using a steam compression refrigerator of this kind has a basic configuration as shown in FIG. To explain this, an ice slurry 5 containing water is made from the circulating water 2 for guiding the makeup water 2a by the steam compression refrigerator 1, and the concentrated ice 4 generated by the ice concentrator 3 is taken out from the ice slurry 5. Configuration.

[0003]

Since the prior art has the above-described configuration, the following problems exist. From the evaporator of the steam compression refrigerator 1 to the ice concentrator 3
Contains about 15% by volume of ice, for example. By the way, the freezing point of the ice slurry 5, that is, the freezing temperature is about 0 ° C., so that the low temperature ice slurry or the low temperature ice could not be taken out from the evaporator or the ice concentrator 3. In the prior art, the steam compression refrigerator 1
Some of the ice concentrators 3 include a snow making machine, but the snow making machine could not generate and extract low-temperature artificial snow. There is also a method of spraying a cryogen such as calcium chloride in order to lower the temperature of snow, but this is not desirable from an environmental point of view.

[0004]

According to the present invention, an antifreeze such as ethylene glycol having a predetermined concentration is added to circulating water flowing from the ice heat storage tank to the evaporator, and the freezing point of the circulating water is lowered to reduce the freezing point. A system for reducing the temperature of an ice slurry or ice produced by an evaporator or the above-mentioned ice concentrator, and taking out the same and using a snow making machine to remove low-temperature artificial snow. It is intended to be realized by the following configuration and means.

According to the first aspect of the present invention, a condenser having a cooling water closed circuit formed through an evaporator, a compressor, and a heat exchanger for guiding circulating water from an ice heat storage tank, and a condenser formed by the condenser. In a steam compression refrigerator comprising a circuit for returning water to circulating water, an antifreeze having a predetermined concentration is added to the circulating water, and a low-temperature ice slurry is taken out from the evaporator. 1 is an ice slurry removal system for a steam compression refrigerator.

According to the second aspect of the present invention, an ice heat storage tank, an ice concentrator for guiding ice to the ice heat storage tank, an evaporator, a compressor, and a heat exchanger for guiding circulating water from the ice concentrator are provided. An antifreeze having a predetermined concentration is added to the circulating water in a steam compression refrigerator including a condenser having a cooling water closed circuit formed therein and a circuit for returning the condensed water generated by the condenser to the circulating water. An ice slurry and a low-temperature ice removal system for a steam compression refrigerator using an antifreeze liquid, wherein a low-temperature ice slurry is removed from the evaporator and low-temperature ice is generated in the ice concentrator.

According to the third aspect of the present invention, an ice concentrator, a snow making machine that guides low-temperature ice from the ice concentrator, an evaporator, a compressor, and a heat exchanger that guides circulating water from the ice concentrator An antifreeze having a predetermined concentration is added to the circulating water in the condenser having a cooling water closed circuit formed therein and a circuit for returning the condensed water generated in the condenser to the circulating water. Removing a low-temperature ice slurry from the evaporator, generating low-temperature ice in the ice concentrator, and generating artificial snow in the snow making machine. Slurry and low-temperature ice and artificial snow removal system.

According to a fourth aspect of the present invention, the snow making machine comprises a rotary feeder or the like. It is an extraction system.

According to a fifth aspect of the present invention, the antifreeze having the predetermined concentration is a sodium chloride solution or a glycol solution, and is made of propylene glycol, ethylene glycol, dihydric alcohol or propanediol. An ice slurry, a low-temperature ice, and an artificial snow removal system for a steam compression refrigerator using the antifreeze according to claim 1, 2, or 3.

According to a sixth aspect of the present invention, the evaporator is provided with a stirrer.
An ice slurry, a low-temperature ice, and an artificial snow removal system for a steam compression refrigerator using the antifreeze described above.

According to a seventh aspect of the present invention, the heat exchanger is a heat exchanger for cooling water or a closed cooling tower, and the steam compression using an antifreeze solution according to the first, second or third aspect of the present invention. The ice slurry and the low-temperature ice of the refrigerator and the artificial snow removal system.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an ice slurry and a low-temperature ice for a steam compression refrigerator using an antifreeze according to the present invention;

[0013]

Embodiment 1 FIG. 1 shows Embodiment 1 according to the present invention, and is an arrangement diagram of an ice slurry extraction system of a steam compression refrigerator using an antifreeze.

Reference numeral 6 denotes a steam compression refrigerator, which is an evaporator 6
a, a compressor 6b and a condenser 6c. The evaporator 6a guides the circulating water 7 from the ice heat storage tank 8 and evaporates a part of the circulating water 7 by operating the compressor 6b while maintaining a low pressure. The compressor 6b pressurizes the steam introduced from the evaporator 6a under predetermined conditions. The condenser 6c introduces steam which has been pressurized and has a high temperature in the compressor 6b, and cools and condenses the steam with cooling water 10 introduced from a cooling water heat exchanger 15 or the like installed outside. .

Here, the ice heat storage tank 8, the evaporator 6a of the steam compression refrigerator 6, an ice slurry pump 11,
The de-icing water pump 12 and the heat exchanger 13 for cooling and cooling, and the connecting pipe connecting them are filled with tap water as makeup water 19. An antifreeze 14 having a predetermined concentration is added to the circulating water 7. The antifreeze 14 is a solution of sodium chloride or glycols, and is made of ethylene glycol or the like. As the antifreeze 14, propylene glycol, dihydric alcohol, propanediol, or the like may be applied in addition to ethylene glycol.

Reference numeral 8 denotes an ice heat storage tank for storing the low-temperature ice slurry 6d taken out from the evaporator 6a via the ice slurry pump 11. The ice heat storage tank 8 includes a heat exchanger 1 for cooling and heating.
The ice melting water 8a is derived from 3 and the ice melting action of the low-temperature ice slurry is performed, so that ice and melting water, that is, cold water are mixed. The cold water is pumped to the heat exchanger 13 for cooling by the deicing water pump 12. The cooling heat exchanger 13 circulates cold water by a cold water pump 18 to a cooling load (not disclosed) or the like as a so-called heat extraction cycle.

Next, the operation of the ice slurry extracting system of the steam compression refrigerator using the antifreeze according to the first embodiment of the present invention will be described. As shown in FIG. 2, generally, in the case of an antifreeze in an aqueous solution, for example, ethylene glycol,
It has been found that increasing the concentration (g / L) lowers the freezing temperature of the aqueous solution, that is, the freezing point (° C.). First, before taking out the low-temperature ice slurry 6d from the evaporator 6a, the circulating water 7 contains an antifreeze solution 1 such as ethylene glycol.
4 to maintain the concentration of the antifreeze at about 50 (g / L). Here, the ice making temperature in the evaporator 6a of the steam compression refrigerator 6 is about -1.0 because the ethylene glycol is dissolved in the aqueous solution or the circulating water 7.
(° C.), and the stirring action of the stirrer 6e in the evaporator 6a prevents ice from forming between the ices, and the ice can be taken out from the evaporator 6a as an ice slurry 6d free of ice.
On the other hand, the water vapor evaporated in the evaporator 6a is condensed in the condenser 6c by the cooling action of the cooling water 10, and water corresponding to the amount is returned to the circulating water 7 as makeup water, that is, condensed water 9. Therefore, the quality of the returned condensed ice 9 is substantially close to that of distilled water, and the antifreeze 14 such as ethylene glycol, which is an impurity, remains in the circulating water 7. There is no change in the concentration (g / L). Then, as described above, according to the system of the first embodiment, by setting the concentration of the antifreeze in the circulating water 7 to 50 (g / L), the evaporator 6a receives -1.0 ( C), and the low temperature ice slurry 6d can be taken out. In FIG. 1, reference numeral 15 denotes a cooling water heat exchanger or a closed cooling tower, and the cooling water obtained by the condenser 6c.
(Condensed water) 10 is circulated by a cooling water pump 16 as a closed circuit. Reference numeral 17 denotes sewage, seawater, river water, industrial water, clean water, or the like, which is supplied to the heat exchanger for cooling water or the closed cooling tower 15.

Further, in order to remove the ice slurry 6d at a lower temperature from the evaporator 6a, the concentration of the antifreeze solution (g / g) is required.
L) may be increased to lower the ice making temperature, that is, the freezing point.

[0019]

Second Embodiment FIG. 3 shows a second embodiment according to the present invention, and is a configuration layout diagram of an ice slurry and a low-temperature ice removal system of a steam compression refrigerator using an antifreeze.

The second embodiment is characterized in that an ice concentrator is incorporated in the configuration of the first embodiment, and low-temperature ice slurry is extracted from the evaporator and low-temperature ice is extracted from the ice concentrator. Reference numeral 21 denotes an ice concentrator. An ice slurry 6d containing, for example, about 15% by volume of ice and generated by an evaporator 6a in the steam compression refrigerator 6 is introduced by an ice slurry pump 11. The ice concentrator 21 separates the ice slurry 6d into ice and water by the buoyancy of the ice, that is, separates it into solid and liquid, thereby producing, for example, concentrated ice 22 containing about 80% by weight of ice. Further, the concentrated ice 22 is taken out and supplied to the ice heat storage tank 8, and the thawed water is guided to the circulating water 7 by the makeup water pump 23 and sent to the evaporator 6a. In addition, the ice concentrator 21, the evaporator 6a of the steam compression refrigerator 6, the ice slurry pump 11, the ice melting water pump 12, the heat exchanger 13 for cooling and cooling, the ice heat storage tank 8, and the connecting pipe connecting these Tap water is filled as the circulating water 7 and the makeup water 19. An antifreeze 14 having a predetermined concentration, such as ethylene glycol, is added to the circulating water 7 to ensure a necessary concentration of the antifreeze in the circulating water 7. The water that has been thawed by the make-up water pump 23 from the ice heat storage tank 8 is supplied to the circulating water 7 as make-up water.

The other configuration of the second embodiment of the present invention is substantially the same as that of the first embodiment, and the description thereof is omitted.

Next, the operation of the ice slurry and low-temperature ice removal system of the steam compression refrigerator using the antifreeze according to the second embodiment of the present invention will be described. Low-temperature ice slurry 6d from the evaporator 6a of the steam compression refrigerator 6
The operation of taking out is substantially the same as the operation of the first embodiment, and the description thereof is omitted. Therefore, an antifreeze 14 such as ethylene glycol is added to the circulating water 7.
According to the system of the second embodiment, the concentration of the antifreeze is set to 5
0 (g / L), from the evaporator 6a to -1.
0 (° C.) low temperature ice slurry is taken out and the evaporator 6a
The low-temperature ice slurry 6d generated in the above is once sent to the ice concentrator 21, where the solid and liquid separation of ice and water is performed. Thus, the ice concentrator 21 has a low temperature of about-
The concentrated ice 22 of 1.0 (° C.) is stored. Then, unprecedented low-temperature ice can be taken out from the ice concentrator 21. Then, in order to take out the concentrated ice 22 at a lower temperature from the ice concentrator 21, the concentration of the antifreeze liquid (g /
L) may be increased to lower the ice making temperature, that is, the freezing point of the circulating water 7.

[0023]

Third Embodiment FIG. 4 shows a third embodiment according to the present invention, and is a configuration layout diagram of an ice slurry, a low-temperature ice, and an artificial snow removal system of a steam compression refrigerator using an antifreeze. is there.

In the third embodiment, a snow making machine is incorporated in the structure of the second embodiment, and low-temperature ice slurry is produced from the evaporator, low-temperature ice is produced from the ice concentrator, and artificial snow is produced by the snow making machine. And it is characterized by taking out.
Reference numeral 25 denotes a snow making machine, which is constituted by, for example, a rotary feeder. The low-temperature concentrated ice 22 generated by the ice concentrator 21 is taken out, and the artificial snow 25a in the form of spray is generated based on the concentrated ice 22 by the snow making machine 25 connected to the ice concentrator 21.

The other configuration of the third embodiment of the present invention is substantially the same as that of the second embodiment, and a description thereof will be omitted.

Next, the operation of the ice slurry and low-temperature ice and the artificial snow removal system of the steam compression refrigerator using the antifreeze according to the third embodiment of the present invention will be described. The operation of extracting the low-temperature ice slurry 6d from the evaporator 6a of the steam compression refrigerator 6 and the operation of extracting the low-temperature ice from the ice concentrator 21 are substantially the same as the operations of the first and second embodiments of the present invention. Therefore, the description is omitted.

Therefore, an antifreeze 14 such as ethylene glycol is added to the circulating water 7, and the concentration of the antifreeze (g / g) is added.
If L) is considerably increased, for example, to about 150 (g / L), very low-temperature concentrated ice 22 of about -5 (° C.) can be obtained in the ice concentrator 21. The concentrated ice (low-temperature ice) 22 having a low temperature of -5 (° C.) is taken out from the upper part of the ice concentrator 21 and transported to the snow making machine 25, and the snow making machine 25 is driven and sprayed. An artificial snow 25a having a low temperature of -5 (° C.) is generated and taken out. The artificial snow 2
5a is taken out, transported to a ski resort or the like, and used at the ski resort. Further, the ice concentrate 22 of lower temperature is taken out from the ice concentrator 21 and the artificial snow 25a of lower temperature is taken out.
Is generated by increasing the antifreeze concentration (g / L) and lowering the ice-making temperature, that is, the freezing point of the circulating water 7.

In the above description, in the invention according to the third embodiment, the low-temperature ice slurry 6d, the low-temperature ice 22, and the artificial snow 25a are combined together with the evaporator 6a, the ice concentrator 21, and the snow making machine. 25, the extraction technique has been described. However, the present invention is not limited thereto.
(Concentrated water) 22 or a technique for removing one of the artificial snow 25a may be used. In this case, the concentration of the antifreeze may be appropriately changed depending on the temperature condition of the low-temperature ice slurry 6d or the like. It is also possible to reduce or change the arrangement components as needed.

[0029]

The ice slurry, low-temperature ice, and artificial snow removal system of the steam compression refrigerator using an antifreeze according to the present invention have the above-described configuration and operation, and therefore have the following effects.

According to the first aspect of the present invention, a condenser having a cooling water closed circuit formed through an evaporator, a compressor, and a heat exchanger for guiding circulating water from an ice heat storage tank, and a condenser formed by the condenser. In a steam compression refrigerator comprising a circuit for returning water to circulating water, an antifreeze having a predetermined concentration is added to the circulating water, and a low-temperature ice slurry is taken out from the evaporator. Provided is an ice slurry removal system for a steam compression refrigerator. With such a configuration, the freezing point of the circulating water is lowered, and the volume ratio of the desired low-temperature ice of -0.1 (° C) to -10 (° C) from the evaporator is 0.5% to It is a general-purpose antifreeze such as ethylene glycol that can take out about 50% of an ice slurry and is added to the circulating water as an impurity, and is very easy to implement.

According to the second aspect of the present invention, an ice heat storage tank, an ice concentrator for guiding ice to the ice heat storage, an evaporator for guiding circulating water from the ice concentrator, a compressor, and a heat exchanger. In a steam compression refrigerator having a condenser that forms a cooling water closed circuit and a circuit that returns condensed water generated by the condenser to circulating water, an antifreeze having a predetermined concentration is added to the circulating water, An ice slurry and a low-temperature ice removal system for a steam compression refrigerator using an antifreeze, wherein low-temperature ice is removed from the evaporator and low-temperature ice is generated in the ice concentrator. With such a configuration,
The freezing point of the circulating water is lowered and the cold ice slurry from the evaporator and the desired ice e.g.
It is a general-purpose antifreeze such as ethylene glycol added as impurities to circulating water, and can provide a system that can take out low-temperature ice of (° C) to −10 (° C) and is extremely easy to implement. is there.

According to the third aspect of the present invention, an ice concentrator, a snow making machine that guides low-temperature ice from the ice concentrator, an evaporator, a compressor, and a heat exchanger that guides circulating water from the ice concentrator An antifreeze having a predetermined concentration is added to the circulating water in the condenser having a cooling water closed circuit formed therein and a circuit for returning the condensed water generated in the condenser to the circulating water. Removing a low-temperature ice slurry from the evaporator, generating low-temperature ice in the ice concentrator, and generating artificial snow in the snow making machine; A slurry and cold ice and artificial snow removal system is provided. With such a configuration, the freezing point of the circulating water is lowered, and for example, a low-temperature ice slurry of -0.1 (° C) to -10 (° C) and -0.1 ( C) to -10 (C), and extremely low temperature and pure water artificial snow from a snow making machine to take out an effective ski area even in a season with a high outside air temperature. . In addition to providing a system for removing any one of these low-temperature ice slurries, low-temperature ice and artificial snow, there is an effect of preventing environmental harmful effects without spraying a cryogen such as calcium chloride.

According to a fourth aspect of the present invention, the snow making machine comprises a rotary feeder or the like. Provide a retrieval system. With such a configuration, there is an effect that artificial snow can be easily generated by a snow making machine such as a rotary feeder.

According to the fifth aspect of the present invention, the antifreeze having the predetermined concentration is a sodium chloride solution or a glycol solution, and is made of propylene glycol, ethylene glycol, dihydric alcohol or propanediol. An ice slurry, a low-temperature ice, and an artificial snow removal system for a steam compression refrigerator using the antifreeze according to claim 1, 2 or 3. With such a configuration, general-purpose sodium chloride, propylene glycol, ethylene glycol, dihydric alcohol, propanediol, or the like is used as the antifreeze, and the present invention has an effect of easily implementing the present invention.

According to the sixth aspect of the present invention, the evaporator is provided with a stirrer.
An ice slurry, a low-temperature ice, and an artificial snow removal system for a steam compression refrigerator using the antifreeze described above. With such a configuration, the inside of the evaporator can be agitated by the stirrer, ice formation between the ices can be prevented, and low-temperature ice slurry can be easily taken out from the evaporator.

According to a seventh aspect of the present invention, the heat exchanger is a heat exchanger for cooling water or a closed cooling tower, and the steam compression using an antifreeze solution according to the first, second or third aspect of the present invention. An ice slurry and low-temperature ice for a refrigerator and an artificial snow removal system are provided. With such a configuration, there is an effect that the cooling water obtained by the condenser can be circulated as a closed circuit and used as makeup water.

[Brief description of the drawings]

FIG. 1 is an arrangement configuration diagram of a system according to a first embodiment of the present invention.

FIG. 2 is a characteristic chart showing a freezing point drop (° C.) with respect to an antifreeze solution (g / L) in an aqueous solution in the system according to the present invention.

FIG. 3 is an arrangement configuration diagram of a system according to a second embodiment of the present invention.

FIG. 4 is an arrangement configuration diagram of a system according to a third embodiment of the present invention.

FIG. 5 is a basic configuration diagram showing an example of an ice making technique using a steam compression refrigerator in a conventional technique.

[Explanation of symbols]

 1, 6 steam compression refrigerator 2 circulating water 2a makeup water 3 ice concentrator 4 concentrated ice 5 ice slurry 6a evaporator 6b compressor 6c condenser 6d low temperature ice slurry 6e stirrer 7 circulating water 8 ice storage tank 8a ice melting water 9 Condensed water 10 Cooling water 11 Ice slurry pump 12 Defrosting water pump 13 Heat exchanger for cooling and heating 14 Antifreeze 15 Heat exchanger for cooling water or closed cooling tower 16 Cooling water pump 17 Sewage, seawater, river water, industrial water or clean water 18 Cold water pump 19 Makeup water 21 Ice concentrator 22 Low temperature ice (concentrated ice) 23 Makeup water pump 25 Snow making machine 25a Artificial snow

Claims (7)

[The claims] 1. A condenser having a cooling water closed circuit formed through an evaporator, a compressor, and a heat exchanger for guiding circulating water from an ice heat storage tank, and a circuit for returning condensed water generated by the condenser to the circulating water. An ice slurry for a steam compression refrigerator using an antifreeze, wherein an antifreeze having a predetermined concentration is added to the circulating water, and a low-temperature ice slurry is removed from the evaporator. Retrieval system. 2. An ice heat storage tank, an ice concentrator for guiding ice to the ice heat storage tank, and a cooling water closed circuit formed through an evaporator, a compressor, and a heat exchanger for guiding circulating water from the ice concentrator. In the steam compression refrigerating machine constituted by the condenser and the circuit for returning the condensed water generated by the condenser to the circulating water, an antifreeze having a predetermined concentration is added to the circulating water, and low-temperature ice An ice slurry and a low-temperature ice removing system for a steam compression refrigerator using an antifreeze, wherein the slurry is removed and low-temperature ice is generated in the ice concentrator. 3. An ice concentrator, a snow making machine for introducing low-temperature ice from the ice concentrator, and a cooling water closing circuit via an evaporator, a compressor and a heat exchanger for introducing circulating water from the ice concentrator. In a steam compression refrigerator including a formed condenser and a circuit for returning condensed water generated by the condenser to circulating water, an antifreeze having a predetermined concentration is added to the circulating water, and a low-temperature Removing an ice slurry, generating low-temperature ice in the ice concentrator, and generating artificial snow in the snow making machine; removing an ice slurry, low-temperature ice, and artificial snow from a steam compression refrigerator using antifreeze system. 4. The system according to claim 3, wherein said snow making machine comprises a rotary feeder or the like. 5. The antifreeze having the predetermined concentration is a sodium chloride solution or a glycol solution, and is made of propylene glycol, ethylene glycol, dihydric alcohol or propanediol. Of ice slurry, low-temperature ice and artificial snow for a steam compression refrigerator using the antifreeze of the present invention. 6. The system according to claim 1, wherein the evaporator includes a stirrer, and wherein the ice slurry, the low-temperature ice and the artificial snow are removed from the steam compression refrigerator using the antifreeze. 7. The ice slurry and low-temperature ice for a steam compression refrigerator using an antifreeze according to claim 1, wherein the heat exchanger is a heat exchanger for cooling water or a closed cooling tower. And artificial snow removal system.