JPH1047823A - Ice making method and ice heat storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the maintenance and control of water quality with high resistance to the dirt of water and form ice with high charging rate. SOLUTION: An ice heat storage device comprises an ice making tank 1 having a storing part 10 with water stored therein for storing nonaqueous antifreezing solution having a specific gravity higher than water and a freezing point below an ice point on its bottom part, an antifreezing solution recovery port for recovering the antifreezing solution 4 stored in the refrigerant storing part and an antifreezing solution injection port for injecting the antifreezing solution from an outside part on its bottom surface, a pump 8 for pressing the antifreezing solution recovered from the antifreezing solution recovery port, a refrigerating machine 9 for cooling the antifreezing solution pressed by the pump and a plurality of nozzles 7 provided on the bottom part of the ice making tank 1 for injecting the antifreezing solution entering through the antifreezing solution injection port and cooled to temperature below the ice point by the refrigerating machine toward water from the antifreezing solution of the refrigerant storing part and generating foamy droplets on the interface of water and antifreezing solution to form ice on the films of the droplets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice heat storage device, and more particularly to a method for producing ice in the form of sherbet using low-cost electricity at night and a high ice filling rate of the ice produced by the method. The present invention relates to an ice heat storage device designed to be (IPF).

[0002]

2. Description of the Related Art In recent years, in a relatively large-scale air-conditioning system in an industrial plant, a building, or the like, an example in which a thermal storage air-conditioning system using low-cost nighttime power is often introduced. This contributes to the stable supply of power by reducing the power demand during the peak air conditioning load in the daytime and increasing the power demand during the off-peak hours at night, thereby achieving economical operation of power equipment. is there.

[0003] Further, the economical operation of the electric power equipment can meet the social demands for suppressing the generation of carbon dioxide gas and protecting the environment. By the way, in this type of heat storage space system, an ice heat storage device which is excellent in safety and economic efficiency for cooling load in summer has been attracting attention. There are two methods for producing ice in the ice heat storage device, an indirect heat exchange method (static method) and a direct heat exchange method (dynamic method).

[0004] In the static method, a heat transfer tube for ice making is provided in an ice heat storage layer, and a low-temperature refrigerant is circulated inside or outside the heat transfer tube to generate ice outside or inside the heat transfer tube. It is. In this static method, when ice is generated in the heat transfer tube using an antifreeze such as ethylene glycol or freon as the refrigerant, the heat transfer coefficient of the ice itself decreases with an increase in the thickness of the ice. Heat transfer to ice is reduced. For this reason, there is a disadvantage that the efficiency of a refrigerator that lowers the temperature of the refrigerant and cools the refrigerant is reduced.

In order to avoid this drawback, a large number of transfer tubes are arranged in the ice thermal storage layer to reduce the thickness of the ice and improve the efficiency of the refrigerator. Will decrease. On the other hand, at the time of thawing, unevenness of melting of the iced ice occurs, and there is a portion that does not completely melt. And
When icing on the heat transfer tube again, the icing starts from the remaining icing part, so the thick part becomes even thicker, and eventually the ice comes into contact with ice and the heat transfer tube may be bent or damaged There is.

On the other hand, as a dynamic system, there is a fluid supercooling system and the like. However, this system has a problem in water purification, and a large amount of water must be constantly purified, which hinders an increase in size. In addition, the temperature of the water temperature discharged during ice making is quite strict, and this temperature greatly depends on the state of ice formation, which complicates the apparatus.

[0007]

As described above, since the conventional thermal storage air conditioning system is intended for the cooling load in the summer, it may be necessary to release the cold stored at the peak of the air conditioning load during the daytime. It is necessary to make ice in large quantities at high speed and at a low cost at night and store ice at high density.

[0008] However, in the static ice making method of the indirect heat exchange method having a high density, it takes time, and the narrow space due to the piping in the ice making layer leads to a decrease in the ice filling rate.

Further, in the dynamic ice making method capable of producing ice in a sherbet state, continuous ice making cannot be performed unless very high-level control is used as the ice making method. Therefore, the establishment of a stable ice making method has become an important issue for practical use as an ice heat storage device.

For example, in a fluidized subcooling system, since it is required to maintain a constant water quality, it takes a great deal of time and energy to purify water dirt. Therefore, it is quite impossible to purify all water in a short time, which is not suitable for heat supply in a large area.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a method for manufacturing ice which is resistant to water contamination and can reduce the maintenance of water quality, and a high filling rate of ice produced by the method. It is an object of the present invention to provide an ice heat storage device that has been developed.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention solves the above-mentioned problems by the following method for producing ice and an ice heat storage device using this method. The invention corresponding to claim 1 is an ice-making tank in which water is stored inside, and a refrigerant storage portion is formed at the bottom where a refrigerant storage portion for storing an antifreeze having a specific gravity greater than water and having a freezing point at a temperature lower than the freezing point is insoluble and lower than the freezing point. The antifreeze liquid pressurized by the pump from the bottom of the refrigerant reservoir is cooled by a refrigerator and ejected, and the antifreeze ejected to the refrigerant reservoir from the bottom of the refrigerant reservoir is maintained at a temperature lower than the freezing point and into the water from the refrigerant. When squirting toward the surface, a bubble-like droplet is generated at the interface between the antifreeze and the water, so that ice is generated in a thin film of the droplet, and the droplet collapses or is absorbed by the antifreeze at the interface. Ice is continuously generated while exchanging heat with water due to the release of cold stored in the droplets.

Therefore, in the ice manufacturing method according to the present invention, the cooled refrigerant is blown up toward the refrigerant in the storage unit 10 to form droplets at the interface with the water. Ice is generated on the surface of the droplets by the cold heat of the droplets and the cold heat in the droplets in the reservoir, and the droplets are automatically separated from the droplets by the collapse of the droplets, and only the ice floats. Is very good, and the efficiency of ice production can be increased.

According to a second aspect of the present invention, water is stored inside, and a refrigerant storage portion is formed at the bottom for storing an antifreeze having a specific gravity larger than water, being insoluble in water, and having a freezing point at a temperature below freezing. And an ice-making tank provided with an antifreeze liquid recovery port for recovering the antifreeze stored in the refrigerant storage section to the outside and an antifreeze ejection hole for ejecting the antifreeze from the outside, and the antifreeze liquid recovery port provided on the bottom of the ice-making tank. A pump for pressurizing the antifreeze solution, a refrigerator for cooling the antifreeze solution pressurized by the pump, and an antifreeze solution cooled to below freezing by the refrigerator that flows through the antifreeze jet hole of the ice making tank. A nozzle that spouts out of the antifreeze liquid into the water to generate foamy droplets at the interface between the water and the antifreeze liquid, thereby generating ice in a thin film of the droplets. Comprising ice making apparatus of the cold stored in the droplets are emitted on the interface to the water and heat exchanger when the droplets are absorbed into the antifreeze of disintegration or surfactant.

Therefore, in the ice heat storage device according to the second aspect of the present invention, the antifreeze liquid stored at the bottom of the ice making tank is recovered from the refrigerant recovery port by the refrigerant transport pump and pressurized, and further cooled to below freezing by the refrigerator. The antifreeze, which has been cooled and cooled to below freezing by the freezer flowing through the antifreeze outlet of the ice making tank, is jetted out of the antifreeze in the refrigerant reservoir from the refrigerant jet nozzle into the water, and is generated at the interface between the water and the antifreeze. Since the heat exchange with water is performed by the release of the cold stored in the falling droplets to generate ice, ice can be generated efficiently.

According to a third aspect of the present invention, there is provided a refrigerant storing portion for storing water therein, and for storing an antifreeze having a specific gravity larger than that of water, a water-insoluble property, and a freezing point having a temperature below freezing below the freezing point. And an ice-making tank provided with an antifreeze liquid recovery port for recovering the antifreeze stored in the refrigerant storage section to the outside and an antifreeze ejection hole for ejecting the antifreeze from the outside, and the antifreeze liquid recovery port provided on the bottom of the ice-making tank. A pump for pressurizing the antifreeze liquid, a refrigerator for cooling the antifreeze liquid pressurized by the pump, and a refrigerator installed at the bottom of the ice making tank and flowing through the antifreeze ejection hole and cooled to below freezing. A buffer tank for storing antifreeze, and the antifreeze stored in the buffer tank is jetted out of the antifreeze in the refrigerant reservoir toward the water. And a plurality of nozzles that generate ice on the thin film of the droplet by generating a bubble-like droplet at the interface between the water and the antifreeze, and the droplet collapses or is absorbed by the antifreeze at the interface. An ice making device that exchanges heat with water by releasing cold stored in the liquid droplets onto the interface when the liquid drops.

Therefore, in the ice heat storage device according to the third aspect of the present invention, the antifreeze liquid stored at the bottom of the ice making tank is recovered from the refrigerant recovery port by the refrigerant transport pump and pressurized, and further cooled to below freezing by the refrigerator. Cooled and stored in a buffer tank arranged at the bottom of the ice making tank, and a plurality of refrigerant jet nozzles provided on the upper surface of the buffer tank are jetted into the water from the antifreeze in the refrigerant storage section toward the water. Ice is generated by exchanging heat with water due to the release of cold stored in droplets generated at the interface between the ice and the antifreeze, and ice can be generated efficiently. In particular, since the antifreeze in the buffer tank is in a pressurized state, since the antifreeze is ejected from a plurality of refrigerant ejection nozzles simultaneously,
The amount of generated droplets also increases, heat exchange is performed in a wider range, and ice making efficiency is improved.

According to a fourth aspect of the present invention, there is provided the ice heat storage device according to the second or third aspect of the present invention, wherein an antifreeze is provided on the inner peripheral surface of the ice making tank near the interface between the antifreeze and the water in the refrigerant storage section. Place a heating device.

According to a fifth aspect of the present invention, in the ice heat storage device according to the fourth aspect, the anti-freezing heating device floats near the interface between the antifreeze and the water in the refrigerant storage section.

Therefore, in the ice heat storage device according to the fourth and fifth aspects of the present invention, a heating device for preventing freezing is provided on the inner peripheral surface of the lower part of the ice making tank near the interface between the antifreeze and the water in the storage portion. This freezing-prevention heating device is arranged on the interface between the antifreeze and water, and the position of the interface is always maintained. Therefore, even if the interface changes, the freezing of the wall surface can be prevented, and stable ice making can be achieved. Can be maintained.

According to a sixth aspect of the present invention, in the ice heat storage device according to the second or third aspect, the ice making tank is formed in a cylindrical shape, and the circulating water flowing down on the inner peripheral surface thereof is swirled. Is provided.

According to a seventh aspect of the present invention, in the ice heat storage device according to the second or third aspect, an inverted funnel-shaped ice collecting section for collecting ice generated above a buffer tank in an ice making tank. And a fin for forming an upward swirling flow for transporting ice water is provided on the inner peripheral surface of the ice collecting portion.

Therefore, in the ice heat storage device of the invention corresponding to claims 6 and 7, since the spiral fins are provided on the inner peripheral surface of the ice making tank, the ice is supplied from the upper part of the ice making tank. The formed water flows into the ice collecting part by forming a swirling descending flow by spiral fins provided on the inner peripheral surface of the ice making tank,
The generated ice blocks do not move to the outer periphery of the ice collecting part,
Ice water can be transported efficiently with a high ice collection rate.

According to an eighth aspect of the present invention, in the ice heat storage device according to the second or third aspect, the plurality of nozzles provided on the upper surface of the buffer tank have an antifreeze ejection hole in a central portion, The surrounding area is configured as a heat insulating layer.

According to a ninth aspect of the present invention, in the ice heat storage device according to the second or third aspect, the plurality of nozzles provided on the upper surface of the buffer tank have blunt tips. An antifreeze ejection hole is provided at the center, and the surrounding area is configured as a heat insulating layer.

According to a tenth aspect of the present invention, in the ice heat storage device according to the second or third aspect, the plurality of nozzles provided on the upper surface of the buffer tank are formed such that the upper part of the tube has a spherical ejection portion. This spherical part incorporates a heater.

Therefore, in the ice heat storage device of the invention according to claims 8 to 10, it is possible to prevent freezing of the nozzle tip and to control the temperature at which the antifreeze is ejected.

According to an eleventh aspect of the present invention, water is stored inside, and a refrigerant storage portion is formed at the bottom portion for storing an antifreeze having a specific gravity larger than water, being insoluble in water, and having a freezing point at a temperature below freezing, and And an ice-making tank provided with an antifreeze liquid recovery port for recovering the antifreeze stored in the refrigerant storage section to the outside and an antifreeze ejection hole for ejecting the antifreeze from the outside, and the antifreeze liquid recovery port provided on the bottom of the ice-making tank. A pump for pressurizing the antifreeze solution, a refrigerator for cooling the antifreeze solution pressurized by the pump, and an antifreeze solution cooled to below freezing by the refrigerator that flows through the antifreeze jet hole of the ice making tank. A nozzle that spouts into the water from the antifreeze to generate foamy droplets at the interface between the water and the antifreeze, thereby generating ice in a thin film of the droplets, A plurality of ice-making units are installed side-by-side or vertically in multiple stages to exchange heat with water by releasing cold stored in the droplets onto the interface when the droplets collapse or are absorbed by the antifreeze at the interface Then, the pump and the refrigerator are commonly connected to each ice making device to form an antifreeze circulation system.

According to a twelfth aspect of the present invention, water is stored inside, and a refrigerant storage part is formed at the bottom for storing an antifreeze having a specific gravity larger than water, being insoluble in water, and having a freezing point at a temperature below freezing, and And an ice-making tank provided with an antifreeze liquid recovery port for recovering the antifreeze stored in the refrigerant storage section to the outside and an antifreeze ejection hole for ejecting the antifreeze from the outside, and the antifreeze liquid recovery port provided on the bottom of the ice-making tank. A pump for pressurizing the antifreeze liquid, a refrigerator for cooling the antifreeze liquid pressurized by the pump, and a refrigerator installed at the bottom of the ice making tank and flowing through the antifreeze ejection hole and cooled to below freezing. A buffer tank for storing antifreeze, and the antifreeze stored in the buffer tank is sprayed from the antifreeze in the refrigerant reservoir toward the water. A plurality of nozzles that generate ice on the thin film of the droplets by generating foamy droplets at the interface between the water and the antifreeze, and the droplets collapse or are absorbed by the antifreeze at the interface. When a plurality of ice making devices that exchange heat with water by discharging the cold stored in the droplets to the interface when the liquid is stored are arranged side by side or in multiple stages in the vertical direction, the pump and the refrigerator are installed in each ice making device. Commonly connected to form an antifreeze circulating system.

Therefore, in the ice heat storage device of the invention corresponding to claim 11 and claim 12, a plurality of ice making devices are arranged side by side when the installation area of the device is large, and when the installation area of the device is small. By arranging a plurality of ice making devices in multiple stages in the vertical direction, it is possible to exhibit the ability from full operation for large capacity to small capacity ice making operation of additional operation.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of an ice heat storage device according to the present invention. In FIG. 1, 1
Is a cylindrical ice-making tank having openings at both ends thereof closed, and spiral fins 2 are provided on the inner peripheral surface of the ice-making tank 1 at appropriate intervals.
And an antifreeze liquid (hereinafter referred to as refrigerant) 4 made of, for example, Fluorinert, having a specific gravity greater than that of water 3, a water-insoluble property, and a freezing point lower than freezing point and lower than freezing point
And a refrigerant recovery groove 5 for recovering the refrigerant.

A buffer tank 6 composed of a single cylinder for housing the refrigerant in a pressurized state is installed inside the refrigerant recovery groove 5. The buffer tank 6 is provided with a plurality of refrigerant jet nozzles 7 for jetting the refrigerant upward on the upper surface thereof.

As shown in FIG. 2, the coolant ejection nozzle 7 has a blunt body-shaped nozzle 21 having a coolant ejection hole at the center.
A heat insulating layer 22 made of, for example, Teflon, having a heat insulating effect, is provided around the coolant ejection holes.

Further, between the buffer tank 6 and the refrigerant recovery groove 5, the refrigerant 4 stored in the refrigerant recovery groove 5 is discharged from the refrigerant recovery port, pressurized by the refrigerant transport pump 8, and is cooled by the refrigerator 9. Then, a refrigerant circulating system that flows into the buffer tank 6 again is configured.

A buffer tank 6 is provided below the ice making tank 1.
A storage part 10 for storing the refrigerant 4 ejected from the refrigerant ejection nozzle 7 is formed, and a ring-shaped antifreezing heating device is provided on the inner peripheral side of the ice making tank 1 corresponding to the vicinity of the interface between the storage part 10 and the water 3. 11 is provided so as to float above the interface.

Further, a spiral fin 12 is provided on the inner peripheral surface above the storage portion 10 in the ice making tank 1, and ice 13 generated by the refrigerant 4 ejected from the refrigerant ejection nozzle 7 of the buffer tank 6. An ice collecting section 14 having an inverted funnel shape for collecting ice is provided, and an ice water transport pipe 1 vertically penetrated into the inside of the ice making tank 1 through an upper end opening of the ice collecting section 14 through the upper surface of the ice making tank 1.
5 is connected to one end.

Here, the ice making tank 1, the buffer tank 6, the storage unit 10, and the ice collecting unit 14 constitute an ice making device. On the other hand, an ice storage tank 16 is provided separately from the ice making tank 1.
The other end is connected to store ice transported through the ice water transport pipe 15.

Further, an ice water transfer pump 17 is connected to a discharge port provided at a lower portion of the ice storage tank 1.
The water conveyed by 7 can be supplied through a water conveyance pipe 19 connected to a circulating water supply hole 18 provided in the upper part of the ice making tank 1.

Next, the operation of the ice heat storage device configured as described above will be described. Now, when the refrigerant transport pump 8 is driven, the refrigerant 4 stored in the refrigerant recovery groove 5 provided at the bottom of the ice making tank 1 flows out from the refrigerant recovery port, and the refrigerant 4 is
Then, the mixture is cooled to 0 ° C. or lower by the refrigerator 9 and introduced into the buffer tank 6.

The refrigerant 4 stored in the buffer tank 6 is jetted into the water by the internal pressure through the refrigerant 4 stored in the storage section 10 above the refrigerant jet nozzle 7, and at this time, the following phenomenon occurs. Is generated.

FIGS. 6 to 8 are views for explaining processes and phenomena until ice is formed. That is, as shown in FIG. 6, the refrigerant 4 cooled to 0 ° C. or less
By spraying up from the refrigerant stored in 0, the storage unit 10 is cooled, and a droplet group 20 (refrigerant and water) is generated at the interface between the refrigerant and water. Then, when the droplet group 20 collapses or is absorbed by the coolant at the interface, the cold stored in the droplets is released at this time, and heat exchange is performed with water. At this time, when the water temperature and the temperature of the storage portion of the refrigerant become 0 ° C. or less, ice formation starts.

In this case, as shown in FIG. 7, ice is generated on the interface between water and the refrigerant, and is generated as a thin film of droplets (refrigerant, water) storing cold heat. Then, as shown in FIG.
The ice 13 floats when the water collapses and is absorbed by the storage unit 10. That is, when the droplet group of the refrigerant 4 is absorbed by the storage unit 10, ice 13 is generated from the vicinity of the interface between the water 3 and the refrigerant 4 by repeating heat dissipation and collapse.

In such a phenomenon, no droplet is generated unless the refrigerant is blown up above the interface, and cold is applied to the refrigerant, and ice is not generated unless the droplet contains cold. Further, ice is not generated unless the reservoir is cooled below 0 ° C. Clearing these conditions will enable ice production for the first time.

Here, a specific example of the temperature of the storage unit 10 and the result of ice formation will be described. The temperature of the refrigerant storage unit 10 is 0 ° C.
From 1 ° C to -1 ° C, round disc-shaped ice of about 1 mm of primary ice is generated, and from -1 ° C to -2 ° C, leaf-like ice of about 2 mm is generated. At this time, the nozzle ejection temperature is 0 ° C. or less, and the flow rate differs depending on the nozzle diameter. In this case, the limit of the flow rate of the discharged refrigerant is such that the refrigerant is not suspended in water.

For example, an appropriate flow rate of a refrigerant called Fluorinert, whose specific gravity is 1.8 times that of water, is φ8 mm and length 5 mm
0mm Teflon nozzle from nozzle tip to interface 3
Under the condition of 0 mm to 40 mm, about 100 mm to 150 mm is suitable as the jetting height, and can generate droplets (bubbles) more effectively on the interface. By the way, no sherbet-like ice is generated except for the droplets (bubbles).

On the other hand, the coolant 4 ejected from the coolant ejection nozzle 7 moves to the wall surface of the ice making tank 1 while forming a group of droplets 20 at the interface with the water 3 and induces freezing of the wall surface.
The freezing is prevented by a heating device 11 for preventing freezing, which is arranged near the interface with the substrate.

After the ice 13 is generated in this manner, the storage unit 1
The refrigerant 4 recovered to 0 is supplied to the ice making unit while circulating in the refrigerant circulation system returning to the buffer tank 6 via the refrigerant conveyance pump 8 and the refrigerator 9 from the refrigerant recovery groove 5 again.

At this time, the water 3 is supplied from the ice storage tank 16 into the ice making tank 1 through the circulating water supply hole 18 provided in the upper part thereof by the driving of the ice water transfer pump 17. The water 3 supplied from the circulating water supply hole 18 forms a swirling downward flow by the spiral fins 2 provided on the inner peripheral surface of the ice making tank 1 and is guided into the inverted funnel-shaped ice collecting unit 14. .

The ice 13 generated in the ice making section is efficiently collected by the flow of water guided into the ice collecting section 14 and the spiral fins 12 provided on the inner peripheral surface of the ice collecting section 14. ,
The water is transferred to the ice storage tank 16 by the circulation operation of the ice water transfer pump 17.

As described above, in the first embodiment, the cooled refrigerant is blown up into the refrigerant in the storage unit 10 to form droplets at the interface with water, and the cooling heat of the storage unit and the water on the storage unit Ice is generated on the surface of the droplet due to the cold heat in the droplet, and the droplet is automatically separated from the droplet by the collapse of the droplet, and only the ice floats. Generation efficiency can be increased.

The refrigerant 4 stored in the refrigerant recovery groove 5 at the bottom of the ice maker 1 is recovered from the refrigerant recovery port by the refrigerant transport pump 8 and pressurized, and further cooled to below freezing by the refrigerator 9 to cool the ice maker 1. The refrigerant is stored in a buffer tank 6 disposed at the bottom, and the refrigerant 4 is jetted from a plurality of refrigerant jet nozzles 7 provided on the upper surface of the buffer tank 6 to form droplets at the interface between water and the refrigerant. Ice is generated on the surface of the droplet by the cold heat of the reservoir and the cold in the droplet on the reservoir, and the droplet is automatically separated from the droplet by the collapse of the droplet. Since it is generated, heat exchange is performed in a wider range, and ice can be generated efficiently.

In particular, a large amount of foam-like droplets are generated on the interface by ejecting the coolant toward the water from the interface between the coolant and the water by the coolant ejection nozzle 7, and this foam-like droplet containing cold heat is generated. Since the heat exchange between the refrigerant and water is performed by repeating generation and collapse, the ice making efficiency is improved by the number of droplets, and at the same time, continuous ice making becomes possible. can get.

On the other hand, a ring-shaped antifreezing heating device 1 is provided on the lower inner peripheral surface of the ice making tank 1 near the interface between the storage section 10 and the water 3.
1 is provided, and since the anti-freezing heating device 11 floats on the refrigerant and always maintains the interface position, even if the interface changes, it is possible to prevent wall surface freezing and maintain stable ice making. .

Since the spiral fins 2 are provided on the inner peripheral surface of the ice making tank 1, the water supplied from the circulating water supply hole 18 at the upper part of the ice making tank 1 is supplied to the inner peripheral surface of the ice making tank 1. Since the spiral fins 2 provided form a swirling downward flow and flow into the ice collecting unit 14, the generated ice blocks do not move to the outer periphery of the ice collecting unit 14, and ice water is collected at a high ice collecting rate. It can be efficiently transported to the ice storage tank 16.

Further, as described above, the buffer tank 6
The refrigerant ejection nozzle 7 for ejecting the refrigerant 4 stored in the nozzle has a blunt tip, and is provided with a heat insulating layer around the refrigerant ejection hole. The escape can prevent the tip of the nozzle from freezing.

FIG. 3 shows another example of the structure of the refrigerant jet nozzle 7 provided in the buffer tank 6. That is, as shown in FIG. 3, the refrigerant jet nozzle 7 is a spherical nozzle 24 having a spherical tip at the tip, and the heater 23 is incorporated in a spherical shape around the refrigerant jet hole provided at the center.

By providing the refrigerant ejection nozzle having such a configuration, the nozzle can be prevented from freezing, and the ejection temperature of the refrigerant 4 can be controlled. FIG. 4 is a sectional view showing a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the first embodiment, the case where one ice making device is provided has been described, but in the second embodiment, FIG.
A plurality of (three in the figure) ice making devices are installed side by side as shown in FIG.
And a water supply system 32 fed by an ice water transfer pump on the ice storage tank (not shown) is connected to the upper part of the wall opposite to the communication hole 31 of the ice making tank 1 on both sides, and is connected to the ice collecting part 14 of each ice making tank 1. An ice water transport system 33 that transports the collected ice to an ice storage tank (not shown) by connecting the ice water transport unit 15 in common is connected.

Further, between the buffer tank 6 and the refrigerant recovery groove 5 of each ice making tank 1, a single refrigerant transport pump 8 is used to share a discharge system for discharging the refrigerant 4 stored in the refrigerant recovery groove 5. Then, the refrigerant is frozen by the refrigerator 9, and flows again into the buffer tank 6 of each ice making tank 1 to form a refrigerant circulation system.

Accordingly, in the ice heat storage device having such a configuration, when a large number of ice making devices are provided in parallel according to the amount of ice making required when the installation area of the device is large, a full capacity for a large capacity is provided. A wide range of variable operation is possible from operation to additional operation of small ice making operation.

FIG. 5 is a sectional view showing a third embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. In the first embodiment, the case where one ice making device is provided has been described. However, in the third embodiment, a plurality of (two in the figure) ice making devices are installed vertically as shown in FIG. In the upper part of the wall of each ice making tank 1, a communication hole 41 is formed.
And a water supply system 42 fed from an ice storage tank (not shown) by an ice water transfer pump to the communication holes 41. The ice collected in the ice collection unit 14 of each ice making tank 1 is supplied to the ice water transfer unit 15. A transport system 43 that is commonly connected and transports to an ice storage tank (not shown) is connected.

Further, between the buffer tank 6 of each ice making tank 1 and the refrigerant recovery groove 5, a single refrigerant transport pump 8 is used to share a discharge system for discharging the refrigerant 4 stored in the refrigerant recovery groove 5. Then, the refrigerant is frozen by the refrigerator 9, and flows again into the buffer tank 6 of each ice making tank 1 to form a refrigerant circulation system.

Therefore, in the ice heat storage device having such a configuration, when the installation area of the device is small, the ice making tank is installed in a multi-stage system according to the amount of ice making, so that the full operation for a large capacity can be added. A wide range of variable operation is possible up to small ice making operation.

In each of the above embodiments,
Although the case where the buffer tank 6 is provided in the refrigerant storage section 10 of the ice making tank 1 has been described, a plurality of nozzles 7 are arranged in parallel with the refrigerant storage section 10 by communicating with the antifreeze liquid ejection holes of the ice making tank 1, and an external pump 8 is provided. The antifreeze liquid which has been pressurized and cooled below freezing by the refrigerator 9 is ejected from each nozzle 7 through the antifreeze liquid in the refrigerant reservoir toward the water to generate foam-like droplets at the interface between the water and the antifreeze liquid. Even if it does, the same operation and effect as described in each of the above embodiments can be obtained.

[0065]

As described above, according to the present invention, an ice manufacturing method which is resistant to water contamination, can reduce the maintenance and management of water quality, and can produce ice at a high filling rate in a water tank. And an ice heat storage device.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an ice heat storage device according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a refrigerant ejection nozzle provided in the buffer tank in the embodiment.

FIG. 3 is a sectional view showing another example of the configuration of the refrigerant ejection nozzle provided in the buffer tank.

FIG. 4 is a cross-sectional view showing a second embodiment of the ice heat storage device according to the present invention.

FIG. 5 is a cross-sectional view showing a third embodiment of the ice heat storage device according to the present invention.

FIG. 6 is a diagram showing a state in which an antifreeze liquid is blown up from a refrigerant reservoir onto an interface to generate droplets in the ice manufacturing method according to the present invention.

FIG. 7 is a view showing a state in which ice is generated in a thin film of a droplet generated at an interface in the ice manufacturing method.

FIG. 8 is a diagram showing a state in which droplets collapse and ice floats in the ice manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ice-making tank 2 ... Helical fin 3 ... Water 4 ... Antifreeze 5 ... Refrigerant recovery groove 6 ... Buffer tank 7 ... Refrigerant ejection nozzle 8 ... Refrigerant transport pump 9 ... Refrigerator 10 ... storage unit 11 ... anti-freezing heating device 12 ... spiral fins 13 ... ice 14 ... ice collecting unit 15 ... ice water transport pipe 16 ... ice storage tank 17 ... ice water transfer pump 18 ... circulation Water supply holes 19 Water transport pipes 20 Droplets 31 41 Communication holes 32 42 Water supply systems 33 43 Transport systems

Claims (12)

[Claims] 1. A refrigerant storage portion of an ice-making tank in which water is stored, and a refrigerant storage portion is formed at a bottom portion for storing an antifreeze having a specific gravity larger than water, a water-insoluble property, and a freezing point having a temperature below freezing. The antifreeze liquid pressurized by the pump from the bottom is cooled by a refrigerator and jetted out, and the antifreeze jetted from the bottom of the refrigerant storage section to the refrigerant storage section is jetted toward the water from inside the refrigerant while keeping the temperature below the freezing point. At that time,
By generating foamy droplets at the interface between the antifreeze and water, ice is formed in the thin film of the droplets, and when the droplets collapse or are absorbed by the antifreeze at the interface, the droplets form A method for producing ice continuously while exchanging heat with water by releasing cold stored in the ice. 2. A coolant storage portion for storing water therein, a coolant storage portion for storing an antifreeze having a specific gravity larger than water, a water-insoluble property and a freezing point at a temperature below freezing below the freezing point is formed at a bottom portion, and the coolant storage portion at a bottom surface. An ice making tank provided with an anti-freezing liquid collecting port for collecting the anti-freezing liquid stored outside and an anti-freezing liquid jetting hole for jetting the anti-freezing liquid from the outside, and a pump for pressurizing the anti-freezing liquid collected from the anti-freezing liquid collecting port provided on the bottom surface of the ice making tank. ,
A refrigerator for cooling the antifreeze liquid pressurized by the pump; and an antifreeze liquid cooled to below freezing by the refrigerator flowing through the antifreeze liquid outlet of the ice making tank, from the antifreeze liquid in the refrigerant reservoir toward water. A nozzle that generates ice on the thin film of the droplet by generating a bubble-like droplet at the interface between the water and the antifreeze, and when the droplet collapses or is absorbed by the antifreeze at the interface. An ice heat storage device, comprising: an ice making device that exchanges heat with water by releasing cold stored in droplets onto an interface. 3. A refrigerant storage portion for storing water therein, a refrigerant storage portion for storing an antifreeze having a specific gravity larger than water, a water-insoluble property, and a freezing point at a temperature below freezing below the freezing point is formed at a bottom portion, and the refrigerant storage portion on a bottom surface. An ice making tank provided with an anti-freezing liquid collecting port for collecting the anti-freezing liquid stored in the outside and an anti-freezing liquid jetting hole for jetting the anti-freezing liquid from the outside, and a pump for pressurizing the anti-freezing liquid collected from the anti-freezing liquid collecting port provided on the bottom surface of the ice making tank. ,
A refrigerator that cools the antifreeze liquid pressurized by the pump, a buffer tank that is installed at the bottom of the ice making tank, and stores the antifreeze liquid that has been cooled to below freezing by the refrigerator that flows in through the antifreeze liquid ejection hole, The antifreeze stored in the buffer tank is ejected toward the water from the antifreeze in the refrigerant reservoir to generate bubble-like droplets at the interface between the water and the antifreeze, thereby forming a droplet. A plurality of nozzles for generating ice on the thin film, wherein when the droplets collapse or are absorbed by the antifreeze at the interface, the cold stored in the droplets is released onto the interface to exchange heat with water. An ice heat storage device provided with an ice making device that performs the following. 4. The ice heat storage device according to claim 2, wherein a heating device for preventing freezing is disposed on an inner peripheral surface of the ice making tank near an interface between the antifreeze and the water in the refrigerant storage portion. Ice storage device. 5. The ice thermal storage device according to claim 4, wherein the anti-freezing thermal device floats near an interface between the antifreeze and the water in the refrigerant storage section. 6. The ice heat storage device according to claim 2, wherein the ice making tank is formed in a cylindrical shape, and spiral fins are provided on an inner peripheral surface of the ice making tank to give a swirling flow to circulating water flowing down. An ice heat storage device characterized by the above-mentioned. 7. The ice heat storage device according to claim 2, further comprising an inverted funnel-shaped ice collecting unit for collecting the generated ice above the buffer tank in the ice making tank. An ice heat storage device, wherein fins for forming an upward swirling flow for conveying ice water are provided on a peripheral surface. 8. The ice heat storage device according to claim 2, wherein the plurality of nozzles provided on the upper surface of the buffer tank have an antifreeze liquid ejection hole in a central portion, and a peripheral portion thereof is configured as a heat insulating layer. An ice heat storage device characterized by the above-mentioned. 9. The ice heat storage device according to claim 2, wherein the plurality of nozzles provided on the upper surface of the buffer tank have a blunt body at the tip, and have an antifreeze ejection hole at the center. An ice heat storage device comprising a heat insulating layer around the periphery. 10. The ice heat storage device according to claim 2, wherein the plurality of nozzles provided on the upper surface of the buffer tank are configured such that the upper part of the tube is a spherical ejection part, and the spherical part has a built-in heater. An ice heat storage device, characterized in that: 11. A coolant storage portion for storing water therein, a coolant storage portion for storing an antifreeze having a specific gravity larger than water, a water-insoluble property, and a freezing point at a temperature below freezing below the freezing point is formed at a bottom portion, and the coolant storage portion on a bottom surface. An ice making tank provided with an anti-freezing liquid collecting port for collecting the anti-freezing liquid stored outside and an anti-freezing liquid jetting hole for jetting the anti-freezing liquid from the outside, and a pump for pressurizing the anti-freezing liquid collected from the anti-freezing liquid collecting port provided on the bottom surface of the ice making tank. A refrigerator that cools the antifreeze liquid pressurized by the pump, and the antifreeze liquid cooled to below freezing by the refrigerator that flows through the antifreeze liquid ejection hole of the ice making tank from the antifreeze liquid in the refrigerant storage unit to the water. A nozzle that generates a bubble-like droplet at the interface between the water and the antifreeze by ejecting the droplet. A plurality of ice making devices that generate ice by exchanging heat with water when cold stored in the ice is released are installed side by side or in multiple stages in the vertical direction, and the pump and the refrigerator are connected in common to each ice making device to form an antifreeze. An ice heat storage device comprising a circulation system. 12. A coolant storage portion for storing water therein, a coolant storage portion for storing an antifreeze having a specific gravity larger than water, a water-insoluble property, and a freezing point at a temperature below freezing below the freezing point is formed at a bottom portion, and the coolant storage portion on a bottom surface. An ice making tank provided with an anti-freezing liquid collecting port for collecting the anti-freezing liquid stored outside and an anti-freezing liquid jetting hole for jetting the anti-freezing liquid from the outside, and a pump for pressurizing the anti-freezing liquid collected from the anti-freezing liquid collecting port provided on the bottom surface of the ice making tank. A refrigerator that cools the antifreeze liquid pressurized by the pump, a buffer tank that is installed at the bottom of the ice making tank, and stores the antifreeze liquid that has been cooled to below freezing by the refrigerator that flows in through the antifreeze liquid ejection hole, The antifreeze stored in the buffer tank is jetted out of the antifreeze in the refrigerant reservoir toward the water, so that a boundary between the water and the antifreeze is provided. A plurality of nozzles that generate foam-like droplets on the surface, and water is released when the cold stored in the droplets is released when the droplets collapse or are absorbed by the antifreeze at the interface. A plurality of ice making devices that produce ice by heat exchange are arranged side by side or vertically in multiple stages, and the pump and the refrigerator are connected in common to each ice making device to constitute an antifreeze circulation system. Heat storage device.