JP2002250547A - Ice storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool down the brine in a serpentine tube by the cold of ice through the cold water at about 0 deg.C by always substituting the water located between ice and the tube for the cold water at about 0 deg.C in an ice storage tank at the time of the cooling operation of an ice storage device. SOLUTION: The lower end part of a hose 2 meandering vertically in the ice storage tank 3 is provided with an ice-melting aid 20 made of a metal formed with the lower part having a length equal to or greater than the thickness of the ice Ic formed around the tube 2. Then, the warmed brine Br melts the inside of the ice Ic around the tube 2 to open the upper end part, and melts the ice Ic in the vicinity of the ice-melting aid 20 so as to form a melting hole H, where air Fo is injected from the melting hole H in the underside of the lower end part of the ice Ic. Then, the cold water in the ice storage tank 3 is introduced to move upwards in a tubular ice-melting part T.

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 an internal heat storage device or a combined ice heat storage device.

[0002]

2. Description of the Related Art In recent years, ice heat storage devices that produce ice using nighttime electric power and melt ice during the day to extract cold heat have become widespread in order to equalize the amount of electric power used per day.

As shown in FIG. 19, this ice thermal storage device, for example, an internal melting type ice thermal storage device 1 is provided with a serpentine pipe 2 which is bent sequentially at an upper portion and a lower portion and meanders up and down, and water is stored therein. An ice heat storage tank 3, a refrigerator 4, a heat exchanger 5, and a load device 6 such as an air conditioner are stored, and the serpentine tube 2, the refrigerator 4, and the heat exchanger 5 of the ice heat storage tank 3 are stored.
Are connected by a circulation circuit 7 of brine (heat medium such as antifreeze) Br (see FIGS. 20 to 22). A circuit connecting the outlet side of the refrigerator 4 and the inlet side of the heat exchanger 5 in the circulation circuit 7 is provided with a brine pump 8 and is located on the discharge side of the brine pump 8 to open and close. A valve 9A is provided. An on-off valve 9B is provided in a circuit connecting the outlet side of the heat exchanger 5 of the circulation circuit 7 and the inlet side of the serpentine tube 2 of the ice heat storage tank 3. further,
On-off valve 9 in a circuit connected to the inlet side of heat exchanger 5
A bypass valve 9C is provided in a bypass circuit that connects the downstream side of the on-off valve 9B in the circuit connected to the upstream side of A and the outlet side of the heat exchanger 5.

[0004] The heat exchanger 5 and the air conditioner, which is the load device 6, are connected by a heat medium circulating circuit 10 so that the heat exchanger 5 can exchange heat.

[0005] Inside the ice heat storage tank 3, an air pipe 1 having a plurality of small holes 11 a formed below the flexible tube 2.
The air pipe 11 is connected to a blower 12.

In the thus constructed ice heat storage device 1, when the brine pump 8 is driven while the on-off valves 9A and 9B are closed and the bypass valve 9C is opened, and the refrigerator 4 is driven, the brine Br Circulates through the circulation circuit 7 in the order of the serpentine tube 2 of the ice heat storage tank 3 and the refrigerator 4 via the bypass valve 9C (see the cooling / cooling operation in FIG. 19A). At this time, the brine Br is cooled to 0 ° C. or lower by the refrigerator 4 and passes through the inside of the flexible tube 2 of the ice heat storage tank 3, and the temperature of the flexible tube 2 is reduced to 0 ° C.
Cool below. As a result, water in contact with the outer peripheral surface of the flexible tube 2 is frozen, and a cylindrical ice Ic (FIG. 20) is formed around the flexible tube 2.
See). Further, the brine Br heated by heat exchange with water returns to the refrigerator 4 and is cooled again to 0 ° C. or lower. Thereafter, similarly, the brine Br circulates in the circulation circuit 7, is repeatedly cooled to 0 ° C. or lower, and passes through the coiled tube 2 of the ice heat storage tank 3. Therefore, the outer peripheral surface of the ice Ic formed on the outer periphery of the serpentine tube 2 and the water in contact with the outer peripheral surface continuously exchange heat, and the ice Ic continuous in a cylindrical shape around the meandering serpentine tube 2 is formed. The thickness gradually increases.

The steps in which ice Ic is gradually formed around the flexible tube 2 during such a cooling / cooling operation are shown in FIGS. 22 (a) to 22 (d).

In the cooling / cooling operation, the operation is automatically started at 10:00 pm via a controller (not shown).
It is controlled to stop automatically at 8:00 or when the amount of water in the ice heat storage tank 3 reaches the rated heat storage amount obtained.

On the other hand, when the brine pump 8 is driven with the on-off valves 9A and 9B opened and the bypass valve 9C closed, the brine Br is turned on and off by the on-off valve 9A, the heat exchanger 5, the on-off valve 9B, and the ice heat storage tank. The circulation circuit 7 circulates in the order of the coil 2 of FIG. 3 and the refrigerator 4 that is not driven (see the cooling operation of FIG. 19B). Further, the load device 6 is driven together. On this occasion,
The brine Br is cooled while passing through the flexible tube 2 in which the ice Ic is formed, and is supplied to the heat exchanger 5. Then, the brine Br exchanges heat with the heat medium of the load device 6 in the heat exchanger 5, is heated and returns to the ice heat storage tank 3, and is cooled.
Is cooled again while passing through the flexible tube 2. Further, the heat medium of the load device 6 is cooled by exchanging heat with the cooled brine Br in the heat exchanger 5. As a result, the load device 6 enters the cooling operation.

The brine Br warmed in the heat exchanger 5 exchanges heat with the cylindrical ice Ic formed around the coil 2 when passing through the coil 2 of the ice heat storage tank 3.
From the inside. Hereinafter, similarly, the circulation circuit 7
Are repeatedly circulated, and the brine Br warmed by the heat exchanger 5 and continuously passing through the coiled tube 2 of the ice heat storage tank 3 melts the ice Ic formed around the coiled tube 6 sequentially from inside to outside. Let it ice (see Figure 21).

The steps of melting the ice Ic formed around the flexible tube 2 from inside to outside during the cooling operation are shown in FIGS. 22 (d) to (a).

At this time, the air stored in the ice heat storage tank 3 is convected and agitated by operating the blower 12 and ejecting air from the small holes 11a of the air pipe 11 into the ice heat storage tank 3. .

By the way, in addition to the above-mentioned internal melting type ice heat storage device 1, there is also known an internal melting type and external melting type ice heat storage device.
As shown in FIG. 23, the combined ice melting apparatus 1A with the internal melting type and the external melting type cools the water stored in the ice heat storage tank 3 by passing the brine Br cooled by the refrigerator 4 through the coiled pipe 2. And
Ice Ic is formed around the flexible tube 2, and the brine Br heated by exchanging heat with the heat medium of the load device 6 in the heat exchanger 5 is passed through the flexible tube 2, and the brine Br in the flexible tube 2 is passed through the flexible tube 2. In addition to the configuration of the internal melting type ice heat storage device that is cooled by the ice Ic formed around, the cold water in the ice heat storage tank 3 is supplied to the load device 6 via the cold water pump 14 to exchange heat with the conditioned air. After cooling the conditioned air, a portion of the warmed cold water is returned to the cold water pump 14 through the heat exchanger 5, and the rest of the warmed cold water is returned to the ice heat storage tank 3, and formed around the flexible tube 2. It is provided with a configuration of an external melting type ice heat storage device for exchanging heat with the ice Ic and melting the ice Ic from the outside (for example, see Japanese Patent No. 2679503).

In the above description, the inside and outside of the ice are defined around the coil 2 in consideration of the combination of the ice Ic and the coil 2, and specifically, the ice Ic
The portion in contact with the serpentine tube 2 is referred to as “inside the ice”, and the portion in which the ice Ic contacts the water stored in the ice heat storage tank 3 is referred to as “outside the ice”.

[0015]

During INVENTION try to solve problems is] cooling operation UchiToru type ice thermal storage apparatus 1 described above, brine Br warmed in the heat exchanger 5 flows through the coiled 2, formed around the flexible tube 2 Ice By exchanging heat with Ic, the ice Ic melts from the inside in contact with the flexible tube 2. Therefore, a layer of water Wa is formed between the ice Ic and the flexible tube 2.

However, since this layer of water Wa is closed and closed by the ice Ic, it is gradually warmed by the warm brine Br flowing in the coiled tube 2 and the warm water W
a layer.

Accordingly, the ice Ic and the flexible tube 2 are cut off by the layer of warm water Wa, and the cold heat of the ice Ic is prevented from being transmitted to the brine Br through the flexible tube 2, and the brine Br in the flexible tube 2 is removed. It becomes hard to get cold. As a result, there is a problem that, despite the presence of the cylindrical ice Ic around the flexible tube 2, the warm brine Br in the flexible tube 2 is not cooled, and the cooling efficiency is reduced. For example,
When the brine Br heated to about 10 to 12 ° C. in the heat exchanger 5 flows through the flexible tube 2, the layer of the water Wa located between the flexible tube 2 and the cylindrical ice Ic is gradually warmed. ~ 5 ° C or higher.

That is, since the warm brine Br in the flexible tube 2 is to be cooled by the cylindrical ice Ic formed around the flexible tube 2, the ice Ic melts from the inside in contact with the flexible tube 2, and the ice Ic is removed. Although it is inevitable that a layer of water Wa is formed between the coil 2 and the pipe 2, the layer of water Wa stays still, and is gradually warmed by the warm brine Br in the pipe 2 to form a layer of warm water Wa. , Ice Ic
This causes a problem that the brine Br is not efficiently cooled.

Further, an ice heat storage device 1A for both internal melting type and external melting type
Of the ice Ic around the coiled pipe 2 in the internal melting type during the cooling operation of
Is melted from the inside, as described above, the ice Ic formed around the coiled tube 2 melts sequentially from the inside in contact with the coiled tube 2, and a layer of water Wa is formed between the ice Ic and the coiled tube 2. Is done. In addition, the layer of water Wa is gradually warmed by the warm brine Br flowing in the flexible tube 2, and becomes a layer of warm water Wa. Then, the ice Ic and the flexible tube 2 are cut off by the layer of the warm water Wa, so that the cold heat of the ice Ic is prevented from being transmitted to the brine Br via the flexible tube 2, and the brine Br in the flexible tube 2 is hardly cooled. Become. Therefore, despite the presence of the ice Ic around the flexible tube 2, the warm brine Br in the flexible tube 2 is not cooled, and the cooling efficiency is reduced.

That is, the ice heat storage device 1 for both the internal melting type and the external melting type
Even though it is A, the time during which the cooling effect can be exhibited by the internal melting method is extremely short, and when the layer of water Wa formed around the flexible tube 2 is warmed, the cooling effect is immediately reduced. Therefore, after the cooling effect of the internal melting type is reduced, the coiled pipe 2
The cooling operation is performed by almost relying on the external melting method utilizing the cold heat of the ice Ic formed around the outside from the outside of the ice Ic.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it has been found that ice is cooled by warmed brine during the cooling operation of an internal melting type ice heat storage device or a combined internal melting type and external melting type ice heat storage device. The layer of water formed between the coil and the coil is discharged from the inside of the ice without standing still, and cold water of about 0 ° C. stored in the ice heat storage tank is introduced into the ice to be replaced. An object of the present invention is to provide an ice heat storage device capable of improving cooling efficiency.

[0022]

According to the first aspect of the present invention,
A serpentine tube meandering vertically is arranged in the ice heat storage tank, and brine cooled by a refrigerator is passed through the snake tube to cool the water stored in the ice heat storage tank and form ice around the snake tube. ,
On the other hand, the brine heated by the load device or the heat exchanger is passed through the flexible tube, and the brine in the flexible tube is cooled by the ice formed around the flexible tube. It annexed to aid to form equivalent to at least a portion of the length longer than the thickness of ice formed around the coiled or ice thickness 該解 ice aid,
It is characterized in that the heat of the brine that has been heated by the load device or heat exchanger is to comb the deicing aid near the ice with melts from its inner side around the ice of the flexible tube.

According to the second aspect of the present invention, a serpentine pipe meandering in the vertical direction is provided in the ice heat storage tank, and an air pipe having a number of small holes formed below the serpentine pipe is provided and cooled by a refrigerator. The cooled brine is cooled by passing the brine into the ice heat storage tank to form ice around the coil, while the brine heated by a load device or a heat exchanger is passed through the coil, The brine in the flexible pipe is cooled by the ice formed around the flexible pipe, and air is blown out from a number of small holes of an air pipe located below the flexible pipe. An ice-melting aid is attached, and the length of the lower part of the ice-melting aid is formed to be longer than or equal to the thickness of ice formed around the coiled tube, and is controlled by a load device or a heat exchanger. The heated brine heats the snake Melts the ice around it from the inside and melts the ice in the vicinity of the ice-melting aid, and further blows the air blasted out of the air pipe through the ice melting hole formed on the lower surface of the lower end of the coiled pipe to the inside of the ice. And forcibly raises cold water below the ice heat storage tank introduced into the ice.

According to a third aspect of the present invention, a serpentine tube meandering vertically is provided in an ice heat storage tank, and an air pipe having a number of small holes formed below the serpentine tube is provided and cooled by a refrigerator. The cooled brine is cooled by passing the brine into the ice heat storage tank to form ice around the coil, while the brine heated by a load device or a heat exchanger is passed through the coil, The brine in the flexible pipe is cooled by the ice formed around the flexible pipe, and air is blown out from a number of small holes of an air pipe located below the flexible pipe. An ice-melting aid is attached, and the length of the lower part of the ice-melting aid is longer than or equal to the thickness of ice formed around the coiled pipe, and the lower end of the coiled pipe is located below the lower end of the coiled pipe. A foam collector with a vertical cross section is attached to The heat of the brine warmed by the device or heat exchanger melts the ice around the coil from the inside, melts the ice near the ice-melting aid, and blows air from the air pipe to collect the air. It is collected by a foaming device and guided to the inside of the ice from the ice melting hole formed on the lower side of the lower end of the coiled tube, and the cold water below the ice heat storage tank introduced inside the ice is forcibly raised. It is assumed that.

The invention according to a fourth aspect is characterized in that the foam collecting device is suspended from a lower end of a flexible tube.

According to a fifth aspect of the present invention, a serpentine tube meandering vertically is provided in an ice heat storage tank, and an air pipe having a number of small holes formed below the serpentine tube is provided and cooled by a refrigerator. The cooled brine is cooled by passing the brine into the ice heat storage tank to form ice around the coil, while the brine heated by a load device or a heat exchanger is passed through the coil, The brine in the flexible pipe is cooled by the ice formed around the flexible pipe, and air is blown out from a number of small holes in the air pipe located below the flexible pipe. A C-shaped metal foaming device is integrally connected and used as an ice-melting aid,
The length of the lower part of the foam collector is longer than or equal to the thickness of the ice formed around the flexible tube, and the heat of the brine heated by the load device or the heat exchanger is applied to the flexible tube. with melts around the ice from the inner melted the collection Awagu vicinity of ice, further jetted air from air pipe, which is formed at the lower end lower surface of the flexible tube to collect the air by Atsumariawa tool Guide the ice from the melting hole to the inside of the ice,
Is characterized in that for forcibly increasing the cold water inside the ice thermal storage tank is introduced beneath the ice.

According to a sixth aspect of the present invention, the cold water outside the ice formed around the serpentine tube in the ice heat storage tank is guided to a load device or a heat exchanger and then returned to the ice heat storage tank again. It is characterized by doing so.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a partially omitted embodiment of an internal melting type ice heat storage device 1 of the present invention.

In the internal melting type ice heat storage device 1, FIG.
The same members as those shown in FIG. 9 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The inner melting type ice heat storage device 1 is configured by providing a metal ice melting aid 20 at each of an upper end and a lower end of a serpentine tube 2 meandering vertically.

The ice-melting aid 20 is made of, for example, a circular or rectangular plate, and has at least a portion of a length of the flexible tube 2.
Is formed to be longer than the thickness of the ice Ic formed around the periphery. That is, when the ice Ic is formed to have a predetermined thickness around the coiled tube 2 by the cooling / cooling operation of the internal melting type ice heat storage device 1, at least a part of the ice-melting aid 20 exceeds the outer surface of the ice Ic. It is set to protrude.

The metal hanging member 2 for suspending the flexible tube 2
1 may be attached to the ice-melting assisting tool 20, in which case the hanging tool 21 necessarily exceeds the thickness of the ice Ic.

Therefore, during the cooling operation of the internal melting type ice heat storage device 1, the brine Br warmed by the heat exchanger 5 flows through the coiled tube 2 of the ice heat storage tank 3, warms the coiled tube 2 and surrounds the coiled tube 2. The formed ice Ic is thawed from the inside. Further, the brine Br heated by the heat exchanger 5 heats the flexible pipe 2 and also transfers heat to the metal melting aid 20, and the upper end of the flexible pipe 2 arranged to meander vertically and The ice Ic near the ice-melting aid 20 attached to the lower end is thawed. Here, at least part of the length of the ice-melting aid 20 is equal to the ice Ic.
Is formed longer than the thickness of the ice, and the upper and lower ends of the ice lc that meanders in a cylindrical shape and are continuous are provided with cylindrical ice l.
A melting hole H is formed which communicates the water Wa in the cylindrical ice melting part T formed inside and outside of the ice c, that is, the cold water of about 0 ° C. stored in the ice heat storage tank 3. (See FIG. 2).

On the other hand, since the warm brine Br flows continuously in the flexible tube 2, the ice Ic formed around the flexible tube 2 melts from the inside, and the molten water Wa in the cylindrical ice Ic is Warm gradually from 0 ° C. By the way, as is well known, the density of water is maximum at about 4 ° C. Therefore, the density of the water Wa in the cylindrical ice Ic gradually increases while rising from 0 ° C. to 4 ° C.
Becomes smaller gradually beyond. Therefore, the cylindrical ice I
The water Wa in c is heated from 0 ° C. to a temperature close to 4 ° C., so that the water Wa has a higher density than the cold water of about 0 ° C. in the ice heat storage tank 3. Then, convection occurs due to the difference in the water density, and the water Wa in the cylindrical ice Ic descends and is discharged into the ice heat storage tank 3 from the melting hole H formed at the lower end of the ice Ic.
About 0 ° C. cold water in the ice heat storage tank 3 enters through the melting hole H formed at the upper end of the ice Ic and is replaced. Further, when the temperature of the water Wa in the cylindrical ice Ic exceeds 4 ° C. and becomes lower than the density of the cold water of about 0 ° C. in the ice heat storage tank 3,
Convection occurs due to the difference in water density, and water W in the cylindrical ice Ic
a rises and is discharged into the ice heat storage tank 3 from the melting hole H formed at the upper end of the ice Ic, and approximately from the melting hole H formed at the lower end of the ice Ic into the ice heat storage tank 3. Cold water at 0 ° C. enters and is replaced.

As a result, the cold water of about 0 ° C. in the ice heat storage tank 3 continuously flows between the flexible pipe 2 and the inside of the ice Ic, and the flexible pipe 2 through which the warm brine Br flows.
Is always in contact with cold water Wa at about 0 ° C. Therefore, the cold heat of the cylindrical ice Ic cools the flexible tube 2 and the brine Br in the flexible tube 2 via the cold water Wa of about 0 ° C. interposed between the cylindrical ice Ic and the flexible tube 2. That is, the warm water Wa around the flexible tube 2 is quickly discharged, and the cylindrical ice lc is discharged.
Since the cold water Wa of about 0 ° C. is always present between the water and the coil 2, the cold stored in the ice Ic can be efficiently extracted and used effectively.

In such an internal melting type ice heat storage device 1,
As shown in FIG. 3, the upper end of the flexible tube 2 may protrude from the surface of the water stored in the ice heat storage tank 3. In this case, the metal melting aid 20 is provided only at the lower end of the flexible tube 2.

During cooling operation of the internal melting type ice heat storage device 1 in which the upper end of the flexible tube 2 protrudes from the water surface and the ice melting aid 20 is provided only at the lower end, the brine Br heated by the heat exchanger 5 is used. Flows through the coiled tube 2 of the ice heat storage tank 3 to warm the coiled tube 2 to melt the ice Ic formed around the coiled tube 2 from the inside thereof, and at the same time to use a metal solution attached to the lower end of the coiled tube 2. The ice Ic near the ice auxiliary tool 20 is thawed. Therefore, the upper end of the cylindrical ice melting portion T formed by melting the ice Ic around the coiled tube 2 opens to the gas phase in the upper part of the ice heat storage tank 3. A melting hole H is formed in the vicinity of the ice melting aid 20 at the lower end of the ice Ic to communicate the water Wa inside the ice Ic with the cold water in the ice heat storage tank 3.

On the other hand, since the warm brine Br flows continuously in the flexible tube 2, the ice Ic formed around the flexible tube 2 melts from the inside thereof, and the water Wa in the cylindrical ice Ic becomes zero.
It is gradually warmed from ℃. Therefore, the water Wa in the cylindrical ice Ic is heated from 0 ° C. to around 4 ° C., so that the water Wa has a higher density than the cold water of about 0 ° C. in the ice heat storage tank 3. Then, convection occurs due to the difference in the water density, and the water Wa having a high density in the cylindrical ice Ic descends and is discharged into the ice heat storage tank 3 from the melting hole H formed at the lower end of the ice Ic.
Instead, cold water at a low density of about 0 ° C. in the ice heat storage tank 3 enters through the melting hole H formed at the lower end of the ice Ic and is replaced.

FIG. 4 shows another embodiment of the internal melting type ice heat storage device 1 of the present invention.

The ice heat storage device 1 is also provided with a metal ice melting aid 20 at each of the upper and lower ends of a serpentine tube 2 meandering vertically.

The ice-melting aid 2 provided at the upper end of the flexible tube 2
0 is longer than the thickness of the ice Ic length of at least a portion is formed around the flexible tube 2. In the case where the length of a part is long, it is more preferable that the long part is protruded above the outer surface of the ice Ic, but it is not always necessary to protrude upward. Or project downward.

On the other hand, the ice-melting aid 20 provided at the lower end of the flexible tube 2 is formed such that only the lower portion is longer than the thickness of the ice Ic formed around the flexible tube 2. The long portion protrudes below the outer surface of the ice Ic.

Therefore, during the cooling operation of the internal melting type ice heat storage device 1, the brine Br warmed by the heat exchanger 5 flows through the coiled tube 2 of the ice heat storage tank 3, warms the coiled tube 2 and surrounds the coiled tube 2. The formed ice Ic is thawed from the inside. Further, the brine Br heated by the heat exchanger 5 heats the flexible pipe 2 and also transfers heat to the metal melting aid 20, and the upper end of the flexible pipe 2 arranged to meander vertically and The ice Ic near the ice-melting aid 20 attached to the lower end is thawed. Here, the ice-melting aid 20 provided at the upper end of the flexible tube 2
Since at least a part of the length is formed longer than the thickness of the ice Ic, a melting hole communicating the inside and the outside of the cylindrical ice Ic is provided at the upper end of the ice Ic meandering and continuing in a cylindrical shape. H is formed. Further, the ice-melting aid 20 provided at the lower end of the flexible tube 2 is formed such that only the lower part is longer than the thickness of the ice lc formed around the flexible tube 2, and this longer portion is formed. Is protruded below the outer surface of the ice Ic, so that a melting hole H communicating between the inside and the outside of the ice Ic is formed on the lower surface of the lower end of the ice lc that is continuous in a cylindrical shape.

That is, the water Wa in the cylindrical ice melting part T inside the ice Ic and the cold water of about 0 ° C. in the ice heat storage tank 3 are provided on the lower surface side of the upper end and the lower end of the ice Ic continuous in a cylindrical shape. Are formed respectively (see FIG. 5).

It is desirable that the length of at least a part of the ice-melting aid 20 be set longer than the thickness of the ice Ic formed in a cylindrical shape around the flexible tube 2. Even if they are made equal, substantially the same effect can be obtained, and the water Wa inside the ice Ic and about 0% in the ice heat storage tank 3 Melting holes H communicating with the cold water of ° C. are respectively formed.

Next, when the blower 12 is operated and air is ejected from the small holes 11a of the air pipe 11 into the ice heat storage tank 3, the water stored in the ice heat storage tank 3 is convected and agitated. Air Fo enters through a melting hole H formed on the lower surface side of the lower end of the cylindrical ice Ic, rises in a cylindrical ice melting part T located between the coiled tube 2 and the ice Ic, and rises in the cylindrical ice Ic. It exits from the melting hole H formed at the upper end of the ice Ic.
As described above, when the air Fo rises inside the cylindrical ice melting part T, the apparent specific gravity of the water Wa in the cylindrical ice melting part T and the ice heat storage tank 3
A difference occurs in the specific gravity of the cold water inside, and by the so-called air lift action, cold water of about 0 ° C. below the ice heat storage tank 3 is introduced from the melting hole H on the lower surface side of the lower end of the ice Ic, and the cylindrical ice melting portion T Rises inside.

That is, the cold water outside the ice Ic is
Enters the inside of the cylindrical ice melting portion T through the melting hole H on the lower surface side of the lower end portion, rises inside the melting portion H, and melts at the upper end portion of the ice Ic.
Is discharged from. In this way, new cold water of about 0 ° C. in the ice heat storage tank 3 successively enters the inside of the cylindrical ice melting part T from the melting hole H on the lower surface side of the lower end of the ice Ic. Is always filled with about 0 ° C. cold water.

Thus, the inside of the cylindrical ice Ic and the flexible tube 2
Since the cold water of about 0 ° C. in the ice heat storage tank 3 successively enters and rises between the outer surface and the outer surface of the heat storage tank 3, the outer surface of the flexible tube 2 through which the warm brine Br continuously flows always contacts the cold water Wa.
Further, the cold water Wa in the cylindrical ice Ic is heated by the warm brine B.
Although it tends to be warmed by r, it is always cooled by the cold heat of the cylindrical ice Ic. In this way, the warm brine Br in the flexible tube 2 is continuously cooled by the cold water Wa of about 0 ° C. and the cold heat of the cylindrical ice Ic. That is, there is no warm water Wa around the snake tube 2 and only the cold water Wa at about 0 ° C. Therefore, the cold heat held by the ice Ic is efficiently taken out,
The brine Br flowing in the flexible tube 2 can be efficiently cooled.

[0050] The brine temperature and time relationship of the flexible tube within 2 during cooling operation of such UchiTorushiki ice heat storage device, Fig. 6
Shown in In FIG. 6, a graph line indicates a cooling operation of the conventional internal melting type ice heat storage device in a case where stirring by air ejection is not performed, and a graph line indicates a conventional one in a case where stirring by air ejection is performed. Fig. 4 shows a cooling operation of the melting ice heat storage device. Further, the graph line represents the cooling operation of UchiToru type ice thermal storage apparatus shown in FIG. 1 (the case of natural convection), the graph line is forced by blowing UchiToru type ice thermal storage apparatus (air shown in FIG. 4 This shows the cooling operation (in the case of convection).

It is apparent from FIG. 6 that in the case of the graph line, since the brine temperature in the flexible tube 2 rises almost proportionally with the elapse of time, the cold heat of the ice lc cannot be fully utilized. It is to be noted that the brine temperature sharply rises after 10 hours and then drops once because the temperature inside the cylindrical ice Ic suddenly rises after this cylindrical ice Ic rises.
The value of “c” largely collapsed, indicating that the brine Br in the flexible tube 2 was cooled somewhat by the cold stored in the water in the ice heat storage tank 3. Further, the brine temperature rises rapidly thereafter because the ice Ic in the ice heat storage tank 3 has disappeared. In the case of the graph line, as in the case of the graph line, the brine temperature rises with the passage of time, but after about 5 hours, holes are opened in the cylindrical ice Ic,
This indicates that even if the air enters the inside of the cylindrical ice Ic and is not sufficient, an air lift effect occurs somewhat and the brine temperature decreases. Thereafter, when the ice Ic melts, the brine temperature rises sharply.

Meanwhile, (in the case of natural convection) When the graph line, the brine temperature was after about 10 hours is maintained at about 4 ° C., but then, the brine temperature when the ice Ic resulting in melt increases rapidly. In the case of the graph line (in the case of forced convection due to air blowing), the brine temperature is maintained at about 2 ° C., and about 10 hours have passed. Thereafter, as in the graph line, the ice Ic melts and the brine temperature rises rapidly. I do.

As a result, in the case of the graph line, it is clear that the cold heat of the ice Ic is efficiently taken out and the brine Br flowing in the flexible tube 2 is continuously cooled efficiently. In particular, in the case of the graph line, energy can be exchanged very efficiently by blowing air at the time of melting ice.

Incidentally, in each of the above-described embodiments, the explanation has been given so far as showing the internal melting type ice heat storage device 1.
The present invention may be applied to not only the internal melting type ice thermal storage device 1 but also the internal melting type / external melting type ice thermal storage device 1A.

This internal / external melting type ice heat storage device 1A
Is, for example, as shown in FIG. 7, two heat exchangers 5A,
5B, the serpentine tube 2 of the ice heat storage tank 3, the refrigerator 4 and one heat exchanger 5A are connected by a circulation circuit 7 of brine Br, and the ice heat storage tank 3 and the other heat exchanger 5B are used for cold water. The circuit is connected by a circulation circuit 13, and the load device 6 and the two heat exchangers 5 </ b> A and 5 </ b> B are connected by a heat medium circulation circuit 10.

A chilled water pump 14 is provided in the chilled water circulation circuit 13 so that the chilled water circulates through the ice heat storage tank 3 and the heat exchanger 5B. Further, a heat medium pump 15 is provided in the heat medium circulation circuit 10, and the load device 6 is provided.
And two heat exchangers 5A, 5B heat medium (e.g.,
Water, conditioned air, etc.) are set to circulate.

In the circulation circuit 7 of the brine Br, the inlet side and the outlet side of the heat exchanger 5A are connected by a bypass circuit, and the bypass circuit is connected to the outlet side of the heat exchanger 5A and the ice heat storage tank 3. A solenoid on-off valve (three-way valve) 16A is provided at the junction with the circuit connecting the inlet side of the flexible tube 2.
Are arranged. Therefore, by controlling the opening and closing of the electromagnetic on-off valve 16A of the bypass circuit, all or a part of the brine Br discharged from the brine pump 8 can be supplied to the heat exchanger 5A to exchange heat with the heat medium.

In the circulating circuit 13 for cold water, the inlet side and the outlet side of the heat exchanger 5B are connected by a bypass circuit.
B is provided. Therefore, by controlling the closing of the electromagnetic on-off valve 16B, it is possible to supply all or a part of the cold water below the ice heat storage tank 3 discharged from the cold water pump 14 to the heat exchanger 5B to exchange heat with the heat medium. it can.

Further, in the heat medium circulation circuit 10,
Electromagnetic on-off valves 16C and 16D are provided on the inlet side and the outlet side of the heat exchanger 5A and the heat exchanger 5B, respectively. A bypass circuit connects between the upstream side of the electromagnetic on-off valve 16C provided on the inlet side of the heat exchanger 5B and the downstream side of the electromagnetic on-off valve 16D provided on the outlet side of the heat exchanger 5B. At the junction of the circuit and the branch circuit branched from the upstream side of the electromagnetic on-off valve 16C provided on the inlet side of the heat exchanger 5A, an electromagnetic on-off valve (three-way valve) 1
6E is provided.

Therefore, the solenoid on-off valve 1 of the heat exchanger 5B
6C and 16D are controlled to be closed, the electromagnetic switching valves 16C and 16D of the heat exchanger 5A are controlled to be opened, and the electromagnetic switching valve 16E of the bypass circuit is controlled to be opened and closed so that the heat medium flows through the bypass circuit. Thus, the heat medium discharged from the heat medium pump 15 can be supplied to the heat exchanger 5A to exchange heat with the brine Br. In addition, the electromagnetic switching valves 16C and 16D of the heat exchanger 5A are controlled to be closed, and the electromagnetic switching valves 16C and 16D of the heat exchanger 5B are controlled to be opened. By controlling the opening and closing of the electromagnetic on-off valve 16E of the bypass circuit so as to flow through the side), the heat medium can be supplied to the heat exchanger 5B to exchange heat with cold water. Furthermore, the solenoid on-off valve 16C of the heat exchanger 5A,
16D and solenoid on-off valves 16C, 16D of heat exchanger 5B
Of the heat exchanger by controlling the opening and closing of the solenoid valve 16E of the bypass circuit so that the heat medium does not flow through the branch circuit and the bypass circuit.
A and the heat exchanger 5B can be sequentially supplied to cause heat exchange with the brine Br in the heat exchanger 5A and heat exchange with cold water in the heat exchanger 5B.

That is, the solenoid on-off valves 16C, 16D, 1
6E, the heat medium is supplied to either the heat exchanger 5A or the heat exchanger 5B to exchange heat with the brine Br or the cold water, or the heat medium is exchanged with the heat exchangers 5A and 5B. And heat exchange with brine Br and heat exchange with cold water.

In the thus configured ice heat storage device 1A for both internal melting and external melting, if the refrigerator 4 is operated to perform the cooling / cooling operation, water in contact with the outer peripheral surface of the flexible tube 2 is frozen one after another. In addition, it is possible to generate the ice Ic that continues in a cylindrical shape around the flexible tube 2.

FIG. 7 shows that the tubular ice Ic generated around the flexible tube 2 is connected to each other by arranging the flexible tube 2 densely in the ice heat storage tank 3 via the header 2A and performing the cooling / cooling operation. This shows a state in which a block of ice Ic is formed.

Also, in the combined internal / external melting type ice heat storage apparatus 1A shown in FIG. 7, metal melting ice assisting devices 20 are provided at the upper end and the lower end of the serpentine tube 2 meandering vertically. ing. However, it is not necessary to provide the deicing aid 20 at the beginning and end of the flexible tube 2 connected to the header 2A.

The ice-melting aid 20 provided at the upper end of the flexible tube 2 is formed such that only the upper portion is longer than the thickness of the ice Ic formed around the flexible tube 2. Further, the ice-melting aid 20 provided at the lower end of the flexible tube 2 is formed such that only the lower portion is longer than the thickness of the ice Ic formed around the flexible tube 2.

In the combined internal / external melting type ice heat storage apparatus 1A configured as described above, the electromagnetic switching valves 16C to 16E are controlled to open and close, and the heat medium is sequentially supplied to the heat exchangers 5A and 5B. When the cooling operation is performed, the brine Br discharged from the brine pump 8 becomes the flexible tube 2 on which the ice Ic is formed.
It is cooled while passing through the inside and supplied to the heat exchanger 5A,
The heat exchanger 5A exchanges heat with the heat medium of the load device 6,
It is heated and returns to the ice heat storage tank 3, and is cooled again while passing through the coiled tube 2 of the ice heat storage tank 3. The cold water discharged from the cold water pump 14 at the lower part of the ice heat storage tank 3 is supplied to the heat exchanger 5B, exchanges heat with the heat medium of the load device 6 in the heat exchanger 5B, and is heated and transferred to the ice heat storage tank 3. Returning, it exchanges heat with ice Ic formed around the flexible tube 2 and is cooled again.

At this time, the heat medium of the load device 6 is first cooled by exchanging heat with the brine Br in the heat exchanger 5A, and is further cooled by exchanging heat with cold water in the heat exchanger 5B.

The brine Br warmed in the heat exchanger 5A exchanges heat with the ice Ic formed around the coil 2 when passing through the coil 2 of the ice storage tank 3.
c is sequentially thawed from inside to outside. The brine Br warmed by the heat exchanger 5A is
And heat is also transmitted to the metal deicing auxiliary tool 20 to remove the ice Ic near the deicing auxiliary tool 20 attached to the upper end and lower end of the flexible tube 2 arranged to meander in the vertical direction. The ice is thawed, and the inside of the ice Ic and the ice heat storage tank 3 are placed on the upper surface of the upper end of the ice Ic.
A melting hole H is formed to communicate with the gaseous phase portion in the inside, and the inside of the ice Ic and the ice heat storage tank 3 are formed on the lower surface of the lower end of the ice lc.
A molten hole H communicating with cold water at about 0 ° C. is formed.

Next, when the blower 12 is operated, the air blown into the ice heat storage tank 3 from the small hole 11a of the air pipe 11 not only convections the water stored in the ice heat storage tank 3 but also agitates the water. Part of the air enters through the melting hole H formed on the lower surface side of the lower end of the block-shaped ice Ic, rises in the cylindrical ice-melting portion T formed between the flexible tube 2 and the ice Ic, and blocks. Ice Ic from the melting hole H at the upper end of the ice Ic
And is discharged into the gas phase portion of the ice heat storage tank 3. For this reason, cold water at about 0 ° C. below the ice heat storage tank 3 is introduced from the melting hole H on the lower surface of the lower end of the block-shaped ice Ic and rises in the cylindrical ice melting part T by a so-called air lift action. From the melting hole H at the upper end of the block-like ice Ic.
Overflows on the upper surface of the ice and flows on the upper surface of the block-like ice Ic,
It flows into the cold water at the periphery of the ice heat storage tank 3 (see FIG. 16). In this way, new cold water of about 0 ° C. below the ice heat storage tank 3 sequentially enters the cylindrical ice melting part T from the melting hole H on the lower surface side of the lower end of the block-shaped ice Ic. Hibe T
The inside is always filled with cold water of about 0 ° C.

Therefore, the outer surface of the flexible tube 2 through which the warm brine Br continuously flows is always in contact with the cold water Wa.
Since the cold water Wa is always cooled by the cold heat of the cylindrical ice Ic, the warm brine Br in the flexible tube 2
Is continuously cooled by the cold water held by the cold water Wa at about 0 ° C. and the cylindrical ice Ic. That is, the coil 2
, There is no warm water Wa.
Since it is only a, the cold heat of the ice Ic can be efficiently extracted, and the brine Br flowing in the flexible tube 2 can be efficiently cooled.

Incidentally, the ice heat storage device 1A for both the internal melting type and the external melting type is used.
In the above, simultaneous operation of an internal melting type in which ice is melted from the inside of the ice Ic formed around the coiled tube 2 and an external melting type in which ice is melted from the outside of the ice Ic are possible, but both of them are necessarily required. It is not necessary to operate the internal fusion type and / or the external fusion type appropriately and appropriately according to various conditions such as electric power conditions (peak cut operation in a time zone where power consumption is large) and the like. Have been.

The above-described ice heat storage device 1 for both internal melting type and external melting type
In the embodiment of A, by selectively switching the solenoid on-off valves 16C to 16E, the heat medium of the load device 6 is supplied to either the heat exchanger 5A or the heat exchanger 5B, and the brine Br or the cold water is supplied. The case where the heat exchange is performed or the heat medium of the load device 6 is sequentially supplied to the heat exchangers 5A and 5B to cause the heat exchange with the brine Br and then the heat exchange with the cold water has been described. Brine Br
The heat medium circulation circuit 10 may simply be connected in series with the heat exchanger 5A that exchanges heat with the heat exchanger 5B and the heat exchanger 5B that exchanges heat with the cold water. Thus, the heat medium circulation circuit 1
When 0 is configured, the electromagnetic on-off valves 16C to 16E for selectively controlling the heat exchangers 5A and 5B become unnecessary, so that the cost can be reduced and the control system can be simply constructed.

In the embodiment of the combined internal / external melting type ice heat storage device 1 A shown in FIG. 8, the cold water sucked from the suction pipe 17 disposed at the bottom of the ice heat storage tank 3 is supplied by the cold water pump 14. After being led to the heat exchanger 5B and heated by heat exchange with the heat medium in the heat exchanger 5B, the heat is formed in the ice heat storage tank 3 from the nozzle 18a of the return pipe 18 arranged in the space above the ice heat storage tank 3. A case is shown in which the particles are scattered on the block-shaped ice Ic. Also, a case is shown in which the upper end of the flexible tube 2 protrudes upward from the water surface of the ice heat storage tank 3, and the metal melting aid 20 is provided only at the lower end of the flexible tube 2.

As the ice-melting aid 20, various shapes and structures can be adopted. For example, as shown in FIG. 9, an ice-melting aid 20 formed of a circular or square plate material 20 </ b> A may be welded to the flexible tube 2. In this case, the size of the plate member 20A is set so that at least a part thereof protrudes beyond the outer surface of the ice Ic formed around the coiled tube 2. As shown in FIG. 10, two semicircular members 20B, 20B each having a semicircular portion having an inner diameter corresponding to the outer diameter of the flexible tube 2 are attached to the flexible tube 2, and a fastening member, for example, a bolt nut is used. And then fasten the ice melting aid 20
It may be. As shown in FIG. 11, a band 20C is wound around the flexible tube 2 to fix the ends thereof.
A metal hanger 21 for suspending the flexible tube 2 may be connected to the end of C to serve as an ice-melting aid 20. In this case, band 2
The hanging tool 21 connected to OC always projects beyond the outer surface of the ice Ic. Further, as shown in FIG.
To turn over a U-bolt 20D, to the U-bolt 20D, for example, a plate member 20E which is bent into an L-shaped hanging through the nut, forms part of the plate 20E to the length exceeding the thickness of the ice Ic Alternatively, the ice melting aid 20 may be used.

Further, as shown in FIG.
Two substantially Ω-shaped bent bodies 2 having an inner diameter portion corresponding to the outer diameter of
0F, fitted with a 20F to coiled 2, sandwiched by by coupling or, 13 (b), the flexible tube 2 to one end engageable with been fin with semicircular member 20G
, And may be sandwiched and connected to each other to serve as the ice-melting aid 20. At this time, the substantially Ω-shaped bent body 20
F, the length is set so that a part of the semicircular member 20G with fins is larger than the thickness of the ice Ic, and when attaching to the upper end of the flexible tube 2, the portion exceeding the thickness of the ice Ic is attached upward ( 13 (a), and when attaching to the lower end of the flexible tube 2, it is preferable to attach a portion exceeding the thickness of the ice Ic downward (FIG. 13 (b)).
reference).

It is preferable that the length of at least a part of the ice-melting aid 20 be longer than the thickness of the ice Ic formed around the flexible tube 2. In this case, substantially the same effect can be obtained.

The flexible tube 2 may be a metal tube 2A made of a copper alloy or the like as shown in FIG. 14 (a), or an aluminum alloy or the like as shown in FIG. 14 (b). It may be a multi-layer tube in which the inner and outer peripheral surfaces of the metal tube 2A 'are covered with a plastic 2B such as polyethylene.

Further, as shown in FIG. 15, the cold water is forcibly supplied from the cylindrical ice melting portion T around the flexible tube 2 by the air lift action.
In the ice heat storage devices 1 and 1A that are guided to the inside, the ice Ic has a vertical cross-sectional shape such as a conical shape or a pyramid shape that faces directly below a melting hole H formed on the lower surface of the lower end portion of the ice Ic. The formed foam collecting device 19 is provided, and the small hole 11a of the air pipe 11 is provided.
It is preferable to collect the air ejected from the air and guide the air from the melting hole H of the ice Ic into the cylindrical ice melting part T. That is, suspending the Atsumariawa device 19 from the lower portion of the thawed aid 20 provided at the lower end of the flexible tube 2, or is capable engaging the engaging portion K provided in the ice-aid 20 Atsumariawa The tool 19 is installed on the bottom surface of the ice heat storage tank 3 so as to hold the air pipe 11.
Collecting device 19 straddling the air pipe 11 provided on the bottom surface of the
Is installed, the air ejected from the small holes 11a of the air pipe 11 is collected by the bubble collecting device 19, and the ice Ic is collected.
Through the melting hole H, and can be efficiently guided into the cylindrical ice melting portion T around the coiled tube 2.

As shown in FIG. 16, a metal foaming device 19 is provided at the lower end of the flexible tube 2 in place of the ice dissolving aid 20, and the foam collecting device 19 is also used as the ice dissolving aid 20. You may do so. In addition, the foam collecting device 1 is provided at the lower end of each flexible tube 2 respectively.
It may be attached to 9, or may be attached to Atsumariawa device 19 over the lower portion of the plurality of the flexible tube 2.
When such a configuration, the heat of the brine Br is transmitted to the current bubble device 19 through the flexible tube 2, around the ice I of Atsumariawagu 19
Since c is melted, a melting hole H is formed at the lower end of the flexible tube 2. Therefore, the air spouted from the small holes 11 a of the air pipe 11 can be collected by the bubble collecting device 19 and efficiently guided into the cylindrical ice melting portion T around the flexible tube 2.

Further, as shown in FIGS. 17 and 18, a foam-collecting device 19 made of a material other than metal may be fixed to the de-icing aid 20 by a bolt or a nut, or the lower end of the flexible tube 2 may be fixed to the lower end of the flexible tube 2. Suspension tool 1 with ice-melting aid 20
91 may be fixed by welding or the like, and the foam collection device 19 made of a material other than metal may be attached to the suspension device 191 by using a bolt and a nut.

As described above, as the material of the foam collecting device 19,
Metal or plastic can be appropriately selected.
In addition, the foam collecting device 19 can be attached to the lower end of each flexible tube 2 individually or over the lower end of a plurality of flexible tubes 2.

[0082]

According to the first aspect of the present invention, a metal deicing auxiliary tool is provided at the lower end of a serpentine pipe meandering vertically in the ice heat storage tank, and at least a part of the deicing auxiliary tool is provided. By making the length of the ice longer than or equal to the thickness of the ice formed around the coil, the heat of the brine heated by the load device or heat exchanger is reduced to only the ice around the coil. In addition, the ice near the ice-melting aid is also melted, forming a cylindrical ice-melting section between the ice and the snake tube, which is a layer of water that has melted ice, and a melting hole at the lower end of the ice. Then, the water in the cylindrical ice melting part and the water in the ice heat storage tank are communicated. In addition, since the warm brine continuously flows in the flexible tube, the water at 0 ° C. in the cylindrical ice-melting section is warmed and the density increases. The density of water is maximum at about 4 ° C. Therefore, the density of water in the cylindrical ice melting section gradually increases while rising from 0 ° C. to 4 ° C., but gradually decreases when it exceeds 4 ° C. Therefore, the water in the cylindrical ice melting section is heated from 0 ° C. to a temperature close to 4 ° C., and thus has a higher density than the cold water of about 0 ° C. in the ice heat storage tank.

Here, when the ice melting aid is also provided at the upper end of the flexible tube and the flexible tube is immersed in the water in the ice storage tank, a melting hole is also formed at the upper end of the ice. You. Therefore, the water in the cylindrical ice-melting part located between the ice and the coiled pipe,
When the density of the cold water in the ice heat storage tank is higher than about 0 ° C., that is, about 4 ° C., the water located between the ice and the coil falls and the ice formed at the lower end of the coil becomes lower. The water is discharged from the melting hole, and instead, the cold water of about 0 ° C. in the ice heat storage tank enters from the melting hole formed at the upper end of the flexible tube. In addition, when the water in the cylindrical ice melting section located between the ice and the coil is smaller than the density of cold water at about 0 ° C. in the ice storage tank, the water located between the coil and the ice rises. Then, the ice is discharged from the ice melting hole formed at the upper end of the flexible tube, and instead, the cold water of about 0 ° C. in the ice heat storage tank enters from the melting hole formed at the lower end of the flexible tube.

When the upper end of the flexible tube projects upward from the water surface in the ice storage tank, the heat of the brine heated by the load device or the heat exchanger melts the ice around the flexible tube, together to open the upper portion of the ice and melted even ice-aid vicinity of ice to form a melt hole the lower end of the ice.
That is, a cylindrical ice-melting part, which is a layer of water in which the ice is melted, is formed between the ice and the flexible tube, and water in the cylindrical ice-melting part communicates with water in the ice heat storage tank. For this reason, convection occurs due to the density difference between the water in the cylindrical ice-melting section located between the ice and the coiled pipe and the cold water at about 0 ° C. in the ice heat storage tank, and the warmed water having the increased density descends. Then, the water is discharged from the melting hole into the ice heat storage tank, and the cold water of about 0 ° C. in the ice heat storage tank enters the cylindrical ice melting part through the melting hole and is replaced.

Thus, natural convection occurs, and cold water always exists between the ice and the coil. Ice and serpentine
Constantly in contact via the cold water of approximately 0 ° C., by cold ice owns, it is possible to cool the brine flow easily within the flexible tube. That is, since cold water of about 0 ° C. is always present around the coil, the cold stored in the ice can be efficiently extracted and used effectively. Also,
Since natural convection is used, equipment for promoting convection is not required, and initial investment and operation costs are not generated. Also, maintenance and inspection are not required.

According to the second aspect of the present invention, a metal deicing auxiliary tool is attached to the lower end of a serpentine tube meandering vertically in the ice heat storage tank, and the length of the lower part of the deicing auxiliary tool is reduced. It is formed longer than or equal to the thickness of the ice formed around the coil, and the heat of the brine heated by the load device or heat exchanger helps not only the ice around the coil but also the de-icing. In addition to melting the ice in the vicinity of the ice cubes, a cylindrical ice-melting section, which is a layer of ice-melted water, is formed between the ice and the snake tube, and a melting hole is formed at the lower end of the ice to form a cylindrical ice-melting pipe. Part of water and water in the ice thermal storage tank. At this time, since the length of the lower part of the ice-melting aid provided at the lower end of the flexible tube is longer than or equal to the thickness of ice formed around the flexible tube, A melting hole is formed on the lower surface of the part. Here, when the blower is operated to blow air into the ice heat storage tank, the air enters from the melting hole on the lower surface of the lower end of the ice,
As the water rises in the cylindrical ice melting section, a difference occurs between the apparent specific gravity of the cold water in the cylindrical ice melting section and the specific gravity of the cold water in the ice thermal storage tank.
C. cold water is introduced from the melting hole on the lower surface side of the lower end of the ice and rises in the cylindrical ice melting part. Thus, the cold heat of the ice continues to cool the warm brine flowing through the serpentine via the cold water located inside the tubular ice melting section. In other words, the air can be blown out from the air pipe to forcibly discharge the warmed water in the cylindrical ice-melting section, so that the cylindrical ice-melting section can be reliably filled with cold water of about 0 ° C. The heated brine flowing in the pipe can be efficiently cooled.

According to the third aspect of the present invention, an air pipe is provided at the bottom of the ice heat storage tank, and a bubble collector having a substantially C-shaped vertical section is provided below the lower end of the flexible tube. Then, the air ejected from the air pipe is collected by the foam collecting device, passed through the melting hole formed on the lower surface side of the lower end portion of the flexible pipe, and can be surely guided into the cylindrical ice melting section.

Further, according to the fifth aspect of the present invention, an air pipe is provided at the bottom of the ice heat storage tank, and a metal foaming device having a substantially C-shaped vertical section is integrally provided below the lower end of the flexible tube. The metal foaming device is used as an ice-melting aid, and a melting hole is formed on the lower surface of the lower end of the flexible pipe. By passing through the above-mentioned melting hole formed on the lower surface side of the lower end portion, it is possible to surely guide the melting point into the cylindrical ice melting part.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a partially omitted form of a cooling and storage operation of an internal melting type ice heat storage device of the present invention.

FIG. 2 is an explanatory view showing a part of a cooling operation of the inner melting type ice heat storage device of FIG. 1 in a cooling operation, and a sectional view taken along a line CC of FIG.

3 is an explanatory view partially showing an embodiment of the cooling operation of modification of the inner melt-type ice thermal storage apparatus of FIG.

FIG. 4 is an explanatory view showing a partially omitted form of a cooling / cooling operation of another internal melting type ice heat storage device of the present invention.

5 is an explanatory view showing a part of a cooling operation of the internal melting type ice heat storage device of FIG. 4 in a cooling operation, and a sectional view taken along a line DD of FIG.

FIG. 6 is a graph showing a relationship between a cooling operation time and a brine temperature in a flexible tube in the internal melting type ice heat storage device of the present invention and a conventional internal melting type ice heat storage device.

FIG. 7 is an explanatory view showing an outline of a combined internal / external melting type ice heat storage device of the present invention.

FIG. 8 is an explanatory view showing an outline of another internal / external melting type ice heat storage device of the present invention.

FIG. 9 is a perspective view showing one embodiment of an ice-melting aid attached to the ice heat storage device of the present invention.

FIG. 10 is a perspective view showing another embodiment of the ice-melting aid.

FIG. 11 is a perspective view showing another embodiment of the ice-melting aid.

FIG. 12 is a perspective view showing another embodiment of the ice-melting aid.

FIG. 13 is a perspective view showing a further embodiment of the ice-melting aid.

FIG. 14 is an explanatory diagram of a flexible tube.

FIG. 15 is an explanatory view showing a partially omitted form of a cooling operation of an internal melting type ice heat storage device provided with a foam-collecting device of the present invention together with an ice-melting aid.

FIG. 16 is a view showing a state in which the foaming device of the present invention is made of metal, and a combined internal melting type and external melting type ice heat storage device integrally provided at the lower end portion of the flexible tube in place of the ice-melting aid during cooling operation. It is explanatory drawing which shows a partly abbreviate | omission of an aspect.

FIG. 17 is an explanatory view showing a partially omitted form of a cooling / cold storage operation of a combined internal / external melting type ice heat storage device in which the foam-collecting device of the present invention is provided together with an ice-melting auxiliary device.

18 is an explanatory view showing a partially omitted form of a cooling operation of the combined internal / external melting type ice heat storage device of FIG. 17;

FIG. 19 is an explanatory diagram showing an outline of a flow during a cooling / cooling operation and a cooling operation in a conventional internal melting type ice heat storage device.

FIG. 20 is an explanatory view showing a partially omitted ice-making state during a cooling / cooling operation in a conventional internal melting type ice heat storage device, and FIG.
FIG. 4 is a cross-sectional view taken along a line A.

FIG. 21 is an explanatory view partially showing a defrosting state during a cooling operation in a conventional internal melting type ice heat storage device, and BB thereof;
It is a line sectional view.

FIG. 22 is an explanatory diagram showing ice making and thawing patterns during the cooling / cooling operation and the cooling operation of the ice heat storage device shown in FIGS. 20 and 21.

FIG. 23 is an explanatory diagram showing an outline of a conventional ice heat storage device for both internal melting and external melting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ice heat storage apparatus 2 Serpentine pipe 3 Ice heat storage tank 4 Refrigerator 5, 5A, 5B heat exchanger 6 Load device 7 Brine circulation circuit 8 Brine pump 9A, 9B On-off valve 9C Bypass valve 10 Heat medium circulation circuit 11 Air pipe 11a Small Hole 12 Blower 13 Circulating circuit for chilled water 14 Chilled water pump 15 Heat medium pump 16A, 16B, 16C, 16D, 16E Electromagnetic on-off valve 17 Suction pipe 18 Return pipe 18a Nozzle 19 Foam collector 20 Ice-melting auxiliary tool Br brine Ic Ice Wa Serpentine pipe Water between the ice and ice H Melting hole Fo Air T

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keisaku Koga 9-17-104 Hiratadai, Ibaraki-shi, Osaka

Claims (6)

[Claims] An ice heat storage tank is provided with a meandering pipe meandering in a vertical direction, and brine cooled by a refrigerator is passed through the snake pipe to cool water stored in the ice heat storage tank. Ice is formed on the other hand, while the brine heated by the load device or the heat exchanger is passed through the coil, the brine in the coil is cooled by the ice formed around the coil, and the lower end of the coil is formed. A metal de-icing auxiliary tool is attached to the load, and at least a part of the length of the de-icing auxiliary tool is longer than or equal to the thickness of ice formed around the flexible tube, ice thermal storage apparatus characterized by brine heat warmed by the device or heat exchanger is to comb the deicing aid near the ice with melts from its inner side around the ice of the flexible tube. 2. A serpentine pipe meandering in the vertical direction is provided in an ice heat storage tank, and an air pipe having a number of small holes formed below the serpentine pipe is provided. To cool the water stored in the ice heat storage tank to form ice around the coil, while passing brine heated by a load device or a heat exchanger into the coil, and passing the brine in the coil into the coil. Cooling is performed by the ice formed around the air pipe, and air is blown out from a number of small holes of an air pipe located below the coiled pipe, and a metal melting aid is attached to a lower end of the coiled pipe. The length of the lower part of the ice-melting aid is longer than or equal to the thickness of ice formed around the coiled tube, and the heat of the brine heated by the load device or the heat exchanger is formed. The ice around the tube Melts the ice in the vicinity of the ice-melting aid, and guides the air ejected from the air pipe through the ice melting hole formed on the lower surface of the lower end of the coiled pipe into the interior of the ice. An ice heat storage device for forcibly raising cold water below the inside of the ice heat storage tank introduced into the ice heat storage tank. 3. An ice heat storage tank is provided with a meandering pipe meandering in the vertical direction, and an air pipe having a number of small holes formed below the meandering pipe is provided. To cool the water stored in the ice heat storage tank to form ice around the coil, while passing brine heated by a load device or a heat exchanger into the coil, and passing the brine in the coil into the coil. Cooling is performed by the ice formed around the air pipe, and air is blown out from a number of small holes of an air pipe located below the coiled pipe, and a metal melting aid is attached to a lower end of the coiled pipe. The length of the lower part of the ice-melting aid is longer than or equal to the thickness of the ice formed around the coiled tube, and the lower end of the coiled tube has a substantially C-shaped lower section. It annexed to Jo collecting foam member, the load device or heat exchanger The heat of the brine warmed by melting the ice around the bellows tube from the inside and melting the ice near the de-icing aid, further blowing out air from the air pipe and collecting the air by the foam collector An ice heat storage device for guiding the ice water from the ice melting hole formed on the lower surface of the lower end portion of the coil to the inside of the ice and forcibly raising the cold water in the ice heat storage tank introduced into the ice; . 4. The ice heat storage device according to claim 3, wherein the foam collecting device is hung from a lower end of the flexible tube. 5. An ice heat storage tank having a meandering pipe meandering vertically, an air pipe having a number of small holes formed below the meandering pipe, and a brine cooled by a refrigerator. To cool the water stored in the ice heat storage tank to form ice around the coil, while passing brine heated by a load device or a heat exchanger into the coil, and passing the brine in the coil into the coil. It is cooled by the ice formed around the air pipe, and air is blown out from a number of small holes of the air pipe located below the flexible pipe. Are integrally connected to each other to serve as a deicing aid, and the length of the lower part of the foam collector is longer than or equal to the thickness of ice formed around the flexible tube. Formed and warmed by a load or heat exchanger The heat of the brine melts the ice around the flexible tube from the inside and melts the ice near the foam collecting device, and further ejects air from the air pipe, collects the air by the foam collecting device, and lowers the lower end of the flexible tube. An ice heat storage device, wherein the ice heat storage device is guided from the ice melting hole formed on the lower surface side to the inside of the ice to forcibly raise cold water below the inside of the ice heat storage tank introduced into the ice. 6. The cooling water outside the ice formed around the serpentine tube in the ice heat storage tank is guided to a load device or a heat exchanger and then returned to the ice heat storage tank again. The ice heat storage device according to any one of claims 1 to 5, wherein