JPH0518564A - Ice heat accumulator - Google Patents

Abstract

PURPOSE:To prevent clogging of a circulation passage and advancement of freezing to the upstream side. CONSTITUTION:A bypass passage 6 is provided in a return passage 4B. A dissolving heat exchanger 7 is interposed in the bypass passage 6. The dissolving heat exchanger 7 is driven by a subcooling dissolving means 10. A heat source is constituted of a refrigerant circuit 11, two threeway turnover valves 14 and 15, a seed ice generating means 22 and a seed supplying means 23. In this instance, the seed ice generating means 22 switches the three-way turnover valves, so that refrigerant flows from the dissolving heat exchanger to a capillary tube 19, whereby seed ice is generated. When volume of the seed ice generated reaches a prescribed value, the seed ice supplying means switches the three-way valves, so that the refrigerant flows from the capillary tube to the dissolving heat exchanger. Then the seed ice melts, peels off, flows through the bypass passage to the downstream side, whereby ice is generated in a cold accumulating material W in the return passage.

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 measures for preventing freezing and preventing freezing progress to the upstream side.

[0002]

2. Description of the Related Art In recent years, heat storage air-conditioning systems have been used for relatively large-scale air-conditioning systems in industrial plants and buildings. A heat storage air conditioning system has a dynamic system that uses ice to store cold heat and produces ice without adhering it to the cooling surface. One of these systems is a supercooling control type ice heat storage device. There is.

In this supercooling control type ice heat storage device, a circulation path for circulating the cold storage material of the ice storage tank is provided between the heat exchanger connected to the cooling device and the ice storage tank, and the ice heat storage device stores the heat. After cooling the cold storage material in the ice tank, the supercooled state is eliminated and the slurry
It is like ice.

A structure for eliminating the supercooled state is, for example,
As disclosed in Japanese Unexamined Patent Publication No. 63-217171, a gutter-shaped fluid passage is provided on an ice storage tank opened upward, and the cold storage material is circulated through the circulation passage through the fluid passage. ,
After supercooling during distribution, impact the regenerator material near the outlet,
In some cases, this causes the supercooled state to be eliminated and ice to be deposited, which then flows into the ice storage tank.

The supercooled state is unstable, and even a slight stimulus initiates icing. Therefore, in the above-described supercooling control type ice heat storage device, in order to prevent the blockage of the pipeline, the cool storage material is always supercooled immediately before the outlet of the circulation path or outside the circulation path, and the supercooling state is canceled. I have to. Therefore, the subcooling elimination portion and the heat exchanger are arranged close to the ice storage tank.

[0006]

However, in the above apparatus, since the supercooled state is eliminated after the circulation path is exited, the installation position of the subcooling elimination section and the heat exchanger is limited to the vicinity of the ice storage tank. Therefore, there is a problem that the degree of freedom in design is small.

Therefore, it is conceivable to try to remove the supercooled state in the middle of the circulation path to generate ice and send the cold storage material to the ice storage tank while keeping it in a flowable state. In this case, there is a problem that ice adheres to the pipe wall during transportation to form an ice accretion layer, and if the ice accretion layer becomes thicker, the pipe channel is blocked and freezing progresses further upstream. For example, when the supercooled state is eliminated by cooling the supercooled temperature, the ice tends to adhere to the cooling surface and coarsen, and the cooling surface closes the pipeline and the heat exchanger for supercooling generation. There was a situation in which the freeze progressed until.

The present invention has been made in view of the above point, and an object thereof is to prevent the blockage of the pipeline and the freezing progress to the upstream side.

[0009]

Means for Solving the Problems In order to achieve the above object, the means of the invention according to claim 1 is that a heat source section produces seed ice in a bypass passage and distributes it to the main circulation passage. It is designed to eliminate the supercooled state in the circulation path.

Specifically, the ice heat storage device is an ice storage tank (2) for storing the cold storage material (W) that has been frozen into a slurry.
And a cooling means (3) for supercooling the regenerator material (W) are sequentially connected by a circulation path (4) so that the regenerator material can circulate. A circulation path (4) downstream of the cooling means (3) is provided with a bypass path (6) that branches from the circulation path (4) and then joins again, while the cooling means (3) is used. A supercooling elimination means (10) for eliminating the supercooled state of the supercooled regenerator material (W) is provided.

In the supercooling elimination means (10), an expansion mechanism (19) and a elimination heat exchanger (7) provided in the bypass passage (6) for eliminating the supercooling state are provided for the refrigerant. A refrigerant circuit (11) is provided between the high pressure side and the low pressure side so that the refrigerant can flow therethrough. A switching mechanism (A) is provided for switching the flow direction of the refrigerant from the high pressure side to the low pressure side with respect to the expansion mechanism (19) and the elimination heat exchanger (7). Further, the switching mechanism (A) is operated to switch so that the refrigerant from the high pressure side flows into the expansion mechanism (19) and flows out from the elimination heat exchanger (7) to the low pressure side. Seed ice production operation means (22) is provided which operates (7) as a cooler to produce seed ice. Moreover, when the amount of seed ice adhering to the elimination heat exchanger (7) reaches a predetermined amount, the refrigerant from the high pressure side flows into the elimination heat exchanger (7) and the expansion mechanism (19) lower pressure side. The switching mechanism (A) is switched so as to flow out to the above, and the heat exchanger for elimination (7) is operated as a heater to melt and separate the seed ice and circulate it to the circulation path (4) on the downstream side. Seed ice supply operation means (23) is provided.

According to a second aspect of the present invention, a plurality of branch passages are provided in a circulation passage, a heat exchanger for elimination is arranged in each branch passage, and a heat source portion is sandwiched by an expansion mechanism. A heat exchanger for elimination is arranged downstream, so that one branch cools while one heats it, and one ice storage system produces ice while the frozen branch freezes. Is to melt.

Specifically, an ice storage tank (2) for storing the cold storage material (W) iced into a slurry, and a cooling means (3) for supercooling the cold storage material (W). In this order, the regenerator material (W) is circulated through the circulation path (4). In the circulation path (4) downstream of the cooling means (3), a plurality of branch paths (31) and (32) are formed to branch the circulation path (4) and join again. A supercooling elimination means (10) for eliminating the supercooled state of the regenerator material (W) supercooled by the means (3) is provided.

The supercooling eliminating means (10) has a first heat exchanger (3) for eliminating supercooling in at least one branch passage (31).
4) is provided, and the second heat exchanger (35) for eliminating supercooling is provided in the other branch passage (32).

On the other hand, in the supercooling elimination means (10), the first heat exchanger (34), the expansion mechanism (19), and the second heat exchanger (35) include a high pressure side and a low pressure side of the refrigerant. The first heat exchanger (3
4) or the second heat exchanger (35) is provided with a refrigerant circuit (11) connected to operate as a cooler and the other as a heater. And the first
A switching mechanism (A) for switching the flowing direction of the refrigerant from the high pressure side to the low pressure side with respect to the heat exchanger (34), the expansion mechanism (19) and the second heat exchanger (35) is provided. Moreover, the switching mechanism (A) is arranged so that the refrigerant from the high pressure side flows in from one of the first heat exchanger (34) and the second heat exchanger (35) and flows out from the other side to the low pressure side. When one side is operated as a heater and the other side is operated as a cooler, and a predetermined amount of ice adheres to the first heat exchanger (34) or the second heat exchanger (35) that operates as the cooler, the high pressure side The operation switching means (37) for switching the switching mechanism (A) so as to reverse the flow direction of the refrigerant flowing from the low pressure side to the low pressure side is provided.

[0016]

With the above construction, according to the invention of claim 1, the regenerator material (W) supercooled by the cooling means (3) flows through the circulation path (4) and also into the bypass path (6). It flows in and passes through the elimination heat exchanger (7).

On the other hand, the seed ice production operating means (22) switches the switching mechanism (A) so that the refrigerant flows from the expansion mechanism (19) to the elimination heat exchanger (7), and the elimination heat exchanger is changed. (7) acts as a cooler to attach and generate seed ice. Then, when the seed ice reaches a predetermined amount, the seed ice supply operating means (23) switches the switching mechanism (A) so that the refrigerant flows from the elimination heat exchanger (7) to the expansion mechanism (19),
The elimination heat exchanger (7) acts as a heater. The seed ice melts and separates, flows from the bypass path (6) to the circulation path (4) on the downstream side, and ices the cold storage material (W) in the circulation path (4). Therefore, ice is generated in the middle of the circulation path (4) without directly cooling the circulation path (4).

According to the second aspect of the present invention, the first heat exchanger (34) or the second heat exchanger (35) is arranged in each of the branch passages (31) and (32), and cooling is performed. Means (3)
The regenerator material (W) supercooled by the
After flowing through the first heat exchanger (34) or the second heat exchanger (35) of 1) and (32), they join the circulation path (4) again.

On the other hand, in the supercooling elimination means (10), the refrigerant flows through the first heat exchanger (34) and the second heat exchanger (35), and the operation switching means (37) operates the switching mechanism (A). By operating, the heat exchanger on the upstream side of the first heat exchanger (34) or the second heat exchanger (35) in the flow direction of the refrigerant operates as a heater, and the downstream side operates as a cooler. .

When a predetermined amount of ice adheres to the first heat exchanger (34) or the second heat exchanger (35) that operates as a cooler, the operation switching means (37) activates the switching mechanism (A). Upon switching operation, the heat exchanger that was the heater switches to the cooler, and the heat exchanger that was the cooler switches to the heater. That is, the operation of the first heat exchanger (34) or the second heat exchanger (35) is switched to the heater and the cooler. In the heat exchanger switched to the heater, the ice adhered during cooling is melted and separated, while the heat exchanger switched to the cooler produces ice. Therefore, while ice is always generated, there are some branch roads (31), (32).
Since the cold storage material (W) circulates in any of the branch passages (31) and (32) even if the valve is closed, the circulation passage (4) and the entire device are not closed.

[0021]

According to the invention of claim 1, the circulation path (4), which is the main stream, is not directly cooled, but seed ice is generated in the heat exchanger (7) for elimination of the bypass path (6), Since this is melted and separated and is circulated in the circulation path (4) on the downstream side, it is possible to prevent the circulation path (4) from being blocked and the freezing to the heat exchanger for producing subcooling to be prevented. As a result, the cool storage material (W) can be sent to the ice storage tank (2) while the supercooled state is eliminated in the middle of the circulation path (4) and the fluid-like slurry is maintained, and the design is free. The degree can be increased.

According to the second aspect of the present invention, since the switching heat exchanger (7) can be alternately switched between the heater and the cooler by the switching mechanism (A), it can be operated as a cooler. If ice accretion grows, it can be switched to a heater, and it is possible to prevent clogging of the branch passages (31) and (32) and freezing progress to the heat exchanger for subcooling generation, and thus, design flexibility. Can be increased.

Further, since the first heat exchanger and the second heat exchanger are connected in series, the refrigerant used for heating one heat exchanger is used for cooling the other heat exchanger to generate heat. It can be effectively used and energy can be saved. Furthermore, since the cool storage material (W) is divided into the respective branch paths (31) and (32) to eliminate the supercooled state, it is possible to reliably generate ice.

Furthermore, the operation switching means (37) detects the amount of icing and switches the operation of the heat exchanger for elimination (7) from the cooler to the heater, so that the pipe line is closed accurately and surely. Can be prevented.

[0025]

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

FIG. 1 shows the configuration of the ice heat storage device of the first embodiment of the invention according to claim 1. The ice heat storage device (1) is provided with an ice storage tank (2) for storing the cold storage material (W) that has been iced in a slurry form, and the ice storage tank (2) and a supercooling generation device as a cooling means. A circulation path (4) is connected to the heat exchanger (3) so that the regenerator material (W) can circulate. The circulation path (4) is connected with a forward passage (4A) for supplying the cold storage material (W) from the bottom of the ice storage tank (2) to the supercooling generation heat exchanger (3), and the supercooling generation heat exchange. It consists of a return conduit (4B) for returning the cold storage material (W), which has become ice in the form of slurry, from the container (3) to the upper part of the ice storage tank (2), and the forward conduit (4A).
The cold storage material (W) in the ice storage tank (2) is forcedly circulated in the circulation path (4) by the pump (5) provided in the.

As a cooling method of the heat exchanger (3) for producing subcooling, a direct expansion type in which the cold storage material (W) is directly cooled by a refrigerant, or a cold storage material (W) by cooled brine is used.
It may be any of indirect expansion type that indirectly cools. Water or an aqueous solution is used as the cold storage material (W).

Further, a bypass line (6) is attached to the return conduit (4B) downstream of the subcooling generation heat exchanger (3), while the subcooling generation heat exchanger (3) is used. A supercooling elimination means (10) for eliminating a supercooled state of the cooled regenerator material (W) is provided.

The bypass passage (6) returns the refrigerant to the return pipe (4).
It branches from B) and returns to the return conduit (4B) again. The bypass passage (6) is provided with a elimination heat exchanger (7) for eliminating the supercooled state of the regenerator material (W) supercooled by the subcooling generation heat exchanger (3).

Next, as a feature of the present invention, the subcooling elimination means (10) includes a refrigerant circuit (11) and a first three-way switching valve (14) and a second three-way switching valve as a switching mechanism (A). And is configured. As shown in Figure 1,
Both ends of the refrigerant circuit (11) are connected via a first three-way switching valve (14) and a second three-way switching valve (15) to a condenser (not shown).
High pressure liquid line (16) and compressor (not shown) downstream of the
Is connected to the suction line (17) connected to the suction port of, and a heat exchanger (7) for elimination and a capillary tube (expansion mechanism) between the high pressure liquid line (16) and the suction line (17). 19) is connected to the refrigerant pipe so that the refrigerant can flow therethrough. Then, the first three-way switching valve (14) and the second three-way switching valve (15) are interlocked with each other, and the high pressure liquid line (1
It is configured to switch the flow direction of the refrigerant from 6) to the suction line (17). That is, when the first three-way switching valve (14) introduces the refrigerant from the high-pressure liquid line (16) into the capillary tube (19), the second three-way switching valve (15) causes the refrigerant elimination heat exchanger ( Operates from 7) to the suction line (17). On the other hand, when the second three-way switching valve (15) is introducing the refrigerant from the high-pressure liquid line (16) to the heat exchanger for elimination (7), the first three-way switching valve (14) causes the refrigerant to flow into the capillary tube ( 19) to act as an outflow into the suction line (17).

Further, the seed ice production operating means (22) and the seed ice supply operating means (2) constituting the supercooling elimination means (10).
3) and are incorporated in the controller (25). The seed ice production operating means (22) connects both the first three-way switching valve (14) and the second three-way switching valve (15) to the high pressure liquid line (1).
The refrigerant from 6) is switched so that the refrigerant flows into the capillary tube (19) and flows out from the elimination heat exchanger (7) to the suction line (17), and the elimination heat exchanger (7).
Is operated as a cooler to generate seed ice.

When the amount of seed ice adhering to the heat exchanger (7) for elimination reaches a predetermined amount, the seed ice supply operation means (23) operates the first three-way switching valve (14) and the second three-way switching valve (15). The both sides are switched so that the refrigerant from the high pressure liquid line (16) flows into the elimination heat exchanger (7) and flows out from the capillary tube (19) to the suction line (17), and the elimination heat exchanger described above. (7) is operated as a heater so that the seed ice is melted and separated, and is circulated to the downstream return path (4B). Whether or not the amount of seed ice has reached a predetermined amount is detected by detecting a change in temperature of the cooling surface of the elimination heat exchanger (7) or a change in pressure loss due to an increase in resistance of the refrigerant flow. .

Next, the operation of the supercooling elimination means (10) will be described.

During operation of the ice heat storage device (1), the regenerator material (W) supercooled by the subcooling generation heat exchanger (3) flows through the downstream return path (4B) and also bypasses. It flows into the channel (6) and passes through the elimination heat exchanger (7).

On the other hand, in the subcooling elimination means (10) for operating the elimination heat exchanger (7), the seed ice generation operation means (2)
2), so that the refrigerant flows from the capillary tube (19) to the elimination heat exchanger (7).
4) and the second three-way switching valve (15) are switched to operate, and the heat exchanger for elimination (7) acts as a cooler to deposit and generate seed ice. Then, when the seed ice reaches a predetermined amount, the seed ice supply operating means (23) causes the refrigerant to flow from the elimination heat exchanger (7) to the capillary tube (19) and the first three-way switching valve (14) and The second three-way switching valve (15) is switched to operate, and the elimination heat exchanger (7) acts as a heater. The seed ice melts and separates, flows from the bypass path (6) to the downstream return path (4B), and ices the cold storage material (W) in the return path (4B).

According to this embodiment, the mainstream return path (4
B) is not directly cooled but seed ice is generated by the heat exchanger (7) for elimination of the bypass passage (6), and the seed ice is melted and separated and circulated to the downstream return passage (4B). It is possible to prevent blockage of the main return path (4B) and progress of freezing to the supercooling generation heat exchanger. As a result, the return route (4B)
In the middle of, the cold storage material (W) can be sent to the ice storage tank (2) while the supercooled state is eliminated and the slurry is kept in a flowable slurry state, and the degree of freedom in design can be increased.

Next, FIG. 2 shows a second embodiment of the invention according to claim 2. In this embodiment, the refrigerant circuit of the supercooling elimination means (10) has a elimination heat exchanger (7) arranged on both sides of a capillary tube (19), and the elimination heat exchanger is provided in a certain branch passage. Is operated as a cooler, while the heat exchanger for elimination provided in a certain branch is operated as a heater so that ice production and thawing of the frozen branch (32) can be performed simultaneously by one ice heat storage system. It was made possible.

Specifically, the heat exchanger (3) for supercooling generation
The return conduit (4B) on the further downstream side has two first branch paths (31) and a second branch path (31) where the return conduit (4B) branches and merges again.
A branch passage (32) is provided, and a supercooling elimination means (10) for eliminating a supercooled state of the regenerator material (W) supercooled by the subcooling heat exchanger (3) is provided. .

As in the first embodiment, the subcooling elimination means (10) includes a refrigerant circuit (11), a first three-way switching valve (14) as a switching mechanism (A) and a second three-way switching valve ( 1
5) and are comprised. Then, the refrigerant circuit (1
The inside of 1) is connected to the high pressure liquid line (16) and the suction line (17) through the first three-way switching valve (14) and the second three-way switching valve (15). In addition, the refrigerant circuit (1
A first heat exchanger (34) having a heat exchanger (7) for elimination in the first branch passage (31) between both ends of 1);
Capillary tube (19) and second branch (32)
The second heat exchanger (35) in which the elimination heat exchanger (7) is interposed is connected in order through the refrigerant pipe so that the refrigerant can flow.

Further, the operation switching means (37) constituting the supercooling elimination means (10) is built in the controller (25).

The operation switching means (37) includes a first three-way switching valve (14) and a second three-way switching valve (15), and the refrigerant from the high pressure side is either the first heat exchanger (34) or the second heat exchanger. (3
5) One side is operated as a heater and the other side is operated as a cooler so that it flows in from one side and flows out from the other side to the low pressure side. Further, when the amount of ice attached to the first heat exchanger (34) or the second heat exchanger (35) that operates as the cooler reaches a predetermined amount, the flow direction of the refrigerant from the high pressure side to the low pressure side is reversed. Thus, the switching mechanism (A) is configured to be switched.

Therefore, in the ice producing operation of the present embodiment, the heat exchanger for elimination (7) is arranged in each of the branch passages (31) and (32), and the heat exchanger for producing subcooling ( The regenerator material (W) supercooled by 3) flows through the elimination heat exchanger (7) of each of the branch passages (31) and (32), and then joins the return conduit (4B) again. On the other hand, the elimination heat exchanger (7) is incorporated in the refrigerant circuit (11) as the first heat exchanger (34) or the second heat exchanger (35), and the refrigerant flows therethrough.

Then, the operation switching means (37) actuates the first three-way switching valve (14) and the second three-way switching valve (15), so that the first heat exchanger (34) or the second heat exchanger ( In 35), the heat exchanger on the upstream side in the flow direction of the refrigerant operates as a heater and the downstream side operates as a cooler.

Further, when the amount of ice adhering to the first heat exchanger (34) or the second heat exchanger (35) operating as a cooler reaches a predetermined amount, the operation switching means (37) causes the first three-way switching valve ( 14) and the second three-way switching valve (15) are switched to operate so that the heat exchanger that was the heater is switched to the cooler and the heat exchanger that is the cooler is switched to the heater. That is, the operation of the first heat exchanger (34) or the second heat exchanger (35) is switched to the heater and the cooler. In the heat exchanger switched to the heater, the ice adhered during cooling is melted and separated, while the heat exchanger switched to the cooler produces ice. Therefore, while ice is always generated, the cold storage material (W) circulates in any one of the branch paths (31) and (32) even if the branch paths (31) and (32) are closed. , The return path (4B) and the entire device are not blocked.

As a result, according to the present embodiment, the elimination heat exchangers (7) are alternately arranged as the heater and the cooler by the first three-way switching valve (14) and the second three-way switching valve (15). When the ice accretion grows in the heat exchanger that is operating as a cooler, it can be switched to a heater, and the branch passages (31) and (32) can be closed and the supercooling heat exchanger ( It is possible to prevent the freezing to 3) and to increase the degree of freedom in design.

Further, since the first heat exchanger (34) and the second heat exchanger (35) are connected in series, the refrigerant used for heating one heat exchanger is used for the other heat exchanger. It can be used for cooling to make effective use of heat and energy can be saved. Furthermore, since the cold storage material (W) is divided into small amounts in the respective branch paths (31) and (32) to eliminate the supercooled state, it is possible to reliably generate ice.

Furthermore, since the operation switching means (37) detects the amount of ice accretion and switches the operation of the heat exchanger for elimination (7) from the cooler to the heater, the pipe line is blocked appropriately and surely. Can be prevented.

Next, a third embodiment of the invention according to claim 2 will be described. In this embodiment, as the switching mechanism (A), a four-way switching valve is used instead of the three-way switching valve.

FIG. 3 shows an example in which the refrigerant circuit (11) of the second embodiment is used and a four-way switching valve is arranged in it. In this case, both ends of the refrigerant circuit (11) are connected to the high-pressure liquid line (16) and the suction line (17) via the four-way switching valve (40), and the four-way switching valve (40) is a high-pressure refrigerant. Is the first
When it is introduced into the heat exchanger (34), it is switched to the solid line side in the figure, and when it is introduced into the second heat exchanger (35), it is switched to the broken line side in the figure.

According to this embodiment, one four-way switching valve (4
It is possible to switch the refrigerant circulation direction of the refrigerant circuit (11) in 0), and it is possible to reduce the cost and simplify the piping.

The heat exchanger for elimination (7) of the first embodiment.
May be plural.

Further, the number of branch passages of the second embodiment may be three or more, and the first heat exchanger (34) and the second heat exchanger (34) of the second embodiment may be provided.
There may be a plurality of heat exchangers (35).

Further, the refrigerant circuit (11) may be an independent refrigerant piping system having a high pressure liquid line (16), a suction line (17) and a compressor, which is a closed circuit.

The expansion mechanism may be an electric expansion valve.

The seed ice supply operation means (2) of the first embodiment is also used.
3) and the operation switching means (37) of the second embodiment, the detection of a predetermined amount of seed ice or the detection of ice accretion can be performed by using a timer after the predetermined separation time has elapsed. It is also possible to output the detection signal by judging that the detection signal is output.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of an ice heat storage device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of an ice heat storage device according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram showing a configuration of an ice heat storage device, showing a third embodiment according to the present invention.

[Explanation of symbols]

2 ice storage tanks 3 Cooling means 4 circuit 6 Bypass road 7 Dissipating heat exchanger 10 heat source 11 Refrigerant circuit 14 First three-way switching valve (switching mechanism) 15 Second three-way switching valve (switching mechanism) 19 Capillary tube (expansion mechanism) 22 Seed ice generation operation means 23 seed ice supply operation means 31 First branch road (branch road) 32 Second branch road (branch road) 34 First heat exchanger 35 Second heat exchanger 37 Operation switching means 40 4-way switching valve (switching mechanism) A switching mechanism W cold storage material

Claims (2)

[Claims] 1. A circulation path in which an ice storage tank (2) for storing the cold storage material (W) iced into a slurry and a cooling means (3) for supercooling the cold storage material (W) are sequentially provided. The cool storage material is circulated by (4), and a bypass passage (6) branched from the circulation passage (4) and then joined again is connected to the circulation passage (4) downstream of the cooling means (3). On the other hand, a supercooling elimination means (10) for eliminating a supercooled state of the regenerator material (W) supercooled by the cooling means (3) is provided, and the supercooling elimination means (10) is an expansion mechanism. (19) and a heat exchanger for elimination (7) provided in the bypass passage (6) for eliminating a supercooled state are connected between the high pressure side and the low pressure side of the refrigerant so that the refrigerant can flow. High pressure to the refrigerant circuit (11) formed by the above, the expansion mechanism (19) and the heat exchanger (7) for elimination. From the switching mechanism (A) that switches the flow direction of the refrigerant flowing from the low pressure side to the low pressure side, the refrigerant from the high pressure side flows into the expansion mechanism (19) and flows out from the elimination heat exchanger (7) to the low pressure side. Seed ice production operation means (22) for producing a seed ice by switching the switching mechanism (A) to operate the elimination heat exchanger (7) as a cooler, and the elimination heat exchanger (7). When the amount of seed ice adhering to is a predetermined amount, the switching mechanism (A) is operated so that the refrigerant from the high pressure side flows into the elimination heat exchanger (7) and flows out from the expansion mechanism (19) to the low pressure side. And a seed ice supply operation means (23) for switching and operating the elimination heat exchanger (7) as a heater to melt and separate the seed ice and circulate it to the circulation path (4) on the downstream side. An ice heat storage device characterized by being configured. 2. An ice storage tank (2) for storing the cold storage material (W) iced into a slurry and a cooling means (3) for supercooling the cold storage material (W) are circulated in sequence. A regenerator material (W) is circulatory connected by a passage (4), and a plurality of circulation passages (4) branching from the cooling means (3) and rejoining the circulation passage (4). Fork road (3
1) and (32) are formed, a supercooling elimination means (10) for eliminating the supercooled state of the regenerator material (W) supercooled by the cooling means (3) is provided. In the means (10), at least one branch passage (31) is provided with a first heat exchanger (34) for eliminating supercooling, and another branch passage (32) is provided with a second heat exchanger for eliminating supercooling. (35) is provided, while the first heat exchanger (34), the expansion mechanism (19), and the second heat exchanger (35) are arranged between the high-pressure side and the low-pressure side of the refrigerant. A refrigerant circuit (11) connected so that it can flow, and one of the first heat exchanger (34) and the second heat exchanger (35) is connected so as to operate as a cooler and the other as a heater. And the high pressure side with respect to the first heat exchanger (34), the expansion mechanism (19) and the second heat exchanger (35). From the high pressure side to the switching mechanism (A) for switching the flow direction of the refrigerant flowing from the high pressure side to the low pressure side of the first heat exchanger (34) or the second heat exchanger (35). A first heat exchanger (34) or a second heat exchanger that operates as one heater and the other as a cooler such that one flows in from one side and flows out to the low pressure side from the other, and also operates as the cooler. When the amount of ice adhering to (35) reaches a predetermined amount, the operation switching means (37) for switching the switching mechanism (A) so as to reverse the flow direction of the refrigerant flowing from the high pressure side to the low pressure side.
An ice heat storage device comprising: