JP3422288B2 - Ice storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static type ice heat storage device, and more particularly to a measure for improving cold heat extraction performance.

[0002]

2. Description of the Related Art Heretofore, there has been known an ice heat storage device which cools and freezes a heat storage medium such as water stored in a heat storage tank to store cold heat as latent heat of the heat storage medium. In recent years, ice storage devices
It is used in combination with an air conditioner. That is, while ice making is performed at night to store cold heat, cooling operation is performed by using the cold heat stored during daytime. With such an operation, the operation cost of the air conditioner is reduced by using the inexpensive late-night power, and the power demand is leveled at night and day.

As an ice heat storage device, Japanese Patent Laid-Open No. 7-3014
There is known a so-called static type which adopts the internal fusion method as disclosed in Japanese Patent No. 38. In this type of heat storage device, a heat storage medium such as water is stored in the heat storage tank, while a heat transfer tube is arranged in the heat storage tank. Then, at the time of ice making, the heat medium cooled by the refrigerator or the like is caused to flow through the heat transfer tube,
Freeze the heat storage medium in the heat storage tank. On the other hand, at the time of utilizing cold heat, the frozen heat storage medium, that is, the heat medium of the heat transfer tube is cooled by an iced substance, and the cooled heat medium is conveyed to an indoor heat exchanger or the like for cooling or the like.

[0004]

However, in the ice heat storage device as disclosed in the above publication, there is a problem that when the utilization operation for extracting the cold heat is continued, the cold heat extracting performance sharply decreases. Hereinafter, this problem will be described.

First, at the time of storing heat for storing cold heat, since the cooled heat medium is flown through the heat transfer tube to make ice, the heat storage medium is frozen around the heat transfer tube. On the other hand, when using cold heat, the heat medium flows through the heat transfer tube to exchange heat with the heat storage medium, so that the heat storage medium melts from around the heat transfer tube. Therefore, at the beginning of the utilization operation, the iced substance and the heat transfer tube are in contact with each other, and the heat medium in the heat transfer tube exchanges heat with the iced substance via only the heat transfer tube.

[0006] On the other hand, when the utilization operation progresses, the iced material around the heat transfer tube melts to form a gap between the heat transfer tube and the iced material, and the heat medium in the heat transfer tube is a heat transfer medium in the liquid phase and the liquid phase. Must exchange heat with the glides via both. Also,
When a gap is formed between the heat transfer tube and the iced substance, heat transfer between the heat transfer pipe and the iced substance is performed by natural convection of the liquid phase heat storage medium existing in the gap. For this reason, the amount of heat exchange between the heat medium in the heat transfer tube and the iced substance is reduced, and the cold heat extraction performance is deteriorated.

The present invention has been made in view of the above points, and an object of the present invention is to prevent a decrease in cold heat extraction performance during use of cold heat in an ice heat storage device.

[0008]

[Means for Solving the Problems] -Solution Means-The first solution means of the present invention is a heat storage tank (31) for storing a heat storage medium, and a heat transfer tank disposed inside the heat storage tank (31). The heat pipe (41) is provided, and the heat medium flowing through the heat transfer pipe (41) is used to store
Run the heat transfer tube (41) while cooling the heat medium to make ice.
The heat medium to be cooled is cooled with ice in the heat storage tank (31) to remove cold heat.
The target is the ice heat storage device that performs the operation of putting out . And a fixing member (60) for fixing the heat transfer tube (41) in the heat storage tank (31).
And the heat transfer tube (4) attached to the fixing member (60).
It is equipped with an air pipe (50) that supplies air to the vicinity of 1).
On the other hand, the heat transfer tube (41) has a straight straight tube section (42).
And the straight pipe part (42) is in a substantially vertical direction.
The air pipe (50) is provided to take out cold air from the air.
Sometimes to the gap (33) created between the heat transfer tube (41) and ice (32)
The straight pipe portion of the heat transfer pipe (41) flowing in and flowing inside the gap (33)
The straight pipe so that it flows along buoyancy along (42).
Air is supplied to the vicinity of the lower end of the portion (42) .

A second solving means devised by the present invention is the above first solving means, wherein the heat transfer pipe (41) is constituted by a crosslinked polyethylene pipe.

A third solving means devised by the present invention is the above first solving means, wherein the fixing member (60) is a heat transfer tube (4).
The straight pipe portion (42) of (1) is provided in a posture orthogonal to the straight pipe portion (42) so as to support the straight pipe portion (42).

[0011] A fourth solution provided by the present invention is a heat storage medium.
Inside the heat storage tank (31) that stores the body, and inside the heat storage tank (31)
It is equipped with a heat transfer tube (41) arranged and flows through the heat transfer tube (41).
The operation of making ice by cooling the heat storage medium with the heat medium
Cool the heat medium flowing through the pipe (41) with ice in the heat storage tank (31).
The ice heat storage device that performs the operation to take out cold heat by
There is. Then, in the heat storage tank (31), set the heat transfer tube (41)
The fixing member (60) to be fixed, and the fixing member (60)
Attached to supply air to the vicinity of the heat transfer tube (41).
While the pipe (50) is provided, the heat transfer pipe (41) is
The straight member (42) having a straight shape is provided, and the fixing member (60) is
The heat transfer tube (41) is installed in a posture orthogonal to the straight pipe section (42).
Is configured to support the straight pipe portion (42), and the air pipe (50) is provided along the fixing member (60) in contact with the straight pipe portion (42) of the heat transfer pipe (41). At the same time, a blowout hole (51) for blowing out air is formed in the air pipe (50) so as to correspond to the straight pipe portion (42).

A fifth means for solving the problems of the present invention is the above-mentioned means .
In the first and fourth solving means, the heat transfer tube (41) includes a plurality of straight pipe parts (42) and a semi-arcuate curved pipe part (43, 44) connecting the straight pipe parts (42). It has a meandering shape.

A sixth means for solving the problems according to the present invention is the above-mentioned means .
In the solution means of 3 , the air pipe (50) is provided in contact with the straight pipe portion (42) of the heat transfer pipe (41) along the fixing member (60), and the air pipe (50) is provided in the air pipe (50). A blowout hole (51) that opens downward and blows out air is formed corresponding to the straight pipe portion (42).

A seventh means for solving the problems of the present invention is the above-mentioned means .
In the solution means of 3 , the fixing member (60) includes a heat transfer tube (4
A plurality of air pipes (50) are provided in the longitudinal direction of the straight pipe part (42) of (1), and the air pipe (50) is provided in the fixing member (60) located at the lowest position.

The eighth means for solving the problems of the present invention is the above-mentioned means .
1st , 4th, 5th solution means WHEREIN: A fixing member (60)
Is formed in a plate shape, and a straight pipe portion (42) of the heat transfer pipe (41) is formed in a side portion of the fixing member (60) by cutting out in a circular arc shape from a side surface of the fixing member (60). Support hole (6
1) is formed.

A ninth solving means devised by the present invention is the above-mentioned fifth solving means, wherein the heat transfer tube (41) is formed such that the plurality of straight pipe portions (42) are located on the same plane. The heat storage tank (31) is provided with a plurality of heat transfer pipes (41) at predetermined intervals, while the fixing member (60) is formed in a plate shape, and the fixing member (60) is arranged between the heat transfer pipes (41) every other space. A support hole (61) is provided in both sides of the fixing member (60) in a circular arc shape from the side surface of the fixing member (60) and the straight pipe portion (42) fits into the straight pipe portion (61). 42) is formed corresponding to each of the heat transfer pipes (42) and is configured to support the straight pipe portions (42) of two adjacent heat transfer pipes (41).

The tenth means for solving the problems of the present invention is the above.
In the eighth and ninth solving means, in the support hole (61) of the fixing member (60), the opening width at the side surface of the fixing member (60) is larger than the diameter of the straight pipe portion (42) of the heat transfer pipe (41). It is formed so as to be slightly narrow.

The eleventh solution means taken by the present invention is as described above.
In the tenth solution means, one slit (62) extending from the side surface of the fixing member (60) in the width direction of the fixing member (60) is provided on each side of the support hole (61) of the fixing member (60). It is what is formed.

-Operation- In the first and fourth solving means, the heat medium cooled by the cold heat source such as the refrigerator is sent to the heat transfer tube (41) to perform ice making.
That is, the heat storage medium in the heat storage tank (31) is cooled by exchanging heat with the heat medium of the heat transfer tube (41), and the heat storage medium is frozen around the heat transfer tube (41) to produce an iced product. Then, when the cooling of the heat storage medium is continued, the iced product grows, and the cold heat from the cold heat source is stored in the heat storage tank (31) as latent heat of the heat storage medium.

When the stored cold heat is used, the heat medium is circulated through the heat transfer tube (41), and the heat medium is cooled by the iced product in the heat storage tank (31) to take out the cold heat. At that time, the heat transfer tube (4
The iced substance melts from around 1). Therefore, the molten heat storage medium is present between the heat transfer tube (41) and the iced substance, and the liquid phase heat storage medium hinders heat exchange between the iced substance (32) and the heat medium. On the other hand, in these solutions, air is supplied to the vicinity of the heat transfer pipe (41) by the air pipe (50). That is, air is sent into the liquid phase between the heat transfer tube (41) and the iced substance. Then, air flows in the liquid phase to generate forced convection, which promotes heat transfer between the iced matter (32) and the heat medium.

Further, in the first solution, the straight pipe portion (42)
The heat transfer tube (41) is installed so that the tube is in a substantially vertical posture. In this case, the air supplied by the air pipe (50) at the time of taking out the cold heat flows along the straight pipe portion (42) in the liquid phase between the heat transfer pipe (41) and the iced substance. That is, the supplied air flows upward due to buoyancy.

On the other hand, in the fourth solution means, the heat transfer tube (41)
The air pipe (50) is installed in contact with the straight pipe part (42), and the air is blown out from the blowout hole (51) formed in the air pipe (50). That is, the air is supplied to the vicinity of the straight pipe portion (42) of the heat transfer tube (41) by the air pipe (50) provided near the heat transfer tube (41).

In the second solving means, the heat transfer tube (41) is made of a crosslinked polyethylene tube. That is, the heat transfer tube (41)
Is made of a flexible material instead of a metal. The crosslinked polyethylene pipe may be a single layer made of only crosslinked polyethylene, or may be a double layer having a non-crosslinked layer provided on the outer peripheral portion.

In the third means for solving the problems, the fixing member (60)
Fixes the heat transfer tube (41) by supporting the straight tube section (42). Further, the fixing member (60) is arranged in a posture orthogonal to the straight pipe portion (42). Therefore, even if there are a plurality of straight pipe parts (42), each straight pipe part (42) is supported by one fixing member (60).

In the fifth solving means, the heat transfer tube (41) has a predetermined shape. That is, the heat transfer pipe (41) has a meandering shape in which the straight pipe portions (42) and the curved pipe portions (43, 44) are alternately and repeatedly formed.

In the sixth solution means, the air pipe (50) is installed so as to be in contact with the straight pipe portion (42) of the heat transfer pipe (41), and the blowout hole (formed in the air pipe (50) ( Air is blown out from 51). That is, the air is supplied to the vicinity of the straight pipe portion (42) of the heat transfer tube (41) by the air pipe (50) provided near the heat transfer tube (41).

Further, in the sixth means for solving the problems, the air pipe (50) is provided along the fixing member (60) which is orthogonal to the straight pipe portion (42) which is substantially vertical. That is,
The air pipe (50) is installed in a substantially horizontal posture. Then, the air pipe (50) in a substantially horizontal position has a blow-out hole (51).
Are formed so as to open downward. In addition, the blow-out hole (51) does not necessarily have to open downward, and may open downward.

In the seventh means for solving the problems, the air pipe (is attached to the lowermost fixing member (60) of the plurality of fixing members (60) for supporting the straight pipe portion (42) in a substantially vertical posture. Five
0) is provided. The air supplied by the air pipe (50) is
It is fed near the lower end of the straight pipe part (42). The sent air flows upward along the straight pipe portion (42). Therefore, the liquid phase between the straight pipe part (42) and the iced substance is
It is stirred for almost the entire length of 2).

In the eighth solution means, the support hole (61) is formed in the side portion of the plate-shaped fixing member (60). The straight pipe portion (42) of the heat transfer pipe (41) fits into the support hole (61) from the side of the fixing member (60). Then, by fitting the straight pipe portion (42) into the support hole (61) of the fixing member (60), the straight pipe portion (42) is supported and the heat transfer pipe (41) is fixed. Further, the straight pipe portion (4) is provided in the support hole (61) of the fixing member (60).
2) While is fitted, the fixing member (60) is a posture in which its extension direction is perpendicular to the longitudinal direction of the straight pipe portion (42).

In the ninth means, the heat transfer tube (41)
Has a shape in which a plurality of straight pipe portions (42) are located on the same plane. That is, the heat transfer tube (41) has a meandering shape on the same plane. The heat storage tank (31) houses a plurality of heat transfer tubes (41) formed in the above shape. Further, in the heat storage tank (31), a plurality of heat transfer tubes (41) are arranged at predetermined intervals.

On the other hand, the fixing member (60) is formed in a plate shape, and support holes (61) are formed on both sides of the fixing member (60). The fixing member (60) is provided every other space between the heat transfer tubes (41) arranged in the heat storage tank (31). Then, the heat transfer tubes (4
The straight pipe part (42) of 1) is the support hole (61) of the fixing member (60).
The heat transfer tube (41) is fixed by being fitted into the heat transfer tube.

In the tenth means for solving the above problems, the fixing member (6
The opening width of the support hole (61) on the side surface of (0) is
It is set somewhat narrower than the diameter of the straight pipe part (42) of 1).
Then, when the heat transfer pipe (41) is fitted into the support hole (61), the opening width of the support hole (61) is narrowed, so that the heat transfer pipe (41) does not come off from the straight pipe portion (42) and is sure. Supported by.

In the eleventh solving means, the fixing member (6
The slits (6) on both sides of the support hole (61)
2) is formed. The slit (62) facilitates deformation of the opening of the support hole (61) on the side surface of the fixing member (60). Therefore, compared with the case where the slit (62) is not provided, even if the opening width of the support hole (61) on the side surface of the fixing member (60) is set to be narrower, the supporting hole ( The heat transfer tube (41) is fitted into 61).

[0034]

According to each of the above means for solving the problems, the air pipe (50)
Air is supplied to the vicinity of the heat transfer tube (41) through. Therefore, even if the iced substance is melted around the heat transfer tube (41) by the flow of the supplied air, the liquid phase heat storage medium is stirred between the heat transfer tube (41) and the iced substance (32). Forced convection can occur. Therefore, even in the above-described state, it is possible to secure a sufficient amount of heat exchange between the iced substance and the heat medium in the heat transfer tube (41), and it is possible to maintain high cold heat extraction performance. Further, since the cold heat extraction performance can be maintained high, the following effects can be obtained.

First, since the cold heat extraction performance can be maintained high, the cold heat can be sufficiently extracted even when the amount of the frozen product (32) remaining in the heat storage tank (31) is small. For this reason, it is possible to avoid the problem that the cold heat cannot be taken out even if the frozen product (32) remains in the heat storage tank (31). Therefore, heat storage tank (31)
It is possible to utilize the cold heat stored in the exhaust gas without exhaustion and reduce energy loss due to residual ice.

Further, not only the peak shift operation but also the peak cut operation can be supported. here,
The peak shift operation is an operation in which the cold heat source such as the refrigerator is operated and the cold heat is taken out from the heat storage tank (31) at the same time to reduce the load of the refrigerator and the energy required for the operation. Therefore, during the peak shift operation, it is sufficient to take out the cold heat little by little over a long period of time, and the above conventional ice heat storage device can also be used. On the other hand, the peak cut operation is
This is an operation that uses only the cold heat stored by stopping the cold heat source such as a refrigerator. Therefore, during the peak cut operation, it is necessary to take out a large amount of cold heat in a short time, and the above-mentioned conventional one cannot cope with this.

On the other hand, according to the ice heat storage device of the present invention, it is possible to prevent the cold heat extraction capacity from being lowered during the utilization operation. Therefore, in the ice heat storage device, a sufficient amount of cold heat can be taken out per unit time, and the peak cut operation can be performed.

Further, in these solutions , the fixing member (60) and the air pipe (50) are integrally formed. Therefore, by installing the fixing member (60) for fixing the heat transfer tube (41), the air pipe (50) can be installed at the same time. Therefore, it is possible to simply maintain the assembly process while improving the cold heat extraction performance by the air supply described above.

In the first solving means, the straight pipe portion (42) of the heat transfer pipe (41) is in a substantially vertical posture. For this reason,
The air supplied to the vicinity of the heat transfer tube (41) through the air pipe (50) can be caused to flow by buoyancy. Therefore, it is not necessary to apply a driving force for causing the air to flow in the liquid phase between the heat transfer tube (41) and the iced substance, and the power consumption associated with the air supply can be reduced.

According to the second solving means, the heat transfer tube (4
1) can be configured to be soft and flexible. Here, the ice filling rate in the heat storage tank (31) (ice pack
When the ing factor (IPF) is set high, for example, 90
When it is set to be equal to or higher than%, the load due to the produced iced substance acts on the heat transfer tube (41). When the heat transfer tube (41) is made of metal, there is a great risk of causing troubles such as deformation and damage. On the other hand, in this solution , the heat transfer tube (4
Since 1) is composed of a cross-linked polyethylene pipe, it is possible to set the IPF to be high while avoiding troubles due to breakage of the heat transfer pipe (41).

According to the fourth and sixth solving means, since the air pipe (50) is arranged in contact with the heat transfer pipe (41), the blow hole (51) is formed in the air pipe (50). Air can be surely sent to the vicinity of the heat transfer tube (41) only by forming it. Therefore, the liquid phase between the heat transfer tube (41) and the iced matter can be surely stirred when the cold heat is taken out, and the heat exchange between the heat medium of the heat transfer tube (41) and the iced matter is promoted, so that the cold heat It is possible to surely improve the take-out performance.

Particularly, in the sixth solution means, the air outlet (51) is formed downward in the air pipe (50) in a substantially horizontal position. Therefore, even when the supply of air from the air pipe (50) is stopped, the blowout hole (51)
It is possible to suppress the amount of heat storage medium flowing into the air pipe (50) from the heat storage medium.

According to the seventh means for solving the problems, the air is supplied from the air pipe (50) provided only to the lowermost fixing member (60), and the straight pipe portion (42) is provided over substantially the entire length. The liquid phase between the straight pipe part (42) and the iced substance can be stirred. Therefore, it is possible to improve the cold heat extraction performance by reliably stirring the liquid phase while minimizing the number of air pipes (50).

According to the eighth to eleventh solving means, the straight pipe portion (42) is supported by the plate-shaped fixing member (60) having the predetermined supporting hole (61) to support the heat transfer pipe (41). Can be fixed. That is, the fixing member (60) that can reliably fix the heat transfer tube (41) can be realized with a simple configuration. In particular, according to the ninth solving means, when a plurality of heat transfer tubes (41) are provided in the heat storage tank (31), the two heat transfer tubes (41) can be fixed by one fixing member (60). it can. According to the tenth solution means, the heat transfer tube (41) can be reliably fixed by forming the support hole (61) into a predetermined shape. Further, according to the eleventh solution means, the opening width of the support hole (61) on the side surface of the fixing member (60) can be set narrower, and the heat transfer tube (41) can be fixed more reliably.

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the ice heat storage device (30) of this embodiment includes a circulation circuit (20) and a heat storage tank (31). The ice heat storage device (30) is of a static type and an internal melting type, and performs cold heat storage operation of freezing the water in the heat storage tank (31) to store cold heat. In addition, the above ice heat storage device (3
0) performs a heat storage operation in which water in the heat storage tank (31) is heated to store heat. On the other hand, the circulation circuit of the ice heat storage device (30) (2
A use side circuit (70) is connected to 0), and constitutes an air conditioner that performs air conditioning by using the stored cold heat or hot heat.

The circulation circuit (20) is a brilliantler (21).
The heat storage heat exchanger (40), the main heat exchanger (22), and the circulation pump (23) are sequentially connected by a brine pipe (24). The circulation circuit (20) is filled with brine as a heat medium. When the circulation pump (23) is operated, brine circulates in the circulation circuit (20).

In the circulation circuit (20), the main heat exchanger (2
A first bypass pipe (25) for bypassing 2) and a second bypass pipe (26) for bypassing the heat storage heat exchanger (40) are provided. One end of the first bypass pipe (25) is connected between the heat storage heat exchanger (40) and the main heat exchanger (22). The other end of the first bypass pipe (25) is connected to the main heat exchanger (22) and the circulation pump (23) via the first three-way valve (27).
Connected between. One end of the second bypass pipe (26) is connected between the brunchler (21) and the ice heat storage device (30). The other end of the second bypass pipe (26) is
It is connected between the ice heat storage device (30) and the main heat exchanger (22) via the second three-way valve (28).

Although not shown, the brunchler (21) has a refrigerant circuit. Refrigerant circulates in this refrigerant circuit, and the refrigeration cycle operation and the heat pump cycle operation are switched and performed. And brilliantler (21)
Is configured to switch between cooling of brine by refrigeration cycle operation in the refrigerant circuit and heating of brine by heat pump cycle operation.

The utilization side circuit (70) is a main heat exchanger (2
2), user side heat exchanger (71) and user side pump (72)
And are sequentially connected by piping. User side circuit (7
0) is filled with water, and when the use side pump (72) is operated, water circulates between the main heat exchanger (22) and the use side heat exchanger (71). Although not shown, the use side heat exchanger (71) is provided in a so-called fan coil unit and exchanges heat between water circulating in the use side circuit (70) and room air.
Further, the main heat exchanger (22) exchanges heat between the brine circulating in the circulation circuit (20) and the water circulating in the utilization side circuit (70).

As shown in FIGS. 2 and 3, the heat storage heat exchanger (40) is installed inside the heat storage tank (31). The heat storage tank (31) is formed in a rectangular parallelepiped shape, and stores water as a heat storage medium therein.

The heat storage heat exchanger (40) includes a plurality of heat transfer tubes (41). The heat transfer tube (41) has a straight straight tube portion (42) and a semi-arcuate curved tube portion (43, 44) alternately formed, and has a vertically meandering shape. Moreover, the straight pipe part (42) and the curved pipe parts (43, 44) of the heat transfer pipe (41) are formed so as to be located on the same plane, and the heat transfer pipe (41) meanders vertically in the plane. Has become. Curved pipe part (43,44)
Among them, the one located on the upper end side of the straight pipe part (42) is configured as the upper curved pipe part (43), and the one located on the lower end side is configured as the lower curved pipe part (44).

The heat transfer tube (41) is composed of a crosslinked polyethylene tube (JIS K 6769). Here, a cross-linked polyethylene pipe having a two-layer structure in which a non-cross-linked layer is formed around the cross-linked layer is used. In addition, you may use the crosslinked polyethylene pipe of the single layer structure formed only by the crosslinked layer.

The plurality of heat transfer tubes (41) are arranged at regular intervals such that their meandering planes face each other.
Each heat transfer tube (41) has one end connected to the inlet header (45) and the other end connected to the outlet header (46).

A fixing plate (60) as a fixing member is provided between every heat transfer tube (41) (see FIG. 4). This fixing plate (60) is a straight pipe part (4) of the heat transfer pipe (41).
Two pieces are provided at equal intervals in the longitudinal direction of 2). The fixed plate (60) has heat transfer tubes (41) located on both sides thereof.
Is configured to support the straight pipe portion (42). In other words, the two heat transfer tubes (41) by one fixed plate (60)
Is fixed. Further, an air pipe (50) is integrally attached to each of the fixed plates (60) installed at the lowest stage of the straight pipe portion (42) of the heat transfer pipe (41) of the fixed plates (60). . Details of the fixed plate (60) and the air pipe (50) will be described later.

A frame-shaped frame (47) is provided on both sides of the heat transfer tube (41) arranged as described above. The frame (47) includes the fixing plate (6
The end of (0) is attached and fixed.

The heat storage heat exchanger (40) is a heat storage tank (31).
Is placed inside the. In this state, the straight tube portion (42) of the heat transfer tube (41) of the heat storage heat exchanger (40) has a substantially vertical posture. Further, the heat storage heat exchanger (40) is installed inside the heat storage tank (31) so as to be submerged in water, but the upper curved pipe portion (43) of each heat transfer pipe (41) projects above the water surface. It is in a state.

Inlet header (45) of the heat storage heat exchanger (40)
Is connected to the brunchler (21) side, while the outlet header (46) is connected to the main heat exchanger (22) side.
The heat storage heat exchanger (40) is configured to exchange heat between the brine in the heat transfer tube (41) and the water in the heat storage tank (31). By this heat exchange, the water in the heat storage tank (31) is cooled and frozen around the heat transfer tube (41) to become ice (32).

Each air piping (5) of the heat storage heat exchanger (40)
An air supply pipe (53) is connected to each of (0). The air supply pipe (53) extends to the outside of the heat storage tank (31),
It is open to the air. An air pump (52) is provided in the air supply pipe (53), and the air supply pipe (53) is configured to take in air and supply it to each air pipe (50).

Next, the fixing plate (60) and the air pipe (5
The configuration of (0) will be described with reference to FIGS.

The fixed plate (60) is a heat storage heat exchanger (40).
Is formed in a plate shape having a predetermined width corresponding to the installation interval of each heat transfer tube (41). The fixed plate (60) is
The heat transfer tube (41), which is meandering vertically, is formed to have a predetermined length from the straight pipe portion (42) on one end side to the straight pipe portion (42) on the other end side.

As shown in FIG. 6, on both sides of the fixed plate (60), at positions corresponding to the straight pipe portions (42) of the heat transfer pipe (41),
A plurality of support holes (61) are formed. This support hole (6
1) is formed one by one corresponding to each straight pipe part (42). The support hole (61) is formed by cutting the fixed plate (60) in an arc shape from the side surface of the fixed plate (60). The diameter of the support hole (61) is set corresponding to the diameter of the straight pipe portion (42). The support hole (61) is formed such that the opening width on the side surface of the fixed plate (60) is slightly narrower than the diameter of the straight pipe portion (42). That is, the support hole (6
1) is formed so that the edge thereof has a C-shape that opens toward the side surface of the fixed plate (60).

As shown in FIGS. 4 and 5, the fixing plate (60)
The straight pipe part (42) of the heat transfer pipe (41) fits into the support hole (61) of the fixing plate (60) from the side. That is, the heat transfer tube (41) located on one side of the fixed plate (60) fits into the support hole (61) formed on one side of the fixed plate (60), and the fixed plate (60) is ), The heat transfer tube (41) located on the other side of the fixed plate (60) fits into the support hole (61) formed on the other side. Therefore, the fixed plate (60) supports the straight pipe portions (42) of the heat transfer pipes (41) located on both sides thereof,
The two heat transfer tubes (41) are fixed by one fixing plate (60).

Further, as described above, the support hole (61) is formed such that the opening width on the side surface of the fixed plate (60) is slightly narrower than the diameter of the straight pipe portion (42). Therefore, when the straight pipe portion (42) of the heat transfer pipe (41) is fitted into the support hole (61), it is caught by the opening portion of the support hole (61), and the support hole (61)
It does not come off. In the present embodiment, the heat transfer tube (41) is made of a cross-linked polyethylene tube, so that the heat transfer tube (41) bends to fit into the support hole (61).

As shown in FIGS. 4 and 5, the air pipes (50) are attached to the fixing plates (60) at the lowest stage one by one, and are integrally attached to the fixing plates (60). Incidentally, FIG.
The ice (32) around the heat transfer tube (41) melts and the heat transfer tube (4
It shows a state where a gap (33) is created between 1) and ice (32). The air pipe (50) is provided along the longitudinal direction of the fixed plate (60) over substantially the entire length of the fixed plate (60) (see FIG. 2). In addition, the air pipe (50) is fixed plate (6
0) so that it contacts the two heat transfer tubes (41) adjacent to
It has a predetermined diameter. Specifically, air piping (5
The diameter of 0) is set to a value obtained by subtracting the diameter of the straight pipe portion (42) from the arrangement pitch of the heat transfer pipes (41).

As shown in FIG. 4, in the air pipe (50),
A blowout hole (51) for blowing out air is formed. The blowout holes (51) are formed one by one corresponding to the straight pipe portions (42) of the heat transfer pipes (41). That is, the outlet hole (51) is
The heat transfer tubes (41) are formed not only on the front side in FIG. 4 but also on the back side. The blowout hole (51) is formed on the side surface of the lower half of the air pipe (50), and the air pipe (5
It is configured to open downward in (0).

The air pipe (50) is the air supply pipe (53).
The air sent from the blower is blown out from the blowout hole (51), and the air is supplied to the vicinity of the heat transfer tube (41). And the outlet (5
The air blown out from 1) is the heat transfer tube (41) and ice (32).
Flows into the gap (33) created between the heat transfer pipe (41) and the inside of the gap (33) along the straight pipe portion (42) of the heat transfer pipe (41) by buoyancy.

-Driving Operation- << Cold Heat Storage Operation >> The operation during the cold heat storage operation will be described. This cold heat storage operation is performed by operating the brunchler (21) with inexpensive late-night electric power at night when indoor cooling is not required. During this cold heat storage operation, the use-side pump (72) is stopped and water is not circulated in the use-side circuit (70). Further, during the cold heat storage operation, the air pump (52) is stopped and air is not supplied from the air pipe (50).

During the cold heat storage operation, the first three-way valve (27) shuts off the main heat exchanger (22) side so that the first bypass pipe (25) side is in communication, and the brine is connected to the main heat exchanger (22). ) To flow through the first bypass pipe (25). On the other hand, the second three-way valve (28) shuts off the second bypass pipe (26) side to communicate with the heat storage heat exchanger (40) side, and the brine flows through the heat storage heat exchanger (40). That is, in the circulation circuit (20), the brilliantler (21) and the heat storage heat exchanger (4
Brine circulates to and from 0).

In the brunchler (21), the brine is cooled by the refrigeration cycle operation of the refrigerant circuit. The brine cooled by the brunchler (21) flows into the inlet header (45) of the heat storage heat exchanger (40) and is distributed to the heat transfer tubes (41). The distributed brine flows in the heat transfer tube (41) and exchanges heat with the water in the heat storage tank (31). The water in the heat storage tank (31) is cooled and frozen by the low temperature brine, and ice (32) is generated and grows around the heat transfer tube (41). Then, the brine returns to the brilliant chiller (21) to be cooled, and is sent to the heat storage heat exchanger (40) again to repeat this circulation.

As described above, in the cold heat storage operation, ice making is performed by the cold heat generated by the blinchler (21). Therefore, the cold heat of the brunchler (21) is stored in the heat storage tank (31) as latent heat of water which is a heat storage medium. This cold heat storage operation is continued until the amount of ice (32) in the heat storage tank (31), that is, the amount of ice making reaches a predetermined value. The amount of ice making is
It is detected based on a change in the water level in the heat storage tank (31).

<< Used Cooling Operation >> The operation during the used cooling operation will be described. The utilization cooling operation is performed mainly for cooling the room during the daytime by using the cold heat stored in the cold heat storage operation. Further, as the utilization cooling operation, both the peak shift operation and the peak cut operation are performed.

During the peak shift operation, the cold heat stored in the cold heat storage operation is taken out, and at the same time, the brunchler (21) is also operated for cooling. In other words, in the peak shift operation, both the cold heat generated by the brunchler (21) and the cold heat stored in the heat storage tank (31) are used to cope with the cooling load. Therefore, the load on the brunchler (21) is reduced during the peak shift operation, and the power consumption corresponding to the use amount by the thawing is reduced to reduce the daytime power demand.

During peak shift operation, the first three-way valve (2
7) shuts off the side of the first bypass pipe (25) and the main heat exchanger (2
The 2) side is in communication, and the brine flows into the main heat exchanger (22). On the other hand, the second three-way valve (28) shuts off the second bypass pipe (26) side to communicate with the heat storage heat exchanger (40) side, and the brine flows through the heat storage heat exchanger (40). That is, in the circulation circuit (20), brine circulates in the order of the brunchler (21), the heat storage heat exchanger (40), and the main heat exchanger (22).

In the brilliantler (21), the brine is cooled by the refrigeration cycle operation of the refrigerant circuit. The temperature of the brine when it flows out from the brunchler (21) is set higher than that during the cold heat storage operation. The brine cooled by the brunchler (21) flows into the inlet header (45) of the heat storage heat exchanger (40) and is distributed to the heat transfer tubes (41). The distributed brine flows through the heat transfer tube (41), and during that time, it exchanges heat with the ice (32) in the heat storage tank (31) to be further cooled.

The brine cooled by the heat storage heat exchanger (40) flows into the main heat exchanger (22). In the main heat exchanger (22), the low temperature brine and the water in the use side circuit (70) exchange heat, and the water in the use side circuit (70) is cooled. The brine, which has absorbed heat in the main heat exchanger (22), is sent to the blasting chiler (21) again through the circulation pump (23) and repeats this circulation.

In the use side circuit (70), the main heat exchanger (22)
Water circulates between the heat exchanger (71) and the heat exchanger (71) on the use side. The water cooled in the main heat exchanger (22) flows into the use-side heat exchanger (71) to exchange heat with the indoor air, and the indoor air is cooled. The water that has absorbed heat from the indoor air is sent to the main heat exchanger (22) by the use side pump (72), and this circulation is repeated.

On the other hand, the peak cut operation is an operation in which the brilliantler (21) is stopped and only the cold heat stored in the heat storage tank (31) is used for cooling. Therefore, the power consumption of the brunchler (21) becomes zero during the peak cut operation, and the daytime power demand can be reduced.

Circulation circuit (20) during peak cut operation
At, the brine circulates as in the peak shift operation. At that time, the brunchler (21) is stopped, and the brine simply passes through the brunchler (21) and flows into the heat storage heat exchanger (40). The brine is cooled by exchanging heat with the ice (32) in the heat storage tank (31) while flowing through the heat storage heat exchanger (40). That is, the brine is cooled only in the heat storage heat exchanger (40). Only this point is different from the peak shift operation.

During the peak shift operation and the peak cut operation, the brine absorbed in the main heat exchanger (22) is sent to the heat storage heat exchanger (40). The brine flows in the heat transfer tube (41) and exchanges heat with the ice (32) in the heat storage tank (31). Therefore, the ice (32) is melted around the heat transfer tube (41), and a gap (33) is generated between the heat transfer tube (41) and the ice (32) (see FIG. 5). The gap (33) is filled with water which is a liquid phase.

When the air pump (52) is operated in this state, air is sent to the air pipe (50) through the air supply pipe (53). This air is blown out from the blowout hole (51) of the air pipe (50) and is supplied to the vicinity of the straight pipe portion (42) of the heat transfer pipe (41). That is, air is sent into the gap (33) formed around the heat transfer tube (41) by the air pipe (50).

The air supplied to the gap (33) flows upward along the straight pipe portion (42) of the heat transfer pipe (41) due to buoyancy. Due to this air flow, the water in the gap (33) is agitated and forced convection occurs. Here, the heat storage heat exchanger (40) is arranged such that the upper curved pipe portion (43) of the heat transfer pipe (41) projects above the water surface. Therefore, the gap (33)
The air supplied to the air flows in the gap (33) and is discharged into the air from the water surface.

<< Heat Storage Operation >> The operation during the heat storage operation will be described. This heat storage operation is performed by operating the brunchler (21) with inexpensive late-night power at night when indoor heating is not required. During this warm heat storage operation, the use side pump (72) is stopped and the water circulation in the use side circuit (70) is not performed. Further, during the warm heat storage operation, the air pump (52) is stopped and air is not supplied from the air pipe (50).

During the warm heat storage operation, the first three-way valve (27) and the second three-way valve (28) are set in the same manner as in the cold heat storage operation, and the brunchler (21) and the heat storage heat exchanger (40) are connected. The brine circulates between.

In the brunchler (21), the brine is heated by the heat pump cycle operation of the refrigerant circuit. The brine heated by the blast chiller (21) flows into the inlet header (45) of the heat storage heat exchanger (40) and is distributed to the heat transfer tubes (41). The distributed brine flows in the heat transfer tube (41) and exchanges heat with the water in the heat storage tank (31). The water in the heat storage tank (31) is heated by the hot brine. Then, the heat generated by the brunchler (21) is stored in the heat storage tank (31) as sensible heat of water which is a heat storage medium. After that, the brine is brilliant (2
It returns to 1), is heated, is sent to the heat storage heat exchanger (40) again, and this circulation is repeated.

<< Use Heating Operation >> The operation during use heating operation will be described. This utilization heating operation is performed mainly for heating the interior of the room during the daytime by using the warm heat stored in the thermal storage operation. Further, both the peak shift operation and the peak cut operation are performed as the utilization heating operation.

During the peak shift operation, the heat stored in the heat storage tank (31) in the heat storage operation is taken out, and at the same time, the blinchler (21) is also operated for heating. And
In the circulation circuit (20), the first three-way valve (27) and the second three-way valve (28) are set as in the above-described use cooling operation, and the brunchler (21), heat storage heat exchanger (40), main Heat exchanger (2
Brine circulates in the order of 2).

In the brilliantler (21), the brine is heated by the heat pump cycle operation of the refrigerant circuit. This brine is sent to the heat storage heat exchanger (40), further heated by the hot water in the heat storage tank (31), and then sent to the main heat exchanger (22). In the main heat exchanger (22), the hot brine and the water in the use side circuit (70) exchange heat with each other, and the water in the use side circuit (70) is heated. The brine radiated by the main heat exchanger (22) passes through the circulation pump (23) and is sent to the blasting chiler (21) again to repeat this circulation.

In the use side circuit (70), the main heat exchanger (22)
Water circulates between the heat exchanger (71) and the heat exchanger (71) on the use side. The water heated in the main heat exchanger (22) flows into the use side heat exchanger (71) to exchange heat with the indoor air, and the indoor air is heated. The water that radiates heat to the indoor air is sent to the main heat exchanger (22) by the use side pump (72), and this circulation is repeated.

On the other hand, in the peak cut operation, like the above-mentioned cooling operation in use, the brilliantler (21) is stopped and the brine is circulated between the heat storage heat exchanger (40) and the main heat exchanger (22). It will be done. And for peak cut operation,
Heating is performed using only the heat stored in the heat storage tank (31).

-Effects of Embodiment- In this embodiment, the heat transfer pipe (41) is provided by the air pipe (50).
Air is supplied to the vicinity of. Therefore, during the use cooling operation, a gap (33) is formed around the heat transfer tube (41) due to melting of the ice (32), and it is possible to send air into this gap (33). Therefore, the gap (33)
Forced convection can occur in the liquid phase of ice and ice (32)
The heat transfer between the heat transfer tube (41) and the heat transfer tube (41) can be promoted. As a result, it is possible to secure a sufficient amount of heat exchange between the ice (32) and the brine in the heat transfer tube (41), and it is possible to maintain high cold heat extraction performance during the use operation.

Further, since the cold heat extraction performance can be maintained high, the cold heat can be sufficiently extracted even when the amount of ice (32) remaining in the heat storage tank (31) becomes small. Therefore, even when the amount of ice (32) remaining in the heat storage tank (31) is small, the cold heat can be sufficiently taken out. Therefore, it is possible to avoid the problem that the cold heat cannot be taken out even when the ice (32) remains in the heat storage tank (31). Therefore, the cold heat stored in the heat storage tank (31) can be fully utilized, and energy loss due to residual ice can be reduced.

Furthermore, since a large amount of cold heat can be taken out in a short time, not only the peak shift operation but also the peak cut operation which cannot be handled by the conventional internal melting type ice heat storage device (30) are performed. be able to.

Further, in the present embodiment, the heat storage heat exchanger (40) is constructed so that the straight pipe portion (42) of the heat transfer pipe (41) is in a substantially vertical posture. Therefore, the air supplied to the vicinity of the heat transfer tube (41) through the air pipe (50) can be caused to flow by buoyancy. Therefore, it is not necessary to apply a driving force for flowing the air in the gap (33) between the heat transfer tube (41) and the ice (32), and the power consumption of the air pump (52) can be reduced.

Further, according to the present embodiment, by supplying air from the air pipe (50) provided only to the lowermost fixing plate (60), the straight pipe portion (42) is provided over substantially the entire length. The liquid phase in the gap (33) between the straight pipe part (42) and the ice (32) can be stirred. Therefore, it is possible to improve the cold heat extraction performance by reliably stirring the liquid phase while minimizing the number of air pipes (50).

Further, in this embodiment, the air pipe (50) is arranged in contact with the heat transfer pipe (41). Therefore, the air can be reliably sent to the vicinity of the heat transfer pipe (41) only by forming the blowout hole (51) in the air pipe (50), and the cold heat extraction performance can be improved by the air pipe (50) having a simple structure. It is possible to improve. Further, in the present embodiment, the air holes (5
1) is formed so as to open downward. For this reason,
Even when the air pump (52) is stopped, the amount of water flowing from the blowout hole (51) into the air pipe (50) can be suppressed.

Further, in this embodiment, the fixed plate (60) and the air pipe (50) are integrally formed. Therefore, by installing the fixing plate (60) for fixing the heat transfer tube (41), the air pipe (50) can be installed at the same time. Therefore, it is possible to simply maintain the assembly process of the heat storage heat exchanger (40) while improving the cold heat extraction performance by supplying the air as described above.

Further, according to this embodiment, the straight pipe portion (42) can be supported by the fixing plate (60) having the predetermined supporting hole (61), and the heat transfer pipe (41) can be fixed. That is, the fixing plate (60) capable of reliably fixing the heat transfer tube (41) can be realized with a simple structure. Furthermore, one fixing plate (60)
Thus, the two heat transfer tubes (41) can be fixed, and the number of fixing plates (60) can be reduced.

Further, in this embodiment, the heat transfer tube (41) is formed of a crosslinked polyethylene tube. Therefore, the heat transfer tube (4
1) is constructed so that it can bend with some flexibility. Therefore, even if the ice packing factor (IPF) in the heat storage tank (31) is set high, for example, 90% or more, the heat transfer pipe ( 41) can be prevented from being damaged. As a result, the IPF can be set high while avoiding the troubles caused by the damage of the heat transfer tube (41).

Further, the crosslinked polyethylene pipe has a characteristic that the pressure resistance at high temperature is high. Specifically, 60
The pressure resistance of the polyethylene pipe is 1.5kgf / cm at ℃
^{Although the} pressure is about ^{2, the} pressure resistance of the cross-linked polyethylene pipe is as high as about 8 kgf / cm ² . Therefore, even when performing the heat storage operation as in the present embodiment, it is possible to sufficiently secure the pressure resistant pressure of the heat transfer tube (41) and avoid troubles due to damage of the heat transfer tube (41). The heat storage operation can be stably performed.

[0101]

Other Embodiments of the Invention In the above embodiment,
The fixing plate (60) may have the following configuration. Less than,
The fixing plate (60) according to this modification will be described.

As shown in FIG. 7, a pair of slits (62) are formed on both sides of each support hole (61) of the fixed plate (60). The slit (62) is formed by cutting a predetermined length from the side surface of the fixed plate (60) toward the center. When this slit (62) is formed, the opening of the support hole (61) on the side surface of the fixed plate (60) is easily deformed, and the work of fitting the heat transfer tube (41) into the support hole (61) is facilitated. Become. Even when the heat transfer tube (41) is made of a copper tube or the like, the heat transfer tube (41) can be securely fitted into the support hole (61) by deforming the opening of the support hole (61). it can.

[Brief description of drawings]

FIG. 1 is a piping system diagram of an ice heat storage device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a heat storage tank and a heat storage heat exchanger housed in the heat storage tank.

FIG. 3 is a schematic perspective view showing a configuration of a heat storage heat exchanger.

FIG. 4 is an enlarged perspective view showing a main part of the heat storage heat exchanger.

FIG. 5 is a cross-sectional view of an essential part showing a cross section of a heat storage heat exchanger.

FIG. 6 is a front view showing the configuration of the fixing plate according to the embodiment of the present invention.

FIG. 7 is a front view showing a configuration of a fixing plate according to another embodiment of the present invention.

[Explanation of symbols]

(31) Heat storage tank (32) Ice (33) Gap (41) Heat transfer pipe (42) Straight pipe part (43) Upper curved pipe part (44) Lower curved pipe part (50) Air pipe (51) Blowout hole (60 ) Fixing plate (fixing member) (61) Support hole (62) Slit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-152162 (JP, A) JP-A-10-325572 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F 5/00 102 F25C 1/00

Claims (11)

(57) [Claims] 1. A heat storage tank (31) for storing a heat storage medium, and a heat transfer tube (41) arranged inside the heat storage tank (31), wherein the heat transfer medium flows through the heat transfer tube (41). To cool
The operation of ice making and heat storage of the heat medium flowing through the heat transfer tube (41)
Tank (31) in a ice <br/> ice storage device that performs the operation to take out cold by cooling, the heat storage tank (31) in a heat transfer tube (41) fixing member for fixing (60) If, while attached to the fixed member (60) Ru and an air pipe (50) supplying air to the vicinity of the heat transfer tube (41), the heat transfer tube (41) is a linear straight tube portion With (42)
In both cases, the straight pipe portion (42) is provided in a posture in which it is substantially vertical.
Is, the air pipe (50), heat transfer tube air when taking out the cold
It flows into the gap (33) created between the (41) and the ice (32) and
Inside the gap (33) along the straight pipe part (42) of the heat transfer pipe (41)
Under the straight pipe part (42) so that it flows by buoyancy.
An ice heat storage device that supplies air near the edges . 2. The ice heat storage device according to claim 1, wherein the heat transfer pipe (41) is formed of a cross-linked polyethylene pipe. 3. The ice heat storage device according to claim 1, wherein the fixing member (60) is provided in a posture orthogonal to the straight pipe portion (42) of the heat transfer pipe (41). An ice heat storage device configured to support. 4. A heat storage tank (31) for storing a heat storage medium, and a heat transfer tube (41) arranged inside the heat storage tank (31), wherein the heat transfer medium flows through the heat transfer tube (41). To cool
The operation of ice making and heat storage of the heat medium flowing through the heat transfer tube (41)
Tank (31) in a ice <br/> ice storage device that performs the operation to take out cold by cooling, the heat storage tank (31) in a heat transfer tube (41) fixing member for fixing (60) If, while the Ru and an air pipe for supplying air to the vicinity (50) of the heat transfer tube is attached to the fixed member (60) (41), the heat transfer tube (41) is a linear straight tube portion (42) provided with said fixing member (60) is configured to be provided in a position perpendicular to the straight pipe section (42) of the heat transfer tube (41) for supporting the straight tube portion (42), the The air pipe (50) is provided in contact with the straight pipe portion (42) of the heat transfer pipe (41) along the fixing member (60), and the air pipe (50) has a blowout hole ( 51)
Is an ice heat storage device formed corresponding to the straight pipe portion (42). 5. The ice heat storage device according to claim 1 or 4, wherein the heat transfer pipe (41) includes a plurality of straight pipe portions (42) and respective straight pipe portions (42).
An ice heat storage device having a semi-arcuate curved pipe portion (43, 44) connecting the two and having a meandering shape. 6. The ice heat storage device according to claim 3, wherein the air pipe (50) extends along the fixing member (60).
The air pipe (50) has a blowout hole (51) that opens downward and blows out air in the straight pipe portion (42) while being provided in contact with the straight pipe portion (42) of 1). Correspondingly formed ice heat storage device. 7. The ice heat storage device according to claim 3, wherein a plurality of fixing members (60) are provided in the longitudinal direction of the straight pipe portion (42) of the heat transfer pipe (41), and the air pipe (50) is the most An ice heat storage device provided on the fixing member (60) located below. 8. The ice heat storage device according to claim 1, 4 or 5, wherein the fixing member (60) is formed in a plate shape, and the fixing member (60) is provided on a side portion of the fixing member (60). An ice heat storage device having a support hole (61) formed by cutting out a side surface of (60) in an arc shape and into which a straight pipe section (42) of a heat transfer tube (41) is fitted. 9. The ice heat storage device according to claim 5, wherein the heat transfer pipe (41) is formed so that the plurality of straight pipe portions (42) are located on the same plane, and the heat storage tank (31) includes: The plurality of heat transfer tubes (41) are provided at predetermined intervals, while the fixing member (60) is formed in a plate shape, and the heat transfer tubes (41) are provided.
Every other space between the above-mentioned fixing members (6
Supporting holes (61), which are notched in an arc shape from the side surface of the fixing member (60) and into which the straight pipe portion (42) is fitted, are formed on both sides of the straight pipe portion (42) in correspondence with the straight pipe portion (42). , An ice heat storage device configured to support a straight pipe portion (42) of two adjacent heat transfer pipes (41). 10. The ice heat storage device according to claim 8 or 9 , wherein the support hole (61) of the fixing member (60) has a straight opening of the heat transfer tube (41) on the side surface of the fixing member (60). An ice heat storage device formed to be slightly narrower than the diameter of the part (42). 11. The ice heat storage device according to claim 10 , wherein both sides of the support hole (61) in the fixing member (60) extend in the width direction of the fixing member (60) from the side surface of the fixing member (60). Ice storage device with slits (62) formed one by one.