JPH07294076A - Ice making section of ice cold storage tank - Google Patents

Abstract

PURPOSE:To efficiently take out cold, while amounts of stored ice are maintained as much as possible, wheres controlling of stoppage of ice making can be easily conducted. CONSTITUTION:In an ice making section of an ice cold storage tank wherein a plurality of cooling pipes are separately arranged to freeze the water therein, the interior of the tank is divided into layered cooling regions stacked one on another in the width direction thereof and the plurality of cooling pipes 7 are arranged in such a manner that the interval LA between the adjoining pipes 7 of the adjoining cooling regions is made larger than the interval LB between the adjoining pipes 7 in the cooling region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage tank installed in a basement or a roof of a building as a component of an air conditioner so as to perform economical air conditioning using electric power at night, more specifically, in a storage tank. A so-called static ice heat storage system, in which multiple cooling pipes for freezing water are distributed and arranged in the storage tank to freeze the water in the storage tank around the cooling pipes to make ice. Regarding the ice making section of the tank.

[0002]

2. Description of the Related Art As means for freezing water in a storage tank of an ice heat storage tank to make ice, a cooling pipe constituting an ice making section is supplied with a refrigerant so that the cooling pipe functions as an evaporator of a refrigerator. There is a direct expansion type means for making ice and a brine supply type means for making ice by supplying brine cooled to below 0 degree by a refrigerator to a cooling pipe.

When the cooling pipes are dispersed in the storage tank as described above and the surface of each cooling pipe is used as a cooling surface to freeze the water in the storage tank, the entire circumference of the cooling pipe is
Since it becomes a cooling surface that contacts and cools the water in the storage tank, for example, the cooling pipe group is sandwiched by a pair of cooling plates that form the cooling surface that contacts the water, and the cooling plate is cooled by the cooling pipe group. This has the advantage that the cooling surface can be made larger and the ice can be made more efficiently, as compared with an ice making unit in which water is frozen on the surface of the cooling plate.

In order to construct the ice making section of the ice heat storage tank having such an advantage, conventionally, as shown in FIG. 15, a plurality of cooling pipes 7 are arranged at equal intervals L in both vertical and horizontal directions.

[0005]

However, in the case of the above-mentioned conventional technique, the intervals between the cooling pipes in both the vertical and horizontal directions are equal, so that there are the following drawbacks.

That is, as shown in FIG.
Since the ice layer 10 attached to the outer peripheral surface of each cooling pipe (hereinafter referred to as an ice layer) grows at almost the same rate, when the growth of the ice layer 10 progresses and the layer thickness increases, FIG.
Finally, as shown in (b), the contact between the freezing layers 10 attached to the adjacent cooling pipes in the vertical direction and the contact between the freezing layers 10 attached to the adjacent cooling pipes in the horizontal direction are simultaneously performed. The surrounding space of the cooling pipe, which was in a series of states before the contact, was surrounded by four ice layers contacting in both vertical and horizontal directions, and was disconnected from the other, that is, it spreads in the vertical and horizontal directions. It is divided into a plurality of linear passages s each having a narrow vertical width and a narrow horizontal width. Then, as shown in FIG. 15C, the width of the linear passage s becomes gradually narrower as the freezing layer 10 grows, and even if the entire length of the linear passage s is not blocked by freezing. As a result, the linear passage s is likely to be blocked at a local portion in the longitudinal direction thereof due to freezing. When the linear passage s is blocked, the water supplied to the storage tank is brought into contact with the freezing layer 10 and the freezing layer 10 is melted to cool the water. Water does not flow in the generated linear passage s, and the closed linear passage s
Water cannot be brought into contact with the surrounding frozen layer 10. That is, for the amount of the frozen layer created in the storage tank, the contact area of the water for extracting the stored cold heat is small and the water cannot be efficiently cooled by the frozen layer, The stored cold heat cannot be efficiently extracted.

However, if the ice-making stop time is unnecessarily advanced, the amount of ice making, that is, the amount of ice storage is greatly reduced for the size of the storage tank, and the heat storage capacity is lowered.

[0008] In short, according to the prior art, in order to efficiently take out the stored cold heat while increasing the amount of stored ice as much as possible, when water is frozen in the cooling pipe to make ice. , It was necessary to stop the growth of the ice layer exactly before the blockage of the linear passage, and it was difficult to control the ice making stop.

An object of the present invention is to make it possible to efficiently take out cold heat while increasing the amount of ice storage as much as possible, and to easily control and stop ice making for that purpose.

[0010]

A feature of the ice making section of an ice heat storage tank according to the present invention is that the inside of the storage tank is divided into layered cooling zones that overlap in the thickness direction, and the plurality of cooling pipes are adjacent to each other. This is because the cooling pipes in the matching cooling areas are arranged such that the intervals between the cooling tubes are larger than the intervals between the cooling tubes in the cooling area.

[0011]

Since the intervals between the cooling pipes in the adjacent cooling regions are larger than the intervals between the cooling pipes in the cooling regions, the ice layer adhering to the outer peripheral surface of each cooling pipe grows at almost the same rate, The ice layers of adjacent cooling pipes in the area contact each other first, and then the ice layers of the cooling tubes in the adjacent cooling areas contact each other, and after the ice layers of the adjacent cooling tubes in the cooling area contact each other, Until the ice layers of the cooling pipes in the adjacent cooling areas come into contact with each other, the ice layers of the adjacent cooling pipes grow in the cooling area, and at the same time, the contact portions of the ice bath grow as well. Plate-like ice that faces each other at a distance in an attitude is created, and a sheet-like passage that spreads vertically and horizontally along the cooling area is provided between the plate-like ice (hereinafter referred to as an ice plate) that faces each other. Will be formed.

Then, the planar passages become gradually thinner as the ice layer grows, that is, as the thickness of the ice plate increases, and the ice plates are likely to come into contact with each other at their locally opposed portions. It will be a matter of course, but since the planar passage spreads vertically and horizontally,
Even if a local contact connection of the opposing portions of the ice plate occurs, the planar passage is not blocked by it, and water permeability in the planar passage can be secured. In other words, even in a state where local contact and connection between the opposing portions of the ice plate occur, water permeability in the planar passage can be ensured, so that water permeability in the planar passage can be secured at the same time. In order to increase the amount of ice making as much as possible, it is not necessary to stop the ice making exactly before the opposing parts of the ice plates are locally contacted and connected. Also, it is possible to secure the water permeability in the planar passage and sufficiently secure the contact area of the water with the ice storage at the time of taking out the heat storage cold heat.

Moreover, in order to form an ice plate for forming a planar passage, a plurality of cooling pipes are juxtaposed to each other by contacting and connecting adjacent ones in the juxtaposing direction of the ice layers adhering and growing on their outer peripheral surfaces. Since an ice plate is created, it is possible to make ice efficiently.

That is, as means for making an ice plate,
For example, as disclosed in Japanese Patent Laid-Open No. 59-38535, a plurality of plate-shaped ice makers (corresponding to the cooling tubes of the present invention) are provided in a storage tank at intervals, and the ice makers are provided on the surface. There is a means to freeze and create an ice plate. Compared to this means, according to the present invention, when the cooling pipes are juxtaposed in the occupied space of the same size as the ice maker, by appropriately setting the intervals of the cooling pipes, the outer peripheral surface of the cooling pipe that comes into contact with water The area of the cooling surface for freezing formed from can be made larger than the area of the cooling surface formed from the surface of the ice maker, and the efficiency of ice making can be made excellent.

[0015]

According to the present invention, therefore, an ice layer formed on the outer peripheral surface of a cooling pipe is grown to a thickness of a layer for adhering adjacent ones to form an ice plate, and the ice plate itself By making the space between adjacent ice plates very small so as to make the thickness as large as possible, it is possible to increase the amount of ice making (the amount of ice storage) and to increase the heat storage capacity, and at the same time, make that ice plate. It is possible to efficiently take out the stored cold heat by ensuring the water passage of the planar passage formed between them, and yet, for that purpose, the control management of the ice making stop for that can be easily performed, and It has become possible to efficiently create the ice plate necessary for taking out the ice efficiently.

[0016]

[Example] As shown in FIG. 1, an ice heat storage facility has an air conditioner A.
Cold water is supplied to the ice storage device and is provided with an ice heat storage tank and a refrigerator B. The heat storage tank freezes the water in the storage tank 1 by the cold heat of the refrigerator B. It is configured by installing the section 2.

The storage tank 1 includes a receiving chamber 1A for receiving return water from the air conditioner A, a take-out chamber 1B for sending water to the air conditioner A, and an ice-making cooling chamber 1C arranged between them. It is divided into 3 rooms, the reception room 1A
The partition wall 3 between the ice making cooling chamber 1C and the ice making cooling chamber 1C is formed with an inlet 4 for communicating the bottom portions of both of them with each other.
An outlet 5 is formed in the partition wall 3 between the take-out chamber 1B and the take-out chamber 1B so as to communicate the both.

Then, water is sent from the take-out chamber 1B to the air conditioner A along with the operation of the cold water pump P1 for air conditioning, and the return water from the air conditioner A is received in the receiving chamber 1A, thereby cooling the ice making from the receiving chamber 1A. Water is transferred to the chamber 1C via the inlet 4 and at the same time, water is transferred from the ice making cooling chamber 1C to the unloading chamber 1B via the outlet 5 to provide the air conditioner A.
It is configured to circulate water to the.

The ice making section 2 is arranged in the ice making cooling chamber 1C of the storage tank 1, and the water in the ice making cooling chamber 1C is exchanged by heat exchange with the brine cooled to 0 ° C. or less in the refrigerator B. To freeze. Therefore, the ice making cooling chamber 1C
By performing the above-mentioned water circulation in a state where the water inside is frozen, the circulating water is brought into contact with the ice making and cooled when passing through the ice making cooling chamber 1C. That is, cool water is supplied to the air conditioner
Can be supplied to.

Then, as shown in FIG. 2, the ice making unit 2 receives the brine from the refrigerator B via the brine circulation pump P2 and the inlet header 6A to receive water and heat in the ice making cooling chamber 1C. After the replacement, the cooling pipe 7 is returned to the refrigerator B via the outlet header 6B to disperse and arrange a plurality of cooling pipes 7 having a circular cross section for freezing the water in the ice-making cooling chamber 1C on the outer peripheral surface thereof. It consists of:

More specifically, as shown in FIG. 3, the inside of the ice-making cooling chamber 1C is divided into layered cooling regions that overlap in the thickness direction, and a plurality of cooling pipes 7 are provided in the cooling regions 7 adjacent to each other. The interval LA is larger than the interval LB of the cooling pipes 7 in the same cooling zone. Specifically, the plurality of cooling areas are vertically overlapped with each other, and all of the cooling pipes 7 are arranged in parallel horizontal postures. Further, as also shown in FIG. 4, a plurality of cooling pipes 7 are arranged in a row in each of the respective cooling regions, and are mounted and fixed on a shelf 9 supported by columns 8. Shelf 9
Is composed of a plurality of crosspieces 9A arranged at intervals, and the gap between adjacent crosspieces 9A is a water passage hole 10 in the vertical direction.

Therefore, according to the above ice heat storage tank, the brine from the refrigerator B is supplied to each cooling pipe 7 while the circulation supply of water to the air conditioner A is stopped, so that the inside of the ice making cooling chamber 1C is cooled. Of the water, the water around the cooling pipe 7 freezes in a state of adhering to the outer peripheral surface of the cooling pipe 7, and an ice layer 10 is formed around the cooling pipe 7 as shown in FIG. Cooling pipe 7
By continuing the supply of brine to the ice layer 10, the frozen layer 10 gradually grows. Then, as the growth of the frozen layer 10 progresses, adjacent frozen layers 10 come into contact with each other, but the interval LA of the cooling pipes 7 is larger than the arrangement interval LB. Interval L
In B, since the interval LA between the cooling pipes 7 is smaller than that, the contact between adjacent ones of the ice layers 10 located in the same cooling area is located in the adjacent cooling area as shown in FIG. By the cooling that is performed earlier than the contact of the freezing layer 10 and the brine supply is continued, the contact part of the adjacent freezing layer 10 grows to increase the thickness of the other part as well, In each of the cooling zones, as shown by the alternate long and short dash line in FIG. 3B, flat ice 11 (hereinafter referred to as an ice plate).
Will be formed in a state in which the planar passage 12 in the horizontal posture is formed between the adjacent cooling regions in the vertical direction.

Contrarily to this, the height h of the planar passage 12 gradually decreases as the ice plate 11 grows (increased in thickness) due to continuous cooling, and when cooling is continued, Ice plates 1 facing each other across the planar passage 12 in the vertical direction
1 will be in a state where it is easy to locally contact and connect to each other. However, as shown in (c) of FIG. 3 and FIG. Since the passage 12 is wide in the left-right and front-rear direction, the water passage resistance in the planar passage 12 is slightly increased, but the planar passage 12 is not blocked by the contact connecting portion 11a, and this contact connection is achieved. Water flows around the portion 11a, and the water passage in the planar passage 12 is guaranteed regardless of the formation of the contact connection portion 11a.

Therefore, even if the cooling (ice making) by supplying the brine to the cooling pipe 7 is performed until the time when the contact connecting portion 11a is formed, in the planar passage 12 between the adjacent ice plates 11. Since it is possible to guarantee the water permeability, it is possible to efficiently take out the stored cold heat through the planar passage 12 by supplying water to the air conditioner A in a circulating manner. Ie entrance 4
When the water passes through the ice-making cooling chamber 1C so as to enter from the outlet and exit from the outlet 5, it can flow through all the planar passages 12, a large contact area with the ice-making can be obtained, and the passing water can be efficiently cooled by the ice-making. be able to.

As a means for installing the inlet header 6A and the outlet header 6B, as shown in FIG. 6A, the inlet header is arranged so that water is distributed / collected to the cooling pipes 7 located in the same cooling zone. 6A and the outlet header 6B are installed together, and as shown in FIG. 6B, the inlet header 6A and the outlet so that the water is distributed / collected to the cooling pipes 7 arranged at the interval LA. Means for installing the header 6B together, as shown in FIG. 7A, install the inlet header 6A so as to distribute the water to the cooling pipes 7 group located in the same cooling area, while separating the gap LA. A means for installing the outlet header 6B so as to collect water to the cooling pipes 7 arranged as a unit, and water for the cooling pipes 7 arranged at the interval LA as shown in FIG. 7B. The inlet header 6A to distribute the To one, outlet header 6B so as to set the water with respect to the cooling pipe 7 group positioned on the same cooling zone
There may be mentioned a means for installing the. PA is a dispersion pipe that distributes and supplies the brine supplied by the brine supply path Pa from the refrigerator B to each inlet header 6A,
PB is a collecting pipe that collects and returns the brine from each outlet header 6B to the brine return path Pb to the refrigerator B.

As shown in FIG. 8, the cooling pipe 7 is made up of a plurality of (three in the drawing are shown, but may be three or more) pipe members 13 closely or closely arranged. Alternatively, as shown in FIGS. 9 and 10, a synthetic resin integrally formed with a plurality of tube portions 14a and a sheet portion 14b that connects adjacent tube portions 14a and regulates the interval between them. Alternatively, the pipe member 14 made of a material may be provided and the pipe portion 14a may be the cooling pipe 7. In this case, the piping member 1
If a sheet portion 14b having a rigidity capable of holding the shape is used as the sheet portion 4, a shelf 9 for supporting the cooling pipes 7 is loaded.
Is unnecessary, and it suffices to attach the piping member 14 to the column 8. The piping member 14 shown in FIG. 9 has a seat portion 14b.
The pipe portion 14a is arranged only on one side of the front and back sides of the above, and the piping member 14 shown in FIG. 10 has the pipe portions 14a arranged on both front and back sides of the seat portion 14b. In order to cool the water efficiently by taking a large contact area with the water of the pipe portion 14a, that is, the cooling pipe 7,
4a is connected to the seat portion 14b via the standing plate portion 14c. Further, a water passage hole 14h is formed in the seat portion 14b to allow water to pass between the front and back. And
Even when the cooling pipe 7 is configured using the piping member 14, the ice plate 11 in which the seat portion 14b is embedded is created.

[Other Embodiment] In the above embodiment, the inside of the storage tank 1 is divided into a plurality of vertically overlapping cooling zones, and a plurality of horizontal cooling pipes 7 are arranged in each cooling zone. Cooling pipes 7 in the cooling areas adjacent to each other in the vertical direction with respect to the arrangement interval LB of
It is configured to create a plurality of horizontal ice plates 11 arranged at intervals in the vertical direction by increasing the interval LA of the above. However, as shown in FIG. Are divided into a plurality of cooling zones that overlap with each other, and a plurality of cooling pipes 7 in a horizontal posture are arranged in each cooling zone, and an interval LA between cooling pipes 7 in the cooling regions that are horizontally adjacent to each other than the arrangement interval LB of the cooling pipes 7. It may be configured such that a plurality of ice plates 11 in vertical postures are horizontally arranged at intervals by increasing the size. The cooling pipe 7 is configured by using the piping member 14 shown in FIG. 10, but of course, the cooling pipe having the cooling pipe configuration shown in FIG. 4, FIG. 8 or FIG. Is also good.

In the above embodiment, the ice making section 2 provided with the straight pipe as the cooling pipe 7 is shown.
Alternatively, it may be as shown in FIGS. 13 and 14.

In the ice making section 2 shown in FIG. 12, a plurality of types of upwardly U-shaped cooling tubes 7 having different sizes are prepared, and the large surface is positioned on the outer side, and the vertical surface is in a posture along the left and right. And a plurality of such cooling pipe groups are arranged at front and rear portions at intervals.

Then, as shown in FIG. 12B, each of the portions where the cooling pipes 7 of the same size are arranged in a row is set as a cooling region, and the front-rear spacing Lb of the cooling pipes 7 of the same size is set in the cooling region. And the in-plane spacing La of the cooling pipes 7 located in the same vertical plane is set to be the spacing LA between the cooling pipes 7 in the adjacent cooling regions that is larger than the above-mentioned placement interval LB. A plurality of ice plates 11 having different U-shaped cross-sections and having large ones located outside are created at different intervals inward and outward, and on the other hand,
As shown in (c) of FIG. 12, the cooling pipes of different sizes located in the same vertical plane are used as cooling regions, respectively, where the cooling pipes 7 of different sizes located in the same vertical plane are arranged in rows. The in-plane interval La of 7 is the arrangement interval LB in the cooling area, and the front-rear interval Lb of the cooling tubes 7 having the same size is the interval LA between the cooling tubes 7 in the adjacent cooling areas larger than the arrangement interval LB. By doing so, a plurality of ice plates 11 having a flat plate shape and arranged at front and rear intervals are formed.

Therefore, according to the former ice-making unit 2 having the cooling pipe arrangement, the planar passage 12 having an upward U-shaped cross section is formed between the adjacent ice plates 11 having the upward U-shaped cross-section. On the other hand, according to the latter ice making unit 2 having the cooling pipe arrangement, the vertically oriented flat plate-shaped passage 12 is formed between the adjacent vertically oriented flat plate ice plates 11. In addition, in this another embodiment, when the ice making unit 2 has the former cooling pipe arrangement,
It is also possible to carry out without arranging the cooling pipes 7 which are different in size and are spaced in the inward and outward directions on the same vertical plane, and on the other hand, when the ice making unit 2 is of the latter cooling pipe arrangement,
Cooling pipes 7 that are the same size and are spaced apart in the front-rear direction
It is also possible to implement without arranging in the same inward and outward direction positions.

The ice making section 2 shown in FIG. 13 has a plurality of types of downwardly U-shaped cooling tubes 7 of different sizes, and a large vertical one is positioned on the outer side in a vertical plane. And a plurality of such cooling pipe groups are arranged at front and rear portions at intervals.

Then, as shown in FIG. 13B, each of the portions where the cooling pipes 7 of the same size are arranged in a row is used as a cooling region, and the front-rear spacing Lb of the cooling pipes 7 of the same size is used in the cooling region. And the in-plane spacing La of the cooling pipes 7 located in the same vertical plane is set to be the spacing LA between the cooling pipes 7 in the adjacent cooling regions that is larger than the above-mentioned placement interval LB. A plurality of ice plates 11 having different U-shapes in cross-section and having large ones located outside are created at different intervals inward and outward, and on the other hand,
As shown in (c) of FIG. 13, cooling pipes of different sizes located in the same vertical plane are used as cooling regions, respectively, where cooling pipes 7 of different sizes located in the same vertical plane are arranged in rows. The in-plane interval La of 7 is the arrangement interval LB in the cooling zone, and the front-rear interval Lb of the cooling tubes 7 having the same size is the interval LA between the cooling tubes 7 in the adjacent cooling zones larger than the arrangement interval LB. By doing so, a plurality of ice plates 11 having a flat plate shape and arranged at front and rear intervals are formed.

Therefore, according to the former ice making section 2 having the cooling pipe arrangement, the planar passage 12 having a downward U-shaped cross section is formed between the adjacent ice plates 11 having a downward U-shaped cross section. On the other hand, according to the latter ice making unit 2 having the cooling pipe arrangement, the vertically oriented flat plate-shaped passage 12 is formed between the adjacent vertically oriented flat plate ice plates 11. In addition, in this another embodiment, when the ice making unit 2 has the former cooling pipe arrangement,
It is also possible to carry out without arranging the cooling pipes 7 which are different in size and are spaced in the inward and outward directions on the same vertical plane, and on the other hand, when the ice making unit 2 is of the latter cooling pipe arrangement,
Cooling pipes 7 that are the same size and are spaced apart in the front-rear direction
It is also possible to implement without arranging in the same inward and outward direction positions.

The ice making unit 2 shown in FIG. 14 is constructed by preparing a cooling pipe 7 in a spiral shape and arranging a plurality of cooling pipes 7 in a vertical posture along the left and right and at intervals in the front-rear direction. There is.

Then, as shown in FIG. 14B,
A portion having a spiral cross-sectional shape including all the cooling pipes 7 is set as a cooling region, a front-rear spacing Lb of the cooling pipes 7 is set as an arrangement spacing LB in the cooling region, and a radial distance Lc of the cooling pipes 7 is set as described above. Cooling pipes 7 in adjacent cooling areas that are larger than the distance LB
By setting the spacing LA to be different from each other, the ice plate 11 having a spiral shape in cross section is formed, and on the other hand, as shown in FIG. Each of them is used as a cooling zone, and the radial interval Lc of the cooling tubes 7 is set as an arrangement interval LB in the cooling zone, and the front-back interval Lb of the cooling tubes 7 is larger than the radial interval Lc. By setting the interval LA of
It is configured to create a plurality of ice plates 11 that are flat and spaced apart in the front and rear.

Therefore, according to the former ice making section 2 having the cooling pipe arrangement, the planar passage 12 having the spiral cross-sectional shape is formed, while according to the latter ice making section 2 having the cooling pipe arrangement, the adjacent vertical postures are provided. The flat plate-shaped planar passage 12 is formed between the flat plate-shaped ice plates 11. In addition, in this another embodiment,
Two rows of cooling pipes 7 are provided in parallel in the storage tank 1.
The cooling pipes 7 may be provided in one or more rows.

In the above embodiment, the postures of all the cooling pipes 7 are the same, but the postures of the cooling pipes 7 arranged in the adjacent cooling zones may be different.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 Schematic configuration diagram of ice heat storage equipment

FIG. 2 is a schematic vertical sectional side view of an ice heat storage tank.

FIG. 3 is a sectional view showing a cooling pipe arrangement and an ice making process.

FIG. 4 is a perspective view showing a cooling pipe.

5 is a sectional view taken along line aa in FIG.

FIG. 6 is a perspective view showing an arrangement of an inlet header and an outlet header.

FIG. 7 is a perspective view showing an arrangement of an inlet header and an outlet header.

FIG. 8 is a perspective view showing another cooling pipe configuration.

FIG. 9 is a perspective view showing another cooling pipe configuration.

FIG. 10 is a perspective view showing another cooling pipe configuration.

FIG. 11 is a view showing another embodiment, in which (a) is a vertical sectional side view,
(B) is a plan view

FIG. 12 is a view showing another embodiment, in which (a) is a perspective view of a cooling pipe, and (b) and (c) are vertical sectional views in an ice-making state.

13A and 13B are views showing another embodiment, in which (A) is a perspective view of a cooling pipe, and (B) and (C) are vertical sectional views in an ice-making state.

14A and 14B are views showing another embodiment, in which (A) is a perspective view of a cooling pipe, and (B) and (C) are vertical sectional views in an ice-making state.

FIG. 15 is a cross-sectional view showing a conventional cooling pipe arrangement and an ice making process.

[Explanation of symbols]

 1 Storage tank 7 Cooling pipe LA interval LB arrangement interval

Claims (1)

[Claims] 1. An ice making part of an ice heat storage tank in which a plurality of cooling pipes (7) for freezing water in the storage tank (1) are dispersed and arranged in the storage tank (1), Inside the tank (1)
The cooling pipes (7) are divided into layered cooling zones that overlap in the thickness direction, and the plurality of cooling pipes (7) are arranged at intervals (L) between the cooling pipes (7) in the adjacent cooling zones.
A) is the arrangement interval (L) of the cooling pipes (7) in the cooling area.
The ice-making section of the ice storage tank, which is arranged to be larger than B).