JPH10288436A - Static type ice making apparatus in ice storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take out cold heat in an approximately constant state by spraying water on a plurality of cooling plates extending in a longitudinal direction and spaced and arranged at an appropriate pitch in a lateral direction to make ice grow in an ice making tank and providing on each of the cooling plates a plurality of cooling pipes spaced and arranged at an appropriate pitch in the longitudinal direction. SOLUTION: In an ice making tank 1 a plurality of cooling plates extending in a vertical direction are arranged and spaced side by side at an appropriate pitch S in a lateral direction and above each of the cooling plates a spray tube 3 for spraying water to a front face and rear face of a top part of each cooling plate 2 and the water is sprayed onto the front and rear face of each cooling plate 2 from each spray tube 3. A plurality of cooling pipe 6 extending in the lateral direction is provided on each cooling pipe 2 in a fixed state at an appropriate pitch P and cooling medium cooled by a refrigerating machine, which is not contained in each cooling pipe 6, is made to flow. The water flowing downward along the front and rear faces of each cooling plate 2 and surface of each cooling pipe 6 is frozen on these surfaces to form ice having a specified thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice heat storage system in which water is frozen using electric power at night to cool the water during the day, for example, in order to average electric power demand. And a static ice making device for freezing water.

[0002]

2. Description of the Related Art Generally, an ice making device used in an ice heat storage system is supplied with water by a cooling body through which a cooling medium flows.
Freeze it without ice on the surface, or
There are a dynamic type in which ice is frozen while dropping ice from the surface of the cooling body, and a static type in which water is frozen to a predetermined thickness with ice adhered to the surface of the cooling body.

In the latter static type ice making apparatus, a large number of cooling pipes extending horizontally or vertically are provided in an ice making tank in a matrix in a vertical direction and a horizontal direction. While flowing the cooling medium inside the pipes, the entire cooling pipes are immersed in water, or water is sprayed on the entire surface of each cooling pipe so that ice has a predetermined thickness on the surface of each cooling pipe. It is configured to grow quickly.

[0004]

By the way, in this static type ice making device, cooling using ice frozen on the surface of each cooling pipe is performed by using the ice adhering to the surface of each cooling pipe. Is performed by utilizing the cold heat by contacting water with the ice and melting the ice, so that the ice adhering to the surface of each cooling pipe is sequentially melted from the surface of the ice. Then, it takes a form in which the thickness gradually decreases.

On the other hand, in the conventional static ice making apparatus, as described above, ice is grown to a predetermined thickness on the surface of each cooling pipe. Because the grown ice is columnar, the surface area of the ice adhering to the surface of each cooling pipe decreases sharply as the ice melts and becomes thinner, thus reducing its diameter. Will decrease.

For this reason, the amount of cold heat extracted from the ice on the surface of each cooling pipe rapidly decreases as the melting of the ice progresses, so that the cold heat cannot be extracted in a stable state. There was a problem to say. Moreover, in the conventional static type ice making apparatus, the ice is frozen only on the surface of each cooling pipe, and the ice making area is limited to the surface area of each cooling pipe. Must be increased.

In addition, water for melting the ice can flow sufficiently between the cooling pipes even after the ice has grown to a predetermined thickness on the surface thereof. It is necessary to ensure such a gap, and for this purpose, the interval between the respective cooling pipes must be considerably large in both the vertical direction and the horizontal direction. Since the amount of ice per unit volume in the ice making tank accommodating the cooling pipe is reduced, the number of the cooling pipes must be increased as described above, so that the ice making tank becomes large, and as a result, However, there is also a problem that the entire ice making device becomes large.

[0008] It is an object of the present invention to provide a static type ice making device which solves these problems.

[0009]

In order to achieve this technical object, the present invention provides a method of forming a plurality of cooling plates extending in a vertical direction in an ice making tank in a horizontal direction at an appropriate pitch interval. Along with disposing, while dispersing means for distributing water to the front surface and back surface of the upper end portion of each cooling plate is disposed, while a cooling medium flows inside each of the cooling plates, and A plurality of cooling pipes extending in the horizontal direction are provided at an appropriate pitch in the vertical direction. "

[0010]

In this configuration, water is sprayed on the front and back surfaces of each cooling plate from the spraying means at the upper portion, so that the water is applied to both the front and back surfaces of each cooling plate, and While flowing down along the surface of each cooling pipe provided, each cooling plate and each cooling pipe are cooled by a cooling medium flowing in each cooling pipe. The water flowing down along the surface of each cooling pipe freezes on both front and back surfaces of each cooling plate and the surface of each cooling pipe, and grows into ice of a predetermined thickness.

That is, since ice grows in a plate shape on both the front and back surfaces of each cooling plate and the surface of each cooling pipe, the surface area of the ice is substantially independent of the thickness of the ice. Since the ice is constant, the ice is melted with water sprayed on the upper end of each cooling plate, so that when the ice is taken out as cold, the amount of heat taken out drops sharply as the melting of the ice progresses. This makes it possible to avoid cooling and to extract cold heat to a substantially constant state.

Moreover, each cooling plate acts as a fin for transmitting heat to each cooling pipe fixed to the cooling plate, so that the ice making area can be greatly increased as compared with a conventional cooling pipe alone. In addition to this, in addition to this, it is only necessary to secure a gap between the respective cooling plates so that water for melting the ice can sufficiently flow. The ice holding area can be increased as compared with the conventional case, so that the ice making area can be increased and the ice holding amount per unit volume in the ice making tank can be increased,
The ice making tank and, consequently, the entire ice making device can be miniaturized.

By the way, in the above-described configuration, the thickness of ice growing on both front and back surfaces of each cooling plate and the surface of each cooling pipe due to the flow of the cooling medium in each cooling pipe, Thick at the part of the cooling pipes and thinner at the part between the respective cooling pipes of the respective cooling plates, so that the respective cooling pipes at the respective cooling plates have the same height for each of the respective cooling plates. If the cooling plate is located at the same position, the portion of each cooling plate where the ice is the thickest is located at the same height. It must be enlarged to ensure a predetermined gap.

On the other hand, the present invention proposes that the cooling pipes in each cooling plate are provided in a staggered arrangement between the respective cooling plates, whereby the ice in each cooling plate is provided. The thickest part and the thinnest part of the ice are alternately located at the same height, and the thickest part of the ice is located at the thinnest part of the ice. Since it enters, the spacing between the cooling plates can be narrower than when each cooling pipe in each cooling plate is provided at the same height for each of the cooling plates, so that the cooling pipes are placed in the ice making tank. The number of cooling plates that can be provided can be increased, so that the amount of ice per unit volume in the ice making tank can be increased, and the ice making device can be made more compact.

Further, when extracting the cold heat, the ice in each cooling plate is melted by water sprayed on the upper end of each cooling plate, so that the ice in each cooling plate is In this case, the upper end portion is melted and disappears first, and in this case, the amount of cold heat taken out changes greatly. On the other hand, the present invention proposes that the vertical interval of each cooling plate in each cooling pipe is narrowed at the upper end of each cooling plate, whereby the upper end of each cooling plate is Since the thickness of the ice at each portion can be made thicker than the thickness of the ice at the lower end of each cooling plate, it is ensured that the upper portion of the ice at each cooling plate melts first and disappears. , And the cold heat can be taken out in a stable state for a long time.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment. In this figure, reference numeral 1 denotes an ice-making tank, and a plurality of cooling plates 2 made of aluminum or the like extending in a vertical direction are arranged in the ice-making tank 1 so as to be arranged substantially in parallel in a horizontal direction at an interval of an appropriate pitch S. Have been.

In a part of the ice making tank 1 above each of the cooling plates 2, a spray pipe 3 for spraying water to the front surface and the back surface of the upper end of each cooling plate 2 is provided. The cooling plate 2 is provided for each location. The water sprayed on each of the front and back surfaces of each cooling plate 2 in each of the water spray pipes 3
Circulates down the front and back surfaces and accumulates at the bottom in the ice making tank 1, and is again sent to the spray pipes 3 by the circulation pump 4 and sprayed to the cooling plates 2. A heat exchanger 9 for taking out cold heat is provided in the water circulation pipe line 5 from the circulation pump 4 to each spray pipe 3.

Each of the cooling plates 2 is provided with a plurality of cooling pipes 6 extending in the horizontal direction and fixed by welding or the like at intervals of an appropriate pitch P in the vertical direction. Each of the components 6 is configured so that a cooling medium cooled by a refrigerator (not shown) is supplied from a supply pipe 7 and then flows out from a discharge pipe 8. In this case, each cooling pipe 6 in each cooling plate 2 is connected between two adjacent cooling plates 2 of each cooling plate 2 by each cooling pipe 6 in one cooling plate 2. The cooling plates 2 are arranged in a staggered arrangement so as to be located between the cooling pipes 6.

As described above, water is sprayed on the front and back surfaces of each cooling plate 2 from the spray pipe 3 at the upper portion thereof, and this water is applied to both the front and back surfaces of each cooling plate 2 and the water. While flowing down along the surface of each cooling pipe 6 provided, each cooling plate 2 and each cooling pipe 6 are cooled by a cooling medium flowing in each cooling pipe 6, and thus each cooling plate 2 and each cooling pipe 6 are cooled as described above. The water flowing down the front and back surfaces of the plate 2 and the surface of each cooling pipe 6 freezes on the front and back surfaces of each cooling plate 2 and the surface of each cooling pipe 6 to grow into ice of a predetermined thickness. .

When the cold heat of the ice frozen on both the front and back surfaces of each cooling plate 2 is taken out, the supply of the cooling medium to each cooling pipe 6 in each cooling plate 2 is stopped, and the ice making tank is stopped. The water on the bottom of the cooling plate 2 is sent to the spraying pipe 3 by the pump 4 and sprayed on both the front and back surfaces of the upper end of each cooling plate 2 so that the ice on both the front and back surfaces of each cooling plate 2 is melted with water. .

In this case, since the ice on both the front and back surfaces of each cooling plate 2 and the surface of each cooling pipe 6 has a plate shape, the surface area of the ice is substantially independent of the thickness of the ice. Since the ice is constant, when the ice is melted with water sprayed on the upper end of each cooling plate 2 and taken out as cold heat, the amount of the cold heat taken out rapidly increases as the melting of the ice progresses. It is possible to prevent the heat from lowering, and to extract the cold heat to a substantially constant state.

In the above-described configuration, the cooling medium flows through each cooling pipe 6 in each cooling plate 2, so that the thickness of ice growing on both front and back surfaces of each cooling plate 2 and the surface of each cooling pipe 6 is increased. As shown by a two-dot chain line in FIG.
Of each cooling plate 2 and each cooling pipe 6
It tends to become thinner in the portion between.

Therefore, each cooling pipe 6 of each cooling plate 2 is connected between two adjacent cooling plates 2 of each cooling plate 2 by each cooling pipe 6 of one cooling plate 2.
Is arranged in a staggered manner so as to be located between the cooling pipes 6 on the other cooling plate 2, so that the portion where the thickness of the ice is the thickest in each cooling plate 2 and the thickness of the ice It is located at the same height as the thinnest part,
Since the portion where the thickness of the ice is the thickest enters the portion where the thickness of the ice is the thinnest, the interval S between the respective cooling plates 2 is set to be equal to the number of the cooling pipes 6 in the respective cooling plates 2. It is possible to make the cooling plates 2 narrower than when they are provided at the same height.

In the above-described embodiment, a case is shown in which a plurality of cooling pipes 6 are provided by welding only to one of the front and back surfaces of each cooling plate 2 by welding, but the present invention is not limited to this. Instead, as shown in FIG. 5, a plurality of cooling pipes 6 are
A cooling plate provided so as to be alternately fixed to the front and back surfaces of the cooling plate 2 by welding, or as shown in FIG. 6, a plurality of cooling pipes 6 fixed to only one surface by welding. 2 may be arranged side by side so as to be alternately turned over. By configuring as shown in FIGS. 5 and 6, the unit volume in the ice making tank 1 is larger than that in FIG. This can increase the amount of ice per unit.

When taking out the cold heat, the ice on each cooling plate 2 is melted by the water sprayed on the upper end of each cooling plate 2, so that the ice on each cooling plate 2 is Of these, the upper end portion of the cooling plate 2 melts first and disappears. Therefore, the vertical interval P of each cooling pipe 6 in each cooling plate 2 is shown in FIG.
As shown in the figure, the thickness of the ice at the upper end portion of each cooling plate 1 is reduced by narrowing the upper end portion of each cooling plate 2 and gradually increasing toward the lower end of each cooling plate 2. Since the thickness of the ice at the lower end of each cooling plate 2 can be made larger than that at the lower end of each cooling plate 2, it is possible to reliably reduce the possibility that the upper end portion of the cooling plate 2 of the ice in each cooling plate 2 melts first and disappears. Thus, cold heat can be taken out more stably.

Next, FIG. 8 to FIG. 12 show that a cooling plate provided with a cooling pipe is extruded from aluminum instead of providing the cooling pipe to the cooling plate by welding as described above. Shows the case of manufacturing with. That is, FIG.
As shown in FIG. 5, a unit cooling plate 2a having a unit width dimension P integrally provided with a cooling pipe 6a is manufactured by extrusion molding of aluminum, and a plurality of the unit cooling plates 2a are vertically cooled in the unit cooling direction. The plates 2a are arranged so as to be in close contact with each other to constitute one cooling plate 2 'having a plurality of cooling pipes 6a, and a plurality of the cooling plates 2' are, as shown in FIG. In the tank 1, they are arranged side by side substantially in parallel at appropriate intervals of the pitch S.

Thus, the cooling plate 2 'having the plurality of cooling pipes 6a can be manufactured by extruding aluminum, so that the manufacturing cost is reduced as described above by fixing the cooling pipe to welding. In some cases, it can be significantly reduced. In this case, as shown in FIG. 8, instead of forming the unit cooling plate 2a so that the cooling pipe 6a protrudes from the front and back surfaces thereof, as shown in FIG. 10, the cooling pipe 6a 'is formed. Are formed so as to protrude from only one side of the cooling plate 2a 'having the unit width dimension P,
A plurality of the unit width cooling plates 2a 'are arranged in the longitudinal direction such that the unit cooling plates 2a' are in close contact with each other to form one cooling plate 2 "having a plurality of cooling pipes 6a ', and As shown in FIG. 11, a plurality of the cooling plates 2 ″ may be arranged side by side in the ice making tank 1 in a horizontal direction at an interval of a suitable pitch S, or as shown in FIG. Alternatively, it may be configured such that they are alternately turned upside down and arranged substantially in parallel.

Further, the cooling plates 2, 2 ', 2 "and the cooling pipes 6, 6a, 6a' are not limited to being made of metal such as aluminum, but may be made of synthetic resin having thermal conductivity. It goes without saying that other materials may be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a partially cutaway perspective view showing the first embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of FIG. 1;

FIG. 5 is an enlarged view of a main part showing a modification of the first embodiment.

FIG. 6 is an enlarged view of a main part showing another modification of the first embodiment.

FIG. 7 is a longitudinal sectional front view showing a second embodiment of the present invention.

FIG. 8 is a perspective view of a unit cooling plate used in a third embodiment of the present invention.

FIG. 9 is an enlarged view of a main part showing a third embodiment of the present invention.

FIG. 10 is a perspective view of a unit cooling plate used in a fourth embodiment of the present invention.

FIG. 11 is an enlarged view of a main part showing a third embodiment of the present invention.

FIG. 12 is an enlarged view of a main part showing a modification of the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ice-making tank 2, 2 ', 2 "Cooling plate 3 Spraying pipe 4 Circulation pump 5 Water circulation line 6, 6a, 6a' Cooling pipe 7 Cooling medium supply pipe 8 Cooling medium discharge pipe 9 Heat exchanger for taking out cold heat

Claims (3)

[Claims] 1. A plurality of cooling plates extending in the vertical direction are arranged in the ice making tank so as to be substantially parallel to each other at an appropriate pitch in the horizontal direction. On the other hand, while dispersing means for dispersing water is disposed, a cooling medium flows inside each of the cooling plates,
A static ice making device in an ice heat storage system, wherein a plurality of horizontally extending cooling pipes are provided at an appropriate pitch in a vertical direction. 2. A static ice making device in an ice heat storage system according to claim 1, wherein the cooling pipes of each cooling plate are arranged in a staggered manner between the cooling plates. 3. A static ice making system according to claim 1, wherein a vertical interval between each cooling plate and each cooling pipe is narrowed at an upper end of each cooling plate. apparatus.