JPH05157475A - Ice cold accumulator - Google Patents

Abstract

(57) [Summary] [Purpose] I. P. Improve F and downsize the heat storage tank. [Structure] A solution W serving as a heat storage medium is stored in a heat storage tank 2, and a cooling pipe 3 having a large number of parallel linear portions D1, D2, ... Is immersed in the solution W. Each straight part D1, of the cooling pipe 3
A partition member 5 for partitioning the surrounding spaces of D2, ... Is provided to prevent free circulation of the solution W in each surrounding space. As a result, by utilizing the drop in the freezing temperature due to the increase in the solute concentration in the surrounding space as the ice grows, the ice thickness in each straight line portion D1, D2, ... P. F. Improve. When the straight line portions D1, D2, ... Are staggered and the partition member is formed in a honeycomb shape, the effect is particularly great.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an ice heat storage device in which a solution serving as a heat storage medium in a heat storage tank is frozen to store cold heat.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 62-2200.
As disclosed in Japanese Patent Laid-Open No. 42-42, as shown in FIG. 5, a large number of parallel straight line portions (d1, d2, ...) In a heat storage tank (a) which stores a solution (w) serving as a heat storage medium. ) Is immersed in the cooling pipe (b), heat is exchanged with the refrigerant to grow ice around the cooling pipe (b) to store cold heat, and
In order to prevent damage to the cooling pipe (b) due to the ice (i) grown between adjacent straight line portions (d1, d2, ...) Of the cooling pipe (b) adhering to each other and becoming frozen. A temperature sensor (c) for detecting the iced state is arranged on the side facing the two straight portions with a predetermined gap, and the cold storage is stopped when the thickness of the ice reaches a thickness corresponding to the gap. This is a known technique.

[0003]

However, in the case of using the cooling pipe provided with a large number of parallel portions which are parallel to each other as in the conventional case, there are the following problems.

That is, since the temperature at the inlet side of the refrigerant becomes lower than that at the outlet side, the ice thickness becomes large, and the inlet side freezes before the outlet side. Therefore, in order to prevent the damage of the cooling pipe (b) due to such freezing, the temperature sensor (c) needs to be attached to the straight portion on the inlet side where the ice grows quickly. ) At the stage when the cold storage is stopped according to the signal, the growth of ice on the outlet side is not progressing so much. And, due to such non-uniformity of ice thickness, so-called I.D. P. F. There was a problem that (the index that should be called the icing rate) cannot be made sufficiently large.

The present invention has been made in view of the above points, and an object thereof is to provide I.V. by taking measures to promote uniform ice thickness in each straight portion of a cooling pipe. P. F.
Is to improve.

[0006]

Means for Solving the Problems To achieve the above object, the means taken by the invention of claim 1 is, as shown in FIG. 1, a heat storage tank (2) in which a solution as a heat storage medium is stored. Is provided with a cooling pipe (3) having a large number of straight line portions (D1, D2, ...) In parallel with each other, and a heat medium for cooling is circulated through the cooling pipe (5). The target is an ice heat storage device that grows ice on the surface and stores ice heat.

Then, each straight line portion (D) of the cooling pipe (3) is
A partition member (5) for partitioning the surrounding space of 1, D2, ...) Is provided.

As shown in FIG. 4, the means taken by the invention of claim 2 arranges the straight portions (D1, D2, ...) Of the cooling pipe (3) in the invention of claim 1 in a staggered manner. The partition member (5) is formed in a honeycomb shape.

[0009]

With the above construction, in the invention of claim 1, when ice grows in each straight line portion (D1, D2, ...),
As the ice grows, the solute in the solution (W) is diffused at the solid-liquid interface, resulting in a concentration gradient in which the solute concentration on the liquid side becomes large.
At that time, since the peripheral space of each straight line portion (D1, D2, ...) Is partitioned by the partition member (5), the diffusion of the solute increased in each peripheral space is hindered. Therefore, the solute is gradually concentrated in the remaining liquid in the space around the straight portion where the low-temperature heat medium flows and the ice grows rapidly, and the ice temperature decreases due to the increase in the solute concentration. That is, as the ice grows, the icing speed in the straight line portion slows down, so that the thickness of the ice in each straight line portion (D1, D2, ...) becomes uniform, and such an ice thickness becomes uniform. By I.
P. F. Will increase.

According to the second aspect of the present invention, the straight portions (D1, D2, ...) Of the cooling pipe (3) are arranged in a zigzag pattern, and the partition member (5) is formed in a honeycomb shape. The space around the parts (D1, D2, ...) Is minimized, and the solute diffusion preventing effect becomes remarkable.

[0011]

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

FIG. 1 shows the structure of an ice heat storage device (1) according to an embodiment of the present invention. The ice heat storage device (1) is for performing cold heat storage using late-night power of an air conditioner. .. In the figure, an aqueous solution (W) serving as a heat storage medium is stored in a heat storage tank (2), and a cooling pipe (3) through which a refrigerant of an air conditioner circulates in the aqueous solution (W) and the extraction of heat storage. The tube (4) is immersed. The cooling pipe (3) is composed of a substantially circular pipe, and is provided at one end (3) of the heat storage tank (2).
After being introduced into the heat storage tank (2) from a) and folded so as to have a large number of linear portions (D1, D2, ...) That extend in the vertical direction in parallel to each other, the heat storage tank (2) is fed from the other end (3b). ) It is led out to the outside and a plurality of heat storage tanks (2) are arranged side by side in the width direction. Then, one end (3
Although not shown, a) is connected to the condenser of the refrigerant circuit via the pressure reducing mechanism, and the other end (3b) is connected to the compressor, and the refrigerant whose pressure is reduced by the pressure reducing mechanism is cooled by the cooling pipe (3). Evaporation causes heat exchange with the aqueous solution (W) to grow ice around the cooling pipe (3).

The take-out pipe (4) is a heat storage tank (2).
Although not shown, one end of the cooling pipe (3) is connected to the condenser, and the other end is connected to the evaporator via a pressure reducing mechanism. This liquid refrigerant is supercooled by the cold heat of the heat storage tank (2) and sent to the evaporator.

Here, as a feature of the present invention, the cooling pipe (3) is provided with a partition member (5) made of a fluorocarbon resin for partitioning the surrounding spaces of the straight portions (D1, D2, ...) From each other. Has been. 2 and 3 show a method of attaching the partition member (5) to the cooling pipe (3), and the cooling pipe (5) is
The partition member (5) is provided with U-shaped tubes (3k) each having two linear portions (Dk1, Dk2), and the partition member (5) is provided with hexagonal tubular members (5k1, 5k2). Then, the tubular members (5k1, 5k2) are connected to the linear portions (3k1, 3k) of the U-shaped tube (3k).
k2) and then a fluorocarbon fastener (6k
1,6k2) through each straight part (Dk) of the U-shaped tube (3k)
Both are fixed so that 1, Dk2) are located at the centers of the tubular members (5k1, 5k2). After that, by connecting the upper ends of the U-shaped pipes (5k, ...) With small U-shaped pipes (R1, R2, ...), the U-shaped pipes were folded to have a large number of straight line portions (D1, D2, ...). It is designed to form one cooling pipe (3). In addition, (7k1, 7k2) in the figure are adjacent tubular members (5
These are notches for avoiding interference with the fasteners (6k1, 6k2) of (k1, 5k2).

As shown in FIG. 4, a plurality of cooling pipes (3) as described above are attached so that the respective straight portions (D1, D2, ...) Are arranged in a zigzag manner, and A honeycomb-shaped partition member (5) for partitioning the surrounding space of each straight line portion (D1, D2, ...) Of 5) is formed.

Incidentally, (Th) is attached to one tubular member of the partition member (5), and when the thickness of ice growing on a straight line portion of the cooling pipe (3) reaches a predetermined thickness, the cold storage operation is stopped. A temperature sensor that outputs a signal.

In the above embodiment, since the surrounding space of each straight line portion (D1, D2, ...) Of the cooling pipe (3) is partitioned from each other by the partition member (5), the following operation is performed during the cold storage operation. Occurs.

That is, in each straight line portion (D1, D2, ...) As the ice grows, diffusion of the solute in the aqueous solution (W) occurs at the solid-liquid interface as the ice grows, and the solute becomes the liquid. The solute concentration on the liquid side becomes large because the solute is removed to the side. then,
As in the prior art, when the space around each straight line portion (D1, D2, ...) Is free to flow the aqueous solution (W), the solute is diffused in the aqueous solution (W) and the solute concentration is made uniform. ..

In the present invention, the straight line portions (D1, D2,
Since the surrounding space of (...) Is partitioned by the partition member (5), diffusion of solute as described above is hindered. Therefore, in the surrounding space where the low-temperature refrigerant flows and the ice grows rapidly, the solute is gradually concentrated in the remaining liquid, and the ice temperature is lowered due to the increase in the solute concentration. Since the freezing speed of the straight line portion is slowed down by the decreasing action of the freezing temperature, the ice thickness in each straight line portion (D1, D2, ...) Is made uniform. And by such uniform ice thickness,
I. P. F. The heat storage tank (2) can be downsized.

In the above embodiment, the partition member (5) has a honeycomb shape, but the partition member (5) of the present invention is not limited to this shape, and each of the cooling pipes (3) is not limited thereto. It goes without saying that a square shape or the like may be used depending on the arrangement shape of the straight line portions (D1, D2, ...). However, by adopting a honeycomb arrangement, each straight line portion (D) of the cooling pipe (3) is
1, D2, ...) can be minimized, so the solute diffusion prevention effect becomes remarkable, and the cooling pipe (3) can be housed precisely, so the heat storage tank (2) can be made smaller. Become.

In the above embodiment, the linear portions (D1, D2, ...) Of the cooling pipe (3) are vertically extended, but the present invention is not limited to this embodiment.
You may make it have many linear parts extended in a horizontal direction.

[0022]

As described above, according to the first aspect of the invention, a cooling pipe having a large number of straight line portions parallel to each other is provided in a heat storage tank for storing a solution serving as a heat storage medium for cooling. Since an ice storage device that grows ice on the surface of the pipe to store ice heat is provided with a partition member that partitions the surrounding space of each straight part of the cooling pipe from each other, it is removed to the surrounding space as the ice grows. By interfering with the diffusion of solutes, it is possible to lower the icing temperature in the ice growth and promote the homogenization of the ice thickness, and thus I. P. F. It is possible to reduce the size of the heat storage tank by improving the temperature.

According to the invention of claim 2, in the invention of claim 1, the linear portions of the cooling pipe are arranged in a zigzag pattern, and the partition member is formed in a honeycomb shape. The solute diffusion hindrance effect due to the minimization can be remarkably exhibited.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the structure of an ice heat storage device according to an embodiment.

FIG. 2 is a perspective view showing a fixed state of a cooling pipe and a partition member.

FIG. 3 is a perspective view showing a method of attaching a partition member to a cooling pipe.

FIG. 4 is a plan view showing an arrangement state of cooling pipes and partition members.

FIG. 5 is a plan view showing a growth state of ice in a conventional ice heat storage device.

[Explanation of symbols]

 1 Ice heat storage device 2 Heat storage tank 3 Cooling pipe 5 Partition member D1, D2 Straight part

Claims (2)

[Claims] 1. A plurality of straight line portions (D1, D2, ...) Parallel to each other in a heat storage tank (2) in which a solution as a heat storage medium is stored.
An ice heat storage device in which a cooling pipe (3) having a cooling pipe (3) is disposed, and a cooling heat medium is circulated through the cooling pipe (5) to grow ice on the surface of the cooling pipe (3) to store ice heat. The ice heat storage device according to claim 1, further comprising a partition member (5) for partitioning the surrounding space of each straight line portion (D1, D2, ...) Of the cooling pipe (3). 2. The ice making device according to claim 1, wherein the straight portions (D1, D2, ...) Of the cooling pipe (3) are arranged in a staggered manner, and the partition member (5) is formed in a honeycomb shape. An ice making device characterized in that