KR200294590Y1 - Cylinderical Freezing-Capsule for Ice Thermal Storage System - Google Patents

Abstract

The present invention provides a cylindrical freezing container of the same height and diameter that can have a larger volume per unit volume than a spherical shape, giving curvature to the upper and lower surfaces of the cylindrical freezing container, and concave along the side of the cylindrical freezing container. By forming a portion and a protrusion to allow the antifreeze to circulate evenly on the entire surface of the cylindrical freezing container, and provides a freezing container that can respond when the freezing liquid is frozen and expanded.

Description

Cylindrical freezing container for ice heat storage system {Cylinderical Freezing-Capsule for Ice Thermal Storage System}

The present invention relates to a freezing container for use in ice heat storage system for using the midnight power. More specifically, it has a cylindrical shape to improve the ice filling rate per unit volume. Also, the upper and lower surfaces are curved, and recesses and protrusions are formed on the side to freeze the antifreeze to easily circulate the outer surface of the ice container. And it relates to a cylindrical ice container with improved thawing capacity.

In general, the ice heat storage system refers to a heat storage heat exchange system that uses a low-cost electricity at midnight to operate the freezer to freeze the ice, preserve it, and then thaw the ice during the daytime for cooling.

The principle of the ice storage system, first, using a cheap night power to operate the freezer in the night time zone to cool the antifreeze (Brine, brine), and passing it through the ice storage tank accommodating a plurality of freezing containers to transfer the freezing liquid contained in the freezing container Freezes on ice.

During the day time, while passing through the ice storage tank, the antifreeze cooled by the ice freezing liquid is transferred to water or air through a heat exchanger to cool the building, thereby reducing or avoiding the use of cooling power during high power consumption days. Can be.

Therefore, in order to reduce the installation space and reduce the installation cost of the ice heat storage system, it is required to increase the amount of ice in the ice heat storage tank as much as possible, that is, to increase the ice packing factor (IPF). Accordingly, studies have been made to ensure that the shape of the freezing vessel accommodated in the ice storage tank has the maximum ice storage rate. The conventional freezing container is generally spherical shape as shown in Fig. 8 (a), the dimple 20 is formed in consideration of the volume expansion of about 10% during the freezing of the freezing liquid. In addition, (b) of FIG. 8 is a Patent No. 96-8238, which also has a spherical shape, and has two depressions 21 to increase the surface area to improve the freezing and thawing ability. However, since they are all spherical, the ice filling rate is lower than that of the cylindrical phase because the volume to accommodate the freezing liquid is about 67% compared to the cylindrical phase. In addition, when the freezing container having a depression is processed into a blow molding (blow), the shrinkage is repeated because the connection portion of the depression and the spherical surface is formed relatively thinner than other parts due to the severe curvature change due to the blow molding characteristics Due to overswelling, there is a weak problem with fatigue.

In addition, despite the fact that the cylindrical freezing container has a higher ice filling rate than the old freezing container, since the cylindrical freezing container is not used in the related art, since the upper and lower portions of the cylindrical freezing container are flat, the antifreeze flowing through the freezing containers (Brine) This is because the circulation of is uneven compared with the spherical shape, and it is difficult to have a structure that can accommodate the volume expansion during freezing.

In order to solve the above problems, the present invention provides a cylindrical icing container of the same height and diameter that can have a larger volume per unit volume than a spherical shape, thereby reducing the size of the heat storage tank and reducing the installation area and reducing the installation cost. The purpose is to make it possible.

In addition, the present invention gives a curvature to the upper and lower surfaces of the cylindrical ice container, can form a concave portion and a convex portion along the side of the cylindrical ice container to respond to the circulation of the antifreeze and the expansion of the freezing liquid, along the outer surface of the ice container An object of the present invention is to smoothly flow the antifreeze flowing to improve the freezing and thawing ability.

In addition, an object of the present invention is to enable the plug to be ultrasonically fused and sealed, thereby preventing the leakage of freezing liquid.

In addition, the present invention aims to improve the freezing and thawing ability by having the stopper having a heat transfer facilitating portion and a branch extending to the center of the body portion, so that the freezing and thawing together outside and inside the body portion.

1 is a perspective view showing a freezing container of the capsule-type ice heat storage system according to the present invention;

2 is a cross-sectional view of the ice container of Figure 1;

3 is a cross-sectional view of an ice container of another embodiment according to the present invention;

4 is a view for calculating the filling rate per unit volume for the shape of the cylindrical ice container;

5 is a view for calculating the filling rate per unit volume for the shape of the spherical ice container;

6 is a perspective view showing a stopper formed to correspond to an opening formed in an upper surface of the body portion and an enlarged cross-sectional view showing a shape coupled to the body portion;

7 is a cross-sectional view of another stopper according to the present invention mounted to the body portion; And

8 (a) and 8 (b) are perspective views showing a conventional spherical ice container.

<Description of the symbols for the main parts of the drawings>

1 body portion 2 top surface

3: lower surface 4: first recessed portion

5, 6: second recessed portion 9: protrusion

10: stopper 11: bottom surface of the stopper

12: extension part of the stopper 13: protrusion of the stopper

14: heat transfer promoting portion 15: branch portion

In order to achieve the above object, the present invention is a freezing container having a hollow portion for filling the freezing liquid therein for use in a capsule-type ice heat storage cooling system, the body portion has a cylindrical shape of the same height and diameter; The upper and lower surfaces of the body portion have a curved shape to smoothly flow the antifreeze; In addition, there is provided a freezing container, characterized in that the first concave portion is formed to facilitate volume expansion during freezing along the circular side surface of the body portion.

In addition, the present invention has a second concave portion for facilitating the flow of the antifreeze is formed in the connection portion between the first concave portion and the upper and lower surfaces formed on the body portion, the projection protruding outward in the center of the first concave portion The freezing container is arranged in the ice storage tank and adjacent to the freezing container in the side of each other so that when the first concave contact, the gap is formed by the projection between the sides of the freezing container to facilitate the flow of antifreeze. It provides a freezing container characterized by.

In addition, the present invention provides an icy container, characterized in that the upper surface of the body portion is formed with an opening for injecting the icing liquid into the hollow portion, and further comprising a stopper for sealing the opening after the icing liquid is added. .

In addition, the stopper of the present invention provides a freezing container characterized in that the lower surface has a protrusion in the circumferential direction is melted during ultrasonic sealing to be fused to the opening, and the stopper from the lower surface of the stopper to the center of the body portion Heat transfer facilitating unit and extends integrally with the branch, and branched radially branched from the heat transfer facilitator to further promote heat transfer at the same time inside and outside the freezing container during freezing and thawing to promote freezing and thawing Provide ice container.

Hereinafter, the configuration and operation of the present invention will be described with reference to the drawings.

1 is a perspective view showing a freezing container of the capsule-type ice heat storage system according to the present invention, Figure 2 is a cross-sectional view of the freezing container of Figure 1, Figure 3 is a cross-sectional view of a freezing container of another embodiment according to the present invention. 4 and 5 are diagrams for calculating the filling rate per unit volume for the shape of the cylindrical and spherical ice container.

First, referring to FIG. 4 and FIG. 5, the filling rate per unit volume (IPF) for a cylinder and a sphere is as follows. In general, the filling rate is determined by the volume of the freezing vessel per unit surface area. In the case where a cylindrical freezing container is filled in a cube with one side a, and a spherical freezing container is filled with a face-centered cube or a body-centered cube, the filling rates are as follows.

First, assuming that this is also cylindrical, the total volume of the unit space V, the volume V _cap of the cylindrical freezing container, when present inside a cube as shown in 4 (a),

(Equation 1)

(Equation 2)

Where the V ' _cap is the volume of the central cylindrical ice container and the V " _cap is the volume of the ice container on four sides.

(Equation 3)

Referring to Figure 4 (b) to obtain the V " _cap ,

, (Equation 4)

, (Eq. 5)

`` (Equation 6)

(Eq. 7)

(Eq. 8)

(Eq. 9)

(Eq. 10)

(Eq. 11)

ACB has a radius Of circle Therefore, the area of the fan-shaped AEBC Becomes

(Eq. 12)

Therefore, the extent of the fan-shaped AEBD

Becomes

Since the fan-shaped AEBD exists at the four corners of the unit volume, the total volume is

Becomes

therefore, (Eq. 13)

Therefore, the filling rate per unit volume for the cylinder is

to be.

In addition, in the case of a spherical ice container filled in a body-centered cubic shape as shown in Fig. 5 (a), if the radius of the ice container contained in the unit space is R,

(Eq. 14)

therefore, Has a relationship with

If the total volume V of the unit space is represented by R,

(Eq. 15)

Since all four freezing containers in the unit space are four, the volume V _cap of the freezing container is

(Eq. 16)

Therefore, the filling rate for spherical bodies filled with body centered cubic

Becomes

In addition, in the case of the spherical ice container filled in the face-centered cubic shape as shown in Fig. 5 (b), if the radius of the spherical ice container in the unit space is R,

(Eq. 17)

therefore, Has a relationship with

If the total volume V of the unit space is represented by R,

(Eq. 18)

Since there are two freezing containers in the unit space, the volume V _cap of the freezing container is

(Eq. 19)

Therefore, the filling rate for the sphere filled with face centered cubic is

Becomes

As such, it can be seen that the filling rate per unit volume of the cylindrical freezing container is about 92.85%, which is higher than the spherical freezing container. Thus, the use of cylindrical freezing vessels can have more ice heat storage per unit volume, which is advantageous in design and volume. The present invention was designed to improve the ice filling rate by making the body portion 1 into a cylindrical shape.

1 and 2, the ice container according to the present invention may be characterized by a body portion 1 having a cylindrical shape. The body portion 1 blows HDPE (High Density Polyethylene) to form a hollow portion 8 for filling the freezing liquid therein. Freezing containers should be used for as long as possible once they are filled in ice storage tanks. In general, HDPE is known to have good physical properties at low temperatures, but repeated expansion and contraction of the container may cause cracking due to fatigue stress. . Therefore, it is preferable to use HDPE material which is as excellent in fatigue resistance as possible.

In addition, in order to increase the efficiency and cooling capacity of the freezer by reducing the heat resistance in the freezing container during freezing and thawing, the distance from the surface of the freezing container to the center is preferably the same in the overall shape. The height of the body 1 and the diameter (a) of the circumference were the same so that the distance from the upper and lower surfaces and the side to the center was the same. In addition, it is preferable that the thickness of the container is uniformly formed with respect to the entire body 1 as much as possible so that heat transfer occurs evenly over the whole.

In addition, the upper surface (2) and the lower surface (2) of the cylindrical body portion 1 was to have a curved surface. When a cylindrical cylinder having a general shape is placed in an ice storage tank, the upper and lower portions of adjacent freezing vessels contact each other, thereby reducing the surface area and causing a problem that the flow of the antifreeze is not smooth on the entire surface. However, the present invention, when the antifreeze flows while the antifreeze flows to the outer surface of the body portion 1 accommodated in the ice heat storage tank, because the upper and lower surfaces (2, 3) of the cylindrical body portion 1 is formed in a curved surface, the antifreeze is The upper surface (2) and the lower surface (3) was allowed to flow smoothly along the surface. In this way, the antifreeze flows evenly over the entire surface of the cylinder so that freezing and thawing occur at a constant speed on the entire surface of the freezing vessel. In addition, an opening 7 for injecting an icing liquid is formed in the center of the upper surface 2.

In addition, as shown in FIGS. 1 and 2, a side surface of the body portion 1 is formed with a first recessed portion 4 recessed with a constant curvature in the center direction of the body portion 1 along the circumferential direction. have. When the icing liquid to be accommodated inside the body portion 1 expands upon freezing, the first concave portion 4 expands together to secure a free space for expanding the freezing liquid.

The second concave portions 5 and 6 are formed along the circumference of the body portion 1 at the portion where the first concave portion 4 and the curved surfaces of the upper and lower surfaces 2 and 3 are connected. It is preferable that the recessed depth of (5, 6) is smaller than the depth of the said 1st recessed part 4, and it is preferable that the curvature of a 2nd recessed part is also smaller than the curvature of a 1st recessed part. In the conventional cylindrical shape, when the two are in contact with each other on the side, there is no gap in which the antifreeze flows, so that heat transfer is not active in the contact surface. However, the present invention has the second concave portions 5 and 6 like the curved surfaces of the upper and lower surfaces 2 and 3, so that even when two or more freezing containers are in close contact with each other, the second concave portions ( 5, 6) to form a gap through which the antifreeze can flow to have a smooth flow.

In addition, referring to FIG. 3, which shows another embodiment of the present invention, a protrusion 9 protruding outward in the circumferential direction is formed at the center of the first concave portion. The protruding portion 9 is arranged in the ice storage tank of the present invention to be alternately arranged at a predetermined angle in the ice storage tank so that the sides formed with the first concave portions are in close contact with each other, between the frost containers adjacent to each other in the side. A gap is formed so that the antifreeze can easily flow between the icing vessels through the gap.

6 is a perspective view showing a stopper 10 formed to conform to the opening 7 formed in the upper surface 2 of the body portion 1 and a cross-sectional view showing a shape coupled to the body portion.

Referring to (a) and (b) of Figure 6, the stopper 10 is formed in the center of the lower surface 11 of the cylindrical extension portion 12, the outer diameter of the extension portion 12 is The inner diameter of the opening 7 of the body portion 1 is engaged to prevent the icing liquid filled in the body portion 1 from leaking. In addition, the lower surface of the stopper 10 is formed with a protrusion 13 protruding from a position spaced apart from the extension portion 12 by a predetermined interval, the protrusion 13 is fused at the time of ultrasonic sealing is the opening 7 And the stopper is integrally coupled to the upper surface (2) of the body portion (1) to prevent the leakage of the icing liquid once again. In general, it is preferable to use the same HDPE as the material of the body part 1 for the fusion sealing of the stopper.

7 is a cross-sectional view showing a freezing container according to the present invention combined the stopper of another embodiment. Referring to FIG. 7, the heat transfer facilitator 14 extending from the extension part 12 of the stopper 10 extends to the inside of the body part in a cylindrical shape having a diameter smaller than the stopper 10. In addition, at least one branch portion 15 branched from the heat transfer promoting portion 14 is formed. Since the heat transfer facilitating portion 14 and the branch portion 15 are installed in the freezing container, the freezing container is made to promote freezing and thawing inside the body part through the heat transfer facilitating portion and the branching part when freezing and thawing. It is possible to improve the freezing and thawing ability by allowing the freezing and thawing to proceed simultaneously inside and outside of the.

Referring to the operation of the present invention with the above configuration as follows.

When the ice container of the present invention is used, water or an appropriate cold heat preservation ice liquid is injected through the opening 7, and then a stopper 10 is inserted to prevent the ice liquid from leaking. Thereafter, the protrusions 13 formed on the lower surface of the stopper 10 are melted by ultrasonic sealing so that the lower surface of the stopper 10 is fusion-sealed to the upper surface of the opening 7 and the body part 1.

As described above, the freezing container injecting the freezing liquid is contained in the ice storage tank, and the antifreeze flows to the outside of the freezing container. The ice container of the present invention is formed in a cylindrical shape to increase the ice filling rate per unit volume. When the ice storage system is activated and the antifreeze liquid of the low temperature state flows through the freezer, the upper and lower surfaces (2, 3), the second concave portions (5, 6), and the protrusions of the curved body portion (1) The antifreeze flows along 9) to allow heat transfer to the surface of the body portion 1 evenly. In addition, the second concave portions 5 and 6 can form a gap even when the freezing containers are in contact with each other, so that the flow of the antifreeze can be smoothly performed. In addition, the protruding portion 9 may form a gap when the icing containers are alternately arranged at a predetermined angle so that the first concave portions of the adjacent icing containers abut, thereby facilitating the flow of the antifreeze. Thus, the icing liquid inside the body 1 is heat-exchanged evenly over the entire surface of the antifreeze and the icing container to be frozen.

When freezing occurs inside the body portion 1, the volume of the freezing liquid is expanded, and thus the first concave portion 4 is inflated to accommodate the expansion of the freezing liquid. Thereafter, even when the ice container is thawed during the day time, the upper and lower surfaces 2 and 3, the second concave portions 5 and 6, and the protruding portion 9 of the body portion 1 having a curved surface as in the case of the above-mentioned freezing. By the antifreeze flows easily to the gap formed between the adjacent freezing containers so that the heat transfer evenly to the surface of the body portion (1).

In addition, when the stopper 10 of another embodiment of the present invention is used, not only the surface of the body part 1 but also the inside of the body part 1 through the heat transfer facilitating part 14 together with the outside and freezing and thawing. This makes it possible to speed up the freezing and thawing more.

The present invention provides a cylindrical ice container having the same height and diameter that can have a larger volume per unit volume than a spherical shape, thereby reducing the size of the heat storage tank and reducing the installation area and reducing the installation cost.

In addition, the present invention gives a curvature to the upper and lower surfaces of the cylindrical ice container, can form a recess and a projection along the side of the cylindrical ice container to respond to the circulation of the antifreeze and the expansion of the freezing liquid, along the outer surface of the ice container It can improve the freezing and thawing ability by smoothing the flow of the antifreeze flowing.

In addition, the present invention can prevent the leakage of the icing liquid by making the stopper ultrasonic sealing.

In addition, the present invention has a heat transfer promoting portion and the branch portion extending to the center of the body portion in the stopper, it is possible to improve the freezing and thawing ability by making the freezing and thawing together outside and inside the body portion.

Claims (6)

A freezing container having a hollow portion for filling a freezing liquid therein for use in an encapsulated ice heat storage cooling system, The body portion has a cylindrical shape of the same height and diameter; The upper and lower surfaces of the body portion have a curved shape to smoothly flow the antifreeze; A freezing container characterized in that the first concave portion is formed to facilitate volume expansion during freezing along the circular side of the body portion. The method of claim 1, And a second concave portion for facilitating the flow of the antifreeze is formed in the connection portion between the first concave portion and the upper and lower surfaces formed on the body portion. The method of claim 2, Ice container formed in the center of the first concave portion formed in the body is formed with a protrusion protruding outward. The method according to claim 2 or 3, The upper surface of the body portion is formed with an opening for injecting the freezing liquid into the hollow portion, the freezing container characterized in that it further comprises a stopper for sealing the opening after injecting the freezing liquid. The method of claim 4, wherein The stopper is provided with a protruding portion in the circumferential direction on the lower surface to melt during ultrasonic sealing to melt in the opening to be fused. The method of claim 4, wherein And a heat transfer facilitator integrally extending from the lower surface of the stopper to the center of the body part, and a branch branched radially from the heat transfer facilitator.