JP2571127Y2 - Ice nucleus separation device for ice storage system - Google Patents

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 and, more particularly, to an ice nucleus separation device installed in a heat storage tank.

[0002]

2. Description of the Related Art When cooling and heating by circulating cold and hot water stored in a heat storage tank through a water-side heat exchanger of a fan coil unit and a water heat source heat pump unit disposed in a building, the cooling heat during cooling is stored. In recent years, a so-called ice heat storage system for storing ice in a tank has attracted particular attention because a small-scale device can store a large amount of cold heat.

In particular, a technique for storing sherbet-like ice in a heat storage tank has been developed because the IPF (ice filling rate) of the ice heat storage system can be increased to improve the heat storage efficiency. In producing such sherbet-like ice, for example, JP-A-63-217171, JP-A-6-217171
In the technology disclosed in Japanese Patent Application Laid-Open No. 3-231157 and Japanese Patent Application Laid-Open No. 1-1114682, a method and an apparatus for continuously generating supercooled water have already been proposed.

According to these known techniques, supercooled water is continuously discharged into the air from a discharge port of a heat transfer tube of a supercooler, and the discharged flow collides with a supercooling releasing means such as a collision plate to generate an impact. By providing the ice, sherbet-like ice can be continuously and efficiently generated in a slurry state with water (ice / water slurry).

[0005] The subcooler used in the above technology is:
For example, a heat transfer tube through which water flows is disposed in a cooling container, and brine is passed through the refrigerator as a cooling medium in the cooling container, or the cooling container functions as an evaporator of a heat pump device. The superheated water of 0 ° C. or less is discharged from the discharge end of the heat transfer tube.

Using such a supercooler, ice / water slurry is generated from water taken from a heat storage tank for storing heat source water for air conditioning, and supplied to the heat storage tank to store ice / water in the heat storage tank. Since the coexisting ice heat storage method is extremely efficient, it has recently been widely used for air conditioning equipment such as buildings.

However, when water is taken from the heat storage tank of the heat storage system as described above, if the ice nucleus which has already coexisted with the water is taken as it is and supplied to the subcooler, Ice nuclei in the heat storage tank flow into the subcooler when water is taken from the heat storage tank and supplied to the supercooler because ice nuclei may flow into the inside and the supercooler may freeze. Need to be prevented.

[0008] In this respect, for example, Japanese Unexamined Patent Application Publication No.
No. 3, JP-A-4-241251 and JP-A-4-8025, an ice filter is provided in the piping between the heat storage tank and the supercooler. Was to be collected.
Alternatively, Japanese Patent Application Laid-Open No. 4-319236 proposes a method in which water is taken from a heat storage tank during ice storage at a speed lower than the floating speed of ice nuclei through an ice nucleus separator such as a mesh. There, a flat plate is adopted as the mesh shape of the water intake section.

[0009]

[Problems to be Solved by the Invention] When an existing heat storage tank is used as an ice storage tank, a manhole or a communication hole is used as a carry-in entrance into the tank. In addition to being limited in size, processing methods in the tank were also limited in order to protect the waterproof and heat-insulating layer on the inner wall of the tank. However, when a flat mesh is used as the ice nucleus separator, the supporting members and the like need to be assembled in the tank, and the number of members is large because the size of the members that can be carried into the tank is limited. As a result, the number of man-hours for assembling in the tank, which is a closed space, also increases, and a solution has been desired.

The present invention has been made in view of the above-mentioned problems of the prior art.
An object of the present invention is to provide a new and improved ice nucleus separation device for an ice heat storage system which can be easily carried into a tank and can be easily assembled in a closed space.

[0011]

According to a first aspect of the present invention, there is provided a hollow inner cylinder having a side wall formed of a punched plate and having both ends opened, and an inner diameter larger than an outer diameter of the inner cylinder. A hollow outer cylinder having an axial length shorter than the inner cylinder, a side wall formed of a double mesh plate, and a filter medium interposed between the mesh plates, and an outer wall of the inner cylinder. A flange that holds the inner cylinder and the outer cylinder substantially coaxially with a predetermined gap between the inner wall of the outer cylinder and a flange that closes the gap at both ends of the outer cylinder. An ice nucleus separation device for an ice thermal storage tank system is provided.

It is preferable that the open end of the inner cylinder is connected to the open end of the inner cylinder of the device according to the first aspect of the present invention. .

[0013]

According to the first aspect of the present invention, the ice nuclei contained in the water taken from the ice heat storage tank are filtered by the filter material of the outer cylinder, and only the water not containing the ice nuclei passes through the punching holes of the inner cylinder. It flows into the inner cylinder and is taken in as circulating water from its open end. Therefore, it is possible to prevent ice nuclei from flowing into the circulating water during the ice storage operation and being sent to the supercooler. Further, since the structure of claim 1 can be made compact, even if the size of a member that can be brought into the tank is limited, it can be made to be a portable size that is not limited. .

According to the invention of claim 2, since the open end of the inner cylinder can be connected to the open end of a blind plate or another device, the required number of units are connected, and the inner cylinder of the last unit is connected. By simply closing the open end of the device with a blind plate, a necessary large ice nucleus separation device can be easily installed. Also, at this time, the water intake amount of each device becomes substantially uniform due to the resistance of punching of the inner cylinder, and the water intake speed of the outer cylinder of each unit can also be made uniform.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an ice nucleus separating apparatus according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an ice heat storage system in which an ice nucleus separation device according to the present invention can be mounted. 1 is a heat storage tank for storing ice / water slurry, 2 is a supercooler installed outside the heat storage tank, and 3 is a supercooling release pipe for changing the phase of the supercooled water. In the above example, a single tank is used as the heat storage tank 1, but the present invention is applied to a so-called multi-tank type heat storage tank composed of a plurality of small tanks using an underground slab or the like instead. It is also possible.

At the bottom of the heat storage tank 1, an ice nucleus separation device 4 according to the present invention, which is composed of a plurality of units, is installed as described later. The water taken from the ice nucleus separation device 4 is sent to the subcooler 2 via the water intake pipe 5, the water circulation pump 6 and the preheater 7. The water sent to the subcooler 2 is cooled to a supercooling region of about −2 ° C. at the subcooler outlet, and is discharged. The released supercooled water is released from the supercooled state by the supercooled release pipe 3, and a sherbet-like ice / water slurry is generated. The generated ice / water slurry is transferred to the space above the water surface of the heat storage tank via the transfer pipe 8, where it is dropped into water for ice storage.

Next, an embodiment of an ice nucleus separation unit constructed according to the present invention will be described with reference to FIGS. The ice nucleus separation device 4 is configured as units, and each unit is an inner cylinder 10 that is open at both ends.
And an outer cylinder 1 arranged coaxially with the inner cylinder 10.
And the axial length of the outer cylinder 11 is the inner cylinder 1
It is configured to be shorter than the axial length of zero. For example, the axial length of the outer cylinder 11 can be set to about 700 millimeters, and the axial length of the inner cylinder 10 can be set to project from the opposite ends of the outer cylinder 11 by about 100 millimeters. What is important here is that the dimensions are determined according to the state of the heat storage tank to be installed. For example, the unit can be configured as a compact unit that can be easily carried in through an opening such as a manhole.

At the end of the outer cylinder 11, a flange 12 is provided inward in the radial direction.
As a result, a predetermined distance A is formed between the inner wall of the outer cylinder 11 and the outer wall of the inner cylinder 10, and both ends of the distance A are completely defined between the end of the outer cylinder 11 and the outer wall of the inner cylinder 10. It is possible to close. With this configuration, it is possible to introduce water taken in through the outer cylinder 11 into the inner cylinder 10 without leakage.

The wall of the inner cylinder 10 is formed of a punching plate 13 made of, for example, stainless steel, and has, at both ends thereof, the open end or blind plate 14 of the inner cylinder of a separate unit as shown in FIG. Can be connected. By employing the punching structure in this manner, the water intake amount can be made constant by the resistance of the punching, and even when a plurality of units are connected, the water intake speed in the outer cylinder of each unit can be made uniform.

The wall of the outer cylinder 11 has an inner mesh 15
And the outer mesh 16 has a double structure,
A simple filter medium 17 is interposed between them. With such a structure, ice nuclei contained in the tank are filtered by the filter medium 17 interposed between the double meshes 15 and 16, and circulating water containing no ice nuclei is provided between the outer cylinder 11 and the inner cylinder 10. It is possible to introduce. The circulating water introduced at the interval A in this manner is supplied to the inner cylinder 10 through the punching 13.
And is sent to the intake pipe 5.

In the illustrated example, the inner and outer meshes 15 and 16 are reinforced by an axial support 18 and a circumferential support 19, respectively. Further, a radial support 20 is appropriately disposed between the outer cylinder 11 and the inner cylinder 10 to maintain the above-mentioned distance A.

FIG. 5 shows an embodiment in which the ice nucleus separating unit constructed as described above is installed in the heat storage tank 1. Although three units are installed in the illustrated example,
The number of units installed in the tank can be calculated from the outer cylindrical area per unit, water intake flow rate, required suction speed, and the like.

As shown in the figure, the required number of ice nuclei separating units loaded from an appropriate loading port are connected with commercially available one-touch joints at the open ends of the inner cylinders of each unit. At this time, one of the connected ends is a blind plate 14.
And the other end is connected to the water intake pipe 5. As described above, the ice nucleus separation unit constructed according to the present invention can be installed in the tank by a very simple operation. In addition, according to the structure of the present invention, the water intake amount of each device becomes substantially the same due to the resistance of the punching of the inner cylinder of each unit, and as a result, the water intake speed of the outer cylinder of each unit can be equalized.

[0025]

According to the present invention, as described above, the ice nucleus separation unit is configured as a portable unit even in a tank, and the required number of units are simply connected in the tank. Since it can be assembled in a very simple operation process, the number of operation steps under bad operation conditions such as a closed space is reduced.

[Effect of the invention] [Brief description of the drawings]

FIG. 1 is a schematic diagram of an ice heat storage system in which an ice nucleus separation device according to the present invention can be mounted.

FIG. 2 is a partial perspective view of an ice nucleus separation unit configured according to the present invention;

FIG. 3 is a side view of an ice nucleus separation unit configured according to the present invention;

FIG. 4 is a cross-sectional view of an ice nucleus separation device unit configured according to the present invention.

FIG. 5 is an explanatory view showing an installation state of an ice nucleus separation unit configured according to the present invention in a tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermal storage tank 2 Subcooler 3 Subcooling release pipe 4 Ice nucleus separation device 10 Inner cylinder 11 Outer cylinder 12 Flange 13 Punching plate 14 Blind plate 15 Inner mesh 16 Outer mesh 17 Filter media

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuyoshi Yoshida 1-3-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Inside Tokyo Electric Power Company (72) Inventor Yoshiteru Seki 1594-7 Arakawa-oki, Ami-cho, Inashiki-gun, Ibaraki Prefecture Inventor Akihiko Okamura 1-629-1 Mitsuhashi, Omiya City, Saitama Prefecture 2-202, Green Park Omiya 2-202 (72) Inventor Mitsuru Moriya 4-6-1, Iriya, Zama City, Kanagawa 1-12-118, Higashi-Kenza Heights (56) References Japanese Utility Model 2-527 (JP, U) Japanese Utility Model 2-41018 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A hollow inner cylinder having a side wall made of a punched plate and open at both ends, an inner diameter larger than an outer diameter of the inner cylinder, an axial length shorter than the inner cylinder, and a side wall. Consists of a double mesh plate, a hollow outer cylinder having a filter medium interposed between the mesh plates, and the inner cylinder with a predetermined space between the outer wall of the inner cylinder and the inner wall of the outer cylinder And a flange that holds the outer cylinder substantially coaxially and a flange that closes the gap at both ends of the outer cylinder. 2. The open end of the inner cylinder of the device according to claim 1, wherein the open end of the inner cylinder is connectable to a blind plate or a separate plate for closing the open end. Item 10. The ice nucleus separation device according to Item 1.