JPH08114340A - Ice heat storage device - Google Patents

Abstract

PURPOSE: To provide an ice heat storage device, utilizing an ice making efficiency due to supercooling, which is higher compared with direct contact heat exchange, capable of making ice continuously without bothering the ice making due to the adhesion and growth of ice on a releasing plate and stabilized. CONSTITUTION: An ice heat storage device is provided with a heat storage tank 1, a supercooler 4, cooling water to a supercooled condition, a communicating unit 1a, connecting the supercooler 4 to the heat storage tank 1, a circulating line for supplying water in the heat storage tank 1 into the supercooler 14, second liquid 8, having a solidifying point, lower than water, effecting heat exchange in the supercooler 4, never being mixed and combined with each other and insoluble, an injecting means 6, injecting the second liquid 8 into the half way of the communicating unit, a pump 2, circulating the second liquid 8 from a reserving unit to the supercooler 4, and a refrigerating means 3 whereby continuous ice making becomes possible.

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 device used in an air conditioning system.

[0002]

2. Description of the Related Art In a system having a conventional heat storage device, for example, in order to reduce the demand for cooling power load concentrated in the daytime, the load of heat source equipment is reduced by using inexpensive late-night power, and building air conditioning and local It is suitable for relatively large capacity air conditioning systems that supply heat. Among them, an air conditioning system having an ice heat storage device using water as a heat storage medium and utilizing latent heat of ice has been actively developed, and some have been put into practical use.

By the way, as a method for producing ice, a fluorine-based insoluble liquid having a specific gravity of 1.7 to 1.8 is used as a heat medium, and this heat medium is cooled to 0 ° C. or less by a refrigerator and directly mixed with water in water. The method of producing ice by contacting the water and -1
There is a method in which ice is generated by applying an impact to the supercooled water in a supercooled state of up to -2 ° C and releasing the supercooled state.

In both cases, the ice produced forms a fine ice plate. On the other hand, in the ice making by direct contact heat exchange, it is possible to continuously produce ice by constantly contacting with water at 0 ° C, and in the other ice making by supercooling, the amount of ice produced per unit volume is the direct contact heat. Compared with replacement, it has many characteristics that ice making efficiency is high.

[0005]

However, in practical use, the following problems occur, and therefore there is a point to be improved in maintaining a normal and stable state. That is, in ice making by supercooling, as means for canceling the supercooled state, the supercooled water is released into the air and applied to the release plate to release, but when the supercooled water is applied to the release plate, the release plate is released. There is a problem that the ice generated after the supercooling is released successively lands on the ice, and eventually the ice grows to reach the discharge portion of the supercooled water and the ice making is stopped.

The present invention has been made in order to solve the above problems, and its purpose is to use higher ice making efficiency than direct contact heat exchange by supercooling, and to release ice on the release plate.
An object of the present invention is to provide a stable ice heat storage device capable of continuous ice making without growing and hindering ice making.

[0007]

In order to achieve the above object, an ice heat storage device according to claim 1 of the present invention comprises a heat storage tank, a subcooler for bringing water into a supercooled state, and the supercooler. A communication part that connects the heat storage tanks, a circulation line that supplies the water in the heat storage tanks to the subcooler, and a freezing point that is lower than that of water that exchanges heat with the water in the subcoolers and that is mixed and combined with each other. A second liquid which is insoluble and is insoluble, a jetting means for jetting the second liquid in the middle of the communication part, and a pump and a freezing means for circulating the second liquid from the storage part of the second liquid to the subcooler. It is characterized by having.

According to a second aspect of the present invention, in the ice heat storage device according to the first aspect, a plurality of nozzles installed in the communicating portion serve as a means for ejecting the second liquid discharged from the subcooler to the communicating portion. It is characterized in that it is ejected from the periphery of the communication portion toward the center.

According to a third aspect of the present invention, in the ice heat storage device according to the first aspect, as means for ejecting the second liquid discharged from the subcooler to the communicating portion, the second liquid is directed from the inside of the communicating portion toward the wall surface of the communicating portion. It is characterized in that it is ejected.

According to a fourth aspect of the present invention, in the ice heat storage device according to the first aspect, the water discharged from the subcooler from the inside of the communication section is used as a means for ejecting the second liquid discharged from the subcooler to the communication section. It is characterized in that it is ejected in the opposite direction to the flow of.

[0011]

According to the present invention, the supercooled water cooled by the supercooler forms a flow of water passing through the communication section toward the heat storage section, but the second liquid jetted in the middle of the communication section is ejected. The second liquid ejected by the means forms droplets inside the communicating portion and collides with the supercooled water. The supercooled water that has collided with the droplets of the second liquid is released at this point to produce ice pieces, and the produced ice pieces are carried to the heat storage tank by the flow of water. On the other hand, the second liquid ejected to the communication part is recovered from the storage part in the lower part of the heat storage tank together with the flow of water, and is supplied to the subcooler again through the circulation pump and the refrigerator. Water is supplied to the supercooled water from a water intake on the side wall of the heat storage tank through a circulation pump.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention (claims 1 and 2).
FIG. In the figure, 1 is a heat storage tank,
This heat storage tank 1 has a communicating portion 1a and has an inclined bottom portion, an antifreezing liquid (second liquid) storage portion 1b is formed in a lower bottom portion, and a water intake port is provided on a side wall 1c opposite to the communicating portion 1a. 1d is provided. An antifreeze liquid circulation line consisting of an antifreeze liquid circulation pump 2 and a refrigerator 3 is connected to the storage portion 1b, and the outlet side of the refrigerator 3 passes through a subcooler 4 and an antifreeze liquid pipe 5 and an antifreeze liquid outlet 6
Connected to.

Further, a water circulation pump 7 is connected to the water intake 1d, and from the water circulation pump 7, the subcooler 4 and the communicating portion 1 are connected.
a, a circulation line connected to the heat storage tank 1 is formed. FIG. 2 is a cross-sectional view of the communication portion 1 a of FIG. 1, and is a cross-sectional view seen from the antifreeze liquid ejection port 6. The plurality of antifreeze jet nozzles 6a installed around the communicating portion 1a have a structure for ejecting toward the center of the communicating portion 1a. Further, as the antifreeze liquid, a liquid which has a lower freezing point than water for heat exchange and is insoluble without being mixed and combined with each other is used.

Next, the operation of this embodiment will be described. Antifreeze liquid (second liquid) cooled to 0 ° C or less by the refrigerator 3.
8 exchanges heat with the water supplied to the subcooler 4 in the subcooler 4 to generate supercooled water 9. The antifreeze liquid 8 that has undergone heat exchange is then supplied by the antifreeze liquid pipe 5 to the antifreeze liquid jet port 6 installed in the middle of the communication portion 1a. The antifreeze liquid 8 that has reached the antifreeze liquid ejection port 6 is sent to the antifreeze liquid ejection nozzle 6a,
Antifreeze liquid droplets 8 ejected toward the center in the communication portion 1a
a is formed.

On the other hand, the supercooled water 9 is sprayed from the antifreeze liquid ejecting nozzle 6a while the antifreeze liquid droplets 8 are flowing through the communicating portion 1a.
It collides with a and the supercooled state is released. At this time, ice pieces 10 are generated from the supercooled water 9, and the generated ice pieces 10 are connected to the communicating portion 1
It reaches the heat storage tank 1 through a and is accumulated above the heat storage tank 1 by buoyancy.

FIG. 3 is a sectional view of a second embodiment of the present invention (corresponding to claim 1 and claim 3), and FIG. 4 is an antifreeze jet port 6 of FIG.
FIG. 3 is a cross-sectional view seen from a communication portion 1a. This embodiment is different from the first embodiment in that the line connecting the subcooler 4 to the antifreeze pipe 5 and the antifreeze jet 6 has a communicating portion 1a.
Only the points are installed inside, and the other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given to the same components and the duplicate description will be omitted.

In this embodiment, the antifreeze liquid 8 supplied from the antifreeze liquid pipe 5 is ejected from the antifreeze liquid ejecting nozzle 6a toward the wall surface from the center of the communicating portion 1a. That is, the antifreeze liquid 8 discharged from the supercooler 4 reaches the antifreeze liquid jet port 6 through the antifreeze liquid pipe 5 installed inside the communication portion 1a and is jetted from the antifreeze liquid jet nozzle 6a to form an antifreeze liquid droplet 8a.

Further, the supercooled water 9 is sprayed from the antifreeze liquid droplets 8 from the antifreeze liquid jet nozzle 6a while passing through the communicating portion 1a.
It collides with a and the supercooled state is released. At this time, ice pieces 10 are generated by the supercooled water 9, and the generated ice pieces 10 reach the heat storage tank 1 through the communicating portion 1a and are accumulated above the heat storage tank 1 by buoyancy.

FIG. 5 is a sectional view of a third embodiment of the present invention (corresponding to claim 1 and claim 4). The structure of this embodiment different from that of the first embodiment is connected from the subcooler 4. The antifreezing liquid pipe 5 is connected to the inside of the communicating part 1a through the outside of the communicating part 1a, and the antifreezing liquid ejecting nozzle 6a connected to the antifreezing liquid ejecting port 6 ejects the subcooling water 9 in the opposite direction. Since the other points are the same as those of the first embodiment, the same reference numerals are given to the same components and duplicate description will be omitted.

In this embodiment, the antifreeze liquid 8 discharged from the subcooler 4 reaches the antifreeze liquid jet port 6 from the antifreeze liquid pipe 5 installed inside the communication part 1a, and is jetted from the antifreeze liquid jet nozzle 6a to form the antifreeze liquid droplets 8a. Form. Further, the supercooled water 9 collides with the antifreeze liquid droplets 8a ejected from the antifreeze liquid ejecting nozzle 6a while passing through the communication portion 1a, and the supercooled state is released. At this time, ice pieces 10 are generated from the supercooled water 9, and the generated ice pieces 10 reach the heat storage tank 1 through the communication portion 1a and are accumulated above the heat storage tank 1 by buoyancy.

[0021]

As described above, according to the present invention,
Since the second liquid is ejected as the means for releasing the supercooled water and the formed droplets are made to collide with the supercooled water, the ice generated as when the release plate is used is iced and grows. There is no need for continuous ice making. In addition, since the antifreeze liquid cooled to 0 ° C or less is 0 ° C or less even after it leaves the subcooler, when the supercooling is released, heat is further exchanged by direct contact to generate ice. It is possible to provide an ice heat storage device having high ice-making efficiency as compared with ice-making by direct contact with.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of the antifreeze jet port of FIG.

FIG. 3 is a sectional view of a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of the antifreeze jet port of FIG.

FIG. 5 is a sectional view of a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat storage tank, 1a ... Communication part, 1b ... Storage part, 1c ... Side wall, 1d ... Intake port, 2 ... Antifreeze circulation pump, 3 ... Refrigerator, 4 ... Supercooler, 5 ... Antifreeze pipe, 6 ... Antifreeze jet Outlet, 6a ... Antifreeze jet nozzle, 7 ... Water circulation pump, 8 ...
Antifreeze liquid, 8a ... Antifreeze liquid droplets, 9 ... Supercooled water, 10 ... Ice chips.

Claims (4)

[Claims] 1. A heat storage tank, a subcooler for bringing water into a supercooled state, a communication section connecting the supercooler and the heat storage tank, and a circulation for supplying water in the heat storage tank to the subcooler. A line, a second liquid that has a lower freezing point than water that exchanges heat with water in the subcooler, and is insoluble without being mixed and combined with each other, and the second liquid is ejected in the middle of the communicating portion. An ice heat storage device comprising: a jetting means, a pump and a freezing means for circulating the second liquid from a storage portion to the subcooler. 2. The ice heat storage device according to claim 1, wherein the second liquid ejected from the subcooler is ejected to the communicating portion.
An ice heat storage device, characterized in that a plurality of nozzles installed in a communication section ejects the nozzle toward the center from the periphery of the communication section. 3. The ice heat storage device according to claim 1, wherein the second liquid ejected from the subcooler is ejected to the communicating portion.
An ice heat storage device characterized in that it is ejected from the inside of the communication portion toward the wall surface of the communication portion. 4. The ice heat storage device according to claim 1, wherein the second liquid ejected from the subcooler is ejected to the communicating portion.
An ice heat storage device characterized in that the water is ejected from the inside of the communication section in a direction opposite to the flow of water flowing out from the subcooler.