JPH08210742A - Ice making device and ice heat storage device - Google Patents

Abstract

(57) [Abstract] [Purpose] In an ice heat storage system with direct contact with antifreeze liquid, the nozzle part, heat exchange part, space for separating antifreeze liquid and water, the space for separating ice by specific gravity difference, and the part for transferring the two-phase flow of ice and water An ice making device having the same is provided. [Structure] The refrigerator 1 cools the antifreeze liquid 3 extracted by the antifreeze liquid circulation pump 2 to 0 ° C. or less. This antifreeze liquid 3 is ejected from the nozzle portion 4 into the water and drops in the heat exchange portion 5 while forming droplets. Only the antifreeze liquid 3 is collected in the separation / collection portion 6 and is supplied to the refrigerator 1 again by the antifreeze liquid circulation pump 2. It The water directly contacted with the antifreeze liquid 3 cooled in the heat exchange unit 5 produces ice pieces 7, and the two-phase flow of the water and the ice pieces 7 separated from the antifreeze liquid 3 in the separation / recovery unit 6 is transferred to the transfer unit 8.
After passing through the opening portion 9 to the load 11, the secondary pump 10 supplies the load 11 to the load 11, and the reflux water that has been warmed by heat exchange in the load 11 is supplied again to the nozzle unit 4.

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, and more particularly to an ice heat storage device suitable for directly transferring ice and water when a heat storage tank and an ice making portion are separated.

[0002]

2. Description of the Related Art A system having a heat storage device reduces the load of heat source equipment by using inexpensive late-night power for the purpose of reducing the demand for cooling power load concentrated in the daytime, and compares building air conditioning and district heat supply. It can be seen that it is applied to a large capacity air conditioning system.

Among the heat storage systems, the so-called ice heat storage system, in which cold heat is stored in the form of ice in the heat storage tank, uses latent heat of water, so that a large amount of cold heat can be stored even in a small-scale heat storage tank, and therefore, it has attracted attention. And some have been put to practical use.

In this ice heat storage method, a tube type heat exchanger is installed in the heat storage tank according to the difference in the ice making method, and solid ice is attached to the outer surface of the tube by heat exchange with an antifreeze solution of 0 ° C. or less flowing in the tube. There is a means for generating heat to generate sherbet-like ice by direct contact with an antifreeze liquid that is insoluble in water, or a means for generating sherbet-like ice by releasing supercooling by utilizing the supercooling phenomenon of water. .

[0005]

In any of the ice heat storage systems for producing solid ice and sherbet-like ice, the portion where ice is produced is located inside the heat storage tank or in a portion close to the heat storage tank. This limits the freedom of arranging the heat storage tank and the ice-generating part independently of each other structurally.
Further, sherbet-like ice has fluidity in water and can be filled with ice regardless of the shape of the heat storage tank. However, ice and water generated at one location are distributed on the way to the heat storage tank. Then, transferring to a plurality of heat storage tanks causes blockage of ice pieces in the pipe during distribution, and therefore ice and water once suspended in the heat storage tank are transferred from the heat storage tank.

Further, when the cold heat is supplied to the load side, the ice in the heat storage tank is once melted by the reflux water and sent from the heat storage tank in the form of cold water, and the temperature (7 Although it can be supplied at a temperature (about 4 ° C.) lower than about (° C.), the latent heat of melting of ice cannot be conveyed directly to the vicinity of the load side through the pipe. For this reason, the diameter of the pipe for transferring the cold heat is not so different from that of the water heat storage system.

Therefore, an object of the present invention is to allow a heat storage tank and a portion for producing ice to be structurally independent, and to intentionally distribute ice and water before they reach the heat storage tank. It is an object of the present invention to provide an ice making device and an ice heat storage device that can be transferred to a heat storage tank, and can supply cold heat to the load side directly to transfer the latent heat of melting of ice.

[0008]

In order to achieve the above object, the invention according to claim 1 is provided with a heat medium circulation system having at least a refrigerator and a pump through which a heat medium circulates, and heat cooled by the refrigerator. A space for direct contact heat exchange of water with water to produce ice, a space for separating the medium from water and ice due to a difference in specific gravity, and a two-phase flow of water and produced ice to the outside of the separation space An ice making device having a transfer means.

According to the second aspect of the invention, the opening of the transfer means for guiding the two-phase flow of water and ice to the outside of the separation space is at least 1.
It is characterized by having more than one. The invention according to claim 3 is characterized in that at least one or more transfer means can be independently operated.

In the invention according to claim 4, a water circulation system having a circulation pump is provided so as to return from the opening of the transfer means for guiding the two-phase flow of water and ice to the outside of the separation space to the space for heat exchange via the load. It is characterized by that.

According to a fifth aspect of the present invention, the ice making device is installed above a container having a filling space for ice, and the ice and water produced by the ice making device are dropped from the opening to above the container. The ice heat storage device is characterized in that a water circulation system having a circulation pump is provided so as to recover only water from the lower part of the above and return it to the space for heat exchange. The invention according to claim 6 is the ice heat storage device, wherein the ice making device is installed inside a container having a filling space for ice.

[0012]

According to the invention for achieving the above object, the position where water directly contacts with the antifreeze to generate ice is not in the heat storage tank or in the vicinity of the heat storage tank but in another space. Therefore, by connecting the opening of the ice making device and the heat storage tank with a duct or a pipe, the ice storage apparatus can be installed without being restricted by the positional relationship of the heat storage tank.

Further, since the two-phase flow of water and ice is separated from the antifreeze liquid and the means for guiding the two-phase flow to the outside of the separation space is provided, it is possible to transfer the two-phase flow directly to the load through the pipe, and at the same time, transfer it. At this time, it is possible to distribute the two-phase flow in advance, so that it is possible to supply a plurality of loads or heat storage tanks from one ice making device.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, reference numeral 1 is a refrigerator, and the refrigerator 1 cools the water-insoluble antifreeze liquid 3 extracted by the antifreeze liquid circulation pump 2 to 0 ° C. or less. This antifreeze 3 is the nozzle 4
Is sprayed into the water and drops in the heat exchange unit 5 while forming droplets, only the antifreeze liquid 3 is recovered in the separation / recovery unit 6, and the antifreeze liquid circulation pump 2 supplies it again to the refrigerator 1.

On the other hand, the water directly contacted with the antifreeze liquid 3 cooled in the heat exchange section 5 to exchange heat produces ice pieces 7, and the two phases of water and ice pieces 7 separated from the antifreeze solution 3 in the separation / recovery section 6 are produced. The flow flows from the transfer section 8 through the opening section 9 and is loaded by the secondary pump 10.
The reflux water that is supplied to the nozzle 11 and heats up by the heat exchange in the load 11 is supplied to the nozzle portion 4 again.

FIG. 2 is a block diagram showing another embodiment of the present invention. Water and ice are fed from the transfer section 8 to a plurality of secondary pumps 10a, 10b, 10c by a plurality of openings 9a, 9b, 9c. After the two-phase flow is distributed, a circulation line is formed to reach the nozzle portion 4 via the loads 11a, 11b, and 11c, and the configuration is the same as that of the above embodiment.

That is, when the ice pieces 7 generated in the heat exchange section 5 reach the transfer section 8 through the separation / recovery section 6, there are a plurality of openings 9a, 9b, 9c to provide two phases of water and ice. The flow is distributed and each secondary pump 10a, 10
Reach b, 10c. Moreover, the opening / closing operations of the openings 9a, 9b, 9c can be performed independently, and the operation is performed according to the demand of the loads 11a, 11b, 11c.

FIG. 3 is a block diagram showing a further different embodiment of the present invention. In the ice making device shown in FIG. 1, a two-phase flow of water and ice is installed above an independent heat storage tank 12 and an opening 9 is formed. From the water storage tank 12 to the heat storage tank 12, only the water is collected at the water intake 13 at the bottom of the heat storage tank 12 and supplied to the nozzle portion 4 by the water circulation pump 14.

That is, in the two-phase flow of water and ice supplied from the opening 9 to the heat storage tank 12, only water is collected at the intake port 13, so that the ice filling rate in the heat storage tank 12 gradually increases. go. FIG. 4 is a block diagram showing a further different embodiment of the present invention,
Slab tanks 15a, 15 in the basement instead of the independent heat storage tank 12
The configuration is the same as that of the embodiment shown in FIG. 3 except that it is b. That is, the ice making device shown in FIG. 1 is installed above each of the plurality of slab tanks 15a and 15b, and a two-phase flow of ice and water is supplied from an opening penetrating the floor surface 16.

FIG. 5 is a constitutional view showing still another embodiment of the present invention, in which the openings 9a, 9 of the ice making device shown in FIG.
The configuration is the same as that of the embodiment shown in FIG. 4, except that the two-phase flow of ice and water is distributed from the b and 9c to the slab tanks 15a, 15b and 15c.

FIG. 6 is a block diagram showing a further different embodiment of the present invention. The heat storage tank 12 independent of the ice making device shown in FIG.
The structure is the same as that of the embodiment shown in FIG. 3, except that the two-phase flow of ice and water is directly supplied to the heat storage tank 12 from the opening.

FIG. 7 is a block diagram showing a further different embodiment of the present invention. The ice making device shown in FIG.
The structure is the same as that of the embodiment shown in FIG. 4 except that the two-phase flow of ice and water is directly supplied to the underground slab tanks 15a and 15b from the openings installed inside a and 15b.

[0023]

As described above, according to the present invention, by freely installing the ice making device, it is possible to make ice without being restricted by the shape or the positional relationship of the heat storage tank. Installation configuration is possible. At the same time, by modularizing the ice making device, the required design capacity of the ice making device for each demand load becomes an ice making device unit, and selection becomes easy. Furthermore, it becomes possible to install the ice making device in the heat storage tank. Therefore, modifying the conventional water heat storage tank type into the ice heat storage tank using the ice making device is an extremely easy modification by only installing the ice making device. .

Further, since it is possible to transfer the two-phase flow of water and ice to the load through the direct piping, not only the heat supply according to the individual demand of the heat demand side can be achieved but also the transfer of cold heat is possible. The required pipe diameter can be made smaller than that during cold water transfer, and the transfer power is also small, so that an extremely compact and energy-saving ice making device and ice heat storage device can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the present invention.

FIG. 3 is a configuration diagram showing still another embodiment of the present invention.

FIG. 4 is a configuration diagram showing still another embodiment of the present invention.

FIG. 5 is a configuration diagram showing still another embodiment of the present invention.

FIG. 6 is a configuration diagram showing still another embodiment of the present invention.

FIG. 7 is a configuration diagram showing still another embodiment of the present invention.

[Explanation of symbols]

1 ... Refrigerator 2 ... Antifreeze circulation pump 3 ... Antifreeze 4 ...
Nozzle part 5 ... Heat exchange part 6 ... Separation / recovery part 7 ... Ice piece 8 ... Transfer part 9 ... Opening part 10 ... Secondary pump 11 ... Load 12 ... Heat storage tank 13 ... Intake port 14 ... Water circulation pump
15… Slab tank 16… Floor surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Sekiya 2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Toshiba Keihin Office

Claims (6)

[Claims] 1. A heat medium circulation system having at least a refrigerator and a pump through which the heat medium circulates, a heat medium cooled by the refrigerator, means for discharging water, and heat for directly contacting the heat medium with water. A space for exchanging to generate ice, a space for separating the heat medium from water and ice by a specific gravity difference, and a transfer means for guiding a two-phase flow of water and the generated ice to the outside of the separation space. An ice making device having. 2. The ice making device according to claim 1, wherein there is at least one opening of a transfer means for guiding the two-phase flow of water and ice to the outside of the separation space. 3. The ice making device according to claim 2, wherein at least one or more of the transfer means can be independently operated. 4. The ice making apparatus according to claim 1, wherein the two-phase flow of water and ice is circulated from an opening of a transfer means for guiding the two-phase flow to the outside of the separation space to return to the heat exchange space via a load. An ice making device comprising a water circulation system having a pump. 5. The ice making device is installed above a container having a filling space for ice, and the ice and water produced by the ice making device are dropped above the container from the opening and An ice heat storage device comprising a water circulation system having a circulation pump for recovering only water from the lower part of the container and returning to the space for heat exchange. 6. The ice heat storage device, wherein the ice making device is installed inside a container having a filling space for ice.