JP2580415Y2 - Ice storage tank thawing equipment - 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 tank for storing heat source water for air conditioning in the form of coexistence of ice.

[0002]

2. Description of the Related Art Conventionally, when cooling and heating by circulating cold and hot water through a water-side heat exchanger of a fan coil unit or a water heat source heat pump unit disposed in a building, the cooling heat during cooling is stored in a heat storage tank. There has been proposed a heat storage system using a so-called ice heat storage method for storing in the form of ice. According to such a system, for example, ice is driven by driving a refrigerator with nighttime electric power, a large amount of cold heat is stored in a heat storage tank in the state of ice, and during cooling operation, the cold heat of the ice is taken out as cold water and the secondary heat is removed. Since it circulates through an exchanger (load-side heat exchanger) and utilizes latent heat at the time of solid-liquid transformation of water, even a small-scale device can store a large amount of cold heat, and has been particularly attracting attention in recent years.

[0003] More recently, a large-scale heat storage system using a so-called multi-tank type heat storage tank as a cold / hot water tank, which is composed of a large number of tanks utilizing underground slabs and the like, and the tanks are successively communicated with each other by a communication pipe to flow water. Equipment has also been proposed.

[0004] When the cold energy stored in the above-mentioned ice thermal storage system is used by using inexpensive nighttime electric power, the following problems have occurred. In other words, when the return water from the load side is simply returned to the heat storage tank, the rate of water flow into the heat storage tank is generally low, so that the melting of the ice in the tank becomes uneven, so that the latent heat of the ice In some cases, the temperature of the supply water to the load increased before the water could be fully utilized.

[0005] In order to improve this, for example, a "heat storage facility for air conditioning" disclosed in Japanese Utility Model Laid-Open No. 4-8025 disclosed by the present applicant.
It is conceivable to apply the technique of spraying the circulating water from the load side directly to the ice in the ice heat storage tank from the upper part of the tank. Indeed, by spraying circulating water directly on ice as in the above-described device, it is possible to improve the uniformity of melting of ice and lower the temperature of water supplied to the load side as compared with the conventional case. However, for example, when the water level of the ice-water phase stored in the heat storage tank rises and the volume of the ice portion appearing on the water surface decreases, the effect of direct water spraying decreases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional heat storage tank, and has been made to solve the problem of the non-uniform melting of ice and the ice in the heat storage tank. Can be quickly melted, and
An object of the present invention is to provide a new and improved ice melting device for an ice heat storage tank that can easily apply such effects to existing heat storage equipment without requiring new piping work.

[0007]

According to the present invention, in order to solve the above problems, an ice heat storage tank for storing ice / water slurry as a heat source water for air conditioning, and an ice heat storage tank installed outside the ice heat storage tank are provided. A subcooler capable of cooling the water that has been passed and passed to the subcooling zone; and continuously flowing water in the ice storage tank into the subcooler and discharging the water from the discharge end of the subcooler. A system for discharging the cooling water, a means for converting the supercooled water into an ice / water slurry and guiding it into the ice heat storage tank, and a method for dissolving the ice / water slurry stored in the ice heat storage tank A system for guiding return water from the load side to ice into the ice storage tank, and converting supercooled water to ice / water slurry in the ice storage tank.
Said means for directing into the ice heat storage tank
With an opening at the top to accept the supercooled water discharge
From the lower end of the pipe to the bottom of the heat storage tank
It consists of a communicating pipe and is stored in the ice heat storage tank.
Perforated plate in the ice storage tank above the ice / water slurry
Together with passing tension in the horizontal direction, the return water from the load side, characterized in that the watering can be configured from the porous plate above, de-ice device for ice thermal storage tank is provided.

[0008] According to another aspect of the present invention, the hole diameter of the perforated plate installed in the ice heat storage tank as described above is set to:
As the perforated plate on the accumulated return water is a predetermined water level, preferably rather is preferably <br/> be open degree as held at about 100 mm, also, below this porous plate, ice-water Slurry
-An ice filter is provided to separate the ice from the phases
Is preferred .

[0009]

According to the present invention, the return water on the load side is sprinkled from the top of the perforated plate, and the water is uniformly sprayed on the ice stored in the ice heat storage tank through the holes of the perforated plate. Fast and uniform melting can be achieved. Further, according to another aspect of the present invention, since the return water of about 100 mm is always stored on the perforated plate, the water is continuously and continuously sprayed on the ice and is stored on the perforated plate. The water level of the ice water phase in the heat storage tank can be lowered by the water level, and the volume of the ice portion appearing on the water surface can be increased by that amount, so that the melting speed of ice is promoted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view of a first embodiment of an ice storage tank de-icing apparatus according to the present invention, and a water spray for spraying return water from a load 2 is provided in an upper part of the ice storage tank 1. A means 3 is provided, below which a perforated plate 4 is stretched horizontally in accordance with the present invention.
Further, below the perforated plate, an ice filter 5 for separating ice nuclei from the ice water phase is provided.

At the time of ice storage, the heat source water in the ice heat storage tank 1 is
Water is taken as an aqueous phase from which ice nuclei have been separated by the ice filter 5. By driving the pump 6 , it is continuously supplied to the subcooler 8 via the transfer pipe 7. The heat source water passed through the supercooler 8 is cooled to a supercooling region of 0 ° C. or less, discharged into the atmosphere as supercooled water, and then dropped into the vertical pipe 9.

The vertical pipe 9 is a vertical pipe having an inner diameter sufficient to receive the discharge flow of the supercooled water from the supercooler 8, and has an upper end formed with a divergent receiving portion and opened. The lower end thereof communicates with the transfer pipe 10. The transfer pipe 10 communicates with the bottom of the heat storage tank 1 through a valve means, and the supercooled water discharged from the subcooler 8 is dropped by the impact when the supercooled water falls into the vertical pipe 9. The slurry is introduced into the bottom of the heat storage tank 1 via the transfer pipe 10 while maintaining the fluid state. The ice / water slurry introduced into the heat storage tank 1 rises in the heat storage tank according to its specific gravity, and is stored below the ice filter 5 as a cold heat source of a sherbet strip having a large ice volume.

On the other hand, the cold heat source stored in the heat storage tank 1 as described above is supplied to the pump 12 during operation such as air conditioning in the daytime.
Is driven, the water is taken through the transfer pipe 11,
It is sent to the load side heat exchanger 2 such as a heat pump. The circulating water whose temperature has been exchanged and heated by the load 2 is sent to the heat storage tank 1 by the transfer pipe 13, and the water sprinkler 3
The water is sprayed onto the perforated plate 4 through the through holes, and further sprinkled on sherbet-shaped ice stored below through the holes of the perforated plate, thereby melting the ice.

According to the present invention, the hole diameter of the perforated plate 4 is set such that the circulating water sprinkled from the sprinkler is flowing downward through the holes of the perforated plate 4 and the predetermined water level 15 is set on the perforated plate 4. The degree of opening is such that it is accumulated while holding. Therefore, only the amount of water stored on the perforated plate 4 corresponds to the heat storage tank 1.
It is possible to lower the water level of the ice-water phase portion in the inside, so that the volume of the ice portion appearing on the water surface can be increased, and the melting of ice can be promoted. In addition, since a gap is formed between the perforated plate 4 and the ice filter 5, uniform water spray and promotion of melting of ice can be achieved. In this way,
The thawed cold heat source water is again sent to the load side taken from the transfer pipe 11 and used for operating air conditioning and the like.

FIG. 2 shows still another embodiment of the present invention. Figure 1 shows the basic configuration of this ice heat storage system.
And therefore perform the same function as the components shown in FIG. 1 are given the same reference numerals.

In the embodiment shown in FIG. 2, instead of the water spray device 3, a distribution pipe 2 communicating vertically from the lower part of the heat storage tank 1 is provided.
0 is provided, and the pipe 20 has an opening 21 above the perforated plate 4. According to such a configuration, even if a special device such as the watering device 3 is not installed, the opening 21 is simply provided.
By jetting out the circulating water from the load side, the same effect as the device shown in FIG. 1 can be obtained.

That is, the circulating water spouted from the opening 21 forms a certain pool on the perforated plate 4, and then passes through the holes of the perforated plate 4 and accumulates under the ice filter 5 under the ice filter 5.
Pour over water slurry. At this time, water can be evenly sprayed on the ice through the holes of the perforated plate, and the volume of the ice portion exposed on the water surface by lowering the water level of the ice water phase by the amount of the pool formed on the perforated plate Therefore, the melting of ice can be promoted.

In the above embodiment, the present invention is applied to a single-tank type heat storage tank, but the present invention is also applicable to a multi-tank type heat storage tank composed of a plurality of small water tanks. Needless to say, there is.

[0019]

As described above, according to the present invention, return water on the load side is sprinkled from the top of the perforated plate, and the water is uniformly sprayed on the ice stored in the ice heat storage tank through the holes of the perforated plate. As a result, rapid and uniform melting of the ice can be achieved.

According to another aspect of the present invention, since the return water of a predetermined water level, preferably about 100 mm, is always stored on the perforated plate, water is continuously sprayed on the ice without interruption. At the same time, it is possible to lower the water level of the ice-water phase in the heat storage tank by the water level accumulated on the perforated plate, and it is possible to increase the volume of the ice portion appearing on the water surface by that much. The melting rate of is accelerated.

Further, the effect of the present invention can be achieved only by disposing the perforated plate as described above in the existing ice heat storage tank, so that it is possible to reduce labor and cost for piping work and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the configuration of a first embodiment of an ice heat storage tank to which the present invention is applied.

FIG. 2 is a schematic diagram showing the configuration of a second embodiment of the ice heat storage tank to which the present invention is applied.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ice heat storage tank 2 load 3 water sprinkler 4 perforated plate 5 ice filter 6 pump 7 transport pipe 8 supercooler 9 vertical pipe 10 transport pipe 11 transport pipe 12 pump 13 transport pipe

Claims (2)

(57) [Scope of request for utility model registration] 1. An ice heat storage tank for storing ice / water slurry as a heat source water for air conditioning, and a supercooling device that is installed outside the ice heat storage tank and is capable of cooling water passing therethrough to a supercooling area. A system for continuously passing water in the ice heat storage tank into the subcooler and discharging supercooled water from a discharge end of the subcooler; Means for converting the slurry into ice and introducing it into the ice heat storage tank; and means for introducing return water from the load side into the ice heat storage tank to deice the ice / water slurry stored in the ice heat storage tank. And supercooled water are converted to ice / water slurry and guided into the ice storage tank
Means for controlling the discharge flow of the supercooled water from the subcooler.
A vertical pipe with an opening at the upper end for receiving
From the lower end of the pump to the transfer pipe communicating with the bottom of the heat storage tank.
It becomes, above the ice-water slurry to be stored in the ice cold storage tank
The position of the ice cold storage tank with a porous plate pass tension in the horizontal direction, the return water from the load side, characterized in that the watering can be configured from the porous plate above, de-ice device for ice thermal storage tank. 2. An ice / water slurry under the perforated plate.
An ice filter for separating ice from the phase is provided.
Item 3. An ice melting device for an ice thermal storage tank according to Item 1 .