JPH05340567A - Ice heat accumulating device - Google Patents

Abstract

PURPOSE:To permit the reservation of ice blocks in respective water tanks without incurring any expense by a method wherein the ice blocks are swept away into a neighbored water tank by overflow water together with the water. CONSTITUTION:Water 6c in a water tank 3c, the most distant tank from a water tank 3a wherein ice blocks are being accumulated, is pumped up by a cold water pump 7 while accumulating ice blocks 4a in the water tank 3a to return the water 6c into the water tank 3a through a bypass pipe 12. The level of the water tank 3a is elevated and, then, the water 6a in the water tank 3a overflows into the next water tank 3b through a communicating port 14a together with ice blocks 4a floating in the water tank 3a. The ice blocks 4a in the water tank 3a are sent into the water tank 3c and are reserved in the water tank 3c. When the water tank 3c is filled with the ice blocks 4c, the water 6b in the water tank 3b is sent back whereby respective water tanks 3a-3c are filled with ice blocks 4a-4c accumulated therein. According to this method, the ice blocks 4a-4c can be reserved in respective water tanks 3a-3c without incurring any expense.

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 for leveling a cooling load, and more particularly to an effective ice storage method inside a heat storage water tank.

[0002]

2. Description of the Related Art In order to cope with the maximum value of the cooling load during the daytime in summer and to utilize the surplus power at midnight, the water in the aquarium is cooled by cold power (cold water storage) or frozen (ice storage). ), And there is a technology to cool in the daytime with the cold heat. Especially in an overcrowded urban area, it is difficult to install a water tank of a sufficient size for the cooling load, so there is much hope for ice heat storage with high heat storage density.

This technique is disclosed in, for example, the literature “Energy and Resources” Vol. 11, No. 4, P. 341 to 346, (1990/7) and the like, a typical example thereof will be explained with reference to FIG.
The refrigerator 1 is operated at midnight power to generate a low temperature, and the low temperature causes the ice making machine 2 to freeze the water to accumulate the ice 4 in the water tank 3. The water 6 in the water tank 3 is sent to the ice maker 2 by the circulation pump 5, and the water 6 in the water tank 3 is changed to ice 4. During the daytime, the cold water 6 in the water tank 3 is sent to the cooling load 8 by the cold water pump 7. The high-temperature return water from the cooling load 8 returns to the water tank 3, is cooled by the ice 4, and is circulated to the cooling load 8 again.

There are many ways to freeze water,
As shown in FIG. 4, in addition to ice making outside the water tank 3, the water tank 3
There is also one that directly makes ice inside the water tank 3 by means such as injecting a low-temperature refrigerant into.

[0005]

When there is only one ice heat storage water tank, there is no particular problem, but it may be composed of a plurality of water tanks. In that case, the following points are problematic. Become.

To explain with reference to FIG. 5, the water tank 3 is used not only as ice heat storage for cooling but also as hot water heat storage for heating. Therefore, the inside is divided into three parts, and each water tank stores ice at one time and hot water at one time according to the amount of cooling load and heating load. There are hot water pumps and hot water piping equipment to supply hot water to the heating load.
Illustration is omitted.

In such a water tank, when it is attempted to store ice in a plurality of water tanks, a device for transporting and distributing the ice produced by the ice making machine 2 to each of the water tanks is provided, or each water tank 3a ... It is necessary to provide means for installing the ice making machines 2a to 2c (in some cases, the refrigerator 1 individually) for each 3c, and also the piping for that. Any such means would lead to a significant increase in equipment costs and repair costs, which is not preferable. An object of the present invention is to provide an ice heat storage device capable of storing ice 4 in each of the water tanks 3a to 3c without such an increase in cost.

[0008]

According to the present invention, the water 6 in each water tank is moved from one side to the other by a circulation pump so that the overflow water causes the ice to be flushed with the water to the adjacent water tank. To achieve the above objectives.

[0009]

The ice need only be stored in the water tank closest to the refrigerator, and does not require a large-scale device, so that it is possible to prevent an increase in equipment costs and repair costs.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIG. Devices that are not directly related to the basic principle of the present invention are omitted as in FIG.

In this embodiment, a low temperature is generated in the refrigerator 1,
The water 6a in the water tank 3a is sent to the ice maker 2, and the ice 4 is manufactured by utilizing the low temperature. The ice 4 drops into the water tank 3a, and the water tank 3a
The shape of the ice 4 floating on the water 6a in the inside is preferably a rough shaved ice shape or a small piece so as to be suitable for heat exchange with water.

While the ice 4 is thus accumulated in the water tank 3a, the cold water pump 7 is used to pump out the water 6c from the water tank 3c farthest from the accumulating water tank 3a. The operation is performed by closing the cold water outlet valves 9a and 9b and opening 9c. The pumped-out water 6 is not sent to the cooling load 8, but is returned only to the water tank 3a in which the ice 4 is accumulated through the bypass pipe 12 by the operation of the cold water switching valve 10 and the cooling water return valves 11a to 11c.

By such an operation, the water level in the water tank 3c is lowered and the water level in the water tank 3a is raised, so that the water tank 3a is eventually released.
Water will overflow. In the present invention, each water tank 3a-
Communication parts 14ab, 14bc are provided on the upper portions of the partition walls 13ab, 13bc of 3c.
Is provided, the overflow water in the water tank 3a will flow into the water tank 3b through the communication portion 14ab. At that time, the ice cube-shaped ice 4a floating in the water tank 3a rides on the overflow water and flows into the water tank 3b.

The water level in the water tank 3b also rises, and similarly, the water 6b in the water tank 3b overflows into the water tank 3c together with the ice 4b. As a result, the ice 4a brought into the water tank 3a rides on the water flow. It is sent to the water tank 3c and stored there.

When the inside of the water tank 3c is filled with ice 4c, the cold water outlet valves 9a to 9c and the cold water return valves 11a to 11c are switched, and the water 6b in the water tank 3b is sent to the water tank 3a. Store ice 4b. When the inside of the water tank 3b is filled with the ice 4b, the valves are switched again, the cold water pump 7 is stopped, and the ice 4a is accumulated in the water tank 3a.

By this operation, it is not necessary to increase the number of the ice making machines 2 according to the number of the water tanks 3 regardless of the number of the water tanks 3, and a device for transporting and distributing the ice 4 to each water tank 3. unnecessary.

In the above description, the method for producing the ice 4a outside the water tank 3a has been taken as an example.
The present invention is similarly applicable to the method of producing a.

By the way, in the communicating portion 14 of each water tank 3, water may simply overflow, but since the ice 4 does not stay on the edge of the communicating portion 14 and passes through the communicating portion 14 effectively. It is possible to install a special device in the communication part 14. FIG. 2 shows an example of a proposal regarding the structure of the communication portion 14.

In FIG. 2, a flow straightening plate 15 is provided at the entrance of the communicating portion 14 so that the ice 4 can easily flow into the communicating portion 14. Although this may be sufficient for the time being, the ice 4 becomes lumpy. In this case, a rotary blade 16 is provided in order to crush it so that it can easily pass through the communication section 14. The rotary blade 16 may be rotated by the water flow of the communicating portion 14 due to the water level difference Δh before and after the communicating portion 14, but may be forcibly driven by a motor (not shown). The position of the rotary blade 16 does not have to be at the position of the partition wall 13, and may be upstream of the communicating portion 14, that is, near the opening (inlet 6 for water 6) of the straightening vane 15.
FIG. 3 shows an example of another proposal regarding the structure of the communication portion 14.

In FIG. 3, an opening / closing plate 17 is attached to the communication parts 14ab and 14bc.
ab and 17bc are provided, and the opening / closing plates 17ab and 17 are initially provided.
bc is fully closed like the opening / closing plate 17ab, and the communication part 14
Opening / closing plate 17 when the water level difference between ab and 14bc becomes large
Fully open like bc, the water 6 is suddenly discharged, and the water 6 is put on the flow to promote the passage of the ice 4 floating in the water 6 through the communication portion 14.

The operation of the opening / closing plate 17 does not necessarily have to rotate about one side as an axis as shown in FIG. 3, but may move upward or in another direction in parallel with the partition wall 13, depending on the shape and structure of the communicating portion 14. , A suitable method is considered.

[0022]

As described above, according to the present invention,
In an ice heat storage device consisting of multiple heat storage water tanks, pumps and pipes for transferring water from each water tank to a heat load, and an ice making device, it is possible to store ice in a water tank separated from the ice making device without requiring a large-scale device. It will be possible.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an example of an ice heat storage device using the present invention,

FIG. 2 is a conceptual diagram showing an example of a structure of a communication part between water tanks of the ice heat storage device shown in FIG.

FIG. 3 is a conceptual diagram showing an example of another structure of a communication part between water tanks of the ice heat storage device shown in FIG.

FIG. 4 is a typical conceptual diagram of an ice heat storage device,

FIG. 5 is a conceptual diagram of an ice heat storage device based on a conventional technique.

[Explanation of symbols]

 1 ... Refrigerator 2 ... Ice maker 2, 3a, 3b, 3c ... Water tank 4, 4a, 4b, 4c ... Ice 5 ... Circulation pump 6, 6a, 6b, 6c ... Water 7 ... Cold water pump 8 ... Cooling load 9a, 9b , 9c ... Chilled water outlet valve 10 ... Chilled water switching valve 11a, 11b, 11c ... Chilled water bottling valve 12 ... Bypass pipe 13, 13ab, 13bc ... Partition wall 14, 14ab, 14bc ... Communication part 15 ... Rectifier plate 16 ... Rotating blade 17ab, 17bc ... Open / close plate

Claims (2)

[Claims] 1. An ice heat storage device comprising a plurality of heat storage water tanks, a pump and piping for transferring water in each water tank to a heat load, and an ice making device, wherein water in a water tank separated from the ice making device is directly connected to the ice making device by the pump. An ice heat storage device characterized in that the ice generated in a water tank directly connected to the ice making device is transferred to another water tank together with overflow water of the water tank by sending the ice to the other water tank. 2. The ice heat storage device according to claim 1, wherein the communication portion of each water tank has a structure for promoting passage of ice.