JPH1123008A - Cooling device accompanied by ice water transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device accompanied by ice water transportation, which is capable of being applied to a large-capacity ice water tank, and capable of taking out the ice water having the optimum rate of ice efficiently. SOLUTION: A cooling device is provided with an ice water supplying device having an ice water manufacturing device and an ice water tank for reserving ice water, a cold/heat supplying pipeline as well as a cold/heat returning pipeline which are connected to the ice water supplying device, and a cooling and heating load connected to respective pipelines and cooled directly or indirectly by the ice water. In such a cooling device, the ice water tank is constituted so as to be provided with an ice pushing device 4 moving ice pieces 3 floating on the upper part of the water level into an ice take-out direction 7 at a position including the level of liquid, while the ice moved by the ice pushing device is supplied into the cold/heat supplying pipeline 1 directly or through a mixing tank. In this case, the ice water tank is constituted of an ice water reserving tank 2 and an ice water supplying tank 7 connected to the cold/heat supplying pipeline 1, while the ice water reserving tank 2 is preferable to have a variable rotating speed impeller 8 or a screw conveyor for transferring the ice in the same tank into the ice water supplying tank 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system with cold heat transfer, and particularly to a refrigeration system having a long piping distance such as a district cooling system.
The present invention relates to a cooling device for performing cold heat transport.

[0002]

2. Description of the Related Art Recently, large-scale district cooling facilities have been constructed, and district cooling facilities having a large piping cost ratio to the total construction cost have increased. That is, when the scale becomes large, the area covered by the district cooling increases, the load increases, and both the pipe diameter and the pipe distance increase. Therefore, the district cooling system using ice water has come into the spotlight in order to reduce the cost of piping equipment. However, there are still many technical problems in putting this ice water district cooling system into practical use, and it has not yet been fully implemented. In particular, a technique for extracting ice water with a predetermined ice fraction from an ice water tank has not been established.

[0003] That is, in the conventional small-capacity ice water take-out apparatus, it is recommended to stir the entire ice water tank to keep the ice fraction in the tank constant, and to suction this by a pump to send it to the load side. This method requires a large amount of energy for stirring, so that it is difficult to apply the method to a large-scale heat storage tank. It has been proposed to provide a separate tank for stirring, but a good concrete method for transferring ice water from a large-scale heat storage tank to the stirring tank has not been developed. Also, a method has been proposed in which an ice water separator is provided, ice water overflows from the upper part of the ice water tank to the ice water separator, and a screw conveyor in the ice water separator increases the amount of ice and sends it out to the load side.
According to this method, there is a problem that the flow rate of water extracted from the separation device becomes enormous, and the pump power for returning to the ice water tank becomes large.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention provides a cooling apparatus which can be applied to a large-capacity ice water tank and which can efficiently take out ice water having an appropriate ice fraction with ice water transportation. The task is to

[0005]

According to the present invention, there is provided an ice water supply device having an ice water production device and an ice water tank for storing ice water, a cold heat supply pipe connected to the ice water supply device, and In a cooling device having a cold return pipe and a cold load directly or indirectly cooled by ice water connected to each of the pipes, the ice water tank may move the ice pieces floating above the water surface to a position including the liquid level. And an ice pushing device for horizontally moving in the ice water taking-out direction so that the ice moved by the ice pushing device is supplied to the cold heat supply pipe directly or via a mixing tank.

According to the present invention, in the cooling device, the ice water tank is composed of an ice water storage tank for storing ice water and an ice water supply tank connected to a cold heat supply pipe. Has a variable impeller or screw conveyor for transferring ice, and is configured to transfer ice to an ice water supply tank, and the ice water supply device or the cold heat supply pipe has an ice fraction. It is preferable that an ice fraction detecting device to be detected is provided, and a control device that can change the rotation speed of the impeller or the screw conveyor based on a signal from the ice fraction detecting device is provided.

[0007]

Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of an ice water tank of an ice water supply device used for the cooling / heating device of the present invention, and FIG. 2 is a front view of the ice water tank. In the figure, 1 is a cold heat supply pipe,
With this supply pipe, ice water is supplied to the load side and used for a cooling load (not shown). The ice water tank is an ice water storage tank 2
And an ice water supply tank 7. The ice water storage tank 2
Ice from an ice making device (not shown) and return water from the load. The ice pieces 3 in the ice water storage tank 2 float above the tank, but are moved on the water surface of the tank by the ice moving device 4. In the figure, the projection 6 is mounted on the V-belt 5 to move from left to right.

Reference numeral 7 denotes an ice water supply tank. Although the size of the tank is shown large in the drawing for the sake of explanation, it is actually much smaller than the ice water storage tank 2. The aforementioned ice moving device 4
The ice pieces moved to the ice water supply tank 7 side by
The water flows into the ice water supply tank 7 via an impeller 8. In addition,
Depending on the position of the pulley of the V-belt 5 and the position of the ice water supply tank 7, the impeller 8 may be omitted in some cases. In the figure, an impeller is used, but a screw conveyor may be used instead of the impeller. That is, a rotating device that can move the ice pieces by the rotating force is used. In addition, this impeller 8
Sends the ice chips and a little water to the ice water supply tank 7. When the amount of ice is to be increased, the rotational speed of the impeller 8 is increased, and when it is desired to decrease, the rotational speed is controlled to be decreased.

A pipe 9 is provided between the ice water supply tank 7 and the ice water storage tank 2. When it is desired to reduce the ice fraction in the ice water supply tank 7, the control valve 10 inserted in the pipe is opened. Thus, when it is desired to increase the ice fraction, it is controlled to close. However, for this control valve control, simple control such as changing the opening degree depending on the time zone is adopted. That is, the opening degree is controlled to be small at night when the load is small, and to be large during the daytime. The direct control of the ice fraction is controlled by the rotation speed of the impeller. Normally, the rotation speed is low, but when the ice in the ice water storage tank 2 becomes low,
Since the amount of ice carried out by the impeller is reduced, the number of rotations is increased by a signal of an ice fraction detector (not shown) so that the ice is controlled so as to be able to carry out the same amount of ice as usual. In general, the ice water supply tank 7 is often a stirring tank, but since the volume of the stirring tank is small, the power for stirring is small unlike the conventional system. In this ice water supply tank 7, ice water having a predetermined ice fraction is supplied to a load by a pump 11.

[0010]

According to the present invention, the following excellent effects can be obtained. (1) Since the ice floating by the buoyancy is moved by the ice moving means on the ice water tank water surface, the ice can be effectively moved to the ice water supply device side with very little power. (2) When the ice water tank is an ice water storage tank and an ice water supply tank, the ice can be effectively supplied to the ice water supply tank even when the ice water in the ice water storage tank is low, and the control of the ice fraction is easy. Becomes

[Brief description of the drawings]

FIG. 1 is a plan view of an ice water tank of an ice water supply device used in a cooling device of the present invention.

FIG. 2 is a front view of FIG. 1;

[Explanation of symbols]

1: cold water supply pipe, 2: ice water storage tank, 3: ice piece, 4: ice moving device, 5: V belt, 6: protrusion, 7: ice water supply tank,
8: impeller, 9: piping, 10: control valve, 11: pump

Claims (3)

[Claims] 1. An ice water supply device having an ice water production device and an ice water tank for storing ice water, a cold heat supply pipe and a cold heat return pipe connected to the ice water supply device, and an ice water connected to each of the pipes. The ice water tank has an ice pushing device for horizontally moving the ice pieces floating above the water surface in a direction including the liquid surface in the ice water removal direction. A cooling device characterized in that ice moved by an ice pushing device is supplied to the cold heat supply pipe directly or via a mixing tank. 2. An ice water supply device having an ice water production device and an ice water tank for storing the ice water, a cold heat supply pipe and a cold heat return pipe connected to the ice water supply apparatus, and an ice water connected to each of the pipes. And a cooling load having a cooling load that is cooled down, the ice water tank is composed of an ice water storage tank that stores ice water and an ice water supply tank that is connected to a cold heat supply pipe. Having a variable speed impeller or screw conveyor for transferring ice,
A cooling device configured to transfer ice to an ice water supply tank. 3. The ice water supply device or the cold heat supply pipe is provided with an ice fraction detection device for detecting an ice fraction, and the rotation speed of the impeller or the screw conveyor is determined by a signal from the ice fraction detection device. 3. The cooling device according to claim 2, further comprising a control device that can be changed.