JPH01266455A - Cooling device using ice water - Google Patents

Abstract

PURPOSE:To avoid the clogging of a cooling load with ice chips and combine the large cooling capacity of ice and the low operating cost of water circulation by allowing only cold water to be supplied to the cooling load after separating ice chips from liquid ice by an ice/water separating means disposed in the main pipe. CONSTITUTION:Ice chips or ice particles are separated from water containing ice chips or liquid ice by an ice/water separator 6 for a first cooling load 3a, and only cold water passes through a filter to enter into a supply pipe 7 to pass through a coil in the first cooling load 3a by the action of a water pump 9. Its coldness is retrieved while passing through the coil, and the warmed water returns to the main pipe 5 to join the ice chips containing water therein. In order for ice chips or ice particles to remain up to a diverting point in the supply pipe for the final third cooling load 3c, the temperature of cold water in the main pipe 5 is detected by means of a temperature sensing regulator 9 disposed near to the diverting point to the third cooling load 3c, and the detected signal is supplied to the ice water pump line 4 to control the delivery rate of ice water so as to always maintain said temperature at 0 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling system, and more particularly to a cooling system using ice water that skillfully combines large cooling capacity with ice and low operating costs through water circulation. It is.

(Prior art) In a cooling system that cools and dehumidifies houses, buildings, etc.,
Conventionally, the mainstream method has been to accumulate cold energy using cold water or ice, extract this cold energy as cold water 11, and circulate the cold water to a cooling load such as an air conditioner or a heat exchanger.

However, in this system, as shown in FIG.
Cold water at 4° to 5°C ends up heating up to about 76°C.

This cold water is used for cooling at a cooling load of 3 and reaches a temperature of 12°C.
The temperature is raised to a certain level and the ice is circulated to the ice heat storage tank 1. Therefore, the temperature difference in cooling heat utilization at cooling load 3 is about 5°C at most,
Cooling capacity is extremely low.

In order to increase the cooling capacity of cooling load 3 using this method,
Not only inside the cooling load 3, but also from the ice heat storage tank 1 to the cooling load 3. It is necessary to make the piping from the cooling load 3 to the ice heat storage tank 1 large in diameter, and to increase the capacity and power of the pump 2 to circulate a large volume of cold water.

Therefore, recently, instead of the above method, liquid ice (
A method that accumulates cold energy using a sherbet-like mixture of ice particles and water and circulates this liquid ice directly to the cooling load is attracting attention.

In this method, since the ice particles in the liquid ice have latent heat, the cooling capacity is higher than the above-mentioned method of circulating cold water, and the cooling capacity is higher than that of the above-mentioned method of circulating cold water.
Not only can the piping from the cooling load to the ice storage tank be made smaller in diameter, but the pumps installed in these piping can also be of smaller capacity.

It can be of small power.

(Problem to be Solved by the Invention) However, in the above method of circulating liquid ice directly to the cooling load, since liquid ice containing ice particles and having an extremely low temperature of 0°C or less flows inside the piping, It is necessary to use piping made of material that can withstand the impact of ice particles and extremely low temperatures.

However, piping made of such materials is expensive, and if all the piping built into the cooling load (that is, the coils, which are very long if made in a straight line) are made of this high-cost piping material, equipment costs can be reduced. I can't.

On the other hand, even if it were possible to provide low-cost pipe materials through improvements in pipe manufacturing technology, in a method that circulates liquid ice directly to the cooling load, ice grains could clog the inside of the pipes or the joints of the pipes, reducing the cooling capacity. This may cause an accident that may cause the equipment to drop or even stop the equipment.

In addition, the method of circulating liquid ice directly to the cooling load has problems such as being uneconomical and not being able to respond quickly when the cooling load has large fluctuations.

In other words, when the cooling load is small, the ice grains in the liquid ice circulate between the ice heat storage tank and the cooling load without melting, which reduces the pump's efficiency compared to a method that circulates cold water to the cooling load. Power costs will increase.

On the other hand, when the cooling load is heavy, the liquid ice in the ice storage tank rapidly melts and disappears, making it impossible to provide cooling for the required time. If the capacity of the ice heat storage tank is increased in anticipation of this large load, equipment costs cannot be reduced. It is also possible to generate liquid ice during cooling loads, but not only will the advantage of using inexpensive nighttime electricity be lost to generate liquid ice, but the water in the ice storage tank will be transferred to the ice making device. Liquid ice must be sent to each cooling load in the required amount, making the control system extremely complicated.

The present invention was made in view of the above-mentioned problems, and its purpose is to propose an ice water cooling system that skillfully combines the large cooling capacity of ice with low operating costs due to water circulation. It is in.

(Means for Solving the Problems) In order to achieve the above object, the ice water cooling device according to the present invention connects the inflow and outlet ends of the main pipe to the ice heat storage tank or the ice maker, and It is characterized by circulating ice and water in the ice heat storage tank or ice making machine, and connecting the cooling load to a predetermined position of the main piping via an ice water separation means that allows only water to pass through. It is something to do.

(Function) In the present invention, water or liquid ice containing broken ice (hereinafter referred to as ice pieces) is flowed from the ice heat storage tank or the ice maker to the main pipe.

Water containing ice chips or liquid ice flowing through the main pipe is separated by ice water separation means installed at a predetermined position in the main pipe, and only the cold water is sent to the air conditioner or heat exchanger. It is sent to the cooling load such as the air conditioner, is used for cooling energy, increases in temperature, and then returns to the above-mentioned main piping.

The heated water thus sent to the cooling load and subjected to cold energy utilization gradually melts ice chips or ice grains in the main pipe, and eventually only heated water remains in the main pipe. and,
It is returned to the heat storage tank or ice making machine and is reused for making ice when the cooling load is stopped, such as at night, or during cooling load operation, such as during the day.

In this way, only cold water is supplied to the cooling load, so
No clogging of ice particles occurs within the cooling load. Furthermore, the temperature in the main piping (up to the vicinity of the cooling load) is maintained at approximately 0°C because the cold water contains ice chips and the like.

(Embodiment) FIG. 1 shows a preferred embodiment of the ice water cooling system according to the present invention. In this example, three cooling loads 3a to 3C are arranged for one ice heat storage tank 1. are doing.

Specifically, an ice water pump 4 capable of pumping out both ice and water is provided in the ice heat storage tank 1, and the inflow side end of the main pipe 5 is connected to the ice water pump 4.

On the other hand, the outflow side end of the main pipe 5 is located above the ice heat storage WJ1, so that the ice and water that have been circulated within the main pipe 5 are returned to the ice heat storage tank 1 again.

Further, an ice water separator 6 serving as ice water separation means is disposed at a predetermined position of the main pipe 5. A first cooling load 3 a is connected to the tip of the ice water separator 6 via an outgoing pipe 7 . Further, between the first cooling load 3a and the main pipe 5, a return pipe 8 is installed in parallel with the above-mentioned outgoing pipe 7. And the ice water separator 6 mentioned above. Outbound 7. The first cooling load 3a and the return pipe 8 form a path for branching and circulating the cold water in the main pipe 5. In order to force the circulation, a water pump 9 is disposed at an intermediate position of the return pipe 8.

Similarly, the second. The third cooling loads 3b and 3c are also connected to the ice-water separator 6. Outbound 7. Reinstatement 8. Each of them is connected to the main pipe 5 by a water pump 9.

To further explain each part in detail, an opening 5a is bored at a predetermined position on the side wall of the main pipe 5, and a connecting pipe 5b (with a diameter larger than the above-mentioned outgoing pipe 7) continues to the opening 5a and protrudes outward. (large diameter) are formed to protrude in one direction.

The ice-water separator 6 also includes a reso-use tube 6a whose diameter is gradually reduced toward the tip, and a reso-use tube 6a.
Filter section +4' 6 b arranged at the inflow side opening of
It is composed of. And this filter member 6b
For example, wire mesh, punched metal, or the like is used. The size of the openings provided in the filter member 6b is appropriately selected so that ice pieces flowing inside the main pipe 5 and ice particles in the liquid ice do not pass through. Furthermore, the diameter of both openings of the ice water separator 6 is formed between the connecting pipe 5b and the outgoing pipe 7, and
Connection with other parts is done through flanges formed at both ends.

Further, in this embodiment, a temperature detector 9 is provided in the main pipe 5 near the branch point from the main pipe 5 to the final third cooling load 3C, and this temperature detection regulator 9 and the ice water pump 4 described above are provided.
The supply amount can be controlled according to the measured temperature.

The operation of this embodiment configured as described above will be explained below.

First, the ice water pump 4 is activated, and the ice heat storage tank 1 is connected to the main pipe 5.
Pour water or liquid ice containing ice chips into the container.

The ice chips or ice particles are separated from this water containing ice chips or liquid ice by an ice water separator 6 associated with the first cooling load 3a, and only the cold water passes through the filter member 6b and enters the outgoing pipe 7, where it enters the water pump 9. It passes through the coil in the first cooling load 3a. While passing through this coil, cold water is extracted and heated, and the cold water returns to the main pipe 5 via the return pipe 8 and returns to the main pipe 5.
of water or liquid ice containing ice chips.

Similarly, the second. Only cold water is also sent to the third cooling loads 3b and 3c, and after the cooling is completed, it is returned to the ice heat storage tank 1 from the main pipe 5.

In this way, ice chips or ice grains gradually melt in the main pipe 5 due to the heated water returned from each return pipe 8, but as long as even a small amount of ice chips or ice grains remain, the water temperature remains at 0°C. Retained.

Therefore, if the amount of ice water in the main pipe 5 is controlled so that ice chips or grains remain up to the vicinity of the branch point to the outgoing pipe 7 related to the final third cooling load 3c, which cooling loads 3a to 3c will be affected. Cold water at 0°C will always be supplied.

Therefore, the temperature detection regulator 9 installed near the branch point to the third cooling load 3c detects the temperature of the cold water in the main pipe 5, sends this detection signal to the ice water pump pipe 4, and controls the temperature. The amount of ice water pumped out is controlled so that the temperature is always 0°C.

Note that the ice heat storage tank may be omitted, and the ice produced by the ice maker may be mixed with cold water and sent directly to the main pipe 5.

Further, the number of cooling loads installed in the ice heat storage tank etc. is not limited to three as in the above-described embodiment, but only one unit may be provided.

(Effects of the Invention) As described above, in the cooling device according to the present invention, water containing ice chips or liquid ice is sent to the so-called secondary side of the cooling load, so the latent heat and sensible heat of the ice are utilized on the secondary side. This increases the temperature difference between cooling and heat utilization.

Along with this, the secondary side piping was made smaller in diameter, and 2
A large cooling capacity can be obtained even if the pump on the next side is of low power.

Further, since only cold water is circulated to the cooling load, the coil in the cooling load only needs to be able to withstand cold water of, for example, about 2° C., and does not need to be made of high-cost pipe material. Furthermore, there is no risk of ice chips or the like clogging the cooling load.

Furthermore, even if the cooling load becomes large, the water containing ice chips, which has a large cooling capacity, is sent to the secondary side, so it can quickly respond to the large cooling load. Additionally, when the load is small, only a small amount of cold water needs to be sent to the air conditioner, eliminating waste of pump power.

In addition, in the present invention, the ice heat storage tank is omitted and water containing ice chips or liquid ice is transported from the ice maker to the main pipe,
When cold water whose temperature has increased due to cooling load is returned directly to the ice maker, ice can be easily made without requiring a complicated control system even during cooling load operation.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the ice water cooling system according to the present invention, FIG. 2 is an explanatory diagram showing one embodiment of the ice water separator used in the ice water cooling system of FIG. 1, and FIG. FIG. 3 is an explanatory diagram showing a conventional cold water circulation type cooling device. 1... Ice heat storage tanks 3a to 3c... First to third cooling loads 4... Ice water pump 5... Main piping 6... Ice water cooler
7...Outward pipe 8...Return pipe 9...
Water pump patent applicant Obayashi Co., Ltd. Patent attorney - Color
Ken Kikuichi Patent Attorney Matsu
Masatoshi Hon Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The inlet and outlet ends of the main piping are connected to the ice heat storage tank or the ice maker, and the ice and water in the ice heat storage tank or the ice maker are circulated through the main pipe, and the water is connected to a predetermined position of the main pipe. 1. A cooling device using ice water, characterized in that a cooling load is connected through an ice water separation means that allows only ice water to pass through.