WO1999040383A1

WO1999040383A1 - Cooling system

Info

Publication number: WO1999040383A1
Application number: PCT/JP1998/001268
Authority: WO
Inventors: Tsuneo Harukawa
Original assignee: K E Corporation Co., Ltd.
Priority date: 1998-02-04
Filing date: 1998-03-24
Publication date: 1999-08-12
Also published as: KR20010040590A; JP3051717B2; JPH11223449A; AU6422398A

Abstract

A cooling system comprises brine circulating paths (36, 35, 34, 37) between a chiller unit (30) and an ice thermal storage tank (31), and brine circulating paths (36, 40, 42, 37) between the chiller unit (30) and a brine/water heat exchanger (32), both of which paths are switched to each other at the time of heat accumulation in the ice thermal storage tank (31) and at the same time of cooling by the chiller unit (30). When both heat accumulation and cooling are to be simultaneously effected, brine is circulated through the paths (34, 37, 40, 32). The cooling system further comprises cooling water circulating paths (43, 44, 47, 32, 48, 50) between the ice thermal storage tank (31) and a cooling device (33), and cooling water circulating paths (48, 44, 47, 32) between the brine/water heat exchanger (32) and the cooling device (33), and single cooling of the ice thermal storage tank (31), single cooling of the chiller unit (30), single cooling of the chiller unit (30) at the time of heat accumulation of the ice thermal storage tank (31), and simultaneous cooling of the ice thermal storage tank (31) and the chiller unit (30) are switched to one another.

Description

Specification

Cooling system technical field

The present invention relates to a cooling system for cooling a cooling device using cold water, and particularly to a cooling system that can be used for multiple purposes. Background art

Conventionally, for the safety of food, a system that cools cooked food quickly and quickly and then stores it in a chilled state for a certain period of time has been widely used. Among such foods, in particular, foods containing a large amount of water, liquid foods in containers, or foods packaged in vacuum packs, etc., are cooled in a cold water cooling water tank. In general, an ice storage type is used for a cooling system using such a cold water cooling tank. That is, cooling is performed by storing cold water in an ice heat storage tank, circulating the cold water in a cooling water tank, and storing food in the cooling water tank.

Fig. 15 shows the configuration of a conventional cooling system (Patent No. 198 222 3). In the figure, reference numeral 1 denotes a cooling water tank, which is a water tank for cooling foods and the like, and is filled with cooling water of about 0 ° C to 10 ° C. Reference numeral 2 denotes an ice heat storage tank, which circulates cold water to the cooling water tank 1 via a water supply pipe 3 and a return water pipe 4 so as to maintain the cooling water in the cooling water tank 1 at a constant temperature.

A chiller unit 5 is connected to the ice heat storage tank 2. Chiller unit 5 includes compressor 6, condenser 7, brine cooler 8, blower 9, receiver 10, expansion valve 11, solenoid valve 12, pressure regulating valve 13, and bypass valve 1. It consists of 4 mag and cools the water in the ice thermal storage tank 2.

Further, the ice heat storage tank 2 is provided with a heat exchanger 15, and the brine cooled by the brine cooler 8 of the chiller unit 5 is supplied to the heat exchanger 15 so that the ice heat storage tank 15 is provided. The water in 2 is being cooled.

16 is an auxiliary cooler that cools the water in the ice storage tank 2 to a predetermined temperature. When the work to cool food etc. is to be started before the water is cooled, the water in the cooling water tank 1 is rapidly cooled, and heat is exchanged between the brine and the cooling water. Is ₌

Also, 17 is a brine pump, 18 is a chilled water supply pump, 19 is a cooling water circulation pump, 20, 21, 22, 23 are switching valves, 24 is a bypass valve, and 25 is a check valve It is.

With such a configuration, the water in the ice heat storage tank 2 is cooled the night before the food or the like is cooled. That is, the switching valve 22 is opened, the chiller unit 5 is operated, and brine is supplied to the heat exchanger 15 to freeze the ice in the ice heat storage tank 2. When performing the cooling operation, the switching valve 20 is opened, the chilled water supply pump 18 is operated, the chilled water is supplied from the ice heat storage tank 2 to the chilled water tank 1, and the chilled water in the chilled water tank 1 is cooled. At the same time, the cooling water in the cooling water tank 1 is returned to the ice heat storage tank 2. The returned water is cooled in the ice thermal storage tank 2 and supplied to the cooling water tank 1 again.

On the other hand, when the water in the cooling water tank 1 and the ice heat storage tank 2 is not cooled to the predetermined temperature immediately before the start of the operation, the brine is supplied not only to the heat exchanger 15 but also to the auxiliary cooler 16. Thus, the water in the cooling water tank 1 is cooled by the auxiliary cooler 16 at the same time as the water in the ice heat storage tank 2 is cooled, and the water can be cooled to the predetermined temperature in a shorter time.

That is, when cooling the water, the switching valve 20 is closed, the switching valve 21 is opened, and the cooling water circulation pump 19 is operated, so that the cooling water is supplied between the cooling water tank 1 and the auxiliary cooler 16. Circulate. Further, the switching valve 22 is closed, the switching valve 23 is opened, and the brine is circulated between the auxiliary cooler 16, the heat exchanger 15 and the brine cooler 8. Thereby, the water in the cooling water tank 1 is cooled by the auxiliary cooler 16, and the water in the ice heat storage tank 2 is cooled by the heat exchanger 15.

When one of the waters reaches a predetermined temperature, the switching valve 20 is opened, and the cold water supply pump 18 is operated to circulate the water between the cooling water tank 1 and the ice heat storage tank 2. After that, when both waters cool to a predetermined temperature, the switching valve 22 is opened, the switching valves 21 and 23 are closed, and the cooling water circulation pump is closed. Stop step 19 and begin normal food cooling.

However, in the above-described conventional cooling system, cooling is basically performed only by the ice heat storage tank 2, and thus the cooling capacity of the cooling water tank 1 is limited. If ice is not stored in the ice heat storage tank 2 at the start of cooling, cooling is performed using the auxiliary cooler 16 together, but the auxiliary cooler 16, heat exchanger 15, and brine cooler 8 are used. Since the brine is circulated between the cooling water tank 1 and the water in the cooling water tank 1 and the water in the ice heat storage tank 2 at the same time, there is a problem that it takes time for the water in the cooling water tank 1 to be cooled.

Further, in the conventional cooling system, it is possible to perform an operation of storing cold water in the ice storage tank, a cooling operation using only the ice storage tank, and an operation of storing cooling water in the ice storage tank and performing cooling at the same time. In other words, it was impossible to perform cooling operation by means other than the ice heat storage tank when no cooling water was stored, or cooling operation corresponding to a cooling device with a large cooling load.

The present invention has been proposed to solve the above-mentioned problems of the related art, and an object of the present invention is to provide a cooling system capable of performing a multipurpose cooling operation. Disclosure of the invention

A cooling system according to an aspect of the present invention includes a cooling device that performs cooling with cold water, a chiller unit that cools brine, an ice heat storage tank that stores cold water that is cooled by the brine, and cools cold water with the brine. Chilled water cooling means, first brine circulating means for circulating brine cooled by the chiller unit between the chiller unit and the ice heat storage tank, and cooling by the chiller unit Second brine circulating means for circulating brine between the chiller unit and the cold water cooling means, and wherein the brine cooled by the chiller unit is the first brine circulating means or the second brine circulating means. First brine switching means for switching a brine circulation path so as to circulate one of the brine circulation means, Chira one Yuni' preparative said second brine circulation brine is cooling to the first brine circulating means by Second brine switching means for switching a brine circulation path so as to circulate both of the cooling water and the cooling means, and circulating cold water stored in the ice heat storage tank between the ice heat storage tank and the cooling device. A first chilled water circulating means, a second chilled water circulating means for circulating the chilled water cooled by the chilled water cooling means between the chilled water cooling means and the cooling device, and a chilled water for cooling the cooling device. First chilled water switching means for switching a circulating path of chilled water so as to circulate either the first chilled water circulating means or the second chilled water circulating means; and the first chilled water for cooling the cooling device comprises the first chilled water. It is characterized by comprising second cold water switching means for switching a cooling water circulation path so as to circulate both the cold water circulation means and the second cold water circulation means.

According to this aspect, the following effects can be obtained. That is, when cold water is stored in the ice heat storage tank, the brine circulation path is switched by the first brine switching means, so that the first brine switching means switches between the chiller unit and the ice heat storage tank. Circulate the brine. When cooling is performed only by the ice heat storage tank, the circulating path of the cold water is switched by the first cold water switching means, so that the cold water stored in the ice heat storage tank by the first cold water circulating means is exchanged with the ice heat storage tank. Circulate with the cooling device.

In addition, when cold water is not stored in the ice heat storage tank at the time of cooling, or when cold water is used up during the cooling, etc. The brine is circulated between the chill unit and the chilled water cooling means by the brine circulating means, and the circulating path of the chilled water is switched by the first chilled water switching means. The cooling device is cooled by circulating cold water with the device. Further, when cold water is not stored in the ice heat storage tank when cooling is performed, and when cold water is stored in the ice heat storage tank at the same time as cooling, the first brine switching means is switched to the first one. The brine is circulated between the chiller unit and the ice heat storage tank by the brine circulating means, and the brine is also circulated between the chiller unit and the cold water cooling means by the second brine circulating means. Then, while storing the cold water in the ice heat storage tank, the circulating route of the cold water is switched by the first cold water switching means. Thus, the cooling device is cooled by circulating the cold water between the cold water cooling device and the cooling device by the second cold water circulation device.

On the other hand, when the cooling load of the cooling device is large, by switching the second chilled water switching device, the chilled water stored in the ice heat storage tank by the first chilled water circulating device is circulated between the cooling device and the cooling device. The brine is circulated between the chill unit and the cold water cooling means by the second brine circulation means, and the cold water is circulated between the cold water cooling means and the cooling device by the second cold water circulation means.

As described above, according to this aspect, by switching each switching means, the heat storage of the ice heat storage tank, the cooling only by the ice heat storage tank, the cooling only by the chiller unit, the cooling by the chiller unit and the ice Various operations such as heat storage in the heat storage tank and cooling by both the chiller unit and the ice heat storage tank can be performed. In addition, when the load of the cooling device is large, or when the cold water in the ice storage tank is exhausted, it can be easily handled.

Further, a cooling system according to another aspect of the present invention includes a cooling device that performs cooling with cold water, a chiller unit that cools brine, an ice heat storage tank that stores cold water that is cooled by the brine, and cold water that is cooled by the brine. Connecting the chiller unit and the ice heat storage tank, and circulating the brine cooled by the chiller unit between the chiller unit and the ice heat storage tank. A brine pipe connected to the chiller unit and the cold water cooling means, and a brine cooled by the chiller unit is circulated between the chiller unit and the cold water cooling means. And the brine cooled by the chill unit circulates through one of the first brine pipe and the second brine pipe. A first brine switching valve for switching a brine circulation path so that the brine is cooled, and a brine cooled by the chill unit after cooling either the ice heat storage tank or the cold water cooling means. A third brine pipe connecting the first brine pipe and the second brine pipe so as to cool the other, and a brine cooled by the chiller unit is a third brine pipe. A second brine switching valve for switching the circulation path of the line so as to circulate the air, and the air stored in the ice heat storage tank. A first chilled water pipe for circulating the chilled water between the ice heat storage tank and the cooling device, and flowing the chilled water cooled by the chilled water cooling device between the chilled water cooling device and the cooling device. A first cold water pipe for circulating, and a first cold water circulation path for switching the cold water circulation path such that the cold water for cooling the cooling device circulates in either the first cold water pipe or the second cold water pipe. And a cold water switching valve.

According to this aspect, the following operation is obtained. In other words, when cold water is stored in the ice heat storage tank by switching the first brine switching valve, the brine is circulated between the chiller unit and the ice heat storage tank through the first brine pipe to cool the cold water. When the chilled water is cooled by the means, the brine is circulated between the chill unit and the chilled water cooling means in the second brine pipe. In the case of storing cold water in the ice heat storage tank and cooling the cold water by the cold water cooling means at the same time, by switching the second brine switching valve, the ice storage tank or the cold water cooling is performed through the third brine pipe. The brine cooled in one of the means is supplied to the other and circulated.

When cooling is performed only by the ice heat storage tank by switching the first cold water switching valve, the cold water stored in the ice heat storage tank is circulated through the first cold water pipe and cooled by the cold water cooling means. When cooling is performed only with cold water, the cold water cooled by the cold water cooling means is circulated through the second cold water pipe.

As described above, according to this aspect, various operations such as heat storage in the ice heat storage tank, cooling only in the ice heat storage tank, cooling only in the chill unit, and cooling using the chill unit and heat storage in the ice heat storage tank are performed. Can be. In addition, it is possible to easily cope with the case where the cold water in the ice heat storage tank is not stored at the time of cooling. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a system diagram showing a configuration of a cooling system according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a heat storage operation of the ice heat storage tank 31 according to the embodiment. FIG. 3 is a diagram illustrating an independent cooling operation using the ice heat storage tank 31 according to the embodiment.

FIG. 4 is a diagram illustrating the independent cooling operation by the chiller unit 30 in the embodiment. FIG. 5 is a diagram illustrating the heat storage in the ice heat storage tank 31 and the operation by the chiller unit 30 in the embodiment. It is a figure explaining simultaneous operation of cooling ₌

FIG. 6 is a diagram illustrating combined operation of cooling by the chill unit 30 and cooling by the ice heat storage tank 31 in the embodiment.

FIG. 7 is a system diagram showing a configuration of a cooling system according to the second embodiment of the present invention.

FIG. 8 is a system diagram showing a configuration of a cooling system according to the third embodiment of the present invention.

FIG. 9 is a diagram illustrating an independent cooling operation using the ice heat storage tank 31 according to the embodiment.

FIG. 10 is a diagram illustrating a single cooling operation by the chiller unit 30 in the embodiment.

Figure 1 1 is a diagram for explaining the simultaneous operation of cooling by the heat storage and Chirayuni' DOO ³ 0 ice thermal storage tank 3 1 in the embodiment.

FIG. 12 is a diagram illustrating combined operation of cooling by chill unit 30 and cooling by water heat storage tank 31 in the same embodiment.

FIG. 13 is a diagram showing a configuration example when the number of cooling devices 80 is increased in the cooling system according to the embodiment.

FIG. 14 is a diagram showing a configuration example when the number of cooling devices 81 is increased in the cooling system according to the embodiment.

FIG. 15 is a system diagram showing a configuration of a conventional cooling system. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[1. First Embodiment] [1-1. Configuration]

FIG. 1 is a system diagram showing a configuration of a cooling system according to a second embodiment of the present invention. In this figure, the cooling system is provided with a chiller unit 30, an ice storage tank 31, a brine-water heat exchanger 32, and a cooling device 3. The chiller unit 30 has the same configuration as the conventional chiller unit 5 shown in FIG. 15, and is provided as a cooling and circulation means for brine. The heat storage tank 31 and the brine / water heat exchanger 33 are supplied and the brine is recovered therefrom.

The ice heat storage tank 31 has the same configuration as the conventional ice heat storage tank 2 shown in FIG. 15 and includes a heat exchanger 34 such as an ice making coil therein. By supplying brine from the chill unit 30 to 4, the internal water is cooled. Further, the brine-water heat exchanger 32 is a chilled water cooling means, which exchanges heat between the brine supplied from the chill unit 30 and water to form chilled water, and converts the chilled water to the cooling device 33. It circulates between the two.

Further, the cooling device 33 is composed of, for example, a cooling water tank or the like, and is supplied with cold water stored in the ice heat storage tank 31 or cold water heat-exchanged by the brine-water heat exchanger 32. Cooling is performed.

Further, specifically, a brine feed pipe 35 is provided at one end of the heat exchanger 34 of the ice heat storage tank 31, and the brine feed pipe 35 is chilled through the brine feed pipe 36. Connected to one unit 30. A brine return pipe 37 is provided at the other end of the heat exchanger 34, and the brine return pipe 37 is provided with a switching valve 38 and a brine pump 39. The brine feed pipes 36 and 35 and the brine return pipe 37 form a brine circulation path between the chiller unit 30 and the heat exchanger 34.

A brine feed pipe 4 () is connected to one end of the brine-water heat exchanger 32, and the brine feed pipe 40 is connected to the above-mentioned brine feed pipe 36 via a three-way switching valve 41. It is connected to the. A brine return pipe 42 is connected to the other end of the brine / water heat exchanger 32, and the brine return pipe 37 is It is connected between the switching valve 38 and the brine pump 39. These brine feed pipe 3 6, 4 0, brine return pipe 4 2, 3 7, further _c brine circulation path between the fliers one unit 3 0 and brine 'water heat exchanger 3 2 are formed The chilled water supply pipes 4 3 and 4 4 are connected between the cooling device 3 3-and the ice heat storage tank 31, and the chilled water supply pipe 43 is provided with a switching valve 45. 4 is provided with a cold water pump 46. On the other hand, a chilled water return pipe 47 is connected between the cooling device 33 and the brine 'water heat exchanger 32-and a brine-water heat exchanger 32 and an ice heat storage tank 31 are connected. Between them, cold water return pipes 48, 49, 50 are connected. Further, the chilled water return pipe 50 is provided with a switching valve 51. The chilled water supply pipes 43, 44, the chilled water return pipe 47, and the chilled water return pipes 48, 49, 50 allow circulation of chilled water between the ice heat storage tank 31 and the cooling device 33. A road is formed.

Further, the chilled water return pipe 49 is connected to the chilled water feed pipes 43 and 44 via a mixing three-way valve 52. A sensor (not shown) is connected to the mixing three-way valve 52. The sensor detects the temperature of the cold water between the cold water pump 46 and the cooling device 33, that is, the temperature of the cold water supplied to the cooling device 33. Is to be detected. The opening and closing of the mixing three-way valve 52 is controlled based on the detected water temperature, and the mixing ratio of the chilled water from the chilled water supply pipe 43 and the chilled water after circulation from the chilled water return pipe 49 changes. It has become. That is, when the water temperature detected by the sensor is lower than the predetermined temperature, the ratio of the cold water from the chilled water return pipe 49 increases, and when the water temperature is higher than the predetermined temperature, the ratio of the chilled water from the chilled water supply pipe 43 is increased. Is controlled to increase.

On the other hand, the chilled water return pipe 48 is connected between the mixing three-way valve 52 and the chilled water pump 46 in the chilled water supply pipe 44 via the switching valve 53. The piping 48, the chilled water supply piping 44, and the chilled water return piping 47 form a circulation path for the chilled water between the brine-water heat exchanger 32 and the cooling device 33.

[1-2. Action and effect]

The operation of the cooling system configured as described above will be described: [Heat storage operation of ice heat storage tank 3 1]

First, the heat storage operation of the ice heat storage tank 31, that is, the operation of freezing and cooling the water in the ice heat storage tank 31 performed at night or the like will be described with reference to FIG. In this case, when the three-way switching valve 41 is switched, the flow paths of the brine feed pipes 36 and 35 are opened. Then, when the switching valve 38 is opened and the brine pump 39 is operated, a flicker is generated. The brine cooled in the unit 30 is supplied to the heat exchanger 34 of the ice heat storage tank 31 via the blind feed pipes 36 and 35. The cooled brine flows in the heat exchanger 34 in one direction, and is collected in the chill unit 30 via the brine return pipe 37.

Due to the flow of the brine in the heat exchanger 34, the heat exchanges between the brine and the water around the heat exchanger 34. As a result, a part of the water in the ice heat storage tank 31 is frozen and the remaining water is frozen. Water is stored as cold water at 0 ° C.

[Single cooling operation with ice storage tank 31]

Next, an operation of cooling the cooling device 33 by only the ice heat storage tank 31 in the daytime or the like will be described with reference to FIG. In this case, the switching valve 53 is closed, and the switching valves 45 and 51 are opened. When the chilled water pump 46 operates in this state, the chilled water stored in the ice heat storage tank 31 is supplied to the cooling device 33 via the chilled water supply pipes 43, 44. The chilled water that has cooled the cooling device 33 is returned to the ice heat storage tank 31 via the chilled water return pipe 47, the brine 'water heat exchanger 32, and the chilled water return pipes 48, 49, 50.

At this time, the temperature of the chilled water supplied to the cooling device 33 is detected by a sensor (not shown). When the detected temperature is lower than the predetermined temperature, the ratio of the chilled water from the chilled water return pipe 49 to the rate of mixing the chilled water from the chilled water feed pipe 43 and the chilled water from the chilled water return pipe 49 The mixing three-way valve 52 is controlled so that the pressure rises. On the other hand, when the detected temperature becomes higher than the predetermined temperature, on the other hand, the mixing three-way valve 52 is controlled so that the ratio of the chilled water from the chilled water feed pipe 43 increases. In this way, cold water of a predetermined temperature is always supplied to the cooling device 33.

[Single cooling operation using the chiller unit 30] Next, an operation of cooling the cooling device 33 by only the chiller unit 30 will be described with reference to FIG. In this case, the three-way switching valve 41 is switched, so that the flow paths of the brine feed pipes 36 and 40 are opened. Also, the switching valves 38, 45, 51 and the mixing three-way valve 52 are closed, and only the switching valve 53 is opened. _{C In} this state, when the brine pump 39 is operated, the chiller unit 30 is opened. The brine cooled in this step is supplied to the brine-water heat exchanger 32 via the brine feed pipes 36 and 40. Then, the brine is heat-exchanged with water in the brine-water heat exchanger 32, and then recovered from the brine return pipe 42 to the chill unit 30 via the brine return pipe 37.

On the other hand, when the chilled water pump 46 operates, the chilled water cooled by heat exchange with the brine in the brine-water heat exchanger 32 is transferred to the cooling device 33 via the chilled water return pipe 48 and the chilled water supply pipe 44. Supplied. Then, the chilled water that has cooled the cooling device 33 is returned to the brine-water heat exchanger 32 via the chilled water return pipe 47, and is cooled again by the brine.

The cooling operation using the above-mentioned chiller unit 30 alone is performed, for example, in the following case. In other words, in the above-described cooling operation using the ice heat storage tank 31 alone, all the ice in the ice heat storage tank 31 was exhausted due to, for example, an increase in foods and chemicals cooled by the cooling device 33. This is the case.

As described above, according to the present embodiment, since the cooling device 33 can be cooled only by the chiller unit 3 (), the switching valve is switched even when the ice heat storage tank 31 cannot make up for it. Can be easily dealt with.

[Simultaneous operation of heat storage in ice heat storage tank 31 and cooling by chill unit 30] Next, the water in the ice heat storage tank 31 is frozen and cooled, and the cooling device 3 by the chill unit 30 is cooled. The operation for performing the cooling in step 3 will be described with reference to FIG. In this case, the three-way switching valve 41 is switched, so that the flow paths of the brine feed pipes 36 and 35 are opened. Further, the switching valves 38, 45, 51 and the mixing three-way valve 52 are closed, and only the switching valve 53 is opened. In this state, when the brine pump 39 operates, the brine cooled in the chiller unit 30 is supplied to the heat exchanger 34 of the ice storage tank 31 via the brine delivery pipes 36, 35. This-part of the water in the ice heat storage tank 31 is frozen, and the remaining water is stored as cold water at 0 ° C.

The brine flowing in the heat exchanger 34 in this manner is supplied from the brine return pipe 37 to the brine 'water heat exchanger 32 via the brine feed pipe 40 _c . The brine return pipe 3 The part connected to the brine 'water heat exchanger 32 via the brine transmission pipe 40 from the part 7 is a part for supplying the brine from the heat exchanger 34 to the brine ♦ water heat exchanger 32.

Then, in the brine-water heat exchanger 32, the brine is subjected to heat exchange with water, and is recovered from the brine return pipe 42 to the chill unit 30 via the brine return pipe 37. By such circulation of the brine, the water in the ice heat storage tank 31 is cooled, and heat exchange between the brine and the water in the brine-water heat exchanger 32 is performed.

On the other hand, when the chilled water pump 46 is operated, the chilled water cooled in the brine-water heat exchanger 32 is supplied to the cooling device 33 via the chilled water return pipe 48 and the chilled water supply pipe 44, and the chilled water is returned. The water is returned to the brine / water heat exchanger 32 via the pipe 47. In this way, the water in the ice heat storage tank 31 is cooled by the brine cooled in the chiller unit 30, and at the same time, the cooling device 33 is cooled.

The simultaneous operation of the heat storage in the ice heat storage tank 31 and the cooling by the chill unit 30 as described above is performed, for example, in the following case. That is, when the ice in the ice storage tank 31 is not stored in time at night, or when all the ice in the ice storage tank 31 is exhausted in the cooling operation using the ice storage tank 31 alone. For example, when ice is not sufficiently stored at the time of cooling. In such a case, according to the present embodiment, ice can be stored in the ice heat storage tank 31 at the same time that the cooling device 33 is cooled.

[Chilling unit 30 and ice heat storage tank 3 1 combined cooling operation]

Next, the operation of cooling the cooling device 33 with both the chiller unit 30 and the ice heat storage tank 31 will be described with reference to FIG. In this case, as in the case of the single cooling operation using the chiller unit 30 described above, the chiller unit 30 and the By circulating the brine between the water heat exchanger 32 and the brine, the chilled water circulating between the water heat exchanger 32 and the cooling device 33 is cooled.

On the other hand, the switching valve 53 is closed, the switching valves 45 and 51 are opened, and the chilled water pump 46 is operated, so that the chilled water stored in the ice heat storage tank 31 is supplied with chilled water. It is supplied to the cooling device 33 via the pipes 43 and 44. At this time, an appropriate ratio of the cold water supplied from the brine / water heat exchanger 32 through the cold water return pipes 48 and 49 to the cold water from the ice heat storage tank 31 by the mixing three-way valve 52 is provided. Mixed in. The chilled water that has cooled the cooling device 33 is returned to the brine-water heat exchanger 32 via the chilled water return pipe 47, cooled again, and sent out to the chilled water return pipe 48. Part of the chilled water flowing through the chilled water return pipes 48, 49 is partially returned to the ice heat storage tank 31 via the chilled water return pipe 50, and the rest is iced by the mixing three-way valve 52 as described above. It is mixed with cold water from heat storage tank 31.

The combined operation of cooling by the ice heat storage tank 31 and cooling by the chill unit 30 as described above is performed when the cooling load of the cooling device 33 is large, such as when it is necessary to rapidly cool the object to be cooled. Done in In this manner, in the present embodiment, cooling that was impossible only with the ice heat storage tank 31 can be easily performed only by switching the switching valve.

Further, according to the present embodiment having the above-described configuration, for example, even when operating only with the ice heat storage tank 31, the cold water is circulated through the brine-water heat exchanger 32, which is particularly Since no piping is provided, there is no need to increase the number of piping wastefully, and there is no need to arrange a switching valve or the like, so that a cooling system can be configured at low cost.

[2. Second Embodiment]

[2-1. Configuration]

FIG. 7 is a system diagram showing a configuration of a cooling system according to the second embodiment of the present invention. In the present embodiment, two cooling devices 60 and 61 are arranged in parallel, instead of the cooling device 33 that was only one in the above-described first embodiment.

That is, as shown in FIG. 7, the chilled water supply pipe 44 is connected to the chilled water supply pipes 62 and 63. And connected to the cooling devices 60 and 61, respectively. The chilled water feed pipes 62 and 63 are provided with switching valves 64 and 65, respectively. Further, chilled water return pipes 66 and 67 are connected to the cooling devices 60 and 61, respectively, and these are connected to the chilled water return pipe 47.

[2-2. Action and effect]

With this configuration, when cooling only the cooling device 60, the switching valve 64 is opened and the switching valve 65 is closed, and the chilled water from the chilled water supply pipe 44 flows only through the chilled water supply pipe 62. The cooling device 60 is cooled so as to flow to the cold water return pipe 47 via the cold water return pipe 66. On the other hand, when cooling only the cooling device 6 1, the switching valve 64 is closed and the switching valve 65 is opened, and the chilled water from the chilled water sending pipe 44 flows only through the chilled water sending pipe 63, and 1 is cooled to flow to the cold water return pipe 47 via the cold water return pipe 67.

When cooling both of the cooling devices 60 and 61, both the switching valves 64 and 65 are opened, and the chilled water from the chilled water supply pipe 44 is supplied to both the chilled water supply pipes 62 and 63. Let it flow. Thereby, the two cooling devices 60 and 61 can be cooled simultaneously.

As described above, according to the present embodiment, the single cooling operation using the ice heat storage 31 in the above-described first embodiment, the single cooling operation using the chiller unit 30, and the operation of the ice heat storage tank 31 are performed. In the simultaneous cooling operation using the heat storage chiller unit 30 and the cooling operation using the chiller unit 30 and the ice storage tank 31 together, both cooling units 60 and 61 must be cooled simultaneously. Can be. ◎

The number of cooling devices connected in parallel is not limited to two, and may be three or more.

[3. Third Embodiment]

[3-1. Configuration]

FIG. 8 is a system diagram showing a configuration of a cooling system according to the third embodiment of the present invention. As shown in the figure, in the present embodiment, two cooling devices 70 and 71 are provided, each of which is cooled only by the ice heat storage tank 31 and cooled only by the chiller unit 30. And different cooling can be performed simultaneously. First, to the cooling device 70, a chilled water supply pipe 44 for sending chilled water from the ice heat storage tank 31 and a chilled water return pipe 72 are connected. The chilled water return pipe 72 is provided with a switching valve 73, and is connected to a chilled water return pipe 50 for returning chilled water to the ice heat storage tank 31 upstream of the switching valve 73, and is connected to brine and water. It is connected to a cold water return pipe 47 connected to the heat exchanger 32. In the chilled water supply pipe 72, the portion on the chilled water return pipe 47 side from the connection point with the chilled water return pipe 50 is used to supply chilled water between the brine / water heat exchanger 32 and the cooling device 71. When circulating, cool water is sent from the cooling device 70 side to the cold water return pipe 4 7 side, and when circulating cold water between the ice heat storage tank 31 and the cooling device 71, conversely, the cooling device 71 Chilled water is supplied from the side to the chilled water return pipe 50 side.

On the other hand, a chilled water return pipe 48 for sending chilled water from the brine * water heat exchanger 32 is connected to another cooling device 71. The cold water return pipe 48 is provided with a cold water pump 74. Further, the cooling device 71 is connected to a brine-water heat exchanger 32 via a cold water return pipe 47. A chilled water supply pipe 75 provided with a switching valve 76 is connected to the chilled water return pipe 48, and the chilled water supply pipe 75 is connected to the mixing three-way valve 52 in the chilled water supply pipe 44. It is connected between the cold water pumps 46.

When chilled water is circulated between the ice storage tank 31 and the cooling device 71, the chilled water supply pipe 75 should be such that chilled water is sent from the chilled water supply pipe 44 to the chilled water return pipe 48. When circulating cold water between the water heat exchanger 32 and the cooling device 70, conversely, send cold water from the cold water return pipe 4 8 side to the cold water supply pipe 4 4 side. It is like that.

C 3-2. Action]

The operation of the cooling system configured as described above will be described. Note that the ice heat storage operation is the same as in the first embodiment described above, and a description thereof will be omitted.

[Single cooling operation with ice storage tank 31]

First, the operation of cooling the cooling devices 70 and 71 only by the ice heat storage tank 31 will be described with reference to FIG. In this case, the switching valves 45, 51, 73, 76 Are all open. In this state, when the chilled water pumps 46, 74 are operated, the chilled water stored in the ice heat storage tank 31 is supplied to the cooling device 70 through the chilled water supply pipes 43, 44. The cold water that has cooled the cooling device 70 is returned from the cold water return pipe 72 to the ice heat storage tank 31 via the cold water return pipe 50.

On the other hand, part of the chilled water flowing through the chilled water feed pipes 43 and 44 is supplied to the cooling device 71 from the chilled water return pipe 48 via the chilled water feed pipe 75. The chilled water that has cooled the cooling device 71 flows from the chilled water return pipe 47 to the chilled water return pipe 72, and is returned to the ice heat storage tank 31 via the chilled water return pipe 50.

[Single cooling operation using the chiller unit 30]

Next, the operation of cooling the cooling devices 70 and 71 only by the chiller unit 30 will be described with reference to FIG. In this case, similarly to the case of the single cooling operation using the chiller unit 30 in the first embodiment described above, the brine is connected between the chiller unit 30 and the brine-water heat exchanger 32. By circulating, the chilled water that cools between the brine-water heat exchanger 32 and the cooling devices 70 and 71 is cooled.

On the other hand, the switching valves 45, 51 and the mixing three-way valve 52 are closed, and the switching valves 73, 76 are opened. When the chilled water pumps 46, 74 operate in such a state, the chilled water cooled in the brine-water heat exchanger 32 is supplied to the cooling device 71 via the chilled water return pipe 48, and The water is supplied from the cold water return pipe 48 to the cooling device 70 through the cold water feed pipe 75 and the cold water feed pipe 44.

Then, the chilled water that has cooled the cooling device 70 is sent out from the chilled water return piping 72 to the chilled water return piping 47 and mixed with the chilled water from the cooling device 71. The cold water thus mixed is cooled again in the brine-water heat exchanger 32 and then supplied to the cooling devices 70 and 71, respectively.

[Simultaneous operation of heat storage in the ice heat storage tank 31 and cooling by the chill unit 30] Next, the water in the ice heat storage tank 31 is frozen and cooled, and the cooling device 3 by the chill unit 30 is used. The operation of performing the cooling of 3 will be described with reference to FIG. In this case, similar to the case of the heat storage of the ice heat storage tank 31 and the cooling operation by the chiller unit 30 in the first embodiment (see FIG. 5), the chiller is used. By circulating the brine of the unit 30, the water in the ice heat storage tank 31 is cooled, and the brine-water heat exchanger 32 exchanges heat with the brine. On the other hand, as in the case of the single cooling operation using the chiller unit 30 described above, the cooling water cooled in the brine-water heat exchanger 32 is supplied to the cooling devices 70 and 71 so that the cooling device is cooled. 70 and 71 are cooled.

[Chilling unit 30 · Ice thermal storage tank 3 1 combined cooling operation]

Next, an operation of cooling the cooling devices 70 and 71 by using the chill unit 30 and the ice heat storage tank 31 together will be described with reference to FIGS. In this case, the cold water stored in the ice heat storage tank 31 is supplied to the cooling device 70, and the cold water cooled in the brine heat exchanger 32 is supplied to the cooling device 71. .

First, the brine circulates between the chiller unit 30 and the brine-water heat exchanger 32 in the same manner as in the case of the chiller unit alone cooling operation described above, whereby the brine-water heat exchanger The cold water circulating between 32 and the cooling devices 70 and 71 is cooled.

Further, the switching valves 73 and 76 are closed, the switching valves 45 and 51 are opened, and the chilled water pumps 46 and 74 are operated. The chilled water stored in the ice heat storage tank 31 is supplied to the cooling device 70 from the chilled water supply pipes 43, 44, and after cooling the cooling device 70, the chilled water is returned from the chilled water return pipe 72. It is returned to the ice thermal storage tank 31 via the pipe 50. On the other hand, the chilled water cooled by the brine / water heat exchanger 32 is supplied from the chilled water return pipe 48 to the cooling device 71, and returned to the brine / water heat exchanger 32 via the chilled water return pipe 47. It is.

As described above, since different cooling operations are performed for the cooling device 70 and the cooling device 71, the temperature of the chilled water can be made different, and a different temperature setting can be set for each of the cooling devices 70 and 71. Becomes possible.

In this embodiment, as shown in FIGS. 13 and 14, the number of cooling devices can be increased. That is, for example, as shown in FIG. 13, a cooling device 80 is provided in parallel with the cooling device 70, and the chilled water sending pipe 44 is divided into chilled water sending pipes 8 1, 8 2, and the cooling devices 70, 8, respectively. Connect to 0 and cool water return piping to cooling device 80 8 3 is connected and connected to the cold water return pipe 47 and the cold water return pipe 50. Thus, the cooling device 70 and the cooling device 80 can be simultaneously cooled at the same temperature. Also, as shown in Fig. 14, a cooling device 90 is provided in parallel with the cooling device 71, and the chilled water return pipe 48 is divided into chilled water sending pipes 9 1 and 9 2, and the cooling devices 71 and 90 are respectively provided. Then, connect the cooling water return pipes 93, 94 to the cooling devices 71, 90, respectively, and connect them to the cold water return pipe 47. Thereby, the cooling devices 71 and 90 can be simultaneously cooled at the same temperature.

[4. Other Embodiments]

Note that the cooling device of the present invention is not limited to the above-described embodiment, and specific shapes of the respective members, or respective mounting positions and methods can be appropriately changed. For example, when cooling brine in the ice storage tank 31 and circulating brine to both the brine water heat exchanger 32, brine and water heat after passing through the heat exchanger 34 of the ice storage tank 31 Although it is supplied to the exchanger 32, the configuration may be reversed.

In addition, when cooling water in the ice storage tank 31 and cooling with the chiller unit 30 at the same time as cooling the ice storage tank 31, the cooling in the ice storage tank 31 should be performed at the same time when the ice storage tank 31 has stored some cold water. It may be.

Further, the cooling device 33 is not limited to the cooling water tank, and may be an air conditioner. That is, the chilled water supplied to the cooling device 33 may be configured to be used for cooling the air conditioner. Industrial applicability

As described above, according to the present invention, not only the heat storage operation of the ice heat storage tank, the cooling only by the ice heat storage tank, and the simultaneous operation of the cooling and the heat storage of the ice heat storage tank, but also the cooling operation only by the chill unit In addition, since the cooling operation using the ice heat storage tank and the cooling using the chiller unit can be performed at the same time, it is possible to provide a cooling system that can perform a multipurpose operation.

Claims

The scope of the claims

1. A cooling device for cooling with cold water,

Chiller unit for cooling brine,

An ice heat storage tank that stores cold water cooled by the brine,

Cold water cooling means for cooling the cold water by the brine,

First brine circulating means for circulating brine cooled by the chiller unit between the chiller unit and the ice heat storage tank;

Second brine circulating means for circulating brine cooled by the chiller unit between the chiller unit and the cold water cooling means,

First brine switching means for switching a brine circulation path such that the brine cooled by the chill units circulates through either the first brine circulating means or the second brine circulating means;

Second brine switching means for switching a circulation path of the brine so that the brine cooled by the chill unit circulates through both the first brine circulating means and the second brine circulating means;

First cold water circulation means for circulating the cold water stored in the ice heat storage tank between the ice heat storage tank and the cooling device;

Second chilled water circulating means for circulating the chilled water cooled by the chilled water cooling means between the chilled water cooling means and the cooling device;

First chilled water switching means for switching a chilled water circulation path such that chilled water for cooling the cooling device circulates through either the first chilled water circulating means or the second chilled water circulating means;

Second chilled water switching means for switching a chilled water circulation path such that chilled water for cooling the cooling device circulates through both the first chilled water circulating means and the second chilled water circulating means;

A cooling system comprising:

2. A cooling device for cooling with cold water; Chiller unit for cooling brine,

An ice heat storage tank that stores cold water cooled by the brine,

Cold water cooling means for cooling the cold water by the brine,

A first brine pipe connecting the chiller unit and the ice heat storage tank, and circulating brine cooled by the chiller unit between the chiller unit and the ice heat storage tank; ,

A second brine pipe connecting the chiller unit and the cold water cooling means, and circulating brine cooled by the chill unit between the chiller unit and the cold water cooling means;

A first brine switching valve that switches a brine circulation path such that the brine cooled by the chill units circulates through one of the first brine pipe and the second brine pipe.

The first brine pipe and the second brine pipe such that the brine cooled by the chill unit cools one of the ice heat storage tank and the chilled water cooling unit and then cools the other. A third brine pipe connecting the

A second brine switching valve for switching a brine circulation path such that the brine cooled by the chiller circulates through the third brine pipe;

A first cold water pipe for circulating cold water stored in the ice heat storage tank between the ice heat storage tank and the cooling device;

A second chilled water pipe for circulating the chilled water cooled by the chilled water cooling means between the chilled water cooling means and the cooling device;

A first chilled water switching valve for switching a chilled water circulation path such that chilled water for cooling the cooling device circulates through either the first chilled water pipe or the second chilled water pipe;

A cooling system comprising:

3. The first brine pipe is connected to the chiller unit and connected to the chiller unit. A first brine delivery pipe for delivering brine cooled by the unit, a second brine delivery pipe connected to the first brine delivery pipe and the ice storage tank, and an ice storage tank. A first brine return pipe that is connected and sends out the brine that has cooled the ice storage tank, and a first brine return pipe that is connected to the first brine return pipe and the chiller unit and connects the brine to the chiller unit. The second brine return pipe and return pipe

The second brine pipe, the first brine feed pipe, a third brine feed pipe connected to the first brine feed pipe and the chilled water cooling means, the chilled water cooling means and the third A third brine return pipe connected to the second brine return pipe, and the second brine return pipe,

The first brine switching means is configured to switch to supply the brine from the first brine supply pipe to either the second brine supply pipe or the third brine supply pipe.

The third brine pipe may be configured to connect one of the first brine return pipe and the third brine feed pipe, or the third brine return pipe and the second brine feed pipe. 3. The cooling system according to claim 2, wherein the cooling system is configured as follows.

4. The cooling system according to claim 2, wherein the cooling device includes a plurality of cooling devices connected in parallel with each other.

5. The first cold water pipe is composed of a cold water circulation pipe that connects the ice heat storage tank, the cooling device, and the cold water cooling means in series,

The second chilled water pipe includes a portion of the chilled water circulation pipe that connects between the chilled water cooling means and the cooling device, and a chilled water connection pipe that connects the chilled water cooling means and the cooling device. 5. The cooling system according to claim 2, 3, or 4, wherein the cooling system is used.

6. The cold water for cooling the cooling device is the first cold water pipe and the second cold water. The cooling system ( _c ) according to any one of claims 2 to 5, further comprising a second chilled water switching valve that switches a circulating path of the chilled water so as to circulate through both of the pipes.

7. The first cold water pipe is configured to connect the plurality of cooling devices in parallel to the ice heat storage tank,

The second chilled water pipe is configured to connect the plurality of cooling devices in parallel to the chilled water cooling means,

The cold water stored in the ice heat storage tank is circulated to any of the plurality of cooling devices, and the cold water cooled by the cold water cooling means is transferred to a cooling device other than the cooling device in which the cold water from the ice heat storage tank circulates. 5. The cooling system according to claim 4, further comprising a third chilled water switching valve that switches a chilled water circulation path so as to circulate the chilled water.