JPH1194475A - Cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent cooling water from being contaminated without sacrifice of the performance of a cooler for cooling water. SOLUTION: A cooling exchanger 15 comprises a moisture permeation membrane 5 which passes steam but blocks water. The cooling exchanger 15 is disposed in the air passage 24 at a cooling tower section 20 and the cooling water is brought into contact with the air through the moisture permeation membrane 5. Since a part of cooling water is evaporated and discharged into the air through the moisture permeation membrane 5, high cooling performance can be sustained. Furthermore, cooling water can be protected against contamination because it is not mixed with gas or contaminant in the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling cooling water, and more particularly to a countermeasure against cooling water contamination.

[0002]

2. Description of the Related Art Conventionally, a cooling device for cooling an object by cooling water is disclosed in, for example, "Handbook of Air Conditioning and Sanitary Engineering".
No. 470 of “Part 4 Air Conditioning Equipment” (edited and published by the Society of Air Conditioning and Sanitary Engineers, 1995, 12th edition)
As disclosed on pages 473 to 473, cooling water is cooled by a cooling tower. The cooling towers are classified into open-type cooling towers and closed-type cooling towers depending on the method of contact between air and cooling water.

[0003] The above-mentioned open type cooling tower is configured such that an air passage is provided in a casing and air flows through the air passage by the action of a fan or the like, while cooling water is sprinkled into the air passage. ing. Then, the air and the cooling water come into direct contact in the air passage and a part of the cooling water evaporates, and the enthalpy of the evaporated water vapor is taken from the cooling water to cool the cooling water.

[0004] In the closed cooling tower, air flows through an air passage in the casing similarly to the open cooling tower, while the air passage is constituted by a heat transfer tube and the like, and cooling water is provided inside. A circulating closed coil is provided, and water is sprinkled on the closed coil. Then, the water sprinkled on the closed coil comes into contact with air and a part of the water evaporates, thereby cooling the water. Heat exchange through the cooling water in the closed coil.

[0005]

However, in the above-mentioned open type cooling tower, since the cooling water and the air are in direct contact with each other, the cooling performance is excellent, but gas and impurities in the air are mixed into the cooling water. There is a problem that the cooling water is contaminated. In addition, there has been a problem that the contamination of the cooling water causes corrosion of the pipes and the heat exchanger, and the cooling performance is reduced.

In the closed type cooling tower, the cooling water and the air come into contact with each other through a closed coil, so that there is no problem of the cooling water contamination as in the open type cooling tower, but the direct contact with the air is made. Heat exchange between the water cooled by the cooling water and the cooling water, cooling of the cooling water by air is indirect, and there is a problem that the cooling performance is lower and the equipment becomes larger as compared with the open cooling tower. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling device that maintains cooling performance and prevents cooling water from being contaminated.

[0008]

According to the present invention, cooling water is brought into contact with a cooling water through a moisture permeable membrane (5), a part of the cooling water is evaporated to cool the cooling water, and the water vapor is discharged into the air. It is something to do.

More specifically, a means implemented by the first aspect of the present invention is to provide a cooling exchanger (15) in a cooling water circulation passage (13), and to provide the cooling exchanger (15) with steam. The cooling water and the outside air are brought into contact with each other through a moisture permeable membrane (5) that permeates and inhibits the permeation of water. It is configured so that

[0010] The means adopted by the invention according to claim 2 is the same as the invention described in claim 1, except that the cooling exchanger (15) is used.
The heat exchanger (11) configured to cool the object to be cooled by the cooling water and the pump (12) are sequentially arranged in the circulation passage (1).
The cooling water circuit (10) is connected to a water supply means (30) for supplying water to the cooling water circuit (10). is there.

The means adopted by the invention of claim 3 is the same as the invention of claim 2, except that the water supply means (30) is
It is provided with a reverse osmosis membrane (33) permeable to water, and the water permeated through the reverse osmosis membrane (33) is supplied into the cooling water circuit (10).

According to a fourth aspect of the present invention, in the second or third aspect of the invention, the cooling water is formed into an antifreeze liquid by mixing a substance which lowers the freezing point of the cooling water. is there.

According to a fifth aspect of the present invention, there is provided a method according to any one of the second to fourth aspects, wherein the cooling water is covered with a latent heat storage agent by a coating material. Is mixed.

According to a sixth aspect of the present invention, there is provided the refrigeration circuit (41) comprising the refrigeration cycle, wherein the heat exchanger (11) is provided in the refrigeration cycle according to any one of the second to fourth aspects.
Is connected, and the refrigeration circuit (41) in which the cooling water is the object to be cooled
Is configured to cool the working fluid.

According to a seventh aspect of the present invention, there is provided a method according to the sixth aspect, wherein a large number of microcapsules having a latent heat storage agent covered with a coating material are mixed into the cooling water while the latent heat is mixed. Heat exchanger, heat exchanger with melting point (15)
Higher than the cooling water temperature at the outlet of the heat exchanger (11)
And a material having a temperature lower than the temperature of the cooling water at the outlet.

The measures taken by the invention described in claim 8 are the same as those in claim 6 or 7, except that the cooling water circuit (1
0) and the refrigeration circuit (41) are housed in a casing and integrally formed.

According to a ninth aspect of the present invention, the heat exchanger (11) of the cooling water circuit (10) is replaced by an air heat exchanger (11). 50) to cool the room air, which is the object to be cooled, with cooling water.

The means adopted by the invention according to claim 10 is the invention according to any one of claims 2 to 4, wherein the heat exchanger (11) of the cooling water circuit (10) is replaced with an air heat exchanger (11). 50), the cooling water is used to cool the room air that is the object to be cooled, and the cooling water is mixed with a large number of microcapsules in which the latent heat storage agent is covered with the coating material.
The latent heat storage agent is composed of a substance whose melting point is a temperature near the dew point of room air.

According to an eleventh aspect of the present invention, in the ninth or tenth aspect, the cooling water is generated, and the cooling water in the cooling water circuit (10) is cooled by the cooling heat. The auxiliary refrigerator (60) is provided.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, the heat exchange of the cooling water circuit (10) is performed with a radiating heat exchanger (55). The cooling water circuit (10) is connected to a cooling heat exchanger (56), while the cooling water circuit (10) is connected to the cooling heat exchanger (56). (55) and the cooling heat exchanger (56) are connected to a refrigeration circuit (41) constituting a refrigeration cycle, and the radiating heat exchanger (55) is connected to the refrigeration circuit (41) in which The working fluid is cooled, and the cooling heat exchanger (56) is configured to cool the cooling water with cold generated by the refrigeration circuit (41). A first cooling operation in which cooling water circulates between the air heat exchanger (50) and the cooling exchanger (15) to cool the indoor air; The cooling water circulates between the cooling heat exchanger (15) and the working fluid in the refrigeration circuit (41) to radiate heat, and at the same time, the cooling water exchanger (56) and the air heat exchanger (50) The cooling water circulates and can be switched between a second cooling operation in which room air is cooled by cooling water cooled by cold generated in the refrigeration circuit (41).

According to the first aspect of the present invention, in the cooling exchanger (15), the cooling water and the air do not come in direct contact with each other, and the moisture permeable membrane is formed.
(5) Make contact through. Then, water vapor generated by evaporating a part of the cooling water is released into the air through the moisture permeable membrane (5), and the cooling water is cooled by the evaporation.

In the cooling water circuit (10), the cooling water cooled by the cooling exchanger (15) flows through the circulation passage (13) by the pump (12). It reaches the heat exchanger (11). Then, the cooling water is supplied to the heat exchanger (11).
Cools the object to be cooled, and then the cooling exchanger (15)
And is cooled again, and this circulation is repeated. In the cooling exchanger (15), part of the cooling water evaporates and is released into the air, reducing the amount of cooling water in the cooling water circuit (10), while cooling by the water supply means (30). Water circuit
(10) Supply water into the cooling water circuit (10) to keep the amount of cooling water constant.

According to the third aspect of the present invention, a reverse osmosis membrane is provided.
(33) Only the water that does not contain impurities permeated through the cooling water circuit
(10) Supplied inside.

Further, according to the present invention, the cooling water does not freeze even when the temperature falls below freezing in winter.

According to the fifth aspect of the present invention, the heat quantity of the sensible heat due to the temperature change of the cooling water and the heat quantity of the latent heat due to the phase change of the latent heat storage agent are deprived of the object to be cooled, and the cooling exchanger Heat is dissipated at (15).

Further, in the invention according to claim 6, the heat exchanger
(11) is connected to a refrigeration circuit (41) of a refrigeration cycle such as a vapor compression type or an absorption type, and cools a working fluid such as a refrigerant or an absorbing solution with cooling water.

According to the present invention, the amount of heat of the sensible heat due to the temperature change of the cooling water and the amount of heat of the latent heat due to the phase change of the latent heat storage agent are deprived of the working fluid such as the refrigerant and the absorbing solution. The heat is radiated by the cooling exchanger (15).

Further, in the invention according to claim 8, the cooling water circuit (10) and the refrigeration circuit (41) are connected in advance by pipes and are integrally formed.

According to the ninth aspect of the present invention, the cooling water cooled by the cooling exchanger (15) flows to the air heat exchanger (50), and the cooling water and the room are cooled by the air heat exchanger (50). Heat exchanges with the air to cool the room air.

According to the tenth aspect of the present invention, the cooling water whose temperature has increased by cooling the room air in the air heat exchanger (50) flows to the cooling exchanger (15) and is cooled. At this time, while the amount of heat of the sensible heat of the cooling water is radiated and the temperature of the cooling water drops, when the temperature of the cooling water becomes near the dew point temperature of the indoor air, which is the melting point of the latent heat storage agent, the phase change of the latent heat storage agent The amount of heat of the latent heat is radiated, and the temperature of the cooling water is maintained near the dew point temperature of the room air.

According to the eleventh aspect of the present invention, the cooling water is cooled by evaporating a part of the cooling water in the cooling exchanger (15), and also by the cold generated by the auxiliary refrigerator (60). The cooling water is cooled, and the cooled air and the room air exchange heat with the air heat exchanger (50), thereby cooling the room air.

In the twelfth aspect of the present invention, the first cooling operation for cooling the indoor air by the cooling water cooled by the cooling exchanger (15) and the cooling by the cold generated by the refrigeration circuit (41). The second cooling operation in which the room air is cooled by the cooled water is switched to cool the room air.

[0033]

Therefore, according to the first aspect of the present invention,
Since the cooling water and the air do not come into direct contact with each other, gas and dirt in the air do not mix with the cooling water, so that the contamination of the cooling water can be prevented. In addition, since a part of the cooling water evaporates and is released into the air, the same cooling performance as when the cooling water and the air are directly contacted can be obtained. As a result,
High cooling performance can be maintained.

According to the second aspect of the present invention, the object to be cooled can be cooled by the cooling water cooled by the cooling exchanger (15). In addition, cooling exchanger (15)
The cooling water, which has been reduced because a part of the cooling water evaporated in the above is discharged into the air, is supplied to the cooling water circuit (10) by the water supply means (30), and the water in the cooling water circuit (10) is The amount of cooling water can be kept constant.

According to the third aspect of the present invention, only water containing no impurities which has passed through the reverse osmosis membrane (33) can be supplied into the cooling water circuit (10), and contamination of the cooling water can be reduced. It can be reliably prevented.

According to the fourth aspect of the present invention, it is possible to prevent the cooling water from freezing even when the temperature falls below freezing in winter. For this reason, conventionally, a drainage operation is required to prevent breakage of the device due to freezing in the circuit, but according to the present invention, the drainage operation is not required, and the maintenance operation is simplified.

According to the fifth aspect of the invention, the heat quantity of the sensible heat component due to the temperature change of the cooling water and the heat quantity of the latent heat component due to the phase change of the latent heat storage agent can be removed from the object to be cooled. Thus, more heat can be taken from the object to be cooled than in the case of using only cooling water. In addition, when the amount of heat taken from the object to be cooled is constant, the amount of circulation of the cooling water can be reduced, and the power required for circulation of the cooling water can be reduced. Further, since the latent heat storage agent is covered with the coating material and is configured as a microcapsule, it is easy to select a substance that can be used as the latent heat storage agent.

According to the sixth aspect of the present invention, the exhaust heat from the refrigeration circuit (41) can be removed by the cooling water cooled by the cooling exchanger (15). ) Operation can be performed reliably.

According to the seventh aspect of the present invention, the refrigeration circuit (41) has an amount of heat corresponding to the amount of heat of the sensible heat due to the temperature change of the cooling water and the amount of heat of the latent heat due to the phase change of the latent heat storage agent. Heat can be processed and compared to the case of only cooling water,
More waste heat can be processed. Further, when the amount of heat exhausted from the refrigeration circuit (41) to be processed is constant, the amount of circulation of the cooling water can be reduced, and the power required for circulation of the cooling water can be reduced. Further, since the latent heat storage agent is covered with the coating material and is configured as a microcapsule, it is easy to select a substance that can be used as the latent heat storage agent.

According to the eighth aspect of the present invention, since the cooling water circuit (10) and the refrigeration circuit (41) are previously formed integrally by connecting pipes and the like, piping work at the installation location is performed. Can be simplified, and man-hours for installation work can be reduced.

According to the ninth aspect of the present invention, the indoor air can be cooled by the cooling water cooled by the cooling exchanger (15). In other words, when cooling a room that needs to be cooled for a year because equipment that generates heat is installed in the room, the cooling water circulating through the cooling water circuit (10) in the middle and winter seasons Indoor cooling can be performed only by using the air conditioner. As a result, energy required for cooling can be reduced as compared with a case where cooling is performed by an air conditioner included in a refrigeration cycle.

According to the tenth aspect, the temperature of the cooling water at the inlet of the heat exchanger (11) can be maintained near the dew point of the room air. As a result, the circulation passage (13) of the cooling water circuit (10) in which the cooling water flows is in contact with the room air, and dew condensation on the pipe surface of the circulation passage (13) can be reliably prevented. . Also, since the amount of heat of the latent heat due to the phase change of the heat storage agent can be removed from the indoor air, even when the cooling water temperature is maintained near the dew point temperature of the indoor air, the amount of heat removed from the indoor air does not decrease. Indoor cooling can be performed. Further, since the latent heat storage agent is covered with the coating material and is configured as a microcapsule, it is easy to select a substance that can be used as the latent heat storage agent.

According to the eleventh aspect of the present invention, the cooling water is not only cooled by the evaporation of the cooling water in the cooling exchanger (15), but also by the cold generated by the auxiliary refrigerator (60). Therefore, the temperature of the cooling water can be kept low even in the summer season, and the indoor air can be reliably cooled.

According to the twelfth aspect of the present invention, the first cooling operation for cooling the indoor air with the cooling water cooled by the cooling exchanger (15) and the cooling generated by the refrigeration circuit (41) are performed. The second cooling operation in which the room air is cooled by the cooled cooling water can be switched and performed. In other words, when cooling a room that needs cooling over the year because equipment and the like that generate heat are installed in the room, the second cooling operation can be performed in the summer, while the second cooling operation can be performed in the middle and winter. Can perform the first cooling operation, and as a result, the energy required for cooling can be reduced as compared with the case where cooling is performed by an air conditioner having a refrigeration cycle over a year.

[0045]

Embodiment 1 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a cooling device (1) according to the present embodiment comprises a cooling water circuit (10), a water supply section (30), and a refrigerator.
(40), wherein the cooling water is used to cool the heat radiation of the refrigerator (40). The cooling water circuit (10) includes a cooling exchanger (15) and a heat exchanger (1) provided in the cooling tower section (20).
Water pipe (13) in which 1) and pump (12) are in order a circulation passage
The closed circuit is connected to the cooling water and is configured so that cooling water circulates inside. In addition, cooling water circuit (10)
The heat exchanger (11) is connected to a refrigerator (40) having a refrigeration circuit (41) constituting a vapor compression refrigeration cycle, and radiates heat from the refrigerator (40) to a cooling water circuit. The cooling water is taken away by the cooling water of (10), and the heat taken from the refrigerator (40) is radiated by the cooling exchanger (15).

As shown in FIG. 2, the cooling tower section (20) houses a fan (25) to which a fan motor (26) is connected and a cooling exchanger (15) in a casing (21). It is configured. The casing (21) is formed in a rectangular parallelepiped, and has an air inlet (22) through which air flows in a lower side surface,
An air outlet (23) through which air flows out is provided on the upper end surface, and an air passage (24) communicating from the air inlet (22) to the air outlet (23) is formed inside the casing (21). ing. In the air passage (24), a cooling exchanger (15) is provided over substantially the entire cross section, and the cooling exchanger (1) is provided.
A fan (25) is provided between 5) and the air outlet (23).

The cooling exchanger (15) is a feature of the present invention, and is formed by forming a moisture-permeable membrane (5), which is permeable to water vapor and prevents water from permeating, into a straight tubular shape. It comprises a plurality of cooling pipes (16) and two headers (17a, 17b) provided at both left and right ends of the cooling exchanger (15).

The cooling pipe (16) is configured so that the cooling water flows and the cooling water comes into contact with the air in the air passage (24) through the moisture permeable membrane (5). The cooling pipe (16) is configured such that a part of the cooling water evaporates and the cooling water is cooled by the latent heat of evaporation. Also,
The cooling pipes (16) are arranged in a plurality of stages in the vertical direction, and are arranged in a plurality of rows in the depth direction. Both ends of each cooling pipe (16) are connected to the two headers (17a, 17b). ).

One of the two headers (17a, 17b) is provided at its upper end with an inlet (18a) to which a water pipe (13) of a cooling water circuit (10) is connected and into which cooling water flows. At the lower end, a water pipe (13) of a cooling water circuit (10) is connected, and an outlet (18b) through which cooling water flows out is provided. The first header (17a)
While the other is configured as a second header (17b). Also, both headers (17a, 17b) have partition plates (19) for regulating the flow of cooling water in the vertical direction inside the headers.
The cooling water flowing from the inlet (18a) flows in each stage from the upper stage to the lower stage of the arranged cooling pipes (16) in order, and flows out from the outlet (18b). I have. In addition, the path taking as the flow path of the fluid in the pipes of the tube group such as the plurality of cooling pipes is not limited to the above, and various paths can be taken depending on the design.

The water supply section (30) is connected between the heat exchanger (11) of the cooling water circuit (10) and the pump (12),
Equipped with a reverse osmosis membrane module (32) having a reverse osmosis membrane (33) permeable to water and a pressure pump (31), receives water from tap water as raw water, and contains impurities from raw water mixed with impurities. This is configured as a water supply unit that generates no treated water and supplies the treated water to the cooling water circuit (10).

The pressurizing pump (31) is configured to increase the pressure by pressurizing raw water received from a water supply or the like, and to supply the raw water having the increased pressure to the reverse osmosis membrane module (32).

As shown in FIG. 3, the reverse osmosis membrane module (32) has a cylindrical outer cylinder (34) and an inner cylinder (37) having a reverse osmosis membrane (33) formed in a cylindrical shape. While the inner cylinder
The end (37) is closed at one end and provided coaxially with the outer cylinder (34) in the internal space of the outer cylinder (34). Also, the outer cylinder
In (34), the raw water pressurized by the pressurizing pump (31) is
A raw water inlet (35) for introducing into the interior of (4) and a wastewater outlet (36) for discharging the remaining wastewater generated from the raw water to the outside of the outer cylinder (34), while the inner cylinder (37) ) Is formed at a treated water outlet (38) for sending treated water to a cooling water circuit (10).

The refrigerating circuit (41) of the refrigerating machine (40) comprises a compressor (42), a heat exchanger (11) of a cooling water circuit (10), and an expansion valve (4).
3) and an evaporator (44) are connected in order by a refrigerant pipe (46) to a refrigerant circuit (41). The refrigerant circuit is filled with the refrigerant, and the refrigerant circulates through the refrigerant circuit (41) to form a refrigeration cycle. Is composed. The heat exchanger (11) of the cooling water circuit (10) is constituted by a condenser (45) that cools and condenses the refrigerant in the refrigerant circuit (41) with the cooling water, and dissipates the heat of the refrigerator (40). Cooling treatment with cooling water.

-Operating operation- First, in the cooling water circuit (10), the cooling water circulating in the cooling water circuit (10) is supplied to the heat exchanger (45) of the condenser (45) of the refrigerant circuit (41). To the refrigerant circuit (4).
The heat of condensation generated when the refrigerant of (1) is condensed is deprived, and then flows to the cooling exchanger (15) provided in the cooling tower (20). In the cooling exchanger (15), the cooling water from the heat exchanger (11) and the air flowing through the air passage (24) of the cooling tower (20) are subjected to moisture permeability forming a cooling pipe (16). Since the contact is made through the membrane (5), the cooling water does not come into direct contact with the cooling water, and a part of the cooling water evaporates and passes through the moisture-permeable membrane (5) and is released into the air. You. As a result, the heat of the steam is released, and the cooling water is cooled in the cooling exchanger (15). Then, the cooled cooling water flows through the water pipe (13) again, reaches the heat exchanger (11), and repeats this circulation.

Next, in the water supply section (30), the raw water supplied from the water supply or the like is supplied to the reverse osmosis membrane module (32) after being pressurized by the pressurizing pump (31). And
Since the raw water is pressurized, only the water overcomes the osmotic pressure caused by the difference in the concentration of impurities contained in the raw water and the treated water with the reverse osmosis membrane (33) interposed, and only the water passes through the reverse osmosis membrane (33). By permeation, treated water containing no impurities is generated,
The treated water is supplied to a cooling water circuit (10).

Next, in the refrigerant circuit (41) of the refrigerator (40),
The high-temperature and high-pressure gas refrigerant discharged from the compressor (42) flows to the heat exchanger (11) of the cooling water circuit (10), which is a condenser (45), and is cooled by the cooling water of the cooling water circuit (10). Be condensed. Thereafter, the pressure is reduced by the expansion valve (43) to become a low-pressure liquid refrigerant.The low-pressure liquid refrigerant evaporates in the evaporator (44) to generate cold heat, is then sucked into the compressor (42) and repeats this circulation. . Then, the cold generated by the evaporator (44) is used for air conditioning, cooling of an object, and the like.

-Effects of First Embodiment- According to the first embodiment, the following effects are exhibited.

First, since the cooling water and the air do not come into direct contact with each other, the gas and dirt in the air do not enter the cooling water, so that the contamination of the cooling water can be prevented. In addition, since a part of the cooling water evaporates and is released into the air, the same cooling performance as in the case where the cooling water and the air are directly contacted can be obtained, and as a result, the cooling performance is maintained at a high level. be able to.

Further, since treated water containing no impurities permeated through the reverse osmosis membrane (33) is supplied into the cooling water circuit (10), contamination of the cooling water can be prevented more reliably.

Further, since the cooling water can be prevented from being contaminated, it is possible to prevent the corrosion of the piping and the inside of the heat exchanger (11), and to prevent the cooling performance from being deteriorated even after long-term use. it can.

-Modification 1 of Embodiment 1 In Embodiment 1 described above, the refrigerant circuit (41) of the vapor compression refrigeration cycle is connected to the heat exchanger (11) of the cooling water circuit (10). Replace the exchanger (11) with the condenser (45) in the refrigerant circuit (41)
However, instead of this, the cooling water circuit (1
The refrigeration circuit of the absorption refrigeration cycle is connected to the heat exchanger (11) of (0), and the heat exchanger (11) is configured as an absorber and a condenser (45) of the refrigeration circuit (41). You may.

In the modification of the first embodiment,
The cooling water circuit (10) and the refrigeration circuit of the absorption refrigeration cycle may be connected in advance by piping and housed in the casing (21) to be integrally formed.

According to this, it is possible to simplify the piping work at the installation place when installing the apparatus, and it is possible to reduce the man-hour required for the installation work.

-Modification 2 of Embodiment 1 As another modification, the melting point is higher than the cooling water temperature at the outlet of the cooling exchanger (15), and the melting point is at the outlet of the heat exchanger (11). A large number of microcapsules in which a latent heat storage agent, which is a substance having a temperature lower than the cooling water temperature of the above, is covered with the coating material may be mixed into the cooling water. Specifically, the temperature of the exhaust heat from the refrigerator (40) is about 40 ° C. to 50 ° C., whereas the temperature of the cooling water at the outlet of the cooling exchanger (15) is about 30 ° C. The melting point of the latent heat storage agent in the present modification may be in the range of approximately 30 ° C. to 35 ° C. For example, substances shown in Table 1 can be used as the latent heat storage agent.

According to this, the amount of heat corresponding to the sensible heat due to the change in the temperature of the cooling water and the amount of heat corresponding to the latent heat due to the phase change of the latent heat storage agent are transferred to the room air or the refrigerant circuit (41). ), The amount of cooling water circulated can be reduced as compared with the case of using only cooling water, and the power required for circulating cooling water can be reduced.

[0067]

[Table 1]

[0068]

Embodiment 2 of the present invention is different from Embodiment 1 in that a refrigerator (40) is connected to the cooling water circuit (10), as shown in FIG. The heat exchanger (11) of the water circuit (10) is configured as an air heat exchanger (50), and the cooling water circuit
The room air is cooled by the cooling water of (10) to cool the room.

The air heat exchanger (50) is a so-called cross-fin type heat exchanger in which a number of heat transfer tubes and a number of plate-like fins are integrally formed. Together with the casing to form an indoor unit.

Other cooling water circuit (10) and water supply section (30)
Is similar to that of the first embodiment.

-Operating operation- First, in the cooling water circuit (10), the cooling water circulating in the cooling water circuit (10) flows to the air heat exchanger (50), and the cooling water flows through the air heat exchanger (50). The indoor air is cooled by performing heat exchange with the indoor air, and then flows to the cooling exchanger (15) provided in the cooling tower (20). The cooling exchanger (15) operates similarly to the cooling exchanger (15) of the first embodiment, and cools the cooling water. Then, the cooled cooling water flows through the water pipe (13) again, reaches the air heat exchanger (50), and repeats this circulation.

The operation of the water supply section (30) is described in the first embodiment.
The same as the water supply section (30).

According to the second embodiment, the indoor air can be cooled by the cooling water cooled by the cooling exchanger (15). In other words, when cooling a room that needs to be cooled for a year because equipment that generates heat is installed in the room, the cooling water circulating through the cooling water circuit (10) in the middle and winter seasons Indoor cooling can be performed only by using the air conditioner. As a result, energy required for cooling can be reduced as compared with a case where cooling is performed by an air conditioner having a refrigeration cycle.

[0074]

Embodiment 3 As shown in FIG. 5, in Embodiment 3 of the present invention, in addition to the structure of Embodiment 2, an auxiliary refrigerator (60) constituting a vapor compression refrigeration cycle is provided. Things.

That is, the cooling device (1) is provided with the auxiliary refrigerator (6).
The cooling water generated in step (0) cools the cooling water in the cooling water circuit (10), and switches between air conditioning operation without using the auxiliary refrigerator (60) and air conditioning operation using the auxiliary refrigerator (60). It is configured to be performed.

The auxiliary refrigerator (60) comprises an auxiliary refrigerator (42) in which a compressor (42), a condenser (45), an expansion valve (43), and an evaporator (44) are connected in order by a refrigerant pipe (46). Circuit (61). The auxiliary refrigeration circuit (61) is filled with a refrigerant, and the refrigerant circulates through the auxiliary refrigeration circuit (61) to constitute a vapor compression refrigeration cycle. The condenser (45) is configured to condense the refrigerant by exchanging heat between air and the refrigerant, while the evaporator (44) is disposed in the cooling water circuit (10).
It is connected between 5) and the air heat exchanger (50), and is configured to cool the cooling water by heat exchange between the cooling water and the refrigerant.

The other structure is the same as that of the second embodiment.

-Operating operation- First, the operation during the air conditioning operation without using the auxiliary refrigerator (60) is the same as the operation of the cooling water circuit (10) of the second embodiment.

Next, during the air conditioning operation using the auxiliary refrigerator (60), in the auxiliary refrigerator (60), the high-temperature and high-pressure gas refrigerant discharged from the compressor (42) is supplied to the condenser (45). flow,
The refrigerant is condensed by heat exchange between the air and the refrigerant. The liquid refrigerant is reduced in pressure by the expansion valve (43) to become a low-pressure liquid refrigerant, and the low-pressure liquid refrigerant evaporates by heat exchange with the cooling water in the evaporator (44) to cool the cooling water. Then the evaporator (4
The refrigerant evaporated in 4) is sucked into the compressor (42) and repeats this circulation.

On the other hand, in the cooling water circuit (10), the cooling water that has cooled the room air in the air heat exchanger (50) is supplied to the cooling exchanger (1).
Step 5) is the same as that of the second embodiment up to the point where cooling is performed. And in the present embodiment, the cooling exchanger (15)
The cooling water cooled in the evaporator (44) of the auxiliary refrigerator (60)
After further cooling, the air flows to the air heat exchanger (50) to repeat this circulation.

The water supply section (30) during both air conditioning operations
Is the same as that of the water supply section (30) of the first embodiment.

According to the third embodiment, the same effects as those of the second embodiment can be obtained, and the cooling water is cooled by evaporation of the cooling water in the cooling exchanger (15). As well as an auxiliary refrigerator (6
0), the temperature of the cooling water can be kept low even in the summer, and the room air can be reliably cooled.

-Modification of Embodiment 3-In Embodiment 3 described above, a number of microcapsules in which a latent heat storage agent whose melting point is near the dew point of room air is covered with a coating material are mixed with cooling water. You may do so. Specifically, the dew point temperature of the indoor air is 10 ° C to 20 ° C.
Therefore, the melting point of the latent heat storage agent of the present modified example may be within the above-mentioned temperature range. For example, substances shown in Table 2 can be used as the latent heat storage agent.

According to this, the temperature of the cooling water at the inlet of the air heat exchanger (50) can be maintained near the dew point of the room air. As a result, the water pipe (1
3) comes into contact with the room air, and dew condensation on the surface of the water pipe (13) can be reliably prevented. Also, since the amount of heat of the latent heat due to the phase change of the heat storage agent can be removed from the indoor air, even when the cooling water temperature is maintained near the dew point temperature of the indoor air, the amount of heat removed from the indoor air does not decrease. Indoor cooling can be performed.

[0085]

[Table 2]

[0086]

Fourth Embodiment A fourth embodiment of the present invention includes a refrigerator (40) constituting a vapor compression refrigeration cycle in addition to the configuration of the second embodiment as shown in FIG. is there.

That is, the cooling device (1) is connected to the cooling heat exchanger (5).
6) The evaporator (44) of the refrigerator (40) and the radiator heat exchanger (5
The condenser (45) of the refrigerator (40) is connected to the cooling water circuit (10) in parallel with the air heat exchanger (50).
A first cooling operation without using the refrigerator (40);
The first cooling operation can be switched to the second cooling operation using
Fourth valves (SV-1 to SV-4) and an auxiliary pump (70) are provided in the cooling water circuit (10).

The first valve (SV-1) is a cooling exchanger.
The third valve (SV-3) is provided in the water pipe (13) between the air heat exchanger (50) and the air heat exchanger (50).
A water pipe (13) is provided between the water supply section (30) and the water supply section (30).

The refrigerator (40) includes a compressor (42) and a condenser.
(45), expansion valve (43) and evaporator (44)
The refrigerant circuit (41) is connected to the refrigerant circuit (41).
1) to form a vapor compression refrigeration cycle.

One end of the condenser (45) is connected to a fourth valve (SV
-4) is connected between the cooling exchanger (15) and the third valve (SV-3), and the other end is connected to the first valve (SV-1) and the pump (1).
2) is connected between In addition, the evaporator (44)
Is connected to the third valve (SV-3) at one end via an auxiliary pump (70).
And the other end is connected between the air heat exchanger (50) and the first valve (SV-2) via a second valve (SV-2).
V-1).

The other structure is the same as that of the first embodiment.

-Operation- First, the operation at the time of the first cooling operation without using the refrigerator (40) will be described. The first valve (SV-1) and the third valve
(SV-3) is opened, and the second valve (SV-2) and the fourth valve (SV-4) are closed. In this state, the cooling water is circulated by operating the pump (12) and operates in the same manner as in the second embodiment to cool the room air and perform the cooling operation.

Next, the operation during the second cooling operation using the refrigerator (40) will be described. The first valve (SV-1) and the third valve (SV-3) are closed and the second valve (SV-3) is closed. SV-
2) Open the fourth valve (SV-4). In this state, the pump (12) is operated and the cooling exchanger (15) and condenser
(45) and the auxiliary pump (70) is operated to circulate the cooling water between the air heat exchanger (50) and the evaporator (44). Drive (40).

In the refrigerator (40), the high-temperature and high-pressure gas refrigerant discharged from the compressor (42) flows to the condenser (45),
It condenses by heat exchange with the cooling water circulating between the cooling exchanger (15) and the condenser (45). This liquid refrigerant is supplied to the expansion valve
In (43), the pressure is reduced to a low-pressure liquid refrigerant, and this low-pressure liquid refrigerant is evaporated in an evaporator (44), and an air heat exchanger (50)
Evaporates by heat exchange with cooling water circulating between the cooling water and the cooling water. Thereafter, the refrigerant evaporated in the evaporator (44) is sucked into the compressor (42) and repeats this circulation.

The operation of the closed circuit formed by the cooling exchanger (15), the condenser (45) and the pump (12) is described in the first embodiment.
This is the same as the operation of the cooling water circuit (10). In other words, the cooling water whose temperature has risen by removing the condensation heat generated when the refrigerant condenses flows to the cooling exchanger (15), is cooled, flows again to the condenser (45), and repeats this circulation.

The operation of the closed circuit formed by the air heat exchanger (50), the evaporator (44) and the auxiliary pump (70) will be described. The heat exchange with the indoor air by the air heat exchanger (50) will be described. The cooling water subjected to the above flows to the evaporator (44). Then, the cooling water is cooled by heat exchange between the refrigerant evaporated in the evaporator (44) and the cooling water, and the cooled cooling water flows to the air heat exchanger (50) to repeat the circulation. .

The operation of the water supply section (30) is described in the first embodiment.
The same as the water supply section (30).

-Effect of Embodiment 4- According to Embodiment 4, the first cooling operation for cooling the indoor air with the cooling water cooled by the cooling exchanger (15),
The second cooling operation in which room air is cooled by cooling water cooled by cold generated in the refrigerant circuit (41) can be switched and performed. In other words, when cooling a room that needs cooling over the year because equipment and the like that generate heat are installed in the room, the second cooling operation can be performed in the summer, while the second cooling operation can be performed in the middle and winter. Can perform the first cooling operation, and as a result, the energy required for cooling can be reduced as compared with the case where cooling is performed by an air conditioner having a refrigeration cycle over a year.

-Modification of Embodiment 4- In Embodiment 4 described above, a refrigerator (40) constituting a vapor compression refrigeration cycle is provided in addition to the configuration of Embodiment 2, but instead of this, Thus, a refrigerator constituting an absorption refrigeration cycle may be provided. In this case, an absorber and a condenser are connected as a heat radiation heat exchanger (55) to the cooling water circuit (10), and the evaporator is connected to the cooling heat exchanger (5).
6) Connect as.

[0100]

Other Embodiments In the present invention, the antifreeze liquid according to the first to fourth embodiments may be constituted by mixing a substance such as ethylene glycol into the cooling water circulating in the cooling water circuit (10). .

According to this, even if the temperature falls below freezing in winter, the cooling water can be prevented from freezing, and the draining work which was conventionally required becomes unnecessary, and the maintenance work of the cooling device is simplified. Is done.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a configuration of a cooling device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a configuration of a cooling tower unit according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing a configuration of a reverse osmosis membrane module according to Embodiment 1 of the present invention.

FIG. 4 is an explanatory diagram showing a configuration of a cooling device according to Embodiment 2 of the present invention.

FIG. 5 is an explanatory diagram illustrating a configuration of a cooling device according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a configuration of a cooling device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 (5) Moisture permeable membrane (10) Cooling water circuit (11) Heat exchanger (12) Pump (13) Water pipe (circulation passage) (15) Cooling exchanger (30) Water supply unit (water supply means) (33) Reverse osmosis membrane (41) Refrigerant circuit (refrigeration circuit) (50) Air heat exchanger (55) Radiation heat exchanger (56) Cooling heat exchanger (60) Auxiliary refrigerator

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Manabu Yoshimi 1304 Kanaokacho, Sakai City, Osaka Daikin Industries Inside Kanaoka Plant of Sakai Seisakusho Co., Ltd. (72) Inventor Kazuo Yonemoto 1304 Kanaokacho, Sakai City, Osaka Daikin Industries Sakai Plant Kanaoka Factory

Claims (12)

[Claims] 1. A cooling exchanger in a cooling water circulation passage (13).
The cooling exchanger (15) is provided for bringing cooling water into contact with the outside air through a moisture permeable membrane (5) that allows water vapor to pass therethrough and prevents water from permeating. A cooling device configured to evaporate a part of the cooling water to release steam to the outside air to cool the cooling water. 2. The cooling device according to claim 1, wherein the cooling exchanger (15) includes a heat exchanger (11) configured to cool an object to be cooled by cooling water, and a pump (12).
Are provided in a closed circuit cooling water circuit (10), which is connected in order by a circulation passage (13) .The cooling water circuit (10) has a water supply means (10) for supplying water to the cooling water circuit (10). 30) A cooling device, characterized in that the cooling device is connected thereto. 3. The cooling device according to claim 2, wherein the water supply means (30) includes a reverse osmosis membrane (33) permeable to water,
A cooling device characterized in that water permeated through the reverse osmosis membrane (33) is supplied into a cooling water circuit (10). 4. The cooling device according to claim 2, wherein the cooling water is mixed with a substance that lowers the freezing point of the cooling water to form an antifreeze. 5. The cooling device according to claim 2, wherein a plurality of microcapsules in which the latent heat storage agent is covered with the coating material are mixed in the cooling water. Cooling system. 6. The cooling device according to claim 2, wherein the heat exchanger (11) includes a refrigeration circuit (4) that forms a refrigeration cycle.
1) Refrigeration circuit connected to and cooling water is the object to be cooled
A cooling device configured to cool the working fluid of (41). 7. The cooling device according to claim 6, wherein the cooling water contains a plurality of microcapsules in which a latent heat storage agent is covered with a coating material, while the latent heat storage agent has a melting point exchangeable for cooling. A cooling device comprising a substance having a temperature higher than the cooling water temperature at the outlet of the heat exchanger (15) and lower than the cooling water temperature at the outlet of the heat exchanger (11). 8. The cooling device according to claim 6, wherein the cooling water circuit (10) and the refrigeration circuit (41) are housed in a casing and formed integrally. . 9. The cooling device according to claim 2, wherein the heat exchanger (11) of the cooling water circuit (10) is an air heat exchanger (50).
And a cooling device configured to cool room air, which is an object to be cooled, with cooling water. 10. The cooling device according to claim 2, wherein the heat exchanger (11) of the cooling water circuit (10) is an air heat exchanger (50).
The cooling water is used to cool room air, which is an object to be cooled, and the cooling water is mixed with a large number of microcapsules having a latent heat storage agent covered with a coating material. A cooling device, wherein the heat storage agent is formed of a substance having a melting point near the dew point of room air. 11. The cooling device according to claim 9, further comprising an auxiliary refrigerator configured to generate cold heat and to cool the cooling water in the cooling water circuit by the cold heat. A cooling device. 12. The cooling device according to claim 2, wherein the heat exchanger (11) of the cooling water circuit (10) is a heat radiation heat exchanger (55).
And an air heat exchanger (5
The cooling water circuit (10) is connected to a cooling heat exchanger (56), while the radiating heat exchanger (55) and the cooling heat exchanger (56) are connected to a refrigeration cycle. Is connected to the refrigeration circuit (41), and the radiator heat exchanger (55)
(41), and the cooling heat exchanger (56) is configured to cool the cooling water with cold generated in the refrigeration circuit (41). A first cooling operation in which cooling water is circulated between the cooling heat exchanger (50) and the cooling air exchanger (15) to cool the indoor air; and a heat exchange heat exchanger (55) and the cooling heat exchanger (15). At the same time, the cooling water circulates to radiate the working fluid of the refrigeration circuit (41), and at the same time, the cooling heat exchanger (56) and the air heat exchanger (50)
The cooling water circulates between the cooling water and the cooling water generated by the refrigeration circuit (41).
A cooling device configured to be switchable between cooling operation and cooling operation.