JP2008032241A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device having low operating cost while maintaining high heat exchanging efficiency over a long period. <P>SOLUTION: A cooling water pump device 41 is used for recirculating cooling water flowing out of an open type cooling tower 1 via a refrigerator 46 into the open type cooling tower 1 to circulate the cooling water between the open type cooling tower 1 and the refrigerator 46. The flow amount of the cooling water to be circulated is controlled by an inverter for the cooling water pump device 41. A submerged pump type micro/nano babble generator 12 is arranged so that the cooling water to be circulated contains micro/nano babbles. In accordance with a signal from the cooling water pump device 41, the amount of the micro/nano babbles generated by the micro/nano babble generator 12 is controlled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooling device for cooling a substance. In particular, the present invention relates to a cooling device that includes a cooling tower and a refrigerator, and uses microbubble-containing cooling water containing micro-nano bubbles as cooling water.

  Conventionally, as a cooling apparatus for cooling a substance, there is an apparatus having a cooling tower and a cooler used in various industrial fields.

  There are two types of cooling towers, round and square, which are a type of heat exchanger that cools water or other heat medium directly or indirectly in contact with the atmosphere, and is installed outdoors. ing. Here, since the cooling tower is installed outdoors, the cooling water is often at a temperature suitable for the growth of microorganisms such as bacteria and amoeba, and an environment where Legionella spp. It is in. For this reason, it is necessary to control the water quality of the cooling water in the cooling tower so that the human body is not affected even if aerosol (fine liquid or solid particles) is scattered in the air from the cooling tower. For this reason, during the period of use of the cooling tower, in order to suppress the growth of Legionella spp., It is common to add a bactericidal agent continuously. in use.

  Here, in order to maintain the effect of washing and sterilization, water treatment may be performed. If the cooling water is concentrated too much, scale, slime or corrosion occurs in the cooling device, and the effect of cleaning and sterilization is rapidly reduced. As a countermeasure against this, forcibly blowing cooling water and replenishing water is carried out to suppress concentration. In general, scale, slime, and corrosion-preventing chemicals are introduced at an appropriate concentration to suppress the occurrence of scale, slime, or corrosion.

  On the other hand, the refrigerator is a heat source facility having a heat exchange part, and is also called a heat pump. The refrigerator moves heat from a low temperature part to a high temperature part in order to lower the temperature. When the refrigerator is used and operated for a long period of time, a scale is generated in the heat exchange portion, and the heat exchange efficiency is lowered. For this reason, it is indispensable to perform maintenance work such as cleaning and disassembly of the heat exchange part.

  By the way, conventionally, as a method of using nanobubbles and a device using nanobubbles, there is one described in Japanese Patent Application Laid-Open No. 2004-121962.

  This method and apparatus has the following functions and effects of nanobubbles, i.e., reduced buoyancy, increased surface area, increased surface activity, generation of local high-pressure field, and surface active action and bactericidal action by realizing electrostatic polarization, etc. It makes use of the characteristics of The above publication can improve the adsorption function of the dirt component, the high-speed cleaning function and the sterilization function of the object surface by the synergistic effect of the plurality of functions and effects, and makes various objects highly functional and low environmental load. It is possible to clean the polluted water.

  Conventionally, as a method using other nanobubbles, there is a method for generating nanobubbles described in Japanese Patent Application Laid-Open No. 2003-334548 (Patent Document 2).

  This method includes a step of decomposing and gasifying a part of the liquid in the liquid and a step of applying ultrasonic waves in the liquid, or a step of decomposing and gasifying a part of the liquid, A step of decomposing and gasifying the part and a step of applying ultrasonic waves. The above publication discloses that nanobubbles can be generated efficiently by using this method.

  Conventionally, as an apparatus using further nanobubbles, there is a waste liquid processing apparatus using ozone microbubbles described in Japanese Patent Application Laid-Open No. 2004-321959 (Patent Document 3).

  This device supplies ozone gas generated by the ozone generator and waste liquid to the microbubble generator. The waste liquid is extracted from the lower part of the treatment layer and supplied to the microbubble generator via a pressure pump. Further, the generated ozone microbubbles are passed through the waste liquid in the treatment tank through the opening of the gas blowing pipe.

  However, as is clear from the fact that the three publications mentioned nothing about the relationship between the cooling device and the micro / nano bubbles, it is possible to introduce the micro / nano bubbles into the cooling device. It is unclear whether or not a good effect can be obtained if it can be introduced into the device (for example, there is no possibility of adverse effects such as bacterial growth and contamination of cooling water by micro-nano bubbles. It cannot be said).

As described above, in the conventional cooling device, if the cooling device is operated for a long time, the heat exchange efficiency of the refrigeration device is lowered, and the heat exchange efficiency of the cooling device is maintained at a high efficiency over a long period of time. In other words, good performance cannot be maintained for a long time, and energy saving cannot be achieved. Furthermore, in the cooling tower, in order to suppress the growth of microorganisms such as bacteria and amoeba, a large amount of scale, slime, and anti-corrosion agent must be used, and the operating cost (running cost) is high. Become. However, an effective technique for dealing with these problems is not known, and an effective technique for dealing with these problems is desired.
JP 2004-121962 A JP 2003-334548 A JP 2004-321959 A

  Therefore, an object of the present invention is to provide a cooling device that can maintain the efficiency of heat exchange with high efficiency over a long period of time and has low operating cost.

In order to solve the above-described problem, the cooling device of the present invention includes:
An open cooling tower,
A refrigerator into which cooling water cooled by the open cooling tower is introduced;
The open-type cooling tower and the refrigerator are provided between the open-type cooling tower and the refrigerator, and suck and discharge the cooling water and control the flow rate of the discharged cooling water. A cooling water pump device capable of controlling the flow rate of the cooling water that circulates
While generating micro-nano bubbles in the cooling water, comprising a micro-nano bubble generator having an adjustment unit for adjusting the generation amount of the micro-nano bubbles,
The cooling water pump device includes a signal output unit that outputs a signal representing a desired generation amount of the micro / nano bubbles corresponding to the discharge amount of the cooling water to the micro / nano bubble generator.

  Conventionally, in an open-type cooling tower, cooling water is contaminated with dust and pollutants in the atmosphere or concentrated due to evaporation, so that a certain amount of cooling water needs to be periodically replaced. Here, in an open cooling tower, algae and protozoa breed in cooling water to form a breeding environment for Legionella, and aerosol generated during heat exchange may become a source of Legionellosis infection.

  The present inventor has discovered that when micro-nano bubbles are contained in the cooling water, the cooling efficiency can be increased and the operating cost can be significantly reduced. In addition, the present inventor is able to improve the quality of the cooling water when the cooling water contains micro-nano bubbles, that is, even if the cooling water contains micro-nano bubbles, bacteria are contained in the cooling water. We discovered that the cooling water can be purified without breeding.

  According to the present invention, since micro-nano bubbles can be contained in the cooling water with the micro-nano bubble generator, algae and protozoa can be prevented from breeding in the cooling water, and a breeding environment for Legionella is formed. Can be prevented. Therefore, it can prevent that the aerosol generated at the time of heat exchange becomes an infection source of legionellosis.

  In addition, according to the present invention, since the amount of micro-nano bubbles generated is controlled based on a signal from the cooling water pump device, the amount of micro-nano bubbles generated is adjusted based on the flow rate of circulating cooling water. be able to. Therefore, the amount of micro / nano bubbles contained in the cooling water can be suppressed from becoming insufficient or excessive, the operation cost can be reduced, and scale and slime can be generated in the open cooling tower and the refrigerator. It can be surely prevented. Moreover, since the micro / nano bubbles are mixed in the cooling water, the heat exchange efficiency of the open cooling tower and the refrigerator can be increased efficiently.

  In one embodiment, the cooling water pump device controls the flow rate of the cooling water based on a signal from the refrigerator.

  According to the embodiment, since the cooling water pump device controls the flow rate of the cooling water based on a signal from the refrigerator, the cooling water is used when the refrigerating capacity of the refrigerator is insufficient. While the flow rate can be increased, when the refrigeration capacity of the refrigerator is excessive, the flow rate of the cooling water can be reduced. That is, the refrigeration capacity of the refrigerator can be always appropriate.

  Moreover, the cooling device of one Embodiment is a submersible pump type | mold micro nano bubble generator with which the said micro nano bubble generator was arrange | positioned outside or inside the said open type cooling tower.

  According to the embodiment, since the micro / nano bubble generator is a submersible pump type micro / nano bubble generator, the amount of micro / nano bubbles to be contained in the cooling water can be easily and accurately varied. Moreover, a large amount of micro / nano bubbles can be contained in the cooling water.

  Further, in the cooling device according to an embodiment, a submersible pump type micro / nano bubble generator is installed inside the open type cooling tower, and the micro / nano bubble generator is provided between the open type cooling tower and the refrigerator. Connected, the inside of the open type cooling tower is filled with a polyvinylidene chloride filler.

  Conventionally, a corrugated sheet made of vinyl chloride is generally used as a filler material connected to the inside of an open type cooling tower. However, the corrugated sheet made of vinyl chloride does not have sufficient water treatment capacity for organic substances in the cooling water. In addition, the conventional corrugated sheet made of vinyl chloride has a characteristic that a biofilm is formed to some extent, but sometimes the formed biofilm is peeled off to deteriorate the quality of the cooling water.

  In contrast, the present inventor has found that the polyvinylidene chloride filler can attach microorganisms for a long time and the microorganisms hardly peel off. Further, the present inventors have found that the micro-nano bubbles easily adhere to the polyvinylidene chloride filler, and that the cooling water is closer to the air and the heat exchange efficiency with the outside air before heat exchange can be improved.

  According to the above embodiment, since it has a submersible pump type micro-nano bubble generator and a micro-nano bubble generator, a wide variety of micro-nano bubbles (a wide range of bubble diameters in the cooling water, When bubbles of different diameters are of different types, there are many types of bubbles), and the performance such as purification performance and heat exchange performance can be significantly improved.

  Further, since the inside of the open type cooling tower is filled with fibrous polyvinylidene chloride packing, micro-nano bubbles can be attached to the polyvinylidene chloride packing, and the outside air as the air, cooling water and The heat exchange efficiency can be further improved.

  Moreover, since an appropriate amount of microorganisms can be propagated in the fibrous polyvinylidene chloride filler, the cooling water can be treated with microorganisms, and the quality of the cooling water can be improved.

  Moreover, the cooling device of one embodiment has a cooling tower water tank on the outflow side of the cooling water inside the open type cooling tower, an electric conductivity meter in the cooling tower water tank, and the submersible pump type. The adjusting unit of the micro / nano bubble generator is controlled based on a signal from the electric conductivity meter.

  According to the above embodiment, more micro-nano bubbles can be generated under conditions where micro-nano bubbles are likely to be generated, while reducing the amount of micro-nano bubbles generated when conditions are difficult to generate micro-nano bubbles. Can do. Therefore, the cooling device can be operated efficiently, and both the amount of micro / nano bubbles contained in the cooling water can be increased and the operation cost can be reduced.

  In one embodiment, the adjustment unit is a motor of the submersible pump type micro / nano bubble generator, and the number of revolutions of the motor is controlled based on a signal from the cooling water pump device. It has become.

  According to the above embodiment, when a large amount of cooling water is required, the cooling water containing a large amount of micro-nano bubbles can be supplied, and the heat exchange efficiency of the open type cooling tower and the refrigerator can be increased, and the open type cooling tower And the operating cost of the refrigerator can be reduced. Moreover, the operation of the submersible pump type micro / nano bubble generator can be adjusted to an appropriate one, and the operating cost of the submersible pump type micro / nano bubble generator can be reduced.

  Further, in the cooling device of one embodiment, the cooling water pump device and the micro-nano bubble generating device are sequentially connected from the open cooling tower side between the open cooling tower and the refrigerator. The amount of micro / nano bubbles generated by the nano bubble generator is controlled based on a signal from the cooling water pump device.

  According to the said embodiment, the micro nano bubble containing cooling water with a high content rate of micro nano bubble can be produced | generated in large quantities in a short time, and the heat exchange efficiency of a refrigerator can be improved.

  Further, in the cooling device of one embodiment, the open-type cooling tower is located under the watering storage tank, the watering storage tank, the intermediate part where the filler is disposed, and the intermediate part. The water spray storage tank and the cooling tower water tank are filled with a string-type polyvinylidene chloride filling.

  According to the above embodiment, the sprinkler storage tank and the cooling tower water tank are filled with the string-like polyvinylidene chloride filler having a fiber shape and a significantly large surface area. Nanobubbles can be attached. Therefore, the efficiency of heat exchange between the outside air as air and the cooling water can be improved.

  Further, in the cooling device of one embodiment, the open-type cooling tower is located under the watering storage tank, the watering storage tank, the intermediate part where the filler is disposed, and the intermediate part. The water spray storage tank and the cooling tower water tank are filled with a ring-type polyvinylidene chloride filler.

  According to the above embodiment, the ring-type polyvinylidene chloride filler is filled in the sprinkling storage tank and the cooling tower water tank with the fibrous and surface area having a significantly large surface area. Can be attached. Therefore, the efficiency of heat exchange between the outside air as air and the cooling water can be improved.

  Further, in the cooling device of one embodiment, the open-type cooling tower is located under the watering storage tank, the watering storage tank, the intermediate part where the filler is disposed, and the intermediate part. There is a cooling tower water tank, and a net bag containing activated carbon is arranged in the watering storage tank and the cooling tower water tank.

  According to the above embodiment, since the net bag containing activated carbon is arranged in the watering storage tank and the cooling tower water tank, the organic matter in the cooling water is adsorbed with activated carbon, and the activated carbon is adsorbed by microorganisms propagated on the activated carbon. It can decompose organic matter. In addition, this makes it possible to regenerate the activated carbon automatically, not artificially, and to perform a rational water treatment of the cooling water. Moreover, the quality of the cooling water can be remarkably improved by microbial decomposition, and the performance of the open cooling tower and the refrigerator can be improved.

  Moreover, the cooling device of one Embodiment is provided with the ozone generator connected to the said micro nano bubble generator.

  When the quality of the raw cooling water supplied to the cooling water is particularly bad, the generation of scale and slime is particularly increased in the open type cooling tower. According to the said embodiment, ozone micro nano bubble can be contained in cooling water, and cooling water can be strongly oxidized with ozone micro nano bubble. Therefore, generation of scale and slime in the open type cooling tower can be prevented. In addition, unlike ordinary ozone water, ozone micro-nano bubbles can exist in the cooling water for a long period of time, so that the oxidation action can be sustained for a long time, and the quality of the cooling water can be maintained for a long period of time. It can be in a good state.

  In addition, the cooling device according to an embodiment includes the cooling water from the open-type cooling tower, the filler tank filled with a string-type polyvinylidene chloride filler, and the cooling from the filler tank. Water is introduced and a micro / nano bubble generating tank in which a submersible pump type micro / nano bubble generator is arranged, and the cooling water from the micro / nano bubble generating tank is introduced into the open cooling tower. ing.

  According to the above-described embodiment, the organic matter in the cooling water can be decomposed and removed by microorganisms that are propagated in a large amount in the string-type polyvinylidene chloride filler in the filler tank and activated by micro-nano bubbles. it can. Therefore, the quality of the cooling water can be improved.

  In addition, the cooling device according to an embodiment includes the filler water filled with the ring-type polyvinylidene chloride filler, the cooling water from the open-type cooling tower, and the cooling water from the filler tank. And a micro / nano bubble generation tank in which a submersible pump type micro / nano bubble generator is disposed, and the cooling water from the micro / nano bubble generation tank is introduced into the open cooling tower. Yes.

  According to the above-described embodiment, organic substances in the cooling water can be decomposed and removed by microorganisms that are propagated in a large amount in the ring-type polyvinylidene chloride filler in the filler tank and activated by micro-nano bubbles. . Therefore, the quality of the cooling water can be improved.

  In addition, the cooling device according to one embodiment is configured such that the cooling water from the open type cooling tower is introduced, the filler tank in which the net bag containing activated carbon is disposed, and the cooling water from the filler tank. And a micro / nano bubble generating tank in which a submersible pump type micro / nano bubble generator is arranged, and the cooling water from the micro / nano bubble generating tank is introduced into the open cooling tower. .

  According to the above embodiment, since the activated carbon in a state that is contained in the mesh bag is filled in the filler tank, the organic matter in the cooling water can be adsorbed, and further, the activated carbon is propagated in a large amount, Organic substances adsorbed on activated carbon by microorganisms activated by nanobubbles can be decomposed and removed. Therefore, the quality of the cooling water can be improved. Further, since the water quality of the cooling water is remarkably improved, the heat exchange performance of the open cooling tower and the refrigerator can be improved. In addition, since the organic matter adsorbed on the activated carbon by the activated microorganism can be decomposed and removed, the activated carbon can be regenerated spontaneously. Therefore, since it is not necessary to artificially regenerate the activated carbon, the maintenance cost of the cooling device can be reduced.

  According to the cooling device of the present invention, since the generation amount of micro-nano bubbles is controlled based on a signal from the cooling water pump device, the generation amount of micro-nano bubbles is adjusted based on the flow rate of circulating cooling water. can do. Therefore, since the amount of micro-nano bubbles contained in the cooling water can be suppressed from becoming insufficient or excessive, it is possible to reduce the operating cost and to generate scale and slime in the open cooling tower and the refrigerator. Can be prevented. Moreover, since it can suppress that a scale generate | occur | produces in an open type cooling tower or a refrigerator, the heat exchange efficiency of an open type cooling tower or a refrigerator can be improved.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram showing a cooling device according to a first embodiment of the present invention.

  This cooling device includes an open type cooling tower 1, a cooling water pump device 41, a refrigerator 46, piping connecting them, and attached equipment.

  The open cooling tower 1 includes an upper part 32, an intermediate part 2 and a lower part 3. The upper part 32 is composed of two water storage tanks 4 and a fan 5. The two watering storage tanks 4 are spaced apart in the horizontal direction. A water spout 18 is formed on the bottom surface of the water sprinkler tank 4 so that cooling water is sprinkled from the water sprinkler tank 4 downward in the vertical direction. The fan 5 is disposed between the two water storage tanks 4. The fan 5 moves the air in the intermediate part 2 to the outside of the intermediate part 2 in a substantially vertical direction.

  The intermediate portion 2 is composed of a filler arrangement space and a louver 7 for preventing cooling water from scattering. A large number of string-type polyvinylidene chloride fillers 28, which are fillers, are filled in the filler arrangement space. The large number of string-like polyvinylidene chloride fillers 28 are arranged below the water spray tank 4 so as to extend in the vertical direction. The numerous string-like polyvinylidene chloride fillers 28 are supplied with cooling water from the water spray storage tank 4.

  The louver 7 is disposed below the end of each of the two watering storage tanks 4 opposite to the horizontal fan 5 side. The louver 7 prevents the cooling water from scattering from the region filled with the string-type polyvinylidene chloride filler 28.

  Microorganisms propagate stably on the string-like polyvinylidene chloride filler 28 over time. Microorganisms propagated in the string-type polyvinylidene chloride filler 28 are decomposed by treating the organic matter taken in the cooling water with microorganisms by dissolving the air containing the organic matter released from the factory in the cooling water. As a result, the water quality of the cooling water is improved.

  Note that the microbial concentration propagated in the string-type polyvinylidene chloride filler 28 is not as high as the microbial concentration in the contact oxidation tank in the wastewater treatment, and it is at a level whether the microorganism can be confirmed with the naked eye. . That is, the concentration of microorganisms that propagate on the string-type polyvinylidene chloride filler 28 is lower than that in the case where wastewater treatment is performed using microorganisms that propagate on the string-type polyvinylidene chloride filler.

  As will be described in detail later, the micro-nano bubbles are supplied to the string-like polyvinylidene chloride filler 28 so that the micro-nano bubbles adhere to the many string-like polyvinylidene chloride fillers 28. . The micro-nano bubbles are supplied to the string-type polyvinylidene chloride filler 28, and the cooling water is sprinkled from the sprinkling storage tank 4 to improve the heat exchange efficiency between the cooling water and the air.

  The above micro / nano bubbles are defined as follows. That is, normal bubbles (bubbles) are bubbles that rise in the water and finally pop off and disappear on the surface. Microbubbles are bubbles having a bubble diameter of 10 μm to 50 μm in diameter, Bubbles that shrink in water and eventually disappear (completely dissolve). Nanobubbles are bubbles that are even smaller than microbubbles (bubbles having a diameter of 200 nm or less) and can exist in water indefinitely. In the present specification, the micro-nano bubble is defined as a bubble in which the micro bubble described above and the nano bubble described above are mixed.

  The lower part 3 has a cooling tower water tank 9, a submersible pump type micro / nano bubble generator 12 and an electric conductivity meter 11. The submersible pump type micro / nano bubble generator 12 and the electric conductivity meter 11 are installed in the cooling tower water tank 9. The electric conductivity meter 11 measures the electric conductivity of the cooling water in the cooling tower water tank 9.

  Further, this cooling device has an accessory of the submersible pump type micro / nano bubble generator 12. Specifically, this cooling device includes a blower 35 for supplying air to the submersible pump type micro / nano bubble generator 12, a needle valve 34 for adjusting the generation amount of micro / nano bubbles, an air suction pipe 33, and an air suction pipe 38. Have The submersible pump type micro / nano bubble generator 12 generates the micro / nano bubbles by rotating and cutting the air from the blower 35 at a high speed.

  An electrical conductivity controller 14 is electrically connected to the submersible pump type micro / nano bubble generator 12 by wiring. The electrical conductivity adjuster 14 receives a signal from the electrical conductivity meter 11. The electrical conductivity controller 14 sends a signal for adjusting the rotation speed of the motor of the submersible pump type micro / nano bubble generator 12 to the submersible pump type micro / nano bubble generator 12 based on the signal from the electrical conductivity meter 11. It comes to send. Further, when the submersible pump type micro / nano bubble generator 12 receives a signal from the electrical conductivity controller 14, the rotation speed of the motor of the submersible pump type micro / nano bubble generator 12 is controlled, and the inside of the cooling water in the cooling tower water tank 9 is controlled. A desired amount of micro-nano bubbles is generated in the cooling water. The said motor comprises the adjustment part of the submersible pump type micro nano bubble generator 12 which is a micro nano bubble generator.

  When the measured value of the electric conductivity meter 11 is high, the amount of dissolved ions in the cooling water increases, and micro-nano bubbles are easily generated. When the measured value of the electric conductivity meter 11 is high, a large number of micro / nano bubbles are generated by increasing the motor rotation speed of the submersible pump type micro / nano bubble generator 12. As shown in FIG. 1, a watering pump 10 for transferring the cooling water of the cooling tower water tank 9 to the watering water storage tank 4 of the upper part 32 is installed outside the lower part 3. It is circulated between the upper part 32 and the lower part 3 at all times. When the measured value of the electrical conductivity meter 11 is high, the micro-nano bubble-containing cooling water containing micro-nano bubbles is sprinkled into the string-type polyvinylidene chloride filler 28 through the sprinkling storage tank 4, thereby forming a string-shaped mold. A large amount of micro / nano bubbles are attached to the polyvinylidene chloride filler 28.

  Therefore, when the measured value of the electrical conductivity meter 11 is high, the performance of the open cooling tower 1 can be improved spontaneously and markedly. Specifically, when the electrical conductivity in the cooling tower water tank 9 is high, the cooling water can be sprinkled in a state where a large number of micro-nano bubbles are attached to a large number of string-like polyvinylidene chloride fillers 28. Therefore, the heat exchange efficiency between cooling water and air can be remarkably improved.

  In addition, since a large amount of micro-nano bubbles having a cleaning effect can be generated, and microorganisms that decompose organic substances can be activated by the large amount of generated micro-nano bubbles, scale and slime in the open cooling tower 1 can be activated. The generation of scale can be efficiently suppressed, and the generation of scale can also be efficiently suppressed for the heat exchanger in the refrigerator 46.

  On the other hand, when the electrical conductivity in the cooling tower water tank 9 is low, micro / nano bubbles are not generated efficiently. Therefore, the motor rotation speed of the submersible pump type micro / nano bubble generator 12 is decreased to perform energy saving operation. It has become.

  The cooling tower water tank 9 is provided with a porous plate 15 extending in a substantially horizontal direction, and the submersible pump type micro / nano bubble generator 12 is installed on the porous plate 15. The perforated plate 15 is made of stainless steel or plastic. Needless to say, the porous plate 15 may be made of a material other than stainless steel and plastic. By adopting a perforated plate 15 as an installation plate of the submersible pump type micro / nano bubble generator 12, the cooling water can be moved to the suction side of the watering pump 10.

  It goes without saying that the open cooling tower 1 is easier to manage and more convenient if its system is simple. According to the first embodiment, since the submersible pump type micro / nano bubble generator 12 is used as the micro / nano bubble generator, accessories other than the micro / nano bubble generator in the micro / nano bubble generation system are used to generate micro / nano bubbles. An air suction pipe 33 for supplying air, a needle valve 34 for accurately controlling the amount of air supplied, a blower 35 for supplying air, and an air suction pipe 38 can be configured. . The micro / nano bubble generation system should be much simpler and simpler than a conventional micro / nano bubble generation system having a micro / nano bubble generator (not shown) and a circulation pump (not shown). Can do. Therefore, management of the micro / nano bubble generation system can be performed easily and at low cost. Moreover, a large amount of micro / nano bubbles can be generated as compared with the conventional micro / nano bubble generation system.

  The amount of air sucked by the submersible pump type micro / nano bubble generator 12 is larger than that of the conventional micro / nano bubble generating system, and the submersible pump type micro / nano bubble generator 12 can generate a large amount of micro / nano bubbles. Here, in the open type cooling tower 1, by increasing the amount of circulating water and using the submersible pump type micro / nano bubble generator 12, the micro / nano bubble generation amount per micro / nano bubble generator is reduced. As compared with the case where a submersible pump type micro nano bubble generator is not used, it can increase remarkably.

  In addition, when a large amount of micro-nano bubbles are attached to a large number of string-like polyvinylidene chloride fillers 28, the material that exchanges heat with the outside air is closer to the air, so that the heat exchange of the outside air can be performed efficiently. become able to. Therefore, as in the first embodiment, the fan 5 is driven, and the outdoor air 17 before heat exchange is passed through the louver 7 in the intermediate portion 2 of the open type cooling tower 1 to fill a large number of string-like polyvinylidene chloride. While being introduced into the material 28 portion and flowing out of the daytime portion 2, heat exchange of the outside air can be performed efficiently.

  A cooling water pump device 41, a micro / nano bubble generating unit 25 that is a micro / nano bubble generating device, and a refrigerator 46 are sequentially arranged at the rear stage of the open type cooling tower 1 from the open type cooling tower 1 side. In other words, the cooling water containing micro-nano bubbles is circulated in the order of the open cooling tower 1, the cooling water pump device 41, the micro-nano bubble generating unit 25, the refrigerator 46, and the open cooling tower 1. In addition, it cannot be overemphasized that a cooling water pump apparatus may be arrange | positioned so that a micro nano bubble containing cooling water may circulate in order of an open type cooling tower, a refrigerator, a cooling water pump apparatus, and an open type cooling tower.

  The cooling water in the cooling tower water tank 9 is introduced into the micro / nano bubble generating unit 25 by the cooling water pump device 41 having the strainer 40 in the inlet side pipe, and the micro / nano bubbles are additionally contained in the cooling water. Yes. The cooling water additionally containing micro / nano bubbles is sent to the refrigerator 46.

  The cooling water pump device 41 includes a main body (not shown) and a controller (not shown). The main body portion has a motor, while the control portion includes an inverter that controls the rotation speed of the motor, an input terminal as a signal input portion that inputs a signal, and an output terminal as a signal output portion that outputs a signal. Have Signals are input to the input terminal from the refrigerator 46 and the electrical conductivity controller 14, while signals are output from the output terminal to the submersible pump type micro / nano bubble generator 12 and a circulation pump 26 described later. Is output.

  The cooling water pump device 41 recirculates the cooling water flowing out from the open type cooling tower 1 to the open type cooling tower 1 through the refrigerator 46, and the cooling water is transferred between the open type cooling tower 1 and the refrigerator 46. It is designed to circulate. The cooling water pump device 41 is configured to control the flow rate of circulating cooling water by an inverter. The cooling water pump device 41 is configured to control the flow rate of the cooling water based on the signal from the refrigerator 46 and to send a signal indicating the amount of micro / nano bubbles generated to the cooling water pump device 41. Is output to the submersible pump type micro / nano bubble generator 12 based on the discharge amount.

  Therefore, when the refrigerating capacity of the refrigerator 46 is insufficient, the flow rate of the cooling water can be increased. On the other hand, when the refrigerating capacity of the refrigerator 46 is excessive, the flow rate of the cooling water can be decreased. it can. That is, the refrigerating capacity of the refrigerator 46 can be always appropriate. Moreover, since the generation amount of the micro / nano bubbles is controlled based on a signal from the cooling water pump device, the generation amount of the micro / nano bubbles can be adjusted based on the flow rate of the circulating cooling water. Therefore, the amount of micro / nano bubbles contained in the cooling water can be suppressed from being insufficient or excessive, the operation cost can be reduced, and scale and slime are generated in the open cooling tower 1 and the refrigerator 46. This can be surely prevented. Moreover, since the micro / nano bubbles are mixed in the cooling water, the heat exchange efficiency of the open cooling tower 1 and the refrigerator 46 can be increased efficiently.

  In addition, the said cooling water pump apparatus 41 becomes a structure which can also control the flow volume of a cooling water based on the signal from the electrical conductivity regulator 14 by setting.

  Further, as described above, the rotation speed of the motor of the submersible pump type micro / nano bubble generator 12 is controlled by a signal from the electrical conductivity controller 14. Therefore, in the first embodiment, the number of rotations of the motor of the submersible pump type micro / nano bubble generator 12 is controlled by the cooling water pump device 41, and further controlled by a signal from the electrical conductivity controller 14. It is like that. As described above, in the first embodiment, the amount of micro / nano bubbles generated is precisely adjusted by controlling the rotational speed of the motor of the submersible pump type micro / nano bubble generator 12 in two stages.

  The micro / nano bubble generating unit 25 has two flanges 36 so that it can be easily installed in the middle of the piping. The cooling water pump device 41 allows the cooling water to be easily introduced into the micro / nano bubble generating unit 25. Further, inside the micro / nano bubble generating unit 25, a swirl flow type micro / nano bubble generator 49 is fixedly installed. On the other hand, a circulation pump 26 is installed outside the micro / nano bubble generation unit 25, and the cooling water is pumped to the micro / nano bubble generator 49 by the circulation pump 26. In order to introduce an appropriate amount of air, a needle valve 37, an air suction pipe 38, and an air pipe (not shown) are sequentially connected to the micro / nano bubble generator 49 from the side close to the micro / nano bubble generator 49. The amount of micro / nano bubbles generated by the micro / nano bubble generating unit 25 is controlled by the circulation pump 26 to which a control signal from the cooling water pump device 41 is output via the signal line 24.

  The micronanobubble-containing cooling water that flows out of the open type cooling tower 1 and contains microbubbles is a micronanobubble generation unit 25 that additionally contains micronanobubbles and additionally contains micronanobubbles. In this state, it is introduced into the refrigerator 46.

  Inside the refrigerator 46, a heat exchanger 44 in the condenser and a heat exchanger 45 in the evaporator are installed. One end of the evaporator internal heat exchanger 45 is connected to the cold water return pipe 48, while the other end of the evaporator internal heat exchanger 45 is connected to the cold water forward pipe 47.

  When the operation of the refrigerator 46 is continued for a long time using the cooling water that does not contain micro-nano bubbles, scale is generated in the heat exchanger 44 in the condenser and the heat exchanger 45 in the evaporator, and heat is generated. Exchange efficiency decreases. However, when using the micro-nano bubble-containing cooling water containing micro-nano bubbles, the present inventor, even if the operation of the refrigerator 46 is continued for a long time, the heat exchanger 44 in the condenser and the heat exchange in the evaporator It has been found that the heat exchange efficiency is maintained at the same performance as that at the beginning of operation with almost no scale in the vessel 45. This is considered to be due to the large cleaning effect of the micro / nano bubbles.

  As shown in FIG. 1, the cooling water containing micro-nano bubbles exiting the heat exchanger 44 in the condenser is transferred to the water spray storage tank 4 of the open type cooling tower 1 through the cooling water outlet pipe 43 and the valve 19. It has become.

  The submersible pump type micro / nano bubble generator 12 is not limited to a manufacturer as long as it is commercially available. For example, a product made by Nomura Electronics Co., Ltd. can be used as the submersible pump type micro / nano bubble generator. Further, as the micro / nano bubble generator 49 in the micro / nano bubble generation unit 25, a product of Nano Planet Research Laboratory can be used. It goes without saying that the submersible pump type micro / nano bubble generator and the micro / nano bubble generator may be appropriately selected according to the purpose.

  According to the cooling device of the first embodiment, the submersible pump type micro / nano bubble generator 12 is installed in the open type cooling tower 1, and the micro / nano bubble generator 49 (micro / nano bubble unit) is connected to the outlet pipe of the cooling water pump device 41. 25, a micro / nano bubble generator 49 is installed) and the cooling water containing micro / nano bubbles is used as cooling water, and the open cooling tower 1 and the refrigerator 46 connected by piping are operated. The cooling efficiency can be significantly increased due to the contact between the cooling water containing micro-nano bubbles and the air in the open type cooling tower 1.

  Further, according to the cooling device of the first embodiment, in the system having the open cooling tower 1, the refrigerator 46, and the cooling water pump device 41, the cooling water containing micro-nano bubbles is circulated. The heat exchange efficiency in the heat exchange part in the cooling tower 1 and the refrigerator 46 can be improved.

  Moreover, in the system having the open cooling tower 1, the refrigerator 46, and the cooling water pump device 41, since the cooling water containing micro-nano bubbles is circulated, the pipe friction resistance can be reduced, and the cooling water can be reduced. The amount of power used by the pump device 46 can be reduced, and energy saving can be realized.

  Moreover, since the submersible pump type micro / nano bubble generator is set in the open type cooling tower 1 and the micro / nano bubbles are generated in the cooling water, the generation of algae can be suppressed by the sterilization / sterilization action of the micro / nano bubbles, The amount of water treatment chemicals to be introduced into the circulating cooling water can be greatly reduced.

  Further, since the submersible pump type micro / nano bubble generator 12 is installed in the open type cooling tower 1 and the cooling water containing the micro / nano bubbles is circulated through the apparatus, the passage of time At the same time, microorganisms can be propagated in the filler (polyvinylidene chloride) 28, and the water treatment (mainly organic matter treatment) of the cooling water can be performed by the propagated microorganisms. Therefore, the cooling water can be purified. In addition, this inventor confirmed that microorganisms did not propagate in parts other than a polyvinylidene chloride filling member. That is, it was confirmed that even when micronano bubbles were included in the cooling water, the water quality of the cooling water did not deteriorate, and conversely, it was confirmed that the water quality of the cooling water could be maintained at an excellent water quality for a long time.

  In summary, according to the cooling device of the first embodiment, since the cooling water containing micro-nano bubbles is used as the cooling water and the cooling water containing micro-nano bubbles is circulated, the frictional resistance in the pipe can be reduced. Thus, energy saving of the cooling water pump device 41 can be realized. Also. Since the cooling water containing micro-nano bubbles is circulated, the heat exchange efficiency in the condenser 44 of the refrigerator 46 can be maintained for a long time at the initial value of operation. Moreover, since the cooling water containing micro-nano bubbles is circulated, the amount of water treatment chemicals can be reduced, and the generation of slime and scale in the open type cooling tower 1 can be suppressed. Therefore, the running cost can be significantly reduced.

  In addition, according to the cooling device of the first embodiment, two types of micro / nano bubble generators (submersible pump type micro / nano bubble generator 12 and swirl flow type micro / nano bubble generator 49) are used. The number of fine bubbles can be increased, the amount of micro / nano bubbles generated can be increased, the action of the micro / nano bubbles can be increased, and the cooling water can be treated effectively.

  In detail, the submersible pump type micro / nano bubbles can generate micro / nano bubbles which are larger than the micro / nano bubble generated by a swirl type micro / nano bubble generator. Compared to micro / nano bubble generators, it can be generated in large quantities. Here, the present inventor has found that the smaller the size of the ultrafine bubble micro-nano bubble, the more effective, and the generation amount of the micro-nano bubble affects the scale generation preventing action. Therefore, by using two types of micro / nano bubble generators (submersible pump type micro / nano bubble generator and swirl flow type micro / nano bubble generator) in combination, the action of the micro / nano bubbles can be enhanced.

  In particular, conventionally, the open type cooling tower has a large equipment itself, and scale and slime are easily generated. In the first embodiment, since the submersible pump type micro / nano bubble generator 12 capable of generating a large amount of micro / nano bubbles is installed in the open type cooling tower 1, the generation of scale and slime in the open type cooling tower 1 is suppressed. it can. Further, since the open cooling tower 1 is large in equipment itself, it is possible to install the submersible pump type micro / nano bubble generator 12 larger than the swirling flow type micro / nano bubble generator without increasing the arrangement space. it can. On the other hand, the swirling flow type micro / nano bubble generator 49 is light in weight, and therefore can be easily installed in the middle of the pipe as compared with the submersible pump type micro / nano bubble generator.

(Second Embodiment)
FIG. 2 is a schematic diagram showing a cooling device according to a second embodiment of the present invention.

  The cooling device of the second embodiment is different from the cooling device of the first embodiment only in that each of the sprinkling storage tank 4 and the cooling tower water tank 9 is filled with a string-like polyvinylidene chloride filler 28.

  In the cooling device of the second embodiment, the same components as those of the cooling device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the cooling device of the second embodiment, the description of the operation and effect common to the cooling device of the first embodiment will be omitted, and only the configuration and the operation and effect different from those of the cooling device of the first embodiment will be omitted. I will explain.

  In the second embodiment, since the sprinkling storage tank 4 and the cooling tower water tank 9 are filled with the string-like polyvinylidene chloride filler 28, the generated microorganisms are concentrated in the string-like polyvinylidene chloride filler 28. Can be bred. In addition, the density | concentration of the microorganisms which are intensively propagated in the string-type polyvinylidene chloride filler 28 is low compared with the case where wastewater treatment is performed with microorganisms. This is because the polluted organic matter does not flow into the cooling water unlike the drainage water, so that the ability of microorganisms to decompose organic matter can be lowered.

  In the second embodiment, since the sprinkling storage tank 4 and the cooling tower water tank 9 are filled with the string-like polyvinylidene chloride filler 28, microorganisms can be propagated on the string-type polyvinylidene chloride filler 28. . Further, since the microorganism concentration is low, the microorganisms can be concentrated and propagated in the string-type polyvinylidene chloride filler 28. Therefore, the water treatment of the cooling water is carried out by microorganisms that are concentrated and propagated in the string-type polyvinylidene chloride filler 28 and are activated by the micro-nano bubbles. Adhesion to the water storage tank 4 and the cooling tower water tank 9 can be suppressed.

(Third embodiment)
FIG. 3 is a schematic diagram showing a cooling device according to a third embodiment of the present invention.

  The cooling device of the third embodiment is different from the cooling device of the first embodiment in that each of the water spray storage tank 4 and the cooling tower water tank 9 is filled with a ring-type polyvinylidene chloride filler 29.

  In the cooling device of the third embodiment, the same components as those of the cooling device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Further, in the cooling device of the third embodiment, the description of the operation effects and modifications common to the cooling device of the first embodiment will be omitted, and only the configuration and operation effects different from those of the cooling device of the first embodiment will be omitted. I will explain.

  In the third embodiment, since the water spray storage tank 4 and the cooling tower water tank 9 are filled with the ring-type polyvinylidene chloride filler 29, the generated microorganisms are concentrated and propagated in the ring-type polyvinylidene chloride filler 29. be able to. In addition, the density | concentration of the microorganisms which are concentrated and propagated in the ring-type polyvinylidene chloride filler 29 is low compared with the case where wastewater treatment is performed with microorganisms. This is because the polluted organic matter does not flow into the cooling water unlike the drainage water, so that the ability of microorganisms to decompose organic matter can be lowered.

  In the third embodiment, since the water spray storage tank 4 and the cooling tower water tank 9 are filled with the ring-type polyvinylidene chloride filler 29, microorganisms can be propagated in the ring-type polyvinylidene chloride filler 29. Further, since the microorganism concentration is low, the microorganisms can be concentrated and propagated in the ring-type polyvinylidene chloride filler 29. Accordingly, the water treatment of cooling water is actually carried out by microorganisms that are concentrated and propagated in the ring-type polyvinylidene chloride filler 29 and are activated by the micro-nano bubbles. Adhesion to the storage tank 4 and the cooling tower water tank 9 can be suppressed.

(Fourth embodiment)
FIG. 4 is a schematic diagram illustrating a cooling device according to a fourth embodiment.

  The cooling device of the fourth embodiment is different from the cooling device of the first embodiment in that each of the water spray storage tank 4 and the cooling tower water tank 9 is filled with a net bag 30 containing activated carbon 31.

  In the cooling device of the fourth embodiment, the same components as those of the cooling device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Further, in the cooling device of the fourth embodiment, the description of the operation and effect common to the cooling device of the first embodiment will be omitted, and only the configuration and the operation and effect different from those of the cooling device of the first embodiment will be omitted. I will explain.

  In the fourth embodiment, since the sprinkler storage tank 4 and the cooling tower water tank 9 are filled with the net bag 30 containing the activated carbon 31, the generated microorganisms are concentrated and propagated on the activated carbon 31 in the net bag 30. Can do. In addition, the density | concentration of the microorganisms which are intensively growing on the activated carbon 31 in the net bag 30 is a low density | concentration compared with the case where waste water treatment is performed with a microorganism. This is because the polluted organic matter does not flow into the cooling water unlike the drainage water, so that the ability of microorganisms to decompose organic matter can be lowered.

  In the third embodiment, since the water bag 4 and the cooling tower water tank 9 are filled with the net bag 30 containing the activated carbon 31, microorganisms can be propagated on the activated carbon 31 in the net bag 30. Further, since the microorganism concentration is low, it can be concentrated and propagated on the activated carbon 31 in the net bag 30. Therefore, since the cooling water is treated with microorganisms that are concentrated and activated on the activated carbon 31 and are activated by the micro-nano bubbles, the scale and slime water storage tank 4 and the cooling tower water tank are used. Adhesion to 9 can be suppressed. Since the organic matter concentration in the cooling water is low, the activated carbon 31 adsorbs the organic matter and the organic matter adsorbed on the activated carbon 31 is decomposed by microorganisms at the same time. To play. Therefore, it is not necessary to artificially regenerate the activated carbon 31.

(Fifth embodiment)
FIG. 5 is a schematic diagram showing a cooling device according to a fifth embodiment of the present invention.

  In the cooling device of the fifth embodiment, the same components as those of the cooling device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Further, in the cooling device of the fifth embodiment, description of operational effects and modifications common to the cooling device of the first embodiment will be omitted, and only the configuration and operational effects different from those of the cooling device of the first embodiment will be omitted. I will explain.

  Compared with the first embodiment, the cooling device of the fifth embodiment omits the submersible pump type micro / nano bubble generator 12 in the open type cooling tower 1, and is newly installed outside the open type cooling tower 1. And a filling material tank 20 and a micro / nano bubble generation tank 21.

  A pipe 69, a valve 19 and a pipe 70 are sequentially connected to the cooling tower water tank 9 from the cooling tower water tank 9 side. The cooling water containing micro-nano bubbles flowing out from the end of the pipe 70 opposite to the cooling tower water tank 9 side is introduced into the filler tank 20. The bubbles 19 adjust the amount of cooling water containing micro / nano bubbles introduced from the cooling tower water tank 9 to the filler tank 20. The filler tank 20 is filled with a string-like polyvinylidene chloride filler 28 as a filler, and microorganisms gradually grow in the string-like polyvinylidene chloride filler 28 over time. ing. For this reason, the micro / nano bubble-containing cooling water introduced into the filler tank 20 is microbiologically purified.

  A pipe 71 is connected to the filler tank 20, and the micro / nano bubble-containing cooling water flowing through the pipe 71 is introduced into the micro / nano bubble generation tank 21. In addition, a pipe 72, a cooling tower circulation pump 27, and a pipe 73 are sequentially connected to the micro / nano bubble generation tank 21 from the micro / nano bubble generation tank 21 side. The cooling water containing micro / nano bubbles flowing through the pipe 73 is introduced into the cooling tower water tank 9. The cooling tower circulation pump 27 circulates the cooling water containing micro / nano bubbles in order of the cooling tower water tank 9, the filler tank 20, the micro / nano bubble generation tank 21, and the cooling tank water tank 9. In the micro / nano bubble generation tank 21, an underwater pump type micro / nano bubble generator 22 is installed. The circulating cooling water is additionally supplied to the micro / nano bubble generation tank 21 in the micro / nano bubble generation tank 21. Therefore, a sufficient amount of micro-nano bubbles is supplied to the string-like polyvinylidene chloride filler 28 filled in the filler tank 20, and the string-like polyvinylidene chloride filler 28 is supplied to the string-like polyvinylidene chloride filler 28. Propagating microorganisms can be activated.

  According to the cooling device of the fifth embodiment, the submersible pump type micro / nano bubble generator 22 is installed outside the open type cooling tower 1, and the micro / nano bubble generator 49 (micro / nano bubble generator) is connected to the outlet pipe of the cooling water pump device 41. Since the micro-nano bubble generator 49 is installed in the unit 25), the cooling water containing the micro-nano bubbles is used as the cooling water, and the open cooling tower 1 and the refrigerator 46 connected by piping are operated. Moreover, the cooling efficiency by the contact of the micronanobubble-containing cooling water and the air in the open type cooling tower 1 can be remarkably increased.

(Sixth embodiment)
FIG. 6 is a schematic view showing a cooling device according to a sixth embodiment of the present invention.

  The cooling device of the sixth embodiment is different from the cooling device of the fifth embodiment in that the filler filled in the filler tank 20 is a ring-type polyvinylidene chloride filler 29.

  In the cooling device of the sixth embodiment, the same components as those of the cooling device of the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted. In the cooling device of the sixth embodiment, the description of the operation and effect common to the cooling device of the first embodiment and the operation and effect common to the cooling device of the fifth embodiment will be omitted.

  In the fifth embodiment, the filler in the filler tank 20 is a string-type polyvinylidene chloride filler 28, but in the sixth embodiment, it is replaced with a ring-type polyvinylidene chloride filler 29.

  Of course, the more suitable one of the string-type vinylidene chloride packing and the ring-type polyvinylidene chloride packing is selected depending on the structure of the cooling tower, the quality of the cooling water, and the like. The microorganisms propagate in the ring-type polyvinylidene chloride filling 29 with the passage of time, and the propagated microorganisms decompose and remove organic substances contained in the cooling water containing micro-nano bubbles. That is, it is possible to suppress the scale and slime from adhering to the apparatus by performing the water treatment of the cooling water containing micro / nano bubbles by the microorganisms activated by the micro / nano bubbles.

(Seventh embodiment)
FIG. 7 is a schematic diagram showing a cooling device according to a seventh embodiment of the present invention.

  The cooling device of the seventh embodiment is different from the cooling device of the fifth embodiment in that the filler tank 20 is filled with a net bag 30 containing activated carbon 31.

  In the cooling device of the seventh embodiment, the same components as those of the cooling device of the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted. Further, in the cooling device of the seventh embodiment, the description of the operations and effects common to the cooling device of the first embodiment and the operations and effects common to the cooling device of the fifth embodiment will be omitted.

  Of course, the more suitable one of the polyvinylidene chloride packing and the activated carbon 31 is selected depending on the structure of the cooling tower, the quality of the cooling water, and the like.

  The activated carbon 31 contained in the mesh bag 30 grows microorganisms with time, and the propagated microorganisms decompose and remove organic substances contained in the cooling water containing micro-nano bubbles.

  Since the organic matter concentration in the cooling water containing micro-nano bubbles is low, the activated carbon 31 adsorbs the organic matter and the organic matter adsorbed on the activated carbon 31 is decomposed by microorganisms in parallel. To play. It is the same as in the cooling device of the fourth embodiment that there is no need to artificially regenerate the activated carbon 31.

(Eighth embodiment)
FIG. 8 is a schematic diagram showing a cooling device according to an eighth embodiment of the present invention.

  The cooling device of the eighth embodiment is that the ozone generator 51 is connected to the submersible pump type micro / nano bubble generator 12 arranged in the cooling tower water tank 9 instead of connecting the blower 35 to the first embodiment. Different from the cooling device.

  In the cooling device of the eighth embodiment, the same components as those of the cooling device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Further, in the cooling device of the eighth embodiment, the description of the operational effects and modifications common to the cooling device of the first embodiment will be omitted, and only the configuration and operational effects that are different from the cooling device of the first embodiment will be omitted. I will explain.

  In the eighth embodiment, since it is not the blower 35 but the ozone generator 51 that is connected to the submersible pump type micro / nano bubble generator 12 arranged in the cooling tower water tank 9, Bactericidal action can be enhanced. That is, in the eighth embodiment, since the cooling water contains ozone micro-nano bubbles, the cooling water can be sterilized at all times. In addition, this inventor discovered and confirmed that the ozone micro nanobubble lasts for a long time, while normal ozone water lose | disappears the effect of ozone in a short time.

The inventor conducted the following experiment based on the cooling device of the first embodiment. Specifically, the water storage tank 4 has a capacity of about 0.3 m ³ , the intermediate section 2 has a capacity of about 4 m ³ , the cooling tower water tank 9 has a capacity of about 1 m ³ , and the cooling water pump device 41 has a small cooling capacity. Using a water pump device and using a small refrigerator as the refrigerator 46, operation was carried out by introducing industrial water into the open cooling tower 1 for one month. After the operation, the scale generation amount was compared between the conventional open cooling tower and the open cooling tower 1. As a result, the amount of scale generated in the open type cooling tower 1 of the cooling device of the first embodiment was about 20% of the amount of scale generated in the open type cooling tower of the conventional cooling device. From this, according to the cooling device of the present invention, compared to the conventional case, the amount of scale can be rapidly reduced by about 80%, and the state of the cooling water is gentle to the human body. Heat exchange can be performed while maintaining a very clean state for a long time.

  As mentioned above, although the cooling device of 1st-8th embodiment was demonstrated, in this invention, the component of at least 2 or more embodiment of the cooling device of 1st-8th embodiment is combined, and it is new. Needless to say, the embodiment can be easily formed. As an example, for example, a combination of the second embodiment and the fifth embodiment, the string-type polyvinylidene chloride filler 28 in each of the sprinkler storage tank 4 and the cooling tower water tank 9 of the cooling device of the fifth embodiment. Needless to say, it may be possible to fill the material.

It is a schematic diagram which shows the cooling device of 1st Embodiment of this invention. It is a schematic diagram which shows the cooling device of 2nd Embodiment of this invention. It is a schematic diagram which shows the cooling device of 3rd Embodiment of this invention. It is a schematic diagram which shows the cooling device of 4th Embodiment of this invention. It is a schematic diagram which shows the cooling device of 5th Embodiment of this invention. It is a schematic diagram which shows the cooling device of 6th Embodiment of this invention. It is a schematic diagram which shows the cooling device of 7th Embodiment of this invention. It is a schematic diagram which shows the cooling device of 8th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Open type cooling tower 2 Middle part 3 Lower part 4 Sprinkling storage tank 5 Fan 6 Outside air after heat exchange 7 Louver 8 Heat exchange filler 9 Cooling tower water tank 10 Sprinkling pump 11 Electric conductivity meter 12 Submersible pump type micro nano bubble generator 13 Water flow 14 Electrical conductivity controller 15 Perforated plate 16 Wiring 17 Outside air before heat exchange 18 Sprinkling 19 Valve 20 Filling material tank 21 Micro / nano bubble generation tank 22 Submersible pump type micro / nano bubble generator 23 Water flow 24 Signal line 25 Micro / nano bubble generation unit 26 Circulation pump 27 Cooling tower circulation pump 28 String-type polyvinylidene chloride filler 29 Ring-type polyvinylidene chloride filler 30 Mesh bag 31 Activated carbon 32 Upper part 33 Air suction pipe 34 Needle valve 35 Blower 36 Flange 37 Needle valve 38 Air suction pipe 39 Water flow 40 Strainer 41 Cooling water pump device 42 Cooling water return piping 43 Cooling water return piping 44 Heat exchanger in condenser 45 Heat exchanger in evaporator 46 Refrigerator 47 Cooling water return piping 48 Cold water return piping 49 Micro-nano bubble generator 50 Signal Line 51 Ozone generator

Claims (14)

An open cooling tower,
A refrigerator into which cooling water cooled by the open cooling tower is introduced;
The open-type cooling tower and the refrigerator are provided between the open-type cooling tower and the refrigerator, and suck and discharge the cooling water and control the flow rate of the discharged cooling water. A cooling water pump device capable of controlling the flow rate of the cooling water that circulates
While generating micro-nano bubbles in the cooling water, comprising a micro-nano bubble generator having an adjustment unit for adjusting the generation amount of the micro-nano bubbles,
The said cooling water pump apparatus has a signal output part which outputs the signal showing the desired generation amount of the said micro nano bubble according to the discharge amount of the said cooling water to the said micro nano bubble generator. The cooling device according to claim 1, wherein
The cooling water pump device controls the flow rate of the cooling water based on a signal from the refrigerator. The cooling device according to claim 1, wherein
The above-mentioned micro / nano bubble generator is a submersible pump type micro / nano bubble generator disposed outside or inside the open type cooling tower. The cooling device according to claim 1, wherein
An underwater pump type micro / nano bubble generator is installed inside the open type cooling tower, and a micro / nano bubble generator is connected between the open type cooling tower and the refrigerator, and the inside of the open type cooling tower A cooling device characterized by being filled with a polyvinylidene chloride filler. The cooling device according to claim 3, wherein
While having a cooling tower water tank on the outflow side of the cooling water inside the open type cooling tower, and having an electric conductivity meter in the cooling tower water tank,
The said adjustment part of the said submersible pump type | mold micro nano bubble generator is controlled based on the signal from the said electric conductivity meter, The cooling device characterized by the above-mentioned. The cooling device according to claim 3, wherein
The adjustment unit is a motor of the submersible pump type micro / nano bubble generator,
The number of rotations of the motor is controlled based on a signal from the cooling water pump device. The cooling device according to claim 4, wherein
Between the open cooling tower and the refrigerator, the cooling water pump device and the micro-nano bubble generator are sequentially connected from the open cooling tower side,
The amount of micro-nano bubbles generated by the micro-nano bubble generation device is controlled based on a signal from the cooling water pump device. The cooling device according to claim 1, wherein
The open type cooling tower has a watering storage tank, an intermediate part located below the watering storage tank and a filler disposed therein, and a cooling tower water tank located below the intermediate part,
A cooling apparatus, wherein the water storage tank and the cooling tower water tank are filled with a string-type polyvinylidene chloride filler. The cooling device according to claim 1, wherein
The open type cooling tower has a watering storage tank, an intermediate part located below the watering storage tank and a filler disposed therein, and a cooling tower water tank located below the intermediate part,
The cooling apparatus, wherein the water spray storage tank and the cooling tower water tank are filled with a ring-type polyvinylidene chloride filler. The cooling device according to claim 1, wherein
The open type cooling tower has a watering storage tank, an intermediate part located below the watering storage tank and a filler disposed therein, and a cooling tower water tank located below the intermediate part,
The cooling device, wherein a net bag containing activated carbon is disposed in the water spray storage tank and the cooling tower water tank. The cooling device according to claim 1, wherein
A cooling device comprising an ozone generator connected to the micro-nano bubble generator. The cooling device according to claim 1, wherein
The cooling water from the open type cooling tower is introduced, and a filler tank filled with a string-type polyvinylidene chloride filler,
The cooling water from the filler tank is introduced, and a micro / nano bubble generating tank in which a submersible pump type micro / nano bubble generator is disposed,
The cooling device, wherein the cooling water from the micro / nano bubble generating tank is introduced into the open cooling tower. The cooling device according to claim 1, wherein
The cooling water from the open cooling tower is introduced, and a filler tank filled with a ring-type polyvinylidene chloride filler,
The cooling water from the filler tank is introduced, and a micro / nano bubble generating tank in which a submersible pump type micro / nano bubble generator is disposed,
The cooling device, wherein the cooling water from the micro / nano bubble generating tank is introduced into the open cooling tower. The cooling device according to claim 1, wherein
While the cooling water from the open cooling tower is introduced, a filler tank in which a net bag containing activated carbon is disposed,
The cooling water from the filler tank is introduced, and a micro / nano bubble generating tank in which a submersible pump type micro / nano bubble generator is disposed,
The cooling device, wherein the cooling water from the micro / nano bubble generating tank is introduced into the open cooling tower.

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