JP2017129305A - cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the utilization rate of total generating energy of a blower in a cooling tower which supplies compressed air from a blower to a jet generating pipe provided at an air outlet.SOLUTION: In a cooling tower CT3 which supplies compressed air from a blower 2 to a jet generating pipe 1 provided at an air outlet 107, the blower 2 is attached to the outer side of the cooling tower CT3 and air is suctioned from an upper space in the cooling tower CT3 by using the blower 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling tower for air conditioning equipment or industrial equipment.

  In air-conditioning facilities and industrial facilities that use cooling water, cooling towers that cool water by using latent heat of water evaporation are widely used. In this cooling tower, cooling water from the load side is cooled by being brought into direct contact with the outside air sucked into the tower by a blower while flowing down the surface of the filler in the cooling tower. Such a cooling tower includes a counter flow type (also referred to as a counter flow type, see, for example, Patent Documents 1 to 3) and a cross flow type (depending on the flow direction of the cooling water flowing down the surface of the filler and the outside air. Also referred to as a cross flow type (see, for example, Patent Documents 4 and 5). The counterflow type is usually a round type, and the crossflow type is usually a square type.

  FIG. 15 shows an example of the configuration of a conventional counterflow type cooling tower. The cooling tower CT1 has an outside air intake port 101 for sucking outside air into the tower body 100 at the lower outer peripheral portion of the tower body 100. The tower body 100 has a sprinkling arm 102 directly below it. In this case, the filler 103 for promoting heat exchange is arranged so that a space is formed in the lower part of the tower body 100 by the support member 104. In addition, a water supply pipe 105 for sending cooling water returning from the load side to the sprinkling arm 102 is provided at the center of the tower body 100, and the cooling water cooled by the filler 103 is received at the bottom of the tower body 100. The water tank 106 is further provided with an air blower 31 in an exhaust port 107 provided in the upper part of the tower body 100. The blower 31 is usually a bladed blower configured by a blade (impeller) 31a such as a propeller fan and a motor 31b that rotates the blade (see Patent Document 1). In FIG. 15, the thin arrow a shows the movement of the cooling water, and the thick arrow A shows the movement of the outside air. Wi is cooling water returning from the load side, Wo is cooling water sent to the load side, Ai is air sucked into the tower body 100, and Ao is air discharged outside the tower body 100.

  FIG. 16 shows an example of the configuration of a crossflow type cooling tower. The cooling tower CT2 is provided with an upper water tank 201 for receiving cooling water returned from the load side at the upper part in the tower body 200, and between the upper water tank 201 and a lower water tank 202 provided at the bottom of the tower body 200. A packing material 203 is provided, outside air intake ports 204 are provided on both sides of the tower body 200 at a height corresponding to the packing material 203, and a blower 32 is provided at an exhaust port 205 at the top of the tower body 200. The blower 32 is also a bladed blower that includes a blade 32a and a motor 32b that rotates the blade 32a. When the blower 32 is rotated, outside air is sucked from the outside air intake port 204, and heat exchange between the outside air and the cooling water sprayed from the upper water tank 201 to the filling material 203 is promoted by the filling material 203. The air that has passed is configured to be exhausted from the exhaust port 205 to the outside of the tower body 200 (see Patent Document 5). In FIG. 16, the thin arrow a shows the movement of the cooling water, and the thick arrow A shows the movement of the outside air. Wi is cooling water returning from the load side, Wo is cooling water sent to the load side, A i is air sucked into the tower body 200, and Ao is air discharged outside the tower body 200.

JP 2003-139488 A JP 2011-122745 A JP 2003-65686 A JP-A-8-49989 Japanese Patent Laid-Open No. 203a1226 Japanese Patent No. 5826882

  As described above, the conventional cooling tower is provided with the blower (31, 32) at the exhaust port (107, 205) of the tower body (100, 200) in both the counter flow type and the cross flow type. In the case of a counter flow type cooling tower, the large cooling tower has an exhaust port 107 having a diameter of 1500 to 3800 mm and an outer diameter of about 5000 to 8500 mm. Some are 1700-12000 mm, 2800-3300 mm high, and 3300-3800 mm deep. Further, the depth of the lower water tank (202) of the crossflow type cooling tower may be 1000 mm or more. And in the conventional large-sized cooling tower, the propeller fan etc. from which the required air volume is obtained for the blade of an air blower are used.

  In such a large cooling tower, an operator may have to enter the tower in order to perform maintenance of the sprinkler and filler. In particular, the sprinkler deteriorates relatively quickly, so the maintenance frequency is high, and the space between the sprinkler and the blower is narrow, so it is often necessary to work in a posture where the waist or back is bent. .

  When performing such maintenance work, of course, to ensure safety, the fan drive motor is turned off, but if multiple cooling towers or blowers are installed, in order to maintain the cooling function, It is customary to turn off all the blower drive motors one after the other without turning them off at once. However, because the order of the cooling tower or blower that turns off the power is wrong, the blower suddenly rotates during maintenance work in the tower, and the operator is caught in the blades of the blower (including propellers). There are many examples of painful deaths. In addition, there have been reports of cases in which a blade or the like of a blower that suddenly rotates crashes into the lower water tank and dies in order to escape from the blade. Furthermore, there is a possibility that the parts of the blower are deteriorated or damaged and scattered from the exhaust port.

  Even if such an accident does not occur, the blower used in the conventional cooling tower has a motor, a blade, etc., and these are installed in the exhaust port. Since it cannot be moved in and out, there are problems such as that maintenance work and parts replacement cannot be easily performed, and it takes time.

  In view of the above, the applicant of Patent Document 6 described in Patent Document 6 aims to provide a cooling tower that can prevent the occurrence of the above-described accidents and that can be safely and easily maintained and replaced. On the inside, instead of the conventional motor and blade, an annular jet generating pipe that generates an upward jet is provided, and the diameter of the outlet of the cooling tower and the opening of the jet generating pipe is set by the maintenance worker. A cooling tower has been proposed which has a diameter enough to enter the tower through the opening, and is configured to supply pressurized air from a blower provided outside the exhaust port to the jet generation pipe.

  The jet generating pipe is formed in an annular shape, and has an internal passage that is continuous around the central axis of the opening of the jet generating pipe by a continuous inner wall and an outer wall. It is curved in the direction, and the tip of the outer wall is close to the outer surface of the tip of the inner wall with a predetermined distance. A jet opening that opens in the upper direction of the central axis of the opening is formed between both tip portions, and the jet outlet is gradually narrowed from the internal passage side to the outlet, so that it is supplied from the blower to the internal passage. The compressed air thus compressed is further compressed at the jet outlet. As a result, a jet is generated that jets from the outlet of the jet outlet toward the upper part of the central axis of the opening. When an upward jet is generated from the jet outlet of the jet generating pipe, the jet draws air existing in the opening of the jet generating pipe according to Bernoulli's law, and is discharged upward from the exhaust port along with the air. The amount of air drawn into the jet is several times greater than the amount of air in the jet. And the air volume which moves the inside of an opening part becomes the total amount of the jet flow from the jet outlet of a jet flow generation pipe, and the air drawn in by a jet flow in an opening part. Further, since the upper space in the tower is decompressed by drawing air in the opening, the amount of air that is sucked in from the outside air intake and discharged from the exhaust is amplified. Therefore, the cooling efficiency of the cooling tower increases.

  According to the above invention, since there is no motor and blade inside the exhaust port, the effect of preventing accidents can be obtained, and the maintenance worker can enter the tower through the opening of the jet generating pipe, so The effect that the maintenance work such as equipment and fillers and the replacement of parts can be performed safely and easily is exhibited.

  Furthermore, in the cooling tower using the conventional blower with blades, the intake energy of the blower is used, but the exhaust energy is not used. In other words, it can be seen that the total energy generated by the blower (total generated energy) includes the energy on the intake side (intake energy) and the energy on the exhaust side (exhaust energy). The cooling tower used uses only a part of the total generated energy.

  The blower for supplying pressurized air to the jet generating pipe of the cooling tower according to the invention described in Patent Document 6 is attached so as to suck outside air outside the cooling tower. Therefore, also in this blower, the exhaust energy is used for cooling the cooling water (the exhaust energy is converted into the intake energy by the jet flow from the jet generating pipe), but the intake energy of the blower is used for cooling the cooling water. Therefore, there is a similar problem that the total generated energy of the blower is not fully utilized.

  The present invention has been made with this point in mind, and in a cooling tower that supplies pressurized air from a blower to a jet generation tube provided in an exhaust port, the utilization rate of the total generated energy of the blower is improved. Objective.

In order to achieve the above object, the present invention provides a cooling tower for supplying pressurized air from a blower to a jet generating pipe provided in an exhaust port, and the blower is attached to the outside of the cooling tower, and the blower is used as an upper space in the cooling tower. It is characterized by inhaling from.
With the above configuration, when the blower is operated, the air in the upper space in the cooling tower is sucked into the blower and the pressurized air is supplied to the jet generating tube.

Further, the present invention provides the above cooling tower, wherein an annular intake pipe is provided in the upper space in the cooling tower, and the other end of the intake duct having one end connected to the air suction port of the blower is connected to the intake pipe. Is characterized in that a plurality of intake holes are provided at intervals in the longitudinal direction.
With the above configuration, when the blower is operated, the air in the upper space in the cooling tower is sucked into the intake pipe from the intake hole, and the pressurized air is supplied to the jet generating pipe through the intake duct and the blower.

  The diameter of the annular intake pipe may be the same as the diameter of the jet generating pipe, or one may be larger than the other. The planar shapes of the annular intake pipe and the jet generating pipe may be approximated or different.

  Depending on the exhaust capacity required for the cooling tower, the number of jet generating pipes is the same as the case where one jet generating pipe is provided close to the inner wall surface of the cooling tower exhaust port, and further inside the jet generating pipe. In some cases, another jet generating pipe is installed. Two jet generation pipes having different diameters may be arranged concentrically inside the exhaust port, and exhaust ducts of a plurality of blowers may be connected to each jet generation pipe.

  It is preferable to provide one or a plurality of blowers, open the other end of the intake duct having one end connected to the intake port of the blower to the upper space in the cooling tower, and connect the exhaust duct of the blower to the jet generating pipe.

  Two jet generation pipes may be arranged in two upper and lower stages inside the exhaust port, and an exhaust duct of a blower may be connected to each jet generation pipe.

  According to the present invention, in a cooling tower for supplying pressurized air from a blower to a jet generating tube provided in an exhaust port, the blower sucks air from the upper space in the cooling tower. Since the energy is also used for cooling the cooling water, the utilization rate of the total generated energy of the blower is improved and the cooling capacity of the cooling tower is remarkably increased. Therefore, it is possible to reduce the size and operating cost of the cooling tower blower having the same refrigeration capacity.

It is a front view which partially breaks and shows an example at the time of applying 1st embodiment of this invention to a counterflow type cooling tower. It is a top view of the cooling tower of FIG. FIG. 3 is a plan view showing an annular intake pipe of FIG. 2 extracted. It is a longitudinal cross-sectional view of the jet generating pipe of FIG. It is a figure explaining the effect | action of the jet generating pipe of FIG. It is a top view which shows another example of 1st embodiment. It is sectional drawing which shows an example of the arrangement structure of the jet generating pipe of FIG. It is sectional drawing which shows the other example of the arrangement structure of the jet generating pipe of FIG. It is a front view which partially breaks down and shows an example at the time of applying the first embodiment of the present invention to a cross flow type cooling tower. It is a top view of the cooling tower of FIG. It is a top view which removes a lid and shows other examples at the time of applying the first embodiment of the present invention to a cross flow type cooling tower. It is a longitudinal cross-sectional view of the cooling tower of FIG. It is a front view which partially fractures and shows an example at the time of applying 2nd embodiment of this invention to a counterflow type cooling tower. It is a top view of the cooling tower of FIG. It is a front view which fractures | ruptures and shows a part of typical example of the conventional counterflow type | mold cooling tower. It is a front view which fractures | ruptures and shows a part of typical example of the conventional crossflow type | mold cooling tower.

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

<First embodiment>
FIG. 1 shows an example when the present invention is applied to a counterflow type cooling tower. The same or corresponding members as those in FIG. 15 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the cooling tower CT3 according to the first embodiment of the present invention, a bladeless blower B1 having no impeller is used instead of the conventional blower with blades. The bladeless blower B1 includes a jet generating pipe 1, a blower 2, and an annular intake pipe 3. The jet generating pipe 1 is attached to the inside of the exhaust port 107 of the tower body 100. The blower 2 is attached to the outside of the tower body 100, and the exhaust duct 2 a of the blower 2 is connected to the jet generating pipe 1. The intake pipe 3 is provided in the upper space C in the tower body 100 and is connected to the intake duct 2 b of the blower 2.

  When the bladeless blower B1 is operated, the air A in the upper space C in the tower body 100 is sucked upward from the exhaust port 107, and the upper space in the tower body 100 is depressurized. The outside air Ai is sucked from the air, passes between the fillers 103, and is exhausted upward from the exhaust port 107. Unlike the conventional blower with blades, the jet generation pipe 1 does not have a blade, and induces an air flow by generating an upward jet in the exhaust port 107, so that the upper space C in the tower body 100 is Air A is sucked up and moved upward from the exhaust port 107. The principle will be described in detail later.

  As shown in FIGS. 2 and 4, the jet generating pipe 1 is formed in an annular shape and has an opening O at the center. Further, as illustrated in FIG. 4, the jet generating pipe 1 is formed of one or a plurality of plates and includes a pipe portion 11 and a guide plate 12. The tube portion 11 forms an internal passage 13 that continues around the central axis of the opening O of the jet generating tube 1.

  The pipe part 11 is cut at a point on the circumference in parallel with the axis of the pipe part in the longitudinal direction, and an inner wall 11a formed by narrowing one wall inward, and an outer wall that overlaps with the outside of the inner wall 11a. 11b, and a spout 14 having a narrow gap is formed between the overlapping portions of the inner wall 11a and the outer wall 11b. The spout 14 is opened upward. Therefore, the pressurized air a supplied from the blower 2 to the internal passage 13 is further compressed at the jet port 14. As a result, as shown in FIG. 5, a jet b that is jetted from the outlet of the jet outlet 14 toward the upper part of the central axis of the opening O is generated.

  And the end of the guide plate 12 is connected to the front-end | tip of the inner wall 11a, or its vicinity. The guide plate 12 extends in the opening direction of the jet port 14, that is, upward, and slightly curves from the tip of the inner wall 11 a to the inside of the opening O, and then reverses and curves to the outside. The inner curved surface of the lower half of the guide plate 12 and the subsequent outer curved surface are designed so that the Coanda effect occurs in which the jet b ejected from the jet port 14 rises as a laminar flow along the guide plate 12. ing. That is, since the guide plate 12 acts as the Coanda surface and the jet port 14 has a nozzle function, the pressurized air a in the internal passage 13 is guided to become a vigorous air flow (jet flow b).

  As shown in FIG. 5, when an upward jet b is generated from the jet outlet 14 of the jet generating pipe 1, the jet b draws air c existing in the opening O of the jet generating pipe 1 according to Bernoulli's law, Along with the air c, it is discharged upward from the exhaust port 107. The amount of air drawn into the jet b is several times greater than the amount of air in the jet b. The amount of air moving in the opening O is the total amount of the jet b from the jet outlet 14 of the jet generating tube 1 and the air c drawn by the jet b in the opening O. In addition, since the upper space C in the tower is decompressed by drawing the air c into the opening O, the amount of air that is sucked from the outside air intake port 101 and discharged from the exhaust port 107 increases. Therefore, the cooling efficiency of the cooling tower CT3 increases.

  A blower 2 having a different amount of air flow depending on the required refrigeration ton of the cooling tower is used. Therefore, the exhaust duct 2a that connects the internal passage 13 of the jet generating pipe 1 and the blower 2 can be connected to the blower 2 having a different amount of blown air. The bladeless blower B1 may be configured such that the blower 2 is connected to the jet generating pipe 1 in advance. And the part which connects the air blower 2 to the jet flow generation pipe 1 is good to connect so that pressurized air may be equally distributed from the air blower 2 to the both sides of a connection part.

  The blower 2 supplies pressurized air to the jet generating pipe 1 in order to generate a jet in the jet generating pipe 1, and as shown in FIGS. 2 and 6, a fan 21 and a motor 22 for rotating the fan 21 are provided. It consists of. As the blower 2 for this purpose, a blower that can supply the amount of pressurized air necessary for generating the air flow inside the tower necessary for the cooling capacity of the cooling tower CT3 by the jet flow from the jet generating pipe 1 is used. As the fan 21, for example, a normal bladed blower such as a propeller fan, a turbo fan, or a sirocco fan can be used. An ejector blower or a compressor may be used instead of the bladed blower.

  The blower 2 sucks and pressurizes air and supplies the air to the jet generating pipe 1. As shown in FIG. 1, the air in the upper space C in the tower body 100 is used as the air. For this purpose, an annular intake pipe 3 is provided in the upper space in the tower body 100 above the water spray arm 102.

  The plane shape and size of the intake pipe 3 are desirably set so that the intake pipe 3 does not become an obstacle to the upward airflow passing through the opening O of the jet generating pipe 1. For example, it is desirable that it is at least equal to or larger than the planar shape and size of the jet generating tube 1. One end of an intake duct 2 b is coupled to the intake pipe 3 at a part thereof, and the other end of the intake duct 2 b is coupled to a suction port of the blower 2. As an example of the intake pipe 3, a large number of intake holes penetrating from the upper space C in the tower body 100 to the internal passage of the intake pipe 3 at the bottom surface at intervals in the longitudinal direction (circumferential direction) of the intake pipe 3. 3a is formed. Further, in order to make the intake resistance equal in any intake hole 3a, as shown in FIG. 3, the diameter of the intake hole 3a increases as the distance from the connection port 3b between the intake hole 3a and the intake duct 2b of the blower 2 increases. It is desirable to do.

  Thus, when the blower 2 is driven, the suction port side is depressurized, so the air in the upper space C in the tower body 100 is sucked into the internal passages of the intake pipe 3 from the numerous intake holes 3a of the intake pipe 3 and The air is sucked into the blower 2 through the duct 2 b and is pressurized, and the pressurized air is supplied from the blower 2 to the internal passage 13 of the jet generating tube 1.

  Since the air in the upper space C in the tower body 100 is sucked from a large number of intake holes 3 a of the intake pipe 3, in addition to the increase in the amount of air discharged from the exhaust port 107 by the jet flow generating pipe 1, Since the air flow in the inner heat exchange region is further promoted, the heat exchange rate of the cooling tower is further improved.

  The air flow sucked from the upper space in the tower by the jet flow from the jet generating pipe 1 and generated in the opening O is less turbulent than the case of using a conventional bladed fan and is close to a laminar flow. Moreover, the jet generating tube 1 does not have a blade. Therefore, the noise generated from the exhaust port 107 is very small.

  Further, since the amount of air flowing through the opening O due to the jet flow from the jet generating pipe 1 is increased as compared with the case of using a conventional blower with a blade, the blower 2 with a blade conventionally used at the exhaust port 107 is provided in the blower 2. What has a smaller air blowing capacity than that can be used. Therefore, the equipment cost and operating cost of the cooling tower can be reduced.

  Further, the jet generating pipe 1 of the bladeless blower B1 has an annular shape having no blades. Therefore, the operator can easily enter the tower through the opening of the jet generating pipe 1, and can safely and easily perform maintenance of the water spray arm 102, the filler 103, and the intake pipe Y in the tower. In addition, since the blower 2 having a movable part is provided outside the tower body 100, the maintenance of the blower 2 can be performed safely and easily. Therefore, the maintenance of the bladeless blower B1 can be performed safely and easily.

  The jet generating pipe 1 provided in the exhaust port 107 does not have a blade, and the blower 2 that may have a blade is installed outside the tower body 100, and the blade does not come out. Therefore, even if the bladeless blower B1 is accidentally turned on during the maintenance work in the tower, the worker is not exposed to danger, so the maintenance work can be performed with peace of mind.

  When the exhaust amount at the exhaust port 107 is small, one jet generating pipe 1 is provided. When the exhaust amount at the exhaust port 107 is large and the diameter of the exhaust port 107 is particularly large, as shown in FIG. 7, the jet generating pipes 1, 1 having different diameters of at least two openings in the exhaust port 107. 'May be provided concentrically or in two upper and lower stages as illustrated in FIG.

  When a plurality of jet generating pipes are provided concentrically, the outer jet generating pipe and the inner jet generating pipe may be provided at the same height, or one of the outer jet generating pipe and the inner jet generating pipe may be lower than the other. It can also be provided at a position or higher position. When a larger air volume is required, the number of blowers may be the same as the number of jet generation pipes, and the blowers and jet generation pipes may be connected one-on-one.

  FIG. 9 shows an example in which the first embodiment of the present invention is applied to a crossflow type cooling tower. The same or corresponding members as those in FIG. 16 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the cross-flow type cooling tower CT4, a bladeless blower B2 is attached to the exhaust port 205 in place of the conventional bladed blower and blower driving motor. In general, since the exhaust amount in the cross flow type cooling tower CT4 is larger than the exhaust amount in the counter flow type cooling tower CT3, the cooling tower CT4 includes two concentrically arranged jet generating tubes 1, 1 ′. Is attached.

  In order to implement the present invention in the cross flow type cooling tower CT4, as shown in FIGS. 9 and 10, the upper space C formed between the left and right fillers 203 or the left and right upper water tanks 201 has an annular shape. An intake pipe 3 'is installed. In this example, the intake pipe 3 'is formed in a substantially rectangular shape, and a large number of intake holes are provided on the bottom surface. The other end of the intake duct 210, whose lower end is connected to the intake pipe 3 ', is connected to the suction port of the blower 21 of the bladeless blower B2.

  Also in the above embodiment, a low-noise and high-safety cross-flow type cooling tower can be provided.

  When the cross flow type cooling tower is particularly large, a plurality of exhaust ports 205 may be provided in the ceiling portion. In such a case, the bladeless blower B1 having a single jet generating tube 1 shown in FIGS. 1 and 2 at each exhaust port 205 or a blade having a plurality of jet generating tubes shown in FIGS. The less blower B2 can be attached. Moreover, you may use combining bladeless air blower B1 and B2 suitably.

  The shape of the jet generating tube 1 in plan view is not limited to the above-described circular shape, and may be an elliptical shape, an oval shape, a rectangular shape, or the like. In addition, the number of the fans 2 that supply the primary air flow is not limited to one but may be plural.

  FIG. 11 is a cross-sectional view illustrating a bladeless blower B3 provided in the crossflow type cooling tower CT5. In this example, a circular jet generating pipe 1a is used for the heat exchange chamber 31 with a small area where the filler is arranged, and an oval shape is used for the heat exchange chamber 32 with a large area where the filler is arranged. The jet generating pipe 1b is used. The blower 2 is mounted in a box 33 installed on one side of the upper space between the packing materials in the tower, and pressurized air is sent from the blower 2 through the exhaust duct 34 to each of the jet generating tubes 1a, 1a, 1b. When a larger amount of air is required, the fans 2 and 2 may be provided on both sides of the upper space C in the tower.

  Also in the case of the cross flow type cooling tower CT5 of FIGS. 11 and 12, one annular intake pipe 3 ′ is installed in the upper space C formed between the left and right fillers 203 or the left and right upper water tanks 201. Yes. When the blowers 2 and 2 are provided on both sides, the intake duct 210 is coupled between the blowers 2 and 2 and a position near the blowers 2 and 2 of the intake pipe 3 ′.

  FIG. 11 shows an example in which one intake pipe 3 ′ is installed. However, two intake pipes 3 ′ are provided between the blowers 2, 2, and each of them is connected by the intake duct 210. 2 may be bonded.

<Second Embodiment>
FIG. 13 shows a second embodiment of the present invention. In this embodiment, the intake pipe 3 shown in FIG. 1 is not provided in the upper space C in the tower. Instead, the intake duct 2b of the blower 2 provided outside the tower body 100 is opened to the upper space C in the tower. In this case, it is preferable to provide two blowers 2 with respect to the jet generating pipe 1 and at positions opposite to each other with respect to the center O of the jet generating pipe 1 and connect the intake duct 2b to each blower. Thereby, since an equal intake force is exerted on the entire upper space C, a balanced updraft can be generated between the packing materials 103 in the tower. Therefore, each filler can exhibit a uniform heat exchange rate.

  Also in the second embodiment, since both the intake energy and the exhaust energy of the blower 2 are used, the utilization rate of the entire generated energy of the blower is significantly improved. Therefore, effects such as downsizing the blower and reducing operating costs can be expected.

<Other embodiments>
In the above embodiment, the case where an operator can enter the tower from the opening of the jet generating tube 1 has been described. However, the present invention allows the maintenance worker to enter the tower from the opening of the jet generating tube. It is not limited to those that can enter.

  In any of the embodiments, the wind discharged from the exhaust ports (107, 205) is excellent in straight running performance and large wind power. Therefore, by providing an impeller and a generator above the exhaust ports, wind power generation is possible. It can also be used.

CT1 to CT5 Cooling tower
100, 200 towers
101,204 Outside air intake
102, 202 Watering arm
103, 203 filler
107, 205 Exhaust ports B1, B2, B3 Bladeless blower 1, 1a, 1b Jet generating pipe 2 Blower 2a Exhaust duct 2b Intake duct
210 Air intake duct 21 Blower (Blower with blade)
22 Motor 3, 3 'Intake pipe 3a Intake hole

Claims (5)

  A cooling tower for supplying pressurized air from a blower to a jet generating pipe provided in an exhaust port, wherein the blower is attached to the outside of the cooling tower, and the blower sucks air from the upper space in the cooling tower. .   2. The cooling tower according to claim 1, wherein an annular intake pipe is provided in an upper space in the cooling tower, and an intake duct of the blower is connected to the intake pipe.   3. The cooling tower according to claim 2, wherein a plurality of intake holes are provided at intervals in the longitudinal direction of the intake pipe.   2. The cooling tower according to claim 1, wherein one or a plurality of the blowers are provided, and the other end of the intake duct having one end connected to the intake port of the blower is opened to an upper space in the cooling tower. A cooling tower, wherein an exhaust duct is connected to the jet generating pipe.   2. The cooling tower according to claim 1, wherein two jet generating pipes are arranged in two upper and lower stages inside the exhaust port, and an exhaust duct of the blower is connected to each jet generating pipe. .

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