JP5945707B2 - Water spray blowing device and water spray cooling system using the same - Google Patents

Description

  The present invention relates to water spray cooling that locally cools in an outdoor space, an open space, or an indoor space.

  2. Description of the Related Art Conventionally, this type of water spray blowing device has been known that has a water spray nozzle that sprays water in a ventilation path and is provided in front of a wind-up blade (see, for example, Patent Document 1).

  Hereinafter, the water spray blowing device will be described with reference to FIG. As shown in FIG. 8, the water spray nozzle 102 faces the inside of the ventilation path 101, and the water spray nozzle 102 is continuously provided in front of the wind blowing blades 103.

  If the cooling water is supplied to the water spray nozzle 102 via the cooling water supply pipe 104, the water spray nozzle 102 sprays the cooling water into the ventilation passage 101. Is mixed with a spray of cooling water while passing through the ventilation path 101, and becomes cold air due to the vaporization phenomenon of fine water droplets forming a mist, and is sent out in front of the wind tunnel 105 to be blown out as an air flow 106. Is done.

  In addition, in this type of water spray blowing device, there is also a device in which a water spray nozzle 107 for spraying water is provided in the outside air introduction passage 110 outside the outer casing 109 of the blower 108 (see, for example, Patent Document 2). .

  The water spray blowing device will be described below with reference to FIG. As shown in FIG. 9, an axial-flow blower 108 and a water spray nozzle 107 provided in the vicinity of the outlet of the blower 108 are provided. The water spray nozzle 107 includes an outside air introduction passage 110 formed by the inner case 111 and an outer case 112 spaced from the inner case 111 by a predetermined radial distance, and the spray nozzle 107 provided in the outside air introduction passage 110. have.

  The inner case 111 is constituted by an outlet portion of the outer casing 109 of the blower 108, and the outer case 112 is concentric with the inner case 111, and the inlet 113 side is provided with a bell so that the outside air can be easily introduced. It is shaped like a mouse. A bell mouth type outer casing 109 has a dustproof screen 114 and an axial-flow type blower 108 in order from the entrance.

  The water supplied to the water supply pipe 115 is sprayed from the water spray nozzle 107 to the outside air introduction passage 110. The outside air is introduced into the outside air introduction passage 110 by the suction force of both the outflow air current of the blower 108 and the spray water ejected from the water spray nozzle 107, and is sucked into the outside air introduction passage 110 and sprayed into the outside air introduction passage 110. The sprayed water is mixed with the high-speed outside air passing through here, and this mixed air merges with the outflow air current of the blower 108 to become a blown air flow 116 and is blown out.

Japanese Utility Model Publication No. 51-070057 (microfilm of Japanese Utility Model Application No. 49-145147) Utility Model Registration No. 3122136

  In such a conventional water spray blowing device, in the case where the water spray nozzle is provided in the ventilation passage, the water spray nozzle causes the pressure loss, and the outer edge portion of the blown air flow is caused by the influence of the induced air flow caused by the blown air flow. A vortex is generated around the blown airflow, and the eddy current causes a part of the blown airflow including the cooling air cooled by the heat of vaporization of the water spray to be separated from the blown airflow, and the cooling air is wasted. The blown airflow is easy to spread due to the vortex flow, and if the airflow spreads, the wind speed decreases, it is difficult to maintain the blown airflow at a constant wind speed, and the diffusion of the blown airflow including cooling air to the target area is suppressed. There was a problem that it was difficult to maintain the blowing airflow.

  Even if a water spray nozzle is not provided in the ventilation path and a water spray nozzle is provided in the surrounding outside air introduction passage, the water spray nozzle can eliminate the cause of the pressure loss of the blower. Due to the outside air passing through the passage, a vortex flow is generated around the outer edge of the blown airflow after joining the outside air and around the blowout airflow.

  In particular, when the inflowing outside air is at a high speed, the outside air containing the spray water is blown out by the vortex of the outside air after mixing the spray water, or by the generation of the vortex just after the outside air after mixing the spray water and the outflow air current of the blower, that is, the blowout airflow. It is easy to escape from the air flow, and the vortex current tends to spread the blown air flow.If the air flow is widened, the wind speed is lowered, and it is difficult to maintain the wind speed of the blown air flow. It had the subject that it was difficult to maintain the wind speed of the blown-out airflow.

  Therefore, the present invention solves the above-described conventional problems, and an object thereof is to provide a water spray blowing device that suppresses diffusion of a blown air flow including cooling air and maintains a wind speed of the blown air flow up to a target region. To do.

In order to achieve this object, the present invention includes an air outlet for blowing air, a bell mouth provided on one circumference of the outer peripheral surface around the air outlet, and a hole formed in the bell mouth. And a water spray nozzle that is fixed to the bell mouth, the hole is closed, provided in the bell mouth, and sprays water toward a blown air flow blown out from the air outlet.

  As a result, the water spray nozzle is provided in the bell mouth and sprayed and injected toward the blown air flow blown from the blowout port, so that the induced airflow by the blown air flow blown from the blowout port is outside the bell mouth. The air flow is directed toward the air flow, but the bell mouth becomes the resistance of the induced air flow, and the wind speed of the induced air flow is reduced compared to the case without the bell mouth, and the air blown from the water spray nozzle is sprayed and sprayed from the air outlet The generation of eddy currents in the vicinity of merging with the flow is suppressed.

  The diffusion of the cooling air to the outside due to the generation of vortex flow, that is, the diffusion of the blown air flow from the blown air flow blown out from the blowout port is suppressed, and the spread of the blown air flow is suppressed. The air speed of the blown air flow is maintained, the air flow becomes stable, and it becomes easy to reach the target area, for example, the operator, and the diffusion of the air flow including cooling air is suppressed and the air speed of the air flow is maintained. It is possible to provide a water spray blowing device that achieves this.

  The blown air flow is the fastest immediately after the blowout from the blowout port, and the attracting force by the water spray nozzle water spray is also added, and the flow velocity of the induced airflow is also increased. Bellmouth resists the air flow induced by spraying.

  Compared to the case without the bell mouth, the flow velocity of the blown air flow and the induced air flow caused by the water spray of the water spray nozzle provided in the bell mouth is suppressed. As a result, the generation of vortex flow is suppressed and the diffusion of the blown air flow is also suppressed. It will be suppressed.

According to the present invention, the air outlet that blows out air, the bell mouth that is provided around the outer peripheral surface of the air outlet, and the hole that is opened in the bell mouth are fixed to the bell mouth. The water spray nozzle is provided in the bell mouth by providing the water spray nozzle that sprays water toward the blown air flow that is provided in the bell mouth and is blown out from the air outlet. By spraying and injecting toward the blown air flow blown out from, the induced airflow caused by the blown air flow blown out from the blowout port flows from the outside of the bellmouth toward the airflow. It becomes resistance, and the wind speed of the induced airflow becomes smaller than when there is no bell mouth, the generation of vortex by the induced airflow is suppressed, and it joins with the blown air flow sprayed from the water spray nozzle and blown from the outlet The generation of eddy currents in the vicinity is suppressed, and the diffusion of cooling air to the outside due to the generation of eddy currents, that is, the diffusion of the blown air flow from the blowout port to the outside of the blown air flow, is suppressed, and the blown air flow spread As a result, the air velocity of the blown air flow blown out from the blowout port is maintained, and the airflow is stabilized and easily reaches a target region, for example, an operator. It is possible to provide a water spray blowing device that suppresses the diffusion of the blown airflow including cooling air and maintains the wind speed of the blown airflow.

  The blown air flow is the fastest immediately after the blowout from the blowout port, and the attracting force by the water spray nozzle water spray is also added, and the flow velocity of the induced airflow is also increased. As for the induced air flow by spraying, the bell mouth becomes resistance, and compared with the case without the bell mouth, the flow velocity of the induced air flow by the water spray of the blowing air flow and the water spray nozzle provided in the bell mouth is suppressed. The generation of vortex flow is suppressed, and the diffusion of the blown airflow is also suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS (a) The top view which shows the water spray blowing apparatus of Embodiment 1 of this invention The same top view, (b) The side view The schematic diagram which shows the water spray blowing apparatus connected to the ventilation duct of Embodiment 1 and 2 of this invention (a) Same plan view, (b) Same side view Schematic diagram of a water spray blowing device showing the water spray angle of Embodiments 1 and 2 of the present invention Schematic which shows the water spray blowing apparatus of Embodiment 3 of this invention Sectional drawing which shows the cross section of the water spray blowing apparatus of Embodiment 4 of this invention Sectional drawing which shows the cross section of the water spray blowing apparatus of Embodiment 5 of this invention Schematic diagram showing a water spray cooling system according to a sixth embodiment of the present invention. Sectional drawing which shows the cross section of the conventional water spray blowing apparatus Sectional drawing which shows the cross section of the water spray blowing apparatus

The water spray blowing device according to claim 1 of the present invention includes a blow-out port for blowing out air, a bell mouth provided around one outer peripheral surface around the blow-out port, and a hole formed in the bell mouth. And a water spray nozzle that is fixed to the bell mouth, the hole is closed, provided in the bell mouth, and sprays water toward a blown air flow blown out from the air outlet.

  As a result, the water spray nozzle is provided in the bell mouth and sprayed and injected toward the blown air flow blown from the blowout port, so that the induced airflow generated by the blown air flow blown from the blowout port is outside the bell mouth. The air flow is directed toward the air flow, but the bell mouth becomes the resistance of the induced air flow, and the wind speed of the induced air flow is reduced compared to the case without the bell mouth, and the air blown from the water spray nozzle is sprayed and sprayed from the air outlet The generation of eddy currents in the vicinity of merging with the flow is suppressed.

  The diffusion of the cooling air to the outside due to the generation of vortex flow, that is, the diffusion of the blown air flow from the blown air flow blown out from the blowout port is suppressed, and the spread of the blown air flow is suppressed. The air speed of the blown air flow is maintained, the air flow becomes stable, and it becomes easy to reach the target area, for example, the operator, and the diffusion of the air flow including cooling air is suppressed and the air speed of the air flow is maintained. It is possible to provide a water spray blowing device that achieves this.

  The blown air flow is the fastest immediately after the blowout from the blowout port, and the attracting force of the water spray nozzle by the water spray is added, and the flow velocity of the induced airflow is also increased, but the blown air flow immediately after the blowout and the water of the water spray nozzle As for the induced air flow by spraying, the bell mouth becomes resistance, and compared with the case without the bell mouth, the flow velocity of the induced air flow by the water spray of the blowing air flow and the water spray nozzle provided in the bell mouth is suppressed. The generation of vortex flow is suppressed, and the diffusion of the blown airflow is also suppressed.

  By suppressing the diffusion of the blown airflow including the cooling air and maintaining the wind speed of the blown airflow, it is possible to provide a water spray blowing device that can efficiently cool locally in an outdoor space, an open space, an indoor space, or the like.

  A plurality of water spray nozzles may be provided, and the angle at which water is sprayed from the direction parallel to the central axis of the outlet toward the central axis may be different for each of the water spray nozzles.

  As a result, the water spray angle, i.e., the spray angle at which water is ejected is different for each water spray nozzle, so that the collision of spray water is further prevented, the formation of condensed water droplets, the formation of condensed water, Evaporation delay is further prevented, and the effect of evaporating quickly in the blown air flow is achieved.

  Further, the angle may be 20 degrees to 40 degrees.

  As a result, the spray water and the blown air stream are smoothly mixed, and the spray water is quickly evaporated and vaporized in the blown air stream to obtain a cooled blown air stream.

  Moreover, you may make it the structure that the blower outlet was rotatable.

  As a result, the outlet can be freely rotated, and the outlet direction can be freely set in accordance with the movement of the target area, for example, the movement of the operator, and a user-friendly water spray outlet can be provided.

  Moreover, you may make it the structure of having the damper which controls the blowing airflow blown off from a blower outlet.

  Thereby, the wind speed, the air volume, etc. of the blown air flow can be adjusted by damper control, and an easy-to-use water spray blowing device can be provided.

  Moreover, you may make it the structure that control of the blowing air flow by a damper and water spraying were interlock | cooperated.

  Thereby, according to the necessity of cooling air, adjustment of the wind speed of a blowing air flow, an air volume, etc., and the amount of water spray, and the amount of cooling can be controlled and adjusted, and the water spray blowing apparatus which is easy to use can be provided.

  Moreover, you may make it the structure that the relative humidity of the blowing air flow after evaporation of the sprayed water shall be the relative humidity-80% of the blowing air flow just before spraying.

  Thereby, it becomes easy to feel uncomfortable when the relative humidity exceeds 80%, but a comfortable water spray blowing device can be provided by setting the relative humidity to less than 80% RH.

  Moreover, you may make it the structure of the water spray cooling system provided with the air blower which ventilates air, and the water spray blowing apparatus in any one of Claims 1 thru | or 7.

  Thereby, by incorporating the air blower which blows air, the mobility of a water spray blowing apparatus increases, and the freedom degree of a cooling zone increases more.

  Moreover, the water spray provided with the water spray blowing apparatus in any one of the Claims 1 thru | or 7 which was connected to the said duct, and was provided for every predetermined space | interval with the air blower which blows air, and the said air blower. A cooling system may be used.

  Thereby, the water spray cooling system which can supply cooling air for every target area | region, for example for every operator can be provided.

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

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the water spray blowing device 1 includes an air outlet 2 that blows out air, a bell mouth 3 provided around the air outlet 2, and an air blown from the air outlet 2 that is provided in the bell mouth 3. A water spray nozzle 5 for spraying water toward the stream 4 is provided.

  For example, as shown in FIG. 2, when the water spray blower 1 is connected to a ventilation duct 6 through which air is blown, the blower outlet 2 and the ventilation duct 6 communicate with each other, and the inside is a ventilation path 7. The blown air flow 4 is blown out from the blowout port 2 through the ventilation duct 6. As an example of use of the water spray blowing device 1, it is connected to the ventilation duct 6 through which air is blown, but it is only necessary to connect so that the blown air flow 4 is blown from the blowout port 2, and air is blown. In place of the ventilation duct 6, although not illustrated, the ventilation duct 6 may be connected to the blowout side of a blower that blows air. What is necessary is just to connect so that air may not leak from a connection surface, for example, fitting with the water spray blowing apparatus 1 and the ventilation duct 6, or the blowing side frame of a blower, etc., fixing with a bolt nut, adhesion fixing, integral molding, etc. . The water spray blowing device 1 may or may not include the ventilation duct 6.

  The water spray nozzle 5 is supplied with water for spraying from the water supply pipe 8 and is directed toward the blown air flow 4 blown from the blower outlet 2, for example, as shown in FIG. 3, the central axis 9 of the blower outlet 2. The angle A in the direction 11 in which water is sprayed from the parallel direction 10 toward the central axis 9 is 20 degrees to 40 degrees, and water is sprayed.

  The water spray nozzle 5 is formed in the bell mouth 3, for example, though not shown in the figure, by making a hole in the bell mouth 3, passing the water spray nozzle 5 through the hole, and sandwiching the bell mouth 3 between them. It is fixed with a stopper 12 and a nut 13 provided in After fixing, the hole is preferably closed. The water spray nozzle 5 has an outer diameter of, for example, φ32 and a length of 80 L including a portion fixed to the bell mouth, and is fixed to the bell mouth 3 at the approximate center in the length direction of the water spray nozzle 5.

  The water spray nozzle 5 is made of SUS in terms of rust prevention and strength, and the air outlet 2, the bell mouth 3, and the ventilation duct 6 are also made of aluminum, anti-corrosion paint in consideration of rust prevention, strength, weight reduction, usability, etc. It is selected from the iron plate which gave, or resin.

  In the above configuration, for example, the inner diameter of the blowout port 2 is φ235, the outer diameter of the bell mouth 3 is φ310, the air volume blown from the blowout port 2 is 50 m3 / min, and the wind speed is 19.2 m / s. The spray water amount is 2.36 L / hour per unit, three water spray nozzles 5 and three water spray nozzles 5 are provided at the positions of equilateral triangles on the bell mouth 3, and the spray pressure is 6 MPa. The angle A and B of the spray direction from each water spray nozzle 5 spraying water from the direction 10 parallel to the central axis 9 toward the central axis 9, and another angle (not shown) of 40 degrees, If water is sprayed from the spray nozzle 5, spray water droplets having a particle size of approximately 20 to 30 μm are ejected, evaporate along the air flow, and cool the air by heat of vaporization.

  The method of determining the specifications such as the amount of water spray is determined by experiment and confirmed by experiment. For example, the inner diameter of the outlet 2 is a region where the target cooling air is supplied by experiment or simulation based on the experiment. And the area of the area, for example, the area of the work area and the distance to the work area according to the work of the operator, and then, depending on the required wind speed in the work area, for example, in the work area If the required wind speed is 0.5 m / s, the wind speed at the outlet 2 is determined by experiment, and when the wind speed is determined, the air volume is determined by the previously determined inner diameter. By the experiment, the blowout air speed and the blowout air volume at the air outlet 2 are confirmed. Next, the amount of water spray and the cooling temperature may be roughly determined from the wet air diagram, specific heat, heat of vaporization, temperature, humidity, and the previously determined air volume, and confirmed by experiments.

  In the present embodiment, the temperature of the air blown from the outlet 2 is 32 ° C., the humidity is 60% RH, a temperature drop of about 3 to 5 ° C. is observed, and the work at a point about 14 m away from the outlet 2 is performed. When the air is blown toward the person, a cool breeze about 3 to 5 ° C. lower than the ambient temperature is obtained at a point about 14 m away from the air outlet 2, and the operator can feel that the wind is blowing 0 A cool breeze of 5 m / s was obtained.

  The humidity at a point approximately 14 m away from the air outlet 2 was 80% RH, and when it exceeded 80% RH, the worker felt uncomfortable, but a comfortable working environment with no discomfort was obtained.

  If the outside water is used to spray the blown water as the blown air flow 4 from the blowout port 2, cooling is performed by the heat of vaporization of the sprayed water, and ventilation is also performed. For example, fume is ventilated and clean at the welding site. It leads to improvement of the working environment, and the outside air has a high temperature and a low relative humidity, and accordingly, the amount of water allowed for evaporation increases, and even if the amount of water spray is large, it evaporates and tends to decrease the cooling temperature due to the heat of vaporization.

  According to such a configuration, the bell mouth serves as a resistance to the induced air flow, the wind speed of the air flow induced by the blown air flow and the water spray is reduced, and is merged with the blown air flow sprayed from the water spray nozzle and ejected from the air outlet. The generation of eddy currents in the vicinity of the airflow is suppressed, the diffusion of the blown airflow including the cooling air is suppressed, the wind speed of the blown airflow is maintained, the feeling of cool air is given to the worker, and the work environment is improved.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  When there are a plurality of water spray nozzles 5, for example, three water spray nozzles 5, for example, they are provided on the bell mouth 3 at the position of an equilateral triangle, and from the direction 10 parallel to the central axis 9 of the outlet 2 to the central axis 9. The angle A, B of the spray direction of each water spray nozzle 5 that sprays water toward, and another angle (not shown) are different, and each angle is 40 degrees, 30 degrees, 20 degrees, When water is sprayed, compared with the case where the angles are the same, the spray water and the sprays are prevented from colliding with each other, the generation of condensed water is prevented, and the water is quickly evaporated in the blown air flow.

  For example, in the case where there are two water spray nozzles 5, for example, they are provided on the bell mouth 3 so as to face each other, and if one angle A is 40 degrees and the other angle B is 30 degrees and water is sprayed, the angles are the same. Compared to the case, the collision of spray water and sprays is prevented, the generation of condensed water is prevented, and the water is evaporated quickly in the blown air flow.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIG. The same parts as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the water spray blowing device 1 includes an air outlet 2 that blows out air, a bell mouth 3 provided around the air outlet 2, and an air outlet 2 that is provided in the bell mouth 3. A water spray nozzle 5 for spraying water toward the blown air flow 4 is provided, and a ventilation duct 6 through which air is blown is connected to the air outlet 2. The side opposite to the air outlet 2 of the ventilation duct 6 is a half-broken sphere 14, and is fitted in close contact with a cone 17 provided in a chamber 16 communicating with the duct 15 through which air is blown. The air outlet 2 and the duct 15 communicate with each other, and can be rotated by fitting the half-broken sphere 14 of the air duct 6 and the cone body 17, and the air outlet 2 that communicates with the air duct 6 is rotatable.

  With this configuration, the air outlet 2 can be rotated vertically and horizontally and obliquely, and the air outlet direction can be freely set according to the movement of the operator, improving usability.

(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in any of Embodiments 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the damper 18 is provided in the blower outlet 2 which blows out air, and opening and closing of the damper 18 controls the blown-out air quantity and blown-out wind speed of the blown air flow 4 blown out from the blower outlet 2. As shown in FIG.

  The opening and closing of the damper 18 is controlled by an electric motor 19, the water supply pipe 8 is provided with an electric valve 20, and the water supply from the water supply pipe 8 to the water spray nozzle 5 is controlled by the electric valve 20. If the opening and closing of the motor 18 and the on / off of the motor-operated valve 20 are controlled in conjunction with each other, the water spray from the water spray nozzle 5 is performed only when the damper is opened, and the water spray cooling is performed efficiently. According to the necessity of cooling air, it is possible to provide a user-friendly water spray blowing device that can control and adjust the damper adjustment, water spray amount, and cooling amount such as the wind speed and air volume of the blown air flow.

  In addition, although the damper 18 was directly provided in the blower outlet 2, although not shown in figure, the ventilation duct may be connected with the blower outlet 2, and the damper 18 may be provided in the ventilation duct.

(Embodiment 5)
Embodiment 5 of the present invention will be described with reference to FIG. The same parts as those in any of Embodiments 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the blower frame 22 of the blower 21 is connected to the blowout port 2 that blows out air. Water is sprayed from the water spray nozzle 5 toward the blown air flow 4 blown from the blower outlet 2 communicating with the blower 21, and the generation of vortex flow is suppressed by the bell mouth 3, and the blown airflow including cooling air is diffused. The wind speed of the suppressed blown airflow is maintained, and the cool air is delivered to the target area, that is, the worker.

  With this configuration, since the blower 21 that blows air is built in, the mobility of the water spray blowing device 1 is increased, and a more convenient water spray blowing device can be provided. In addition, although not shown in figure, you may link the ventilation control and water spray control of a fan.

(Embodiment 6)
Embodiment 6 of the present invention will be described with reference to FIG. The same parts as those in any of Embodiments 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, the water spray cooling system of the present invention includes a blower A23 for blowing air, a duct 15 connected to the blower A23, and a water spray blowing device connected to the duct 15 and provided at predetermined intervals. 1 is provided. In the present embodiment, the bellows duct 24 is used for connection between the blower A23 and the duct 15 or between the ducts 15. However, the bellows duct 24 may be connected, and an elbow or the like may be used.

  The water spray blowing device 1 connected to the duct 15 is provided in accordance with, for example, the distance between workers in the work zone, and the number is determined according to the number of workers. The required air volume and required static pressure are determined in accordance with the number of water spray blowing devices and the ventilation distance of the duct, and the blower is selected.

  By this structure, the water spray cooling system which can supply cooling air for every target area | region, for example for every operator can be provided.

  The water spray blowing device and the water spray cooling system using the same according to the present invention suppress the diffusion of the blown airflow including the cooling air and maintain the wind speed of the blown airflow, thereby enabling outdoor space, open space, or indoor space. Therefore, it is useful for spot cooling because it can be efficiently cooled locally.

DESCRIPTION OF SYMBOLS 1 Water spray blower 2 Air outlet 3 Bell mouth 4 Blowing air flow 5 Water spray nozzle 6 Ventilation duct 8 Water supply pipe 9 Central axis 10 Parallel direction 14 Half cracked spherical 15 Duct 17 Cone 18 Damper 19 Electric motor 20 Electric valve 21 Blower 23 Blower A
A angle B angle

Claims (9)

An air outlet for blowing air; a bell mouth provided around the outer peripheral surface of the air outlet; and a hole formed in the bell mouth to be fixed to the bell mouth so that the hole is closed. A water spray blowout device comprising a water spray nozzle that sprays water toward a blown air flow that is provided in the bell mouth and blown from the blowout port. 2. The water spray according to claim 1, wherein a plurality of water spray nozzles are provided, and an angle of spraying water from the direction parallel to the central axis of the air outlet toward the central axis is different for each of the water spray nozzles. Blowing device. The water spray blowing device according to claim 2, wherein an angle at which water is sprayed from a direction parallel to the central axis of the air outlet toward the central axis is 20 degrees to 40 degrees. The water spray blower according to any one of claims 1 to 3, wherein the blower outlet is rotatable. The water spray blowing device according to any one of claims 1 to 4, further comprising a damper that controls a blown air flow blown from the blowout port. The water spray blowing device according to any one of claims 1 to 5, wherein the control of the blown air flow by the damper and the water spray are interlocked. The water spray blowout according to any one of claims 1 to 6, wherein the relative humidity of the blown air flow after evaporation of the sprayed water is 80% relative humidity of the blown air flow immediately before being sprayed. apparatus. The water spray cooling system provided with the air blower which ventilates air, and the water spray blowing apparatus in any one of Claims 1 thru | or 7. The water spray cooling system provided with the water spray blowing device according to any one of claims 1 to 8, wherein the water spray blower is provided at every predetermined interval connected to the duct, a blower for blowing air, a duct connected to the blower, and the duct. .

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