JP2008070007A - Spraying system for lowering temperature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spraying system for lowering temperature capable of constantly releasing mist that poses no problems even if attached to a human body or clothes. <P>SOLUTION: This spraying system for lowering a temperature of an object space by spraying the water as mist, comprises a pump for pressurizing and delivering the water, a water distribution pipe connected with the pump through a main valve and communicated with a spraying head for spraying the water as mist, and a mist control panel for controlling the pump and the main valve, and the mist control panel performs pre-spraying at a prescribed clock time for a prescribed time. As the remaining water in the water distribution pipe can be released by performing the pre-spraying for the prescribed time early in the morning before the water is released in the heat of the day, the clean water can be released in automatically spraying the water according to daytime conditions of the weather. Further when a tank is utilized, a clean state can be constantly kept by replacing the water in the tank. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spraying system for lowering temperature by using a cooling action by latent heat by transpiration of mist sprayed with water to lower the ambient temperature.

  Conventionally, in a spraying system for lowering temperature that sprays water as mist to lower the temperature of a target space, a pump that pressurizes and delivers water, a main water pipe that is connected to the pump via a main valve, and the main distribution pipe A sub-distribution pipe connected to the main pipe through a selection valve and communicating with the main water pipe and a spray head for spraying water as mist; connected to the main water pipe through a drain valve; And a mist control panel for controlling the pump, the main valve, the selection valve, and the drain valve. When the mist control panel starts spraying, the mist control panel includes the main valve and the mist control panel. After opening the drain valve, the pump is operated, then the drain valve is closed, and then the selection valve is opened to distribute water to the spray head (see, for example, Patent Document 1).

In such a spray system, after the water pressure in the main water distribution pipe is once stabilized to a desired value, the water pressure of the pressurized water supplied to the spray nozzle reaches the spray water pressure in a short time by supplying water to the child water distribution pipe. The mist having a large particle size seen when sprayed at a low water pressure is hardly sprayed.
JP 2006-177777 A

  In the spray system as described above, since no large particles are generated, the mist discharged from the nozzle is completely evaporated during the descent, but a desired mist spray is always performed when dust adheres to the spray nozzle. In addition, it is also considered that the user touches the mist unnecessarily. In such a case, mist will adhere to a human body or clothes.

  Usually, in such a spray system, clean tap water is used as water to be sprayed with mist, and a water source with a strange smell or color is not used.

  However, since this spraying system for temperature reduction operates according to the weather conditions of the outside air, depending on the weather, water may not be discharged every day, and water may remain in the pipe depending on the shape of the pipe. As a result, there is a risk that the water will rot due to this retention of water.

  An object of the present invention is to provide a temperature-falling spray system capable of always discharging mist that does not cause a problem even if it adheres to a human body or clothes.

  A temperature lowering spray system according to the present invention is a temperature lowering spray system for spraying water as a mist to lower the temperature of a target space, and is connected to a pump for pressurizing and sending water through the main valve. And a mist control panel for controlling the pump and the main valve, the mist control panel having a predetermined time in advance at a predetermined time. It is characterized by spraying or pre-draining.

  The pump is configured to pressurize and feed the water in the tank, wherein the water in the tank is once drained and refilled before the pre-spraying or the pre-draining.

  The effect of the spray system according to the present invention is that the residual water in the water distribution pipe can be discharged by performing the pre-spray for a predetermined time before the mist is released in the hot peak of the daytime such as early morning. When spraying according to the weather conditions, there is an effect that the water can be discharged with clean water.

  Moreover, when using a tank, it can always be set as a clean state by changing the water of a tank.

  As a result, even if the human body or clothes touch the mist that is automatically sprayed during the day, problems such as off-flavor and coloring do not occur.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a temperature lowering spray system according to Embodiment 1 of the present invention. FIG. 2 is a plan view of the spray head according to the first embodiment. FIG. 3 is a cross-sectional view of the spray head according to the first embodiment. FIG. 4 is a cross-sectional view taken along the central axis of the spray nozzle according to the first embodiment. FIG. 5 is a configuration diagram of the pressurized water supply device. FIG. 6 is a functional block diagram of the mist control panel. FIG. 7 is a timing chart of mist spraying. 2 is a partial cross-sectional view of the spray head as viewed downward from the BB cross-section of FIG. 3 is a cross-sectional view of the spray head as viewed in the horizontal direction from the AA cross section of FIG.

As shown in FIG. 1, the spray system 1 for cooling a temperature according to the first embodiment includes a spray head 3 provided at the tips of two pillars 2 that stand vertically from the ground, and pressurized water supplied to the spray head 3. Is provided with a sub-distribution pipe 4 to which water is distributed, a pressurized water supply apparatus 5 for supplying pressurized water via the sub-distribution pipe 4, and a thermo-hygrometer 6 for measuring ambient temperature and humidity and transmitting the measured temperature and humidity to the pressurized water supply apparatus 5. . Water is supplied from the water supply 7 to the pressurized water supply device 5. In addition, although the two pillars 2 are described as an example, the number of the pillars 2 may be determined as appropriate according to the size of the facility to be cooled.
Moreover, although the spray head 3 described having been provided at the front-end | tip of the pillar standing upright from the ground, you may suspend from the ceiling.

  As shown in FIG. 2, the spray head 3 distributes the pressurized water distributed through the sub-distribution pipe 4 so that the pressure is evenly applied to the six spray nozzles 10, and the spray header 11 to the spray nozzle 10. Are formed of six extension pipes 12 provided for separating the predetermined distance, and six spray nozzles 10 for spraying by using pressurized water as a mist. And the installation height of the spray nozzle 10 is 4 m. The installation height of the spray nozzle 10 can be determined depending on the average particle size and the maximum particle size of the mist.

  Here, it is described that the six spray nozzles 10 are provided in the spray head 3, but the present invention is not limited to this, and the number of spray nozzles 10 may be one to N.

  As shown in FIGS. 2 and 3, the spray header 11 is a hexagonal column in which a hexagonal columnar cavity 15 having a central axis arranged in the vertical direction is formed. A hole 16 to which the sub-distribution pipe 4 is connected is provided at the center of the lower end surface of the hexagonal column, and the sub-distribution pipe 4 and the hexagonal column-shaped cavity 15 are communicated with each other. In addition, a hole 17 to which the extension pipe 12 is connected is provided at the center of each side surface of the hexagonal column, and the extension pipe 12 and the hexagonal columnar cavity 15 are communicated with each other. The pressurized water is poured from the holes 16 on one end face and supplied to the extension pipe 12 from the holes 17 on the six side faces. The spray header 11 is made of stainless steel.

  As shown in FIG. 3, the extension pipe 12 is a cylindrical tube, one end of which is vertically attached to the side surface of the spray header 11, is bent downward in the longitudinal direction, and the other end is the spray header 11. The central axis of the cylindrical tube is inclined so as to bow 22.5 degrees from the horizontal plane including the lower end face. The extension pipe 12 is made of stainless steel. A straight pipe 18 is attached to the other end of the extension pipe 12, and the spray nozzle 10 is fitted therein. The straight pipe 18 is made of stainless steel. Thus, the central axis of the spray nozzle 10 fitted to the straight pipe 18 is inclined downward by 22.5 degrees from the horizontal plane including the lower end face of the spray header 11.

  As shown in FIG. 4, the spray nozzle 10 has a substantially cylindrical housing 19. A section for receiving the pressurized water supplied via the extension pipe 12 along the central axis of the cylindrical housing 19 is located on the downstream side of the circular pressurized water receiving cavity 20 and the pressurized water receiving cavity 20, and the section is received by the pressurized water receiving section. A rib 21 that accommodates a circular cavity 21 smaller than the diameter of the cavity 20 and a pressure-sensitive check valve 22 and has a circular cross section larger than the diameter of the cavity 21 and the outer edge of the downstream end face protrudes in the center direction. The partitioned valve storage cavity 24 and the piece 25 are accommodated, and are formed of a circular cavity 26 having a cross section equal to the diameter of the pressurized water receiving cavity 20 and a funnel-shaped cavity 27 connected to the cavity 26. An orifice 29 connected to the tip of the jet generating cavity 28 and the funnel-shaped cavity 27 is provided continuously.

  A pressure-sensitive check valve 22 that closes / opens the opening 21 a on the downstream side of the cavity 21 is inserted into the valve storage cavity 24. When the pressure sensitive check valve 22 abuts the opening 21 a on the downstream side of the cavity 21, the blocking ball 30 that blocks the flow of pressurized water, one end contacts the blocking ball 30, and the other end is fixed to the rib 23. A spring 31 is bent so that a predetermined spring pressure is applied to the blocking ball 30.

  When the water pressure in the cavity 21 exceeds a predetermined spring pressure, the blocking ball 30 and the opening 21a of the cavity 21 are separated from each other, and water flows into the valve housing cavity 24 from the gap.

  Further, in the jet generation cavity 28, the pressure water is ejected as a swirling jet, and the piece 25 for colliding with the inner surface of the funnel-shaped cavity 27 is in contact with the inner surface of the cylindrical cavity 26, and the direction of the central axis of the spray nozzle 10 Move while sliding. A spiral groove 32 is dug in the side surface of the piece 25, and a swirl flow path for swirling and ejecting pressurized water is formed by the groove 32 and the inner surface of the cylindrical cavity 26.

  Next, a procedure for spraying pressurized water in the spray nozzle 10 will be described.

  When pressurized water is poured into the pressurized water receiving cavity 20 and the water pressure reaches a predetermined value, the blocking ball 30 is pushed and the pressurized water flows into the valve housing cavity 24.

Then, pressurized water pushes one end face of the piece 25 from the hole 23 a formed in the center of the rib 23, and the piece 25 is moved along the central axis of the spray nozzle 10 toward the funnel-shaped cavity 27. The pressurized water passes through the groove 32 while being swirled, and is jetted from the end of the groove 32.
This jet collides with the inner surface of the funnel-shaped cavity 27 to become a collision jet and is sprayed from the orifice 29 as a mist.

  Next, the sprayed mist will be described. The mist in this invention means the water droplet of a small diameter, and when the spray water pressure was 6 MPa from the spray nozzle 10, the Sauter average particle diameter was 20 micrometers. When the spray water pressure is less than 2 MPa, the average particle size of the mist increases and the spray amount decreases, resulting in a reduced cooling effect. Further, when the spray water pressure is high, the average particle diameter of the mist is reduced and the spray flow rate is increased. However, if the spray water pressure exceeds 10 MPa, a large water hammer is applied to the piping and the like, which is not preferable for safety. For these reasons, the spray water pressure is preferably 2 MPa or more and 10 MPa or less.

  Next, how the mist is sprayed will be described. In the vicinity of the orifice 29, the mist is sprayed in a cone having a center line on the central axis of the spray nozzle 10 and having the exit of the orifice 29 as a vertex. This conical region is referred to as a spray region, and the apex angle of the cone is referred to as a jet angle. Moreover, the side surface of this spray area | region is called a spray outer edge.

  In this spray region, the injection angle can be adjusted by adjusting the shape of the orifice 29. If the jet angle is reduced, the mist can be moved far away, and if the jet angle is increased, the mist drifts near the spray nozzle 10. Usually, it is preferable to set the injection angle to about 45 degrees, but it is not limited to 45 degrees. By adjusting the injection angle in this way, the spray region can be positioned below the horizontal plane that crosses the orifice 29.

  When the wind is not blowing, the surrounding air is cooled by evaporating the mist and a descending airflow is generated, so that the sprayed mist descends with the descending airflow. The mist evaporates during the descent. As the mist evaporates, latent heat is taken away from the air and the air is cooled.

  As shown in FIG. 5, the pressurized water supply device 5 includes a high pressure pump 40 connected to the water supply 7 and provided with a tank 49 therein, a main valve 41 disposed on the downstream side of the high pressure pump 40, and a main distribution pipe 42. A drain valve 43 that opens and closes a flow path for draining water, a selection valve 44 that selects supply of pressurized water to each spray head 3, a high-pressure pump 40, and a mist control panel 45 that controls various valves. The sub-distribution pipes 4 are connected to the selection valves 44, respectively. The dry bulb temperature and wet bulb temperature measured by the thermohygrometer 6 are input to the mist control panel 45.

  The main valve 41 and the selection valve 44 are communicated with each other through the main water distribution pipe 42, and the drain valve 43 is communicated with the main water distribution pipe 42 through a drain pipe 46 that branches from the middle of the main water distribution pipe 42. The main water pipe 42, the drain pipe 46, and the sub water pipe 4 are each made of stainless steel. The high pressure pump 40 and the main valve 41 are communicated with each other by a rubber blade hose 47 to smooth the pulsation generated by the positive displacement high pressure pump 40.

  Further, in order to remove dust contained in the pressurized water, a 20 μm square opening filter (not shown) is interposed at the outlet of the high-pressure pump 40.

  Further, in order to supply pressurized water with a small amount of metal ions so as not to deposit scale on the main water distribution pipe 42, the sub water distribution pipe 4, and the spray head 3, softening is performed in the tank 49 of the high-pressure pump 40 by a water softener (not shown). Tap water is supplied.

  As shown in FIG. 6, the mist control panel 45 includes a spray determining means 50 for determining whether or not spraying is possible based on the dry bulb temperature and wet bulb temperature measured by the thermohygrometer 6, and if spraying is possible, the spray amount is determined. A water supply amount control means 51 for controlling the amount of water supplied from the high-pressure pump 40, a spray sequence control means 52 for controlling the high-pressure pump 40 and various valves, and an air diagram database 53 in which wet air diagrams are stored. Have. The mist control panel 45 is composed of a computer having a CPU, a RAM, a ROM, and an interface circuit.

  Next, a sequence for supplying pressurized water from the high-pressure pump 40 will be described with reference to FIG.

  The spray sequence control means 52 of the mist control panel 45 first opens the main valve 41. At the same time, the drain valve 43 is opened.

  Next, the spray sequence control means 52 starts the operation of the high-pressure pump 40 and supplies pressurized water from the blade hose 47 to the main water distribution pipe 42. If it does so, the inside of the main distribution pipe 42 will come to apply a uniform water pressure.

  Next, the spray sequence control means 52 closes the drain valve 43. Thereby, the water pressure in the main water distribution pipe 42 reaches a desired water pressure, for example, 6 MPa.

  Next, the spraying sequence control means 52 opens the selection valve 44 connected to the spraying head 3 that performs spraying, and the pressurized water is propagated as the rising pressure wave through the sub-distribution pipe 4, and water is supplied to the spraying head 3. Is done. At this time, the water pressure applied by being poured into the pressurized water receiving cavity 20 reaches approximately 0 MPa to 6 MPa in 4 seconds. When the water pressure becomes 1 MPa or higher in this way, the pressure-sensitive check valve 22 of the spray nozzle 10 is opened and spraying of mist is started.

  On the contrary, when the spraying of the mist is finished, the spray sequence control means 52 opens the drain valve 43 so that the descending pressure wave is propagated in the child water distribution pipe 4, and the water pressure in the pressurized water receiving cavity of the spray nozzle 10 is changed. Since the pressure is reduced to 1 MPa or less, the pressure-sensitive check valve 22 is closed, and mist spraying is stopped.

  Then, after about 3 seconds from the opening of the drain valve 43, the operation of the high-pressure pump 40 is stopped and the selection valve 44 is closed. Thereafter, the main valve 41 and the drain valve 43 are closed.

  Thus, after the water pressure in the main water distribution pipe 42 is once stabilized to a desired value, the water pressure of the pressurized water supplied to the spray nozzle 10 is changed from 0 MPa to 6 MPa in several seconds by supplying water to the child water distribution pipe 4. Can change. And since the pressure sensitive check valve 22 is suddenly opened and the spraying time can be shortened when the water pressure is low, most of the mist having a large particle size seen when spraying when the water pressure is low. It is not sprayed.

  Further, when the drain valve 43 is opened, the water pressure in the main water distribution pipe 42 is suddenly lowered, the pressure sensitive check valve 22 is suddenly closed, and the spraying time in a low water pressure state can be shortened. The mist having a large particle size seen when sprayed at a low water pressure is hardly sprayed.

  In addition, when a plurality of sub-distribution pipes 4 are connected to the main distribution pipe 42, all the sub-distribution pipes 4 may be simultaneously communicated to distribute water to all the spray heads 3. As shown in FIG. 7, one selection valve 44 is first opened and spraying is started from the spray head 3 connected thereto, and then the other selection valve 44 is opened to simultaneously open the selection valve 44. From time to time, the water pressure applied to the spray nozzle 10 suddenly reaches the spray water pressure, the time during which the water pressure is low is short, and water droplets having a large diameter can be prevented from falling.

  Next, in addition to the automatic spraying based on the weather conditions as described above, a pre-spraying sequence performed in the early morning will be described. The purpose of this pre-spraying is to replace the water in the tank 49 in the high-pressure pump 40 with fresh tap water, and to replace all the previous-day water remaining in the main pipe 42 and the sub pipe 4 with new tap water.

  The spray sequence control means 52 of the mist control panel 45 starts pre-spraying at the start time. First, the water in the tank 49 is drained by opening the tank drain valve 49b for a predetermined time, and the water is supplied from the water supply 7 again. The predetermined time is set according to the capacity of the tank 49 and the like, and the time during which the water in the tank 49 can be completely drained is set. Similarly, the time required for water supply is also set according to the water supply capacity from the water supply 7. Of course, this operation is not necessary when the tap water is directly pressurized without using the tank 49 in the high-pressure pump 40.

  Next, water in the pipe is discharged from the spray nozzle 10 by a sequence as in FIG. That is, the spray sequence control means 52 first opens the main valve 41. At the same time, the drain valve 43 is opened. Next, the operation of the high-pressure pump 40 is started, and the pressurized water is supplied to the main water distribution pipe 42 so that a uniform water pressure is applied in the main water distribution pipe 42. Next, the drain valve 43 is closed. Thereby, the water pressure in the main distribution pipe 42 reaches a desired water pressure.

  Next, the spray sequence control means 52 sequentially opens the selection valves 44 connected to the spray nozzle 10 as described above, and when the water pressure in each child pipe 4 becomes 1 MPa or more, the pressure sensitive check valve of the spray nozzle 10. 22 is opened, spraying of mist is started, and each of the pipes 4 is continued for a predetermined time so that the water in the pipe 4 is discharged.

  Thereafter, in order to finish spraying the mist, the spray sequence control means 52 opens the drain valve 43 so that the descending pressure wave is propagated in the child water distribution pipe 4, and the water pressure in the pressurized water receiving cavity of the spray nozzle 10 is increased. Since the pressure is reduced to 1 MPa or less, the pressure-sensitive check valve 22 is closed, and mist spraying is stopped. Then, after the drain valve 43 is opened, the operation of the high-pressure pump 40 is stopped, the selection valve 44 is closed, and then the main valve 41 and the drain valve 43 are closed.

  In this way, in the pre-spraying, the water of the previous day remains in the main pipe 42 and each sub pipe 4, but the capacity thereof is each individual pipe, and the predetermined time required for the discharge is for each pipe. Set to

  Next, a method for setting the mist spray amount will be described. As a premise, the sprayed mist is evaporated in at least one minute.

  The spray determination means 50 calculates the relative humidity (%) based on the wet air diagram from the dry bulb temperature (° C.) and the wet bulb temperature (° C.) input from the thermohygrometer 6. Next, when the relative humidity RH is 75% or more, the spray determination unit 50 does not feel that the sensory temperature has decreased because the relative humidity is too high even if the mist is sprayed. . On the contrary, when the relative humidity RH is less than 75%, it is felt that the sensory temperature is lowered by spraying the mist, so that the mist is sprayed.

  Next, the water supply amount control means 51 determines whether or not the dry bulb temperature of the thermohygrometer 6 is equal to or higher than the hot threshold value or a slightly hot threshold value, and obtains the spray amount. That is, when the dry bulb temperature is equal to or higher than a predetermined hot threshold, for example, the mist spray amount is set to 0.0005 kg. And it can cool at 1 degreeC by spraying 0.0005 kg mist per 1 m3 in 1 minute. When the dry bulb temperature is equal to or higher than a predetermined hot threshold, for example, the amount of mist sprayed is 0.001 kg. And it can cool at 2 degreeC by spraying 0.001kg of mist per 1 m3 in 1 minute.

  In such a temperature lowering spray system 1, once the water pressure in the main water distribution pipe 42 is stabilized to a desired value, the pressure of the pressurized water supplied to the spray nozzle 10 is reduced for a short time by supplying water to the child water distribution pipe 4. Since the spray water pressure is reached, the mist having a large particle size seen when sprayed at a low water pressure is hardly sprayed.

  Also, since the mist sprayed from the orifice 29 is below the horizontal plane crossing the orifice 29, the mist hits the sub-distribution pipe 4 and so on to form a droplet, falls downward, and below the sub-distribution pipe 4 and the like It is possible to prevent the person who is present from getting wet.

  In addition, since the child water distribution pipe 4 rising from the ground is connected to the spray header 11 at the lower end face, the sprayed mist is separated from the child water distribution pipe 4 by the extension pipe 12 even if the sprayed mist flows in the wind. However, the dew condensation does not occur on the child water distribution pipe 4 or the spray header 11, and the water droplet does not fall downward.

  Further, since the spray nozzles 10 can be dispersed and arranged in a wide space by the extension pipe 12, it is possible to spray in a wide space with a small number of water distribution pipes 4. Further, since the extension pipe 12 and the spray nozzle 10 are attached to the spray header 11 in advance in the factory and the spray head 3 is connected to the sub-distribution pipe 4 at the site, the work at the site can be simplified.

  Although the extension pipe 12 has the same length and the same curvature, the example has been described. For example, the extension pipe 12 having a long length is made small and the extension pipe 12 having a short length is made a large curve. It may be. If it does in this way, mist can be sprayed more uniformly. Thus, even if the length of the extension pipe 12 and the degree of bending are different, the spray angle from the spray nozzle 10 and the center of the spray nozzle 10 are such that the spray region is below the horizontal plane including the lower surface of the spray header 11. By adjusting the inclination of the shaft from the horizontal plane, it is possible to prevent mist from condensing on the spraying head 3 and dropping water droplets.

  Further, when the extension pipe 12 can be lengthened, the inclination of the central axis of the spray nozzle 10 from the horizontal plane is reduced, and when the extension pipe 12 cannot be lengthened, the inclination of the central axis of the spray nozzle 10 from the horizontal plane. May be increased. That is, in the case of a long extension pipe 12, for example, 25 cm, by tilting the central axis of the spray nozzle 10 by 30 ° from the horizontal plane, the length of the extension pipe 12 is set to 15 cm when no drop is seen. Then, by dropping the central axis of the spray nozzle 10 by 40 ° from the horizontal plane, the drop of liquid droplets cannot be seen.

Embodiment 2. FIG.
The temperature-falling spray system according to the second embodiment of the present invention has the same configuration as the temperature-falling spray system 1 according to the first embodiment, and only the pre-spraying sequence is different.

  That is, in Embodiment 1, all the water in each child pipe 4 is discharged from the spray nozzle 10, whereas in this Embodiment 2, the drain valve 43 of the main pipe 42 is actively used. Is.

  In the second embodiment, the spray sequence control means 52 of the mist control panel 45 starts pre-spraying at the start time, and first replaces the water in the tank 49 as in the first embodiment.

  Next, the drain valve 43 of the main pipe 42 is opened, and all the selection valves 44 are opened. Thereby, the water in each child pipe 4 flows to the main pipe 42 side together with the water in the main pipe 42, and is almost discharged from the drain valve 43. And the water in piping is discharged | emitted from the spray nozzle 10 by a sequence similarly to FIG.

  The drain valve 43 is kept open for a predetermined time required to drain most of the water in the main pipe 42 and each sub pipe 4 from the drain valve 43. The water in the main pipe 42 and each sub pipe 4 remains a little because it is impossible to discharge all the water even if the arrangement of the pipes is devised to give a necessary gradient. Therefore, water is discharged from the spray nozzle 10 under the same control as in the first embodiment. In this way, by draining the water in each pipe from the drain valve 42, the predetermined time for spraying from the spray nozzle 10 can be shortened, and it is desired to release mist from the spray nozzle 10 so much even in the early morning. Effective if not.

  It should be noted that during the operation based on the weather conditions, the discharge from the spray nozzle 10 described above can be omitted and only the drainage can be performed instead of the spray, for example, when the discharge of the residual water can be short at the beginning of the mist discharge.

Embodiment 3 FIG.
The temperature-falling spray system according to the third embodiment of the present invention has the same configuration as the temperature-falling spray system 1 according to the first embodiment. However, although not shown, a second drain valve is provided at the distal end portion of the sub pipe 4. It is installed so that the water in the child pipe 4 can be drained, and only the pre-spraying sequence is different.

  That is, in the first embodiment or the second embodiment, the water in each of the sub pipes 4 is to be discharged from the spray nozzle 10, whereas in this third embodiment, the end portion of each of the sub pipes 4 The drainage valve of 2 is provided and it is going to drain from there by prior drainage instead of prior spraying.

  In the third embodiment, the spray sequence control means 52 of the mist control panel 45 starts pre-spraying at the start time, and first replaces the water in the tank 49 as in the first embodiment.

  Next, the drain valve 43 of the main pipe 42 is opened, and at the same time, all the selection valves 44 and the second drain valve (not shown) of each child pipe 4 are opened. Thereby, it becomes possible to discharge almost all of the water in each child pipe 4 together with the water in the main pipe 42.

  After most of the water in the main pipe 42 and each sub pipe 4 is discharged, the second drain valve and the selection valve 44 (not shown) are closed, and the original valve 41 is opened. Next, the operation of the high-pressure pump 40 is started to supply pressurized water to the main distribution pipe 42 so that a low-pressure water pressure is applied in the main distribution pipe 42. Next, the drain valve 43 is closed, and each selection valve 44 is opened sequentially as described above, so that each child pipe 4 is filled with water so that the water pressure does not exceed 1 MPa. Go.

  At the end, the pump is stopped and each selection valve 44 and the main valve 41 are closed.

  In this way, by filling the water in each pipe with low pressure, the water in the pipe can be replaced without discharging mist from the spray nozzle 10.

It is a block diagram of the spray system for temperature fall concerning Embodiment 1 of this invention. It is a partial cross section figure of the spray head of this invention. It is sectional drawing of this spray head. It is sectional drawing along the central axis of the spray nozzle. 1 is a configuration diagram of a pressurized water supply device according to Embodiment 1. FIG. FIG. 3 is a functional block diagram of a mist control panel according to the first embodiment. 3 is a timing chart of mist spraying controlled by the pressurized water supply apparatus according to the first embodiment.

Explanation of symbols

1 spraying system for temperature drop, 2 pillars, 3 spraying heads, 4 child distribution pipes, 5 pressurized water supply device, 6 temperature hygrometer, 7 water supply, 10 spray nozzles, 11 spraying header, 12 extension piping, 14 pressure transducer, 15 cavities 16, 17 holes, 18 straight pipes, 19 housings, 20, 21, 26, 27 cavities, 21a openings, 22 pressure-sensitive check valves, 23 ribs, 23 holes, 24 valve storage cavities, 25 pieces, 28 jet generation cavities , 29 orifice, 30 block ball, 31 spring, 32 groove, 40 high pressure pump, 41 main valve, 42 main water pipe, 43 drain valve, 44 selection valve, 45 mist control panel, 46 drain pipe, 47 blade hose, 49 tank , 50 spray determination means, 51 water supply amount control means, 52 spray sequence control means.

Claims (2)

In a spraying system for lowering the temperature of the target space by spraying water as a mist,
A water supply pipe that pressurizes and feeds water, is connected to the pump via a main valve, and communicates with a spray head that sprays water as mist, and a mist control panel that controls the pump and the main valve And comprising
The mist control panel performs a pre-spraying or pre-drainage for a predetermined time at a predetermined time.   2. The pump according to claim 1, wherein the pump pressurizes and feeds water from the tank, and drains the water from the tank and refills it before the pre-spraying or pre-draining. Spraying system for cooling down.