JP5064167B2 - Temperature drop spray system - Google Patents

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 temperature drop spraying system that sprays water as a mist to lower the temperature of a target space, a pump that pressurizes and delivers water is directly connected to the water supply. (For example, refer to Patent Document 1).

In such a spraying system, residual chlorine contained in the water supply cannot be completely removed in a place where the water quality of the water supply is not good, which adversely affects each distribution pipe and the spray nozzle.
JP 2006-177777 A

  In the spray system as described above, in a place where the water quality of tap water is not good, water containing high-concentration residual chlorine or the like damages each distribution pipe or spray nozzle.

  An object of the present invention is to provide a temperature-falling spray system capable of optimizing the quality of water for spraying even in places where the quality of tap water is not good.

A temperature lowering spray system according to the present invention includes a pump for lowering the temperature of a target space by spraying water as mist, pressurizing and feeding water supplied from a water supply, and a primary side of the pump Alternatively, a water purifier provided on the secondary side and a water distribution pipe connected to the secondary side of the pump via a main valve and communicating with a spray head for spraying water as mist, the pump and the main valve A mist control panel for controlling the water, an open / close valve provided on either the primary side or the secondary side of the water purifier, and a water level signal of the water level detection unit of the water tank of the pump. A water supply control unit, wherein the mist control panel includes an operation control unit that relays a water level lowering signal of the water level detection unit and an operation signal of the pump between the water supply control unit and the water supply control unit. The control unit Upon receiving the water level lowering signal of the water level detection unit, the on-off valve is opened to start water supply to the water storage tank, and continuously receiving a water level lowering signal of the water level detection unit of the water storage tank, and, upon receiving the operation in the signal of the pump, by the operation control unit, by operating inhibit the pump, and wherein the Rukoto is the state of the mist spray suppression.

Moreover, the spraying system for temperature fall which concerns on this invention is a spray system for temperature fall which sprays water as mist and falls the temperature of object space, the pump which pressurizes and delivers the water supplied from a water supply, 1 of this pump A water purifier provided on the secondary side or the secondary side, and a water distribution pipe connected to the secondary side of the pump via a main valve and communicating with a spray head for spraying water as mist, the pump, and the pump A mist control panel for controlling the main valve, an open / close valve provided on either the primary side or the secondary side of the water purifier, and a water level signal of the water level detection unit of the water tank of the pump. A water supply control unit for receiving, the mist control panel has an operation control unit for relaying a water level lowering signal of the water level detection unit and an operation signal of the pump between the water supply control unit, Above water supply system The unit opens the on-off valve by receiving the water level lowering signal from the water level detecting unit and starts supplying water to the water tank, and continuously receives the water level lowering signal from the water level detecting unit of the water tank. and, and, when receiving the operation in the signal of the pump, by the operation control unit, and the operation is stopped the pump, and wherein the Rukoto is the state of the mist spray stop.

The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit to start water supply to the water storage tank, and continues for a first period of time. And when the operation signal of the pump is received, the water supply is extended for a predetermined time while the open valve is opened, and the water level detection is continued for a second time longer than the first time. When the water level lowering signal is received and the operation signal of the pump is received, the remaining water prediction of the water storage tank is performed, and the operation control unit suppresses the operation of the pump and suppresses the mist spray suppression. It is a condition characterized by Rukoto.

The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit to start water supply to the water storage tank, and continues for a first period of time. And when the operation signal of the pump is received, the water supply is extended for a predetermined time while the open valve is opened, and the water level detection is continued for a second time longer than the first time. When the water level lowering signal is received and the operation signal of the pump is received, the remaining water in the water storage tank is predicted, and the operation control unit stops the pump operation to stop the mist spraying. It is a condition characterized by Rukoto.

  The effect of the spraying system for temperature drop of the present invention does not damage the water distribution pipe or the like even under use conditions where water supply conditions are not good. Moreover, even if the human body or clothes touch the mist that is automatically sprayed during the day, problems such as dirt and off-flavors 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 apparatus according to the first embodiment. FIG. 6 is a functional block diagram of the mist control panel. FIG. 7 is a timing chart of mist spraying according to the first embodiment. FIG. 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 providing in the front-end | tip of the pillar currently 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 face of the hexagonal column, and the sub-distribution pipe 4 and the hexagonal column-shaped cavity 15 communicate 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. 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 cross section that is 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 continuous with 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 decreased 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. 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.

  FIG. 5 is a configuration diagram of the pressurized water supply device according to the first embodiment of the present invention. As shown in FIG. 5, a high-pressure pump 40 connected to the water supply 7 and provided with a tank 49 therein, a float valve 48 for controlling water supply according to a tank storage amount provided in the tank 49, and a primary (upstream) side of the high-pressure pump 40. The disposed water purifier 8, the main valve 41 disposed on the secondary (downstream) side of the high-pressure pump 40, the drain valve 43 that opens and closes the flow path for draining water in the main distribution pipe 42, and each spray head 3. A selection valve 44 for selecting the supply of pressurized water to the high pressure pump 40, an operation control unit 54 for outputting a pump operation command to the high pressure pump 40, and a mist control panel 45 for controlling the main valve 41, the drain valve 43, and the selection valve 44. It is configured. 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 branched 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.

  The water purifier 8 is disposed on the primary side of the high-pressure pump 40 and removes harmful substances such as residual chlorine contained in the water supplied from the water supply 7. In addition, the water purifier 8 may be replaced with, for example, an alkali ion water conditioner belonging to an electrolytically reduced water conditioner that does not have a function of removing residual chlorine. In this case, the main water distribution pipe 42 and the like are not damaged by adjusting the pH value to an optimum value by mixing alkaline ionized water generated by electrolysis of water and acidic water.

  Moreover, the water purifier 8 always applies the water pressure to the water purifier 8, and is a tip type that is generally used for large-capacity business use, and the water purifier 8 applies the water pressure only to the water discharged from the water tap. In general, it is distinguished from a pre-stop type that is generally used for small-capacity home use. In the first embodiment, by supplying and controlling water supplied to the tank 49 by reducing and opening the float valve 48 provided in the tank 49 of the high-pressure pump 40, it is possible to cope with a first stop type water purifier. . The water purifier 8 may be provided on the secondary side of the high pressure pump 40.

  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. It has water supply amount control means 51 for calculating and controlling the amount of water supplied from the high-pressure pump 40, a high-pressure pump 40, and a spray sequence control means 52 for controlling various valves. 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 a few 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 mist, so that 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. Then, it is possible to 1 ℃ cooling by spraying a mist of 1 m ³ per 0.0005kg per 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. Then, it is possible to 2 ℃ cooling by spraying a mist of 1 m ³ per 0.001kg per 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.

  In the pre-spraying, the water in each pipe is drained from the drain valve 42 and then the water in the pipe is discharged from the spray nozzle 10 so that the predetermined time for spraying from the spray nozzle 10 can be shortened. Good.

  Although pre-drainage is not shown in the figure, a second drain valve is installed at the tip of the sub pipe 4 so that the water in the sub pipe 4 can be drained without discharging mist from the spray nozzle 10, You may replace the water in piping.

  Next, in Embodiment 1, a sequence in which water supplied from the water supply 7 is supplied to the tank 49 of the high-pressure pump 40 will be described with reference to FIG.

  At the time of mist spraying, when the water level in the tank 49 drops below a certain level after the high-pressure pump 40 starts operation, the float valve 48 is opened and water supply to the tank 49 is started. The high pressure pump 40 is stopped by a command from the operation control unit 54.

  Next, when the water level in the tank 49 recovers to a certain level or more, the float valve 48 is closed and water supply to the tank 49 is stopped. The high-pressure pump 40 is restarted in response to a command from the operation control unit 54. At this time, since there is a hysteresis between the start of water supply and the stop of water supply, the tank 49 is not full.

Embodiment 2. FIG.
FIG. 9 is a configuration diagram of a pressurized water supply apparatus according to Embodiment 2 of the present invention. The second embodiment is the same as the first embodiment except that the configuration of the pressurized water supply device 5 is different.

  As shown in FIG. 9, the high-pressure pump 40 connected to the water supply 7 and provided with a water storage tank 49 inside, the water purifier 8 disposed on the primary (upstream) side of the high-pressure pump 40, and the secondary of the high-pressure pump 40 ( A main valve 41 provided on the downstream side, an on-off valve 9 provided on the primary (upstream) side of the water purifier 8, a drain valve 43 for opening and closing a flow path for draining water in the main water distribution pipe 42, A mist control panel that has a selection valve 44 that selects supply of pressurized water to the spray head 3 and an operation control unit 54 that outputs a pump operation command to the high-pressure pump 40 and controls the main valve 41, the drain valve 43, and the selection valve 44. 45, a water supply control unit 53 that opens and closes the on-off valve 9 according to the water level information of the tank 49 of the high-pressure pump 40. 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 on-off valve 9 may be provided on the secondary (downstream) side of the water purifier 8.

  The embodiment 2 can also be used for a stop-type water purifier by including the on-off valve 9 provided on either the primary side or the secondary side of the water purifier 8, the water supply control unit 53, and the like. It becomes. The water purifier 8 may be provided on the secondary side of the high pressure pump 40.

  When the water supply control unit 53 receives a water level lowering signal from a float switch (not shown) provided in the tank 49 of the high-pressure pump 40, the water supply control unit 53 opens the on-off valve 9 and starts water supply to the tank 49. On the other hand, when the water level recovery signal of the tank 49 of the high-pressure pump 40 is received, the on-off valve 9 is closed and water supply to the tank 49 is stopped. In addition, when the water level does not recover even after a predetermined time has elapsed after receiving the water level lowering signal of the tank 49 and starting the water supply, the water supply control unit 53 predicts the remaining water in the tank 49 and controls the water reduction alarm. To the unit 54. The water supply control unit 53 may be provided in the mist control panel 45.

  The operation control unit 54 outputs a pump operation command for the high-pressure pump 40, and outputs a pump operation suppression command to the high-pressure pump 40 when receiving a water reduction alarm from the water supply control unit 53. In addition, the operation control unit 54 outputs pump operation information such as an operation signal of the high-pressure pump 40 to the water supply control unit 53.

  Next, in Embodiment 2, the sequence in which the water supplied from the water supply 7 is supplied to the tank 49 of the high-pressure pump 40 will be described with reference to FIG.

  First, a timing chart of the operation of the water supply control unit 53 extending the water supply time after the water supply control unit 53 opens the on-off valve 9 and starts supplying water to the tank 49 is shown in (1).

  When the mist is sprayed while the high-pressure pump 40 is in operation and the water in the tank 49 decreases by a certain amount and receives a water level lowering signal, the water supply control unit 53 opens the on-off valve 9 and starts supplying water to the tank 49.

  Next, the water supply control unit 53 detects a drop in the water level even when the tank 49 continues to supply water for the first time (T1) and the high-pressure pump 40 is in operation (mist spray). Medium), the on-off valve 9 remains open and the water supply is extended for a predetermined time (Te). Thereby, water supply is continued until the tank 49 becomes full.

  Second, when the water supply control unit 53 extends the water supply and the tank 49 does not recover the lowered water level, the water supply control unit 53 further extends the water supply, and the operation control unit 54 controls the mist spray suppression or mist spraying. A timing chart of the operation for instructing the pause is shown in (2).

  The water supply control unit 53 receives a signal indicating that the high-pressure pump 40 is in operation (during mist spraying) and starts supplying water to the tank 49 for a second time (T2) longer than the first time (T1). ) When the water level lowering signal is continuously received, the remaining water in the tank 49 is predicted and a water reduction alarm is output to the operation control unit 54. As a result, the operation control unit 54 outputs a pump operation suppression command to the high-pressure pump 40 to cause the high-pressure pump 40 to be in the operation stop (mist spray stop) or intermittent operation (mist spray suppression) state. Further, the water supply control unit 53 extends the water supply for a predetermined time (Te ′) while the on-off valve 9 remains open.

Next, the water supply is stopped after a predetermined time, and the operation control unit 54 outputs a command to cancel pump operation suppression to the high-pressure pump 40. As a result, the operation of the high-pressure pump 40 and the mist spraying are restored to the normal state.

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 the spray head of this invention. 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. It is a functional block diagram of the mist control panel of this invention. 3 is a timing chart of mist spraying controlled by the pressurized water supply apparatus according to the first embodiment. 3 is a timing chart of an operation of supplying water supplied from the water supply of Embodiment 1 to a high-pressure pump. 6 is a configuration diagram of a pressurized water supply device according to Embodiment 2. FIG. 6 is a timing chart of an operation of supplying water supplied from the water supply of Embodiment 2 to a high-pressure pump.

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, 8 water purifier, 9 on-off valve, 10 spray nozzle, 11 spray header, 12 extension piping , 14 Pressure transducer, 15 cavities, 16, 17 holes, 18 Straight pipe, 19 Housing, 20, 21, 26, 27 Cavities, 21a Opening, 22 Pressure-sensitive check valves, 23 Ribs, 23 holes, 24 Valve cavities , 25 pieces, 28 jet generation cavity, 29 orifice, 30 blocking 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 Piping, 47 blade hose, 48 float valve, 49 tank, 50 spray determination means, 51 water supply amount control means, 52 spray sequence control means, 53 water supply control section, 54 operation control section.

Claims (4)

In a spraying system for lowering the temperature of the target space by spraying water as a mist,
A pump that pressurizes and feeds water supplied from the water supply, a water purifier provided on the primary side or the secondary side of the pump, and a secondary valve connected to the secondary side of the pump via a main valve, and mists the water. As a water distribution pipe communicating with a spray head for spraying, a mist control panel for controlling the pump and the main valve, and provided on either the primary side or the secondary side of the water purifier to allow water to pass through. An on-off valve, and a water supply control unit that receives a water level signal of a water level detection unit of the water tank of the pump ,
The mist control panel has an operation control unit that relays the water level lowering signal of the water level detection unit and the operation signal of the pump between the water supply control unit,
The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit to start water supply to the water storage tank, and continuously continues for a predetermined time to lower the water level of the water level detection unit of the water storage tank. receiving a signal, and, when receiving the operation in the signal of the pump, cooling spray system by the operation control unit, by operating inhibit the pump, characterized in Rukoto is the state of the mist spray suppression. In a spraying system for lowering the temperature of the target space by spraying water as a mist,
A pump that pressurizes and feeds water supplied from the water supply, a water purifier provided on the primary side or the secondary side of the pump, and a secondary valve connected to the secondary side of the pump via a main valve, and mists the water. As a water distribution pipe communicating with a spraying head for spraying, a mist control panel for controlling the pump and the main valve, and provided on either the primary side or the secondary side of the water purifier, water is passed. An on-off valve, and a water supply control unit that receives a water level signal of a water level detection unit of the water tank of the pump,
The mist control panel has an operation control unit that relays the water level lowering signal of the water level detection unit and the operation signal of the pump between the water supply control unit,
The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit to start water supply to the water storage tank, and continuously continues for a predetermined time to lower the water level of the water level detection unit of the water storage tank. When the signal is received and the operation signal of the pump is received, the operation control unit stops the operation of the pump so that the mist spray is stopped . The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit and starts water supply to the water storage tank, and continuously receives a water level lowering signal from the water level detection unit for a first time. When the pump operating signal is received, the water supply is extended for a predetermined time while the open valve is open, and continuously for a second time longer than the first time. When the water level lowering signal is received and the pump operating signal is received, the remaining water prediction of the water storage tank is performed, and the operation control unit suppresses the operation of the pump, and the state of mist spray suppression. claim 1 Symbol placement cooling spray system, characterized in Rukoto is. The water supply control unit opens the on-off valve upon reception of a water level lowering signal from the water level detection unit and starts water supply to the water storage tank, and continuously receives a water level lowering signal from the water level detection unit for a first time. When the pump operating signal is received, the water supply is extended for a predetermined time while the open valve is open, and continuously for a second time longer than the first time. When the water level lowering signal is received and the operation signal of the pump is received, the remaining water in the water storage tank is predicted, and the operation control unit stops the operation of the pump to stop the mist spraying state. cooling spray system according to claim 2, wherein Rukoto is.