JP2008304086A - Atomization system for temperature fall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an atomization system for temperature fall capable of lowering an atmosphere temperature in a space blocked from the outside air without badly affecting water droplet-avoiding work while saving energy. <P>SOLUTION: In this atomization system for temperature fall, for lowering a temperature of a work section defined at a part of a building having a large space inside, the cold air by transpiration of dry mist atomized by one fluid method from a spray nozzle disposed on an upper part of a region adjacent to the work section through piping, falls and the cold air falling and reaching a floor of the building spreads in the work section, thus the temperature of the work section is lowered. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spray system for lowering temperature by using a cooling action by latent heat due to mist evaporation to reduce the temperature of a partitioned work area having a large space.

In general, a workshop in a factory that manufactures large equipment such as vehicles and ships has a high ceiling and a large volume. And if the building of a large space is well ventilated with the outside air, the fluidity of the air inside the building is good, so the inside of the building will be cool to some extent even in summer, and will not be as hot as it is outdoors. However, in buildings where work such as welding is performed, natural ventilation is performed on the ceiling of the building and is generated by welding in order to prevent water droplets and dust from being taken into the work place in order to maintain the welding environment. Although the gas is exhausted locally, the atmosphere in the workplace is not forcibly ventilated. Thus, in a work place where the fluidity of the atmosphere is not good, the temperature of the summer work area becomes 36 ° C. to 40 ° C. In addition, in welding work, protective clothing and face masks must be worn throughout the body for safety protection, and when combined with a high-temperature atmosphere, workers are sweated throughout the work, and improvement of the work environment is required. .
In order to improve the working environment, a fan is installed to lower the temperature.
In addition, multiple nozzles are installed in the cooling space, suction ports are placed in areas where there are no nozzles, a part of the atmosphere in the space is sucked with a suction fan, dehumidified with a dehumidifier, and then cooled with a cooler. Then, it returns to the space from the air supply port (for example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 11-252663

However, even if the atmosphere is circulated by an electric fan, there are problems that the protective temperature and the face tool are worn, so that there is little effect of lowering the sensible temperature of the worker, and dust and the like are scattered.
In addition, when the entire work space in a large space is to be cooled with an air conditioner, a large amount of electric power must be consumed, which causes a problem that the cost is very high.

  An object of the present invention is to provide a spraying system for lowering the temperature, which is energy-saving and reduces the temperature of the atmosphere of a closed space from the outside air without affecting the work that dislikes water droplets.

  A spraying system for cooling according to the present invention is a spraying system for cooling a temperature which lowers a work section provided in a part of a building having a large space inside, and a pipe is provided above a portion adjacent to the work section. The cold air generated by the evaporation of dry mist sprayed from the spray nozzle arranged in a one-fluid system falls, and the cold air that descends and reaches the floor of the building spreads to the work section and cools the work section. .

  The effect of the temperature lowering spray system according to the present invention is that the mist is sprayed from a predetermined upper portion adjacent to the work section, and the cold air generated by the evaporation of the sprayed mist descends to the floor and descends to the floor. The cold air spreads into the adjacent work compartment and cools the work compartment, so the space where the cold air mainly flows is from the space where the mist is sprayed to the predetermined height of the work compartment via the space directly below that space. It is possible to cool the work section efficiently.

Embodiment 1 FIG.
FIG. 1 is a conceptual diagram of a building in which a temperature lowering spray system according to Embodiment 1 of the present invention is arranged. 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 sectional view taken along the central axis of the spray nozzle according to the first embodiment. FIG. 5 is a diagram illustrating a state in which mist is sprayed from the spray nozzle. FIG. 6 is a configuration diagram of the pressurized water supply device. FIG. 7 is a functional block diagram of the mist control panel. FIG. 8 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.

  In the building 1 in which the spraying system for temperature reduction according to Embodiment 1 according to the present invention is arranged, the height of the ceiling 2 is 20 m, and the floor 3 surrounded by the side walls is 30 m × 50 m. A work section 4 of 10 m × 20 m is set at the center of the floor 3. Since welding work is performed in the work section 4, the generation of water droplets is strictly prohibited above the work section 4, and an exhaust duct (not shown) is installed in the vicinity of the welding work so that dust does not fly. The gas generated by the welding work sucked by the exhaust duct is discharged outside the building.

In the spray system for cooling temperature according to the first embodiment of the present invention, the spray head 5 disposed between the ceiling 2 and the floor 3 at an appropriate location adjacent to the work section 4 and the pressurized water supplied to the spray head 5 are provided. The sub-distribution pipe 6 to be distributed, the pressurized water supply device 7 for supplying pressurized water via the sub-distribution pipe 6, the temperature and humidity near the worker in the work section 4 are measured and transmitted to the pressurized water supply device 7 8 in total. Water is supplied from the water supply 9 to the pressurized water supply device 7.
In the following description, one spray head 5 will be described as an example. However, the number may be appropriately determined according to the size of the work section 4 and disposed at an appropriate location adjacent to the work section 4.
Moreover, although the spray head 5 demonstrates hanging from the ceiling 2, you may provide in the front-end | tip of the pillar standing upright from the ground.

As shown in FIG. 2, the spraying head 5 distributes the pressurized water distributed through the sub-distribution pipe 6 so that the pressure is uniformly applied to the six spraying nozzles 10, and the spraying nozzles 10 are predetermined from the spraying headers 11. The six extension pipes 12 provided for the separation of the distance, and the six spray nozzles 10 for spraying by using pressurized water as a mist. The installation height of the spray nozzle 10 is approximately 10 m at the center position of the height to the ceiling 2. The installation altitude of the spray nozzle 10 is determined depending on the average particle size and the maximum particle size of the mist, but the height at which the mist sprayed from the spray head 5 does not reach the floor 3 and completely evaporates. It is preferable that the airflow that has completely evaporated and cooled down flows into the work section 4.
Here, it is described that the six spray nozzles 10 are provided in the spray head 5, 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 6 is connected is provided at the center of the upper end face of the hexagonal column, and the outer side and the hexagonal columnar 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 outside and the hexagonal columnar cavity 15 communicate 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 tilted from the horizontal plane including the lower end face thereof so as to bow at an angle θ22.5 degrees. 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. Note that the water pressure applied to the pressurized water receiving cavity 21 of the spray nozzle 10 with a pressure converter (model PVD-100ka, measuring range 0 to 10 MPa) 14 branched from one straight pipe 18 is attached. Is measured and used as the spray water pressure. Usually, the relationship between the spray water pressure and the output water pressure of the high-pressure pump is obtained in advance, and the spray water pressure is managed by managing the output water pressure of the high-pressure pump. A Bourdon tube pressure gauge or the like may be used for measuring the water pressure. The straight pipe 18 is made of stainless steel.
The central axis of the spray nozzle 10 thus connected is inclined downward by an angle θ22.5 degrees from a 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 20. Then, along the central axis of the cylindrical housing 20, a two-stage cylindrical pressurized water receiving cavity 21 in which the upstream diameter that receives the pressurized water supplied from the extension pipe 12 is larger than the downstream diameter, a pressure sensitive check The valve 22 is housed, the valve housing cavity 24 is larger than the downstream diameter of the pressurized water receiving cavity 21, and the outer edge is partitioned by a rib 23 protruding at one end in the central axis direction. A jet flow generating cavity 28, which is located on the downstream side and includes a cylindrical cavity 26 having the same diameter as the upstream side of the pressurized water receiving cavity 21 and a funnel-shaped cavity 27 connected to the cavity 26, and an orifice connected to the tip of the funnel-shaped cavity 27 29 are provided continuously.

A pressure-sensitive check valve 22 that opens and closes an opening 21 a on the downstream side of the pressurized water receiving cavity 21 is inserted into the valve housing cavity 24.
When the pressure-sensitive check valve 22 abuts the opening 21 a on the downstream side of the pressurized water receiving cavity 21, a blocking ball 30 that blocks the flow of pressurized water, and one end abuts the blocking ball 30, and a predetermined spring pressure is applied to the blocking ball 30. The other end of the spring 31 is fixed to the rib 23. The spring constant of the spring 31 is set so that the predetermined spring pressure separates the blocking ball 30 and the opening 21a of the pressurized water receiving cavity 21 when the water pressure in the pressurized water receiving cavity 21 reaches 1 MPa. If the predetermined spring pressure is set low, it takes a long time to reach a high pressure when separated and water droplets having a large diameter are sprayed. Further, if the predetermined spring pressure is close to the spray water pressure, the blocking ball 30 cannot be sufficiently separated from the opening 21a, so that the amount of water is restricted. For this reason, the predetermined spring pressure is preferably 0.4 to 1.5 MPa.

  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 21 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. The average particle diameter of the mist is the body area average particle diameter (referred to as the Sauter average diameter) measured by a laser diffraction method at a location 50 mm away from the tip of the orifice 29 on the central axis of the spray nozzle 10. In the laser diffraction method, a laser diffraction particle size measuring device (manufactured by Malvern Instruments, master size-S type, laser used: He-Ne laser) was measured in the same manner five times, and the average value was the average particle size of mist It is used as.
When the spray water pressure was 6 MPa from the spray nozzle 10 used in Embodiment 1, the Sauter average particle size was 20 μm. If the spray water pressure is low, the average particle size of the mist increases and the spray flow rate decreases, resulting in a reduced cooling effect. Further, if 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 is too high, a large shock wave is applied to the piping and the like, which is not preferable for safety. For these reasons, the spray water pressure is preferably between 2 MPa and 10 MPa. The average particle size of the mist is measured using a laser diffraction particle size measuring device, but may be measured using a Doppler phase particle size measuring device or the like. At this time, since the average particle size varies depending on the type of measuring instrument, it is necessary to measure and compare mist sprayed under the same conditions. For example, the 90% volume particle size of the mist sprayed when the spray water pressure is 6 MPa from the spray nozzle 10 was 60 μm, and the 10% volume particle size was 3 μm.

  Next, how the mist is sprayed will be described. As shown in FIG. 5, the mist is sprayed in a cone having a center line on the central axis of the spray nozzle 10 in the vicinity of the orifice 29 and having the exit of the orifice 29 as a vertex. The sprayed mist evaporates, and the mist evaporates to cool the surrounding air and generate a descending airflow. Therefore, 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.

The cooled air reaches the floor 3 as a descending airflow and spreads to the adjacent work section 4. The expanding cool air mixes with the warm air in the work section 4 and the temperature in the work section 4 decreases.
In FIG. 1, a cooling down air flow is generated along the right side wall surface of the building 1, flows horizontally on the floor 3, and the environment is improved due to the decrease in the temperature of the sensible temperature due to the air flow in the work section 4. It will also cause convection.
Since the temperature / humidity meter 8 is installed in the work section 4, mist is sprayed while it is at a predetermined temperature and humidity.

  As shown in FIG. 6, the pressurized water supply device 7 includes a high pressure pump 40, a main valve 41 disposed on the downstream side of the high pressure pump 40, and a drain valve 43 that opens and closes a flow path for draining water in the main distribution pipe 42. A selection valve 44 that selects the supply of pressurized water to the spray head 5, a high-pressure pump 40, and a mist control panel 45 that controls various valves. The selection valve 44 is connected to the child water distribution pipe 6. The dry bulb temperature and wet bulb temperature measured by the thermohygrometer 8 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 6 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 that scale does not deposit on the main water distribution pipe 42, the sub water distribution pipe 6, and the spray head 5, softened water is supplied to the high-pressure pump 40 from a water softener (not shown). Has been.

  As shown in FIG. 7, 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 8, 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 turns on the high-pressure pump 40 and supplies pressurized water from the blade hose 47 to the main water distribution pipe 42. As a result, the air remaining in the main water distribution pipe 42 is pushed out together with the water from the drain valve 43, and a uniform water pressure is applied in the main water distribution pipe 42.
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 spray sequence control means 52 opens the selection valve 44 connected to the spray head 5 that performs spraying, and pressurized water is supplied to the spray head 5 via the sub-distribution pipe 6. At this time, the water pressure applied by being injected into the pressurized water receiving cavity 21 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.

Conversely, when mist spraying is terminated, the spray sequence control means 52 opens the drain valve 43 to reduce the water pressure in the main water distribution pipe 42. Then, since the water pressure in the pressurized water receiving cavity 21 is reduced to 1 MPa or less, the pressure sensitive check valve 22 is closed and the mist spraying is finished.
Then, after about 3 seconds from the opening of the drain valve 43, the high-pressure pump 40 is turned off 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 6. 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.

Next, a method for setting the spray amount of mist will be described with reference to FIGS.
As a premise, the sprayed mist is evaporated in at least one minute. The mist sprayed from the tip of the extension pipe 12 is determined to be present within 1 m ³ and determines the spray amount.
The spray determination means 50 calculates the relative humidity RH (%) based on the wet air diagram from the dry bulb temperature DT (° C.) and the wet bulb temperature WT (° C.) input from the thermohygrometer 8. For example, as shown in FIG. 9, when the dry bulb temperature DT is 30 ° C. and the wet bulb temperature WT is 20 ° C., the wet bulb temperature WT shown on the horizontal axis of the wet air diagram is vertically 20 ° C. A dew point DP that extends in the axial direction and intersects the line with a relative humidity of 100% is obtained. The absolute humidity AH (kg / kg ′) is obtained by extending from the dew point DP in the horizontal axis direction. In the example shown in FIG. 9, the absolute humidity AH is 0.015 (kg / kg ′). Further, an intersection B between a line extending in the horizontal axis direction from the dew point DP and a line in which the dry bulb temperature DT expressed in the horizontal axis of the wet air diagram is extended from 30 ° C. in the vertical axis direction is obtained. . Then, the relative humidity RH (%) at which the intersection point B intersects is obtained. In the case of FIG. 9, the relative humidity RH is 65%.

  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 has a hot threshold value HHT _TH (shown by a thick alternate long and short dash line in FIGS. 9 and 10) or a slightly hot threshold value LHT _TH (FIG. 9). In FIG. 10, it is indicated by a thick dotted line.) Whether or not the above is determined, the spray amount is obtained. That is, as shown in FIG. 9, when the dry bulb temperature DT is equal to or higher than a predetermined hot threshold LHT _TH , based on the wet air diagram, an isoenthalpy line at which the intersection B intersects and the dry bulb temperature DT are 1 ° C. An intersection point C with a line extending in the vertical axis direction from a low temperature is obtained. Then, the absolute humidity AH ′ (kg / kg ′) is obtained by extending from the intersection C in the horizontal axis direction. Then, the absolute humidity AH ′ is subtracted from the absolute humidity AH ′ to obtain the mist spray amount JW (kg). This spray amount JW is an amount that can lower the temperature by 1 ° C. by spraying in a space of 1 m ³ per minute. In FIG. 9, since the absolute humidity AH is 0.015 (kg / kg ′) and the absolute humidity AH ′ is 0.0155 (kg / kg ′), the mist spray amount JW is 0.0005 (kg). It becomes. Then, it is possible to 1 ℃ cooling by spraying a mist of 1 m ³ per 0.0005 (kg) per minute.

Further, as shown in FIG. 10, when the dry bulb temperature DT is equal to or higher than a predetermined hot threshold value HHT _{TH, a} temperature 2 ° C. lower than the dry bulb temperature DT and the enthalpy line at which the intersection E intersects based on the wet air diagram. The intersection point F with the line extending in the vertical axis direction from is obtained. Then, the absolute humidity BH ′ (kg / kg ′) is obtained by extending from the intersection point F in the horizontal axis direction. Then, the absolute humidity BH ′ is subtracted from the absolute humidity BH ′ to obtain the mist spray amount JW (kg). In FIG. 10, since the absolute humidity BH is 0.0198 (kg / kg ′) and the absolute humidity BH ′ is 0.0208 (kg / kg ′), the mist spray amount JW is 0.001 (kg). Become. Then, it is possible to 2 ℃ cooling by spraying a mist of 1 m ³ per 0.001 (kg) per minute.

In such a temperature lowering spray system, the mist is sprayed from a predetermined upper position adjacent to the work section 4, and the cold air generated by the evaporation of the sprayed mist descends to the floor as a downward flow. Since it spreads into the adjacent work section 4 and cools the inside of the work section 4, the space through which the cold air flows mainly passes from the space where the mist is sprayed to the predetermined height of the work section 4 via the space immediately below the space. Only the space up to this point, and the inside of the work section 4 can be efficiently cooled.
Since the air is directly cooled by the transpiration action of the mist, the work space 4 can be cooled with about 1/30 of the power consumption of the air conditioner.

In addition, since the space for spraying mist is adjacent to the work section 4 but not above, even if an abnormality occurs in the spraying, the droplets do not drop into the work section 4 and adversely affect the welding operation. Never give.
In addition, since the cool air convects naturally rather than compulsorily, there is no fear of dust scattering and the welding operation is not adversely affected.
In the first embodiment, the mist is discharged from the spray head 5, but it is not always necessary to use the header 11 or the like. For example, one horizontal pipe is installed on the upper inner wall surface of the building 1. Then, a predetermined number of branch pipes such as the extension pipe 12 may be branched from the horizontal pipe, and a nozzle similar to the spray nozzle 10 may be installed at the tip of each branch pipe to discharge the mist. Thereby, it can be set as simple piping with few protrusion amounts from a wall surface.

Embodiment 2. FIG.
FIG. 11 is a conceptual diagram of a building where a temperature lowering spray system according to Embodiment 2 of the present invention is arranged.
The spraying system for temperature drop according to Embodiment 2 according to the present invention is different in that a blower 60 as suction means is added to the spray system for cooling temperature according to Embodiment 1, and the rest is the same. The same reference numerals are given to the portions, and the description is omitted.
The blower 60 is disposed at a point-symmetrical position with respect to the position where the mist is sprayed with respect to the center of the work section 4, and the start / stop of operation is controlled by the mist control panel 45.
The mist control panel 45 starts the operation of the blower 60 when the mist spraying is started, and stops the operation of the blower 60 when the mist spraying is stopped.
When the operation of the blower 60 starts, the air in the work section 4 is sucked and blown backward. Then, since the cold air due to the mist evaporating is drawn into the work section 4, the cold air due to the mist evaporating gathers in the work section 4 more intensively. As a result, the amount of mist sprayed can be saved, and the work section 4 can be cooled with energy saving.
In addition, although the air in the work section 4 is sucked in and discharged to the rear by the blower 60, the blower 60 as an extruding means may be arranged on the floor 3 where cool air due to mist evaporates descends. By disposing the blower 60 at this position, it is possible to concentrate the cold air descending into the work section 4.

Embodiment 3 FIG.
FIG. 12 is a conceptual diagram of a building where a temperature lowering spray system according to Embodiment 3 of the present invention is arranged.
The spray system for temperature drop according to Embodiment 3 according to the present invention is different from the spray system for temperature drop according to Embodiment 1 in that a ventilation fan 61 and a temperature / humidity meter 62 as outside air intake means are added. Since it is the same, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.
The ventilation fan 61 is disposed on the ceiling 2 of the building 1, and the start / stop of operation is controlled by the mist control panel 45.
The mist control panel 45 receives the temperature and humidity of the outside air measured by the temperature and humidity meter 62, and operates the ventilation fan 61 when the relative humidity of the outside air is lower than the relative humidity in the work section 4 by a predetermined value. Capture in 1.
When the relative humidity is equal to or higher than a predetermined value, the spraying of mist is stopped. However, when the ventilation fan 61 takes outside air having a lower relative humidity than the atmosphere in the building 1 into the building 1, the relative humidity in the building 1 is lowered. The spraying of mist can be continued and the work section 4 can be cooled more.

It is a conceptual diagram of the building where the spraying system for temperature fall by Embodiment 1 which concerns on this invention is arrange | positioned. 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. It is a figure showing a mode that mist is sprayed from a spray nozzle. It is a block diagram of a pressurized water supply apparatus. It is a functional block diagram of a mist control panel. It is a timing chart of mist spraying. It is a wet air diagram in which the value for determining the amount of spraying was entered. It is a moist air diagram in which the value for determining the amount of spraying was filled in under other conditions. It is a conceptual diagram of the building where the spraying system for temperature fall by Embodiment 2 which concerns on this invention is arrange | positioned. It is a conceptual diagram of the building where the spraying system for temperature fall by Embodiment 3 which concerns on this invention is arrange | positioned.

Explanation of symbols

  1 Building, 2 (Building) ceiling, 3 (Building) floor, 4 Working section, 5 Spray head, 6 Child distribution pipe, 7 Pressurized water supply device, 8 Thermo-hygrometer, 9 Water supply, 10 Spray nozzle, 11 Spray header , 12 Extension pipe, 14 Pressure transducer, 15 Cavity, 16, 17 hole, 18 Straight pipe, 19 Bend pipe, 20 Housing, 21 Cavity, 21a Opening, 22 Pressure-sensitive check valve, 23 Rib, 23a hole, 24 Valve Storage cavity, 25 pieces, 26, 27 cavity, 28 Jet generation cavity, 29 Orifice, 30 Blocking ball, 31 Spring, 32 groove, 34 Spray area, 35 Spray angle, 36 Spray outer edge, 40 High pressure pump, 41 Original valve, 42 Main distribution pipe, 43 Drain valve, 44 Select valve, 45 Mist control panel, 46 Drain pipe, 47 Blade hose, 50 Spray judgment means, 51 Water supply control means, 52 Spray Sequence control means 53 psychrometric chart database 60 blower, 61 ventilation fan, 62 thermo-hygrometer.

Claims (3)

A temperature drop spraying system for lowering the temperature of a work section provided in a part of a building having a large space inside,
The cold air drops due to evaporation of dry mist sprayed by a one-fluid system from a spray nozzle disposed on the upper part of a location adjacent to the work section, and then reaches the floor of the building. A cooling system for cooling, wherein cold air spreads over the working section and cools the working section.   2. The temperature lowering spray system according to claim 1, further comprising: suction means for sucking cold air reaching the floor of the building so as to flow in a concentrated manner in the work section or extruding means for extruding.   3. The temperature lowering spray system according to claim 1, further comprising an outside air intake unit that takes the outside air into the building when the relative humidity of the outside air is lower than the relative humidity of the work section by a predetermined value.

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