JP5490485B2 - Replacement ventilation equipment for large space rooms - Google Patents

Description

  The present invention relates to a replacement ventilation facility suitable for a large space room in which a large apparatus having a height exceeding 5 m, for example, is installed.

  For example, in order to perform precise assembly and adjustment of large machines such as metal processing machines with high accuracy, the large space room where the large machines are installed is accurately air-conditioned, creating a uniform temperature environment that is not affected by thermal expansion. I need it. Further, when the measurement position of an ultrasonic measuring instrument or the like is at a high position, a processing environment that does not cause an error due to temperature in the measurement value is required so as not to be affected by the temperature of the surrounding air. Furthermore, there are facilities that dislike the generation of airflow, such as a printing factory where each processing step is arranged in the vertical direction.

  Here, as a ventilation system of a large floor space such as a factory or an indoor parking lot, as shown in Japanese Patent Application Laid-Open Nos. 2001-349877, 2007-192530, and 3,601,611, etc. 2. Description of the Related Art A deliberate ventilation system (mixed air conditioning) that performs ventilation with a blown airflow is known.

  On the other hand, in a building with a high ceiling such as a factory or a warehouse, for example, Japanese Patent Laid-Open No. 6-185780, Japanese Patent Laid-Open No. 2007-292365, and Japanese Patent No. 4006196 are known as those that efficiently air-condition a living space formed below. A replacement ventilation system shown in a publication or the like is known. In this replacement ventilation system, air having a temperature lower than room temperature is supplied to the living space at a slow air supply speed, and the air heated and raised in the room is exhausted together with pollutants above the living space. .

JP 2001-349487 A JP 2007-192530 A Japanese Patent No. 3606011 JP-A-6-185780 JP 2007-292365 A Japanese Patent No. 4006196

  However, the delicate ventilation system that ventilates with a blown airflow has a drawback of giving a draft feeling to a person. In addition, in a large space room where the air-conditioning target area is formed to a height of 7 m or more from the floor surface, in order to make the air-conditioning target area a uniform temperature environment in the vertical direction, the air velocity is increased and stirring by the induced airflow is performed. However, if it does so, temperature fluctuations will occur in the upper and lower parts of the airflow and in the airflow transfer process, which will adversely affect the processing accuracy. Moreover, in order to avoid suspending the attracting fan from a high ceiling to a low position, it is necessary to examine the installation position of the attracting fan.

  In replacement ventilation systems, the speed of low-temperature air that supplies low-temperature air into an air-conditioned space is reduced as much as possible. However, the smaller the blowing speed of the low temperature air, the larger the air supply device and the large air supply area are required in order to obtain a predetermined air supply amount. It is difficult to secure a place for installing a large air supply device. Furthermore, when there is a device or facility that generates heat in the vertical direction, there is a concern that cold air rises quickly in the vicinity and is consumed.

  An object of this invention is to provide the replacement ventilation equipment suitable for a large space room.

According to the present invention, there is a replacement ventilation facility for a large space room in which an air-conditioning target area is formed to a height of 7 m or more from the floor surface, and at least 80% of the air-conditioning target area is located on the side of the large space room. Up to a height, an air supply surface for supplying air into the large space room is formed continuously in the vertical direction, and an intake surface for sucking air in the large space room is formed above the air conditioning target area, The air supply surface is provided with a plurality of air supply ports distributed, and the air conditioning non-target region above the air conditioning target region is provided with an outside air supply port facing the air intake surface. A replacement ventilation system for a large space room is provided, wherein an exhaust port is provided at a position closer to the center than the air port .

  To the side of the large space room, air in the large space room is sucked in the air conditioning non-target area and the temperature is adjusted, and then the temperature-controlled air is circulated and supplied to the air conditioning target area. A plurality of air devices may be arranged side by side, and a passage through which a person can pass may be formed inside the heat exchange chamber provided in the air supply device. Further, the bottom surface of the heat exchange chamber may be inclined so as to be lowered toward the side wall surface of the large space chamber, and the drain pan may also be used.

  In addition, in order to circulate and supply the temperature-controlled air to the air-conditioning target area, after the air in the large-sized space room is sucked in the air-conditioning non-target area and the temperature is adjusted to the side of the large space room A plurality of the air supply devices may be arranged side by side, and a passage through which a person can pass may be formed inside the air blowing chamber provided in the air supply device.

  Further, a rectifying plate provided with a plurality of air supply ports distributed on the supply surface may be attached, and a resistance member serving as a supply air resistance may be attached to a lower portion of the rectification plate.

According to the present invention, by supplying air from an air supply surface continuously formed in the vertical direction up to a height of at least 80% of the air-conditioning target area, the air temperature is reduced by reducing power consumption in the vertical direction. The entire target area can be air-conditioned to a substantially uniform temperature, and a temperature environment suitable for precise assembly and adjustment of a large machine can be obtained. In addition, when air is blown out from a plurality of air supply ports provided distributed on the air supply surface, an attracting action in which the air in the air-conditioning target area is attracted and moves together works. If fins are attached to each of the plurality of air supply ports distributed on the air supply surface, a swirling component is given to the air supplied from each air supply port, and the air conditioning target is attracted to the air supply The amount of air attraction (attraction ratio) in the region can be increased. As the amount of attraction increases in this way, the speed of air supply is reduced according to the law of conservation of momentum, and the speed is quickly reduced. As a result, the entire area to be air-conditioned can be maintained at a uniform temperature with a small air volume. Moreover, with the increase in the amount of attraction, it becomes possible to further reduce the upper and lower temperature difference in the air conditioning target area.

It is explanatory drawing of the large sized space room provided with the replacement | exchange ventilation equipment concerning embodiment of this invention. It is an inner side view of a large-sized space room. It is explanatory drawing of an air supply surface. It is a front view of a baffle plate. It is a front view of the air supply opening | mouth which attached the fin so that the turning component of a counterclockwise rotation direction might be given to supply air seeing from the inner side of a large sized space room. It is a front view of the air supply opening | mouth which attached the fin so that the turning component of the clockwise rotation direction might be given to supply air seeing from the inner side of a large sized space room. It is an inner side view of a large-sized space room which shows the state which attached the baffle cloth used as the resistance of supply air to the lower part of the supply surface. It is explanatory drawing of the delicate ventilation of the comparative example 1. It is explanatory drawing of the replacement ventilation of the comparative example 2. It is explanatory drawing of the replacement ventilation of an Example. It is a top view of the large-sized space room which shows the measurement points of the comparative examples 1 and 2 and an Example. It is a graph which shows the temperature distribution of the up-down direction in each measurement point. It is a graph which shows the wind speed distribution of the up-down direction in each measurement point.

  Hereinafter, the replacement ventilation equipment 1 concerning embodiment of this invention is demonstrated with reference to drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

As shown in FIG. 1, the large space room 10 that is air-conditioned by the replacement ventilation facility 1 has a height H from the floor surface 11 to the ceiling surface 12 of, for example, 16 to 17 m, and the area of the floor surface 11 is, for example, 4400m ² also has a large volume. On the floor surface 11 of the large space room 10, a large machine 13 used in various industrial fields and the like is placed. The large machine 13 is precisely assembled and adjusted in the large space chamber 10. For this reason, the inside of the large space chamber 10 is an air-conditioning target region 15 that requires a uniform temperature environment in a range from the floor surface 11 to at least the same height as the large machine 13. In this embodiment, the height h1 of the air conditioning target area 15 is set to 7.5 m. In the large space room 10, the air conditioning non-target region 16 is above the air conditioning target region 15.

  To the side of the large space chamber 10, the air in the large space chamber 10 is sucked in the air conditioning non-target region 16 and the temperature is adjusted, and then the temperature-controlled air (supply air SA) is circulated in the air conditioning target region 15. An air supply device 20 is installed for supply. A plurality of air supply devices 20 are installed on the side of the large space chamber 10. In FIG. 2, two air supply devices 20 are arranged side by side on the side of the large space chamber 10. Indicates the state. In addition, the installation number of the air supply apparatus 20 is arbitrary. Each air supply device 20 is installed, for example, between spans (not shown) inside the large space chamber 10.

  The air supply device 20 has a configuration in which an air supply chamber 21, a blower chamber 22, and a heat exchange chamber 23 are stacked in order from the bottom. The upper surface of the air supply chamber 21 and the lower surface of the air supply chamber 22, and the upper surface of the air supply chamber 22 and the lower surface of the heat exchange chamber 23 communicate with each other in a part of the area. A communication channel 19 is formed. As shown in FIG. 1, the back portions of the chambers 21 to 23 (the back portions of the air supply device 20) are closed by the side wall surface 24 of the large space chamber 10. Adjacent air supply devices 20 are installed at appropriate intervals along the side wall surface 24 of the large space chamber 10, and the front surfaces of the air supply devices 20 (the front surfaces of the chambers 21 to 23) are on the same plane. It has become.

  Inside the heat exchanger chamber 23, a heat exchanger 32 including a heating coil 30 and a cooling coil 31 is provided. The front surface of the heat exchange chamber 23 (side surface seen from the inside of the large space chamber 10) is an intake surface 34 formed of punching metal, mesh, or the like. Inside the heat exchange chamber 23, a passage 35 through which a person can pass is formed between the heat exchanger 32 and the inside of the intake surface 34. When a person enters the passage 35, the heat exchanger 32 and the blower 36 described later can be inspected, maintained, cleaned, and the like. As will be described later, this passage 35 may be provided outside the heat exchange chamber 23.

  A blower 36 that blows air downward is provided inside the blow chamber 22. Due to the operation of the blower 36, the air inside the large space 10 is drawn into the heat exchange chamber 23 through the intake surface 34 in the air conditioning non-target region 16 above the air conditioning target region 15, and is supplied to the heat exchanger 32. In contact and adjusted to the desired temperature. Then, the air adjusted to a desired temperature passes through the blow chamber 22 from the heat exchange chamber 23 and is further blown to the air supply chamber 21.

  On the front surface of the air supply chamber 21, an air supply surface 40 is continuously formed in the vertical direction from the floor surface 11 to a height of at least 80% of the air-conditioning target region 15. In this embodiment, the height h2 of the air supply surface 40 is set to 6 m. That is, at least 80% of the air-conditioning target area 15 is set as a supply area of the supply air SA, and above the supply area of the conditioned air, the supply air SA is floated by the action of replacement ventilation. A plurality of rows of air supply surfaces 40 extending in the vertical direction are formed on the sides of the large space chamber 10, and FIG. 2 shows a state in which two rows of air supply surfaces 40 are formed. Yes. The front surface of the air supply device 20 (the front surface of the air supply chamber 21, the air blowing chamber 22, and the heat exchange chamber 23) is a portion excluding the intake surface 34 and the air supply surface 40, such as a non-breathable panel such as ALC. It is blocked by. Also in these panels, the front surfaces of the air supply devices 20 (the front surfaces of the chambers 21 to 23) are on the same plane. The space on the back side of each panel can be used as a maintenance space, for example.

  As shown in FIG. 3, the air supply surface 40 is formed on the front surface of the air supply chamber 21 that can be seen from the inside of the large space chamber 10 (the side surface that can be seen from the inside of the large space chamber 10). Further, a rectifying plate 42 is arranged in parallel to the air permeable plate 41 with an appropriate gap inside the air permeable plate 41 (the side that becomes the inside of the air supply chamber 21). A plurality of air supply ports 43 are distributed in the rectifying plate 42, and the air permeable plate 41 and the rectifying plate 42 have sufficient air permeability. For this reason, as described above, the air blown in the order of the heat exchange chamber 23, the blower chamber 22, and the air supply chamber 21 by the operation of the blower 36 is used as the air supply surface 40 ( The air is supplied into the large space 10 through the air-permeable plate 41 and the rectifying plate 42).

  As shown in FIG. 4, a plurality of fins 45 are respectively attached to the air supply ports 43 provided in the rectifying plate 42. As shown in FIGS. 5 and 6, a support member 46 is provided at the center of each air supply port 43, and the fins 45 are radially attached around the support member 46 at appropriate equal intervals. In order to give a swirl component to the supply air SA that blows out from the air supply port 43 toward the inside of the large space chamber 10, the fins 45 are respectively inclined with respect to the central axis 43 ′ of the air supply port 43. In FIG. 5 and FIG. 6, the inclination direction of the fin 45 is in a reverse relationship.

  In this way, by attaching the fins 45 inclined to the air supply ports 43 in a radial manner, the air supply SA supplied from the air supply surface 40 of the air supply chamber 21 to the inside of the large space chamber 10 is supplied to the air supply ports 43. When passing through, it can be forced to flow along each fin 45. Thereby, the swirl component centering on the central axis 43 ′ is given to the air supply SA blown from the air supply surface 40 toward the large space chamber 10.

  Here, in FIGS. 5 and 6, the inclination directions of the fins 45 are opposite to each other. Therefore, depending on the fins 45 shown in FIG. When viewed from the indoor side, the swirl component in the counterclockwise rotation direction is given to the supply air SA. On the other hand, depending on the fins 45 shown in FIG. 6, when the air supply surface 40 is viewed from the inside of the large space chamber 10 when passing through the air supply port 43, the swirl component in the clockwise direction is the air supply SA. Given to.

  As shown in FIG. 4, in this embodiment, a plurality of air supply ports 43 are arranged side by side in the rectifying plate 42 in the vertical and horizontal directions. The swirl components of the supply air SA blown out from the adjacent air supply ports 43 are in the same rotational direction. On the other hand, the swirl components of the supply air SA blown out from the upper and lower adjacent air supply ports 43 are in opposite rotation directions.

  An outside air supply port 50 is provided in the air conditioning non-target region 16 so as to face the intake surface 34 of the heat exchange chamber 23. The outside air supply port 50 is provided at the same height as the intake surface 34. An outside air duct 52 including an outside air conditioner 51 is connected to the outside air supply port 50. The external air conditioner 51 includes a cooling coil 53, a heating coil 54, a humidifying nozzle 55, and a blower 56. Due to the operation of the blower 56, the outside air OA taken from the outside of the large space chamber 10 is temperature-controlled and humidity-controlled by the external air conditioner 51. The outside air is blown out from the outside air supply port 50 provided at the same height as the intake surface 34 of the heat exchange chamber 23 through the outside air duct 52 toward the intake surface 34 of the heat exchange chamber 23, 10 is supplied to the inside. The outside air supply port 50 may be a nozzle.

  On the ceiling surface 12 of the large space chamber 10, an exhaust port 60 is provided at a position closer to the center than the outside air supply port 50. The exhaust port 60 is provided above the intake surface 34. An exhaust duct 62 including a blower 61 is connected to the exhaust port 60. Due to the operation of the blower 61, the air in the large space chamber 10 is drawn into the exhaust port 60 from the air conditioning non-target region 16, and the exhaust EA is discharged to the outside of the large space chamber 10.

  The operation of the blower 61 provided in the exhaust duct 62 and the operation of the blower 56 built in the external air conditioner 51 are linked, and the supply amount of the outside air OA supplied to the inside of the large space chamber 10, The amount of exhaust EA discharged to the outside of the large space chamber 10 is set to be equal.

  Now, in the air supply device 20 arranged on the side in the large space 10 configured as described above, the large space 10 is provided in the air conditioning non-target region 16 by the operation of the blower 36 built in the blow chamber 22. Is drawn into the heat exchange chamber 23 through the intake surface 34. Then, the air adjusted to a desired temperature in contact with the heat exchanger 32 is blown in the order of the heat exchange chamber 23, the air blowing chamber 22, and the air supply chamber 21, and is supplied as a supply air SA through the air supply surface 40. It is supplied to the air-conditioning target area 15 in the room 10. In this case, the average wind speed (surface wind speed) of the supply air SA on the supply surface 40 is set to 0.7 m / s, for example.

  Here, the air supply surface 40 is continuously formed in the vertical direction from the floor surface 11 of the large space chamber 10 to a height of at least 80% of the air-conditioning target region 15. As described above, a plurality of rows of air supply surfaces 40 extending in the vertical direction are formed on the side of the large space chamber 10 in a horizontal direction, and are continuous from each air supply surface 40 in the vertical direction. The supply air SA is blown out, and the supply air SA blown out from the respective supply surfaces 40 is blown out in a layered manner in parallel with each other. In addition, the air in the vicinity of the front surface of the panel closing the space between the air supply surfaces 40 is attracted to the layered air supply SA blown out from the air supply surfaces 40 in this way. When the supply air SA is blown out from the air supply surface 40 to the air-conditioning target area 15 in the large space room 10 as described above, an attraction action is performed in which the air in the air-conditioning target area 15 is attracted and moves together. In this case, since the fin 45 is attached to each of the plurality of air supply ports 43 distributed on the air supply surface 40, a swirl component is given to the air supply SA blown from each air supply port 43, The amount of air attraction (attraction ratio) in the air-conditioning target area 15 that is attracted by the supply air SA increases. As the amount of attraction increases in this way, the speed of the supply air SA is immediately reduced after being blown out to the air-conditioning target area 15 in accordance with the momentum conservation law, and is quickly decelerated. And in the air-conditioning object area | region 15, the wind speed of supply air SA will be 0.5 m / s or less.

  Thus, the supply air SA blown out from each supply port 43 is supplied at a low speed while spreading toward the large machine 13 placed on the floor surface 11 of the large space chamber 10, and as a result, the large machine The supply air SA is supplied so as to wrap around the entire periphery of 13.

  Further, as the amount of attraction to the supply air SA blown out from each air supply port 43 increases, the temperature difference between the top and bottom is further reduced, and the entire air-conditioning target area 15 is air-conditioned to a substantially uniform temperature, which is a large machine. A temperature environment suitable for precise assembly and adjustment is realized. Further, by increasing the amount of attraction, the air-conditioning target area 15 can be efficiently air-conditioned with as little air flow as possible, which can contribute to energy saving. Furthermore, drafting can be suppressed by a small air volume, and measurement errors in laser measurement, vibration of the object to be processed, and the like can be suppressed.

  On the other hand, in the air-conditioning target area 15, in addition to the large machine 13, people and various devices as heating elements are present, so the air supply SA supplied to the air-conditioning target area 15 is heated and gradually relaxed. To rise. Due to the upward flow, contaminants such as dust and gas generated in the air-conditioning target area 15 move upward in the large space chamber 10 and are conveyed to the air-conditioning non-target area 16.

  In the air conditioning non-target area 16, a part of the air (heated air) accumulated in the upper part of the large space chamber 10 is externally connected to the outside of the large space chamber 10 through the exhaust port 60 and the exhaust duct 62 by the operation of the blower 61. To exhaust EA. In addition, the remainder of the air accumulated in the upper part of the large space chamber 10 comes from the intake surface 34 together with the outside air OA taken into the air conditioning non-target region 16 from the outside of the large space chamber 10 via the external air conditioner 51 and the outside air duct 52. It is taken into the heat exchange chamber 23. Then, the air adjusted to a desired temperature in contact with the heat exchanger 32 is blown in the order of the heat exchange chamber 23, the air blowing chamber 22, and the air supply chamber 21, and is supplied as a supply air SA through the air supply surface 40. It is supplied to the air-conditioning target area 15 in the room 10.

  In this way, ventilation in the large space chamber 10 is performed by exhausting contaminants such as dust and gas together with heated air from the upper portion of the large space chamber 10 while supplying the air supply SA to the air-conditioning target region 15. The air-conditioning target area 15 is maintained in a clean air supply SA environment. The air-conditioning target area 15 is maintained in a uniform temperature environment suitable for precise assembly and adjustment of large machines.

  In addition, in this replacement ventilation facility 1, the back surface of the air supply device 20 (the back surface of the air supply chamber 21, the blower chamber 22, and the heat exchange chamber 23) is blocked using the side wall surface 24 of the large space chamber 10. The effect of reducing equipment costs can be obtained. Further, by supplying air supply SA from a plurality of rows of air supply surfaces 40 formed laterally in the large space chamber 10 by using an attracting action, for example, the entire front surface of the air supply chamber 21 is supplied. The amount of air supply can be suppressed as compared with the case where the surface is used, and the equipment cost and running cost can be reduced. In addition, since the air supply surface 40 is disposed in the air conditioning target region 15 below the large space chamber 10 and the air intake surface 34 is disposed in the air conditioning non-target region 16 above the large space chamber 10, a short circuit of airflow is generated. Absent. In this case, if the air supply surface 40 and the air intake surface 34 are arranged on a vertical line, devices such as the heat exchanger 32 and the blower 36 are gathered at the same place for convenient maintenance, and the air intake surface 34 is connected to the ceiling surface 12. Compared with the case where it is provided, it is possible to save a return air duct and the like. If the outside air supply port 50 is arranged in the vicinity of the intake surface 34, the apparatus is integrated and compact. In addition, since the outside air OA is once supplied from the outside air supply port 50 to the air conditioning non-target area 16 and then taken into the heat exchange chamber 23, the return air and the outside air OA are generated in the indoor free space (air conditioning non-target area 16). It is mixed and the air-fueling box can be omitted. In addition, it is preferable in terms of design if the front surfaces of the air supply chamber 21, the air blowing chamber 22, and the heat exchange chamber 23 are flush with each other. In addition, since the exhaust port 60 is provided at the center of the large-sized space 10 than the outside air supply port 50, the outside air OA supplied from the outside air supply port 50 is not exhausted from the exhaust port 60. It is reliably taken into the heat exchange chamber 23.

  Further, in order to make the inspection passage 35 formed inside the heat exchange chamber 23 as wide as possible, it is desirable to make the front surface (intake surface 34) of the heat exchange chamber 23 (casing) as thin as possible. Further, a door or ladder for entering and exiting the passage 35 may be provided on the side surface of the heat exchange chamber 23. On the other hand, the thickness of the air supply device 20 is, for example, 900 mm, and the thickness of a panel such as ALC that closes the front surface of the air supply device 20 is, for example, 100 mm. In addition, the thing of the structure which pinched | interposed the heat insulating material other than the ALC panel may be employ | adopted, and a heat loss may be prevented. Further, the inspection passage 35 may be provided outside the heat exchange chamber 23. In that case, the passage 35 can be widened by manufacturing the heat exchange chamber 23 (casing) as thin as possible.

  The bottom plate of the heat exchange chamber 23 also serves as the top plate of the blower chamber 22 and is formed of, for example, a steel plate having a thickness of 1.2 mm. If the heat exchanger 32 (the heating coil 30 and the cooling coil 31) is moved toward the side wall surface 24 of the large space chamber 10 in the heat exchange chamber 23, the passage 35 can be widened. The intake surface 34 of the heat exchange chamber 23 uses, for example, a punching metal with an aperture ratio of 66% to guarantee the function of the air suction port and to prevent a pedestrian such as a worker who maintains equipment from falling. Furthermore, the bottom surface of the heat exchanger chamber 23 can be inclined so as to be lowered toward the side wall surface 24 of the large space 10, and the drain pan can also be used. However, since the outside air OA supplied into the large space 10 is humidity-controlled by the external air conditioner 51, the cooling coil 31 is kept non-condensing by controlling the flow rate of the cooling medium. It will only work when draining during replacement.

  The heat exchangers 32 (heating coil 30 and cooling coil 31) are each provided with a flow control valve, and can be individually controlled according to the load status. That is, the signals of a plurality of sensors around the production apparatus are shared by the controllers of the valves of the heating coils 30 and the cooling coils 31, but some coil chambers (the heating coil 30 and the cooling coil are used when the load is low. 31) can be operated at low load. The blower 36 in the blower chamber 22 is operated with a constant air flow without an inverter or the like.

  As shown in FIG. 7, a member serving as air supply resistance such as a rectifying cloth 65 may be attached to a lower portion of the air supply surface 40 formed on the front surface of the air supply chamber 21. In this case, the rectifying cloth 65 is attached from the floor surface 11 to a height of 2 m, for example. This is because, at the lower part of the air supply surface 40, the outflow of the air flow blown down from the blower 36 is more intense than the upper part of the air supply surface 40. Is intended.

  The blower chamber 22 and the heat exchange chamber 23 may be integrally formed as a fan coil unit, and the stacking order may be reversed with the blower chamber 22 at the upper part and the heat exchange chamber 23 at the lower part. Although the passage 35 is provided on the indoor side in the heat exchange chamber 23, for example, if the blower 36 is a double suction type from the side and the casing of the blower chamber 22 is omitted, the bottom surface of the blower chamber 22 may be the passage 35. it can. The passage 35 may be provided with an elevating step on the side of the air supply chamber 21 or may be passed from the catwalk.

(Comparative Example 1)
As shown in FIG. 8, in the comparative example 1, the deliberate ventilation is performed in which ventilation is performed by the airflow (supply air SA) blown from the nozzle 70 installed in the upper part of the large space chamber 10. Twenty-seven nozzles 70 were installed at equal intervals in the vertical and horizontal directions at a height of 14 m from the floor surface 11 in the large space chamber 10. The installation interval of each nozzle 70 was 1 m × 1 m. The total area balloon is 27m ^2. The total air volume of the supply air SA was 834000 m ³ / h, and the blowing air speed was 8.6 m / s. Further, exhaust ports 60 each having a width of 9 m and a height of 2 m were provided at 10 positions at a position 9 m from the floor surface 11. The total displacement was 834,000 m ³ / h.

(Comparative Example 2)
As shown in FIG. 9, in Comparative Example 2, displacement ventilation was performed in which air-conditioned air (supply air SA) was blown from the front surface 72 of the air supply device 71 at a slight wind speed toward the inside of the large space 10. . The front surface 72 of the air supply device 71 is made of punching metal. Note that there is no means for giving a swirl component to the supply air SA. Air supply surfaces having a width of 9 to 35 m and a height of 7.5 m were provided at seven locations at a height of 0.1 m from the floor surface 11 in the large space chamber 10. The total blowing area is 810 m ² . The total air volume of the supply air SA was 834000 m ³ / h, and the blowing air speed was 0.29 m / s. Further, exhaust ports 60 each having a width of 9 m and a height of 2 m were provided at 10 positions at a position 9 m from the floor surface 11. The total displacement was 834,000 m ³ / h.

(Example)
As shown in FIG. 10, in the embodiment, attraction type replacement ventilation is performed in which ventilation is performed by blowing out supply air SA to which a swirl component is supplied from an air supply surface 40 provided in front of the air supply chamber 21. The air supply surface 40 has a double structure of a rectifying plate and a punching metal each having a plurality of fins attached to each air supply port. The air supply surface 40 which continued in the up-down direction from 0.1 m to 7.5 m on the floor surface 11 in the large space chamber 10 was provided in ten places. The total blowing area is 337.5 m ² . The total air volume of the supply air SA was 834000 m ³ / h, and the blowing air speed was 0.29 m / s. Further, exhaust ports 60 each having a width of 9 m and a height of 2 m were provided at 10 positions at a position 9 m from the floor surface 11. The total displacement was 834,000 m ³ / h.

  The large-sized space room 10 used in Comparative Examples 1 and 2 and Examples is 60 m in the east and west, 80 m in the north and south, and a ceiling height of 16 to 17 m (some have a ceiling height of 12 m and a room on the second floor). In this large space chamber 10, in addition to temperature accuracy to ensure the member length accuracy of several μm, humidity accuracy to prevent static electricity and rust suppression, in addition to existing chambers to reduce measurement errors of ultrasonic measuring instruments The airflow velocity with strict requirements was also presented, and whether or not these were compatible was an important evaluation item. As shown in FIG. 11, the temperature distribution in the vertical direction and the wind speed distribution were analyzed at three locations (points 1 to 3) of the large space chamber 10. The analysis was performed by CFD (computational fluid analysis).

  The analysis result of the temperature distribution of Comparative Examples 1 and 2 and the example is shown in FIG. The analysis result of the wind speed distribution of Comparative Examples 1 and 2 and the example is shown in FIG.

  In the case of the nozzle-type ventilating ventilation generally used in a large space as in the comparative example 1, the room air is sufficiently mixed and the temperature distribution can be made uniform. On the other hand, it became clear that the required specifications could not be satisfied because the wind speed in the space became faster and exceeded 0.6 m / s. This is because in the ventilated ventilation supplied from the ceiling, the blowing air velocity is high and the downward blowing air flow is not easily attenuated due to the difference in specific gravity of the cold air.

  On the other hand, in the replacement ventilation of the punching method of Comparative Example 2 and the attraction type replacement ventilation method of the embodiment that gives the swirl component to the supply air, the temperature stratification is formed above the supply surface, but the same as the supply surface At the height, the planar temperature is about ± 1 ° C, and the temperature distribution in the vertical direction is about 1.0 ° C, which satisfies the requirements. Also, it was confirmed that the inside of the control target area was 0.6 m / s or less even at the wind speed. Thereby, it turned out that the substitution type ventilation system of the punching system of the comparative example 2 and the attraction type substitution ventilation system of the Example which gives a turning component to supply air satisfy | fill a requirement specification. However, the attraction type replacement ventilation system of the embodiment has an air discharge area of about 1/3 compared to the punching system replacement ventilation of Comparative Example 2, which is advantageous in terms of construction cost and accommodation of equipment. Further, in the heating operation at low load in winter, in the replacement ventilation of the punching method of Comparative Example 2, the warm air supply rises to the upper part of the room, and it is difficult to remove the cold air that tends to accumulate below by a cold draft or the like. Therefore, it is necessary to consider measures such as providing another mechanism. By combining the above, it has been found that the attraction-type replacement ventilation system of the embodiment in which the heating effect is enhanced by the increase in attraction is advantageous.

  INDUSTRIAL APPLICABILITY The present invention is useful for a large space room for performing precise assembly and adjustment of a large machine such as an ultrasonic measuring instrument with high accuracy.

SA Air supply OA Outside air EA Exhaust 1 Replacement ventilation equipment 10 Large space room 10
DESCRIPTION OF SYMBOLS 11 Floor surface 12 Ceiling surface 13 Large machine 15 Air-conditioning object area | region 16 Air-conditioning non-object area | region 19 Flow path 20 Air supply apparatus 21 Air supply chamber 22 Air blow chamber 23 Heat exchange chamber 24 Side wall surface 30 Heating coil 31 Cooling coil 32 Heat exchanger 34 Air intake surface 35 Passage 36 Blower 40 Air supply surface 41 Breathable plate 42 Rectifier plate 43 Air supply port 45 Fin 46 Support member 50 External air supply port 51 External conditioner 52 External air duct 60 Exhaust port 61 Blower 62 Exhaust duct

Claims (5)

A replacement ventilation facility for a large space room in which the air-conditioning target area is formed to a height of 7 m or more from the floor surface,
On the side of the large space room, an air supply surface for supplying air to the large space room is continuously formed in the vertical direction at least up to a height of 80% of the air-conditioning target area.
An air intake surface for sucking air in the large space room is formed above the air conditioning target area,
The air supply surface is provided with a plurality of air supply ports distributed,
The air conditioning non-target region above the air conditioning target region is provided with an outside air supply port facing the intake surface, and an exhaust port is provided at a position closer to the center than the outside air supply port. A featured replacement ventilation system for large space rooms. To the side of the large space room, air in the large space room is sucked in the air conditioning non-target area and the temperature is adjusted, and then the temperature-controlled air is circulated and supplied to the air conditioning target area. A number of devices are arranged side by side,
The replacement ventilation system for a large space room according to claim 1, wherein a passage through which a person can pass is formed inside a heat exchange chamber provided in the air supply device .   The replacement ventilation equipment for a large space chamber according to claim 2, wherein the bottom surface of the heat exchange chamber is inclined so as to be lowered toward the side wall surface of the large space chamber, and is also used as a drain pan. To the side of the large space room, air in the large space room is sucked in the air conditioning non-target area and the temperature is adjusted, and then the temperature-controlled air is circulated and supplied to the air conditioning target area. A number of devices are arranged side by side,
The replacement ventilation system for a large space room according to claim 1, wherein a passage through which a person can pass is formed in an air blowing chamber provided in the air supply device .   A rectifying plate provided with a plurality of air supply ports distributed on the air supply surface is attached,
  The replacement ventilation equipment for a large space room according to any one of claims 1 to 4, wherein a resistance member serving as a resistance for air supply is attached to a lower portion of the rectifying plate.

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