JP4196329B2 - Cold air ventilation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cold air ventilation system that ventilates a building such as a factory while cooling, and more specifically, cools the inside of a building with cold air cooled by a cooling unit, while the hot air in the upper part of the building is externalized by a ventilator. The present invention relates to a cold air ventilation system that discharges the air.
[0002]
[Prior art]
If the roof or walls of a building such as a manufacturing plant are poorly insulated, the temperature inside the building becomes abnormally high due to the effects of solar radiation, particularly in the summer, and the work efficiency and safety of the worker may be greatly reduced.
For this reason, there is an indoor ventilation system that cools the air in the building, but conventionally, water is sprayed from the top to the chilled water element of the cooling unit installed on one wall or window, and the air flowing from the outside air by the latent heat of water evaporation The temperature was lowered, cold air was sent into the building, and the air that passed through the building was discharged from the ceiling or the other wall or window (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-39585 (pages 2 and 3, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
However, in the above cooling unit, the evaporated moisture enters the building such as factories, so the humidity in the building rises higher than the outside air, and the production varieties in the building are particularly sensitive to moisture. In addition, it was necessary to perform sufficient water quality management assuming that germs were mixed in the water spray. Furthermore, since cooling air is supplied only to the worker space near the floor and exhausts from the roof or walls and windows, the ceiling surface, which becomes hot due to solar radiation, is hardly cooled and the ceiling surface temperature rises. When the roof is low, the operator feels uncomfortable due to the radiant heat from the roof surface, and the radiant heat tries to raise the temperature of the wall surface and floor surface. Units could be expensive.
[0005]
The present invention has been made to solve the above problems, and without increasing the humidity in the factory, the temperature of the roof surface is lowered to reduce the radiant heat, and the operator's discomfort due to the radiation is eliminated. An object of the present invention is to provide a cold air ventilation system that reduces the temperature rise of the wall surface and the floor surface and can be constructed at low cost even if the cooling unit has a small capacity.
[0006]
A cold air ventilation system according to the present invention is provided with a cooling unit in a building, and cold air is formed by exchanging sensible heat between the cold water produced by the cold water generator and the air taken into the cooling unit. It is circulated near the lower part of the building and discharged to the outside, and a ventilation device is provided in the building where the ventilation air supply fan and the ventilation exhaust fan are provided at almost the same height to form ventilation air, and the upper part in the building It is designed to circulate around and discharge to the outside.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
1 is a side view showing a factory equipped with a cold air ventilation system according to Embodiment 1 of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a front view of the main part of FIG. 2, and FIG. FIG. In the figure, a factory building 1 includes a roof 2 and side walls 3 (first side wall 3a and second side wall 3b arranged opposite to each other), and a cooling unit 4 is attached to the first side wall 3a.
As will be described in detail with reference to FIGS. 3 and 4, the cooling unit 4 has a suction port 5 for sucking outside air, and toward the downstream side of the suction port 5, a filter 6, a blower 7, and a cooling heat exchanger 8. Are arranged sequentially, and an outlet 9 is provided on the downstream side of the heat exchange 8 for cooling. The blowout port 9 is constituted by a bellows-like duct 10, and the blowout direction can be freely changed from the horizontal direction to the vertical direction by moving it in the direction of arrow A with the fulcrum 11 as an axis.
[0008]
A cooling water generator 12 that makes cold water using a cooling tower is disposed outside the building 1, and the cooling water generator 12 and the cooling unit 4 are connected by a pipe 13. A cold water circulation pump 14 is attached to the pipe 13, and the cold water produced by the cooling water generator 12 is conveyed to the cooling heat exchanger 8 of the cooling unit 4, and the outside air is cooled by the cooling heat exchanger 8. The water exchanged with the water is returned to the cold water generator 12 again.
A cool air exhaust fan 15 is attached to the second side wall 3b on the side facing the first side wall 3a to which the cooling unit 4 is attached, at substantially the same height as the cooling unit 4.
A ventilation air supply fan 16 is attached to the top of the cooling unit 4 on the first side wall 3a, and the height of the ventilation air supply fan 16 is on the top of the cold air exhaust fan 15 on the second side wall 3b. A ventilation exhaust fan 17 is provided at a position substantially the same as the position.
[0009]
The operation of the present embodiment configured as described above will be described. The cold water produced by the cold water generator 12 is sent from the cold water generator 12 through the pipe 13 to the cooling heat exchanger 8 of the cooling unit 4 by the cold water circulation pump 14. On the other hand, the outside air is sucked from the suction port 5 in the direction B by the blower 7 of the cooling unit 4, dust is removed by the filter 6, reaches the cooling heat exchanger 8, and is sent from the cold water generator 12 here. Heat is exchanged with cold water, which becomes cold air and blows out into the building 1 from the outlet 9. At this time, the blowing direction of the bellows-like outlet 9 of the cooling unit 4 is changed from the horizontal direction to the vertical direction according to the position of the operator 18. Thus, the cold air a that has blown into the building 1 is discharged in the direction C to the outside by the cool air exhaust fan 15 while passing through the worker 18.
[0010]
At this time, the cold air b blown out from the cooling unit 4 has a lower temperature and a higher density than the ventilation air b located near the roof 2, so that it crawls near the floor surface where the worker 18 is located. And go through. At this time, even if dust or odor is generated in the work space, the cold air a is constantly ventilated to clean the work space.
On the other hand, the outside air is also sucked from the two directions by the ventilation air supply fan 16 and supplied to the building 1 as ventilation air b, and is cooled by the ventilation exhaust fan 17 while cooling the upper part of the roof 2 and the side wall 3. It is discharged in the direction of E
[0011]
According to the present embodiment, since the cold air a is allowed to flow only in the work space near the floor and the vicinity of the upper roof surface is cooled by the ventilation air b, the discomfort of the operator 18 due to radiation can be reduced. In addition, the cooling capacity of the cooling unit 4 is small, and it can be configured at low cost. Moreover, since the cold air a is only for sensible heat exchange, there is no increase in absolute humidity compared to the outside air.
[0012]
[Embodiment 2]
FIG. 5 is a side view of a factory equipped with a cold air ventilation system according to Embodiment 2 of the present invention, and FIG. 6 is a front view of FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted (the same applies hereinafter).
In the present embodiment, the cool air exhaust fan 15 shown in the first embodiment is omitted, and the exhaust of the cool air a is performed by the ventilation exhaust fan 17.
[0013]
The operation of the present embodiment configured as described above will be described. The cold wind air a blown out from the blowout port 9 of the cooling unit 4 passes through the worker 18, rises up the second side wall 3 b, and is discharged from the ventilation exhaust fan 17 toward the external ho.
As described above, in the present embodiment, the cool air exhaust fan 15 is omitted and the exhaust of the cool air a is also used as the exhaust fan 17 for the ventilation. Since the air volume of a and the air volume of ventilation air b are the sum, a large exhaust fan 17 is required for ventilation. However, since the number of fans is small, the system is simplified and the entire system is inexpensive. Can be configured. Moreover, since the side wall 3 is cooled when the cold air which passed through the inside of the building 1 rises along the side wall 3, the temperature of the side wall 3 is lowered, and the influence of radiant heat on the worker 18 can be reduced.
[0014]
[Embodiment 3]
7 is a side view of a factory equipped with a cold air ventilation system according to the present invention, and FIG. 8 is a front view of FIG.
In the present embodiment, the cooling units 4 are installed at several locations on the side wall 3, and when the workers 18 are working in groups at several locations in the building 1, It is intended to focus on.
The cooling unit 4 is attached to, for example, two places on the third side wall 3c, and the cold air a is blown from here.
In the present embodiment configured as described above, the cold air a is blown out from the outlet 9 of the cooling unit 4 installed in the vicinity of the group of workers 18 and hits the worker 18, and passes through the ventilation exhaust fan 17 to the outside. To be released.
[0015]
When workers 18 are scattered individually in the building 1 or engaged in work that moves around the building 1, the worker space in the building 1, for example, all spaces within 2 m above the floor are cooled. For this reason, the cooling unit 4 having a large capacity is required. However, according to the present embodiment, cooling is performed by concentrating the cold air a on the space where the workers 18 are working in a collective manner. Therefore, the capacity of the cooling unit 4 can be small, and the cooling efficiency can be improved.
[0016]
[Embodiment 4]
FIG. 9 is a front view of a factory equipped with a cold air ventilation system according to Embodiment 4 of the present invention. In this embodiment, a guide plate 19 is attached to the ventilation air supply fan 16.
In the drawing, a guide plate 19 that is inclined toward the roof 2 side is attached to the building 1 side of the ventilation air supply fan 16, and the ventilation air b just after sucked in from the ventilation air supply fan 16 is applied to the roof 2 surface. The two roofs are cooled by direct contact.
According to the present embodiment, since the two roof surfaces are actively cooled, the roof two surfaces are not abnormally heated even by solar radiation, and the temperature of the two roof surfaces is lowered, so that the amount of radiation is reduced. Thus, the operator's discomfort can be reduced, the capacity of the cooling unit 4 can be reduced, and the cooling efficiency can be improved.
[0017]
[Embodiment 5]
10 is a front view of a main part of a factory equipped with a cold air ventilation system according to Embodiment 5 of the present invention, and FIG. 11 is a side view of FIG. In the first, second, third, and fourth embodiments, the air intake port of the cooling unit 4 is only the intake port 5 for taking in the outside air. However, in the present embodiment, it is provided at two locations on the outside air side and the inside of the building 1. It is a thing.
As shown in the figure, a first suction port 5a for sucking cooling air from the outside is provided on the outside air side (A side) of the cooling unit 4, and cooling air is sucked from the room inside the building 1 (B side). The second suction port 5b is provided, and a switching damper 20 that selectively closes the suction ports 5a and 5b is attached so that the second suction port 5b can be freely rotated in the direction about the rotation shaft 21 as a fulcrum. It has become.
[0018]
In the present embodiment configured as described above, when the switching damper 20 is located inside the building 1 (B side), the outside air is sucked in from the outside air (A side) inlet 5a in the direction B. The subsequent operation in this case is the same as that described in the first to fourth embodiments.
When the switching damper 20 is located on the outside air side (A side), the indoor air is taken in from the inlet 5b inside the building 1 (B side), cooled in the cooling unit 4, and then discharged from the outlet 9 The air is blown out as the cold air a, becomes a circulating flow of the cold air a, and becomes an indoor circulating flow while passing through the worker 18.
According to the present embodiment, the switching damper 20 is provided at the suction port 5 of the cooling unit 4 so that the cooling air can be selected from either the case of suctioning from the outside or the case of suctioning from the building 1. Therefore, it is not necessary to ventilate the inside of the building 1, and when the outside air temperature is high, it is better to suck in the air in the building 1 and circulate it in the building than to suck in air from the outside. The cooling effect is increased. In this way, the optimal cooling unit 4 can be operated according to the work environment and the outside air condition.
[0019]
[Embodiment 6]
12 is a side view of a main part of a factory equipped with a cold air ventilation system according to Embodiment 6 of the present invention, and FIG. 13 is a front view of FIG. In the present embodiment, a swing louver is attached to the cooling unit 4.
As shown in the figure, the air outlet 9 of the cooling unit 4 is provided with a plurality of swing louvers 22, one end of which is supported by a fulcrum support bar 23 by a first fulcrum 23a, and the other end by a second fulcrum 25a. A reciprocating support rod 25 attached to the reciprocating device 24 is slidably supported.
[0020]
In the present embodiment configured as described above, when the reciprocating device 24 is driven and the reciprocating support rod 25 reciprocates in the direction G, the swing louver 22 is a first fulcrum provided on the fulcrum support rod 23. The air in the cooling unit 4 is blown in the direction of the swing louver 22 depending on the direction of the swing louver 22, that is, the position of the swing louver 22 indicated by the dotted line in FIG. Is done.
According to the present embodiment, since the swing louver 22 is provided, the cold air blowing range is widened, and cold air can be given to the workers 18 that are widely scattered. In this case, although it becomes an intermittent wind with respect to the operator 18, a cool feeling increases compared with a continuous wind, and an unpleasantness can be reduced more.
[0021]
【The invention's effect】
As is clear from the above invention, according to the present invention, the cold water produced by the cold water generator is passed through the cooling unit installed in the factory, where the outside air is cooled to form cold air into the building such as the factory. Since it is supplied, the humidity in the building does not rise, and the roof surface is cooled by the ventilation fan and exhaust fan provided near the roof surface, so that the radiant heat is reduced. The cooling capacity of the cooling unit can be reduced, and the entire system can be configured at low cost.
In this way, an abnormal temperature rise in the building, particularly in the summer, can be suppressed, and since there is no increase in absolute humidity in the building, there is no limitation on the production type.
[Brief description of the drawings]
FIG. 1 is a side view of a factory equipped with a cold air ventilation system according to Embodiment 1 of the present invention.
FIG. 2 is a front view of FIG.
FIG. 3 is an enlarged front view of a main part of FIG. 2;
4 is a side view of FIG. 3. FIG.
FIG. 5 is a side view of a factory equipped with a cold air ventilation system according to Embodiment 2 of the present invention.
6 is a front view of FIG. 5. FIG.
FIG. 7 is a side view of a factory equipped with a cold air ventilation system according to Embodiment 3 of the present invention.
FIG. 8 is a front view of FIG. 7;
FIG. 9 is a front view of a factory equipped with a cold air ventilation system according to Embodiment 4 of the present invention.
FIG. 10 is a front view of a main part of a factory equipped with a cold air ventilation system according to a fifth embodiment of the present invention.
11 is a side view of FIG.
FIG. 12 is a side view of a main part of a factory provided with a cold wind arousing system according to Embodiment 6 of the present invention.
FIG. 13 is a front view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Building, 2 Roof, 4 Cooling unit, 5, 5a, 5b Inlet, 6 Filter, 7 Blower, 8 Cooling heat exchanger, 9 Outlet, 10 Duct, 12 Cold water generator, 15 Exhaust fan for cold air, 16 Air supply fan for ventilation, 17 Exhaust fan for ventilation, 19 Guide plate, 20 Switching damper, 22 Swing louver, a Cold air, b Ventilation air.

Claims (10)

A cooling unit is provided in the building, sensible heat exchange is performed between the cold water produced by the cold water generator and the air taken into the cooling unit to form cold air, and the cold air is circulated near the lower part of the building. In addition to discharging to the outside, a ventilation device in which the ventilation air supply fan and the ventilation exhaust fan are provided at almost the same height in the building is formed to form ventilation air, and is circulated around the upper part in the building. Cold air ventilation system characterized by exhausting to the outside. The cold air is sucked from the cooling unit located on the floor side and discharged from the cold air exhaust device, and the ventilation air is sucked from the ventilation air supply fan located on the roof side and discharged from the ventilation exhaust fan . The cold air ventilation system according to claim 1. The cold air is sucked from a cooling unit located on the floor side, and the ventilation air is sucked from a ventilation air supply fan located on the roof side, and both the cold air and the ventilation air are ventilated located on the roof side. 2. The cold air ventilation system according to claim 1, wherein the air is exhausted from an exhaust fan .   The cooling air ventilation system according to any one of claims 1 to 3, wherein a plurality of cooling units are provided, and the cooling air is blown to a plurality of zones.   The cold air ventilation system according to any one of claims 1 to 4, wherein a guide plate for guiding the ventilation air to the roof side is provided in front of the ventilation air supply fan.   The cooling heat exchanger that communicates with the filter, the blower, and the cold water generator is sequentially disposed in the path from the suction port to the blowout port of the cooling unit. Cold air ventilation system.   7. The cold air ventilation system according to claim 6, wherein openings are provided on the outdoor side and the indoor side of the suction port of the cooling unit, and the openings are selectively opened and closed by a switching damper.   The cold air ventilation system according to claim 6, wherein the outlet of the cooling unit is changed from a substantially horizontal direction to a vertical direction.   The cold air ventilation system according to claim 6, wherein a swing louver is provided at an outlet of the cooling unit.   The cold air ventilation system according to any one of claims 1 to 9, further comprising a cold water generator that evaporates a part of the circulating water by a cooling tower to produce cold water.

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