JP7065296B2 - Cooling system - Google Patents

Description

The present invention relates to a cooling device that ejects mist to cool an outdoor space.

When the summer temperature is high, the temperature near the road surface can become very high due to the reflection from the road surface. In this case, the sensible temperature of the passerby rises, and the discomfort of the passerby increases.

In order to reduce such discomfort, Patent Document 1 describes a main body, at least one spray nozzle installed around the main body and spraying water in a mist form toward the outside, and above the spray nozzle. Disclosed is a technique relating to a cooling device that is installed and has a vent that blows airflow toward the mist sprayed from a spray nozzle. In such a cooling device, the environment formed by the airflow space surrounding the mist sprayed from the spray nozzle can be efficiently cooled by utilizing the cooling action by the heat of vaporization of the mist.

Japanese Unexamined Patent Publication No. 2016-28217

However, in the prior art described in Patent Document 1, as shown in FIG. 8, the hollow body 103 is provided at the boundary between the side wall 101 and the road 102, and the vent hole 104 is provided in the side wall 131 on the side wall 101 side of the hollow body 103. The structure is such that the control valve 108 is opened, the mist is sprayed from the water supply pump 106 through the water supply pipe 107, and the mist is sprayed from the spray nozzle 105 toward the internal space S of the hollow body 103, and the mist is discharged from the ventilation hole 104. However, when the hollow body 103 is warmed during the daytime when the outside temperature is high, the temperature of the airflow blown from the ventilation hole 104 rises, so that the air in the environment formed in the airflow space surrounding the fog sprayed from the spray nozzle 105. The amount of temperature drop is small.

The present invention solves the above-mentioned conventional problems, and increases the amount of temperature decrease of the air in the environment formed by the airflow space surrounding the fog sprayed from the spray nozzle even in the daytime when the outside air temperature is high. It is an object of the present invention to provide a cooling device which can be used.

In order to solve the above-mentioned conventional problems, the cooling device of the present invention includes an outlet for air to flow out, an outlet duct for transporting air in a substantially horizontal direction, and a supply port for air to flow in. , A supply duct that supplies the air that has flowed in from the supply port upward to the outlet duct, a blower placed in the supply duct or the outlet duct, and a blower duct that is provided in the outlet duct and is formed by an air flow that blows downward from the outlet. It is equipped with a spray nozzle that ejects mist toward the airflow space, and the supply port is arranged at a position that sucks in the air flow that blows downward from the outlet, adjacent to the supply duct, and the supply port is installed. A rear duct placed on a non-existent surface, a rear duct intake port below the rear duct , and a rear duct exhaust port that exhausts the air in the rear duct to the outside of the rear duct above the rear duct are provided adjacent to the outlet duct. In addition, a top duct is provided on the surface where the air outlet is not installed, and one end of the top duct communicates with the rear duct exhaust port and together with the air in the back duct discharged from the back duct exhaust port. It has a first top duct opening for discharging the air in the top duct to the atmosphere, and the other end of the top duct has a second top duct opening.

As a result, the air in the substantially dome-shaped airflow space (air dome) generated by the airflow blown out from the above-mentioned outlet circulates, and is repeatedly cooled by the heat of vaporization of the fog. Since the amount of heat received from the warmed outlet duct and the supply duct is reduced, the amount of temperature decrease of the air in the space can be increased.

The cooling device of the present invention can increase the amount of temperature decrease of the air in the environment formed in the airflow space surrounding the fog sprayed from the spray nozzle even in the daytime when the outside air temperature is high.

Sectional drawing of the side surface which shows the structure of the cooling apparatus 10A which concerns on Embodiment 1. Front view showing the configuration of the cooling device 10A according to the first embodiment. Rear view showing the configuration of the cooling device 10A according to the first embodiment. Sectional drawing of the side surface which shows the structure of the cooling apparatus 10B which concerns on Embodiment 2. Front view showing the configuration of the cooling device 10C according to the third embodiment. Rear view showing the configuration of the cooling device 10C according to the third embodiment. Sectional drawing of the side surface which shows the structure of the cooling apparatus 10D which concerns on Embodiment 4. The figure which shows the structure of the cooling device of the prior art

In the first invention, the cooling device includes an outlet through which air flows out, an outlet duct for transporting air in a substantially horizontal direction, a supply port through which air flows in, and air flowing in from the supply port. Is provided in the supply duct that supplies the air upward to the outlet duct, the blower placed in the supply duct or the outlet duct, and the outlet duct, and the mist is directed toward the air flow space formed by the air flow that blows downward from the outlet. The rear duct is provided with a spray nozzle for ejecting, and the supply port is arranged at a position where the air flow blown downward from the outlet is sucked, adjacent to the supply duct, and arranged on a surface where the supply port is not installed. A rear duct intake port is provided below the rear duct , and a rear duct exhaust port is provided above the rear duct to exhaust the air in the rear duct to the outside of the rear duct. A top duct is provided on a surface that is not installed, and one end of the top duct communicates with the rear duct exhaust port, and the air in the top duct is taken out together with the air in the back duct discharged from the rear duct exhaust port. It has a first top duct opening for discharging into the atmosphere, and the other end of the top duct has a second top duct opening.

According to this configuration, the mist sprayed from the spray nozzle rarely flows out from the air dome generated by the airflow blown from the air outlet, and evaporates inside the space blocked by the air dome, and the space is concerned. The air inside is cooled. The low temperature and high humidity air in the space flows into the supply duct from the supply port.

At this time, in the rear duct adjacent to the supply duct, the air warmed in the rear duct by sunlight causes natural convection due to the enthusiast effect, air flows in from the rear duct intake port, and is exhausted from the rear duct exhaust port. .. As a result, the amount of heat received from the rear duct to the supply duct is reduced.

Further, the air of the top duct warmed by the sunlight is attracted by the air discharged from the rear duct exhaust port, and the air sucked from the second top duct opening is the first top duct opening. It passes through the section and is discharged to the outside of the machine. As a result, the amount of heat received from the top duct to the outlet duct is reduced.

Therefore, since the temperature rise of the air passing through the supply duct and the blowout duct can be reduced, the amount of temperature decrease of the air in the space can be increased.

The second invention is in the first invention that the area of the supply port is larger than the area of the air outlet.

According to this configuration, when air is taken in from the supply port, the area of the supply port is larger than the area of the outlet, so that the suction wind speed is slower than the blow air speed. As a result, the unevaporated fog (water droplets) in the air is less likely to be taken in from the supply port, and the evaporation of the fog can be further promoted.

Therefore, even when the temperature of the outside air is high, the amount of temperature decrease of the air in the space can be increased.

In the third aspect of the invention, in the first or second invention, a top duct inclined portion is provided in the middle of the top duct, and the top duct inclined portion has a top duct intake port opened to the outlet duct. There is something in it.

According to this configuration, when the sunlight is strong, in the rear duct adjacent to the supply duct, the air warmed in the rear duct is naturally convected due to the enthusiast effect, and the air flows in from the rear duct intake port. Heat is exhausted from the rear duct exhaust port.

At this time, as for the air in the top duct warmed by the sunlight, a part of the air blown from the blower to the blowout duct flows in from the top duct intake port, and the collision jet flow to the slope of the slope of the top duct causes. The airflow is distributed, one draining from the first top duct opening and the other flowing to the second top duct opening. The air discharged from the opening of the first top duct further attracts the air discharged from the exhaust port of the rear duct, and is discharged to the outside of the machine while increasing the velocity of the air flow in the rear duct. As a result, the amount of heat received from the top duct to the outlet duct and the amount of heat received from the rear duct to the supply duct are reduced.

Therefore, even when the sunlight is strong, the rise in the air temperature of the rear duct and the top duct is suppressed, the temperature rise of the air flowing in from the supply port is suppressed, and the air dome is blocked by the mist ejected. The amount of temperature decrease of the air in the space can be increased.

A fourth invention is in the first to third inventions, in which at least two blowers are arranged in parallel with the flow of airflow.

According to this configuration, even when the natural wind blown from the side is strong, the air flow rate increases and the air flow velocity from the air outlet increases due to the parallelization of the blowers. As a result, the effect of blocking the natural wind blown from the side by the blown air is enhanced, so that it is possible to further prevent the high temperature air of the outside air from being mixed with the cold space formed by the spray of fog.

Therefore, even when the natural wind blowing from the side is strong, it is possible to increase the amount of temperature decrease while suppressing the increase in the humidity of the air in the space.

A fifth aspect of the invention is that in the first to third inventions, at least two blowers are arranged in series with respect to the flow of airflow.

According to this configuration, even if the air passage from the supply port to the blower is warmed and the temperature is high even if it is installed in a place where the natural wind blowing from the side is strong and the sunlight is strong, the blowers are connected in series. As a result, the air flow velocity from the air outlet becomes faster without significantly increasing the air flow rate in the duct due to the increase in the static pressure inside the machine. As a result, the effect of blocking the natural wind blown from the side by the blown air is improved, and the air flow rate when passing through the duct does not increase, so that the amount of heat exchange with the members constituting the air passage does not increase, and the blown air does not increase. It is possible to prevent the high temperature air of the outside air from being mixed with the cold space while preventing the rise of the air.

Therefore, even when the natural wind blowing from the side is strong and the sunlight is strong, the amount of temperature decrease of the air in the space can be increased.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the present embodiment.

<Embodiment 1>
[Configuration of cooling device 10A]
1 to 3 are views showing the configuration of the cooling device 10A according to the first embodiment. FIG. 1 is a cross-sectional view of a side surface of the cooling device 10A. FIG. 2 is a front view of the cooling device 10A. FIG. 3 is a rear view of the cooling device 10A.

1 to 3, the cooling device 10A includes a supply port 20, a supply duct 21, a blower 30, an outlet 22, an outlet duct 23, and a spray nozzle 24.

From the supply port 20, low-temperature and high-humidity air cooled by mist flows in from the space blocked by the air dome. The inflow vertical angle at the opening of the supply port 20 can be freely set. For example, as shown in FIG. 1, by opening the supply port 20 in the horizontal direction, it is possible to prevent rainwater from entering from the supply port 20 in rainy weather or the like.

In the supply duct 21, the air flowing in from the supply port 20 flows toward the blower 30 above.

The outlet 22 is provided at a position above the supply port 20 in the outlet duct 23, and blows out the air flowing in the substantially horizontal direction in the outlet duct 23 downward. A plurality of outlets 22 are provided. However, only one outlet 22 may be provided. The cross-sectional shape of the air outlet 22 is rectangular, but it may be circular, elliptical, or polygonal.

The blower 30 generates the above-mentioned air flow. That is, the blower 30 flows in from the supply port 20, is boosted by the blower 30 through the supply duct 21, and generates an air flow that is blown out from the outlet 22 through the blow duct 23.

The spray nozzle 24 is provided on the lower surface of the blowout duct 23, and ejects mist downward away from the blowout duct 23. A plurality of spray nozzles 24 are provided. However, only one spray nozzle 24 may be provided.

The supply port 20 takes in air cooled by the mist of 60 in the space partitioned by the air dome formed by the boundary line 61 extending in the direction of the airflow blown downward from each outlet 22. The temperature is arranged so as to be equal to or lower than a predetermined temperature with respect to the temperature of the outside environment.

Two or more supply ports 20 are arranged. However, only one supply port 20 may be provided.

The rear duct 40 is arranged adjacent to the supply duct 21 and on a surface on which the supply port 20 is not installed. The surface on which the supply port 20 is not installed is, for example, at least one surface on the back surface or the side surface of the supply duct 21 when the supply port 20 is installed in front of the supply duct 21 as shown in FIG. The rear duct intake port 41 is provided below the rear duct 40, and two or more are arranged so as to take in air. However, the rear duct intake port 41 is 1
Only one may be provided. The rear duct exhaust port 42 is provided above the rear duct 40, and is installed in the rear duct 40 so as to exhaust the air warmed by sunlight. A plurality of rear duct exhaust ports 42 may be provided, or only one may be provided.

The top surface duct 50 may have a part of the top surface duct 50 inclined on a surface adjacent to the outlet duct 23 and where the outlet 22 is not installed so as to match the shape of the outlet duct 23. .. The surface on which the outlet 22 is not installed is, for example, at least one surface of the top surface or the side surface of the outlet duct 23 when the outlet 22 is installed on the lower surface of the outlet duct 23 as shown in FIG. .. Further, the inclination of the top surface duct 50 and the outlet duct 23 is such that the angle formed by the top surface duct 50 and the horizontal plane of the outlet duct 23 is 90 degrees or more and less than 180 degrees (relationship that the inclination increases to the right in FIG. 1). Is desirable. Further, one end of the top duct 50 has a first top duct opening 53 communicating with at least one rear duct exhaust port 42, and the other end of the top duct 50 has a second top duct opening. It has a portion 54.

Further, the total opening area of the supply port 20 is larger than the total opening area of the outlet 22.

Further, the blower 30 may be installed at any position of the supply duct 21 or the outlet duct 23 as long as it is on the downstream side of the air taken in from the supply port 20 and is on the air passage leading to the outlet 22.

[motion]
Hereinafter, the operation and operation of the cooling device 10A according to the first embodiment will be described with reference to FIGS. 1 to 3.

When the blower 30 operates, an air flow that flows in from the supply port 20 and blows out from the air outlet 22 through the supply duct 21 is generated. Here, not only cold air but also unevaporated fog (water droplets) exists in the space 60 partitioned by the air dome. Since the supply duct 21 is a vertical duct, water droplets having a relatively large particle size contained in the air flowing in from the supply port 20 fall and are removed by their own weight, so that the particle size is relatively large from the outlet 22. Can prevent large water droplets from blowing out. On the other hand, water droplets having a relatively small particle size in the mist contained in the air flowing in from the supply port 20 evaporate in the process of passing through the supply duct 21, and the temperature of the air blown out from the air outlet 22 can be lowered.

The mist ejected from the spray nozzle 24 is suppressed from flowing out of the space 60 partitioned by the air dome by the air flow blown from the air outlet 22, and stays in the space 60 and evaporates. The heat of vaporization of this mist cools the air in the space 60.

The supply port 20 is arranged at a position where the air in the space 60 partitioned by the air dome is taken in. Therefore, the air cooled by the heat of vaporization of the mist described above flows in from the supply port 20. The air is blown out from the outlet 22 again and cooled by the heat of vaporization of the mist as described above. That is, the air in the space 60 partitioned by the air dome is repeatedly cooled by the heat of vaporization of the mist. As a result, the amount of temperature decrease of the air in the space 60 can be increased.

By circulating the air in the space 60 partitioned by the air dome in this way, it is possible to increase the temperature drop of the air in the space 60 with a relatively small amount of spray (that is, the amount of water used). can. This is because, in order to increase the amount of temperature decrease of the air in the space 60 without circulating the air in the space partitioned by the air dome, a large amount of mist is ejected in order to increase the amount of heat of vaporization per unit volume. This is because it is necessary to do (that is, use a large amount of water).

In the rear duct 40 adjacent to the supply duct 21, the air warmed in the rear duct 40 by sunlight causes natural convection due to the enthusiast effect, air flows in from the rear duct intake port 41, and is exhausted from the rear duct exhaust port 42. Will be done. As a result, the amount of heat received from the rear duct 40 to the supply duct 21 is reduced, so that the temperature rise of the air in the supply duct 21 can be suppressed.

Further, the air of the top duct 50 warmed by the sunlight is attracted by the air discharged from the rear duct exhaust port 42, and the air sucked from the second top duct opening 54 is the first heaven. It passes through the surface duct opening 53 and is discharged to the outside of the machine. As a result, the amount of heat received from the top duct 50 to the outlet duct 23 is reduced, and the temperature rise of the air in the outlet duct 23 can be suppressed.

Further, when air is taken in from the supply port 20, the total area of the supply port 20 is larger than the total area of the outlet 22, so that the suction wind speed is slower than the blow air speed. As a result, the unevaporated fog (water droplets) in the air is less likely to be taken in from the supply port 20, and the evaporation of the fog can be further promoted and the air temperature can be lowered.

Therefore, even in an environment where the outside air temperature is high, the amount of decrease in the temperature of the air in the space can be increased.

The cooling device 10A of the present embodiment includes an outlet 22 through which air flows out, an outlet duct 23 for conveying air in a substantially horizontal direction, a supply port 20 in which air flows in, and a supply port. The supply duct 21 that supplies the air flowing in from the 20 to the outlet duct 23 upward, the blower 30 arranged in the supply duct 21 or the outlet duct 23, and the air that is provided in the outlet duct 23 and blows downward from the outlet 22. A spray nozzle 24 for ejecting mist toward the airflow space formed by the flow is provided, and the supply port 20 is arranged at a position for sucking the air flow downward from the outlet 22 and is adjacent to the supply duct 21. In addition, a rear duct 40 arranged on a surface where the supply port 20 is not installed, a rear duct intake port 41 below the rear duct 40, and a rear duct exhaust port 42 above the rear duct 40 are provided, and the outlet duct 23 is provided. A top duct 50 is provided adjacent to and on a surface where the air outlet 22 is not installed, and one end of the top duct 50 is a first top duct opening 53 that communicates with the rear duct exhaust port 42. The other end of the top surface duct 50 has a second top surface duct opening 54.

For example, as shown in FIGS. 1 to 3, by installing the opening of the supply port 20 on the upstream side of the supply duct 21, it is formed by the boundary line 61 extending in the direction of the air flow downward from the air outlet 22. The supply port 20 can be arranged at a position where air is taken in 60 in the space partitioned by the air dome.

<Embodiment 2>
As described in the first embodiment, when the air is installed in a place where the sunlight is strong, the supply duct 21 or the outlet duct 23 is warmed by the heat received by the sunlight, and the air taken in from the supply port 20 is conveyed to the outlet 22. It is possible that the air temperature will rise due to heat exchange during the process.

When the sunlight is strong, the air in the rear duct 40 and the top duct 50 is used by using a part of the air volume of the blower 30 in order to improve the exhaust performance of the hot air in the rear duct 40 and the top duct 50. It is desirable to increase the air volume to improve the heat insulation performance. Therefore, a configuration for improving the heat insulating performance of the back duct 40 and the top duct 50 will be described in the second embodiment.

[Configuration of cooling device 10B]
FIG. 4 is a diagram showing the configuration of the cooling device 10B according to the second embodiment. FIG. 4 is a cross-sectional view of the side surface of the cooling device 10B. The same reference numerals are used for the same components as those in FIG. 1, and detailed description thereof will be omitted.

In FIG. 4, a top duct inclined portion 51 is provided in the middle of the top duct 50, and a top duct intake port 55 opened to the outlet duct 23 is arranged in the top duct inclined portion 51.

[motion]
Hereinafter, the operation and operation of the cooling device 10B according to the second embodiment will be described with reference to FIG.

When the sunlight is strong, in the rear duct 40 adjacent to the supply duct 21, the air warmed in the rear duct 40 is naturally convected due to the enthusiast effect, and the air flows in from the rear duct intake port 41 to flow into the rear duct. Heat is exhausted from the exhaust port 42.

At this time, as for the air of the top duct 50 warmed by the solar radiation, a part of the air blown from the blower 30 to the blowout duct 23 flows in from the top duct intake port 55, and the slope of the top duct inclined portion 51. The airflow is distributed by the collision flow to, one is discharged from the first top duct opening 53, and the other flows to the second top duct opening 54. The air discharged from the first top duct opening 53 further attracts the air discharged from the rear duct exhaust port 42, and is discharged to the outside of the machine while increasing the velocity of the air flow in the rear duct 40. .. As a result, the amount of heat received from the top duct 50 to the outlet duct 23 and the amount of heat received from the rear duct 40 to the supply duct 21 are reduced.

As a result, even when the sunlight is strong, the amount of air in the rear duct 40 and the top duct 50 is increased to improve the heat insulating performance, and the amount of heat received by the air passing through the supply duct 21 and the outlet duct 23. Can be reduced.

Therefore, even when the sunlight is strong, the rise in the air temperature of the rear duct 40 and the top duct 50 is suppressed, the temperature rise of the air flowing in from the supply port 20 is suppressed, and the mist ejected causes the air dome. The amount of temperature decrease of the air in the blocked space 60 can be increased.

<Embodiment 3>
When installed in a place where the natural wind blowing from the side is strong, the high temperature air of the outside air may be mixed with the cold space formed by the spray of fog.

When the blower 30 is provided between the supply port 20 and the air outlet 22, the air volume of the blower 30 is increased in order to increase the effect of blocking the natural wind blown from the side by the air blown from the air outlet 22. It is desirable to let it. Therefore, the configuration for blocking the natural wind blown from the side by the air blown from the outlet 22 will be described in the third to fourth embodiments.

[Configuration of cooling device 10C]
5 and 6 are views showing the configuration of the cooling device 10C according to the third embodiment. FIG. 5 is a front view of the cooling device 10C. FIG. 6 is a rear view of the cooling device 10C. The same reference numerals are used for the same components as those in FIG. 1, and detailed description thereof will be omitted.

In FIG. 5, in the cooling device 10C, two blowers 30A are arranged in parallel with respect to the air flow in the air passage from the supply port 20 to the air outlet 22.

In FIG. 5, a plurality of three or more blowers 30A may be provided in parallel.

[motion]
Hereinafter, the operation and operation of the cooling device 10C according to the third embodiment will be described with reference to FIGS. 5 and 6.

The air that flows in from the supply port 20 and reaches the blower 30A through the supply duct 21 is distributed, sucked into the two blowers 30A, boosted, and blown out.
As a result, even when the natural wind blown from the side is strong, the air flow rate increases due to the parallelization of the blowers, and the air flow velocity from the outlet 22 becomes faster. As a result, the effect of blocking the natural wind blown from the side by the blown air is enhanced, so that it is possible to further prevent the high temperature air of the outside air from being mixed with the cold space formed by the spray of fog.

Therefore, even when the natural wind blowing from the side is strong, it is possible to increase the amount of temperature decrease while suppressing the increase in the humidity of the air in the space.

<Embodiment 4>
[Configuration of cooling device 10D]
FIG. 7 is a diagram showing the configuration of the cooling device 10D according to the fourth embodiment. FIG. 7 is a cross-sectional view of the side surface of the cooling device 10D. The same reference numerals are used for the same components as those in FIG. 1, and detailed description thereof will be omitted.

In FIG. 7, in the cooling device 10D, two blowers 30B are arranged in series with respect to the air flow in the air passage from the supply port 20 to the air outlet 22.

In FIG. 7, a plurality of three or more blowers 30B may be provided in series.

[motion]
Hereinafter, the operation and operation of the cooling device 10D according to the fourth embodiment will be described with reference to FIG. 7.

The air that flows in from the supply port 20 and reaches the blower 30B through the supply duct 21 is sucked into the first blower 30B, boosted, and blown out. Next, it is sucked into the second blower 30B, further boosted, and blown out.
As a result, even when the natural wind blowing from the side is strong and the sunlight is strong, the air from the outlet 22 does not significantly increase the air flow rate in the duct due to the increase in the static pressure inside the machine due to the serialization of the blowers. The flow velocity becomes faster. As a result, the effect of blocking the natural wind blown from the side by the blown air is enhanced, and since the air flow rate when passing through the duct does not increase, the amount of heat exchange with the members constituting the air passage does not increase, and the blown air is blown out. While preventing the rise of air, it is possible to further prevent the high temperature air of the outside air from being mixed with the cold space.

Therefore, even when the natural wind blowing from the side is strong and the sunlight is strong, the amount of temperature decrease of the air in the space can be increased.

The above embodiments are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

The present invention is suitable for use in a cooling device that blows mist into outdoor and semi-outdoor spaces to cool the outdoor and semi-outdoor spaces.

10A, 10B, 10C, 10D Cooling device 20 Supply port 21 Supply duct 22 Blow-out duct 23 Blow-out duct 24 Spray nozzle 30, 30A, 30B Blower 40 Rear duct 41 Rear duct Intake port 42 Rear duct Exhaust port 50 Top surface duct 51 Top surface Duct slope 53, 54 Top duct opening 55 Top duct intake

Claims (5)

The outlet where the air flows out and
An outlet duct provided with the above-mentioned outlet and carrying air in a substantially horizontal direction,
The supply port where air flows in and
A supply duct that supplies the air flowing in from the supply port upward to the outlet duct,
With the blower arranged in the supply duct or the outlet duct,
A spray nozzle provided in the outlet duct and ejects mist toward an air flow space formed by an air flow ejected downward from the outlet is provided.
The supply port is arranged at a position where the air flow blown downward from the air outlet is sucked.
A rear duct arranged adjacent to the supply duct and on a surface on which the supply port is not installed,
Below the rear duct, there is a rear duct intake port,
A rear duct exhaust port for discharging the air in the rear duct to the outside of the rear duct is provided above the rear duct.
A top duct is provided adjacent to the outlet duct and arranged on a surface on which the outlet is not installed.
One end of the top duct communicates with the rear duct exhaust port, and the air in the top duct is discharged to the atmosphere together with the air in the rear duct discharged from the rear duct exhaust port . It has a top duct opening and
The other end of the top surface duct is characterized by having a second top surface duct opening.
Cooling system. The cooling device according to claim 1, wherein the opening area of the supply port is larger than the opening area of the air outlet. Claim 1 or 2 has a top surface duct inclined portion in the middle of the top surface duct, and has a top surface duct intake port opened to the outlet duct in the top surface duct inclined portion. The cooling device described in. The cooling device according to any one of claims 1 to 3, wherein at least two of the blowers are arranged in parallel with respect to the flow of airflow. The cooling device according to any one of claims 1 to 3, wherein at least two of the blowers are arranged in series with respect to the flow of airflow.

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