JPH0812026B2 - Evaporative latent heat type air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaporation latent heat type air conditioner suitable for growing plants to be cooled in buildings such as plants and mushrooms cultivating places, livestock breeding places, various working places and the like.

[0002]

2. Description of the Related Art Conventionally, for example, as a vaporization latent heat type air conditioner for a greenhouse for cultivating plants, a long duct made of a breathable sheet having a large number of pores is laid on the ground in a greenhouse, and a blower and an air blower are provided from one end of the duct. The air containing fine mist is blown into the duct by the atomizer, and the fine mist is vaporized while flowing in the duct to cool the air in the duct by its latent heat. There is known one that is discharged into the inside to perform cooling.

[0003]

However, in the conventional vaporization latent heat type air conditioner described above, the fine mist sent into the duct is almost vaporized by the time it reaches the tip of the duct. Therefore, at the tip of the duct. There is almost no cooling effect, and measures are taken to supply a large amount of fine mist to compensate for this, but there is a drawback that it causes an increase in fuel consumption and water consumption of the water supply pump. This was especially noticeable in long ducted pipes.

The present invention eliminates the drawbacks of the conventional vaporization latent heat type cooling device, and makes it possible to perform a substantially uniform cooling action over the entire length of a duct even with a long duct and to reduce the fuel consumption and water consumption of the water supply pump. And

[0005]

As a means for solving the above problems, the present invention provides a split fiber non-woven fabric having a large number of fine pores made of a hygroscopic synthetic resin substantially evenly near an object to be cooled in a building. The tubular air leak duct formed by the above should be piped, and the tip of the air leak duct should be closed or narrowed, and at the base end of the air leak duct, the air should be blown into the duct to leak from the numerous fine holes to the outside of the duct. A vaporization latent heat type cooling device is proposed in which a blower is connected and a large number of spray nozzles are provided outside the air leakage duct along the length of the duct to spray water on the outer surface of the length of the duct.

In the "split fiber non-woven fabric made of a hygroscopic synthetic resin" of the duct of the present invention, a number of fine cracks are formed in parallel in a polyvinyl alcohol (for example, vinylon) or other hygroscopic synthetic resin film, A split fiber nonwoven fabric is used in which this split fiber is stretched to form split fibers, and the split fibers are crossed vertically and horizontally and fused together to form fine pores between the vertical and horizontal split fibers. .

[0007]

In the present invention, the unvaporized fine mist easily adheres to the outer surface of the air leak duct of the hygroscopic split fiber nonwoven fabric, and the fine mist attached is absorbed by the hygroscopic split fiber nonwoven fabric. The generated water is gradually vaporized by the air discharged from the inside to the outside through the many fine holes of the air leak duct. Embodiments of the present invention will be described below with reference to the drawings.

[0008]

EXAMPLE FIG. 1 shows an example of application to a glass-covered greenhouse (1) for cultivating plants, in which ridges (2) formed on the ground in the greenhouse are planted in two rows as cooling targets (3).
The tubular air leak ducts (4) are arranged parallel to the ridges (2) ... at appropriate positions above the respective intermediate portions of the row of (3) ... And the spray nozzles (6) are placed above the air leak ducts (4). …
, Which are each provided in parallel with the duct (4), and a flexible blower pipe branched from the blower (7) mounted on the upper side wall of the greenhouse (1) to these ducts (4). (8) are connected to each other, and the air blower (7) blows air into each air leak duct (4). The air intake of the blower (7) can be taken from outside the greenhouse or inside the greenhouse by a switching operation.

As shown in FIGS. 2 and 3, the water supply pipe (5) has a spray nozzle (6) protruding downward from the lower surface of the pipe, and is horizontally stretched in the greenhouse (1). Wire (9) ...
Each of the water pipes (5) ...
The hoses (10) connected to a high-pressure water supply pump (not shown) are connected to one end of each of the above, and high-pressure water is supplied into the water supply pipes (5) by the pump. In some cases, except for the pump, the hose (10) ...
May be connected to a tap.

The air leak ducts (4) are long tube-shaped members made of a split fiber non-woven fabric which are made of a hygroscopic polyvinyl alcohol resin film and which have a large number of fine pores substantially evenly. It is closed (11) and is suspended by suspension lines (12) ... Hanging on the water supply pipe (5).

The operation of the above example is as follows. First, when air is pressure-fed into each of the air leak ducts (4) by driving the air blower (7), one air leak duct looks like the air leak duct (4) bulging into a cylindrical shape, and then the air inside the duct (4). Due to the static pressure, the high-pressure air is discharged from the large number of fine holes on the entire circumferential surface of the duct (4) almost uniformly as a breeze. At the same time, when water is pumped into the water supply pipe (5) by driving the pump, fine mist is jetted from the spray nozzles (6) ... ) It is vaporized by touching the breeze emitted from the entire length, and its latent heat cools the surrounding air in the entire length of the duct (4). The cold air will fall and will be supplied to the plants (3) below in a substantially even manner.

In this case, a part of the fine mist from the spray nozzles (6) is blown to the outer surface of the air leak duct (4) without being vaporized, but since the air leak duct is made of a hygroscopic split fiber nonwoven fabric, The unvaporized fine mist easily adheres to the outer surface of the air leak duct (4), and the fine mist attached is absorbed by the hygroscopic split fiber nonwoven fabric. It is gradually vaporized by the air discharged from the inside to the outside through the large number of fine holes, and due to the latent heat, it is repeatedly cooled. Therefore, when the original cooling action is performed for a certain period of time, the high-pressure water supply pump is stopped to interrupt the spraying, and instead, the non-vaporized fine mist adhering to the outer surface of the air leak duct (4) and the absorbed fine mist are vaporized. When a cooling action is performed and the above-mentioned adhering mist and absorbing mist are exhausted, the high-pressure water supply pump is restarted to restart the original cooling action, and this is repeated thereafter. As a result, fuel consumption and water consumption of the high-pressure water supply pump are saved.

The blower (7) in the above example selectively takes in indoor or outdoor air and pressure-feeds it. In addition to this, dry air whose moisture has been removed by a dehumidifier or the like, or dry air which has been dehumidified and cooled by a heat pump or the like. There is also a case where it is taken in and pressure-fed into the duct (4) .... In this case, the vaporization of fine mist is promoted and the cooling effect is improved.

The cooling device of the present invention is particularly effectively used for cooling in a high temperature dry area. For example, when the cooling device of the present invention is arranged in a plant cultivation place such as a vinyl house or a work place such as a simple assembly building, the dry air discharged from the air leakage duct effectively vaporizes the fine mist and performs a sufficient cooling action.

As yet another embodiment, the air leak duct (4) and the spray nozzle (4) are located at a position near the root of the plant between the plants (3), ... (3), which are planted in two rows in the ridge (2). 6) ... An example in which the water supply pipe (5) is arranged in the same manner as the above example is also available.

[0016]

According to the evaporation latent heat type cooling device of the present invention,
Even if a long duct is used, the latent heat of vaporization of fine mist is generated over the entire length of the air leakage duct by supplying a uniform mist of air from many fine holes and supplying a mist from the spray nozzle to the outside of the duct over the entire length of the air leakage duct. The air leakage duct made of hygroscopic split fiber nonwoven fabric adheres and absorbs the unvaporized fine mist to the outer surface, and discharges the adhered fine mist and the absorbed fine mist from inside to outside through the fine holes. Since it is possible to perform the cooling action by being vaporized by the air to be overlapped, it is possible to utilize this to perform continuous cooling while intermittently performing the spray from the spray nozzle, whereby the water supply pump It is possible to reduce fuel consumption and water consumption.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a greenhouse.

FIG. 2 is an enlarged cross-sectional view of a cooling device portion.

FIG. 3 is a partially omitted enlarged side view of a cooling device portion.

[Explanation of symbols]

 4 Leakage duct 6 Spray nozzle 7 Blower

Claims (1)

[Claims] 1. A building near a cooling target in a building,
Has many fine pores made of hygroscopic synthetic resin almost evenly
Tube-shaped air leakage duct made of split fiber nonwoven fabric
Piping the extract, as well as occlusion or stenosis of the distal end of the Mokaze duct, the
At the base end of the air leak duct, the air is blown into the duct and
Connect a blower that should leak air from the pores to the outside of the duct, and inject water on the outside of the above-mentioned air leak duct to the outer surface of the entire length of the duct.
A large number of spray nozzles are installed along the entire length of the duct to atomize.
It was, latent heat of vaporization type cooling apparatus.