Indirect Evaporative Cooling Apparatus

Abstract

An indirect evaporative cooling apparatus in which a substrate is disposed between a wet channel used to induce an evaporation phenomenon and a dry channel through which cooled air passes, the wet channel and the dry channel are arrayed in layers in an alternating manner, the substrate is cooled by the evaporation phenomenon occurring within the wet channel, substrates that cool the air in the dry channel by heat transfer are layered and disposed, wherein the substrate forming the wet channel and the dry channel is formed by a plastic sheet; a substrate is used in which a plurality of projections are formed as spacers on one side of the substrate of the wet channel and the dry channel, and numerous projections are formed by emboss-patterning on the surface of the substrate on which the spacers are formed and dimples are integrally formed on a back surface.

Description

TECHNICAL FIELDThe present invention relates to an indirect evaporative cooling apparatus in which a wet cooling zone (wet channel) layer and a cooled air zone (dry channel) layer used in an indirect evaporative cooler are alternately disposed, and only sensible heat in the air in the cooled air zone is cooled.BACKGROUND ARTWhen air is humidified, an evaporation phenomenon occurs and latent heat is removed, thereby lowering the temperature of the air to its wet-bulb temperature. However, cooled air is humidified at the same time. This principle is widely known as wet cooling by the following patent literatures and the like. Evaporative coolers using this principle are widely manufactured and distributed. For instances where humidification of the air discharged from the cooler is not desired, so-called indirect evaporation coolers are already being manufactured and distributed. The indirect evaporation cooler is a product that uses a system in which a zone in which wet cooling is per...

AI Technical Summary

Benefits of technology

In the indirect evaporative cooling apparatus of the present invention, a plurality of spacers are formed on a surface of a substrate positioned on a border between a wet channel and a dry channel. In addition, numerous projections are formed by embossing on the surface of the substrate surface (forming dimples on the back Surface). Therefore, space allowing air flow can be maintained with certainty. Because surface area is increased by the projections, heat exchange efficiency is excellent. Moreover, as a result of weight reduction due to the use of plastic, the overall indirect evaporative cooling apparatus can be configured to be light in weight.

Because counterflow is used for the air flows within the wet channel and the dry channel, cooled air can be efficiently sent into a room. Furthermore, heat exchange efficiency is increased when a counterflow system is used in which some of the exhaust from the dry channel is returned and sent into the wet channel.

Through use of a porous plastic sheet as the substrate in the indirect evaporative cooling apparatus of the present invention, weight reduction can be achieved. In particular, as a result of a water absorbing structure, such as a woven fabric including a water absorbing agent, being formed on the wet channel side surface of the substrate, efficiency attributed to the evaporation phenomenon is high.

(1) The following data was obtained in comparison with existing perpendicular-type indirect evaporative coolers:

(2) A system in which molded plastic parts are used as the substrates for the wet channel and the dry channel can be used. Mass production is facilitated, and the indirect evaporative cooler can be manufactured at a low cost.

Problems solved by technology

A structure such as this has poor heat efficiency.

The cooling apparatus cannot be installed in an ordinary home.

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