JPS6119890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is useful for installing a fan coil unit that can be individually adjusted and controlled as an air conditioner in each room, such as in a hospital room, examination room, or clinic room. This invention relates to an air conditioning system that aims to reduce bacteria floating in the air and improve the indoor environment.

Conventionally, in indoor air conditioning systems for hotels, hospitals, etc. that have many small rooms, the minimum amount of outside air required for the occupants in each room is produced using air conditioner a, as shown in the drawing. The air is cooled and dehumidified so that it has the same dew point temperature as the primary air b, and is supplied indoors as primary air b.The fan coil unit c installed in each room removes all of the indoor latent heat load and the remainder of the sensible heat removed by the primary air b. In order to remove this, the indoor temperature and humidity are controlled by cooling and dehumidifying the indoor air d.

However, when dehumidifying indoor air, condensed water and water droplets are generated on the air cooling coil e of the fan coil unit c and its fins f, and this increases and collects in the drain pan g on the bottom surface, and is discharged outdoors through the discharge pipe h. It is necessary to eliminate condensed water and water droplets from the coil e,
As the fan F and drain pan G adhere to each other, a large number of bacteria grow in these adhering parts, and this is carried along with the air by the fan I and scattered indoors, resulting in a significant increase in the number of airborne bacteria in the indoor air, deteriorating the environment. Was.

The present invention is an improvement on this, in which the minimum amount of primary air necessary for the occupants is supplied indoors, and the indoor air is conditioned using a fan coil unit installed indoors. In addition to using conditioned air that has been cooled and dehumidified until all indoor latent heat load can be removed by an air conditioner,
It is characterized in that cold water set at a temperature 2°C lower than the indoor air dew point temperature is circulated through the air cooling coil of the fan coil unit to prevent water droplets from condensing on the air cooling coil and its fins.

Next, embodiments of the present invention will be described.

The minimum amount of primary air b required for the occupants is the conditioned air that has been cooled and dehumidified by an air conditioner a installed outside until all the latent heat load in the room is removed, and then a fan coil unit c installed indoors is used. is to remove all the residual sensible heat removed from the indoor sensible heat load by primary air b, and the air cooling coil e of the fan coil unit c is
Cold water at a low temperature was circulated to prevent water droplets from forming on the surface of the coil e and its fins f due to condensation.

In FIG. 2, j is the indoor air inlet, k is the filter, l is the air outlet, and m is the cold water circulation pipe.

According to the present invention, since no water droplets are generated by condensation on the air cooling coil of the fan coil unit or its fins, the generation and reproduction of bacteria is eliminated, and the number of bacteria floating in the indoor air is significantly reduced, improving the environment. Moreover, the mechanism of the fan coil unit eliminates the need for drain pans and discharge pipe equipment, and there is no need to consider pipe slopes, overflow from the drain pan, etc., making the fan coil unit easy to install.Furthermore, the cold water supply temperature is relatively high. It has various effects, such as less heat loss from cold water, and because the air cooling coil is dry, air pressure loss is less and cleaning is easier.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an air conditioning system, and FIG. 2 is a sectional view showing an example of a fan coil unit. a...Air conditioner for primary air, b...Primary air, c...Fan coil unit installed indoors, d...Indoor air, e...Air cooling coil, f
...Coil fin, g...Drain pan, h...
Drain discharge pipe, i...Blower.

Claims (1)

[Claims] 1 In a system in which indoor air is conditioned by a fan coil unit installed indoors while supplying the minimum amount of primary air necessary for the occupants indoors, the indoor latent heat load is generated by an outdoor air conditioner as the primary air. In addition to using conditioned air that has been cooled and dehumidified until completely removed, cold water set at a temperature 2°C lower than the indoor air dew point temperature is circulated through the air cooling coil of the fan coil unit to remove water droplets due to condensation on the air cooling coil and its fins. An indoor air conditioning method characterized by preventing the occurrence of.