Computer room air conditioning unit
An enclosed air conditioning unit includes a filter section and a cooling section through which intake air passes before being discharged into a space within a building. The orientation of the filter section and cooling section is substantially vertical, and the airflow path through the filter section and the cooling section is substantially horizontal, resulting in reduced face velocities across these components, thereby increasing filtration efficiency and cooling effectiveness, while allowing the physical size and configuration of the air conditioning unit's enclosure to be the same as or smaller than the enclosures for conventional air conditioning units having comparable or lower performance.
1. An air conditioning unit for use in a building space which is occupied by electrical equipment comprising:
(a) an enclosure having a first wall, a second wall opposite the first wall, and a primary air intake in an upper region of the enclosure;
(b) an air treatment component assembly comprising a filter section and a direct evaporative cooling section installed in parallel juxtaposition and mounted vertically within the enclosure so as to define a first chamber between the vertically mounted component assembly and the enclosure's first wall and a second chamber between the vertically mounted component assembly and the enclosure's second wall;
such that air entering the primary air intake from outside the enclosure will flow, in sequence, vertically downward within the first chamber, meet with a resistive barrier at the vertically mounted filter section, thereby equalizing pressure over the entire surface of the vertically mounted filter section, and then pass horizontally through the vertically mounted component assembly into the second chamber, and vertically downward within the second chamber toward a discharge outlet in a lower region of the enclosure.
2. The air conditioning unit as in claim 1 wherein a bypass air intake is provided in the upper region of the enclosure, such that air entering the bypass air intake from outside the enclosure will flow vertically downward within the second chamber so as to mix with air flowing horizontally into the second chamber after passing through the vertically mounted component assembly.
3. The air conditioning unit as in claim 2 , further comprising an intake damper for regulating the flow of air through the bypass air intake.
4. An air conditioning unit for use in a building space which is occupied by electrical equipment comprising:
(a) an enclosure having a first wall, a second wall opposite the first wall, and a primary air intake in a lower region of the enclosure;
(b) an air treatment component assembly comprising a filter section and a direct evaporative cooling section installed in parallel juxtaposition and mounted vertically within the enclosure so as to define a first chamber between the vertically mounted component assembly and the enclosure's first wall and a second chamber between the vertically mounted component assembly and the enclosure's second wall;
such that air entering the primary air intake from outside the enclosure will flow, in sequence, vertically upward within the first chamber, meet with a resistive barrier at the vertically mounted filter section, thereby equalizing pressure over the entire surface of the vertically mounted filter section, and then pass horizontally through the vertically mounted component assembly into the second chamber, and vertically upward within the second chamber toward a discharge outlet in an upper region of the enclosure.
5. The air conditioning unit as in claim 4 wherein a bypass air intake is provided in the lower region of the enclosure, such that air entering the bypass air intake from outside the enclosure will flow vertically upward within the second chamber so as to mix with air flowing horizontally into the second chamber after passing through the vertically mounted component assembly.
6. The air conditioning unit as in claim 5 , further comprising an intake damper for regulating the flow of air through the bypass air intake.