# US 9,521,783 B2 · Computer room air conditioning unit

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- Number: US 9,521,783 B2
- Document ID: US9521783B2
- Status: Granted
- Kind: B2
- Application number: 14/510,172
- Filed: 2014-10-09
- Published: 2015-03-05
- Granted: 2016-12-13
- Earliest claimed: 2012-05-12
- Assignees: Lex Industries Ltd.
- Applicants: Lex Industries Ltd.
- Inventors: Lindsey Leckelt; Ryan Vetsch; Dan Leckelt; Neil Merkel; Don Leckelt
- Web page: https://patentgrep.com/patent/US9521783B2

## CPC

- H05K 7/20745: {within rooms for removing heat from cabinets, e.g. by air conditioning device}
- F24F 11/0001: {for ventilation (F24F11/30 takes precedence)}
- H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides}
- H05K 7/2029: {using a liquid coolant with phase change in electronic enclosures (in cabinets of standardized dimensions H05K7/20536; in server cabinets H05K7/20709; in vehicle electronic casings H05K7/20845; in power control electronics H05K7/2089; in displays H05K7/20954)}
- H05K 7/20709: {for server racks or cabinets; for data centers, e.g. 19-inch computer racks}
- Y02B 30/54: Free-cooling systems
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

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.

## Claims

### Claim 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 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

The air conditioning unit as in claim 2, further comprising an intake damper for regulating the flow of air through the bypass air intake.

### Claim 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 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.

### Claim 5 (depends on 4)

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.

### Claim 6 (depends on 5)

The air conditioning unit as in claim 5, further comprising an intake damper for regulating the flow of air through the bypass air intake.