# US 5,707,282 A · Fan diffuser

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- Number: US 5,707,282 A
- Document ID: US5707282A
- Status: Granted
- Kind: A
- Application number: 08/608,382
- Filed: 1996-02-28
- Granted: 1998-01-13
- Earliest claimed: 1996-02-28
- Assignees: Hewlett-Packard Company
- Inventors: Brad E. Clements; Theodore R. Santos, II
- Web page: https://patentgrep.com/patent/US5707282A

## CPC

- H05K 7/20172: {Fan mounting or fan specifications}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A cooling system for electronic component cases is disclosed. The system includes a fan diffuser located between the exhaust fan and the exhaust grill formed in an exterior wall of the case. The diffuser allows the grill to vary in both size and shape from the fan, thus allowing the grill footprint to differ from that of the fan. This arrangement allows the grill size to be optimized, taking advantage of the available space on the case wall. The diffuser also allows components to be located between the fan and the case wall portion where the grill is located.

## Claims

### Claim 1

A cooling system for a computer, said cooling system comprising:
a substantially closed container formed of at least a first wall section, said container having an interior and an exterior;
a grill formed in said first wall section, said grill comprising at least one opening extending through said first wall section between said interior and said exterior of said container;
a diffuser located within said container, said diffuser having a first end portion and a second end portion;
said diffuser second end portion being located adjacent said grill;
an air movement device located adjacent said diffuser first end portion; and
wherein said air movement device comprises a plurality of alignment holes, and said diffuser first end portion includes a plurality of posts adapted to engage said alignment holes.

### Claim 2 (depends on 1)

The system of claim 1 wherein said grill comprises a plurality of openings extending through said first wall section between said interior and said exterior of said container.

### Claim 3 (depends on 1)

The system of claim 1 wherein said container is formed of a plurality of wall sections.

### Claim 4 (depends on 1)

The system of claim 1 wherein said first wall section has an interior surface facing said container interior and an exterior surface facing said container exterior.

### Claim 5 (depends on 4)

The system of claim 4 further including a container hinge mechanism located on said interior surface of said first wall section.

### Claim 6 (depends on 5)

The system of claim 5 further including a diffuser hinge mechanism located on said diffuser.

### Claim 7 (depends on 6)

The system of claim 6 wherein said diffuser hinge mechanism is adapted to engage with said container hinge mechanism.

### Claim 8 (depends on 7)

The system of claim 7 wherein a bracket is located on said interior surface of said first wall section, and a clip mechanism is located on said diffuser and wherein said clip mechanism is adapted to engage said bracket.

### Claim 9 (depends on 6)

The system of claim 6 wherein said container hinge mechanism comprises a plurality of holes, said diffuser hinge mechanism comprises a plurality of pins, and said plurality of pins are located within said plurality of holes.

### Claim 10 (depends on 1)

The system of claim 1 wherein said diffuser further comprises a plurality of clips adapted to engage said air movement device.

### Claim 11 (depends on 1)

The system of claim 1 wherein said air movement device comprises a fan assembly.

### Claim 12 (depends on 11)

The system of claim 11 wherein said fan assembly includes a fan motor and a pair of electrical wires operatively attached to said fan motor and wherein said diffuser includes a clip adapted to securely hold said wires.

### Claim 13 (depends on 1)

The system of claim 1 wherein said diffuser first end portion comprises a first air flow opening having a first area and said diffuser second end portion comprises a second air flow opening having a second area.

### Claim 14 (depends on 13)

The system of claim 13 wherein said first area is different from said second area.

### Claim 15 (depends on 14)

The system of claim 14 wherein said second area is larger than said first area.

### Claim 16 (depends on 13)

The system of claim 13 wherein said first air flow opening has a shape which differs from the shape of said second air flow opening.

### Claim 17

A diffuser for use in the case of a computer, said diffuser comprising:
a first open end adapted to engage an air movement device, said first open end having a first area;
a second open end adapted to engage a wall section of said case, said second open end having a second area;
a first wall portion;
a second wall portion opposite said first wall portion;
a third wall portion connecting said first wall portion and said second wall portion;
a fourth wall portion opposite said third wall portion, said fourth wall portion also connecting said first wall portion and said second wall portion;
said wall portions each including a first edge portion and a second edge portion;
said first edge portions substantially defining said diffuser first open end and said second edge portions substantially defining said diffuser second open end; and
wherein a diffuser hinge mechanism is located on said diffuser, said diffuser hinge mechanism being adapted to engage with a case hinge mechanism.

### Claim 18 (depends on 17)

The diffuser of claim 17 wherein said diffuser hinge mechanism comprises a plurality of brackets transversely attached to said third wall portion and a hinge pin transversely attached to each of said brackets.

### Claim 19 (depends on 17)

The diffuser of claim 17 further including a clip mechanism attached to said fourth wall portion, said clip mechanism adapted to engage a case bracket.

### Claim 20 (depends on 17)

The diffuser of claim 17 further including a plurality of clips adapted to engage said air movement device.

### Claim 21 (depends on 20)

The diffuser of claim 20 wherein said clips are attached to said first edges of said third and fourth wall portions.

### Claim 22 (depends on 17)

The diffuser of claim 17 further including a plurality of posts adapted to engage alignment holes in said air movement device.

### Claim 23 (depends on 17)

The diffuser of claim 17 wherein said second area is larger than said first area.

### Claim 24

A method of circulating air through the case of a computer, comprising the steps of:
providing a grill in a wall of said case, said grill comprising a plurality of openings and spaces between said openings;
providing an air movement device;
providing a diffuser having an intake opening and an exhaust opening;
locating said diffuser between said air movement device and said grill;
activating said air movement device to cause air to move into said diffuser intake opening, through said diffuser, out of said diffuser exhaust opening and thereafter out of said case through said grill;
slowing said air as it moves through said diffuser;
wherein said grill has a first area and a first shape and said air movement device has a second area and a second shape and including the further step of providing said diffuser exhaust opening having an area and a shape substantially equal to said first area and shape and providing said diffuser intake opening having an area and a shape substantially equal to said second area and shape; and
wherein said first area is larger than said second area.

### Claim 25

A method of circulating air through the case of a computer, comprising the steps of:
providing a grill in a wall of said case, said grill comprising a plurality of openings and spaces between said openings;
providing an air movement device;
providing a diffuser having an intake opening and an exhaust opening;
locating said diffuser between said air movement device and said grill;
activating said air movement device to cause air to move into said diffuser intake opening, through said diffuser, out of said diffuser exhaust opening and thereafter out of said case through said grill; and
hingedly attaching said diffuser to said wall of said case.