An exhaust air removal system and method for use with a rack or enclosure containing equipment is provided. The system and method are configured for removal of exhaust air vented from equipment during operation to thereby remove heat from the equipment. In one aspect, the system includes a fan unit preferably configured to serve as a back door of an equipment rack or enclosure and configured to provide access to an interior of the rack or enclosure. The fan unit provides multiple fans coupled to internal exhaust ducts that are arranged to draw and to remove exhaust air vented from rack-mounted equipment. The fan unit is further configured to vent exhaust air to an area external to a rack or enclosure, such as an external exhaust duct or plenum. Removal of hot and warm exhaust air vented from rack-mounted equipment enables the equipment to operate effectively, drawing sufficient amounts of cooling air to meet its cooling requirements. The fan unit is constructed for portability and for easy attachment to and removal from a rack or enclosure, providing flexibility in handling equipment exhaust needs.

Exhaust air removal system

A computer system includes a computer rack configured to support a plurality of computer chassis in a computer stack region of the computer rack; a cooling plenum configured to draw air from a back side of a computer chassis supported in the computer rack and exhaust the air through an outlet port; and an airflow control member positioned between the cooling plenum and the computer stack region and providing an impedance to airflow between the computer stack region and the cooling plenum, said airflow control member providing a greater airflow impedance to a first portion of the computer stack region than to a second portion of the computer stack region.

Computer rack cooling system with variable airflow impedance

This relates to the manner in which computers are configured in a given area in order to conserve space and to deal with cooling issues associated with the close housing of a large number of computers. Efficient arrangements for efficiently increasing the density of computer configurations are shown, particularly when used in a network server or host environment.

High density computer equipment storage system

An air removal unit configured for removing exhaust air from an equipment rack or enclosure includes multiple fans to achieve a high airflow capacity while defining a compact and portable structure. The unit removably installs along an exhaust side of an equipment rack or enclosure to provide capabilities for managing the thermal output of equipment, such as servers, CPUs, communications, internetworking and other types of equipment. The unit includes one or more upper fan modules and one or more lower fan modules positioned below the upper fan modules. The upper and the lower fan modules are arranged in a stacked configuration along the depth of the unit with the lower fan modules positioned in an offset orientation relative to the upper fan modules. The stacked configuration and the offset orientation of the fan modules help to incorporate multiple fans with the unit while maintaining the compact and portable design. The unit is further configured to serve as a door of an equipment rack or enclosure to thereby provide access to the unit and the rack or enclosure during operation. The unit can be incorporated with a ventilation system or a cooling air system associated with an equipment room or data center.

Air removal unit

In an electric connection box, even if accuracy of a relative position between a first screw passage hole and a first screw hole, as well as accuracy of a relative position between a second screw passage hole and a second screw hole, is low, the relative positional relation between the first screw passage hole and the first screw hole, as well as the relative positional relation between the second screw passage hole and the second screw hole, can be adjusted because of the provision of a gap between an outer peripheral surface of a constricted engagement portion of a provisionally-placing projection and a hole-defining peripheral surface of a mounting member at the time of mounting a connection box body on the mounting member so that the passage of a first screw through the first screw passage hole and the first screw hole, as well as the passage of a second screw through the second screw passage hole and the second screw hole, can be easily carried out.

Electric connection box

A housing for a desk top personal computer incorporating a novel integrated cooling system. The housing features a cast magnesium chassis that acts as a heat sink that conductively absorbs heat from internal components. A recessed, rectangular, open-sided cooling channel is integrally formed in the bottom of the chassis. A fan is mounted to one end of the cooling channel. A series of fins running lengthwise extends down from the top of the channel. A power supply module, which dissipates heat from a conduction plate along its bottom, is mounted on the top side of the chassis directly above the channel. In operation, the fan draws air into the housing through a series of openings along the top back edge of the chassis. The air passes over the inside surfaces of the chassis, dissipating the relatively small amount of heat generated by the components mounted thereon and flows into the cooling channel. The air flows through the channel and across the surfaces of the fins extending down from the top of the channel, dissipating the heat generated by the power supply mounted directly above.

Tim O. Lau

Papers

Housing cooling system