A disc drive system having a rotating disc storage device and a base housing with a sealed internal heat transport structure containing a working fluid. The rotating disc storage device is disposed on the base housing and has at least one heat-generating component in a heat exchange relationship with the base housing. The heat transport structure is formed as a cavity or at least one fluid passage arranged radially, in parallel, as a matrix, or a serpentine channel. Absorbed heat vaporizes the working fluid. The vapor transports the heat from a heat transport structure evaporator section near a relatively hot location of the base housing, to a heat transport structure condenser section near a relatively cooler location of the base housing, where the vapor condenses to liquid and releases the heat. The liquid working fluid is drawn by capillary action from the condenser section back to the evaporator section, aided by a wicking structure. The heat transport structure is formed in the base housing by drilling, casting, machining or embedding heat pipes.

A computer system uses a large heat sink to provide noiseless cooling, thereby avoiding the need for a conventional cooling fan that can be very noisy. The heat sink forms a part of a chassis that contains the motherboard and hard drive of the computer. The motherboard and hard drive are mounted in the chassis to provide thermal conduction from the microprocessor on the motherboard and from the hard drive to the heat sink, which dissipates the heat in the ambient air. Enhanced EMI shielding is provided by placing a shroud with vented top and bottom over the chassis containing the motherboard and the hard drive.

An industrial computer without a fan is provided. The industrial computer comprises an aluminum case including a plurality of top fins projected toward a vertical direction and a plurality of side fins projected toward a horizontal direction; a motherboard including a plurality of heat-generating members such as CPU and north-bridge chipset formed thereon; and a radiating member having a top in contact with an inner surface of the case and a bottom rested upon the heat-generating members.

A computer has a casing that accommodates a main board having a heat generating component that generates heat therein. The computer includes an internal heat discharging part disposed in the casing and coupled with the main board to discharge a first portion of the heat generated by the heat generating component, an external heat discharging part provided on an external surface of the casing to discharge a second portion of the heat generated by the heat generating component, and a heat transmission part to transmit the first and second portions of the heat generated by the heat generating component to the internal and the external heat discharging parts, respectively, such that the first and second portions of the heat generated from the heat generating component is discharged through the internal and the external heat discharging parts, respectively. Accordingly, the computer has a simple structure and assembly and an improved heat discharging efficiency.

Disclosed is an electric power steering apparatus having an electronic control device for controlling motor current based on electric signals inputted from a torque sensor of an automobile and a motor for generating steering power. The electronic control device includes a PCB; a metal substrate formed on a lower side of the PCB in a plate shape while being perpendicular to the PCB; a heating device having a terminal coupled to the PCB and a body coupled to a front surface of the metal substrate; and a radiation plate spaced a predetermined distance from the PCB and having a coupling unit formed on an upper surface of the radiation plate, the metal substrate being coupled to the coupling unit. The body of the heating device is coupled to the metal substrate, which is perpendicular to the PCB, and the metal substrate is coupled to the coupling unit on the upper surface of the radiation plate for improved radiation function.