Abstract: An information processing apparatus includes a housing that a slot where an electronic assembly is inserted and extracted and a power supply unit. A first air inlet is present in a corner in a front portion of the electronic assembly and includes a space to store an engaging mechanism that engages with the slot. A duct is arranged between the slot and the housing and includes a second air inlet in a front portion of the housing. A fan is arranged between the slot and the power supply unit. The first inlet communicates with the duct and, by the fan, air from the first air inlet and the second air inlet is sent to the power supply unit through the duct.

Abstract: An information processing apparatus includes a heat generation device arranged behind a slot where an electronic assembly is inserted and extracted, an air inlet that is present in a corner in a front portion of the electronic assembly and includes a space to store an engaging mechanism that engages with the slot, and a duct that bypasses the electronic assembly from the air inlet and leads to the heat generation device.

Abstract: An information processing apparatus includes a lower unit having a circuit board on which first electronic components are mounted and also having a chassis in which the circuit board is mounted at a bottom, an upper surface of the chassis being open; and an upper unit having a tray member detachably attached to the chassis and also having second electronic components mounted at a bottom of the tray member, the upper unit being stacked on the lower unit; wherein the upper unit has a connector board attached to the tray member, having a first and a second connectors, the first connector being fitted to a board-side connector on the circuit board, the second connector being electrically connected to the second electronic components, and an opening is formed at the bottom of the tray member, the first connector and the board-side connector being mutually fitted through the opening.

Abstract: An information processing apparatus includes a lower unit having a circuit board on which first electronic components are mounted and also having a chassis in which the circuit board is mounted at a bottom, an upper surface of the chassis being open; and an upper unit having a tray member detachably attached to the chassis and also having second electronic components mounted at a bottom of the tray member, the upper unit being stacked on the lower unit; wherein the upper unit has a connector board attached to the tray member, having a first and a second connectors, the first connector being fitted to a board-side connector on the circuit board, the second connector being electrically connected to the second electronic components, and an opening is formed at the bottom of the tray member, the first connector and the board-side connector being mutually fitted through the opening.

Abstract: An apparatus includes a cooling device that cools, by using refrigerant, heating components mounted over a circuit board and has different use-temperature conditions, wherein the circuit board is provided with a first area in which a first group of heating components having an operating condition of generating heat less than a given-heat quantity and operating in a temperature range lower than a first temperature is arranged, a second area in which a second group of heating components having an operating condition of generating heat equal not less than the given-heat quantity and operating in a temperature range between the first temperature and a second temperature exceeding the first temperature is arranged, and a third area in which a third group of heating components having an operating condition of generating heat equal to or less than the given-heat quantity and operating in a temperature range exceeding the second temperature is arranged.