摘要:
A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.
摘要:
A heat exchanger allows establishment of first and second flat spaces, namely parallel flat spaces along a reference. The heat exchanger is inserted in a closed circulating loop for coolant. The first and second flat spaces have a cross-section larger than that of a cylindrical duct of the closed circulating loop. These flat spaces serve as a flow passage for the coolant. An increased cross-section enables a reduction in the flow speed of the coolant. The coolant is allowed to slowly flow through the first and second flat spaces. The coolant thus contacts with the first and second plates and the third and fourth plates for a longer time. The heat of the coolant is sufficiently transferred to the first and second plates and the third and fourth plates. The efficiency of heat radiation is enhanced.
摘要:
An intake opening is defined in a printed circuit board inside a fan cover mounted on the printed circuit board. The intake opening has a particular extent inside the fan cover. This intake opening contributes to improvement in the cooling efficiency of a fan as compared with a conventional intake opening. Moreover, the intake opening allows a sufficient space to remain on the front and back surfaces of the printed circuit board inside the fan cover. Electronic components and/or wiring patterns may be disposed in the space. This contributes to disposition of electronic components and/or wiring patterns at a higher density on the printed circuit board.
摘要:
A cooling jacket includes: a flow channel member through which a cooling medium flows, at least a part of which is in contact with an object to be cooled, and which includes a region having a channel cross-sectional area larger than that of any other region; and a projection portion which is provided at a downstream side of the region where the channel cross-sectional area is large.
摘要:
A heat receiver includes a casing defining a flow passage on a thermal conductive plate. The thermal conductive plate is received on an electronic component. The thermal conductive plate serves to transfer heat to coolant in the flow passage. At least two inflow nozzles extend into the casing to have discharge openings opposed to the upstream end of the flow passage. The coolant flows into the flow passage through the inflow nozzles. At least two streams of the coolant are thus generated in the flow passage. The streams widely expand or spread in the flow passage. The coolant flows through the flow passage without stagnating. The coolant can thus absorb the heat of the thermal conductive plate in an efficient manner. This results in an efficient heat absorption of the heat receiver.
摘要:
An electronic apparatus 100 includes a heat-generating element 1, a heat-radiating plate 4 which is used in heat radiation of the heat-generating element, and a housing 10 which accommodates the heat-generating element and the heat-radiating plate. The heat-radiating plate is disposed between the heat-generating element and a first wall portion 10a of the housing, and a support stage 5 for forming an air layer is disposed between the heat-radiating plate and the first wall portion. Since the heat-insulating effect of the air layer prevents the heat diffused from the heat-radiating plate from being easily conducted to the first wall portion, the formation of a heat spot in the first wall portion can be avoided even when the heat-generating element which generates a large amount of heat is used.
摘要:
A cooling jacket includes: a flow channel member through which a cooling medium flows, at least a part of which is in contact with an object to be cooled, and which includes a region having a channel cross-sectional area larger than that of any other region; and a projection portion which is provided at a downstream side of the region where the channel cross-sectional area is large.
摘要:
A liquid cooling unit includes components such as first and second heat receivers, a heat exchanger, a tank and a pump in an electronic apparatus. The electronic apparatus includes a first enclosure and a second enclosure coupled to the second enclosure for relative movement. The liquid cooling unit is enclosed in the first enclosure. No component of the liquid cooling unit is enclosed in the second enclosure. The liquid cooling unit is thus incorporated in the first enclosure in a facilitated manner. This results in a reduced production cost. The liquid cooling unit can also be removed from the first enclosure in a facilitated manner.
摘要:
An electronic component generates heat in an electronic apparatus. The heat of the electronic component is transferred to a thermal conductive plate of a heat receiver in a liquid cooling unit. The heat is transferred to coolant from the thermal conductive plate. The temperature of the coolant rises. The heat exchanger absorbs heat of the coolant. The coolant gets cooled. The heat of the electronic component is also transferred to the printed wiring board. The heat spreads over the printed wiring board through a wiring pattern in the printed wiring board. Since the tank or/and pump is placed at a position outside the printed wiring board, the heat cannot be transferred to the tank or/and the pump. This results in prevention of rise in the temperature of the coolant in the tank or/and the pump. The efficiency of heat radiation can thus be enhanced.
摘要:
A centrifugal fan assembly has a fan with a number of vanes at a peripheral edge of a rotor, a motor, arranged coaxially to the inside of the rotor, that rotates the fan, and a casing that houses the fan and the motor. The casing has an air inlet in the direction of a rotating shaft of the fan, and an air outlet in a radial direction. A first part of the casing near the air inlet is arranged relatively towards a center of the casing as compared to the other part of the casing. The motor is mounted on the first part.