Abstract: A heat dissipation apparatus includes a heat sink (30) and a fan (50) mounted on the heat sink. The heat sink includes a plurality of radial fins (311, 331). An air channel (312, 332) is defined between every two adjacent fins. Each of the fins includes a main body (331, 331) and an airflow guiding flange (314, 334) extending upwardly and outwardly from a top side of the main body. The airflow guiding flange is twisted in a radial direction, such that an included angle between the airflow guiding flange and the main body is gradually increased from an outer side (318, 338) towards an inner side (317, 337) of the main body. The fan is used to generate airflow towards the heat sink. The airflow is guided into the air channels between the fins via the airflow guiding flanges.

Abstract: A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower.

Abstract: A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower.

Abstract: A thermal management system (201) is provided which comprises a first heat spreader (205) comprising a heat pipe material, a plurality of fins (217) disposed on said first heat spreader, and a synthetic jet actuator (209) adapted to direct a synthetic jet between at least a pair of said plurality of fins.

Abstract: An active heat sink is described for use in the transfer of heat from a heat generating device such as a semiconductor chip and the like with a heat sink having an embedded fan surrounded by a plurality of heat conducting flow augmenting rings separated by apertures through which a radially inward flow arises and with the rings being sufficiently axially separated to enable fan propeller tip vortices to penetrate the axial spacings so as to cause a substantial cooling of annular ring regions so as to raise the overall heat transfer coefficient of the active heat sink in a significant manner. Several embodiments are described.

Abstract: Heat transfer in non-turbulent highly viscous mixed-phase flowing streams can be improved by altering flow characteristics using spiral-shaped elements to eliminate boundary phenomena. The spiral-shaped element promotes helical or spiral flow paths to reduce or eliminate temperature gradients associated with laminar flow characteristics.

Abstract: A spirally wound tube heat exchanger 10 article that receives a heat exchange fluid and its method of manufacture. In one embodiment, the exchanger 10 has one or more spirally-wound layers 12 of a tube 14. In some embodiments, the layers are circular, oval or rectangular with radiused corners. An elongate spacer member 24 has forwardly 26 and rearwardly 28 facing edges. Defined within those edges are engagement surfaces 30 that detachably retain the tube 14.

Abstract: A plug flow reactor having an inner shell 27 surrounded by outer shell 21 and having at least one annular flow passage 35 therebetween can be used to prepare compositions, including polymers. The plug flow reactor also includes inlet port 36, an outlet port 37 and a plurality of exchanger tubes 26 wherein the exchanger tubes are in fluid communication to the at least one annular flow passage. Polystyrene and high impact polystyrene can be prepared using the reactor.

Abstract: A rotary combustion engine (12) with a self-cooling system comprises a heat exchanging interface for discharging excess heat from the rotary combustion engine (12), and a direct drive fan (44) integrated on the rotary engine output shaft (26) for providing a flow of forced air over the heat exchanging interface.

Abstract: Disclosed herein is a turn-fin condenser. The turn-fin condenser employs a turn-fin tube adhesively wound in a spiral shape around an outer surface of the tube in which refrigerant flows. The condenser comprises a coil type turn-fin tube 10 wound in a coil shape and fixed by inner and outer brackets 20 and 30 surrounding an outer peripheral surface of the coil type turn-fin tube, a motor 40 positioned in an inner space formed by the coil type turn-fin tube 10, a blowing fan 50 for taking ambient air in the coil type turn-fin tube 10 after being driven by the motor 40, and a tube wall 80 spirally wound with tube 11 extending out of the inner and outer brackets 20 and 30 at the rear side of the coil type turn-fin tube 10. The turn-fin condenser is easily manufactured and allows a greater quantity of air contact with turn-fins, thereby enhancing heat exchange efficiency.

Abstract: A heat sink removes heat from an electronic device and comprises a base, a lid. An inner ring of first fins extend radially outwardly first length from an inner circle and extend axially a first height from the top surface of the base, and an outer ring of second fins extend radially inwardly a second length from an outer periphery and extend axially a second height from the top surface of the base. A confining plate extends radially above the fins and is spaced below the bottom surface of the lid whereby coolant fluid flows from an inlet opening of the lid through the center opening of the confining plate and radially outwardly through the fins and upward around the outer edge of the confining plate and into the space above the confining plate to an outlet opening. A nozzle having a throat is disposed above the lid and extends below the lid to the confining plate. A flow diverter extends upwardly from the top surface of the base and into and through the throat of the nozzle.

Abstract: In a heat exchanger, a plurality of heat conductive pipes forming first passages are provided between an outer wall plate and an inner wall plate. Air flows through the first passages. Second passages are formed between the heat conductive pipes. An exhaust gas flows through the second passages. Each of the heat conductive pipes has opposite walls limiting the passage width of the first passage. The walls are formed along involute curves. The second passages are formed by providing adjacent heat conductive pipes along the involute curves.

Abstract: A water-cooling heat exchanger and a heat-dissipating device are mounted on a heat-generating element of a computer for rapidly guiding and dissipating the heat generated by the heat-generating element. A water-cooling head, a pump and a heat-dissipating fan are stacked up, and an annular heat exchanger is used to surround the above components, thereby to reduce the space of the whole construction to a lowest extent. With the heat-dissipating fan provided in the center of the annular heat exchanger, the airflow generated by the heat-dissipating fan can blow the heat exchanger in multiple directions, thereby to obtain the optimal effect of heat dissipation.

Abstract: A heat sink assembly (100) includes a heat sink (10) having a plurality of fins (14), a fan handle (24) buckled with the fins and a fan (30) mounted on the heat sink (10) via the fan handle. The fan handle includes a retaining body (26) clasping two adjacent fins having a space therebetween. A screw (22) is extended through the fan and into the space of the two adjacent fins. The retaining body includes a pair of opposite lateral walls (260) clamping opposite sides of the two adjacent fins, for preventing the two adjacent fins from being over expanded outwardly during the insertion of the screw into the space.

Abstract: An improved combustion air charger, such as a turbocharger or a supercharger, includes a housing (10) having a rotary shaft (18) journalled therein. At least one compressor wheel (20,22) is located on the shaft (18). The housing (10) includes an ambient inlet (30) as well as a compressed air outlet (32) and a heat exchanger (36) is located between at least one of the compressor wheels (20) and the outlet (32) and is arranged so that air flow through the heat exchanger (36) is generally in the radially inward direction.

Abstract: A cooling apparatus for heat generating devices such as semiconductor chips comprises a parallel disk fan in the middle of a set of heat sink fins. The parallel disk fan has radial elements placed between the disks to efficiently create air flow without turbulence. Cooling efficiency is further enhanced when heat dissipation through the parallel disks of the fan is introduced.

Abstract: Provided is a high-performance heat exchanger. A porous material is formed on one side of the heat exchanger. The porous material exchanges heat with a coolant pipe and/or a fin. Pores formed in the porous material improve exchanging heat with the air, thereby improving a heat exchanging performance of the heat exchanger.

Abstract: A header construction intended for use in a heat exchanger (36) employed in a relatively high pressure application includes an array of generally parallel tube runs (84) with fins (82) extending between adjacent ones of the tube runs. At least one relatively flat header plate (86) has a plurality of tube slots (88) for receiving ends (90) of the tubes (84) and a tank (94) is mounted to and sealed to the header plate (86). Peripheral flanges (112) are located about tube slots (86) in the headers and a header reinforcing plate (114) is bonded to the header plate (86) oppositely of the tank (94). Stiffening beads in the form of flanges (120) are located on the header reinforcing plate (114) between openings (118) therein through which the tubes (84) pass and extend away from the header plate (86).

Abstract: The present invention is directed to a method of constructing a semiconductor chip cooling device consists of multiple fans and heat sinks to provide redundant cooling capability. Heat coming from a semiconductor chip is first distributed to several heat sinks using multiple heat pipes. The heat sinks are placed around the fan outlet such that air is pulled in near the center of the fan and then pushed to across the heat sinks. Multiple fans and heat sinks are stacked up to form a complete cooling device. An external control circuitry is used to monitor and control the fans. In case of one fan fails, the other fans will be speeded up to make up the lost of air flow.

Abstract: A refrigerator condenser includes a spiraled tube and wire member construction to form a substantially longitudinal and rounded passage between a first end and a second end. The second end of the condenser is closed, thereby preventing longitudinal airflow through the passage and producing airflow into the passage in a substantially perpendicular direction to the condenser surface. Heat transfer to the air is thereby maximized and efficiency of the condenser is increased.

Abstract: A combined flame arrester and intercooler for cooling intake gas for an internal combustion engine is disclosed. The intercooler comprises an elongated body having a longitudinal axis. The elongated body has a central passageway that extends substantially parallel to the longitudinal axis. An inlet opening is located on one end of the elongated body such that the intake gas enters the central passageway though the inlet opening. The intercooler further includes a plurality of cooling tubes forming at least a portion of the elongated body. The plurality of tubes substantially surround the central passageway. Each of the cooling tubes is spaced from an adjacent cooling tube such that an air flow path is formed there between. The intake gas is cooled by flowing past the cooling tubes. Preferably, the intake gas flows along the central passageway in the elongated body and radially outward therefrom through the air flow path between the cooling tubes.

Abstract: An integrated cooling unit configured to effect the removal of heat via a circulating liquid coolant includes a reservoir to contain the liquid coolant, a tubing arrangement disposed at an outer surface of the reservoir, a pump disposed within the reservoir, and a fan configured to provide a flow of air across the tubing arrangement to remove the heat. The tubing arrangement is fluidly communicable with a heat exchanging device, and the pump is configured to circulate the liquid coolant through the tubing arrangement to the heat exchanging device.

Abstract: An electronic device has at least one component that is capable of generating a quantity of heat. The electronic device further has an air-moving device and an air duct. The air moving device is capable of creating a flow of air that removes a portion of the quantity of heat. The flow of air enters the air duct. The air duct has a restriction chamber that includes a venturi vent in which the flow of air into the duct and through the restriction chamber creates a new flow of air into the venturi vent. The new flow of air into the venturi vent does not pass over the at least one component in the electronic device.

Abstract: A heat-exchanger assembly, which can be advantageously employed as an intercooler for an air-charging system for an internal combustion engines includes a plurality of generally wedge-shaped coolant tubes through which coolant is directed for effecting cooling of compressed air flowing about the tubes. In order to promote efficient operation, each of the wedge-shaped cooling tubes includes a plurality of coolant passages of substantially identical hydraulic diameter or cross-sectional area, thereby promoting uniform flow of coolant through each coolant tube. Each coolant tube includes outer walls which may be of a substantially uniform thickness, or which may increase in thickness across the width of the tube.

Abstract: A compact rotary compressor unit within internal intercooling includes a rotary shaft (10) with at least one compressor wheel (14,16) mounted thereon for rotation therewith. The compressor wheel (14,16) has an inlet end (18) of relatively small diameter and a radial discharge end (20) of relatively large diameter. A nominally donut-shaped intercooling heat exchanger (42) is centered about the shaft (10) to receive compressed air from the compressor wheel and cool the same. Both the compressor wheel (14,16) and the heat exchanger (42) are confined in a housing (28).

Abstract: A rotary compressor machine, such as a combustion air charger, includes a rotatable shaft (18) having at least one compressor wheel (20,22) thereon and disposed within a housing (12,14). A donut-shaped heat exchanger (36) is located within the housing (12,14) between the compressor wheel (22) and an outlet (32) from the housing and has radially inner and outer peripheries (40,42). The outer periphery (40) defines an inlet for the heat exchanger (36) for gas discharged by the compressor wheel (20). The heat exchanger is provided with radially inner and outer flow paths defined by tubes (92) and includes a combined manifold and tank (44) which is secured and sealed to a header plate (88) receiving the tubes (92). The combined manifold and tank (44) includes first, second and third axially spaced walls (96,98,100) with each having a central opening (110,112,114).

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: A heat sink for free convection cooling in horizontal applications is provided. Specifically, the heat sink includes a plurality of spaced apart cooling fins, which are supported by an angled base. The cooling fins are transversely attached to the base and extend in a substantially vertical direction. In addition, the cooling fins extend beyond an outer edge of the base so that air can flow horizontally beneath the base and then vertically through the spaced apart cooling fins.

Abstract: The invention relates to a cooler having means for directing a cooling medium, means for directing a medium to be cooled, and an essentially axially symmetrical housing. The means for directing the medium to be cooled is arranged in such a way that the medium to be cooled, in at least one first region, flows in an essentially axial direction, and the medium to be cooled, in at least one second region, flows in a direction having a radial component. The invention also relates to a method of cooling a medium and to various uses of a cooler according to the invention.

Abstract: Optimization of the efficiency of a compact cooling system for air cooling of at least two different heat exchange fluids is obtained in a construction including three heat exchangers (10), (12), (14) arranged in a housing-like shape with an open center. A radial fan (44) is located within the housing and is rotatable about an axis (42). A front panel (36) having an air inlet (38) on the axis (44) abuts a corresponding one of the opposed sides (26), (62) of each of the heat exchangers while a rear panel abuts the other of the opposed sides (64) of each of the heat exchangers (10), (12), (14) and journals the fan (44) for rotation about the axis (44).

Abstract: A heat dissipation device for dissipating heat from an electronic package (80) includes a heat sink (10) and a fan (30). The heat sink includes a base (12) and a plurality of fins (14). The base has a first surface (122) in thermal contact with the electronic package and a pair of sloped heat dissipation surfaces (126). The fins are perpendicularly attached on the heat dissipation surfaces. The fan is supported on the heat sink. During operation of the heat dissipation device, the cooling air is drawn into the heat sink by the fan and exits the heat sink along the heat dissipation surfaces.

Abstract: A heat exchanger including a first header having an inlet therein, a second header, an outlet in one of the first and second headers, and a plurality of flat tubes extending between the first and second headers for carrying a fluid between the first and second headers. A first connector is also provided for connecting a first exterior line to one of the first and second headers, the first connector being proximate and substantially parallel to an end of one of the flat tubes. In a compact cooling system, such heat exchangers may be disposed about a radial fan directing air flow outwardly away from the fan axis. One of a system inlet and a system outlet are connected via the first exterior lines to the first connectors of at least two of the heat exchangers.

Abstract: Improved efficiency is obtained in a rotary machine having a rotary shaft (18) mounting a compressor wheel (20) that discharges into a heat exchanger (36) having a core (82) with a central opening (42) in surrounding relation to the shaft (18). The heat exchanger (36) includes a coolant tank (90) on one side of the core (82) and in fluid communication with the same which serves as one boundary of radially extending space (68) through which a gas is discharged by a compressor wheel (20). A deswirling vane structure (80) causes gas discharged by the compressor wheel (22) to move radially outward within the space (68) and is formed of a material of good thermal conductivity and thermally bridged to the tank (90) to conduct heat thereto to be rejected to coolant in the tank.

Abstract: A heat-exchanger assembly, which can be advantageously employed as an intercooler for an air-charging system for an internal combustion engines includes a plurality of generally wedge-shaped coolant tubes through which coolant is directed for effecting cooling of compressed air flowing about the tubes. In order to promote efficient operation, each of the wedge-shaped cooling tubes includes a plurality of coolant passages of substantially identical hydraulic diameter or cross-sectional area, thereby promoting uniform flow of coolant through each coolant tube. Each coolant tube includes outer walls which may be of a substantially uniform thickness, or which may increase in thickness across the width of the tube.

Abstract: A compact cooling system including a radial fan directing air flow outwardly and a plurality of heat exchangers disposed around the radial fan. Each heat exchanger has a plurality of tubes extending between an inlet header and an outlet header, with the headers extending generally in the same direction as the fan axis. A system inlet is connected to the inlet headers and a system outlet is connected to the outlet headers, whereby the length of the connection between each heat exchanger and the system outlet and system inlet is generally the same for each heat exchanger.

Abstract: A heat exchanger system includes one or more nonmetallic finless heat exchanging tubes. The heat exchanging tubes are coiled around a central axis, and vehicle fluid flowing through the tubes is cooled or heated by airflow perpendicular to the central axis.

Abstract: Disclosed is a spiral heat exchanging device having an improved cooling efficiency in which a plurality of spiral pipes connected to an inlet pipe for introducing a coolant are formed to be spirally wound with a gradually increased diameter toward a blast fan and the coolant is discharged through a discharge pipe so that the wind generated from the blast fan is spread evenly on the spiral pipes.

Abstract: A header construction intended for use in a heat exchanger (36) employed in a relatively high pressure application includes an array of generally parallel tube runs (84) with fins (82) extending between adjacent ones of the tube runs. At least one relatively flat header plate (86) has a plurality of tube slots (88) for receiving ends (90) of the tubes (84) and a tank (94) is mounted to and sealed to the header plate (86). Peripheral flanges (112) are located about tube slots (86) in the headers and a header reinforcing plate (114) is bonded to the header plate (86) oppositely of the tank (94). Stiffening beads in the form of flanges (120) are located on the header reinforcing plate (114) between openings (118) therein through which the tubes (84) pass and extend away from the header plate (86).

Abstract: A CPU cooling structure is constructed to include a heat sink adapted for mounting on a motherboard to absorb heat from a CPU of the motherboard, a fan provided above the heat sink and adapted for causing currents of air toward the heat sink to carry heat away from the heat sink, and a flow guide mounted on the heat sink to hold the fan above the heat sink, the flow guide having two flow guide holes and an air damper suspended in between the flow guide holes and adapted for guiding air from the fan toward the center area of the heat sink for enabling air to flow through air passages in the heat sink in reversed directions to carry heat away from the heat sink.

Abstract: An improved combustion air charger, such as a turbocharger or a supercharger, includes a housing (10) having a rotary shaft (18) journalled therein. At least one compressor wheel (20,22) is located on the shaft (18). The housing (10) includes an ambient inlet (30) as well as a compressed air outlet (32) and a heat exchanger (36) is located between at least one of the compressor wheels (20) and the outlet (32) and is arranged so that air flow through the heat exchanger (36) is generally in the radially inward direction.

Abstract: A compact heat exchanger system including a radial fan directing air flow outwardly away from the fan axis and a plurality of heat exchangers disposed around the radial fan. At least two of the heat exchangers include headers with longitudinal walls extending generally in the same direction as the fan axis with one of the heat exchangers disposed with its outlet header longitudinal wall adjacent the longitudinal wall of the inlet header of a second of the heat exchangers. A flow opening is provided between the adjacent longitudinal walls of the outlet header of the one heat exchanger and the inlet header of the second heat exchanger.

Abstract: A CPU cooling structure is constructed to include a heat sink adapted for mounting on a motherboard to absorb heat from a CPU of the motherboard, a fan provided above the heat sink and adapted for causing currents of air toward the heat sink to carry heat away from the heat sink, and a flow guide mounted on the heat sink to hold the fan above the heat sink, the flow guide having two flow guide holes and an air damper suspended in between the flow guide holes and adapted for guiding air from the fan toward the center area of the heat sink for enabling air to flow through air passages in the heat sink in reversed directions to carry heat away from the heat sink.

Abstract: A liquid cooler (1) includes a body (10) and a cover (20) attached on the body. The body includes a base (12) with a first cavity (126) accommodating liquid, a central hollow cylinder (16) having a passage (164) in communication with the first cavity, and a plurality of vertical tubes (18) in communication with the first cavity. A plurality of fins (162) extends outwardly from the hollow cylinder. The cover defines a second cavity (26) in communication with the passage and the tubes. The liquid within the first cavity is heated by a heat-generating electronic device and moved to the second cavity through the tubes. Heated liquid which has reached the second cavity flows down through the passage along an inner surface of the hollow cylinder and returns back to the first cavity. The heated liquid is cooled by the fins conducting heat away from the hollow cylinder.

Abstract: The present heat dissipation device is provided with a fan frame and a blade structure. The fan frame includes an air inlet, an air outlet, and a curved portion. The air inlet has a non-circular indentation in the vicinity of the curved portion corresponding to the airflow passage. This indentation effectively increases the airflow amount and static pressure of the airflow expelled from the heat dissipation device.

Abstract: A transmission drives a radial fan about a fan axis in a vehicle cooling unit including a plurality of heat exchangers arranged to surround the radial fan to receive a radial air flow therefrom. A driving pulley, a driven pulley, and a idler pulley of the heat exchangers.

Abstract: A compact cooling system includes a mounting panel adapted to receive a plurality of at least three cooling units, a cooling fan, and a fan drive mechanism. The mounting panel supports the fan and drive mechanism in a manner allowing rotation of the fan about the axis of rotation. A front side of the mounting panel is adapted for receiving and supporting the cooling units in a pattern defining a cantilevered, tubular polygonal solid disposed about the fan. The mounting panel includes a convex central region extending into the tubular polygonal solid and receiving the drive mechanism in operative connection to the fan. By virtue of this arrangement, a very compact cooling system is provided. The tubular polygonal shape of the cooling units, when mounted on the mounting panel, forms an air duct for directing a flow of cooling air induced by the fan through the cooling units.

Abstract: An oil cooler for an internal combustion engine includes an oil circuit and a cooling circuit arranged in a housing with inlet opening and outlet openings. The housing has a generally annular, C-shaped structure which forms a central, axial cylindrical bore and a radially extending slot. The housing is attached to an annular plate. The bore may receive engine components, such as shafts and the like.

Abstract: To reduce noise caused by exhausted cooling air as well as to maintain a necessary amount of cooling air of a cooling fan. A cooling fan is positioned behind a radiator. A shroud surrounds an impeller coupled to a motor and a rotating shaft. The shroud has an inlet and an outlet in the shape of a bell mouth. The bell mouth shaped inlet has its front edge spaced from the rear surface of the radiator by a clearance D, and forms a space around its front peripheral edge. A space is formed via the space, and opens around the periphery of the shroud. The ratio A:B is 1:3 to 5, preferably approximately 1:4, where A denotes a difference between maximum and minimum diameters of the bell mouth shaped outlet of the shroud, and B notes a length of the shroud.

Abstract: Heat exchange devices are provided for use in ventilation and air conditioning systems where the heat carriers do not mix with one another. According to one embodiment, a heat exchanger type fan includes a casing having two inlets and two outlets, and a double-sided centrifugal impeller. The casing is divided into two isolated chambers, and the chambers together with the impeller form two isolated centrifugal fans. The impeller is made of a solid dividing disk, with backward curved blades located on both sides of the dividing disk, and intermediate blades placed between the backward curved blades and located over a periphery of the dividing disk. A ratio of a length of the backward curved blades to a distance between the intermediate blades over a mid-radius of the impeller is at least 10.

Abstract: A self-fixturing fan shroud (12) for use with a heat exchanger assembly (13), the heat exchanger assembly (13) includes an upper horizontal surface (16), a lower, upwardly opening, horizontal channel (18), and at least one core (14 or 15) extending between the upper horizontal surface (16) and the channel (18). Each of the cores (14 and 15) has a front face (24), a back face (26), and air flow passages extending from the front face (24) to the back face (26). The fan shroud (12) comprises a covering portion (28) having an opening (30) disposed therethrough. The opening (30) is of a predetermined size sufficient to receive a fan. An upper horizontal flange (38) extends from the covering portion (28) to rest on the upper horizontal surface (16) of the heat exchanger assembly (13) to vertically locate the fan shroud (12) relative to the heat exchanger assembly (13).