Abstract: A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one flow inlet. The impeller assembled in the housing and rotating about an axial direction includes a hub and a plurality blades disposed around the hub. The flow inlet is located in the axial direction and faces the hub. Each of the blades has a wing tab next to the flow inlet, and the wing tab extends from a main surface of the blade to another blade. The wing tab has an inclined surface facing toward a periphery of the flow inlet along a radial direction of the impeller.

Abstract: A portable electronic device including a first body, a second body, a heat source, a first heat pipe, a second heat pipe, and a heat conducting element is provided. The second body is pivotally connected to the first body. The heat source is disposed in the first body and thermally coupled to the heat source. The second heat pipe is disposed in the first body and thermally coupled to the first heat pipe. The heat conducting element is connected to and thermally coupled to the second body, and the heat conducting element slidably contacts the second heat pipe and is thermally coupled to the second heat pipe.

Abstract: Provided is a heat dissipation structure, including a conductive member disposed on and thermally coupled to a heat source, a heat pipe including evaporating and condensing parts, a fan disposed in correspondence to the condensing part, and a heat storage component disposed on a circuit board. The evaporating part is disposed on and thermally coupled to the conductive member. The heat source is located between the conductive member and the circuit board. The conductive member is located between the heat pipe and the heat source. The circuit board is located between the heat source and the heat storage component, and is thermally coupled to the heat source. The heat storage component is thermally coupled to the circuit board and is filled with a working medium absorbing heat conducted from the heat source to the circuit board by latent heat of absorption during phase change. An electronic device is also provided.

Abstract: A multi-loop cycling heat dissipation module including a first tank, a first pipe, a second tank, and a second pipe is provided. The first pipe is connected to the first tank to form a first loop, a first working fluid fills the first loop to transfer heat via phase transformation, and a first high-temperature section and a first low-temperature section are formed on the first pipe. The second pipe is connected to the second tank to form a second loop, a second working fluid fills the second loop to transfer heat via phase transformation, and a second high-temperature section and a second low-temperature section are formed on the second pipe. The first high-temperature section is in thermal contact with the second low-temperature section, and the first low-temperature section is in thermal contact with the second high-temperature section.

Abstract: A heat dissipation fan including a housing, a hub, and a plurality of blades is provided. The hub is rotatably disposed in the housing. The blades are disposed at a surrounding edge of the hub to be rotated with the hub. When the heat dissipation fan is operated, at least one flow path is formed by two adjacent blades, and the flow path has a reduction section away from the hub.

Abstract: A fan adapted for being disposed in an electronic device is provided. The fan includes a hub and a plurality of metal blades respectively extending from the hub. Each of the metal blades has a root portion connected to the hub and an end portion away from the hub, and a mass of the end portion is greater than a mass of the root portion, such that the metal blade is elongated while the fan is rotated.

Abstract: A heat dissipation system of a portable electronic device is provided. The heat dissipation system includes a body and at least one fan. A heat source of the portable electronic device is disposed in the body. The fan is a centrifugal fan disposed in the body. The fan has at least one flow inlet, at least one flow outlet, and at least one spacing portion. The flow outlet faces toward the heat source, and the spacing portion surrounds the flow inlet and abuts against the body, so as to isolate the flow inlet and the heat source in two spaces independent of each other in the body.

Abstract: A heat dissipation system of portable electronic device includes a body, at least one fan and at least one spacing member. At least one heat source of the portable electronic device is arranged in the body. The fan is a centrifugal fan disposed in the body. The fan has at least one flow inlet located in the axial direction and at least one flow outlet located in the radial direction. The spacing member is disposed on at least one of the body or the fan to form a stratified air flow in the body along the axial direction. The stratified air flows into the fan through the flow inlet and out of the fan through the flow outlet respectively.

Abstract: A heat dissipation device includes a heat dissipation member and a fan. The heat dissipation member includes a first heat dissipation fin group and a second heat dissipation fin group stacked on the first heat dissipation fin group. The first heat dissipation fin group includes a plurality of first heat dissipation fins, and the second heat dissipation fin group includes a plurality of second heat dissipation fins. The fan is stacked on the second heat dissipation fin group. The fan is configured to rotate around an axis. The first heat dissipation fins and the second heat dissipation fins are arranged around the axis.

Abstract: An axial flow fan includes a hub and a plurality of fan sets disposed around the hub. The hub rotates around a center axis and has a positive pressure side and a negative pressure side opposite to each other. Each of the fan sets includes at least two blades, and each blade has a wind inlet end, a wind outlet end opposite to the wind inlet end, a negative pressure surface, and a positive pressure surface opposite to the negative pressure surface. The wind outlet end of one of the adjacent two blades corresponds to the wind inlet end of the other one of the adjacent two blades. A gap is provided between the negative pressure surface of one of the adjacent two blades and the positive pressure surface of the other one of the adjacent two blades.

Abstract: A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one flow inlet. The impeller assembled in the housing and rotating about an axial direction includes a hub and a plurality blades disposed around the hub. The flow inlet is located in the axial direction and faces the hub. Each of the blades has a wing tab next to the flow inlet, and the wing tab extends from a main surface of the blade to another blade. The wing tab has an inclined surface facing toward a periphery of the flow inlet along a radial direction of the impeller.

Abstract: A centrifugal heat dissipation fan including a housing and an impeller disposed in the housing on an axis is provided. The housing has at least one inlet on the axis and has a plurality of outlets in different radial directions. A heat dissipation system of an electronic device is also provided.

Abstract: A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one inlet disposed along an axis and at least one first outlet and a second outlet located in different radial directions, wherein the first outlet and the second outlet are opposite to and separated from each other. The impeller is disposed in the housing along the axis. A heat dissipation system of an electronic device is also provided.

Abstract: A heat dissipation fan including a housing, a hub, and a plurality of blades is provided. The hub is rotatably disposed in the housing. The blades are disposed at a surrounding edge of the hub to be rotated with the hub. When the heat dissipation fan is operated, at least one flow path is formed by two adjacent blades, and the flow path has a reduction section away from the hub.

Abstract: An axial flow fan includes a hub and a plurality of fan sets disposed around the hub. The hub rotates around a center axis and has a positive pressure side and a negative pressure side opposite to each other. Each of the fan sets includes at least two blades, and each blade has a wind inlet end, a wind outlet end opposite to the wind inlet end, a negative pressure surface, and a positive pressure surface opposite to the negative pressure surface. The wind outlet end of one of the adjacent two blades corresponds to the wind inlet end of the other one of the adjacent two blades. A gap is provided between the negative pressure surface of one of the adjacent two blades and the positive pressure surface of the other one of the adjacent two blades.

Abstract: A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one inlet and at least one outlet. The impeller is disposed in the housing and rotates about an axis. The inlet is located in an axial direction of the axis and corresponds to the impeller. The outlet is located in a radial direction relative to the axis. The inlet is divided into a compression section and a release section in the rotation direction of the impeller, and the compression section has a uniform first radial dimension relative to the axis. The release section has an extended second radial dimension relative to the axis, and the second radial dimension is greater than the first radial dimension.

Abstract: The present invention relates to a novel method of synthesizing bepotastine or its benzenesulfonic acid salt and novel intermediates used therein. The present invention uses L-?-hydroxy acid for chiral resolution to form an L-?-hydroxy acid salt of a compound represented by the following formula (VII-1), so as to synthesize bepotastine or its benzenesulfonic acid salt in high optical purity.

Abstract: The present invention provides a method for producing a compound of formula (I), which is used for preparing anti-Parkinson's disease drugs, rasagiline and rasagiline mesylate.