A heatsink is used with a fluid flow generator that rotates about a central axis extending vertically. The heatsink includes a main body section having a top surface facing the fluid flow generator in a vertical direction, and fins that extend upward from the top surface so as to define a plurality of flow passages. The plurality of flow passages form a plurality of fluid paths, each of which has an inlet for the fluid discharged from the fluid flow generator to flow in, and an outlet for discharging to outside the fluid that has entered through the inlet. At least one of the plurality of fluid paths has a first branch section for branching from a first fluid path on downstream of the inlet, and a first joining section for joining a second fluid path having another inlet, on downstream of the first branch section.

A cooling system for electrical and optical devices includes an electrocaloric cooler (EEC). A fluid circuit is in thermal communication with the EEC to dump heat from a working fluid of the fluid circuit into the EEC. The system can include a second EEC, a second fluid circuit in thermal communication with the second EEC to dump heat from a working fluid of the second fluid circuit into the EEC, and a second heat sink in thermal communication with the second fluid circuit to dump heat into the working fluid of the second fluid circuit. The second EEC, second fluid circuit, and second heat sink can be cascaded with the first EEC, first heat sink, and first fluid circuit wherein the second heat sink is in thermal communication with the first EEC to accept heat therefrom.

A fluidic device is disclosed, comprising an enclosed passage that is adapted to convey a circulating fluid. The enclosed passage comprises a flow unit having a first electrode and a second electrode offset from the first electrode in a downstream direction of a flow of the circulating fluid. The first electrode is formed as a grid structure and arranged to allow the circulating fluid to flow through the first electrode. The fluidic device may be used for controlling or regulating the flow of the fluid circulating in the enclosed passage, and thereby act as a valve opening, reducing or even closing the passage.

A guidance unit comprises a first pipe part and a second pipe part, an inner space diameter of the second pipe part is smaller than an inner space diameter of the first pipe part, causing a cross-sectional area of a second flow space perpendicular to a pipe axis of the second pipe part smaller than that of a first flow space perpendicular to a pipe axis of the first pipe part; one end of the pipe axis of the second pipe part and one end of the pipe axis of the first pipe part are connected in series with each other and spaced apart from each other by a first angle, so that the second flow space communicates with the first flow space; thereby, a pressure of an external fluid in the second flow space is greater than a pressure of the external fluid in the first flow space.

A water cooling radiator includes a water pump assembly and a water drain assembly. The water pump assembly includes a base and a housing spliced with the base to form an accommodating cavity. A water inlet portion and a water outlet portion in the accommodating cavity are formed on the base. The water inlet portion includes a water inlet tank provided on the base, a water inlet pump arranged in the water inlet tank and connected with the base, and a water inlet nozzle connected to the base and communicated with the water inlet tank, The water inlet tank is communicated with the water drain assembly. The water outlet portion includes a water outlet tank provided on the base, a water outlet pump arranged in the water outlet tank and connected with the base, and a water outlet nozzle connected to the base and communicated with the water outlet tank.

A heat exchanger has flow channels for coolants, which flow channels include turbulence elements having a different flow resistance depending on a direction of a flow, wherein the flow can be passed through the heat exchanger in different directions. As part of a method of operating the heat exchanger, the heat exchanger is flowed through in different directions using a pump that can be operated in different directions.

The present invention relates to an improved thermal management system for a heat source, such as a high-powered electronic device. Thermal management systems work to maintain the optimal operational temperature of a device to maximise reliability, operational lifespan and/or efficiency, for example by using a fluid coolant to transfer thermal energy from the device to a heat exchanger. The present invention seeks to provide an improved thermal management system by incorporating a phase change material into a heat exchanger.

Disclosed is a heat pipe arrangement method for a heat dissipation and transfer device. The heat dissipation and transfer device includes a metal base, a heat dissipation fin, a heat dissipation fan and a plurality of heat pipes. Each heat pipe includes a heat absorption end and a heat dissipation end. The heat dissipation ends of the plurality of heat pipes are provided in the heat dissipation fin in a penetrating manner. The heat dissipation fan is provided on the heat dissipation fin. Tops of the heat absorption ends of the plurality of heat pipes are tightly mounted on a mounting surface of the metal base. The heat pipe arrangement method includes: arranging the heat absorption ends of the plurality of heat pipes in parallel to each other, center distances between the heat absorption ends of the plurality of heat pipes being different.

A cooling device with a heat exchanger through which air flows and at least one fan arranged on the heat exchanger, forming a radial gap for generating airflow through the heat exchanger. The heat exchanger having a front face through which air flows which points toward the fan and is covered in portions by the fan, so that the front face is divided into a first subface that is at least partially covered by the fan and a second subface that is free of the fan. The cooling device has a guide sleeve arranged between the heat exchanger and the fan so as to close the radial gap at least in portions, forms a flow channel leading from an air outlet of the fan to the first subface of the front face, fluidically connects the air outlet to the first subface, and fluidically separates the same from the second subface.

A coolant circuit for a drive device. It includes a first coolant sub-circuit and a second coolant sub-circuit, in each of which a device to be temperature-controlled is arranged and which are fluidically connected to one another via at least one connecting valve, wherein at least one coolant pump is provided in each of the two coolant sub-circuits, which is designed in at least one of the coolant sub-circuits as a fluid pump having variable delivery direction. The disclosure furthermore relates to a method for operating a coolant circuit for a drive device.