A hand-held power tool, and in particular pruning shears, having an electric motor, a cutting member, and a transmission linking the electric motor to the cutting member, the motor and the transmission being housed in a main housing. An intermediate housing, made from a heat conductive material, is housed inside the main housing, the intermediate housing being in thermal contact with the electric motor. At least one heat sink is linked to the intermediate housing, and projects out of the main housing.

There is provided a thermal energy storage system suitable for use with systems adapted to transfer heat from at least one heat source to at least one heat sink (heat transfer system), comprising at least one thermal energy storage unit. There is additionally provided a thermal energy storage system for use with a heat pump, or vapour compression refrigeration systems, a method of defrosting evaporators without affecting the energy delivered in the condenser before the defrosting cycle, and system architecture for defrosting evaporators in heat pumps or in vapour compression refrigeration systems.

A multi-thermal characteristic heat sink fin, comprising a first heat spreading plate, a second heat spreading plate, and a primary heat spreading plate is provided. A plurality of multi-thermal characteristic heat sink fins is assembled together to form a heat sink, further having at least a heat pipe assembled therethrough, and a base plate, assembled to the at least a heat pipe and in contact with a heat source. The primary heat spreading plate is sandwiched and enclosed within the first and second heat spreading plates, hindering debris, contaminants, and moisture from entering the surface interfaces therebetween. The material of the heat pipes and primary heat spreading plate is different from that of the first and second heat spreading plates. No heat treatment process of two or more different materials is required for assembly of the multi-thermal characteristic heat sink fin and at least a heat pipe assembled thereto.

A heat dissipation device is provided herein. The heat dissipation device includes an evaporator chamber at least partially filled with a working fluid to be evaporated when being heated by a heat source; at least one condenser chamber for receiving evaporated working fluid and for condensing the evaporated working fluid, wherein the condenser chamber is interconnected with the evaporator chamber in a fluid conductive manner; and at least one air fin element interconnected between the condenser chamber and one of a further condenser chamber and a side wall of the heat dissipation device; wherein the air fin element has a triply periodic surface providing air fins.

A method includes providing a first metal sheet and a second metal sheet, printing patterns of a plurality of obstructers, a plurality of channels, an evaporator channel, a condenser channel, and a connecting channel on the first metal sheet, bonding the first metal sheet and the second metal sheet to each other, separating the first metal sheet and the second metal sheet from each other to form the plurality of channels, the evaporator channel, the condenser channel, and the connecting channel by introducing a fluid between the first metal sheet and the second metal sheet, introducing working fluid in the plurality of channels, and sealing the first metal sheet and the second metal sheet.

A thermal energy storage and power generation system includes a thermal energy storage device including a container, a heating element in the container, a pair of fins in the container and arranged on opposite sides of the heating element, a thermal storage material in the container, and a tube in the container and extending around the thermal storage material. The system also includes a generator in communication with the thermal energy storage device for converting thermal energy into electrical energy as well as subsystems for regulating and controlling the system.

An inclined heat exchanger for use in a motor vehicle. The heat exchanger contains at least two flat tubes and at least two corrugated fins. The flat tubes and the corrugated fins are stacked alternately one above the other in a height direction (HR) to form a stack. The corrugated fins include a rhombic cross-section. A corrugated fin is also provided for use in the heat exchanger, as well as a method for manufacturing the corrugated fin.

A heat transfer system (e.g., a heat pump) can include at least a first fin array and at least a first pump disposed in fluid communication with the first fin array and configured to cause a first fluid to flow through the first fin array. The system can include at least a first heat transfer layer attached to and/or in thermal communication with the first fin array. The first heat transfer layer can define a second fluid flow path therein for a second fluid to flow fluidly isolated from the first fluid. The first heat transfer layer and the first fin array can be configured to cause heat transfer between the first fluid and the second fluid.

Provided herein is an example heat sink including a heat dissipation unit including a plurality of heat dissipation fin groups including a plurality of heat dissipation fins, the plurality of heat dissipation fin groups forming a laminated structure and a plurality of heat pipes, one end portions of which are thermally connected to a heating element and other end portions of which are inserted into a space provided between the plurality of heat dissipation fin groups forming the laminated structure and thermally connected to the heat dissipation unit.

A heat dissipation device includes a base plate and a plurality of fins arranged on the base plate. Each fin includes a fin body including a first metal sheet and a second metal sheet coupled to each other, wherein the fin body is curved and includes a first portion and a second portion transverse to the first portion, an evaporation channel defined in the first portion, one or more connecting channels disposed in the first portion and in fluid communication with the evaporation channel, a condensation channel defined in the second portion, and one or more auxiliary channels disposed in the second portion and in fluid communication with the one or more connecting channels and the condensation channel.