A heat exchange element is a heat exchange element formed by stacking a plurality of heat transfer plates. The heat transfer plate includes: a heat exchanger that allows air passing through one side in a stacking direction of a plurality of the heat transfer plates and air passing through another side in the stacking direction to pass through in directions facing to each other to cause heat exchange; a header provided on one side and another side with the heat exchanger interposed therebetween when viewed along the stacking direction; and a joining edge provided along a side of the heat exchanger not in contact with the header. Joining edges of a plurality of the stacked heat transfer plates are in contact with each other and joined by ultrasonic welding, and the joining edge is formed with a first convex portion that protrudes along the stacking direction.

A heat and humidity exchanger comprises panels made up of membrane sheets attached on either side of a separator. Channels extend across each panel between the separator and the membrane sheets. The panels are much stiffer than the membrane sheets. Panels are stacked in a spaced apart relationship to provide an ERV core. Spacing between adjacent panels may be smaller than a thickness of the panels,

A thermal energy storage assembly characterized by a housing having first and second chambers characterized by first and second phase-change media, respectively, is generally provided. The housing includes first and second housing portions and a partition structure, the housing portions and the partition structure united about their peripheries via an ultrasonic weldment so as to delimit the housing chambers. The second housing chamber includes condenser and evaporator chamber portions or segments. The partition structure and the second housing portion are selectively united via ultrasonic weldment in furtherance of forming tensioning elements within same. A wicking structure and spacing element reside within the second housing chamber to aid phase-change of the second phase change media.

A heat transmitting device is provided, including a main body and an integrating portion. The main body has at least one opening. The integrating portion is used to seal the opening, and has a first surface and a second surface opposite the first surface. A first welding pattern is formed on the first surface, a second welding pattern is formed on the second surface, and the position of the first welding pattern corresponds to that of the second welding pattern. The type of the first welding pattern and the type of the second welding pattern are asymmetric.

Systems and methods for portable air conditioners are shown. In accordance with one aspect of the present invention, a description of a design is provided for a portable air conditioning unit that uses a standard 5-gallon bucket and 20 pounds of ice. In some embodiments, a 24VDC lithium ion battery pack powers a backwards curved impeller, which draws air into an intake plenum and down through draft tubes, up thru an impeller, which slings the air radially thru exhaust duct(s) and out onto the user(s). A single push button may be utilized to turn the fan on and off and select a fan speed. In some embodiments, a neoprene insulating sleeve may be applied to the outside of the 5-gallon bucket or may line the inside of the bucket. In some embodiments, up to 7 vent wedges may be installed to duct the cool air in selectable directions. In some embodiments, the vent wedges may be removed allowing the top to seat down lower increasing the velocity of the cool air exiting radially.

A heat pipe structure includes a first plate, a second plate and a plurality of wick structures. The second plate is connected to the first plate to form a chamber. The wick structures are disposed in the chamber, and the distribution shape of the wick structures is approximately the same as the shape of a portion of the chamber. The chamber is formed by at least one coupling portion and three or more extending portions. The coupling portion communicates with the extending portions, and the contour of the connected first and second plates is different from that of the chamber.

A heat exchanger includes a core and a housing receiving the core. The core includes sets of tubular elements and fluid flow passages. The fluid flow passages sandwich at least one set of tubular elements. The housing includes a first and a second portion and extending ribs and extending from at least one of a first and a second face. In the assembled configuration, the extending ribs and limit fluid flow through gap between the core and the housing. At least one of first and second fins disposed in respective first and second fluid flow passages at extreme ends of the core is deformed to disrupt fluid flow through respective first and second fluid flow passages.