According to some embodiments, there is provided a welding device for welding outer peripheral edges of two irregular shaped plates which are overlapped, including: a rotary table to which the two irregular shaped plates in an overlapped state are fixed; a torch unit, including a welding torch positioned to face the outer peripheral edges of the two irregular shaped plates fixed to the rotary table; a first torch actuator, capable of changing an orientation and a distance of the welding torch relative to the outer peripheral edges; and a first controller, configured to control the first torch actuator, so that the orientation of the welding torch relative to a tangential line of the outer peripheral edges and the distance of the welding torch from the outer peripheral edges are kept constant along a circumferential direction of the outer peripheral edges, during rotation of the two irregular shaped plates.

A plate-type heat exchanger includes a plurality of heat transfer plates stacked on top of each other, a flow passage, formed by each space between the plurality of heat transfer plates, through which a fluid flows in a first direction; an inner fin disposed in the flow passage, a first projecting portion provided on an inflow side of each of the heat transfer plates and configured to prevent the fluid from flowing into gaps between both ends of the inner fin in a second direction and both ends of the heat transfer plate in the second direction, and a second projecting portion formed on an outflow side of each of the heat transfer plates and configured to perform positioning in placing the inner fin into the heat transfer plate. The first direction is a direction of flow of the fluid through the flow passage.

A heat exchanger plate (2) is described comprising an edge (7), a groove (8) running along the edge (7), a gasket arranged in the groove (8), and a corrugated area (10) having tops (12) and valleys (11) between the groove (8) and the edge (7), wherein tops (12) run substantially perpendicular to the edge (7). In such a heat exchanger plate the gasket should be reliably fixed without affecting the stability of the heat exchanger. To this end, in at least one valley (11) a raised section (14) extends from a bottom area (13) of the valley (11) and the gasket comprises a click-on extension arranged in the valley (11) and having a recess adapted to the raised section (14).

A heat exchanger plate (2) is described comprising an edge (7), a groove (8) running along the edge (7), a gasket arranged in the groove (8), and a corrugated area (10) having tops (12) and valleys (11) between the groove (8) and the edge (7), wherein tops (12) run substantially perpendicular to the edge (7). In such a heat exchanger plate the gasket should be reliably fixed without affecting the stability of the heat exchanger. To this end, in at least one valley (11) a raised section (14) extends from a bottom area (13) of the valley (11) and the gasket comprises a click-on extension arranged in the valley (11) and having a recess adapted to the raised section (14).

A plate heat exchanger gasket includes an elongate body and a first number of elongate projections projecting from an upper side of the body and extending along the gasket's longitudinal extension. Each projection is defined by a top and two opposing flanks extending from the top. Referring to a cross section perpendicular to the gasket longitudinal extension, for each of a second number of unsymmetrical projections of the projections, a first area defined by an outer flank of the flanks, the body upper side and a normal of the body upper side extending through the top of the unsymmetrical projection, is smaller than a second area defined by an inner flank of the flanks, the body upper side and the normal of the body upper side extending through the top of the unsymmetrical projection. This normal is displaced from a center normal of the body upper side.

A plate heat exchanger gasket includes an elongate body and a first number of elongate projections projecting from an upper side of the body and extending along the gasket's longitudinal extension. Each projection is defined by a top and two opposing flanks extending from the top. Referring to a cross section perpendicular to the gasket longitudinal extension, for each of a second number of unsymmetrical projections of the projections, a first area defined by an outer flank of the flanks, the body upper side and a normal of the body upper side extending through the top of the unsymmetrical projection, is smaller than a second area defined by an inner flank of the flanks, the body upper side and the normal of the body upper side extending through the top of the unsymmetrical projection. This normal is displaced from a center normal of the body upper side.

A heat-exchange device includes a flow enclosure defined by two external plates, a first inlet and a first outlet for a first heat-transfer fluid, a second inlet and a second outlet for a second heat-transfer fluid, and an exchanger block with plates disposed in the flow enclosure so as to be in fluid communication with the inlets and outlets in order to permit the flow of the first fluid and of the second fluid into and through this exchanger block and the transfer of calories therebetween. Each external plate has at least one hollow. An air-conditioning system may include such device and an aircraft, in turn, can include such air-conditioning system.

A method for manufacturing a heat dissipation device that includes stamping a composite plate including a welding material to form a first plate having a plurality of angled grooves, depositing powder in the plurality of angled grooves of the first plate, contacting the first plate to a second plate, and welding the first plate and the second plate together, and sintering powder to obtain a capillary structure.

A heat treatment device includes first heat transfer bodies including first flow channels, second heat transfer bodies including second flow channels and each being stacked on the respective first heat transfer bodies, and a casing having a space communicating with the second flow channels and being in contact with each surface including the edge of the connection interface between each first heat transfer body and each second heat transfer body. The first heat transfer bodies each include a third flow channel provided in a wall portion isolating the first flow channels from the space of the casing. The first flow channels are grooves in contact with the connection interface, and the third flow channel is a groove in contact with the connection interface and intersecting with a virtual line connecting the first flow channels with the space of the casing at the connection interface.

A heat treatment device includes first heat transfer bodies including first flow channels, second heat transfer bodies including second flow channels and each being stacked on the respective first heat transfer bodies, and a casing having a space communicating with the second flow channels and being in contact with each surface including the edge of the connection interface between each first heat transfer body and each second heat transfer body. The first heat transfer bodies each include a third flow channel provided in a wall portion isolating the first flow channels from the space of the casing. The first flow channels are grooves in contact with the connection interface, and the third flow channel is a groove in contact with the connection interface and intersecting with a virtual line connecting the first flow channels with the space of the casing at the connection interface.