A wafer placement table includes an upper substrate including a ceramic substrate and having a wafer placement surface, a lower substrate disposed on a lower surface of the upper substrate including a refrigerant flow path or a refrigerant flow-path groove, a through hole extending through the lower substrate in an up-down direction to intersect with the refrigerant flow path or the refrigerant flow-path groove, a screw hole provided in the lower surface of the upper substrate, at a position facing the through hole, a screw member inserted from a lower surface of the lower substrate into the through hole and screwed into the screw hole, and a refrigerant-leakage prevention member that prevents the refrigerant from leaking out to the lower surface of the lower substrate through the through hole into which the screw member is inserted.

A heat exchanger assembly including an elongated tubular heat exchanger enclosure defining an interior chamber. A tube sheet is positioned within the interior chamber of the heat exchanger enclosure separating the interior chamber into a shell side and a channel side. The interior portion is configured to removably receive a tube bundle positioned within the shell side of the interior chamber. An annular sleeve member is positioned within the channel side of the interior chamber of the heat exchanger enclosure. An annular elastic torsion member is positioned within the channel side of the interior chamber of the heat exchanger such that the sleeve member is positioned between the tube sheet and the elastic torsion member. The elastic torsion member has an inner circumference deflectable relative to its outer circumference for torsioning the elastic torsion member.

A power module apparatus includes a power module having a package configured to seal a perimeter of a semiconductor device, and a heat radiator bonded to one surface of the package; a cooling device having a coolant passage through which coolant water flows, in which the heat radiator is attached to an opening provided on a way of the coolant passage, wherein the heat radiator of the power module is attached to the opening of the cooling device so that a height (ha) and a height (hb) are substantially identical to each other. The power module in which the heat radiator is attached to the opening formed at the upper surface portion of the cooling device can also be efficiently cooled, and thereby it becomes possible to reduce degradation due to overheating.

A liquid to refrigerant heat exchanger includes a coolant volume that is at least partially defined by a plastic housing and by a metal closure plate. The plastic housing is sealingly joined to the closure plate along an outer periphery of the closure plate. The metal closure plate can be part of a brazed assembly that defines a continuous refrigerant flow path through the heat exchanger between a refrigerant inlet port and a refrigerant outlet port.

A heat exchanger includes a body that includes an at least two opposing surfaces and the at least two opposing surfaces are a trapezoidal. The body of the heat exchanger also includes, an area of cross sectional flow channels through the body. The area of cross-sectional flow channels in a direction perpendicular to the bases of the trapezoid increase or decrease between the two bases.

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 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.

A tube bundle-type heat exchanger, to a tube base, and to a method for sealing same. Aspects of the invention relate to a tube base for a tube bundle-type heat exchanger. In particular, the tube base includes a stack of multiple tube base plates with at least one through-opening for receiving a respective tube of the tube bundle-type heat exchanger. The throughopening is sealed by at least one seal ring. Additional aspects relate to a tube bundle-type heat exchanger comprising such a tube base and to a method for sealing a tube bundle-type heat exchanger in particular in the region of the tube base.

The invention relates to a sealing device (3) for a motor vehicle heat ex-changer (4) consisting of a plate (5) comprising a central cavity (12) configured to allow the passage of a tube of the heat exchanger, characterised in that at least two opposite end edges of said plate (5) are each provided with snap-fastening means (8), each capable of engaging with complementary snap-fastening elements integrated into a recess located in a support frame of the heat exchanger, and characterised in that the sealing device (3) comprises an elastically deformable sealing means (14) arranged around the central cavity (12) formed in the plate (5).

A seal including a first portion having a first width that extends in a radial direction of the seal, a second portion that is joined with the first portion and having a second width that is smaller than the first width, and a first recess that is located in the first portion to reduce a width expansion of the first portion when the seal is compressed in an axial direction of the seal.