A heat exchanger including a sealed housing and a body positioned inside the housing, the body including a stack of least one first assembly of first and second plates pressed against each other, between which flows a first fluid, and at least one second assembly of third and fourth plates pressed against each other, between which flows a second fluid, the first and second assemblies being arranged so that they transfer heat between the first and second fluids. This configuration limits the risk of leaks and mixing of the two fluids.

A baffle for a furnace of a heating, ventilation, and air conditioning (HVAC) system includes a mounting flange configured to be secured to a housing of the furnace. The baffle also includes a first panel extending from the mounting flange into an air flow path extending through the furnace and a second panel extending from the first panel toward the housing.

A heat exchanger including a corrugated heat transfer sheet having a first surface and a second surface on opposite sides thereof, a first flow channel for a first fluid flow in a first flow direction parallel to a longitudinal direction, and a second flow channel for a second fluid flow in a second flow direction parallel to the longitudinal direction, the second flow direction being opposite to the first flow direction. The heat exchanger includes a channel dividing system which provides the first flow channel and the second flow channel on opposite sides of the corrugated heat transfer sheet such that the first fluid flow is adapted to be in contact with the first surface, and the second fluid flow is adapted to be in contact with the second surface.

A system for selectively heating and cooling including a three-way heat exchange apparatus, a source apparatus for selectively heating and cooling a source fluid, a phase change material for selectively storing heating and cooling potential, and a distribution apparatus for selectively distributing heating and cooling a distribution fluid, wherein the three-way heat exchange apparatus is connected to the phase change material by an interface between the heat exchange apparatus and the phase change material.

The present application relates to a stencil device (150) for simultaneous stencil printing of brazing material onto elevations, areas surrounding port openings, and a circumferential skirt (210) of a heat exchanger plate (200) wherein the stencil device (150) comprises an upper stencil having openings for applying brazing material to elevations and areas surrounding port openings of the heat exchanger plate (200) and a lower stencil printing stencil (150) having a large opening (190) for receiving the heat exchanger plate (200) and contacting an outer perimeter of the circumferential skirt (210) of the heat exchanger plate (200), wherein an inner surface (195) of the large opening (190) comprises brazing material exits (160) for applying brazing material to the circumferential skirts (195). Disclosed is also a method of such stencil printing and also the use of a stencil device for applying heat exchanger plates (200) with a brazing material.

A radiator for cooling a transformer, preferably a power transformer, or a choke, includes a plurality of plate-shaped radiator elements which are disposed parallel to one another and through which a coolant can flow in parallel. At least one elastically deformable element is provided at least between two adjacent radiator elements and is constructed in such a way that it counteracts an expansion of the radiator elements perpendicular to the surface of the radiator elements. Plastic deformation of the walls of the radiator elements can be prevented by the elastically deformable elements. A unit including a transformer or a choke and a method for producing a radiator are also provided.

When, out of adjacent two in a stacking direction of heat transfer plates, one heat transfer plate provided in front of the other heat transfer plate is referred to as a first heat transfer plate and the other heat transfer plate provided in rear of the one heat transfer plate is referred to as a second heat transfer plate, a header portion of each of the first heat transfer plates and a corresponding header portion of each of the second heat transfer plates partly form a non-flow path region where the header portions are in contact with each other not to allow fluid to pass through the non-flow path region. A peripheral edge part in the non-flow path region of each of the first heat transfer plates includes a convex portion projecting upward, and a peripheral edge part in the non-flow path region of each of the second heat transfer plates includes a concave portion recessed downward. A space of the convex portion and a space of the concave portion are stacked on each other in the stacking direction to define a cavity, and a communication port through which the cavity communicates with outside is provided at plate portions defining the cavity.

A heat exchanger assembly comprising a frame (10) and a heat exchanger (20), wherein the heat exchanger (20) comprises a core of plates (21) stacked in a first direction, with edges (22) protruding along their outline, characterized in that the frame (10) comprises a retaining element (30) configured to engage plate edges (22) so that the retaining element (30) restricts movement of the heat exchanger (20) with respect to the frame (10) in the first direction, wherein the retaining element (30) comprises an elongated core (31) attached to the frame (10) and plurality of protrusions (32) protruding from this core (31), said protrusions (32) configured to protrude between plate edges (22).

A water heater (WH) comprises: a primary heat exchanger (H1) that recovers heat from heating gas; a secondary heat exchanger (H2); and a heating gas flow regulator (48, 40a) for regulating the flow of heating gas so that heating gas flowing inside a first case (2) of the primary heat exchanger (H1) in an area near at least one side wall part (20) of the first case (2) is prevented from entering designated gaps (C2, C3) in the secondary heat exchanger (H2). Thus, high temperatures in side wall parts (50) of the secondary heat exchanger (H2) can be suitably prevented and heating efficiency can be suitably improved.

A radiator for cooling a transformer, preferably a power transformer, or a choke, includes a plurality of plate-shaped radiator elements which are disposed parallel to one another and through which a coolant can flow in parallel. At least one elastically deformable element is provided at least between two adjacent radiator elements and is constructed in such a way that it counteracts an expansion of the radiator elements perpendicular to the surface of the radiator elements. Plastic deformation of the walls of the radiator elements can be prevented by the elastically deformable elements. A unit including a transformer or a choke and a method for producing a radiator are also provided.