Abstract:
A heat exchanger, in particular for a heating or air-conditioning system in a motor vehicle, having an evaporator unit to which a refrigerant medium can be supplied via a distribution unit and through which said refrigerant medium flows and around which said refrigerant medium flows after only one diversion (two-block design) at the bottom in a diversion unit, wherein the distribution unit is designed to effect a uniform distribution of the refrigerant medium over the full width of the evaporator.
Abstract:
The evaporator is comprised of: a cold chamber (4), inside of which a pre-evaporating of the supplied fluid (9) is reliably prevented by cooling (16); an evaporating area (5), which is located downstream (15) therefrom and which is formed by the annular gap (3) between an inner tube (1) and an outer tube (2) concentrically surrounding the former, the inner and/or outer tube (13) being heated electrically (13) or reactively by a heat-transfer fluid (11), and; an adjoining vapor chamber (6) for damping possible pulsatile pressures. Evaporation channels are incorporated, e.g. in the form of helical grooves in the outside surface of the inner tube (1) or in the inside surface of the outer tube (2). These evaporation channels can be accessed and cleaned when the inner tube and the outer tube are separated. A periodic or continuous self-cleaning is also possible, e.g. by turning or sliding the inner tube relative to the outer tube. Liquid is prevented from being expelled from the evaporation channels by the formation of the flow guide in the annular gap (3). A device that, to a large extent, is structurally identical to the evaporator also enables the controlled mixing, evaporation and/or reaction of a number of flows of fluid.
Abstract:
A method for fitting pipes onto a wall, especially pipes with attached meters (2), e.g. water meters, has two flat plates (3,4) with moulded pipe grips (5). The plates are clamped together to hold the pipes and are fastened to the wall on spacers. The fitting positions the pipes, and meters, accurately and allows the application of wall rendering. The plates are provided with a selection of fastening holes for the fitting.