A heat exchanger of a ventilating system includes: heat exchange plates having first air passage through which indoor air being discharged to outside of a building passes and a second air passage through which outdoor air being introduced to the interior of the building passes which are sequentially formed: first corrugation plates attached to the first air passage; and second corrugation plates attached to the second air passage, wherein the heat exchange plates are made of a paper material with numerous fine holes that are able to generate a capillary phenomenon and loess which radiates far infrared ray. Heat exchange and moisture exchange between the indoor air and the outdoor air are performed simultaneously, and a cleaning function of removing a harmful material contained in outdoor air can be carried out.

An electrical heating element comprising a resistive element consisting of granular boron carbide packed in a quartz tube embedded in a piece of copper. A first power lead is electrically connected to the boron carbide at one end of the quartz tube. This first power lead passes through and is electrically insulated from the piece of copper. The second power lead is electrically connected to the boron carbide at the other end of the quartz tube, either directly or via the piece of copper. In use, connection of the first and second leads to an electrical power source causes the resistive element to generate heat in a very fast manner and to trandmit this heat to the piece of copper.

A device for heating or cooling multiple single chamber containers or a multi-chamber container. The device includes: a unitary heat or cold source providing a source of heat or cold; heat exchange elements in thermal communication with the heat or cold source and extending away from the heat or cold source; a thermal barrier between each of said heat exchange elements to thermally isolate the heat exchange elements from each other. Each heat exchange element is thermally associated with one or more chambers that are different from one or more chambers associated with other heat exchange elements to thermally isolate the chambers from each other. Preferably the container is a sample or reagent container used in a clinical analyzer, such as a multi-chamber reaction cuvette or a multi-chamber microtiter plate. An incubator assembly, preferably usable in a clinical analyzer, can include the device for heating or cooling.

The invention relates to a cooling system, with a cooler (1) taking up heat, for a permanently-energized synchronous motor, in particular, a motor for a locomotive. A first line (2) leads from the output of the cooler (1) to the input of a recirculation cooler (4), emitting heat to the environment. A second line (5) leads from the output of the recirculation cooler (4) to the input of the cooler (1). A first non-return valve (3), permitting flow towards the recirculation cooler (4), is arranged in the first line (2) and a second non-return valve (7), permitting flow towards the cooler (1), is arranged in the second line (5).

The invention relates to a heat accumulator having at least one first volume and one second volume. Said volumes are separate, can be respectively filled with, or passed through, by a medium, and are in, or can be brought into, thermal contact. The invention is characterised in that another volume that can be filled with a fluid and emptied, a so-called switchable volume, is provided between at least the first and second volumes, said switchable volume being in thermal contact with the media of the first and second volumes.

The invention relates to a composition for producing a heat-insulating coating comprising at least one radiation-absorbing compound and at least one IR-reflector component, to a heat-insulating coating comprising this oriented, cured composition, and to a process for producing said coating.

The heating system (1), especially for a motor vehicle, has at least one heating element, especially a PTC element (2), which is part of a heating train (8) formed by a sub-assembly, whereby several sub-assemblies installed side by side are part of the heating system. A flow resistance element is installed next to one sub-assembly or between two, and is in the form of a grill element (14) fitted in a frame. The flow resistance element may be a plastic or metal component.

1. A contruction element for heat insulation in buildings, especially in protruding cantilever wall portions, comprising an elongate insulation element (10) made of a thermally insulating material, wherein elongate metallic reinforcing elements (20) are provided which extend substantially transversely for the insulation element (10) and which protrude in lateral direction on either side, characterized in that the insulation element (10), together with said reinforcing elements (20), is formed as an integral prefabricated element and provided, or adapted to be provided, with at least one compression element (30) being integrated into the insulation element (10) as an interconnecting (joining) core member and having dimensions corresponding to those of the insulation element (10).