1. Gas hearth with atmospheric burner (16) for the preparation of hot water or for air heating, comprising a combustion chamber (14) containing the burner (16) with at least one heating gas flue (24) placed after it in which the heat exchange takes place between the combustion gases and the medium to be heated, further comprising a combustion gas discharge conduit (34), connected to the heating gas flue (24) by way of a draught diverter (28), and a flue gas damper (36) in the path of the combustion gases before the draught diverter, which damper opens in time connection with the setting in operation of the burner (16) and closes in time connection with the setting out of operation of the burner (16), and leaves a free residual cross-section open even in the closed condition, characterised in that the flue gas damper (36) is a flue gas damper controlled by a bimetallic element, known per se, and in that the flue gas damper (36) is brought so close to the place of flame generation, and its free residual cross-section is dimensioned so large, that correct combustion is guaranteed even in the initial phase after setting of the burner (16) in operation.

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).

The invention relates to a cooling device ( 1 ) for cooling an item to be cooled, especially for use in the examination, handling and processing of cryogenic samples. The device includes a cooling compartment ( 3 ) for receiving the item to be cooled, an inner wall defining the cooling compartment ( 3 ), an outer wall, a space between the outer wall and the inner wall, and a coolant feed line ( 11 ) for feeding a coolant. According to the invention, the coolant feed line ( 11 ) leads into the space between the inner wall and the outer wall and feeds the coolant into the space, the inner wall being permeable for the coolant.

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 method and device for feeding industrial combustion plants with wastes, in particular with secondary fuels, and to the thus produced fuel, in order to better use, in particular a secondary fuel and to obtain a low-cost usable product which can be introduced into a combustion chamber in an improved manner, especially in order to reliably avoid obstructions in ducts leading to a boiler. The inventive method consists in crushing wastes in a crushing unit, extracting crushed wastes from said crushing unit practically just prior to the introduction thereof into the boiler by means of a conveyer which is arranged in an extracting device, on a pneumatic conveyer and in transporting said wastes to the combustion chamber by means of the pneumatic conveyer.

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.

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 device (10) has at least one resistance heating element and a heat conducting flat envelope (20) enclosing the resistance heating element for outputting heat to the medium to be heated. At least one temperature detection element with electrical connections is arranged inside the envelope with its connections in a connection region (20c) of the envelope. The envelope edges are joined in a sealed manner.