FIELD: heating systemSUBSTANCE: core of the recuperative countercurrent heat exchanger includes a base made of a heat insulating material and a plurality of heat transfer rods or grids passed through the substrate, wherein the base with rods or grids is arranged to be housed in the heat exchanger housing, dividing it into two channels for counter flow of coolant therethroughEFFECT: increasing the efficiency of heat exchange while enhancing technical capabilities and simplifying service2 cl, 5 dwg

Core of the recuperative countercurrent heat exchanger (versions)

PURPOSE: A heat recovery type ventilation system with an external bypass function is provided to reduce a volume of the system, to dramatically enhance serviceability, and to remarkably reduce production costs. CONSTITUTION: A heat recovery type ventilation system with an external bypass function comprises a body(1), a heat exchanger, a control unit, an air supply fan, and an exhaust fan. Bypass duct connection ports are installed respectively in an exhaust outlet and an exhaust inlet formed to be crossed in both sides of the body. The bypass duct connection port is installed to be exposed to outside through a top surface of the body. A bypass duct of a predetermined shape is detachably installed in between the two bypass duct connection ports in the outside of the body. An exhaust flow pass changing member(50) changing a flowing direction of air, which is discharged from indoors to the outside, to the heat exchanger or the bypass duct by corresponding to output signals of a control unit is formed between the exhaust inlet and the bypass duct connection port.

Heat recovering type ventilation apparatus with external by-pass function

FIELD: ventilationSUBSTANCE: supply and exhaust plant with exhaust heat recovery and indirect adiabatic cooling of supply air includes supply and exhaust chambers, plate-type cross-flow recuperator mounted in diagonal, controlled recirculation air valve, the supply chamber includes inlet pipe, controlled and heated inlet air valve, air filter, bypass valve, mixing chamber with controlled air valve at the inlet, air heater unit, ventilation unit and discharge pipe, exhaust chamber includes air filter, ventilation unit, controlled air valve mounted at recuperator inlet, inlet and discharge pipes, supply air cooler Supply chamber features additional inlet pipe with air filter, exhaust chamber features additional controlled air valve, additional inlet pipe with controlled and heated discharge valve and additional inlet pipe positioned between controlled and additional controlled air valves, controlled and heated inlet valve and air filter, recuperator consists of a case with walls, bottom, pan for condensate collection with drain choke and siphon, and four-stage heat exchanger made of plate-type heat exchangers connected in sequence by ridges and placed inside recuperator case in two rows separated by vertical partition connected to side ridges of heat exchangers External ridges of heat exchanger rows are connected tightly to side walls of recuperator case, lower heat exchangers are connected by master link In addition, floor panel of supply and exhaust plant features access hole in intermediate horizontal partition, top half of upper heat exchangers is protruding beyond recuperator case flanges and integrated through the access hole in the floor panel of supply and exhaust plant into supply chamber with tight connection of recuperator case flanges to the floor panel and of loose ends of upper heat exchangers to side walls of supply air chamber, recuperator is integrated by top ridges of upper heat exchangers into the main hole of intermediate horizontal partition, supply and exhaust plant features transverse partition in the main hole of intermediate horizontal partition, mounted on vertical partition of recuperator and connected to top panel of supply and exhaust plant thus forming air ducts connecting upper heat exchangers of recuperator with chambers of supply and exhaust plant, supply air cooler is made in the form of adiabatic damper of exhaust air with feeding water pipeline that are positioned in the exhaust chamber between controlled air valve and recuperator, bypass valve is installed in additional inlet pipe of supply chamber at the inlet before air filter, discharge pipe of exhaust chamber is positioned above inlet pipe of supply chamber, and side walls and bottom of recuperator feature maintenance hatchesEFFECT: improved energy efficiency of plant during cold and warm seasons, extended functional capabilities9 cl, 17 dwg, 3 tbl

Supply and exhaust plant with exhaust heat recovery and indirect adiabatic cooling of supply air

FIELD: heating.SUBSTANCE: in the method to cool two flows of coolant by means of heat exchange with a cooling air via a heat exchange surface in a multiturn cross heat exchanger, both flows are cooled in a single bisectional matrix of a heat exchanger, at the same time the coolant flow having higher inlet temperature is previously cooled in the first section of the matrix, using temperature potential of outgoing cooling air flow. Then, being mixed with the main coolant flow, varying its inlet temperature and increasing temperature discharge, it arrives into the second section of the matrix, where both flows continue to be cooled to the necessary temperature with an incoming air flow at higher temperature discharge.EFFECT: increased efficiency of a heat exchanger and reduced hydraulic resistance of an air tract.8 dwg

Method to cool two flows of coolant

Рекуперативный подогреватель технологического воздуха, содержащий корпус с установленным в нем пучком теплообменных труб, отличающийся тем, что подогреватель содержит распределительную камеру с патрубком для входа воздуха, образованную соосно расположенной с корпусом обечайкой диаметром большим, чем диаметр корпуса, и двумя кольцами, расположенными в верхней и нижней частях камеры и герметично примыкающими к обечайке и корпусу, и участком корпуса, расположенным между кольцами и равномерно по площади перфорированным отверстиями для входа воздуха в межтрубное пространство, при этом распределительная камера разделена на секции поперечными перегородками, перфорированными отверстиями, причем диаметры отверстий увеличиваются по ходу воздуха от перегородки к перегородке.

Core of the recuperative countercurrent heat exchanger (versions)

References

Heat recovering type ventilation apparatus with external by-pass function

Supply and exhaust plant with exhaust heat recovery and indirect adiabatic cooling of supply air

Method to cool two flows of coolant

Рекуперативный подогреватель технологического воздуха