Heat recovery device in supply and exhaust ventilation systems of buildings and structures

摘要

The utility model relates to air conditioning and ventilation devices and can be used as an element of energy-saving supply and exhaust ventilation of various buildings and structures, designed to recover heat (cold) of exhaust air. The device consists of a heat-insulated housing (1) made in the form of a rectangular parallelepiped with two inlet and two outlet openings (2). In the housing are installed: a plate heat exchanger (3) made of plates (20) having the shape of an elongated hexagon with a ratio of length to width from 2.5 × 1 to 3.5 × 1, with each plate of the heat exchanger alternating on its surface in a checkerboard pattern the convexity and hollows in the form of a truncated cone, and along the perimeter the edges of the plate have double bends in the form of a step directed in one direction for a pair of opposing long ribs and a pair of opposite short ribs, and directed in the other direction for a pair of adjacent olozhnyh short ribs; thermocouple (8) installed at the inlet of the supply air into the heat exchanger; a control unit (9), which includes an electrical connection to the building ventilation system and a control circuit for the thermocouple and fans of the ventilation system with the function of protecting the heat exchanger from icing. As a technical result, the claimed utility model provides the ability to install the device in a supply and exhaust ventilation system of rectangular / or round ducts of sizes 120 × 60mm, 204 × 60mm, ∅ 125mm, ∅ 150 mm and ∅ 160 mm in order to recover heat (cold) of the exhaust air with an efficiency of up to 80% without icing heat exchanger at negative street temperatures, with low specific power consumption and low aerodynamic resistance.