Ventilation plant
US4815522A · kind A · utility
Inventor
Key dates
| Filing date | Aug 14, 1984 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Aug 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/015
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A ventilation plant for recovering heat from the outlet air and preheating the inlet air consists of a valve housing (10) including two fans (15, 16) for controlling the flow of air in two duct pipes (17, 18) connected to the surrounding atmosphere. An accumulator tube (17A, 18A), coupled into these two pipes, comprises a number of loosely inserted rolls (21) of pleated metal foil to achieve a great number of axial ducts communicating (24, 25) with one another at the roll ends. In one position the valve (26) leads the inlet air through one of the duct pipes and out through an outlet (13) in the valve housing at the same time as the outlet air is led into the other duct pipe and out to the surrounding atmosphere, or vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.