Linearly actuated automatic fresh air exchange
US6945071B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2004 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Aug 2, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D29/003
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Fresh air exchange is achieved by uncovering two ports which, respectively, allow stale air to leave the trailer through a high pressure duct and fresh outside air to enter the trailer through a low pressure duct. The trailer end of the ducts are connected to the refrigeration unit evaporator section where the evaporator fan provides the pressure differential. The opposite ends of the ducts are connected to a bracket mounted on the refrigeration unit frame and are exposed to the outside fresh air through a hole in the refrigeration unit's grille when the cover over the ducts has been opened by the linear solenoid under the control of the microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.