Transport refrigeration unit with vented cryogenic cooling
US10871312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2020 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Mar 23, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B23/0283
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A Transport Refrigeration Unit (TRU) includes one or more evaporators inside the TRU each containing two manifold tubes located at opposite ends of the evaporator and a multiplicity of cooling tubes traversing between the manifold tubes; one or more super-insulated vacuum tanks located in front of, beneath or inside the TRU, filled with liquid nitrogen, carbon dioxide or a cryogenic coolant connected to the one or more evaporators using vacuum-insulated pipes; a solenoid or pneumatic valve located upstream or downstream of the evaporator to meter a flow of nitrogen through the evaporator; a temperature controlling circuit that operates the solenoid or pneumatic valve; a flow restricting device that limits the flow of the cryogenic coolant through the evaporator; a vent pipe to vent the spent coolant outside the TRU; and a multiplicity of fans located adjacent to and above the evaporators that distribute the cooled air uniformly throughout the TRU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.