Filling device for motor vehicle air-conditioning systems
US6434953B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2345/007
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The invention relates to a filling device for motor vehicle air-conditioning systems which can be operated with harmless and natural refrigerants, in particular CO2. The filling device is to have a high safety standard, while at the same time being simple to operate and having a cost-effective makeup. For this purpose, the filling device comprises a connection (12) for connecting the device (10) to the air-conditioning system, a drainage line (18), containing a drainage valve (24), for draining off the refrigerant of the air-conditioning system in a defined manner, a pumping-off line (20) which has a pump (36) and is connected to the connection (12), for completely pumping off refrigerant residues and any other impurities, and a refrigerant feed line (22), connected to the connection (12), for filling the air-conditioning system with refrigerant from a refrigerant reservoir (44).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.