Heat pump type air conditioner for vehicle
US6422308B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/274
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A heat pump type air conditioner for a vehicle has a refrigeration cycle constituted by a compressor, an external heat exchanger, a refrigerant valve unit and an internal heat exchanger unit. The refrigerant valve unit includes first and second flow control valves, and the internal heat exchanger unit includes an auxiliary internal heat exchanger and a main internal heat exchanger. In the refrigeration cycle, the first flow control valve, the auxiliary internal heat exchanger, the second flow control valve and the main internal heat exchanger are serially connected in the order of mention. The main and auxiliary internal heat exchangers change their function between an evaporator and a condenser according to the controlled state of the first and second flow control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.