Refrigeration cycle for vehicle air conditioner
US6244060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2000 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Jul 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigeration cycle for a vehicle air conditioner has a bypass passage between a compressor and an evaporator. In a heating mode, high-temperature gas refrigerant discharged from the compressor is directly introduced into the evaporator through the bypass passage while bypassing a condenser to improve a heating performance of the air conditioner. When a refrigerant recovery mode in which refrigerant staying in the condenser is forced to be discharged and introduced into the evaporator is set, a passage between the condenser and the evaporator in which a thermostatic expansion valve is disposed is controlled to be opened a predetermined amount. As a result, refrigerant staying in the condenser is securely returned to the evaporator even when a temperature of outside air is extremely low and the expansion valve is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.