Heat pump with refrigerant leak detection and pump-down method
US11143439B2 · kind B2 · utility
3Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jun 24, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigeration cycle apparatus includes a gas leakage sensor and a control device. When refrigerant leakage is detected by the gas leakage sensor, the control device performs a first mode operation to operate a compressor in such a state that a four-way valve is set to a cooling operation state, an expansion valve is opened, and a first shutoff valve is closed. After performing the first mode operation, the control device performs a second mode operation to operate the compressor in such a state that the four-way valve is set to a heating operation state and the first shutoff valve is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.