Method for reducing transient defrost noise on an outdoor split system heat pump
US9239183B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2013 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Feb 2, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for reducing perceived defrost noise in a heat pump is provided. The method may include energizing a fan configured to urge a heat transfer medium across a heat exchanger, and initiating a defrost cycle to warm the heat exchanger. Initiating the defrost cycle may include de-energizing a compressor fluidly coupled to the heat exchanger, and delaying for a first delay period with the fan energized and the compressor de-energized. Initiating the defrost cycle may also include energizing a reversing valve after the first delay period, to reverse a flow of a refrigerant flow between the compressor and the heat exchanger, and delaying for a second delay period with the fan energized, the compressor de-energized, and the reversing valve energized. Initiating the defrost cycle may also include de-energizing the fan. The method may also include defrosting the heat pump during the defrost cycle, and terminating the defrost cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.