Defrost Control Using Fan Data

摘要

In various implementations, frost in a vapor compression system may be controlled. A property of a fan may be determined. A determination may be made whether a frost event and/or a nonfrost event has occurred based at least partially on the determined fan property.

主权项

1. A method of distinguishing between a frost condition and a nonfrost condition in a vapor compression system, the method comprising:
determining one or more system properties of the vapor compression system, the one or more system properties comprising at least inlet temperature and fan property; determining if an event has occurred based at least partially on at least the inlet temperature and the fan property; determining if the event is a frost condition or a nonfrost condition based at least in part upon the inlet temperature and the fan property, wherein if the fan property is greater than a predetermined value and the inlet temperature is above a predetermined temperature then a determination of a nonfrost condition is made, and if the fan property is greater than a predetermined value and the inlet temperature is below a predetermined temperature then a determination of a frost condition is made; and initiating a defrost cycle if the event is a frost condition.