发明名称 |
System and method for oil return in an HVAC system |
摘要 |
A system and a method are provided for returning oil in a heating, ventilation, and air conditioning (HVAC) system by determining when an ambient zone temperature is equal to or less than a temperature limit and reversing a direction of refrigerant flow of the HVAC system based on the length of time. Also, a system and a method are provided for monitoring the length of operation in a first and a second heating mode and for reversing a direction of refrigerant flow based on the length of time operation occurs in the first and second heating modes. A system and a method having a first compressor, a first heating mode, a second heating mode, a defrost mode, and a controller is disclosed. The controller selectively controls initiation of the defrost mode in response to an HVAC system operating in a heating mode of operation for a predetermined amount of time. |
申请公布号 |
US8327658(B2) |
申请公布日期 |
2012.12.11 |
申请号 |
US20080272518 |
申请日期 |
2008.11.17 |
申请人 |
DOUGLAS JONATHAN D.;EDENS JOHN R.;MARBLE ALAN D.;MERCER KEVIN B.;SAPP GARY L.;SCHAEFER, JR. JAMES T.;SCHAEFER KRISTEN L.;TICE STEVEN A.;TRANE INTERNATIONAL, INC. |
发明人 |
DOUGLAS JONATHAN D.;EDENS JOHN R.;MARBLE ALAN D.;MERCER KEVIN B.;SAPP GARY L.;SCHAEFER, JR. JAMES T.;SCHAEFER KRISTEN L.;TICE STEVEN A. |
分类号 |
F25B13/00;F25D21/06 |
主分类号 |
F25B13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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