Invention Grant
- Patent Title: Combined operation and control of suction modulation and pulse width modulation valves
- Patent Title (中): 吸入调制和脉宽调制阀的组合操作和控制
-
Application No.: US12516222Application Date: 2007-02-13
-
Publication No.: US09139066B2Publication Date: 2015-09-22
- Inventor: Alexander Lifson , Michael F. Taras
- Applicant: Alexander Lifson , Michael F. Taras
- Applicant Address: US CT Farmington
- Assignee: Carrier Corporation
- Current Assignee: Carrier Corporation
- Current Assignee Address: US CT Farmington
- Agency: Carlson, Gaskey & Olds, PC
- International Application: PCT/US2007/003693 WO 20070213
- International Announcement: WO2008/100250 WO 20080821
- Main IPC: F25B41/04
- IPC: F25B41/04 ; F25B1/00 ; B60H1/00

Abstract:
A refrigerant system is provided with a pulse width modulation suction valve and a second valve on a line that bypasses the pulse width modulation suction valve. This second valve has a variable opening. In this manner, the pressure within the compressor shell is maintained at the lowest possible level regardless of the system operating conditions, when the pulse width modulation suction valve is cycled to a closed position. Further, the second valve can continue providing capacity control, should the pulse width modulation suction valve fail.
Public/Granted literature
- US20100064702A1 COMBINED OPERATION AND CONTROL OF SUCTION MODULATION AND PULSE WIDTH MODULATION VALVES Public/Granted day:2010-03-18
Information query