发明名称 |
CONTROL DEVICE FOR VARIABLE DISPLACEMENT COMPRESSOR, AND CONTROL METHOD FOR THE VARIABLE DISPLACEMENT COMPRESSOR |
摘要 |
A control method controlling a compression capacity of a variable capacity compressor (8), using a capacity control valve (13) which senses a pressure difference between a high pressure (Pd) and a low pressure (Ps) in a refrigeration cycle (7a), including: calculating a target duty factor (Dt1) for the capacity control valve (13) based on a target evaporator-exit temperature (TMeva) and an actual evaporator-exit temperature (Teva); calculating a driving torque (Trq2) of the compressor (8) as an upper-limit driving torque (Trq2) based on a high pressure (Pd) under an assumption that the compressor (8) is in a full-stroke state; calculating an estimated driving torque (Trq1) of the compressor (8) based on an actual control electric current (Isolc); and selecting the target duty factor (Dt1) as an output duty factor (Dtc) when the estimated driving torque (Trq1) is smaller than the upper-limit driving torque (Trq2), and selecting a duty factor (Dt2) calculated based on the upper-limit driving torque (Trq2) as the output duty factor (Dtc) when the estimated driving torque (Trq1) is equal to or larger than the upper-limit driving torque (Trq2).
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申请公布号 |
EP2050958(A1) |
申请公布日期 |
2009.04.22 |
申请号 |
EP20070792278 |
申请日期 |
2007.08.09 |
申请人 |
CALSONIC KANSEI CORPORATION |
发明人 |
TAKAHASHI, EIJI |
分类号 |
F04B27/14;B60H1/32;F04B49/06 |
主分类号 |
F04B27/14 |
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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