发明名称 |
AKTIVERINGSANORDNING FOR INDSTILLING AF EN VENTILS LUKKESTYKKE |
摘要 |
<p>The invention relates to a valve assembly. A closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias which is directly related to the temperature of the liquid phase. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure to be maintained in the chamber. A pilot valve unit is disposed between the valve closure member and the movable wall. An expansible chamber behind the closure member houses a spring for biasing in a valve closing direction. A bypass throttle passage has a first section extending from the valve inlet to the expansible chamber and a second section extending from the expansible chamber to the valve outlet. The pilot valve unit includes a valve element operably connected to the movable wall for controlling fluid flow through the second bypass section and thus control the opening of the valve closure element.</p> |
申请公布号 |
DK154579(C) |
申请公布日期 |
1989.04.17 |
申请号 |
DK19780004846 |
申请日期 |
1978.10.31 |
申请人 |
DANFOSS A/S |
发明人 |
HUELLE, ZBIGNIEW RYSZARD;NIELSEN, LEIF |
分类号 |
F16K31/68;F03G7/06;F25B41/06;G05D23/20;(IPC1-7):F16K31/00;G05D23/00;F25B49/00 |
主分类号 |
F16K31/68 |
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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