Pressure sensor for detecting the pressure of a liquid
AssigneeSiemens Aktiengesellschaft
InventorManfred Weigl
Life of this patent
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Abstract
A pressure sensor includes a pressure sensor element that is provided with a pressure sensor membrane. The pressure sensor element is held in a receiving part in a defined position during operation within a permissible operating pressure range by a spring element. When the permissible range is exceeded, a relative movement, acting against the spring force, between the pressure sensor element and the receiving part takes place, thereby increasing the volume of the space immediately upstream of the pressure sensor membrane. The design allows for a limitation of the pressure and for an effective protection of the pressure sensor membrane when the liquid is frozen.
Claims7
A pressure sensor for sensing the pressure of a fluid, comprising:
- a pressure sensor element having a pressure sensor diaphragm,
- a holding part for holding the pressure sensor element, and
- at least one spring element being used to hold the pressure sensor element within a working pressure range of the pressure sensor element being in a defined solution in the holding part, said at least one spring element limiting the pressure on the pressure sensor diaphragm when a working pressure range of the pressure sensor element is exceeded, whereby the pressure sensor diaphragm may be wetted directly by the fluid.
Dependencies are inferred from the claim text.