| 摘要 |
1. Pressure-responsive device using a diaphragm of the type comprising a body (10) which defines a pressure chamber (12) communicating with a fluid of which one wishes to control the pressure and which is defined on one side by a deformable diaphragm (20), a movable arrangement (100) acted upon by the diaphragm (20), opposite the chamber (12) and sensitive to the movements of the diaphragm and a cover (40) closed off in a sealed manner by the diaphragm and surrounding the movable arrangement, characterised by the fact that it comprises, between the diaphragm (20) and the movable arrangement (100), a temperature-compensating member (203) whereof the length lambda considered in the direction of transmission of movement is determined by the relationship : see diagramm : EP0194188,P6,F1 in which DELTA PM represents the maximum pressure variation of the fluid, DELTA IM represents the movement of the diaphragm (20) induced by the maximum pressure variation DELTA PM alpha lambda represents the coefficient of expansion under the influence of temperature of the compensation member (203), and SIGMA alpha n In represents the sum of the products of the coefficients of thermal expansion alpha n and of the lengths In of the members (201, 14, 140, 141, 116, 101), occurring in the positioning of the movable arrangement with respect to the body of the responsive device. |
