| 摘要 |
The invention concerns a vacuum generating device wherein the vacuum pump body (1) comprises cavities forming regulating chambers (12), closed at their ends by closure means such as sealing plus (26, 27), and run through by an exchange pipe (14) wherein flows a liquid coolant coming from a heat source. The regulating chamber (12) is connected by a pipe wherein flows thermal conduction liquid (17) which, through a piston (18) stressed by an actuator (19), adjusts the upper level (22) of a thermal conduction liquid (1) in the regulating chamber (12), thereby modifying the thermal conductance between the pump body (1) and the liquid coolant flowing in the exchange pipe (14). Thus the risk of scale deposit is reduced in the exchange pipe (14) of a vacuum pump (1), while controlling the temperature of the pump body (1).
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