Patent ID: 9046113
Filing Date: 2015-06-02
Classification: F04B,F04F,F16K

Abstract:
1. A Venturi tube assembly comprising: a Venturi tube having a body section, an inlet end being positioned on one side of the body section, while an outlet end being positioned on the other side of the body section, an internal flow passage being formed in the body section between the inlet end and the outlet end, a pneumatic sucking passage outward extending from a low static pressure section of the internal flow passage to an outer circumference of the body section; and a blocking member having an exhaustion space for communicating the outlet end with the atmosphere and a blocking body movable between an unblocking position and a blocking position, when positioned in the unblocking position, the outlet end communicating with the atmosphere via the exhaustion space, when positioned in the blocking position, the outlet end being blocked out of communication with the atmosphere, said Venturi tube assembly being characterized in that the blocking member further includes a micro-section movable between a full open position and a micro-position, when positioned in the full open position, the exhaustion space fully communicating the outlet end with the atmosphere, whereby a full amount of airflow is exhausted from the outlet end to the atmosphere, when positioned in the micro-position, a micro-amount of airflow smaller than the full amount being exhausted from the outlet end to the atmosphere; wherein the blocking member further has a movement space for receiving the blocking body, whereby the blocking body is movable within the movement space between the unblocking position and the blocking position; wherein the blocking member further has an end section directed to the outlet end, the movement space being formed between the outlet end and the end section and in communication with the exhaustion space; wherein the end section has a connection collar, one end of the connection collar being fixedly connected to an outer circumference of the outlet end, an interior space of the connection collar communicating with the outlet end, the end section further having an end board connected to the other end of the connection collar to block the other end of the connection collar, the end board being spaced from the outlet end by a predetermined gap for blocking the interior space of the connection collar to form the exhaustion space.