Pressure head with foaming function

Abstract

A pressure head with foaming function mounted onto a container with liquid substances includes a low-pressure suction force generator with a reducing port set into the discharge pipe of the pressure head, such that liquid already absorbed to the discharge pipe can flow through the guide port of the discharge pipe. The liquid is then collected and extruded from the reducing port, thus increasing the flow speed and reducing the pressure to generate a low-pressure suction force. An it guide port is arranged onto the discharge pipe and also located at a spacing with the reducing port. While the liquid is extruded from the reducing port to generate low-pressure suction force, air out of the discharge pipe is absorbed from the air guide port to the discharge pipe, such that an is mixed with liquid, making the liquid extruded from the discharge pipe foamed.

1 . A pressure bead with foaming function, wherein the pressure bead is mounted onto a container with liquid substances, said pressure head comprising:
 a main body, comprising of a main tube body with a piston member, a pressing portion connected at top of the main tube body, and a liquid suction portion connected at lower part of the main tube body; of which the pressing portion comprises of a discharge pipe with guide ports:, when the pressing portion is triggered for reciprocating motion, the piston member absorbs liquid in the container from the liquid suction portion and then the liquid accumulated in the piston member is absorbed into the discharge pipe;   a low-pressure suction force generator, annularly arranged at a preset location of the discharge pipe:   a reducing port, formed onto the low-pressure suction force generator in an axial penetration state; when liquid is absorbed to the discharge pipe through the guide port, it is then collected and extruded from the reducing port of low-pressure suction force generator, thus increasing the flow speed of liquid and reducing the pressure to generate a low-pressure suction force; and   at least an air guide port, arranged at a preset location of the discharge pipe, and also located at a spacing with the reducing port of the low-pressure suction force generator; while the liquid is extruded from the reducing port to generate low-pressure suction force, air out of the discharge pipe is absorbed from the air guide port to the discharge pipe, such that air is mixed with liquid, making the liquid extruded from the discharge pipe in a foaming state.   
     
     
         2 . The device defined in  claim 1 , wherein a guide column is formed in said discharge pipe, while said guide port is formed between the guide column and inner wall of the discharge pipe; and the low-pressure suction force generator is sleeved into the discharge pipe, opposite to the guide column at a spacing. 
     
     
         3 . The device defined in  claim 2 , wherein a guide wall of predefined shape is formed at inner Surface of the low-pressure suction force generator, such that the periphery of the guide column could be mated with the guide wall so as to guide the liquid already absorbed to the discharge pipe;
 of which, a guide groove of predefined shape is formed on the low-pressure suction force generator adjacent to the end wall of the reducing port, such that liquid can be guided to the reducing port by the guide groove.   
     
     
         4 . The device defined in  claim 2 , wherein said discharge pipe comprises of an education tube protruded from the pressing portion and a supplementary tube fitting mated with the education tube; of which said guide column is formed into the supplementary tube fitting, and the air guide port is opened on the periphery of the supplementary tube fitting;
 of which, a mating portion is set correspondingly to the periphery of the education tube and the inner side of the supplementary tube fitting, so that the supplementary tube fitting and the low-pressure suction force generator are incorporated and connected to the education tube.