| 摘要 |
The present invention relates to a compression chamber unit ( 1 ) of an air pump, comprising a cylindrical body part ( 3 ) provided with at least one outlet nozzle ( 4 ), a number of connecting flanges ( 6 ) and a number of connecting bosses ( 7 ), wherein the cylindrical body part ( 3 ) is an extruded cylinder and a cap ( 2 ) is formed with outlet nozzle ( 4 ), connecting flanges ( 6 ) and connecting bosses ( 7 ), where the cap ( 2 ) is adapted to engage with a first end part ( 10 ) of the cylindrical body part ( 3 ). The present invention further more relates to a method for forming a compression chamber unit ( 1 ) which method comprises the following steps: the cylindrical body part ( 3 ) is extruded, and the cap ( 2 ) is moulded onto the cylindrical body part ( 3 ).
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