| 摘要 |
<p>The invention relates to a vapour recovery pump (1) for a fuel dispensing unit. The vapour recovery pump (1) comprises a pump housing (2) with a first chamber (3), a second chamber (4) and a third chamber (5), each one of said chambers (3, 4, 5) having a vapour port (8, 9, 12). The first and second chambers (3, 4) being separated by a first piston (6) comprising a first vapour inlet valve (17), and the second and third chambers (4, 5) being separated by a second piston (7) comprising a second vapour inlet valve (18). The first and second pistons (6, 7) are arranged to move reciprocally and out of phase in relation to each other such that the volumes of the chambers (3, 4, 5) repeatedly decrease and increase to allow a flow of vapour between the first and third chambers (3, 5), and the second chamber (4). The invention also relates to a fuel dispensing unit for refueling vehicles.</p> |
