| 摘要 |
<p>The infuser comprises a container (2), a tube (5) extending from the base (1) of the container and a filter cage at its upper end, holding the material to be infused, a heated base section (1a) and heating elements. It also has a heat pump chamber (11) formed by a dome (4) between the base and the lower end of the tube, and a valve (4a, 6) to control the passage of liquid from the container to the chamber (11) as a result of the pressure inside the chamber. The valve comprises an aperture (4a) in the top of the dome, and a washer (6) of a supple material such as silicone, which is fixed to the tube inside the dome. The dome has three valve apertures (4a) positioned symmetrically round the top, and the washer has three tongues corresponding to the positions of the apertures. The periphery of the dome has a seal (3) in contact with the heated portion of the base. The dome has additional apertures (4b) in its sides, and a covering ring (7) with ports (7b) which can be set to overlap the additional apertures.</p> |
