Ion exchange device with chamber having indicator means
AssigneeBrita Wasser-Filter-Systeme GmbH
InventorsRolf Belz, Barthold Conradt
Life of this patent
Estimating the term…
Abstract
In an apparatus for water treatment and comprising a pod containing a weakly acid or weakly basic ion exchanger and of which the inlet aperture is formed in the region of one end while the outlet orifice is formed in the region of the other end, in each case by a means which is permeable to liquid while retaining the ion exchanger, in order to render visible the fact that the ion exchanger is exhausted, there is in the region of the outlet orifice of the pod a chamber containing a strongly acid or strongly basic ion exchanger with a color indicator bonded thereon and the walls of which consist at least partially of a transparent material.
Claims26
A liquid treatment device comprising:
- (a) pod means for containing a weak acid or weak base ion exchange material;
- (b) inlet means mounted to said pod means for the inlet of liquid into said pod means;
- (c) outlet means, to outlet said liquid from said pod means, mounted to said pod means at a remote position, on said pod means, from the position of said inlet means;
- (d) weak acid or weak base ion exchange material, which functions to treat said liquid, retained within said pod means;
- (e) means for retracting said weak acid or weak base ion exchange material within said pod means, said means for retaining which are permeable to liquids;
- (f) chamber means in the region of said outlet means laterally from or aligned with said pod means and connecting with the interior of said pod means such that the main flow through said device does not pass through said chamber means, at least one wall of said chamber means comprising, at least partially, a transparent material;
- (g) within said chamber means a small amount of strong acid or strong base ion exchange material in comparison with the quantity of the weak acid or weak base ion exchange material in the pod, said strong acid or strong base ion exchange material having bonded thereto an indicator means which functions by changing its colour at a predetermined pH;
- and
- (h) means for separating said strong acid or strong base ion exchange material from said weak acid or weak base ion exchange material, said means for separating providing communication of liquid between said strong acid or strong base ion exchange material and said weak acid or weak base ion exchange material.
A water treatment device, containing a weak acid or a weak base ion exchanger, comprising a pod which includes an inlet aperture in the region of one end and an outlet aperture in the region of the other end, said inlet aperture and said outlet aperture which comprise liquid permeable means which are both permeable to liquids and which retain said weak acid ion exchanger, wherein in the region of said outlet aperture of said pod, there is a chamber connecting with the interior of said pod such that the main flow through said device does not pass through said chamber, said chamber containing a strong acid of strong base ion exchanger, with a colour indicator bonded to said strong acid ion exchanger, at least one wall of said chamber which comprises, at least partially, a transparent material wherein said liquid permeable means comprises at least one filter means disposed obliquely to the cross-sectional area of said pod.
A water treatment device, containing a weak acid or a weak base ion exchanger, comprising a pod which includes an inlet aperture in the region of one end and an outlet aperture in the region of the other end, said inlet aperture and said outlet aperture which comprise liquid permeable means which are both permeable to liquids and which retain said weak acid ion exchanger, wherein in the region of said outlet aperture of said pod, there is a chamber connecting with the interior of said pod such that the main flow through said device does not pass through said chamber, said chamber containing a strong acid or strong base ion exchanger, with a color indicator bonded to said strong acid ion exchanger, at least one wall of said chamber which comprises, at least partially, a transparent material wherein at its end said pod has said outlet aperture and upstream thereof, in the direction of flow, there is provided a lateral liquid communication means which functions to provide liquid communication with said chamber containing said strong ion exchanger.
Dependencies are inferred from the claim text.