Pumping arrangement for a household water purifier

• US 20040007526A1
• Filed: 06/19/2003
• Published: 01/15/2004
• Est. Priority Date: 05/18/2000
• Status: Abandoned Application

• Current Assignee: Dometic Sweden AB (Dometic Group AB)
• Original Assignee: Dometic Sweden AB (Dometic Group AB)
• Inventors: Dellby, Frederik, Haegermarck, Anders
• Application Number:
  US10/276,388
• Publication Number:
  US 20040007526A1
• Time in Patent Office: Days
• US Class Current: 210/650
• CPC Class Codes: B01D 61/10 Accessories; Auxiliary operations
• CPC Class Codes: B01D 61/20 Accessories; Auxiliary operations
• CPC Class Codes: F04C 2/344 with vanes reciprocating with respect to the inner member
• CPC Class Codes: F04C 23/005 of dissimilar working principle

Abstract

This invention relates to a device for a household water purifier in which raw water is pressurized and is filtered by means of inverted osmosis, ultra or nanofiltration or the like. The device is provided with a central unit having a first part (10) comprising a vane pump (12) with a pump housing (16) and a second part (11) comprising a filter connected to the first part. The first part (10) is shaped of plastic or the like and the pump housing is (16) at least partly surrounded by a liner (17), which consists of a material which differs from the material of the pump housing, and the liner (17) is at least partly surrounded by the first part (10).

Claims

1. A device for a household water purifier in which raw water is pressurized and is filtered by means of inverted osmosis, ultra or nanofiltration or the like the device comprising:

a central unit having a first part (10) containing a vane pump (12) with a pump housing (16) and a second part (11) connected to the first part containing a filter characterized in that the first part (10) is shaped of plastic;

the pump housing (16) is at least partly surrounded by a liner (17) made of a first material which differs from a second material in the pump housing; and

the liner (17) is at least partly surrounded by the first part (10).

2. A device according to claim 1, characterized in that the liner (17) comprises a metal sleeve, preferably of brass.

3. A device according to claim 1 or 2 characterized in that the liner (17) has a mainly circular section, the liner being arranged in a mainly cylindrical recess (18) of the first part (10).

4. A device according to claim 3 characterized in that the pump housing (16) is cylindrical and has an outer diameter which joins the inner diameter of the liner (17).

5. A device according to any of the preceding claims characterized in that the vane pump (12) is driven by a shaft, and the shaft (14) also supports an impeller (25) for a circulation pump (13).

6. A device according to any of the preceding claims characterized in that the first part (10) has at least one socket with an associated valve arrangement, and a first socket (31) forms an inlet for water which is arranged to communicate with inlet channels (19) in the pump housing (16).

7. A device according to claim 6 characterized in that the first part (10) has a cup-shaped recess forming a wall (26) surrounding the impeller (25) of the circulation pump (13).

8. A device according to claim 7 characterized in that the first socket (31) also is connected to a connection channel (27) ending in the wall (26).

9. A device according to claim 7 characterized in that a second socket (35) is arranged to constitute an outlet for unpurified water, the second socket supporting an outlet valve arrangement (36) comprising a restriction (39) arranged in parallel to a flow controlled valve.

10. A device according to claim 9 characterized in that the flow controlled valve comprises a floating body (37) arranged in the first part (10).