Bistable electromagnetic valve

Abstract

Proposed herein is a bistable electromagnetic valve ( 1 ) with a valve chamber ( 15 ) arranged between two pole pieces ( 5, 6 ) and a valve body ( 12 ) displaceable therein between two end positions, which is designed as a magnet armature for at least one permanent magnet ( 9, 10 ) and for at least one control coil ( 3 ), which is distinguished by a particularly compact design and low production expense. This is achieved according to the invention by arranging at least one permanent magnet ( 9, 10 ) inside the valve housing ( 2 ).

1 . Bistable, electromagnetic valve with a valve chamber arranged between two pole pieces and a valve body displaceable therein between two end positions, which is designed as a magnet armature for at least one permanent magnet and for at least one control coil, characterized in that the permanent magnet ( 9 ,  10 ) is arranged inside the valve housing ( 2 ).  
     
     
         2 . Valve according to  claim 1 , characterized in that the valve chamber ( 15 ) is arranged inside the control coil ( 2 ).  
     
     
         3 . Valve according to one of the preceding claims, characterized in that at least two permanent magnets ( 9 ,  10 ) are provided.  
     
     
         4 . Valve according to one of the preceding claims, characterized in that the permanent magnet(s) ( 9 ,  10 ) is/are arranged next to a valve seat ( 17 ,  27 ).  
     
     
         5 . Valve according to one of the preceding claims, characterized in that the polarization direction of the permanent magnets ( 9 ,  10 ) runs in an axial direction.  
     
     
         6 . Valve according to one of the preceding claims, characterized in that the permanent magnet or the permanent magnets ( 9 ,  10 ) is/are designed as an annular magnet.  
     
     
         7 . Valve according to one of the preceding claims, characterized in that a spacer ring ( 11 ) is provided between two annular magnets ( 9 ,  10 ).  
     
     
         8 . Valve according to one of the preceding claims, characterized in that the valve body ( 12 ) designed as a magnet armature is spherical.  
     
     
         9 . Valve according to one of the preceding claims, characterized in that a guide ring ( 11 ) is provided for the valve body ( 12 ).  
     
     
         10 . Valve according to one of the preceding claims, characterized in that the guide ring for the valve body ( 12 ) is provided as a spacer ring ( 11 ) between the annular magnets ( 9 ,  10 ).  
     
     
         11 . Valve according to one of the preceding claims, characterized in that a filter element ( 11 ) is provided.  
     
     
         12 . Valve according to one of the preceding claims, characterized in that the filter element ( 11 ) is designed as a guide ring for the valve body.  
     
     
         13 . Valve according to one of the preceding claims, characterized in that the filter element ( 11 ) is designed as a spacer ring between the annular magnets ( 9 ,  10 ).  
     
     
         14 . Valve according to one of the preceding claims, characterized in that the valve housing ( 2 ) is comprised of a circular tube.  
     
     
         15 . Valve according to one of the preceding claims, characterized in that the housing ( 2 ) is designed as a single piece.  
     
     
         16 . Valve according to one of the preceding claims, characterized in that one or more fluid channels ( 19 ) are attached to a pole piece ( 6 ) outside the valve axis.  
     
     
         17 . Valve according to one of the preceding claims, characterized in that several peripherally distributed fluid channels ( 19 ) are attached to a pole piece ( 6 ) outside the valve axis.  
     
     
         18 . Valve according to one of the preceding claims, characterized in that a pole piece ( 6 ) exhibits a noncircular outside cross-section.  
     
     
         19 . Valve according to one of the preceding claims, characterized in that the fluid channels ( 19 ) situated outside the valve axis are routed past at least one permanent magnet ( 9 ,  10 ).  
     
     
         20 . Valve according to one of the preceding claims, characterized in that at least one pole piece ( 5 ,  6 ) is press molded or soldered with the housing.  
     
     
         21 . Valve according to one of the preceding claims, characterized in that at least one sealing element ( 32 ) is provided between a pole piece ( 5 ) and the valve housing ( 23 ).  
     
     
         22 . Valve according to one of the preceding claims, characterized in that a bead ( 20 ,  21 ) is provided inside the valve housing ( 2 ) to fix the internal structural elements in place.  
     
     
         23 . Valve according to one of the preceding claims, characterized in that the guide and/or filter and/or spacer ring ( 11 ) is designed to allow fluid through in an axial and radial direction.  
     
     
         24 . Valve according to one of the preceding claims, characterized in that an external coarse filter is provided.  
     
     
         25 . Valve according to one of the preceding claims, characterized in that it is designed as a 2/2-way valve.  
     
     
         26 . Valve according to one of the preceding claims, characterized in that it is designed as a 3/2-way valve.  
     
     
         27 . Valve according to one of the preceding claims, characterized in that a central tube is connected fluid-tight with a pole piece ( 6 ) inside the valve housing ( 2 ).  
     
     
         28 . Valve according to one of the preceding claims, characterized in that a sealing element is provided between the central tube ( 24 ) and the accompanying pole piece ( 6 ).  
     
     
         29 . Valve according to one of the preceding claims, characterized in that the tubular valve housing is designed as a T-piece or Y-piece.  
     
     
         30 . Refrigerating circuit for a refrigeration system, in particular with several refrigerating compartments, with a compressor, a condenser, several evaporators, which each are allocated to one of the refrigerating compartments, as well as at least one electric control valve for connecting the condenser with one or more of the evaporators based on predetermined operating modes, characterized in that the control valve ( 1 ) is designed according to one of the preceding claims.  
     
     
         31 . Household appliance with a refrigerating circuit, in particular a refrigerator or freezer chest, characterized in that the refrigerating circuit is designed according to  claim 30.