Danfoss A/s

Jens K Jark

Claus J Johansen

Thorvardur S Stefansson

The invention relates to a magnetic valve for a refrigeration plant. The valve is of the type having a magnetic coil with a plug member of magnetic material projecting into a central bore thereof. The yoke has parallel limbs. A housing block member is mounted in fixed relation to the coil and in spaced relation to the plug member to provide an armature space. A plunger type armature is disposed in the armature space where its stroke is limited at both ends thereof. The armature has a first end face magnetically pulled against the plug when the coil is energized and a return spring opposing the energizing force of the coil. The armature has a second end face at the other end thereof which is pushed into engagement with said housing block member by the return spring when the coil is deenergized. Layers of refrigerant-proof plastics such as polytetrafluoroethylene form one or both of the end faces of the engaging end faces between the plug member and the armature and between the armature and the housing block member. A resilient connection is provided between the plug member and the yoke to provide for cushioned relative movement therebetween.

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Sonderborg, Denmark

Jens K Jark