Valve needle assembly and electronic expansion valve having the valve needle assembly
AssigneeEmerson Climate Technologies (Suzhou) Co., Ltd.
InventorLiang CHEN
Life of this patent
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Abstract
A valve needle assembly includes a valve stem, a valve needle, an elastic element, and a stop structure. The valve needle is connected to the valve stem and axially movable relative to the valve stem. The elastic element is provided between the valve stem and the valve needle. The stop structure is configured to limit axial movement of the valve needle relative to the valve stem so as to prevent the valve needle from prematurely opening the valve hole of the electronic expansion valve under the force of fluid. The electronic expansion valve includes the valve needle assembly.
Claims20
A valve needle assembly for an electronic expansion valve, comprising:
- a valve stem adapted to move in an axial direction under drive of a drive mechanism of the electronic expansion valve;
- a valve needle coupled with the valve stem so that the valve needle is movable in the axial direction relative to the valve stem;
- an elastic member arranged between the valve stem and the valve needle and adapted to apply force to the valve needle;
- and
- a stop structure comprising a first stopper arranged on the valve stem and a second stopper arranged on the valve needle, the first stopper and the second stopper being adapted to abut against each other to limit the valve needle from moving relative to the valve stem in a first direction of opening the electronic expansion valve to open the electronic expansion valve in a closed state of the electronic expansion valve.
Dependencies are inferred from the claim text.