Mixing valve with axially segmented stator windings for axially positioning a control element for controlling the fluid connection between inlets and outlets
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United States of America Patent
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Sep 16, 2003
Grant Date -
N/A
app pub date -
Jul 9, 2002
filing date -
Jul 24, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a mixing valve with at least two inlets and at least one outlet. A control element is configured as a pump wheel controls the fluid connection between the inlets and the outlets. The pump wheel is connected to a hollow shaft which is rotated by an electric motor and axially displaced through selective actuation of axially displaced stator segments. In a fist axial position of the pump wheel, a first inlet is communicated with the outlet and a second inlet is shut off, and in a second axial position the second inlet is communicated with the outlet and the first inlet is shut off. In a third an intermediate axial position, the two inlets communicate with the outlet allowing fluid mixing within a pump chamber. In a further embodiment of the device, the pump wheel includes a rotatable member to impel fluid through the pump chamber and the outlet. The device unites the mixing valve and the circulation pump in one fitting.
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