Patent ID: 8960213
Filing Date: 2015-02-24
Classification: F16K,F25B,Y10T

Abstract:
1. A method for operating a valve comprising a first valve part having at least one opening formed therein and a second valve part having at least one opening formed therein, the first valve part and the second valve part are each in the form of a substantially circular disk with relative movements being rotational, wherein at least one of the circular disks can rotate about an axis extending through the center of each of the circular disks, the first and second valve parts being adapted to perform relative movements, the relative position of the at least one opening of the first valve part and the at least one opening of the second valve part defining an opening degree of the valve by means of an overlapping area of the at least one opening of the first valve part and the at least one opening of the second valve part, the method comprising the steps of: providing a required mass flow of refrigerant through the valve; moving the first valve part and/or the second valve part from a position defining a maximum opening degree of the valve towards a position defining a minimum opening degree of the valve in such a manner that a velocity of a relative movement between the first valve part and the second valve part varies as a function of the overlapping area between the at least one opening of the first valve part and the at least one opening of the second valve part, in such a manner that the velocity is decreased as the overlapping area decreases; and increasing the relative velocity after the position defining the minimum opening degree has been reached until the valve parts reach a fully closed position where no relative movement occurs between the first valve part and the second valve part; wherein the step of moving the first valve part and/or the second valve part comprises the steps of: