| 摘要 |
FIELD: machine building.SUBSTANCE: operation method of a valve controlling a cooling agent flow in a cooling system, which contains the first valve part (1) having at least one hole (2, 5) and the second valve part (3) having at least one hole (4, 6) where the first (1) and the second (3) valve parts are installed so that they can perform relative movements. Relative location of the hole or holes (2, 5) of the first valve part (1) and the hole or holes (4, 6) of the second valve part (3) creates the valve opening degree due to an overlap area of hole (2, 5) of the first valve part (1) and hole (4, 6) of the second valve part (3); with that, the method provides for the following: movement of the first valve part (1) and/or the second valve part (3) from the position determining maximum degree of the valve opening to the position determining minimum valve opening so that relative movement speed of the first valve part (1) and the second valve part (3) changes as a function of surface area of the overlap area between hole (2, 5) of the first valve part (1) and hole (4, 6) of the second valve part (3). Besides, the speed decreases at reduction of surface area of the overlap area. Relative movement speed between the first valve part (1) and the second valve part (3) also depends on the required mass flow rate of cooling agent flowing through the valve so that when load on cooling systems requires large amount of cooling agent supplied to an evaporator, thus requiring high mass flow rate of cooling agent flowing through an expansion valve, there provided is such relative movement speed of valve parts (1, 3), which can lead to pressure pulsation when load on cooling systems requires lower amount of cooling agent supplied to the evaporator, which requires lower mass of cooling agent flow passing through the expansion valve.EFFECT: such relative movement speed of valve parts is provided, which prevents a hydraulic impact.7 cl, 8 dwg |
