Patent ID: 9234684
Filing Date: 2016-01-12
CPC Classification: F16K,F25B,Y10T

Claim Text:
1. A refrigerant passage change-over valve configured to switch a refrigerant passage in a refrigerant circuit, the valve comprising: a valve case including a plurality of ports; a valve body configured to rotate in the valve case and slide on openings of predetermined ones of the ports to switch a communication state among the ports; a motor configured to rotate the valve body; and a controller configured to control a rotation speed of the motor in accordance with a differential pressure between internal and external pressures of the valve body, wherein the controller is configured to control the rotation speed of the motor such that a first non-zero rotation speed with a first differential pressure is larger than a second non-zero rotation speed with a second differential pressure higher than the first differential pressure, and the controller is configured to control the rotation speed of the motor to be constant at the first non-zero rotation speed or the second non-zero rotation speed during an entire switching operation of the valve body.