| 摘要 |
PROBLEM TO BE SOLVED: To reduce the generation of noise of refrigerant flow from a capillary tube to a connecting pipe and at an inlet portion of a cooler by dividing the connecting pipe which connects the capillary tube with the cooler into a given number of flow passages. SOLUTION: A connecting pipe 8 has its inlet portion 8a connected with a capillary tube 6. The inlet portion 8a is bifurcated into two flow passages which consists of one flow passage 8b having a length Lb and the other flow passage 8c having a length Lc(≠b). These flow passages are combined at an outlet portion 8d which is connected with a cooler. In this manner, the connecting pipe 8 is divided into two flow passages 8b, 8c and their pipe length are made different from each other so that a noise of a sinusoidal wave generated in one flow passage is canceled or offset by generating a sinusoidal wave which differ in phase in the other flow passage. Accordingly, the generation of noise of the refrigerant flow at the portion of the connecting pipe 8 ranging from the capillary tube 6 to the inlet portion of the cooler can be reduced.
|
