主权项 |
1. An expansion apparatus comprising:
a main body including
a valve chest to which a refrigerant is led,a lead-in passage through which the refrigerant is led to the valve chest,a lead-out passage through which the refrigerant led to the valve chest is led out,a first narrow portion formed between the lead-in passage and the valve chest, anda second narrow portion formed between the valve chest and the lead-out passage, the second narrow portion having a flow passage area smaller than that of the first narrow portion; and a refrigerant flow rate adjustment mechanism including
a valve body disposed in the valve chest,a closing device biasing the valve body disposed in the valve chest in a direction in which the second narrow portion is closed, andan opening device capable of biasing the valve body in a direction in which the second narrow portion is opened, wherein the valve chest has a space around the valve body and the first narrow portion is formed so as to face the space around the valve body. |