| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the fuel consumption by arranging, between a low pressure refrigerant passage and a suction chamber, a differential pressure sensitive opening/ closing valve opened, when the differential pressure between the a discharge chamber and a low-pressure refrigerant pipe is larger than the prescribed pressure and closed when it is smaller than that. SOLUTION: A main valve 21 of a differential pressure sensitive opening/closing valve 20 is arranged in a valve seat 22 between a low-pressure refrigerant passage 1 and a suction chamber 3 opposed thereto from the upstream side. Since the pressure receiving area of the piston body 23 and the cross section of the valve seat 22 are same, the pressure Ps of the suction chamber between the main valve 21 and the piston body 23 is cancelled and the differential pressure between the pressure Pd in the discharge chamber 4 and the pressure Pe in the low-pressure refrigerant passage 1 acts on the integrated valve 21 and piston body 23. When the differential pressure between the pressure Pd in the discharge chamber 4 and the pressure Pe of the low- pressure refrigerant passage 1 is larger than the energizing force of a compression coil spring 26, the main valve 21 is separated from the valve seat 22 to be in an opened valve state, and when the differential pressure is smaller than the energizing force of the compression coil spring 26, it is thrust against the valve seat 22 to be in a closed valve state.</p> |
