| 摘要 |
PURPOSE:To reduce noise by employing reinforcement plates welded at equally divided four positions along the inner circumference of a closed case and between a compression element and an electric motor. CONSTITUTION:A reinforcement plate 19 being on a same center line with a communication passage 16 and between a block 3 and an electric motor 2 makes the communication passage 16 directly communicate with a space 17 on a double cylinder. A recess of a portion 19c rising to an end 19b has a sufficient room for passing refrigerant and a portion 19d rising to an end 19a extends more than 1/4 of the circumference of the closed case 1. Accordingly, noise can be reduced by suppressing the loop of the vibration mode of the closed case. |
