Scroll compressor and refrigeration apparatus

A scroll compressor comprising:

• a movable scroll;
• a fixed scroll defining a fluid chamber together with the movable scroll, the fixed scroll having a suction passage that guides a refrigerant to the fluid chamber;
• a suction pipe having one end portion inserted into the suction passage;
• and
• a suction check valve arranged in the suction passage, the suction check valve being configured to open and close an open end of the suction pipe,
• the suction check valve including
• a valve body configured to close the open end of the suction pipe,
• a valve seat arranged in the suction passage and facing the valve body, and
• a compression spring arranged between the valve body and the valve seat to bias the valve body toward the open end of the suction pipe,
• the valve body including a first bottom portion, and a first circumferential wall extending toward the valve seat along a peripheral portion of the first bottom portion,
• the valve seat including a second bottom portion, and a second circumferential wall extending toward the valve body along a peripheral portion of the second bottom portion,
• an outside diameter D1 of the first circumferential wall and an innermost inside diameter d2 of an open end of the second circumferential wall satisfying D1<d2, and
• an inner circumferential surface of the second circumferential wall having an inner groove that extends along a direction of expansion and contraction of the compression spring.

A scroll compressor comprising:

• a movable scroll;
• a fixed scroll defining a fluid chamber together with the movable scroll, the fixed scroll having a suction passage that guides a refrigerant to the fluid chamber;
• a suction pipe having one end portion inserted into the suction passage;
• and
• a suction check valve arranged in the suction passage, the suction check valve being configured to open and close an open end of the suction pipe,
• the suction check valve including
• a valve body configured to close the open end of the suction pipe,
• a valve seat arranged in the suction passage and facing the valve body, and
• a compression spring arranged between the valve body and the valve seat to bias the valve body toward the open end of the suction pipe,
• the valve body including a first bottom portion, and a first circumferential wall extending toward the valve seat along a peripheral portion of the first bottom portion,
• the valve seat including a second bottom portion, and a second circumferential wall extending toward the valve body along a peripheral portion of the second bottom portion,
• an outside diameter D1 of the first circumferential wall and an innermost inside diameter d2 of an open end of the second circumferential wall satisfying D1<d2,
• the suction passage extending along an axial direction of the suction pipe and being open to a surface of the fixed scroll that faces the movable scroll, and
• the valve seat being fitted into an opening of the suction passage to close the opening.

A scroll compressor comprising:

• a movable scroll;
• a fixed scroll defining a fluid chamber together with the movable scroll, the fixed scroll having a suction passage that guides a refrigerant to the fluid chamber;
• a suction pipe having one end portion inserted into the suction passage;
• and
• a suction check valve arranged in the suction passage, the suction check valve being configured to open and close an open end of the suction pipe,
• the suction check valve including
• a valve body configured to close the open end of the suction pipe,
• a valve seat arranged to face the valve body, and
• a compression spring arranged between the valve body and the valve seat to bias the valve body toward the open end of the suction pipe,
• the valve body including a first bottom portion, and a first circumferential wall extending toward the valve seat along a peripheral portion of the first bottom portion,
• the valve seat including a second bottom portion, and a second circumferential wall extending toward the valve body along a peripheral portion of the second bottom portion,
• an inside diameter d1 of an open end of the first circumferential wall and an outside diameter D2 of the second circumferential wall satisfying D2<d1, and
• an inner circumferential surface of the first circumferential wall having an inner groove that extends along a direction of expansion and contraction of the compression spring.

A scroll compressor comprising:

• a movable scroll;
• a fixed scroll defining a fluid chamber together with the movable scroll, the fixed scroll having a suction passage that guides a refrigerant to the fluid chamber;
• a suction pipe having one end portion inserted into the suction passage;
• and
• a suction check valve arranged in the suction passage, the suction check valve being configured to open and close an open end of the suction pipe,
• the suction check valve including
• a valve body configured to close the open end of the suction pipe,
• a valve seat arranged to face the valve body, and
• a compression spring arranged between the valve body and the valve seat to bias the valve body toward the open end of the suction pipe,
• the valve body including a first bottom portion, and a first circumferential wall extending toward the valve seat along a peripheral portion of the first bottom portion,
• the valve seat including a second bottom portion, and a second circumferential wall extending toward the valve body along a peripheral portion of the second bottom portion,
• an inside diameter d1 of an open end of the first circumferential wall and an outside diameter D2 of the second circumferential wall satisfying D2<d1,
• the suction passage extending along an axial direction of the suction pipe and being open to a surface of the fixed scroll that faces the movable scroll, and
• the valve seat being fitted into an opening of the suction passage to close the opening.