# US 10,502,209 B2 · Scroll compressor and air conditioning apparatus including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,209 B2 - Document ID: US10502209B2 - Status: Granted - Kind: B2 - Application number: 16/072,366 - Filed: 2017-01-24 - Published: 2019-01-31 - Granted: 2019-12-10 - Earliest claimed: 2016-01-26 - Assignees: Daikin Industries, Ltd. - Applicants: Daikin Industries, Ltd. - Inventors: Ryouta Nakai; Yasuhiro Murakami; Yasuo Mizushima; Masahiro Noro - Web page: https://patentgrep.com/patent/US10502209B2 ## CPC - F04C 18/0269: {Details concerning the involute wraps} - F01C 1/0215: {where only one member is moving} - F04C 18/02: of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents - F04C 18/0215: {where only one member is moving} - F04C 18/0246: {Details concerning the involute wraps or their base, e.g. geometry} - F04C 29/0028: {Internal leakage control} - F04C 29/025: {using a lubricant pump} - F04C 29/028: {Means for improving or restricting lubricant flow} - F04C 23/008: {Hermetic pumps} - F04C 2210/268: R32 - F04C 2230/602: Gap; Clearance - F04C 2240/30: Casings or housings - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) ## Abstract A scroll compressor includes a fixed scroll and a movable scroll. The fixed scroll has a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate. The movable scroll is orbitably disposed to face the fixed scroll. The movable scroll has a spiral movable-side wrap positioned upright on a surface of a movable-side plate, with the movable-side wrap being configured to mesh with the fixed-side wrap. A side clearance is formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps. ## Claims ### Claim 1 A scroll compressor, comprising: a fixed scroll having a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate; and a movable scroll orbitably disposed to face the fixed scroll, the movable scroll having a spiral movable-side wrap positioned upright on a surface of a movable-side plate, the movable-side wrap being configured to mesh with the fixed-side wrap, a side clearance being formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outermost peripheral side toward an innermost peripheral side of each of the wraps along the entire length of each of the wraps, the side clearance being a clearance formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap in a state where the side surface of the fixed-side wrap and the side surface of the movable-side wrap are located closest to each other. ### Claim 2 (depends on 1) The scroll compressor according to claim 1, wherein the increase in the side clearance is set such that the side clearance approaches a uniform state from the outer peripheral side to the inner peripheral side during an orbiting operation of the movable scroll. ### Claim 3 (depends on 1) The scroll compressor according to claim 1, wherein the increase in the side clearance is set such that an increase rate of the side clearance becomes larger from the outer peripheral side toward the inner peripheral side. ### Claim 4 (depends on 1) The scroll compressor according to claim 1, wherein the increase in the side clearance is obtained by decreasing a tooth thickness of at least one of the fixed-side wrap and the movable-side wrap from the outer peripheral side toward the inner peripheral side. ### Claim 5 (depends on 1) The scroll compressor according to claim 1, wherein a refrigerant containing R32 is compressed. ### Claim 6 (depends on 1) An air conditioning apparatus including the scroll compressor according to claim 1. ### Claim 7 (depends on 2) The scroll compressor according to claim 2, wherein the increase in the side clearance is set such that an increase rate of the side clearance becomes larger from the outer peripheral side toward the inner peripheral side. ### Claim 8 (depends on 2) The scroll compressor according to claim 2, wherein the increase in the side clearance is obtained by decreasing a tooth thickness of at least one of the fixed-side wrap and the movable-side wrap from the outer peripheral side toward the inner peripheral side. ### Claim 9 (depends on 2) The scroll compressor according to claim 2, wherein a refrigerant containing R32 is compressed. ### Claim 10 (depends on 2) An air conditioning apparatus including the scroll compressor according to claim 2. ### Claim 11 (depends on 3) The scroll compressor according to claim 3, wherein the increase in the side clearance is obtained by decreasing a tooth thickness of at least one of the fixed-side wrap and the movable-side wrap from the outer peripheral side toward the inner peripheral side. ### Claim 12 (depends on 3) The scroll compressor according to claim 3, wherein a refrigerant containing R32 is compressed. ### Claim 13 (depends on 3) An air conditioning apparatus including the scroll compressor according to claim 3. ### Claim 14 (depends on 4) The scroll compressor according to claim 4, wherein a refrigerant containing R32 is compressed. ### Claim 15 (depends on 4) An air conditioning apparatus including the scroll compressor according to claim 4. ### Claim 16 (depends on 5) An air conditioning apparatus including the scroll compressor according to claim 5.