# US 2021/0277892 A1 · Compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277892 A1 - Document ID: US20210277892A1 - Status: Published application - Kind: A1 - Application number: 17/185,392 - Filed: 2021-02-25 - Published: 2021-09-09 - Earliest claimed: 2020-03-06 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Taekyoung KIM; Kangwook LEE; Nayoung JEON - Web page: https://patentgrep.com/patent/US20210277892A1 ## CPC - F04C 18/0215: {where only one member is moving} - F04C 2/025: {the moving and the stationary member having co-operating elements in spiral form} - F04C 23/008: {Hermetic pumps} - F04C 29/02: Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D) - F04C 29/028: {Means for improving or restricting lubricant flow} - F04C 29/04: Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L59/00) - F04C 29/065: {Noise dampening volumes, e.g. muffler chambers} - F04C 2240/30: Casings or housings - F04C 2240/60: Shafts - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A compressor includes a casing that defines an oil storage space and an opening that discharges refrigerant to an outside of the casing, a rotatable shaft disposed in the casing, a driver coupled to an inner circumferential surface of the casing and configured to rotate the rotatable shaft, a compression assembly coupled to the rotatable shaft and configured to compress and discharge the refrigerant to an inside of the casing, a muffler coupled to the compression assembly and configured to guide the refrigerant discharged from the compression assembly toward the opening, where the muffler being is configured to exchange heat with the refrigerant, and a heat radiating member that is coupled to the muffler and extends to the oil storage space and contacts the oil in the oil storage space. The muffler is configured to exchange heat with the oil through the heat radiating member. ## Claims ### Claim 1 A compressor comprising: a casing that defines an oil storage space configured to receive oil therein, the casing having an opening configured to discharge refrigerant to an outside of the casing; a rotatable shaft disposed in the casing; a driver coupled to an inner circumferential surface of the casing and configured to rotate the rotatable shaft; a compression assembly coupled to the rotatable shaft and configured to compress and discharge the refrigerant to an inside of the casing; a muffler coupled to the compression assembly and configured to guide the refrigerant discharged from the compression assembly toward the opening, the muffler being configured to exchange heat with the refrigerant; and a heat radiating member coupled to the muffler, the heat radiating member extending to the oil storage space and contacting the oil in the oil storage space, wherein the muffler is configured to exchange heat with the oil through the heat radiating member. ### Claim 2 (depends on 1) The compressor of claim 1, wherein the heat radiating member comprises: a contact portion that is in contact with the muffler; and a heat radiating portion that extends from the contact portion to the oil storage space and contacts the oil in the oil storage space. ### Claim 3 (depends on 2) The compressor of claim 2, wherein the heat radiating member further comprises a fastener that couples the contact portion to the muffler. ### Claim 4 (depends on 3) The compressor of claim 3, wherein the muffler defines a muffler shaft receiving portion through which the rotatable shaft passes, and wherein a distance between the heat radiating portion and the muffler shaft receiving portion is less than a distance between the muffler shaft receiving portion and the fastener. ### Claim 5 (depends on 4) The compressor of claim 4, wherein the heat radiating portion has a tapered shape that extends toward the oil storage space and has a distal end located in the oil storage space. ### Claim 6 (depends on 4) The compressor of claim 4, wherein the contact portion defines a first area in contact with the muffler and a second area connected to the heat radiating portion, wherein the second area is smaller than the first area. ### Claim 7 (depends on 4) The compressor of claim 4, wherein the contact portion extends in a radial direction of the rotatable shaft, the contact portion having: a first end that is located away from the muffler shaft receiving portion in the radial direction of the rotatable shaft; and a second end that faces the muffler shaft receiving portion in the radial direction of the rotatable shaft, and wherein the heat radiating portion extends from the second end to the oil storage space. ### Claim 8 (depends on 2) The compressor of claim 2, wherein the heat radiating portion extends parallel to a longitudinal direction of the rotatable shaft. ### Claim 9 (depends on 2) The compressor of claim 2, wherein the heat radiating member is made of aluminum. ### Claim 10 (depends on 2) The compressor of claim 2, wherein the muffler defines a muffler shaft receiving portion through which the rotatable shaft passes, and wherein the heat radiating portion comprises: a first heat radiating portion that is spaced apart from the muffler shaft receiving portion by a first spacing, the first heat radiating portion surrounding at least a portion of the muffler shaft receiving portion; and a second heat radiating portion that surrounds at least a portion of the muffler shaft receiving portion, the second heat radiating portion being spaced apart from the muffler shaft receiving portion by a second spacing that is larger than the first spacing. ### Claim 11 (depends on 10) The compressor of claim 10, wherein a first extension length of the first heat radiating portion toward the oil storage space is greater than a second extension of the second heat radiating portion toward the oil storage space. ### Claim 12 (depends on 10) The compressor of claim 10, wherein the heat radiating portion defines at least one communication opening configured to communicate an outside of the heat radiating portion and an inside of the heat radiating portion with each other. ### Claim 13 (depends on 10) The compressor of claim 10, wherein the first heat radiating portion defines a first communication opening configured to communicate an inside of the first heat radiating portion and an outside of the first heat radiating portion with each other, and wherein the second heat radiating portion defines a second communication opening configured to communicate an inside of the second heat radiating portion and an outside of the second heat radiating portion with each other. ### Claim 14 (depends on 13) The compressor of claim 13, wherein the first communication opening and the second communication opening face each other. ### Claim 15 (depends on 13) The compressor of claim 13, wherein the first communication opening faces the second heat radiating portion, and the second communication opening faces the first heat radiating portion. ### Claim 16 (depends on 10) The compressor of claim 10, wherein the contact portion comprises: a first contact portion in contact with the first heat radiating portion; a second contact portion in contact with the second heat radiating portion; and a third contact portion that extends between the first contact portion and the second contact portion. ### Claim 17 (depends on 16) The compressor of claim 16, wherein the contact portion further comprises a fourth contact portion that extends radially outward from the second contact portion. ### Claim 18 (depends on 10) The compressor of claim 10, wherein the second heat radiating portion surrounds at least a portion of the first heat radiating portion. ### Claim 19 (depends on 10) The compressor of claim 10, wherein the first heat radiating portion comprises a pair of first heat radiating portions that are spaced apart from each other in a circumferential direction and arranged outside the muffler shaft receiving portion in a radial direction, and wherein the second heat radiating portion comprises a pair of second heat radiating portions that are spaced apart from each other in the circumferential direction and arranged outside the pair of first heat radiating portions in the radial direction. ### Claim 20 (depends on 1) The compressor of claim 1, wherein the driver comprises a rotor coupled to the rotatable shaft and a stator coupled to the inner circumferential surface of the casing, wherein the compression assembly comprises a fixed scroll and an orbiting scroll, the orbiting scroll being configured to rotate relative to the fixed scroll, and wherein the driver and the compression assembly are arranged between the opening of the case and the oil storage space along the rotatable shaft.