# US 9,518,680 B2 · Compressor and valve assembly thereof for reducing pulsation and/or noise > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,680 B2 - Document ID: US9518680B2 - Status: Granted - Kind: B2 - Application number: 14/167,425 - Filed: 2014-01-29 - Published: 2015-06-25 - Granted: 2016-12-13 - Earliest claimed: 2013-12-24 - Assignees: Dongbu Daewoo Electronics Corporation - Applicants: Dongbu Daewoo Electronics Corporation - Inventors: Won Woong Lee - Web page: https://patentgrep.com/patent/US9518680B2 ## CPC - F16K 47/08: for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths} - F04B 39/0055: {with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes} - F04B 39/0061: {using muffler volumes} - F04B 39/1066: {Valve plates} - F04B 39/1073: {the members being reed valves} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) ## Abstract A valve assembly may include a valve plate having an inlet hole through which working fluid passes from a vacuum muffler, a first discharge hole through which working fluid discharged from a cylinder passes, a second discharge hole through which the working fluid from the first discharge hole passes, and a pulsation and/or noise reducing passage through which the working fluid from the second discharge hole flows; a discharge valve at or in the valve plate configured to open and/or close the first discharge hole; a valve sheet having a first hole therein communicating with the first discharge hole and a second hole therein at an outlet of the pulsation and/or noise reducing passage; and a vacuum valve in the valve sheet configured to open and/or close the inlet hole. ## Claims ### Claim 1 A valve assembly, comprising: a valve plate having an inlet hole through which working fluid passes, a first discharge hole through which the working fluid passes, a second discharge hole through which the working fluid from the first discharge hole passes, and a passage extending to or surrounds at least a part of a periphery of the inlet hole, which the working fluid from the second discharge hole flows; a discharge valve at or in the valve plate configured to open and/or close the first discharge hole; a valve sheet having a first hole communicating with the first discharge hole and a second hole at an outlet of the passage; and a vacuum valve in the valve sheet configured to open and/or close the inlet hole of the valve plate. ### Claim 2 (depends on 1) The valve assembly of claim 1, further comprising: a discharge gasket in contact with the valve plate and having a first discharge gasket hole communicating with the inlet hole, and a second discharge gasket hole communicating with the first and the second discharge holes of the valve plate; and a vacuum gasket in contact with the valve sheet and having a first vacuum gasket hole communicating with the first hole and a second vacuum gasket hole communicating with the second hole. ### Claim 3 (depends on 2) The valve assembly of claim 2, wherein the passage is in one surface of the valve plate. ### Claim 4 (depends on 3) The valve assembly of claim 3, wherein the passage has a “U” or “C” shape, or a combination thereof with one or more other shapes. ### Claim 5 (depends on 2) The valve assembly of claim 2, wherein the passage is shielded or covered by the valve sheet, and an exit side of the passage communicates with the second hole. ### Claim 6 (depends on 1) The valve assembly of claim 1, further comprising a vacuum muffler that provides the working fluid to the valve plate. ### Claim 7 (depends on 1) The valve assembly of claim 1, further comprising a cylinder that provides the working fluid to the first discharge hole. ### Claim 8 (depends on 1) A compressor, comprising the valve assembly of claim 1. ### Claim 9 A compressor comprising: a vacuum muffler configured to supply working fluid; a cylinder block having a cylinder therein; a cylinder head coupled to the cylinder block to seal the cylinder, having a head groove through which the working fluid flows; a valve assembly between the cylinder block and the cylinder head, including a valve plate configured to control the flow of the working fluid therein; and a discharge muffler supplied with the working fluid from the valve assembly wherein the valve plate comprises an inlet hole through which working fluid passes from the vacuum muffler, a first discharge hole through which the working fluid from the cylinder passes, a second discharge hole through which the working fluid from the first discharge hole passes and a passage extending to or surrounds at least a part of a periphery of the inlet hole through which the working fluid from the second discharge hole flows. ### Claim 10 (depends on 9) The compressor of claim 9, wherein the passage is in one surface of the valve plate. ### Claim 11 (depends on 10) The compressor of claim 10, wherein the passage has a “U” shape or “C” shape, or a combination thereof with one or more other shapes. ### Claim 12 (depends on 9) The compressor of claim 9, wherein the valve assembly comprises: a discharge valve coupled to on in the valve plate configured to open and/or close the first discharge hole; a valve sheet having a first hole communicating with the first discharge hole and a second hole at an outlet of the passage; and a vacuum valve in the valve sheet configured to open and/or close the inlet hole. ### Claim 13 (depends on 9) The compressor of claim 9, wherein the valve assembly comprises: a discharge gasket between the cylinder head and the valve plate, having a first discharge gasket hole communicating with the inlet hole, and a second discharge gasket hole communicating with the first and the second discharge holes of the valve plate; and a vacuum gasket between the cylinder block and the valve sheet, having a first vacuum gasket hole communicating with the first hole and a second vacuum gasket hole communicating with the second hole. ### Claim 14 (depends on 9) A refrigerator, comprising the compressor of claim 9.