# US 2019/0170128 A1 · Precise control of suction damping device in a variable displacement compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170128 A1 - Document ID: US20190170128A1 - Status: Published application - Kind: A1 - Application number: 15/831,863 - Filed: 2017-12-05 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Hanon Systems - Applicants: Hanon Systems - Inventors: Kanwal Bhatia; Robert C. Trela; Teodor Urdea - Web page: https://patentgrep.com/patent/US20190170128A1 ## CPC - F04B 7/0046: {for rotating distribution members} - F04B 27/10: having stationary cylinders - F04B 7/0076: {the members being actuated by electro-magnetic means} - F04B 11/00: Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation - F04B 27/1009: {Distribution members} - F04B 27/1036: {Component parts, details, e.g. sealings, lubrication} - F04B 39/0038: {of inlet or outlet channels} - F04B 39/0055: {with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes} - F04B 39/08: Actuation of distribution members - F04B 49/125: {by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts (F04B49/128 takes precedence)} - F04B 2027/1813: {Crankcase pressure} - F04B 2027/1827: {between crankcase and discharge chamber} - F04B 2027/1877: {External parameters} - F04B 2027/1881: {Suction pressure} - 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 suction damping device for a variable displacement compressor includes a rotor rotatably received within a stator disposed in a suction port of the variable displacement compressor. The rotor includes an aperture and the stator includes a pair of opposing openings in selective fluid communication with the aperture of the rotor. An electromagnetic device controls a rotational position of the rotor relative to the stator based on a condition of an electrically controlled valve used to control an angle of inclination of a swashplate of the variable displacement compressor. A changing of the rotational position of the rotor relative to the stator causes a variable overlap to be formed between the aperture of the rotor and the openings of the stator to control a flow of a refrigerant through the suction damping device. ## Claims ### Claim 1 A suction damping device for a variable displacement compressor, the suction dampening device comprising: a rotor having a rotational axis, an aperture extending through the rotor in a direction transverse to the rotational axis, a selective rotation about the rotational axis of the rotor controlling a flow of a fluid through the aperture of the rotor. ### Claim 2 (depends on 1) The suction damping device of claim 1, further comprising a stator having an interior configured to rotatably receive the rotor therein, wherein at least one opening formed in the stator provides fluid access to the interior of the stator. ### Claim 3 (depends on 2) The suction damping device of claim 2, wherein the selective rotation of the rotor about the rotational axis varies an overlap present between the aperture of the rotor and the at least one opening of the stator. ### Claim 4 (depends on 1) The suction damping device of claim 1, further comprising an electromagnetic device selectively rotating the rotor about the rotational axis. ### Claim 5 (depends on 1) The suction damping device of claim 1, wherein the aperture of the rotor is an opening extending from a first side of the rotor to a second side of the rotor. ### Claim 6 (depends on 1) The suction damping device of claim 1, wherein the aperture of the rotor is an indentation formed in an outer surface of the rotor extending radially inwardly towards the rotational axis. ### Claim 7 A variable displacement compressor comprising: an electrically controlled valve configured to selectively control an angle of inclination of a swashplate of the variable displacement compressor; and a suction damping device including a rotor having a rotational axis, an aperture extending through the rotor in a direction transverse to the rotational axis, the rotor selectively rotated about the rotational axis based on a condition of the electrically controlled valve to control a flow of a fluid through the aperture of the rotor. ### Claim 8 (depends on 7) The variable displacement compressor of claim 7, wherein the condition of the electrically controlled valve is a value of a current energizing the electrically controlled valve. ### Claim 9 (depends on 8) The variable displacement compressor of claim 8, wherein a controller in signal communication with the suction damping device selectively rotates the rotor to change a flow area for the fluid to pass through the suction damping device based on the value of the current energizing the electrically controlled valve. ### Claim 10 (depends on 9) The variable displacement compressor of claim 9, wherein the controller includes information stored to a memory thereof for determining a rotational position of the rotor based on the value of the current energizing the electrically controlled valve. ### Claim 11 (depends on 9) The variable displacement compressor of claim 9, wherein an increase in the value of the current energizing the electrically controlled valve results in the controller rotating the rotor to a rotational position causing an increase in the flow area for the fluid to pass through the suction damping device and wherein a decrease in the value of the current energizing the electrically controlled valve results in the controller rotating the rotor to a rotational position causing a decrease in the flow area for the fluid to pass through the suction damping device. ### Claim 12 (depends on 7) The variable displacement compressor of claim 7, further comprising an electromagnetic device for selectively rotating the rotor about the rotational axis and a stator rotatably receiving the rotor, wherein the electromagnetic device includes a first electromagnetic component disposed within the rotor and the stator includes a second electromagnetic component disposed adjacent the first electromagnetic component. ### Claim 13 (depends on 7) The variable displacement compressor of claim 7, further comprising a stator having an interior rotatably receiving the rotor therein, wherein at least one opening formed in the stator provides fluid access to the interior of the stator, and wherein selective rotation of the rotor about the rotational axis varies an overlap present between the aperture of the rotor and the at least one opening of the stator to change a flow area for the fluid to pass through the suction damping device. ### Claim 14 (depends on 7) The variable displacement compressor of claim 7, wherein the suction damping device is disposed in a suction port of the variable displacement compressor and the rotational axis of the rotor is arranged transverse to a direction of flow of the fluid through the aperture of the rotor. ### Claim 15 A method of operating a suction dampening device of a variable displacement compressor, the method comprising: providing a suction damping device including a rotor having a rotational axis, an aperture extending through the rotor in a direction transverse to the rotational axis; and selectively rotating the rotor about the rotational axis thereof based on a condition of an electrically controlled valve of the variable displacement compressor to control a flow of a fluid through the suction damping device. ### Claim 16 (depends on 15) The method of claim 15, wherein the condition of the electrically controlled valve is a value of a current energizing the electrically controlled valve to position a swashplate of the variable displacement compressor at a desired angle of inclination. ### Claim 17 (depends on 16) The method of claim 16, wherein a controller in signal communication with the suction damping device selectively rotates the rotor to change a flow area for the fluid to pass through the suction damping device based on the value of the current energizing the electrically controlled valve. ### Claim 18 (depends on 17) The method of claim 17, wherein the controller includes information stored to a memory thereof for determining a rotational position of the rotor based on the value of the current energizing the electrically controlled valve. ### Claim 19 (depends on 15) The method of claim 15, wherein the suction damping device further includes a stator having an opening formed therein, wherein the selective rotation of the rotor about the rotational axis varies an overlap formed between the aperture of the rotor and the opening of the stator to control the flow of the fluid through the aperture of the rotor. ### Claim 20 (depends on 15) The method of claim 15, wherein the suction damping device further includes an electromagnetic device for selectively rotating the rotor about the rotational axis, wherein a controller in signal communication with the electromagnetic device determines the selective rotating of the rotor about the rotational axis based on the condition of the electrically controlled valve.