Daikin Industries, Ltd.

Yasuhiro Murakami

Yasuo Mizushima

Ryouta Nakai

Hiroyuki Yamaji

Masahiro Noro

Satoshi Yamamoto

Mikio Kajiwara

Mitsuhiko Kishikawa

Mie Arai

Masahiro Yamada

Kazuhiko Matsukawa

Katsumi Katou

Kouji Tanaka

Nobuo Takahashi

Masanori Masuda

Kazuhiro Furusho

Hiroshi Kitaura

Takashi Hirouchi

Kouji Kojima

Akira Mori

Tomoko Mizuguchi

Eitarou Nakatani

Yuuki Matsumoto

Yuuta Okamura

A scroll compressor includes a fixed scroll and a movable scroll. A facing surface of the fixed scroll that faces the movable scroll has a fixed oil groove. The fixed oil groove has a fixed circumferential groove portion. The fixed circumferential groove portion has a circular-arc portion that extends in the circumferential direction, and a wide portion wider in a radial direction than a groove width of the circular-arc portion. A facing surface of the movable scroll that faces the fixed scroll has a movable oil groove. The movable oil groove has a movable circumferential groove portion, and a radial groove portion that communicates with the movable circumferential groove portion. In a predetermined region of an angle range where the movable scroll makes an orbiting motion, a portion of the radial groove portion overlaps the wide portion as viewed from an axial direction.

Scroll compressor and refrigeration device

A fixed scroll wrap () includes a fixed spiral portion () having a spiral shape and a fixed arcuate portion () having an arcuate shape. A movable scroll wrap () includes a movable spiral portion () having a spiral shape and a movable arcuate portion () having an arcuate shape. An arcuate portion side surface clearance (GA) is defined by the fixed arcuate portion () and one of the movable spiral portion () and the movable arcuate portion (), or is defined by the movable arcuate portion () and one of the fixed spiral portion () and the fixed arcuate portion (). A spiral portion side surface clearance (GI) is defined by the fixed spiral portion () and the movable spiral portion (). The arcuate portion side surface clearance (GA) is larger than the spiral portion side surface clearance (GI).

Scroll compressor having an arcuate portion side surface clearance larger than a spiral portion side surface clearance

A scroll compressor includes a fixed scroll, a movable scroll revolvable with respect to the fixed scroll, and a crankshaft rotatable to cause the movable scroll to revolve. A discharge port is formed in a first scroll of the fixed scroll or the movable scroll. A cutout portion is formed in a second scroll of the fixed scroll or the movable scroll. The cutout portion formed in the second scroll at least partially passes through a profile of the discharge port formed in the first scroll because of revolution of the movable scroll.

Scroll compressor having cutout provided on movable wrap to reduce backflow

A scroll compressor includes fixed and movable scrolls defining a compression chamber, and a crankshaft. The movable scroll at least partially covers a discharge port formed in the fixed scroll to change a communication area that is a portion of a total area of the discharge port that contributes to communication with the compression chamber. First to third rotation angle positions become larger in order. As the crankshaft rotates from the first to second rotation angle position the communication area increases at a first rate. In the first rotation angle position the compression chamber and the discharge port start communicating with each other. The second rotation angle position is a preliminary discharge interval angle. As the crankshaft rotates from the second to third rotation angle position the communication area increases at a second rate. The second rate of increase is greater than the first rate of increase.

Scroll compressor having offset portion provided on discharge port to reduce backflow

Provided is an efficient scroll compressor capable of suppressing deformation of a fixed scroll during operation. The scroll compressor includes: a fixed scroll () including a fixed-side end plate () and a spiral fixed-side wrap () protruding from a front surface () of the fixed-side end plate; a movable scroll () including a spiral movable-side wrap () combined with the fixed-side wrap to form a compression chamber (Sc); and a cover member () disposed in a high-pressure space on a rear surface () side of the fixed-side end plate and attached to the fixed scroll. The fixed-side end plate includes a compression chamber adjacent portion () at which the front surface of the fixed-side end plate faces the compression chamber. The compression chamber adjacent portion includes a high-pressure adjacent portion () disposed at a central portion of the compression chamber adjacent portion, and an intermediate- and low-pressure adjacent portion (). At the high-pressure adjacent portion, the front surface of the fixed-side end plate faces a high-pressure compression chamber. The intermediate- and low-pressure adjacent portion is disposed on the outer side of the high-pressure adjacent portion. The cover member defines a low- or intermediate-pressure rear surface adjacent space (S) that faces at least a part of a rear surface of the intermediate- and low-pressure adjacent portion in the compression chamber adjacent portion of the fixed-side end plate.

Scroll compressor with cover member defining rear surface adjacent space

A scroll compressor includes fixed and orbiting scrolls, and satisfies at least one of a first condition and a second condition. In the first condition, a first gap between a distal end of the first wrap and the second base changes heading from an outer peripheral side of the first wrap to an inner peripheral side. In the second condition, a second gap between a distal end of the second wrap and the first base changes heading from an outer peripheral side of the second wrap to an inner peripheral side. A rate of change in the first gap in one area is greater than a rate of change in the first gap in another area. A rate of change in the second gap in one area is greater than a rate of change in the second gap in another area.

Scroll compressor with non-uniform gap

A scroll compressor includes a fixed scroll including a fixed scroll lap, and a movable scroll including a movable scroll lap. A first scroll lap is one of the fixed scroll lap and the movable scroll lap. A second scroll lap is an other of the fixed scroll lap and the movable scroll lap. A second thickness of the second scroll lap is larger than a first thickness of the first scroll lap. A first side face gap is formed between an inner line of the first scroll lap and an outer line of the second scroll lap. A second side face gap is formed between an outer line of the first scroll lap and an inner line of the second scroll lap. The second side face gap is larger than the first side face gap.

Scroll compressor with different sized gaps formed between inner and outer peripheral surfaces of scroll laps

A scroll compressor includes a casing having a cylindrical barrel and lid, a compression mechanism having fixed and movable scrolls, and a suction passage that sends a fluid into a compression chamber. The fixed scroll includes a fixed-side end plate, a fixed-side wrap standing upright on the fixed-side end plate, and a suction hole. The suction hole is capable of communicating with the compression chamber. The suction passage includes an insertion pipe portion inserted into a through hole of the lid, and an in-plate passage formed in the fixed-side end plate and having an outflow opening opened toward the suction hole. A center of the through hole is closer to an axis of the barrel than a center of the outflow opening of the in-plate passage. An entirety of the suction passage is positioned radially outward of a portion, of the through hole, closest to the axis of the barrel.

Scroll compressor with suction pipe improvements

A compressor includes a crankshaft, an electric motor, a counterweight, and an oil outflow reduction member. The electric motor has a rotor coupled to the crankshaft and a stator in which the rotor is housed with an air gap formed between the stator and the rotor. The counterweight is disposed adjacent to the rotor and is integrated with the crankshaft. The oil outflow reduction member encloses an upper side, a lower side, and a lateral side of a counterweight passing space. The counterweight passing space is a space through which at least part of the counterweight passes when the crankshaft rotates 360&#xb0;.

Compressor

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.

Scroll compressor and air conditioning apparatus including the same

A scroll compressor includes a compression mechanism having fixed and movable scrolls to form a fluid chamber. The fixed scroll has an end plate, an outer peripheral wall, and a wrap. The movable scroll has an end plate and a wrap. A scroll oil groove is formed in a sliding contact surface of the outer peripheral wall. Lubricating oil having a high pressure corresponding to a discharge pressure of the compression mechanism is fed into the scroll oil groove. A scroll oil groove is formed in a sliding contact surface of the movable scroll, which slides on the outer peripheral wall. The fixed and movable scroll oil grooves communicate with each other without communicating with the fluid chamber in a first operation. The movable scroll oil groove simultaneously communicates with the fixed scroll oil groove and the fluid chamber in a second operation after the first operation.

Scroll-type compressor with oil grooves on scroll sliding surfaces

A compressor includes a housing member having an injection passage communicating with a compression chamber, a check valve in the injection passage, and an injection pipe that supplies refrigerant to the injection passage. The check valve has a slidable valve body, and a valve supporting member that restricts movement of the valve body toward the injection pipe side when the check valve checks a flow of refrigerant. A center hole is formed in the valve body. A peripheral hole is formed in the valve supporting member and opposes a rim part of the valve body. Refrigerant passes through the peripheral and center holes and is supplied to the compression chamber. The center hole can be closed by the valve supporting member, and the peripheral hole can be closed by the rim part of the valve body when the check valve checks the flow of refrigerant.

Compressor having a check valve in the injection passage

A scroll compressor includes fixed and movable scrolls having a fixed and movable side plates and fixed and movable side laps to form first and second compression chambers. The fixed-side plate includes a discharge port and a relief hole extending from the front face through to the back face. The relief hole communicates for a predetermined amount of time with each of the first and second compression chambers and is shared by the first and second compression chambers. The front face of the movable-side plate includes a recessed part allowing the second compression chamber and the discharge port to communicate. The second compression chamber, during a latter stage of compression, and the discharge port communicating via a gap formed between a tip of the fixed-side lap and the recessed part before communicating via a side face gap formed between the fixed-side lap and the movable-side lap.

Scroll compressor having compression chamber communicating with discharge port via a gap between recessed part formed on front face of movable-side plate and tip of fixed-side lap

A scroll compressor includes fixed and movable scrolls, each scroll having a spiral lap placed on one surface of a plate. The lap of the fixed scroll and the lap of the movable scroll are interlocked to form a compression chamber between the laps of the scrolls which are adjacent to each other. At least one of the laps has a spiral shape in which a base radius of an involute decreases as a winding angle increases in a region extending from a winding start part to a winding middle part, and the base radius of the involute in a region extending from the winding middle part to a winding end part is larger than the smallest value of the base radius of the involute in the region extending from the winding start part to the winding middle part.

Scroll compressor

A rotary machine includes a rotor, a rotating shaft fixed to the rotor, and a balance weight fixed to the rotor. The balance weight has a balance part fixed to the rotor and not contacting the shaft, a locking part, a shaft abutting part, and a coupling part coupling the balance part and the shaft-abutting part, The locking part is disposed on a side of the shaft opposite from the balance part. The locking part is locked with the shaft to limit movement of the balance part along a direction of centrifugal force. The shaft-abutting part is positioned between the shaft and the balance part, is coupled with the locking part, and contacts the shaft. A length of the locking part along a rotor radial direction is shorter than a rotor radial distance between the shaft and the balance part. The shaft-abutting part is radially shorter than the locking part.

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Sakai, Japan

Yasuhiro Murakami