Daikin Industries, Ltd.

Ryouta Nakai

Yasuhiro Murakami

Yasuo Mizushima

Masahiro Noro

Yoshitomo Tsuka

Satoshi Tsukamoto

Yoshihiro Kataoka

Katsumi Katou

Yasuhiko Ohsawa

A stator includes a stator core having a plurality of teeth, an insulator, a plurality of coils, a first region in which distal ends of feeder lines are connected to each other, and a second region in which distal ends of neutral lines are connected to each other. The insulator has inner and outer walls spaced from each other in a radial direction. In a cross section at a gap between two adjacent coils, along a plane including an axis of the stator core, a center of gravity of the first region is positioned above a center of gravity of the second region in an axial direction. B&#x3c;A and C&#x3c;A, where a radial length of the first region is B, a radial length of the second region is C, and a radial length between the inner wall and the outer wall of the insulator is A.

Stator, motor, and compressor

A scroll compressor includes a scroll compression mechanism, a motor, and a casing. The motor includes a stator having a stator core and an insulator, a rotor disposed inside the stator, a coil wound around a plurality of teeth of the stator core via the insulator, and an outgoing line at an end of the coil. When the motor is viewed along a rotation axis of the rotor, at least one of the outgoing line and a film wound around the outgoing line satisfies 0.65&#x3c;(D&#x2212;da)/(D&#x2212;D)&#x3c;0.95. An outer radius of the teeth centered on a position of the rotation axis of the rotor is D. An inner radius of the teeth is D. An average distance from the position of the rotation axis of the rotor to the at least one of the outgoing line and the film wound around the outgoing line is da.

Scroll compressor

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 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.

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Osaka, Japan

Ryouta Nakai