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US 12,753,760 B2Granted
Rotary compressor and refrigeration cycle device having the same
AssigneeLG Electronics Inc.
InventorsKiyoul Noh, Yunhi Lee, Seheon Choi
Life of this patent
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Abstract
Disclosed are a rotary compressor and a refrigeration cycle device having the same. The rotary compressor and the refrigeration cycle device having the same may include a casing, a main bearing, a sub bearing, a cylinder, a roller, a vane, and an injection passage, and the injection passage may be disposed in at least one selected from the main bearing, the sub bearing, and the cylinder to communicate with a corresponding compression chamber after a compression start angle of the corresponding compression chamber. Thus, a maximum injection section may be secured, while a refrigerant being injected may be suppressed from being leaked toward a suction port.
Claims16
A rotary compressor, comprising:
- a casing;
- a main bearing and a sub bearing each disposed in an inner space of the casing;
- a cylinder disposed between the main bearing and the sub bearing to define a compression space;
- a roller disposed on a rotational shaft to be rotatable in an inner space of the cylinder and eccentrically located with respect to a center of the compression space to have a contact point close to an inner circumferential surface of the cylinder;
- a plurality of vanes slidably inserted into a plurality of vane slots disposed in the roller, respectively, and configured to rotate together with the roller to divide the compression space into a plurality of compression chambers;
- and
- an injection passage configured to inject a part of refrigerant having been discharged from the compression space and condensed into the compression space, wherein the injection passage is disposed in at least one among the main bearing, the sub bearing, and the cylinder to communicate with a corresponding compression chamber among the plurality of compression chambers, after a compression start angle of the corresponding compression chamber, wherein the injection passage comprises an injection inlet recessed from an outer circumferential surface of the cylinder toward the inner circumferential surface of the cylinder by a preset depth, and at least one injection outlet in communication with the injection inlet to penetrate through the inner circumferential surface of the cylinder, wherein the at least one injection outlet comprises a plurality of injection outlets, and wherein the plurality of injection outlets is arranged to be spaced apart from each other by a preset distance in an axial direction, or wherein the injection passage comprises:
- a first injection passage disposed in one bearing among the main bearing and the sub bearing;
- a second injection passage disposed in another bearing among the main bearing and the sub bearing, wherein the first injection passage is not disposed in the another bearing;
- and
- an injection connection passage that connects the first injection passage to the second injection passage.
8 more elements
A refrigeration cycle device comprising a compressor, a condenser, an expander, and an evaporator, and having a rotary compressor applied to the refrigeration cycle device, wherein the compressor comprises:
- a casing;
- a main bearing and a sub bearing each disposed in an inner space of the casing;
- a cylinder disposed between the main bearing and the sub bearing to define a compression space;
- a roller disposed on a rotational shaft to be rotatable in the inner space of the cylinder and eccentrically located with respect to a center of the compression space to have a contact point close to an inner circumferential surface of the cylinder;
- a plurality of vanes slidably inserted into a plurality of vane slots disposed in the roller, respectively, and configured to rotate together with the roller to divide the compression space into a plurality of compression chambers;
- and
- an injection passage configured to inject a part of refrigerant having been discharged from the compression space and condensed into the compression space, wherein the injection passage is disposed in at least one among the main bearing, the sub bearing, and the cylinder to communicate with a corresponding compression chamber among the plurality of compression chambers, after a compression start angle of the corresponding compression chamber, wherein the injection passage comprises an injection inlet recessed from an outer circumferential surface of the cylinder toward the inner circumferential surface of the cylinder by a preset depth, and at least one injection outlet in communication with the injection inlet to penetrate through the inner circumferential surface of the cylinder, wherein the at least one injection outlet comprises a plurality of injection outlets, wherein the plurality of injection outlets is arranged to be spaced apart from each other by a preset distance in an axial direction, or wherein the injection passage comprises:
- a first injection passage disposed in one bearing among the main bearing and the sub bearing;
- a second injection passage disposed in another bearing among the main bearing and the sub bearing, wherein the first injection passage is not disposed in the another bearing;
- and
- an injection connection passage that connects the first injection passage to the second injection passage.
8 more elements
Dependencies are inferred from the claim text.