JP2021076066A - Rotary compressor - Google Patents

Abstract

To provide a rotary compressor capable of further smoothly operating while suppressing noise.SOLUTION: A rotary compressor comprises: a crank shaft rotating about an axis; and a compressing portion formed with a compression chamber. The compressing portion has: a piston rotor provided on the crank shaft and swiveling at a position eccentric from the axis; a cylinder covering the piston rotor from an outer peripheral side; an upper bearing and a lower bearing covering the cylinder from the axis direction to form a compression chamber; a blade disposed in the compression chamber, abutting on an outer peripheral surface of the piston rotor at a tip end, and separating the compression chamber into a low-pressure space and a high-pressure space; and an elastic member energizing the blade in a direction including an ingredient of a diametrical direction. In the cylinder, a blade storage portion storing the blade, and an elastic member storage portion are formed. On a part which is on an end surface on the low-pressure space side in the blade storage portion and includes an end edge on the inner side in the diametrical direction, a first connection surface extending toward the low-pressure space side as it goes from the outer side in the diametrical direction toward the inner side.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a rotary compressor.

For example, a rotary compressor is known as a device used for compressing a refrigerant in an air conditioner. The rotary compressor includes a shaft, a piston rotor mounted on the eccentric portion of the shaft, a cylinder having a cylinder chamber for accommodating the piston rotor, and upper bearings and lower bearings arranged on both axial sides of the cylinder chamber. It includes a blade that projects toward the cylinder chamber and a housing that houses them. The blade normally slides into contact with the outer peripheral surface of the piston rotor to divide the cylinder chamber into a low-pressure space and a high-pressure space (see Patent Document 1 below). The blade is housed in a housing portion that is recessed from the inner peripheral surface of the cylinder toward the outside in the radial direction, and an elastic member (spring) that urges the blade in the radial direction at the end portion on the outer side in the radial direction. ) Is provided.

Japanese Unexamined Patent Publication No. 2012-137008

By the way, it is known that a phenomenon called jump occurs in a blade as described above. The jump is a phenomenon in which the blade cannot keep up with the movement of the piston rotor due to the inertial force generated based on the weight of the blade itself, and the two repeatedly contact and separate from each other. This phenomenon is also caused by an excessive frictional resistance between the blade and the inner wall of the accommodating portion. That is, the blade is caught on the inner wall of the accommodating portion, which hinders the smooth operation of the blade. There is a problem that noise is generated from the rotary compressor by such a jump.

The present disclosure has been made in order to solve the above problems, and an object of the present disclosure is to provide a rotary compressor capable of operating more smoothly while suppressing noise.

In order to solve the above problems, the rotary compressor according to the present disclosure includes a crankshaft that can rotate around an axis and a crankshaft.
A compression unit in which a compression chamber for compressing the refrigerant with the rotation of the crankshaft is formed, and
With
The compression unit is
A piston rotor provided on the crankshaft that swivels around the axis at a position eccentric from the axis, an annular cylinder that covers the piston rotor from the outer peripheral side, and a cylinder that covers the cylinder from the axis direction, respectively. The upper bearing and the lower bearing forming the compression chamber together with the cylinder, and the lower bearing, which are arranged in the compression chamber and are movable in a direction containing the radial component in a state where the tip is in contact with the outer peripheral surface of the piston rotor. The cylinder has a blade that separates the compression chamber into a low-pressure space and a high-pressure space, and an elastic member that urges the blade in a direction containing the radial component. A blade accommodating portion extending in the radial direction from the peripheral surface and accommodating the blade so as to be movable, and an elastic member accommodating portion accommodating the elastic member by communicating with the radial outside of the blade accommodating portion are formed. On the end surface of the accommodating portion on the low pressure space side, the portion including the radial inner end edge has a first connecting surface extending toward the low pressure space side from the radial outer side to the inner side. It is formed.

According to the rotary compressor of the present disclosure, it is possible to operate more smoothly while suppressing noise.

It is a vertical sectional view of the rotary compressor which concerns on 1st Embodiment of this disclosure. It is sectional drawing which shows the structure of the piston rotor and the blade which concerns on 1st Embodiment of this disclosure. It is sectional drawing which shows the structure of the blade which concerns on 1st Embodiment of this disclosure. It is sectional drawing which shows the structure of the blade which concerns on 2nd Embodiment of this disclosure. It is sectional drawing which shows the structure of the blade which concerns on 3rd Embodiment of this disclosure.

<First Embodiment>
(Rotary compressor configuration)
Hereinafter, the rotary compressor 100 according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the rotary compressor 100 according to the present embodiment includes a compressor main body 10, an accumulator 24, and suction pipes 26A and 26B. The compressor body 10 includes a crankshaft 16 extending along the axis O, a motor 18 for rotating the crankshaft 16, a compression unit 10A for compressing a refrigerant as the crankshaft 16 rotates, a crankshaft 16, and a motor 18. , And a housing 11 that covers the compression portion 10A.

The crankshaft 16 has a columnar shape centered on the axis O. The motor 18 rotationally drives the crankshaft 16 around the axis O. The rotation of the crankshaft 16 drives the compression unit 10A. The compression unit 10A is the piston rotors 13A and 13B (first piston rotor 13A, second) that rotate (rotate) around the axis O at positions eccentric from the axis O (rotor axis O1 and O2) as the crankshaft 16 rotates. Piston rotor 13B), cylinders 12A and 12B that accommodate these first piston rotor 13A and second piston rotor 13B, respectively, upper bearing 17A that rotatably supports the crankshaft 16, lower bearing 17B, and cylinder 12A. , A blade B that separates the compression chamber C formed in the 12B into two spaces, and an elastic member G that urges the blade B in the radial direction.

(Compression section configuration)
The compression unit 10A is a so-called two-cylinder type rotary compressor in which disk-shaped cylinders 12A and 12B are provided in two upper and lower stages in a cylindrical housing 11. The housing 11 surrounds the cylinders 12A and 12B to form a discharge space V from which the compressed refrigerant is discharged. Inside the cylinders 12A and 12B, a cylindrical first piston rotor 13A and a second piston rotor 13B having an outer shape smaller than the inside of the inner wall surface of the cylinder are arranged, respectively. The first piston rotor 13A and the second piston rotor 13B are inserted and fixed to the crankshafts 14A and 14B (first crankshaft 14A, second crankshaft 14B) of the crankshaft 16, respectively.

The first piston rotor 13A of the cylinder 12A on the upper stage side and the second piston rotor 13B on the lower stage side are provided so that their phases differ from each other by 180 °. That is, the first piston rotor 13A is eccentric in the direction opposite to the eccentric direction of the second piston rotor 13B. Further, a disk-shaped partition plate 15 is provided between the upper and lower cylinders 12A and 12B. The space R in the cylinder 12A on the upper stage side and the space R on the lower stage side are partitioned from each other by the partition plate 15 to form compression chambers C1 and C2, respectively.

The cylinders 12A and 12B are fixed to the housing 11 by the upper bearing 17A and the lower bearing 17B. More specifically, the upper bearing 17A has a disk shape fixed to the upper part of the compression portion 10A, and its outer peripheral surface is fixed to the inner peripheral surface of the housing 11. The lower bearing 17B has a disk shape fixed to the lower part of the compression portion 10A, and its outer peripheral surface is fixed to the inner peripheral surface of the housing 11. The upper bearing 17A covers the cylinder 12A on the upper stage side from above (one side in the axis O direction). Further, the lower bearing 17B covers the cylinder 12B on the lower stage side from below (the other side in the axis O direction). That is, the upper bearing 17A forms the above-mentioned compression chamber C1 together with the cylinder 12A and the partition plate 15, and the lower bearing 17B forms the above-mentioned compression chamber C2 together with the cylinder 12B and the partition plate 15. The rotary compressor 100 may have one cylinder instead of such two cylinders. In the case of one cylinder, the upper bearing 17A and the lower bearing 17B cover both sides of the cylinder in the O-direction without providing the partition plate 15.

In the compressor main body 10, an accumulator 24 for gas-liquid separation of the refrigerant prior to supply to the compressor main body 10 is fixed to the housing 11 via a stay 25. Suction pipes 26A and 26B for sucking the refrigerant in the accumulator 24 into the compressor main body 10 are provided between the accumulator 24 and the compressor main body 10. One end of the suction pipes 26A and 26B is connected to the lower part of the accumulator 24, and the other end communicates with the suction ports 23A and 23B formed in the cylinders 12A and 12B through the openings 22A and 22B, respectively. A rotor 19A of a motor 18 for rotationally driving the crankshaft 16 is integrally provided on one end side of the crankshaft 16. The stator 19B is fixedly provided on the inner peripheral surface of the housing 11 so as to face the outer peripheral portion of the rotor 19A.

Subsequently, the internal configuration of the compression unit 10A will be described with reference to FIG. Since the upper cylinder 12A and the lower cylinder 12B have the same configuration as each other, only the upper cylinder 12A will be described below as a representative. As shown in FIG. 2, the cylinder 12A has an annular cylinder body 12H centered on the axis O and two overhanging portions P1 and P2 provided on the outer peripheral surface 12S of the cylinder body 12H. There is. The overhanging portions P1 and P2 extend in a fan shape from the outer peripheral surface 12S toward the outer side in the radial direction with respect to the axis O. The outer peripheral surfaces of the overhanging portions P1 and P2 are brought into contact with and fixed to the inner peripheral surface of the housing 11 by, for example, shrink fitting. The two overhanging portions P1 and P2 are provided at intervals in the circumferential direction with respect to the axis O. Further, the overhanging portion P1 has a larger dimension in the circumferential direction than the overhanging portion P2. The number and shape of these overhanging portions P1 and P2 may be appropriately determined according to the design and specifications.

The inner peripheral side of the cylinder body 12H is formed as the above-mentioned compression chamber C1 by opening in a circular shape about the axis O. The first piston rotor 13A is housed in the compression chamber C1. The blade B is supported in the blade accommodating portion Sb in a state of being urged by the elastic member G with respect to the cylinder body 12H. Specifically, the elastic member G is connected to the radial outer end portion (base end Bb) of the blade B. The blade B is urged inward in the radial direction with respect to the axis O by the elastic member G. As a result, the tip Bt of the blade B is in a state of being in normal contact with the outer peripheral surface of the first piston rotor 13A.

(Structure of blade and blade housing)
The blade B is movable (movable) in the radial direction with respect to the axis O. The compression chamber C1 is separated into two spaces (high pressure space Vh and low pressure space Vl) by the blade B. More specifically, when the rotation direction R (swivel direction) of the first piston rotor 13A is used as a reference, the space on the front side of the rotation direction R with respect to the blade B is the high pressure space Vh, and the space on the rear side in the rotation direction is It is a low pressure space Vl. In the high-pressure space Vh, the refrigerant sent from the low-pressure space Vl side is compressed and distributed at a high temperature and high pressure. This high-temperature and high-pressure refrigerant is taken out from a discharge port (not shown) formed in the cylinder body 12H via a discharge space V in the housing 11.

As shown in FIG. 3, the blade B has a plate shape in which the radial direction with respect to the axis O is the longitudinal direction and the circumferential direction is the thickness direction when viewed from the axis O direction. In the cylinder 12A on the upper stage side, the pair of surfaces of the blade B facing the axis O direction are the axial sliding surfaces Bs and Bs that slide on the upper bearing 17A and the partition plate 15, respectively. The surface connecting these axial sliding surfaces Bs and Bs in the axial direction O direction is defined as the blade outer surface Bo. The portion of the blade Bo facing inward in the radial direction has a curved surface shape that is convex inward in the radial direction when viewed from the axis O direction. Further, the blade B is integrally formed of a single metal material selected from iron and aluminum.

The blade accommodating portion Sb is a groove recessed in the radial direction from the inner peripheral surface (cylinder inner peripheral surface 12T) of the cylinder 12A (or the cylinder 12B). The radial outer end of the blade accommodating portion Sb communicates with the elastic member accommodating portion Sg. The elastic member accommodating portion Sg has a circular shape when viewed from the axis O direction. The blade accommodating portion Sb includes a front surface A1 and a first connection surface A1c forming an inner wall on the low pressure space Vl side with reference to the radial direction, a rear surface A2 forming an inner wall on the high pressure space Vh side, and a second connection surface A2c. ,have. Both the front surface A1 and the rear surface A2 extend in the radial direction. The front surface A1 faces the rear surface A2 at a distance in the circumferential direction. In other words, the front surface A1 and the rear surface A2 are parallel to each other when viewed from the axis O direction.

The cylinder inner peripheral surface 12T and the front surface A1 are connected by a first connecting surface A1c. That is, the first connection surface A1c is on the end surface (inner wall) on the low pressure space Vl side of the blade accommodating portion Sb, and forms a portion including the inner edge in the radial direction. The first connection surface A1c extends from the outer side in the radial direction toward the inner side toward the low pressure space Vl side. That is, the first connection surface A1c extends in a direction inclined with respect to the radial direction.

The inner wall of the elastic member accommodating portion Sg and the rear surface A2 are connected by a second connecting surface A2c. That is, the second connection surface A2c is on the end surface (inner wall) on the high-pressure space Vh side of the blade accommodating portion Sb, and forms a portion including the outer edge in the radial direction. The second connecting surface A2c extends toward the high pressure space Vh side from the inside to the outside in the radial direction. That is, the second connecting surface A2c extends in a direction inclined with respect to the radial direction. Further, the second connection surface A2c is parallel to the first connection surface A1c described above.

(Action effect)
Next, the operation of the rotary compressor 100 according to the present embodiment will be described. When operating the rotary compressor 100, the motor 18 is first driven by an external power supply. As the motor 18 is driven, the crankshaft 16 rotates around the axis O. As the crankshaft 16 rotates, the first crankshaft 14A and the second crankshaft 14B rotate around the central axis (axis O) of the crankshaft 16. The first piston rotor 13A and the second piston rotor 13B rotate eccentrically in the compression chambers C1 and C2 so as to follow this turning. The eccentric rotation of the first piston rotor 13A and the second piston rotor 13B changes the volumes of the compression chambers C1 and C2, and the refrigerant taken into the compression chambers C1 and C2 is compressed. The compressed refrigerant is taken out to the outside through the discharge space V in the housing 11.

Here, during the operation of the rotary compressor 100, the radial inside of the blade accommodating portion Sb is caused by the pressure difference between the high-pressure space Vh and the low-pressure space Vl and the turning of the first piston rotor 13A and the second piston rotor 13B. A moment from the high-pressure space Vh side to the low-pressure space Vl side is applied to the blade B with the edge of the blade as a fulcrum. As a result, the blade B is pressed against the inner wall of the blade accommodating portion Sb (that is, the portion of the blade accommodating portion Sb on the low pressure space Vl side end surface including the radial inner end edge). .. That is, the posture of the blade B changes in the direction toward the low pressure space Vl side from the outer side in the radial direction to the inner side. In other words, the blade B changes its posture in the direction including the radial component, and moves forward and backward in that direction.

As a result, the frictional resistance between the blade B and the inner wall of the blade accommodating portion Sb becomes excessive, and the blade B may be caught on the inner wall of the blade accommodating portion Sb. As a result, the blade B may not be able to follow the operation of the first piston rotor 13A or the second piston rotor 13B, and a phenomenon (jump) may occur in which the blades repeatedly contact and separate from each other.

However, in the above configuration, the first connection surface A1c and the second connection surface A2c are formed at the portion of the blade accommodating portion Sb where the blade B is pressed. The first connection surface A1c extends from the outer side in the radial direction toward the inner side toward the low pressure space Vl side. The second connecting surface A2c extends toward the high pressure space Vh side from the inside to the outside in the radial direction. That is, the first connecting surface A1c and the second connecting surface A2c expand in the direction along the posture when the posture of the blade B changes as described above. Therefore, for example, the frictional resistance generated between the blade B and the blade accommodating portion Sb can be reduced as compared with the configuration in which the blade accommodating portion Sb simply extends in the radial direction. As a result, the blade B can be made to follow more smoothly as the piston rotor turns. As a result, the rotary compressor 100 can be operated more stably.

<Second embodiment>
Next, the second embodiment of the present disclosure will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 4, in the present embodiment, the posture of the blade B2 is different from that of the first embodiment. In the first embodiment, the blade B extends in the radial direction, while the blade B2 according to the present embodiment extends in the inclined direction toward the low pressure space Vl side from the outer side in the radial direction to the inner side. .. The blade B2 is movable in this inclination direction, and the elastic member G2 is configured to urge the blade B2 in the inclination direction.

According to the above configuration, the blade B2 extends in the inclined direction toward the low pressure space Vl side in advance from the outer side to the inner side in the radial direction. Further, the elastic member G2 urges the blade B2 in the inclination direction. Therefore, the frictional resistance generated between the blade B2 and the blade accommodating portion Sb when the pressure difference between the high pressure space Vh and the low pressure space Vl and the moment associated with the rotation of the piston rotors 13A and 13B are applied to the blade B2. Can be further reduced.

<Third Embodiment>
Subsequently, the third embodiment of the present disclosure will be described with reference to FIG. The same components as those in the above embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 5, in the present embodiment, the configuration of the blade B3 is different from each of the above-described embodiments. The blade B3 has a first resin portion Bp1, a first metal portion Bm1, a second resin portion Bp2, and a second metal portion Bm2. The first resin portion Bp1 forms a portion of the blade B3 that abuts (contacts) the first connection surface Ac1. Specifically, the first resin portion Bp1 forms a part of the low pressure space Vl side of the blade B3 with reference to the radial direction. The portion radially inside the first resin portion Bp1, that is, the portion that abuts (contacts) with the front surface A1, is referred to as the second metal portion Bm2.

The second resin portion Bp2 forms a portion of the blade B3 that abuts (contacts) the second connection surface Ac2. Specifically, the second resin portion Bp2 forms a part of the high-pressure space Vh side of the blade B3 with reference to the radial direction. The portion radially outside the second resin portion Bp2, that is, the portion that abuts (contacts) with the rear surface A2 is referred to as the first metal portion Bm1.

The first resin portion Bp1 and the second resin portion Bp2 are formed of a resin material. Specific examples of such resin materials include polyoxymethylene (POM), polyamide (PA), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and polytetrafluoroethylene (PTFE). Polyetheretherketone (PEEK) and polyimide (PI) can be mentioned.

According to the above configuration, for example, the blade B3 (first resin portion Bp1), the first connection surface Ac1, and the blade B3 (second resin portion Bp2) are compared with the configuration in which the blade B3 is integrally formed of a metal material. The frictional resistance generated between the surface and the second connection surface Ac2 can be further reduced. As a result, the rotary compressor 100 can be operated more stably.

Although each embodiment of the present disclosure has been described in detail above, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range that does not deviate from the gist of the present disclosure. For example, in each of the above embodiments, an example in which the tip Bt of the blade B has a curved surface shape that is convex inward in the radial direction when viewed from the axis O direction has been described. However, the shape of the tip Bt is not limited to the above, and can be appropriately changed to another shape according to the design and specifications. Other shapes include polygonal shapes and rectangular shapes. Further, as a measure for further reducing the weight of the blade B, it is possible to form a plurality of through holes in the resin portion Bp that penetrate the resin portion Bp in the axis O direction.

<Additional notes>
The rotary compressor 100 described in each embodiment is grasped as follows, for example.

(1) The rotary compressor 100 according to the first aspect includes a crankshaft 16 that can rotate around an axis, and a compression unit 10A in which a compression chamber C that compresses the refrigerant as the crankshaft 16 rotates is formed. The compression unit 10A is provided on the crankshaft 16 and rotates around the axis O at a position eccentric from the axis O. The piston rotors 13A and 13B and the piston rotors 13A and 13B are moved from the outer peripheral side. An upper bearing 17A and a lower bearing 17B that form the compression chamber C together with the cylinders 12A and 12B by covering the covering annular cylinders 12A and 12B and the cylinders 12A and 12B from the axis O direction, respectively, and the above. It is arranged in the compression chamber C, and the tip Bt is movable in a direction including the radial component in a state where the tip Bt is in contact with the outer peripheral surfaces of the piston rotors 13A and 13B, and the compression chamber C is moved to a low pressure space Vl and a high pressure. The cylinders 12A and 12B have a blade B separated into a space Vh and an elastic member G for urging the blade B in a direction containing the radial component, and the cylinders 12A and 12B are included in the cylinders 12A and 12B. An elastic member accommodating portion Sb extending in the radial direction from the peripheral surface 12S and communicating with the radial outer side of the blade accommodating portion Sb for movably accommodating the blade B and the elastic member accommodating portion Sg accommodating the elastic member G. Is formed, and on the end surface of the blade accommodating portion Sb on the low pressure space Vl side, the portion including the radial inner edge is on the low pressure space Vl side from the radial outer side to the inner side. A first connecting surface A1c extending toward is formed.

Here, during the operation of the rotary compressor 100, the radial inner edge of the blade accommodating portion Sb is used as a fulcrum as the pressure difference between the high-pressure space Vh and the low-pressure space Vl and the rotation of the piston rotors 13A and 13B. A moment from the high pressure space Vh side toward the low pressure space Vl side is applied to the blade B. As a result, the blade B is in a state of being pressed against the inner wall of the blade accommodating portion Sb (that is, a portion of the blade accommodating portion on the low-voltage space side end surface including the radial inner end edge). As a result, the posture of the blade B changes in the direction toward the low pressure space side from the outer side in the radial direction to the inner side. In the above configuration, the first connection surface A1c is formed in the portion of the blade accommodating portion Sb to which the blade B is pressed. The first connection surface A1c extends from the outer side in the radial direction toward the inner side toward the low pressure space Vl side. That is, when the posture of the blade B changes as described above, the first connection surface A1c expands in the direction along the posture. Therefore, for example, the frictional resistance generated between the blade B and the blade accommodating portion Sb can be reduced as compared with the configuration in which the blade accommodating portion Sb simply extends in the radial direction. As a result, the blade B can be made to follow the turning of the piston rotors 13A and 13B more smoothly.

(2) In the rotary compressor 100 according to the second aspect, the portion of the blade accommodating portion Sb on the end face on the high pressure space Vh side, including the radial outer edge, is the radial inner side. A second connecting surface A2c extending from the high pressure space Vh side toward the outside is formed.

Here, during the operation of the rotary compressor 100, the radial inner edge of the blade accommodating portion Sb is used as a fulcrum as the pressure difference between the high-pressure space Vh and the low-pressure space Vl and the rotation of the piston rotors 13A and 13B. A moment from the high pressure space Vh side toward the low pressure space Vl side is applied to the blade B. As a result, the blade B is pressed against the inner wall of the blade accommodating portion Sb (that is, the portion of the blade accommodating portion Sb on the high-pressure space Vh side end surface including the radial outer edge). .. As a result, the posture of the blade B changes in the direction toward the low pressure space Vl side from the outer side to the inner side in the radial direction. In the above configuration, the second connecting surface A2c is formed in the portion of the blade accommodating portion Sb where the blade B is pressed. The second connecting surface A2c extends toward the high pressure space Vh side from the inside to the outside in the radial direction. That is, when the posture of the blade B changes as described above, the second connecting surface A2c expands in the direction along the posture. Therefore, for example, the frictional resistance generated between the blade B and the blade accommodating portion Sb can be reduced as compared with the configuration in which the blade accommodating portion Sb simply extends in the radial direction. As a result, the blade B can be made to follow the turning of the piston rotors 13A and 13B more smoothly.

(3) In the rotary compressor 100 according to the third aspect, the blade B2 extends in the inclined direction toward the low pressure space Vl side from the outer side in the radial direction to the inner side, and is movable in the inclined direction. The elastic member G2 is configured to urge the blade B2 in the inclined direction.

According to the above configuration, the blade B2 extends in the inclined direction toward the low pressure space Vl side in advance from the outer side to the inner side in the radial direction. Further, the elastic member G2 urges the blade B2 in the inclination direction. Therefore, the frictional resistance generated between the blade B2 and the blade accommodating portion Sb when the pressure difference between the high pressure space Vh and the low pressure space Vl and the moment associated with the rotation of the piston rotors 13A and 13B are applied to the blade B2. Can be further reduced.

(4) In the rotary compressor 100 according to the fourth aspect, the portion of the blade B3 that comes into contact with the first connection surface A1c is made of a resin material.
Specific examples of such resin materials include polyoxymethylene (POM), polyamide (PA), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and polytetrafluoroethylene (PTFE). Polyetheretherketone (PEEK) and polyimide (PI) can be mentioned.

According to the above configuration, the frictional resistance generated between the blade B3 and the first connecting surface A1c can be further reduced as compared with the configuration in which the blade B3 is made of a metal material, for example.

(5) In the rotary compressor 100 according to the fifth aspect, the portion of the blade B3 that comes into contact with the second connecting surface A2c is made of a resin material.
Specific examples of such resin materials include polyoxymethylene (POM), polyamide (PA), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and polytetrafluoroethylene (PTFE). Polyetheretherketone (PEEK) and polyimide (PI) can be mentioned.

According to the above configuration, the frictional resistance generated between the blade B3 and the second connecting surface A2c can be further reduced as compared with the configuration in which the blade B3 is made of a metal material, for example.

100 ... Rotary compressor 10 ... Compressor body 10A ... Compressor 11 ... Housing 12A, 12B ... Cylinder 12H ... Cylinder body 12S ... Outer surface 12T ... Inside the cylinder Peripheral surface 13A ... First piston rotor 13B ... Second piston rotor 14A ... First crankshaft 14B ... Second crankshaft 16 ... Crankshaft 17A ... Upper bearing 17B ... Lower bearing 18 ... Motor 19A ... Rotor 19B ... Stator 22A, 22B ... Opening 23A, 23B ... Suction port 24 ... Accumulator 25 ... Stay 26A, 26B ... Suction pipe A1 ... Front surface A1c ... First connection surface A2 ... Rear surface A2c ... Second connection surface B, B2, B3 ... Blades Bm1, Bm2 ... Metal parts Bp1, Bp2 ...・ Resin part Bo ・ ・ ・ Blade outer surface Bs ・ ・ ・ Axial sliding surface Bt ・ ・ ・ Tip Bb ・ ・ ・ Base end C, C1, C2 ・ ・ ・ Compressor chamber G, G2 ・ ・ ・ Elastic member O ・ ・-Axis lines O1, O2 ... Rotor axis lines P1, P2 ... Overhanging part Sb ... Blade accommodating part V ... Discharge space Vh ... High-pressure space Vl ... Low-pressure space

Claims (5)

A crankshaft that can rotate around the axis and
A compression unit in which a compression chamber for compressing the refrigerant with the rotation of the crankshaft is formed, and
With
The compression unit is
A piston rotor provided on the crankshaft and swiveling around the axis at a position eccentric from the axis.
An annular cylinder that covers the piston rotor from the outer peripheral side,
An upper bearing and a lower bearing that form the compression chamber together with the cylinder by covering the cylinders from the axial direction, respectively.
A blade that is arranged in the compression chamber and is movable in a direction containing the radial component in a state where the tip is in contact with the outer peripheral surface of the piston rotor, and separates the compression chamber into a low pressure space and a high pressure space. ,
An elastic member that urges the blade in a direction containing the radial component, and
Have,
The cylinder has an elastic blade accommodating portion extending in the radial direction from the inner peripheral surface of the cylinder and accommodating the blade so as to be movable, and an elastic body communicating with the radial outer side of the blade accommodating portion to accommodating the elastic member. A member housing is formed,
A first connection extending from the radial outer side to the inner side toward the low pressure space side on the end surface of the blade accommodating portion on the low pressure space side and including the radial inner end edge. A rotary compressor with a surface formed. A second connection extending from the inside to the outside in the radial direction toward the high pressure space side on the end surface of the blade accommodating portion on the high pressure space side and including the edge on the outer side in the radial direction. The rotary compressor according to claim 1, wherein the surface is formed. The blade extends in an inclined direction toward the low pressure space side from the outer side in the radial direction to the inner side, and is movable in the inclined direction.
The rotary compressor according to claim 1 or 2, wherein the elastic member is configured to urge the blade in the inclination direction. The rotary compressor according to any one of claims 1 to 3, wherein the portion of the blade that comes into contact with the first connecting surface is made of a resin material. The rotary compressor according to claim 4, wherein the portion of the blade that comes into contact with the second connecting surface is made of a resin material.

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