A compressor and an air conditioner

Abstract

The present invention provides a compressor and an air conditioner, comprising a first rotor, the first rotor including a first working part and a second working part; a first shaft body for carrying the first working part and the second working part; a second rotor, the second rotor including a third working part meshing with the first working part and a fourth working part meshing with the second working part; a second shaft body for carrying the third working part and the fourth working part; a third rotor, the third rotor including a fifth working part and a sixth working part; a third shaft body coaxial with the first shaft body for carrying the fifth working part and the sixth working part; a fourth rotor, the fourth rotor including a seventh working part and an eighth working part; a fourth shaft body for carrying the seventh working part and the eighth working part, the fourth shaft body being coaxial with the second shaft body, the seventh working part meshing with the fifth working part, and the eighth working part meshing with the sixth working part. When increasing the exhaust volume, the compressor does not need to occupy too much space.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a compressor and an air conditioner. Background Art

[0002] Generally, a compressor is provided with a pair of parallel spiral rotors, and this pair of spiral rotors is placed in the space volume of the housing of the screw compressor. During the rotation of this pair of spiral rotors, the space volume will periodically increase and decrease, so that the space volume is periodically connected and closed to the air inlet and the air outlet, and the processes of air intake, compression and exhaust can be completed.

[0003] Currently, in order to increase the exhaust volume of the compressor, usually the spiral rotor structure is made larger, which will lead to an increase in the structural size of the compressor and an increase in the occupied space. Summary of the Invention

[0004] Embodiments of the present invention provide a compressor and an air conditioner to solve the problem that the compressor occupies too much space when the exhaust volume of the compressor is increased.

[0005] In a first aspect, an embodiment of the present invention provides a compressor, including:

[0006] A first rotor capable of rotating along a first axis, the first rotor including a first working part and a second working part;

[0007] A first shaft body carrying the first working part and the second working part;

[0008] A second rotor capable of rotating along a second axis, the second rotor including a third working part and a fourth working part;

[0009] A second shaft body carrying the third working part and the fourth working part, the third working part meshing with the first working part, and the fourth working part meshing with the second working part;

[0010] A third rotor capable of rotating along a third axis, the third rotor including a fifth working part and a sixth working part;

[0011] A third shaft body carrying the fifth working part and the sixth working part, the third shaft body being coaxially arranged with the first shaft body;

[0012] A fourth rotor capable of rotating along a fourth axis, the fourth rotor including a seventh working part and an eighth working part; and

[0013] A fourth shaft body carrying the seventh working part and the eighth working part, the fourth shaft body being coaxially arranged with the second shaft body, the seventh working part meshing with the fifth working part, and the eighth working part meshing with the sixth working part.

[0014] In an alternative embodiment of the present invention, the compressor further includes an electric motor. The first shaft body and the third shaft body are respectively disposed on opposite sides of the electric motor. The electric motor includes a first output end and a second output end. The first shaft body is drivingly connected to the first output end, and the third shaft body is drivingly connected to the second output end.

[0015] In an alternative embodiment of the present invention, during the rotation of the first rotor, there is a force along the axial direction of the first shaft body and towards a preset direction, and during the rotation of the third rotor, there is a force along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

[0016] In an alternative embodiment of the present invention, the compressor further includes a first hydraulic device and a second hydraulic device. The first hydraulic device is disposed on the first shaft body and is used to apply a force along the axial direction of the first shaft body and towards a preset direction; the second hydraulic device is disposed on the third shaft body and is used to apply a force along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

[0017] In an alternative embodiment of the present invention, the compressor further includes an electric motor. The first shaft body and the third shaft body are disposed on the same side of the electric motor. The first shaft body is drivingly connected to the output end of the electric motor, and the third shaft body is fixedly connected to the first shaft body.

[0018] In an alternative embodiment of the present invention, during the rotation of the first rotor and the third rotor, there is a resultant force along the axial direction of the first shaft body and towards a preset direction.

[0019] In an alternative embodiment of the present invention, the compressor further includes a third hydraulic device. The third hydraulic device is disposed on the first shaft body and is used to apply a force along the axial direction of the first shaft body and towards a preset direction, so that the first shaft body and the third shaft body have a resultant force along the preset direction.

[0020] In an alternative embodiment of the present invention, the compressor further includes a fourth hydraulic device. The fourth hydraulic device is disposed on the third shaft body and is used to apply a force along the axial direction of the third shaft body and towards a preset direction, so that the first shaft body and the third shaft body have a resultant force along the preset direction.

[0021] In an alternative embodiment of the present invention, the first shaft body and the third shaft body are integrally formed.

[0022] In a second aspect, an embodiment of the present invention further provides an air conditioner, including the compressor as described above.

[0023] For the compressor and the air conditioner provided by the embodiments of the present invention, a first rotor, a second rotor, a third rotor, and a fourth rotor are provided. The first rotor and the third rotor are coaxially arranged, and the second rotor and the fourth rotor are coaxially arranged. The first rotor includes a first working part and a second working part, and the second rotor includes a third working part and a fourth working part. During the rotation of the first rotor, it can mesh with the second rotor, that is, the first working part meshes with the third working part, and the second working part meshes with the fourth working part, so that the first rotor and the second rotor can form two sets of rotor pairs. During the rotation of the third rotor, it can mesh with the fourth rotor, that is, the fifth working part meshes with the seventh working part, and the sixth working part meshes with the eighth working part, so that the third rotor and the fourth rotor can form two sets of rotor pairs. Thus, with the cooperation of the first rotor, the second rotor, the third rotor, and the fourth rotor, four sets of rotor pairs can be formed. Compared with the prior art, the meshing of the first rotor, the second rotor, the third rotor, and the fourth rotor in the embodiments of the present invention is equivalent to combining four screw compressors. And compared with four independent screw compressors, the compressor in the embodiments of the present invention is more compact and has fewer parts. Therefore, when increasing the exhaust volume, the compressor in the embodiments of the present invention does not need to occupy too much space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] In order to more completely understand the present invention and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0026] Figure 1 It is a partial schematic diagram of the first structure of the compressor provided by the embodiment of the present invention.

[0027] Figure 2 For setting the first hydraulic device on the first shaft body in Figure 1 It is a partial schematic diagram.

[0028] Figure 3 For Figure 2 It is the first local schematic diagram of the connection between the first shaft body and the cylinder block in

[0029] Figure 4 For Figure 2The second partial schematic diagram of the connection between the first shaft body and the cylinder block.

[0030] Figure 5 For Figure 2 The third partial schematic diagram of the connection between the first shaft body and the cylinder block.

[0031] Figure 6 For Figure 2 The fourth partial schematic diagram of the connection between the first shaft body and the cylinder block.

[0032] Figure 7 For the partial schematic diagram when the second hydraulic device is arranged on the third shaft body in Figure 1 The partial schematic diagram when the second hydraulic device is arranged on the third shaft body in

[0033] Figure 8 The partial schematic diagram of the second structure of the compressor provided by the embodiment of the present invention.

[0034] Figure 9 For the partial schematic diagram when the third hydraulic device is arranged on the first shaft body in Figure 8 The partial schematic diagram when the third hydraulic device is arranged on the first shaft body in

[0035] Reference numerals:

[0036] 100, compressor; 10, motor; 11, motor stator; 12, motor rotor;

[0037] 21, first shaft body; 212, first sealing groove; 213, second sealing groove; 214, positioning shoulder;

[0038] 22, first rotor; 221, first working part; 222, second working part;

[0039] 23, second shaft body; 232, first channel;

[0040] 24, second rotor; 241, third working part; 242, fourth working part;

[0041] 25, third rotor; 251, fifth working part; 252, sixth working part;

[0042] 26, third shaft body; 27, fourth shaft body;

[0043] 28, fourth rotor; 281, seventh working part; 282, eighth working part;

[0044] 30, first housing; 301, first housing body; 302, first end cover; 3021, second channel; 303, second end cover;

[0045] 40. First hydraulic device; 401. Cylinder block; 4011. First space; 4012. Second space; 4013. Liquid inlet; 4014. Annular sealing teeth; 402. Piston; 403. Sealing ring; 404. Slip ring; 405. Fastener;

[0046] 50. Thrust bearing; 60. Second housing; 70. Second hydraulic device; 80. Third hydraulic device;

[0047] H1. First direction; H2. Second direction. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0049] The embodiments of the present invention provide a compressor and an air conditioner to solve the problem that the compressor occupies too much space when the exhaust volume of the compressor is increased. The following will be described in conjunction with the accompanying drawings.

[0050] Please refer to Figure 1 , Figure 1 which is a partial schematic diagram of the first structure of the compressor provided by the embodiment of the present invention. Figure 1 The shown compressor 100 may be a screw compressor, such as the compressor 100 being an opposed screw compressor. The compressor 100 may include a motor 10 and a rotor assembly, and the motor 10 is in driving connection with the rotor assembly to drive the rotor assembly to rotate. Among them, the rotor assembly may include a first shaft body 21, a first rotor 22, a second shaft body 23, a second rotor 24, a third rotor 25, a third shaft body 26, a fourth shaft body 27, and a fourth rotor 28. The first rotor 22, the second rotor 24, the third rotor 25, and the fourth rotor 28 may be accommodated and supported by a housing. Among them, the first shaft body 21 bears the first rotor 22, the second shaft body 23 bears the second rotor 24, the third shaft body 26 bears the third rotor 25, and the fourth shaft body 27 bears the fourth rotor 28. The first rotor 22 and the second rotor 24 mesh with each other and are accommodated and supported in the first housing 30, and the third rotor 25 and the fourth rotor 28 mesh with each other and are accommodated and supported in the second housing 60.

[0051] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0052] Please continue reading Figure 1 In the embodiment of the present invention, the first rotor 22 and the third rotor 25 may be male rotors, and the second rotor 24 and the fourth rotor 28 may be female rotors.

[0053] Among them, the first rotor 22 and the third rotor 25 as the positive rotor can be understood as the first rotor 22 and the third rotor 25 are active rotors, and the second rotor 24 and the fourth rotor 28 as the negative rotor can be understood as the second rotor 24 and the fourth rotor 28 are driven rotors. For example, the first rotor 22 and the third rotor 25 can be connected to a driving component such as a motor 10 (including but not limited to a permanent magnet motor), and the first rotor 22 and the third rotor 25 can be driven to rotate by the driving component, and the first rotor 22 rotates while driving the second rotor 24 to rotate, and the third rotor 25 rotates while driving the fourth rotor 28 to rotate. The first rotor 22 and the third rotor 25 are coaxially arranged, and the second rotor 24 and the fourth rotor 28 are coaxially arranged.

[0054] Please continue reading Figure 1 , the first rotor 22 is carried by the first shaft body 21, the first rotor 22 serves as a male rotor, and the first shaft body 21 is transmission-connected to the motor 10. The first shaft body 21 is rotationally connected to the first housing 30, and the motor 10 can drive the first shaft body 21 to rotate, and the first shaft body 21 can rotate along the first axis of the first shaft body 21 together with the first rotor 22 carried by it. That is, the first rotor 22 can rotate in the first housing 30 along the first axis. In an embodiment of the present invention, the first rotor 22 can be integrally formed with the first shaft body 21. In other embodiments of the present invention, a portion of the first rotor 22 can be integrally formed with the first shaft body 21, and a portion can be sleeved on the first shaft body 21. In other embodiments of the present invention, the first rotor 22 can be directly sleeved on the first shaft body 21.

[0055] Exemplarily, the first rotor 22 may have at least two parts, such as the first rotor 22 having a first working part 221 and a second working part 222, and both the first working part 221 and the second working part 222 may be integrally formed with the first shaft body 21. One part of the first working part 221 and the second working part 222, such as the first working part 221, may be integrally formed with the first shaft body 21, and the other part, such as the second working part 222, may be sleeved on the first shaft body 21. Alternatively, both the first working part 221 and the second working part 222 may be sleeved on the first shaft body 21.

[0056] Please continue reading Figure 1, the first working part 221 and the second working part 222 of the first rotor 22 can be helical blades, which can also be called male blades. The number of helical blades can be multiple. In the embodiment of the present invention, the first working part 221 and the second working part 222 are configured to have opposite helical directions, that is, the helix directions of the first working part 221 and the second working part 222 are opposite. When the first rotor 22 and the second rotor 24 mesh and rotate with each other, opposite axial forces are generated between the first working part 221 and the second working part 222, which can also be understood as opposite axial flows are generated between the first working part 221 and the second working part 222.

[0057] It should be noted that in the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0058] Please continue to refer to Figure 1 , the second rotor 24 is carried by the second shaft body 23. The second rotor 24 is used as a female rotor, and the second shaft body 23 is configured to rotatably support the second rotor 24. For example, the second shaft body 23 is fixed on the first housing 30, and the second rotor 24 can rotate relative to the second shaft body 23. The second rotor 24 meshes with the first rotor 22. Exemplarily, the second rotor 24 can have at least two parts, such as the second rotor 24 has a third working part 241 and a fourth working part 242. The third working part 241 and the fourth working part 242 can both be sleeved on the second shaft body 23, and the third working part 241 and the fourth working part 242 can rotate relative to the second shaft body 23.

[0059] Please continue to refer to Figure 1 , the third working part 241 and the fourth working part 242 of the second rotor 24 can be helical blades, which can also be called female blades. The number of helical blades can be multiple. In the embodiment of the present invention, the third working part 241 and the fourth working part 242 are configured to have opposite helical directions, that is, the helix directions of the third working part 241 and the fourth working part 242 are opposite. When the first rotor 22 and the second rotor 24 mesh and rotate with each other, opposite axial forces are generated between the third working part 241 and the fourth working part 242, which can also be understood as opposite axial flows are generated between the third working part 241 and the fourth working part 242. The third working part 241 and the fourth working part 242 can be driven by the first rotor 22 to rotate on the second shaft body 23 along the second axis of the second shaft body 23. It can be understood that the third working part 241 meshes with the first working part 221, and the fourth working part 242 meshes with the second working part 222. Among them, the helix direction of the third working part 241 is opposite to the helix direction of the first working part 221, and the helix direction of the fourth working part 242 is opposite to the helix direction of the second working part 222.

[0060] Please continue to refer to Figure 1, the third rotor 25 is carried by the third shaft body 26. The third rotor 25 serves as a male rotor. It can be understood that the third shaft body 26 is rotatably connected to the second housing 60, and the third shaft body 26 is drivingly connected to the motor 10. The motor 10 can drive the third shaft body 26 to rotate along the third axis of the third shaft body 26. The third rotor 25 meshes with the fourth rotor 28. The third rotor 25 can have at least two parts. For example, the third rotor 25 has a fifth working part 251 and a sixth working part 252, and both the fifth working part 251 and the sixth working part 252 can be integrally formed with the third shaft body 26.

[0061] The fifth working part 251 and the sixth working part 252 of the third rotor 25 can be helical blades, which can also be called male blades. The number of helical blades can be one or more. In the embodiment of the present invention, the fifth working part 251 and the sixth working part 252 are configured to have opposite helical directions, that is, the rotation directions of the fifth working part 251 and the sixth working part 252 are opposite. When the third rotor 25 and the fourth rotor 28 mesh and rotate with each other, opposite axial forces are generated between the fifth working part 251 and the sixth working part 252. It can also be understood that opposite axial flows are generated between the fifth working part 251 and the sixth working part 252.

[0062] Please continue to refer to Figure 1 , the fourth rotor 28 is carried by the fourth shaft body 27. The fourth shaft body 27 is configured to rotatably support the fourth rotor 28. For example, the fourth shaft body 27 is fixed on the second housing 60, and the fourth rotor 28 can rotate relative to the fourth shaft body 27. The fourth rotor 28 meshes with the third rotor 25. The fourth rotor 28 can be driven by the third rotor 25 to rotate on the fourth shaft body 27 along the fourth axis of the fourth shaft body 27. The fourth rotor 28 can have at least two parts. For example, the fourth rotor 28 has a seventh working part 281 and an eighth working part 282, and both the seventh working part 281 and the eighth working part 282 are sleeved on the fourth shaft body 27. Both the seventh working part 281 and the eighth working part 282 can rotate around the fourth axis within the second housing 60.

[0063] The seventh working part 281 meshes with the fifth working part 251, and the eighth working part 282 meshes with the sixth working part 252. Among them, the rotation direction of the seventh working part 281 is opposite to that of the fifth working part 251, and the rotation direction of the eighth working part 282 is opposite to that of the sixth working part 252.

[0064] The seventh working part 281 and the eighth working part 282 of the fourth rotor 28 may be helical blades, which may also be referred to as female blades. The number of helical blades may be one or more. In the embodiments of the present invention, the seventh working part 281 and the eighth working part 282 are configured to have opposite helical directions, that is, the helix directions of the seventh working part 281 and the eighth working part 282 are opposite. When the third rotor 25 and the fourth rotor 28 mesh and rotate with each other, opposite axial forces are generated between the seventh working part 281 and the eighth working part 282, which can also be understood as opposite axial flows are generated between the seventh working part 281 and the eighth working part 282.

[0065] In the compressor 100 according to the embodiments of the present invention, a first rotor 22, a second rotor 24, a third rotor 25 and a fourth rotor 28 are provided. The first rotor 22 and the third rotor 25 are coaxially arranged, and the second rotor 24 and the fourth rotor 28 are coaxially arranged. The first rotor 22 includes a first working part 221 and a second working part 222, and the second rotor 24 includes a third working part 241 and a fourth working part 242. During the rotation of the first rotor 22, it meshes with the second rotor 24, that is, the first working part 221 meshes with the third working part 241, and the second working part 222 meshes with the fourth working part 242, so that the first rotor 22 and the second rotor 24 can form two sets of rotor pairs. During the rotation of the third rotor 25, it meshes with the fourth rotor 28, that is, the fifth working part 251 meshes with the seventh working part 281, and the sixth working part 252 meshes with the eighth working part 282, so that the third rotor 25 and the fourth rotor 28 can form two sets of rotor pairs. Thus, four sets of rotor pairs can be formed under the cooperation of the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28. Compared with the prior art, the meshing of the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28 in the embodiments of the present invention is equivalent to combining four screw compressors 100. And compared with four independent screw compressors 100, the compressor 100 in the embodiments of the present invention is more compact and has fewer parts. Therefore, the compressor 100 in the embodiments of the present invention does not need to occupy too much space when increasing the exhaust volume.

[0066] Among them, in the embodiments of the present invention, only one motor 10 is used for driving, which can further improve the structural compactness of the compressor 100, reduce redundant parts, and enable the compressor 100 not to occupy too much space when increasing the exhaust volume.

[0067] In some embodiments, please refer to Figure 1, the first shaft body 21 and the third shaft body 26 are respectively arranged on opposite sides of the motor 10, that is, the rotor pair formed by the first rotor 22 and the second rotor 24 is located on one side of the motor 10, and the rotor pair formed by the third rotor 25 and the fourth rotor 28 is located on the other side of the motor 10. The motor 10 includes a first output end and a second output end arranged oppositely. The first shaft body 21 is in transmission connection with the first output end, and the third shaft body 26 is in transmission connection with the second output end. The first shaft body 21 and the third shaft body 26 can be synchronously driven to rotate through the first output end and the second output end of the motor 10, so as to drive the rotor pair formed by the first rotor 22 and the second rotor 24, and drive the rotor pair formed by the third rotor 25 and the fourth rotor 28.

[0068] Exemplarily, the motor 10 includes a motor stator 11 and a motor rotor 12. The motor rotor 12 can rotate relative to the motor stator 11. The first shaft body 21 is connected to one end of the motor rotor 12, and the third shaft body 26 is connected to the other end of the motor rotor 12.

[0069] Among them, for the first rotor 22 and the second rotor 24, when the first rotor 22 and the second rotor 24 mesh with each other and rotate together, opposite axial forces can be generated due to the opposite helix directions between the first working part 221 and the second working part 222, and opposite axial forces can be generated due to the opposite helix directions between the third working part 241 and the fourth working part 242. The axial forces between the first working part 221 and the second working part 222 can be offset to a certain extent, and the axial forces between the third working part 241 and the fourth working part 242 can be offset to a certain extent.

[0070] However, it should be noted that in the actual production and processing process, it is found that on the one hand, due to manufacturing deviations, there are some differences in the structures of different parts of the first rotor 22, and there are some differences in the structures of different parts of the second rotor 24. And there are also differences between the first rotor 22 and the second rotor 24. On the other hand, due to assembly tolerances and deviations, there are certain differences in the fit between the first rotor 22 and the second rotor 24. As a result, the axial forces between the first working part 221 and the second working part 222 cannot be completely offset, and the axial forces between the third working part 241 and the fourth working part 242 cannot be completely offset. It is impossible to achieve almost complete cancellation of the axial forces when the first rotor 22 and the second rotor 24 mesh with each other and rotate together, and an axial force resultant force in a random direction will still be formed. As shown in the figure, this axial force resultant force can be directed towards the first direction H1, and this axial force resultant force can also be directed towards the second direction H2.

[0071] On the other hand, in the quantification of compressor products, due to the differences between the rotors in each compressor, the resultant direction of the axial forces generated by the rotors in each compressor is different. For example, in some compressors, the resultant direction of the axial force of the rotor faces the first direction H1, and in some compressors, the resultant direction of the axial force of the rotor faces the second direction H2. That is, in the entire rotor shafting, a resultant force with a random axial direction and a random value appears, thus randomly pushing the entire shafting towards one of the two exhaust end faces, causing the exhaust end face of the rotor on that side to contact and rub against the housing end face, resulting in failures. It can be understood that the same situation also occurs with the third rotor 25 and the fourth rotor 28.

[0072] In the related art, in order to ensure the stable operation of all formed compressors, two sets of thrust bearings (or called axial force bearings) are sleeved on each shaft body of the compressor to limit the resultant axial force of the rotors in all formed compressors, so as to ensure the stable operation of all formed compressors.

[0073] Therefore, it is still inevitably necessary for the thrust bearings to bear the limit. Due to the randomness of the resultant force direction, the thrust bearings need to meet the requirement of being able to bear the limit in both directions. That is, in the actual production and processing of compressors, in order to ensure the limitation of the resultant axial force of the rotors, it is still necessary to have thrust bearings (axial force bearings) that limit in two directions on one rotating shaft. For example, two sets of thrust bearings with opposite bearing directions are set on the compressor to ensure that the resultant axial forces in two randomly occurring directions are borne. For an individual compressor, the randomly occurring resultant direction of the axial force remains unchanged all the time. At this time, one set of thrust bearings is used for limiting, and the other set of thrust bearings is completely idle. Therefore, the cost performance is low, and at the same time, it brings redundant mechanical losses and lubricating oil requirements, and increases the failure rate of the compressor. Eventually, it leads to an increase in the size and cost of the compressor assembly, and to a certain extent, reduces the mechanical efficiency of the shafting operation and increases the demand for lubricating oil.

[0074] Based on this, for Figure 1A situation where the rotor pair formed by the first rotor 22 and the second rotor 24 shown is located on one side of the motor 10, and the rotor pair formed by the third rotor 25 and the fourth rotor 28 is located on the other side of the motor 10. The compressor 100 according to the embodiment of the present application is configured such that during the rotation of the first rotor 22, there is a force along the axial direction of the first shaft body 21 and towards a preset direction, and during the rotation of the third rotor 25, there is a force along the axial direction of the third shaft body 26 and towards the preset direction or opposite to the preset direction. Thus, the specific direction of the axial force in the single direction during the operation of the first rotor 22 can be determined, so as to facilitate taking relevant measures to limit the axial force in the single direction. And the specific direction of the axial force in the single direction during the operation of the third rotor 25 can be determined, so as to facilitate taking relevant measures to limit the axial force in the single direction. Compared with the prior art, it is not necessary to limit both ends of the first shaft body 21 and both ends of the third shaft body 26, but only one end of the first shaft body 21 and one end of the second shaft body 23 need to be limited according to the acting direction of the axial force, reducing the use of components and effectively reducing the structural size of the compressor 100. For example, compared with the prior art that uses two thrust bearings to limit a rotor structure, the embodiment of the present invention can use one thrust bearing 50 to limit one rotor and can operate stably.

[0075] Please refer to Figure 2 , Figure 2 is a partial schematic view when a first hydraulic device is provided on the first shaft body in Figure 1 . In order to make the first rotor 22 have a force along the axial direction of the first shaft body 21 and towards a preset direction during the rotation of the first rotor 22, the embodiment of the present invention provides a first hydraulic device 40 on the first shaft body 21, and applies a force along the axial direction of the first shaft body 21 and towards the preset direction to the first shaft body 21 through the first hydraulic device 40, ensuring that when the first rotor 22 and the second rotor 24 mesh and rotate together, the first rotor 22 and the second rotor 24 have a resultant axial force in a definite and single axial direction. Thus, the embodiment of the present invention only needs to provide a thrust bearing 50 on one end of the first shaft body 21 to limit the resultant axial force in the definite and single axial direction. It can be understood that the thrust bearing 50 can limit the movement of the first shaft body 21 along the direction of the force, ensuring that the first rotor 22 and the second rotor 24 of the compressor 100 according to the embodiment of the present invention can rotate stably without causing the rotor exhaust end face to contact and rub against the end face of the first housing 30. Compared with the related art that needs to use two thrust bearings to be respectively fixed at both ends of a shaft body, the compressor 100 according to the embodiment of the present invention can save multiple thrust bearings 50, and can reduce the overall size and cost of the compressor 100. At the same time, due to the reduction in the number of thrust bearings 50, the operation efficiency of the shafting can be improved to a certain extent, and the demand for lubricating oil can be reduced.

[0076] It can be understood that the first shaft body 21 has a first end portion and a second end portion which are oppositely arranged. The first working portion 221 and the second working portion 222 are located between the first end portion and the second end portion. The first hydraulic device 40 can be arranged on the first end portion or the second end portion of the first shaft body 21, as long as it can apply a force along the axial direction of the first shaft body 21 and towards the preset direction. For example, the preset direction can be along the axial direction of the first shaft body 21 and towards the motor 10. At this time, the direction along the axial direction of the first shaft body 21 and towards the motor 10 can be defined as the first direction H1, and the direction opposite to the first direction H1 is defined as the second direction H2. For example, the first hydraulic device 40 is arranged at one end of the first shaft body 21 close to the motor 10, and the first hydraulic device 40 applies a preset force along the first direction H1 to the first shaft body 21. It can be understood that the preset force in the first direction H1 applied by the first hydraulic device 40 needs to be such that the first shaft body 21 has an axial resultant force along the first direction H1. At this time, the first rotor 22 and the second rotor 24 have a definite axial resultant force towards the first direction H1. At this time, relevant measures can be taken according to the axial resultant force in the definite direction to limit the axial resultant force in the definite direction. For example, a thrust bearing 50 can be arranged at one end portion of the first shaft body 21, and the axial resultant force in the definite direction can be limited through the thrust bearing 50. Since the space at one end of the first shaft body 21 close to the motor 10 is relatively narrow, in order to facilitate the installation of the thrust bearing 50, the thrust bearing 50 can be installed at the end of the first shaft body 21 far from the motor 10. Of course, if the space permits, the thrust bearing 50 can also be arranged at the end of the first shaft body 21 close to the motor 10. It can be understood that the specific installation position of the thrust bearing 50 can be selected according to the specific situation, as long as it can play a role in restricting the movement of the first shaft body 21 along the direction of the force.

[0077] In order to more clearly illustrate the structure of the first hydraulic device 40, the specific structure of the first hydraulic device 40 will be described below with reference to the drawings.

[0078] Exemplarily, high-pressure oil can be used to apply the force in the first hydraulic device 40 of the embodiment of the present invention. Of course, other liquids that will not have a great impact on the compressor 100 can also be used, and the present invention does not limit this here.

[0079] Among them, as Figure 2As shown, the first hydraulic device 40 may include a cylinder block 401 and a piston 402. The cylinder block 401 is fixedly arranged on the outer side of the first housing 30. One end of the first shaft body 21 passes through the first housing 30 and is disposed within the cylinder block 401. The piston 402 is arranged on the first shaft body 21 and is located within the cylinder block 401. Among them, the piston 402 divides the cylinder block 401 into a first space 4011 and a second space 4012. The second space 4012 is used for injecting liquid so that the pressure in the second space 4012 is greater than the pressure in the first space 4011. At this time, a pressure difference is formed between the second space 4012 and the first space 4011. The liquid exerts a force on the piston 402 in the direction of the first space 4011. Since the piston 402 is arranged on the first shaft body 21, this force can also act on the first shaft body 21. That is, the pressure difference formed between the second space 4012 and the first space 4011 causes the first shaft body 21 to have a force along the axial direction of the first shaft body 21 and towards the preset direction. Exemplarily, the first space 4011 is located on the side of the piston 402 close to the motor 10, and the second space 4012 is located on the side of the piston 402 away from the motor 10. The cylinder block 401 is provided with a liquid inlet 4013, and the liquid inlet 4013 is communicated with the second space 4012. At this time, the liquid inlet 4013 can be externally connected to an oil pump, and the oil pump injects high-pressure oil into the second space 4012 through the liquid inlet 4013. Thus, the pressure of the high-pressure oil acting on the piston 402 can be transmitted to the first shaft body 21 through the piston 402, and further causes the first shaft body 21 to have a force along the axial direction of the first shaft body 21 and towards the first space 4011 (i.e., a force towards the first direction H1).

[0080] Of course, in other embodiments, it may also be that the first space is located on the side of the piston away from the motor, the second space is located on the side of the piston close to the motor, the cylinder block is provided with a liquid inlet, and the liquid inlet is communicated with the second space. At this time, the liquid inlet can be externally connected to an oil pump, and the oil pump injects high-pressure oil into the second space through the liquid inlet. Thus, the pressure of the high-pressure oil acting on the piston can be transmitted to the first shaft body through the piston, and further causes the first shaft body to have a force along the axial direction of the first shaft body and towards the second direction H2.

[0081] Among them, in order to make full use of the spatial structure of the rotor assembly, the liquid inlet channel can be combined with the shaft body. For example,[[]] Figure 2 As shown, a first channel 232 penetrating along the axial direction of the second shaft body 23 is provided on the second shaft body 23. That is, the second shaft body 23 can be made into a hollow structure. One end of the first channel 232 is communicated with the liquid inlet 4013, and the end of the first channel 232 away from the liquid inlet 4013 can be used for liquid inlet. That is, the high-pressure oil can flow to the liquid inlet 4013 through the first channel 232 of the second shaft body 23.

[0082] Exemplarily, please continue to refer to Figure 2, the first housing 30 may include a first housing body 301, a first end cover 302, and a second end cover 303. The first housing body 301 is configured to accommodate the first rotor 22 and the second rotor 24. The first end cover 302 is disposed on one side of the first housing body 301, and the second end cover 303 is disposed oppositely on the other side of the first housing body 301. For example, the first end cover 302 is disposed on the side of the first housing body 301 close to the motor 10, and the second end cover 303 is disposed on the side of the first housing body 301 away from the motor 10. One end of the second shaft body 23 is connected to the first end cover 302, and the other end of the second shaft body 23 is connected to the second end cover 303. The thrust bearing 50 may be disposed on the first end cover 302 or the second end cover 303. For example, the thrust bearing 50 is disposed on the second end cover 303.

[0083] Wherein, as Figure 2 shown, for facilitating the flow of the liquid, a second channel 3021 is provided on the first end cover 302. The cylinder block 401 is disposed on the first end cover 302. The liquid inlet 4013 on the cylinder block 401 is communicated with one end of the second channel 3021, and the other end of the second channel 3021 is communicated with the first channel 232 of the second shaft body 23, so that the external high-pressure oil can flow from the first channel 232 into the second space 4012.

[0084] Since the pressure is applied to the piston 402 by the liquid, in order to prevent the liquid from leaking out of the cylinder block 401, a sealing structure may be provided at the connection between the first shaft body 21 and the cylinder block 401. It can be understood that the first shaft body 21 and the cylinder block 401 are rotatably connected. Please refer to Figure 3 , Figure 3 For Figure 2 the first partial schematic view of the connection between the first shaft body and the cylinder block in Figure 4 , Figure 4 For Figure 2 the second partial schematic view of the connection between the first shaft body and the cylinder block in Figure 5 , Figure 5 For Figure 2The third partial schematic diagram of the connection between the first shaft body and the cylinder block. A sealing ring 403 can be used for sealing at the connection between the first shaft body 21 and the cylinder block 401. That is, a first sealing groove 212 for installing the sealing ring 403 can be provided on the first shaft body 21, and the sealing ring 403 is sleeved in the first sealing groove 212. The sealing between the first shaft body 21 and the cylinder block 401 is achieved through the sealing ring 403. Among them, the sealing ring 403 can be an O-ring. In other embodiments, please refer to Figure 6 , Figure 6 is Figure 2 The fourth partial schematic diagram of the connection between the first shaft body and the cylinder block. A slip ring 404 can be used for sealing at the connection between the first shaft body 21 and the cylinder block 401. That is, a second sealing groove 213 for installing the slip ring 404 can be provided on the first shaft body 21, and the slip ring 404 is sleeved in the second sealing groove 213. The sealing between the first shaft body 21 and the cylinder block 401 is achieved through the slip ring 404.

[0085] It can be understood that since the cylinder block 401 is finally sealed in the compressor 100 housing, there may also be a small leakage at the connection between the first shaft body 21 and the cylinder block 401. That is, a small amount of leaked liquid entering the compressor 100 cycle will not have too much impact on the compressor 100. At this time, there is no need to have too high a requirement for the sealing performance of the connection between the first shaft body 21 and the cylinder block 401.

[0086] The first shaft body 21 is driven to rotate by the motor 10. At this time, the piston 402 can be configured to be able to rotate together with the first shaft body 21. That is, the piston 402 is fixedly arranged on the first shaft body 21, and the piston 402 can move relative to the cylinder block 401. In order to prevent the liquid in the second space 4012 from flowing to the first space 4011, a seal is provided between the piston 402 and the inner side wall of the cylinder block 401. For example, a labyrinth seal can be used between the piston 402 and the cylinder block 401, or a clearance seal can be used between the piston 402 and the cylinder block 401. It can be understood that there is no need to have too high a requirement for the seal between the piston 402 and the inner side wall of the cylinder block 401. That is, a small amount of liquid in the second space 4012 can leak into the first space 4011. As long as the leakage amount of the liquid is significantly less than the liquid supply amount, the liquid can exert sufficient pressure on the piston 402. That is, the hydraulic device can play a role in exerting a force on the piston 402 along the axial direction of the first shaft body 21 and towards the preset direction.

[0087] Among them, the piston 402 being fixedly arranged on the first shaft body 21 can be an interference fit between the piston 402 and the first shaft body 21. Such as Figure 2As shown, a positioning shoulder 214 may also be provided on the first shaft body 21. The piston 402 abuts against the positioning shoulder 214. A fastener 405 is provided on the side of the piston 402 facing away from the positioning shoulder 214. The fastener 405 and the positioning shoulder 214 together fix the piston 402 to the first shaft body 21. Wherein, the fastener 405 may be a nut. The nut is tightened on the first shaft body 21 and the nut cooperates with the positioning shoulder 214 to fix the piston 402 on the first shaft body 21.

[0088] The above is the specific cooperation relationship between the first hydraulic device 40, the first shaft body 21 and the first housing 30. It can be understood that, please refer to Figure 7 , Figure 7 For Figure 1 is a partial schematic diagram when the second hydraulic device is provided on the third shaft body in

[0089] Different from the rotor pair formed by the first rotor 22 and the second rotor 24 being located on one side of the motor 10 and the rotor pair formed by the third rotor 25 and the fourth rotor 28 being located on the other side of the motor 10, in some other embodiments, such as Figure 8 shown, Figure 8Partial schematic diagram of the second structure of the compressor provided by the embodiment of the present invention. The first shaft body 21 and the third shaft body 26 are arranged on the same side of the motor 10. The first shaft body 21 is drivingly connected to the output end of the motor 10, and the third shaft body 26 is fixedly connected to the first shaft body 21, that is, the rotor pair formed by the first rotor 22 and the second rotor 24 and the rotor pair formed by the third rotor 25 and the fourth rotor 28 are located on the same side of the motor 10. Among them, the fixed connection between the third shaft body 26 and the first shaft body 21 can be that the third shaft body 26 is fixedly connected to the first shaft body 21 through a coupling, or the third shaft body 26 and the first shaft body 21 are integrally formed, that is, the third shaft body 26 and the first shaft body 21 are the same shaft body.

[0090] At this time, in order to reduce the use of the thrust bearing 50, it can be understood that during the rotation of the first rotor 22 and the third rotor 25, there is a resultant force along the axial direction of the first shaft body 21 and towards the preset direction. This resultant force can also be provided by a hydraulic device.

[0091] Exemplarily, please refer to Figure 9 and combine with Figure 8 , Figure 9 For the partial schematic diagram when a third hydraulic device is arranged on the first shaft body in Figure 8 A third hydraulic device 80 can be arranged on the first shaft body 21 to apply a force along the axial direction of the first shaft body 21 and towards the preset direction to the first shaft body 21, so that the first shaft body 21 and the third shaft body 26 have a resultant force along the preset direction. This preset direction can be the first direction H1 or the second direction H2. By applying a force along the axial direction of the first shaft body 21 and towards the preset direction to the first shaft body 21 through the third hydraulic device 80, it is ensured that when the first rotor 22 and the second rotor 24 mesh and rotate together and the third rotor 25 and the fourth rotor 28 mesh and rotate together, the first rotor 22, the second rotor 24, the third rotor 25 and the fourth rotor 28 have a resultant axial force in a definite and single axial direction. It can be understood that the specific structure of the third hydraulic device 80 and the specific cooperation relationship between the third hydraulic device 80 and the first shaft body 21 are substantially the same as those of the first hydraulic device 40. Specifically, reference can be made to the above description of the first hydraulic device 40, so it will not be elaborated here.

[0092] Exemplarily, a fourth hydraulic device (not shown) can also be arranged on the third shaft body 26. For example, the fourth hydraulic device can be located at position A (such as Figure 8As shown in the figure, position A is between the first rotor 22 and the third rotor 25. Of course, the fourth hydraulic device can also be arranged at one end of the third shaft body 26 away from the first rotor 22. The fourth hydraulic device is used to apply a force to the third shaft body 26 along the axial direction of the third shaft body 26 and towards the preset direction, so that the first shaft body 21 and the third shaft body 26 have a resultant force along the preset direction. The preset direction can be the first direction H1 or the second direction H2. It can be understood that the specific structure of the fourth hydraulic device and the specific cooperation relationship between the fourth hydraulic device and the third shaft body 26 are substantially the same as those of the first hydraulic device 40. For details, reference can be made to the above description of the first hydraulic device 40, so it will not be elaborated here.

[0093] In some other embodiments, when the first shaft body 21 and the third shaft body 26 are arranged on the same side of the motor 10, that is, when the rotor pair formed by the first rotor 22 and the second rotor 24 and the rotor pair formed by the third rotor 25 and the fourth rotor 28 are located on the same side of the motor 10, the second working part 222 of the first rotor 22 and the fifth working part 251 of the third rotor 25 can be arranged as close as possible, and the fourth working part 242 of the second rotor 24 and the seventh working part 281 of the fourth rotor 28 can be arranged as close as possible, so as to improve the structural compactness of the compressor 100, and further reduce the structural occupied space of the compressor 100.

[0094] An embodiment of the present invention further provides an air conditioner, which includes the compressor 100 defined by combining one or more of the above embodiments.

[0095] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not elaborated in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] The compressor and the air conditioner provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A compressor, characterized in that, comprising: a first rotor capable of rotating along a first axis, the first rotor including a first working portion and a second working portion; the first working portion and the second working portion have opposite rotation directions; a first shaft body carrying the first working portion and the second working portion; a second rotor capable of rotating along a second axis, the second rotor including a third working portion and a fourth working portion; the third working portion and the fourth working portion have opposite rotation directions; a second shaft body carrying the third working portion and the fourth working portion, the third working portion meshing with the first working portion, and the fourth working portion meshing with the second working portion; a third rotor capable of rotating along a third axis, the third rotor including a fifth working portion and a sixth working portion; the fifth working portion and the sixth working portion have opposite rotation directions; a third shaft body carrying the fifth working portion and the sixth working portion, the third shaft body being coaxially arranged with the first shaft body; a fourth rotor capable of rotating along a fourth axis, the fourth rotor including a seventh working portion and an eighth working portion; the seventh working portion and the eighth working portion have opposite rotation directions; and a fourth shaft body carrying the seventh working portion and the eighth working portion, the fourth shaft body being coaxially arranged with the second shaft body, the seventh working portion meshing with the fifth working portion, and the eighth working portion meshing with the sixth working portion.

2. The compressor according to claim 1, characterized in that, the compressor further includes a motor, the first shaft body and the third shaft body are respectively arranged on opposite sides of the motor, the motor includes a first output end and a second output end, the first shaft body is in driving connection with the first output end, and the third shaft body is in driving connection with the second output end.

3. The compressor according to claim 2, characterized in that, during the rotation of the first rotor, there is a force along the axial direction of the first shaft body and towards a preset direction, and during the rotation of the third rotor, there is a force along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

4. The compressor according to claim 3, characterized in that, the compressor further includes a first hydraulic device and a second hydraulic device, the first hydraulic device is arranged on the first shaft body and is used to apply a force along the axial direction of the first shaft body and towards the preset direction; the second hydraulic device is arranged on the third shaft body and is used to apply a force along the axial direction of the third shaft body and towards the preset direction or opposite to the preset direction.

5. The compressor according to claim 1, characterized in that, the compressor further includes a motor, the first shaft body and the third shaft body are arranged on the same side of the motor, the first shaft body is in driving connection with the output end of the motor, and the third shaft body is fixedly connected to the first shaft body.

6. The compressor according to claim 5, characterized in that, During the rotation of the first rotor and the third rotor, there is a resultant force along the axial direction of the first shaft body and towards a preset direction.

7. The compressor according to claim 6, wherein, the compressor further includes a third hydraulic device disposed on the first shaft body for applying a force along the axial direction of the first shaft body and towards a preset direction to the first shaft body, so that the first shaft body and the third shaft body have a resultant force along the preset direction.

8. The compressor according to claim 6, wherein, the compressor further includes a fourth hydraulic device disposed on the third shaft body for applying a force along the axial direction of the third shaft body and towards a preset direction to the third shaft body, so that the first shaft body and the third shaft body have a resultant force along the preset direction.

9. The compressor according to claim 5, wherein, the first shaft body and the third shaft body are integrally formed.

10. An air conditioner, wherein, it includes the compressor according to any one of claims 1-9.

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