Compressor and air conditioner

Abstract

The application provides a compressor and an air conditioner. The compressor is applied to the air conditioner and comprises a shell, a first rotating shaft, a connecting assembly and a first rotor assembly. The first rotating shaft is installed in the shell. The connecting assembly is sleeved on the first rotating shaft. The first rotor assembly comprises a first rotor and a second rotor which are coaxially arranged on the connecting assembly. The connecting assembly can carry the first rotor and the second rotor to rotate together around the first rotating shaft. The connecting assembly is also configured to limit the relative position of the first rotor and the second rotor, so that there is a gap between the first rotor and the second rotor. The embodiment of the application can keep a gap between the first rotor and the second rotor without increasing the number of components of the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, and in particular, to a compressor and an air conditioner. BACKGROUND

[0002] Generally, a pair of parallel helical rotors are arranged in a compressor, and the pair of helical rotors form a space volume with the inner wall of the shell. During the working process of the helical rotors, the volume periodically increases and decreases. Through reasonable design, the volume is periodically connected and closed with the suction port and the discharge port, so that the whole process of suction, compression and discharge can be completed. Currently, double compressors are widely used in medium cold load range refrigeration air conditioners.

[0003] During the working process of the helical rotors, the pressure difference of the gas at the suction port and the discharge port causes the helical rotors to generate an axial force, which causes the helical rotors to move in the axial direction of the helical rotors in the shell, so that the adjacent end faces of the two helical rotors arranged oppositely collide together. In related technologies, an additional thrust bearing is usually added between the two helical rotors to prevent the adjacent end faces of the two helical rotors from colliding together, but the additional thrust bearing increases the number of components of the compressor, resulting in an increase in the volume of the compressor. SUMMARY

[0004] The present application provides a compressor and an air conditioner, which can maintain a gap between the first rotor and the second rotor without increasing the number of components of the compressor.

[0005] The present application provides a compressor, which comprises:

[0006] a shell;

[0007] a first rotating shaft installed in the shell;

[0008] a connecting assembly sleeved on the first rotating shaft; and

[0009] a first rotor assembly, the first rotor assembly comprising a first rotor and a second rotor coaxially arranged on the connecting assembly, the connecting assembly being capable of bearing the first rotor and the second rotor to rotate together around the first rotating shaft;

[0010] wherein the connecting assembly is configured to limit the relative positions of the first rotor and the second rotor, so that the first rotor and the second rotor have a gap therebetween.

[0011] In an alternative embodiment of the present application, the first rotor has a first axial gap between an end face distal to the second rotor and an end face of the housing proximal to the first rotor, the second rotor has a second axial gap between an end face distal to the first rotor and an end face of the housing proximal to the second rotor, the connecting assembly is configured to limit the gap between the first rotor and the second rotor to be greater than the first axial gap, and the gap between the first rotor and the second rotor is greater than the second axial gap.

[0012] In an alternative embodiment of the present application, the compressor further comprises:

[0013] a second shaft installed in the housing; and

[0014] a second rotor assembly comprising a third rotor and a fourth rotor coaxially arranged on the second shaft, the second shaft being configured to drive the second rotor assembly to rotate in a direction opposite to the rotation direction of the first rotor assembly, the third rotor being engaged with the first rotor, and the fourth rotor being engaged with the second rotor.

[0015] In an alternative embodiment of the present application, an end face of the third rotor proximal to the fourth rotor protrudes from an end face of the first rotor proximal to the second rotor, and an end face of the fourth rotor proximal to the third rotor protrudes from an end face of the second rotor proximal to the first rotor, so that the first rotor and the fourth rotor do not interfere with each other, and the second rotor and the third rotor do not interfere with each other.

[0016] In an alternative embodiment of the present application, the adjacent end faces of the third rotor and the fourth rotor are engaged.

[0017] In an alternative embodiment of the present application, the distance between an end face of the third rotor proximal to the fourth rotor and an end face of the first rotor proximal to the second rotor in the axial direction of the second shaft is d1, the distance between an end face of the fourth rotor proximal to the third rotor and an end face of the second rotor proximal to the first rotor in the axial direction of the second shaft is d2, and the second rotor assembly is configured to satisfy d2=d1.

[0018] In an optional embodiment of the present application, a gap between the first rotor and the second rotor is L3, an axial movement amount of the third rotor in the housing along the axial direction of the second rotation shaft towards the fourth rotor is D1, an axial movement amount of the second rotor towards the first rotor is D2, an axial movement amount of the fourth rotor in the housing along the axial direction of the second rotation shaft towards the third rotor is D3, and an axial movement amount of the first rotor towards the second rotor is D4, and the second rotor assembly is configured to satisfy L3≥D1+D2 and L3≥D3+D4.

[0019] In an optional embodiment of the present application, the first rotor, the second rotor, the third rotor and the fourth rotor are provided with air suction ports at adjacent positions, the first rotor, the third rotor and the housing are provided with first air exhaust ports at adjacent positions, and the second rotor, the fourth rotor and the housing are provided with second air exhaust ports at adjacent positions.

[0020] In an optional embodiment of the present application, the helical direction of the first rotor is opposite to that of the second rotor, and the helical direction of the third rotor is opposite to that of the fourth rotor.

[0021] In an optional embodiment of the present application, the third rotor is integrally formed with the second rotation shaft, the fourth rotor has an axial hole matched with the second rotation shaft, and the axial hole and the second rotation shaft are in tight fit.

[0022] In an optional embodiment of the present application, the compressor further comprises a thrust bearing arranged on one side of the second rotation shaft and a motor arranged on the other side of the second rotation shaft, and the motor is configured to drive the second rotation shaft to rotate, so that the second rotor assembly rotates with the second rotation shaft and drives the first rotor assembly and the connecting assembly to rotate around the first rotation shaft.

[0023] In an optional embodiment of the present application, an end face of the third rotor away from the fourth rotor is flush with an end face of the first rotor away from the second rotor in a direction perpendicular to the axial direction of the second rotation shaft, and an end face of the fourth rotor away from the third rotor is flush with an end face of the second rotor away from the first rotor in a direction perpendicular to the axial direction of the second rotation shaft.

[0024] In an alternative embodiment of the present application, the connecting assembly comprises a first limiting member and a second limiting member, both of which are sleeved on the first rotating shaft and can rotate around the first rotating shaft, the first limiting member is configured to limit the position of the end face of the first rotor close to the second rotor, and the second limiting member is configured to limit the position of the end face of the second rotor close to the first rotor.

[0025] In an alternative embodiment of the present application, the end face of the first rotor close to the second rotor is provided with a first limiting groove along the axial direction of the first rotating shaft, the first limiting member comprises a first main body portion and a first limiting portion, the first main body portion is sleeved on the first rotating shaft, and the first limiting portion is arranged around the outer surface periphery of the first main body portion and is clamped in the first limiting groove; the end face of the second rotor close to the first rotor is provided with a second limiting groove along the axial direction of the first rotating shaft, the second limiting member comprises a second main body portion and a second limiting portion, the second main body portion is sleeved on the first rotating shaft and is arranged adjacent to the first main body portion, and the second limiting portion is arranged around the outer surface periphery of the second main body portion and is clamped in the second limiting groove.

[0026] In an alternative embodiment of the present application, the end face of the first limiting portion close to the second limiting portion protrudes on one side of the end face of the first rotor close to the second rotor, and the end face of the second limiting portion close to the first limiting portion protrudes on one side of the end face of the second rotor close to the first rotor.

[0027] In an alternative embodiment of the present application, the distance between the end face of the first rotor close to the second rotor and the end face of the second rotor close to the first rotor in the axial direction of the first rotating shaft gradually increases from the axis of the first rotor assembly to the outer periphery of the first rotor assembly.

[0028] In an alternative embodiment of the present application, the first limiting member comprises a first main body portion and a first limiting portion, the first main body portion is sleeved on the first rotating shaft, and the first limiting portion is arranged around the outer surface periphery of the first main body portion, one side of the first limiting portion away from the second rotor abuts against the end face of the first rotor close to the second rotor; the second limiting member comprises a second main body portion and a second limiting portion, the second main body portion is sleeved on the first rotating shaft and is arranged adjacent to the first main body portion, and the second limiting portion is arranged around the outer surface periphery of the second main body portion, one side of the second limiting portion away from the first rotor abuts against the end face of the second rotor close to the first rotor.

[0029] In an alternative embodiment of the present application, the connecting assembly further comprises a third limiting member and a fourth limiting member, the third limiting member is configured to limit the distance between the end face of the first rotor away from the second rotor and the shell, and the fourth limiting member is configured to limit the distance between the end face of the second rotor away from the first rotor and the shell.

[0030] In an alternative embodiment of the present application, the third limiting member comprises a third main body part and a third limiting part, the third main body part is sleeved on the first rotating shaft and arranged adjacent to the first main body part, and the third limiting part is arranged around the outer surface of the third main body part, and the third limiting part is in abutment with the end face of the first rotor away from the second rotor; and the fourth limiting member comprises a fourth main body part and a fourth limiting part, the fourth main body part is sleeved on the first rotating shaft and arranged adjacent to the second main body part, and the fourth limiting part is arranged around the outer surface of the fourth main body part, and the fourth limiting part is in abutment with the end face of the second rotor away from the first rotor.

[0031] In an alternative embodiment of the present application, the end face of the first rotor away from the second rotor is provided with a third limiting groove along the axial direction of the first rotating shaft, the third limiting member comprises a third main body part and a third limiting part, the third main body part is sleeved on the first rotating shaft and arranged adjacent to the first main body part, and the third limiting part is arranged around the outer surface of the third main body part and clamped in the third limiting groove; and the end face of the second rotor away from the first rotor is provided with a fourth limiting groove along the axial direction of the first rotating shaft, the fourth limiting member comprises a fourth main body part and a fourth limiting part, the fourth main body part is sleeved on the first rotating shaft and arranged adjacent to the second main body part, and the fourth limiting part is arranged around the outer surface of the fourth main body part and clamped in the fourth limiting groove.

[0032] In an alternative embodiment of the present application, the material of the connecting assembly comprises tin bronze material.

[0033] In an alternative embodiment of the present application, the first rotating shaft and the connecting assembly are both provided with an oil supply channel, and the oil supply channel located on the first rotating shaft is in communication with the oil supply channel located on the connecting assembly.

[0034] The present application also provides an air conditioner comprising the compressor as described above.

[0035] The embodiment of the present application improves the connecting assembly connecting the first rotating shaft and the first rotor assembly, so that the connecting assembly can limit the relative position between the first rotor and the second rotor, and the gap between the first rotor and the second rotor can be kept without additional components, thereby ensuring that the adjacent end faces of the first rotor and the second rotor do not collide with each other. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 A cross-sectional view of the compressor is provided for the embodiment.

[0038] Figure 2 For Figure 1 A partial structure schematic view of the first rotating shaft, the first rotor assembly and the connecting assembly in the compressor is shown.

[0039] Figure 3 For Figure 2 An enlarged structure schematic view of part A of the first rotating shaft, the first rotor assembly and the connecting assembly is shown.

[0040] Figure 4 For Figure 2 An enlarged structure schematic view of part B of the first rotating shaft, the first rotor assembly and the connecting assembly is shown.

[0041] Figure 5 For Figure 2 An enlarged structure schematic view of part C of the first rotating shaft, the first rotor assembly and the connecting assembly is shown.

[0042] Figure 6 For Figure 1 A structure schematic view of the first limiting piece in the compressor is shown.

[0043] Figure 7 For Figure 6 A cross-sectional view of the first limiting piece along the P-P direction is shown.

[0044] Figure 8 For Figure 1 A three-dimensional structure view of the first rotating shaft, the second rotating shaft, the first rotor assembly and the second rotor assembly in the compressor is shown.

[0045] Figure 9 For Figure 2 A second structure schematic view of the first rotating shaft, the first rotor assembly and the connecting assembly is shown.

[0046] Figure 10 For Figure 1 Fig. 1 is a schematic view of a compressor according to an embodiment of the present application.

[0047] The reference signs represent respectively:

[0048] 200, compressor;

[0049] 10, housing; 11, suction port; 12, first exhaust port; 13, second exhaust port; 14, casing; 15, first bearing seat; 16, second bearing seat;

[0050] 20, first rotating shaft; 21, second oil supply passage; 211, main oil supply passage; 212, auxiliary oil supply passage;

[0051] 30, connecting assembly; 31, first limiting member; 311, first main body part; 312, first limiting part; 3121, first side surface; 3122, second side surface; 313, first shaft hole; 32, second limiting member; 321, second main body part; 322, second limiting part; 3221, third side surface; 3222, fourth side surface; 323, second shaft hole; 33, third limiting member; 331, third main body part; 332, third limiting part; 3321, fifth side surface; 3322, sixth side surface; 34, fourth limiting member; 341, fourth main body part; 3421, seventh side surface; 3422, eighth side surface; 342, fourth limiting part; 35, first oil supply passage;

[0052] 40, first rotor assembly; 41, first rotor; 411, first end surface; 412, second end surface; 413, first limiting groove; 414, first body part; 415, first helical blade; 416, third limiting groove; 42, second rotor; 421, third end surface; 422, fourth end surface; 423, second limiting groove; 424, second body part; 425, second helical blade; 426, fourth limiting groove;

[0053] 50, second rotating shaft; 51, first end part; 52, second end part;

[0054] 60, second rotor assembly; 61, third rotor; 611, fifth end surface; 612, sixth end surface; 613, third helical blade; 62, fourth rotor; 621, seventh end surface; 622, eighth end surface; 623, fourth helical blade;

[0055] 70, thrust bearing;

[0056] 80, driving motor;

[0057] 91, first radial bearing; 92, second radial bearing. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0059] Reference herein to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment or embodiments can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. A person of ordinary skill in the art will understand that the embodiments described herein can be combined with one another.

[0060] The present application provides a compressor. Please refer to Figure 1 , Figure 1 The first partial cross-sectional view of the compressor provided for the application embodiment. Figure 1 The compressor 200 shown can be a screw compressor, such as the compressor 200 being a counter-rotating screw compressor. It should be noted that Figure 1 The compressor 200 shown is not limited to a screw compressor, such as the compressor 200 can also be a scroll compressor. The compressor 200 can include a housing 10, a first rotating shaft 20, a connecting assembly 30, and a first rotor assembly 40. The housing 10 can be used to accommodate a portion of the first rotating shaft 20, the connecting assembly 30, and the first rotor assembly 40. It can be understood that the first rotating shaft 20 can be installed in the housing 10, such as the first rotating shaft 20 can be provided in the housing 10, and both ends of the first rotating shaft 20 are exposed outside the housing 10.

[0061] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0062] As Figure 1 shown, the connecting assembly 30 can be sleeved on the first rotating shaft 20, the first rotor assembly 40 can include a first rotor 41 and a second rotor 42, the first rotor 41 and the second rotor 42 are coaxially arranged on the connecting assembly 30, the connecting assembly 30 is configured to carry the first rotor 40 and the second rotor 42 to rotate together around the first rotating shaft 20, and to limit the relative position between the first rotor 41 and the second rotor 42, so that there is a gap between the first rotor 41 and the second rotor 42. The connecting assembly can be a sliding bearing or a rolling bearing.

[0063] In the related art, a spacer is usually arranged between the two rotors of the first rotor assembly 40 to keep the two rotors apart and maintain the gap between the two rotors during rotation. However, the spacer needs to be additionally added, thereby increasing the number of components of the compressor 200. However, the embodiment of the present application directly improves the connecting assembly 30 connecting the first shaft 20 and the first rotor assembly 40, so that the connecting assembly 30 can limit the relative position between the first rotor 41 and the second rotor 42, and the gap between the first rotor 41 and the second rotor 42 can be maintained without additional components, thereby ensuring that the adjacent end faces of the first rotor 41 and the second rotor 42 do not collide with each other. As shown in Figures 2 to 5 Figure 2 For Figure 1 the structure of the first shaft, the first rotor assembly, and the connecting assembly in the compressor shown, Figure 3 Figure 2 the enlarged structure of part A of the first shaft, the first rotor assembly, and the connecting assembly shown, Figure 4 Figure 2 the enlarged structure of part B of the first shaft, the first rotor assembly, and the connecting assembly shown, Figure 5 Figure 2 the enlarged structure of part C of the first shaft, the first rotor assembly, and the connecting assembly shown. The first rotor 41 can include first and second end faces 411 and 412 arranged opposite to each other, the first end face 411 being the end face of the first rotor 41 close to the second rotor 42, and the second end face 412 being the end face of the first rotor 41 away from the second rotor 42. The second rotor 42 can include third and fourth end faces 421 and 422 arranged opposite to each other, the third end face 421 being the end face of the second rotor 42 close to the first rotor 41, and the fourth end face 421 being the end face of the second rotor 42 away from the first rotor 41.

[0064] The first end face 411 is adjacent to and spaced apart from the third end face 421, the second end face 412 is adjacent to and spaced apart from one face of the housing 10, and the fourth end face 422 is opposite to and spaced apart from the other face of the housing 10. The second end face 412 of the first rotor 41 has a first axial gap L1 with the end face of the housing 10 close to the first rotor 41, the fourth end face 4 of the second rotor 42 has a second axial gap L2 with the end face of the housing 10 close to the second rotor 42, and the connecting assembly 30 is configured to limit the relative position of the first rotor 41 and the second rotor 42 so that the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 have a third axial gap L3 therebetween.

[0065] ​​​​It can be understood that, in the embodiment of the present application, when the first rotor 41 moves along the axial direction of the first rotating shaft 20 towards the end face adjacent to the first rotor 41 in the shell 10, since the third axial gap L3 is greater than the first axial gap L1, even if the second end face 411 of the first rotor 41 abuts against the end face adjacent to the first rotor 41 in the shell 10, the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 will not abut against each other, that is, the first rotor 41 and the second rotor 42 still have a gap therebetween.

[0066] When the second rotor 42 moves along the axial direction of the first rotating shaft 20 towards the end face adjacent to the second rotor 42 in the shell 10, since the third axial gap L3 is greater than the second axial gap L2, even if the fourth end face 421 of the second rotor 42 abuts against the end face adjacent to the second rotor 42 in the shell 10, the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 will not abut against each other, that is, the first rotor 41 and the second rotor 42 still have a gap therebetween.

[0067] For example, referring to Figure 2 and Figure 4 , the connecting assembly 30 can include a first limiting member 31 and a second limiting member 32, the first limiting member 31 and the second limiting member 32 are both sleeved on the first rotating shaft 20 and can rotate around the first rotating shaft 20, the first rotor 41 is sleeved on the first limiting member 31 and fixedly connected with the first limiting member 31, so that the first rotor 41 can rotate around the first rotating shaft 20 together with the first limiting member 31, wherein the first limiting member 31 is configured to limit the moving distance of the end face of the first rotor 41 adjacent to the second rotor 42 moving towards the second rotor 42; the second rotor 42 is sleeved on the second limiting member 32 and fixedly connected with the second limiting member 32, so that the second rotor 42 can rotate around the first rotating shaft 20 together with the second limiting member 32, wherein the second limiting member 32 is configured to limit the moving distance of the end face of the second rotor 42 adjacent to the first rotor 41 moving towards the first rotor 41.

[0068] It can be understood that the first limiting member 31 is configured to limit the position of the first end face 411 of the first rotor 41, and the second limiting member 32 is configured to limit the position of the second end face 411 of the second rotor 42, and the first limiting member 31 and the second limiting member 32 cooperate to make the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 have the third axial gap L3.

[0069] For example, in combination with Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 6 ,Figure 1 A structure diagram of the first limiting member in the compressor, Figure 7 For Figure 6 A cross-sectional view of the first limiting member along the P-P direction. The first limiting member 31 can include a first body part 311 and a first limiting part 312. The first body part 311 is sleeved on the first rotating shaft 20. For example, the first body part 311 can be provided with a first shaft hole 313, and the first limiting member 31 is sleeved on the first rotating shaft 20 through the first shaft hole 313. The first body part 311 can be a circular ring structure, and the first limiting part 312 is arranged around the outer surface periphery of the first body part 311. The first end surface 411 of the first rotor 41 can be provided with a first limiting groove 413, and the slot of the first limiting groove 413 faces the second rotor 42, or in other words, the first end surface 411 is provided with the first limiting groove 413 along the axial direction of the first rotating shaft 20. The first limiting part 312 is clamped in the first limiting groove 413, so that the first limiting part 312 can limit the first rotor 41 through the first limiting groove 413.

[0070] It can be understood that the first limiting part 312 is protrudingly arranged on the outer surface periphery of the first body part 311. When the first rotor 41 is sleeved on the first limiting member 31, the groove wall of the first limiting groove 413 of the first rotor 41 abuts against the first limiting part 312, and the first end surface 411 of the first rotor 41 cannot move relative to the first limiting member 31 under the limitation of the first limiting part 312 of the first limiting member 31, thereby realizing the limiting effect of the first limiting member 31 on the first end surface 411 of the first rotor 41.

[0071] The structure of the second limiting member 32 can be the same as that of the first limiting member 31. For example, the second limiting member 32 can include a second body part 321 and a second limiting part 322. The second body part 321 is sleeved on the first rotating shaft 20. For example, the second body part 321 can be provided with a second shaft hole 323, and the second limiting member 32 is sleeved on the first rotating shaft 20 through the second shaft hole 323. The second body part 321 can be a circular ring structure, and the second limiting part 322 is arranged around the outer surface periphery of the second body part 321. The third end surface 421 of the second rotor 42 can be provided with a second limiting groove 423, and the slot of the second limiting groove 423 faces the first rotor 41, or in other words, the third end surface 421 is provided with the second limiting groove 423 along the axial direction of the first rotating shaft 20. The second limiting part 322 is clamped in the second limiting groove 423, so that the second limiting part 322 can limit the second rotor 42 through the second limiting groove 423.

[0072] It can be understood that the second limiting part 322 is protrudingly arranged on the outer surface periphery of the second body part 321, when the second rotor 42 is sleeved on the second limiting part 32, the groove wall of the second limiting groove 423 of the second rotor 42 abuts against the second limiting part 322, and the second end surface 421 of the second rotor 42 cannot move relative to the second limiting part 32 under the limitation of the second limiting part 322 of the second limiting part 32, so that the second limiting part 32 realizes the limiting effect on the third end surface 421 of the second rotor 42.

[0073] In the embodiment of the application, the position of the first end surface 411 of the first rotor 41 is limited by the first limiting part 31, and the position of the third end surface 421 of the second rotor 42 is limited by the second limiting part 32, so that the first end surface 411 of the first rotor 41 and the third end surface 421 of the second rotor 42 are kept with the third axial gap.

[0074] Please refer to Figure 3 and Figure 8 , Figure 8 for Figure 1 the first rotor shaft, the second rotor shaft, the first rotor assembly and the second rotor assembly in the compressor are shown in the perspective structural view, the first rotor 41 comprises a first body part 414 and a plurality of first spiral blades 415, and the plurality of first spiral blades 415 are arranged around the outer surface periphery of the first body part 414. The first end surface 411 of the first rotor 41 comprises a first part located on the first body part 414 and a second part located on one first spiral blade 415 close to the second rotor 42, and the first limiting groove 413 is opened on the first part. It can be understood that the plurality of first spiral blades 415 are arranged in sequence on the first body part 414 from the direction of the first end surface 411 to the second end surface 412, and the end surface of the first first spiral blade 415 and the end surface of the first body part 414 close to the second rotor 42 are combined into the first end surface 411. The first limiting groove 413 is opened on the end surface of the first body part 414.

[0075] The second rotor 42 comprises a second body part 424 and a plurality of second spiral blades 425, and the plurality of second spiral blades 425 are arranged around the outer surface periphery of the second body part 424. The third end surface 421 of the second rotor 42 comprises a third part located on the second body part 424 and a fourth part located on one second spiral blade 425 close to the first rotor 42, and the second limiting groove 423 is opened on the third part. It can be understood that the plurality of second spiral blades 425 are arranged in sequence on the second body part 424 from the direction of the third end surface 421 to the fourth end surface 422, and the end surface of the first second spiral blade 425 and the end surface of the second body part 424 close to the first rotor 42 are combined into the third end surface 421. The second limiting groove 423 is opened on the end surface of the second body part 424.

[0076] In the embodiment of the present application, the first limiting part 312 can have a first side surface 3121 and a second side surface 3122 arranged opposite to each other, the first side surface 3121 being a surface of the first limiting part 312 close to the second limiting part 322, and the second side surface 3122 being a surface of the first limiting part 312 away from the second limiting part 322. The second limiting part 322 can have a third side surface 3221 and a fourth side surface 3222 arranged opposite to each other, the third side surface 3221 being a surface of the second limiting part 322 close to the first limiting part 312, and the fourth side surface 3222 being a surface of the second limiting part 322 away from the first limiting part 312.

[0077] The first side surface 3121 is arranged to protrude from one side of the first end surface 411 of the first rotor 41, and the third side surface 3221 is arranged to protrude from one side of the third end surface 421 of the second rotor 42. When the first rotor 41 and the second rotor 42 move towards each other to abut against each other, due to the fact that a part of the first limiting part 31 protrudes from the end surface of the first rotor 41 and a part of the second limiting part 32 protrudes from the end surface of the second rotor 42, the first end surface 411 of the first rotor 41 and the first end surface 411 of the first rotor 41 are arranged to be spaced apart from each other, so that the first rotor 41 and the second rotor 42 have a third axial gap L3 therebetween. The first part, the second part, the third part and the fourth part jointly form the third axial gap L3.

[0078] It should be noted that the positional relationship between the first limiting part 31 and the first rotor 41 and the positional relationship between the second limiting part 32 and the second rotor 42 are not limited to this. In some other embodiments, the first side surface 3121 is flush with the end surface of the part of the first part other than the part provided with the first limiting groove 413 in the direction perpendicular to the axial direction of the first rotating shaft 20. The third side surface 3221 is flush with the end surface of the part of the third part other than the part provided with the second limiting groove 423 in the direction perpendicular to the axial direction of the first rotating shaft 20.

[0079] The part of the first part other than the part provided with the first limiting groove 413 abuts against the part of the third part other than the part provided with the second limiting groove 423, and the second part and the fourth part are arranged to be spaced apart from each other to form the third axial gap L3 therebetween.

[0080] It can be understood that when the first limiting piece 31 and the first rotor 41 and the second limiting piece 32 and the second rotor 42 move together to the direction of approaching each other to the first limiting part 312 of the first limiting piece 31 and the second limiting part 322 of the second limiting piece 322 abut each other, because the end face of the other part of the first part except the first limiting groove 413 is flush with the first side face 3121 of the first limiting part 312 in the direction perpendicular to the axial direction of the first rotating shaft 20, and the end face of the other part of the third part except the second limiting groove 423 is flush with the third side face 3221 of the second limiting part 322 in the direction perpendicular to the axial direction of the first rotating shaft 20, so the end face of the other part of the first part except the first limiting groove 413 and the end face of the other part of the third part except the second limiting groove 423 abut each other. Compared with setting the first side face 3121 to protrude on one side of the other part of the first part except the first limiting groove 413 and setting the third side face 3221 to protrude on one side of the other part of the third part except the second limiting groove 423, the embodiment of the application can reduce the occupation of the internal space of the shell 10 by the connecting assembly 30.

[0081] It can also be understood that in the case that the length of each component of the first rotor assembly 40 is fixed, when the first limiting piece 31 and the first rotor 41 and the second limiting piece 32 and the second rotor 42 move together to the direction of approaching each other to the first limiting part 312 of the first limiting piece 31 and the second limiting part 322 of the second limiting piece 322 abut each other, the greater the gap between the end face of the other part of the first part of the first rotor 41 except the first limiting groove 413 and the end face of the other part of the third part of the second rotor 42 except the second limiting groove 423, the greater the overall length of the first rotor assembly 40, so that the volume of the internal space of the shell 10 occupied by the first rotor assembly 40 is greater.

[0082] The embodiment of the application sets the end face of the other part of the first part except the first limiting groove 413 to be flush with the first side face 3121 of the first limiting part 312 in the direction perpendicular to the axial direction of the first rotating shaft 20, and sets the end face of the other part of the third part except the second limiting groove 423 to be flush with the third side face 3221 of the second limiting part 322 in the direction perpendicular to the axial direction of the first rotating shaft 20, so that the first side face 3121 of the first limiting piece 31 and the third side face 3221 of the second limiting piece 32 abut each other, which maximizes the overall length of the first rotor assembly 40, thereby reducing the occupation of the internal space of the shell 10 by the first rotor assembly 40.

[0083] Moreover, the end face of the first body part 414 and the end face of the second body part 424 abut each other, and the end face of the first helical blade 415 and the end face of the first helical blade 425 are spaced apart from each other to form a third axial gap L3 between the second part and the fourth part. Compared with directly spacing apart the entire end face of the first rotor 41 and the entire end face of the second rotor 42 from each other, the embodiment of the present application can not only make the first helical blade 415 of the first rotor 41 and the second helical blade 425 of the second rotor 42 not interfere with each other, but also reduce the length of the first rotor assembly 40 in the housing 10 due to the setting of the third axial gap L3.

[0084] In other embodiments, as shown in Figure 9 Figure 9 For Figure 2 The second structure diagram of the first rotating shaft, the first rotor assembly and the connecting assembly is shown. The first rotor 41 is not provided with the first limiting slot 413, and the second rotor 42 is not provided with the second limiting slot 423. Instead, the first end face 411 of the first rotor 41 directly abuts against the face of the first limiting part 312 facing away from the second rotor 42, and the third end face 421 of the second rotor 42 directly abuts against the face of the second limiting part 322 facing away from the first rotor 41, so as to realize that the first rotor 41 and the second rotor 42 have the third axial gap L3. It can be understood that in the embodiment of the present application, when the first limiting part 31 and the second limiting part 32 abut against each other, the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 will not abut together due to the blocking of the first limiting part 312 of the first limiting part 31 and the second limiting part 322 of the second limiting part 32, or in other words, the first end face 411 of the first rotor 41 and the third end face 421 of the second rotor 42 always have a gap.

[0085] It should be noted that in other embodiments, a limiting slot can also be formed in the first rotor 41, and the first rotor 41 is clamped with the first limiting part 31 through the limiting slot; the third end face 421 of the second rotor 42 directly abuts against the second limiting part 322 in the second limiting part 32. Or a limiting slot is formed in the second rotor 42, and the second rotor 42 is clamped with the second limiting part 32 through the limiting slot; the first end face 411 of the first rotor 41 directly abuts against the first limiting part 312 in the first limiting part 31.

[0086] In the embodiment of the present application, the first limiting part 31 and the second limiting part 32 are separately formed into two parts, and in other embodiments, the first limiting part 31 and the second limiting part 32 can also be integrally formed into one part.

[0087] ​In the embodiment of the present application, the connecting assembly 30, the first rotor 41 and the second rotor 42 can rotate together in the housing 10 around the first rotating shaft 20. Due to the different pressures on the two sides of the first rotor 41 and the two sides of the second rotor 42 during rotation, axial forces in the axial direction of the first rotating shaft 20 are generated. The first rotor 41 and the second rotor 42 may move in the axial direction of the first rotating shaft 20 under the action of the axial forces. If the axial movement of the first rotor 41 and the second rotor 42 is too large, the first rotor 41 and the second rotor 42 may interfere with each other.

[0088] Based on this, the embodiment of the present application limits the first rotor 41 and the second rotor 42 through the connecting assembly 30, so that the gap between the first rotor 41 and the second rotor 42 is greater than the axial movement of the first rotor assembly 40 (including the first rotor 41 and the second rotor 42) in the axial direction of the first rotating shaft, thereby avoiding the occurrence of the above problems.

[0089] In the embodiment of the present application, the third axial gap L3 is greater than the first axial gap L1 and greater than the second axial gap L2, i.e. L3>L1 and L3>L2. The first axial gap L1 is the gap between the second end surface 412 of the first rotor 41 and the end surface of the housing 10 adjacent to the first rotor 41 in the axial direction of the first rotating shaft 20. The second axial gap L2 is the gap between the fourth end surface 422 of the second rotor 42 and the end surface of the housing 10 adjacent to the second rotor 42 in the axial direction of the first rotating shaft 20. Please continue to refer to Figure 2 、 Figure 4 and Figure 5 The connecting assembly 300 of the embodiment of the present application can further include a third limiting piece 33 and a fourth limiting piece 34. The third limiting piece 33 is configured to limit the distance between the second end surface 412 of the first rotor 41 and the housing 10, so that the second end surface 412 of the first rotor 41 has a first axial gap L1 with the housing 10. The fourth limiting piece 34 is configured to limit the distance between the fourth end surface 422 of the second rotor 42 and the housing 10, so that the fourth end surface 422 of the second rotor 42 has a second axial gap L2 with the housing 10.

[0090] The third limiting member 33 may include a third main body 331 and a third limiting part 332. The third main body 331 is sleeved on the first rotating shaft 20 and is disposed adjacent to the first main body 311. The third limiting part 332 is disposed around the periphery of the outer surface of the third main body 331. The third limiting part 331 may have a fifth side 3311 and a sixth side 3312. The fifth side 3311 is the side of the third limiting part 331 that faces away from the housing 10, and the sixth side 3312 is the side of the third limiting part 331 that is close to the housing 10. The fifth side 3311 abuts against the second end face 412 of the first rotor 41. The fourth limiting member 34 may include a fourth main body 341 and a fourth limiting part 342. The fourth main body 341 is sleeved on the first rotating shaft 20 and is disposed adjacent to the second main body 321. The fourth limiting part 342 is disposed around the periphery of the outer surface of the fourth main body 341. The fourth limiting part 341 may have a seventh side surface 3421 and an eighth side surface 3422. The seventh side surface 3421 is the side of the fourth limiting part 341 that is away from the housing 10, and the eighth side surface 3422 is the side of the fourth limiting part 341 that is close to the housing 10. The fourth limiting part 341 abuts against the second end face 412 of the first rotor 41.

[0091] In this embodiment of the invention, the structures of the third limiting member 33 and the fourth limiting member 34 can both be as follows: Figure 6 The structure of the first limiting member 31 shown is the same. The second end face 412 of the first rotor 41 and the fourth end face 422 of the second rotor 42 can also be provided with limiting grooves, and respectively engage with the third limiting member 33 and the fourth limiting member 34 through the limiting grooves.

[0092] like Figure 4 As shown, the second end face 421 of the first rotor 41 may be provided with a third limiting groove 416, the opening of the third limiting groove 416 facing the housing 10, or in other words, the second end face 421 is provided with the third limiting groove 416 along the axial direction of the first rotating shaft 20. The third limiting part 331 is engaged in the third limiting groove 416 so that the third limiting part 331 can limit the second end face 412 of the first rotor 41 through the third limiting groove 416. Understandably, the third limiting part 331 protrudes from the periphery of the outer surface of the third main body part 331. The first rotor 41 is simultaneously fitted onto the first limiting member 31 and the third limiting member 33. The first limiting member 31 is used to limit the first end face 411 of the first rotor 41, and the third limiting member 33 is used to limit the second end face 412 of the first rotor 42. When the first rotor 41 is fitted onto the third limiting member 33, the groove wall of the third limiting groove 416 of the first rotor 41 abuts against the third limiting part 331. The second end face 412 of the first rotor 41 cannot move relative to the third limiting member 33 under the restriction of the third limiting part 331 of the third limiting member 33, thereby realizing the limiting effect of the third limiting member 33 on the second end face 412 of the first rotor 41.

[0093] As shown in Figure 5 The fourth end surface 422 of the second rotor 42 can be provided with a fourth limiting groove 426, and the groove of the fourth limiting groove 426 faces the shell 10, or the fourth end surface 422 is provided with the fourth limiting groove 426 along the axial direction of the first rotating shaft 20. The fourth limiting part 342 is clamped in the fourth limiting groove 426, so that the fourth limiting groove 426 can limit the fourth limiting groove 426 of the second rotor 42.

[0094] It can be understood that the fourth limiting part 342 is protrudingly arranged on the outer surface of the fourth main body part 341, the second rotor 41 is sleeved on the second limiting part 32 and the fourth limiting part 34, the second limiting part 32 is used for limiting the third end surface 421 of the second rotor 42, and the fourth limiting part 34 is used for limiting the fourth end surface 422 of the second rotor 42. When the second rotor 42 is sleeved on the fourth limiting part 34, the groove wall of the fourth limiting groove 426 of the second rotor 42 abuts against the fourth limiting part 342, and the fourth end surface 422 of the second rotor 42 cannot move relative to the fourth limiting part 34 under the limitation of the fourth limiting part 341 of the fourth limiting part 34, so as to realize the limiting effect of the fourth limiting part 34 on the fourth end surface 422 of the second rotor 42.

[0095] In the embodiment of the application, the position of the second end surface 412 of the first rotor 41 is limited by the third limiting part 33, so that the second end surface 412 of the first rotor 41 and the shell 10 have a first axial gap L1, and the position of the fourth end surface 422 of the second rotor 42 is limited by the fourth limiting part 34, so that the fourth end surface 422 of the second rotor 42 and the shell 10 have a second axial gap L2.

[0096] Since the connecting assembly 30 rotates synchronously with the first rotor assembly 40, the connecting assembly 30 may be worn due to the axial friction with the first rotor assembly 40 during operation. Therefore, in the embodiment of the application, the connecting assembly 30 can be made of tin bronze material, that is, the connecting assembly 30 can be made of tin bronze material. The tin bronze material is a bronze material with tin as the main alloying element, and the tin content is generally between 3-14%. The material has the characteristics of corrosion resistance and wear resistance, has good mechanical properties and process performance, and can improve the wear resistance of the connecting assembly 30.

[0097] In the embodiment of the present application, in order to avoid the friction temperature being too high when the connecting assembly 30 and the first rotor assembly 40 generate shaft friction, the first shaft 20 and the connecting assembly 30 can be provided with oil supply channels, and the oil supply components located outside the shell 10 supply refrigeration oil or other oil to the oil supply channels for lubrication and cooling, reducing the friction between the connecting assembly 30 and the first rotor assembly 40, and ensuring the reliable operation of the compressor 200.

[0098] For example, in combination with Figure 2 and Figure 10 shown, Figure 10 for Figure 1 The structure diagram of the first shaft in the compressor shown. The connecting assembly 30 is provided with a plurality of first oil supply channels 34, one limiting piece can be provided with one or more first oil supply channels 36 (such as the first limiting piece 31, the second limiting piece 32, the third limiting piece 33 and the fourth limiting piece 34 are provided with the first oil supply channel 34), the first shaft 20 is provided with an oil supply main channel 211 along the axial direction of the first shaft 20, and is provided with a plurality of oil supply auxiliary channels 212 in communication with the oil supply main channel 211 along the second direction perpendicular to the axial direction of the first shaft 20, the oil supply main channel 211 and the plurality of oil supply auxiliary channels 212 together constitute the second oil supply channel 21, and the second oil supply channel 21 is in communication with the plurality of first oil supply channels 34 through the plurality of oil supply auxiliary channels 212. In actual operation, the oil supply components located in the shell 10 can input refrigeration oil or other oil into the oil supply main channel 211 of the first shaft 20, and the oil supply main channel 211 flows the refrigeration oil or other oil to the first shaft 20 and the connecting assembly 30 through the plurality of oil supply auxiliary channels 212, so as to lubricate and cool the contact surface of the first shaft 20 and the connecting assembly 30. The refrigeration oil or other oil can flow to the connecting assembly 20 and the first rotor assembly 40 through the plurality of first oil supply channels 34, so as to lubricate or cool the connecting assembly 20 and the first rotor assembly 40.

[0099] Please refer to Figure 1 and Figure 8 The compressor 200 in the embodiment of the present application can also include a second shaft 50 and a second rotor assembly 60, the second shaft 50 is installed in the shell 10, and the second shaft 50 is arranged in parallel with the first shaft 20 along the axial direction of the second shaft 50. The second rotor assembly 60 can include a third rotor 61 and a fourth rotor 62 coaxially arranged on the second shaft 50, the second shaft 50 is configured to drive the second rotor assembly 60 to rotate in the direction opposite to the rotation direction of the first rotor assembly 40, the third rotor 61 is engaged with the first rotor 41, and the fourth rotor 62 is engaged with the second rotor 42.

[0100] It can be understood that the first rotor assembly 20 can be a female rotor assembly, the second rotor assembly 60 can be a male rotor assembly, the second rotor assembly 60 as a male rotor assembly is a driving rotor assembly, and the first rotor assembly 40 as a female rotor assembly can be a driven rotor assembly. For example, the second rotating shaft 50 can be connected with a driving assembly such as a motor, the first rotating shaft 50 can be driven to rotate by the driving assembly, the first rotating shaft 50 drives the second rotor assembly 60 to rotate when rotating, and the second rotor assembly 60 drives the first rotor assembly 40 to rotate around the first rotating shaft 20 when rotating.

[0101] During the rotation of the first rotor assembly 40 and the second rotor assembly 60, the first rotor assembly 40 and the second rotor assembly 60 will move axially due to the axial force, and if the two rotors of the first rotor assembly 40 and the two rotors of the second rotor assembly 60 are misaligned and engaged, the two rotors of the first rotor assembly 40 and the two rotors of the second rotor assembly 60 will interfere with each other, resulting in the abrasion or even strangulation of the four rotors.

[0102] Therefore, in the embodiment of the present application, the end face of the third rotor 61 close to the fourth rotor 62 protrudes from the end face of the first rotor 41 close to the second rotor 42, and the end face of the fourth rotor 62 close to the third rotor 61 protrudes from the end face of the second rotor 42 close to the first rotor 41. The embodiment of the present application can ensure that the first rotor 41 and the fourth rotor 62 do not interfere with each other, and the second rotor 31 and the third rotor 61 do not interfere with each other.

[0103] It is understood that the third rotor 61 may have a fifth end face 611 and a sixth end face 612 arranged opposite to each other. The fifth end face 611 is the side closer to the fourth rotor 62, and the sixth end face 612 is the side away from the fourth rotor 62. The fifth end face 611 of the third rotor 61 is higher than the first end face 411 of the first rotor 41 in the axial direction of the second shaft 50, which ensures that a portion of the third rotor 61 is always located within the gap between the first rotor 41 and the second rotor 42. The fourth rotor 62 may have a seventh end face 621 and an eighth end face 622 arranged opposite to each other. The seventh end face 621 is the side closer to the third rotor 61, and the eighth end face 622 is the side away from the third rotor 61. The seventh end face 621 of the fourth rotor 62 is higher than the third end face 421 of the second rotor 42 in the axial direction of the second shaft 50, which ensures that a portion of the fourth rotor 62 is always located within the gap between the first rotor 41 and the second rotor 42. A portion of the third rotor 61 located between the first rotor 41 and the second rotor 42 (i.e., the portion protruding above the first end face 411 of the first rotor 41) can limit the seventh end face 621 of the fourth rotor 62, so that the seventh end face 621 of the fourth rotor 62 and the first end face 411 of the first rotor 41 always have a gap and do not interfere with each other; at the same time, a portion of the fourth rotor 62 located between the first rotor 41 and the second rotor 42 (i.e., the portion protruding above the third end face 421 of the second rotor 31) can limit the fifth end face 611 of the third rotor 61, so that the fifth end face 611 of the third rotor 61 and the third end face 421 of the second rotor 42 always have a gap and do not interfere with each other.

[0104] In this embodiment of the invention, the connecting component 30 limits the first rotor assembly 40, so that a third axial clearance L3 is maintained between the first rotor 41 and the second rotor 42 in the first rotor assembly 40. Moreover, in this embodiment of the invention, the adjacent end faces of the third rotor 61 and the fourth rotor 62 of the second rotor assembly 60 are respectively higher than the adjacent end faces of the first rotor 41 and the second rotor 42, thereby ensuring that the two pairs of rotors located at diagonal positions in the first rotor assembly 40 and the second rotor assembly 60 do not interfere with each other, and avoid the occurrence of rotor scratches and seizures.

[0105] like Figure 1 As shown, the fifth end face 611 of the third rotor 61 and the seventh end face 621 of the fourth rotor 62 are joined together, that is, the adjacent end faces of the third rotor 61 and the fourth rotor 62 are joined together. Compared with setting the third rotor 61 and the fourth rotor 62 to be spaced apart from each other, the embodiment of the present invention can reduce the overall length of the second rotor assembly 60, thereby reducing the space occupied by the second rotor assembly 60 in the internal space of the housing 10.

[0106] Of course, in some other embodiments, it is also possible to set the third rotor 61 and the fourth rotor 62 to be spaced apart from each other. As long as the adjacent end faces of the third rotor 61 and the fourth rotor 62 are both located within the gap between the first rotor 41 and the second rotor 42, the effect of ensuring that the two pairs of rotors located at opposite positions do not interfere with each other can also be achieved.

[0107] like Figure 3 As shown in the embodiment of the present invention, the distance between the fifth end face 611 of the third rotor 61 and the first end face 411 of the first rotor 41 in the axial direction of the second shaft 50 is d1, where d1 can be 0.2 mm, 0.3 mm, 0.4 mm, or other smaller values. The distance between the seventh end face 621 of the fourth rotor 62 and the third end face 421 of the second rotor 42 in the axial direction of the second shaft 50 is d2, where d2 can be 0.2 mm, 0.3 mm, 0.4 mm, or other smaller values. Wherein d1 = d2, and d1 + d2 = L3, that is, the distance between the fifth end face 611 of the third rotor 61 and the first end face 411 of the first rotor 41 in the axial direction of the second shaft 50 is equal to the distance between the seventh end face 621 of the fourth rotor 62 and the third end face 421 of the second rotor 42 in the axial direction of the second shaft 50, and the sum of the two distances is equal to the third axial gap L3 between the first rotor 41 and the second rotor 42.

[0108] In the actual operation of the compressor 200, the second shaft 50 and the second rotor assembly 60 will be affected by the axial force applied thereto and move in the axial direction of the second shaft 50.

[0109] When the third rotor 61 and the fourth rotor 62 move, assuming that the axial movement of the third rotor 61 in the housing 10 along the axial direction of the second shaft 50 towards the fourth rotor 62 is D1, the axial movement of the second rotor 62 towards the first rotor 41 is D2, the axial movement of the fourth rotor 62 in the housing 10 along the axial direction of the second shaft 50 towards the third rotor 61 is D3, and the axial movement of the first rotor 41 towards the second rotor 42 is D4, the second rotor assembly 60 must satisfy: L3 > D1 + D2, and L3 > D3 + D4. This ensures that the fifth end face 611 of the third rotor 61 will not interfere with the third end face 612 of the second rotor 42, and that the seventh end face 621 of the fourth rotor 62 will not interfere with the first end face 411 of the first rotor 41.

[0110] It can be understood that when the first rotor assembly 40 can produce axial movement and the second rotor assembly 60 can produce axial movement, when the two pairs of rotors located at the diagonal positions are axially moved in the direction of approaching each other, the sum of the axial movement amount is less than the gap between the first rotor 41 and the second rotor 42, the two pairs of rotors located at the diagonal positions can be made to always have a gap or just a gap of zero, thereby making the two groups of rotors located at the diagonal positions not interfere with each other.

[0111] In combination Figure 1 And 8 As shown in FIG. 1, the housing 10 also has an air inlet 11, a first exhaust port 12 and a second exhaust port 13 in communication with the accommodation space of the housing 10 for accommodating the first rotating shaft 20, the connecting assembly 30, the first rotor assembly 40, the second rotating shaft 50 and the second rotor assembly 60. The air inlet 11 is used to transmit the gas outside the housing 10 to the accommodation space inside the housing 10 when the first rotor assembly 40 and the second rotor assembly 60 are engaged in rotation. The first exhaust port 12 and the second exhaust port 13 are used to compress the gas in the accommodation space of the housing 10 to the outside of the housing 10 when the first rotor assembly 40 and the second rotor assembly 60 are engaged in rotation. Thus, the process of air intake, compression and exhaust of the compressor 200 can be achieved.

[0112] The air inlet 11 is located at the adjacent position of the first rotor 41, the second rotor 42, the third rotor 61 and the fourth rotor 62, and the first end face of the first rotor 41, the third end face of the second rotor 42, the fifth end face 611 of the third rotor 61 and the fourth rotor 621 are all adjacent to the air inlet 11. The first exhaust port 12 is located at the adjacent position of the first rotor 41, the third rotor 61 and the housing 10, and the second end face 412 of the first rotor 41 and the sixth end face 612 of the third rotor 61 are both adjacent to the first exhaust port 12. The second exhaust port 13 is located at the adjacent position of the second rotor 42, the fourth rotor 62 and the housing 10, and the fourth end face 422 of the second rotor 42 and the eighth end face 622 of the fourth rotor 62 are both adjacent to the second exhaust port 13.

[0113] It can be understood that the air inlet 11 is located at the middle position of the housing 10 in the axial direction of the first rotating shaft 30, and the first exhaust port 12 and the second exhaust port 13 are located at the two ends of the housing 10 in the axial direction of the first rotating shaft 20.

[0114] During the compression of the gas, the compressor 200 generates an axial force on the two pairs of rotor assemblies due to the different pressures of the gas at the air inlet and the exhaust port, forming the main load during the operation of the compressor. And the axial force is always directed from the exhaust port to the air inlet, and in the related art, the direction of increasing the thrust bearing on both sides of the rotating shaft is usually used to balance the axial force, but too many thrust bearings result in too much running loss and reduce the efficiency of the compressor.

[0115] Based on this, in the embodiment of the application, the helical direction of the first rotor 41 and the helical direction of the second rotor 42 are configured to be opposite directions, so that when the first rotor assembly 40 and the second rotor assembly 60 rotate and mesh with each other, opposite axial forces are generated between the first rotor 41 and the second rotor 42, which can also be understood as opposite axial flows generated between the first rotor 41 and the second rotor 42. Due to the symmetry of the axial force, the opposite axial forces generated between the first rotor 41 and the second rotor 42 can be almost offset.

[0116] It can be understood that, as described in the above application embodiment, the first rotor 41 can have a plurality of first helical leaves 415, the second rotor 42 has a plurality of second helical leaves 425, the number of the first helical leaves 415 is the same as the number of the second helical leaves 425, and the helical direction of the first helical leaves 415 and the helical direction of the second helical leaves 425 can be set to opposite directions, such as one being configured to be left-handed and the other being configured to be right-handed, to realize the opposite helical directions of the first rotor 41 and the second rotor 42.

[0117] Moreover, in the embodiment of the application, the helical direction of the third rotor 61 and the helical direction of the fourth rotor 62 are configured to be opposite directions, so that when the first rotor assembly 40 and the second rotor assembly 60 rotate and mesh with each other, opposite axial forces are generated between the third rotor 61 and the fourth rotor 62, which can also be understood as opposite axial flows generated between the third rotor 62 and the second rotor 42. Due to the symmetry of the axial force, the opposite axial forces generated between the first rotor 41 and the second rotor 42 can be almost offset. It can be understood that the third rotor 61 can have a plurality of third helical leaves 613, the fourth rotor 62 has a plurality of fourth helical leaves 623, the number of the fourth helical leaves 623 is the same as the number of the third helical leaves 613, and the helical direction of the third helical leaves 613 and the helical direction of the fourth helical leaves 623 can be set to opposite directions, such as one being configured to be left-handed and the other being configured to be right-handed, to realize the opposite helical directions of the third rotor 61 and the fourth rotor 62.

[0118] In the embodiment of the application, the third rotor 61 can be integrally formed with the second rotating shaft 50, and the fourth rotor 62 can be directly sleeved on the second rotating shaft 50 and fixedly connected with the second rotating shaft 50, such as the fourth rotor 62 can have an axial hole 624 matched with the second rotating shaft 50, and the axial hole 624 and the second rotating shaft 50 adopt a tight fit to enable the fourth rotor 63 to be sleeved and connected on the second rotating shaft 50. In other embodiments of the application, the third rotor 61 and the fourth rotor 62 can be integrally formed with the second rotating shaft 50, or the third rotor 61 and the fourth rotor 62 can be sleeved on the second rotating shaft 520.

[0119] In actual processing, due to the influence of the processing technology, the helical directions of the third rotor 61 and the fourth rotor 62 cannot be completely opposite, that is, the axial forces between the third rotor 61 and the fourth rotor 62 cannot be completely counteracted. Based on this, as shown in Figure 1 The compressor 200 of the embodiment of the present application also includes a thrust bearing 70, which is arranged on one side of the second rotating shaft 50. The thrust bearing 70 balances the small amount of residual axial force between the third rotor 61 and the fourth rotor 62, so that the third rotor 61 and the fourth rotor 62 are balanced in force.

[0120] The compressor 200 also includes a driving motor 80, which is arranged on the other side of the second rotating shaft 50. For example, the second rotating shaft 50 can have a first end portion 51 and a second end portion 52 arranged oppositely. The thrust bearing 70 is sleeved on the first end portion 51, and the second end portion 52 is in transmission connection with the driving motor 80. The driving motor 80 is configured to drive the second rotating shaft 50 to rotate to drive the second rotor assembly 60 to rotate, and drive the first rotor assembly 40 and the connecting assembly 30 to rotate together around the first rotating shaft 20.

[0121] In the embodiment of the present application, the end face of the third rotor 61 away from the fourth rotor 62 is flush with the end face of the first rotor 41 away from the second rotor 42 in a direction perpendicular to the axial direction of the second rotating shaft 50; and the end face of the fourth rotor 62 away from the third rotor 61 is flush with the end face of the second rotor 42 away from the first rotor 41 in a direction perpendicular to the axial direction of the second rotating shaft 50.

[0122] For example, as shown in Figure 8 The sixth end face 621 of the third rotor 61 is flush with the second end face 412 of the first rotor 41 in the first direction, that is, the exhaust end face of the third rotor 61 is flush with the exhaust end face of the first rotor 41. The eighth end face 62 of the fourth rotor 62 is flush with the fourth end face 422 of the second rotor 42 in the first direction, and the exhaust end face of the fourth rotor 62 is flush with the exhaust end face of the second rotor 41. In the case of axial force balance of the first rotor assembly 40 and the second rotor assembly 60, it can be ensured that the exhaust end faces of the yin and yang rotors are kept with a gap from the shell 10, and the gaps of the exhaust end faces of the yin and yang rotors from the shell 10 are consistent.

[0123] As shown in Figure 1 The shell 10 can include a casing 14, a first bearing seat 15, and a second bearing seat 16.

[0124] The first bearing seat 15 is arranged at the exhaust end face of the first rotor 41 and the third rotor 61, or part of the first bearing seat 15 is arranged at the second end face 412 of the first rotor 41, and part of the first bearing seat 15 is arranged at the sixth end face 412 of the third rotor 42. Moreover, the first bearing seat 15 is located between the first rotor 41 and the driving assembly 80, and the first bearing seat 15 is used for bearing the first end portion 51 of the second shaft 50 and the end portion of the first shaft 20 close to the first rotor 41.

[0125] The second bearing seat 16 is arranged at the exhaust end face of the second rotor 42 and the fourth rotor 62, or part of the second bearing seat 16 is arranged at the fourth end face 422 of the second rotor 42, and part of the first bearing seat 15 is arranged at the eighth end face 622 of the fourth rotor 62. The second bearing seat 13 is used for bearing the second end portion 52 of the second shaft 30 and the end portion of the second shaft 20 close to the third rotor 42.

[0126] The compressor 200 can further comprise a first radial bearing 91 and a second radial bearing 92, the first radial bearing 91 is sleeved on the first end portion 51 of the second shaft 50, and the outer surface of the first radial bearing 91 is in contact with the first bearing seat 15. For example, the first bearing seat 15 can be provided with a mounting groove, and the first radial bearing 91 is mounted in the mounting groove and in contact with the groove wall of the mounting groove.

[0127] The second radial bearing 92 is sleeved on the second end portion 52 of the second shaft 50, and the second radial bearing 92 is located at the side of the thrust bearing 70 close to the third rotor 42, and the outer surface of the thrust bearing 70 and the outer surface of the second radial bearing 92 are in contact with the second bearing seat 16. For example, the second bearing seat 16 can also be provided with a mounting groove, and the thrust bearing 70 and the second radial bearing 92 are mounted in the mounting groove and in contact with the groove wall of the mounting groove. The second radial bearing 92 and the first radial bearing 12 are used for balancing the radial force of the second shaft 50. The two ends of the first shaft 30 can be fixed on the first bearing seat 15 and the second bearing seat 13 respectively.

[0128] The third limiting piece 33 and the fourth limiting piece 34 of the embodiment can limit the exhaust end face of the first rotor 41, so that the first rotor 41 and the first bearing seat 15 have a gap, and the second rotor 42 and the second bearing seat 14 have a gap, which can ensure that the exhaust end face of the first rotor 41 does not collide with the end face of the first bearing seat 15, and the exhaust end face of the second rotor 42 does not collide with the end face of the second bearing seat 13, or the exhaust end faces of the two sets of male and female rotors are separated from the end faces of the bearing seats.

[0129] The compressor 200 in one or more of the above embodiments can be applied to an air conditioner.

[0130] The present application also provides an air conditioner comprising the compressor 200 defined in combination with one or more of the above embodiments.

[0131] The compressor and air conditioner provided by the embodiments of the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment descriptions are only used to help understand the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and the above description should not be understood as a limitation on the present application.

Claims

1. A compressor, characterized in that, include: case; The first rotating shaft is installed inside the housing; A connecting component is fitted onto the first rotating shaft; as well as A first rotor assembly, comprising a first rotor and a second rotor coaxially disposed on the connecting assembly, wherein the connecting assembly is capable of supporting the first rotor and the second rotor to rotate together around the first rotating shaft; The connecting component is further configured to limit the relative positions of the first rotor and the second rotor so that there is a gap between the first rotor and the second rotor; The first rotor has a first axial gap at its end face away from the second rotor and at its end face near the first rotor. The second rotor has a second axial gap at its end face away from the first rotor and at its end face near the second rotor. The connecting assembly is configured to limit the gap between the first rotor and the second rotor to be greater than the first axial gap, and the gap between the first rotor and the second rotor to be greater than the second axial gap. Alternatively, the connecting assembly includes a first limiting member and a second limiting member, both sleeved on the first rotating shaft and both rotatable around the first rotating shaft. The first limiting member is configured to limit the position of the first rotor near the end face of the second rotor, and the second limiting member is configured to limit the position of the second rotor near the end face of the first rotor.

2. The compressor according to claim 1, characterized in that, The compressor also includes: The second rotating shaft is installed inside the housing; and The second rotor assembly includes a third rotor and a fourth rotor coaxially mounted on a second rotating shaft. The second rotating shaft is configured to drive the second rotor assembly to rotate in a direction opposite to the rotation direction of the first rotor assembly. The third rotor meshes with the first rotor, and the fourth rotor meshes with the second rotor.

3. The compressor according to claim 2, characterized in that, The end face of the third rotor near the fourth rotor protrudes beyond the end face of the first rotor near the second rotor, and the end face of the fourth rotor near the third rotor protrudes beyond the end face of the second rotor near the first rotor, so that the first rotor and the fourth rotor do not interfere with each other, and the second rotor and the third rotor do not interfere with each other.

4. The compressor according to claim 3, characterized in that, The third rotor is engaged with the adjacent end face of the fourth rotor.

5. The compressor according to claim 4, characterized in that, The distance between the end face of the third rotor near the fourth rotor and the end face of the first rotor near the second rotor in the axial direction of the second shaft is d1, and the distance between the end face of the fourth rotor near the third rotor and the end face of the second rotor near the first rotor in the axial direction of the second shaft is d2. The second rotor assembly is configured to satisfy: d2=d1.

6. The compressor according to claim 3, characterized in that, The gap between the first rotor and the second rotor is L3. The axial movement of the third rotor within the housing along the axial direction of the second shaft toward the direction closer to the fourth rotor is D1. The axial movement of the second rotor toward the direction closer to the first rotor is D2. The axial movement of the fourth rotor within the housing along the axial direction of the second shaft toward the direction closer to the third rotor is D3. The axial movement of the first rotor toward the direction closer to the second rotor is D4. The second rotor assembly is configured to satisfy: L3≥D1+D2 and L3≥D3+D4.

7. The compressor according to claim 5, characterized in that, An air intake port is provided at an adjacent position of the first rotor, the second rotor, the third rotor and the fourth rotor; a first exhaust port is provided at an adjacent position of the first rotor, the third rotor and the housing; and a second exhaust port is provided at an adjacent position of the second rotor, the fourth rotor and the housing.

8. The compressor according to claim 7, characterized in that, The helical direction of the first rotor is opposite to that of the second rotor, and the helical direction of the third rotor is opposite to that of the fourth rotor.

9. The compressor according to claim 8, characterized in that, The third rotor is integrally formed with the second rotating shaft, and the fourth rotor has a shaft hole that mates with the second rotating shaft, with the shaft hole and the second rotating shaft being tightly fitted.

10. The compressor according to claim 8, characterized in that, The compressor further includes a thrust bearing disposed on one side of the second rotating shaft and a motor disposed on the other side of the second rotating shaft. The motor is configured to drive the second rotating shaft to rotate, so that the second rotor assembly follows the second rotating shaft to rotate and drives the first rotor assembly and the connecting assembly to rotate together around the first rotating shaft.

11. The compressor according to claim 10, characterized in that, The end face of the third rotor away from the fourth rotor is flush with the end face of the first rotor away from the second rotor in a direction perpendicular to the axial direction of the second shaft; the end face of the fourth rotor away from the third rotor is flush with the end face of the second rotor away from the first rotor in a direction perpendicular to the axial direction of the second shaft.

12. The compressor according to claim 1, characterized in that, The first rotor has a first limiting groove on its end face near the second rotor along the axial direction of the first rotating shaft. The first limiting member includes a first main body and a first limiting part. The first main body is sleeved on the first rotating shaft, and the first limiting part is arranged around the periphery of the outer surface of the first main body and is engaged in the first limiting groove. The second rotor has a second limiting groove on its end face near the first rotor along the axial direction of the first rotating shaft. The second limiting member includes a second main body and a second limiting part. The second main body is sleeved on the first rotating shaft and is disposed adjacent to the first main body. The second limiting part is disposed around the periphery of the outer surface of the second main body and is engaged in the second limiting groove.

13. The compressor according to claim 12, characterized in that, The end face of the first limiting part near the second limiting part protrudes on the side of the end face of the first rotor near the second rotor, and the end face of the second limiting part near the first limiting part protrudes on the side of the end face of the second rotor near the first rotor.

14. The compressor according to claim 12, characterized in that, The distance between the end face of the first rotor near the second rotor and the end face of the second rotor near the first rotor in the axial direction of the first rotor shaft gradually increases from the axis of the first rotor assembly to the outer periphery of the first rotor assembly.

15. The compressor according to claim 11, characterized in that, The first limiting member includes a first main body and a first limiting part. The first main body is sleeved on the first rotating shaft, and the first limiting part is arranged around the periphery of the outer surface of the first main body. The side of the first limiting part that is away from the second rotor abuts against the end face of the first rotor that is close to the second rotor. The second limiting member includes a second main body and a second limiting part. The second main body is sleeved on the first rotating shaft and is disposed adjacent to the first main body. The second limiting part is disposed around the periphery of the outer surface of the second main body. The side of the second limiting part that is away from the first rotor abuts against the end face of the second rotor that is close to the first rotor.

16. The compressor according to claim 15, characterized in that, The connecting assembly further includes a third limiting member and a fourth limiting member, the third limiting member being configured to limit the distance between the end face of the first rotor away from the second rotor and the housing, and the fourth limiting member being configured to limit the distance between the end face of the second rotor away from the first rotor and the housing.

17. The compressor according to claim 16, characterized in that, The third limiting member includes a third main body and a third limiting part. The third main body is sleeved on the first rotating shaft and is disposed adjacent to the first main body. The third limiting part is disposed around the periphery of the outer surface of the third main body. The third limiting part abuts against the end face of the first rotor that is away from the second rotor. The fourth limiting member includes a fourth main body and a fourth limiting part. The fourth main body is sleeved on the first rotating shaft and is disposed adjacent to the second main body. The fourth limiting part is disposed around the periphery of the outer surface of the fourth main body. The fourth limiting part abuts against the end face of the second rotor opposite to the first rotor.

18. The compressor according to claim 16, characterized in that, A third limiting groove is provided on the end face of the first rotor away from the second rotor along the axial direction of the first rotating shaft. The third limiting member includes a third main body and a third limiting part. The third main body is sleeved on the first rotating shaft and is disposed adjacent to the first main body. The third limiting part is disposed around the periphery of the outer surface of the third main body and is engaged in the third limiting groove. The second rotor has a fourth limiting groove on its end face away from the first rotor along the axial direction of the first rotating shaft. The fourth limiting member includes a fourth main body and a fourth limiting part. The fourth main body is sleeved on the first rotating shaft and is disposed adjacent to the second main body. The fourth limiting part is disposed around the periphery of the outer surface of the fourth main body and is engaged in the fourth limiting groove.

19. The compressor according to any one of claims 1 to 11, characterized in that, The connecting components are made of tin bronze.

20. The compressor according to any one of claims 1 to 11, characterized in that, Both the first rotating shaft and the connecting assembly are provided with oil supply channels, and the oil supply channel on the first rotating shaft is connected to the oil supply channel on the connecting assembly.

21. An air conditioner, characterized in that, Includes the compressor as described in any one of claims 1 to 20.

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