CN117052657A

CN117052657A - Compressor

Info

Publication number: CN117052657A
Application number: CN202310984754.4A
Authority: CN
Inventors: 请求不公布姓名; 郭威利
Original assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Current assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-11-14

Abstract

The application provides a compressor, which comprises an orbiting scroll, a supporting piece and a sealing assembly, wherein the sealing assembly is at least partially positioned between the orbiting scroll and the supporting piece, the sealing assembly comprises a first sealing part, a second sealing part and a plate, the plate is positioned between the orbiting scroll and the supporting piece, the first sealing part and the second sealing part are respectively positioned at two sides of the plate, the first sealing part is positioned between the plate and the orbiting scroll, and the second sealing part is positioned between the plate and the supporting piece; the first sealing part at least comprises a wear-resistant part, the second sealing part at least comprises an elastic part, and the hardness of the wear-resistant part is larger than that of the elastic part. According to the compressor, the sealing assembly comprising the first sealing part, the second sealing part and the plate is arranged, the first sealing part between the plate and the movable vortex piece at least comprises the wear-resisting part, the second sealing part between the plate and the supporting piece at least comprises the elastic part, and the wear of the sealing part can be reduced while the sealing performance is ensured by the cooperation of the wear-resisting part, the elastic part and the plate, so that the sealing durability is improved.

Description

Compressor

Technical Field

The application belongs to the field of compressors, and particularly relates to a scroll compressor.

Background

The compressor is an important component in a vapor compression refrigeration system and functions to compress a low pressure, low temperature refrigerant gas into a high pressure, high temperature refrigerant gas. The scroll compressor is one of the compressors, and is widely applied by virtue of the advantages of energy conservation, environmental protection and the like.

In the scroll compressor, pressure is generated in a compression chamber during the process of compressing a refrigerant, and axial force is generated to separate the movable scroll from the fixed scroll, so that a gap is generated, and a compression medium leaks. In the related art, by providing an intermediate plate between the movable scroll and the supporting member, and simultaneously providing sealing members at both sides of the intermediate plate, back pressure sealing of the scroll compressor is achieved, but the movable scroll is in a moving state during compression of a refrigerant of the compressor, which may cause serious friction damage to the sealing members.

Disclosure of Invention

The present application aims to provide a compressor with improved sealing durability.

In order to achieve the above object, the present application provides a compressor including an orbiting scroll, a bearing and a seal assembly at least partially disposed between the orbiting scroll and the bearing, the seal assembly including a first seal portion, a second seal portion and a plate disposed between the orbiting scroll and the bearing, the first seal portion and the second seal portion being disposed on both sides of the plate, respectively, the first seal portion being disposed between the plate and the orbiting scroll, the second seal portion being disposed between the plate and the bearing;

the first sealing part at least comprises a wear-resistant part, the second sealing part at least comprises an elastic part, and the hardness of the wear-resistant part is larger than that of the elastic part.

According to the compressor, the sealing assembly comprising the first sealing part, the second sealing part and the plate is arranged, the first sealing part between the plate and the movable vortex piece at least comprises the wear-resisting part, the second sealing part between the plate and the supporting piece at least comprises the elastic part, and the wear of the sealing part can be reduced while the sealing performance is ensured by the cooperation of the wear-resisting part, the elastic part and the plate, so that the sealing durability is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 is a perspective view of a compressor according to an embodiment of the present application;

FIG. 2 is an exploded view of a compressor according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a compressor according to an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIGS. 5-7 are block diagrams of various embodiments of seal assemblies in accordance with the present application;

fig. 8 to 9 are structural views showing the present application provided with a protrusion;

FIG. 10 is a block diagram of a first seal portion including a wear portion and an elastomeric portion in accordance with the present application;

fig. 11 is a structural view of a compressor provided with an oil return passage according to an embodiment of the present application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The compressor is an important component in a vapor compression refrigeration system and functions to compress a low pressure, low temperature refrigerant gas into a high pressure, high temperature refrigerant gas. Referring to fig. 1 to 11, the present embodiment proposes a compressor including a compression mechanism, a driving mechanism and a housing assembly, the compression mechanism includes a movable scroll 1 and a fixed scroll 6, the fixed scroll 6 is engaged with the movable scroll 1, the movable scroll 1 includes a first end plate 11 and a first wrap 12, the first wrap 12 is connected with the first end plate 11, the fixed scroll 6 includes a second end plate 61 and a second wrap 62, the second wrap 62 is connected with the second end plate 61, the first wrap 12 extends from the first end plate 11 toward the second end plate 61, and the second wrap 62 extends from the second end plate 61 toward the first end plate 11. The compressor has a compression chamber V located between the fixed scroll 6 and the orbiting scroll 1, more specifically, between the first and second end plates 11 and 61, and at least partially between the first and second wrap 12 and 62. In other words, the first wrap 12 and the second wrap 62 intermesh to form a series of compression pockets V including a central compression pocket V1 located innermost, the second end plate 61 having at least one exhaust port 61a, the at least one exhaust port 61a being communicable with the central compression pocket V1.

In addition, the compressor includes a discharge cover 7 and a discharge valve EV which is connected to the fixed scroll 6, and which can open or close the discharge hole 61a during compression of the refrigerant by the compressor. A discharge cover 7 is connected to the fixed scroll 6, and the compressor has a discharge chamber HP communicable with the compression chamber V.

In addition, the housing assembly comprises a casing 8, the drive mechanism comprises a motor 9 and a shaft 4, the motor 9 is located in the casing 8, the motor 9 comprises a stator 91 and a rotor 92, the stator 91 is connected with the casing 8, the rotor 92 is connected with the shaft 4, and the shaft 4 is rotatably connected with the first end plate 11 of the movable scroll 1. Specifically, the shaft 4 includes a main body 41 and an eccentric portion 42, the eccentric portion 42 is connected to the main body 41, the rotor 92 is connected to the main body 41, the eccentric portion 42 is eccentrically disposed with respect to an axis line of the main body 41, and the compressor includes a first bearing B1, and the first bearing B1 connects the eccentric portion 42 and the first end plate 11. When the compressor compresses the refrigerant, the stator 91 is energized, and the rotor 92 is rotated by the force of the magnetic field to drive the shaft 4 to rotate, and the eccentric portion 42 of the shaft 4 is eccentrically disposed with respect to the main body portion 41, so that the shaft 4 drives the orbiting scroll 1 to perform a planar motion with respect to the fixed scroll 6. The refrigerant is sucked into the compression chamber V and then gradually compressed from the outermost side to the innermost side of the central compression chamber V1, the pressure of the refrigerant becomes larger and larger, when the pressure of the refrigerant in the compression chamber V communicated with the discharge hole 61a reaches the discharge pressure of the discharge valve EV, the discharge valve EV is opened, and the refrigerant is discharged from the compression chamber V to the discharge chamber HP, so that the inside of the discharge chamber HP is at a high temperature and a high pressure, and when the pressure of the refrigerant in the compression chamber V communicated with the discharge hole 61a does not reach the discharge pressure of the discharge valve EV yet, the discharge valve EV closes the discharge hole 61a. The discharge cover 7 has an air outlet 70, and the high-temperature and high-pressure refrigerant introduced into the discharge chamber HP is finally discharged from the air outlet 70 to the compressor and introduced into the piping of the heat exchange system.

The compressor further comprises a support 2, the support 2 being located on the backside of the orbiting scroll 1, i.e. the side remote from the fixed scroll 6, the fixed scroll 6 being located on the side of said first end plate 11 facing away from the support 2, in other words the orbiting scroll 1 being located between the support 2 and the fixed scroll 6. The bearing 2 is connected to the housing 8, the bearing 2 is at least partially located in said housing 8, and the bearing 2 supports the orbiting scroll 1, the bearing 2 may be located entirely within the housing 8, as shown in fig. 3, or may be partially located within the housing 8, not shown. The pressure generated in the compression process of the refrigerant can generate acting force for separating the movable scroll 1 from the fixed scroll 6, once the separation distance between the movable scroll 1 and the fixed scroll 6 reaches a certain degree, the seal between the movable scroll 1 and the fixed scroll 6 is invalid, so that the refrigerant leaks, the compression efficiency of the compressor is further influenced, and even the normal operation of the compressor is influenced. Therefore, the back side of the movable scroll 1, namely, the side far away from the fixed scroll 6, is provided with the back pressure cavity C1, the back pressure cavity C1 is positioned between the supporting piece 2 and the movable scroll 1, and the back pressure cavity C1 is provided, so that the pressure in the back pressure cavity C1 can generate a reaction force on the movable scroll 1 to resist the separation of the movable scroll 1 and the fixed scroll 6, and the normal operation and the effective operation of the compressor are ensured.

Referring again to fig. 2, 3 in combination, in order to ensure the relative tightness of the back pressure chamber C1, in this embodiment, the compressor includes a seal assembly 3 and a shaft seal 5, the seal assembly 3 is at least partially located between the movable scroll 1 and the support 2, and the seal assembly 3 is in sealing connection with the support 2 and the movable scroll 1; the shaft 4 passes through the support 2, said shaft seal 5 being located between said shaft 4 and the support 2, said shaft seal 5 sealing connecting the shaft 4 and the support 2. By means of the seal assembly 3 and the shaft seal 5, the back pressure chamber C1 is located between the seal assembly 3 and the shaft seal 5, i.e. the back pressure chamber C1 encloses between the bearing 2, the seal assembly 3, the orbiting scroll 1, the shaft 4 and the shaft seal 5.

The support member 2 is fixed relative to the casing 8, and the orbiting scroll 1 moves relative to the support member 2 during operation of the compressor, so that a good orbiting seal performance between the orbiting scroll 1 and the support member 2 is required to ensure the effectiveness of the seal. To this end, referring again to fig. 3 to 10, in the present embodiment, the seal assembly 3 includes a first seal portion 31, a second seal portion 32 and a plate 33, the plate 33 is located between the orbiting scroll 1 and the support 2, the first seal portion 31 and the second seal portion 32 are located on both sides of the plate 33, respectively, the first seal portion 31 is located on a side of the plate 33 close to the orbiting scroll 1, and the second seal portion 32 is located on a side of the plate 33 close to the support 2, that is, a seal between the orbiting scroll 1 and the plate 33 is achieved by the first seal portion 31, and a seal between the plate 33 and the support 2 is achieved by the second seal portion 32.

The compressor needs to realize the compression of the refrigerant through the relative movement of the movable scroll 1 relative to the fixed scroll 6, so the movable scroll 1 is a relatively moving component, and the action of the acting force in the compression cavity V and the back pressure cavity C1 can float in the moving process, so a certain clearance needs to be reserved between the fixed scroll 6 and the supporting piece 2 for the floating of the movable scroll 1 to meet the floating requirement of the movable scroll 1, and the tightness between the supporting piece 2 and the movable scroll 1 is also ensured, therefore, the second sealing part 32 at least comprises an elastic part 3b, and the elastic part 3b of the second sealing part 32 is in rebound when the movable scroll 1 approaches to the fixed scroll 6, and still keeps a tight abutting state with the supporting piece 2 and the plate 33; when the movable scroll 1 approaches toward the support 2, the elastic portion 3b of the second seal portion 32 is pressed to be in a tight contact with the support 2 and the plate 33, that is, the tightness between the plate 33 and the support 2 can be ensured during the relative floating of the movable scroll 1 by the elastic portion 3b of the second seal portion 32. In addition, the elastic force of the elastic portion 3b of the second sealing portion 32 can also ensure that the plate 33 is propped against the moving scroll 1, so that the sealing performance between the moving scroll 1 and the supporting member 2 is improved, the relative tightness of the back pressure cavity C1 is ensured, the back pressure adjusting function of the compressor is improved, the friction between the moving scroll 1, the fixed scroll 6 and the supporting member 2 is reduced, the moving scroll 1, the fixed scroll 6 and the supporting member 2 are protected, and the vibration and noise reducing effect is achieved.

Furthermore, the compressor comprises a positioning member p connecting said plate 33 and at least one of said support 2 and the orbiting scroll 1. In other words, the plate 33 is connected to at least one of the orbiting scroll 1 via the positioning member p and the bearing member 2 to achieve the positioning effect during assembly, and also to prevent the plate 33 from moving circumferentially, i.e., to limit the circumferential movement and circumferential rotation of the plate 33, but not to limit the plate 33 in the axial direction (i.e., in the thickness direction of the plate 33) to allow the plate 33 to float axially to achieve the self-adjusting sealing effect. During the compression of the refrigerant by the compressor, the movable scroll 1 and the plate 33 move relatively, so that it is necessary to achieve wear resistance in addition to sealing, the first sealing portion 31 includes at least a wear-resistant portion 3a, and the hardness of the wear-resistant portion 3a is greater than that of the elastic portion 3b. In the running process of the compressor, the back pressure cavity C1 is provided with lubricating oil, when the lubricating oil is positioned at the position of the wear-resisting part 3a, due to the movement of the movable vortex piece 1 relative to the plate 33, after a certain relative speed exists between the movable vortex piece 1 and the plate 33, the lubricating oil enters into a gap between the wear-resisting part 3a and the relative movement surface to form oil film sealing, so that the sealing between the movable vortex piece 1 and the plate 33 is realized.

In this embodiment, by providing the seal assembly 3 including the first seal portion 31, the second seal portion 32 and the plate 33, the first seal portion 31 located between the plate 33 and the movable scroll 1 includes at least the wear-resistant portion 3a, the second seal portion 32 located between the plate 33 and the support 2 includes at least the elastic portion 3b, the hardness of the wear-resistant portion 3a is greater than that of the elastic portion 3b, and by the elastic force of the elastic portion 3b, the wear-resistant performance of the wear-resistant portion 3a, and the distribution positions of the first seal portion 31, the second seal portion 32 and the plate 33, the movable seal requirement between the movable scroll 1 and the support 2 is achieved, the relative tightness of the back pressure chamber C1 is ensured, and the floating requirement of the movable scroll 1 and the protection performance of the movable scroll 1 can be satisfied, the use performance of the seal assembly 3 is improved, and the working performance of the compressor is further improved.

Specifically, referring again to fig. 5 to 10, the first seal portion 31 is in contact with both the orbiting scroll 1 and the plate 33, the second seal portion 32 is in contact with both the bearing 2 and the plate 33, and force transmission among the orbiting scroll 1, the seal assembly 3 and the bearing 2 is achieved by the contact, thereby achieving adaptive adjustment of the seal assembly 3 according to the interaction force of the back pressure chamber C1 and the compression chamber V. Wherein the first sealing portion 31 and the second sealing portion 32 are both in an annular structure, the plate 33 has a first surface 33a and a second surface 33b along the thickness direction F, the first surface 33a faces the first sealing portion 31, and the first surface 33a is in contact with the first sealing portion 31; the second surface 33b faces the second sealing portion 32, and the second surface 33b contacts the second sealing portion 32. In this embodiment, in order to reduce friction, slow down wear speed and extend service life, the first contact surface 3a1 and the first surface 33a are smooth surfaces.

Further, the wear-resistant portion 3a is in contact with the plate 33, that is, the orbiting scroll 1 is in sliding contact with the plate 33 through the wear-resistant portion 3a, the production and material costs of the orbiting scroll 1 are higher than those of the wear-resistant portion 3a and the plate 33, and the wear-resistant portion 3a of the plate 33 and the first seal 31 can effectively protect the orbiting scroll 1 from abrasion damage or wear damage. Wherein the wear-resistant part 3a is at least partially a plastic part, and the hardness of the wear-resistant part 3a is H ₁ Wherein 55HD is less than or equal to H ₁ The wear-resistant part 3a is made of one or more of polytetrafluoroethylene, polyphenylene sulfide, polyether-ether-ketone, paraformaldehyde resin and polyimide, and the wear-resistant part is made of the same or less than or equal to 65 HD. The elastic portion 3b is at least partially a rubber material, and the hardness of the elastic portion 3b is H ₂ Wherein 50HA is less than or equal to H ₂ And less than or equal to 85HA, wherein the material of the elastic part 3b comprises rubber. In this embodiment, the thickness of the plate 33 is not specifically limited, and the plate 33 may be designed according to practical requirements, and the plate 33 is also a wear-resistant member, and is made of a wear-resistant material, and may be a wear-resistant metal sheet (or plate), or the like.

Referring again to fig. 5 to 10, the orbiting scroll 1 has a first mounting groove G1 opened toward the plate 33, and the first sealing portion 31 is at least partially located in the first mounting groove G1, specifically, the first mounting groove G1 is located in the first end plate 11. Further, the support 2 has a second mounting groove G2 open toward the plate 33, as shown in fig. 5; alternatively, the plate 33 has a second mounting groove G2 open toward the support 2, and the second sealing portion 32 is at least partially located in the second mounting groove G2, as shown in fig. 6; alternatively, the support member 2 may have a second mounting groove G2 open toward the plate 33, and the plate 33 may also have a second mounting groove G2 open toward the support member 2, and each second mounting groove G2 may have a second seal portion 32 mounted therein, as shown in fig. 7, but of course, the same second seal portion 32 may be partially located in the second mounting groove G2 of the support member 2 and partially located in the second mounting groove G2 of the plate 33, which is not shown in the drawings.

Referring again to fig. 2, 5 and 6, the wear-resistant portion 3a includes a first contact surface 3a1, the first contact surface 3a1 contacts the plate 33, and the first contact surface 3a1 is an annular plane for increasing the sealing surface and thus improving the sealing performance. Further, the elastic portion 3b includes a second contact surface 3b1, and at least one of the orbiting scroll 1 and the bearing 2 is in contact with the second contact surface 3b 1. In other words, the first sealing portion 31 may include the elastic portion 3b, and the following description will be made with reference to some embodiments:

as shown in fig. 5, in one embodiment, the first sealing portion 31 includes the wear-resistant portion 3a, and the second sealing portion 32 includes the elastic portion 3b. The wear-resistant portion 3a is located between the plate 33 and the orbiting scroll 1, the wear-resistant portion 3a further includes a third contact surface 3a2, the third contact surface 3a2 contacts with the orbiting scroll 1, and the third contact surface 3a2 and the first contact surface 3a1 are at least partially distributed along the thickness direction F of the plate 33, wherein the cross section of the first sealing portion 31 is rectangular, specifically the cross section of the wear-resistant portion 3a is rectangular. The elastic part 3b is located between the plate 33 and the support 2, the second contact surface 3b1 of the elastic part 3b is in contact with the support 2, the elastic part 3b further comprises a fourth contact surface 3b2, the fourth contact surface 3b2 is in contact with the plate 33, and the second contact surface 3b1 and the fourth contact surface 3b2 are at least partially distributed along the thickness direction F of the plate 33; the cross section of the second sealing portion 32 is any one of an O-shape, a C-shape, and an X-shape, specifically, the cross section of the elastic portion 3b is any one of an O-shape, a C-shape, and an X-shape, and the elastic portion 3b may be in a structure of an elastic claw, which is not shown in the figure. Of course, the cross section of the elastic portion 3b may take other shapes, and this is not an example since there are many possible embodiments. The cross section is a plane passing through the center line of the sealing portions 31, 32.

Referring to fig. 8 and 9, in the above embodiment, in order to prevent the elastic portion 3b of the second sealing portion 32 from being separated from the second mounting groove G2 and being pressed to cause irreversible deformation, the compressor includes the protrusion 331, the protrusion 331 extends into the second mounting groove G2, the protrusion 331 abuts against the elastic portion 3b along the thickness direction F of the plate 33, and the protrusion 331 is provided to ensure that the elastic portion 3b is always limited in the second mounting groove G2, so that the problem of irreversible deformation caused by being separated from the second mounting groove G2 due to pressing does not occur, and the sealing efficiency is ensured. In addition, in order to ensure that the back pressure does not leak from the second seal portion 32, the protrusion 331 has a closed annular structure, that is, the protrusion 331 and the elastic portion 3b can abut against each other in the circumferential direction thereof to form an effective seal. Wherein the protrusion 331 is located on one of the plate 33 and the support 2, and when the second mounting groove G2 is located on the support 2, the protrusion 331 is located on the plate 33, and the protrusion 331 on the plate 33 extends to the second mounting groove G2 of the support 2 to abut against the elastic portion 3b therein, as shown in fig. 8; when the second mounting groove G2 is located on the plate 33, the protrusion 331 is located on the support 2, and the protrusion 331 on the support 2 extends to the second mounting groove G2 of the plate 33 to abut the elastic portion 3b therein, as shown in fig. 9; the structure forms shown in fig. 8 and 9 can also be included.

As shown in fig. 10, in another embodiment, in addition to the embodiment shown in fig. 5 to 9, the first sealing portion 31 further includes an elastic portion 3b, and the elastic portion 3b is in contact with or connected to the wear-resistant portion 3a of the first sealing portion 31, where "connection" may mean that the elastic portion 3b and the wear-resistant portion 3a may be formed as a single piece during the production process, or may be connected by means of adhesion, clamping, or the like during the assembly process. In this embodiment, the elastic portion 3b of the first seal portion 31 abuts against the wear-resistant portion 3a, the first contact surface 3a1 of the wear-resistant portion 3a of the first seal portion 31 contacts the plate 33, and the second contact surface 3b1 of the elastic portion 3b of the first seal portion 31 abuts against the orbiting scroll 1; the second contact surface 3b1 of the elastic portion 3b of the second seal portion 32 is in contact with the support 2, and the fourth contact surface 3b2 of the elastic portion 3b of the second seal portion 32 is in contact with the plate 33.

Of course, in other embodiments, the second sealing portion 32 may further include a wear-resistant portion 3a, the elastic portion 3b of the second sealing portion 32 abuts against or is connected to the wear-resistant portion 3a of the second sealing portion 32, and the second contact surface 3b1 of the elastic portion 3b of the second sealing portion 32 contacts the support 2, which is not shown in the drawing.

Referring to fig. 3 again, in order to adaptively adjust the pressure in the compression chamber V and the back pressure chamber C1 during the compression of the refrigerant, the first end plate 11 further has a through hole 11a, one end of the through hole 11a is communicated with the compression chamber V, and the other end is communicated with the back pressure chamber C1. The through hole 11a may communicate with the central compression chamber V1 or with the intermediate compression chamber V2 having an intermediate pressure between the discharge pressure and the suction pressure. In a specific embodiment, the through hole 11a communicates with the intermediate compression chamber V2, so that when the refrigerant in the back pressure chamber C1 returns to the intermediate compression chamber V2 again, part of the lubricating oil is carried into the compression chamber V, and as the refrigerant continues to move toward the central compression chamber V1, the lubricating oil also lubricates more fully between the contact surfaces between the movable scroll 1 and the fixed scroll 6, thereby effectively protecting the movable scroll 1 and the fixed scroll 6.

In the above embodiment, the high-pressure refrigerant discharged from the central compression chamber V1 carries part of the lubricating oil into the discharge chamber HP, the discharge cap 7 has the oil chamber C2, an oil separator (not shown) is provided in the oil chamber C2, the refrigerant is discharged from the air outlet 70 by the separation action of the oil separator, and the separated lubricating oil is collected in the oil chamber C2.

Referring again to fig. 3 in combination with fig. 11, in the above embodiment, the compressor comprises a second bearing B2, said second bearing B2 being located between said shaft 4 and the support 2. In addition, the compressor further includes an anti-rotation mechanism (not shown) for preventing the rotation of the non-orbiting scroll 1, at least one of the eccentric portion 42, the first bearing B1, the second bearing B2, and the anti-rotation mechanism is located in the back pressure chamber C1, and in one embodiment, the eccentric portion 42, the first bearing B1, the second bearing B2, and the anti-rotation mechanism are all located in the back pressure chamber C1. Because the eccentric portion 42, the first bearing B1, the second bearing B2, and the rotation preventing mechanism are in a state of relative movement or have parts that move relatively in the process of compressing the refrigerant in the compressor, in order to lubricate between the relatively moving surfaces, a good lubrication condition is ensured, the compressor has an oil return passage L, which communicates the oil chamber C2 and the back pressure chamber C1, that is, the lubricating oil collected in the oil chamber C2 may enter the back pressure chamber C1 through the oil return passage L, so as to lubricate the eccentric portion 42, the first bearing B1, the second bearing B2, and the rotation preventing mechanism in the back pressure chamber C1.

Specifically, referring to fig. 11 again, the oil return passage L includes a first passage L1, a second passage L2, and a third passage L3, the first passage L1 is located in the drain cover 7, and the first passage L1 communicates with the oil chamber C2; the third passage L3 is located in the support 2, and the third passage L3 communicates with the back pressure chamber C1; the second passage L2 communicates with the third passage L3 and the first passage L1, and plays a role in transitional communication. The second passage L2 is located in one of the fixed scroll 6, the bearing 2 and the housing 8, the second passage L2 is located in the fixed scroll 6 when the outer wall of the fixed scroll 6 is used as a part of the compressor housing assembly, the second passage L2 is located in the housing 8 or the bearing 2 or the second passage L2 is located in the housing 8 or the second passage L2 is located in the bearing 2 when the fixed scroll 6 and the bearing 2 are built in the compressor housing assembly, and the installation position of the second passage L2 can be adjusted as required, and the number of possible ways is not illustrated here.

Further, the first bearing B1 is in a high-speed running state during the process of compressing the refrigerant by the compressor, in order to ensure sufficient lubrication of the first bearing B1, the through hole 11a is at least partially opposite to the first bearing B1 along the thickness direction F of the plate 33, so that the lubricating oil in the compression chamber V can enter the first bearing B1 through the through hole 11a to lubricate the first bearing B1, reduce wear of the first bearing B1, and effectively prolong the service life of the first bearing B1.

In the above embodiment, the throttle plug W is disposed in the oil return passage L to reduce the pressure of the oil return, and the filter may be disposed in the oil return passage L to filter impurities, reduce abrasion of the impurities to the moving parts, reduce abrasion of the moving parts of the compressor, and integrate the throttle plug W and the filter, as shown in fig. 11, to achieve the effect of filtering while achieving throttling by one part.

Further, referring again to fig. 3, the compressor includes a third bearing B3 and a bearing mounting portion 80, the third bearing B3 connects the bearing mounting portion 80 and the shaft 4, and the bearing mounting portion 80 is connected to or is a single piece with the casing 8. By providing the third bearing B3 and the bearing mounting portion 80 so that the shaft 4 has at least two-point support, stability during rotation of the shaft is improved, contributing to reduction of operation noise of the compressor. In addition, the casing 8 has an air inlet 81, the air inlet 81 is communicated with a pipeline of the heat exchange system, the refrigerant returns to the compressor from the air inlet 81 in the process of compressing the refrigerant, and enters the compression cavity V again for compression and discharge, so that the circulation is realized, and the heat exchange function of the heat exchange system is realized to meet the heat exchange requirement.

Some of the technical implementations in the above embodiments may be combined or replaced.

The technical principles of the present application have been described above in connection with specific embodiments, but it should be noted that the above descriptions are only for explaining the principles of the present application and should not be construed as limiting the scope of the present application in any way. Other embodiments of the application, or equivalents thereof, will suggest themselves to those skilled in the art without undue burden from the present disclosure, based on the explanations herein.

Claims

1. A compressor, characterized in that: the seal assembly is at least partially positioned between the movable scroll and the support, the seal assembly comprises a first seal part, a second seal part and a plate, the plate is positioned between the movable scroll and the support, the first seal part and the second seal part are respectively positioned at two sides of the plate, the first seal part is positioned between the plate and the movable scroll, and the second seal part is positioned between the plate and the support;

2. The compressor as set forth in claim 1, wherein: the wear-resistant part is in contact with the plate, at least part of the wear-resistant part is a plastic piece, and the hardness of the wear-resistant part is H ₁ Wherein 55HD is less than or equal to H ₁ The wear-resistant part is made of one or more of polytetrafluoroethylene, polyphenylene sulfide, polyether-ether-ketone, paraformaldehyde resin and polyimide, and the wear-resistant part is made of the same or the same of the materials;

the elastic part is at least partially a rubber piece, and the hardness of the elastic part is H ₂ Wherein 50HA is less than or equal to H ₂ And the elastic part is made of rubber, and the HA is less than or equal to 85.

3. The compressor as set forth in claim 1, wherein: the wear part comprises a first contact surface, the first contact surface is in contact with the plate, and the first contact surface is an annular plane;

the elastic portion includes a second contact surface with which at least one of the orbiting scroll and the bearing is in contact.

4. The compressor as set forth in claim 1, wherein: the first sealing portions are in contact with the orbiting scroll and the plate, and the second sealing portions are in contact with the bearing and the plate;

the plate has a first surface facing the first sealing portion and a second surface in a thickness direction, the first surface being in contact with the first sealing portion; the second surface faces the second sealing part, and the second surface is contacted with the second sealing part;

the first contact surface and the first surface are smooth surfaces, and the first sealing part and the second sealing part are annular structures.

5. The compressor according to any one of claims 1 to 4, wherein: the orbiting scroll having a first mounting groove open to the plate, the first seal being at least partially located in the first mounting groove; the movable scroll includes a first end plate and a first wrap, the first mounting groove being located in the first end plate;

the support has a second mounting groove open towards the plate and/or the plate has a second mounting groove open towards the support, the second sealing portion being at least partially located in the second mounting groove.

6. The compressor as set forth in claim 5, wherein: the first sealing part comprises a wear-resistant part, the wear-resistant part is positioned between the plate and the movable vortex piece, the wear-resistant part further comprises a third contact surface, the third contact surface is in contact with the movable vortex piece, and the third contact surface and the first contact surface are at least partially distributed along the thickness direction of the plate; the section of the first sealing part is rectangular;

the second sealing part comprises an elastic part, the elastic part is positioned between the plate and the supporting piece, a second contact surface of the elastic part is in contact with the supporting piece, the elastic part also comprises a fourth contact surface, the fourth contact surface is in contact with the plate, and the second contact surface and the fourth contact surface are at least partially distributed along the thickness direction of the plate; the section of the second sealing part is any one of O-shaped, C-shaped and X-shaped;

the compressor includes a positioning member connecting the plate and at least one of the support member and the orbiting scroll.

7. The compressor as set forth in claim 6, wherein: the compressor includes a projection extending into the second mounting groove, the projection abutting the elastic portion in a thickness direction of the plate, the projection being located at one of the plate and the support;

the bulge is of a closed annular structure.

8. The compressor as set forth in claim 5, wherein: the first sealing part further comprises an elastic part, the elastic part is in abutting joint or connection with the wear-resistant part of the first sealing part, and the second contact surface of the elastic part of the first sealing part is in abutting joint with the movable vortex piece;

and/or the second sealing part comprises an elastic part and a wear-resistant part, the elastic part is in abutting connection with or is connected with the wear-resistant part, and a second contact surface of the elastic part of the second sealing part is in contact with the supporting piece.

9. The compressor as set forth in claim 5, wherein: the compressor includes a shaft and a shaft seal between the shaft and the support, the shaft seal sealingly connecting the shaft and the support; the compressor has a back pressure chamber located between the bearing and the orbiting scroll and between the seal assembly and the shaft seal;

the compressor further comprises a fixed vortex piece and a discharge cover, wherein the fixed vortex piece is meshed with the movable vortex piece, the fixed vortex piece is positioned on one side of the first end plate, which is away from the supporting piece, the discharge cover is connected with the fixed vortex piece, the discharge cover is provided with an oil cavity, and the compressor is provided with an oil return passage, and the oil return passage is communicated with the oil cavity and the back pressure cavity;

the compressor also includes a housing, and the support is at least partially located within the housing.

10. The compressor as set forth in claim 9, wherein: the oil return passage comprises a first passage, a second passage and a third passage, the first passage is positioned on the exhaust cover, and the first passage is communicated with the oil cavity; the third passage is positioned on the supporting piece and is communicated with the back pressure cavity; the second passageway is located in one of the fixed scroll, the support, and the housing, and the second passageway communicates with the third passageway and the first passageway;

the compressor is provided with a compression cavity, the compression cavity is positioned between the fixed vortex piece and the movable vortex piece, the first end plate is further provided with a through hole, one end of the through hole is communicated with the compression cavity, and the other end of the through hole is communicated with the back pressure cavity;

the shaft comprises a main body part and an eccentric part, the eccentric part is connected with the main body part, the eccentric part is eccentrically arranged relative to the axial line of the main body part, the compressor comprises a first bearing, the first bearing is connected with the eccentric part and a first end plate, and the through hole is at least partially opposite to the first bearing along the thickness direction of the plate;

the compressor includes a second bearing located between the shaft and the support, at least one of the eccentric portion, the first bearing, and the second bearing being located within the back pressure chamber.