CN217976583U - Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber - Google Patents

Abstract

The utility model provides a scroll compressor. A scroll compressor includes: compressor housings (1, 2, 3) in the bottom of which an oil sump (31) for storing lubricating oil is formed; the vortex subassembly, the vortex subassembly includes: a first scroll (5) located within the compressor housing; and a second scroll (6) located within the compressor housing, wherein the first scroll and the second scroll cooperate to form a compression chamber (56) and the first scroll and the second scroll rotate together; the actuating mechanism (7) is accommodated in the compressor shell and is used for driving the first scroll plate to rotate so as to drive the second scroll plate to rotate; and an oiling screw rod (10), wherein the upper end (101) of the oiling screw rod is matched and connected with the second scroll plate, and the lower end (103) of the oiling screw rod extends into the oil pool (31).

Description

Scroll compressor having a plurality of scroll members

Technical Field

The utility model relates to a scroll compressor.

Background

An oil pump (such as a centrifugal pump) in a co-rotating scroll compressor (CRC) has poor oil pumping capability at low speed operation. For another example, the gear pump has a complex structure, large wear between gears, and poor reliability.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above problems, and potentially other technical problems.

According to one aspect of the present invention, a scroll compressor is provided. A scroll compressor includes:

-a compressor housing, at the bottom of which an oil sump for storing lubricating oil is formed;

-a scroll assembly comprising:

a first scroll located within the compressor housing; and

a second scroll positioned within the compressor housing, wherein the first scroll and the second scroll cooperate to form a compression chamber and the first scroll and the second scroll rotate together;

-an actuating mechanism housed in the compressor housing for driving the first scroll in rotation and in turn the second scroll in rotation; and

an oiling screw, the upper end of which is in fit connection with the second scroll plate, and the lower end of which extends into the oil sump.

Specifically, the scroll compressor further includes:

-a bracket mounted within the compressor housing;

a flange supported on the support and supporting the first scroll and the second scroll, wherein the flange is connected to the first scroll;

the actuating mechanism is used for driving the flange to rotate so as to drive the first scroll plate to rotate and further drive the second scroll plate to rotate.

Specifically, the second scroll includes a first hub; the scroll compressor further includes a crankshaft positioned within the flange and cooperating with the first hub of the second scroll.

Specifically, the flange includes:

-a tray located at the upper end of the flange;

-a second hub extending from the tray towards the lower end of the flange; and

-a central hole,

wherein the flange is connected to the first scroll through the tray, the crankshaft has an outer step surface, and the second hub of the flange has an inner step surface opposite the outer step surface.

Specifically, the crankshaft is generally cylindrical and has:

-an axial through hole in which an oiling screw is arranged, the central axis of the oiling screw being parallel to and not coinciding with the central axis of the crankshaft;

-a lower section; and

-an upper section having an outer diameter greater than an outer diameter of the lower section, thereby forming an external step surface at the junction of the upper and lower sections.

Preferably, an oil return hole is provided on an upper end surface of the crankshaft, the oil return hole extending downward and penetrating an upper section and a lower section of the crankshaft, thereby forming an oil return passage.

Preferably, the scroll compressor further comprises a bearing comprising a bearing or bushing or washer, wherein the bearing is located on the same side of the compression chamber.

Specifically, the support may include:

a first sliding bearing between an inner circumferential surface of the upper section of the crankshaft and an outer circumferential surface of the first hub of the second scroll, wherein a drive surface is provided on the outer circumferential surface of the first sliding bearing, wherein a first pin groove is provided on the inner circumferential surface of the upper section of the crankshaft, in which first pin groove at least one first pin is embedded and cooperates with the drive surface of the first sliding bearing; and/or

-a second sliding bearing between the inner peripheral surface of the central hole of the flange and the outer peripheral surface of the upper section of the crankshaft; and/or

A third sliding bearing between the inner peripheral surface of the flange and the outer peripheral surface of the lower section of the crankshaft.

Specifically, the support may further include:

-a first thrust bearing between an inner step face of the flange and an outer step face of the crankshaft; and/or

-a second thrust bearing located between the lower surface of the second scroll and the upper surface of the flange; and/or

-a third thrust bearing between the bottom face of the flange and the bracket.

Specifically, the first hub of the second scroll has an inner bore having an inner shape that interfits with an outer shape of the upper end of the oiling screw to fit the upper end of the oiling screw into the inner bore of the first hub of the second scroll.

Optionally, an outer circumferential surface of an upper end of the oiling screw is in interference fit with an inner circumferential surface of the inner bore of the first hub of the second scroll to prevent rotation of the oiling screw relative to the second scroll.

Optionally, the outer circumferential surface of the upper end of the oiling screw comprises a first mating surface, and the inner circumferential surface of the inner hole of the first hub of the second scroll comprises a second mating surface. When the upper end of the oiling screw rod is matched in the inner hole of the first hub of the second scroll plate, the first matching surface and the second matching surface are mutually attached to prevent the oiling screw rod from rotating relative to the second scroll plate.

Optionally, a second pin groove is formed in an outer circumferential surface of an upper end of the oiling screw, and a third pin groove is formed in an inner circumferential surface of an inner hole of the first hub of the second scroll. The oiling screw and the second scroll are fixedly connected by a second pin embedded in the second pin groove and the third pin groove.

Alternatively, an external thread is provided on an outer peripheral surface of an upper end of the oiling screw, and an internal thread is provided on an inner peripheral surface of an inner bore of the first hub of the second scroll, the oiling screw and the second scroll being fixedly connected by a threaded connection between the external thread and the internal thread.

Alternatively, a stopper is provided on an outer circumferential surface of an upper end of the oiling screw, a retainer groove is provided on an inner circumferential surface of an inner hole of the first hub of the second scroll, and a retainer ring is provided in the retainer groove. When the upper end of the oiling screw rod is matched with the inner hole of the first hub of the second scroll plate, the stopping part is embedded into the stopping ring groove, and the stopping part is clamped by the stopping ring so as to prevent the upper end of the oiling screw rod from being separated from the inner hole of the first hub of the second scroll plate.

Optionally, the oiling screw is integrally provided as a threaded screw; or the lower end of the oiling screw is set into a threaded screw; or the upper end and the lower end of the oiling screw rod are set into threaded screw rods, and the middle section is non-threaded so as to connect the upper end and the lower end.

Optionally, a first radial through hole, a second radial through hole and a third radial through hole are coaxially provided at the lower end of the oiling screw, the lower end of the crankshaft and the lower end of the bracket, respectively, and a third pin passes through the first radial through hole, the second radial through hole and the third radial through hole to prevent the oiling screw, the crankshaft and the bracket from rotating relative to each other. Optionally, the scroll compressor further comprises a thin walled sleeve. The thin-walled sleeve is disposed between the outer peripheral surface of the oiling screw and the inner peripheral surface of the axial through-hole of the crankshaft, and the lower edge of the thin-walled sleeve is above the third pin to allow the thin-walled sleeve to rotate freely between the outer peripheral surface of the oiling screw and the inner peripheral surface of the axial through-hole of the crankshaft.

Optionally, the actuating mechanism comprises a disc motor comprising a stator fixed within the compressor housing and a rotor connected to the flange for driving the flange in rotation.

Specifically, a suction port is provided on the compressor housing. The scroll compressor also includes a protective sleeve having a wall positioned between the suction inlet and the scroll assembly. Optionally, the protective sleeve is of full cylindrical configuration; alternatively, the protective sleeve is of a partially cylindrical configuration. Optionally, the diameter of the protective sleeve is fixed in the axial direction of the protective sleeve; or the diameter of the protective sleeve may vary in the axial direction of the protective sleeve.

Optionally, a fourth radial through hole and a fifth radial through hole are provided on the crankshaft. One end openings of the fourth radial through hole and the fifth radial through hole are both located on the outer peripheral surface of the crankshaft, and the other end openings of the fourth radial through hole and the fifth radial through hole are both located on the inner peripheral surface of the axial through hole of the crankshaft.

Optionally, a sixth radial through hole is provided in the crankshaft, one end opening of the sixth radial through hole is located on the outer circumferential surface of the crankshaft, and the other end opening of the sixth radial through hole is communicated with the oil return passage.

Through adopting the technical scheme of the utility model, following beneficial technological effect has been gained at least:

in the aspect of the overall structure of the scroll compressor, compared with the conventional scroll compressor, the scroll compressor of the utility model has the advantages of more compact structure, miniaturization and light weight under the condition of the same refrigerating capacity;

in terms of the lubricating performance and the structure of the supporting member (such as a bearing), compared with the existing co-rotating scroll compressor, the bearing of the scroll compressor of the utility model has shorter lubricating path, higher oil pump efficiency and better performance;

the oiling screw rod is simple in structure, not prone to abrasion and good in reliability, and meanwhile, even when the compressor runs at a low speed, the sufficient oil pumping amount can be still kept, and the lubricating effect of internal parts of the compressor is guaranteed.

Drawings

In order to facilitate understanding of the invention, the invention is described in more detail below on the basis of exemplary embodiments and with reference to the attached drawings. The same or similar reference numbers are used in the drawings to refer to the same or similar parts. It should be understood that the drawings are merely schematic and that the dimensions and proportions of elements in the drawings are not necessarily precise.

Fig. 1A is a longitudinal sectional view of a scroll compressor according to an exemplary embodiment of the present invention;

FIG. 1B is an exploded view of the scroll compressor shown in FIG. 1A, with some components omitted from FIG. 1B to make the drawing more concise;

FIG. 2 is a schematic illustration of the suction path, discharge path, and lubrication path of the scroll compressor shown in FIG. 1A;

FIG. 3A is an exploded view of a variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some of the major components shown in FIG. 3A; fig. 3B is a perspective view of a second scroll in this modification; FIG. 3C is a longitudinal section of some of the components of this variant in the assembled state;

FIG. 4A is an exploded view of another variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some of the major components shown in FIG. 4A; FIG. 4B is a longitudinal cross-sectional view of the components shown in FIG. 4A; FIG. 4C is a longitudinal sectional view of some parts in this modification in an assembled state;

FIG. 5A is an exploded view of another variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some of the major components shown in FIG. 5A; FIG. 5B is a longitudinal sectional view of some parts in the modification in an assembled state; FIG. 5C is a top view of the crankshaft; FIG. 5D is an enlarged view of area D in FIG. 5B;

fig. 6A is a perspective view of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention; fig. 6B is a perspective view of a modified example of the protection sleeve of the scroll compressor according to the exemplary embodiment of the present invention; fig. 7A to 7C are a perspective view, a plan view, and a sectional view, respectively, of another modification of the protection sleeve of the scroll compressor according to the exemplary embodiment of the present invention.

Detailed Description

Specific embodiments and modifications of the present invention are described in detail below with reference to the accompanying drawings.

[ general structure ]

Fig. 1A is a longitudinal sectional view of a scroll compressor according to an exemplary embodiment of the present invention. FIG. 1B is an exploded view of the scroll compressor shown in FIG. 1A, with some components omitted from FIG. 1B to make the drawing more concise.

As shown in fig. 1A and 1B, a scroll compressor according to an exemplary embodiment of the present invention includes a compressor housing and a bracket 4, a scroll assembly (5, 6), an actuating mechanism 7, a flange 8, a plurality of bearings (e.g., bearings or bushings or washers) 11, 12, 13, 14, 15, 16, a crankshaft 9, and the like mounted in the compressor housing.

Specifically, the compressor housing includes an upper cover 1, a middle case 2, and a lower case 3. The upper cover 1 is provided with a discharge port 1001. A discharge chamber 1002 is formed between the upper cover 1 and the top surface of the middle case 2. The middle case 2 is provided with a suction port 2001 for sucking a fluid (e.g., a refrigerant). An oil sump 31 for storing lubricating oil is formed at the bottom of the lower case 3. In addition, a plurality of legs 32 are provided on the bottom surface of the lower case 3, and fixing holes 33 are provided on the legs 32 so that the lower case 3 is fixed to a support (e.g., the ground) using fasteners such as fixing bolts.

The support 4 comprises a hub 41 and a support arm 42. A plurality of screw holes 43 are opened in the upper surface of the support arm 42. Further, oil leakage holes 44 are provided in the bottom surface where the support arm 42 and the hub 41 are connected. The bracket 4 may be fixed in the lower shell 3 of the compressor, for example, by the lower end of the hub 41 in the lower shell 3.

The scroll assembly includes a first scroll 5 and a second scroll 6. The second scroll 6 is co-rotatable with the first scroll 5 to define a compression chamber 56 between the first scroll 5 and the second scroll 6. The first scroll 5 has a scroll wrap 51 extending downward and a center hole 52 at the top thereof. Second scroll 6 has a downwardly extending first hub 61 and an upwardly extending wrap 62. The wraps 51 and 62 snap into one another to form compression pockets 56.

The flange 8 is supported on the bracket 4 and includes a tray 81, a second hub 82 and a central aperture 83. A convex portion 831 and a concave portion 832 may be provided in the central hole 83. The upper surface 811 of the tray 81 supports the first scroll 5 and the second scroll 6. Specifically, the flange 8 may be connected to the first scroll 5 through the tray 81 to drive the first scroll 5 to rotate.

The actuating mechanism 7 may be an axial flux motor (e.g. a disk motor) or a radial flux motor (e.g. an interior permanent magnet motor). The motor can rotate at 40000 rpm.

According to an exemplary embodiment of the present invention, the disc motor includes a stator 71 and a rotor 72. The stator 71 may be fixed to the bracket 4 or alternatively directly to the inner wall of the middle shell 2. In the embodiment shown in fig. 1A and 1B, stator 71 has a plurality of windings 714, a magnetic core 713, and an outer periphery 711, with a plurality of threaded holes (or through holes) 712 provided in outer periphery 711. These threaded holes 712 correspond to the threaded holes 43 in the support arms 42 of the bracket 4 so that the stator 71 can be fixed to the bracket 4 using a plurality of screws 18. The rotor 72 has a magnetic core, a central hole 722 and a downwardly extending hub 721. The central hole 722 of the rotor 72 is fixedly connected to the second hub 82 of the flange 8 (e.g., by interference fit, spline fit, etc.) to drive the flange 8 to rotate, so as to drive the first scroll 5 and the second scroll 6 to rotate together, for example, to drive the first scroll 5 to rotate, and the gas force generated by the rotation of the first scroll 5 drives the second scroll 6 to rotate together.

The crankshaft 9 is located within the central bore 83 of the flange 8 and cooperates with the first hub 61 of the second scroll 6. In addition, the scroll compressor according to an exemplary embodiment of the present invention may further include an oiling screw 10. The upper end 101 of the upper oil screw 10 is in mating connection with the first hub 61 of the second scroll 6, and the lower end 103 of the upper oil screw 10 extends into the oil sump 31. The second scroll 6 rotates and the upper oil screw 10 is rotated, thereby pumping the oil from the oil sump 31 to other components inside the scroll compressor.

The crankshaft 9 is generally cylindrical and has an axial through hole 91, an upper section 92 and a lower section 93. The oiling screw 10 is disposed in the axial through hole 91, and the central axis O of the oiling screw 10 ₂ And the central axis O of the crankshaft 9 ₁ Parallel and not coincident. In other words, the oiling screw 10 is arranged eccentrically with respect to the crankshaft 9. The outer and inner diameters of upper section 92 of crankshaft 9 are larger than the outer and inner diameters of lower section 93, respectively, forming an outer step surface 95 and an inner step surface 87 at the junction of upper section 92 and lower section 93 (see fig. 5C). An oil return hole 97 is provided in the upper end surface 94 of the crankshaft 9. Oil return holes 97 extend downward and through the upper and lower sections 92 and 93, thereby forming oil return passages 99 and 100.

In an exemplary embodiment of the present invention, all of the bearings 11, 12, 13, 14, 15, 16 (e.g., a plain bearing assembly or a thrust bearing assembly, etc.) may be disposed on only the same side of the compression chamber 56. In the perspective of fig. 1A, these supports are both located on the underside of the compression chamber 56.

In particular, these bearings (for example bearings or bushings or washers) may comprise a first sliding bearing 11, a second sliding bearing 12 and a third sliding bearing 13. The first slide bearing 11 is located between the inner peripheral surface of the upper section 92 of the crankshaft 9 and the outer peripheral surface of the first hub 61 of the second scroll 6. The second sliding bearing 12 is located between the inner peripheral surface of the central hole 83 of the flange 8 and the outer peripheral surface of the upper section 92 of the crankshaft 9. The third sliding bearing 13 is located between the inner peripheral surface of the central hole 83 of the flange 8 and the outer peripheral surface of the lower section 93 of the crankshaft 9.

A first pin slot 96 is provided on the inner surface of the upper section 92 of the crankshaft 9. The first pin 19 is fitted in the first pin groove 96 and engages with the driving surface 111 of the first slide bearing 11. The first sliding bearing 11 may comprise a generally cylindrical sleeve body and a bearing housing interference fitted within the sleeve body. The outer peripheral surface of the second slide bearing 12 may be provided with a recess 121 and a projection 122 for mating with a projection 831 and a recess 832, respectively, in the central hole 83 of the flange 8. In this way, when the flange 8 rotates, the second sliding bearing 12 is brought into rotation. The second support member 12 may include a generally cylindrical sleeve body and a bearing housing interference fit within the sleeve body.

The bearings also include a first thrust bearing 15, a second thrust bearing 14 and a third thrust bearing 16. The first thrust bearing 15 is located between the inner step face 84 of the flange 8 and the outer step face 95 of the crankshaft 9. Second thrust bearing 14 is located between the lower surface of second scroll 6 and the upper surface 811 of tray 81 of flange 8. The third thrust bearing 16 is located between the underside of the flange 8 and the junction of the hub 41 and the support arm 42 of the carrier 4.

One or more of the first, second and third thrust bearings 15, 14, 16 may be configured in the form of a thrust washer or thrust bearing. Taking the first thrust bearing 15 as an example, as shown in fig. 1B, the first thrust bearing 15 may be configured in the form of a thrust washer. A plurality of oil grooves 151, which are offset from each other, are provided on the upper and lower surfaces of the first thrust bearing 15 for accumulating lubricating oil to form an oil film on the surface of the friction pair. The oil sump 151 shown in FIG. 1B is generally rectangular in shape, it being understood that the oil sump 151 may also be circular or other suitable shape. The other thrust bearings 14 and 16 may be of similar construction to the first thrust bearing. In addition, the material of which the thrust bearing is constructed may be a wear resistant metal or non-metal material.

The first hub 61 of the second scroll 6 has an inner bore 63 (which is not visible in fig. 1B, see also fig. 3B) the inner shape of which interfits with the outer shape of the upper end 101 of the upper oil screw 10, thereby allowing the upper end 101 of the upper oil screw 10 to fit into the inner bore 63 of the first hub 61 of the second scroll 6.

Specifically, the outer peripheral surface of the upper end 101 of the oiling screw 10 is interference-fitted with the inner peripheral surface of the inner hole 63 of the first hub 61 of the second scroll 6 to prevent the oiling screw 10 from rotating relative to the second scroll 6.

Alternatively, as shown in fig. 1B, the outer peripheral surface of the upper end 101 of the upper oil screw 10 includes a first mating surface (a portion indicated by reference numeral "101" in fig. 1B), and correspondingly, the inner peripheral surface of the inner bore 63 of the first hub 61 of the second scroll 6 includes a second mating surface (which is not visible in fig. 1B). When the upper end 101 of the upper oil screw 10 is fitted into the inner bore 63 of the first hub 61 of the second scroll 6, the first and second mating surfaces abut against each other to prevent the upper oil screw 10 from rotating relative to the second scroll 6.

Further, a stopper 102 is provided on the outer peripheral surface of the upper end 101 of the upper oil screw 10. A retainer groove is provided on an inner peripheral surface of the inner hole of the first hub 61 of the second scroll 6 and a retainer ring 20 is provided in the retainer groove. When the upper end 101 of the upper oil screw 10 is fitted into the inner bore 63 of the first hub 61 of the second scroll 6, the stopper 102 is embedded in the retainer groove, and the retainer ring 20 can catch the stopper 102 from below to prevent the upper end 101 of the upper oil screw 10 from coming out of the inner bore 63 of the first hub 61 of the second scroll 6.

The scroll compressor according to an exemplary embodiment of the present invention further includes a protection sleeve 17. As shown in fig. 1A, the wall 171 of the protective sleeve 17 is positioned between the suction port 2001 and the scroll assembly to avoid fluid (e.g., refrigerant) from directly impacting the scroll assembly to damage the scroll assembly when the scroll compressor is drawing fluid. As shown in fig. 1B, the protection sleeve 17 has a generally cylindrical thin-walled configuration with a cylindrical wall 171 and a lower flange 172. A plurality of screw holes (or through holes) 173 are provided on the lower flange 172. These threaded holes 173 correspond to a plurality of threaded holes 712 on the outer periphery 711 of the stator 71 so that the protective sleeve 17 can be fixed to the stator 71 with a plurality of screws 18. In addition, fig. 6A shows a perspective view of the protection sleeve 17. As shown in fig. 6A, an opening 170 is also provided in a lower flange 172 of the protective sleeve 17 to allow fluid to pass therethrough.

As shown in fig. 1A, a fifth radial through hole 90 is provided in the crankshaft 9. One end opening of the fifth radial through hole 90 is located on the outer peripheral surface of the crankshaft 9, and the other end opening of the fifth radial through hole 90 is located on the inner peripheral surface of the axial through hole 91 of the crankshaft 9. In addition, another or a plurality of sixth radial through holes 98 are provided in the crankshaft 9. One end opening of the sixth radial through hole 98 is located on the outer peripheral surface of the crankshaft 9, and the other end opening of the sixth radial through hole 98 communicates with the oil return passage 99. As will be described hereinafter, the fifth radial through hole 90 is for conveying lubricating oil from the oil sump 31 to the components to be lubricated of the scroll compressor; the sixth radial through hole 98 is used for oil return, and may communicate with the oil return passages 99 and 100.

[ fluid pathway ]

Next, a fluid path inside the scroll compressor according to an exemplary embodiment of the present invention will be described with reference to fig. 2. FIG. 2 is a schematic illustration of the suction, discharge and lubrication paths of the scroll compressor shown in FIG. 1A. As shown in fig. 2, mainly two suction paths XQ1 and XQ2, four lubrication paths RH1, RH2, RH3, and RH4, and two oil return paths HY1 and HY2 are shown. It should be understood that the fluid paths within the scroll compressor according to exemplary embodiments of the present invention described below are merely illustrative, and not limiting or exhaustive. In practical applications, more or fewer fluid paths may be provided.

Specifically, along the suction path XQ1, the refrigerant enters the middle shell 2 of the scroll compressor through the suction port 2001, flows upward by being blocked by the cylinder wall 171 of the protective sleeve 17, then flows downward through a gap between the cylinder wall 171 and the scroll assembly (specifically, the first scroll 5), and then enters the compression chamber 56 through the fluid passages provided in the tray 81 of the flange 8 and the first scroll 5.

Along the suction path XQ2, the refrigerant enters the middle shell 2 of the scroll compressor via the suction port 2001, flows downward while being blocked by the cylinder wall 171 of the protective sleeve 17, then passes through the gap between the stator 71 and the rotor 72 of the actuator 7 and the gap between the center hole of the stator 71 and the outer circumferential surface of the flange 8, and then enters the compression chamber 56 via the fluid passages provided in the tray 81 of the flange 8 and the scroll assembly.

Along the lubrication path RH1, the lubricating oil initially stored in the oil sump 31 rises to the second sliding bearing 12 with the rotation of the upper oil screw 10 and then reaches the first thrust bearing 15. Then, a part of the lubricating oil flows down into the oil return passage 99 via the oil return hole 97, and further into the oil return passage 100; another part of the lubricating oil flows down to the sixth radial through hole 98 along the gaps on both sides of the second sliding bearing piece 12 and the gaps on both sides of the first sliding bearing piece 11, and then into the oil return passage 99 via the sixth radial through hole 98, and further into the oil return passage 100. The lubricating oil in the oil return passage 100 eventually flows back into the oil sump 31. In this way, the oil return path HY1 is formed.

Along the lubrication path RH2, the lubricating oil initially stored in the oil sump 31 rises to the second thrust bearing 14 as the upper oil screw 10 rotates, then flows through the second thrust bearing 14 into the fluid passages provided in the tray 81 of the flange 8 and the scroll assembly, and finally enters the compression chamber 56 along with the refrigerant.

The fluid in the compression chamber 56, after being compressed, flows into the discharge chamber 1002 through the center hole 52 at the top of the first scroll 5 and the center hole 2002 at the top of the middle shell 2, and is then discharged to the outside of the scroll compressor through the discharge port 1001, thereby forming a discharge path PQ.

Further, along the lubrication path RH2, the lubricating oil initially stored in the oil sump 31 rises to the fifth radial through hole 90 as the upper oil screw 10 rotates. Flows to the third sliding bearing 13 via the fifth radial through hole 90. Then, a part of the lubricating oil flows upward to the first thrust bearing 15, thereby forming a lubrication path RH3, and another part of the lubricating oil flows downward to the third thrust bearing 16, thereby forming a lubrication path RH4.

The lubricating oil after lubricating the third thrust bearing 16 and the lubricating oil flowing down from above can flow on the bottom surface where the support arm 42 is connected to the hub 41, and finally flow back into the oil sump 31 through the oil leak hole 44. In this way, the oil return path HY2 is formed.

[ PROFILE EXAMPLES ]

Fig. 3A is an exploded view of a variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some major components shown in fig. 3A. Fig. 3B is a perspective view of the second scroll in this modification. Fig. 3C is a longitudinal sectional view of some parts in this modification in an assembled state.

The variant shown in fig. 3A to 3C differs from the embodiment of the invention described above in the way in which the upper end 101 of the upper oil screw 10 cooperates with the first hub 61 of the second scroll 6. Specifically, as shown in fig. 3A to 3C, second pin grooves 104 and third pin grooves 64 are respectively opened on the outer peripheral surface of the upper end of the upper oil screw 10 and the inner peripheral surface of the inner bore 63 of the first hub 61 of the second scroll 6, and the upper oil screw 10 and the second scroll 6 are fixedly connected by the second pins 21 fitted in the second pin grooves 104.

Fig. 4A is an exploded view of another variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some of the major components shown in fig. 4A. Fig. 4B is a longitudinal sectional view of the member shown in fig. 4A. Fig. 4C is a longitudinal sectional view of some components in this modification in an assembled state.

The modification shown in fig. 4A to 4C differs from the embodiment of the present invention described above in that:

i) An external thread 104 'is provided on the outer peripheral surface of the upper end 101 of the oiling screw 10, and an internal thread (a portion indicated by reference numeral "63" in fig. 4B) is provided on the inner peripheral surface of the inner bore of the first hub 61 of the second scroll 6, the oiling screw 10 and the second scroll 6 being fixedly connected by the threaded connection between the external thread 104' and the internal thread;

ii) in the embodiment of the invention described hereinbefore, only the lower end 103 of the upper oil screw 10 is provided as a threaded screw. However, in the modification shown in fig. 4A to 4C, the upper oil screw 10 is provided as a threaded screw as a whole, thereby forming an upper oil thread 103' distributed along the entire outer peripheral surface of the upper oil screw 10; and

iii) A fourth radial through hole 89 is additionally provided in the lower section 93 of the crankshaft 9. The fourth radial through hole 89 is located above the original fifth radial through hole 90. Accordingly, the original sixth radial through hole 98 is blocked by the stopper 107. In this way, a lubrication path and an oil return path can be formed which are slightly different from the situation in the previously described embodiments of the invention.

Fig. 5A is an exploded view of another variation of a scroll compressor according to an exemplary embodiment of the present invention, with only some of the major components shown in fig. 5A. Fig. 5B is a longitudinal sectional view of some components in this modification in an assembled state. Fig. 5C is a plan view of the crankshaft. Fig. 5D is an enlarged view of the region D in fig. 5B.

The modification shown in fig. 5A to 5D differs from the embodiment of the present invention described above in that:

i) The oiling screw 10' is integrally provided as a threaded screw (i.e., the oiling screw 10' is provided with threads 105 on the entire outside thereof, and the connection structure (such as a stopper, a retainer ring, etc.) between the upper end 101 of the oiling screw 10' and the inner bore of the first hub 61 of the second scroll 6 is eliminated. Alternatively, as shown in fig. 5B, a clearance fit is formed between the upper end 101 of the upper oil screw 10' and the inner bore of the first hub 61 of the second scroll 6;

ii) at the lower end 103 "of the oiling screw 10', at the lower end of the crankshaft 9 and at the lower end of the support 4, there are respectively provided a first radial through hole 106, a second radial through hole 88 and a third radial through hole 45, coaxial. Through these radial through holes an elongated third pin 22 passes to prevent the upper oil screw 10', the crankshaft 9 and the bracket 4 from rotating relative to each other. In this case, the stator 71 of the electric motor of the actuating mechanism 7 (not shown in fig. 5A and 5B) will be fixed directly to the compressor housing and no longer to the supporting arms of the bracket 4; and

iii) A thin-walled sleeve 23 is provided between the outer circumferential surface of the oiling screw 10' and the inner circumferential surface of the axial through-hole of the crankshaft 9. The lower edge of the thin-walled sleeve 23 is located above the third pin 22 to allow the thin-walled sleeve 23 to rotate freely between the outer peripheral surface of the upper oil screw 10' and the inner peripheral surface of the axial through hole of the crankshaft 9. Thus, when the thin-walled sleeve 23 is rotated by the second scroll 6, the lubricating oil can rise along the outer peripheral surface of the oiling screw 10' and further supplied to the parts to be lubricated of the scroll compressor.

In another embodiment, the upper and lower ends of the oiling screw may be provided with threaded screws, and the middle section is non-threaded, connecting the upper and lower ends.

Fig. 6B is a perspective view of a modified example of the protection sleeve of the scroll compressor according to the exemplary embodiment of the present invention.

The variant shown in fig. 6B differs from the embodiment of the invention described above in that: the protective sleeve 17 'is of a partial cylindrical (e.g., semi-cylindrical) configuration rather than a full cylindrical configuration, so long as the cylinder wall 171' is enabled to act as a barrier to fluid directly impinging on the scroll assembly. In addition, the positions and the number of the screw holes (or through holes) 173 'and the openings 170' on the lower flange 172 'of the protection sleeve 17' may be appropriately changed according to the actual situation.

Fig. 7A and 7B are a perspective view and a plan view, respectively, of another modification of the protection sleeve of the scroll compressor according to the exemplary embodiment of the present invention. Fig. 7C is a cross-sectional view of the protective sleeve taken along plane C-C in fig. 7B.

The modification shown in fig. 7A to 7C differs from the embodiment of the present invention described above in that the diameter of the protective sleeve 17 "is varied in the axial direction thereof, rather than being constant. In other words, as shown in fig. 7A to 7C, the protection sleeve 17 ″ has a reduced diameter section 174. This configuration of the protective sleeve 17 "may extend the length of the fluid path, thereby reducing the impact force of the fluid. Furthermore, this configuration of the protective sleeve 17 "may enhance its own rigidity.

In addition, it should be understood that the thickness of the wall 171 "of the protection sleeve 17", the positions and the number of the screw holes (or through holes) 173 "and the openings 170" on the lower flange 172 "may be appropriately changed according to the actual situation. The material of the protective sleeve may be a suitable metallic or non-metallic material.

In addition, it is conceivable that the protection sleeve 17 ″ may also be constructed in a partially cylindrical (e.g., semi-cylindrical) configuration, instead of a completely cylindrical configuration, similarly to the case shown in fig. 6B.

Although the technical objects, technical solutions and technical effects of the present invention have been described in detail hereinabove with reference to specific embodiments and modifications, it should be understood that the above embodiments and modifications are merely illustrative and not restrictive. Any modification, equivalent replacement or improvement made by those skilled in the art within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (22)

1. A scroll compressor, comprising:

a compressor housing (1, 2, 3) having an oil sump (31) formed in the bottom thereof for storing lubricating oil;

a scroll assembly, the scroll assembly comprising:

a first scroll (5) located within the compressor housing; and

a second scroll (6) located within the compressor housing, wherein the first scroll and the second scroll cooperate to form a compression chamber (56) and the first scroll and the second scroll rotate together;

the actuating mechanism (7) is accommodated in the compressor shell and is used for driving the first scroll plate to rotate so as to drive the second scroll plate to rotate; and

an oiling screw rod (10), the upper end (101) of the oiling screw rod and the second scroll plate are connected in a matched mode, and the lower end (103) of the oiling screw rod extends into the oil pool (31).

2. The scroll compressor of claim 1, further comprising:

a bracket (4) mounted within the compressor housing;

a flange (8) supported on the bracket and supporting the first scroll and the second scroll, wherein the flange is connected to the first scroll;

the actuating mechanism (7) is used for driving the flange to rotate so as to drive the first scroll plate to rotate, and then the second scroll plate is driven to rotate.

3. The scroll compressor of claim 2, wherein the second scroll includes a first hub (61);

the scroll compressor further includes a crankshaft (9) located within the flange and cooperating with a first hub (61) of the second scroll.

4. The scroll compressor of claim 3, wherein the flange comprises:

a tray (81) located at the upper end of the flange;

a second hub (82) extending from the tray (81) to a lower end of the flange; and

a central hole (83) is arranged,

wherein the flange is connected to the first scroll through the tray,

the crankshaft has an outer step surface (95) and the second hub (82) of the flange has an inner step surface (84) opposite the outer step surface (95).

5. The scroll compressor of claim 4, wherein the crankshaft is generally cylindrical and has:

an axial through hole (91), in which the oiling screw is arranged, the central axis (O) of the oiling screw ₂ ) And a central axis (O) of the crankshaft ₁ ) Parallel and misaligned;

a lower section (93); and

an upper section (92) having an outer diameter greater than an outer diameter of the lower section forming the external step surface (95) at a junction of the upper and lower sections.

6. A scroll compressor according to claim 5, wherein an oil return hole (97) is provided on the upper end face (94) of the crankshaft, extending downwardly and through the upper and lower sections of the crankshaft, thereby forming an oil return passage (99, 100).

7. The scroll compressor of claim 5, further comprising a bearing, wherein the bearing is located on a same side of the compression chamber.

8. The scroll compressor of claim 7, wherein the bearing comprises:

a first sliding bearing (11) located between an inner peripheral surface of the upper section of the crankshaft and an outer peripheral surface of the first hub (61) of the second scroll, wherein a driving surface (111) is provided on the outer peripheral surface of the first sliding bearing, wherein a first pin groove (96) is provided on the inner peripheral surface of the upper section of the crankshaft, and at least one first pin (19) is embedded in the first pin groove and is engaged with the driving surface of the first sliding bearing; and/or

A second sliding bearing (12) located between the inner peripheral surface of the central hole (83) of the flange and the outer peripheral surface of the upper section (92) of the crankshaft; and/or

A third sliding bearing (13) located between the inner peripheral surface of the flange and the outer peripheral surface of the lower section of the crankshaft.

9. The scroll compressor of claim 7 or 8, wherein the bearing comprises:

a first thrust bearing (15) located between an inner step face (84) of the flange and an outer step face (95) of the crankshaft; and/or

A second thrust bearing (14) located between a lower surface of the second scroll and an upper surface (811) of the flange; and/or

A third thrust bearing (16) located between the bottom face of the flange and the bracket.

10. The scroll compressor of claim 9, wherein the first hub (61) of the second scroll has an inner bore (63) with an inner shape that interfits with an outer shape of the upper end of the upper oil screw to fit the upper end (101) of the upper oil screw into the inner bore (63) of the first hub (61) of the second scroll.

11. The scroll compressor of claim 10,

the outer peripheral surface of the upper end of the oiling screw is in interference fit with the inner peripheral surface of an inner hole (63) of a first hub (61) of the second scroll plate so as to prevent the oiling screw from rotating relative to the second scroll plate; or

The outer peripheral face of the upper end of the oiling screw rod comprises a first matching face, the inner peripheral face of an inner hole (63) of a first hub (61) of the second scroll plate comprises a second matching face, and when the upper end of the oiling screw rod is matched into the inner hole (63) of the first hub (61) of the second scroll plate, the first matching face and the second matching face are mutually attached to prevent the oiling screw rod from rotating relative to the second scroll plate.

12. The scroll compressor according to claim 10, wherein a second pin groove (104) is opened on an outer circumferential surface of an upper end of the oiling screw, a third pin groove (64) is opened on an inner circumferential surface of an inner hole (63) of the first hub (61) of the second scroll, and the oiling screw and the second scroll are fixedly connected by a second pin (21) fitted in the second pin groove and the third pin groove; or

An external thread (104') is provided on an outer circumferential surface of an upper end of the oiling screw, and an internal thread is provided on an inner circumferential surface of an inner bore (63) of the first hub (61) of the second scroll, the oiling screw and the second scroll being fixedly connected by a threaded connection between the external thread and the internal thread.

13. A scroll compressor according to claim 11 or 12, wherein a stopper (102) is provided on an outer peripheral surface of an upper end of the oiled screw, a retainer groove is provided on an inner peripheral surface of an inner hole (63) of the first hub (61) of the second scroll, and a retainer ring (20) is provided in the retainer groove,

when the upper end of the oiling screw rod is matched into the inner hole (63) of the first hub (61) of the second scroll plate, the stopping part is embedded into the blocking ring groove, and the blocking ring blocks the stopping part to prevent the upper end of the oiling screw rod from being separated from the inner hole (63) of the first hub (61) of the second scroll plate.

14. The scroll compressor of claim 5,

the oiling screw rod is integrally arranged into a threaded screw rod; or

The lower end (103) of the oiling screw is set into a threaded screw; or

The upper end and the lower end of the oiling screw rod are set to be threaded screw rods, and the middle section of the oiling screw rod is non-threaded so as to connect the upper end and the lower end of the oiling screw rod.

15. Scroll compressor according to claim 5, characterized in that at the lower end of the upper oil screw, the lower end of the crankshaft and the lower end of the bracket are provided a first radial through hole (106), a second radial through hole (88) and a third radial through hole (45), respectively, coaxial, through which a third pin (22) passes to prevent the upper oil screw, the crankshaft and the bracket from rotating relative to each other.

16. The scroll compressor of claim 15, further comprising a thin-walled sleeve (23) disposed between the outer peripheral face of the oiling screw and the inner peripheral face of the axial through hole of the crankshaft, and a lower edge of the thin-walled sleeve is above the third pin (22) to allow the thin-walled sleeve to rotate freely between the outer peripheral face of the oiling screw and the inner peripheral face of the axial through hole of the crankshaft.

17. The scroll compressor of claim 2, wherein the actuation mechanism comprises a disc motor including a stator (71) fixed within the compressor housing and a rotor (72) connected to the flange for driving rotation of the flange.

18. A scroll compressor according to claim 2, wherein a suction port (2001) is provided on the compressor housing,

the scroll compressor also includes a protective sleeve (17, 17', 17 ") having a wall positioned between the suction port and the scroll assembly.

19. The scroll compressor of claim 18,

the protective sleeve is of a complete cylindrical structure; or

The protective sleeve is of a partially cylindrical configuration.

20. The scroll compressor of claim 18 or 19,

the diameter of the protective sleeve is fixed in the axial direction of the protective sleeve; or

The diameter of the protective sleeve varies in the axial direction of the protective sleeve.

21. The scroll compressor according to claim 5, wherein a fourth radial through hole (89) and a fifth radial through hole (90) are provided on the crankshaft, one end openings of the fourth radial through hole and the fifth radial through hole are both located on an outer peripheral surface of the crankshaft, and the other end openings of the fourth radial through hole and the fifth radial through hole are both located on an inner peripheral surface of an axial through hole of the crankshaft.

22. The scroll compressor according to claim 6, wherein a sixth radial through hole (98) is provided in said crankshaft, one end opening of said sixth radial through hole being located on an outer peripheral surface of said crankshaft, the other end opening of said sixth radial through hole being communicated with said oil return passage.

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