Scroll Compressor

Abstract

A scroll compressor comprises a fixed bearing seat, a scroll fixed disk, a scroll orbiting disk, and an orbiting disk bearing seat. On the orbiting disk bearing seat, there are circumferentially three first bearing bores, and on the fixed bearing seat, there are circumferentially three second bearing bores. The front end of the locating crankshaft is rotatably connected inside the first bearing bore through the first bearing, and the rear end of the locating crankshaft is rotatably connected inside the second bearing bore through the second bearing. There is a through hole on the bottom face of the second bearing bore. The rear end of the locating crankshaft passes through the second bearing and is inserted inside the through hole. In addition, the end on which the locating crankshaft passes through the second bearing is screw connected with a locking nut.

Claims

1. A scroll compressor comprising: a fixed bearing seat (1); a scroll fixed disk (2); a scroll orbiting disk (3); an orbiting disk bearing seat (4); three first bearing bores (41) circumferentially on an end face of the orbiting disk bearing seat (4); three second bearing bores (11) corresponding to three first bearing bores (41) circumferentially on an end face of the fixed bearing seat (1); and a locating crankshaft (5) arranged between a corresponding first bearing bore (41) and a corresponding second bearing bore (11); wherein the scroll fixed disk (2) is fixed to the fixed bearing seat (1), and the orbiting disk bearing seat (4) is located inside the fixed bearing seat (1); wherein the scroll orbiting disk (3) is fixed to the orbiting disk bearing seat (4), and the scroll orbiting disk (3) matches the scroll fixed disk (2); wherein a front end of the locating crankshaft (5) is rotatably connected inside the first bearing bore (41) through a first bearing (42), and a rear end of the locating crankshaft (5) is rotatably connected inside the second bearing bore (11) through a second bearing (12); wherein there is a through hole (13) on a bottom face of the second bearing bore (11), passing through a rear end of the fixed bearing seat (1); wherein a rear end of the locating crankshaft (5) passes through the second bearing (12) and is inserted inside the through hole (13); wherein an end on which the locating crankshaft (5) passes through the second bearing (12) is screw connected with a locking nut (9) for locating the second bearing (12); and wherein a locating structure is arranged on the rear end of the locating crankshaft (5) to prevent the locating crankshaft (5) from rotating when the locking nut (9) is tightened.

2. The scroll compressor as claimed in claim 1 wherein on an outer wall of the rear end of the locating crankshaft (5), there are circumferentially external threads, and the locking nut (9) fits the external threads of the locating crankshaft (5); and wherein when the locking nut (9) is tightened, the locking nut (9) presses against an inner end face of an inner race of the second bearing (12).

3. The scroll compressor as claimed in claim 2 wherein the locking nut (9) is an external hex nut.

4. The scroll compressor as claimed in claim 2 wherein several operation holes (91) are arranged circumferentially on a rear end face of the locking nut (9).

5. The scroll compressor as claimed in claim 2 wherein the locating structure comprises a locating part (59) located on a rear end face of the locating crankshaft (5); and wherein a straight slot (56), a cross slot (57), or several locating holes (58) are arranged on an end face of the locating part (59).

6. The scroll compressor as claimed in claim 2 wherein the locating structure comprises a locating part (59) located on a rear end face of the locating crankshaft (5); wherein the locating part (59) is flat or is a column with a polygonal cross section; and wherein the locating part (59) stretches out of the through hole (13) or the locating part (59) is located outside the through hole (13).

7. The scroll compressor as claimed in claim 2 wherein the locating crankshaft (5) comprises a disk-shaped crank arm (51); wherein perpendicularly, there is a columnar first transmission part (52) on a first side of the crank arm (51), and, perpendicularly, there is a columnar second transmission part (53) on a second side of the crank arm (51); wherein the first transmission part (52) and the second transmission part (53) are arranged in parallel but eccentrically; and wherein the first transmission part (52) is connected to the first bearing (42), and the second transmission part (53) is connected to the second bearing (12).

8. The scroll compressor as claimed in claim 7 wherein there is an abutting edge (54) on a side of the crank arm (51), surrounding the second transmission part (53); and wherein when the locking nut (9) is tightened, an outer end face of an inner race of the second bearing (12) presses against an end face of the abutting edge (54).

9. The scroll compressor as claimed in claim 8 wherein a second locking plate (8) is fixed to the fixed bearing seat (1), and an adjusting gasket (6) is arranged between the second bearing (12) and a bottom of the second bearing bore (11); wherein the second locking plate (8) presses against an outer end face of an outer race of the second bearing (12); and wherein under an action of the second locking plate (8), an inner end face of the outer race of the second bearing (12) presses against the adjusting gasket (6).

10. The scroll compressor as claimed in claim 7 wherein a first locking plate (7) is fixed to the orbiting disk bearing seat (4), and the first locking plate (7) presses against an outer end face of an outer race of the first bearing (42); and wherein there is an abutting boss (55) on a side of the crank arm (51), surrounding the first transmission part (52), and the abutting boss (55) presses against an outer end face of an inner race of the first bearing (42).

11. The scroll compressor as claimed in claim 7 wherein there are several long stripped heat sinks (31) on a back of the scroll orbiting disk (3); wherein the heat sinks (31) are arranged in a same direction, and air ducts (33) are formed in between two adjacent heat sinks (31); wherein each heat sink (31) is bended into a wave shape and the wave-shaped heat sink (31) has several peaks (322) and several troughs (323) in a lengthwise direction; wherein locations of the peaks (322) and the troughs (323) in two adjacent heat sinks (31) are aligned; and wherein in any heat sink (31), there is at least one peak (322) located in a triangular zone (36), which is enclosed by a corresponding peak (322) on the heat sink (31) above and two troughs (323) on two sides of that peak (322) on that same heat sink.

12. The scroll compressor as claimed in claim 11 wherein there is a first prop (324), which is columnar and perpendicular to the back of the scroll orbiting disk (3), in the peak (322) or trough (323) area of the heat sink (31), and an outer diameter of the first prop (324) is greater than a thickness of the heat sink (31).

13. The scroll compressor as claimed in claim 12 wherein on the back of the scroll orbiting disk (3), there are three columnar second props (325) perpendicular to the scroll orbiting disk (3); and wherein the second props (325) are located in the heat sinks (31) and lines connecting the three second props (325) form an isosceles triangle or equilateral triangle.

14. The scroll compressor as claimed in claim 2 wherein several operation dents (92) are arranged circumferentially along an edge of the rear end face of the locking nut (9).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 is a perspective view of one embodiment of the scroll compressor while the motor is not installed yet.

[0028] FIG. 2 is a sectional view of one embodiment of the scroll compressor.

[0029] FIG. 3 is a detailed view of Section A in FIG. 2.

[0030] FIG. 4 is a perspective view of one embodiment of the locating crankshaft.

[0031] FIG. 5 is a perspective view of one embodiment of the locating crankshaft while the locking nut is an external hex nut.

[0032] FIG. 6 is a perspective view of one embodiment of the locating crankshaft while operation holes are arranged on the locking nut.

[0033] FIG. 7 is a perspective view of one embodiment of the locating crankshaft while operation dents are arranged on the locking nut.

[0034] FIG. 8 is a perspective view of one embodiment of the locating crankshaft while a cross slot is arranged on the locating part.

[0035] FIG. 9 is a perspective view of one embodiment of the locating crankshaft while a locating hole is arranged on the locating part.

[0036] FIG. 10 is a perspective view of one embodiment of the locating crankshaft while the locating part is flat.

[0037] FIG. 11 is a perspective view of one embodiment of the locating crankshaft while the cross section of the locating part is a hexagon.

[0038] FIG. 12 is a perspective view of one embodiment of the locating crankshaft while an inner hex hole is arranged on the locating part.

[0039] FIG. 13 is a perspective view of one embodiment of the scroll orbiting disk.

[0040] FIG. 14 is a rear view of FIG. 13.

DETAILED DESCRIPTION OF THE INVENTION

[0041] The embodiments of this invention will be described below and the technical solutions of the invention will be further illustrated in connection with the accompanying figures. However, the present invention shall not be limited to these embodiments.

First Embodiment

[0042] As shown in FIG. 1, FIG. 2, and FIG. 3, a scroll compressor comprises a fixed bearing seat (1), a scroll fixed disk (2), a scroll orbiting disk (3) and an orbiting disk bearing seat (4). The scroll fixed disk (2) is fixed to the fixed bearing seat (1), and the orbiting disk bearing seat (4) is located inside the fixed bearing seat (1). The scroll orbiting disk (3) is fixed to the orbiting disk bearing seat (4), and the scroll orbiting disk (3) matches the scroll fixed disk (2). On the end face of the orbiting disk bearing seat (4), there are circumferentially three equally spaced first bearing bores (41), and on the end face of the fixed bearing seat (1), there are circumferentially three equally spaced second bearing bores (11). The second bearing bores (11) correspond with the first bearing bores (41) one-to-one. A locating crankshaft (5) is arranged between the corresponding first bearing bore (41) and second bearing bore (11). The front end of the locating crankshaft (5) is rotatably connected inside the first bearing bore (41) through the first bearing (42), and the rear end of the locating crankshaft (5) is rotatably connected inside the second bearing bore (11) through the second bearing (12). There are both two first bearings (42) and two second bearings (12) and they are paired bearings. There is a through hole (13) on the bottom face of the second bearing bore (11), and the through hole (13) passes through the rear end of the fixed bearing seat (1). The rear end of the locating crankshaft (5) passes through the second bearing (12) and is inserted inside the through hole (13). In addition, the end on which the locating crankshaft (5) passes through the second bearing (12) is screw connected with a locking nut (9). Specifically, on the outer wall of the rear end of the locating crankshaft (5), there are circumferentially external threads, and the locking nut (9) fits the external threads of the locating crankshaft (5). When the locking nut (9) is tightened, the locking nut (9) presses against the inner end face of the inner race of the second bearing (12). A locating structure is also arranged on the rear end of the locating crankshaft (5) to prevent the locating crankshaft (5) from rotating when the locking nut (9) is tightened.

[0043] Specifically, as shown in FIG. 4 and FIG. 5, the locking nut (9) is an external hex nut. An external hex nut is a nut of a conventional structure, and the operation is convenient. During the real manufacturing process, the locking nut (9) may also be machined into a structure with the cross section of a polygon, and the locking nut (9) can be turned by clamping its outer walls. The locating structure comprises a locating part (59) on the end face of the locating crankshaft (5). A straight slot (56) is arranged on the end face of the locating part (59). The locating crankshaft (5) can be positioned through a screwdriver.

[0044] The locating crankshaft (5) comprises a disk-shaped crank arm (51). Perpendicularly, there is a columnar first transmission part (52) on one side of the crank arm (51). There is an abutting boss (55) on the side of the crank arm (51), surrounding the first transmission part (52). The first locking plate (7) is fixed to the orbiting disk bearing seat (4), and the first locking plate (7) presses against the outer end face of the outer race of the first bearing (42), axially positioning the outer race of the first bearing (42). The abutting boss (55) presses against the outer end face of the inner race of the first bearing (42), axially positioning the inner race of the first bearing (42). This achieves positioning the first bearing (42), and makes the assembly more precise. Perpendicularly, there is a columnar second transmission part (53) on the other side of the crank arm (51). The first transmission part (52) and the second transmission part (53) are arranged in parallel but eccentrically. There is an abutting edge (54) on the side of the crank arm (51), surrounding the second transmission part (53). When the locking nut (9) is tightened, the outer end face of the inner race of the second bearing (12) presses against the end face of the abutting edge (54). The abutting edge (54), combined with the locking nut (9), clamping the inner end of the second bearing (12), so as to axially position the inner race of the second bearing (12). The second locking plate (8) is fixed to the fixed bearing seat (1), and an adjusting gasket (6) is arranged between the second bearing (12) and the bottom face of the second bearing bore (11). The second locking plate (8) presses against the outer end face of the outer race of the second bearing (12). Under the action of the second locking plate (8), the inner end face of the outer race of the second bearing (12) presses against the adjusting gasket (6).

[0045] At assembly time, the scroll orbiting disk (3) is fixed and installed onto the orbiting disk bearing seat (4) in advance. There are three locating crankshafts (5). The first locking plate (7) and the second locking plate (8) are sleeved over both ends of the locating crankshaft (5). Two first bearings (42) are sleeved over one end of the locating crankshaft (5), and two second bearings (12) are sleeved over the other end of the locating crankshaft (5), and then two first bearings (42) are pressed into the first bearing bores (41) on the orbiting disk bearing seat (4). The first locking plate (7) is fixed to the orbiting disk bearing seat (4), making the first locking plate (7) presses the first bearing (42) firm. The orbiting disk bearing seat (4), the first bearings (42), the first locking plate (7), the locating crankshaft (5) and the second bearings (12) are installed in place, and the clearance errors among them are eliminated. Since all the components mentioned above are installed axially, the assembly process is relatively simple and the assembly precision is relatively high. Then the distance from the blades of the scroll orbiting disk (3) to the end face of the second bearing (12) is measured. According to the measurement and the designed distance from the scroll fixed disk (2) to the fixed bearing seat (1), an accurate distance from the end face of the second bearing (12) to the bottom face of the second bearing bore (11) after the scroll orbiting disk (3) and the scroll fixed disk (2) are precisely assembled can be figured out. Hence, an adjusting gasket (6) of an appropriate thickness will be selected. This adjusting gasket (6) is placed inside the second bearing bore (11). The locating crankshaft (5) will be maneuvered to allow the second bearings (12) on the locating crankshafts (5) to be aligned with and pressed into the second bearing bores (11). The second locking plate (8) is fixed to the fixed bearing seat (1). This makes the second locking plate (8) press the second bearing (12) firm, and the second bearing (12) press the adjusting gasket (6) firm, and achieves a higher fit precision between the scroll orbiting disk (3) and the scroll fixed disk (2) after the assembly process. At this point, the scroll orbiting disk (3) can rotate on the fixed bearing seat (1), and three locating crankshafts (5) can synchronically rotate as well. The ends of the locating crankshafts (5) can insert into the through holes (13). Locking nuts (9) are screwed onto the locating crankshafts (5). In operation, the locating crankshaft (5) is circumferentially located by matching a slot screwdriver with the straight slot (56) of the locating crankshaft (5), and then the external hex nut is clamped with and tightened by a wrench to allow the locking nuts (9) to press and locate onto the second bearings (12), achieving a precise positioning of the scroll orbiting disk (3). During the locating operation, this can effectively prevent the locating crankshaft (5) from rotating, making the operation easier and more convenient, and hence simplifying the whole assembly process.

[0046] As shown in FIG. 13 and FIG. 14, the scroll is arranged on the front face of the scroll orbiting disk (3) in a spiral manner. There are several long stripped heat sinks (31) on the back of the scroll orbiting disk (3), and the widthwise direction of the heat sink (31) is perpendicular to the back of the scroll orbiting disk (3). These heat sinks (31) are arranged in the same direction, and an air duct (33) is formed in between two adjacent heat sinks (31). Both ends of the heat sink (31) extend to the outer rim of the scroll orbiting disk (3). There is a flat and straight inlet part (326) on one end of the heat sink (31), and a flat and straight outlet part (327) on the other end. The inlet part (326) and the outlet part (327) on one heat sink (31) are arranged symmetrically. An air inlet (331) connected to the air duct (33) is formed in between the inlet parts (326) of two adjacent heat sinks (31), and an air outlet (332) connected to the air duct (33) is formed in between the outlet parts (327) of two adjacent heat sinks (31). A fan is also arranged on the scroll compressor, and the air flow generated by the fan, as well as the natural wind, can blow the sides of the scroll orbiting disk (3). The air flow blows into one end of the air duct (33), and out of the other end. During the process the air flow passing through the air duct (33), the heat on the scroll orbiting disk (3) and the heat sinks (31) can be taken away, and hence the temperature will be reduced. Also, reducing the temperature of the scroll orbiting disk (3) helps prevent the scroll orbiting disk (3) from deforming because of high temperature.

[0047] The thickness of the heat sink (31) gradually increases from the top to the bottom. The connecting lines between the peak (322) of the heat sink (31) and its two adjacent troughs (323) are straight lines, and there is an angle between the lines connecting the peak (322) and its two adjacent troughs (323). This angle determines the bending degree of the wave-shaped heat sink (31). When this angle is too big, the stiffening effect is not significant. However, when the angle is too small, the resistive force against the air flow is also big. This is bad for the air flow to pass through. When the angle is 90°, the heat dissipation effect and stiffening effect of the scroll orbiting disk (3) is fairly good. The wave-shaped heat sink (31) has several peaks (322) and several troughs (323) in the lengthwise direction. The extending direction of the heat sinks (31) is the transversal direction, and the arranging direction of several heat sinks (31) is the longitudinal direction. Among of them, longer heat sinks (31) can reinforce the strength of the scroll orbiting disk (3) in the transversal direction. The direction of the line connecting the peak (322) and the adjacent trough (323) is inclined relative to the transversal direction of the scroll orbiting disk (3), to stiffen the scroll orbiting disk (3) in the longitudinal direction. The locations of peaks (322) and troughs (323) in two adjacent heat sinks (31) are aligned. In any heat sink (31), there is at least one peak (322) located in a triangular zone (36), which is enclosed by the corresponding peak (322) on the heat sink (31) above and the two troughs (323) on two sides of that peak (322) on that same heat sink (31). Therefore, in one transversal cross section, there are several heat sinks (31) to reinforce the strength of the scroll orbiting disk (3). The stiffening effect is significant, so as to prevent the scroll orbiting disk (3) from deforming. Therefore, the fit errors between the scroll orbiting disk (3) and the bearing and between the scroll orbiting disk (3) and the scroll fixed disk (2) will not be affected.

[0048] The heat sink (31) has the first prop (324), which is columnar and perpendicular to the back of the scroll orbiting disk (3), in either the peak (322) or the trough (323) area. The outer diameter of the first prop (324) is greater than the thickness of the heat sink (31), and the outer diameter of the first prop (324) gradually increases from the top to the bottom. The top end of the first prop (324) is flush with the top edge of the heat sinks (31), stiffening the heat sinks (31) and the scroll orbiting disk (3). On the back of the scroll orbiting disk (3), there are three columnar second props (325) perpendicular to it. The second props (325) are located in the heat sinks (31). Similarly, the outer diameter of the second prop (325) also increases from the top to the bottom, and the outer diameter of the second prop (325) is greater than the outer diameter of the first prop (324). Lines connecting the three second props (325) form a triangle, and thus play the role of supporting frame for the scroll orbiting disk (3). In this embodiment, lines connecting the three second props (325) form an equilateral triangle, achieving a uniform stiffening effect of the scroll orbiting disk (3).

Second Embodiment

[0049] The structure of this scroll compressor is basically the same as that of the first embodiment. The differences are:

[0050] As shown in FIG. 6, several operation holes (91) are circumferentially arranged on the rear end face of the locking nut (9). This structure is designed to implement the turning operation by pressing the end face of the locking nut (9) firm. It is sufficient to do so by setting wrenches or other tools on the end of the locating crankshaft (5) and attaching them to the locking nut (9).

Third Embodiment

[0051] The structure of this scroll compressor is basically the same as that of the first embodiment. The differences are:

[0052] As shown in FIG. 7, several operation dents (92) are circumferentially arranged on the end face of the locking nut (9). This structure is designed to implement the turning operation by pressing the end face of the locking nut (9) firm. It is sufficient to do so by setting wrenches or other tools on the end of the locating crankshaft (5) and attaching them to the locking nut (9).

Fourth Embodiment

[0053] The structure of the scroll compressor is basically the same as that of the first embodiment. The differences are:

[0054] As shown in FIG. 8, the locating structure comprises a locating part (59) on the end face of the locating crankshaft (5). A cross slot (57) is arranged on the end face of the locating part (59). The locating crankshaft (5) can be circumferentially positioned through a Phillips screwdriver.

Fifth Embodiment

[0055] The structure of the scroll compressor is basically the same as that of the first embodiment. The differences are:

[0056] As shown in FIG. 9, the locating structure comprises a locating part (59) on the end face of the locating crankshaft (5). Several locating holes (58) are arranged on the end face of the locating part (59). The locating crankshaft (5) can be circumferentially positioned by matching screwdrivers or other tools with several locating holes (58).

Sixth Embodiment

[0057] The structure of the scroll compressor is basically the same as that of the first embodiment. The differences are:

[0058] As shown in FIG. 10, the locating structure comprises a locating part (59) on the rear end face of the locating crankshaft (5). The locating part (59) is flat, and the outer end of the locating part (59) is outside the through hole (13). In this embodiment, the locating part (59) is outside the through hole (13), making the locating part (59) to be easily clamped.

Seventh Embodiment

[0059] The structure of the scroll compressor is basically the same as that of the first embodiment. The differences are:

[0060] As shown in FIG. 11, the locating structure comprises a locating part (59) on the rear end face of the locating crankshaft (5). The cross section of the locating part (59) is a polygon, and the outer end of the locating part (59) is outside the through hole (13). In this embodiment, the locating part (59) is outside the through hole (13), and the cross section of the locating part (59) is a hexagon, making the locating part (59) to be easily clamped.

Eighth Embodiment

[0061] The structure of the scroll compressor is basically the same as that of the first embodiment. The differences are:

[0062] As shown in FIG. 12, the locating structure comprises a locating part (59) on the end face of the locating crankshaft (5). An inner hex hole (591) is arranged on the end face of the locating part (59) allowing the locating part (59) to be circumferentially positioned by an Allen wrench or other tools.

[0063] The description of the preferred embodiments thereof serves only as an illustration of the scope of the invention. It will be understood by those skilled in the art that various changes or supplements in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

[0064] Although the terms of Fixed Bearing Seat (1), Second Bearing Bore (11), Second Bearing (12) and etc. are often used herein, it does not exclude the possibility to use any other terms. Using such terms is only to describe or explain the scope of the present invention more conveniently. Any additional restrictions are contrary to the present invention.

LIST OF REFERENCE NUMERALS

[0065] 1 Fixed Bearing Seat [0066] 11 Second Bearing Bore [0067] 12 Second Bearing [0068] 13 Through Hole [0069] 14 Scroll Fixed Disk [0070] 15 Scroll Orbiting Disk [0071] 31 Heat Sink [0072] 322 Peak [0073] 323 Trough [0074] 324 First Prop [0075] 325 Second Prop [0076] 326 Inlet Part [0077] 327 Outlet Part [0078] 33 Air Duct [0079] 331 Air Inlet [0080] 332 Air Outlet [0081] 36 Zone [0082] 4 Orbiting Disk Bearing Seat [0083] 41 First Bearing Bore [0084] 42 First Bearing [0085] 5 Locating Crankshaft [0086] 51 Crank Arm [0087] 52 First Transmission Part [0088] 53 Second Transmission Part [0089] 54 Abutting Edge [0090] 55 Abutting Boss [0091] 56 Straight Slot [0092] 57 Cross Slot [0093] 58 Locating Hole [0094] 59 Locating Part [0095] 591 Inner Hex Hole [0096] 6 Adjusting gasket [0097] 7 First Locking Plate [0098] 8 Second Locking Plate [0099] 9 Locking Nut [0100] 91 Operation Hole [0101] 92 Operation Dent