JP6425744B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor for compressing a working gas.

  Conventionally, for example, a scroll compressor is known as a compressor used for a refrigerator or an air conditioner. The scroll compressor has a fixed scroll and a rocking scroll, and the rocking scroll performs a revolving orbiting motion with respect to the fixed scroll. The fixed scroll and the oscillating scroll are members in which spiral wraps are formed on surfaces facing each other, and a compression chamber is formed by both wraps. Then, the oscillating scroll oscillates to change the internal volume of the compression chamber, thereby compressing the working gas flowing into the compression chamber. Here, the lower surface of the oscillating scroll is a thrust lower surface for supporting a thrust load, and a thrust bearing is provided on the thrust lower surface.

  Patent Document 1 discloses a hermetic compressor in which an annular oil supply groove is formed on the thrust lower surface of the oscillating scroll. In Patent Document 1, the oil in the space formed between the rocking scroll and the frame supporting the rocking scroll enters the oil supply groove by the rocking of the rocking scroll. Then, the oil that has entered the oil supply groove flows from the oil supply groove into the thrust bearing provided on the upper surface of the frame by the rocking of the rocking scroll. Thus, Patent Document 1 attempts to lubricate the thrust bearing on the upper surface of the frame with the oil in the space formed between the oscillating scroll and the frame.

Patent No. 3154623 gazette

  However, in the closed type compressor disclosed in Patent Document 1, the oil in the space formed between the rocking scroll and the frame is the oil stored in the space after lubricating the rocking bearing etc. Because the amount of oil is not constant.

  The present invention has been made against the background described above, and provides a compressor that stably supplies oil between the swing scroll and the frame.

A compressor according to the present invention comprises an outer shell, a shell having an oil reservoir formed at a lower portion, an oil pump housed in the shell and sucking up oil from the oil reservoir, and a motor provided inside the shell; A compression unit provided inside the shell and driven by a motor to compress the working gas, a frame fixed to the shell and supporting the compression unit, and an oil supported by the frame and through which oil drawn up by the oil pump flows A passage is formed inside, and the shaft portion connecting the motor and the compression portion to transfer the rotational force of the motor to the compression portion, the compression portion is a fixed scroll fixed inside the shell, and the shaft portion An oscillating scroll connected to the upper end portion of the movable scroll and forming a compression chamber for compressing the working gas together with the fixed scroll, the oil scroll and the thrust lower surface of the oscillating scroll being connected to the oscillating scroll; An oil supply hole for supplying oil flowing in the oil passage is formed between the lower surface and the opposite surface of the frame facing the thrust lower surface, and an annular oil supply groove passing through the oil supply hole is formed on the thrust lower surface. The rocking scroll has a spiral wrap portion forming a compression chamber, and a plate-like base plate portion on which the lap portion is mounted. A through hole is formed to connect with the upper surface of the part and supply oil to the compression chamber.

  According to the present invention, the rocking scroll is connected to the oil passage and the thrust lower surface of the rocking scroll, and oil flowing in the oil passage is formed between the thrust lower surface and the opposing surface of the frame facing the thrust lower surface. An oil supply hole for supplying is formed. For this reason, oil can be stably supplied between the oscillating scroll and the frame.

BRIEF DESCRIPTION OF THE DRAWINGS It is an axial sectional view which shows the compressor 1 which concerns on Embodiment 1 of this invention. FIG. 3 is an axial sectional view showing a rocking scroll 40 according to Embodiment 1 of the present invention. It is a bottom view which shows rocking scroll 40 in Embodiment 1 of the present invention. It is an axial sectional view showing oil supply groove 54 in Embodiment 1 of the present invention. It is an axial sectional view showing the flow of oil of compressor 1 concerning Embodiment 1 of the present invention. FIG. 10 is an axial sectional view showing a rocking scroll 40 according to Embodiment 2 of the present invention. It is a top view which shows the rocking | swiveling scroll 40 in Embodiment 2 of this invention. FIG. 10 is an axial cross-sectional view showing a rocking scroll 40 according to Embodiment 3 of the present invention.

  Hereinafter, embodiments of a compressor according to the present invention will be described with reference to the drawings. The present invention is not limited by the embodiments described below. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1
FIG. 1 is a cross-sectional view showing a compressor 1 according to Embodiment 1 of the present invention. The compressor 1 will be described based on FIG. The compressor 1 is, for example, a scroll compressor that sucks and compresses a refrigerant circulating in a refrigeration cycle, and discharges the refrigerant in a high temperature and high pressure state. As shown in FIG. 1, the compressor 1 has a shell 2, an oil pump 3, a motor 4, a compression unit 5, a frame 6, and a shaft 7. Furthermore, the compressor 1 includes a suction pipe 11, a discharge pipe 12, a discharge chamber 13, a muffler 14, an Oldham ring 15, a slider 16, a sleeve 17, a first balancer 18, and a second balancer. A sub-frame 20 and an oil discharge pipe 21 are provided.

  The shell 2 constitutes an outer shell of the compressor 1, and an oil reservoir 3a is formed in the lower portion. Also, the shell 2 has, for example, a bottomed cylindrical shape, and the upper portion is closed by the dome-shaped upper shell 2a. The shell 2 is mounted on the lower shell 2b. The oil pump 3 is accommodated in the shell 2 and sucks the oil from the oil reservoir 3a. The oil pump 3 is provided at the lower part of the shell 2. Then, the oil pump 3 supplies the oil sucked from the oil reservoir 3 a to the bearing portion inside the compressor 1 and the Oldham ring 15. The oil lubricates and cools the bearing portion and the Oldham ring 15.

  The motor 4 is provided inside the shell 2, for example, installed between the frame 6 and the sub-frame 20, and rotates the shaft 7. The motor 4 has a rotor 4a and a stator 4b. The rotor 4 a is provided on the inner peripheral side of the stator 4 b and is attached to the shaft 7. The rotor 4 a rotates the shaft 7 when the rotor 4 a rotates. The stator 4 b rotates the rotor 4 a by the power supplied from the inverter (not shown).

  The compression unit 5 is provided inside the shell 2 and is driven by the motor 4 to compress the working gas. The compression unit 5 has a fixed scroll 30 and a rocking scroll 40. The fixed scroll 30 is fixed to the inside of the shell 2 and causes the compressed working gas to flow out to the discharge chamber 13. The rocking scroll 40 revolves around the fixed scroll 30, and the rotation movement is restricted by the Oldham ring 15. The fixed scroll 30 and the rocking scroll 40 are members in which spiral fixed wrap portions 31 and wrap portions 41 (see FIG. 7) are formed on surfaces facing each other, and the fixed wrap portions 31 and the wrap portions 41 A compression chamber 5a is formed in the space where the two mesh with each other. The rocking scroll 40 is rocked by the shaft portion 7, and the working gas is compressed in the formed compression chamber 5a.

  The frame 6 is fixed to the shell 2 and accommodates the compression unit 5, and for example, rotatably supports the shaft unit 7 via the main bearing 8a. A suction port 6 a is formed in the frame 6, and the working gas flows into the compression unit 5 through the suction port 6 a. The shaft portion 7 is supported by the frame 6 and an oil passage 7a through which the oil sucked up by the oil pump 3 flows is formed in the inside, and the motor 4 and the compression portion 5 are connected to rotate the motor 4 It is transmitted to the compression unit 5.

  The suction pipe 11 is provided on the side of the shell 2 and is a pipe that sucks working gas into the inside of the shell 2. The discharge pipe 12 is provided at the upper portion of the shell 2 and is a pipe that discharges the working gas to the outside of the shell 2. The discharge chamber 13 is provided in the upper part of the compression unit 5 and accommodates the working gas flowing from the compression unit 5. The muffler 14 is provided above the discharge chamber 13 and suppresses pulsation of the working gas discharged from the discharge chamber 13.

  The Oldham ring 15 is an annular member attached to the rocking scroll 40 and regulates the rotational movement of the rocking scroll 40. The Oldham ring 15 is attached to an Oldham groove 15 a (see FIG. 3) formed in the thrust lower surface 40 a of the oscillating scroll 40. The slider 16 is a cylindrical member attached to the outer peripheral surface of the upper portion of the shaft portion 7, and is located on the inner surface of the lower portion of the oscillating scroll 40. That is, the rocking scroll 40 is attached to the shaft 7 via the slider 16, and the rocking scroll 40 also rotates with the rotation of the shaft 7. A swing bearing 8 c is provided between the swing scroll 40 and the slider 16. The sleeve 17 is a cylindrical member provided between the frame 6 and the main bearing 8a, and maintains the airtightness of the frame 6 and the main bearing 8a.

  The first balancer 18 is attached to the shaft 7 and located between the frame 6 and the rotor 4a. The first balancer 18 offsets the unbalance caused by the oscillating scroll 40 and the slider 16. The first balancer 18 is accommodated in the balancer cover 18a. Further, the second balancer 19 is attached to the shaft portion 7, is located between the rotor 4 a and the sub frame 20, and is attached to the lower surface of the rotor 4 a. The second balancer 19 cancels the unbalance caused by the oscillating scroll 40 and the slider 16.

  The sub-frame 20 is provided below the motor 4 inside the shell 2 and rotatably supports the shaft 7 via the sub bearing 8 b. The oil discharge pipe 21 is a pipe that connects the space between the frame 6 and the oscillating scroll 40 and the space between the frame 6 and the sub-frame 20. The oil discharge pipe 21 causes excess oil out of the oil flowing in the space between the frame 6 and the oscillating scroll 40 to flow out into the space between the frame 6 and the sub-frame 20. The oil that has flowed into the space between the frame 6 and the sub-frame 20 passes through the sub-frame 20 and returns to the oil sump 3a.

  Next, the compression unit 5 will be described in detail. The compression unit 5 includes the fixed scroll 30 and the oscillating scroll 40 as described above. The fixed scroll 30 is fixed to the inside of the shell 2 and the outer peripheral edge portion is mounted on the top of the frame 6. The oscillating scroll 40 is connected to the upper end of the shaft 7. The oil passage 7a and the thrust lower surface 40a of the rocking scroll 40 are connected to the rocking scroll 40, and the oil path 7a is formed between the thrust lower surface 40a and the opposing surface of the frame 6 facing the thrust lower surface 40a. The oil supply hole 50 which supplies the oil which distribute | circulates is formed. The facing surface of the frame 6 is a thrust bearing 9 for supporting a thrust load, and is formed, for example, by heat treating the facing surface of the frame 6. Further, the present invention is not limited to this, and the frame 6 may have the thrust bearing 9 which is a separate member, or may be used as the thrust bearing 9 by heat-treating the thrust lower surface 40a.

  FIG. 2 is an axial sectional view showing the oscillating scroll 40 according to the first embodiment of the present invention. Next, the oscillating scroll 40 will be described in detail. The orbiting scroll 40 has a spiral wrap 41 (see FIG. 3) formed on the surface facing the fixed scroll 30, a cylindrical boss 42 connected to the shaft 7, and a wrap 41. And a disk-shaped base plate portion 43 connecting the boss portion 42. The upper end portion of the oil passage 7 a in the shaft portion 7 does not reach the deepest portion of the boss portion 42, and an internal space 42 a is formed inside the boss portion 42.

  The amount of oil flowing into the oil supply hole 50 can be changed by changing the volume of the oil supply hole 50 appropriately. The fuel hole 50 is constituted of, for example, a horizontal hole 51 and a vertical hole 52. The lateral hole 51 has one end connected to the oil passage 7a and, for example, extends radially from the upper end of the oil passage 7a. The vertical holes 52 connect the horizontal holes 51 and the thrust lower surface 40 a, and extend in the axial direction from the horizontal holes 51, for example. In this case, the amount of oil flowing into the oil supply hole 50 can be changed by changing the volume of the horizontal hole 51 or the vertical hole 52 appropriately. Further, the lateral hole 51 extends to and penetrates the side surface 40 b of the oscillating scroll 40, and the penetrating portion is closed by the plug 53. The stopper 53 is, for example, a screw.

  FIG. 3 is a bottom view showing the oscillating scroll 40 according to the first embodiment of the present invention. As shown in FIG. 3, in the thrust lower surface 40a, an annular oil supply groove 54 coaxial with the swing scroll 40 and passing through the oil supply hole 50 is formed. The oil that has flowed in from the oil supply hole 50 spreads around the entire circumference of the oil supply groove 54 by the rocking motion of the rocking scroll 40 (arrow in FIG. 3). In FIG. 3, the thrust bearing 9 is indicated by a two-dot chain line.

Here, the dimensions of the oil supply groove 54 will be described. The inner diameter of the feed groove 54 is rin, the outer diameter of the feed groove 54 is rout, the inner diameter of the thrust bearing 9 is Rin, the outer diameter of the thrust bearing 9 is Rout, and the eccentricity radius when the swing scroll 40 swings is rr. Do. In this case, the inner diameter rin of the oil supply groove 54 is larger than the value obtained by adding the eccentricity radius rr when the rocking scroll 40 rocks to the inner diameter Rin of the thrust bearing 9. That is, the lower limit value of the inner diameter rin of the oil supply groove 54 is rin> Rin + rr. Thus, the inner peripheral edge portion of the oil supply groove 54 does not protrude from the inner peripheral edge portion of the thrust bearing 9 even if the rocking scroll 40 swings. Further, the inner diameter rin of the oil supply groove 54 is smaller than a value obtained by adding a value twice the eccentricity radius rr when the swing scroll 40 swings to the inner diameter Rin of the thrust bearing 9 . That is, the upper limit value of the inner diameter rin of the oil supply groove 54 is rin < Rin + 2 rr. Thereby, the inner peripheral edge portion of the oil supply groove 54 reaches the inner peripheral edge portion of the thrust bearing 9 .

Further, the outer diameter rout of the oil supply groove 54 is smaller than a value obtained by subtracting the eccentricity radius rr when the oscillating scroll 40 oscillates from the outer diameter Rout of the thrust bearing 9. That is, the upper limit value of the outer diameter rout of the oil supply groove 54 is rout <Rout−rr. Thus, the outer peripheral edge portion of the oil supply groove 54 does not protrude from the outer peripheral edge portion of the thrust bearing 9. Furthermore, the outer diameter rout of the oil supply groove 54 is larger than a value obtained by subtracting twice the value of the eccentricity radius rr when the rocking scroll 40 rocks from the outer diameter Rout of the thrust bearing 9 . That is, the lower limit value of the outer diameter rout of the oil supply groove 54 is rout> Rout −2rr. Thus, the outer peripheral edge portion of the oil supply groove 54 reaches the outer peripheral edge portion of the thrust bearing 9 .

  FIG. 4 is an axial sectional view showing the oil supply groove 54 in the first embodiment of the present invention, and is an AA sectional view of FIG. 3. As shown in FIG. 4, in the rocking scroll 40, the angle between the wall surface 54a of the oil supply groove 54 and the thrust lower surface 40a is an obtuse angle. In the first embodiment, the oil supply groove 54 has a trapezoidal cross section, and the width is narrowed from the thrust lower surface 40 a side to the upper surface 40 c side of the oscillating scroll 40.

  Next, the flow of the working gas inside the compressor 1 will be described. The working gas is sucked from the outside of the compressor 1 through the suction pipe 11 and first flows into the space between the frame 6 and the motor 4. The working gas flowing into the space between the frame 6 and the motor 4 flows into the compression unit 5 through the suction port 6 a formed in the frame 6. The working gas flowing into the compression unit 5 is compressed by the compression unit 5. The compressed working gas is discharged from the fixed scroll 30 and stored in the discharge chamber 13. Thereafter, the working gas flowing out of the discharge chamber 13 passes through the muffler 14 and is discharged from the discharge pipe 12 to the outside of the compressor 1.

  FIG. 5 is an axial sectional view showing the flow of oil of the compressor 1 according to Embodiment 1 of the present invention. Next, the flow of oil inside the compressor 1 will be described. In FIG. 5, the flow of oil is indicated by a solid arrow. As shown in FIG. 5, the oil sucked from the oil reservoir 3 a by the oil pump 3 flows into an oil passage 7 a formed inside the shaft 7. A portion of the oil flowing into the oil passage 7a lubricates the sub bearing 8b through the radially formed flow passage. Then, the oil that has lubricated the sub bearing 8 b passes through the sub-frame 20 and returns to the oil reservoir 3 a.

  Further, part of the oil flowing into the oil passage 7a lubricates the main bearing 8a through the radially formed passage. The oil lubricating the main bearing 8 a flows out into the space between the frame 6 and the motor 4. The oil that has flowed into the space between the frame 6 and the motor 4 passes between the rotor 4a and the stator 4b, flows into the space between the frame 6 and the motor 4, and passes through the sub-frame 20. Return to the pool 3a.

  Furthermore, part of the oil flowing into the oil passage 7a reaches the upper end of the shaft portion 7, and lubricates the rocking bearing 8c. The oil that has lubricated the rocking bearing 8 c flows out into the space between the frame 6 and the rocking scroll 40. The oil that has flowed into the space between the frame 6 and the oscillating scroll 40 lubricates the Oldham ring 15. Then, the oil lubricating the Oldham ring 15 and the oil flowing into the space between the frame 6 and the oscillating scroll 40 flow into the oil drainage pipe 21. The oil that has flowed into the oil discharge pipe 21 flows out into the space between the frame 6 and the sub-frame 20, passes through the sub-frame 20 and returns to the oil sump 3a.

  Here, part of the oil that has flowed into the oil passage 7a and reached the upper end of the shaft 7 flows along the internal space 42a into the horizontal hole 51, and flows into the oil supply groove 54 through the vertical hole 52. Then, the oil flowing into the oil supply groove 54 spreads to the whole of the oil supply groove 54 by the rocking motion of the rocking scroll 40. Then, the oil that has spread to the oil supply groove 54 lubricates the thrust bearing 9 located immediately below the oil supply groove 54.

  Next, the operation of the compressor 1 according to the first embodiment of the present invention will be described. The oil passage 7a and the thrust lower surface 40a of the rocking scroll 40 are connected to the rocking scroll 40, and flow in the oil path 7a between the thrust lower surface 40a and the opposing surface of the frame 6 facing the thrust lower surface 40a. An oil supply hole 50 for supplying oil is formed. When the compression unit 5 compresses the working gas, the oscillating scroll 40 receives a thrust load downward from the compressed working gas. The thrust load is supported by a thrust lower surface 40 a on the opposite side to the wrap portion 41 in the oscillating scroll 40. The rocking scroll 40 slides with the frame 6 at the thrust lower surface 40 a when rocking movement is performed. Therefore, it is necessary to supply sufficient oil between the thrust lower surface 40a and the frame 6 to reduce the friction coefficient.

  Conventionally, the oil flowing into the space between the frame 6 and the oscillating scroll 40 is bounced up by the oscillating motion of the oscillating scroll 40 to be supplied to the thrust bearing 9 formed on the frame 6. Are known. In such a compressor 1, oil is mainly supplied to the inner peripheral portion of the thrust bearing 9 and is not supplied much to portions other than the inner peripheral portion of the thrust bearing 9. Also, in this case, the amount of oil supplied to the thrust bearing 9 fluctuates depending on the amount of oil stored in the space between the frame 6 and the oscillating scroll 40. Furthermore, the amount of oil supplied to the thrust bearing 9 also varies depending on the eccentricity radius when the swinging scroll 40 swings.

  On the other hand, in the first embodiment, in the rocking scroll 40, the oil passage 7a and the thrust lower surface 40a of the rocking scroll 40 are connected, and the thrust lower surface 40a and the thrust lower surface 40a face each other. Between the surface and the surface, an oil supply hole 50 for supplying the oil flowing to the oil passage 7a is formed. Thus, the oil that has reached the upper end of the oil passage 7a is supplied through the oil supply hole 50 between the thrust lower surface 40a and the opposite surface of the frame 6 facing the thrust lower surface 40a. That is, in the compressor 1, the oil supplied between the thrust lower surface 40 a and the facing surface of the frame 6 facing the thrust lower surface 40 a is directly supplied from the oil pump 3. Therefore, the compressor 1 can stably supply the oil between the oscillating scroll 40 and the frame 6. Moreover, the compressor 1 can thereby easily manage the amount of oil supplied between the oscillating scroll 40 and the frame 6.

  Further, on the thrust lower surface 40 a, an annular oil supply groove 54 coaxial with the swing scroll 40 and passing through the oil supply hole 50 is formed. Thus, the oil flowing from the oil supply groove 54 is uniformly supplied to the thrust bearing 9. Furthermore, by optimizing the volume of the oil supply hole 50, the amount of oil supply per one rotation when the oscillating scroll 40 makes one rotation can be kept constant. Thereby, the compressor 1 can supply oil more stably between the oscillating scroll 40 and the frame 6.

  In the rocking scroll 40, the angle between the wall surface 54a of the oil supply groove 54 and the thrust lower surface 40a is an obtuse angle. Therefore, the oil between the rocking scroll 40 and the frame 6 is not easily scraped off by the peripheral portion of the oil supply groove 54. Therefore, the compressor 1 can efficiently lubricate the oil between the oscillating scroll 40 and the frame 6.

  Furthermore, the inner diameter rin of the oil supply groove 54 is larger than the sum of the inner diameter Rin of the thrust bearing 9 and the eccentricity radius rr when the swing scroll 40 swings. Thus, the inner peripheral edge portion of the oil supply groove 54 does not protrude from the inner peripheral edge portion of the thrust bearing 9 even if the rocking scroll 40 swings. Further, the outer diameter rout of the oil supply groove 54 is smaller than a value obtained by subtracting the eccentricity radius rr when the oscillating scroll 40 oscillates from the outer diameter Rout of the thrust bearing 9. Thus, the outer peripheral edge portion of the oil supply groove 54 does not protrude from the outer peripheral edge portion of the thrust bearing 9. Thus, by optimizing the lower limit value of the inner diameter of the oil supply groove 54 and the upper limit value of the outer diameter of the oil supply groove 54, oil flowing in the oil supply groove 54 is prevented from falling without hitting the thrust bearing 9. can do.

The inner diameter rin of the oil supply groove 54 is smaller than the inner diameter Rin of the thrust bearing 9 plus a value twice the eccentricity radius rr when the oscillating scroll 40 oscillates. Thereby, the inner peripheral edge portion of the oil supply groove 54 reaches the inner peripheral edge portion of the thrust bearing 9 . Further, the outer diameter rout of the oil supply groove 54 is larger than the value obtained by subtracting twice the value of the eccentricity radius rr when the oscillating scroll 40 oscillates from the outer diameter Rout of the thrust bearing 9 . Thus, the outer peripheral edge portion of the oil supply groove 54 reaches the outer peripheral edge portion of the thrust bearing 9 .

  As described above, by optimizing the upper limit value of the inner diameter of the oil supply groove 54 and the lower limit value of the outer diameter of the oil supply groove 54, the oscillating scroll 40 in the thrust bearing 9 performs the oscillating movement. The oil flowing in the oil supply groove 54 is applied in a range twice as large as the eccentric radius of. The oil applied to the thrust bearing 9 is further spread by sliding on the thrust lower surface 40 a of the oscillating scroll 40. Thus, the compressor 1 can spread the oil flowing through the oil supply groove 54 over the entire surface of the thrust bearing 9.

  The oil supply hole 50 is formed of a horizontal hole 51 whose one end is connected to the oil passage 7a, and a vertical hole 52 which connects the horizontal hole 51 and the thrust lower surface 40a. The horizontal hole 51 extends radially from, for example, the upper end of the oil passage 7a, and the vertical hole 52 extends axially from the horizontal hole 51, for example. As described above, the direction in which the horizontal holes 51 are bored is one direction, and the direction in which the vertical holes 52 are bored is also one direction. Therefore, in the manufacture of the orbiting scroll 40, the formation of the oil supply hole 50 can be simplified. Further, the lateral hole 51 extends to and penetrates the side surface 40 b of the oscillating scroll 40, and the penetrating portion is closed by the plug 53. As described above, the lateral hole 51 extends to and penetrates the side surface 40 b of the rocking scroll 40, so that the lateral hole 51 can be easily drilled in forming the oil supply hole 50. Thereby, in the manufacture of the oscillating scroll 40, the formation of the oil supply hole 50 can be further simplified.

Second Embodiment
Next, a compressor 1 according to a second embodiment of the present invention will be described. FIG. 6 is an axial sectional view showing the oscillating scroll 40 according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in that the swing scroll 40 is formed with an extension hole 55 for supplying oil to the compression chamber 5a. In the second embodiment, the same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted. The differences from the first embodiment will be mainly described.

  As shown in FIG. 6, the swing scroll 40 is formed with an extension hole 55 for connecting the vertical hole 52 and the upper surface 40c of the base plate portion 43 and supplying oil to the compression chamber 5a. The oil flowing into the horizontal hole 51 from the upper end of the oil passage 7 a partially flows into the vertical hole 52 and partially flows into the extension hole 55. The oil flowing into the extension hole 55 is supplied to the compression chamber 5 a formed by the fixed scroll 30 and the oscillating scroll 40. Thereby, the sliding part in the compression chamber 5a is lubricated, and the reliability is improved. In addition, since the sliding portion is filled with oil, leakage of working gas is reduced, and the performance of the compressor 1 is improved.

  FIG. 7 is a top view showing the oscillating scroll 40 according to the second embodiment of the present invention. As shown in FIG. 7, the oscillating scroll 40 has a spiral wrap portion 41. The extension hole 55 is disposed at a position closer to the end portion 41 a than the central portion 41 b of the wrap portion 41. That is, the extension hole 55 is provided in the base plate portion 43 in the vicinity of the end portion 41 a of the wrap portion 41. Thus, the oil that has flowed into the extension hole 55 flows from the end 41 a of the wrap 41 toward the central portion 41 b of the wrap 41 and is efficiently supplied to the wrap 41. Furthermore, the end portion 41 a of the wrap portion 41 is separated from the central portion 41 b of the wrap portion 41 facing the portion of the fixed scroll 30 from which the working gas is discharged. Therefore, it is possible to suppress the working gas from leaking from the extension hole 55.

Third Embodiment
Next, a compressor 1 according to Embodiment 3 of the present invention will be described. FIG. 8 is an axial sectional view showing the oscillating scroll 40 according to the third embodiment of the present invention. The third embodiment is different from the first embodiment in that a through hole 56 for supplying oil to the compression chamber 5a is formed in the oscillating scroll 40. Note that configurations that are not particularly described in the third embodiment are the same as the first and second embodiments. And in this Embodiment 3, the part which is common in Embodiment 1 attaches | subjects the same code | symbol, abbreviate | omits description, and demonstrates centering on difference with Embodiment 1. FIG.

  As shown in FIG. 8, the swing scroll 40 is formed with a through hole 56 that connects the oil supply groove 54 and the upper surface 40 c of the base plate portion 43 and supplies oil to the compression chamber 5 a. Part of the oil flowing through the oil supply groove 54 flows into the through hole 56. The oil flowing into the through hole 56 is supplied to the compression chamber 5 a formed by the fixed scroll 30 and the oscillating scroll 40. Thereby, the sliding part in the compression chamber 5a is lubricated, and the reliability is improved. In addition, since the sliding portion is filled with oil, leakage of working gas is reduced, and the performance of the compressor 1 is improved.

  The through hole 56 is formed to connect the oil supply groove 54 and the upper surface 40 c of the base plate 43 at a position separated from the vertical hole 52. Therefore, the oil flowing into the vertical hole 52 does not flow into the through hole 56 immediately after flowing into the oil supply groove 54, but flows into the through hole 56 after passing through the oil supply groove 54 by a predetermined distance. Therefore, since the flow resistance is applied to the oil as much as the oil passes through the oil supply groove 54, it is possible to suppress the excessive oil from flowing into the through hole 56. Therefore, the supply of excess oil to the wrap portion 41 can be suppressed.

  Although the above embodiment illustrates the case where the compressor 1 is a low pressure shell type, it may be a high pressure shell type.

  1 compressor, 2 shell, 2a upper shell, 2b lower shell, 3 oil pump, 3a oil reservoir, 4 motor, 4a rotor, 4b stator, 5 compression section, 5a compression chamber, 6 frame, 6a suction port, 7 shaft section, 7a oil passage, 8a main bearing, 8b sub bearing, 8c rocking bearing, 9 thrust bearing, 11 suction pipe, 12 discharge pipe, 13 discharge chamber, 14 muffler, 15 oldham ring, 15a oldham groove, 16 slider, 17 sleeve, 18 first balancer, 18a balancer cover, 19 second balancer, 20 sub frame, 21 oil drain pipe, 30 fixed scroll, 31 fixed wrap portion, 40 rocking scroll, 40a thrust lower surface, 40b side surface, 40c upper surface, 41 Lap part, 41a end part, 41b central part, 42 b Parts, 42a inner space 43 units plate portion, 50 oil supply hole, 51 lateral hole 52 vertical hole, 53 the plug, 54 oil supply groove, 54a walls, 55 extending hole, 56 through hole.

Claims (5)

A shell forming an outer shell and having an oil reservoir formed at the lower portion,
An oil pump housed in the shell and sucking up oil from the oil reservoir;
A motor provided inside the shell;
A compression unit provided inside the shell and driven by the motor to compress the working gas;
A frame fixed to the shell and supporting the compression part;
An oil passage supported by the frame, through which oil sucked up by the oil pump flows, is formed inside, and the shaft portion connecting the motor and the compression portion to transmit the rotational force of the motor to the compression portion And
The compression unit is
A fixed scroll fixed inside the shell;
An oscillating scroll connected to the upper end of the shaft and forming a compression chamber for compressing the working gas together with the fixed scroll;
In the oscillating scroll,
The oil passage is connected to the thrust lower surface of the rocking scroll, and an oil supply hole is formed between the thrust lower surface and the opposite surface of the frame facing the thrust lower surface to supply oil flowing in the oil passage. Has been
The thrust lower surface is
An annular oil supply groove passing through the oil supply hole is formed;
The oscillating scroll is
A spiral wrap forming the compression chamber;
And a plate-like base plate portion on which the wrap portion is placed;
In the oscillating scroll,
A compressor having a through hole for connecting the oil supply groove and the upper surface of the base plate portion and supplying oil to the compression chamber. The filling hole is
A lateral hole whose one end is connected to the oil passage;
It is comprised from the vertical hole which connects the said horizontal hole and the said thrust lower surface,
The through hole is
The compressor according to claim 1 , wherein the compressor is configured to connect the oil supply groove and the upper surface of the base plate portion at a position separated from the vertical hole. A shell forming an outer shell and having an oil reservoir formed at the lower portion,
An oil pump housed in the shell and sucking up oil from the oil reservoir;
A motor provided inside the shell;
A compression unit provided inside the shell and driven by the motor to compress the working gas;
A frame fixed to the shell and supporting the compression part;
An oil passage supported by the frame, through which oil sucked up by the oil pump flows, is formed inside, and the shaft portion connecting the motor and the compression portion to transmit the rotational force of the motor to the compression portion And
The compression unit is
A fixed scroll fixed inside the shell;
An oscillating scroll connected to the upper end of the shaft and forming a compression chamber for compressing the working gas together with the fixed scroll;
In the oscillating scroll,
The oil passage is connected to the thrust lower surface of the rocking scroll, and an oil supply hole is formed between the thrust lower surface and the opposite surface of the frame facing the thrust lower surface to supply oil flowing in the oil passage. Has been
The filling hole is
A lateral hole whose one end is connected to the oil passage;
It is comprised from the vertical hole which connects the said horizontal hole and the said thrust lower surface ,
The oscillating scroll is
A spiral wrap forming the compression chamber;
And a plate-like base plate portion on which the wrap portion is placed;
In the oscillating scroll,
The compressor which has the extension hole which connects the said vertical hole and the upper surface of the said base plate part, and which supplies oil to the said compression chamber is formed. The extension hole is
The compressor according to claim 3 , wherein the compressor is disposed at a position closer to the end than the center of the wrap. The lateral hole extends to and penetrates the side surface of the oscillating scroll;
The compressor according to claim 3 or 4, wherein the penetrating portion is closed by a plug.

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