JP2010525240A - Compressor and oil supply structure thereof - Google Patents

Abstract

  The present invention relates to a compressor and an oil supply structure thereof. Since a predetermined amount of oil is supplied to the compression pocket formed between the orbiting scroll wrap and the fixed scroll lap during high-speed operation or low-speed operation of the compressor, pressure leakage between the wraps is prevented. , The performance of the compressor is improved. Furthermore, since friction between the orbiting scroll and the fixed scroll is prevented, wear of the components can be minimized.

Description

  The present invention relates to a compressor and an oil supply structure thereof.

  Although compressors are well known, they have various disadvantages.

Embodiments of the present invention will be described in detail with reference to the following drawings. Like reference numerals in the drawings denote like components.
It is sectional drawing which shows the compressor which has the oil supply structure by one Embodiment. It is sectional drawing which shows the modification of the oil hole of the oil supply structure by one Embodiment. It is sectional drawing which shows the modification of the oil hole of the oil supply structure by one Embodiment. It is a top view which shows the modification of the oil hole of the oil supply structure by one Embodiment. It is a top view which shows the modification of the oil hole of the oil supply structure by one Embodiment. It is a top view which shows the modification of the oil hole of the oil supply structure by one Embodiment. It is a top view which shows the oil groove of the oil supply structure by one Embodiment. It is sectional drawing which shows the operation state of the compressor which has the oil supply structure by one Embodiment. It is sectional drawing which shows the compressor which has the oil supply structure by other embodiment. It is sectional drawing which shows the compressor which has the oil supply structure by other embodiment. It is a top view which shows the flame | frame of the oil supply structure of FIG. It is sectional drawing which shows the modification of the oil channel | path of the oil supply structure of FIG. It is sectional drawing which shows the oil discharge passage of the oil supply structure of FIG. It is sectional drawing which shows the oil adjustment part of the oil supply structure of FIG. It is sectional drawing which shows the operation state of the oil adjustment part of FIG. It is sectional drawing which shows the operation state of the oil adjustment part of FIG. It is sectional drawing which shows the other example of the oil adjustment part of the oil supply structure of FIG. It is sectional drawing which shows the operation state of the oil adjustment part of FIG. It is sectional drawing which shows the operation state of the oil adjustment part of FIG. It is a figure which shows the example of installation of the compressor which has the oil supply structure by embodiment disclosed by this specification. It is a figure which shows the example of installation of the compressor which has the oil supply structure by embodiment disclosed by this specification. It is a figure which shows the example of installation of the compressor which has the oil supply structure by embodiment disclosed by this specification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  Generally, a compressor is a device that compresses gas by converting electrical energy into kinetic energy. The compressor includes a driving force generation unit that generates a driving force and a compression unit that compresses the gas by receiving the driving force generated from the driving force generation unit. The compressor is classified into various types such as a rotary compressor, a reciprocating compressor, and a scroll compressor according to a compression mechanism for compressing gas.

  In the scroll compressor, the rotational force generated from the motor is transmitted to the orbiting scroll via the rotating shaft, and the orbiting scroll meshes with the fixed scroll and performs the orbiting motion, whereby the fixed scroll and the orbiting scroll are wrapped. As a result, a plurality of compression chambers or compression pockets are formed. As the compression chamber moves to the center and its volume changes, gas is sucked in, compressed, and discharged. Oil contained in the casing is pumped along an oil passage provided in the rotary shaft, and supplied between the back surface of the orbiting scroll and the bearing surface of the main frame that supports the back surface of the orbiting scroll. Thereafter, the oil returns to the bottom surface of the casing.

  During operation of the scroll compressor, sufficient oil must be supplied to the inside of the compression pocket. Otherwise, friction occurs between the orbiting scroll and the fixed scroll, and wear occurs between them. In addition, the oil seal performance between the fixed scroll and the orbiting scroll is reduced, so that a pressure leak occurs between the high pressure side and the low pressure side. This reduces the reliability and performance of the compressor.

  Hereinafter, a scroll compressor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The oil supply device according to the embodiment of the present invention is described in detail as being realized in a scroll compressor, but can be realized in other types of compressors. In addition, the oil separator according to the embodiment of the present invention can be realized by an upper type or a lower type scroll compressor.

  FIG. 1 is a cross-sectional view illustrating a compressor having an oil supply structure according to an embodiment. As shown in FIG. 1, the compressor 1 is disposed between a casing 10, a main frame 20 and a sub frame 30 disposed at a predetermined interval in the casing 10, and between the main frame 20 and the sub frame 30. Drive motor M. A suction pipe 11 and a discharge pipe 12 are respectively coupled to the casing 10, and oil is accommodated in the casing 10.

  The main frame 20 is formed in the frame main body 21 in a predetermined shape and accommodates the rotation shaft 70. The main frame 20 extends from the shaft insertion hole 22 on the upper surface of the frame main body 21 and is larger than the inner diameter of the shaft insertion hole 22. It includes a boss insertion hole 23 having an inner diameter, a bearing surface 24 formed on the upper surface of the frame body 21, and an oil groove 25 formed in an annular shape so as to have a predetermined width and depth on the bearing surface 24.

  The fixed scroll 40 is coupled to the inside of the casing 10 with a predetermined distance from the main frame 20. The orbiting scroll 50 is coupled between the fixed scroll 40 and the main frame 20 so as to be capable of orbiting. An Oldham ring 60 that prevents the orbiting scroll 50 from rotating is coupled between the main frame 20 and the orbiting scroll 50.

  The fixed scroll 40 includes a body portion 41 having a predetermined shape, a wrap 42 formed on an involute curve having a predetermined height and thickness on one surface of the body portion 41, and a discharge formed at the center of the body portion 41. A hole 43 and a suction port 44 formed on one side of the body portion 41 are included.

  The orbiting scroll 50 includes a disc portion 51 having a predetermined thickness and area, a wrap 52 formed on an involute curve having a predetermined thickness and height on one surface of the disc portion 51, and the disc portion 51. And a boss portion 53 formed on the other surface so as to have a predetermined height. The lower surface of the disc portion 51 forms a bearing surface 54, and a shaft insertion hole 55 having a predetermined outer diameter and depth is formed in the boss portion 53.

  At least one oil hole 56 is formed in the disc portion 51 of the orbiting scroll 50. The oil hole 56 is located on the suction side of the compression unit including a compression pocket or a compression chamber formed by the wrap 42 of the fixed scroll 40 and the wrap 52 of the orbiting scroll 50. For example, the oil hole 56 is disposed adjacent to one end of the wrap 52 on an extension line of the wrap 52 formed to protrude from the disk portion 51 of the orbiting scroll 50. The oil hole 56 may be formed so as to be in contact with one end of the wrap 52, or may be formed adjacent to one end of the wrap 52 in order to facilitate processing. The inner diameter of the oil hole 56 is smaller than the thickness of the wrap 52 of the orbiting scroll 50. The oil hole 56 is formed perpendicular to the disc portion 51 and has a constant inner diameter. Alternatively, the oil hole 56 may be formed to be inclined with respect to the disc portion 51 as shown in FIG. The oil hole 54 has an inner diameter of 2.0 to 3.5 mm, for example.

  As shown in FIGS. 3 and 4, the oil hole 56 includes a circular hole portion 56A formed on the upper surface of the disc portion 51 so as to have a predetermined inner diameter and length, and a long groove portion communicating with the circular hole portion 56A. 56B may be formed. The long groove portion 56B is formed on the bottom surface of the disc portion 51 so as to have a cross-sectional area wider than that of the circular hole portion 56A. The long groove portion 56 </ b> B is formed such that its longitudinal direction extends toward the center of the disc portion 51.

  As shown in FIG. 5, the long groove portion 56 </ b> B may be formed adjacent to one end of the wrap 52 on the extension line of the wrap 52 of the orbiting scroll 50 formed on the upper surface of the disc portion 51. As shown in FIG. 6, the long groove portion 56 </ b> B may be formed to be inclined with respect to one end of the wrap 52. The oil groove 26 communicating with the oil hole 56 is formed on the bearing surface 24 of the main frame 20 that supports the lower surface of the disk portion 51 of the orbiting scroll 50. As shown in FIG. 7, the oil groove 26 is located on one side of the orbiting path of the oil hole 56 that moves by the orbiting motion of the orbiting scroll 50. The oil groove 26 is formed in a square shape, but may be formed in various shapes such as an annular shape in addition to the square shape. The oil groove 26 has a depth of 3.5 to 4.5 mm.

  The wrap 52 of the orbiting scroll 50 meshes with the wrap 42 of the fixed scroll 40, and the boss portion 53 is inserted into the boss insertion hole 23 of the main frame 20. The bearing surface of the disc portion 51 is supported by the bearing surface 24 of the main frame 20.

  The annular oil groove 25 formed in the main frame 20 may serve as the oil groove 26. In this case, it is not necessary to further form the oil groove 26 on the main frame 20. During the orbiting motion of the orbiting scroll 50, the oil hole 56 of the orbiting scroll contacts the oil groove 25. A rotary shaft 70 that transmits the rotational force generated from the drive motor M to the orbiting scroll 50 is coupled to the drive motor M. The rotating shaft 70 includes a shaft portion 71 having a predetermined length, an eccentric portion 72 extending from the shaft portion 71, and an oil passage 73 formed through the shaft portion 70 and the eccentric portion 72. A shaft portion 71 of the rotating shaft 70 is press-fitted into the rotor of the drive motor M and is inserted into the main frame 20. The eccentric portion 72 is inserted into the shaft insertion hole 55 of the boss portion 53 of the orbiting scroll 50. One end of the rotating shaft 70 is immersed in oil accommodated in the casing 10. Reference numeral B is a bush, 100 is an oil feeder attached to the rotary shaft 70, and 110 is a balance weight.

  Hereinafter, the operation of the oil supply structure of the compressor according to the embodiment will be described.

  When power is supplied to the compressor, the drive motor M operates to generate a rotational force. When the rotary shaft 70 rotates in response to the rotational force generated from the drive motor M, the orbiting scroll 50 coupled to the eccentric portion 72 performs the orbiting movement about the rotary shaft 70 by the Oldham ring 60. When the orbiting scroll 50 orbits, the wrap 52 of the orbiting scroll 50 meshes with the wrap 42 of the fixed scroll 40 to form a plurality of compression pockets or compression chambers P, and the plurality of compression pockets or compression chambers P orbit the scroll 50. Move towards the center of the. As the volume of the compression pocket or the compression chamber P changes, the gas is sucked and compressed and discharged from the discharge hole 43 of the fixed scroll 40. The gas sucked into the casing 10 through the suction pipe 11 is sucked into the compression pocket or the compression chamber P through the suction passage formed by the suction port 44 of the fixed scroll 40 and the orbiting scroll 50.

  As shown in FIG. 8, the oil stored in the casing 10 is pumped into an oil passage 73 formed in the rotating shaft 70 and filled in the boss insertion hole 23. The boss portion 53 of the orbiting scroll 50 moves circularly in the boss insertion hole 23 so that the oil filled in the boss insertion hole 23 is between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20. To provide lubrication. Part of the oil supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 is orbited from an oil hole 56 formed through the disc portion 51 of the orbiting scroll 50. It flows into a compression portion formed by the wrap 52 of the scroll 50 and the wrap 42 of the fixed scroll 40, that is, the compression pocket or the compression chamber P. As a result, the oil seal not only prevents pressure leakage between the high pressure compression pocket or compression chamber P and the low pressure compression pocket or compression chamber P, but also causes friction at the contact surface between the orbiting scroll 50 and the fixed scroll 40. Is prevented. The oil is smoothly supplied to the compressor not only during constant speed operation of the compressor but also during high speed operation or low speed operation. Further, when the oil hole 56 of the orbiting scroll 50 is formed on the suction side, the gas sucked into the compression pocket P formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll 40 flows. The oil supply performance from the hole 56 to the compression pocket P is improved.

  When the oil groove 26 communicating with the oil hole 56 of the orbiting scroll 50 is formed on the bearing surface 24 of the main frame 20, the amount of oil supplied from the oil hole 56 to the compression pocket P during the orbiting motion of the orbiting scroll 50 increases. To do. More specifically, part of the oil that flows between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 during the orbiting motion of the orbiting scroll 50 is stored in the oil groove 26. As the orbiting scroll 50 orbits, the oil hole 56 moves circularly about an arbitrary point. During the circular movement of the oil hole 56, the oil hole 56 communicates with the oil groove 26 formed on the bearing surface 24 of the main frame 20, so that the oil stored in the oil groove 26 flows into the oil hole 56, and again It flows into the compression pocket P. The oil groove 26 improves the oil supply performance to the compression pocket P. The oil supply performance to the compression pocket P is further improved during low speed operation of the compressor.

  According to this embodiment, when the compressor operates in the constant speed mode or the shift mode, the oil supply to the compression unit is made smooth. That is, the oil is smoothly supplied to the compressor during high speed operation or low speed operation of the compressor.

  FIG. 9 is a cross-sectional view illustrating a compressor having an oil supply structure according to another embodiment. As shown in the figure, the compressor of FIG. 9 includes a casing 10, a main frame 20, a fixed scroll 40, a turning scroll 50, a rotary shaft 70, and a drive motor M. An oil passage 27 is provided for supplying oil to the bearing surface 24 or the bearing surface 54 of the orbiting scroll 50. The compressor of this embodiment has the same structure as the above-described compressor except for the main frame 20. The main frame 20 is formed in a frame main body 21 having a predetermined shape and extends from the shaft insertion hole 22 on the upper surface of the frame main body 21. The shaft insertion hole 22 extends from the inner diameter of the shaft insertion hole 22. A boss insertion hole 23 having a large inner diameter and a predetermined depth, a bearing surface 24 formed on the upper surface of the frame body 21, and an oil groove formed in an annular shape so as to have a predetermined width and depth on the bearing surface 24 25. The oil passage 27 is formed so that the oil stored in the boss insertion hole 23 flows between the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 that supports the disc portion 51. It is formed through the bearing surface 24 of the main frame 20. The oil passage 27 may be formed to be inclined with respect to the bearing surface 24 of the main frame 20 or may be a straight hole.

  Hereinafter, the operation of the oil supply structure according to the present embodiment will be described.

  During operation of the compressor, the rotating shaft 70 rotates, so that oil in the casing 10 is pumped into an oil passage 73 formed in the rotating shaft 70. This oil is filled in the boss insertion hole 23, and the boss portion 53 moves circularly in the boss insertion hole 23, thereby supplying the oil between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20. Is done.

  A part of the oil filled in the boss insertion hole 23 is supplied between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 through the oil passage 27, whereby the orbiting scroll 50. The amount of oil supplied between the bearing surface 54 of the disc portion 51 and the bearing surface 24 of the main frame 20 increases. Part of the oil supplied between the bearing surface 54 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 is sucked into the compression pocket P together with the gas.

  In other words, the amount of oil supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 increases, so that the bearing surface 54 and the main surface of the disc portion 51 of the orbiting scroll 50 are increased. The amount of oil discharged from between the bearing surfaces 24 of the frame 20 increases. As a result, the amount of oil sucked into the compression part (compression pocket or compression chamber) together with the gas also increases.

  According to this embodiment, when the compressor operates in the constant speed mode or the shift mode, the oil supply to the compression unit is made smooth. That is, the oil is smoothly supplied to the compressor during high speed operation or low speed operation of the compressor.

  FIG. 10 is a cross-sectional view illustrating a compressor having an oil supply structure according to still another embodiment. As shown, the compressor of FIG. 10 includes a casing 10, a main frame 20, a fixed scroll 40, a turning scroll 50, a rotating shaft 70, and a drive motor M. The disk portion 51 of the orbiting scroll 50 is formed with an oil hole 56 through which oil flows into the compression portion during the orbiting motion of the orbiting scroll 50, and the oil hole 56 has an oil hole 56 on one side of the main frame 20. An oil passage 27 for supplying water is formed through. The compressor of this embodiment has the same structure as the above-described compressor except for the main frame 20 and the orbiting scroll 50.

  That is, the orbiting scroll 50 includes a disc portion 51 having a predetermined thickness and area, a wrap 52 formed on an involute curve having a predetermined thickness and height on one surface of the disc portion 51, and a disc portion. Boss portion 53 formed to have a predetermined height on the other surface of 51. A shaft insertion hole 55 having a predetermined outer diameter and depth is formed in the boss portion 53.

  An oil hole 56 is formed in the disc portion 51 of the orbiting scroll 50. The oil hole 56 is located on the suction side of the compression portion formed by the wrap 42 of the fixed scroll 40 and the wrap 52 of the orbiting scroll 50. That is, the oil hole 56 is disposed adjacent to one end of the wrap 52 on an extension line of the wrap 52 formed to protrude from the disc portion 51 of the orbiting scroll 50. The oil hole 56 may be formed so as to be in contact with one end of the wrap 52, or may be formed adjacent to one end of the wrap 52 in order to facilitate processing. The structure of the oil hole 56 of the orbiting scroll 50 of this embodiment is the same as that of the embodiment of FIG.

  The main frame 20 is formed in a predetermined shape in the frame main body 21 and extends from the shaft insertion hole 22 on the upper surface of the frame main body 21 and accommodates the rotary shaft 70, and is larger than the inner diameter of the shaft insertion hole 22. A boss insertion hole 23 having an inner diameter and a predetermined depth, a bearing surface 24 formed on the upper surface of the frame body 21, and an oil groove 25 formed in an annular shape so as to have a predetermined width and depth in the bearing surface 24. Including. The annular oil groove may be eliminated depending on the structure of the compressor.

  The oil passage 27 of the main frame 20 has a boss so that the oil stored in the boss insertion hole 23 flows between the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 that supports the disc portion 51. The insertion hole 23 and the bearing surface 24 of the main frame 20 are formed through. An oil groove 26 having a predetermined area and communicating with the oil hole 56 is formed on the bearing surface 24 of the main frame 20. The oil groove 26 is located on one side of the turning trajectory of the oil hole that is moved by the turning motion of the turning scroll 50. The oil passage 27 communicates with the oil groove 26. The oil groove 26 has the same shape as the oil groove in the embodiment of FIG.

  As shown in FIG. 11, the oil passage 27 of the main frame 20 is a linear through hole that penetrates the bearing surface on which the boss insertion hole 23 and the disc portion 51 of the orbiting scroll 50 are supported. The longitudinal direction is formed to be inclined with respect to the center of the boss insertion hole 23 of the main frame 20. The oil passage 27 is formed to be inclined so that the oil stored in the boss insertion hole 23 is effectively discharged when the boss portion 53 of the orbiting scroll 50 performs a circular motion.

  As shown in FIG. 12, the oil passage 27 of the main frame 20 in another embodiment includes a first through hole 27 </ b> A that linearly penetrates the inner peripheral wall of the boss insertion hole 23 of the main frame 20 and the outer surface of the main frame 20. Alternatively, the first through hole 27A and the second through hole 27B that linearly penetrates the bearing surface 24 of the main frame 20 may be formed. A plug 27C that closes the first through hole 27A is provided on the outer surface of the main frame 20 in the first through hole 27A. In this way, the oil passage 27 can be easily processed.

  As shown in FIG. 13, an oil discharge passage 28 for discharging oil inside the boss insertion hole 23 is formed on one side of the main frame 20. The inlet of the oil discharge passage 28 located on the inner peripheral wall of the boss insertion hole 23 is located above the inlet of the oil passage 27 formed on the inner peripheral wall of the boss insertion hole 23. The oil discharge passage 28 is formed in a vertical direction so as to communicate with the first passage 28A through the inner peripheral wall of the boss insertion hole 23 and the outer peripheral surface of the main frame 20, and the outer peripheral surface of the main frame 20 with the first passage 28A. Second passage 28B. The oil discharge passage 28 serves to discharge the oil excessively stored in the boss insertion hole 23 to the bottom surface of the casing 10.

  An oil adjuster that adjusts the amount of oil that flows into the compression section through the oil passage 27 is provided inside the oil passage 27 of the main frame 20. As shown in FIG. 14, the oil adjusting unit according to an example includes a small tube portion 27D and a tube expansion portion 27E having an inner diameter larger than the small tube portion 27D, and is formed by a difference between the inner diameter of the small tube portion 27D and the inner diameter of the tube expansion portion 27E. An auxiliary passage 27F through which oil passes is formed at the inner edge of the stepped surface. A stopper 120 having a through hole 121 formed therein is coupled to the expanded pipe portion 27E of the oil passage 27, and an open / close ball 130 for opening and closing the through hole 121 of the stopper 120 is inserted into the expanded pipe section 27E. The open / close ball 130 moves according to the flow velocity flowing inside the pipe expansion portion 27E. A spring 140 that elastically supports the open / close ball 130 is inserted into the expanded pipe portion 27E.

  The stopper 120 has a predetermined length and is formed to have a circular cross-sectional shape corresponding to the cross-section of the tube expansion portion 27E. A through hole 121 is formed inside the stopper 120, and a support surface on which the spring 140 is supported is provided on the inner peripheral wall of the through hole 121.

  The open / close ball 130 is formed in a spherical shape. The maximum diameter of the open / close ball 130 is smaller than the inner diameter of the expanded tube portion 27E and larger than the inner diameter of the through hole 121 of the stopper 120. The spring 140 is a coil spring. In this case, one side of the coil spring is supported by the support surface of the stopper 120 and the other side is supported by the open / close ball 130.

  When the compressor is operating at low speed, as shown in FIG. 15, the oil adjusting unit is configured such that the oil contained in the boss insertion hole 23 of the main frame 20 has a small pipe portion 27 </ b> D, an auxiliary passage 27 </ b> F, a through hole 121 of the stopper 120, and It operates so as to be supplied to the oil hole 56 of the orbiting scroll 50 through the expanded pipe portion 27E. The rotational speed of the boss portion 53 of the orbiting scroll 50 that moves circularly in the boss insertion hole 23 of the main frame 20 is reduced, and the amount of oil pumped into the oil passage 27 is reduced. 130 is supported by the step surface and opens the through hole 121 of the stopper 120.

  When the compressor operates at high speed, the amount of oil pumped from the boss insertion hole 23 to the oil passage 27 increases as shown in FIG. The through hole 121 is closed. This prevents oil stored in the boss insertion hole 23 of the main frame 20 from flowing into the oil hole 56 of the orbiting scroll 50 via the oil passage 27. The oil stored in the boss insertion hole 23 is supplied to the oil hole 56 of the orbiting scroll 50 through the space between the bearing surface 54 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20.

  The oil adjuster smoothly supplies oil to the compressor when the compressor rotates at a low speed, and prevents oil from being excessively supplied to the compressor when the compressor rotates at a high speed. In particular, the oil adjusting unit is configured so that oil stored in the boss insertion hole 23 of the main frame 20 is supplied to the oil hole 56 of the orbiting scroll through the oil passage 27 when the compressor rotates at a low speed. During the high speed rotation, the oil stored in the boss insertion hole 23 of the main frame 20 is prevented from being supplied to the oil hole 56 of the orbiting scroll through the oil passage 27.

  FIG. 17 is a cross-sectional view of an oil adjusting unit according to another example. The oil adjusting portion of the present example is formed in a through hole 151 and is located at the expanded portion 27K and the stopper 150 fixedly coupled to the expanded portion 27K of the vertical passage 27G of the oil passage 27, and moves according to the oil flow rate. And an opening / closing ball 160 that opens and closes the through hole 151 of the stopper 150 and a spring 170 that is coupled to the stopper 150 and elastically supports the opening / closing ball 160.

  The oil passage 27 includes an inclined passage 27H that penetrates the inner peripheral wall of the boss insertion hole 23 of the main frame 20 and the bearing surface 24 of the main frame 20, and the bearing surface 24 of the main frame 20 and the lower surface of the frame body 21 of the main frame 20. It consists of a vertical passage 27G that penetrates. The vertical passage 27G and the inclined passage 27H are connected to the bearing surface 24 of the main frame 20, and a common hole 27M having a predetermined area and depth is formed in the connection portion. The common hole 27M may serve as the oil groove.

  The expanded tube portion 27K is formed in the vertical passage 27G, and a stepped surface is formed at the start portion of the expanded tube portion 27K.

  The stopper 150 is coupled to the expanded portion 27K with a predetermined distance from the step surface, and a spherical opening / closing ball 160 is located between the stopper 150 and the step surface.

  The spring 170 is a coil spring. In this case, one side of the coil spring is supported by the step surface, and the other side is supported by the open / close ball 160. The open / close ball 160 receives the elastic force of the coil spring and closes the through hole 151 of the stopper 150.

  When the compressor operates at a low speed, as shown in FIG. 18, the oil adjuster supplies the oil accommodated in the boss insertion hole 23 of the main frame 20 to the oil hole 56 of the orbiting scroll through the inclined passage 27H. To work. In this case, since the amount of oil pumped from the boss insertion hole 23 to the inclined passage 27H is small, the hydraulic pressure in the common hole 27M is low. Therefore, the open / close ball 160 closes the vertical passage 27G by the elastic force of the spring 170.

  At the time of high speed operation of the compressor, as shown in FIG. 19, since the amount of oil pumped from the boss insertion hole 23 to the inclined passage 27H increases, the hydraulic pressure of the common hole 27M increases and the spring 170 contracts. The open / close ball 160 opens the vertical passage 27G, and the oil pumped into the inclined passage 27H is discharged to the lower side of the main frame 20 through the vertical passage 27G. As a result, the amount of oil flowing into the oil hole 56 of the orbiting scroll 50 is adjusted, and the oil is prevented from excessively flowing into the compression section during high speed operation.

  The oil adjusting unit can also be applied to the oil supply structure of FIG. The oil is prevented from being excessively supplied to the compressor during high-speed operation of the compressor.

  Hereinafter, the operation of the oil supply structure of the compressor according to another embodiment will be described.

  In the operation process of the compressor, the oil in the casing 10 is pumped into the oil passage 73 formed in the rotary shaft 70 by the rotation of the rotary shaft 70, filled in the boss insertion hole 23, and then the orbiting scroll 50. The boss portion 53 of the rotating scroll 50 is circularly moved in the boss insertion hole 23, and is supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 through the oil passage 27 of the main frame 20. Is done. The oil accommodated in the boss insertion hole 23 flows between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 by the rotation of the boss portion 53 of the orbiting scroll 50. The oil supplied between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 is wrapped by the orbiting motion of the orbiting scroll 50 from the oil hole 56 of the orbiting scroll 50. 52 and the wrap 42 of the fixed scroll 40, that is, flows into a compression pocket P.

  On the other hand, when the oil groove 26 communicating with the oil hole 56 of the orbiting scroll 50 is formed on the bearing surface 24 of the main frame 20, the amount of oil supplied from the oil hole 56 to the compression unit during the orbiting motion of the orbiting scroll 50 is reduced. To increase. More specifically, part of the oil that flows between the bearing surface 54 of the disk portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 during the operation of the orbiting scroll 50 is stored in the oil groove 26. Then, as the orbiting scroll 50 orbits, the oil hole 56 formed in the disc portion 51 of the orbiting scroll 50 moves circularly about an arbitrary point. During the circular movement of the oil hole 56 of the orbiting scroll 50, the oil hole 56 communicates with the oil groove 26 formed on the bearing surface 24 of the main frame 20, so that the oil filled in the oil groove 26 flows into the oil hole 56. Then, it flows into the compression pocket P again. The oil groove 26 promotes oil supply performance to the compression pocket P. The oil supply performance to the compression pocket P is further improved during low-speed operation of the compressor.

  According to this embodiment, when the compressor operates in the constant speed mode or the shift mode, the oil supply to the compression unit is made smooth. That is, the oil is smoothly supplied to the compressor during high speed operation or low speed operation of the compressor.

  When the oil adjustment part is provided in the oil passage 27 of the main frame 20, when the compressor is operated at high speed, excessive oil is put in the compression pocket P formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll 40. It is prevented from being supplied.

  The oil supply structure of the compressor is formed through the oil storage part provided outside the compression pocket P and the disk part 51 of the orbiting scroll 50, and is stored in the oil storage part by the orbiting movement of the orbiting scroll 50. An oil passage that supplies oil to the inside of the compression pocket P may be further included.

  As described above, when the compressor according to the embodiment of the present invention is operated at high speed, a certain amount of oil can only be supplied to the compression pocket P formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll 40. Instead, oil can be smoothly supplied to the compression pocket P even during low-speed operation.

  The oil supply structure of the compressor prevents pressure leakage between the orbiting scroll wrap and the fixed scroll wrap by supplying a certain amount of oil to the compression pocket P during constant speed operation or variable speed operation of the compressor. Thus, the compression performance is improved, and the friction between the orbiting scroll and the fixed scroll is suppressed to minimize these wears, thereby improving the reliability of the compressor.

  The compressor and its oil supply structure according to the embodiments disclosed herein have various applications. Examples of such applications include air conditioning and refrigeration applications. An application example in which a compressor 710 having an oil supply structure according to an embodiment disclosed in the present specification is installed in a refrigerator / freezer 700 is shown in FIG. The installation and performance of the compressor in the refrigerator are described in U.S. Pat. Nos. 7,082,776, 6,955,064, 7,114,345, 7,055,338, and 6,772. 601 in detail.

  FIG. 21 shows another application example in which a compressor 810 having an oil supply structure according to an embodiment disclosed in the present specification is installed in an outdoor unit of an air conditioner 800. The installation and performance of the compressor in the air conditioner is described in U.S. Pat. Nos. 7,121,106, 6,868,681, 5,775,120, 6,374,492, 6,962, Nos. 058, 6,951,628, and 5,947,373.

  FIG. 22 shows still another application example in which a compressor 910 having an oil supply structure according to an embodiment disclosed in the present specification is installed in a single integrated air conditioner 900. The installation and performance of the compressor in the air conditioner are described in U.S. Patent Nos. 7,032,404, 6,412,298, 7,036,331, 6,588,228, and 6,182. 460, and 5,775,123.

  In an embodiment disclosed in the present specification, an oil supply structure for a compressor that smoothly supplies oil into a compression portion (compression pocket) formed by a fixed scroll wrap and a turning scroll wrap. I will provide a.

  According to one embodiment disclosed in the present specification, a fixed scroll, a turning scroll that meshes with the fixed scroll to form a compression portion, a bearing surface that supports the turning scroll, and a boss portion of the turning scroll are inserted. And an oil supply structure for a compressor including a frame having a boss insertion hole. An oil hole is formed through the disk portion of the orbiting scroll to allow oil to flow into the compression portion.

  According to another embodiment disclosed in the present specification, a fixed scroll, a turning scroll that meshes with the fixed scroll to form a compression portion, a bearing surface that supports the turning scroll, and a boss portion of the turning scroll. An oil supply structure for a compressor including a frame having a boss insertion hole to be inserted is provided. An oil passage through which oil stored in the boss insertion hole flows between the disk portion of the orbiting scroll and the bearing surface of the frame is formed through the boss insertion hole and the bearing surface of the frame.

  According to still another embodiment disclosed in the present specification, a fixed scroll, a turning scroll that meshes with the fixed scroll to form a compression portion, a bearing surface that supports the turning scroll, and a boss portion of the turning scroll. And a frame having a boss insertion hole into which the oil is inserted. An oil hole for allowing oil to flow into the compression portion is formed through the disk portion of the orbiting scroll, and an oil passage for supplying oil to the oil hole is formed through one side of the frame. Is done.

  Reference herein to an embodiment, example, or the like means that the particular feature, structure, or characteristic described in connection with the embodiment above is included in at least one embodiment of the invention. Such phrases appearing at various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, that characteristic, structure, or feature is achieved in relation to other embodiments within the scope of those skilled in the art. can do.

  Although the invention has been described with reference to exemplary embodiments thereof, it should be understood by those skilled in the art that various modifications and other embodiments can be derived within the spirit and scope of the principles of the invention. is there. In particular, various changes and modifications can be made in the components and / or the subject combination arrangement within the specification, drawings, and appended claims. In addition to variations and modifications of the components and / or arrangements, alternative uses will be apparent to those skilled in the art.

Claims (35)

With fixed scrolling,
An orbiting scroll disposed adjacent to the fixed scroll and forming a compression chamber with the fixed scroll; and
An oil supply structure for a scroll compressor, comprising: at least one oil hole formed in the orbiting scroll so as to supply oil to the compression chamber.   2. The scroll compressor oil supply structure according to claim 1, wherein the at least one oil hole is extended in parallel with a rotation center axis of a rotation axis of the orbiting scroll.   2. The oil supply structure for a scroll compressor according to claim 1, wherein the at least one oil hole is inclined and extended with respect to a rotation center axis of a rotary shaft of the orbiting scroll.   2. The scroll compressor oil supply structure according to claim 1, wherein an inner diameter of the oil hole is smaller than a diameter of a wrap of the orbiting scroll.   2. The oil supply structure for a scroll compressor according to claim 1, wherein an inner diameter of the at least one oil hole is 2.0 to 3.5 mm.   2. The oil supply structure for a scroll compressor according to claim 1, wherein the at least one oil hole includes a hole extending through a disk portion of the orbiting scroll.   The oil supply structure for a scroll compressor according to claim 6, wherein the at least one oil hole further includes an extension groove formed on one surface of the disc portion and extended from the hole by a predetermined distance. .   The oil supply structure for a scroll compressor according to claim 7, wherein the extension groove extends substantially in a circumferential direction.   8. The oil supply structure for a scroll compressor according to claim 7, wherein the extension groove is extended toward a rotation center axis of a rotary shaft of the orbiting scroll.   The scroll compressor according to claim 7, wherein the extension groove is inclined and extended with respect to a line connecting the at least one oil hole and a rotation center axis of the rotary shaft of the orbiting scroll. Oil supply structure. A main frame having a bearing surface on which the orbiting scroll is supported;
An oil groove is formed on the bearing surface of the main frame,
The oil supply structure for a scroll compressor according to claim 7, wherein the extension groove is positioned adjacent to the oil groove so as to be in fluid communication with an oil groove formed in the main frame.   The oil supply structure for a scroll compressor according to claim 11, wherein the oil groove is an annular oil groove or a rectangular oil groove.   The oil supply structure for a scroll compressor according to claim 11, wherein an inner diameter of the oil groove is 3.5 to 4.5 mm. A main frame having a bearing surface on which the orbiting scroll is supported;
An oil groove is formed on the bearing surface of the main frame,
2. The scroll compressor oil supply structure according to claim 1, wherein the at least one oil hole is positioned adjacent to and in fluid communication with an oil groove formed on a bearing surface of the main frame. 3.   The oil supply structure for a scroll compressor according to claim 14, wherein the oil groove is an annular oil groove or a rectangular oil groove.   The oil supply structure for a scroll compressor according to claim 14, wherein the depth of the oil groove is 3.5 to 4.5 mm.   The oil supply structure of a scroll compressor according to claim 14, wherein the oil groove is continuously in communication with the at least one oil hole.   The oil supply structure of a scroll compressor according to claim 14, wherein the oil groove is periodically in fluid communication with the at least one oil hole. A main frame having a bearing surface on which the orbiting scroll is supported;
2. The oil supply structure for a scroll compressor according to claim 1, wherein at least one oil passage is formed in the main frame to be in fluid communication with at least one oil hole formed in the orbiting scroll.   The oil supply of the scroll compressor according to claim 19, wherein at least one oil passage formed in the main frame is inclined and extended with respect to a rotation center axis of a rotation shaft of the orbiting scroll. Construction.   The at least one oil passage formed in the main frame extends from a first end to a second end that opens into an oil groove formed in a bearing surface of the main frame. The oil supply structure of the scroll compressor as described in 2.   The oil supply structure of the scroll compressor according to claim 21, further comprising an oil adjusting device located in at least one oil passage formed in the main frame.   The oil supply structure for a scroll compressor according to claim 21, wherein the oil groove formed in the main frame is an annular oil groove or a rectangular oil groove.   The oil supply structure for a scroll compressor according to claim 21, wherein the depth of the oil groove is 3.5 to 4.5 mm.   2. The scroll compressor oil supply structure according to claim 1, wherein the at least one oil hole has a constant inner diameter. A main frame having a bearing surface on which the orbiting scroll is supported;
An oil groove is formed on the bearing surface of the main frame,
2. The oil supply structure for a scroll compressor according to claim 1, wherein an oil groove formed on a bearing surface of the main frame is positioned on one side of a turning locus of the at least one oil hole.   The oil supply structure for a scroll compressor according to claim 25, wherein the oil groove formed on the bearing surface of the main frame is an annular oil groove or a rectangular oil groove.   A scroll compressor comprising the oil supply structure according to claim 1. With fixed scrolling,
An orbiting scroll disposed adjacent to the fixed scroll and forming a compression chamber with the fixed scroll; and
A bearing surface on which the orbiting scroll is supported, and a main frame having a boss insertion hole into which a boss portion of the orbiting scroll is inserted,
The main frame is formed with at least one oil passage that allows oil stored in the boss insertion hole to flow between a disk portion of the orbiting scroll and a bearing surface of the main frame. Oil supply structure for scroll compressor.   30. The scroll compressor oil supply structure according to claim 29, wherein the at least one oil passage extends from the boss insertion hole to a bearing surface of the main frame.   30. The oil supply structure for a scroll compressor according to claim 29, wherein at least one central axis of the oil passage is inclined and extended with respect to a rotation central axis of the rotation axis of the orbiting scroll.   30. The oil supply structure of a scroll compressor according to claim 29, further comprising an oil adjusting device located in at least one oil passage formed in the main frame. In a scroll compressor including a fixed scroll and an orbiting scroll disposed adjacent to the fixed scroll to form a compression chamber,
Providing at least one oil hole formed in the orbiting scroll so that oil is supplied to the compression chamber;
The orbiting scroll is supported by at least one hole so that the at least one oil hole communicates with the oil passage and oil is continuously or periodically injected into the compression chamber when the orbiting scroll rotates. And a method of supplying oil to a compression chamber of a scroll compressor, the method comprising: positioning adjacent to an oil passage formed on a bearing surface of a main frame. The step of positioning comprises:
A main frame that supports the orbiting scroll so that the at least one oil hole is communicated with the oil passage and oil is continuously injected into the compression chamber when the orbiting scroll rotates. 34. The method of supplying oil to a compression chamber of a scroll compressor according to claim 33, further comprising a step of being positioned adjacent to an oil passage formed in a bearing surface of the scroll compressor. The step of positioning comprises:
The at least one oil hole supports the orbiting scroll so that the at least one oil hole communicates with the oil passage and oil is periodically injected into the compression chamber when the orbiting scroll rotates. 34. The method of supplying oil to a compression chamber of a scroll compressor according to claim 33, further comprising the step of positioning adjacent to an oil passage formed in a bearing surface of the frame.

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