KR20070074300A - Rotary compressor - Google Patents

Abstract

A rotary compressor is provided to smoothly supply oil to whole gaps between vanes and vane grooves by supplying oil through oil supply paths formed at rears of the vane grooves. A rotary compressor includes compression chambers(31,32), vanes(43,53) moving back and forth in a radial direction of the compression chambers, and vane grooves(44,54) containing the vanes with guiding the movement of the vanes. Oil supply paths(81,82) are connected with rears of the vane grooves. The oil supply paths are opened when the vanes move forward to the compression chambers. The oil supply paths are closed when the vanes move backward.

Description

Rotary Compressor {ROTARY COMPRESSOR}

1 is a cross-sectional view showing the configuration of a rotary compressor according to a first embodiment of the present invention, showing a state in which the compression operation is performed in the first compression chamber.

FIG. 2 is a cross-sectional view taken along line II-II 'of FIG. 1.

3 is a cross-sectional view showing the configuration of the rotary compressor according to the first embodiment of the present invention, showing a state in which the idle rotation is made in the first compression chamber.

4 is a cross-sectional view taken along line IV-IV 'of FIG. 3.

FIG. 5 illustrates a fuel supply path of a rotary compressor according to a second embodiment of the present invention, and illustrates a state in which a compression operation is performed in the first compression chamber.

FIG. 6 is a view illustrating an oil supply path of a rotary compressor according to a second embodiment of the present invention, and illustrates a state where idling is performed in a first compression chamber.

Explanation of symbols on the main parts of the drawings

10: sealed container, 20: electric element,

21: axis of rotation, 30: compression element,

31: the first compression chamber, 32: the second compression chamber,

35: middle plate, 43: first vane,

44: first vane home, 53: second vane,

54: second vane groove, 60: vane control device,

61: high pressure pipe, 62: low pressure pipe,

63: high pressure open and close valve, 64: low pressure open and close valve,

81, 82: oil supply passage, 90: oil supply piping.

The present invention relates to a rotary compressor, and more particularly to a rotary compressor to supply the oil toward the vane groove is installed.

Japanese Laid-Open Patent Publication No. 2003-269352 discloses a multi-stage compression type rotary compressor having an oil supply passage for supplying oil toward a vane groove for guiding the vane's progression.

The oil supply passage of this rotary compressor is configured such that the outer surface side of the cylinder and one inner surface of the vane groove communicate with each other. This is because the oil is supplied through the oil passage when the vane moves forward and smoothly lubrication between the outer surface of the vane and the inner surface of the vane groove while maintaining the airtightness of the gap.

However, such a rotary compressor has a drawback in that it is difficult to uniformly supply oil to both sides of the vane because the oil passage communicates with one inner surface of the vane groove.

In addition, the rotary compressor as disclosed in the Republic of Korea Patent Publication No. 10-2005-0062218 is to be able to restrain any one of the vanes respectively installed in the plurality of compression chambers in order to change the compression capacity. However, when supplying oil to the constrained vanes with one vane constrained like this rotary compressor, the oil flows into the compression chamber, which is idling through the gap between the vanes and the vane groove, and the driving load increases. This could happen. Therefore, such a rotary compressor needed to block the oil supply to the constrained vanes when the vanes were constrained.

The present invention is to solve this problem, it is an object of the present invention to provide a rotary compressor that can be supplied smoothly to the gap between the vane and the vane groove.

It is another object of the present invention to provide a rotary compressor which allows the vane groove side oil passage to be shut off when the vane stops to change the compression capacity.

The rotary compressor according to the present invention for achieving this object includes a compression chamber, a vane moving forward and backward in the radial direction of the compression chamber, and a vane groove for guiding the vane's progression and accommodating the vane, and the rear of the vane groove. And an oil supply passage in communication with the oil passage, wherein the oil passage is opened when the vane is advanced toward the compression chamber and closed by the vane when the vane is retracted.

In another aspect, the present invention is characterized in that it further comprises a vane control device for restraining or restraining the vane for the control of the compression capacity.

In addition, the vane control device includes a low pressure pipe for applying suction pressure to the back of the vane groove, a high pressure pipe for applying a discharge pressure to the back of the vane groove, and an opening / closing valve for selectively opening and closing the low pressure pipe and the high pressure pipe. Characterized in that.

The on-off valve may include a low pressure switch valve for opening and closing the low pressure pipe, and a high pressure switch valve for opening and closing the high pressure pipe.

In addition, the rotary compressor according to the present invention includes an airtight container containing an oil, and a compression element installed in the airtight container, the compression element of the first and second compression chambers and the first and second compression chambers are mutually partitioned First and second vanes, respectively, radially advancing, and first and second vane grooves for guiding the advancing and receiving of the first and second vanes, respectively, the first vanes for varying compression capacity; It characterized in that it comprises a vane control device for controlling the advancing and the oil supply passage communicating with the rear of the first vane groove.

In addition, the oil passage is open when the first vane is advanced toward the first compression chamber, characterized in that the first vane is closed by the first vane when the retreat.

The present invention also includes an intermediate plate that divides the first compression chamber and the second compression chamber, wherein the oil supply passage is formed in the intermediate plate so that the rear of the first vane groove and the second vane groove communicate with each other. The second vane groove rear is in communication with the inside of the hermetic container.

In addition, the present invention is characterized in that the first compression chamber and the first vane groove is located above the second compression chamber and the second vane groove.

The vane control device may further include a low pressure pipe applying suction pressure to the rear of the first vane groove, a high pressure pipe applying discharge pressure to the rear of the first vane groove, and selectively opening and closing the low pressure pipe and the high pressure pipe. It characterized in that it comprises an on-off valve.

In addition, the oil supply passage is characterized in that it comprises an oil supply pipe connecting the upstream side of the open and close valve of the high pressure pipe and the closed vessel.

Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in detail.

1 to 4 show a rotary compressor according to a first embodiment of the present invention. As shown in FIG. 1, the rotary compressor of the first embodiment is installed at an inner upper portion of the hermetic container 10, and is installed at an inner lower portion of the hermetic container 10. And a compression element 30 connected via 21.

The transmission element 20 is a cylindrical stator 22 fixed to the inner surface of the hermetic container 10, the rotor 23 is rotatably installed in the interior of the stator 22 and the center of the rotor 23 coupled to the rotating shaft 21 Include. The transmission element 20 drives the compression element 30 by rotating the rotating shaft 21, the rotor 23 that rotates in accordance with the power applied.

The compression element 30 is provided in the housing having the first compression chamber 31 and the second compression chamber 32 in the upper part partitioned apart from each other, and in the first and second compression chambers 31 and 32, respectively, And first and second compression units 40 and 50 operated by 21.

The housing of the compression element 30 has a first body 33 and a second compression chamber 32 formed thereon and a second body installed below the first body 33. 34) of the intermediate plate 35 and the first compression chamber 31 provided between the first and second bodies 33 and 34 to partition the first compression chamber 31 and the second compression chamber 32; A first and a second mounted on the upper part of the first body 33 and the lower part of the second body 34 so as to close the upper opening and the lower opening of the second compression chamber 32 and support the rotating shaft 21. It includes two flanges 36 and 37. The rotary shaft 21 penetrates the centers of the first and second compression chambers 31 and 32 to operate the compression units 40 and 50 in the first and second compression chambers 31 and 32.

The first and second compression units 40 and 50 may include first and second eccentric parts 41 and 51 provided on the outer surfaces of the rotation shafts 21 of the first and second compression chambers 31 and 32, respectively. And first and second rollers 42 and 52 rotatably coupled to the outer surfaces of the first and second eccentric portions 41 and 51 to rotate in contact with the inner surfaces of the second compression chambers 31 and 32, respectively. do. The first eccentric portion 41 and the second eccentric portion 51 provided on the outer surface of the rotary shaft 21 are eccentric in opposite directions to maintain balance.

In addition, the first and second compression units 40 and 50 move in the radial direction of each of the compression chambers 31 and 32 as the first and second rollers 42 and 52 rotate, respectively. It includes a first vane 43 and a second vane 53 for partitioning. As shown in FIGS. 1 and 2, the first and second vanes 43 and the second vanes 53 have first and second vane grooves 44 and 54 formed to be elongated in the radial direction of each of the compression chambers 31 and 32. ) Is guided to advance and retreat. In addition, the vane spring 55 for pressing the second vane 53 toward the second roller 52 so that the second vane 53 partitions the second compression chamber 32 in the second vane groove 54. This is installed.

The first vane groove 44 is applied with the suction pressure to the first vane groove 44 to restrain the first vane 43 or the discharge pressure to the first vane groove 43 to apply the suction pressure to the first vane groove 43. The vane control device 60 is installed to allow the advance and retreat of the vehicle. The vane control device 60 allows the compression capacity to vary by compressing or idling on the first compression chamber 31 side by restraining or restraining the first vane 43 in this manner. The concrete structure and operation | movement of this vane control apparatus 60 are mentioned later.

In addition, the first compression chamber 31 and the second compression chamber 32 are suction ports 73 connected to suction pipes 71 and 72 so that gas can be introduced into the inside, and the gas compressed therein is sealed. 10 are provided with discharge ports 75 and 76 for discharging to the inside. Therefore, when the compressor is operated, the inside of the sealed container 10 is maintained at a high pressure by the compressed gas discharged through the discharge ports 75 and 76, and the compressed gas inside the sealed container 10 is placed on the top of the sealed container 10. Guided to the outside through the discharge pipe 77 is provided. The suctioned gas passes through the accumulator 78 and is then guided through the suction pipes 71 and 72 to the suction ports of the respective compression chambers 31 and 32.

As illustrated in FIG. 1, the vane control device 60 that controls the operation of the first vane 43 may include a first vane groove 44 so that a discharge pressure may be applied to the rear of the first vane groove 44. High pressure pipe 61 connecting the rear and discharge pipe 77, the rear of the first vane groove 44 and the suction pipe 70 so that the suction pressure can be applied to the rear of the first vane groove 44 It includes a low pressure pipe 62, a high pressure open and close valve 63 for opening and closing the high pressure pipe 61, and a low pressure open and close valve 64 for opening and closing the low pressure pipe 62. The discharge pressure is applied to the rear of the first vane groove 44 when the high pressure open / close valve 63 is opened and the low pressure open / close valve 64 is closed, and the high pressure open / close valve 63 is closed and the low pressure open / close valve 64 is closed. When the suction is to be applied to the rear of the first vane groove (44) when it is opened.

Accordingly, when the first vane 43 is pushed toward the first compression chamber 31 by the discharge pressure when the discharge pressure is applied to the rear of the first vane groove 44, the first vane 43 is moved forward and backward according to the eccentric rotation of the first roller 42. All. On the other hand, when the suction pressure is applied to the first vane groove 44, the first vane 43 is stopped in the retracted state, so idling is performed in the first compression chamber 31.

As such, the vane control device 60 may vary the compression capacity by controlling the advancing of the first vanes 43 so that compression or idling is performed on the first compression chamber 31.

That is, when the compressor is operated while the high pressure open / close valve 63 is opened and the low pressure open / close valve 64 is closed, as shown in FIGS. 1 and 2, the first vane 43 is the first vane groove 44. Since the pressure is applied to the first compression chamber 31 by the discharge pressure acting on), the first vane 43 is advanced. Therefore, in this case, since the compression operation is performed in both the first compression chamber 31 and the second compression chamber 32, a large capacity compression is achieved.

On the contrary, when the compressor is operated in a state in which the high pressure open / close valve 63 is closed and the low pressure open / close valve 64 is opened, as shown in FIGS. 3 and 4, the first vane 43 is the first vane groove 44. It is retracted by the suction pressure acting on) to maintain the stopped state. Therefore, in this case, idling is performed in the first compression chamber 31, and the compression operation is performed only in the second compression chamber 32, so that the compression capacity is reduced.

In addition, the rotary compressor of the present invention is filled with oil in the inner lower portion of the sealed container 10 so that the oil can be supplied to the portion where the friction occurs and the airtight portion is required. When the rotating shaft 21 rotates, the oil passes through the oil supply passage 80 inside the rotating shaft 21 toward the friction portion of the outer surface of the rotating shaft 21 and the rollers 42 and 52 inside the respective compression chambers 31 and 32. Supplied for lubrication and airtight

In addition, an oil supply path 81 is formed in the second flange 37 below the second vane groove 54 so that oil can flow into the second vane groove 54 rearward, and the rear side of the first vane groove 44. An oil supply passage 82 is also formed in the intermediate plate 35 between the backs of the second vane grooves 54 so that the oil of the second vane grooves 54 may flow into the first vane grooves 44. The first and second vanes 43 and 53 and the first and second vanes retreat by supplying oil to the rear of the first and second vane grooves 44 and 54 through the oil passages 81 and 82. The oil is supplied to the gap between the grooves 44 and 54 so as to be lubricated and airtight. In particular, the oil is supplied evenly through the oil supply paths 81 and 82 behind the first and second vane grooves 44 and 54 so as to evenly supply the gap between the vanes 43 and 53 and the vane grooves 44 and 54. It would be possible.

On the other hand, the rotary compressor of the present invention is preferably such that the height of the oil to be filled in the sealed container 10 to maintain the height of the intermediate plate (35). If the oil is higher than the height of the intermediate plate 35 and a large amount of oil flows into the rear of the first vane groove 44, the oil may adversely affect the control operation of the first vane 43, and the oil height If the lower than the intermediate plate 35 is because the oil supply to the first vane groove 44 may not be smooth.

The operation of supplying oil to the first vane groove 44 when the rotary compressor operates is performed as follows.

When the compression operation is made in the first compression chamber 31 (when the high pressure open / close valve is opened and the low pressure open / close valve is closed), as shown in FIG. 1, the first vane 43 causes the first vane 43 to move forward and backward. Pressure change occurs behind the vane groove (44). This pressure change allows oil to flow into the back of the first vane groove 44 through the oil supply passage 82 of the intermediate plate 35. That is, oil is introduced by the pumping phenomenon due to the pressure change. In this case, since the second vane 53 also advances and retreats, oil flows into the first vane groove 44 because oil flows behind the second vane groove 54.

When idling is performed in the first compression chamber 31 (when the high-pressure open / close valve is closed and the low-pressure open / close valve is opened), as shown in FIGS. 3 and 4, the first vane 43 is retracted to form an intermediate plate. Since the oil supply passage 82 of the 35 is blocked, oil does not flow into the first vane groove 44. In this case, since the oil supply passage 82 of the intermediate plate 35 is blocked by the first vane 43, the first vane groove 44 is blocked from the high pressure region. Therefore, since the discharge pressure is not applied to the first vane groove 44, the first vane 43 may be retreated (stop state).

5 and 6 show another embodiment of the oil supply passage toward the first vane groove 44 of the rotary compressor according to the second embodiment of the present invention. In the second embodiment, the oil supply pipe 90 connecting the lower portion of the sealed container 10 and the upstream of the high pressure opening / closing valve 63 of the high pressure pipe 61 is installed instead of the oil passage of the intermediate plate 35. The same as in the first embodiment of the other configuration.

In the second embodiment, when the high pressure open / close valve 63 is opened and the low pressure open / close valve 64 is closed (the compression operation is performed in the first compression chamber), as shown in FIG. 5, the first vane groove 44 Discharge pressure is applied to the first vane (43). In this case, a pressure change occurs at the rear of the first vane groove 44 by the advancing and retracting operation of the first vane 43. The oil flows into the first vane groove 44 due to the pressure change. The oil supply to the first vane groove 44 side is made.

On the contrary, when the high pressure open / close valve 63 is closed and the low pressure open / close valve 64 is opened (the first compression chamber is idling), as shown in FIG. 6, the suction pressure behind the first vane groove 44 is shown. This action causes the first vane 43 to stop in the retracted state. In this case, since the high pressure open / close valve 63 is closed, oil does not flow into the first vane groove 44.

As described in detail above, the rotary compressor according to the present invention is because the oil supply to the vane groove through the oil supply path formed in the rear of the vane groove effect that the oil can be smoothly supplied throughout the gap between the vane and the vane groove There is.

In addition, the present invention not only prevents the inflow of oil into the vane groove because the oil supply passage communicating with the vane groove is blocked by the high-pressure opening and closing valve of the vane or vane control device when stopping the operation of the vane for the variable compression capacity. Since the vane groove can be blocked from the high pressure region, there is an effect that can smoothly control the compression capacity.

Claims (14)

In the rotary compressor comprising a compression chamber, a vane moving forward and backward in the radial direction of the compression chamber, and a vane groove for guiding the vane advancement and receiving the vane, An oil supply passage communicating with the back of the vane groove; And the fuel passage is opened when the vanes advance toward the compression chamber and closed by the vanes when the vanes retreat. The method of claim 1, And a vane control device for restraining or releasing the vanes for controlling the compression capacity. The method of claim 2, The vane control device includes a low pressure pipe applying suction pressure to the back of the vane groove, a high pressure pipe applying discharge pressure to the back of the vane groove, and an on / off valve for selectively opening and closing the low pressure pipe and the high pressure pipe. Rotary compressor, characterized in that. The method of claim 3, The on-off valve includes a low pressure open and close valve for opening and closing the low pressure pipe, and a high pressure open and close valve for opening and closing the high pressure pipe. In the rotary compressor comprising a compression chamber, a vane moving forward and backward in the radial direction of the compression chamber, and a vane groove for guiding the vane advancement and receiving the vane, And a vane control device for controlling the advancing and retreating of the vanes for varying the compression capacity, and an oil supply passage communicating with the back of the vane groove. The method of claim 5, The vane control device includes a low pressure pipe applying suction pressure to the back of the vane groove, a high pressure pipe applying discharge pressure to the back of the vane groove, and an on / off valve for selectively opening and closing the low pressure pipe and the high pressure pipe. Rotary compressor, characterized in that. The method of claim 6, And the oil supply passage includes an oil supply pipe connected to an upstream of the open / close valve of the high pressure pipe. An airtight container containing oil, and a compression element installed in the airtight container, wherein the first compression element is retracted in a radial direction of the first and second compression chambers and the first and second compression chambers, respectively. And a second vane and first and second vane grooves for guiding the retreat of the first and second vanes and receiving the vanes, respectively. And a vane control device for controlling the advancing and retreating of the first vane for varying the compression capacity, and an oil supply passage communicating with the rear of the first vane groove. The method of claim 8, And the fuel passage is opened when the first vane advances toward the first compression chamber and is closed by the first vane when the first vane retreats. The method of claim 9, An intermediate plate partitioning the first compression chamber and the second compression chamber, And the oil passage is formed in the intermediate plate so that the rear of the first vane groove and the second vane groove communicate with each other, and the rear of the second vane groove communicates with the inside of the sealed container. The method of claim 10, And the first compression chamber and the first vane groove are located above the second compression chamber and the second vane groove. The method of claim 8, The vane control device includes a low pressure pipe applying suction pressure to the rear of the first vane groove, a high pressure pipe applying discharge pressure to the rear of the first vane groove, and an opening and closing to selectively open and close the low pressure pipe and the high pressure pipe. Rotary compressor comprising a valve. The method of claim 12, The on-off valve includes a low pressure open and close valve for opening and closing the low pressure pipe, and a high pressure open and close valve for opening and closing the high pressure pipe. The method of claim 13, And the oil supply passage includes an oil supply pipe connecting the upstream side of the high pressure open / close valve of the high pressure pipe and the lower portion of the sealed container.

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