Scroll compressor, air conditioner

Abstract

The present invention provides a scroll compressor and an air conditioner. The scroll compressor includes a moving scroll and a stationary scroll. A keyway is provided on a side of a base plate of the moving scroll away from the stationary scroll. The scroll compressor further includes a cross slip ring having a key, and the key is installed in the keyway to prevent the rotation of the moving scroll. A first oil guiding channel is formed on the moving scroll, and a second oil guiding channel is formed on the cross slip ring. During the translational movement of the moving scroll, the lubricating oil in the upper bracket oil sump can intermittently enter the outer circumferential region of the mating surface between the moving scroll and the stationary scroll through the second oil guiding channel and the first oil guiding channel. According to the present invention, the lubricating oil in the upper bracket oil sump can intermittently enter the mating surface between the moving scroll and the stationary scroll, effectively increasing lubrication and reducing frictional work, and at the same time, effectively preventing the occurrence of the phenomenon that the moving scroll may tip over due to the continuous connection of the lubricating oil guiding channels.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor design, and particularly relates to a scroll compressor and an air conditioner. Background Art

[0002] Scroll compressors are widely used in refrigeration air conditioners and heat pumps due to their high efficiency, small size, light weight, and stable operation. Generally, a scroll compressor is composed of a closed housing, a stationary scroll plate, a moving scroll plate, a bracket, a crankshaft, an anti-rotation mechanism, an oil supply device, and an electric motor. The profiles of the moving and stationary scroll plates are both spiral. The moving scroll plate is eccentric relative to the stationary scroll plate and is installed with a 180° difference. Thus, a plurality of crescent-shaped spaces are formed between the moving and stationary scroll plates. When the moving scroll plate rotates around the center of the stationary scroll plate and makes a non-rotating reciprocating translation with a certain rotation radius, the outer crescent-shaped spaces will continuously move towards the center. At this time, the refrigerant is gradually pushed towards the central space, its volume continuously shrinks while the pressure continuously rises until it communicates with the central exhaust hole, and the high-pressure refrigerant is discharged from the pump body, completing the compression process.

[0003] During the operation of the compressor, the electric motor drives the crankshaft to always perform a rotational motion, and the moving plate follows the crankshaft to always perform a reciprocating translation. This motion process will cause the end faces of the moving and stationary plates to always rub against each other. If there is no refrigerating oil to lubricate the end faces at this time, it will cause abnormal wear of the end faces, and the power consumption of the compressor will increase. At this time, refrigerating oil is required for cooling and lubrication. A scroll compressor is disclosed in the prior art. This scroll compressor designs an oil circuit that communicates through the upper bracket and the stationary plate to lead the oil in the oil pool of the upper bracket to the end faces of the moving and stationary plates. In order to prevent a large amount of lubricating oil from possibly spraying out when the moving plate is tilted, it is necessary to add a throttle screw as a component to reduce excessive oil introduction, thereby preventing the moving plate from overturning. This structure makes the structural design complex and the assembly more troublesome. Summary of the Invention

[0004] Therefore, the present invention provides a scroll compressor and an air conditioner, which can overcome the deficiencies in the prior art that a throttle component needs to be provided in the lubricating oil passage between the moving scroll plate and the stationary scroll plate of the scroll compressor to throttle and prevent the moving plate from overturning, resulting in a complex compressor structure and inconvenient assembly.

[0005] To solve the above problems, the present invention provides a scroll compressor, including an opposed moving scroll plate and a stationary scroll plate. A keyway is provided on one side of the base plate of the moving scroll plate away from the stationary scroll plate. The scroll compressor further includes a cross slip ring having a key, and the key is installed in the keyway to prevent the rotation of the moving scroll plate. A first oil guiding channel is formed on the moving scroll plate, and a second oil guiding channel is formed on the cross slip ring. During the reciprocating translation of the moving scroll plate, the lubricating oil in the oil pool of the upper bracket can intermittently enter the outer circumferential region of the mating surface between the moving scroll plate and the stationary scroll plate through the second oil guiding channel and the first oil guiding channel.

[0006] In some embodiments, the inlet of the first oil guiding channel is located on the groove wall of the keyway, and the outlet of the second oil guiding channel is located on the wall of the key corresponding to the inlet. During the translational movement of the moving scroll, the outlet and the inlet can be intermittently connected and closed.

[0007] In some embodiments, the scroll compressor further includes an upper bracket, an oil sump of the upper bracket is formed on the side of the upper bracket facing the moving scroll, and a third oil guiding channel is also formed on the upper bracket. The lubricating oil in the oil sump of the upper bracket enters the second oil guiding channel through the third oil guiding channel.

[0008] In some embodiments, an oil storage groove is provided at the outlet position of the third oil guiding channel; and / or, the third oil guiding channel includes a third radial oil passage extending along the radial direction of the upper bracket and a third axial oil passage extending along the axial direction of the upper bracket.

[0009] In some embodiments, the second oil guiding channel includes a second axial oil passage communicating with the oil storage groove and extending along the axial direction of the cross slip ring, a first horizontal oil passage intermittently communicating with the first oil guiding channel, a fourth axial oil passage parallel to the second axial oil passage, and a second radial oil passage communicating the second axial oil passage and the fourth axial oil passage.

[0010] In some embodiments, a first sinking groove is formed on the groove wall of the keyway, and the inlet of the first oil guiding channel is located in the first sinking groove.

[0011] In some embodiments, a second sinking groove is formed on the side of the base plate of the moving scroll facing the stationary scroll, and the first oil guiding channel communicates with the first sinking groove and the second sinking groove.

[0012] In some embodiments, the first oil guiding channel includes a first radial oil passage communicating with the first sinking groove and extending along the radial direction of the moving scroll and a first axial oil passage communicating with the second sinking groove and extending along the axial direction of the moving scroll.

[0013] In some embodiments, there are two keys, and two keyways are correspondingly provided.

[0014] The present invention also provides an air conditioner, including the above-mentioned scroll compressor.

[0015] For a scroll compressor and an air conditioner provided by the present invention, along with the translational movement of the moving scroll, the lubricating oil in the oil sump of the upper bracket can intermittently enter the mating surface between the moving scroll and the stationary scroll, effectively increasing lubrication and reducing frictional work, and at the same time, effectively preventing the phenomenon of the moving scroll tipping over that may be caused by the continuous connection of the lubricating oil guiding channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the internal structure of a scroll compressor according to an embodiment of the present invention;

[0017] Figure 2 is Figure 1 a partial structure schematic diagram in, and the arrows in the figure show the flow direction of the lubricating oil (one side);

[0018] Figure 3 is Figure 1 a top view of the moving scroll plate in;

[0019] Figure 4 is Figure 3 a sectional view taken along A-A in;

[0020] Figure 5 is Figure 3 a sectional view taken along B-B in;

[0021] Figure 6 is Figure 1 a top view of the cross slip ring in;

[0022] Figure 7 is Figure 6 a sectional view taken along C-C in;

[0023] Figure 8 is Figure 1 a top view of the upper support bracket in;

[0024] Figure 9 is Figure 8 a sectional view taken along D-D in.

[0025] The reference numerals are shown as:

[0026] 1, suction pipe; 2, upper cover; 3, stationary scroll plate; 4, moving scroll plate; 401, first sink; 402, keyway; 403, first radial oil passage; 404, first axial oil passage; 405, second sink; 5, cross slip ring; 501, first horizontal oil passage; 502, fourth axial oil passage; 503, second radial oil passage; 504, second axial oil passage; 505, key; 6, upper support bracket; 601, third axial oil passage; 602, third radial oil passage; 603, oil storage tank; 6A, upper support bracket oil sump; 8, balance weight; 9, crankshaft; 10, motor; 11, housing; 12, lower support ring; 13, lower support bracket; 14, oil pump; 15, thrust plate; 16, lower cover; 17, rotor; 18, exhaust pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Referring to in combination Figures 1 to 9 shown, specifically as Figure 1As shown in the figure, the scroll compressor mainly consists of a motor 10, an upper bracket 6, a lower bracket 13, a stationary scroll 3, a moving scroll 4, a cross slip ring 5, a crankshaft 9, etc. The motor 10 is fixed on the housing 11 by hot fitting, and the upper bracket 6 is fixed on the housing 11 by eight-point welding. The moving scroll 4 and the stationary scroll 3 are oppositely installed on the upper bracket 6 with a phase angle difference of 180°. The moving scroll 4 moves under the drive of the crankshaft 9 and meshes with the stationary scroll 3 to form a series of crescent-shaped sealed cavities that are isolated from each other and have continuously changing volumes. The stationary scroll 3 is fixed on the upper bracket 6 by screw fasteners. The lower bracket 13 is fixed on the lower support ring 12 by screws, and the lower support ring 12 is then fixed on the housing 11 by spot welding. When the compressor is running, the motor 10 drives the crankshaft 9 to rotate. The crank of the crankshaft 9 drives the moving scroll 4 to move. Under the anti-rotation restriction of the cross slip ring 5, the moving scroll 4 makes a translational motion around the center of the crankshaft 9 with a fixed radius. The refrigerant entering from the suction pipe is sucked into the crescent-shaped suction cavity formed by the moving scroll 4 and the stationary scroll 3, and after compression, it is discharged from the exhaust hole of the stationary scroll 3 and enters the cavity between the upper cover 2 and the stationary scroll 3. Then, it enters the cavity between the stationary scroll 3 and the upper bracket 6 through the exhaust groove of the stationary scroll 3 and the upper bracket 6. Part of it enters the lower end of the motor 10 through the flow channel between the motor 10 and the housing 11, and finally the high-pressure exhaust refrigerant is discharged from the exhaust pipe 18 out of the compressor.

[0028] On one side of the base plate of the moving scroll 4 away from the stationary scroll 3, a keyway 402 is provided. The cross slip ring 5 has a key 505, and the key 505 is installed in the keyway 402 to prevent the rotation of the moving scroll 4. A first oil guiding channel is constructed on the moving scroll 4, and a second oil guiding channel is constructed on the cross slip ring 5. During the translational motion of the moving scroll 4, the lubricating oil in the upper bracket oil sump 6A can intermittently enter the outer circumferential region (which is a low-pressure region) of the mating surface between the moving scroll 4 and the stationary scroll 3 through the second oil guiding channel and the first oil guiding channel. In this technical solution, along with the translational motion of the moving scroll 4, the lubricating oil in the upper bracket oil sump 6A can intermittently enter the mating surface between the moving scroll 4 and the stationary scroll 3. While effectively increasing lubrication and reducing frictional work, it can also effectively prevent the phenomenon of the moving scroll tipping over that may be caused by the continuous connection of the lubricating oil guiding channels. The structure is simple and easy to assemble, and the cost is relatively low.

[0029] In some embodiments, the inlet of the first oil guiding channel is located on the groove wall of the keyway 402, and the outlet of the second oil guiding channel is located on the wall body of the key 505 corresponding to the inlet. During the translational movement of the orbiting scroll 4, since the positions of the key 505 and the keyway 402 change along with the translational movement, the relative positions of the outlet and the inlet change, so that the outlet and the inlet can be intermittently connected and closed. In this technical solution, by changing the relative positions of the outlet and the inlet caused by the change in the relative positions of the orbiting scroll 4 and the cross slide ring 5 during the translational movement of the orbiting scroll 4, the change and on-off of the oil guiding flow rate are realized. There is no need to separately provide corresponding throttling components, control components, etc., which simplifies the structure of the compressor and can also reduce the design and manufacturing costs.

[0030] The upper bracket oil sump 6A is formed on the side of the upper bracket 6 facing the orbiting scroll 4. A third oil guiding channel is also formed on the upper bracket 6. The lubricating oil in the upper bracket oil sump 6A enters the second oil guiding channel through the third oil guiding channel. By forming the third oil guiding channel on the upper bracket 6, there is no need to separately provide a corresponding oil guiding pipe structure, which simplifies the structure and makes the assembly more convenient.

[0031] In some embodiments, an oil storage groove 603 is provided at the outlet position of the third oil guiding channel, which can temporarily store the lubricating oil to ensure the oil guiding efficiency of the second oil guiding channel and the first oil guiding channel. Specifically, the third oil guiding channel includes a third radial oil channel 602 extending along the radial direction of the upper bracket 6 and a third axial oil channel 601 extending along the axial direction of the upper bracket 6. The second oil guiding channel includes a second axial oil channel 504 communicating with the oil storage groove 603 and extending along the axial direction of the cross slide ring 5, a first horizontal oil channel 501 intermittently communicating with the first oil guiding channel, a fourth axial oil channel 502 parallel to the second axial oil channel 504, and a second radial oil channel 503 communicating the second axial oil channel 504 and the fourth axial oil channel 502, making the oil guiding of the lubricating oil in the third oil guiding channel and the second oil guiding channel more efficient.

[0032] In some embodiments, a first sunk groove 401 is formed on the groove wall of the keyway 402, and the inlet of the first oil guiding channel is located in the first sunk groove 401. The flow-through area of the first sunk groove 401 is larger than that of the inlet of the first oil guiding channel, so that the connection time between the outlet of the second oil guiding channel and the inlet of the first oil guiding channel can be prolonged, ensuring that the introduced amount of lubricating oil is sufficient. At the same time, the internal oil guiding diameter of the first oil guiding channel can be designed to be relatively small, preventing excessive reduction of the structural strength of the substrate. A second sunk groove 405 is formed on the side of the substrate of the moving scroll 4 facing the stationary scroll 3. The first oil guiding channel communicates with the first sunk groove 401 and the second sunk groove 405. The second sunk groove 405 can extend along the circumferential direction of the moving scroll 4 for a certain distance, so that the introduced lubricating oil can be spread more evenly on the mating surface between the moving scroll 4 and the stationary scroll 3. The first oil guiding channel includes a first radial oil passage 403 that communicates with the first sunk groove 401 and extends radially along the moving scroll 4, and a first axial oil passage 404 that communicates with the second sunk groove 405 and extends axially along the moving scroll 4.

[0033] In some embodiments, there are two keys 505, and two keyways 402 are correspondingly provided.

[0034] Specifically, as Figure 2 shown, during the operation of the compressor, the keys of the cross slip ring 5 always cover the first sunk groove 401 on the side wall of the keyway 402 of the moving scroll 4, and the supporting surface of the cross slip ring 5 always covers the oil storage groove 603 of the upper bracket 6, so that the refrigeration oil flows from the oil sump 6A of the upper bracket to the second sunk groove 405 on the substrate of the moving scroll 4 along the direction of the arrow in the figure, completing the lubrication of the end faces of the moving and stationary scrolls. When the outlet of the second oil guiding channel of the cross slip ring 5 completely coincides with the inlet of the first oil guiding channel of the moving scroll, the oil replenishment amount is the largest, and the oil replenishment amount decreases as the coincidence area decreases, achieving the effect of intermittent oil replenishment.

[0035] According to an embodiment of the present invention, there is also provided an air conditioner including the above-mentioned scroll compressor.

[0036] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that, It includes opposed moving scroll (4) and stationary scroll (3). On the side of the base plate of the moving scroll (4) away from the stationary scroll (3), there is a keyway (402). It also includes a cross slip ring (5). The cross slip ring (5) has a key (505). The key (505) is installed in the keyway (402) to prevent the rotation of the moving scroll (4). A first oil guiding channel is constructed on the moving scroll (4), and a second oil guiding channel is constructed on the cross slip ring (5). During the translational movement of the moving scroll (4), the lubricating oil in the upper bracket oil sump (6A) can intermittently enter the outer circumferential region of the mating surface between the moving scroll (4) and the stationary scroll (3) via the second oil guiding channel and the first oil guiding channel. The inlet of the first oil guiding channel is on the groove wall of the keyway (402), and the outlet of the second oil guiding channel is on the wall body corresponding to the inlet of the key (505). During the translational movement of the moving scroll (4), the outlet and the inlet can be intermittently connected and closed.

2. The scroll compressor according to claim 1, characterized in that, It also includes an upper bracket (6). The upper bracket oil sump (6A) is constructed on the side of the upper bracket (6) facing the moving scroll (4). A third oil guiding channel is also constructed on the upper bracket (6). The lubricating oil in the upper bracket oil sump (6A) enters the second oil guiding channel via the third oil guiding channel.

3. The scroll compressor according to claim 2, wherein, The outlet position of the third oil guiding channel has an oil storage groove (603); and / or, the third oil guiding channel includes a third radial oil channel (602) extending along the radial direction of the upper bracket (6) and a third axial oil channel (601) extending along the axial direction of the upper bracket (6).

4. The scroll compressor according to claim 3, wherein, The second oil guiding channel includes a second axial oil channel (504) communicating with the oil storage groove (603) and extending along the axial direction of the cross slip ring (5), a first horizontal oil channel (501) intermittently communicating with the first oil guiding channel, a fourth axial oil channel (502) parallel to the second axial oil channel (504), and a second radial oil channel (503) connecting the second axial oil channel (504) and the fourth axial oil channel (502).

5. The scroll compressor according to claim 1, characterized in that, A first sink (401) is constructed on the groove wall of the keyway (402), and the inlet of the first oil guiding channel is in the first sink (401).

6. The scroll compressor according to claim 5, characterized in that, A second sink (405) is constructed on the side of the base plate of the moving scroll (4) facing the stationary scroll (3). The first oil guiding channel communicates with the first sink (401) and the second sink (405).

7. The scroll compressor according to claim 6, wherein The first oil guiding channel includes a first radial oil channel (403) communicating with the first sink (4) and extending along the radial direction of the moving scroll (4) and a first axial oil channel (404) communicating with the second sink (405) and extending along the axial direction of the moving scroll (4).

8. The scroll compressor according to claim 1, wherein There are two keys (505), and two keyways (402) are correspondingly arranged.

9. An air conditioner, characterized in that, It includes a scroll compressor according to any one of claims 1 to 8.

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