Scroll compressor, air conditioner

Abstract

The present invention provides a scroll compressor and an air conditioner, belonging to the technical field of air conditioning. The scroll compressor includes a stationary disk, a moving disk, and a bracket. A back pressure chamber is formed on the bracket. The bracket also forms a bracket drainage channel and a throttling chamber. One end of the bracket drainage channel can communicate with the exhaust port of the stationary disk. The throttling chamber communicates with the back pressure chamber through its throttling outlet. A threaded throttling pin is arranged in the throttling chamber. The throttling chamber has a plurality of throttling inlets, and the plurality of throttling inlets are arranged at intervals along the length direction of the threaded throttling pin. The other end of the bracket drainage channel can selectively communicate with one of the plurality of throttling inlets, and the higher the air flow pressure in the bracket drainage channel, the shorter the length of the threaded throttling pin between the communicated throttling inlet and the throttling outlet. The present invention ensures that the stationary disk and the moving disk are as close as possible while the pump body operates smoothly under different operating conditions, improving the volumetric efficiency and compression efficiency of the compressor.

Description

Technical Field

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

[0002] When the scroll compressor operates at high speed, the pressure in the compression chamber is relatively large, which is extremely likely to separate the moving and stationary scroll plates by impact, resulting in a large amount of refrigerant leakage. Usually, the solution is to introduce the discharge and suction pressure to the back of the moving plate (back pressure chamber) as the back pressure to offset the huge impact force in the compression chamber. However, the pressure span in the compression chamber under different working conditions is very large. If the back pressure introduced to the back of the moving plate is too large, it is easy to cause the moving and stationary scroll plates to get stuck. If the back pressure introduced to the back of the moving plate is too small, it is easy to make the gap between the moving and stationary scroll plates too large, resulting in refrigerant leakage. Therefore, under the working characteristics of high pressure and large pressure span of the scroll compressor, how to adjust the back pressure introduced to the back of the moving plate to offset the huge impact force in the compression chamber, ensure the pump body stability of the scroll compressor, and then improve the compression efficiency and volumetric efficiency of the compressor has become the key to the research of the scroll compressor. Summary of the Invention

[0003] Therefore, the present invention provides a scroll compressor and an air conditioner, which can solve the technical problems in the prior art that the back pressure of the moving plate in the scroll compressor cannot be adjusted according to the working condition pressure of the scroll compressor, the back pressure of the moving plate is too large, resulting in the moving and stationary plates getting stuck, or too small, resulting in too large a gap between the moving and stationary plates and refrigerant leakage, and the compression efficiency and volumetric efficiency of the compressor are relatively low.

[0004] To solve the above problems, the present invention provides a scroll compressor, including a stationary plate and a moving plate that form a translational compression of the refrigerant, and a bracket for supporting the moving plate. A back pressure chamber that exerts a back pressure on the moving plate is formed on the bracket. A bracket drainage channel and a throttling chamber are also formed on the bracket. One end of the bracket drainage channel can be communicated with the exhaust port of the stationary plate. The throttling chamber is communicated with the back pressure chamber through its throttling outlet. A threaded throttling pin is arranged in the throttling chamber. The throttling chamber has a plurality of throttling inlets, and the plurality of throttling inlets are arranged at intervals along the length direction of the threaded throttling pin. The other end of the bracket drainage channel can be selectively communicated with one of the plurality of throttling inlets, and the higher the air flow pressure in the bracket drainage channel, the shorter the length of the threaded throttling pin between the communicated throttling inlet and the throttling outlet.

[0005] In some embodiments, a pressure regulating chamber is formed between the other end of the stent drainage channel and the throttling chamber, and the other end of the stent drainage channel is connected to the pressure regulating chamber through a pressure regulating inlet. A pressure following component is provided in the pressure regulating chamber, and the pressure following component can adjust the height according to the pressure of the pressure airflow entering the pressure regulating inlet and control the throttling inlet corresponding to its height to be connected to the throttling chamber.

[0006] In some embodiments, the pressure following component includes a slide plate, and a first elastic member is connected to the side of the slide plate facing the pressure regulating inlet. The slide plate can slide relative to the pressure regulating chamber under the joint action of the pressure airflow flowing into the pressure regulating inlet and the first elastic member. A cut-off valve plate is correspondingly arranged at each throttling inlet, and each cut-off valve plate has a connecting position allowing the throttling inlet to be connected and a cut-off position cutting off the connection of the throttling inlet. During the sliding process, the slide plate can move the cut-off valve plate so that the cut-off valve plate of the throttling inlet corresponding to the pressure of the pressure airflow is in the connecting position.

[0007] In some embodiments, the pressure regulating chamber and the throttling chamber are arranged adjacent to each other and the two are separated by a partition, a plurality of throttling inlets are constructed on the partition, each of the cut-off valve plates is rotatably connected to a side of the partition facing the pressure regulating chamber, and each of the cut-off valve plates is also connected to the partition via a second elastic member so that the cut-off valve plate at the throttling inlet that does not correspond to the pressure of the pressure airflow can be in the cut-off position.

[0008] In some embodiments, a slide groove is constructed on one side of the partition facing the pressure regulating chamber, and an extension direction of the slide groove is parallel to a length direction of the threaded throttling pin. The slide plate has a force-applying protruding arm slidably connected to the slide groove, and the cut-off valve plate has a force-bearing handle that blocks the notch of the slide groove.

[0009] In some embodiments, the middle area of the force-bearing handle facing the partition has a rotating shaft, the partition has a blind hole, the rotating shaft is pivotally inserted in the blind hole, and the second elastic member is connected to the side of the cut-off valve plate away from the force-bearing handle.

[0010] In some embodiments, a pressure relief channel is also formed on the bracket, one end of the pressure relief channel is connected to the back pressure chamber, the other end of the pressure relief channel is connected to the motor chamber of the scroll compressor, and the air intake port of the moving disk is connected to the motor chamber.

[0011] In some embodiments, a throttling element is provided in the pressure relief channel.

[0012] In some embodiments, the scroll compressor further includes a front cover which covers the side of the stationary disk away from the moving disk. An exhaust cavity and an exhaust passage communicating with the exhaust cavity are formed in the front cover. A front cover drainage passage is also formed in the front cover. One end of the front cover drainage passage communicates with the exhaust passage, and the other end of the front cover drainage passage communicates with the one end of the bracket drainage passage.

[0013] The present invention also provides an air conditioner including the above-mentioned scroll compressor.

[0014] In a scroll compressor and an air conditioner provided by the present invention, through the corresponding matching and connection of a plurality of throttling inlets with different air flow pressures, the higher the air flow pressure, the shorter the length of the threaded throttling pin between the throttling inlet and the throttling outlet, that is, the smaller the throttling pressure difference, and the higher the air flow pressure entering the back pressure cavity accordingly. Thus, the back pressure can offset the pressure in the compression cavity, so as to ensure that the stationary disk and the moving disk are as close as possible on the premise of the stable operation of the pump body under different operating conditions, that is, to prevent the stationary and moving disks from jamming or refrigerant leakage, achieving the effect of improving the volumetric efficiency and compression efficiency of the compressor. In addition, part of the exhaust air flow enters the back pressure cavity through the throttling inlet, and the lubricating oil mixed therein can effectively lubricate and cool the components such as the bearings at the back pressure cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the internal structure (partial) of the scroll compressor according to an embodiment of the present invention;

[0016] Figure 2 is Figure 1 a partial enlarged view of part A in

[0017] Figure 3 is Figure 1 a sectional view of the bracket in

[0018] Figure 4 is Figure 1 an assembly schematic diagram of the partition plate and the cut-off valve plate in , in which a total of seven throttling inlets are shown, and the fourth throttling inlet from top to bottom is connected, and the other throttling inlets are cut off;

[0019] Figure 5 is Figure 1 an assembly schematic diagram of the slide plate and the first elastic member in ;

[0020] Figure 6 is a schematic diagram after the pressure following assembly and the bracket are assembled;

[0021] Figure 7 is Figure 1 a three-dimensional structure schematic diagram of the cut-off valve plate in .

[0022] The reference numerals are shown as:

[0023] 11. Static disk; 111. Exhaust port; 12. Rotating disk; 13. Bracket; 131. Back pressure chamber; 132. Bracket drainage channel; 133. Throttle chamber; 1331. Throttle outlet; 1332. Throttle inlet; 1333. Shut-off valve disc; 1334. Force-receiving handle; 1335. Rotating shaft; 134. Pressure regulating chamber; 1341. Pressure regulating inlet; 2. Threaded throttle pin; 31. Slide plate; 311. Force-applying convex arm; 32. First elastic member; 33. Partition plate; 331. Slide groove; 34. Second elastic member; 41. Pressure relief flow channel; 42. Throttle member; 5. Front cover; 51. Exhaust chamber; 52. Exhaust channel; 53. Front cover drainage channel; 100. Motor chamber. Detailed implementation manners

[0024] Refer to in combination Figures 1 to 7 As shown, according to the embodiments of the present invention, specifically refer to Figure 1As shown, a scroll compressor is provided, which includes a stationary disk 11 and a moving disk 12 that form a translational compression of the refrigerant, and a bracket 13 for supporting the moving disk 12. A back pressure chamber 131 that exerts a back pressure on the moving disk 12 is formed on the bracket 13. A bracket drainage channel 132 and a throttling chamber 133 are also formed on the bracket 13. One end of the bracket drainage channel 132 can communicate with the exhaust port 111 of the stationary disk 11. The throttling chamber 133 communicates with the back pressure chamber 131 through its throttling outlet 1331. A threaded throttling pin 2 is arranged in the throttling chamber 133. The throttling chamber 133 has a plurality of throttling inlets 1332, and the plurality of throttling inlets 1332 are arranged at intervals along the length direction of the threaded throttling pin 2. The other end of the bracket drainage channel 132 can selectively communicate with one of the plurality of throttling inlets 1332, and the higher the air flow pressure in the bracket drainage channel 132, the shorter the length of the threaded throttling pin 2 between the communicating throttling inlet 1332 and the throttling outlet 1331. It can be understood that the lower the air flow pressure in the bracket drainage channel 132, the longer the length of the threaded throttling pin 2 between the communicating throttling inlet 1332 and the throttling outlet 1331. The aforementioned threaded throttling pin 2 is specifically a pin body with a threaded throttling groove formed on its outer circumferential wall. The longer its length, the longer the throttling length, and the greater the throttling pressure difference formed by the inflowing and outflowing air flow. On the contrary, the shorter the length, the shorter the throttling length, and the smaller the throttling pressure difference formed by the inflowing and outflowing air flow. Only one of the plurality of throttling inlets 1332 is in a communicating state for a certain air flow pressure, and the other throttling inlets 1332 are in a cut-off state. In this technical solution, through the corresponding matching communication between the plurality of throttling inlets 1332 and different air flow pressures, the higher the air flow pressure, the shorter the length of the threaded throttling pin 2 between the throttling inlet 1332 and the throttling outlet 1331, that is, the smaller the throttling pressure difference, and the higher the air flow pressure entering the back pressure chamber 133, so that the back pressure can offset the pressure in the compression chamber, thereby ensuring that the stationary disk 11 and the moving disk 12 are as close as possible on the premise of the pump body running smoothly under different operating conditions, that is, preventing the stationary and moving disks from jamming or refrigerant leakage, achieving the effect of improving the volumetric efficiency and compression efficiency of the compressor. In addition, part of the exhaust air flow enters the back pressure chamber 131 through the throttling inlet 1332, and the lubricating oil mixed therein can effectively lubricate and cool the bearings and other components at the back pressure chamber 131.

[0025] In a preferred embodiment, a pressure regulating chamber 134 is formed between the other end of the stent drainage channel 132 and the throttling chamber 133. The other end of the stent drainage channel 132 communicates with the pressure regulating chamber 134 through a pressure regulating inlet 1341. The pressure regulating chamber 134 is provided with a pressure following component. The pressure following component can adjust its height according to the pressure of the pressure air flow entering through the pressure regulating inlet 1341 and control the throttling inlet 1332 corresponding to its height to communicate with the throttling chamber 133. In this technical solution, the pressure following component can adjust its height according to the pressure of the pressure air flow entering through the pressure regulating inlet 1341 and control the throttling inlet 1332 corresponding to its height to be in a communicating state, thus realizing the matching and cancellation of the air flow pressure in the back pressure chamber 131 and the air flow pressure in the compression chamber.

[0026] In a specific embodiment, as shown in Figure 2 The pressure following component includes a slide plate 31. A first elastic member 32 (such as a spring) is connected to one side of the slide plate 31 facing the pressure regulating inlet 1341. The slide plate 31 can slide relative to the pressure regulating chamber 134 under the combined action of the pressure air flow flowing in through the pressure regulating inlet 1341 and the first elastic member 32. A cut-off valve plate 1333 is correspondingly arranged at each throttling inlet 1332. Each cut-off valve plate 1333 has a communicating position allowing the throttling inlet 1332 to communicate and a cut-off position cutting off the communication of the throttling inlet 1332. During the sliding process of the slide plate 31, it can toggle the cut-off valve plate 1333 to make the cut-off valve plate 1333 of the throttling inlet 1332 corresponding to the pressure of the pressure air flow be in the communicating position, while the remaining cut-off valve plates 1333 not in contact with the slide plate 31 are all in the cut-off position. In this way, the pressure air flow entering through the pressure regulating inlet 1341 only enters the throttling chamber 133 through the throttling inlet 1332 where the cut-off valve plate 1333 in contact with the slide plate 31 and toggled by it is in the communicating position, and enters the back pressure chamber 131 through the throttling outlet 1331 under the throttling action of the threaded throttling pin 2, forming a cancellation with the pressure of the compression chamber to ensure the fitting operation of the static disk 11 and the moving disk 12.

[0027] In some embodiments, the pressure regulating chamber 134 and the throttling chamber 133 are arranged adjacent to each other and the two are separated by a partition 33. A plurality of throttling inlets 1332 are constructed on the partition 33. Each shut-off valve piece 1333 is rotatably connected to one side of the partition 33 facing the pressure regulating chamber 134. Each shut-off valve piece 1333 is also connected to the partition 33 through a second elastic member 34, so that the shut-off valve piece 1333 at the throttling inlet 1332 that does not correspond to the pressure of the pressure airflow is in a shut-off position. In this way, in the actual processing process, the pressure regulating chamber 134 and the throttling chamber 133 can be processed into one cavity at one time, and then the partition 33 can be assembled between the two, which simplifies the processing of the cavity. More importantly, the second elastic member 34 and each shut-off valve piece 1333 can be assembled outside the two cavities to form a separate component and then assembled inside the two cavities, which can simplify the assembly process here. It can be understood that the sealing between the two cavities should be done after the partition 33 is assembled.

[0028] In some embodiments, a slide groove 331 is configured on one side of the partition 33 facing the pressure regulating chamber 134, and the extension direction of the slide groove 331 is parallel to the length direction of the threaded throttling pin 2. The slide plate 31 has a force-applying convex arm 311 slidably connected to the slide groove 331, and the cut-off valve plate 1333 has a force-bearing handle 1334 that blocks the notch of the slide groove 331. In this way, the partition 33 can slide smoothly along the guiding direction of the slide groove 331 under the action of the pressure airflow flowing into the pressure regulating inlet 1341. During its sliding process, due to The force-bearing handle 1334 is blocked at the notch, and it will be able to toggle the force-bearing handle 1334 and drive the shut-off valve plate 1333 to swing. The swinging shut-off valve plate 1333 will realize the switching of the connecting position and the shut-off position of the shut-off valve plate 1333. It can be understood that when the pressure of the pressure airflow flowing into the pressure regulating inlet 1341 is determined, the height position of the slide plate 31 will be determined. At this time, the shut-off valve plate 1333 in contact with it will be in the connecting position, and the other shut-off valve plates 1333 that are not in contact will be in the shut-off position. It should be noted that during the sliding up and down process of the slide plate 31 along the pressure regulating chamber 134, the sealing connection between the edge of the slide plate 31 and the cavity wall of the pressure regulating chamber 134 should be maintained as much as possible. In actual operation, a small gap between the edge of the slide plate 31 and the cavity wall of the pressure regulating chamber 134 can also be allowed, because the slide plate 31 is arranged relative to the pressure regulating inlet 1341, and the pressure airflow entering the pressure regulating chamber 134 will exert force on the bottom surface of the slide plate 31 ( Figure 2 The airflow entering the top surface of the slide plate 31 through the gap is throttled and depressurized. Therefore, the follow-up adjustment of the height of the slide plate 31 and the pressure of the pressure airflow will not be greatly adversely affected.

[0029] See also Figure 7As shown, the middle area on the side of the force-bearing handle 1334 facing the partition 33 has a rotating shaft 1335. There is a blind hole (not shown in the figure) on the partition 33. The rotating shaft 1335 is pivotally inserted into the blind hole. The second elastic member 34 (such as a spring) is connected to the side of the cut-off valve plate 1333 away from the force-bearing handle 1334. At this time, when the force-bearing handle 1334 contacts the force-applying convex arm 311, the force-bearing handle 1334 is driven to swing and rotate around the rotating shaft 1335, and the cut-off valve plate 1333 will be in the communication position, while the other cut-off valve plates 1333 that do not contact the force-applying convex arm 311 will be kept in the cut-off position under the action of the second elastic member 34.

[0030] In some embodiments, a pressure relief flow channel 41 is further formed on the bracket 13. One end of the pressure relief flow channel 41 is communicated with the back pressure chamber 131, and the other end of the pressure relief flow channel 41 is communicated with the motor chamber 100 of the scroll compressor. The suction port of the moving disk 2 is communicated with the motor chamber 100. Specifically, a throttling member 42 is provided in the pressure relief flow channel 41. The throttling member 42 can also be a threaded throttling pin. The pressure relief flow channel 41 can throttle the excess pressure and then release it to the low-pressure side, which not only avoids gas leakage but also reduces the power consumption loss of the compressor.

[0031] In some embodiments, the scroll compressor further includes a front cover 5. The front cover 5 covers the side of the stationary disk 11 away from the moving disk 12. An exhaust chamber 51 and an exhaust passage 52 communicated with the exhaust chamber 51 are constructed in the front cover 5. A front cover drainage channel 53 is also constructed in the front cover 5. One end of the front cover drainage channel 53 is communicated with the exhaust passage 52, and the other end of the front cover drainage channel 53 is communicated with one end of the bracket drainage channel 132. By directly constructing the front cover drainage channel 53 in the front cover 5, there is no need to separately assemble the drainage pipeline, and the structure is simpler and more compact.

[0032] The technical solution of the present invention is designed with oil and gas passages (i.e. the aforementioned front cover drainage channel 53 and the bracket drainage channel 132) on the front cover 5 and the bracket 13 according to the different refrigerant characteristics and the structural characteristics of the scroll compressor, connecting them with the exhaust chamber 51, the back pressure chamber 131 and the suction chamber (motor chamber 100), so as to realize real-time adjustment of the back pressure during the operation of the compressor. The gas in the exhaust chamber 51 sends the refrigeration oil and high-pressure gas to the corresponding passages on the bracket 13 through the oil and gas passages arranged on the front cover 5, and then transmits them to the back pressure regulating device (i.e. the pressure regulating chamber 134 and the throttling chamber 133 in the present invention) through the oil and gas passages on the bracket 13. The size of the transmitted exhaust pressure directly affects the expansion and contraction amount of the back pressure regulating spring (i.e. the first elastic member 32 in the present invention), and further affects the upper and lower positions of the back pressure regulating plate (i.e. the slide plate 31 of the present invention) and the back pressure regulating lever (i.e. the force-applying cam 311 of the present invention). When the exhaust pressure is relatively small, the back pressure required on the back of the movable disk 12 should also be relatively small. At this time, the gas force given to the back pressure regulating plate by the exhaust pressure is relatively small, and the elongation of the back pressure regulating spring is also relatively small. At this time, the back pressure regulating plate and the back pressure regulating lever are in a lower position due to the smaller elongation of the regulating spring. The back pressure regulating lever will move the back pressure regulating fan handle (that is, the force-bearing handle 1334 of the present invention) at the lower position, and use the rotation fulcrum of the back pressure regulating fan (that is, the shut-off valve plate 1333 of the present invention) as the rotation base point to open the back pressure regulating fan, so that the gas passes through the lower back pressure hole (that is, the throttling inlet 1332 of the present invention). The gas will experience a longer throttling channel before reaching the back pressure chamber 131, thereby reducing the back pressure after throttling, achieving the purpose of small back pressure, and then relieve pressure through the pressure relief channel on the other side (that is, the pressure relief channel 41 of the present invention); conversely, when the exhaust pressure is relatively large, the back pressure required on the back of the movable disk should also be relatively large. At this time, the gas force given to the back pressure regulating plate by the exhaust pressure is relatively large. , the elongation of the back-pressure regulating spring is also relatively large. At this time, the back-pressure regulating plate and the lever are in an upper position due to the large elongation of the regulating spring. The back-pressure regulating lever will move the back-pressure regulating fan handle at the upper position to open the back-pressure regulating fan and allow the gas to pass through the upper back-pressure hole. Then, the pressure from the exhaust chamber to the back-pressure regulating device will enter the upper back-pressure hole. The gas will only go through a very short throttling channel to reach the back-pressure chamber, thereby increasing the back pressure after throttling, achieving the purpose of large back pressure, and then release the pressure through the pressure relief channel on the other side; the oil and gas passage connecting the exhaust chamber 51, the back-pressure chamber 131 and the suction chamber can transport the refrigeration oil to the bearings and various parts on the low-pressure side for lubrication and cooling, thereby improving the life and reliability of the compressor; whether under high-pressure or low-pressure exhaust pressure, the back-pressure regulating device can be adjusted in real time according to the required back pressure, so that the movable and static scrolls can run smoothly and fit as closely as possible, thereby improving the compression efficiency and volumetric efficiency of the compressor.

[0033] According to an embodiment of the present invention, an air conditioner is further provided, which includes the above-mentioned scroll compressor.

[0034] Those skilled in the art can easily understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0035] 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 principle of the present invention shall 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, without departing from the technical principle of the present invention, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A scroll compressor, comprising a stationary scroll (11) and a moving scroll (12) that form a translational compression of a refrigerant, and a bracket (13) for supporting the moving scroll (12), wherein a back pressure chamber (131) that exerts a back pressure on the moving scroll (12) is formed on the bracket (13), and is characterized in that, A stent drainage channel (132) and a throttling chamber (133) are further formed on the stent (13). One end of the stent drainage channel (132) can communicate with the exhaust port (111) of the static disc (11). The throttling chamber (133) communicates with the back pressure chamber (131) through its throttling outlet (1331). A threaded throttling pin (2) is arranged in the throttling chamber (133). The throttling chamber (133) has a plurality of throttling inlets (1332). The plurality of throttling inlets (1332) are arranged at intervals along the length direction of the threaded throttling pin (2). The other end of the stent drainage channel (132) can selectively communicate with one of the plurality of throttling inlets (1332). And the higher the air flow pressure in the stent drainage channel (132), the shorter the length of the threaded throttling pin (2) between the communicated throttling inlet (1332) and the throttling outlet (1331). A pressure regulating chamber (134) is formed between the other end of the stent drainage channel (132) and the throttling chamber (133). The other end of the stent drainage channel (132) communicates with the pressure regulating chamber (134) through a pressure regulating inlet (1341). A pressure following component is arranged in the pressure regulating chamber (134). The pressure following component can adjust its height according to the pressure of the pressure air flow entering through the pressure regulating inlet (1341) and control the throttling inlet (1332) corresponding to its height to communicate with the throttling chamber (133). The pressure following component includes a slide plate (31). A first elastic member (32) is connected to one side of the slide plate (31) facing the pressure regulating inlet (1341). The slide plate (31) can slide relative to the pressure regulating chamber (134) under the combined action of the pressure air flow flowing in through the pressure regulating inlet (1341) and the first elastic member (32). A cut-off valve piece (1333) is correspondingly arranged at each throttling inlet (1332). Each cut-off valve piece (1333) has a communicating position allowing the throttling inlet (1332) to communicate and a cut-off position cutting off the communication of the throttling inlet (1332). The slide plate (31) can toggle the cut-off valve piece (1333) during the sliding process so that the cut-off valve piece (1333) of the throttling inlet (1332) corresponding to the pressure of the pressure air flow is in the communicating position. The pressure regulating chamber (134) and the throttling chamber (133) are arranged adjacent to each other and are separated by a partition plate (33). The plurality of throttling inlets (1332) are formed on the partition plate (33). Each cut-off valve piece (1333) is rotatably connected to one side of the partition plate (33) facing the pressure regulating chamber (134). Each cut-off valve piece (1333) is also connected to the partition plate (33) through a second elastic member (34) so that the cut-off valve piece (1333) at the throttling inlet (1332) not corresponding to the pressure of the pressure air flow can be in the cut-off position.One side of the partition plate (33) facing the pressure regulating chamber (134) is provided with a sliding groove (331), the extending direction of the sliding groove (331) is parallel to the length direction of the threaded throttle pin (2), the sliding plate (31) has a force applying convex arm (311) slidably connected in the sliding groove (331), and the cut-off valve piece (1333) has a force receiving handle (1334) covering the notch of the sliding groove (331).; 2. The scroll compressor according to claim 1, wherein The middle area of one side of the force-bearing handle (1334) facing the partition plate (33) is provided with a rotating shaft (1335). The partition plate (33) is provided with a blind hole, and the rotating shaft (1335) is pivotally inserted into the blind hole. The second elastic member (34) is connected to the side of the cutoff valve disc (1333) away from the force-bearing handle (1334).

3. The scroll compressor according to claim 1, wherein, A pressure relief flow passage (41) is further formed on the bracket (13). One end of the pressure relief flow passage (41) is communicated with the back pressure chamber (131), the other end of the pressure relief flow passage (41) is communicated with the motor chamber (100) of the scroll compressor, and the suction port of the moving disc (12) is communicated with the motor chamber (100).

4. The scroll compressor according to claim 3, characterized in that, A throttling member (42) is arranged in the pressure relief flow passage (41).

5. The scroll compressor according to claim 1, characterized in that, It further includes a front cover (5). The front cover (5) covers the side of the stationary disc (11) away from the moving disc (12). An exhaust chamber (51) and an exhaust passage (52) communicated with the exhaust chamber (51) are constructed in the front cover (5). A front cover drainage passage (53) is further constructed in the front cover (5). One end of the front cover drainage passage (53) is communicated with the exhaust passage (52), and the other end of the front cover drainage passage (53) is communicated with the one end of the bracket drainage passage (132).

6. An air conditioner, characterized in that, It includes the scroll compressor according to any one of claims 1 to 5.

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