Scroll compressor, air conditioner

Abstract

The present invention provides a scroll compressor and an air conditioner, belonging to the field of air conditioning technology. The scroll compressor includes a stator, a rotor, a crankshaft for driving the rotor, and an upper bracket. The crankshaft is provided with a central oil supply channel extending along its axial direction. An oil guide plate is provided at one end of the central oil supply channel remote from the rotor. The scroll compressor also includes an oil supply pipe, one end of which is connected to an area to be lubricated within the compressor. A gear oil pump is provided at the other end of the oil supply pipe. The oil supply pipe is also provided with a first oil circuit control component. When the crankshaft speed is lower than a first preset speed, the first oil circuit control component controls the oil supply pipe to be connected. When the crankshaft speed is not lower than the first preset speed, the oil supply control component controls the oil supply pipe to be cut off. The present invention provides for sufficient oil supply under both low and high compressor speed conditions.

Description

Technical Field

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

[0002] A scroll compressor primarily consists of a housing, a compression mechanism, a support mechanism, a drive mechanism, a working fluid intake pipe, and a working fluid discharge pipe. The compression mechanism consists of an orbiting scroll and a fixed scroll. The drive mechanism includes a stator assembly and a crankshaft rotor assembly. The crankshaft drives the orbiting scroll. Because the orbiting scroll is equipped with an anti-rotation mechanism, it rotates in a linear motion relative to the fixed scroll. The volume of the compression chamber defined by the spiral wraps of the fixed scroll and the orbiting scroll gradually decreases, and the refrigerant pressure in the chamber continuously increases. As the refrigerant is drawn into the compression chamber through the working fluid intake pipe, it is compressed and ultimately discharged from the exhaust port at the center of the scroll. It then exits the compressor through the working fluid discharge pipe and into the external refrigeration circuit. This completes the working cycle of refrigerant intake, compression, and discharge, and is widely used in air conditioning and heat pump applications.

[0003] In a scroll compressor, oil lubrication has a significant impact on its performance. For example, the contact area between the top and bottom teeth of the moving and static discs, the upper bracket bearing hole and the crankshaft main bearing, the contact area between the moving disc and the upper bracket, and many other areas require oil lubrication. If the oil supply is insufficient, it will cause wear on the compressor pump assembly, adversely affecting the operation of the compressor. However, if the oil supply is too much, most of the oil will be concentrated in the pump assembly consisting of the moving disc and the static disc. When the pump compresses the gas, the oil will mix with the gas compressed by the pump body and be discharged from the compressor together with the discharged gas, causing oil and gas loss in the compressor. Therefore, the oil supplied from the lower cover of the compressor to the pump body should be neither too much nor too little.

[0004] Existing scroll compressor oil supply technologies mainly include gear oil pumps and centrifugal oil supply using oil guide vanes. Gear oil pumps generally provide better oil supply at low speeds, but their performance is poor at high speeds. Centrifugal oil supply using oil guide vanes relies on strong centrifugal force to throw oil upwards, so it works better at high speeds but less so at low speeds. Summary of the Invention

[0005] Therefore, the present invention provides a scroll compressor and air conditioner, which can solve the technical problem in the prior art that the scroll compressor using only a gear oil pump to supply oil or an oil guide plate to supply oil centrifugally cannot ensure sufficient oil supply under both low and high speed conditions of the compressor.

[0006] In order to solve the above problems, the present invention provides a scroll compressor, comprising a stator, a movable plate, a crankshaft for driving the movable plate to move, and an upper bracket, wherein the crankshaft is constructed with a central oil channel extending along its axial direction, and an oil guide plate is provided at one end of the central oil channel away from the movable plate. The scroll compressor also includes an oil supply pipe, one end of the oil supply pipe is connected to the area to be lubricated in the compressor, and a gear oil pump is provided at the other end of the oil supply pipe. A first oil circuit control component is also provided on the oil supply pipe. When the rotational speed of the crankshaft is lower than a first preset rotational speed, the first oil circuit control component controls the oil supply pipe to be connected, and when the rotational speed of the crankshaft is not lower than the first preset rotational speed, the first oil circuit control component controls the oil supply pipe to be cut off.

[0007] In some embodiments, the first oil circuit control component includes an oil supply power generation component, which includes a first permanent magnet rotor and a first conductor passing through a central through hole of the first permanent magnet rotor, the crankshaft is sleeved with a first gear, the first permanent magnet rotor is sleeved with a second gear, and the first gear is engaged with the second gear. The first oil circuit control component also includes a first on-off switching component, which includes a first valve core. When the rotational speed of the crankshaft is lower than the first preset rotational speed, the induced current generated in the first conductor can drive the first valve core to a connected position. When the rotational speed of the crankshaft is not lower than the first preset rotational speed, the induced current generated in the first conductor can drive the first valve core to a cut-off position; and / or, a back pressure chamber is constructed on the upper bracket to form a back pressure on the moving disk, and the area to be lubricated in the compressor includes the back pressure chamber.

[0008] In some embodiments, the first on-off switching component also includes a first valve body, the first valve body has a first oil supply hole corresponding to the pipe mouth of the oil supply pipe, the first valve core has a first iron core, and the first iron core is wound with a first coil, and the first coil can form a circuit loop with the first conductor. The first valve body is also provided with a first magnetic component and a first elastic component, wherein the first magnetic component is arranged opposite to the first iron core, and one end of the first elastic component is connected to the first valve core and is located opposite to the first iron core.

[0009] In some embodiments, the scroll compressor further includes a first oil return pipe, one end of which is connected to the area to be lubricated in the compressor, and the other end of the first oil return pipe is connected to the oil pool. The first oil circuit control component further includes a second on-off switching component, and the second on-off switching component includes a second valve core. When the rotational speed of the crankshaft is lower than the first preset rotational speed, the induced current generated in the first conductor can drive the second valve core to be in the cut-off position. When the rotational speed of the crankshaft is not lower than the first preset rotational speed, the induced current generated in the first conductor can drive the second valve core to be in the connected position.

[0010] In some embodiments, the second on-off switching component also includes a second valve body, the second valve body has a first oil return hole corresponding to the pipe mouth of the first oil return pipe, the second valve core has a second iron core, and the second iron core is wound with a second coil, and the second coil can form a circuit loop with the first conductor. The second valve body is also provided with a second magnetic part and a second elastic part, wherein the second magnetic part is arranged opposite to the second iron core, and one end of the second elastic part is connected to the second valve core and is located opposite to the second iron core.

[0011] In some embodiments, the first conductor, the first coil, and the second coil are connected in series in a first circuit.

[0012] In some embodiments, a first resistor is connected in series with the first circuit.

[0013] In some embodiments, the rotor of the gear oil pump has a third gear, and the third gear is meshed with the second gear.

[0014] In some embodiments, the scroll compressor also includes a second oil return pipe, one end of the second oil return pipe is connected to the back cavity of the moving plate, and the other end of the second oil return pipe is connected to the oil pool. A second oil circuit control component is provided on the second oil return pipe. When the rotational speed of the crankshaft is higher than the second preset speed, the second oil circuit control component controls the second oil return pipe to be connected. When the rotational speed of the crankshaft is not higher than the second preset speed, the second oil circuit control component controls the second oil return pipe to be cut off. The second preset speed is higher than the first preset speed.

[0015] In some embodiments, the second oil circuit control assembly includes a third on-off switching component, the third on-off switching component includes a third valve body and a third valve core, the third valve body has a second return oil hole corresponding to the pipe mouth of the second return oil pipe, the third valve core has a third iron core, a third coil is wound on the third iron core, the third coil forms a circuit loop with the return oil power generation component, and the third valve body is also provided with a third magnetic part and a third elastic part, wherein the third magnetic part is arranged opposite to the third iron core, one end of the third elastic part is connected to the third valve core and is opposite to the third iron core, when the rotation speed of the crankshaft is not higher than the second preset rotation speed, the third valve core is in a state of cutting off the second return oil hole, and when the rotation speed of the crankshaft is higher than the second preset rotation speed, the third valve core is in a state of connecting to the second return oil hole.

[0016] In some embodiments, the oil return power generation component includes a transformer, a primary coil is wound on the primary side of the transformer, and a secondary coil is wound on the secondary side. The primary coil is connected in series with the first circuit, and the secondary coil is connected in series with the third coil, and the number of turns of the primary coil is less than the number of turns of the secondary coil.

[0017] In some embodiments, the oil return power generation component includes a second permanent magnet rotor and a second conductor passing through the central through hole of the second permanent magnet rotor. The second permanent magnet rotor is covered with a fourth gear, and the fourth gear is engaged with the first gear. When the rotation speed of the crankshaft is higher than the second preset rotation speed, the induced current generated in the second conductor can drive the third valve core to be in a state of cutting off the second oil return hole. When the rotation speed of the crankshaft is higher than the second preset rotation speed, the induced current generated in the second conductor can drive the third valve core to be in a state of connecting to the second oil return hole.

[0018] In some embodiments, the third coil is connected in series with a second resistor. When the first circuit is connected in series with a first resistor, the resistance of the second resistor is greater than the resistance of the first resistor.

[0019] The present invention also provides an air conditioner, comprising the scroll compressor.

[0020] The present invention provides a scroll compressor and air conditioner. The scroll compressor is equipped with an oil guide plate and a gear oil pump. When the crankshaft speed is low, the gear oil pump can also operate to supply oil while the oil guide plate supplies oil, so that the compressor has a large oil supply under this working condition, ensuring sufficient lubrication of the pump body components, and effectively overcoming the defect of insufficient oil supply when the crankshaft speed is low due to the use of the oil guide plate alone. When the crankshaft speed is high, the oil supply path of the gear oil pump is cut off, and only the oil guide plate is used for oil supply, so as to give full play to the advantage of sufficient oil supply of the oil guide plate under high-speed working conditions, reduce oil and gas mixing, and then prevent excessive oil and gas loss in the compressor, thereby taking into account sufficient oil supply under both low and high speed working conditions of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the internal structure of a scroll compressor according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Partial schematic diagram of oil supply and oil return related components;

[0023] Figure 3 for Figure 2 A partial schematic diagram of some oil supply and oil return related components;

[0024] Figure 4 for Figure 3 A schematic diagram of the internal structure of the first on-off switching component and the second on-off switching component;

[0025] Figure 5 for Figure 2 A structural diagram of the second oil return pipe in FIG.

[0026] Figure 6 for Figure 1 Schematic diagram of the principle of the oil supply power generation component or the oil return power generation component;

[0027] Figure 7 This is a partial schematic diagram of oil supply and oil return related components in another embodiment of the present invention.

[0028] The reference numerals indicate:

[0029] 11. Stator plate; 12. Rotor plate; 13. Crankshaft; 131. Central oil channel; 132. Oil guide plate; 133. First gear; 14. Upper bracket; 141. Back pressure chamber; 21. Oil supply pipe; 22. Gear oil pump; 221. Third gear; 301. First on-off switching component; 302. Second on-off switching component; 31. First permanent magnet rotor; 32. First conductor; 33. Second gear; 341. First valve core; 3411. First iron core; 3412. First coil; 342. First valve body; 343. First magnetic element; 344. First elastic element; 345. First oil supply hole; 35. First resistor; 41. First oil return pipe; 42. Second valve core; 421. Second iron core; 422. Second coil; 43. Second valve body; 44. Second magnetic element; 45 , second elastic member; 46, first oil return hole; 5, third on-off switching member; 51, second oil return pipe; 52, third valve body; 53, third valve core; 531, third iron core; 532, third coil; 54, third magnetic member; 55, third elastic member; 56, second resistor; 57, second oil return hole; 6, transformer; 71, second permanent magnet rotor; 72, second conductor; 73, fourth gear; 101, intake pipe; 102, exhaust pipe; 103, cross slip ring; 104, housing; 1051, main balance block; 1052, auxiliary balance block; 1061, first sliding bearing; 1062, second sliding bearing; 1071, oil pump fixing device; 1072, return oil power generation component fixing frame; 108, lower bracket; 1091, motor stator; 1092, motor rotor. DETAILED DESCRIPTION

[0030] See also Figures 1 to 7As shown, according to an embodiment of the present invention, a scroll compressor is provided, comprising a stator plate 11, a movable plate 12, a crankshaft 13 for driving the movable plate 12 to move (specifically, translate), and an upper bracket 14. A central oil passage 131 extending along its axial direction is constructed in the crankshaft 13. An oil guide plate 132 is provided at one end of the central oil passage 131 away from the movable plate 12. A back pressure cavity 141 is constructed on the upper bracket 14 to form a back pressure on the movable plate 12. The scroll compressor further comprises an oil supply pipe 21, one end of which is connected to the inner wall of the compressor. The area to be lubricated is connected, and the area to be lubricated in the compressor specifically includes the aforementioned back pressure chamber 141. A gear oil pump 22 is provided at the other end of the oil supply pipe 21. A first oil circuit control component is also provided on the oil supply pipe 21. When the rotation speed of the crankshaft 13 is lower than a first preset rotation speed (the specific value is different for different compressor models and can be obtained through experiments or experience), the first oil circuit control component controls the oil supply pipe 21 to be connected. When the rotation speed of the crankshaft 13 is not lower than the first preset rotation speed, the first oil circuit control component controls the oil supply pipe 21 to be cut off. In this technical solution, the scroll compressor is equipped with both an oil guide plate 132 and a gear oil pump 22. When the speed of the crankshaft 13 is low (that is, lower than the first preset speed, which also means that the operating frequency of the compressor is low), the gear oil pump 22 can also operate to supply oil while the oil guide plate 132 supplies oil, so that the compressor has a larger oil supply under this working condition, ensuring sufficient lubrication of the pump body components, and effectively overcoming the defect of insufficient oil supply when the speed of the crankshaft 13 is low when the oil guide plate 132 is used alone to supply oil. When the speed of the crankshaft 13 is high (that is, not lower than the first preset speed, which also means that the operating frequency of the compressor is high), the oil supply passage of the gear oil pump 22 is cut off, and only the oil guide plate 132 is used to supply oil, fully utilizing the advantage of sufficient oil supply of the oil guide plate 132 under high-speed working conditions, reducing oil and gas mixing, and thus eliminating excessive oil and gas loss in the compressor, thereby taking into account sufficient oil supply under low and high speed working conditions of the compressor.

[0031] In some embodiments, the first oil circuit control component includes an oil supply power generation component, which includes a first permanent magnet rotor 31 and a first conductor 32 passing through the central through hole of the first permanent magnet rotor 31. The crankshaft 13 is provided with a first gear 133, and the first permanent magnet rotor 31 is provided with a second gear 33. The first gear 133 is meshed with the second gear 33. The first oil circuit control component also includes a first on-off switching component 301. The first on-off switching component 301 includes a first valve core 341. When the rotation speed of the crankshaft 13 is lower than the first preset rotation speed, the induced current generated in the first conductor 32 can drive the first valve core 341 to the connected position. When the rotation speed of the crankshaft 13 is not lower than the first preset rotation speed, the induced current generated in the first conductor 32 can drive the first valve core 341 to the cut-off position. In this technical solution, see Figure 6As shown, the first permanent magnet rotor 31 rotates with the rotation of the crankshaft 13, while the first conductor 32 remains stationary. An induced current is generated therein, and the magnitude of this induced current increases with the increase in the rotation of the first permanent magnet rotor 31. The magnitude of this induced current can be used to adjust the position of the first valve core 341, thereby controlling the oil supply under different speed conditions. Using induced current to control the position of the first valve core 341 eliminates the need for separate control components, simplifying compressor control. It is understood that the first permanent magnet rotor 31 includes at least one pair of north and south poles, and can have a greater number of magnetic pole pairs. It can be integrally formed or assembled. The second permanent magnet rotor 71 described below can be structurally similar and will not be described in detail.

[0032] See also Figure 3 and Figure 4 As shown, in a preferred embodiment, the first on-off switching component 301 also includes a first valve body 342, the first valve body 342 has a first oil supply hole 345 corresponding to the pipe mouth of the oil supply pipe 21, the first valve core 341 has a first iron core 3411, and the first coil 3412 is wound around the first iron core 3411. The first coil 3412 can form a circuit loop with the first conductor 32, and the first valve body 342 is also provided with a first magnetic component 343 and a first elastic component 344, wherein the first magnetic component 343 is arranged opposite to the first iron core 3411, and one end of the first elastic component 344 is connected to the first valve core 341 and is located opposite to the first iron core 3411. In this way, when the induced current generated in the first conductor 32 is small or there is no induced current, under the action of the elastic force of the first elastic component 344, the first valve core 341 is in a state of connecting to the first oil supply hole. 345 is in the connected state, at this time, the gear oil pump 22 supplies oil to the upper pump body assembly through the oil supply pipe 21, so as to achieve the purpose of compensating the oil quantity of the poor low-speed oil supply capacity of the oil guide plate 132; when the induced current generated in the first conductor 32 is large enough, it will generate a large electromagnetic force at the first coil 3412 and the first iron core 3411, and the electromagnetic force attracts the first magnetic part 343 and then enables the first valve core 341 to overcome the elastic force (pulling force) of the first elastic part 344 and switch from the position of connecting to the first oil supply hole 345 to the position of cutting off the first oil supply hole 345, until the first valve core 341 is in the cut-off state of cutting off the first oil supply hole 345. It can be understood that as the rotation speed of the crankshaft 13 changes, the induced current in the first conductor 32 will also change, and the area of ​​the first valve core 341 cutting off and connecting to the first oil supply hole 345 will also be adjusted and changed accordingly.

[0033] For further reference, see Figure 3 and Figure 4The scroll compressor also includes a first oil return pipe 41, one end of which communicates with the area to be lubricated within the compressor, and the other end of which communicates with the oil sump. The first oil circuit control assembly also includes a second on-off switching component 302, which includes a second valve core 42. When the speed of the crankshaft 13 is lower than a first predetermined speed, the induced current generated in the first conductor 32 can drive the second valve core 42 to a cutoff position. When the speed of the crankshaft 13 is not lower than the first predetermined speed, the induced current generated in the first conductor 32 can drive the second valve core 42 to a connecting position. When the speed of the crankshaft 13 is lower than the first predetermined speed, the second valve core 42 is in the cutoff position, ensuring sufficient oil supply and lubrication of the oil supply pipe 21. When the speed of the crankshaft 13 is not lower than the first predetermined speed, the second valve core 42 is in the connecting position, allowing some of the large amount of lubricating oil pumped by the oil guide plate 132 to flow back to the oil sump below, preventing a large amount of oil and gas from being discharged from the compressor.

[0034] See Figure 4 As shown, the second on-off switching component 302 also includes a second valve body 43, which has a first oil return hole 46 corresponding to the pipe mouth of the first oil return pipe 41, and the second valve core 42 has a second iron core 421. A second coil 422 is wound around the second iron core 421, and the second coil 422 can form a circuit loop with the first conductor 32. The second valve body 43 is also provided with a second magnetic component 44 and a second elastic component 45, wherein the second magnetic component 44 is arranged opposite to the second iron core 421, and one end of the second elastic component 45 is connected to the second valve core 42 and is located opposite to the second iron core 421. In this way, when the induced current generated in the first conductor 32 is small or there is no induced current, under the action of the elastic force of the second elastic member 45, the second valve core 42 is in the cut-off state of cutting off the first oil return hole 46. At this time, the lubricating oil in the back pressure chamber does not need to be returned to the oil pool below, ensuring sufficient lubrication of the pump body assembly; when the induced current generated in the first conductor 32 is large enough, it will generate a large electromagnetic force at the second coil 422 and the second iron core 421. The electromagnetic force attracts the second magnetic member 44 and then enables the second valve core 42 to overcome the elastic force (pulling force) of the second elastic member 45 and switch from the position of cutting off the first oil return hole 46 to the position of connecting to the first oil return hole 46, until the second valve core 42 is in the connected state connecting to the first oil return hole 46.

[0035] In some embodiments, the first conductor 32, the first coil 3412, and the second coil 422 are connected in series in a first circuit, which can simplify the circuit connections within the compressor. To better match the switching between the cutoff and connection states of the first valve core 341 and the second valve core 42 with the rotational speed of the crankshaft 13, a first resistor 35 is connected in series in the first circuit.

[0036] The rotor of the gear oil pump 22 includes a third gear 221, which meshes with the second gear 33. This means that the first gear 133, the second gear 33, and the third gear 221 are all meshed, eliminating the need for intermediate transmission components and simplifying the rotational transmission chain. It should be noted that the gear oil pump 22 includes at least two meshing oil pumping gears, at least one of which is driven to rotate by the third gear 221, thereby achieving the purpose of pumping oil through the meshing of the two gears.

[0037] See also Figure 1 、 Figure 2 and Figure 5 As shown, the scroll compressor also includes a second oil return pipe 51. One end of the second oil return pipe 51 is connected to the back cavity (including the back pressure chamber 141) of the rotor 12, and the other end of the second oil return pipe 51 is connected to the oil sump. A second oil circuit control assembly is provided on the second oil return pipe 51. When the speed of the crankshaft 13 exceeds a second preset speed, the second oil circuit control assembly controls the second oil return pipe 51 to be open. When the speed of the crankshaft 13 is not higher than the second preset speed, the second oil circuit control assembly controls the second oil return pipe 51 to be cut off. The second preset speed is higher than the first preset speed. As the speed of the crankshaft 13 further increases, the centrifugal oil supply of the oil guide plate 132 will be further significantly increased, and a large amount of lubricating oil will be discharged into the air conditioning system along with the exhaust gas of the compressor. If the oil return volume of the oil sump is insufficient, the oil volume in the oil sump below will decrease, which will in turn lead to insufficient lubrication of the subsequent pump body components. In this technical solution, the second oil return pipe 51 is used to increase the oil return volume under this operating condition, effectively overcoming the aforementioned disadvantages.

[0038] Specifically, see Figure 5As shown, the second oil circuit control assembly includes a third on-off switching component 5, which includes a third valve body 52 and a third valve core 53. The third valve body 52 has a second oil return hole 57 corresponding to the pipe mouth of the second oil return pipe 51. The third valve core 53 has a third iron core 531. A third coil 532 is wound around the third iron core 531. The third coil 532 forms a circuit loop with the oil return power generation component. The third valve body 52 is also provided with a third magnetic member 54 and a third elastic member 55. The third magnetic member 54 is arranged opposite to the third iron core 531. One end of the third elastic member 55 is connected to the third valve core 53 and is opposite to the third iron core 531. When the rotation speed of the crankshaft 13 is not higher than the second preset speed, the third valve core 53 is in a state of cutting off the second oil return hole 57. When the rotation speed of the crankshaft 13 is higher than the second preset speed, the third valve core 53 is in a state of connecting to the second oil return hole 57. In this way, when the current in the third coil 532 is small or there is no current, under the action of the elastic force of the third elastic member 55, the third valve core 53 is in the cut-off state of cutting off the second oil return hole 57. At this time, the lubricating oil in the back pressure chamber 141 does not need to return to the oil pool below, ensuring sufficient lubrication of the pump body assembly; when the current in the third coil 532 is large enough, it will generate a large electromagnetic force at the third coil 532 and the third iron core 531. The electromagnetic force attracts the third magnetic member 54 and then enables the third valve core 53 to overcome the elastic force (pulling force) of the third elastic member 55 and switch from the position of cutting off the second oil return hole 57 to the position of connecting to the second oil return hole 57, until the third valve core 53 is in the connected state connecting to the second oil return hole 57.

[0039] In a specific embodiment, Figure 7 As shown, the oil return power generation component includes a transformer 6, a primary coil is wound on the primary side of the transformer 6, and a secondary coil is wound on the secondary side. The primary coil is connected in series with the first circuit, and the secondary coil is connected in series with the third coil 532. The number of turns of the primary coil is less than the number of turns of the secondary coil. This can simplify the internal structural design of the compressor. At the same time, by designing that the number of turns of the primary coil is less than the number of turns of the secondary coil, the same induced current in the first conductor 32 can be used to switch the position of different valve cores at different speeds.

[0040] See also Figure 5As shown, as another specific implementation of the oil return power generation component, the oil return power generation component includes a second permanent magnet rotor 71 and a second conductor 72 passing through the central through hole of the second permanent magnet rotor 71. The second permanent magnet rotor 71 is sheathed with a fourth gear 73, and the fourth gear 73 is engaged with the first gear 133. When the rotation speed of the crankshaft 13 is higher than the second preset rotation speed, the induced current generated in the second conductor 72 can drive the third valve core 53 to be in a state of cutting off the second oil return hole 57. When the rotation speed of the crankshaft 13 is higher than the second preset rotation speed, the induced current generated in the second conductor 72 can drive the third valve core 53 to be in a state of connecting to the second oil return hole 57. The principle of generating induced current in the second conductor 72 is the same as the principle of generating induced current in the aforementioned first conductor 32, and will not be repeated here.

[0041] In a preferred embodiment, the third coil 532 is connected in series with a second resistor 56. When the first resistor 35 is connected in series with the first circuit, the resistance of the second resistor 56 is greater than that of the first resistor 35. This allows the magnitude of the induced current in the corresponding circuit to be adjusted by adjusting the resistance of the first and second resistors 35, 56, thereby controlling the position switching of the corresponding valve core and adapting it to the rotational speed of the crankshaft 13. It should be noted that by defining the relationship between the resistance values ​​of the first and second resistors 35, 56, the timing of oil return from the first oil return pipe 41 can be earlier than that of the second oil return pipe 51. Specifically, when the crankshaft 13 rotates at a high speed, oil return from the first oil return pipe 41 is ensured first, and oil return from the second oil return pipe 51 is enabled after the speed further increases.

[0042] The aforementioned first elastic member 344, the second elastic member 45 and the third elastic member 55 can all be implemented by springs; the aforementioned first magnetic member 343, the second magnetic member 44 and the third magnetic member 54 can all be implemented by cast iron fixedly connected to the corresponding valve body, and the aforementioned first valve core 341, the second valve core 42 and the third valve core 53 can specifically be baffles.

[0043] According to an embodiment of the present invention, there is further provided an air conditioner comprising the scroll compressor described above.

[0044] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A scroll compressor, comprising a stator (11), a rotor (12), a crankshaft (13) for driving the rotor (12) to move, and an upper bracket (14), wherein a central oil passage (131) extending along its axial direction is constructed in the crankshaft (13), and an oil guide plate (132) is provided at one end of the central oil passage (131) away from the rotor (12), characterized in that: The scroll compressor further comprises an oil supply pipe (21), one end of the oil supply pipe (21) being in communication with a lubricated area in the compressor, the other end of the oil supply pipe (21) being provided with a gear oil pump (22), and a first oil circuit control component being provided on the oil supply pipe (21), wherein when the rotation speed of the crankshaft (13) is lower than a first preset rotation speed, the first oil circuit control component controls the oil supply pipe (21) to be conducted, and when the rotation speed of the crankshaft (13) is not lower than the first preset rotation speed, the first oil circuit control component controls the oil supply pipe (21) to be cut off; the first oil circuit control component comprises an oil supply power generation component, the oil supply power generation component comprising a first permanent magnet rotor (31) and a first conductor (32) passing through a central through hole of the first permanent magnet rotor (31). ), the crankshaft (13) is sheathed with a first gear (133), the first permanent magnet rotor (31) is sheathed with a second gear (33), the first gear (133) is meshed with the second gear (33), the first oil circuit control component further comprises a first on-off switching component (301), the first on-off switching component (301) comprises a first valve core (341), when the rotation speed of the crankshaft (13) is lower than the first preset rotation speed, the induced current generated in the first conductor (32) can drive the first valve core (341) to be in a connected position, and when the rotation speed of the crankshaft (13) is not lower than the first preset rotation speed, the induced current generated in the first conductor (32) can drive the first valve core (341) to be in a cut-off position.

2. The scroll compressor according to claim 1, wherein: A back pressure cavity (141) for generating back pressure on the moving disc (12) is constructed on the upper bracket (14), and the area to be lubricated in the compressor includes the back pressure cavity (141).

3. The scroll compressor according to claim 2, wherein: The first on-off switching component (301) further includes a first valve body (342), the first valve body (342) having a first oil supply hole (345) corresponding to the pipe mouth of the oil supply pipe (21), the first valve core (341) having a first iron core (3411), the first iron core (3411) being wound with a first coil (3412), the first coil (3412) being capable of forming a circuit loop with the first conductor (32), the first valve body (342) further being provided with a first magnetic member (343) and a first elastic member (344), wherein the first magnetic member (343) is arranged opposite to the first iron core (3411), and one end of the first elastic member (344) is connected to the first valve core (341) and is located opposite to the first iron core (3411).

4. The scroll compressor according to claim 3, wherein: The first oil return pipe (41) is further provided. One end of the first oil return pipe (41) is communicated with the area to be lubricated in the compressor, and the other end of the first oil return pipe (41) is communicated with the oil pool. The first oil circuit control component further includes a second on-off switching component (302). The second on-off switching component (302) includes a second valve core (42). When the rotation speed of the crankshaft (13) is lower than the first preset rotation speed, the induced current generated in the first conductor (32) can drive the second valve core (42) to be in the cut-off position. When the rotation speed of the crankshaft (13) is not lower than the first preset rotation speed, the induced current generated in the first conductor (32) can drive the second valve core (42) to be in the connected position.

5. The scroll compressor according to claim 4, wherein: The second on-off switching component (302) further includes a second valve body (43), the second valve body (43) having a first oil return hole (46) corresponding to the pipe mouth of the first oil return pipe (41), the second valve core (42) having a second iron core (421), the second iron core (421) having a second coil (422) wound thereon, the second coil (422) being capable of forming a circuit loop with the first conductor (32), the second valve body (43) further being provided with a second magnetic member (44) and a second elastic member (45), wherein the second magnetic member (44) is arranged opposite to the second iron core (421), and one end of the second elastic member (45) is connected to the second valve core (42) and is located opposite to the second iron core (421).

6. The scroll compressor according to claim 5, characterized in that The first conductor (32), the first coil (3412) and the second coil (422) are connected in series on a first circuit.

7. The scroll compressor according to claim 6, characterized in that A first resistor (35) is connected in series with the first circuit.

8. The scroll compressor according to claim 2, wherein: The rotor of the gear oil pump (22) is provided with a third gear (221), and the third gear (221) is meshed with the second gear (33).

9. The scroll compressor according to any one of claims 6 to 7, characterized in that: The invention also includes a second oil return pipe (51), one end of which is in communication with the back cavity of the movable plate (12), and the other end of which is in communication with the oil pool. A second oil circuit control component is provided on the second oil return pipe (51). When the rotation speed of the crankshaft (13) is higher than a second preset rotation speed, the second oil circuit control component controls the second oil return pipe (51) to be connected. When the rotation speed of the crankshaft (13) is not higher than the second preset rotation speed, the second oil circuit control component controls the second oil return pipe (51) to be cut off. The second preset rotation speed is higher than the first preset rotation speed.

10. The scroll compressor according to claim 9, wherein: The second oil circuit control assembly includes a third on-off switching component (5), the third on-off switching component (5) includes a third valve body (52) and a third valve core (53), the third valve body (52) has a second oil return hole (57) corresponding to the pipe mouth of the second oil return pipe (51), the third valve core (53) has a third iron core (531), a third coil (532) is wound around the third iron core (531), the third coil (532) and the oil return power generation component form a circuit loop, and the third valve body (52) is also provided with a third magnetic element (531). 4) and a third elastic member (55), wherein the third magnetic member (54) is arranged opposite to the third iron core (531), one end of the third elastic member (55) is connected to the third valve core (53) and is opposite to the third iron core (531), when the rotation speed of the crankshaft (13) is not higher than the second preset rotation speed, the third valve core (53) is in a state of cutting off the second oil return hole (57), and when the rotation speed of the crankshaft (13) is higher than the second preset rotation speed, the third valve core (53) is in a state of connecting to the second oil return hole (57).

11. The scroll compressor according to claim 10, wherein: The oil return power generation component includes a transformer (6), a primary coil is wound on the primary side of the transformer (6), and a secondary coil is wound on the secondary side. The primary coil is connected in series with the first circuit, and the secondary coil is connected in series with the third coil (532). The number of turns of the primary coil is less than the number of turns of the secondary coil.

12. The scroll compressor according to claim 10, wherein: The oil return power generation component comprises a second permanent magnet rotor (71) and a second conductor (72) passing through a central through hole of the second permanent magnet rotor (71); a fourth gear (73) is sheathed on the outer surface of the second permanent magnet rotor (71); the fourth gear (73) is engaged with the first gear (133); when the rotation speed of the crankshaft (13) is higher than the second preset rotation speed, the induced current generated in the second conductor (72) can drive the third valve core (53) to be in a state of cutting off the second oil return hole (57); when the rotation speed of the crankshaft (13) is higher than the second preset rotation speed, the induced current generated in the second conductor (72) can drive the third valve core (53) to be in a state of connecting to the second oil return hole (57).

13. The scroll compressor according to claim 11 or 12, characterized in that: The third coil (532) is connected in series with a second resistor (56); when the first circuit is connected in series with a first resistor (35), the resistance of the second resistor (56) is greater than the resistance of the first resistor (35).

14. An air conditioner, characterized in that: The scroll compressor comprises the scroll compressor according to any one of claims 1 to 13.

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