Scroll compressor

Abstract

The present application provides a kind of scroll compressor, can solve the technical problem that the scroll compressor in prior art under different working conditions, the axial force received by orbiting plate cannot be effectively adjusted, leading to the refrigerant leakage or wear increase between orbiting plate and static plate;A kind of scroll compressor, including static plate and orbiting plate, bracket and crankshaft that cooperate with each other;Back pressure cavity is formed between orbiting plate and bracket, compression chamber is formed between orbiting plate and static plate, fluid passage is arranged between compression chamber and back pressure cavity, electromagnetic assembly is arranged in fluid passage;Scroll compressor is also provided with magnetic steel and induction stator, induction stator can be driven by crankshaft relative to magnetic steel and generate current, induction stator is connected with electromagnetic assembly by power line;Electromagnetic assembly includes moving block, the moving distance of moving block is positively correlated with the current size received by electromagnetic assembly, the flow area of fluid passage is positively correlated with the moving distance of moving block.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a scroll compressor. Background Technology

[0002] A scroll compressor has a crescent-shaped compression chamber formed between its moving and stationary discs. During operation, the stationary disc remains stationary, while the crankshaft drives the moving disc to revolve around a certain radius. This revolution causes a periodic change in the volume of the compression chamber, compressing the gas entering the chamber. Gas reaching the set pressure is then discharged through the exhaust port on the stationary disc. Scroll compressors often need to meet different external demands, meaning they operate under varying conditions. Higher operating conditions require higher crankshaft speeds. Theoretically, the output pressure of a scroll compressor is independent of crankshaft speed; however, in practice, considering leakage, exhaust resistance, and pulsation, higher crankshaft speeds lead to a certain increase in gas pressure within the compression chamber. When the moving disc experiences a large downward force, the axial clearance between the moving and stationary discs increases, leading to increased leakage. Conversely, when the moving disc experiences a large upward force, the axial friction between them increases, increasing friction and the generation of dust, which can eventually reduce the compression volume. Furthermore, due to the limited vertical movement of the moving disc, increased friction can result in irreparable clearances.

[0003] To address this technical problem, the prior art, patent CN115949584A, discloses an inductive current control oil circuit structure. This patent adds gears and permanent magnets to achieve switching control of different oil circuits. However, this structure requires more parts, making it more complex. Furthermore, the method of generating the inductive current is unstable, the method of fixing the parts is not specified, resulting in low practical feasibility. The wiring arrangement is arbitrary and complex, reducing the overall reliability of the machine. Additionally, the oil circuit control has weak adjustment of the axial force on the moving plate.

[0004] Patent CN110185616B discloses an electromagnetic mechanism for balancing axial forces. This patent adds electromagnetic mechanisms to the moving and stationary discs to achieve electromagnetic air gap optimization. However, this structure is relatively bulky, which is not conducive to the current trend of miniaturization of the entire machine. It also requires a large number of wires and corresponding sensors, making installation very complex and costly. Furthermore, adjusting the axial force of the moving disc using electromagnetic force is less effective in practical applications because the moving disc is in motion and the electromagnetic effect is affected by temperature.

[0005] Patent CN111365226A discloses a controlled magnet moving disk displacement structure. This patent uses a controlled magnet and a control magnet to achieve a moving disk assembly in a predetermined posture. However, this structure adds multiple sets of parts, making the parts more complex and increasing the size of the moving and stationary disks. The overall size of the machine needs to be increased accordingly, which is not conducive to miniaturization and increases costs. Moreover, the axial force of the moving disk controlled by electromagnetic force in this patent is also affected by temperature and the movement of the moving disk, making the axial force unstable and resulting in poor actual performance.

[0006] Another existing technology connects the compression chamber and the back pressure chamber through a channel, allowing the gas in the back pressure chamber to communicate with the gas in the compression chamber, thereby making the pressure in the back pressure chamber match the pressure in the compression chamber. However, in this scheme, the flow area of ​​the channel is not adjustable, which results in excessively high pressure in the back pressure chamber when the moving disc speed is low, increasing the friction between the moving disc and the stationary disc. When the moving disc speed is high, the damping effect of the channel on the gas results in lower pressure in the back pressure chamber, a larger gap between the moving disc and the stationary disc, and increased leakage. Summary of the Invention

[0007] Therefore, the present invention provides a scroll compressor that can solve the technical problem in the prior art where the axial force on the moving plate of the scroll compressor cannot be effectively adjusted under different operating conditions, resulting in refrigerant leakage or increased wear between the moving plate and the stationary plate.

[0008] To address the aforementioned problems, the present invention provides a scroll compressor, comprising a stationary disc and a moving disc, a support, and a crankshaft that cooperate with each other; a back pressure cavity is formed between the moving disc and the support, and a compression cavity is formed between the moving disc and the stationary disc, characterized in that a fluid passage is provided between the compression cavity and the back pressure cavity, and an electromagnetic component is provided within the fluid passage;

[0009] The scroll compressor is also equipped with a magnet and an induction stator. The induction stator can rotate relative to the magnet and generate current under the drive of the crankshaft. The induction stator is connected to the electromagnetic component via a power line.

[0010] The electromagnetic component includes a movable block, the moving distance of which is positively correlated with the magnitude of the current received by the electromagnetic component, and the flow area of ​​the fluid passage is positively correlated with the moving distance of the movable block.

[0011] In some embodiments, a sliding cavity is provided within the fluid passage, the sliding cavity including an inner sidewall; the fluid passage includes a first through hole provided on the inner sidewall.

[0012] The electromagnetic component is disposed within the sliding cavity, and the moving block includes an outer wall. The movement of the moving block along a direction away from or towards the moving disk can change the opening of the first through hole through the outer wall.

[0013] In some embodiments, the electromagnetic component further includes a first coil and an elastic element, the induction stator being connected to the first coil via a power line; the first coil being energized can drive the moving block to move, and the movement of the moving block can cause the elastic element to deform.

[0014] In some embodiments, the movable block includes a first end face perpendicular to the direction of movement of the movable block, the first end face being provided with a groove, and a portion of the elastic member being disposed within the groove.

[0015] In some embodiments, the electromagnetic component includes a housing disposed within the sliding cavity, the outer surface of the housing being sealed to the inner surface of the sliding cavity, and a connection hole provided on the housing, the connection hole communicating with the first through hole;

[0016] The movable block, the first coil, and the elastic element are all disposed within the housing.

[0017] In some embodiments, the housing includes a base and a cover disposed on the base; the elastic element is a spring, one end of the spring is connected to the groove, and the other end of the spring is connected to the base; the first coil is disposed inside the spring.

[0018] In some embodiments, the spring is a helical spring, and the helical spring and the first coil constitute the same elastic coil.

[0019] In some embodiments, the base has a wiring terminal on the side facing away from the groove.

[0020] In some embodiments, the scroll compressor further includes a crank pin and an eccentric sleeve, a first slot is provided at one end of the crankshaft facing the eccentric sleeve, the first end of the crank pin facing the crankshaft is inserted into the first slot, and the sliding cavity is provided on the crank pin;

[0021] The crankshaft is provided with a first wire passage, and the crank pin is provided with a second wire passage. One end of the second wire passage is connected to the housing, and the other end is connected to the first wire passage. The crankshaft is provided with a power source, and the first wire passage leads to the induction stator or magnet.

[0022] In some embodiments, the sliding cavity includes a second end face opposite to the groove, one end of the second wire passage connected to the housing is located on the second end face of the sliding cavity, the base is abutted against the second end face, and the terminal is inserted downward into the second wire passage.

[0023] In some embodiments, the moving disk includes a chassis and a scroll gear;

[0024] The eccentric sleeve is disposed between the crankshaft and the chassis, and the eccentric sleeve is connected to the moving disc; the eccentric sleeve is provided with a second slot facing the crankshaft, and the second end of the crank pin is inserted into the second slot;

[0025] The fluid passage includes a second through hole on the chassis, a third through hole on the eccentric sleeve, and a fourth through hole on the housing cover; the first through hole is located on the crank pin;

[0026] The movement of the movable block toward the moving plate can block the fourth through hole.

[0027] In some embodiments, the sidewall of the second slot is provided with a first groove, and the end face of the eccentric sleeve facing the crankshaft is provided with a second groove. One end of the first groove is connected to the connecting hole, and the other end is connected to the second groove; the second groove leads to the back pressure cavity.

[0028] In some embodiments, the fluid channel further includes a first annular groove disposed on the inner wall of the second slot and surrounding the crank pin, the first annular groove communicating with both the connecting hole and the first groove.

[0029] In some embodiments, the magnet is mounted on the bracket, and the induction stator is mounted on the crankshaft; the induction stator is connected to the terminal block via a power line; the power line is laid within the first conductor path and the second conductor path.

[0030] In some embodiments, a winding portion is provided on the crankshaft, and a third coil is wound on the winding portion, the third coil being wound along the axial direction of the crankshaft; the induction stator includes the third coil.

[0031] In some embodiments, the side of the stationary disc away from the moving disc is a high-pressure zone, and the high-pressure zone can communicate with the compression zone;

[0032] The fluid passage includes a first passage disposed on the stationary plate and a second passage disposed on the support; the first end of the first passage leads to the high pressure zone, the second end of the first passage is connected to the second passage, the first end of the second passage is connected to the second end of the first passage, and the second end of the second passage leads to the back pressure chamber.

[0033] The second passage includes the first through hole, and the sliding cavity is disposed on the second passage.

[0034] In some embodiments, a third annular groove is provided on the inner wall surface of the sliding cavity, surrounding the housing, and the third annular groove is in communication with both the connecting hole and the first through hole.

[0035] In some embodiments, the induction stator is disposed on the bracket, and the magnet is disposed on the crankshaft.

[0036] In some embodiments, the scroll compressor further includes a housing and a rear cover, with a receiving cavity formed between the housing and the rear cover;

[0037] The crankshaft extends out of the housing and into the receiving cavity at one end away from the moving disc; the portion of the crankshaft extending out of the housing is the protrusion, the magnet is disposed on the protrusion, and the induction stator is disposed on the rear cover.

[0038] In some embodiments, a motor is disposed between the bracket and the receiving cavity, a spacer cavity is formed between the motor and the bracket, and the wiring terminals of the electromagnetic component are located within the spacer cavity;

[0039] The outer shell has a first groove extending radially along the side facing the rear cover, a second groove penetrating the outer shell, and a third groove extending axially along the inner side of the outer shell; the first groove, the second groove, and the third groove are connected end to end in sequence, and the third groove leads to the spacer cavity.

[0040] In some embodiments, the scroll compressor includes a housing and a rear cover, with a receiving cavity formed between the housing and the rear cover;

[0041] The crankshaft extends out of the housing and into the receiving cavity at one end away from the moving disc; the part of the crankshaft extending out of the housing is the protrusion, the induction stator is disposed on the protrusion, the magnet is disposed on the rear cover, and the first wire passage leads to the receiving cavity.

[0042] In some embodiments, the induction stator includes an iron core and a second coil disposed on the iron core; the iron core is disc-shaped and perpendicular to the crankshaft axis; the iron core is provided with a shaft hole, the iron core is sleeved on the crankshaft through the shaft hole, a gap is formed between the inner circular surface of the shaft hole and the outer circular surface of the crankshaft, and the second coil is wound on the iron core along the radial direction of the iron core;

[0043] The magnet includes a first permanent magnet fixed on the crankshaft and located on one axial side of the iron core.

[0044] In some embodiments, the iron core is provided with vent holes, which penetrate both ends of the iron core along its axial direction.

[0045] In some embodiments, a fixing plate is fixedly disposed on the crankshaft, the fixing plate being disc-shaped and perpendicular to the axis of the crankshaft;

[0046] The fixing plate has a snap-fit ​​part with an opening facing the tangential direction of the fixing plate. The snap-fit ​​part is fan-shaped. The snap-fit ​​part has a first slot. The first permanent magnet can be snapped into the first slot through the opening of the snap-fit ​​part. The shape of the first permanent magnet matches that of the snap-fit ​​part.

[0047] In some embodiments, a stop is provided at the opening of the snap-fit ​​portion, and a second slot is formed between the stop and the snap-fit ​​portion;

[0048] The snap-fit ​​part further includes a baffle that snaps into the second slot. When the baffle is snapped into the second slot, the baffle can block the opening of the snap-fit ​​part.

[0049] This invention establishes a fluid passage between the back pressure chamber and the compression chamber, and installs an electromagnetic component within the fluid passage. The electromagnetic component controls the opening of the fluid passage, which is positively correlated with the rotational speed of the moving disc. This ensures that the pressure in the back pressure chamber and the pressure in the compression chamber are balanced, thereby balancing the forces and torques on the moving disc in the axial direction. This prevents large gaps between the moving disc and the stationary disc, avoids excessive friction between them, and ultimately improves the working performance of the scroll compressor. Attached Figure Description

[0050] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0051] Figure 1A cross-sectional view of the electromagnetic component on the crank pin according to an embodiment of the present invention;

[0052] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view at point B in the middle;

[0053] Figure 3 This is an embodiment of the present invention. Figure 1 Sectional view along line AA;

[0054] Figure 4 This is a cross-sectional view of the electromagnetic component according to an embodiment of the present invention;

[0055] Figure 5 This is a cross-sectional view of the crank pin according to an embodiment of the present invention;

[0056] Figure 6 This is a partial sectional view of the eccentric sleeve in an embodiment of the present invention;

[0057] Figure 7 This is a cross-sectional view of the electromagnetic component mounted on the support according to an embodiment of the present invention;

[0058] Figure 8 This is a schematic diagram of an embodiment of the present invention with the crankshaft extending out of the compressor housing and the electromagnetic assembly mounted on the crank pin.

[0059] Figure 9 This is a schematic diagram of an embodiment of the present invention with the crankshaft extending out of the compressor housing and the electromagnetic components mounted on the bracket;

[0060] Figure 10 This is a schematic diagram of the induction stator plate shape in an embodiment of the present invention;

[0061] Figure 11 This is an embodiment of the present invention. Figure 10 Enlarged view at point C;

[0062] Figure 12 This is a radial cross-sectional view of the induction stator plate in an embodiment of the present invention;

[0063] Figure 13 This is a schematic diagram of the first permanent magnet, baffle, and fixing plate in an embodiment of the present invention;

[0064] Figure 14 This is an embodiment of the present invention. Figure 13 Enlarged view at point D;

[0065] Figure 15 This is a cross-sectional view of the baffle being inserted into the second slot according to an embodiment of the present invention;

[0066] The reference numerals in the attached figures are as follows:

[0067] 101. Bracket; 102. Stationary plate; 103. Moving plate; 1031. Chassis; 1032. Scroll gear; 104. Back pressure chamber; 105. Compression chamber; 201. First groove; 202. Second groove; 203. Third groove; 301. First passage; 302. Second passage; 303. Outer shell; 304. Rear cover; 305. Receiving cavity; 306. Spacing cavity; 307. Iron core; 3071. Vent hole; 308. Shaft hole; 309. Fixing plate; 3093. Snap-fit ​​part; 3091. First slot; 3092. Second slot; 3094. Baffle; 4. Crankshaft; 403. Crank pin; 404. Eccentric sleeve; 401. First wire passage; 402. Second Wire path; 405, first groove; 406, second groove; 5, electromagnetic component; 501, moving block; 502, sliding cavity; 503, spring; 5011, first end face; 5021, second end face; 5012, groove; 504, housing; 5041, connecting hole; 5042, base; 5043, housing cover; 5044, terminal block; 601, first through hole; 602, second through hole; 603, third through hole; 604, fourth through hole; 701, first coil; 702, second coil; 703, third coil; 801, first annular groove; 802, second annular groove; 803, third annular groove; 9021, first permanent magnet; 9022, second permanent magnet. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0070] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0071] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of illustrative purposes and to facilitate understanding and reading by those skilled in the art, and are not intended to limit the conditions under which the invention can be implemented. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed in the invention. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0072] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0073] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0074] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0075] This invention provides a scroll compressor that solves the technical problem in the prior art where the axial force on the moving disc of a scroll compressor cannot be effectively adjusted under different operating conditions, leading to refrigerant leakage or increased wear between the moving and stationary discs.

[0076] This invention provides a scroll compressor, such as Figure 1-15 As shown, it includes a stationary disk 102 and a moving disk 103 that cooperate with each other, a support 101 and a crankshaft 4; a back pressure cavity 104 is formed between the moving disk 103 and the support 101, and a compression cavity 105 is formed between the moving disk 103 and the stationary disk 102. The feature is that a fluid passage is provided between the compression cavity 105 and the back pressure cavity 104, and an electromagnetic component 5 is provided in the fluid passage.

[0077] The scroll compressor is also equipped with a magnet and an induction stator. The induction stator can rotate relative to the magnet and generate current under the drive of the crankshaft 4. The induction stator is connected to the electromagnetic component 5 via a power line.

[0078] The electromagnetic component 5 includes a movable block 501. The moving distance of the movable block 501 is positively correlated with the magnitude of the current received by the electromagnetic component 5, and the flow area of ​​the fluid passage is positively correlated with the moving distance of the movable block 501.

[0079] To better explain the present invention, we will take a vertical scroll compressor with the stationary disc 102 on top and the moving disc 103 on the bottom as an example.

[0080] The power supply is configured as an induction stator and magnet, which enables the output voltage of the power supply to increase as the crankshaft 4 speed increases, thereby making the moving distance of the moving parts positively correlated with the speed of the crankshaft 4.

[0081] The faster the crankshaft 4 rotates, the faster the induction stator moves relative to the magnet, the larger the induced current generated by the induction stator, and the larger the current received by the electromagnetic component 5. The movement distance of the moving block 501 increases with the increase of the received current, and decreases with the decrease of the received current. The larger the movement distance of the moving block 501, the larger the flow area of ​​the fluid passage, and the smaller the movement distance of the moving block 501, the smaller the flow area of ​​the fluid passage.

[0082] When the scroll compressor operates, the high-pressure refrigerant in the compression chamber 105 exerts a downward force on the moving plate 103. Some of the high-pressure refrigerant enters the back pressure chamber 104 through the fluid passage. The high-pressure refrigerant entering the back pressure chamber 104 exerts an upward force on the moving plate 103. The refrigerant on the upper and lower sides of the moving plate 103 maintains a basic balance of forces in the axial direction (vertical direction). When the moving plate 103 rotates at a higher speed, the pressure in the compression chamber 105 increases, the magnetic field strength generated by the electromagnetic component 5 increases, the movement distance of the moving block 501 increases, the flow area of ​​the fluid passage increases, and the pressure in the back pressure chamber 104 also increases accordingly. When the moving plate 103 rotates at a lower speed, the pressure in the compression chamber 105 decreases, the magnetic field strength generated by the electromagnetic component 5 decreases, the movement distance of the moving block 501 decreases, the flow area of ​​the fluid passage decreases, and the pressure in the back pressure chamber 104 decreases. This maintains a basic balance of forces on the upper and lower sides of the moving plate 103, thereby reducing friction and clearance between the moving plate 103 and the stationary plate 102.

[0083] The fluid channel has a damping effect on the gas, and the pressure in the back pressure chamber 104 is less than the pressure in the compression chamber 105. Due to the presence of the volutes on the moving plate 103, the area of ​​the gas in the back pressure chamber 104 acting on the moving plate 103 is greater than the area of ​​the gas in the compression chamber 105 acting on the moving plate 103. Pressure equals pressure multiplied by area. The area of ​​the moving plate 103 is basically fixed during production. When the flow area of ​​the fluid channel is fixed, due to the damping effect of the fluid channel on the gas and the leakage of the back pressure chamber 104, when the pressure in the compression chamber 105 changes, the pressure of the gas in the compression chamber 105 acting on the moving plate 103 cannot be balanced with the pressure of the gas in the compression chamber 105 acting on the moving plate 103.

[0084] The reason why the pressure in the back pressure chamber 104 decreases from high is that the back pressure chamber 104 is not an absolutely sealed cavity. The gas inside the back pressure chamber 104 will slowly leak outwards, and the leakage channels include the gap between the crankshaft 4 and the bracket 101. Because the leakage gap is small, the pressure inside the back pressure chamber 104 will gradually decrease when there is no external gas injection. At this time, the flow area between the compression chamber 105 and the back pressure chamber 104 decreases, the damping of the gas channel on the gas increases, and the flow velocity of the fluid entering the back pressure chamber 104 also decreases accordingly. This allows the pressure in the back pressure chamber 104 to decrease more quickly, making the vertical action on the moving plate 103 more balanced. Similarly, the reason why the pressure in the back pressure chamber 104 increases from low is that the fluid channel area increases, the damping of the gas channel on the gas decreases, and the velocity of the gas entering the back pressure chamber 104 increases. Since the flow rate of the gas leaking outwards from the back pressure chamber 104 changes little, the pressure in the back pressure chamber 104 increases.

[0085] The compression chamber 105 of the scroll compressor is a multi-crescent-shaped space formed between the moving plate 103 and the stationary plate 102.

[0086] By adjusting the pressure inside the back pressure chamber 104, the unbalanced axial force and torque caused by the gas in each crescent-shaped space on the moving plate 103 are balanced, thereby realizing the dynamic adjustment of the back pressure of the moving plate 103 and effectively improving the performance and reliability of the scroll compressor.

[0087] The moving part can be metal iron or a magnetic part; when the moving part is a magnetic part, the direction of the magnetic field generated by the electromagnetic component 5 is opposite to or the same as the direction of the magnetic field generated by the magnetic part.

[0088] Preferred, such as Figure 5 As shown, a sliding cavity 502 is provided in the fluid passage, and the sliding cavity 502 includes an inner sidewall; the fluid passage includes a first through hole 601 provided on the inner sidewall;

[0089] The electromagnetic component 5 is disposed in the sliding cavity 502. The moving block 501 includes an outer wall. The moving block 501 can change the opening degree of the first through hole 601 by moving in a direction away from or close to the moving disk 103 through the outer wall.

[0090] The sliding cavity 502 forms part of the fluid passage; by sliding the moving block 501, the outer wall of the moving block 501 slides relative to the inner wall of the sliding cavity 502, thereby changing the opening of the first through hole 601 and adjusting the flow area of ​​the fluid passage; this method is relatively simple and easy to control. The minimum opening of the first through hole 601 is zero, that is, the moving part completely blocks the first through hole 601.

[0091] When the compressor is used in the refrigeration system, the flow area of ​​the refrigerant containing lubricating oil changes abruptly when it passes through the intersection of the first through hole 601 and the moving block 501, and the flow speed increases. Due to inertia, the lubricating oil in the refrigerant separates from the refrigerant and is adsorbed on the wall of the fluid channel, thus separating the lubricating oil and the refrigerant.

[0092] Preferably, the electromagnetic component 5 further includes a first coil 701 and an elastic element, and the induction stator is connected to the first coil 701 via a power line; when the first coil 701 is energized, it can drive the moving block 501 to move, and the movement of the moving block 501 can cause the elastic element to deform.

[0093] The faster the rotating disk 103 rotates, the greater the current generated by the induction stator, the stronger the magnetic field generated by the first coil 701, and the greater the magnetic attraction of the magnetic field on the moving part. This allows the moving part to overcome the elastic force of the elastic element (causing the elastic element to store elastic potential energy) and move a greater distance, thus increasing the opening of the first through hole 601. Conversely, the slower the rotating disk 103 rotates, the smaller the current generated by the induction stator, the weaker the magnetic field generated by the first coil 701, and the weaker the magnetic attraction of the magnetic field on the moving part. In this case, the force exerted by the elastic potential energy previously stored in the elastic element on the moving part is greater than the magnetic attraction force on the moving part, resulting in a smaller movement distance of the moving part under the influence of the elastic element, thus decreasing the opening of the first through hole 601. The direction of movement when the moving part moves a greater distance is opposite to the direction of movement when the moving part moves a smaller distance.

[0094] Preferred, such as Figure 2 and Figure 4 As shown, the moving block 501 includes a first end face 5011 perpendicular to the direction of movement of the moving block 501, and the first end face 5011 is provided with a groove 5012, and part of the elastic member is disposed in the groove 5012.

[0095] The elastic element is set in the groove 5012, which can reduce the size of the groove 5012 in the direction of movement of the moving block 501 and make full use of the internal space perpendicular to the direction of movement of the moving block 501, thereby reducing the size of the sliding cavity 502 and effectively ensuring the strength of the solid structure in which the sliding cavity 502 is set.

[0096] The sliding cavity 502 can be configured as a cylindrical cavity, and the moving block 501 is correspondingly configured as a cylinder with an inner cavity and an open end. The moving block 501 slides in a sealed manner within the sliding cavity 502.

[0097] Preferred, such as Figure 4As shown, the electromagnetic component 5 includes a housing 504, which is disposed in the sliding cavity 502. The outer surface of the housing 504 is sealed to the inner surface of the sliding cavity 502. The housing 504 is provided with a connecting hole 5041, which communicates with the first through hole 601.

[0098] The movable block 501, the first coil 701, and the elastic element are all disposed within the housing 504.

[0099] The movable block 501, the first coil 701, and the elastic element are all housed within the housing 504, making the electromagnetic assembly 5 modular. When maintenance or replacement of the electromagnetic assembly 5 is required, the housing 504 can be removed from the sliding cavity 502, facilitating maintenance and replacement of the electromagnetic assembly 5. The outer surface of the housing 504 is sealed to the inner surface of the sliding cavity 502 to prevent gas leakage between the outer surface of the housing 504 and the inner surface of the sliding cavity 502; a connection hole 5041 is provided to facilitate gas flow.

[0100] A sealing groove is provided between the housing 504 and the sliding cavity 502, and an energy storage sealing ring is provided in the sealing groove to prevent gas from entering between the housing 504 and the sliding cavity 502; a sealing ring is provided between the eccentric sleeve 404 and the crank pin 403 to prevent gas from leaking between the eccentric sleeve 404 and the crank pin 403.

[0101] Preferred, such as Figure 4 As shown, the housing 504 includes a base 5042 and a cover 5043 disposed on the base 5042; the elastic element is a spring 503, one end of the spring 503 is connected to the groove 5012, and the other end of the spring 503 is connected to the base 5042; the first coil 701 is disposed inside the spring 503.

[0102] The elastic element is set as spring 503, and the first coil 701 is placed inside spring 503 by utilizing the internal space of spring 503. This effectively utilizes the internal space of housing 504, further reducing the volume of housing 504 and facilitating the miniaturization of the compressor. Housing 504 is divided into housing cover 5043 and base 5042, which facilitates production and allows spring 503 and first coil 701 to be placed in groove 5012.

[0103] In another embodiment of the first coil 701 and the helical spring 503, the spring 503 is a helical spring 503, and the helical spring 503 and the first coil 701 constitute the same elastic coil.

[0104] By combining the spring 503 and the first coil 701 into one component, the number of parts is reduced, the space occupied is reduced, and the maintenance is easier. When the helical spring 503 is energized, the helical spring 503 generates a magnetic field that attracts the moving part. As the moving part moves, it exerts a compressive force on the helical spring 503, causing the helical spring 503 to deform and store elastic potential energy.

[0105] Preferred, such as Figure 2 and Figure 4 As shown, the base 5042 has a wiring terminal 5044 on the side facing away from the groove 5012.

[0106] By providing a wiring terminal 5044 on the side of the base 5042 facing away from the groove 5012, it is convenient for an external power source to charge the first coil 701 through the wiring terminal 5044.

[0107] Preferred, such as Figure 1 and Figure 2 As shown, the scroll compressor also includes a crank pin 403 and an eccentric sleeve 404. A first slot is provided at one end of the crankshaft 4 facing the eccentric sleeve 404. The first end of the crank pin 403 facing the crankshaft 4 is inserted into the first slot. The sliding cavity 502 is provided on the crank pin 403.

[0108] The crankshaft 4 is provided with a first wire passage 401, and the crank pin 403 is provided with a second wire passage 402. One end of the second wire passage 402 is connected to the housing 504, and the other end is connected to the first wire passage 401. The crankshaft 4 is provided with a power source, and the first wire passage 401 leads to the induction stator or the magnet.

[0109] The fit between the crankshaft 4 and the crank pin 403 is existing technology. The sliding cavity 502 is placed on the existing crank pin 403, reducing the occupancy of other structures. Because the crank pin 403 has a relatively simple structure, it is easy to set the sliding cavity 502 on it. The first wire passage 401 and the second wire passage 402 facilitate the connection of the power supply to the electromagnetic component 5. Since the first wire passage 401 is located on the crankshaft 4 and the second wire passage 402 is located on the crank pin 403, when the electromagnetic component 5 (first coil 701) is connected to the power supply, the power cord rotates synchronously with the crankshaft 4, avoiding tangling and improving safety. Here, the power supply refers to a structure capable of providing continuous current and voltage. A seal is provided between the crank pin 403 and the eccentric sleeve 404.

[0110] The sliding cavity 502 is located at the end of the crank pin 403 near the eccentric sleeve 404, which facilitates machining and allows the housing 504 to be inserted into the sliding cavity 502.

[0111] A shaft seal is installed between the crankshaft 4 and the bracket 101 to improve the sealing performance of the back pressure chamber 104 and prevent the back pressure chamber 104 from depressurizing too quickly.

[0112] Preferred, such as Figure 2 As shown, the sliding cavity 502 includes a second end face 5021 opposite to the groove 5012. One end of the second wire passage 402 connected to the housing 504 is located on the second end face 5021 of the sliding cavity 502. The base 5042 is attached to the second end face 5021. The terminal block 5044 is inserted downward into the second wire passage 402.

[0113] One end of the wire passage 402 connected to the housing 504 is located on the second end face 5021 of the sliding cavity 502. The base 5042 is attached to the second end face 5021, and the terminal 5044 is inserted downward into the second wire passage 402. This reduces the space occupied by the terminal 5044. Specifically, the power cord and the electromagnetic component 5 can be connected to the terminal 5044, and then the housing cover 5043 can be installed on the base 5042. The entire housing 504 is then installed into the sliding cavity 502. At this time, the terminal 5044 is inserted into the second wire passage. The terminal 5044 occupies the existing second wire passage and does not require additional space, which is beneficial for miniaturization.

[0114] Preferred, such as Figure 1-4 As shown, the moving disk 103 includes a chassis 1031 and a vortex gear 1032;

[0115] The eccentric sleeve 404 is disposed between the crankshaft 4 and the chassis 1031, and the eccentric sleeve 404 is connected to the moving disc 103; the eccentric sleeve 404 is provided with a second slot facing the crankshaft 4, and the second end of the crank pin 403 is inserted into the second slot;

[0116] The fluid passage includes a second through hole 602 provided on the chassis 1031, a third through hole 603 provided on the eccentric sleeve 404, and a fourth through hole 604 provided on the cover 5043; the first through hole 601 is located on the crank pin 403.

[0117] The moving block 501 can block the fourth through hole 604 by moving towards the moving disk 103.

[0118] The relationship between the eccentric sleeve 404, the moving disc 103, and the crank pin 403 is existing technology. By providing a second through hole 602 on the chassis 1031, a third through hole 603 on the eccentric sleeve 404, and a fourth through hole 604 on the cover 5043, the gas in the compression chamber 105 can flow to the sliding chamber 502 through a shorter path, thus reducing pressure loss.

[0119] The movable block 501 can block the fourth through hole 604, and the movable part can completely block the first through hole 601, thus providing double sealing of the fluid channel and improving the sealing performance of the electromagnetic component 5 to the fluid channel. With this configuration, when the fluid channel is completely sealed, an additional damping hole can be provided to connect the compression chamber 105 and the back pressure chamber 104. The diameter of this damping hole is extremely small, allowing only a very small amount of gas to flow between the compression chamber 105 and the back pressure chamber 104, ensuring that the pressure between the compression chamber 105 and the back pressure chamber 104 remains balanced even when the moving plate 103 rotates at a very low speed. Especially when the compressor is not working, the gas in the compression chamber 105 can also flow to the back pressure chamber 104 through the damping hole, ensuring the gas pressure balance on both sides of the moving plate 103. Compared to setting a damping orifice, which creates a gap between the moving part and the first through hole 601 and the fourth through hole 604, making the connection between the compression chamber 105 and the back pressure chamber 104 more uncontrollable and the size of the gap between the moving part and the first through hole 601 and the fourth through hole 604 difficult to set, setting a damping orifice and completely blocking the fluid channel is simpler, more convenient and controllable.

[0120] Preferred, such as Figure 2 As shown, the side wall of the second slot is provided with a first groove 405, and the end face of the eccentric sleeve 404 facing the crankshaft 4 is provided with a second groove 406. One end of the first groove 405 is connected to the connecting hole 5041, and the other end is connected to the second groove 406; the second groove 406 leads to the back pressure cavity 104.

[0121] The gas flowing out of the sliding cavity 502 passes through the buffer, the first groove 405, and the second groove 406 before entering the back pressure cavity 104.

[0122] Due to the presence of impurities, the crank pin 403 and the eccentric sleeve 404 are not absolutely fixed, but rather rotate at a certain angle. This is existing technology. The reason is that when the moving disc 103 is blocked by impurities, it can rotate at a small angle relative to the crankshaft 4 (the crank pin 403 is fixedly connected to the crankshaft 4), that is, there is relative rotation between the outer circumferential surface of the crank pin 403 and the side wall surface of the second slot. Similarly, there is relative sliding between the end face of the crankshaft 4 and the eccentric sleeve 404. By providing a first groove 405 on the side wall surface of the second slot, when the refrigerant containing lubricating oil flows through the first groove 405, the lubricating oil in the refrigerant can lubricate the gap between the second slot and the crank pin 403, reducing the friction between the crank pin 403 and the eccentric sleeve 404. Similarly, a second groove 406 is provided on the end face of the eccentric sleeve 404 facing the crankshaft 4. When the refrigerant containing lubricating oil flows through the second groove 406, it lubricates the gap between the end face of the eccentric sleeve 404 and the crankshaft 4, thereby reducing the friction between the eccentric sleeve 404 and the crankshaft 4. That is, the first groove 405 and the second groove 406 are used not only for the flow of refrigerant but also for lubricating the relatively rotating parts using the lubricating oil contained in the refrigerant.

[0123] Preferred, such as Figure 2 As shown, the fluid channel also includes a first annular groove 801 disposed on the inner wall of the second slot and surrounding the crank pin 403. The first annular groove 801 is in communication with the connecting hole 5041 and the first groove 405.

[0124] By setting the first annular groove 801, when the housing 504 is installed into the sliding cavity 502, the connecting hole 5041 can be connected to other parts of the fluid channel through the first annular groove 801, eliminating the need for the housing 504 to be installed at a specific angle, thus improving the ease of installation.

[0125] Preferred, such as Figure 7 As shown, the magnet is mounted on the bracket 101, and the induction stator is mounted on the crankshaft 4; the induction stator is connected to the terminal block 5044 via a power line; the power line is laid in the first conductor passage 401 and the second conductor passage 402.

[0126] By setting the induction stator on the crankshaft 4, the rotation of the crankshaft 4 drives the induction stator to rotate. The power line is laid in the first wire passage 401 and the second wire passage 402 on the crankshaft 4. The power line can rotate synchronously with the crankshaft 4, avoiding the power line from getting tangled.

[0127] Alternatively, the induction stator can be mounted on the bracket 101 and the magnet can be mounted on the crankshaft 4. In this case, brushes are required to transfer the current generated by the induction stator to the power lines on the crankshaft 4.

[0128] The formula for induced electromotive force is as follows:

[0129] E φ =C e *Φ*n

[0130] in,

[0131] E φ —phase electromotive force

[0132] C e —Motor structural constants

[0133] Φ—Magnetic flux per phase (unit: Wb)

[0134] n—Motor speed (r / min)

[0135] As can be seen from the induced electromotive force formula, the power generated by the induction stator is positively correlated with the rotational speed of the crankshaft 4. When the crankshaft 4 rotates faster, the voltage output by the induction stator is larger, the magnetic field strength generated by the electromagnetic component 5 is also larger, the moving distance of the moving part is larger, the opening of the first through hole 601 is also larger, and the pressure in the back pressure chamber 104 is greater. Similarly, when the crankshaft 4 rotates slower, the voltage output by the induction stator is smaller, the magnetic field strength generated by the electromagnetic component 5 is also smaller, the moving distance of the moving part is smaller, the opening of the first through hole 601 is also smaller, and the pressure in the back pressure chamber 104 is smaller. Ultimately, the pressure in the back pressure chamber 104 is positively correlated with the rotational speed of the crankshaft 4, effectively improving the performance and reliability of the compressor. Furthermore, it requires fewer additional parts, has a simple implementation method, and is not difficult to process and assemble, allowing for significant benefits at a relatively low cost.

[0136] Preferred, such as Figure 3 As shown, a winding section is provided on the crankshaft 4, and a third coil 703 is wound on the winding section. The third coil 703 is wound along the axial direction of the crankshaft 4; the induction stator includes the third coil 703.

[0137] By utilizing the structure of crankshaft 4, the third coil 703 is wound around crankshaft 4, and the wire is wound along the axial direction of crankshaft 4, so that when crankshaft 4 rotates, the third coil 703 cuts the magnetic field to generate current; this method is simple to produce.

[0138] A second annular groove 802 can be provided at the location where the induction stator is set. The second annular groove 802 surrounds the crankshaft 4. The power line connected to the third coil 703 can enter the second wire passage 402 through the second annular groove 802, ensuring that the power line is more firmly fixed.

[0139] Preferred, such as Figure 7 As shown, the side of the stationary disk 102 away from the moving disk 103 is a high-pressure zone, and the high-pressure zone can communicate with the compression zone;

[0140] The fluid passage includes a first passage 301 disposed on the stationary plate 102 and a second passage 302 disposed on the support 101; the first end of the first passage 301 leads to the high pressure zone, the second end of the first passage 301 is connected to the second passage 302, the first end of the second passage 302 is connected to the second end of the first passage 301, and the second end of the second passage 302 leads to the back pressure chamber 104.

[0141] The second passage 302 includes the first through hole 601, and the sliding cavity 502 is disposed on the second passage 302.

[0142] When the scroll compressor is vertical, the high-pressure zone is the area between the stationary plate 102 and the outer casing 303 of the scroll compressor. The high-pressure gas discharged from the exhaust port on the stationary plate 102 first enters the high-pressure zone and then is discharged to the outside of the outer casing 303 through the high-pressure zone.

[0143] By setting the sliding cavity 502 on the second passage 302 on the bracket 101, the gas directly entering the back pressure cavity 104 is the gas from the high-pressure zone. That is, the gas is first discharged from the compression cavity 105 into the high-pressure zone, and then enters the sliding cavity 502 through the second passage 302. Since the gas in the high-pressure zone is mainly discharged to the outside of the outer shell 303, the gas pressure in the high-pressure zone is lower than the gas pressure in the compression cavity 105. The gas pressure entering the sliding cavity 502 through the second passage 302 is lower than the gas pressure entering the sliding cavity 502 through the second through hole 602, the third through hole 603, and the fourth through hole 604. This allows the moving plate 103 to be adjusted by introducing the back pressure cavity 104 from the high-pressure zone, which is suitable for situations with low external operating conditions. The structure is compact and the processing is relatively simple and convenient.

[0144] The method of entering the back pressure chamber 104 from the compression chamber 105 through the second through hole 602, the third through hole 603, the fourth through hole 604, the sliding chamber 502, the first through hole 601, the first groove 405, and the second groove 406 is suitable for situations with high external operating conditions. The electromagnetic component 5 can first reduce the pressure of the gas discharged from the compression chamber 105 to avoid excessive pressure in the back pressure chamber 104. Moreover, this method is suitable for a wider range of operating conditions, but the processing is more complex.

[0145] The inner wall of the sliding cavity 502 is provided with a third annular groove 803 surrounding the housing 504. The third annular groove 803 is connected to the connecting hole 5041 and the first through hole 601.

[0146] Thus, when the housing 504 is inserted into the sliding cavity 502, the connecting hole 5041 and the first through hole 601 can be connected without alignment.

[0147] Preferred, such as Figure 7 As shown, the induction stator is mounted on the bracket 101, and the magnet is mounted on the crankshaft 4.

[0148] Since the electromagnetic component 5 is fixed on the bracket 101, the induction stator is set on the bracket 101, and the magnet is set on the crankshaft 4 to rotate with the crankshaft 4; the current generated by the induction stator is transmitted to the electromagnetic component 5 through the power line, which simplifies the layout of the power line.

[0149] Alternatively, the induction stator can be mounted on the crankshaft 4 and then mounted on the bracket 101 via a magnet. In this case, brushes are needed to transmit the current generated by the induction stator to the electromagnetic assembly 5.

[0150] Preferred, such as Figure 8-9 As shown, the scroll compressor also includes a housing 303 and a rear cover 304, with a receiving cavity 305 formed between the housing 303 and the rear cover 304;

[0151] The crankshaft 4 extends out of the housing 303 and into the receiving cavity 305 at one end away from the moving disc 103; the part of the crankshaft 4 that extends out of the housing 303 is the protrusion, the magnet is disposed on the protrusion, and the induction stator is disposed on the rear cover 304.

[0152] By extending the crankshaft 4 out of the scroll compressor housing 303, the space occupied by the scroll compressor is reduced, facilitating installation and production, and resulting in a larger induced current. Furthermore, existing scroll compressors can be quickly retrofitted. When the induction stator is fixed to the extended portion and the magnet is fixed to the rear cover 304, a brush is installed on the extended portion, with one end connected to the power line and the other end in contact with the induction stator.

[0153] Preferred, such as Figure 8-9 As shown, a motor is provided between the bracket 101 and the receiving cavity 305, and an interval cavity 306 is formed between the motor and the bracket 101. The wiring terminal 5044 of the electromagnetic component 5 is located in the interval cavity 306.

[0154] The outer casing 303 has a first groove 201 extending radially along the side facing the rear cover 304. The outer casing 303 has a second groove 202 penetrating through it. The inner side of the outer casing 303 has a third groove 203 extending axially along it. The first groove 201, the second groove 202, and the third groove 203 are connected end to end in sequence. The third groove 203 leads to the spacer cavity 306.

[0155] The induction stator inside the cavity 305 is connected to the terminal block 5044 via a power line. The power line is laid in the first slot 201, the second slot 202 and the third slot 203, which improves the safety of the power line.

[0156] Preferred, such as Figure 8-9 As shown, the scroll compressor includes a housing 303 and a rear cover 304, with a receiving cavity 305 formed between the housing 303 and the rear cover 304;

[0157] The crankshaft 4 extends out of the housing 303 and into the receiving cavity 305 at one end away from the moving plate 103; the part of the crankshaft 4 that extends out of the housing 303 is the protrusion part, the induction stator is disposed on the protrusion part, the magnet is disposed on the rear cover 304, and the first wire passage 401 leads to the receiving cavity 305.

[0158] By extending the crankshaft 4 out of the scroll compressor housing 303, the space occupied by the scroll compressor is reduced, facilitating installation and production, and resulting in a larger induced current. Furthermore, existing scroll compressors can be quickly retrofitted. When the induction stator is fixed to the extended portion and the magnet is fixed to the rear cover 304, a brush is installed on the extended portion. One end of the brush is connected to the power line, and the other end contacts the induction stator. An insulating component is provided at the point where the brush is fixed to the crankshaft 4 to prevent the crankshaft 4 from conducting electricity.

[0159] Alternatively, the induction stator can be mounted on the rear cover 304, the magnet can be mounted on the protrusion, and a brush can be mounted on the protrusion. One end of the brush is connected to the power line, and the other end is in contact with the induction stator.

[0160] The induction stator is interference-fitted onto the rear cover 304, and the rear cover 304 and the outer casing 303 are fixed and sealed by seals and screws.

[0161] Preferred, such as Figure 10 As shown, the induction stator includes an iron core 307 and a second coil 702 disposed on the iron core 307; the iron core 307 is disc-shaped and perpendicular to the axis of the crankshaft 4; the iron core 307 is provided with a shaft hole 308, the iron core 307 is sleeved on the crankshaft 4 through the shaft hole 308, a gap is formed between the inner circular surface of the shaft hole 308 and the outer circular surface of the crankshaft 4, and the second coil 702 is wound on the iron core 307 along the radial direction of the iron core 307;

[0162] The magnet includes a first permanent magnet 9021 fixed on the crankshaft 4 and located on one side of the axial direction of the iron core 307.

[0163] By designing the iron core 307 as a disc and fitting it perpendicularly to the axis of the crankshaft 4, when the crankshaft 4 drives the first permanent magnet 9021 to rotate, the second coil 702 generates an induced current, which is transmitted to the electromagnetic component 5 via the power line. Compared with the traditional cylindrical iron core 307, this method makes full use of the radial space of the compressor and reduces the axial distance of the crankshaft 4, which is beneficial for the miniaturization of the compressor.

[0164] A second permanent magnet 9022 can be disposed on the other side of the iron core 307 opposite to the first permanent magnet 9021. The magnetic poles of the second permanent magnet 9022 and the first permanent magnet 9021 have the same direction. By appropriately increasing the axial dimension, the magnetic field strength that the second coil 702 can cut is significantly increased, and the magnetic field density between the first permanent magnet 9021 and the second permanent magnet 9022 is uniform, making the induced current generated by the second coil 702 more stable.

[0165] A rectifier can be installed to rectify the induced current generated by the induction stator before it is connected to the electromagnetic component 5. This allows for a more stable current input to the electromagnetic component 5, resulting in more stable movement of the moving part and more precise adjustment of the opening of the first through hole 601. This magnet and induction stator structure is suitable for a single-sided structure, requiring only one first permanent magnet 9021 installed near the bracket 101. The first permanent magnet 9021 can be directly mounted on the bracket 101.

[0166] Preferred, such as Figure 10 As shown, the iron core 307 is provided with an air passage 3071, which passes through both ends of the iron core 307 along its axial direction.

[0167] When the crankshaft 4 rotates, the gas on both sides of the iron core 307 can flow to each other through the air hole 3071, avoiding the pressure imbalance on both sides of the iron core 307. When the iron core 307 is installed inside the compressor housing 303, the refrigerant can also flow through the air hole, preventing the refrigerant from accumulating on one side of the iron core 307 and causing a large axial pressure on the iron core 307, which would cause the crankshaft 4 to move axially.

[0168] Preferred, such as Figure 11-13 As shown, a fixing plate 309 is fixedly installed on the crankshaft 4. The fixing plate 309 is disc-shaped and perpendicular to the axis of the crankshaft 4.

[0169] The fixing plate 309 has a snap-fit ​​portion 3093 with an opening facing the tangential direction of the fixing plate 309. The snap-fit ​​portion 3093 is fan-shaped. The snap-fit ​​portion 3093 has a first slot 3091. The first permanent magnet 9021 can be snapped into the first slot 3091 through the opening of the snap-fit ​​portion 3093. The shape of the first permanent magnet 9021 matches that of the snap-fit ​​portion 3093.

[0170] First, fix the fixing plate 309 on the crankshaft 4, and then fix the first permanent magnet 9021 on the fixing plate 309 to facilitate the installation of the first permanent magnet.

[0171] When the fixed plate 309 performs circular motion, the first permanent magnet 9021 tends to move outward along the radial direction of the fixed plate 309 under the action of centrifugal force. The opening of the locking part 3093 faces the tangential direction of the fixed plate 309, and the first permanent magnet 9021 will not fly out from the opening of the locking part 3093 under the action of centrifugal force. Since the locking part 3093 is fan-shaped, the shape of the first permanent magnet 9021 matches that of the locking part 3093, making the fixed plate 309 more stable when rotating. The opening of the locking part 3093 facing the tangential direction of the fixed plate 309 makes it easier for the first permanent magnet 9021 to be inserted into the first slot 3091. Since both the locking part 3093 and the first permanent magnet 9021 are fan-shaped, if the opening of the locking part 3093 faces the radially inward side of the fixed plate 309, the first permanent magnet 9021 cannot be inserted.

[0172] Furthermore, placing the snap-fit ​​part 3093 on the plate surface near the iron core 307 is beneficial to increasing the magnetic field strength passing through the second coil 702.

[0173] Preferred, such as Figure 14-15 As shown, a stop is provided at the opening of the snap-fit ​​part 3093, and a second snap-fit ​​groove 3092 is formed between the stop and the snap-fit ​​part 3093;

[0174] The latching part 3093 also includes a baffle 3094 that latches into the second slot 3092. When the baffle 3094 is latched into the second slot 3092, the second baffle 3094 can block the opening of the latching part 3093.

[0175] The baffle 3094 is inserted into the second slot 3092 to seal the opening of the locking part 3093, further fixing the first permanent magnet 9021 that is inserted into the first slot 3091. This improves the firmness of the first permanent magnet 9021.

[0176] A protrusion or a recess can be provided in the second slot 3092, and a corresponding recess or protrusion can be provided on the baffle 3094. When the baffle 3094 is inserted into the second slot 3092, the recess on the baffle 3094 cooperates with the protrusion in the second slot 3092, or the protrusion on the baffle 3094 cooperates with the recess in the second slot 3092 to fix the baffle 3094 and prevent the baffle 3094 from disengaging from the second slot 3092 along the axial direction of the fixed plate 309 when the fixed plate 309 is rotated. Limiting blocks can be provided at opposite ends of the baffle 3094. When the baffle 3094 is inserted into the second slot 3092, the limiting blocks are engaged on the outside of the engaging part 3093, thereby limiting the baffle 3094 in the radial direction of the fixing plate 309 and preventing the baffle 3094 from disengaging from the second slot 3092 along the radial direction of the fixing plate 309 during rotation. Furthermore, adhesive can be applied to the first slot 3091. When the first permanent magnet 9021 is inserted into the first slot 3091, the first permanent magnet 9021 is tightly connected to the engaging part 3093 through the adhesive.

[0177] The second permanent magnet 9022 is configured in exactly the same way as the first permanent magnet 9021.

[0178] Unlike placing the electromagnetic component 5 on the intake passage of the back pressure chamber 104, a pressure relief channel can also be set on the bracket 101 or the crankshaft 4. One end of the pressure relief channel is connected to the back pressure chamber 104, and the other end is connected to the low-pressure area (the low-pressure area is generally the area on the other side of the bracket 101 opposite to the back pressure chamber 104). When the electromagnetic component 5 is placed on the pressure relief channel, the high-pressure gas discharged from the compression chamber 105 directly enters the back pressure chamber 104. The pressure in the back pressure chamber 104 is relatively high. By adjusting the electromagnetic component 5 on the pressure relief channel, the pressure in the back pressure chamber 104 is relieved, so that the pressure in the back pressure chamber 104 is balanced with the pressure in the compression chamber 105.

[0179] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0180] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A scroll compressor, comprising a stationary disc (102) and a moving disc (103) cooperating with each other, a bracket (101) and a crankshaft (4); a back pressure chamber (104) is formed between the moving disc (103) and the bracket (101), and a compression chamber (105) is formed between the moving disc (103) and the stationary disc (102), characterized in that, A fluid passage is provided between the compression chamber (105) and the back pressure chamber (104), and an electromagnetic component (5) is provided in the fluid passage. The scroll compressor is also equipped with a magnet and an induction stator. The induction stator can rotate relative to the magnet and generate current under the drive of the crankshaft. The induction stator is connected to the electromagnetic component (5) via a power line. The electromagnetic component (5) includes a moving block (501), the moving distance of the moving block (501) is positively correlated with the magnitude of the current received by the electromagnetic component (5), and the flow area of ​​the fluid passage is positively correlated with the moving distance of the moving block (501). A sliding cavity (502) is provided in the fluid passage, and the electromagnetic component (5) is disposed in the sliding cavity (502); The scroll compressor also includes a crank pin (403) and an eccentric sleeve (404). The crankshaft (4) is provided with a first slot at one end facing the eccentric sleeve (404). The first end of the crank pin (403) facing the crankshaft (4) is inserted into the first slot. The sliding cavity (502) is provided on the crank pin (403). The electromagnetic component (5) includes a housing (504) disposed within the sliding cavity (502); The crankshaft (4) is provided with a first wire passage (401), and the crank pin (403) is provided with a second wire passage (402). One end of the second wire passage (402) is connected to the housing (504), and the other end is connected to the first wire passage (401). The crankshaft (4) is provided with a power source, and the first wire passage (401) leads to the induction stator or magnet. The sliding cavity (502) includes an inner wall; the fluid passage includes a first through hole (601) disposed on the inner wall. The movable block (501) includes an outer wall, and the movement of the movable block (501) in a direction away from or close to the moving plate (103) can change the opening of the first through hole (601) through the outer wall.

2. The scroll compressor according to claim 1, characterized in that, The electromagnetic component (5) further includes a first coil (701) and an elastic element. The induction stator is connected to the first coil (701) via a power line. When the first coil (701) is energized, it can drive the moving block (501) to move. The movement of the moving block (501) can cause the elastic element to deform.

3. The scroll compressor according to claim 2, characterized in that, The movable block (501) includes a first end face (5011) perpendicular to the direction of movement of the movable block (501), and the first end face (5011) is provided with a groove (5012), and part of the elastic element is disposed in the groove (5012).

4. The scroll compressor according to claim 3, characterized in that, The outer surface of the housing (504) is sealed to the inner surface of the sliding cavity (502), and the housing (504) is provided with a connecting hole (5041), which communicates with the first through hole (601); The movable block (501), the first coil (701), and the elastic element are all disposed within the housing (504).

5. The scroll compressor according to claim 4, characterized in that, The housing (504) includes a base (5042) and a cover (5043) disposed on the base (5042); the elastic element is a spring (503), one end of the spring (503) is connected to the groove (5012), and the other end of the spring (503) is connected to the base (5042); the first coil (701) is disposed inside the spring (503).

6. The scroll compressor according to claim 5, characterized in that, The spring (503) is a helical spring (503), and the helical spring (503) and the first coil (701) constitute the same elastic coil.

7. The scroll compressor according to claim 5, characterized in that, The base (5042) has a wiring terminal (5044) on the side facing away from the groove (5012).

8. The scroll compressor according to claim 7, characterized in that, The sliding cavity (502) includes a second end face (5021) opposite to the groove (5012), one end of the second wire passage (402) connected to the housing (504) is located on the second end face (5021) of the sliding cavity (502), the base (5042) is abutted against the second end face (5021), and the terminal block (5044) is inserted downward into the second wire passage (402).

9. The scroll compressor according to claim 8, characterized in that, The moving disk (103) includes a chassis (1031) and a spiral tooth (1032). The eccentric sleeve (404) is disposed between the crankshaft (4) and the chassis (1031), and the eccentric sleeve (404) is connected to the moving disc (103); the eccentric sleeve (404) is provided with a second slot facing the crankshaft (4), and the second end of the crank pin (403) is inserted into the second slot; The fluid passage includes a second through hole (602) on the chassis (1031), a third through hole (603) on the eccentric sleeve (404) and a fourth through hole (604) on the cover (5043); the first through hole (601) is located on the crank pin (403); The moving block (501) can block the fourth through hole (604) by moving toward the moving plate (103).

10. The scroll compressor according to claim 9, characterized in that, The second slot has a first groove (405) on its side wall and a second groove (406) on the end face of the eccentric sleeve (404) facing the crankshaft (4). One end of the first groove (405) is connected to the connecting hole (5041) and the other end is connected to the second groove (406). The second groove (406) leads to the back pressure cavity (104).

11. The scroll compressor according to claim 10, characterized in that, The fluid passage also includes a first annular groove (801) disposed on the inner wall of the second slot and surrounding the crank pin (403), the first annular groove (801) being in communication with the connecting hole (5041) and the first groove (405).

12. The scroll compressor according to claim 7, characterized in that, The magnet is mounted on the bracket (101), and the induction stator is mounted on the crankshaft (4); the induction stator is connected to the terminal block (5044) via a power line; the power line is laid in the first conductor path (401) and the second conductor path (402).

13. The scroll compressor according to claim 12, characterized in that, The crankshaft (4) is provided with a winding part, and a third coil (703) is wound on the winding part. The third coil (703) is wound along the axial direction of the crankshaft (4). The induction stator includes the third coil (703).

14. The scroll compressor according to claim 13, characterized in that, The scroll compressor includes a housing (303) and a rear cover (304), with a receiving cavity (305) formed between the housing (303) and the rear cover (304). The crankshaft (4) extends out of the housing (303) and into the receiving cavity (305) at one end away from the moving plate (103); the part of the crankshaft (4) extending out of the housing (303) is the protrusion, the induction stator is disposed on the protrusion, the magnet is disposed on the rear cover (304), and the first wire passage (401) leads to the receiving cavity (305).

15. The scroll compressor according to claim 12, characterized in that, The induction stator includes an iron core (307) and a second coil (702) disposed on the iron core (307); the iron core (307) is disc-shaped and perpendicular to the axis of the crankshaft (4); the iron core (307) is provided with a shaft hole (308), the iron core (307) is sleeved on the crankshaft (4) through the shaft hole (308), a gap is formed between the inner circular surface of the shaft hole (308) and the outer circular surface of the crankshaft (4), and the second coil (702) is wound on the iron core (307) along the radial direction of the iron core (307); The magnet includes a first permanent magnet (9021) fixed on the crankshaft (4) and located on one axial side of the iron core (307).

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