A scroll electric compressor

Abstract

The present invention discloses a scroll electric compressor, which relates to the technical field of compressors and includes a main body, wherein a fixed scroll and an orbiting scroll are provided on the main body, and a plurality of compression chambers are formed between the fixed scroll and the orbiting scroll, and an oil spray hole and a sealing mechanism are provided on the fixed scroll; the oil spray hole is used to spray cooling oil into the compression chamber; the sealing mechanism is used to seal the oil spray hole, and when the orbiting scroll moves so that the oil spray hole moves relatively to the center position of the compression chamber, the sealing mechanism opens the oil spray hole. The scroll electric compressor provided by the present invention opens the oil spray hole through the sealing mechanism to spray cooling oil into the compression chamber when the orbiting scroll moves to a specified position on the fixed scroll so that the oil spray hole is in the center position of the corresponding compression chamber, so that the oil spray cooling operation can be performed on the compression chamber accurately, and the cooling oil can be avoided as much as possible from being sprayed onto the side wall of the orbiting scroll and affecting the cooling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a scroll electric compressor. Background Art

[0002] A scroll compressor is a compressible volume compressor consisting of a fixed involute scroll and an eccentrically rotating, translationally moving involute scroll. Gas is drawn into the periphery of the stator disk. As the eccentric shaft rotates, the gas is gradually compressed within the crescent-shaped compression chambers formed by the meshing of the moving and stator disks. The gas is then continuously discharged through the axial hole in the center of the stator disk.

[0003] For example, the patent document with the authorization announcement number CN117662477B and the authorization announcement date April 16, 2024, and the name "A closed scroll compressor oil injection cooling structure for helium", its oil injection assembly includes an oil inlet channel arranged inside the static scroll plate, and the oil inlet channel is connected to at least a first oil hole and a second oil hole, and the first oil hole and the second oil hole are respectively connected to the first compression chamber and the second compression chamber.

[0004] In the prior art, the orbiting scroll can intermittently open the oil spray holes during its movement to spray cooling oil into the compression chamber. However, there is a situation where the orbiting scroll blocks some of the oil spray holes. Obviously, at this time, the oil spray holes will spray the cooling oil onto the outer wall of the orbiting scroll, that is, it cannot accurately spray the cooling oil to the center position of the compression chamber, which will affect the cooling efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a scroll electric compressor to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A scroll electric compressor includes a main body, on which a fixed scroll and an orbiting scroll are provided, a plurality of compression chambers are formed between the fixed scroll and the orbiting scroll, and the fixed scroll is provided with:

[0008] An oil spray hole, which is used to spray cooling oil into the compression chamber;

[0009] The sealing mechanism is used to seal the oil injection hole. When the movable scroll moves to relatively move the oil injection hole to the center position of the compression chamber, the sealing mechanism opens the oil injection hole.

[0010] The above-mentioned scroll electric compressor has a buffer chamber on the main body, an exhaust pipe connected to the buffer chamber on the fixed scroll, a baffle on the exhaust pipe, and a first elastic member on the fixed scroll for forcing the baffle to block the exhaust pipe.

[0011] In the above-mentioned scroll electric compressor, an oil inlet pipe is provided in the buffer chamber, and one end of the oil inlet pipe is connected to the oil injection hole.

[0012] In the above-mentioned scroll electric compressor, the blocking mechanism includes a blocking groove constructed on the oil inlet pipe, and a blocking plate for blocking the oil injection hole is slidably connected in the blocking groove.

[0013] In the above-mentioned scroll electric compressor, the oil injection holes and the sealing mechanisms are provided in multiple groups, a first connecting rod is provided on the fixed scroll plate, and the multiple sealing plates are fixed to the first connecting rod.

[0014] In the above-mentioned scroll electric compressor, the fixed scroll is provided with a second elastic member for forcing the blocking plate to extend into the blocking groove, the fixed scroll is slidably connected with a trigger plate, and the trigger plate is transmission-connected to the orbiting scroll.

[0015] In the above-mentioned scroll electric compressor, a through groove is constructed on the fixed scroll, the trigger plate is located on the side of the fixed scroll away from the orbiting scroll and the area of ​​the trigger plate is larger than the area of ​​the through groove, the trigger plate is slidably connected in the through groove, and a linkage rod is hinged on the orbiting scroll, and the other end of the linkage rod is hinged to the trigger plate.

[0016] In the above-mentioned scroll electric compressor, a square frame is constructed on the first connecting rod, and a wedge-shaped surface is constructed on the square frame.

[0017] In the above-mentioned scroll electric compressor, when the movable scroll drives the trigger plate to move to one end of the through groove, the oil injection holes are respectively located at the center position of the corresponding compression chamber, the trigger plate contacts the first connecting rod to force the sealing plate to open the oil injection hole, and at the same time, the square frame forces the baffle to move away from the exhaust pipe through the wedge surface.

[0018] In the above-mentioned scroll electric compressor, the oil injection hole includes a first oil hole and a second oil hole.

[0019] In the above technical solution, the present invention provides a scroll electric compressor. When the movable scroll moves to a specified position on the fixed scroll so that the oil spray hole is in the center position of the corresponding compression chamber, the oil spray hole is opened by a sealing mechanism to spray cooling oil into the compression chamber. In this way, the compression chamber can be accurately sprayed with oil for cooling, and the cooling oil can be avoided as much as possible from being sprayed onto the side wall of the movable scroll and affecting the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a buffer chamber provided in yet another embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of an orbiting scroll provided in yet another embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the compression chamber structure provided by yet another embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a first connecting rod structure provided in yet another embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the exhaust pipe structure provided in yet another embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a through-groove structure provided in yet another embodiment of the present invention;

[0028] Figure 8 A schematic block diagram of another embodiment of the present invention;

[0029] Figure 9 A schematic diagram of a second connecting rod structure provided in yet another embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of a linkage rod structure provided in yet another embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Main body; 2. Stationary scroll; 3. Orbital scroll; 4. Compression chamber; 5. Oil injection hole; 51. First oil hole; 52. Second oil hole; 6. Buffer chamber; 7. Exhaust pipe; 8. Baffle; 9. First elastic member; 10. Bracket; 11. Oil inlet pipe; 12. Sealing plate; 13. First connecting rod; 14. Second elastic member; 15. Trigger plate; 16. Through groove; 17. Linkage rod; 18. Interference part; 19. Frame; 20. Wedge surface; 21. Second connecting rod; 22. Connecting part. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Reference Figure 1-10 An embodiment of the present invention provides a scroll electric compressor, including a main body 1, on which a fixed scroll 2 and an orbiting scroll 3 are provided, and a plurality of compression chambers 4 are formed between the fixed scroll 2 and the orbiting scroll 3. The fixed scroll 2 is provided with an oil spray hole 5 and a sealing mechanism; the oil spray hole 5 is used to spray cooling oil into the compression chamber 4; the sealing mechanism is used to seal the oil spray hole 5, and when the orbiting scroll 3 moves so that the oil spray hole 5 moves relatively to the center position of the compression chamber 4, the sealing mechanism opens the oil spray hole 5.

[0035] Specifically, a driving motor and an eccentric shaft structure are provided in the main body 1, and the eccentric shaft structure can drive the movable scroll 3 to rotate in the main body 1. At the same time, an anti-rotation structure is also provided in the main body 1, so that the movable scroll 3 can move in a circular motion on the static scroll 2 without rotating itself, thereby forming a plurality of compression chambers 4 between the static scroll 2 and the movable scroll 3, and the volume of the plurality of compression chambers 4 gradually decreases from the outside to the inside, thereby compressing the air; the above are all existing technologies and will not be repeated here. The innovation of the embodiment of the present invention is that an oil spray hole 5 and a sealing mechanism are provided on the fixed scroll 2, and the oil spray hole 5 can be connected to the cooling oil circulation structure in the prior art to spray the cooling oil into the compression chamber 4; the sealing mechanism can select the solenoid valve structure in the prior art to seal the oil spray hole 5; the sealing mechanism operates based on the movement of the movable scroll 3, and a position sensor can be provided on the fixed scroll 2. When the movable scroll 3 moves to a specified position on the fixed scroll 2 so that the oil spray hole 5 is in the center position of the corresponding compression chamber 4 (the relative center position can be sufficient), the solenoid valve structure opens the oil spray hole 5 to spray cooling oil into the compression chamber 4, so that the compression chamber 4 can be accurately subjected to oil spray cooling operation, and the cooling oil can be avoided as much as possible from being sprayed onto the side wall of the movable scroll 3 and affecting the cooling efficiency.

[0036] In another embodiment provided by the present invention, further, a buffer chamber 6 is provided on the main body 1, an exhaust pipe 7 connected to the buffer chamber 6 is constructed on the static scroll 2, a baffle 8 is provided on the exhaust pipe 7, and a first elastic member 9 for forcing the baffle 8 to block the exhaust pipe 7 is provided on the static scroll 2. Specifically, the exhaust pipe 7 is located at the center of the static scroll 2. During the circular motion of the movable scroll 3 relative to the static scroll 2, the air in the compression chamber 4 is compressed and gradually moves to the center of the static scroll 2 until the compression chamber 4 is connected to the exhaust pipe 7. The compressed gas is discharged into the buffer chamber 6 through the exhaust pipe 7 (a pipeline is provided on one side of the buffer chamber 6 to discharge the compressed gas); in order to prevent the gas in the buffer chamber 6 from flowing back between the static scroll 2 and the movable scroll 3, a baffle 8 and a first elastic member 9 are provided on the exhaust pipe 7. Part 9, the inner wall of the exhaust pipe 7 is constructed with a bracket 10, which does not affect the flow of gas in the exhaust pipe 7. The first elastic member 9 can adopt the spring structure in the prior art, one end of which is fixed on the bracket 10, and the other end is fixed on the baffle 8, so as to force the baffle 8 to block the exhaust pipe 7 through the first elastic member 9; such an arrangement can make the baffle 8 intermittently open the exhaust pipe 7 with the circumferential motion of the movable scroll 3, and then the intermittently discharged high-pressure air can be buffered by the buffer chamber 6, and then the gas can be discharged through the pipeline provided on the buffer chamber 6.

[0037] As an alternative to the solenoid valve structure used in the above-mentioned sealing mechanism, it is preferred that an oil inlet pipe 11 is provided in the buffer chamber 6, and one end of the oil inlet pipe 11 is connected to the oil injection hole 5. The sealing mechanism includes a sealing groove constructed on the oil inlet pipe 11, and a sealing plate 12 for sealing the oil injection hole 5 is slidably connected in the sealing groove. Specifically, one end of the oil inlet pipe 11 is connected to the oil injection hole 5, and the other end is connected to the cooling oil circulation pipeline (this is a prior art, not shown in the figure, and will not be repeated here) to spray the cooling oil into the compression chamber 4 through the oil inlet pipe 11 and the oil injection hole 5; the sealing groove is constructed on one side of the oil inlet pipe 11, and the sealing plate 12 is attached to the outer wall of the static vortex disk 2, and a dynamic sealing structure is provided between the sealing plate 12 and the sealing groove to prevent the cooling oil in the oil inlet pipe 11 from leaking from the sealing groove as much as possible, and when the sealing plate 12 extends into the sealing groove, the cooling oil in the oil inlet pipe 11 is prevented from leaking from the sealing groove. When blocking the groove, the connection between the oil inlet pipe 11 and the oil spray hole 5 can be blocked by the sealing plate 12 to stop spraying cooling oil into the compression chamber 4. When the sealing plate 12 moves out of the sealing groove, the connection between the oil inlet pipe 11 and the oil spray hole 5 is opened to spray cooling oil into the compression chamber 4. With this arrangement, a linear drive structure (such as an electric push rod) can be set on the fixed scroll 2 to drive the sealing plate 12 to move along the sealing groove, and then the oil spray hole 5 is blocked or opened based on the position of the movable scroll 3.

[0038] Furthermore, the oil injection hole 5 and the blocking mechanism are provided in multiple groups, the fixed scroll 2 is provided with a first connecting rod 13, and the multiple blocking plates 12 are fixed to the first connecting rod 13. Specifically, Figure 4 As shown, when the relative positions of the movable scroll 3 and the fixed scroll 2 are determined, there are several compression chambers 4 between the two. For this purpose, multiple groups of oil spray holes 5 and sealing mechanisms can be set on the fixed scroll 2 to spray cooling oil into multiple compression chambers 4 through multiple oil spray holes 5 when the movable scroll 3 moves to the specified position; in this embodiment, the first connecting rod 13 is located in the buffer chamber 6, and the sealing plates 12 in the multiple groups of sealing mechanisms are all fixed to the first connecting rod 13. With this arrangement, a linear drive structure is set on the fixed scroll 2 to synchronously drive multiple sealing plates 12 to open the oil spray holes 5 to spray cooling oil into the corresponding compression chambers 4, thereby improving the cooling efficiency.

[0039] Furthermore, the fixed scroll 2 is provided with a second elastic member 14 for forcing the sealing plate 12 into the sealing groove. A trigger plate 15 is slidably connected to the fixed scroll 2 and is in driving connection with the orbiting scroll 3. A through-groove 16 is configured on the fixed scroll 2. The trigger plate 15 is located on the side of the fixed scroll 2 away from the orbiting scroll 3 and has an area larger than that of the through-groove 16. The trigger plate 15 is slidably connected within the through-groove 16. A linkage rod 17 is hingedly connected to the orbiting scroll 3, the other end of which is hingedly connected to the trigger plate 15. Specifically, the second elastic member 14 and the trigger plate 15 are both located in the buffer chamber 6. The second elastic member 14 can adopt a spring structure in the prior art, one end of which is fixed to the fixed scroll 2, and the other end is fixed to the first connecting rod 13, so as to force the first connecting rod 13 to move to one side through the spring, thereby driving the multiple blocking plates 12 to extend into the corresponding blocking grooves respectively, thereby blocking the multiple oil injection holes 5 (such as Figure 5As shown in FIG5 , the trigger plate 15 is attached to the outer wall of the inlet scroll, and when it slides along the through groove 16, it can keep the through groove 16 blocked, and try to avoid the gas on both sides of the fixed scroll 2 from flowing to each other; one end of the linkage rod 17 is hinged to the outer wall of the orbiting scroll 3, and the other end extends into the through groove 16 and is hinged to the trigger plate 15. When the orbiting scroll 3 makes a circular motion on the fixed scroll 2, the linkage rod 17 can drive the trigger plate 15 to slide back and forth in the through groove 16, and the through groove 16 and the linkage rod 17 are always in On the outside of the movable scroll 3, it will not affect the operation of the movable scroll 3; a resistance portion 18 is constructed on the trigger plate 15, and the end of the first connecting rod 13 extends to the sliding stroke of the resistance portion 18. When the trigger plate 15 slides to one end of the through groove 16, the resistance portion 18 resists the end of the first connecting rod 13, so that the first connecting rod 13 overcomes the elastic force of the second elastic member 14 and drives the multiple blocking plates 12 to move out of the corresponding blocking grooves, thereby synchronously opening the multiple oil injection holes 5 to spray cooling oil to the center position of the corresponding compression chamber 4. The advantage of such a setting is that the movable scroll 3 can drive the trigger plate 15 to slide back and forth during the circular motion, and the reciprocating sliding of the trigger plate 15 can intermittently drive the first connecting rod 13 and the multiple blocking plates 12 to operate, thereby intermittently opening the multiple oil injection holes 5, so that when the oil injection holes 5 move relatively to the center position of the corresponding compression chamber 4, the cooling oil is sprayed into the compression chamber 4.

[0040] In another embodiment provided by the present invention, further, a square frame 19 is constructed on the first connecting rod 13, and a wedge-shaped surface 20 is constructed on the frame 19. Specifically, the interior of the square frame 19 is hollow, and the exhaust pipe 7 is located in the square frame 19. When the frame 19 moves with the first connecting rod 13, the exhaust pipe 7 moves relatively in the frame 19; wedge-shaped surfaces 20 are constructed on both opposite sides of the frame 19. When the frame 19 moves with the first connecting rod 13, the two wedge-shaped surfaces 20 can resist the baffle 8 on the exhaust pipe 7, so as to force the baffle 8 to overcome the elastic force of the first elastic member 9 and open the exhaust pipe 7; in this embodiment, the elastic force of the first elastic member 9 is relatively large. The high-pressure air at the center of the fixed scroll 2 cannot force the baffle 8 to open the exhaust pipe 7. That is, when the compression chamber 4 is connected to the exhaust pipe 7, the air therein cannot be discharged and continues to be compressed by the orbiting scroll 3. Until the trigger plate 15 drives the first connecting rod 13 to operate to open the oil injection hole 5, the frame 19 moves with the first connecting rod 13 to force the baffle 8 to open the exhaust pipe 7 through the wedge surface 20, thereby discharging the high-pressure air in the compression chamber 4 at the center of the fixed scroll 2 into the buffer chamber 6. With this arrangement, when the orbiting scroll 3 drives the trigger plate 15 to move to one end of the through-slot 16, the oil injection hole 5 is located at the center of the corresponding compression chamber 4. The trigger plate 15 contacts the first connecting rod 13 to force the blocking plate 12 to open the oil injection hole 5. At the same time, the frame 19 forces the baffle 8 away from the exhaust pipe 7 through the wedge surface 20. The advantage is that by increasing the elastic force of the first elastic member 9, the high-pressure air in the compression chamber 4 can be delayed from being discharged into the buffer chamber 6, thereby further pressurizing the air in the compression chamber 4 and thereby improving the compression efficiency; in this way, the exhaust pipe 7 can be intermittently opened while the multiple oil injection holes 5 are intermittently opened, so that the high-pressure air can be buffered in the buffer chamber 6 and then discharged.

[0041] In another embodiment provided by the present invention, as an alternative to the synchronous injection of multiple oil injection holes 5, the oil injection holes 5 further include a first oil hole 51 and a second oil hole 52 ( Figure 10In the embodiment, four oil spray holes 5 are provided on the static scroll plate 2, the two inner ones are the first oil holes 51, and the two outer ones are the second oil holes 52). Specifically, in the above embodiment, multiple oil spray holes 5 can be provided at the same time to spray cooling oil into the corresponding compression chamber 4 at the same time. In the present embodiment, the oil spray holes 5 are divided into a first oil hole 51 and a second oil hole 52. There are two first oil holes 51 and second oil holes 52. A sealing mechanism is provided on the first oil hole 51 and the second oil hole 52. A second connecting rod 21 is provided on the static scroll plate 2. Two sealing plates 12 are fixed on the first connecting rod 13 to seal the two first oil holes 51. Two sealing plates 12 are fixed on the second connecting rod 21 to seal the two second oil holes 52. In the present embodiment, the first connecting rod 13 and the second connecting rod 21 are provided in parallel. A connecting portion 22 is constructed on the first connecting rod 13 and the second connecting rod 21. Preferably, the second elastic member 14 adopts a spring structure and is located between the two connecting portions 22. The two ends of the two elastic members 14 are respectively fixed on the two connecting parts 22, so that the first connecting rod 13 and the second connecting rod 21 are forced to approach each other through the second elastic member 14, thereby driving the blocking plate 12 to block the two first oil holes 51 and the two second oil holes 52; the ends of the first connecting rod 13 and the second connecting rod 21 respectively extend to both sides of the sliding stroke of the interference part 18. When the trigger plate 15 moves to one end of the through-slot 16, the two first oil holes 51 can be opened by the interference part 18 against the end of the first connecting rod 13 (at this time, the second connecting rod 21 does not move to block the two second oil holes 52). When the trigger plate 15 moves to the other end of the through-slot 16, the two second oil holes 52 can be opened by the interference part 18 against the end of the second connecting rod 21 (at this time, the first connecting rod 13 does not move to block the two first oil holes 51). Figure 9 shown).

[0042] Such an arrangement can utilize the circumferential movement of the orbiting scroll 3 to drive the trigger plate 15 to reciprocate. When the trigger plate 15 reciprocates to the end position of the through groove 16, it can force the first connecting rod 13 or the second connecting rod 21 to operate (overcoming the elastic force of the second elastic member 14) to open the first oil hole 51 or the second oil hole 52. When the first oil hole 51 is opened, the exhaust pipe 7 is passively opened to discharge the high-pressure gas into the buffer chamber 6; Figure 10 As shown, at this time, the trigger plate 15 moves to the upper part of the through slot 16 to open the two second oil holes 52 through the second connecting rod 21, thereby spraying cooling oil into the compression chamber 4 where the two second oil holes 52 are located (the second oil holes 52 are located at the center of the corresponding compression chamber 4). At this time, the compression chamber 4 where the second oil holes 52 are located is outside the fixed scroll 2, and the air therein needs to be continuously compressed. The cooling oil sprayed here not only plays a cooling role, but also plays a lubricating role to reduce the friction between the orbiting scroll 3 and the fixed scroll 2. Figure 10The counterclockwise circular motion of the intermediate orbiting scroll 3 drives the trigger plate 15 to move downward along the through-groove 16, so that the second connecting rod 21 is reset under the action of the second elastic member 14, thereby blocking the two second oil holes 52. When the trigger plate 15 moves below the through-groove 16, the abutment portion 18 on the trigger plate 15 abuts against the end of the first connecting rod 13 to open the two first oil holes 51, thereby spraying cooling oil into the compression chamber 4 where the two first oil holes 51 are located. At this time, the compression chamber 4 where the first oil holes 51 are located is inside the fixed scroll 2. The air therein has undergone the first half of compression and then needs to be compressed in the second half. The cooling oil sprayed here mainly plays a cooling role. Figure 10 In the figure, the linkage rod 17 is entirely located on one side of the trigger plate 15. When the orbiting scroll 3 continues to move counterclockwise in a circular motion, it can drive the trigger plate 15 to continue to move upward by an end distance. This arrangement makes the time and degree of opening of the second oil hole 52 greater than the time and degree of opening of the first oil hole 51, that is, the amount of cooling oil sprayed from the second oil hole 52 is greater than the amount of cooling oil sprayed from the first oil hole 51.

[0043] The advantage is that each compression chamber 4 can be sprayed with oil twice through the first oil hole 51 and the second oil hole 52. For the oil spraying of the first second oil hole 52, the amount of cooling oil sprayed is relatively large. In this way, when the gas pressure in the compression chamber 4 is low, more cooling oil is injected to play a cooling and lubricating role without affecting the gas compression. Then the compression chamber 4 moves toward the center of the fixed scroll 2, and part of the cooling oil adheres to the side walls of the fixed scroll 2 and the orbiting scroll 3. Until the first oil hole 51 moves relatively to the center position of the compression chamber 4, a small amount of cooling oil is replenished into the compression chamber 4 again through the second first oil hole 51 to ensure the cooling efficiency; during the circular motion of the orbiting scroll 3, the trigger plate 15 can be driven to reciprocate, and the trigger plate 15 has a certain resistance when moving to both ends of the through groove 16 (for overcoming the first elastic member 9 and the second elastic member 14), compared with the trigger plate 15 only encountering resistance at one end of the through groove 16 in the above embodiment (the trigger plate 15 can The oil injection hole 5 and the exhaust pipe 7 can be opened. In this embodiment, the resistances experienced by the trigger plate 15 and the orbiting scroll 3 are relatively balanced, that is, the circular motion of the orbiting scroll 3 in this embodiment is more stable, thereby passively forcing the first oil hole 51 and the second oil hole 52 to be opened intermittently and passively opening the exhaust pipe 7 when the compression chamber 4 moves to the center position of the fixed scroll 2, thereby improving the efficiency of the compressor in compressing air and reducing the friction and temperature between the orbiting scroll 3 and the fixed scroll 2; the second oil hole 52 can spray more cooling air first. Oil is used to spray the cooling oil required for the compression chamber 4 in advance when the volume of the compression chamber 4 is large. As the compression chamber 4 moves toward the center of the inlet scroll, the volume in the compression chamber 4 becomes smaller and the pressure becomes larger. At this time, only a small amount of cooling oil needs to be sprayed into the compression chamber 4 through the first oil hole 51 to meet the cooling needs, thereby ensuring the cooling efficiency without affecting the compression efficiency. At the same time, the two oil injection operations can also spray the cooling oil to different positions of the fixed scroll 2, effectively reducing the friction between the fixed scroll 2 and the movable scroll 3.

[0044] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A scroll-type electric compressor, comprising a main body, wherein a fixed scroll and an orbiting scroll are provided on the main body, wherein a plurality of compression chambers are formed between the fixed scroll and the orbiting scroll, wherein: The fixed scroll is provided with: An oil spray hole, which is used to spray cooling oil into the compression chamber; a blocking mechanism for blocking the oil injection hole, wherein when the orbiting scroll moves so that the oil injection hole moves relatively to the center of the compression chamber, the blocking mechanism opens the oil injection hole; The blocking mechanism comprises a blocking groove constructed on the oil inlet pipe, wherein a blocking plate for blocking the oil injection hole is slidably connected in the blocking groove; The oil injection holes and the blocking mechanism are provided in multiple groups, the fixed scroll is provided with a first connecting rod, and the multiple blocking plates are fixed to the first connecting rod; The fixed scroll is provided with a second elastic member for forcing the blocking plate to extend into the blocking groove. The fixed scroll is slidably connected to a trigger plate, and the trigger plate is drivingly connected to the orbiting scroll. The fixed scroll is provided with a through groove, the trigger plate is located on a side of the fixed scroll away from the orbiting scroll, and the trigger plate has an area larger than that of the through groove. The trigger plate is slidably connected in the through groove, and a linkage rod is hinged on the orbiting scroll, the other end of the linkage rod is hinged to the trigger plate; A resistance portion is constructed on the trigger plate, and the end of the first connecting rod extends to the sliding stroke of the resistance portion. When the trigger plate slides to one end of the through groove, the resistance portion resists the end of the first connecting rod, so that the first connecting rod overcomes the elastic force of the second elastic member and drives multiple blocking plates to move out of the corresponding blocking grooves, thereby synchronously opening multiple oil spray holes to spray cooling oil to the center position of the corresponding compression chamber.

2. A scroll electric compressor according to claim 1, characterized in that: The main body is provided with a buffer chamber, the fixed scroll is configured with an exhaust pipe communicating with the buffer chamber, the exhaust pipe is provided with a baffle, and the fixed scroll is provided with a first elastic member for forcing the baffle to block the exhaust pipe.

3. A scroll electric compressor according to claim 2, characterized in that: An oil inlet pipe is provided in the buffer chamber, and one end of the oil inlet pipe is communicated with the oil injection hole.

4. A scroll electric compressor according to claim 2, characterized in that: A square frame is configured on the first connecting rod, and a wedge surface is configured on the square frame.

5. The scroll electric compressor according to claim 4, characterized in that: When the movable scroll drives the trigger plate to move to one end of the through groove, the oil injection holes are respectively located at the center of the corresponding compression chambers, and the trigger plate contacts the first connecting rod to force the blocking plate to open the oil injection holes. At the same time, the square frame forces the baffle to move away from the exhaust pipe through the wedge surface.

6. The scroll electric compressor according to claim 1, characterized in that: The oil injection hole includes a first oil hole and a second oil hole.

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