Scroll type electric compressor

Abstract

The invention discloses a scroll type electric compressor, and relates to the technical field of compressors, the scroll type electric compressor comprises a main body, the main body is provided with a static scroll plate and a dynamic scroll plate, a plurality of compression cavities are formed between the static scroll plate and the dynamic scroll plate, and the static scroll plate is provided with an oil injection hole and a plugging mechanism; the oil spraying hole is used for spraying cooling oil into the compression cavity; and the plugging mechanism is used for plugging the oil injection hole, and when the movable scroll plate moves to enable the oil injection hole to relatively move to the center position of the compression cavity, the plugging mechanism opens the oil injection hole. According to the scroll type electric compressor provided by the invention, when the movable scroll plate moves to the designated position on the static scroll plate to enable the oil injection hole to be located in the center position of the corresponding compression cavity, the oil injection hole is opened through the plugging mechanism to spray cooling oil into the compression cavity, so that oil injection cooling operation can be accurately performed on the compression cavity; the cooling oil is prevented from being sprayed on the side wall of the movable scroll plate to influence the cooling efficiency.

Description

Technical Field

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

[0002] The scroll compressor is a compressor with compressible volume, which is composed of a fixed involute scroll and an eccentrically rotating involute scroll. The gas is sucked into the periphery of the static disk, and as the eccentric shaft rotates, the gas is gradually compressed in the several crescent-shaped compression chambers formed by the meshing of the dynamic and static disks, and then continuously discharged from the axial hole of the central component of the static disk.

[0003] For example, the patent document with the authorization announcement number CN117662477B and the authorization announcement date April 16, 2024, and the name of which is "A patent document with the oil injection cooling structure for a closed scroll compressor for helium", has an oil injection assembly including an oil inlet channel arranged inside a stationary scroll plate, wherein the oil inlet channel is connected with 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 movable 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 movable 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 movable scroll, that is, it is impossible to spray the cooling oil accurately to the center 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 type 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 comprises a main body, on which a fixed scroll and a movable scroll are arranged, a plurality of compression chambers are formed between the fixed scroll and the movable scroll, and on which the fixed scroll is arranged:

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

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

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

[0011] In the above-mentioned scroll electric compressor, an oil inlet pipe is arranged 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 comprises 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 drivingly connected to the movable 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 movable 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 movable 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, and the trigger plate contacts the first connecting rod to force the sealing plate to open the oil injection hole. 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 scheme, the present invention provides a scroll electric compressor. When the movable scroll plate moves to a specified position on the fixed scroll plate so that the oil injection hole is located at the center position of the corresponding compression chamber, the oil injection hole is opened by a sealing mechanism to spray cooling oil into the compression chamber. In this way, the compression chamber can be accurately cooled by oil injection, and the cooling oil can be avoided as much as possible from spraying onto the side wall of the movable scroll plate 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 drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded 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 diagram of the structure of a buffer chamber provided in yet another embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a movable 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 by yet another embodiment of the present invention;

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

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

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

[0030] Fig.10 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. Moving 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. Resistance 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 a movable scroll 3 are arranged, a plurality of compression chambers 4 are formed between the fixed scroll 2 and the movable scroll 3, and an oil spray hole 5 and a blocking mechanism are arranged on the fixed scroll 2; the oil spray hole 5 is used to spray cooling oil into the compression chamber 4; the blocking mechanism is used to block the oil spray hole 5, and when the movable scroll 3 moves to make the oil spray hole 5 relatively move to the center position of the compression chamber 4, the blocking 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-self-rotation structure is also provided in the main body 1, so that the movable scroll 3 can move in a circle on the fixed scroll 2 without rotating itself, thereby forming a plurality of compression chambers 4 between the fixed 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 prior arts 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 arranged 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 arranged 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 position relative to the center 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 to affect 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 fixed 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 fixed scroll 2. Specifically, the exhaust pipe 7 is located at the center of the fixed scroll 2. During the circular motion of the movable scroll 3 relative to the fixed scroll 2, the air in the compression chamber 4 is compressed and gradually moves to the center of the fixed scroll 2 until the compression chamber 4 is connected to the exhaust pipe 7, and 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 to between the fixed 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, a bracket 10 is constructed on the inner wall of the exhaust pipe 7, and the bracket 10 does not affect the flow of gas in the exhaust pipe 7. The first elastic member 9 can select a 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 circular motion of the movable scroll 3, and then the intermittently discharged high-pressure air can be buffered through the buffer chamber 6, and then the gas can be discharged through the pipeline arranged on the buffer chamber 6.

[0037] As an alternative to the electromagnetic valve structure used in the above-mentioned sealing mechanism, preferably, 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 the 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 scroll 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 the sealing plate 12 is extended into the sealing groove. When blocking the groove, the connection between the oil inlet pipe 11 and the oil injection 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 injection hole 5 is opened to spray cooling oil into the compression chamber 4. With such a configuration, a linear driving 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 injection 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 plate 2 is provided with a first connecting rod 13, and the multiple blocking plates 12 are fixed to the first connecting rod 13. Specifically, as 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 the multiple compression chambers 4 through the 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 fixed to the first connecting rod 13. In this way, a linear drive structure is set on the fixed scroll 2 to synchronously drive the 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 blocking plate 12 to extend into the blocking groove, and a trigger plate 15 is slidably connected to the fixed scroll 2, and the trigger plate 15 is transmission-connected to the movable scroll 3. A through groove 16 is constructed on the fixed scroll 2, and the trigger plate 15 is located on the side of the fixed scroll 2 away from the movable scroll 3, and the area of ​​the trigger plate 15 is larger than the area of ​​the through groove 16, and the trigger plate 15 is slidably connected in the through groove 16, and a linkage rod 17 is hinged on the movable scroll 3, and the other end of the linkage rod 17 is hinged 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 use a spring structure in the prior art, one end of which is fixed to the fixed scroll plate 2, and the other end is fixed to the first connecting rod 13, so that the first connecting rod 13 is forced to move to one side by the spring, thereby driving the multiple blocking plates 12 to extend into the corresponding blocking grooves respectively, and then blocking the multiple oil injection holes 5 (such as Figure 5The 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 movable scroll 3, and the other end extends into the through groove 16 and is hinged to the trigger plate 15. When the movable 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 part 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 part 18. When the trigger plate 15 slides to one end of the through groove 16, the resistance part 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 square frame 19 moves with the first connecting rod 13, the exhaust pipe 7 moves relatively in the frame 19; the wedge-shaped surfaces 20 are constructed on both opposite sides of the frame 19, and when the frame 19 moves with the first connecting rod 13, the baffle 8 on the exhaust pipe 7 can be resisted by the two wedge-shaped surfaces 20, 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 movable scroll 3, until the trigger plate 15 drives the first connecting rod 13 to operate to open the oil injection hole 5, and 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, so that the high-pressure air in the compression chamber 4 located at the center of the fixed scroll 2 is discharged into the buffer chamber 6. In this way, when the movable scroll 3 drives the trigger plate 15 to move to one end of the through groove 16, the oil injection holes 5 are respectively located at the center of the corresponding compression chamber 4, and 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 to stay 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 thus improving the compression efficiency; in this way, the exhaust pipe 7 can be intermittently opened while the plurality of oil injection holes 5 are intermittently opened, so that the high-pressure air can be discharged after being buffered in the buffer chamber 6.

[0041] In another embodiment provided by the present invention, as an alternative to the synchronous injection of the plurality of injection holes 5, the injection hole 5 further comprises a first oil hole 51 and a second oil hole 52 ( Fig.10In the embodiment, four oil spray holes 5 are arranged on the fixed 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, a plurality of oil spray holes 5 can be arranged 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 the first oil hole 51 and the second oil hole 52. The first oil hole 51 and the second oil hole 52 are both arranged with two each. The first oil hole 51 and the second oil hole 52 are both provided with a blocking mechanism. The fixed scroll plate 2 is provided with a second connecting rod 21. Two blocking plates 12 are fixed on the first connecting rod 13 to block the two first oil holes 51. Two blocking plates 12 are fixed on the second connecting rod 21 to block the two second oil holes 52. In the present embodiment, the first connecting rod 13 and the second connecting rod 21 are arranged in parallel. The first connecting rod 13 and the second connecting rod 21 are both constructed with a connecting portion 22. 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 extend to the two sides of the sliding stroke of the abutment part 18 respectively, and 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 abutment 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 abutment 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, as shown in FIG. 2 ). Fig. 9 shown).

[0042] Such an arrangement can utilize the circular motion of the movable scroll 3 to drive the trigger plate 15 to reciprocate, and 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, and 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; Fig.10 As shown, at this time, the trigger plate 15 moves to the top 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 (at this time, the second oil hole 52 is located at the center of the corresponding compression chamber 4). At this time, the compression chamber 4 where the second oil hole 52 is located is outside the fixed scroll 2, and the air inside it 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 movable scroll 3 and the fixed scroll 2; Fig.10The counterclockwise circular motion of the middle movable scroll 3 will drive 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, until the trigger plate 15 moves to the bottom of the through groove 16, and 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 on the inner side of the fixed scroll 2, and the air therein is compressed in the first half, and then needs to be compressed in the second half. The cooling oil sprayed here mainly plays a cooling role; Fig.10 In the figure, the linkage rod 17 is located as a whole on one side of the trigger plate 15, and can drive the trigger plate 15 to continue to move upward a distance when the movable scroll 3 continues to move counterclockwise in a circular motion. In this way, the opening time and degree of the second oil hole 52 are greater than the opening time and degree of the first oil hole 51, that is, the amount of cooling oil sprayed in the second oil hole 52 is greater than the amount of cooling oil sprayed in 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 first oil hole 52, the amount of cooling oil sprayed is relatively large. In this way, more cooling oil is injected when the gas pressure in the compression chamber 4 is low, so as 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 movable scroll 3 until the first oil hole 51 moves relatively to the center of the compression chamber 4. Then, a small amount of cooling oil is added to the compression chamber 4 again through the second first oil hole 51 to ensure the cooling efficiency; during the circular motion of the movable scroll 3, the trigger plate 15 can be driven to reciprocate, and the trigger plate 15 has a certain resistance when it moves to both ends of the through groove 16 (used to overcome the first elastic member 9 and the second elastic member 14), compared with the trigger plate 15 in the above embodiment that only encounters resistance at one end of the through groove 16 (the trigger plate 15 in the above embodiment can move to one end of the through groove 16). The trigger plate 15 and the movable scroll 3 are subjected to relatively balanced resistance, that is, the circular motion of the movable scroll 3 is more stable, thereby passively forcing the first oil hole 51 and the second oil hole 52 to open intermittently and passively open the exhaust pipe 7 when the compression chamber 4 moves to the center of the fixed scroll 2, thereby improving the efficiency of the compressor in compressing air and reducing the friction and temperature between the movable 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 of 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 only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A scroll type electric compressor, comprising a main body, on which a fixed scroll and an orbiting scroll are arranged, and a plurality of compression chambers are formed between the fixed scroll and the orbiting scroll, characterized in that: The fixed scroll disk is provided with: An oil spray hole, which is used to spray cooling oil into the compression chamber; The plugging mechanism is used to plug the oil injection hole. When the movable scroll moves to make the oil injection hole relatively move to the center position of the compression chamber, the plugging mechanism opens the oil injection hole.

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 provided with an exhaust pipe connected 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 arranged 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 3, characterized in that: The blocking mechanism comprises 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.

5. A scroll electric compressor according to claim 4, characterized in that: The oil injection holes and the sealing mechanism are provided in multiple groups, a first connecting rod is provided on the fixed scroll plate, and multiple sealing plates are fixed to the first connecting rod.

6. A scroll electric compressor according to claim 5, characterized in that: 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 drivingly connected to the movable scroll.

7. A scroll electric compressor according to claim 6, characterized in that: A through groove is constructed on the fixed scroll disk, the trigger plate is located on the side of the fixed scroll disk away from the movable scroll disk, 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 movable scroll disk, and the other end of the linkage rod is hinged to the trigger plate.

8. A scroll electric compressor according to claim 7, characterized in that: A square frame is configured on the first connecting rod, and a wedge-shaped surface is configured on the square frame.

9. A scroll electric compressor according to claim 8, 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.

10. 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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