An electric compressor

Abstract

The present invention relates to the technical field of electric compressors, and specifically to an electric compressor, comprising an electric compressor body, wherein the electric compressor body comprises a drive motor, a compressor, and a transmission shaft rotatably arranged on the electric compressor body for connecting the drive motor and the compressor, wherein the drive motor is provided with a power storage component, and the drive motor is provided with a reduction component. When the device is working normally, the transmission shaft drives the power storage component to work to store power, and then when the device is started, the power storage component is directly docked and released with the transmission shaft by switching the docking component, thereby assisting the start-up of the drive motor, so that the drive motor does not need to work under high load, thereby improving the life of the device; when the power storage component is storing power, the transmission shaft is docked with the rotating ring through the reduction component, thereby reducing the load of the drive motor, and at the same time, the power storage component can also accumulate a large amount of power.

Description

Technical Field

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

[0002] Electric compressors achieve efficient, precise, and environmentally friendly gas compression solutions by combining electric drive with high-efficiency compression technology. Specifically, electric compressors adopt an integrated direct-drive design. The output shaft of its drive motor and the compressor shaft are directly connected coaxially through a rigid connection, completely eliminating intermediate transmission components (such as belts and gears), thereby achieving lossless power transmission. This structure reduces the size of the equipment by more than 30%, while highly integrating the motor, compressor, and transmission module in a compact space, combining the advantages of high power density and space utilization.

[0003] Because the output shaft of the drive motor and the compressor shaft adopt a coaxial direct connection design, when the electric compressor starts, if its load is large (such as high back pressure conditions or inertia load at the moment of startup), the motor needs to directly overcome the static friction and compression reaction force of the compressor rotor. This unbuffered direct drive characteristic can easily lead to a surge in starting current, which may trigger overcurrent protection and cause startup failure, or affect the service life of the electric compressor. For this reason, we propose an electric compressor. Summary of the Invention

[0004] In order to solve the above technical problems, an embodiment of the present application provides an electric compressor, including an electric compressor body, the electric compressor body including a drive motor, a compressor, and a transmission shaft rotatably arranged on the electric compressor body, for connecting the drive motor and the compressor, a power storage component is provided on the drive motor, and a reduction component is provided on the drive motor, the power storage component is connected to the drive shaft through the reduction component, and is used for the drive shaft to drive the power storage component to store power through the reduction component when the device is working normally, wherein the reduction component is configured to reduce the load torque transmitted from the drive shaft to the power storage component, and a switching docking component connected to the power storage component is provided on the drive motor, which is used for starting the drive motor so that the power storage component is directly docked with the drive shaft and released, thereby driving the drive shaft to rotate at the same time.

[0005] In some embodiments, one end of the drive motor is fixedly connected to an annular housing, and the compressor is fixedly connected to the drive motor through the annular housing;

[0006] The power storage assembly includes a rotating ring rotatably connected to the inner wall of the annular shell. A coil spring is arranged in the rotating ring, with two ends respectively fixedly connected to the rotating ring and the shell of the driving motor.

[0007] In some embodiments, the reduction assembly includes a first gear plate disposed on the transmission shaft, the first shaft being rotatably connected to the annular housing, a second gear plate meshing with the first gear plate being fixedly connected to one end of the first shaft, a plurality of tooth protrusions meshing with the second gear plate being evenly and equidistantly fixedly connected to the rotating ring, and the diameter of the rotating ring is larger than the diameter of the first gear plate, so that when the transmission shaft rotates, the rotation speed of the rotating ring is lower than the rotation speed of the transmission shaft;

[0008] A disengagement member connected to the first toothed disc is provided in the annular housing, and is used to drive the first toothed disc to move and then be disconnected from the transmission shaft;

[0009] A locking piece connected to the second gear disc is provided in the annular housing and is used to lock the second gear disc when the first gear disc is separated from the transmission shaft.

[0010] In some embodiments, the disengagement member includes an annular groove provided on the transmission shaft, a sliding protrusion is fixedly connected to the toothed disc, a sliding groove connected to the annular groove is provided on the transmission shaft, one end of the sliding protrusion is located in the sliding groove and is slidably connected to the inner wall of the sliding groove, a hollow tube is sleeved on the transmission shaft, one end of the hollow tube is located in the toothed disc and is rotatably connected to the toothed disc, an electric push rod connected to the hollow tube is fixedly connected to the drive motor, and the electric push rod is started to drive the sliding protrusion to move into the annular groove.

[0011] In some embodiments, the locking member includes a friction tube fixedly connected to one side of the second gear disc, a circular ring fixedly connected to one end of the friction tube, an arc-shaped friction plate slidingly connected between the circular ring and the second gear disc, a sliding ring fixedly connected to one end of the hollow tube, a rectangular plate fixedly connected to the sliding ring, a connecting rod rotatably connected between the rectangular plate and the arc-shaped friction plate via a rotating shaft, and the hollow tube is moved to use the connecting rod to push the arc-shaped friction plate tightly against the friction tube to lock the second gear disc.

[0012] In some embodiments, a guide rod is fixedly connected to the sliding ring, a strip plate is fixedly connected to the annular shell, one end of the strip plate is fixedly connected to a hollow cylinder, one end of the guide rod is located in the hollow cylinder and is slidably connected to its inner wall, for guiding and limiting the movement of the sliding ring.

[0013] In some embodiments, the switching docking assembly includes a friction ring arranged in a rotating ring, a connecting plate is fixedly connected between the friction ring and the rotating ring, and one end of the sliding ring is rotatably connected to a hollow shaft three, the hollow shaft three is connected to the transmission shaft, a friction circular plate is fixedly connected to the hollow shaft three, and a ring body two rotatably connected to the friction circular plate is fixedly connected to the protruding end of the electric push rod. After the electric push rod is started, the friction circular plate is driven to move and contact the friction ring. During this process, the connecting rod first drives the arc-shaped friction plate close to the friction tube, and then drives the arc-shaped friction plate away from the friction tube.

[0014] In some embodiments, a ratchet and ratchet assembly is provided between the hollow shaft three and the transmission shaft, a sliding protrusion 2 is fixedly connected to the outer shell of the ratchet and ratchet assembly, a sliding groove 2 is provided on the inner wall of the hollow shaft three, and one end of the sliding protrusion 2 is located in the sliding groove 2 and is slidably connected to its inner wall.

[0015] In some embodiments, a mounting bracket is fixedly connected inside the annular shell, and a magnetoelectric speed sensor with a detection head facing the second gear disc is fixedly connected to the mounting bracket for monitoring the second gear disc, and the magnetoelectric speed sensor is electrically connected to the controller of the electric push rod.

[0016] In some embodiments, one end of the toothed disc is rotatably connected to the ring body one, and the hollow tube is provided with a tension spring whose two ends are respectively fixedly connected to the movable ring and the ring body one.

[0017] The present invention has at least the following beneficial effects:

[0018] 1. This device uses the transmission shaft to drive the power storage component to store power during normal operation. Then, when starting the device, the docking component is switched to allow the power storage component to directly dock with the transmission shaft and release the power, thereby assisting the drive motor in starting. This allows the drive motor to work without high load and improves the life of the device.

[0019] 2. When the power storage component of this device is storing power, the transmission shaft is docked with the rotating ring through the reduction component, thereby reducing the load of the drive motor and allowing the power storage component to accumulate greater power.

[0020] 3. When the power storage component of this device is storing power, the number of rotations of the second gear disc can be detected by cooperating with the magnetoelectric speed sensor through the second gear disc and the magnetoelectric speed sensor, thereby monitoring the power storage level of the power storage component in real time. When the specified level is reached, the electric push rod is controlled by the program to disconnect the connection between the first gear disc and the transmission shaft to avoid excessive power storage and damage to the device body; conversely, when the power storage component releases power to cooperate with the drive motor to drive the transmission shaft to rotate, the rotation speed of the transmission shaft can be monitored. When its rotation speed reaches the target value, the electric push rod is also controlled by the program to disconnect the connection between the power storage component and the transmission shaft, thereby avoiding additional release of power of the power storage component and reducing energy consumption of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the local cross-section structure;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the local cross-section structure;

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of the local cross-section structure;

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the local cross-section structure;

[0027] Figure 7 This is a structural diagram of the transmission shaft of the present invention;

[0028] Figure 8 This is a structural diagram of Example 2 of the present invention.

[0029] In the figure: 1-electric compressor body; 11-driving motor; 12-compressor; 2-drive shaft; 3-power storage assembly; 4-speed reduction assembly; 5-switching docking assembly; 31-annular housing; 32-rotating ring; 33-coil spring; 34-toothed disc 1; 35-shaft 1; 36-toothed disc 2; 37-toothed protrusion; 38-disengagement member; 39-locking member; 41-annular groove; 42-sliding protrusion 1; 43-sliding groove 1; 44-hollow tube; 45-electric push rod; 4 6-friction tube; 47-circular ring; 48-arc-shaped friction plate; 49-sliding ring; 51-rectangular plate; 52-connecting rod; 53-guide rod; 54-strip plate; 55-hollow cylinder; 56-friction ring; 57-connecting plate; 58-hollow shaft three; 59-friction circular plate; 61-ring body two; 62-ratchet ratchet assembly; 63-sliding protrusion two; 64-sliding groove two; 65-mounting frame; 66-magnetoelectric speed sensor; 67-ring body one; 68-tension spring. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1-Figure 7 The present invention provides a technical solution: an electric compressor, comprising an electric compressor body 1, the electric compressor body 1 comprising a drive motor 11, a compressor 12, and further comprising:

[0032] A transmission shaft 2 is rotatably mounted on the electric compressor body 1 , one end of the transmission shaft 2 being fixedly connected to the output shaft of the drive motor 11 , and the other end being fixedly connected to the drive shaft of the compressor 12 , thereby connecting the drive motor 11 and the compressor 12 ;

[0033] The power storage assembly 3 is provided on the drive motor 11, and the drive motor 11 is provided with a reduction assembly 4. The power storage assembly 3 is connected to the transmission shaft 2 through the reduction assembly 4. When the device is operating normally, the drive motor 11 drives the transmission shaft 2 to rotate, and the transmission shaft 2 drives the power storage assembly 3 to store power through the reduction assembly 4. The reduction assembly 4 is configured to reduce the load torque transmitted from the transmission shaft 2 to the power storage assembly 3.

[0034] The switching docking assembly 5 is provided on the drive motor 11 and connected to the power storage assembly 3. When the drive motor 11 is started, the power storage assembly 3 is directly docked with the transmission shaft 2 and released, thereby driving the transmission shaft 2 to rotate at the same time.

[0035] Specifically, the device uses the transmission shaft 2 to drive the power storage assembly 3 to work and store power during normal operation. Then, when the device is started, the docking assembly 5 is switched to allow the power storage assembly 3 to directly dock with the transmission shaft 2 and release the power, thereby assisting the start of the drive motor 11. This eliminates the need for the drive motor 11 to work at high load, thereby improving the life of the device.

[0036] At the same time, when the power storage component 3 is storing power, the transmission shaft 2 is docked with the rotating ring 32 through the deceleration component 4, thereby reducing the load of the drive motor 11 and allowing the power storage component 3 to accumulate greater power.

[0037] At the same time, when the force storage component 3 is storing force, the number of rotations of the gear disc 2 36 can be detected through the cooperation of the gear disc 2 36 and the magnetoelectric speed sensor 66, so as to monitor the degree of force storage of the force storage component 3 in real time. When the specified degree is reached, the electric push rod 45 is controlled by the program to disconnect the connection between the gear disc 1 34 and the transmission shaft 2, so as to avoid excessive force storage and damage to the device body. On the contrary, when the force storage component 3 releases power to cooperate with the drive motor 11 to drive the transmission shaft 2 to rotate, the rotation speed of the transmission shaft 2 can be monitored. When its rotation speed reaches the target value, the electric push rod 45 is also controlled by the program to disconnect the connection between the force storage component 3 and the transmission shaft 2, so as to avoid the additional release of power of the force storage component 3 and reduce the energy consumption of the device.

[0038] One end of the drive motor 11 is fixedly connected to an annular housing 31, and the compressor 12 is fixedly connected to the drive motor 11 through the annular housing 31, thereby making the appearance of the device body form an integral whole and relatively regular;

[0039] The power storage assembly 3 includes a rotating ring 32 rotatably connected to the inner wall of the annular housing 31 . A coil spring 33 is provided in the rotating ring 32 , with two ends fixedly connected to the rotating ring 32 and the housing of the drive motor 11 respectively.

[0040] The reduction assembly 4 includes a gear disc 1 34 provided on the transmission shaft 2, a shaft 1 35 being rotatably connected to the annular housing 31, a gear disc 2 36 being fixedly connected at one end of the shaft 1 35 to mesh with the gear disc 1 34, and a plurality of tooth protrusions 37 being evenly and equidistantly fixedly connected to the rotating ring 32 to mesh with the gear disc 2 36, and the diameter of the rotating ring 32 is larger than the diameter of the gear disc 1 34, so that when the transmission shaft 2 rotates, the rotation speed of the rotating ring 32 is lower than the rotation speed of the transmission shaft 2. Specifically, when storing force, the sliding protrusion 1 42 in the gear disc 1 34 is located in the sliding groove 1 43 on the transmission shaft 2. At this time, the rotation of the transmission shaft 2 drives the gear disc 1 34 to rotate, thereby driving the gear disc 2 36 to rotate, and then driving the rotating ring 32 to rotate, thereby accumulating energy through the deformation of the disc spring 33 to complete the force storage work. In this process, since the diameter of the gear disc 1 34 is much smaller than the rotating ring 32, only a small force is required when the transmission shaft 2 rotates to store force in the disc spring 33, thereby reducing the load on the drive motor 11 when storing force.

[0041] A disengagement member 38 connected to the toothed disc 1 34 is provided in the annular housing 31, and is used to drive the toothed disc 1 34 to disengage from the transmission shaft 2 after movement. The disengagement member 38 includes an annular groove 41 provided on the transmission shaft 2, a sliding protrusion 1 42 is fixedly connected to the toothed disc 1 34, and a sliding groove 1 43 connected to the annular groove 41 is provided on the transmission shaft 2. One end of the sliding protrusion 1 42 is located in the sliding groove 1 43 and is slidably connected to the inner wall of the sliding groove 43. A hollow tube 44 is sleeved on the transmission shaft 2, and one end of the hollow tube 44 is located in the toothed disc 1 34 and is rotatably connected to the same. An electric push rod 45 connected to the hollow tube 44 is fixedly connected to the drive motor 11. When the electric push rod 45 is started, the sliding protrusion 1 42 is driven to move into the annular groove 41.

[0042] Specifically, when the coil spring 33 has completed its power storage, the electric push rod 45 is activated to drive the hollow tube 44 to move, thereby driving the gear plate 1 34 to move relative to the transmission shaft 2, so that the sliding protrusion 1 42 disengages from the sliding groove 1 43 and moves into the annular groove 41, thereby completing the separation operation of the gear plate 1 34 from the transmission shaft 2;

[0043] A locking member 39 connected to the second gear disc 36 is provided in the annular housing 31 and is used to lock the second gear disc 36 when the first gear disc 34 is disengaged from the transmission shaft 2. The locking member 39 includes a friction tube 46 fixedly connected to one side of the second gear disc 36. A circular ring 47 is fixedly connected to one end of the friction tube 46. An arc-shaped friction plate 48 is slidably connected between the circular ring 47 and the second gear disc 36. A sliding ring 49 is fixedly connected to one end of the hollow tube 44. A rectangular plate 51 is fixedly connected to the sliding ring 49. A connecting rod 52 is rotatably connected between the rectangular plate 51 and the arc-shaped friction plate 48 via a rotating shaft. The hollow tube 44 is moved to use the connecting rod 52 to push the arc-shaped friction plate 48 tightly against the friction tube 46 to lock the second gear disc 36.

[0044] Specifically, when the device is in the power storage state, the gear disc 1 34 is connected to the transmission shaft 2, and the arc-shaped friction plate 48 is in a state away from the friction tube 46, and the connecting rod 52 is in an inclined state. When the power storage is completed, the electric push rod 45 is started to drive the gear disc 1 34 to disengage from the transmission shaft 2, while driving the sliding ring 49 and the rectangular plate 51 to move, thereby driving the connecting rod 52 to deflect, and then pushing the arc-shaped friction plate 48 toward the friction tube 46. When the gear disc 1 34 is completely separated from the transmission shaft 2, the connecting rod 52 is in a state perpendicular to the axis of the transmission shaft 2, and the arc-shaped friction plate 48 is also tightly pressed against the friction tube 46 and locked by friction.

[0045] A guide rod 53 is fixedly connected to the sliding ring 49, a strip plate 54 is fixedly connected to the annular shell 31, one end of the strip plate 54 is fixedly connected to a hollow cylinder 55, one end of the guide rod 53 is located in the hollow cylinder 55 and is slidably connected to its inner wall, which is used to guide and limit the movement of the sliding ring 49 to improve the stability of the device during operation.

[0046] The switching docking assembly 5 includes a friction ring 56 disposed within the rotating ring 32. A connecting plate 57 is fixedly connected between the friction ring 56 and the rotating ring 32. A hollow shaft 3 58 is rotatably connected to one end of the sliding ring 49. The hollow shaft 3 58 is connected to the transmission shaft 2. A friction circular plate 59 is fixedly connected to the hollow shaft 3 58. A ring body 2 61 rotatably connected to the friction circular plate 59 is fixedly connected to the extended end of the electric push rod 45.

[0047] Specifically, before the device stops working, the disc spring 33 is already in a state of storing force. At this time, the arc-shaped friction plate 48 is in a state of being tightly against the friction tube 46, and the gear plate 1 34 is in a state of being separated from the transmission shaft 2. At this time, if the device body is to be started, the electric push rod 45 is first started to work, driving the friction circular plate 59 on the hollow shaft 3 58 to move and contact and resist against the friction ring 56. During this process, the sliding ring 49 and the rectangular plate 51 move, driving the connecting rod 52 to deflect and tilt, thereby driving the arc-shaped friction plate 48 to disengage from the friction tube 46 again, and then releasing the lock on the gear plate 2 36, that is, the disc spring 33, and then starting the drive motor 11. At the same time, the disc spring 33 releases energy to drive the rotating ring 32 and the friction ring 56 to rotate. The friction ring 56 drives the friction circular plate 59 to rotate through friction force, and then drives the transmission shaft 2 to rotate together with the drive motor 11.

[0048] A ratchet and ratchet assembly 62 is installed between the hollow shaft 3 58 and the transmission shaft 2. A sliding protrusion 2 63 is fixedly connected to the outer shell of the ratchet and ratchet assembly 62. A sliding groove 2 64 is opened on the inner wall of the hollow shaft 3 58. One end of the sliding protrusion 2 63 is located in the sliding groove 2 64 and is slidably connected to its inner wall, which is used to guide and limit the movement of the hollow shaft 3 58. At the same time, the design of the ratchet and ratchet assembly 62 allows the transmission shaft 2 to rotate normally without forcibly driving the friction disk to rotate, thereby avoiding additional energy loss.

[0049] A mounting bracket 65 is fixedly connected inside the annular housing 31, and a magnetoelectric speed sensor 66 is fixedly connected to the mounting bracket 65, with the detection head facing the second gear disc 36, for monitoring the rotation speed and number of rotations of the second gear disc 36, and the magnetoelectric speed sensor 66 is electrically connected to the controller of the electric push rod 45.

[0050] Example 2: Please refer to Figures 1-8 , the present invention provides a technical solution: Example 2 is optimized based on Example 1;

[0051] One end of the gear disc 34 is rotatably connected to the ring body 67, and the hollow tube 44 is provided with a tension spring 68 at both ends which are respectively fixedly connected to the movable ring and the ring body 67. When the electric push rod 45 is started to drive the gear disc 34 to move and dock with the transmission shaft 2, if the sliding protrusion 42 in the gear disc 34 is not aligned with the sliding groove 43, the hollow tube 44 can continue to move. At this time, the tension spring 68 will be stretched and provide downward pressure to the gear disc 34. Then, when the transmission shaft 2 rotates, once the sliding groove 43 is aligned with the sliding protrusion 42, the gear disc 34 will be driven to dock with the transmission shaft 2 through the reset of the tension spring 68, thereby improving the smoothness of the operation of the device and avoiding interference damage problems.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An electric compressor, comprising an electric compressor body (1), wherein the electric compressor body (1) comprises a drive motor (11) and a compressor (12), characterized in that: Also included are: A transmission shaft (2) rotatably mounted on the electric compressor body (1) and used to connect the drive motor (11) and the compressor (12); A power storage component (3) is provided on a driving motor (11), and a speed reduction component (4) is provided on the driving motor (11), the power storage component (3) is connected to the transmission shaft (2) via the speed reduction component (4), and is used for driving the power storage component (3) to store power via the speed reduction component (4) when the device is working normally, wherein the speed reduction component (4) is configured to reduce the load torque transmitted from the transmission shaft (2) to the power storage component (3); A switching docking assembly (5) is provided on the driving motor (11) and connected to the power storage assembly (3), and is used to enable the power storage assembly (3) to directly dock with the transmission shaft (2) and release the power storage assembly (3) when the driving motor (11) is started, thereby simultaneously driving the transmission shaft (2) to rotate; One end of the driving motor (11) is fixedly connected to an annular housing (31), and the compressor (12) is fixedly connected to the driving motor (11) via the annular housing (31); The power storage assembly (3) includes a rotating ring (32) rotatably connected to the inner wall of the annular housing (31), and a coil spring (33) is provided in the rotating ring (32), with two ends respectively fixedly connected to the rotating ring (32) and the housing of the drive motor (11); The reduction assembly (4) includes a toothed disc (34) arranged on the transmission shaft (2), a shaft (35) rotatably connected to the annular housing (31), a toothed disc (36) meshing with the toothed disc (34) fixedly connected to one end of the shaft (35), a plurality of tooth protrusions (37) meshing with the toothed disc (36) equidistantly and evenly fixedly connected to the rotating ring (32), and the diameter of the rotating ring (32) is larger than the diameter of the toothed disc (34), so that when the transmission shaft (2) rotates, the rotation speed of the rotating ring (32) is lower than the rotation speed of the transmission shaft (2); A disengagement member (38) connected to the first toothed disc (34) is provided in the annular housing (31) and is used to drive the first toothed disc (34) to move and then be disengaged from the transmission shaft (2); A locking member (39) connected to the second toothed disc (36) is provided in the annular housing (31) and is used to lock the second toothed disc (36) when the first toothed disc (34) is disengaged from the transmission shaft (2).

2. The electric compressor according to claim 1, characterized in that: The disengaging member (38) includes an annular groove (41) provided on the transmission shaft (2), a sliding protrusion (42) is fixedly connected to the toothed disc (34), a sliding groove (43) connected to the annular groove (41) is provided on the transmission shaft (2), one end of the sliding protrusion (42) is located in the sliding groove (43) and is slidably connected to the inner wall of the sliding groove, a hollow tube (44) is sleeved on the transmission shaft (2), one end of the hollow tube (44) is located in the toothed disc (34) and is rotatably connected to the toothed disc, an electric push rod (45) connected to the hollow tube (44) is fixedly connected to the driving motor (11), and the electric push rod (45) is started to drive the sliding protrusion (42) to move into the annular groove (41).

3. The electric compressor according to claim 2, characterized in that: The locking member (39) includes a friction tube (46) fixedly connected to one side of the second gear disc (36), a circular ring (47) fixedly connected to one end of the friction tube (46), an arc-shaped friction plate (48) slidably connected between the circular ring (47) and the second gear disc (36), a sliding ring (49) fixedly connected to one end of the hollow tube (44), a rectangular plate (51) fixedly connected to the sliding ring (49), a connecting rod (52) rotatably connected between the rectangular plate (51) and the arc-shaped friction plate (48) via a rotating shaft, and the hollow tube (44) is moved to push the arc-shaped friction plate (48) against the friction tube (46) using the connecting rod (52) to lock the second gear disc (36).

4. The electric compressor according to claim 3, characterized in that: The sliding ring (49) is fixedly connected to a guide rod (53), the annular housing (31) is fixedly connected to a strip plate (54), one end of the strip plate (54) is fixedly connected to a hollow cylinder (55), and one end of the guide rod (53) is located in the hollow cylinder (55) and is slidably connected to the inner wall thereof, for guiding and limiting the movement of the sliding ring (49).

5. The electric compressor according to claim 4, characterized in that: The switching docking assembly (5) includes a friction ring (56) arranged in a rotating ring (32), a connecting plate (57) is fixedly connected between the friction ring (56) and the rotating ring (32), and one end of the sliding ring (49) is rotatably connected to a hollow shaft three (58), the hollow shaft three (58) is connected to the transmission shaft (2), a friction circular plate (59) is fixedly connected to the hollow shaft three (58), and a ring body two (61) rotatably connected to the friction circular plate (59) is fixedly connected to the extended end of the electric push rod (45). After the electric push rod (45) is started, the friction circular plate (59) is driven to move and contact the friction ring (56). During this process, the connecting rod (52) first drives the arc-shaped friction plate (48) close to the friction tube (46), and then drives the arc-shaped friction plate (48) away from the friction tube (46).

6. The electric compressor according to claim 5, characterized in that: A ratchet and ratchet assembly (62) is provided between the hollow shaft (58) and the transmission shaft (2), a second sliding protrusion (63) is fixedly connected to the outer shell of the ratchet and ratchet assembly (62), a second sliding groove (64) is provided on the inner wall of the hollow shaft (58), and one end of the second sliding protrusion (63) is located in the second sliding groove (64) and is slidably connected to the inner wall thereof.

7. The electric compressor according to claim 6, characterized in that: A mounting frame (65) is fixedly connected inside the annular housing (31), and a magnetoelectric speed sensor (66) with a detection head facing the second gear disc (36) is fixedly connected to the mounting frame (65) for monitoring the second gear disc (36), and the magnetoelectric speed sensor (66) is electrically connected to the controller of the electric push rod (45).

8. The electric compressor according to claim 7, characterized in that: One end of the toothed disc 1 (34) is rotatably connected to a ring body 1 (67), and a tension spring (68) is sleeved on the hollow tube (44), with two ends respectively fixedly connected to the movable ring and the ring body 1 (67).

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