Dual-power compressor and control method thereof

Abstract

The present invention discloses a dual-power compressor and a control method thereof, which belongs to the technical field of compressors. The dual-power compressor includes a compressor housing, a belt mechanism, an end cover, and a compression mechanism disposed in the compressor housing for compressing a fluid by means of rotational motion, a rotating drive shaft connected to the compression mechanism, and a motor mechanism penetrating the rotating drive shaft; the compression mechanism is connected to the belt mechanism through the rotating drive shaft passing through the motor mechanism; wherein the motor mechanism is connected to the rotating drive shaft through a bearing sleeve assembly including a one-way bearing and a bearing sleeve. The dual-power compressor of the present invention reduces the installation space on the basis of realizing free switching between two driving modes by using a common set of scroll plates for the pulley and the motor, and further realizes the technical effect of lightweighting the air-conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a dual-power compressor and a control method thereof. Background Art

[0002] The existing air conditioning compressor for fuel vehicles is mechanically driven by a pulley and can only work when the engine is running. When the vehicle is parked, the vehicle is turned off to save fuel or reduce engine noise, which leads to the problem that the air conditioning cannot be used for cooling when the engine is stopped. In the prior art, there is a dual-power compressor that uses a pair of scroll plates shared by the electric motor and the internal combustion engine in the vehicle to solve the above problem.

[0003] The prior art discloses a deceleration clutch mechanism and a motor transmission device for an electric dual-drive automobile air-conditioning compressor (application number 2020216552489), including a compressor housing, a pulley, an end cover, and a planetary gear reducer, a ratchet clutch, a motor, and a scroll compression mechanism arranged in the compressor housing; and also includes a control system for controlling the pulley, the motor, and the scroll compression mechanism; wherein the motor is coaxially arranged with the planetary gear reducer, the ratchet clutch, and the compressor main shaft; the output end of the pulley is connected to the compressor main shaft; and the output end of the motor is connected to the compressor main shaft through the planetary gear reducer and the ratchet clutch. Although the motor and the pulley share the same compressor mechanism, the effect of lightweight and saving installation space is achieved, there is still a disadvantage of using a transmission structure with complex structures such as a planetary gear reducer and a ratchet, which leads to an increased probability of failure.

[0004] Therefore, there is an urgent need for a dual-power compressor with a more reasonable design, low failure rate, high stability and lighter weight. Summary of the invention

[0005] The object of the present invention is to provide a dual-power compressor and a control method thereof, wherein the dual-power compressor has the characteristics of more reasonable design, low failure rate, high stability and lighter weight.

[0006] In order to achieve the above-mentioned object, the present invention provides a dual-power compressor including a compressor housing, a belt mechanism, an end cover, a compression mechanism disposed in the compressor housing for compressing a fluid by means of a rotational motion, a rotational drive shaft connected to the compression mechanism, and a motor mechanism penetrating the rotational drive shaft;

[0007] The compression mechanism is connected to the belt mechanism through a rotating drive shaft passing through the motor mechanism; wherein the motor mechanism is connected to the rotating drive shaft through a bearing sleeve assembly including a one-way bearing and a bearing sleeve.

[0008] Further, a preferred structure is that the bearing sleeve assembly further includes a needle bearing, and the one-way bearing, the needle bearing and the bearing sleeve are sleeved on the rotating drive shaft;

[0009] Among them, the bearing sleeve includes a sleeve portion and a step portion with a diameter larger than the sleeve portion; the sleeve portion has an outer surface and an inner surface; the output end of the motor mechanism is connected to the outer surface of the sleeve portion; the rotating drive shaft is rollingly connected to the inner surface of the sleeve portion through a needle bearing; the junction of the step portion and the sleeve portion forms an annular first step surface for abutting the one-way bearing; the inner ring of the one-way bearing is fixedly connected to the rotating drive shaft, and the outer ring of the one-way bearing is fixedly connected to the step portion.

[0010] Furthermore, a preferred structure is that the step portion extends outward to form an annular second step surface, and the second step surface is connected to a damper for increasing the rotational resistance of the bearing sleeve.

[0011] Furthermore, a preferred structure is that the damper includes an elastic component and a ball, the fixed end of the elastic component is connected to the compression mechanism, and the free end of the elastic component faces the second step surface; the ball is rollingly connected to the free end of the elastic component and the second step surface.

[0012] Further, a preferred structure is that the compression mechanism includes an orbiting scroll and a fixed scroll, the fixed scroll is fixedly connected to the end cover, the fixed scroll is meshed with the orbiting scroll, the orbiting scroll is connected to the rotating drive shaft, the rotating drive shaft passes through the support bearing and is connected to the bearing sleeve assembly, and the end cover, the fixed scroll and the bearing seat corresponding to the support bearing form a compression chamber;

[0013] Among them, an anti-rotation mechanism is arranged in the slideway between the bearing seat and the movable scroll.

[0014] Furthermore, a preferred structure is that the motor mechanism includes a stator and a rotor with built-in magnetic steel, the stator is interference fit with the compressor housing, and the rotor is fixedly connected to the outer surface of the sleeve portion of the bearing sleeve.

[0015] Furthermore, a preferred structure is that a sealing ring is provided between the compressor housing and the end cover.

[0016] Furthermore, a preferred structure is that the belt mechanism is sleeved on a rotating drive shaft covered with a compressor housing, the compressor housing is rollingly connected to the rotating drive shaft, and the belt mechanism includes a pulley and an electromagnetic clutch for controlling the rotation of the pulley.

[0017] Further, a preferred structure is that the electromagnetic clutch is a friction electromagnetic clutch, including a suction cup, an electromagnetic coil and an elastic element for controlling the suction cup to engage or separate with the pulley; wherein,

[0018] The pulley is rollingly connected to the compressor housing through a pulley bearing, the electromagnetic coil is arranged between the pulley and the compressor housing, a suction cup is arranged in a direction parallel to the wheel shaft of the pulley, and the rotating drive shaft is connected to the suction cup through an elastic element.

[0019] In order to achieve the above object, the present invention also protects a dual-power compressor control method, the method realizes the power switching of the compressor through the dual-power compressor, the method comprising:

[0020] When the motor mechanism stops working and the engine is running, the electromagnetic clutch is turned on, and the electromagnetic coil generates an electromagnetic force that attracts the suction cup and the pulley. The pulley drives the rotating drive shaft to rotate through the electromagnetic clutch, and then drives the compression mechanism to rotate to compress the fluid; wherein, the rotating drive shaft drives the inner ring of the one-way bearing to rotate; the magnetic resistance is generated by the built-in magnetic steel of the rotor on the inner wall of the stator, and the damper arranged on the bearing seat rubs the second step surface of the bearing sleeve; so that the bearing sleeve and the outer ring of the one-way bearing are in a stationary state;

[0021] When the motor mechanism is working, the electromagnetic clutch is disconnected, and the suction cup and the pulley are in a separated state; the rotor drives the bearing sleeve connected to it to rotate, the inner ring and outer ring of the one-way bearing are locked, and the bearing sleeve drives the one-way bearing and the rotating drive shaft to rotate, thereby driving the compression mechanism to rotate to compress the fluid.

[0022] As described above, a dual-power compressor and a control method thereof of the present invention replaces the planetary gear reducer and the ratchet wheel by combining a bearing sleeve and a one-way bearing to achieve a stable connection between the motor drive and the scroll plate; the beneficial effects are as follows:

[0023] 1) The driving mode of the fuel vehicle air-conditioning compressor is converted from the fuel vehicle engine drive to the motor drive and the engine drive, which can be switched freely, so as to solve the problem that the fuel vehicle air-conditioning compressor stops working due to the engine being turned off; the pulley and the motor share a set of scroll plates, and a one-way bearing, a bearing sleeve, a motor and a scroll compression mechanism are coaxially arranged in the compressor housing; on the basis of realizing two driving modes, the installation space is further reduced, and the air-conditioning system is further lightweight;

[0024] 2) By using bearing sleeves and one-way bearings, the two drive modes can be operated independently. The one-way bearing is used as an overrunning clutch to avoid the motor rotor from rotating when the pulley is used for driving, thereby avoiding additional energy loss and maximizing the pulley power utilization.

[0025] 3) The use of a bearing sleeve and a one-way bearing combination to replace the planetary gear reducer and ratchet mechanism simplifies the overall structure of the compressor, improves operational stability, enhances the reliability of the compressor system, and further reduces the size of the compressor.

[0026] In order to achieve the above and related purposes, one or more aspects of the present invention include features that will be described in detail later and are particularly pointed out in the claims. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the following description and claims in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the accompanying drawings:

[0028] Figure 1 is a schematic structural diagram of a dual-power compressor according to an embodiment of the present invention;

[0029] Figure 2 is a structural schematic diagram of a compression mechanism according to an embodiment of the present invention;

[0030] Figure 3 is a structural schematic diagram of a bearing sleeve assembly according to an embodiment of the present invention;

[0031] Figure 4 is a structural schematic diagram of a one-way bearing according to an embodiment of the present invention;

[0032] Figure 5 is a structural schematic diagram of a wheel belt mechanism according to an embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of a dual-power compressor control method described in an embodiment of the present invention.

[0034] Among them, 1. compressor housing; 2. belt mechanism; 3. scroll compression mechanism; 4. end cover; 5. motor mechanism; 6. bearing sleeve assembly; 7. damper;

[0035] 21. Pulley; 22. Electromagnetic clutch; 221. Suction cup; 222. Electromagnetic coil; 223. Elastic element; 224. Nut; 225. Wheel bearing; 31. Orbital scroll; 32. Stationary scroll; 33. Rotating drive shaft; 331. End bearing; 332. Shaft seal; 34. Support bearing; 35. Bearing seat; 36. Anti-self-rotation mechanism; 37. Inlet; 38. Exhaust port; 39. Main balance block; 51. Stator; 52. Rotor; 53. Magnetic steel; 61. One-way bearing; 611. Inner ring; 612. Outer ring; 62. Bearing sleeve; 621. Sleeve portion; 622. Step portion; 623. First step surface; 624. Second step surface; 63. Needle roller bearing; 71. Spring; 72. Ball. DETAILED DESCRIPTION

[0036] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0037] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "front end", "end", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0038] The existing dual-power compressor includes a compressor housing, a pulley, an end cover, a planetary gear reducer, a ratchet clutch, a motor and a scroll compression mechanism arranged in the compressor housing; wherein the pulley is connected to the output shaft of the engine via a transmission belt, the output end of the pulley is connected to the compressor main shaft, and the output end of the motor is connected to the compressor main shaft through the planetary gear reducer, and the stability of the transmission mechanism needs to be improved. A dual-power compressor and a control method thereof of the present invention realize the use of the same pair of scroll disks by motor transmission and belt transmission by setting a one-way bearing as a one-way clutch. When the belt drives the eccentric rotating drive shaft to work on the scroll disk, the overrunning clutch characteristic of the one-way bearing is used to make the motor rotor stationary; when the belt stops, the motor rotor rotates to make the one-way bearing reverse-lock the rotating drive shaft, thereby driving the rotating drive shaft to work on the scroll disk, achieving the technical effect of further improving the operating stability of the dual-power compression device.

[0039] Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Figure 1 The structure of the dual-power compressor is described exemplarily. Figure 1 The structure of a dual-power compressor according to an embodiment of the present invention. Figure 1 As shown, the dual-power compressor includes a compressor housing 1, a belt mechanism 2, an end cover 4, a compression mechanism 3 arranged in the compressor housing 1 to compress the fluid by means of rotational motion, a rotating drive shaft 33 connected to the compression mechanism, and a motor mechanism 5 running through the rotating drive shaft 33. The compression mechanism is connected to the belt mechanism 2 through the rotating drive shaft 33 through the motor mechanism 5; wherein the motor mechanism 5 is connected to the rotating drive shaft 33 through a bearing sleeve assembly 6 including a one-way bearing 61 and a bearing sleeve 62. Specifically, the compression mechanism is a scroll compressor, and the dual-power compressor is arranged in a fluid compression refrigeration circuit in an air-conditioning system to compress the refrigerant. The front end of the rotating drive shaft 33, which is an eccentric main shaft, is inserted into the movable scroll of the scroll compressor and connected to the output end of the movable scroll. It should be noted that, in the specific implementation process, the compressor can be a scroll compression mechanism, or a centrifugal compression mechanism or an axial flow compression mechanism; in addition, in this embodiment, the compression mechanism, the rotating drive shaft 33 connected to the compression mechanism, and the motor mechanism 5 passing through the rotating drive shaft 33 are arranged in sequence in the compressor housing 1, and in the specific implementation process, the specific position is not limited.

[0041] Figure 2 The compression mechanism of the dual-power compressor is described exemplarily. Figure 2 The structure of the compression mechanism of the dual-power compressor according to one embodiment of the present invention. Figure 2 As shown, the compression mechanism includes a movable scroll 31 and a fixed scroll 32, the fixed scroll 32 is fixedly connected to the end cover 4, the fixed scroll 32 is meshed with the movable scroll 31, the movable scroll 31 is connected to the rotating drive shaft 33, the rotating drive shaft 33 passes through the support bearing 34 and is connected to the bearing sleeve assembly 6, the end cover 4, the fixed scroll 32 and the bearing seat 35 corresponding to the support bearing 34 form a compression chamber. The upper part of the compressor casing 1 is provided with an air intake port 37 and an air discharge port 38. In order to further ensure the operation of the compression mechanism, a valve plate and a main balance block 39 are also provided in the scroll, wherein the main balance block 39 can correct the rotation imbalance of the eccentric rotating drive shaft 33. Specifically, the end cover is fixedly connected to the fixed scroll, and the movable scroll is meshed with the fixed scroll, and the bearing seat, the end cover and the fixed scroll form a semi-enclosed space. After the rotating drive shaft is supported and connected by the support bearing and the bearing seat respectively, it is connected to the movable scroll through the joint head and the bearing.

[0042] In a specific embodiment, in order to further improve the stability of the compression mechanism, an anti-rotation mechanism 36 is provided in the slideway between the bearing seat 35 and the movable scroll. Specifically, the anti-rotation mechanism 36 is a cross slip ring, and can also be a pin-disc type or a pin-column type, etc., which is not specifically limited here.

[0043] The anti-rotation mechanism 36 is provided to enable the movable scroll 31 to orbit without rotating. The movable scroll moves in translation with the anti-rotation mechanism 36, and the volume of each compression chamber changes continuously, thereby achieving the action of sucking and compressing gas.

[0044] Figure 3 The bearing sleeve assembly of the dual-power compressor is described as an example. Figure 3 The structure of the bearing sleeve assembly according to one embodiment of the present invention is shown in FIG. Figure 3 As shown, the motor mechanism 5 includes a stator 51 and a rotor 52 with a built-in magnetic steel 53. The stator 51 is interference fit with the compressor housing 1, and the rotor 52 is fixedly connected to the outer surface of the sleeve portion 621 of the bearing sleeve 62. The stator and the rotor are combined to form a motor drive mechanism, and the rotor 52 rotates integrally with the rotating drive shaft 33. Through the magnetic resistance of the built-in magnetic steel of the rotor and the control of any two or three phases of the three-phase line of the motor stator to be turned on, the stator generates enhanced magnetic resistance to the rotor, further eliminating the phenomenon of overrunning and non-separation of the one-way bearing during the high-speed operation of the belt.

[0045] Specifically, the bearing sleeve assembly 6 further includes a needle bearing 63, and the one-way bearing 61, the needle bearing 63 and the bearing sleeve 62 are sleeved on the rotating drive shaft 33 in sequence. The bearing sleeve 62 includes a sleeve portion 621 and a step portion 622 having a diameter greater than that of the sleeve portion 621; the sleeve portion 621 has an outer surface and an inner surface; the output end of the motor mechanism 5 is connected to the outer surface of the sleeve portion 621; the rotating drive shaft 33 is rollingly connected to the inner surface of the sleeve portion 621 through the needle bearing 63; the junction of the step portion 622 and the sleeve portion 621 forms an annular first step surface 623 for abutting against the one-way bearing 61.

[0046] In a specific embodiment, the step portion 622 extends outward to form an annular second step surface 624, and the second step surface 624 is connected to the damper 7 for increasing the rotation resistance of the bearing sleeve 62. Specifically, the sleeve portion and the step portion are coaxially arranged; wherein the diameter of the sleeve portion is smaller, while the diameter of the step portion is larger, and the outer diameter of the second step surface is larger than its inner diameter, that is, the bearing sleeve 62 is a stepped sleeve structure with a gradually expanding diameter from one end close to the motor mechanism to the end away from the motor mechanism. In the specific implementation process, the bearing sleeve is respectively loaded with a one-way bearing and a needle bearing, the outer side of the front end is sleeved with a rotor, and the rear end is connected with a damper 7. Although in the implementation process, the needle bearing and the support bearing are used as sliding bearings, it is not limited to this, and for example, rolling bearings, deep groove ball bearings or bearing bushings can also be used. In addition, both the first step surface and the second step surface are annular. It should be noted that, in the present embodiment, the bearing sleeve assembly is configured as the above-mentioned structure. In the specific implementation process, it can also be configured as a bearing sleeve assembly with a damper-free structure according to the specific application scenario; or a small one-way bearing can be provided at each end to replace the current needle bearing; in addition, the one-way bearing can also be replaced by a one-way needle bearing; there is no limitation on the specific implementation method.

[0047] Through the design structure of the above-mentioned bearing sleeve, it is possible to achieve a fixed connection between the one-way bearing and the rotating drive shaft, a rolling connection between the needle bearing and the bearing sleeve, and a fixed connection between the rotor and the outer wall of the bearing sleeve. Furthermore, on the basis of achieving the positioning effect of the axial relative position of the rotor and the stator, it is also possible to achieve the technical effect of maintaining a relatively uniform air gap between the rotor and the stator during the operation of the motor; the rolling friction connection function between the damper and the end of the bearing sleeve is achieved, and it has the technical effects of reasonable design, stable structure, and reduced installation space.

[0048] In a specific embodiment, the damper 7 includes an elastic component (in this embodiment, the elastic component is a spring 71) and a ball 72. The fixed end of the spring 71 is connected to the compression mechanism, and the free end of the spring 71 faces the second step surface 624. The ball 72 is rollingly connected with the free end of the spring 71 and the second step surface 624. The spring 71 is provided with a ball 72 on one side facing the second step surface. In a specific implementation process, the ball may include a ball base and a ball. The ball base may be in an arc shape, and a spherical hole is provided on the ball base, and the ball is embedded in the spherical through hole. The size of the through hole is adapted to the size of the ball; the ball may also be directly set at the free end of the spring; rolling friction is generated by the contact between the ball and the second step surface 624 of the bearing sleeve, and the resistance generated by the rolling friction is small and the noise is small; and the bottom of the ball is set as a spring to increase the contact tightness between the ball and the second step surface. In order to further improve the compactness of the structure, the damper is embedded on the opposite surface of the second step of the bearing seat and the bearing sleeve. In short, by providing the damper 7, the friction force borne by the bearing sleeve is increased, and the phenomenon of overrunning and non-separation of the one-way bearing during high-speed operation of the belt is further eliminated. It should be noted that the elastic component can be a spring, a spring sheet, etc.

[0049] It should be noted that the present embodiment uses a spring and a ball as a damper. In the specific implementation process, any two or three phases of the three-phase line of the motor stator can be controlled to be turned on so that the stator generates enhanced magnetic resistance to the rotor to achieve damping.

[0050] The damper mechanism is not limited to the above two implementation methods, and other speed-type dampers are also applicable to this embodiment. For example, viscous damping can be achieved by using the viscosity of the refrigeration oil, increasing the contact area between the end face of the bearing seat and the second step surface 624, and adjusting the appropriate distance between the two.

[0051] Figure 4 An exemplary description is given of the one-way bearing of a dual-power compressor. Figure 4 The structure of a one-way bearing according to an embodiment of the present invention is shown in FIG. Figure 4 As shown, the one-way bearing includes an inner ring 611 and an outer ring 612; the inner ring 611 of the one-way bearing 61 is fixedly connected to the rotating drive shaft 33, and the outer ring 612 of the one-way bearing is fixedly connected to the step portion 622. It should be noted that the connection between the one-way bearing and the rotating drive shaft can be a key connection, an interference connection, etc.; the overrunning clutch characteristic when the inner ring of the one-way bearing rotates while the outer ring does not rotate, and the backstop locking characteristic when the outer ring rotates are fully utilized.

[0052] Specifically, when the wheel belt drives the eccentric rotating drive shaft to do work on the scroll disk, the overrunning clutch characteristics of the one-way bearing are used to make the motor rotor stationary; when the wheel belt stops, the motor rotor rotates to cause the one-way bearing to reverse-lock the rotating drive shaft, thereby driving the rotating drive shaft to do work on the scroll disk, achieving the technical effect of further improving the operating stability of the dual-power compression.

[0053] Figure 5 The belt mechanism of the dual-power compressor is described exemplarily. Figure 5 The structure of the belt mechanism according to one embodiment of the present invention is shown in FIG. Figure 5 As shown, the belt mechanism 2 is sleeved on the rotating drive shaft 33 covered with the compressor housing 1, the compressor housing 1 is rollingly connected with the rotating drive shaft 33, and the belt mechanism 2 includes a pulley 21 and an electromagnetic clutch 22 for controlling the rotation of the pulley 21. The electromagnetic clutch 22 controls the rotation of the belt to be turned on and off.

[0054] Specifically, the stator of the motor mechanism is fixed inside the compressor housing, and at one end of the stator structure close to the belt mechanism, the compressor housing is covered on the outside of the rotating drive shaft. The compressor housing is connected to the belt mechanism 2 through the belt bearing 225 sleeved on the compressor housing. Inside the compressor housing 1, the rotating drive shaft 33 passes through the shaft seal 332 and the end bearing 331 to achieve a rolling connection with the compressor housing outside. A sealing ring is provided between the compressor housing 1 and the end cover 4, and the compressor housing is combined with the end cover to form the external housing structure of the compressor.

[0055] In a specific embodiment, the electromagnetic clutch 22 is a friction electromagnetic clutch, including a suction cup 221, an electromagnetic coil 222 and an elastic element 223 for controlling the suction cup 221 to engage or separate with the pulley 21; wherein the pulley 21 is rollingly connected to the compressor housing 1 through a belt bearing 225, the electromagnetic coil 222 is arranged between the pulley 21 and the housing 1, a suction cup 221 is arranged in a direction parallel to the axle of the pulley 21, and the rotating drive shaft 33 is connected to the suction cup 221 through the elastic element 223. Specifically, the electromagnetic clutch 22 is arranged at the end of the rotating drive shaft close to the belt mechanism; one end of the elastic element is connected to the rotating drive shaft through a nut 224, and the other end of the elastic element is connected to the suction cup. By controlling whether the electromagnetic coil is energized or not, the engagement and separation of the wheel drive power is controlled.

[0056] The present invention also includes a dual-power compressor control method.

[0057] Figure 6 The principle of the dual-power compressor control method is described. Figure 6 Schematic diagram of the principle of the dual-power compressor control method according to an embodiment. Figure 6 As shown, the dual-power compressor control method realizes the power switching of the compressor through the dual-power compressor, and the method includes:

[0058] S610. When the motor mechanism stops working and the engine is running, the electromagnetic clutch is turned on, and the electromagnetic coil generates an electromagnetic force that attracts the suction cup and the pulley. The pulley drives the rotating drive shaft to rotate through the electromagnetic clutch, and then drives the compression mechanism to rotate to compress the fluid; wherein, the rotating drive shaft drives the inner ring of the one-way bearing to rotate; the inner wall of the stator is attracted by the built-in magnet of the rotor, and the second step surface of the bearing sleeve is rubbed by the damper arranged on the bearing seat; so as to realize that the bearing sleeve and the outer ring of the one-way bearing are in a stationary state.

[0059] In the specific implementation process, any two or three phases of the three-phase line of the motor stator can be controlled to be turned on, so that the stator generates enhanced magnetic resistance to the rotor, thereby achieving the outer ring of the bearing sleeve and the one-way bearing being in a stationary state.

[0060] S620. When the motor mechanism is working, the electromagnetic clutch is disconnected, and the suction cup and the pulley are in a separated state; the rotor drives the bearing sleeve engaged with it to rotate, the inner ring and the outer ring of the one-way bearing are locked, and the bearing sleeve drives the one-way bearing and the rotating drive shaft to rotate, thereby driving the compression mechanism to rotate to compress the fluid.

[0061] When the wheel belt drives the eccentric rotating drive shaft to do work on the scroll disk, the one-way bearing's inner ring rotates while the outer ring does not rotate, and its overrunning clutch characteristics are exerted to make the motor rotor stationary; when the wheel belt stops, the motor's rotor rotates to cause the one-way bearing to reverse-lock the rotating drive shaft, thereby driving the rotating drive shaft to do work on the scroll disk, achieving the technical effect of further improving the operating stability of the dual-power compression device.

[0062] The dual-power compressor and control method of the present invention realize the independent operation of two driving modes by adopting a one-way bearing, further solve the reverse electromotive force generated by the pulley and the motor sharing a scroll plate, thereby avoiding the damage of the reverse electromotive force to the motor and the control system. On the basis of improving the operating stability of the compressor, the installation space is further reduced, the cost is reduced, and the technical effect of achieving lightweight compressor is achieved.

[0063] Although the above disclosed content shows exemplary embodiments of the present invention, it should be noted that various changes and modifications can be made without departing from the scope of the present invention defined in the claims. According to the structure of the inventive embodiments described herein, the constituent elements of the claims can be replaced with any functionally equivalent elements. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A dual-power compressor, characterized in that: It includes a compressor housing, a belt mechanism, an end cover, a compression mechanism arranged in the compressor housing and compressing a fluid by means of a rotational motion, a rotational drive shaft connected to the compression mechanism, and a motor mechanism passing through the rotational drive shaft; The compression mechanism is connected to the belt mechanism through the rotating drive shaft passing through the motor mechanism; wherein the motor mechanism is connected to the rotating drive shaft through a bearing sleeve assembly including a one-way bearing and a bearing sleeve; The bearing sleeve assembly further comprises a needle bearing, and the one-way bearing, the needle bearing and the bearing sleeve are sleeved on the rotating drive shaft in sequence; Wherein, the bearing sleeve comprises a sleeve portion and a step portion with a diameter larger than that of the sleeve portion; the sleeve portion has an outer surface and an inner surface; the output end of the motor mechanism is connected to the outer surface of the sleeve portion; the rotating drive shaft is rollingly connected to the inner surface of the sleeve portion through the needle bearing; the junction of the step portion and the sleeve portion forms an annular first step surface for abutting against the one-way bearing; the inner ring of the one-way bearing is fixedly connected to the rotating drive shaft, and the outer ring of the one-way bearing is fixedly connected to the step portion; The step portion extends outward to form an annular second step surface, the second step surface is connected to a damper for increasing the rotation resistance of the bearing sleeve, the bearing sleeve is respectively equipped with a one-way bearing and a needle bearing, the outer side of the front end is sleeved with a rotor, the rear end is connected with a damper, and the damper is connected to the end of the bearing sleeve by rolling friction; The damper includes an elastic component and a ball, the fixed end of the elastic component is connected to the compression mechanism, and the free end of the elastic component faces the second step surface; the ball is rollingly connected to the free end of the elastic component and the second step surface, and the damper is embedded on the opposite surface of the second step of the bearing seat and the bearing sleeve. In short, by arranging the damper, the friction force borne by the bearing sleeve is increased, and the overrunning and non-separation phenomenon of the one-way bearing during the high-speed operation of the wheel belt is further eliminated.

2. The dual-power compressor according to claim 1, characterized in that: The compression mechanism comprises an orbiting scroll and a fixed scroll, the fixed scroll is fixedly connected to the end cover, the fixed scroll is meshed with the orbiting scroll, the orbiting scroll is connected to the rotating drive shaft, the rotating drive shaft is connected to the bearing sleeve assembly through a support bearing, and the end cover, the fixed scroll and a bearing seat corresponding to the support bearing form a compression chamber; Wherein, an anti-rotation mechanism is provided in the slideway between the bearing seat and the movable scroll.

3. The dual-power compressor according to claim 1, characterized in that: The motor mechanism comprises a stator and a rotor with built-in magnetic steel, the stator is interference-fitted with the compressor housing, and the rotor is fixedly connected to the outer surface of the sleeve portion of the bearing sleeve.

4. The dual-power compressor according to claim 1, characterized in that: A sealing ring is arranged between the compressor housing and the end cover.

5. The dual-power compressor according to claim 1, characterized in that: The belt mechanism is sleeved on a rotating drive shaft covered with a compressor housing, the compressor housing is rollingly connected to the rotating drive shaft, and the belt mechanism comprises a pulley and an electromagnetic clutch for controlling the rotation of the pulley.

6. The dual-power compressor according to claim 5, characterized in that: The electromagnetic clutch is a friction electromagnetic clutch, comprising a suction cup, an electromagnetic coil and an elastic element for controlling the suction cup to engage or separate with the pulley; wherein, The pulley is rollingly connected to the compressor housing via a pulley bearing, the electromagnetic coil is arranged between the pulley and the compressor housing, the suction cup is arranged in a direction parallel to the wheel axle of the pulley, and the rotating drive shaft is connected to the suction cup via the elastic element.

7. A dual-power compressor control method, using the dual-power compressor according to any one of claims 1 to 6 to achieve power switching of the compressor, the method comprising: When the motor mechanism stops working and the engine is running, the electromagnetic clutch is turned on, and the electromagnetic coil generates an electromagnetic force that attracts the suction cup and the pulley. The pulley drives the rotating drive shaft to rotate through the electromagnetic clutch, and then drives the compression mechanism to rotate to compress the fluid; wherein, the rotating drive shaft drives the inner ring of the one-way bearing to rotate; the magnetic resistance is generated by the built-in magnetic steel of the rotor on the inner wall of the stator, and the damper arranged on the bearing seat rubs the second step surface of the bearing sleeve, so that the outer ring of the bearing sleeve and the one-way bearing are in a stationary state; When the motor mechanism is working, the electromagnetic clutch is disconnected, and the suction cup and the pulley are in a separated state; the rotor drives the bearing sleeve engaged with it to rotate, the inner ring and the outer ring of the one-way bearing are locked, and the bearing sleeve drives the one-way bearing and the rotating drive shaft to rotate, thereby driving the compression mechanism to rotate to compress the fluid.

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