scroll compressor

Abstract

The present invention provides a scroll compressor, comprising a front shell; a rear shell provided with a bearing support and a first cavity capable of accommodating at least one power module; a hollow casing connecting the front shell and the rear shell, wherein one end of the casing connected to the rear shell is provided with an air intake; a crankshaft and a secondary bearing accommodated in the casing, wherein one side of the secondary bearing is sleeved on one end of the long axis of the crankshaft, and the other side of the secondary bearing is mounted on the bearing support; and a heat dissipation structure fixed to the long axis of the crankshaft, wherein the rotation of the crankshaft drives the heat dissipation structure to rotate and generate airflow toward the rear shell. The compressor has a heat dissipation structure, which strengthens the heat exchange between the low-temperature and low-pressure refrigerant and the power module of the controller, so that the power module can be cooled to the greatest extent by the refrigerant inhaled by the compressor, thereby achieving cooling of the power module of the controller and improving the overall reliability of the compressor.

Description

Technical Field

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

[0002] The development trend of automotive electric scroll compressors is to have a wider speed range and a larger operating range. When the compressor runs at a lower speed, the refrigerant flow is small, and the cooling effect on the controller becomes worse. This makes it impossible for the heat generated by the controller power module to be taken away in time, and the power module temperature rises, resulting in the compressor's load capacity at low speed being limited, affecting its operating range at low speed.

[0003] The patent (CN113404668A) discloses a scroll compressor, which includes a shell, a suction pipe, a cold rod and a controller. The shell is divided into an electric control area and a high-pressure area. The suction pipe is arranged on the side of the shell. The cold rod enters the electric control area to connect to the suction pipe and is fixed to the shell wall of the high-pressure area. The cold rod has an internal channel for circulating refrigerant. The controller is arranged on the outer surface of the cold rod, and the waste heat generated by the controller is dissipated by the cold rod. The limitations of this solution are: First, the cold rod is installed in the controller cavity, which will occupy a large space of the controller cavity and the printed circuit board (PCB), which is not conducive to the arrangement of electronic components; second, since the internal channel of the cold rod is in a straight line and directly connected to the air intake, the position of the air intake is determined by the position of the controller, which limits the position of the compressor air intake and is not conducive to meeting the needs of different customers; third, natural cooling can only be achieved through suction, and the heat dissipation effect is poor when the compressor is running at low speed.

[0004] In the existing technology, a heat dissipation structure is added to the compressor to address the cooling problem of the controller, thereby improving the reliability of the controller. However, these solutions also have some shortcomings. For example, patent (CN214617019U) discloses a scroll compressor with a heat dissipation structure, comprising a housing, a top cover and a bottom cover at both ends of the housing, a PCB controller connected to one end of the bottom cover, an air intake opening on the side connected to the bottom cover for drawing in refrigerant, a fin-shaped baffle for guiding the refrigerant on the air intake opening corresponding to the bearing seat in the bottom cover, when the refrigerant enters the housing through the air intake opening, it is finally transferred to the PCB controller through thermal grease, thereby achieving good heat dissipation, prolonging the service life of the scroll compressor, thereby improving the efficiency of the compressor, and also reducing some noise. That is, the disclosure adds a fin-shaped baffle in the bottom cover to guide part of the refrigerant to the PCB controller. There are three limitations to this solution. First, the refrigerant guided by the fin-shaped baffle can only cool the outer area of ​​the bearing seat, and the cooling effect on the controller in the corresponding area of ​​the bearing seat is poor; second, the refrigerant entering the compressor from the intake port flows more toward the scroll disk, and only a small part flows along the fin baffle to participate in cooling, and the cooling effect is limited; third, the controller and the low-temperature refrigerant are separated by a thicker bottom cover. This design increases the thermal resistance and affects the cooling effect.

[0005] Patent (CN211764820U) discloses a heat dissipation structure for a vehicle air-conditioning compressor controller, which includes a compressor housing, a compressor, a controller housing, a controller, and a work box. A water tank is installed below the work box, and a micro pump is fixedly installed in the water tank. A water inlet pipe is fixedly connected to one side of the micro pump, and one end of the water inlet pipe is fixedly connected to a condenser pipe. The end of the condenser pipe away from the water inlet pipe is fixedly connected to a water outlet. The end of the water outlet away from the condenser pipe is fixedly connected to the wall of the water tank away from the water inlet pipe. A fixture is also fixedly installed on the outer wall of the work box, and the fixture is fixedly connected to the condenser pipe. A semiconductor refrigeration plate is installed on the wall of the condenser pipe. That is, the disclosure uses an external water tank to cool the controller. Its limitations are: a larger space is required to meet the installation requirements of the heat dissipation structure; water is used as the cooling medium, which needs to be replenished in time; and the use of semiconductor refrigeration to cool the circulating water brings additional energy consumption, which is not friendly to the battery life of electric vehicles.

[0006] Therefore, the cooling problem of the controller in the scroll compressor is still a technical problem that needs to be solved urgently in this field.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0008] In response to the problems in the prior art, the purpose of the present invention is to provide a scroll compressor having a heat dissipation structure to enhance the heat exchange between the low-temperature and low-pressure refrigerant and the power module of the controller, so that the power module can be cooled to the greatest extent by the refrigerant sucked in by the compressor, thereby realizing the cooling of the power module of the controller and improving the overall reliability of the compressor.

[0009] An embodiment of the present invention provides a scroll compressor, comprising:

[0010] front shell;

[0011] The rear housing is provided with a bearing support and a first cavity capable of accommodating at least one power module;

[0012] A hollow shell connects the front shell and the rear shell, and an air inlet is provided at one end where the shell and the rear shell are connected;

[0013] A crankshaft and a secondary bearing are accommodated in the housing, one side of the secondary bearing is sleeved with one end of the long axis portion of the crankshaft, and the other side of the secondary bearing is mounted on the bearing bracket; and

[0014] The heat dissipation structure is fixed to the long axis portion of the crankshaft, and the rotation of the crankshaft drives the heat dissipation structure to rotate to generate airflow toward the rear shell.

[0015] According to some embodiments of the present invention, the heat dissipation structure has a blade-type structure, including a fan base and at least one fan blade;

[0016] The fan base is fixed to the outer wall of the long axis;

[0017] The at least one fan blade is circumferentially arranged on the side wall of the fan base.

[0018] According to some embodiments of the present invention, the fan base and the long axis portion are connected by interference fit, retaining spring connection, key connection, shrink fit connection, threaded connection or riveted connection.

[0019] According to some embodiments of the present invention, the fan blades are made of metal, plastic or rubber material; and / or

[0020] According to some embodiments of the present invention, the fan blades are made by an injection molding process, a 3D printing process, a machining process or a casting process.

[0021] According to some embodiments of the present invention, the heat dissipation structure includes a plurality of fan blades and a frame arranged on the periphery of the plurality of fan blades.

[0022] According to some embodiments of the present invention, the scroll compressor further includes a baffle disposed on the inner wall of the shell at the suction port.

[0023] According to some embodiments of the present invention, a second cavity is provided between the bearing bracket of the rear shell and the auxiliary bearing, and at least one exhaust hole is provided on the bearing bracket, and the at least one exhaust hole connects the second cavity and the cavity formed by the rear shell and the motor.

[0024] According to some embodiments of the present invention, the at least one exhaust through hole is provided on a side of the bearing bracket away from the air intake port.

[0025] According to some embodiments of the present invention, the scroll compressor further comprises a baffle disposed on the inner wall of the housing at the air inlet, and the baffle is an open annular structure;

[0026] The non-closed portion of the baffle is arranged on a side of the bearing bracket away from the air inlet.

[0027] According to some embodiments of the present invention, the system further includes at least one power module accommodated in the first cavity, and the heat dissipation surface of each power module is arranged on the cavity wall between the first cavity and the second cavity.

[0028] The present invention is a compressor with a controller cooling function, which utilizes blades to enhance convection heat exchange on the power module mounting surface of the controller, thereby improving the load capacity and operating range of the compressor.

[0029] The present invention reasonably utilizes the existing internal space of the compressor and does not add additional cooling pipelines. By adding a heat dissipation structure, the heat dissipation effect of the power module and the auxiliary bearing of the controller is enhanced, so that the power module can be cooled by the refrigerant sucked into the compressor to the greatest extent, and the heat exchange between the low-temperature and low-pressure refrigerant and the power module of the controller is enhanced, thereby realizing the cooling of the power module of the controller and improving the overall reliability of the compressor; in some embodiments, more refrigerant is allowed to flow through the auxiliary bearing through the second cavity between the rear shell and the auxiliary bearing, providing more oil and gas lubrication for the auxiliary bearing, thereby ensuring efficient operation of the compressor. The compressor heat dissipation mechanism of the present invention has a simple structure and its manufacturing process is correspondingly simple. While ensuring the reliability of oil and gas supply, it realizes sufficient lubrication of the auxiliary bearing and sufficient cooling of the controller power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more apparent. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same figure numbers in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0031] Figure 1 Schematic diagram of the structure of a scroll compressor according to an embodiment of the present invention;

[0032] Figure 2 and Figure 3 They are schematic structural diagrams of heat dissipation structures according to different embodiments of the present invention;

[0033] Figure 4 and Figure 5 Schematic diagrams of connections between the heat dissipation structure and the crankshaft according to different embodiments of the present invention;

[0034] Figure 6 Schematic diagram of the structure of a power module according to an embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the airflow state of a scroll compressor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0037] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this specification. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, described in this specification, unless otherwise mutually incompatible.

[0038] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. Terms indicating relative spaces such as "below" and "above" may be used to more easily explain the relationship of one device relative to another device illustrated in the accompanying drawings. Such terms refer not only to the meaning indicated in the accompanying drawings, but also to other meanings or operations of the device in use. For example, if the device in the accompanying drawings is turned over, a device that was previously described as being "below" another device is described as being "above" the other device. Therefore, the exemplary term "below" includes both above and below. The device can be rotated 90° or other angles, and the terms indicating relative spaces are interpreted accordingly.

[0039] Although the terms first, second, etc. are used herein to represent various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are represented. Furthermore, as used herein, the singular forms "one," "an," and "the" are intended to also include the plural forms, unless the context indicates otherwise. It should be further understood that the terms "comprise" and "include" indicate the presence of the described features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0040] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this specification belongs. Terms defined in commonly used dictionaries are supplementally interpreted as having meanings consistent with relevant technical literature and current knowledge, and unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0041] In response to the existing technical problems, the present invention provides a scroll compressor, comprising a front shell; a rear shell, provided with a bearing bracket and a first cavity capable of accommodating at least one power module; a hollow shell connecting the front shell and the rear shell, wherein one end of the shell connected to the rear shell is provided with an air intake; a crankshaft and a secondary bearing accommodated in the shell, one side of the secondary bearing being sleeved on one end of the long axis of the crankshaft, and the other side of the secondary bearing being mounted on the bearing bracket; and a heat dissipation structure fixed to the long axis of the crankshaft, wherein the rotation of the crankshaft drives the heat dissipation structure to rotate to generate wind flow toward the rear shell.

[0042] The present invention reasonably utilizes the existing internal space of the compressor and does not add additional cooling pipelines. By adding a heat dissipation structure, the heat dissipation effect of the power module and the auxiliary bearing of the controller is enhanced, so that the power module can be cooled by the refrigerant sucked into the compressor to the greatest extent, and the heat exchange between the low-temperature and low-pressure refrigerant and the power module of the controller is enhanced, thereby realizing the cooling of the power module of the controller and improving the overall reliability of the compressor; in some embodiments, more refrigerant is allowed to flow through the auxiliary bearing through the second cavity between the rear shell and the auxiliary bearing, providing more oil and gas lubrication for the auxiliary bearing, thereby ensuring efficient operation of the compressor. The compressor heat dissipation mechanism of the present invention has a simple structure and its manufacturing process is correspondingly simple. While ensuring the reliability of oil and gas supply, it realizes sufficient lubrication of the auxiliary bearing and sufficient cooling of the controller power module.

[0043] The structure of the scroll compressor of the present invention is further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present invention.

[0044] Figure 1 1 is a schematic structural diagram of a scroll compressor according to an embodiment of the present invention. Specifically, the scroll compressor includes:

[0045] front shell 11;

[0046] The rear housing 13 is provided with a bearing bracket 131 and a first cavity a for accommodating at least one power module;

[0047] A hollow shell 12 connects the front shell 11 and the rear shell 13 , and an air inlet 121 is provided at one end of the shell 12 connected to the rear shell 13 ;

[0048] The crankshaft 2 and auxiliary bearing 3 are housed in the housing 12. Typically, the crankshaft 2 includes a long shaft portion, one end of which is connected to one side of the auxiliary bearing 3. An eccentric pin is provided at the other end. A shoulder portion is provided between the long shaft portion and the eccentric pin. The compressor's main bearing is sleeved onto the shoulder portion of the crankshaft and rotatably engages with it. The other side of the auxiliary bearing 3 is mounted on the bearing bracket 131.

[0049] Of course, the scroll compressor also includes a motor and a compression scroll disposed in the interior space of the housing 12. The motor includes a rotor assembly 41 and a stator assembly 42. The rotor assembly 41 is interference-fitted with the crankshaft 2, and the stator assembly 42 is located on the periphery of the rotor assembly 41. The compression scroll includes an orbiting scroll 51 and a fixed scroll 52 that cooperate to form a plurality of compression chambers. The eccentric pin of the crankshaft 2 drives the orbiting scroll 51 to rotate.

[0050] The scroll compressor of the present invention also includes a heat dissipation structure 8, which is fixed to the long axis of the crankshaft 2, that is, arranged between the rotor assembly 41 and the auxiliary bearing 3. The rotation of the crankshaft 2 drives the heat dissipation structure 8 to rotate in the same direction and speed to generate airflow toward the rear shell 13.

[0051] In some embodiments, the heat dissipation structure has a blade-shaped structure. Figure 2 This is a structural schematic diagram of the heat dissipation structure of an embodiment of the present invention, wherein the heat dissipation structure 8 includes a fan base 81 and at least one fan blade 82; the fan base 81 is fixed to the outer wall of the long axis portion 2; the fan blade 82 is circumferentially arranged on the side wall of the fan base 81.

[0052] The fan blades 82 can be made of materials such as metal, plastic or rubber materials; the fan blades 82 can be made by injection molding, 3D printing, machining or casting. The base 81 can also be made of materials such as metal, plastic or rubber materials, and the same process can be used as the fan blades 82. In this case, the base 81 and the fan blades 82 can be made into an integral piece. In the present invention, there is no limitation on the number and shape of the fan blades, and they can be set according to the specific model of the compressor, such as the space between the rotor assembly 41 and the secondary bearing 3 in the casing. When a heat dissipation structure includes multiple fan blades, the multiple fan blades can be evenly distributed on the circumference of the side wall of the fan base 82. It should be noted that,

[0053] Figure 3 This is a structural schematic diagram of the heat dissipation structure of another embodiment of the present invention, wherein the heat dissipation structure includes a plurality of fan blades 82 and a circular frame 83 arranged on the periphery of the plurality of fan blades 82. The frame 83 arranged on the periphery of the plurality of fan blades can fix the fan blades to increase the rigidity of the heat dissipation mechanism of the blade-type structure.

[0054] In the present invention, the fixed connection method of the fan base 81 and the outer wall of the long axis portion 2 is not limited. In order to ensure that the heat dissipation structure does not loosen during operation, preferably, the fan base 81 and the long axis portion 2 can be connected by interference fit, spring connection, key connection, shrink fit connection, threaded connection or riveted connection, etc. Figure 4 and Figure 5 shown.

[0055] The connection method between the fan blades 82 and the fan base 81 is also not limited, and can be a T-bolt connection, a pre-embedded bolt connection, an implanted bolt connection, etc. As mentioned above, the fan blades and the base can also be formed in one piece, in which case no additional connection is required. The above connections can effectively prevent the fan blades from loosening during operation.

[0056] When the scroll compressor of the present invention is in operation, the refrigerant gas enters the cavity between the motor of the compressor and the rear shell 13 from the air intake port 121, and the rotation of the crankshaft 2 drives the heat dissipation structure 8 to rotate in the same direction and speed, generating a flow of refrigerant gas toward the rear shell 13, which can effectively enhance the heat exchange between the refrigerant gas and the first cavity a of the rear shell 13. When the power module of the controller is set in the first cavity a of the rear shell 13, the heat dissipation of the power module can be effectively enhanced accordingly.

[0057] The power module 9 provided in the present invention can be an IGBT power module, that is, a power module composed of an insulated gate bipolar transistor (IGBT). It is essentially a composite power device that integrates the advantages of a bipolar power transistor and a power MOSFET. It is mainly used in the main circuit inverter of the frequency converter and all inverter circuits, that is, DC / AC conversion, and is a key component of the controller. The IGBT power module has the advantages of large input impedance, low drive power, simple control circuit, low switching loss, fast on-off speed, high operating frequency, and large component capacity. Usually, the IGBT power module has a heat dissipation surface 91, such as Figure 6 When the compressor of the present invention further comprises a plurality of power modules, the heat dissipation surface thereof can be arranged on the cavity wall between the cavity formed by the rear shell and the motor and the first cavity a.

[0058] In some embodiments, the scroll compressor further includes a baffle 7 disposed on the inner wall of the housing 12 at the air inlet 121. Figure 1As shown, the baffle 7 is mounted on the inner wall of the housing 12 between the air intake and the motor. The baffle 7 can be an open ring structure, such as a semicircular ring structure. When the refrigerant gas enters the compressor from the air intake 121, the vortex suction structure causes the refrigerant gas to flow toward the motor. The arrangement of the baffle 7 allows as much refrigerant gas as possible to pass through the cavity formed by the rear housing and the motor before flowing to the motor, thereby enhancing the heat exchange between the refrigerant gas and the first cavity a of the rear housing 13. At the same time, the refrigerant gas can still flow toward the compression scroll side from the open portion of the baffle 7.

[0059] In some embodiments, the bearing bracket 131 provided on the rear housing 13 may be as follows: Figure 1 As shown, the bearing support 131 forms a protrusion facing away from the first cavity a. In this case, a second cavity b is formed between the bearing support 131 and the auxiliary bearing 3. Typically, the auxiliary bearing 3 is connected to the bearing support 131 via the inner bearing ring, bearing balls, and outer bearing ring. Refrigerant gas can flow into the second cavity b through the gaps between the inner bearing ring, bearing balls, and outer bearing ring. The bearing support 131 may also be provided with at least one exhaust hole 1311, which connects the second cavity b with the cavity formed by the rear housing 13 and the motor.

[0060] The compressor of the above structure may further include at least one power module 9 housed in the first cavity a, and the heat dissipation surface 91 of each of the power modules 9 is arranged on the cavity wall between the first cavity a and the second cavity b. Of course, in actual use, in order to facilitate the installation of the power module 9, a slot for accommodating the power module may be provided in the cavity wall between the first cavity a and the second cavity b. Figure 7 The figure is a schematic diagram of the airflow state of the scroll compressor of this embodiment. When the scroll compressor is running, the refrigerant gas enters the cavity between the motor and the rear shell 13 of the compressor from the air intake port 121. There is a baffle 7 blocking the channel near the air intake port 121, so that as much refrigerant gas as possible flows in the direction of the rear shell 13. At the same time, the rotation of the crankshaft 2 drives the heat dissipation structure 8 to rotate in the same direction and speed, generating a wind flow of refrigerant gas toward the rear shell 13. The refrigerant gas flows into the second cavity b through the gap between the inner ring of the bearing, the bearing ball and the outer ring of the bearing. The refrigerant gas then flows out from the exhaust through hole 1311 into the cavity formed by the rear shell 13 and the motor. The refrigerant gas flow state of the above process is shown as follows. Figure 7 As shown by the arrows, the heat exchange between the refrigerant gas and the cavity wall between the first cavity a and the second cavity b is effectively enhanced, thereby improving the heat dissipation effect of the power module 9 on the cavity wall.

[0061] Figure 7In the embodiment, the at least one exhaust through-hole 1311 can be disposed on a side of the bearing support 131 away from the air intake 121. Accordingly, the unclosed portion of the baffle 7 is disposed on a side of the bearing support away from the air intake 121. That is, the unclosed portion of the baffle 7 and the exhaust through-hole 1311 are located on one side of the compressor, which facilitates the refrigerant gas flowing into the cavity formed by the rear housing 13 and the motor to flow from the unclosed portion of the baffle 7 to the compression scroll, thereby improving the overall efficiency of the compressor.

[0062] In existing compressors, the auxiliary bearing and the first chamber housing the controller's power module are cooled naturally only by the inhaled refrigerant gas, resulting in weak heat exchange between the two. The present invention, with its heat dissipation structure 8 and second cavity b within the rear housing 13, utilizes the crankshaft 2 to drive the heat dissipation structure 8 to rotate during operation, generating forced convection. This improves the convective heat exchange between the auxiliary bearing 3 and the second cavity b, thereby alleviating the controller's high-temperature issues. Furthermore, when the heat dissipation structure 8 generates forced convection, it also blows the oil mist from the refrigerant gas toward the auxiliary bearing 3, optimizing its lubrication and ensuring the compressor's reliability.

[0063] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A scroll compressor, characterized in that: include: front shell; The rear housing is provided with a bearing support and a first cavity capable of accommodating at least one power module; A hollow shell connects the front shell and the rear shell, and an air inlet is provided at one end where the shell and the rear shell are connected; A crankshaft and a secondary bearing are accommodated in the housing, one side of the secondary bearing is sleeved with one end of the long axis of the crankshaft, and the other side of the secondary bearing is mounted on the bearing bracket; as well as A heat dissipation structure is fixed to the long axis of the crankshaft, and the rotation of the crankshaft drives the heat dissipation structure to rotate to generate airflow toward the rear housing; It also includes a baffle disposed on the inner wall of the shell at the air inlet, and the baffle is an open annular structure; The non-closed portion of the baffle is arranged on a side of the bearing bracket away from the air inlet; A second cavity is provided between the bearing bracket of the rear housing and the auxiliary bearing, and at least one exhaust through-hole is provided on the bearing bracket, and the at least one exhaust through-hole communicates with the second cavity and the cavity formed by the rear housing and the motor; The at least one exhaust through hole is arranged on a side of the bearing bracket away from the air intake port.

2. The scroll compressor according to claim 1, wherein: The heat dissipation structure has a blade-shaped structure, including a fan base and at least one fan blade; The fan base is fixed to the outer wall of the long axis; The at least one fan blade is circumferentially arranged on the side wall of the fan base.

3. The scroll compressor according to claim 2, wherein: The fan base and the long axis portion are connected by interference fit, spring connection, key connection, shrink fit connection, thread connection or riveting connection.

4. The scroll compressor according to claim 2, wherein: The fan blades are made of metal, plastic or rubber; and / or The fan blades are made by injection molding, 3D printing, machining or casting.

5. The scroll compressor according to claim 2, wherein: The heat dissipation structure includes a plurality of fan blades and a frame arranged on the outer periphery of the plurality of fan blades.

6. The scroll compressor according to claim 1, wherein: The system further comprises at least one power module accommodated in the first cavity, and the heat dissipation surface of each power module is arranged on the cavity wall between the first cavity and the second cavity.

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