scroll compressor

Abstract

The present invention provides a scroll compressor, which includes a front shell; a rear shell provided with a bearing support and a first cavity capable of accommodating at least one controller 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 flow guide unit provided on the end face of the bearing support facing away from the first cavity; the flow guide unit and the end face of the bearing support form a wedge-shaped channel, wherein the large end face of the wedge-shaped channel is arranged opposite to the air intake. The air intake of the scroll compressor of the present invention is provided with the flow guide unit, which has a simple structure and is easy to install, effectively reducing the cost of the entire compressor. More importantly, the flow guide unit allows the refrigerant to pass through the channel formed by the flow guide unit and the bearing support before entering the compression chamber suction chamber, thereby effectively reducing the temperature of the controller power module of the compressor control system installed on the opposite side thereof, thereby improving the stability of the operation of the entire compressor and the service life of the entire compressor.

Description

Technical Field

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

[0002] During actual operation, the compressor may face certain extreme working conditions, which may cause the heating elements inside the compressor to dissipate heat poorly, thereby reducing the overall efficiency of the compressor or even causing it to shut down.

[0003] Existing rear housing assemblies with heat dissipation structures are complex and difficult to cast. Furthermore, due to the pressure differential, most of the intake air begins to flow into the working chamber before the rear housing assembly is fully formed, resulting in suboptimal cooling of the controller-mounted side of the compressor rear housing. Developing an efficient heat dissipation structure to optimize the controller's operating temperature, thereby extending the compressor's service life and preventing damage to the controller, is a pressing issue in the electric compressor industry.

[0004] 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 those skilled in the art. Summary of the Invention

[0005] In response to the problems in the prior art, the purpose of the present invention is to provide a scroll compressor, in which the air intake of the scroll compressor is provided with a guide unit. The guide unit has a simple structure and is easy to install, which effectively reduces the cost of the entire compressor. More importantly, it can effectively reduce the temperature of the controller power module of the control system of the compressor installed on the opposite side thereof, thereby improving the stability of the operation of the entire compressor and the life of the entire compressor.

[0006] A first aspect of the present invention provides a scroll compressor comprising:

[0007] front shell;

[0008] The rear housing is provided with a bearing bracket and a first cavity capable of accommodating at least one controller power module;

[0009] 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;

[0010] a flow guide unit, provided on an end surface of the bearing support facing away from the first cavity;

[0011] The air guide unit and the end surface of the bearing bracket form a channel with a wedge-shaped structure, and the large end surface of the wedge-shaped structure is arranged opposite to the air intake.

[0012] According to the first aspect of the present invention, the projection of the large end surface of the wedge-shaped structure on the shell covers the projection of the air intake port on the shell, and the ratio of the projected area of the air intake port on the shell to the projected area of the large end surface of the wedge-shaped structure on the shell is greater than or equal to 90%.

[0013] According to the first aspect of the present invention, the gap between the large end surface of the wedge-shaped structure and the air intake is 0 mm to 2 mm; and / or

[0014] The gap between the guide unit and the end surface of the bearing bracket is 0 mm to 2 mm.

[0015] According to the first aspect of the present invention, the inclination angle of the wedge-shaped structure is greater than or equal to 10°.

[0016] According to the first aspect of the present invention, at least one heat dissipation rib is provided on the end surface of the bearing bracket that forms a wedge-shaped channel with the air guide unit.

[0017] According to the first aspect of the present invention, the at least one heat dissipation rib extends in a direction from the air intake to the compressor bearing; and / or

[0018] The thickness of the at least one heat dissipation rib is 1 mm to 5 mm; and / or

[0019] The minimum distance between the at least one heat dissipation rib and the air guide unit is less than 2 mm.

[0020] According to the first aspect of the present invention, the air guide unit further comprises a baffle, which is arranged on a side of the air guide unit away from the air inlet, and an angle between the baffle and an end face of the bearing bracket is adjustable.

[0021] According to the first aspect of the present invention, the guide unit includes an inclined surface, two side plates connected to the inclined surface, and a connecting piece connected to the side plates, and the guide unit is connected to the end surface of the bearing bracket through the connecting piece.

[0022] According to the first aspect of the present invention, the guide unit further includes a baffle and an elastic connector;

[0023] Two ends of the elastic connecting member are respectively connected to the guide unit and the end surface of the baffle facing the bearing bracket.

[0024] According to the first aspect of the present invention, the compressor further comprises at least one controller power module disposed in the first cavity; and

[0025] The at least one controller power module is arranged on the back side of the end surface of the bearing bracket that forms a wedge-shaped channel with the guide unit.

[0026] The air intake of the scroll compressor is provided with a guide unit with a simple structure and easy installation. When the refrigerant enters the suction chamber of the compressor, the temperature of the controller power module of the compressor control system installed on the opposite side can be effectively reduced, thereby improving the stability of the operation of the entire compressor, the service life of the entire compressor and the cost of the entire compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 1 is a schematic diagram of a partial structure of a scroll compressor according to an embodiment of the present invention;

[0029] Figure 2 A top view of a bearing support of a scroll compressor according to an embodiment of the present invention;

[0030] Figure 3 A partial cross-sectional view of a scroll compressor according to a first embodiment of the present invention;

[0031] Figure 4 This is a schematic structural diagram of a flow guide unit according to a first embodiment of the present invention;

[0032] Figure 5 and Figure 6 A top view of a bearing bracket of a scroll compressor according to different embodiments of the present invention Figure 7 is a structural schematic diagram of a flow guide unit according to a second embodiment of the present invention;

[0033] Figure 8 and Figure 9 A cross-sectional view of a guide unit according to a third embodiment of the present invention and a structural diagram of the guide unit combined with a bearing bracket are provided respectively; and

[0034] Figure 10 and Figure 11 They are diagrams showing different states of the air guide unit according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The present invention provides a scroll compressor, which includes a front shell; a rear shell provided with a bearing support and a first cavity capable of accommodating at least one controller power module; a hollow shell connecting the front shell and the rear shell, wherein an air intake port is provided at one end of the shell connected to the rear shell; a flow guide unit provided on the end face of the bearing support facing away from the first cavity; the flow guide unit and the end face of the bearing support form a wedge-shaped channel, wherein the large end face of the wedge-shaped structure is arranged opposite to the air intake port. The air intake port of the scroll compressor of the present invention is provided with a flow guide unit, which has a simple structure and is easy to install, effectively reducing the cost of the entire compressor. More importantly, the flow guide unit allows the refrigerant to pass through the channel formed by the flow guide unit and the bearing support before entering the compression chamber suction chamber, thereby effectively reducing the temperature of the controller power module of the compressor control system installed on the opposite side thereof, thereby improving the stability of the operation of the entire compressor and the service life of the entire compressor.

[0041] 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.

[0042] Figures 1 to 3The figures are respectively a partial structural diagram of a scroll compressor according to an embodiment of the present invention, a top view of a bearing support of the scroll compressor, and a partial cross-sectional view. Specifically, the scroll compressor includes:

[0043] Front shell (not in Figure 1 shown in );

[0044] The rear housing 1 is provided with a bearing bracket 11 and a first cavity C capable of accommodating at least one controller power module;

[0045] A hollow shell 2 is connected to the front shell and the rear shell 1, and an air inlet 9 is provided at one end of the shell 2 connected to the rear shell 1;

[0046] The guide unit 3 is provided on the end surface of the bearing bracket 11 facing away from the first cavity C; Figure 4 This is a schematic structural diagram of the guide unit of the first embodiment of the present invention. The guide unit 3 and the end surface of the bearing support 11 form a wedge-shaped channel, and the large end surface of the wedge-shaped structure is arranged opposite to the air intake 9. More specifically, in the first embodiment, the guide unit 3 includes an inclined surface 31, two side plates 32 connected to the inclined surface 31, and a connecting member 33 connected to the side plates 32. The guide unit 3 is connected to the end surface of the bearing support 11 through the connecting member 33. The connection method can be as follows: Figure 4 As shown, bolt holes are provided in the connecting member 33, and the connecting member 33 is bolted to the end face of the bearing bracket 11. When the scroll compressor of the present invention is in operation, when the refrigerant enters the compressor suction cavity from the suction port, due to the presence of the guide unit, it will not quickly enter the working chamber, but will flow directly along the flow channel of the guide unit to the end face of the bearing bracket, forcibly cooling the position of the controller power module of the controller.

[0047] The wedge-shaped channel formed by the air guide unit and the end face of the bearing support 11 in the first embodiment has a wedge-shaped structure, and the wedge-shaped structure extends from the air intake 9 to the bearing seat 111. It is rectangular in cross-section perpendicular to the end face of the bearing support 11, and the rectangular cross-section gradually becomes smaller in the direction from the air intake 9 to the bearing seat 111. It should be noted that the wedge-shaped structure here only means that the cross-section of the channel gradually becomes smaller in the direction from the air intake 9 to the bearing seat 111. The cross-section of the channel of the wedge-shaped structure is not limited to a rectangle. In some other embodiments, the cross-section of the channel formed by the air guide unit and the end face of the bearing support 11 is a circular part, such as a semicircle. The inclination angle of the wedge-shaped structure is greater than or equal to 10°. For the first embodiment, the inclination angle of the wedge-shaped structure is the angle between the inclined surface 31 and the end face of the bearing support 11.

[0048] The projection of the large end face of the wedge-shaped structure on the shell 2 covers the projection of the air intake port 9 on the shell, and the ratio of the projected area of the air intake port on the shell 2 to the projected area of the large end face of the wedge-shaped structure on the shell is greater than or equal to 90%. The gap between the large end face of the wedge-shaped structure and the air intake port 9 is 0mm to 2mm, that is, the air guide unit 3 can be directly connected to the shell 2, or a certain gap can be provided between the air guide unit 3 and the air intake port 9 in order to reduce manufacturing costs. Therefore, the projected area of the air intake port 9 on the shell 2 can be the area of the air intake port passing through the shell 2, and the projected area of the large end face of the wedge-shaped structure on the shell 2 can be regarded as the large end face (or extending toward the shell 2) connected thereto and forming an enclosed area. Due to the manufacturing process and the structure of the end face of the bearing bracket 11, there can also be a certain gap between the air guide unit 3 and the end face of the bearing bracket 11, and the gap can be 0mm to 2mm.

[0049] In order to further improve the cooling effect of the wedge-shaped channel formed by the guide unit and the end surface of the bearing bracket 11, in some embodiments, the end surface of the bearing bracket that forms the wedge-shaped channel with the guide unit is provided with at least one heat dissipation rib. Figure 5 and Figure 6 1 is a top view of a bearing bracket of a scroll compressor according to different embodiments of the present invention. Figure 5 A heat dissipation rib 112a extends from the air inlet to the compressor bearing. The heat dissipation rib 112a is a strip-shaped raised structure or a wave-shaped raised structure. The thickness of the heat dissipation rib (the size of the raised structure above the end face of the bearing bracket) can be 1mm to 5mm. The number of heat dissipation ribs is not limited and can be as follows: Figure 6 In the embodiment, three heat dissipation ribs 112b are included. The number of heat dissipation ribs can be determined based on the size of the channel. Furthermore, the minimum distance between the heat dissipation ribs and the guide unit is less than 2 mm. For example, at the end of the channel near the bearing seat, the distance between the inclined surface 31 and the heat dissipation ribs is less than 2 mm.

[0050] Figure 7 Schematic diagram of the structure of the guide unit of the second embodiment of the present invention. The guide unit 3 of the second embodiment includes an inclined surface 31, two side plates 32 connected to the inclined surface 31, a connecting member 33 connected to the side plates 32, and a baffle 34a.

[0051] Figure 8 and Figure 9The figures are a cross-sectional view of a guide unit according to a third embodiment of the present invention and a schematic diagram of a partial structure thereof when used in a compressor. The guide unit 3b of the third embodiment includes an inclined surface 31, two side panels 32 connected to the inclined surface 31, a connector 33 connected to the side panels 32, a baffle 34b, and an elastic connector 35. The ends of the elastic connector 35 respectively connect the guide unit 3 and the end surface of the baffle 34b facing the bearing bracket 11. In this embodiment, the baffle 34b is disposed on the side of the guide unit 3 away from the air intake 9, and the angle between the baffle 34b and the end surface of the bearing bracket 11 is adjustable. The baffle 34b is connected to the inclined surface 31 via an elastic connector 35, allowing the baffle 34b to rotate and reset. Figure 10 and Figure 11 , which are different state diagrams of the guide unit of the third embodiment of the present invention. When the scroll compressor rotates at a low speed, the elastic connecting member 35 of the guide unit of the third embodiment is in a contracted state ( Figure 10 ), the baffle 34b makes the air inlet area of the guide unit 3b much larger than the air outlet area, the flow rate of the refrigerant through the guide unit 3b is increased, and the heat dissipation effect of the guide unit 3b on the end surface of the bearing bracket 11 is enhanced; when the scroll compressor rotates at high speed, the air flow hits the baffle 34b and causes it to open upward ( Figure 11 ), significantly increasing the outlet area of the air guide unit 3. This reduces gas pressure drop and pressure loss while maintaining heat dissipation at this end face of the bearing bracket 11. When the compressor speed drops from high to low, the baffle automatically resets due to the elasticity of the elastic connector 35.

[0052] In actual use, the compressor further includes at least one controller power module 8 disposed in the first cavity C, and the at least one controller power module 8 is disposed on the back side of the end surface of the bearing bracket 11 that forms a wedge-shaped channel with the air guide unit 3. The air guide unit accelerates the flow of refrigerant from the compressor suction port into the compressor suction cavity, forcibly cooling the location of the controller power module.

[0053] The test results of the scroll compressor of the present invention show that the setting of the heat dissipation ribs on the end surface of the guide unit and the bearing bracket 11 has a good heat dissipation effect. Compared with the existing compressor, at the same working conditions and low speed, the temperature of the controller power module 8 can be reduced by 10-13°C at low speed, and the temperature of the controller power module 8 can be reduced by 3~5° at high speed.

[0054] 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 bracket and a first cavity for accommodating at least one controller 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 flow guide unit, provided on an end surface of the bearing support facing away from the first cavity; The guide unit and the end surface of the bearing bracket form a wedge-shaped channel, and the large end surface of the wedge-shaped structure is arranged opposite to the air intake; The projection of the large end surface of the wedge-shaped structure on the shell covers the projection of the air inlet on the shell, and the ratio of the projected area of the air inlet on the shell to the projected area of the large end surface of the wedge-shaped structure on the shell is greater than or equal to 90%; The end surface of the bearing bracket forming a wedge-shaped channel with the guide unit is provided with at least one heat dissipation rib; The at least one heat dissipation rib extends in a direction from the air intake to the compressor bearing; and / or The thickness of the at least one heat dissipation rib is 1 mm to 5 mm; and / or The minimum distance between the at least one heat dissipation rib and the air guide unit is less than 2 mm.

2. The scroll compressor according to claim 1, wherein: The gap between the large end surface of the wedge-shaped structure and the air intake is 0 mm to 2 mm; and / or The gap between the guide unit and the end surface of the bearing bracket is 0 mm to 2 mm.

3. The scroll compressor according to claim 1, wherein: The inclination angle of the wedge-shaped structure is greater than or equal to 10°.

4. The scroll compressor according to claim 1, wherein The air guide unit further includes a baffle, which is arranged on a side of the air guide unit away from the air inlet, and an angle between the baffle and an end surface of the bearing bracket is adjustable.

5. The scroll compressor according to claim 1, wherein: The guide unit includes an inclined surface, two side plates connected to the inclined surface, and a connecting piece connected to the side plates. The guide unit is connected to the end surface of the bearing bracket through the connecting piece.

6. The scroll compressor according to claim 5, characterized in that The guide unit further includes a baffle and an elastic connecting member; Two ends of the elastic connecting member are respectively connected to the guide unit and the end surface of the baffle facing the bearing bracket.

7. The scroll compressor according to claim 5, wherein: The compressor further includes at least one controller power module disposed in the first cavity; and The at least one controller power module is arranged on the back side of the end surface of the bearing bracket that forms a wedge-shaped channel with the guide unit.

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