Scroll compressor structure and scroll compressor

Abstract

The application relates to the technical field of scroll compressors, in particular to a scroll compressor structure and a scroll compressor. The scroll compressor structure comprises a pipe shell, an annular cavity is formed in the middle of the pipe shell, a fin assembly is arranged at the annular cavity, the annular cavity is arranged at the outer periphery of a motor of the scroll compressor; and a flow guide ring groove is arranged at the inner periphery side of the pipe shell, the flow guide ring groove is located between the motor and a lower rack of the scroll compressor, the groove opening of the flow guide ring groove faces the bottom of the motor, and an oil collecting flow through hole is arranged at the bottom of the flow guide ring groove. The scroll compressor structure and the scroll compressor can solve the problems that the scroll compressor is difficult to control the oil discharge amount and the motor temperature rise under the condition that the refrigerant flow speed is relatively high.

Description

Technical Field

[0001] This application relates to the field of scroll compressor technology, and in particular to a scroll compressor structure and a scroll compressor. Background Technology

[0002] Scroll compressors are widely used in refrigeration systems due to their large cooling capacity and low vibration. Currently, with the increase in scroll compressor speed, the refrigerant flow rate inside the compressor also increases dramatically, leading to a greater oil discharge. Furthermore, the increased speed of the scroll compressor also causes an increase in motor heat generation, potentially leading to high-temperature demagnetization. Therefore, how to increase compressor speed while reducing oil discharge and controlling motor temperature rise has become a hot topic in the industry.

[0003] Existing compressors rely on the rotation of the crankshaft and counterweight to drive the refrigerant rotation for oil separation, and a lower frame is installed at the bottom of the compressor to prevent the refrigerant from directly impacting the oil sump. Motor temperature control is achieved by cooling the motor through refrigerant flushing. However, with further increases in compressor speed, the above-mentioned traditional solutions are no longer sufficient to control oil output and motor temperature rise, and this has become a major problem in the development of high-speed compressors. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a scroll compressor structure and a scroll compressor to solve the problem that the scroll compressor is difficult to control the oil discharge and motor temperature rise when the refrigerant flow rate is fast.

[0005] According to a first aspect of the present invention, a scroll compressor structure is provided, wherein the scroll compressor structure includes: a casing, an annular cavity formed in the middle of the casing, a fin assembly disposed in the annular cavity, the annular cavity being disposed on the outer periphery of a motor of the scroll compressor; and a guide ring groove disposed on the inner periphery of the casing, the guide ring groove being located between the motor and the lower frame of the scroll compressor, the groove opening of the guide ring groove facing the bottom of the motor, and an oil collection flow hole being disposed at the bottom of the guide ring groove.

[0006] Preferably, the shell includes a straight wall portion and an annular protrusion portion, the annular protrusion portion protruding radially from the straight wall portion, and the annular cavity formed between the annular protrusion portion and the straight wall portion.

[0007] Preferably, the stator of the motor has multiple slots on its outer periphery, and the straight wall portion has multiple connecting ports at positions corresponding to the multiple slots. The connecting ports and the slots connect the annular cavity and the inner side of the straight wall portion, and the multiple connecting ports are arranged at intervals along the circumference of the straight wall portion.

[0008] Preferably, the fin assembly includes: an inner fin, formed in an annular shape, the inner fin being disposed on the inner peripheral side of the annular cavity, and a plurality of the inner fins being disposed axially spaced within the annular cavity; and an outer fin, formed in an annular shape, the outer fin being disposed on the outer peripheral side of the annular cavity, and a plurality of the outer fins being disposed axially spaced on the annular protrusion.

[0009] Preferably, the plurality of inner fins and the plurality of outer fins are arranged in a one-to-one correspondence in the axial direction, the outer fins have radially recessed outer annular grooves on their outer periphery, and the inner fins have radially recessed inner annular grooves on their inner periphery.

[0010] Preferably, the scroll compressor structure further includes multiple spiral guide plates, which are arranged one-to-one below the multiple connecting ports. The first end of each spiral guide plate is connected to the bottom edge of the connecting port, and the second end of each spiral guide plate is lower than the first end of the spiral guide plate.

[0011] Preferably, the side of the spiral guide plate is in close contact with the inner circumferential surface of the straight wall portion, and the side of the spiral guide plate facing the communication port is formed as an arc-shaped concave surface.

[0012] Preferably, the flow guide groove is a semi-circular annular plate, the outer periphery of the flow guide groove is connected to the inner wall of the tube shell, the motor includes a stator and a rotor, a gap is formed between the stator and the rotor, and the flow guide groove is located directly below the gap.

[0013] Preferably, there are multiple oil collection and flow holes, which are arranged circumferentially at intervals at the bottom of the guide ring groove.

[0014] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes the scroll compressor structure described above.

[0015] The scroll compressor structure and scroll compressor of this invention have an annular cavity formed in the middle of the casing, and a fin assembly is provided in the annular cavity. The annular cavity is located on the outer periphery of the motor of the scroll compressor, so that when the fluid flows between the stator of the motor and the casing, the flow velocity is reduced by the influence of the fin assembly, and the fluid can exchange heat with the fin assembly to reduce the temperature of the fluid. A guide ring groove is provided on the inner periphery of the casing and is located between the motor and the lower frame of the scroll compressor. After passing through the annular cavity, the fluid flows into the guide ring groove, thereby preventing the fluid from directly impacting the lower frame and agitating the oil in the oil sump. The groove opening of the guide ring groove faces the bottom of the motor, so that the fluid can complete the rotation under the guidance of the guide ring groove and flow towards the motor to cool the motor. An oil collection and flow hole is provided at the bottom of the guide ring groove, so that the oil separated by centrifugal force during the rotation can flow out through the oil collection and flow hole. This effectively solves the problem of scroll compressors struggling to control oil output and motor temperature rise when the refrigerant flow rate is high.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the scroll compressor structure and the scroll compressor according to the present invention.

[0019] Figure 2 This is a partial cross-sectional view of the scroll compressor structure and the scroll compressor according to the present invention.

[0020] Figure 3 This is a schematic diagram of the casing of the scroll compressor structure according to the present invention.

[0021] Figure 4 This is a cross-sectional view of the casing of the scroll compressor structure according to the present invention.

[0022] Reference numerals: 1-Shell; 11-Straight wall section; 110-Connecting port; 12-Annular protrusion; 120-Annular cavity; 2-Guide ring groove; 20-Oil collection and flow hole; 3-Fin assembly; 31-Inner fin; 310-Inner annular groove; 32-Outer fin; 320-Outer annular groove; 4-Helical guide plate; 5-Motor; 51-Stator; 510-Slot; 52-Rotor; 6-Lower frame; 7-Crankshaft. Detailed Implementation

[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0027] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0028] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0032] like Figures 1 to 4 As shown, according to a first aspect of the present invention, a scroll compressor structure is provided, the scroll compressor structure including a casing 1 and a flow guide annular groove 2.

[0033] In the following description, reference will be made to Figures 1 to 4 The specific structure of the aforementioned components and their connection relationships are described in detail.

[0034] like Figures 1 to 4 As shown, in this embodiment, an annular cavity 120 can be formed in the middle of the casing 1, and a fin assembly 3 is provided in the annular cavity 120. The annular cavity 120 can be located on the outer periphery of the motor 5 of the scroll compressor, so that when the fluid flows between the stator 51 of the motor 5 and the casing 1, it will be affected by the fin assembly 3 and its flow rate will be reduced. At the same time, the fluid can exchange heat with the fin assembly 3 to reduce the temperature of the fluid. The guide ring groove 2 can be located on the inner periphery of the casing 1, between the motor 5 and the lower frame 6 of the scroll compressor. After passing through the annular cavity 120, the fluid will flow into the guide ring groove 2, thereby preventing the fluid from directly impacting the lower frame 6 and stirring up the oil in the oil sump. The groove opening of the guide ring groove 2 faces the bottom of the motor 5, so that the fluid can complete the rotation and flow to the motor 5 under the guiding action of the guide ring groove 2 to cool the motor 5. The bottom of the guide ring groove 2 is provided with an oil collection and flow hole 20, which allows the oil separated by centrifugal force during the fluid rotation to flow out through the oil collection and flow hole 20. This effectively solves the problem of the scroll compressor's difficulty in controlling the oil discharge and the temperature rise of the motor 5 when the refrigerant flow rate is high.

[0035] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the shell 1 may include a straight wall portion 11 and an annular protrusion 12. The straight wall portion 11 may be approximately cylindrical, with components such as the motor 5 disposed inside the straight wall portion 11. The annular protrusion 12 may protrude radially from the straight wall portion 11, and an annular cavity 120 is formed between the annular protrusion 12 and the straight wall portion 11. The axial length of the annular protrusion 12 can be set according to the length of the stator 51 of the motor 5, so that heat exchange can be effectively achieved when the fluid flows through the gap between the stator 51 and the shell 1.

[0036] Furthermore, preferably, such as Figures 1 to 3As shown, in this embodiment, multiple slots 510 (i.e., grooves opened along the cut surface) can be provided on the outer peripheral surface of the stator 51 of the motor 5. Multiple connecting ports 110 can be provided at positions corresponding to the multiple slots 510 on the straight wall portion 11. The connecting ports 110 can be rectangular openings, and their axial length can be equal to the axial length of the annular protrusion 12. The annular cavity 120 is connected to the inner side of the straight wall portion 11 through the connecting ports 110 and the slots 510, allowing fluid to flow into the annular cavity 120 through the top of the connecting ports 110 for heat exchange, and allowing the heat-exchanged fluid to flow out from the bottom of the connecting ports 110 to the inner side of the straight wall portion 11. The multiple connecting ports 110 can be arranged at intervals along the circumference of the straight wall portion 11 to ensure efficient heat exchange of the fluid. The number of connecting ports 110 can be less than or equal to the number of slots 510, that is, the connecting ports 110 and the slots 510 may only correspond in position, but not in number. The wall between two adjacent connecting ports 110 can be used to install and fix the stator 51 of the motor 5, and the wall can also serve to ensure the structural strength of the casing 1.

[0037] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the fin assembly 3 may include inner fins 31 and outer fins 32. The inner fins 31 may be annular. The inner fins 31 are disposed on the inner periphery of the annular cavity 120 and integrally formed with the inner sidewall of the annular protrusion 12. Multiple inner fins 31 may be arranged axially spaced within the annular cavity 120. The radial width of the inner fins 31 is not greater than the radial width of the annular cavity 120 to avoid interference between the inner fins 31 and the straight wall portion 11. The outer fins 32 may be annular. The outer fins 32 are disposed on the outer periphery of the annular cavity 120 and integrally formed with the outer sidewall of the annular protrusion 12. Multiple outer fins 32 may be arranged axially spaced on the annular protrusion 12 to improve the heat transfer effect of the fluid. When fluid passes through the annular cavity 120, the inner fins 31 impede the flow of the fluid, thereby reducing the fluid velocity and improving the oil separation effect and heat exchange effect during subsequent flow. The fluid can exchange heat with the inner fins 31, which in turn can exchange heat with the outside environment through the outer fins 32, thereby cooling the fluid and improving the cooling effect of the fluid on the motor 5.

[0038] Furthermore, preferably, such as Figures 1 to 4As shown, in this embodiment, multiple inner fins 31 and multiple outer fins 32 can be arranged in a one-to-one correspondence in the axial direction, that is, each inner fin 31 has an outer fin 32 corresponding to its outer periphery, in order to improve the heat dissipation speed of the inner fins 31. The radial width of the outer fin 32 can be greater than the radial width of the inner fins 31, so that the outer fin 32 can exchange heat with the outside environment at a faster speed.

[0039] Further optimized, such as Figures 1 to 4 As shown, in this embodiment, a radially recessed outer annular groove 320 may be formed on the outer periphery of the outer fin 32. The outer annular groove 320 may be located at the center of the outer fin 32 in the axial direction. The radial depth of the outer annular groove 320 is less than the radial width of the outer fin 32 to prevent the outer annular groove 320 from extending to the annular protrusion 12, which would affect the structural strength. The outer annular groove 320 effectively improves the heat exchange effect between the outer fin 32 and the external environment. Similarly, a radially recessed inner annular groove 310 may be formed on the inner periphery of the inner fin 31. The inner annular groove 310 may be located at the center of the inner fin 31 in the axial direction. The radial depth of the inner annular groove 310 is less than the radial width of the inner fin 31 to prevent the inner annular groove 310 from extending to the annular protrusion 12, which would affect the structural strength. The inner annular groove 310 effectively improves the heat exchange effect between the inner fin 31 and the fluid, thereby reducing the fluid temperature.

[0040] Preferred, such as Figure 2 and Figure 4 As shown, in this embodiment, the scroll compressor structure may further include multiple spiral guide plates 4. These spiral guide plates 4 can be arranged one-to-one below the multiple connecting ports 110. The first end of each spiral guide plate 4 can be connected to the bottom edge of the connecting port 110, allowing the fluid flowing out from the bottom side of the connecting port 110 to be blocked by the spiral guide plate 4, thereby changing its flow direction. The second end of each spiral guide plate 4 is lower than its first end, causing the fluid to spirally descend along the inner wall of the casing 1 under the guiding action of the spiral guide plate 4. This reduces the fluid velocity and allows for oil separation under centrifugal force.

[0041] Furthermore, preferably, such as Figure 2 and Figure 4As shown, in this embodiment, the side of the spiral guide plate 4 can be closely attached to the inner circumferential surface of the straight wall portion 11, that is, the extension trajectory of the spiral guide plate 4 is formed in an arc shape to promote the spiral descent of the fluid. The spiral guide plate 4 can be inclined, the top surface of the spiral guide plate 4 can face the communication port 110, and the side of the spiral guide plate 4 facing the communication port 110 can be formed into an arc-shaped concave surface to further improve the guiding effect of the spiral guide plate 4 and facilitate the welding of the side of the spiral guide plate 4 to the inner circumferential surface of the straight wall portion 11.

[0042] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the flow guide groove 2 can be a semi-circular annular plate with its top forming an open side (i.e., the flow guide groove 2 is formed as a lower semi-circular ring). The outer periphery of the flow guide groove 2 can be welded to the inner wall surface of the straight wall portion 11 of the casing 1, and the flow guide groove 2 surrounds the outer periphery of the crankshaft 7. The motor 5 includes a stator 51 and a rotor 52. A gap is formed between the stator 51 and the rotor 52, allowing the fluid to be redirected under the guiding action of the flow guide groove 2, and then flow through the gap between the stator 51 and the rotor 52 to cool the motor 5. The flow guide groove 2 is located directly below the gap, thus effectively guiding the airflow to the gap between the stator 51 and the rotor 52.

[0043] Further optimized, such as Figure 2 As shown in the embodiment, the number of oil collection and flow holes 20 can be multiple, and the multiple oil collection and flow holes 20 can be arranged circumferentially at intervals at the bottom of the guide ring groove 2. Simultaneously, the multiple oil collection and flow holes 20 can also be arranged radially at intervals at the bottom of the guide ring groove 2 to improve the oil outflow efficiency. When the fluid rotates under the guiding action of the guide ring groove 2, the oil in the fluid will separate under the action of centrifugal force and be collected in the guide ring groove 2. Finally, the oil will flow out through the oil collection and flow holes 20.

[0044] In addition, such as Figures 1 to 4 As shown, according to a second aspect of the present invention, a scroll compressor is provided, the scroll compressor comprising the scroll compressor structure described above.

[0045] During operation, the refrigerant fluid is discharged from the stator's exhaust port, flows through the through-hole between the frame and the tube shell 1 to the cavity containing the exhaust pipe, and is discharged from the exhaust pipe. A portion of the refrigerant fluid flows through the gap between the stator 51 and the tube shell 1, entering the annular cavity 120 through the connecting port 110. The refrigerant fluid is slowed and cooled by the inner fins 31, then flows out from the bottom side of the connecting port 110 and spirals downwards under the guidance of the spiral guide plate 4. Then, the refrigerant fluid reaches the outer periphery of the guide ring groove 2 and rotates under the guidance of the guide ring groove 2, flowing from the outer periphery to the inner periphery of the guide ring groove 2, and then flows through the gap between the stator 51 and the rotor 52 to cool the motor 5. Finally, the refrigerant fluid that has completed heat exchange with the motor 5 is discharged from the exhaust pipe. During the refrigerant fluid rotation process, the oil in the refrigerant fluid will be separated under the action of centrifugal force and collected in the guide ring groove 2. Finally, the oil will flow out through the oil collection flow hole 20 to the lower frame 6 and flow into the lower oil pool of the scroll compressor.

[0046] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A scroll compressor structure, disposed in a scroll compressor, characterized in that, The scroll compressor structure includes: A casing, wherein an annular cavity is formed in the middle of the casing, and a fin assembly is disposed in the annular cavity, the annular cavity being disposed on the outer periphery of the motor of the scroll compressor; and A flow guide groove is provided on the inner circumference side of the tube shell. The flow guide groove is located between the motor and the lower frame of the scroll compressor. The groove opening of the flow guide groove faces the bottom of the motor. An oil collection and flow hole is provided at the bottom of the flow guide groove. The shell includes a straight wall portion and an annular protrusion portion, the annular protrusion portion protruding radially from the straight wall portion, and the annular cavity formed between the annular protrusion portion and the straight wall portion; The stator of the motor has multiple slots on its outer periphery, and the straight wall portion has multiple connecting ports at positions corresponding to the multiple slots. The connecting ports and the slots connect the annular cavity and the inner side of the straight wall portion, and the multiple connecting ports are arranged at intervals along the circumference of the straight wall portion. The fin assembly includes: The inner fins are formed in annular shape and are disposed on the inner circumferential side of the annular cavity. A plurality of the inner fins are disposed axially spaced within the annular cavity.

2. The scroll compressor structure according to claim 1, characterized in that, The fin assembly further includes: The outer fins are formed into annular shapes and are disposed on the outer periphery of the annular cavity. A plurality of the outer fins are disposed axially spaced on the annular protrusion.

3. The scroll compressor structure according to claim 2, characterized in that, Multiple inner fins and multiple outer fins are arranged in a one-to-one correspondence in the axial direction. The outer fins have radially recessed outer annular grooves on their outer periphery, and the inner fins have radially recessed inner annular grooves on their inner periphery.

4. The scroll compressor structure according to claim 1, characterized in that, The scroll compressor structure also includes multiple spiral guide plates, which are arranged one-to-one below the multiple communication ports. The first end of each spiral guide plate is connected to the bottom edge of the communication port, and the second end of each spiral guide plate is lower than the first end of the spiral guide plate.

5. The scroll compressor structure according to claim 4, characterized in that, The side of the spiral guide plate is in close contact with the inner circumferential surface of the straight wall portion, and the side of the spiral guide plate facing the communication port is formed into an arc-shaped concave surface.

6. The scroll compressor structure according to claim 1, characterized in that, The flow guide groove is a semi-circular annular plate. The outer periphery of the flow guide groove is connected to the inner wall of the tube shell. The motor includes a stator and a rotor. A gap is formed between the stator and the rotor. The flow guide groove is located directly below the gap.

7. The scroll compressor structure according to claim 1, characterized in that, The number of oil collection and flow holes is multiple, and the multiple oil collection and flow holes are arranged circumferentially at intervals at the bottom of the guide ring groove.

8. A scroll compressor, characterized in that, The scroll compressor includes the scroll compressor structure according to any one of claims 1 to 7.

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