Scroll compressor and air conditioning system

Abstract

The present application provides a scroll compressor and an air conditioning system. The scroll compressor (100) includes a casing (11), a compression mechanism (12), a main frame (14), a motor (13), a crankshaft (16), a main balance weight (15), and an exhaust pipe (20). In the radial direction of the casing (11), the depth of the exhaust pipe (20) into the casing (11) is W, and the distance between the outer circle of the main balance weight (15) and the inner wall of the casing (11) is L, where 0.47≦W / L≦0.93 holds. Therefore, a high-pressure oil-gas mixture generated in the compression mechanism (12) is partly discharged via cyclone separation by the main balance weight (15) and mechanical separation by the casing (11), and another part enters axial passages such as the gap between the stator (132) and the rotor (131), cools the motor (13), achieves oil-gas separation, and is then discharged again, thereby reducing the oil circulation rate.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application bearing application number 202210101544.1 and entitled "Scroll Compressor and Air Conditioning System" filed with the State Intellectual Property Office of the People's Republic of China on January 27, 2022, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of compressors, and more particularly to scroll compressors and air conditioning systems. [Background technology]

[0003] The description herein is merely for providing background information related to the present application and does not necessarily constitute prior art. During the operation of the scroll compressor, the mixture of refrigerant and oil entering from the intake pipe is compressed into a high-pressure oil-gas mixture in a compression chamber formed by the combination of a fixed scroll and a movable scroll. At present, the exhaust pipes of the scroll compressor are all installed in the casing between the main frame and the stator, so that a part of the high-pressure oil-gas mixture is discharged from the compressor without effective oil-gas separation. The other part of the high-pressure oil-gas mixture enters the cavity between the main frame and the stator and is discharged from the compressor without effective secondary separation with the casing wall, so that the oil circulation rate in the total exhaust of the compressor is relatively high, which reduces the efficiency of the air conditioning system and affects the reliability of the compressor and the air conditioning system. Summary of the Invention [Problem to be solved by the invention]

[0004] The objective of the embodiments of the present application is to provide a scroll compressor that solves the problems of poor oil-gas separation effect of high pressure oil-gas mixture in the prior art scroll compressor, high oil circulation rate, which affects the reliability of the compressor and the air conditioning system, and reduces the efficiency of the air conditioning system. [Means for solving the problem]

[0005] The technical solutions adopted in the embodiments of the present application are as follows: The first aspect provides a scroll compressor including a casing, a compression mechanism, a main frame, a motor, a crankshaft, a main balance weight, and an exhaust pipe, wherein the main frame is located between the compression mechanism and the motor, the main balance weight is fitted to the crankshaft, the main balance weight is located between the motor and the main frame, one end of the exhaust pipe penetrates the casing and extends toward an outer circumferential wall of the main balance weight, and one end of the exhaust pipe that enters the casing is located between the main frame and the motor, and wherein, in the radial direction of the casing, a depth of the exhaust pipe into the casing is W and a distance between the outer circumferential wall of the main balance weight and an inner wall of the casing is L, where W is the depth of the exhaust pipe into the casing and L is the distance between the outer circumferential wall of the main balance weight and an inner wall of the casing, and 0.47≦W / L≦0.93 is satisfied.

[0006] In one selectable embodiment, the motor includes a rotor and a stator, the crankshaft passes through the rotor and is connected to the compression mechanism, the stator is attached to the casing, and the stator includes an iron core attached in the casing, where H is the distance between the lower end surface of the main frame and the upper end surface of the iron core in the axial direction of the crankshaft, and h is the distance between the central axis of the exhaust pipe and the upper end surface of the iron core, and 0.17≦h / H≦0.62.

[0007] In one alternative embodiment, the section of the exhaust pipe proximate to the crankshaft is a tapered pipe section, the inner diameter of one end of the tapered pipe section proximate to the crankshaft being smaller than the inner diameter of the other end of the tapered pipe section.

[0008] In one alternative embodiment, the cross-sectional area of ​​the tapered tube section at one end close to the crankshaft is S i and the cross-sectional area of ​​the end of the tapered tube section farther from the crankshaft is S o Then, 0.50≦S i / S o ≦1.00.

[0009] In one alternative embodiment, the exhaust pipe includes a straight pipe section disposed through the casing.

[0010] In one optional embodiment, the straight pipe section is provided with a positioning structure for stopping and positioning the insertion depth of the exhaust pipe into the casing, and the positioning structure is located on the outer circumferential surface of the straight pipe section.

[0011] In one optional embodiment, the positioning structure is a rib ring provided on the straight pipe section, or the positioning structure includes a number of positioning protrusions provided on the outer circumferential surface of the straight pipe section.

[0012] In one alternative embodiment, the positioning structure is a ring base provided on the straight pipe section, and the ring base is connected to the outer surface of the casing by welding.

[0013] In one alternative embodiment, the end face of the ring base close to the casing presents an arcuate surface that fits the outer surface of the casing.

[0014] In one alternative embodiment, the outer surface of the casing is provided with a press-welded plane, and one end face of the ring base close to the casing presents a plane that matches the press-welded plane.

[0015] In one alternative embodiment, the positioning structure is integrally formed with the straight pipe section, or the positioning structure is welded to the straight pipe section.

[0016] A second aspect provides an air conditioning system including the scroll compressor according to any one of the above embodiments. Effect of the Invention

[0017] The scroll compressor according to the embodiment of the present application has the following beneficial effects: In the scroll compressor according to the embodiment of the present application, the depth of the exhaust pipe into the casing is set to 0.47-0.93 times the distance from the outer circular wall of the main balance weight to the inner wall of the casing, so that a part of the high-pressure oil-gas mixture discharged from the compression mechanism enters the exhaust pipe and is discharged after undergoing cyclone separation due to the rotation of the main balance weight and mechanical separation of the casing, and another part enters the axial passage such as the gap between the stator and the rotor, realizing oil-gas separation while cooling the motor, and then is discharged again through the exhaust pipe, so that the gas entering the exhaust pipe is more fully separated into oil and gas, reducing the oil circulation rate, improving the reliability of the scroll compressor, and improving the reliability and efficiency of the air conditioning system using the scroll compressor.

[0018] The beneficial effects of the air conditioning system provided by the embodiment of the present application are as follows: The air conditioning system of the embodiment of the present application uses the scroll compressor of the above embodiment, and has the technical effects of the scroll compressor described above, so they are omitted here.

[0019] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly describes the necessary drawings used in the description of the embodiments or exemplary technologies. The following drawings are only some embodiments of the present application, and it is also obvious to those skilled in the art that they can obtain other related drawings based on these drawings without any creative efforts. [Brief description of the drawings]

[0020] [Figure 1] 1 is a schematic diagram showing a cross-sectional structure of a scroll compressor provided in a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the structure of the exhaust pipe in FIG. [Diagram 3] 3 is a schematic diagram showing a cross-sectional structure of the exhaust pipe in FIG. 2. [Figure 4] FIG. 2 is a schematic diagram showing the structure of an exhaust pipe provided in Example 2 of the present application. [Diagram 5]FIG. 4 is a schematic diagram showing a cross-sectional structure of a scroll compressor provided in a third embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing the structure of the exhaust pipe in FIG. 5. [Figure 7] 6 is a schematic diagram showing a cross-sectional structure of the exhaust pipe in FIG. 5. [Figure 8] FIG. 11 is a schematic diagram showing the structure of an exhaust pipe provided in Example 4 of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present application clearer and easier to understand, the present application will be described in more detail below with drawings and examples. It should be understood that the specific examples described herein are only used to interpret the present application, and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed" or "mounted" to another element, the element may be fixed or mounted to the other element directly or indirectly. When an element is referred to as being "connected" to another element, the element may be directly connected to the other element or indirectly connected to the other element.

[0023] In the description of this application, "plurality" means two or more than two, unless otherwise clearly and specifically limited. "Some" means one or more than one, unless otherwise clearly and specifically limited. The orientations or positional relationships indicated by terms such as "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientations or positional relationships indicated based on the drawings, and are only for facilitating and simplifying the description of this application, and do not indicate or imply that the devices or elements referred to have a particular orientation, are configured and operated in a particular orientation, and therefore should not be understood as limiting this application.

[0024] In the description of this application, unless otherwise expressly specified and limited, the terms "attached", "connected" and "connected" should be generally understood, and may be, for example, a fixed connection, a removable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection or an indirect connection via an intermediate medium, or an internal communication between two elements or an interaction between two elements. A person skilled in the art can understand the specific meaning of the above terms in this application according to the specific situation.

[0025] Reference to "one embodiment," "some embodiments," or "an embodiment" in the specification of this application means that one or more embodiments of the application include the particular feature, structure, or characteristic described in connection with that embodiment. Thus, the appearance of phrases such as "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," and the like in different places throughout this specification do not necessarily all refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Also, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0026] A scroll compressor 100 according to the present application will be described with reference to Fig. 1. The scroll compressor 100 includes a casing 11, a compression mechanism 12, a main frame 14, a motor 13, a crankshaft 16, a main balance weight 15, and an exhaust pipe 20. The compression mechanism 12, the main frame 14, the motor 13, the crankshaft 16, and the main balance weight 15 are all mounted in the casing 11, and the casing 11 protects the compression mechanism 12, the main frame 14, the motor 13, the crankshaft 16, and the main balance weight 15. The exhaust pipe 20 is mounted in the casing 11 and supported by the casing 11, and the compressed high-pressure gas in the casing 11 is discharged for use.

[0027] The compression mechanism 12 is for compressing gas to generate high-pressure gas. The compression mechanism 12 is located above a main frame 14, and is supported by the main frame 14. The motor 13 is for supplying a driving force for driving the compression mechanism 12. The motor 13 is provided below the main frame 14. The crankshaft 16 is connected to the compression mechanism 12 through the motor 13, and the motor 13 drives and rotates the crankshaft 16 to operate the compression mechanism 12.

[0028] The main balance weight 15 is attached to the crankshaft 16 and is located between the motor 13 and the main frame 14. The main balance weight 15 is rotated via the crankshaft 16 to ensure smooth operation of the compression mechanism 12. The main balance weight 15 can also generate a cyclone to separate a portion of the high-pressure oil-gas mixture discharged from the compression mechanism 12 into oil and gas.

[0029] The motor 13 includes a rotor 131 and a stator 132. The stator 132 is attached inside the casing 11 and is supported by the casing 11. The rotor 131 is attached inside the stator 132 and drives the rotor 131 to rotate via the stator 132. The crankshaft 16 is connected to the rotor 131, and the crankshaft 16 penetrates the rotor 131 and is connected to the compression mechanism 12. When the stator 132 drives the rotor 131 to rotate, the crankshaft 16 is rotated, and the compression mechanism 12 is driven.

[0030] One end of the exhaust pipe 20 enters the casing 11, and the exhaust pipe 20 is located between the main frame 14 and the stator 132. There is a large space between the motor 13 and the main frame 14 in the casing 11, and by locating the exhaust pipe 20 in this position, it becomes easier to attach the exhaust pipe 20, and the exhaust pipe 20 can be inserted deeper into the casing 11.

[0031] In the radial direction of the casing 11, if the depth of the exhaust pipe 20 into the casing 11 is W and the distance between the outer circle of the main balance weight 15 and the inner wall of the casing 11 is L, then 0.47≦W / L≦0.93 holds. That is, if the depth of the exhaust pipe 20 into the casing 11 along the radial direction of the casing 11 is W and the distance between the outer circular wall of the main balance weight 15 and the inner wall of the casing 11 is L, then the range of W / L is 0.47 to 0.93, and for example, the value of W / L can be 0.47, 0.50, 0.53, 0.55, 0.57, 0.6, 0.63, 0.65, 0.67, 0.70, 0.73, 0.75, 0.77, 0.80, 0.83, 0.85, 0.87, 0.90, 0.93, etc.

[0032] Furthermore, by setting the W / L range to 0.47 to 0.93, a portion of the high-pressure oil-gas mixture discharged from the compression mechanism 12 is linked between the main frame 14 and the stator 132 by the rotation of the main balance weight 15, generating a cyclone to separate the oil-gas mixture, and this portion of the high-pressure oil-gas mixture collides with the inner wall of the casing 11 and is guided to the casing 11 to flow and be mechanically separated, and the separated gas can be discharged through the exhaust pipe 20. For example, the oil-air mixture present between the main frame 14 and the stator 132 is first separated primarily by the high-speed rotation of the main balance weight 15; the further away from the main balance weight 15 the larger the oil droplets become and the higher their proportion becomes; then the oil-air mixture close to the inner wall surface of the casing 11 collides with the casing 11 again and undergoes secondary separation; however, since the casing 11 is circular, the casing 11 guides the oil-air mixture and rotates it centrifugally, thereby providing a certain degree of oil-air separation function; and finally the separated gas is discharged from the exhaust pipe 20. The other part of the high pressure oil-air mixture enters axial passages such as the gap between the stator 132 and rotor 131 of the motor 13 to cool the motor 13, and also undergoes oil-air separation as it flows. The separated gas is discharged through the exhaust pipe 20, allowing more oil to be separated from the high pressure oil-air mixture discharged from the compression mechanism 12, reducing the oil content in the high pressure gas discharged through the exhaust pipe 20 and reducing the oil circulation rate, thereby improving the reliability of the scroll compressor 100 and improving the reliability and efficiency of an air conditioning system using the scroll compressor 100.

[0033] Compared with the prior art, the scroll compressor 100 provided by the present application has a feature that the depth of the exhaust pipe 20 entering the casing 11 in the scroll compressor 100 of the embodiment of the present application is set to 0.47 to 0.93 times the distance from the outer circular wall of the main balance weight 15 to the inner wall of the casing 11, so that a part of the high-pressure oil-gas mixture discharged from the compression mechanism 12 enters the exhaust pipe 20 and is discharged after passing through cyclone separation due to the rotation of the main balance weight 15 and mechanical separation of the casing 11, and the other part enters the axial passage such as the gap between the stator 132 and the rotor 131, thereby realizing oil-gas separation while cooling the motor 13, and then is discharged through the exhaust pipe 20 again, thereby more fully separating the gas into oil and gas and reducing the oil circulation rate, thereby improving the reliability of the scroll compressor 100, and improving the reliability and efficiency of the air conditioning system using the scroll compressor 100.

[0034] In one embodiment, the stator 132 includes an iron core 1321, which is attached in the casing 11 and supported via the casing 11. In the axial direction of the crankshaft 16, if the distance between the lower end surface of the main frame 14 and the upper end surface of the iron core 1321 is H and the distance between the central axis 201 of the exhaust pipe 20 and the upper end surface of the iron core 1321 is h, then 0.17≦h / H≦0.62 holds. That is, if the distance between the lower end surface of the main frame 14 and the upper end surface of the iron core 1321 in the axial direction of the crankshaft 16 is H, and the distance between the central axis 201 of the exhaust pipe 20 and the upper end surface of the iron core 1321 in the axial direction of the crankshaft 16 is h, that is, in the height direction, the distance between the lower end surface of the main frame 14 and the upper end surface of the iron core 1321 is H, and the distance between the central axis 201 of the exhaust pipe 20 and the upper end surface of the iron core 1321 is h, the range of h / H is 0.17 to 0.62, and for example, the value of h / H can be 0.17, 0.20, 0.22, 0.25, 0.27, 0.3, 0.32, 0.35, 0.37, 0.40, 0.42, 0.45, 0.47, 0.50, 0.52, 0.55, 0.57, 0.60, 0.62, etc.

[0035] By setting the range of h / H to 0.17 to 0.62, more of the high-pressure oil-gas mixture discharged from the compression mechanism 12 can be sufficiently separated into oil and gas between the main frame 14 and the stator 132, and unseparated oil can be effectively prevented from directly entering the exhaust pipe 20.

[0036] In addition, by setting the range of W / L to 0.47 to 0.93 and the range of h / H to 0.17 to 0.62, most of the high pressure oil-air mixture discharged from the compression mechanism 12 is sufficiently separated into oil and gas between the main frame 14 and the stator 132, and another part of the high pressure oil-air mixture enters an axial passage such as the gap between the stator 132 and rotor 131 of the motor 13 to cool the motor 13 and sufficiently separates the oil and gas as it flows, and the separated gas is discharged through the exhaust pipe 20, so that more oil can be separated from the high pressure oil-air mixture discharged from the compression mechanism 12, reducing the oil content in the high pressure gas discharged through the exhaust pipe 20 and reducing the oil circulation rate.

[0037] In one embodiment, referring to FIG. 1, an edge cut 1322 is provided on the outer peripheral surface of the stator 132, allowing separated lubricant oil to flow to the bottom of the casing 11 through a passage between the edge cut 1322 and the casing 11.

[0038] In one embodiment, referring to FIG. 1, the casing 11 is provided with an intake pipe 19 that is connected to the compression mechanism 12 so as to suck in gas and facilitates compression by the compression mechanism 12.

[0039] In one embodiment, the compression mechanism 12 includes a fixed scroll 121 facing the main frame 14, and a movable scroll 122 that forms a compression chamber for compressing gas in cooperation with the fixed scroll 121. The movable scroll 122 is connected to the crankshaft 16, and is rotated via the crankshaft 16 so as to compress the gas in cooperation with the fixed scroll disk 121.

[0040] In one embodiment, the fixed scroll 121 is fitted with an exhaust valve 1211 such that the compressed high pressure oil-air mixture is discharged through the exhaust valve 1211 into the casing 11 .

[0041] In one embodiment, the exhaust valve 1211 is located at one end of the fixed scroll 121 away from the main frame 14, i.e., the exhaust valve 1211 is located at the top end of the fixed scroll 121, so that the high-pressure oil-gas mixture can be discharged toward the top of the casing 11, and the high-pressure oil-gas mixture can first collide with the top of the casing 11 and undergo oil-gas separation, thereby increasing the flow path of the high-pressure oil-gas mixture in the casing 11, and the high-pressure oil-gas mixture can undergo oil-gas separation during flow, thereby enhancing the effect of oil-gas separation.

[0042] In one embodiment, the scroll compressor 100 further includes an Oldham ring 18 connecting the movable scroll 122 and the main frame 14, i.e., the movable scroll 122 is supported on the main frame 14 via the Oldham ring 18, which reduces friction between the movable scroll 122 and the main frame 14, reduces wear of the movable scroll 122, and protects the movable scroll 122. In addition, the Oldham ring 18 can effectively reduce or prevent the rotation of the movable scroll 122 relative to the fixed scroll 121, thereby improving compression efficiency.

[0043] In one embodiment, the scroll compressor 100 further includes a subframe 17, which is mounted in the casing 11 and located on one side of the motor 13 away from the main frame 14, i.e., the subframe 17 is located below the motor 13, and the lower end of the crankshaft 16 passes through the subframe 17. The subframe 17 positions and supports the crankshaft 16, guides the rotation of the crankshaft 16, and reduces the rotational vibration of the crankshaft 16.

[0044] In one embodiment, a lubricating oil reservoir 111 is formed at the bottom of the casing 11, the lower end of the crankshaft 16 fits into the lubricating oil reservoir 111, and a pump oil passage 161 is provided in the crankshaft 16 to pump the lubricating oil.

[0045] In one embodiment, the exhaust pipe 20 has one end protruding from the casing 11 connected to an outer exhaust pipe 31, which makes it easy to connect to an external device and is convenient to use.

[0046] 1, 2 and 3, in one embodiment, the exhaust pipe 20 includes a straight pipe section 21 connected to the casing 11. The straight pipe section 21 is provided to facilitate connection to the casing 11 and to facilitate a welded connection to the casing 11.

[0047] In one embodiment, the entire exhaust pipe 20 is a straight pipe, which makes it easy to process and manufacture, and reduces costs.

[0048] In one embodiment, the straight pipe section 21 is provided with a positioning structure 23, which is located on the outer surface of the straight pipe section 21. When the straight pipe section 21 is inserted into the casing 11, the positioning structure 23 can function as a stopper positioning, that is, the positioning structure 23 can be engaged with the outer surface of the casing 11 to position the insertion depth of the exhaust pipe 20 into the casing 11, making it easy to assemble the exhaust pipe 20.

[0049] In one embodiment, the positioning structure 23 may be a ring base 231, which is provided on the straight pipe section 21, and when the exhaust pipe 20 is inserted into the casing 11, the ring base 231 abuts against the outer surface of the casing 11 to position the insertion depth of the exhaust pipe 20. By connecting the ring base 231 to the outer surface of the casing 11 by welding, the exhaust pipe 20 can be fixedly connected to the casing 11, which facilitates assembly and connection.

[0050] In one embodiment, a press-welded plane 112 is provided on the outer surface of the casing 11, and the end face 2311 of the ring base 231 close to the casing 11 is flat. During assembly, the end face of the ring base 231 close to the casing 11 abuts against the press-welded plane 112 of the casing 11, providing better adhesion to the press-welded plane 112 and facilitating welding to the casing 11.

[0051] Furthermore, if the outer surface of the casing 11 is an arcuate surface, the end face of the ring base 231 close to the casing 11 will have an arcuate surface which will conform to the outer surface of the casing, and during assembly, the end face of the ring base 231 close to the casing 11 will adhere better to the outer surface of the casing 11, making welding to the casing 11 easier.

[0052] In one embodiment, the positioning structure 23 and the straight pipe section 21 are integrally molded, which facilitates processing and manufacturing and ensures good joint strength between the positioning structure 23 and the straight pipe section 21. When the positioning structure 23 is a ring base 231, the ring base 231 and the straight pipe section 21 are integrally molded.

[0053] The positioning structure 23 may be welded to the straight pipe section 21. When the positioning structure 23 is a ring base 231, the ring base 231 and the straight pipe section 21 are manufactured separately, and then the ring base 231 is welded to the straight pipe section 21.

[0054] 1 and 4, in one embodiment, the positioning structure 23 may be a rib ring 232, which is provided in the straight pipe section 21, and the rib ring 232 determines the insertion depth of the exhaust pipe 20 into the casing 11. By using the rib ring 232 structure, it is possible to achieve a small size and low cost. Note that the positioning structure 23 may be a slight positioning protrusion provided on the outer circumferential surface of the straight pipe section 21, and the positioning protrusion may determine the insertion depth of the exhaust pipe 20 into the casing 11.

[0055] In one embodiment, when the positioning structure 23 is the rib ring 232, the rib ring 232 can be integrally formed with the straight pipe section 21, which facilitates processing and manufacturing. Of course, when the positioning structure 23 is the rib ring 232, the rib ring 232 and the straight pipe section 21 are manufactured separately, and then the rib ring 232 is welded to the straight pipe section 21.

[0056] In one embodiment, when the positioning structure 23 is a slight positioning protrusion, the slight positioning protrusion can be integrally formed with the straight pipe section 21, that is, when manufacturing the straight pipe section 21, the slight positioning protrusion can be formed on the outer circumferential surface of the straight pipe section 21. Of course, when the positioning structure 23 is a slight positioning protrusion, the positioning protrusion can be formed by directly welding to the outer circumferential surface of the straight pipe section 21.

[0057] Referring to Fig. 5, Fig. 5 is a schematic diagram showing a cross-sectional structure of a scroll compressor 100 provided in this embodiment. Fig. 6 is a schematic diagram showing a structure of an exhaust pipe 20 in this embodiment. Fig. 7 is a schematic diagram showing a cross-sectional structure of an exhaust pipe 20 in this embodiment. The configuration of this embodiment is modified based on Fig. 1, and the differences between the scroll compressor 100 of this embodiment and the scroll compressor 100 shown in Fig. 1 are as follows:

[0058] The section of the exhaust pipe 20 close to the crankshaft 16 is the tapered pipe section 22. That is, the exhaust pipe 20 has the tapered pipe section 22, and the tapered pipe section 22 is the section of the exhaust pipe 20 close to the crankshaft 16. The inner diameter of one end of the tapered pipe section 22 close to the crankshaft 16 is smaller than the inner diameter of the other end of the tapered pipe section 22. By providing the tapered pipe section 22, it is possible to prevent some of the gas from entering the exhaust pipe 20 when the amount of gas is the same, and a larger amount of the oil-gas mixture can be separated into the oil-gas mixture between the main balance weight 15 and the casing 11, thereby improving the effect of oil-gas separation.

[0059] In one embodiment, the cross-sectional area of ​​the tapered tube section 22 at one end adjacent the crankshaft 16 is S iThe cross-sectional area of ​​the end of the tapered tube section 22 far from the crankshaft 16 is S o Then, S i / S o The range is 0.50≦S i / S o ≦1.00. In other words, the area of ​​the opening of the tapered tube section 22 at one end close to the crankshaft 16 is S i The area of ​​the opening of the tapered tube section 22 at one end far from the crankshaft 16 is S o Then, S i / S o The range is 0.50 to 1.00. For example, S i / S o Values ​​are 0.52, 0.55, 0.57, 0.60, 0.62, 0.65, 0.67, 0.70, 0.72, 0.75, 0.77, 0.80, 0.82, 0.85, 0.87, 0.90, 0.92, 0.95, 0.97, 1.00, etc.

[0060] S i / S o The range is 0.50 to 1.00, which means that a good exhaust volume of the exhaust pipe 20 can be guaranteed, the high-pressure gas generated in the compression mechanism 12 can be well exhausted, the exhaust resistance can be reduced, and further, a larger amount of oil-gas mixture can be separated into oil-gas by the main balance weight 15 and the casing 11, thereby enhancing the effect of oil-gas separation.

[0061] 5, 6 and 7, in one embodiment, the exhaust pipe 20 further includes a straight pipe section 21, which is connected to the casing 11, and one end of the tapered pipe section 22 remote from the crankshaft 16 is connected to the straight pipe section 21, i.e., the exhaust pipe 20 includes the tapered pipe section 22 and the straight pipe section 21, the tapered pipe section 22 is located at one end of the straight pipe section 21 closer to the crankshaft 16, and the tapered pipe section 22 is connected to the straight pipe section 21. The straight pipe section 21 is provided to facilitate connection to the casing 11 and facilitate welding connection to the casing 11.

[0062] In one embodiment, the straight pipe section 21 is provided with a positioning structure 23, which is located on the outer surface of the straight pipe section 21. When the straight pipe section 21 is inserted into the casing 11, the positioning structure 23 can function as a stopper positioning, that is, the positioning structure 23 can be engaged with the outer surface of the casing 11 to position the insertion depth of the exhaust pipe 20 into the casing 11, making it easy to assemble the exhaust pipe 20.

[0063] In one embodiment, the positioning structure 23 may be a ring base 231, which is provided on the straight pipe section 21, and when the exhaust pipe 20 is inserted into the casing 11, the ring base 231 abuts against the outer surface of the casing 11 to position the insertion depth of the exhaust pipe 20. By connecting the ring base 231 to the outer surface of the casing 11 by welding, the exhaust pipe 20 can be fixedly connected to the casing 11, which facilitates assembly and connection.

[0064] In one embodiment, a press-welded plane 112 is provided on the outer surface of the casing 11, and the end face 2311 of the ring base 231 close to the casing 11 is flat. During assembly, the end face of the ring base 231 close to the casing 11 abuts against the press-welded plane 112 of the casing 11, providing better adhesion to the press-welded plane 112 and facilitating welding to the casing 11.

[0065] Furthermore, if the outer surface of the casing 11 is an arcuate surface, the end face of the ring base 231 close to the casing 11 will have an arcuate surface which will conform to the outer surface of the casing, and during assembly, the end face of the ring base 231 close to the casing 11 will adhere better to the outer surface of the casing 11, making welding to the casing 11 easier.

[0066] In one embodiment, the positioning structure 23 and the straight pipe section 21 are integrally molded, which facilitates processing and manufacturing and ensures good joint strength between the positioning structure 23 and the straight pipe section 21. When the positioning structure 23 is a ring base 231, the ring base 231 and the straight pipe section 21 are integrally molded.

[0067] The positioning structure 23 may be welded to the straight pipe section 21. When the positioning structure 23 is a ring base 231, the ring base 231 and the straight pipe section 21 are manufactured separately, and then the ring base 231 is welded to the straight pipe section 21.

[0068] 5 and 8, in one embodiment, the positioning structure 23 may be a rib ring 232 that is provided in the straight pipe section 21, and the rib ring 232 determines the insertion depth of the exhaust pipe 20 into the casing 11. Note that the positioning structure 23 may be a slight positioning protrusion provided on the outer circumferential surface of the straight pipe section 21, and the positioning protrusion may determine the insertion depth of the exhaust pipe 20 into the casing 11.

[0069] In one embodiment, when the positioning structure 23 is a rib ring 232, the rib ring 232 can be integrally molded with the straight pipe section 21. Of course, when the positioning structure 23 is a rib ring 232, the rib ring 232 and the straight pipe section 21 are manufactured separately, and then the rib ring 232 is welded to the straight pipe section 21.

[0070] In one embodiment, when the positioning structure 23 is a slight positioning protrusion 233, the slight positioning protrusion 233 can be integrally formed with the straight pipe section 21, that is, when manufacturing the straight pipe section 21, the slight positioning protrusion 233 can be formed on the outer circumferential surface of the straight pipe section 21. Of course, when the positioning structure 23 is a slight positioning protrusion 233, the positioning protrusion 233 may be formed by directly welding to the outer circumferential surface of the straight pipe section 21.

[0071] The oil-air mixture discharged from the compression mechanism 12 of the scroll compressor 100 proposed in the present application can be sufficiently separated into oil and air, so that the oil content in the exhaust gas of the scroll compressor 100 can be reduced, the oil circulation rate can be effectively reduced, and the reliability of the scroll compressor 100 can be guaranteed. The scroll compressor 100 can be applied to equipment such as air conditioners and air compressors.

[0072] An embodiment of the present application provides an air conditioning system including the scroll compressor 100 described in any one of the above embodiments. The air conditioning system of the embodiment of the present application uses the scroll compressor 100 of the above embodiments, and has the technical effects of the scroll compressor 100 described above, so a description thereof will be omitted here.

[0073] The above is merely an arbitrary embodiment of the present application, and does not limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of the claims of the present application. [Explanation of symbols]

[0074] 100-scroll compressor, 11-casing, 111-lubricating oil reservoir, 112-press welded flat surface, 12-compression mechanism, 121-fixed scroll, 1211-exhaust valve, 122-moving scroll, 13-motor, 131-rotor, 132-stator, 1321-iron core, 1322-edge cut portion, 14-main frame, 15-main balance weight, 16-crankshaft, 161-pump oil passage, 17-subframe, 18-Oldham ring, 19-intake pipe, 20-exhaust pipe, 201-center axis, 21-straight pipe section, 22-tapered pipe section, 23-positioning structure, 231-ring base, 232-rib ring, 233-positioning protrusion, 31-exhaust outer pipe

Claims

1. A scroll compressor including a casing, a compression mechanism, a main frame, a motor, a crankshaft, a main balance weight, and an exhaust pipe, wherein the main frame is located between the compression mechanism and the motor, the main balance weight is fitted to the crankshaft, and the main balance weight is located between the motor and the main frame, one end of the exhaust pipe penetrates the casing and extends toward an outer circumferential wall of the main balance weight, and one end of the exhaust pipe that enters the casing is located between the main frame and the motor, and a depth of the exhaust pipe into the casing in a radial direction of the casing is W and a distance between the outer circumferential wall of the main balance weight and an inner wall of the casing is L, where 0.47≦W / L≦0.93; a section of the exhaust pipe close to the crankshaft is a tapered pipe section, and an inner diameter of one end of the tapered pipe section close to the crankshaft is smaller than an inner diameter of the other end of the tapered pipe section.

2. 2. The scroll compressor according to claim 1, wherein the motor includes a rotor and a stator, the crankshaft passes through the rotor and is connected to the compression mechanism, the stator is attached to the casing, the stator includes an iron core attached in the casing, and wherein, in the axial direction of the crankshaft, a distance between a lower surface of the main frame that faces an upper end surface of the main balance weight in the axial direction of the crankshaft and an upper end surface of the iron core is H, and a distance between a central axis of the exhaust pipe and the upper end surface of the iron core is h, where H is a distance in the axial direction of the crankshaft between a lower surface of the main frame that faces an upper end surface of the main balance weight in the axial direction of the crankshaft and an upper end surface of the iron core, and h is a distance between a central axis of the exhaust pipe and the upper end surface of the iron core, and 0.17≦h / H≦0.

62.

3. The cross-sectional area of ​​one end of the tapered tube section close to the crankshaft is S ｉ and the cross-sectional area of ​​the end of the tapered tube section farther from the crankshaft is S ｏ Then, 0.50≦S ｉ / S ｏ 3. The scroll compressor according to claim 1, wherein the ratio of the stoichiometric ratio of the scroll compressor to the total stoichiometric ratio is less than 1.

00.

4. 3. The scroll compressor according to claim 1, wherein the exhaust pipe includes a straight section extending through the casing.

5. 5. The scroll compressor according to claim 4, wherein the straight pipe section is provided with a positioning structure for stopper positioning of an insertion depth of the exhaust pipe into the casing, the positioning structure being located on an outer circumferential surface of the straight pipe section.

6. 6. The scroll compressor according to claim 5, wherein the positioning structure is a rib ring provided in the straight pipe section, or the positioning structure includes a plurality of positioning protrusions provided on an outer circumferential surface of the straight pipe section.

7. 6. The scroll compressor according to claim 5, wherein the positioning structure is a ring base provided in the straight pipe section, and the ring base is connected to an outer surface of the casing by welding.

8. 8. The scroll compressor according to claim 7, wherein an end surface of said ring base close to said casing has an arcuate surface that fits to an outer surface of said casing.

9. 8. The scroll compressor according to claim 7, wherein an outer surface of the casing is provided with a press-welded flat surface, and one end surface of the ring base close to the casing presents a flat surface that matches the press-welded flat surface.

10. 6. The scroll compressor according to claim 5, wherein the positioning structure is integrally formed with the straight pipe section, or the positioning structure is welded to the straight pipe section.

11. An air conditioning system comprising the scroll compressor according to any one of claims 1 to 10.

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