Scroll compressor and refrigeration apparatus

Abstract

The utility model provides a kind of scroll compressor and refrigeration equipment, scroll compressor includes: shell, rack, crankshaft and oil guide piece.Rack is located in shell, and rack is provided with oil return passage;One end of crankshaft is inserted into rack;Oil guide piece is connected with shell, and oil guide piece is located in shell, and oil guide piece and shell form oil guide cavity between, and oil guide piece is equipped with mounting hole, and a part of rack is inserted to mounting hole, to make oil return passage and oil guide cavity communicate.The utility model avoids that lubricating oil is secondarily agitated by crankshaft in the process of falling back by the isolation of oil guide cavity.The insertion connection of rack and oil guide piece ensures that lubricating oil is accurately guided into oil guide cavity, prevents leakage and splashing at inlet.Lubricating oil can be more retained in compressor internal circulation, instead of being carried away by exhaust.The utility model guarantees that scroll compressor internal moving component has sufficient and stable lubricating oil film, improves the operation reliability and service life of scroll compressor.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a scroll compressor and refrigeration equipment. Background Technology

[0002] The scroll compressor is a core component of refrigeration equipment, and its reliability and lifespan largely depend on whether its internal moving parts receive sufficient and stable lubrication. Therefore, a highly efficient lubrication oil circulation system is required inside the scroll compressor. A typical lubrication circuit involves lubricating oil being pumped from an oil sump at the bottom of the casing by the crankshaft. After flowing through components such as the crankshaft and main frame for lubrication and cooling, the oil needs to be effectively collected and returned to the oil sump to maintain the oil level and achieve recycling.

[0003] In related technologies, open-type oil guide plates are usually used to recover lubricating oil. Although this structure can receive the oil returning from the frame, because it is completely exposed in the cavity of the scroll compressor, the falling oil flow will be directly subjected to the violent agitation of the high-speed rotating crankshaft, causing the oil to be atomized a second time. This not only causes a large amount of lubricating oil to be discharged with the exhaust, i.e., the oil discharge is too high, which reduces the amount of oil inside the compressor and increases the lubrication risk, but also reduces the heat exchange efficiency due to oil entering the system. Utility Model Content

[0004] The present invention aims to provide a scroll compressor and refrigeration equipment, which at least solves one of the technical problems in the prior art where the lubricating oil is agitated secondary by rotating parts such as the crankshaft due to the open oil guide plate, resulting in excessive oil discharge from the compressor.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, this utility model proposes a scroll compressor, comprising: a housing, a frame, a crankshaft, and an oil guide component. The frame is located inside the housing and has an oil return channel; one end of the crankshaft extends into the frame; the oil guide component is connected to the housing, located inside the housing, and forms an oil guide cavity between the oil guide component and the housing; the oil guide component has a mounting hole, and a portion of the frame is inserted into the mounting hole to connect the oil return channel and the oil guide cavity.

[0007] The scroll compressor proposed in this invention mainly includes a housing, a frame, a crankshaft, and an oil guide component. A scroll compressor is a type of positive displacement fluid machinery; its core working principle is to compress gas using two meshing scrolls with a phase difference.

[0008] In this invention, the housing constitutes the outer shell of the scroll compressor, providing support and protection for all internal operating components. The frame, as a fixed structure, is housed within the housing and is used to mount components such as bearings and the scroll plate. The frame is equipped with an oil return channel, which is the main channel of the lubrication system and is used to collect excess lubricating oil after lubrication. The crankshaft is the core of the scroll compressor's power transmission; one end rotates under the drive of the motor, while the other end extends into a bearing within the frame, transmitting the rotational motion to the compression mechanism.

[0009] The scroll compressor proposed in this invention has an oil guide component located inside the housing, forming an oil guide cavity between the oil guide component and the housing. The oil guide component has a mounting hole, into which the bottom or corresponding part of the frame is inserted during assembly. This insertion not only provides mechanical positioning but, more importantly, establishes a fluid channel, allowing the oil return channel outlet inside the frame to directly communicate with the lower oil guide cavity.

[0010] In related technologies, lubricating oil recovery relies on a simple open-type oil guide plate. After flowing out of the frame's oil return channel, the lubricating oil directly enters the spacious compressor main cavity in the form of drips or overflows. At this time, the high-speed rotating crankshaft and its counterweight violently agitate the oil-gas mixture in the cavity. The oil that should have fallen back is atomized again by this strong vortex, forming a large number of tiny oil droplets. Due to their light weight and large specific surface area, these oil droplets are easily carried by the compressed gas and eventually enter the refrigeration system through the exhaust port, resulting in a persistently high oil discharge from the compressor. This not only causes abnormal consumption of lubricating oil, threatening the long-term reliability of the compressor, but also contaminates the system and reduces heat exchange efficiency.

[0011] To address the above situation, the design concept of this invention is to transform open flow guidance into closed flow guidance. This invention constructs a physically isolated and protected oil guiding path. Specifically, this invention designs an oil guiding component, which, combined with the housing, no longer functions as a simple baffle in the traditional sense, but rather forms an oil guiding cavity. The primary function of the oil guiding cavity is physical isolation, separating the falling lubricating oil from the area of ​​strong airflow disturbance generated by crankshaft rotation, providing a calm environment for the oil to fall back. The frame part is inserted into the mounting hole of the oil guiding component. This insertion design forms a directional interface between the oil return channel outlet and the oil guiding cavity inlet, precisely guiding the oil flow into the oil guiding cavity, rather than allowing it to spill randomly.

[0012] During operation, as lubricating oil flows out from friction pairs such as the crankshaft and bearings and collects in the oil return channel of the frame, it flows towards the channel outlet under the influence of gravity and subsequent oil flow. Since the frame is connected to the mounting holes of the oil guide component, the oil is directly guided into the oil guide cavity formed by the oil guide component and the housing the instant it leaves the oil return channel. Inside the cavity, the oil flows smoothly downwards along the cavity wall under the influence of gravity. Because it is no longer in the strong vortex zone generated by the direct agitation of the crankshaft, the oil avoids violent splashing and atomization.

[0013] In summary, the scroll compressor proposed in this invention effectively reduces the amount of oil discharged from the compressor. The isolation of the oil guide chamber prevents the lubricating oil from being agitated again by the crankshaft during its descent, while the plug-in connection between the frame and the oil guide component ensures that the oil flow is precisely guided into this sealed channel, preventing leakage and splashing at the inlet. More lubricating oil can circulate within the compressor rather than be carried away by the exhaust. This invention guarantees a sufficient and stable lubricating oil film on the moving parts inside the scroll compressor, improving the operational reliability and service life of the scroll compressor.

[0014] In some technical solutions of this utility model, the frame and mounting holes are optionally sealed together.

[0015] Optionally, in some technical solutions of this utility model, the scroll compressor further includes: a guide ring, which is connected to the inner wall of the mounting hole, the guide ring is distributed circumferentially along the mounting hole, and the guide ring extends into the interior of the guide oil cavity.

[0016] In some technical solutions of this utility model, optionally, a portion of the frame extends into the oil guide cavity.

[0017] In some technical solutions of this utility model, optionally, the oil guide cavity includes a first cavity, which is connected to the oil return channel. The cross-sectional area of ​​the first cavity decreases from the side of the first cavity adjacent to the oil return channel to the side away from the oil return channel.

[0018] In some technical solutions of this utility model, optionally, the oil guide cavity further includes a second cavity, the side of the first cavity away from the oil return channel is connected to the second cavity, and the second cavity extends along the axial direction of the crankshaft.

[0019] In some technical solutions of this utility model, optionally, the cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the oil return channel.

[0020] In some technical solutions of this utility model, optionally, the cross-sectional area of ​​the oil return channel is S1, and the cross-sectional area of ​​the second cavity is S2, wherein S1 and S2 satisfy: S2≥1.3×S1.

[0021] In some technical solutions of this utility model, optionally, the maximum cross-sectional area of ​​the first cavity is S3, where S3≥5×S2.

[0022] Optionally, in some technical solutions of this utility model, the scroll compressor further includes: a motor, the motor is located inside the housing, one end of the oil guide protrudes from one axial side of the motor, and the other end of the oil guide protrudes from the other axial side of the motor.

[0023] Secondly, this utility model embodiment proposes a refrigeration device, including: a scroll compressor as described in any of the above technical solutions.

[0024] The refrigeration equipment proposed in the second aspect of this utility model, since it includes the scroll compressor as described in any of the above technical solutions, has all the beneficial effects of the scroll compressor in any of the above technical solutions.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 One of the structural schematic diagrams of the scroll compressor in this embodiment of the present invention is shown;

[0028] Figure 2 One of the structural schematic diagrams of a portion of the scroll compressor in an embodiment of this utility model is shown;

[0029] Figure 3 This is the second schematic diagram of a portion of the structure of the scroll compressor in an embodiment of the present invention;

[0030] Figure 4 The third schematic diagram shows a partial structural diagram of the scroll compressor in an embodiment of this utility model;

[0031] Figure 5 The fourth schematic diagram shows a partial structural diagram of the scroll compressor in an embodiment of this utility model;

[0032] Figure 6 The fifth schematic diagram shows a partial structural diagram of the scroll compressor in an embodiment of this utility model;

[0033] Figure 7 This is a second schematic diagram of the structure of the scroll compressor in an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the oil guide component in an embodiment of this utility model is shown.

[0035] Figure label:

[0036] 100 Scroll compressor, 110 Housing, 120 Frame, 122 Oil return channel, 130 Crankshaft, 140 Oil guide component, 142 Oil guide chamber, 144 First chamber, 146 Second chamber, 148 Mounting hole, 150 Sealing ring, 160 Flow guide ring, 170 Motor. Detailed Implementation

[0037] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0038] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following is combined with Figures 1 to 8 This invention describes the scroll compressor 100 and the refrigeration equipment proposed in this utility model.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in the embodiment of this utility model, a scroll compressor 100 is proposed, including: a housing 110, a frame 120, a crankshaft 130, and an oil guide 140. The frame 120 is located inside the housing 110 and is provided with an oil return channel 122; one end of the crankshaft 130 extends into the frame 120; the oil guide 140 is connected to the housing 110, is located inside the housing 110, and forms an oil guide cavity 142 between the oil guide 140 and the housing 110, and the oil guide 140 is provided with a mounting hole 148, a part of the frame 120 is inserted into the mounting hole 148 so that the oil return channel 122 and the oil guide cavity 142 are connected.

[0043] In this embodiment, the scroll compressor 100 proposed by this utility model mainly includes a housing 110, a frame 120, a crankshaft 130, and an oil guide 140. The scroll compressor 100 is a positive displacement fluid machine, and its core working principle is to compress gas using two meshing scroll disks with a phase difference.

[0044] Understandably, when the scroll compressor 100 is working, the moving disc rotates around the stationary disc in a planar motion driven by the crankshaft 130, forming a series of compression chambers that continuously decrease in volume from the outside to the inside, thereby realizing the intake, compression and discharge of gas.

[0045] In this invention, the housing 110 constitutes the outer shell of the scroll compressor 100, providing support and protection for all internal operating components. The frame 120, as a fixed structure, is housed within the housing 110 and is used to mount components such as bearings and the scroll plate. The frame 120 is provided with an oil return channel 122, which is the main channel of the lubrication system and is used to collect excess lubricating oil after lubrication. The crankshaft 130 is the core of the power transmission of the scroll compressor 100; one end rotates under the drive of a motor, and the other end extends into a bearing within the frame 120, transmitting rotational motion to the compression mechanism.

[0046] The scroll compressor 100 proposed in this utility model has an oil guide 140, which is located inside the housing 110, and an oil guide cavity 142 is formed between the oil guide 140 and the housing 110. The oil guide 140 has a mounting hole 148, into which the bottom or corresponding part of the frame 120 is inserted during assembly. This insertion not only provides mechanical positioning, but more importantly, it establishes a fluid channel, allowing the outlet of the oil return channel 122 inside the frame 120 to directly communicate with the lower oil guide cavity 142.

[0047] In related technologies, lubricating oil recovery relies on a simple open-type oil guide plate. After flowing out of the frame's oil return channel, the lubricating oil directly enters the spacious compressor main cavity in the form of drips or overflows. At this time, the high-speed rotating crankshaft and its counterweight violently agitate the oil-gas mixture in the cavity. The oil that should have fallen back is atomized again by this strong vortex, forming a large number of tiny oil droplets. Due to their light weight and large specific surface area, these oil droplets are easily carried by the compressed gas and eventually enter the refrigeration system through the exhaust port, resulting in a persistently high oil discharge from the compressor. This not only causes abnormal consumption of lubricating oil, threatening the long-term reliability of the compressor, but also contaminates the system and reduces heat exchange efficiency.

[0048] In response to the above situation, the design concept of this utility model is to change the open flow guide to a closed flow guide. This utility model constructs a physically isolated and protected oil guiding path. Specifically, this utility model designs an independent oil guiding component 140, which, combined with the housing 110, is no longer a simple baffle in the traditional sense, but forms an oil guiding cavity 142. The primary function of the oil guiding cavity 142 is physical isolation. The oil guiding cavity 142 isolates the falling lubricating oil from the area of ​​strong airflow disturbance generated by the rotation of the crankshaft 130, providing a calm falling environment for the oil. The frame 120 is partially inserted into the mounting hole 148 of the oil guiding component 140. This insertion design forms a directional interface between the outlet of the return oil channel 122 and the inlet of the oil guiding cavity 142, precisely guiding the oil flow into the oil guiding cavity 142, rather than letting it spill randomly.

[0049] During operation, after the lubricating oil flows out from the crankshaft 130, bearings, and other friction pairs and collects in the oil return channel 122 of the frame 120, the lubricating oil will flow towards the channel outlet under the impetus of gravity and subsequent oil flow. Since the frame 120 is partially inserted into the mounting hole 148 of the oil guide 140, the oil is directly guided into the oil guide cavity 142 formed by the oil guide 140 and the housing 110 the moment it leaves the oil return channel 122. Inside the cavity, the oil flows smoothly downward along the cavity wall under the action of gravity. Because it is away from the strong vortex zone generated by the direct agitation of the crankshaft 130, the oil avoids violent splashing and atomization.

[0050] In summary, the scroll compressor 100 proposed in this invention effectively reduces the amount of oil discharged from the compressor. The isolation of the oil guide chamber 142 prevents the lubricating oil from being agitated again by the crankshaft 130 during its descent. The plug-in connection between the frame 120 and the oil guide component 140 ensures that the oil flow is accurately guided into this sealed channel, preventing leakage and splashing at the inlet. Because more lubricating oil can circulate within the compressor rather than be carried away by the exhaust, this invention ensures that the moving parts inside the scroll compressor 100 have a sufficient and stable lubricating oil film, improving the operational reliability and service life of the scroll compressor 100.

[0051] Optionally, the inner wall of the housing 110 may be provided with specific recesses, protrusions or curved surfaces. These structures match the shape of the oil guide 140 and together define the boundary and volume of the oil guide cavity 142 to ensure smooth oil flow path and sealing.

[0052] Optionally, the housing 110 may also be provided with a mounting part for positioning and fixing the oil guide 140, such as a slot, welding boss or threaded hole, so as to ensure that the oil guide 140 can be stably and reliably combined with the housing 110 to form a long-term effective sealed oil guide space.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this utility model, the frame 120 and the mounting hole 148 are optionally sealed together.

[0054] In this embodiment, a sealed connection is used between the frame 120 and the mounting hole 148 on the oil guide 140. By implementing the sealed connection, it is ensured that the transfer process of lubricating oil from the return oil channel 122 to the oil guide chamber 142 is carried out entirely within the sealed channel, preventing oil leakage and splashing at critical interfaces.

[0055] Optionally, such as Figure 5 As shown, the sealing connection is achieved through a sealing ring 150. One or more annular sealing grooves are formed on the inner wall of the mounting hole 148 of the oil guide 140 or on the outer wall of the insertion section of the frame 120 to accommodate the sealing ring 150. When the insertion section of the frame 120 is inserted into the mounting hole 148, the sealing ring 150 is compressed between the sealing groove and the mating surface, resulting in elastic deformation and thus forming a sealing interface in the radial direction.

[0056] Alternatively, the sealing connection can also be achieved through an interference fit between the frame 120 and the mounting hole 148. In this design, the outer diameter of the insertion portion of the frame 120 is slightly larger than the inner diameter of the mounting hole 148. During assembly, a certain pressing force is required to press the frame 120 into the mounting hole 148. Effective sealing is achieved by relying on the large clamping force and contact stress generated between the mating surfaces of the parts due to the interference fit.

[0057] Alternatively, a sealed connection can be achieved by applying sealant.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, optionally, the scroll compressor 100 further includes: a guide ring 160, which is connected to the inner wall of the mounting hole 148, the guide ring 160 is distributed circumferentially along the mounting hole 148, and the guide ring 160 extends into the guide oil cavity 142.

[0059] In this embodiment, the scroll compressor 100 further includes a guide ring 160. The guide ring 160 is connected to the inner wall of the mounting hole 148. The guide ring 160 runs along the circumference of the mounting hole 148 (e.g., Figure 2 The guide rings (in the direction indicated by the middle arrow A) are continuously distributed and extend into the interior space of the lower oil guide cavity 142, thus forming a raised annular guide structure below the outlet of the return oil channel 122. This design ensures that the lubricating oil flowing out of the return oil channel 122 of the frame 120 is first confined to the annular space defined by the guide ring 160.

[0060] By setting the guide ring 160, after the lubricating oil flows out of the return oil channel 122, it will fall naturally under the action of gravity. At this time, the inner wall of the guide ring 160 provides a clear flow path for the oil, guiding it to flow smoothly along the ring wall to the main body of the guide oil cavity 142, rather than spreading disorderly. This effectively avoids the oil from accumulating and stagnating in the complex mounting hole 148 platform or interface gaps. If the oil accumulates here, it will not only increase the flow resistance and affect the return oil efficiency, but may also produce additional atomization due to the accumulated oil being blown by the passing airflow, resulting in an increase in the amount of oil discharged. After this utility model, the guide ring 160 ensures that the oil is quickly and centrally guided away from the critical interface area, ensuring that the initial section of the return oil path is always unobstructed, thereby improving the efficiency and reliability of the entire return oil process.

[0061] Optionally, the guide ring 160 and the oil guide component 140 are integrated into one piece. The guide component has high structural strength and good overall rigidity, while reducing the number of parts, simplifying the assembly process, improving product reliability and reducing manufacturing costs.

[0062] Optionally, the guide ring 160 and the oil guide element 140 can also be detachably connected. For example, the guide ring 160 can be a separate ring-shaped part, installed on the inner wall of the mounting hole 148 of the oil guide element 140 by means of threaded connection, snap connection, or screw fastening. The detachable design of the guide ring 160 makes maintenance more convenient; if the guide ring 160 is worn due to long-term scouring, it can be easily replaced individually.

[0063] Optionally, such as Figure 2 As shown, the guide ring 160 is a protrusion on the mounting hole 148. The cross-sectional shape of the guide ring 160 is not limited to a simple cylindrical shape, but can be further designed as a flared shape to smoothly receive and guide the oil flow and reduce inlet resistance.

[0064] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments of the present invention, optionally, a portion of the frame 120 extends into the oil guide cavity 142.

[0065] In this embodiment, the portion of the frame 120 with the oil return channel 122 extends downwards during assembly, so that its end extends beyond the plane of the mounting hole 148 and directly into the internal space of the oil guide cavity 142, which is jointly formed by the oil guide member 140 and the housing 110. Because a portion of the frame 120 extends into the oil guide cavity 142, the outlet of the oil return channel 122 of the frame 120 does not terminate at the inlet interface of the oil guide cavity 142, but is located inside the oil guide cavity 142.

[0066] This invention reduces the risk of oil overflow at critical interfaces by directly positioning the outlet of the oil return channel 122 inside the oil guiding cavity 142. Because the oil flow path from the channel outlet to the oil guiding cavity 142 is minimized and the entire path is enclosed in a sealed cavity, splashing, diffusion, and lateral overflow of oil that may occur due to gravitational acceleration, airflow disturbance, or oil flow inertia are completely avoided.

[0067] Optionally, the end of the frame 120 extending into the oil guide cavity 142 may extend to the middle region of the oil guide cavity 142, so that the oil return port is away from the top opening of the cavity, and potential airflow interference is better avoided. The specific length can be optimized according to the depth of the oil guide cavity 142 and the desired oil return speed.

[0068] like Figure 1 , Figure 5 and Figure 6As shown, in some embodiments of the present invention, optionally, the oil guide cavity 142 includes a first cavity 144, which is connected to the oil return channel 122. The cross-sectional area of ​​the first cavity 144 decreases from the side of the first cavity 144 adjacent to the oil return channel 122 to the side away from the oil return channel 122.

[0069] In this embodiment, the oil guide cavity 142 includes a first cavity 144. The first cavity 144 communicates with the oil return channel 122 of the frame 120, starting from one side adjacent to the inlet of the oil return channel 122 and extending to the other side away from the oil return channel 122, the first cavity 144 is radially (e.g., along the crankshaft 130) Figure 7 The cross-sectional area (in the direction indicated by arrow B) is reduced. This design makes the cavity widest at the entrance and then gradually narrows.

[0070] This invention constructs a flow channel with a gradually narrowing cross-section. Because the first cavity 144 has a larger initial cross-sectional area on the side adjacent to the inlet of the return oil channel 122, it provides a spacious buffer and receiving area for the outflowing oil, ensuring that the oil can smoothly and unobstructedly enter the guide cavity 142, effectively avoiding the risk of oil accumulation and splashing due to a narrow inlet. As the cavity cross-section gradually narrows away from the inlet, its guiding effect on the oil flow becomes increasingly significant, guiding and accelerating the stable flow of oil towards the preset outlet direction. This wide-inlet, narrow-outlet structure of this invention not only ensures the smoothness of the initial oil injection but also improves the concentration and fluidity of subsequent guidance through the gradually narrowing structure.

[0071] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of the present invention, optionally, the oil guide cavity 142 further includes a second cavity 146, the side of the first cavity 144 away from the oil return channel 122 is connected to the second cavity 146, and the second cavity 146 extends along the axial direction of the crankshaft 130.

[0072] In this embodiment, the oil guide cavity 142 further includes a second cavity 146. Specifically, the first cavity 144 is located on the side away from the inlet of the return oil channel 122 and communicates with the second cavity 146. The second cavity 146 does not extend horizontally, but mainly along the axial direction of the crankshaft 130 (e.g., Figure 7 Extending in the direction indicated by the middle arrow C, the oil guide 140 is an overall long strip structure.

[0073] By incorporating an axially extending second cavity 146, this invention effectively avoids the complex internal structure of the compressor by arranging the oil guide cavity 142. The internal space of the scroll compressor 100's housing 110 is compact, with components such as the crankshaft 130, motor rotor, and balance weight occupying specific positions; traditionally shaped cavities may be difficult to arrange. Designing the oil guide cavity 142 to include the axially extending second cavity 146 provides greater layout flexibility, allowing it to avoid internal moving parts and fixed structures such as the crankshaft 130 and balance weight.

[0074] This invention ensures that the oil guide cavity 142 can obtain the necessary volume and reasonable flow channel length without interfering with any key components, thereby successfully constructing a complete and efficient closed oil return path within a limited space, and ultimately reliably achieving the goal of reducing oil discharge.

[0075] It should be noted that the cross-sections of the first cavity 144 and the second cavity 146 are perpendicular to the direction of oil flow in the oil guide cavity 142.

[0076] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of this utility model, optionally, the cross-sectional area of ​​the second cavity 146 is larger than the cross-sectional area of ​​the oil return channel 122.

[0077] In this embodiment, when viewed radially perpendicular to the crankshaft 130 axis, the cross-sectional area of ​​the second cavity 146 is larger than the cross-sectional area of ​​the oil return channel 122 on the frame 120. By limiting the cross-sectional area relationship, this invention can, on the one hand, reduce the impact of oil on the bottom of the cavity and suppress splashing; on the other hand, the spacious second cavity 146 provides a buffer and expansion space for the oil, which can instantly accommodate the instantaneous large flow of oil that may occur in the oil return channel 122, avoiding the stagnation and accumulation of oil at the outlet of the oil return channel 122 due to insufficient flow capacity, thereby preventing the increase of the oil return back pressure and ensuring the smoothness and stability of the entire lubrication return oil circulation.

[0078] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments of this utility model, optionally, the cross-sectional area of ​​the oil return channel 122 is S1, and the cross-sectional area of ​​the second cavity 146 is S2, where S1 and S2 satisfy: S2≥1.3×S1.

[0079] In this embodiment, the dimensional relationships of the oil guiding cavity 142 are precisely defined. The cross-sectional area of ​​the oil return channel 122 inside the frame 120 is defined as S1, and the radial cross-sectional area of ​​the second cavity 146 in the oil guiding cavity 142 is defined as S2. S1 and S2 satisfy the ratio S2 ≥ 1.3 × S1. By setting a cross-sectional area ratio of not less than 1.3, this invention ensures that when oil enters the second cavity 146 from the narrow oil return channel 122, the flow area is instantly and sufficiently expanded. According to fluid mechanics principles, this significantly reduces the oil flow velocity, converting kinetic energy into pressure energy, thereby greatly reducing the impact on the cavity and the resulting splashing and atomization. More importantly, the sufficiently large S2 provides ample buffer space for potentially large instantaneous flow rates of oil, effectively avoiding the risk of oil stagnation, increased back pressure, or even blockage at the outlet of the oil return channel 122 due to insufficient flow capacity, fundamentally ensuring the long-term smoothness and stability of the oil return path.

[0080] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments of this utility model, optionally, the maximum cross-sectional area of ​​the first cavity 144 is S3, where S3 ≥ 5 × S2.

[0081] In this embodiment, the inlet structure of the oil guiding cavity 142 is designed such that, along the radial direction of the crankshaft 130, the maximum radial cross-sectional area of ​​the first cavity 144 is S3, which satisfies the ratio S3 ≥ 5 × S2 with the cross-sectional area S2 of the second cavity 146. This invention achieves the crucial functions of oil reception and primary diffusion by setting a large ratio of S3 several times that of S2. The significant difference in cross-sectional area makes the inlet area of ​​the first cavity 144 a highly efficient expansion buffer chamber. After flowing out from the return oil channel 122, the oil first enters the spacious S3 region, where its flow velocity drops sharply, and a large amount of kinetic energy is dissipated. This ensures that the oil completes the primary transition from high-speed jet to smooth, slow flow before entering the relatively narrow S2 channel, greatly reducing the impact energy of the oil flow. It effectively suppresses splashing and atomization of the oil in the most critical inlet area of ​​the oil guiding cavity 142 caused by severe impact and turbulence, laying a solid foundation for subsequent low-disturbance flow and significantly improving the efficiency of the entire oil guiding system.

[0082] Furthermore, by designing the radial cross-sectional area S2 of the second cavity 146 to be smaller than that of the first cavity 144, this application enables the second cavity 146 to form a more slender flow channel structure in the axial direction, giving the oil guide cavity 142 greater layout flexibility.

[0083] In addition, such as Figure 8As shown, the oil guide 140 can be lengthened, specifically by extending the first cavity 144 along the axial direction of the crankshaft 130. This lengthening design further extends the buffer path of the lubricating oil before it enters the second cavity 146. Within the extended first cavity 144, the oil has more time and space to slow down and stabilize its flow, thus dissipating its kinetic energy more thoroughly. This further suppresses impact and splashing, improving noise reduction and reducing oil discharge.

[0084] In some embodiments of the present invention, optionally, the scroll compressor 100 further includes: a motor 170, the motor 170 being located inside the housing 110, one end of the oil guide 140 protruding from one axial side of the motor 170, and the other end of the oil guide 140 protruding from the other axial side of the motor 170.

[0085] The length of the oil guide 140 is greater than the length of the motor 170, so that the two ends of the oil guide 140 protrude from the axial ends of the motor 170 respectively. When the oil is discharged from the oil guide cavity 142, it will not contact the motor 170, thus achieving the function of smooth oil return.

[0086] In an embodiment of this utility model, a refrigeration device is provided, including a scroll compressor 100 as described in any of the above embodiments.

[0087] In this embodiment, the refrigeration device proposed by this utility model includes the scroll compressor 100 as in any of the above embodiments, and therefore has all the beneficial effects of the scroll compressor 100 in any of the above embodiments.

[0088] Specifically, the refrigeration equipment proposed in this invention employs a scroll compressor 100 with an innovative oil-guiding structure. The effective operation of the oil-guiding chamber 142 ensures stable circulation of lubricating oil within the compressor, significantly reducing the amount of lubricating oil circulating in the system along with the refrigerant. This not only directly improves the service life and reliability of the compressor but also ensures that the heat exchange efficiency of the entire refrigeration system is maintained at a high design level. Consequently, this refrigeration equipment possesses significant advantages in terms of energy efficiency ratio, long-term operational stability, and maintenance costs.

[0089] Alternatively, the refrigeration equipment can be an air conditioner, such as a split-type air conditioner or a window air conditioner. The low oil discharge characteristic of the scroll compressor 100 helps to keep the system clean and maintain efficient cooling / heating.

[0090] Alternatively, the refrigeration equipment can also be a water chiller or a refrigeration and freezing unit, such as a commercial display case or cold storage.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate 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 the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A scroll compressor, characterized in that, include: case; A frame is located inside the housing, and the frame is provided with an oil return channel; A crankshaft, one end of which extends into the frame; An oil guide is connected to the housing. The oil guide is located inside the housing, and an oil guide cavity is formed between the oil guide and the housing. The oil guide has a mounting hole. A portion of the frame is inserted into the mounting hole to make the oil return channel and the oil guide cavity communicate.

2. The scroll compressor according to claim 1, characterized in that, The frame and the mounting hole are sealed together.

3. The scroll compressor according to claim 1, characterized in that, The scroll compressor includes: A guide ring is connected to the inner wall of the mounting hole. The guide ring is distributed circumferentially along the mounting hole and extends into the interior of the oil guide cavity.

4. The scroll compressor according to claim 1, characterized in that, A portion of the frame extends into the oil guide cavity.

5. The scroll compressor according to any one of claims 1 to 4, characterized in that, The oil guiding cavity includes a first cavity that is connected to the oil return channel. The cross-sectional area of ​​the first cavity decreases from the side of the first cavity adjacent to the oil return channel to the side away from the oil return channel.

6. The scroll compressor according to claim 5, characterized in that, The oil guide cavity further includes a second cavity, the side of the first cavity away from the oil return channel is connected to the second cavity, and the second cavity extends along the axial direction of the crankshaft.

7. The scroll compressor according to claim 6, characterized in that, The cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the oil return channel.

8. The scroll compressor according to claim 6, characterized in that, The cross-sectional area of ​​the oil return channel is S1, and the cross-sectional area of ​​the second cavity is S2. S1 and S2 satisfy: S2≥1.3×S1.

9. The scroll compressor according to claim 8, characterized in that, The maximum cross-sectional area of ​​the first cavity is S3, where S3 ≥ 5 × S2.

10. The scroll compressor according to any one of claims 1 to 4, characterized in that, The scroll compressor also includes: The motor is located inside the housing. One end of the oil guide protrudes from one axial side of the motor, and the other end of the oil guide protrudes from the other axial side of the motor.

11. A refrigeration device, characterized in that, include: The scroll compressor as described in any one of claims 1 to 10.

Images