Mainframe structure, compressor and refrigeration equipment

Abstract

The embodiment of the utility model provides a kind of main frame structure, compressor and refrigeration equipment, wherein, main frame structure includes: rack body, outer peripheral portion and the inner cavity of being arranged in the radial inner side of outer peripheral portion are equipped in rack body;Oil discharge passage, one end of oil discharge passage is connected with inner cavity, and the other end of oil discharge passage is equipped with oil outlet, and oil outlet is arranged in outer peripheral portion;Valve group assembly is detachably connected with rack body, and valve group assembly includes valve piece, and valve piece includes the head and tail that are connected, tail is connected with rack body, head is used to open and close oil outlet, and in the case where head and oil outlet are pasted, head covers oil outlet.The utility model discloses technical scheme, significantly reduce the oil discharge rate under high frequency, while not affecting the continuous lubrication and oil return closed loop to eccentric crankshaft and dynamic scroll hub portion.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a main frame structure, a compressor, and a refrigeration device. Background Technology

[0002] Currently, in the operation of refrigeration equipment, the refrigerant is usually compressed by a compressor and heat exchanged. In related technologies, when the compressor operates at a high speed, the amount of oil that needs to be discharged from the chamber increases, causing the oil flowing out of the main frame to overflow and not be able to flow back to the oil sump completely. This results in a large amount of oil being entrained by gas, leading to an increase in the oil discharge rate of the compressor at high frequencies. Utility Model Content

[0003] The present invention aims to at least solve the technical problem of increased oil discharge rate when the compressor is running at high speed in the prior art or related technologies.

[0004] In view of this, an embodiment of the present invention provides a main frame structure.

[0005] Another embodiment of this utility model provides a compressor.

[0006] Another embodiment of this utility model provides a refrigeration device.

[0007] To achieve the above objectives, embodiments of this utility model provide a main frame structure, comprising: a frame body, the frame body having an outer peripheral portion and an inner cavity located radially inward of the outer peripheral portion; an oil drain channel, one end of which is connected to the inner cavity, and the other end of which has an oil outlet located on the outer peripheral portion; and a valve assembly detachably connected to the frame body, the valve assembly including a valve plate, the valve plate including a connected head and a tail, the tail being connected to the frame body, the head being used to open and close the oil outlet, and when the head is in contact with the oil outlet, the head covers the oil outlet.

[0008] According to the main frame structure proposed in this utility model, under the high back pressure and high speed conditions of the scroll compressor, the main frame structure achieves passive flow restriction and stable discharge of oil quantity and flow rate through the position arrangement of the oil discharge channel and oil outlet, as well as the adaptive opening and closing of the valve plates in the valve assembly. At low speeds, it ensures smooth discharge of oil from the inner cavity; at high speeds, it suppresses instantaneous large flow and high-speed jets, preventing oil from overflowing at the external oil circuit and being entrained by gas, significantly reducing the oil discharge rate at high frequencies, while not affecting the continuous lubrication and oil return closed loop of the eccentric crankshaft and the moving scroll hub.

[0009] In some technical solutions, the main frame structure may optionally include: a mounting groove located on the outer periphery, with the other end of the oil drain channel extending to the bottom of the mounting groove; wherein the valve assembly is located within the mounting groove.

[0010] In this design, the mounting groove is located on the outer periphery of the frame body, and the other end of the oil drain channel extends to the bottom of the mounting groove. The mounting groove is located on the outer periphery, and the bottom of the groove is the outlet of the oil drain channel, providing a fixed space and positioning surface for the valve assembly. This ensures stable positioning of the valve plate, accurate operation, and prevents displacement and damage. The valve assembly is located inside the mounting groove, with the tail of the valve plate connected to the frame body and the head covering the oil outlet. The valve assembly is adjacent to the outlet of the oil drain channel, with the head fitting against the oil outlet. The valve plate achieves opening and closing control. The mounting groove limits the valve plate's opening stroke, allowing for smooth oil draining at low speeds and throttling and flow restriction at high speeds, reducing overflow and oil discharge rates. The first end of the oil drain channel is connected to the inner cavity, and the other end extends to the bottom of the mounting groove. The inner cavity is radially inward, and the oil drain channel extends radially outward to the outer periphery. Oil flows from the inner cavity into the oil drain channel and is smoothly discharged. The oil flow path is stable and continuous, reducing local eddies and bubble entrainment.

[0011] In some technical solutions, the tail section can optionally be detachably connected to the bottom of the mounting groove.

[0012] In this technical solution, the tail of the valve plate is detachably connected, specifically by bolts, clips, pins, etc., so as to be firmly connected to the bottom of the mounting groove. However, the connection method allows for disassembly, which facilitates the disassembly and replacement of the valve assembly.

[0013] In some technical solutions, the valve assembly may optionally include a limiter, which is located on the side of the valve plate away from the oil outlet; wherein the projection of the limiter on the groove wall of the mounting groove is located inside the groove wall.

[0014] The limiter is installed on the inner side of the mounting groove wall, located at the tail of the valve plate away from the oil outlet. It limits the maximum opening angle of the valve plate, prevents the valve plate from opening excessively, protects structural safety, ensures sealing performance, and enables the valve assembly to achieve precise flow regulation and check flow function under both high and low speed conditions, effectively reducing the oil discharge rate during high-frequency operation.

[0015] In some technical solutions, optionally, the angle between the axis of the oil outlet and the axis of the inner cavity is in the range of 30° to 150°.

[0016] In this technical solution, the included angle range between the oil outlet axis and the inner cavity axis is defined as 30°~150°. Through reasonable flow direction deflection and spatial arrangement, stable guidance of oil flow, effective installation and sealing control of valve assembly are achieved, which significantly improves the lubricating oil discharge control effect of the scroll compressor and its performance during high-frequency operation.

[0017] In some technical solutions, the main frame structure may optionally include: an oil guide groove, located on the outer periphery and positioned below the outer periphery in the height direction; and an oil guide member, the first end of which is positioned below the oil guide groove in the height direction.

[0018] In this technical solution, the oil guide groove is located below the outer periphery of the compressor frame, serving as the first collection and guiding area for lubricating oil after it flows out from the oil drain channel and valve assembly, forming the starting point for the oil to return to the oil sump at the bottom of the compressor. The first end of the oil guide component is located below the oil guide groove, receiving the oil flowing out and guiding it smoothly back down, forming a complete oil return channel system. This design ensures the orderly flow of lubricating oil, avoiding splashing and gas-liquid mixing during the return process, reducing the system's oil discharge rate and oil mist contamination. The rational layout of the oil guide groove and oil guide component, combined with the throttling effect of the valve assembly, jointly achieves effective discharge and return of lubricating oil under high-frequency, high-speed operating conditions, improving the compressor's operational stability and lifespan.

[0019] In some technical solutions, optionally, the oil guide extends along the height direction, and the distance between the second end of the oil guide and the axis of the inner cavity is greater than the distance between the first end of the oil guide and the axis of the inner cavity.

[0020] In this technical solution, the oil guide component extends downward from a higher position as an extension of the oil guide groove, while simultaneously offsetting radially outward to form an inclined return channel for the oil. Together with the oil guide groove and valve assembly, it ensures that the lubricating oil flows smoothly from the inner cavity of the main frame through the oil discharge channel, mounting groove, oil guide groove, and oil guide component, and finally falls evenly back to the oil sump at the bottom of the compressor. The radial outward expansion of the oil reduces local velocity peaks and eddies in the return path, reducing the risk of oil splashing and gas-liquid mixing, and helps to reduce the oil discharge rate under high-speed and high-frequency operating conditions. The inclined layout of the oil guide component also helps to make reasonable use of the internal space of the frame, avoid interference with key components such as motors and seals, and improve the overall structural compactness and reliability.

[0021] In some technical solutions, the valve assembly may optionally not protrude from the outer wall surface of the outer periphery.

[0022] In this design, the valve assembly, serving as the oil discharge flow control unit, is installed within a mounting slot on the outer periphery of the frame body. Its overall dimensions and opening stroke are confined within the outer wall surface of the outer periphery, ensuring that the valve assembly will not protrude and interfere with the installation and fit of the housing or oil guide plate, thus avoiding mechanical interference and friction damage. The embedded design facilitates a tight fit and reliable seal between the valve head and the oil outlet, reducing oil leakage and discharge rate. Simultaneously, the valve assembly is encased by the frame body, enhancing its mechanical strength and impact resistance, extending its service life. During maintenance, the valve assembly can be directly disassembled through the mounting slot without disassembling the frame or housing, improving maintenance convenience.

[0023] Another embodiment of this utility model provides a compressor, including the above-described main frame structure.

[0024] Through the main frame structure, the compressor can achieve efficient return and discharge control of lubricating oil, especially under high-speed and high-frequency operating conditions, which significantly reduces oil discharge rate and oil-gas mixing, thereby improving the operating stability and lifespan of the compressor.

[0025] Since the compressor in this embodiment includes any of the above-described main frame structures, it has the beneficial effects of any of the above-described main frame structures, which will not be repeated here.

[0026] Another embodiment of this utility model provides a refrigeration device, including the compressor described above.

[0027] By employing the compressor described above, efficient and stable compressor operation performance is achieved. The refrigeration equipment has a compact structure, is easy to maintain, is suitable for various refrigeration systems, and improves the overall system performance.

[0028] Among them, refrigeration equipment includes, but is not limited to, refrigerators, freezers, air conditioners and other equipment with refrigeration functions.

[0029] Since the refrigeration equipment in this embodiment includes any of the above-mentioned compressors, it has the beneficial effects of any of the above-mentioned compressors, which will not be described in detail here.

[0030] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0031] Figure 1 A schematic diagram of a mainframe structure according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram of a mainframe structure according to an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of the structure of a compressor according to an embodiment of the present invention is shown;

[0034] Figure 4 A schematic diagram of the structure of a refrigeration device according to an embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram of the structure of a valve plate according to an embodiment of the present invention is shown.

[0036] Wherein, 1: Main frame structure; 11: Frame body; 111: Outer periphery; 112: Inner cavity; 12: Oil drain channel; 121: Oil outlet; 13: Valve assembly; 131: Valve plate; 1311: Head; 1312: Tail; 132: Limiter; 14: Mounting groove; 151: Oil guide groove; 152: Oil guide component; 16: Bolt;

[0037] 2: Compressor;

[0038] 3: Refrigeration equipment. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0041] In related technologies, in high back pressure scroll compressors, lubricating oil, after reaching the eccentric crankshaft and the hub of the moving scroll through the oil supply channel in the drive shaft for lubrication, falls into the chamber formed by the recess of the main frame. The oil in the chamber is discharged from the oil discharge channel in the main frame through the oil outlet to the outside of the main frame. The lubricating oil flows sequentially through the oil guide of the casing and the stator tangent of the motor, and falls back into the oil sump at the bottom of the scroll compressor.

[0042] When the compressor runs at high speed, the amount of oil that needs to be discharged from the chamber increases. At this time, the oil flowing from the oil discharge channel of the main frame will overflow from the oil guide plate of the casing, and the return oil path cannot be effectively constrained. A large amount of oil is entrained by the gas, resulting in an increased oil discharge rate of the compressor at high frequencies.

[0043] The following reference Figures 1 to 5 Some embodiments according to the present invention are described.

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a main frame structure 1. Under the high back pressure and high speed conditions of the scroll compressor 2, the main frame structure 1 achieves passive flow restriction and stable discharge of oil quantity and flow rate through the positional arrangement of the oil discharge channel 12 and the oil outlet 121, and the adaptive opening and closing of the valve plate 131 in the valve assembly 13. At low speeds, it ensures smooth discharge of oil from the inner cavity 112; at high speeds, it suppresses instantaneous large flow and high-speed jet, preventing oil from overflowing at the external oil circuit and being entrained by gas, significantly reducing the oil discharge rate at high frequencies, while not affecting the continuous lubrication and oil return closed loop of the eccentric crankshaft and the moving scroll hub.

[0045] It can be understood that the oil in the inner cavity 112 enters the channel through the first end of the oil discharge channel 12, and is discharged to the external oil passage where the outer peripheral part 111 is located through the oil outlet 121 at the other end; such as Figure 1 and Figure 5As shown, the head 1311 of the valve plate 131 opens adaptively under pressure and flow rate, and when flow throttling or backflow prevention is required, it comes into contact with the oil outlet 121. The head 1311 covers the oil outlet 121 to form an effective sealing surface, suppressing turbulence, entrainment, and secondary injection. Overall, this improves the stability of the system during high-frequency operation, reduces noise, lowers oil separation load and energy consumption, and enhances reliability and maintainability.

[0046] Specifically, the main frame structure 1 includes a frame body 11, an oil drain channel 12, and a valve assembly 13. The frame body 11 serves as the load-bearing and channel carrier, providing a continuous rigid shell and mounting reference surface. Internally, it integrates an outer periphery 111 and an inner cavity 112 located radially inward of the outer periphery 111, ensuring the mechanical boundary stability of the oil drain channel 12 and the valve assembly 13. The radial inward-outward relationship between the outer periphery 111 and the inner cavity 112 creates a pressure and level difference, facilitating oil discharge from the inner cavity 112 to the outer periphery 111. The frame body 11 provides a fixing surface and a sealing surface for the valve assembly 13, ensuring a stable connection of the tail 1312 of the valve plate 131 and a good seal between the head 1311 and the valve plate. It can be understood that the frame body 11 improves the stiffness and dimensional accuracy of the flow channel, reduces gap leakage and additional eddies caused by shell deformation, stabilizes the pressure differential environment, and facilitates the predictable opening and closing of the valve plate 131.

[0047] The outer peripheral portion 111 serves as the outer periphery of the frame body 11, carrying the oil outlet 121 and being directly adjacent to external oil passages (such as the internal guide area of ​​the housing). The oil outlet 121, located on the outer peripheral portion 111, allows the discharged oil to directly transition to the return oil path outside the housing, shortening the transition distance from the main frame to the external oil passage. This prevents oil from flowing back radially inward, reduces the bending angle and abrupt expansion of the oil at the oil outlet 121, lowers the impact of the jet on the external free liquid surface, and reduces the probability of overflow and the risk of being entrained by gas.

[0048] The inner cavity 112, located radially inside the outer peripheral portion 111, forms a temporary storage and buffer space for oil, collecting lubricating oil falling from the drive shaft oil supply channel and the eccentric crankshaft and moving scroll hub. The inner cavity 112, located radially inside the outer peripheral portion 111, naturally creates a radial pressure difference and gravitational potential difference between the inner cavity 112 and the outer peripheral portion 111. This provides stable inlet boundary conditions for the first end of the oil discharge channel 12, balancing flow pulsations and oil surface fluctuations, reducing gas-liquid mixing, and increasing the purity of the oil phase entering the oil discharge channel 12, which helps reduce oil discharge rate and noise.

[0049] The oil discharge channel 12, as a closed flow channel connecting the inner cavity 112 and the oil outlet 121, determines the local pressure drop, flow area and flow velocity distribution. The first end of the oil discharge channel 12 is connected to the inner cavity 112, and the other end is provided with the oil outlet 121, realizing a single-path discharge from the inner cavity 112 to the outer periphery 111. This connection ensures that the oil in the inner cavity 112 flows to the outside through a fixed channel rather than a dissipation path.

[0050] The first end is located on the inner cavity 112 side and the other end is located on the outer periphery 111 side. The radially oriented channel reduces lateral backflow and backflow, which is conducive to forming a stable directional oil discharge. It provides low-resistance flow at low speeds to ensure that the oil falls back quickly. At high speeds, it works with the valve plate 131 to generate a controllable pressure drop, limit the instantaneous peak flow rate, and suppress free jetting and overflow at the oil outlet 121.

[0051] The first end of the oil drain channel 12 is connected to the inner cavity 112, ensuring that the oil in the inner cavity 112 can enter the oil drain channel 12 without delay, forming a clear inlet boundary and inlet pressure, reducing the risk of separation and reattachment at the inlet, reducing the probability of gas entrainment into the channel, and improving the stability and repeatability of the downstream valve plate 131 operation.

[0052] The other end of the oil discharge channel 12 is provided with an oil outlet 121, which is located on the outer periphery 111. By arranging the channel outlet on the outer periphery 111, the oil is discharged radially outward and directly enters the external oil return path, avoiding the formation of a secondary return loop inside the frame body 11, shortening the oil discharge path, reducing the back disturbance of the channel outlet to the inner cavity 112, reducing the coupling to the liquid surface fluctuation of the inner cavity 112 at high flow rates, and reducing the source of gas entrainment.

[0053] Valve assembly 13 is an assembly including valve plate 131, used to dynamically open and close the oil outlet 121 and prevent backflow, forming a passive adaptive flow control unit. Valve assembly 13 is detachably connected to the frame body 11, which facilitates assembly, maintenance and parameter matching (e.g., replacing valve plate 131 with different stiffness), reduces maintenance costs and improves adaptability, making the main frame structure 1 maintainable and adjustable, and facilitating the optimization of opening and closing characteristics and oil discharge control effect under different models and operating conditions.

[0054] The valve plate 131, acting as an elastic element for opening and closing control, comprises a connected head 1311 and a tail 1312, forming a typical cantilever-type force and deformation structure. It achieves adaptive opening under pressure difference and flow velocity, and quickly closes or adheres when check valve or flow restriction is required, providing both sealing and throttling functions, reducing high-frequency oil discharge and overflow.

[0055] The valve plate 131 includes a connected head 1311 and a tail 1312. The connection ensures that the load and displacement are transmitted from the tail 1312 to the head 1311, forming a stable elastic hinge characteristic. The head 1311 undertakes the sealing and throttling functions, while the tail 1312 undertakes the fixing and pre-tightening functions, which improves the linearity and repeatability of the valve plate 131 response and reduces the vibration and knocking noise during the opening and closing process.

[0056] The tail 1312 is fixed to the frame body 11 by fastening, forming a fixed end boundary condition, so that the valve plate 131 produces controlled elastic deformation on the head 1311 side, ensuring the durability and positional stability of the valve plate 131, improving the fitting reliability when closed and the angle accuracy when open; maintaining a consistent opening and closing threshold under long-term cycling, avoiding drift.

[0057] The head 1311 is used to open and close the oil outlet 121. The head 1311 is aligned with the oil outlet 121. When closed, it forms a sealing surface with the oil outlet 121. When open, it forms a controllable flow section with the oil outlet 121. At low speed and small pressure difference, the head 1311 opens moderately to ensure smooth oil discharge. At high speed and large pressure difference, the opening of the head 1311 is constrained by elasticity and flow field, forming a throttling effect, suppressing excessive instantaneous flow and high-speed jet, and reducing external overflow and entrainment.

[0058] With the head 1311 in contact with the oil outlet 121, the head 1311 covers the oil outlet 121. The contact ensures the continuity of the sealing line, and the coverage ensures that the sealing surface area is sufficient and there are no bypass gaps, avoiding edge leakage and flow around, achieving effective backflow prevention and rapid closure, reducing mutual interference and vortex shedding between the gas and liquid phases at the oil outlet 121, eliminating the conditions for the free liquid surface to be torn apart by high-speed airflow, and significantly reducing the oil discharge rate and oil mist discharge under high-frequency operating conditions; at the same time, it blocks backflow during shutdown or low pressure differential momentary, preventing abnormal fluctuations and re-entrapment of the liquid surface in the inner cavity 112.

[0059] In summary, the connection and radial positional relationship between the oil discharge channel 12, the oil outlet 121, and the inner cavity 112 establish a steady-state pressure difference and directional flow from the inside out. The valve plate 131 in the valve assembly 13 operates with its tail 1312 fixed and its head 1311 either closed or open, utilizing the balance between elasticity and fluid load to create an adaptive opening that changes with operating conditions. At low speeds, this ensures unrestricted oil flow; at high speeds, the head 1311 partially covers and throttles the oil outlet 121, reducing the peak outlet velocity and jet kinetic energy, and suppressing overflow and entrainment. The close contact and covering relationship ensures clear closure and throttling boundaries, improving the effectiveness of check valves and flow restriction. The detachable connection ensures maintainability and adjustability throughout its lifespan, ensuring that different platforms maintain lubrication safety while controlling the oil discharge rate within the target range.

[0060] In some embodiments, the mounting groove 14 is optionally a recessed structure formed in the outer periphery 111 of the frame body 11, creating a defined space for accommodating and positioning the valve assembly 13. The mounting groove 14 is located in the outer periphery 111, adjacent to the outlet of the oil drain channel 12, allowing the other end of the oil drain channel 12 to extend smoothly to the bottom of the mounting groove 14. The bottom of the groove serves as the outlet end face of the oil drain channel 12, and the valve assembly 13 is directly arranged within the mounting groove 14, providing mechanical positioning and fixing space for the valve assembly 13, ensuring the relative position of the valve plate 131 and the frame body 11 is stable, and preventing the valve plate 131 from shifting or loosening due to fluid impact or vibration. The groove structure enables the valve assembly 13 to be detachably installed, facilitating the assembly, maintenance, and replacement of components such as valve plate 131 or limiter 132, thereby improving the maintainability and flexibility of the equipment. It also allows the head 1311 of valve plate 131 to be precisely aligned with the outlet of oil drain channel 12, i.e., oil outlet 121, within the groove, ensuring the sealing and responsiveness of the opening and closing action. The presence of the mounting groove 14 reduces the risk of direct contact between the head 1311 of valve plate 131 and the external oil guide plate or housing, preventing damage or failure of valve plate 131 due to external interference.

[0061] The other end of the oil drain channel 12 extends to the bottom of the mounting groove 14. The oil drain channel 12 serves as the flow path for oil to exit from the inner cavity 112, with its outlet face located at the bottom of the mounting groove 14. The bottom of the groove acts as the terminal interface of the oil drain channel 12, allowing the oil to flow directly into the space containing the valve assembly 13 within the mounting groove 14. The tight fit between the outlet of the oil drain channel 12 and the bottom of the mounting groove 14 ensures a continuous and smooth oil flow path, preventing localized eddies and pressure losses due to abrupt changes in the fluid cross-section at the outlet.

[0062] Maintaining the stability and continuity of oil flow is beneficial for the head 1311 of valve plate 131 to open or close adaptively according to oil pressure and flow rate, reducing the turbulence of the local flow field at oil outlet 121, reducing the entrainment of air bubbles and gas-liquid mixing in the vicinity of the valve assembly, improving the reliability of valve plate 131 operation and sealing effect. Through the limitation of the bottom of the groove, valve plate 131 can obtain a stable support surface, enhance the uniformity of sealing pressure distribution, and extend the service life of valve plate 131.

[0063] The valve assembly 13 is fully arranged inside the mounting groove 14. The groove surrounds and protects the valve assembly. The valve assembly 13 in the mounting groove 14 is closely adjacent to the outlet of the oil drain channel 12. The head 1311 of the valve plate 131 directly covers the oil outlet 121, and the tail 1312 is fixed to the groove wall or bottom, forming a complete opening and closing mechanism. The valve assembly 13 is accurately and stably positioned in the mounting groove 14, preventing the valve plate 131 from being misaligned or loosened due to mechanical vibration or oil flow impact. The enclosure of the valve plate 131 by the mounting groove 14 limits its opening stroke. With the help of the limiter 132, the maximum opening angle is controlled, avoiding excessive deformation or failure of the valve plate 131. The head 1311 of the valve plate 131 is tightly fitted with the sealing surface of the oil outlet 121, improving the valve's check valve effect and throttling control capability, and reducing the overflow and oil discharge rate caused by high-speed oil injection at high speeds.

[0064] It is understood that the outer periphery 111 of the frame body 11 is provided with a mounting groove 14. This groove extends the outlet of the oil drain channel 12, forming the final outlet area for oil flow. The valve assembly 13 (valve plate 131 and its fixing structure) is rationally placed in this groove, forming an integrated flow control unit. The oil drain channel 12 extends radially outward from the inner cavity 112 and finally reaches the bottom of the mounting groove 14, ensuring a continuous and stable oil flow path. The oil flows from the inner cavity 112 into the oil drain channel 12 and is finally discharged with a limited flow rate through the valve assembly 13 in the mounting groove 14. The valve assembly 13 is connected to the frame body 11 via the tail 1312, and the head 1311 covers and opens / closes the oil outlet 121 in the mounting groove 14, using the elastic deformation of the valve plate 131 to achieve adaptive flow rate adjustment. The presence of the mounting groove 14 ensures the spatial limitation and positioning of the valve plate 131's movement, preventing the valve plate 131 from shifting or failing due to impact. At low speeds, the oil is discharged smoothly to meet the lubrication requirements of the eccentric crankshaft and the moving scroll hub. At high speeds and high pressure differentials, the valve plate 131 is limited in opening angle by oil pressure, forming a throttling effect, which suppresses high-speed oil injection and overflow, reduces the risk of oil overflow at the oil guide plate of the housing, reduces gas entrainment, and significantly reduces the oil discharge rate of the compressor 2 during high-frequency operation.

[0065] The mounting groove 14 is located on the outer periphery 111 of the frame body 11. The other end of the oil drain channel 12 extends to the bottom of the mounting groove 14. The mounting groove 14 is located on the outer periphery 111, and the bottom of the groove is the outlet of the oil drain channel 12, providing a fixed space and positioning surface for the valve assembly 13. The valve plate 131 is stably positioned and operates accurately, preventing displacement and damage. The valve assembly 13 is located in the mounting groove 14. The tail 1312 of the valve plate 131 is connected to the frame body 11, and the head 1311 covers the oil outlet 121. The valve assembly 13 is adjacent to the outlet of the oil drain channel 12, and the head 1311 fits against the oil outlet 121. The valve plate 131 realizes opening and closing control. The mounting groove 14 restricts the opening stroke of the valve plate 131, allowing for smooth oil drainage at low speeds and throttling and flow restriction at high speeds, reducing overflow and oil discharge rate. The first end of the oil drain channel 12 is connected to the inner cavity 112, and the other end of the oil drain channel 12 extends to the bottom of the mounting groove 14. The inner cavity 112 is radially inward, and the oil drain channel 12 is radially outward to the outer periphery 111. The oil flows from the inner cavity 112 into the oil drain channel 12 and is smoothly discharged. The oil flow path is stable and continuous, reducing local eddies and bubble entrainment.

[0066] In some embodiments, optionally, the tail portion 1312 of the valve plate 131 is detachably connected, specifically via, for example... Figure 1 The bolts 16 shown are used to fix or securely connect to the bottom of the mounting groove 14 via clips, pins, etc., but the connection method allows for disassembly, which facilitates the disassembly and replacement of the valve assembly 13.

[0067] The tail section 1312 is mechanically fixed to the bottom of the tank, and the fixed end boundary conditions of the valve plate 131 are clear, ensuring that the elastic deformation of the valve plate 131 under fluid load is controllable and stable. The detachable connection makes the connection between the valve plate 131 assembly and the frame body 11 both firm and flexible, meeting maintenance and debugging needs. The tail section 1312 is precisely positioned on the fixed surface of the bottom of the tank and fixed by the connector, ensuring the integrity of the cantilever structure of the valve plate 131. The head section 1311 can be accurately aligned with and cover the oil outlet 121, avoiding sealing failure or opening / closing failure due to loosening.

[0068] Mechanical fixing ensures that the tail 1312 of the valve plate 131 does not experience invalid displacement or loosening, maintaining the designed elastic deformation characteristics and preventing accelerated fatigue failure. The detachable connection allows for quick disassembly and replacement of the valve plate 131 assembly, reducing maintenance time and costs and increasing equipment uptime. Valve plates 131 with different stiffness, thickness, or materials can be replaced according to operating conditions to optimize and adapt valve performance. The stable fixing of the tail 1312 of the valve plate 131 ensures a tight fit between the head 1311 and the oil outlet 121, preventing leakage or abnormal opening due to misalignment and improving the oil discharge rate control capability of the compressor 2 during high-frequency operation.

[0069] Optionally, if bolted, the tail 1312 of the valve plate 131 has a pre-drilled mounting hole that matches the threaded hole at the bottom of the mounting groove 14. Bolts and spring washers are used for fixing, and the anti-loosening design prevents vibration-induced loosening. If snap-fit, the tail 1312 of the valve plate 131 has a snap-fit ​​tongue or pin, and the bottom of the groove has a corresponding slot for quick insertion and removal, suitable for rapid replacement scenarios. If pinned, the pin passes through the tail 1312 of the valve plate 131 and the positioning hole at the bottom of the groove, with a spring pin for anti-loosening, balancing easy disassembly and assembly with secure fixing.

[0070] Optionally, the tail portion 1312 of the valve plate 131 must have sufficient thickness and strength to withstand the mechanical load of the fixed connection and the reaction force generated by elastic deformation. The connecting hole and the mounting surface at the bottom of the groove must be machined with high precision to ensure that the tail portion 1312 of the valve plate 131 fits snugly against the bottom plane of the groove during assembly, avoiding stress concentration and fatigue cracks. The material and surface treatment of the valve plate 131 must balance wear resistance, corrosion resistance, and elasticity to ensure long-term cycle life.

[0071] In this solution, the fixed end boundary conditions of valve plate 131 are clearly defined, which enhances the controllability of elastic deformation and sealing reliability of valve plate 131 during operation, while supporting quick disassembly and replacement to meet actual production and maintenance needs.

[0072] In some embodiments, the limiter 132 is optionally part of the valve assembly 13 and is located on the side of the valve plate 131 away from the oil outlet 121. Specifically, the limiter 132 is installed on the groove wall of the mounting groove 14, and the projection of the limiter 132 is completely inside the groove wall and does not exceed the groove wall boundary.

[0073] The limiter 132 is fixedly connected to the wall of the mounting groove 14, usually by bolts, rivets or embedded structure. A certain gap is maintained between the limiter 132 and the valve plate 131 to limit the maximum opening angle or stroke of the valve plate 131.

[0074] The limiter 132 is located inside the groove wall of the mounting groove 14, ensuring that its structure is compact and does not interfere with the movement space of the head 1311 of the valve plate 131 and the oil outlet 121. Since the projection of the limiter 132 is located inside the groove wall, it ensures that the overall size of the valve assembly 13 does not exceed the range of the mounting groove 14, which facilitates overall assembly.

[0075] The limiter 132 prevents the valve plate 131 from opening excessively, which could lead to sealing failure or damage, by limiting the opening angle or stroke of the valve plate 131. It also controls the elastic deformation range of the valve plate 131, ensuring that the valve plate 131 operates within the designed safe range, thereby improving the reliability and lifespan of the valve assembly 13 and preventing fatigue damage caused by excessive deformation.

[0076] It is understood that the limiter 132 is located on the side of the valve plate 131 away from the oil outlet 121 and is fixed to the wall of the mounting groove 14. The limiter 132 is mechanically fixed to the groove wall, limiting the opening angle of the valve plate 131. The projection of the limiter 132 is completely located within the groove wall, which is compact and does not interfere with the movement of the valve plate 131. It limits the maximum opening of the valve plate 131, prevents over-opening and damage, and controls the movement of the valve plate 131, avoiding fatigue damage and improving reliability.

[0077] The limiter 132 is installed on the inner side of the mounting groove 14, located on the side of the tail 1312 of the valve plate 131 away from the oil outlet 121. It limits the maximum opening angle of the valve plate 131, prevents the valve plate 131 from being over-opened, protects the structural safety, ensures sealing performance, and enables the valve assembly 13 to achieve precise flow regulation and check flow function under high and low speed conditions, effectively reducing the oil discharge rate during high-frequency operation.

[0078] In some embodiments, optionally, the angle between the axis of the oil outlet 121 and the axis of the inner cavity 112 is in the range of 30° to 150°, wherein the axis of the inner cavity 112 is the central axis of the inner cavity 112 of the frame body 11, which is generally consistent with or parallel to the rotation axis of the drive shaft or the compressor 2, and the axis of the oil outlet 121 refers to the direction of the central axis of the oil outlet 121 at the outlet of the oil discharge channel 12. By limiting the angle between the axis of the oil outlet 121 and the axis of the inner cavity 112 to within the range of 30° to 150°, the radial or oblique extension direction of the oil discharge channel 12 is defined, so that the oil flow direction is deflected from the axis of the inner cavity 112. The angle range ensures that the arrangement of the oil discharge channel 12 and the oil outlet 121 avoids being parallel to the axis of the inner cavity 112 or too perpendicular, so that the outlet direction of the oil discharge channel 12 is reasonably deflected from the axis of the inner cavity 112, avoiding straight high-speed injection of oil, reducing the impact energy at the oil outlet, reducing local eddies and bubble entrainment, and stabilizing the oil flow state.

[0079] The angled arrangement allows the oil drain channel 12 and mounting groove 14 to be rationally positioned on the outer periphery 111 of the frame body 11, effectively utilizing limited space, avoiding interference with other structures (such as drive shafts, seals, and motor components), and facilitating the installation and maintenance of the valve assembly 13. Furthermore, the angled design helps optimize the structural strength of the oil drain channel 12 and oil outlet 121, avoiding fatigue and leakage risks caused by excessively long channels or sharp bends, improving the overall rigidity and sealing reliability of the frame body 11, and extending its service life.

[0080] The optimized lubricating oil return path guides the lubricating oil from the inner cavity 112 along a reasonable path to the oil guide plate and the stator edge of the motor, promoting the oil to fall evenly back to the bottom oil pool, optimizing the oil return, reducing oil retention and gas-liquid mixing, and improving lubrication efficiency and compressor 2 stability.

[0081] In summary, this structural feature defines the angle range (30°~150°) between the axis of the oil outlet 121 and the axis of the inner cavity 112. Through reasonable flow deflection and spatial arrangement, it achieves stable guidance of oil flow, effective installation and sealing control of valve assembly 13, and significantly improves the lubricating oil discharge control effect of the scroll compressor 2 and its performance during high-frequency operation.

[0082] Optionally, in some embodiments, the oil guide groove 151 is a groove-like structure formed in the outer periphery 111 of the frame body 11, located in the lower region of the outer periphery 111, forming a defined flow channel or groove. The oil guide groove 151 is located below the outer periphery 111 in its height direction. The groove is adjacent to or connected to the outlet of the oil drain channel 12 and the mounting groove 14, forming a transition path for oil return. It collects the lubricating oil flowing from the oil drain channel 12 and the valve assembly 13, serving as a guide channel for oil return to the oil sump at the bottom of the compressor 2. It restricts the direction of oil flow, prevents oil splashing or splashing, reduces oil-gas mixing, provides stable oil film protection, and reduces splashing and turbulence during oil return.

[0083] The oil guide groove 151 in this design can effectively guide the lubricating oil to fall back smoothly, ensuring the continuous circulation of lubricating oil and oil pool replenishment, reducing the interface disturbance between oil and gas, reducing oil mist and oil discharge rate, improving the internal lubrication environment of compressor 2, and enhancing the overall operational stability and lifespan.

[0084] The oil guide component 152 is an oil guiding component installed on the outside or inside of the frame body 11. Its first end is located below the oil guide groove 151, and it is typically a tubular, groove-shaped, or plate-shaped structure used to guide oil flow. The first end of the oil guide component 152 is vertically or obliquely positioned below the oil guide groove 151, forming a continuous oil flow path. The oil guide component 152 cooperates with the oil guide groove 151 to form an oil return channel from the outer periphery 111 of the frame to the oil sump at the bottom of the compressor 2. Under the action of the oil guide component 152, it can receive the lubricating oil flowing out of the oil guide groove 151 and continue to guide the oil downwards, preventing oil splashing and reducing energy loss during the oil return process. Through structural design, it controls the oil flow rate and direction, avoiding gas-liquid mixing during oil return, efficiently completing the oil return from the frame to the oil sump, and ensuring the continuity of lubricating oil circulation.

[0085] In summary, the oil guide groove 151 is located below the outer periphery 111 of the frame body 11, serving as the first collection and guiding area for lubricating oil after it flows out from the oil drain channel 12 and valve assembly 13, forming the starting point for the oil to return to the oil sump at the bottom of the compressor 2. The first end of the oil guide component 152 is located below the oil guide groove 151, receiving the oil flowing out of the oil guide groove 151 and continuing to guide the oil to flow back smoothly, forming a complete oil return channel system. This design ensures the orderly flow of lubricating oil, avoids splashing and gas-liquid mixing during the return process, and reduces the system's oil discharge rate and oil mist pollution. The reasonable layout of the oil guide groove 151 and the oil guide component 152, combined with the throttling effect of the valve assembly 13, jointly achieves effective discharge and return of lubricating oil under high-frequency and high-speed operating conditions, improving the operational stability and lifespan of the compressor 2.

[0086] In some embodiments, the oil guide 152 is optionally an oil guide structure extending along the height direction of the frame body 11. The first end of the oil guide 152 is located at a higher position in the height direction, and the second end is located at a lower position. The radial distance of the second end relative to the axis of the inner cavity 112 is greater than the radial distance of the first end relative to the axis of the inner cavity 112. That is, the oil guide 152 is inclined or bent from top to bottom outward.

[0087] The first end of the oil guide 152 is located below the oil guide groove 151 to receive oil; the second end extends and is offset to a position further away from the axis of the inner cavity 112. The oil guide 152 serves as a continuation channel for the oil flowing out of the oil guide groove 151 to return to the oil sump at the bottom of the compressor 2.

[0088] The oil guide 152 extends downward from the oil guide groove 151 and is offset radially outward to form an inclined or curved flow path, so that the oil not only flows downward during the backflow process, but also diffuses radially outward, which is conducive to the uniform distribution of oil.

[0089] In summary, the oil guide component 152, as a continuation of the oil guide groove 151, extends downward from a higher position while being radially offset outward, forming an inclined return channel for the oil. Together with the oil guide groove 151 and the valve assembly 13, it ensures that the lubricating oil flows smoothly from the inner cavity 112 of the main frame through the oil discharge channel 12, the mounting groove 14, the oil guide groove 151, and the oil guide component 152, and finally falls evenly back to the oil sump at the bottom of the compressor 2. The radial outward expansion of the oil reduces the local velocity peaks and eddies of the oil in the return path, reducing the risk of oil splashing and gas-liquid mixing, and helps to reduce the oil discharge rate under high speed and high frequency operating conditions. The inclined layout of the oil guide component 152 also helps to make reasonable use of the internal space of the frame, avoid interference with key components such as motors and seals, and improve the overall structural compactness and reliability.

[0090] In some embodiments, the valve assembly 13 (including valve plate 131, limiter 132 and its fixing parts, etc.) is optionally installed in the mounting groove 14 of the frame body 11. Its overall size and installation status ensure that its outer surface does not exceed the outer wall contour line of the outer periphery 111 of the frame body 11. That is, the valve assembly 13 does not protrude outward beyond the outer boundary of the outer periphery 111 of the frame in the radial direction. The valve assembly 13 is fixed in the mounting groove 14. The groove depth and size design ensure that the valve assembly 13 is completely accommodated in the groove. The head 1311 of the valve plate 131 covers the oil outlet 121, but the maximum opening stroke of the valve plate 131 and the limiter 132 is still controlled within the range of the outer wall.

[0091] The valve assembly 13 is arranged inside the outer periphery 111 of the frame body 11 and embedded in the mounting groove 14. The valve assembly 13 and the outer wall of the frame body 11 form a flush or concave spatial relationship.

[0092] In summary, the valve assembly 13, serving as an oil discharge flow control unit, is installed within the mounting groove 14 on the outer periphery 111 of the frame body 11. Its overall size and opening stroke are confined within the outer wall of the outer periphery 111, ensuring that the valve assembly 13 does not protrude and affect the installation and fit of the housing or oil guide plate, thus avoiding mechanical interference and frictional damage. The embedded design facilitates a tight fit and reliable seal between the head 1311 of the valve plate 131 and the oil outlet 121, reducing oil leakage and discharge rate. Simultaneously, the valve assembly 13 is enclosed by the frame body 11, enhancing its mechanical strength and impact resistance, extending its service life. During maintenance, the valve assembly 13 can be directly disassembled through the mounting groove 14 without disassembling the frame or housing, improving maintenance convenience.

[0093] like Figure 3 As shown, this application provides an embodiment of a compressor 2. The compressor 2, through the main frame structure 1, can achieve efficient return and discharge control of lubricating oil. Especially under high-speed and high-frequency operating conditions, it significantly reduces the oil discharge rate and oil-gas mixing, thereby improving the operating stability and lifespan of the compressor 2.

[0094] Since the compressor 2 of this embodiment includes any of the above-mentioned main frame structures 1, it has the beneficial effects of any of the above-mentioned main frame structures 1, which will not be repeated here.

[0095] like Figure 4 As shown, this application provides an embodiment of a refrigeration device 3. By employing the above-mentioned compressor 2, efficient and stable compressor 2 operation performance is achieved. The refrigeration device 3 has a compact structure, is easy to maintain, is suitable for various refrigeration systems, and improves the overall system performance.

[0096] Among them, refrigeration equipment 3 includes, but is not limited to, refrigerators, freezers, air conditioners and other equipment with refrigeration functions.

[0097] Since the refrigeration device 3 of this embodiment includes any of the above-mentioned compressors 2, it has the beneficial effects of any of the above-mentioned compressors 2, which will not be described in detail here.

[0098] This application also provides a specific embodiment, providing a main frame oil outlet drain valve assembly structure. The inner wall of the main frame has an inner surface facing the inner cavity. The main frame oil outlet is located on the inner surface of the cavity. An oil outlet (i.e., an oil drain hole) is provided in the radial groove (i.e., mounting groove) of the main frame. The drain valve assembly includes an oil baffle valve plate (i.e., a valve plate) and a limiter (i.e., a limiter). The oil baffle valve plate has a head and a tail. The tail is fixed on the inner plane of the groove of the main frame, and the head cooperates with the groove surface of the main frame to open or close the drain hole. The limiter has the same shape as the drain valve plate. The drain valve plate is located between the main frame groove plane and the limiter, and one end is connected by a bolt.

[0099] By using the elastic deformation and stroke design of the oil drain valve plate, the oil flowing from the oil drain channel of the main frame is prevented from overflowing from the oil guide plate of the casing when the compressor is running at high speed. This would prevent the oil return path from being effectively constrained, which would lead to an increase in the oil discharge rate of the compressor at high frequencies.

[0100] This application also provides a specific embodiment of a main frame for a scroll compressor. The main frame includes a support portion and a chamber located inside the support portion in the radial direction. The main frame is provided with an oil drain pipe for communicating radially outward between the chamber and the main frame base. The oil drain pipe includes a protrusion extending radially outward from the inner wall of the support portion and located outside the chamber. The protrusion includes an oil outlet, which is at least partially formed on the circumferential sidewall. The oil outlet has an outwardly convex structure, and a sealing groove is provided on the wall surface.

[0101] An oil drain valve assembly includes a limiter and an oil drain valve plate. When the oil drain hole is closed, the projection of the head of the oil drain valve plate on the outer end face of the main frame is located within a groove. The opening angle of the valve plate is between 30° and 42°.

[0102] A scroll compressor, comprising the main frame and the oil discharge valve assembly as described above.

[0103] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0104] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0105] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which 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.

[0106] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mainframe structure, characterized in that, include: The frame body has an outer peripheral portion and an inner cavity located radially inside the outer peripheral portion; An oil drain channel is provided, one end of which is connected to the inner cavity, and the other end of which is provided with an oil outlet located on the outer periphery. A valve assembly is detachably connected to the frame body. The valve assembly includes a valve plate, which includes a connected head and a tail. The tail is connected to the frame body. The head is used to open and close the oil outlet, and when the head is in contact with the oil outlet, the head covers the oil outlet.

2. The mainframe structure according to claim 1, characterized in that, Also includes: An installation groove is provided on the outer periphery, and the other end of the oil drain channel extends to the bottom of the installation groove; The valve assembly is located within the mounting groove.

3. The mainframe structure according to claim 2, characterized in that, The tail section is detachably connected to the bottom of the mounting groove.

4. The mainframe structure according to claim 2, characterized in that, The valve assembly also includes: A limiter is provided on the side of the valve plate away from the oil outlet; The projection of the limiter on the wall of the mounting groove is located inside the groove wall.

5. The mainframe structure according to claim 1, characterized in that, The angle between the axis of the oil outlet and the axis of the inner cavity is in the range of 30° to 150°.

6. The mainframe structure according to claim 1, characterized in that, The mainframe structure also includes: An oil guide groove is provided on the outer periphery, and the oil guide groove is located below the outer periphery in the height direction; An oil guide component, wherein the first end of the oil guide component is located below the oil guide groove in the height direction.

7. The mainframe structure according to claim 6, characterized in that, The oil guide extends along the height direction, and the distance between the second end of the oil guide and the axis of the inner cavity is greater than the distance between the first end of the oil guide and the axis of the inner cavity.

8. The mainframe structure according to claim 1, characterized in that, The valve assembly does not protrude from the outer wall surface of the outer periphery.

9. A compressor, characterized in that, include: The main frame structure as described in any one of claims 1 to 8.

10. A refrigeration device, characterized in that, include: The compressor as described in claim 9.

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