Compressors, refrigeration equipment, and oil rings

Abstract

The present invention relates to a compressor, refrigeration equipment, and an oil ring, and belongs to the technical field of compressors. The compressor comprises a case, a motor mounted inside the case, a pump assembly having a cylinder mounted inside the case and located below the motor, and an oil ring mounted inside the case and located between the cylinder and the motor, with at least a portion of its outer edge spaced apart from the inner wall of the case.

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application Nos. 202410077924.5 and 202420131212.2 filed with the China National Intellectual Property Administration on January 18, 2024, and incorporates the full text thereof herein by reference.

[0002] This application relates to the technical field of compressors, and specifically to compressors, refrigeration equipment, and oil rings.

Background Art

[0003] During the operation of a compressor, the motor assembly rotates the crankshaft to achieve the compression effect on the gas by the pump assembly. However, due to the high-speed rotation of the rotor of the motor and the crankshaft, and the high-pressure gas at the exhaust port of the pump assembly, a turbulent flow field is formed, disturbing the stability of the oil level in the oil sump of the compressor, causing the lubricating oil in the oil sump to move upward together with the refrigerant gas and reach the upper space of the motor, reducing the liquid level of the oil sump. And because the pressure in the lower space of the motor assembly is greater than the pressure in the upper space, lubricating oil is likely to accumulate in large quantities on the motor side, the reflux speed is slow, and the phenomenon that the oil level of the oil sump is too low occurs, affecting the lubrication conditions of each moving pair of the pump assembly, increasing the wear between each component, and ultimately affecting the reliability of the compressor.

Summary of the Invention

[0004] This application aims to solve at least one of the technical problems in the related art. For this purpose, this application proposes a compressor, refrigeration equipment, and oil ring that improve the stability of the oil level of the lubricating oil in the compressor and ensure the reflux efficiency of the lubricating oil.

[0005] In a first aspect, this application provides a case, a motor mounted in the case, [[ID=A pump assembly comprising a cylinder mounted inside the case and located below the motor, The present invention provides a compressor comprising an oil ring mounted within the case and positioned between the cylinder and the motor, with at least a portion of its outer edge spaced apart from the inner wall of the case.

[0006] According to one embodiment of this application, the oil ring is connected to the inner wall of the case.

[0007] According to one embodiment of the present application, the outer edge of the oil ring is provided with a notch that is recessed toward the axis of the oil ring, the oil ring is separated from the inner wall of the case at the position of the notch, and the outer edge of the oil ring is connected to the inner wall of the case at the position where the notch is not provided.

[0008] According to one embodiment of this application, a plurality of notches are provided, and the plurality of notches are spaced apart along the circumferential direction of the oil ring.

[0009] According to one embodiment of this application, the spacing distance between at least two sets of adjacent notches is provided to be different.

[0010] According to one embodiment of this application, the shapes of at least two of the notches are provided to be different.

[0011] According to one embodiment of the present application, the spacing distance between at least two sets of adjacent notches is provided to be different, and the shapes of at least two of the notches are provided to be different.

[0012] According to one embodiment of this application, the outer edge of the notch is one of the following: arc-shaped, straight, bent, and wavy.

[0013] According to one embodiment of this application, the oil ring is provided with a recirculation hole that penetrates in the vertical direction.

[0014] According to one embodiment of the present application, the oil ring is provided with a plurality of recirculation holes, and the plurality of recirculation holes are distributed along the circumferential direction of the oil ring.

[0015] According to one embodiment of this application, one of the plurality of reflux holes corresponds to a vane groove of the cylinder in the vertical direction.

[0016] According to one embodiment of this application, the pump assembly is The cylinder further comprises an upper bearing mounted on the upper surface, The oil ring is located above the upper bearing, The upper bearing is provided with a communication hole, and the communication hole and the recirculation hole are positioned offset from each other in the vertical direction.

[0017] According to one embodiment of this application, the pump assembly is The upper bearing is further equipped with a silencer attached to the side away from the cylinder, and the silencer is provided with an exhaust port. The oil ring is provided around the outside of the silencer, and the inner surface of the oil ring is provided at a distance from the silencer.

[0018] According to one embodiment of this application, when the thickness of the oil ring in the vertical direction is W1 and the thickness of the main body portion of the upper bearing in the vertical direction is W2, The condition satisfies 3mm ≤ W1 ≤ W2.

[0019] According to one embodiment of this application, the radial cross-sectional shape of the reflux hole is circular, elliptical, or polygonal.

[0020] According to one embodiment of this application, the radial cross-sectional dimensions of the reflux hole are provided to change along the axial direction.

[0021] According to one embodiment of this application, the reflux hole is provided in a columnar shape.

[0022] According to an embodiment of the present application, when the height of the case in the vertical direction is H and the distance between the upper surface of the oil ring and the upper surface of the case is H1, it satisfies 2 / 5 ≦ H1 / H ≦ 7 / 10.

[0023] According to an embodiment of the present application, the motor is provided so as to be separated from the inner wall of the case.

[0024] As a second aspect, the present application provides a refrigeration device including the compressor according to any one of the first aspects.

[0025] As a third aspect, the present application provides an oil ring applied to a compressor. A notch recessed toward the axis of the oil ring is provided on the outer peripheral edge of the oil ring. The oil ring is separated from the inner wall of the case of the compressor at the position of the notch, and the outer peripheral edge of the oil ring is provided so as to connect to the inner wall of the case of the compressor at the position where the notch is not provided.

[0026] Additional aspects and advantages of the present invention will be shown partially in the following description, will become apparent partially from the following description, or will be understood through the practice of the present invention.

Brief Description of Drawings

[0027] The above and / or additional aspects and advantages of the present application will be apparent and easier to understand from the description of embodiments related to the following attached drawings.

[0028] [Figure 1] It is a structural schematic diagram of a compressor according to an embodiment of the present application. [Figure 2] It is an enlarged view of part A in FIG. 1. [Figure 3] It is a structural schematic diagram of a pump assembly according to an embodiment of the present application. [Figure 4] It is a second structural schematic diagram of a pump assembly according to an embodiment of the present application. [Figure 5]This is the first schematic diagram of the structure of the oil ring according to an embodiment of this application. [Figure 6] This is the first schematic diagram of the structure of the upper bearing according to an embodiment of this application. [Modes for carrying out the invention]

[0029] The following describes embodiments of the present invention in detail, which are shown in the drawings, where the same or similar reference numerals from beginning to end indicate the same or similar elements, or elements having the same or similar function. The embodiments described below with reference to the drawings are illustrative and intended to illustrate the present invention, and should not be understood as limiting the invention.

[0030] The compressor 10 according to the embodiment of this application will be described below with reference to Figures 1 to 6. The compressor 10 according to the embodiment of this application can be applied to refrigeration systems or heat pump systems, and as a core component of the system, it provides the system with a high-temperature, high-pressure refrigerant. The compressor 10 may be used in refrigeration systems such as air conditioners, refrigerators, and water dispensers, or in heat pump systems such as air energy water heaters and floor heating systems.

[0031] As shown in Figure 1, the compressor 10 according to the embodiment of this application comprises a case 100, a motor 300, a pump assembly 200, and an oil ring 600.

[0032] A mounting cavity 140 is formed inside the case 100, and the motor 300, pump assembly 200, and oil ring 600 are all fixedly mounted inside the mounting cavity 140.

[0033] To make it clear, the pump assembly 200 and motor 300 may be fixed to the case 100 by welding, by shrink fitting, or by any other feasible method of fixing, without any particular limitation. The bottom of the mounting cavity 140 is formed as an oil reservoir, which contains lubricating oil that lubricates and cools the pump assembly 200 and motor 300, thereby improving the operational stability of the compressor 10.

[0034] As shown in Figure 1, the case 100 of the embodiment of this application may include a main case 110, an upper case 120, and a lower case 130. The main case 110 may be cylindrical, the upper case 120 may be fixedly connected to the upper end of the main case 110, the lower case 130 may be fixedly connected to the lower end of the main case 110, a base 150 may be attached to the bottom of the lower case 130, and the base 150 may be used to mount the compressor 10.

[0035] The compressor 10 may further include an exhaust pipe 400 and an accumulator 500. The exhaust pipe 400 may be connected to the upper end of the case 100, and exemplary, the exhaust pipe 400 may be fixedly connected to the upper end of the upper case 120. The accumulator 500 may be connected to the main case 110, and exemplary, the accumulator 500 may be connected by a connecting belt, thereby improving the connection stability of the accumulator 500. The accumulator 500 supplies refrigerant gas to the pump assembly 200 by being connected to the pump assembly 200 via an intake pipe 510. As can be understood, since the pump assembly 200 of the embodiment of this application may have two cylinders, two intake pipes 510 are provided, and the two intake pipes 510 each supply refrigerant gas to the two corresponding cylinders.

[0036] As shown in Figure 1, the compressor 10 in the embodiment of this application may be a two-cylinder compressor 10. The pump assembly 200 may include an upper bearing 210, an upper cylinder 220, a partition plate 230, a lower cylinder 240, and a lower bearing 250. The upper bearing 210, upper cylinder 220, partition plate 230, lower cylinder 240, and lower bearing 250 are connected sequentially in the vertical direction in the figure. The upper cylinder 220 and lower cylinder 240 are fixedly connected to the case 100, thereby ensuring a stable connection of the pump assembly 200. To make it clear, the pump assembly 200 may be fixedly connected to the case 100 via components such as the upper bearing 210 and the lower bearing 250.

[0037] The motor 300 comprises a stator 310 and a rotor 320, the stator 310 may be fixedly connected to the case 100, a cavity formed inside the stator 310, and the rotor 320 rotatably mounted within the cavity. The pump assembly 200 further comprises a crankshaft 260, the crankshaft 260 fixedly connected to the rotor 320 and rotationally driven by the motor 300. The crankshaft 260 comprises a connected main shaft portion 261 and two vertically distributed eccentric portions 262. The main shaft portion 261 is rotatably connected to an upper bearing 210 and a lower bearing 250, and the two eccentric portions 262 are rotatably mounted to an upper cylinder 220 and a lower cylinder 240, respectively. As the crankshaft 260 rotates, it compresses the refrigerant gas entering the cylinder from the intake pipe 510, and the compressed high-temperature, high-pressure refrigerant is exhausted into the mounting cavity 140 of the case 100 through the exhaust port of the pump assembly 200, and finally exhausted from the compressor 10 through the exhaust pipe 400.

[0038] In some other embodiments, the compressor 10 of the embodiment of this application may be a single-cylinder compressor 10. To understand this, the pump assembly 200 comprises a sequentially connected upper bearing 210, a cylinder and a lower bearing 250. The pump assembly 200 further comprises a crankshaft 260, the main shaft portion 261 of the crankshaft 260 being rotatably connected to the main bearing and the secondary bearing, and the eccentric portion 262 of the crankshaft 260 being rotatably provided within the cylinder.

[0039] In this embodiment, the pump assembly 200 is provided below the motor 300, thereby mounting the cylinder below the motor 300, and the oil ring 600 is mounted in the mounting cavity 140 of the case 100 and positioned between the cylinder and the motor 300, with at least a portion of the outer edge of the oil ring 600 spaced apart from the inner wall of the case 100.

[0040] As shown in Figures 1 to 5, the dotted line in Figure 5 represents the inner wall of the case 100. The oil ring 600 may be provided in an annular shape and installed to surround the outside of the pump assembly 200. By installing the oil ring 600 between the cylinder and the motor 300, the oil ring 600 is positioned above the cylinder, and therefore the oil ring 600 covers the upper side of the oil reservoir and does not affect the lubrication of the pump assembly 200 by the oil reservoir. To understand this, during the operation of the compressor 10, the fast flow of gas inside the compressor 10 guides the lubricating oil upward, and the high-speed rotation of the crankshaft 260 and the rotor 320 of the motor 300 causes the lubricating oil to splash onto the upper end surface of the motor 300 and accumulate on the upper side of the motor 300. Furthermore, the oil in the oil supply hole of the crankshaft 260 is easily drawn out and becomes turbulent, generating vortices which can affect the lubrication effect of the compressor 10, causing the oil level at the center of the oil reservoir to drop, which is unfavorable for lubricating the crankshaft 260.

[0041] By installing the oil ring 600 above the oil reservoir, the vertical projection of the oil ring 600 can at least partially shield the gap between the pump assembly 200 and the inner wall of the case 100. The oil ring 600 blocks the influence of the flow field generated between the motor 300 and the pump assembly 200 on the oil reservoir, and the oil ring 600 can come into contact with the liquid surface of the oil reservoir when the compressor 10 is operating, reducing the probability of vortex generation and effectively suppressing fluctuations in the liquid surface of the oil reservoir.

[0042] During the operation of a compressor, lubricating oil guided to the upper side of the oil ring is normally recirculated downward along the inner wall of the case into the oil reservoir. In related technologies, the outer edge of the oil ring is in complete contact with the case, and recirculation occurs only through leak holes provided in the oil ring. These leak holes are at a certain distance from the outer edge of the oil ring, and the lubricating oil recirculating downward along the inner wall of the case must move radially inward from the outer edge of the oil ring to the leak holes to recirculate, which lengthens the recirculation path and has a certain effect on recirculation efficiency.

[0043] In this embodiment, at least a portion of the outer edge of the oil ring 600 is provided spaced apart from the inner wall of the case 100, thereby forming a relief gap. This allows the lubricating oil that flows downward along the inner wall of the case 100 to flow directly back into the oil reservoir through the relief gap. The oil ring 600 suppresses fluctuations in the oil level of the oil reservoir, minimizes the impact on the return efficiency of the lubricating oil, improves the return velocity of the lubricating oil, and ensures a sufficient amount of oil in the oil reservoir.

[0044] It is important to explain that, if the compressor 10 is a multi-cylinder compressor 10, the oil ring 600 is positioned between the uppermost cylinder and the motor 300.

[0045] According to the embodiment of the present application, by providing an oil ring 600, fluctuations in the oil level inside the case 100 can be suppressed when the compressor 10 is operating. Furthermore, by separating at least a portion of the outer edge of the oil ring 600 from the inner wall of the case 100 to form a gap, the lubricating oil on the inner wall of the case 100 can be smoothly recirculated through the gap to the oil reservoir below, resulting in high recirculation efficiency, improved stability of the oil amount in the oil reservoir, and ultimately improved reliability and performance of the compressor 10.

[0046] According to some embodiments of this application, as shown in Figures 1 and 2, the oil ring 600 may be connected to the inner wall of the case 100.

[0047] In this embodiment, the oil ring 600 may be made of metal so that it has a certain structural strength. Here, the outer edge of the oil ring 600 may be welded to the inner wall of the case 100 in order to improve the assembly strength of the oil ring 600.

[0048] In other embodiments, the oil ring 600 may be fixedly connected to the pump assembly 200 such that the outer edge of the oil ring 600 is completely separated from the inner wall of the case 100 to further improve the recirculation efficiency. Exemplarily, the oil ring 600 may be fixedly connected to the upper bearing 210.

[0049] According to some embodiments of this application, as shown in Figures 4 and 5, the outer edge of the oil ring 600 may be provided with a notch 610 recessed toward the axis of the oil ring 600, and the oil ring 600 may be separated from the inner wall of the case 100 at the position of the notch 610 to form a relief gap, and the outer edge of the oil ring 600 may be connected to the inner wall of the case 100 at the position where the notch 610 is not provided, thereby fixing the oil ring 600 to the inner wall of the case 100 and forming a relief gap for the recirculation of lubricating oil.

[0050] According to some embodiments of this application, as shown in Figures 4 and 5, there may be multiple notches 610, and the multiple notches 610 may be spaced apart along the circumferential direction of the oil ring 600. By providing multiple notches 610, the flow area of ​​the relief gap formed between the oil ring 600 and the inner wall of the case 100 is improved, thereby improving the recirculation efficiency. Furthermore, by providing multiple notches 610 spaced apart along the circumferential direction of the oil ring 600, the recirculation of lubricating oil at each position in the circumferential direction of the case 100 is facilitated, improving the overall recirculation efficiency. At the same time, the portion between two adjacent notches 610 can be fixedly connected to the inner wall of the case 100, making the distribution of connection points between the oil ring 600 and the inner wall of the case 100 more uniform and the connection structure more stable.

[0051] According to some embodiments of this application, as shown in Figures 4 and 5, the spacing distance between at least two pairs of adjacent notches 610 may be different, and / or the shapes of at least two notches 610 may be different.

[0052] In this embodiment, the spacing distance between two adjacent notches 610 is not necessarily the same for all of them. The spacing distance between adjacent notches 610 in each pair may be different, or at least two pairs of adjacent notches 610 may be spaced differently. This results in the positions of the notches 610 being unevenly distributed in the circumferential direction of the oil ring 600.

[0053] In this embodiment, the line connecting both ends of the notch 610 and the axis of the oil ring 600 may form an angle, and the angles of the corresponding angles of each notch 610 are not all the same, that is, the size of the openings of each notch 610 is not all the same, and exemplary, the angles of the corresponding angles of each notch 610 may all be different, or at least two of the corresponding angles of the notches 610 may be different.

[0054] In this embodiment, the shape of each notch 610 does not have to be the same. For example, each notch 610 may have a different shape, or at least two of the notches 610 may have different shapes.

[0055] In this embodiment, the multiple notches 610 are arranged unevenly in the oil ring 600, facilitating the recirculation of the lubricating oil.

[0056] According to some embodiments of this application, as shown in Figures 4 and 5, the shape of the outer edge of the notch 610 is not specifically limited, and the outer edge of the notch 610 may be one of the following: arc-shaped, straight, bent, or wavy. This improves the passability of oil droplets, thereby reducing the formation of an oil seal that affects the passability of lubricating oil as it passes through the gap between the notch 610 of the oil ring 600 and the inner wall of the case 100.

[0057] According to some embodiments of this application, as shown in Figures 4 and 5, the oil ring 600 may be provided with a return hole 620 that penetrates vertically. By providing a return hole 620 in the oil ring 600, the lubricating oil that falls directly to the upper surface of the oil ring 600, and the lubricating oil that flows to the upper surface of the oil ring 600 along the connection point between the inner wall of the case 100 and the oil ring 600, can be returned to the oil reservoir through the return hole 620, thereby improving the return efficiency of the lubricating oil.

[0058] According to some embodiments of this application, as shown in Figures 4 and 5, the oil ring 600 may have a plurality of recirculation holes 620, and the plurality of recirculation holes 620 may be distributed along the circumferential direction of the oil ring 600. By providing a plurality of recirculation holes 620, the covering area of ​​the recirculation holes 620 is increased, improving the recirculation efficiency of the lubricating oil. By distributing the plurality of recirculation holes 620 along the oil ring 600, the uniformity of the arrangement of the recirculation holes 620 is improved, facilitating the recirculation of lubricating oil at each position and improving the recirculation efficiency.

[0059] According to some embodiments of this application, as shown in Figures 4 and 5, one of the multiple reflux holes 620 corresponds to the vane groove 221 of the cylinder in the vertical direction.

[0060] The cylinder is provided with vane grooves 221, and the pump assembly 200 further comprises vanes, which can slide within the vane grooves 221. By positioning one return port 620 above the vane grooves 221, corresponding to the vane grooves 221, lubricating oil that falls through the return port 620 can directly penetrate into the vane grooves 221, lubricating the frictional pairs between the vanes and the vane grooves 221, improving the lubrication effect, and consequently improving the operational stability of the pump assembly 200.

[0061] In this embodiment, as shown in Figures 4 and 5, one of the multiple recirculation holes 620 corresponds to the vane groove 221 of the upper cylinder 220 in the vertical direction, and the recirculation hole 620 corresponding to the vane groove 221 of the cylinder may be connected to the inner hole of the oil ring 600.

[0062] In other embodiments, the return holes 620 corresponding to the vane grooves 221 of the upper cylinder 220 may be provided at a distance from the inner circumferential surface of the oil ring 600, and are not specifically limited.

[0063] According to some embodiments of this application, as shown in Figures 1 to 4 and Figure 6, the pump assembly 200 further comprises an upper bearing 210 mounted on the upper surface of the cylinder, the oil ring 600 is located above the upper bearing 210, the upper bearing 210 is provided with a communication hole 211, and the communication hole 211 and the recirculation hole 620 are positioned offset in the vertical direction.

[0064] In this embodiment, the upper bearing 210 is provided in an annular shape, which can reduce surface disturbance of the oil reservoir to some extent. In one example, the outer periphery of the upper bearing 210 may be fixedly connected to the inner wall of the case 100, thereby improving the mounting strength of the upper bearing 210, and in this example, the outer diameter of the upper bearing 210 is the same as the maximum outer diameter of the oil ring 600. In another example, the outer periphery of the upper bearing 210 may be provided spaced apart from the inner wall of the case 100, and the upper bearing 210 may be fixedly connected to the cylinder, and in this example, the maximum outer diameter of the oil ring 600 is set to be greater than or equal to the outer diameter of the upper bearing 210.

[0065] By providing a communication hole 211 in the upper bearing 210, the lightweight design of the upper bearing 210 is met, reducing the weight of the upper bearing 210, and facilitating the return of lubricating oil to the oil reservoir through the communication hole 211. However, the installation of the communication hole 211 causes lubricating oil to overflow upward through the communication hole 211 during the operation of the compressor 10, which is detrimental to the stability of the surface of the oil reservoir. By offsetting the return hole 620 and the communication hole 211 in the oil ring 600 in the vertical direction, it is possible to prevent lubricating oil from overflowing onto the upper surface of the oil ring 600 through the communication hole 211, thereby improving the stability of the surface of the oil reservoir.

[0066] Here, the upper bearing 210 may have multiple communication holes 211, and the multiple communication holes 211 may be spaced apart along the circumferential direction of the upper bearing 210, thereby improving the weight reduction effect and satisfying the structural strength design. Exemplarily, as shown in Figure 6, the communication holes 211 may be provided in an elongated shape that extends along the axial direction of the upper bearing 210 in order to increase the flow area.

[0067] In some embodiments, as shown in Figures 4 and 5, at least two pairs of adjacent recirculation holes 620 are provided with different spacings between them, and / or at least two recirculation holes 620 are provided with different dimensions. This results in the multiple recirculation holes 620 being irregularly arranged in the circumferential direction of the oil ring 600, and accordingly, the communication holes 211 of the upper bearing 210 are also irregularly arranged. This improves recirculation efficiency and reduces the probability of vortex formation.

[0068] According to some embodiments of this application, as shown in Figures 1 to 3, the pump assembly 200 may further include a silencer 270 for reducing exhaust noise of the pump assembly 200. The silencer 270 may be mounted on the side of the upper bearing 210 away from the cylinder, that is, the silencer 270 is installed on the side of the upper bearing 210 closer to the motor 300.

[0069] The upper bearing 210 may be provided with an exhaust passage 212, which can communicate with the cylinder, and compressed air generated during the rotation of the crankshaft 260 is discharged through the exhaust passage 212 of the upper bearing 210. The silencer 270 may cover the exhaust passage 212 of the upper bearing 210 so that the exhausted gas enters the silencer 270. The silencer 270 may be provided with an exhaust port to exhaust the compressed gas generated in the pump assembly 200.

[0070] In this embodiment, the exhaust port of the silencer 270 may be provided on the upper surface of the silencer 270 so that the exhausted gas is discharged through the exhaust pipe 400 at the upper end of the case 100. Here, multiple exhaust ports may be provided to improve exhaust efficiency.

[0071] The oil ring 600 may be positioned around the outside of the silencer 270, and the inner surface of the oil ring 600 may be spaced apart from the silencer 270. In this embodiment, the oil ring 600 is positioned around the outside of the silencer 270, and the upper surface of the oil ring 600 is positioned lower than the exhaust port of the silencer 270, thereby preventing the oil ring 600 from affecting the exhaust of the silencer 270 and improving the exhaust effect. By spacing the oil ring 600 and the silencer 270 apart, the assembly of the oil ring 600 is made easier, and the difficulty of assembly is reduced.

[0072] According to some embodiments of this application, as shown in Figure 3, when the thickness of the oil ring 600 in the vertical direction is W1 and the thickness of the main body portion of the upper bearing 210 in the vertical direction is W2, the condition 3mm ≤ W1 ≤ W2 may be satisfied.

[0073] In this embodiment, by limiting the thickness of the oil ring 600, the oil ring 600 has sufficient structural strength, and the production cost does not increase or the space utilization rate decreases due to making the thickness of the oil ring 600 too large.

[0074] In this embodiment, the upper bearing 210 plays a role in supporting the crankshaft 260 and maintaining its stable rotation. Therefore, the upper bearing 210 can serve as the reference point for the main support portion within the compressor 10. The thickness of the main body portion of the upper bearing 210 determines the support strength of the upper bearing 210, and the thickness of the main body portion of the upper bearing 210 can be set as the upper limit of the thickness of the oil ring 600. It should be noted that the thickness of the main body portion of the upper bearing 210 is also the thickness of the outer ring in the radial direction of the upper bearing 210.

[0075] In this embodiment, the value of W2 may be 9 mm, and the range of the value of W1 is [3 mm, 9 mm], specifically, the value of W1 may be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or any other value between 3 mm and 9 mm, and is not limited thereto.

[0076] According to some embodiments of this application, the radial cross-sectional shape of the recirculation hole 620 is circular, elliptical, or polygonal. In this embodiment, the radial cross-sectional shape of the recirculation hole 620 is not limited and may be one of circular, elliptical, or polygonal, where the polygonal shape may be triangular, rectangular, etc. This reduces the probability of vortex formation and improves the recirculation efficiency of the lubricating oil. Exemplarily, as shown in Figures 4 and 5, the recirculation hole 620 may be circular or an elongated hole extending circumferentially around the oil ring 600.

[0077] According to some embodiments of this application, the radial cross-sectional dimensions of the reflux hole 620 may be provided to vary along the axial direction, or the reflux hole 620 may be provided in a columnar shape. In this embodiment, the axial cross-sectional shape of the reflux hole 620 is not limited, and in one example the reflux hole 620 may be a columnar vertical oil hole, and in another example the radial cross-sectional dimensions of the reflux hole 620 may be provided to vary along the axial direction, for example a tapered oil hole.

[0078] According to some embodiments of this application, as shown in Figure 1, the vertical height of the case 100 is H, and it should be explained that when the distance between the upper surface of the oil ring 600 and the upper surface of the case 100 is H1, then 2 / 5 ≤ H1 / H ≤ 7 / 10 is satisfied.

[0079] In this embodiment, H may be the distance from the top surface of the upper case 120 to the bottom surface of the lower case 130, and H1 may be the distance between the top surface of the oil ring 600 and the top surface of the upper case 120. As can be understood, when the compressor 10 is not operating, the lubricating oil in the oil reservoir is static, and when the compressor 10 is operating, the lubricating oil in the oil reservoir is dynamically disturbed by the crankshaft 260, and some of the lubricating oil moves upward, lowering the liquid level of the lubricating oil in the oil reservoir. In order for the oil ring 600 to effectively suppress fluctuations in the surface of the oil reservoir when the compressor 10 is operating, the relationship between H and H1 is defined so that the height position of the oil ring 600 within the case 100 is below the liquid level of the static lubricating oil, and when the compressor 10 is operating, the oil ring 600 is positioned just above the liquid level of the dynamic lubricating oil, thus playing a role in suppressing fluctuations in the liquid level of the oil reservoir.

[0080] In one example, the condition 2 / 5 ≤ H1 / H ≤ 3 / 5 may also be satisfied.

[0081] According to some embodiments of this application, the motor 300 may be provided spaced apart from the inner wall of the case 100. When the compressor 10 is operating, the crankshaft 260 and airflow guide some of the lubricating oil in the oil reservoir into the space above the motor 300. By positioning the motor 300 spaced apart from the inner wall of the case 100, the lubricating oil can be quickly recirculated in the space above the motor 300, and the lubricating oil can be recirculated downward along the gap between the motor 300 and the inner wall of the case 100, thereby improving the recirculation efficiency.

[0082] The embodiments of this application further provide a refrigeration system including a compressor 10 according to any of the embodiments described above. The refrigeration system of this embodiment may be a split-type air conditioner, a central air conditioner, a refrigerator, a freezer, an air energy water heater, a floor heating system, etc.

[0083] Since the refrigeration equipment employs all the technical solutions of the compressor 10 in the above embodiment, it has at least all the beneficial effects of the technical solutions in the above embodiment, and therefore, redundant explanations are omitted here.

[0084] According to the refrigeration equipment of this application, by using the compressor 10 of any of the above embodiments, it is possible to improve the operational stability and refrigeration effect of the refrigeration equipment.

[0085] Embodiments of this application further provide an oil ring 600 applied to a compressor 10, as shown in Figure 5, the outer edge of the oil ring 600 may be provided with a notch 610 recessed toward the axis of the oil ring 600, so that the oil ring 600 can be separated from the inner wall of the case 100 of the compressor 10 at the position of the notch 610, and the outer edge of the oil ring 600 can be connected to the inner wall of the case 100 of the compressor 10 at the position where the notch 610 is not provided.

[0086] According to the embodiment of the present application, by providing a notch 610 on the outer edge of the oil ring 600, the lubricating oil on the inner wall of the case 100 flows downward through the oil ring 600, improving the return efficiency of the lubricating oil in the compressor 10 and contributing to improving the operational stability and performance of the compressor 10.

[0087] Here, the oil ring 600 may be provided with a plurality of notches 610, which are spaced apart along the circumferential direction around the oil ring 600, and the spacing between the plurality of notches 610, the shape and size of each notch 610 may be provided irregularly.

[0088] The oil ring 600 may be further provided with recirculation holes 620 that penetrate in the thickness direction, and there may be multiple recirculation holes 620, which are spaced apart along the circumferential direction around the oil ring 600, and the spacing distance between the multiple recirculation holes 620, the radial cross-sectional shape and cross-sectional dimensions of each recirculation hole 620 may be provided irregularly.

[0089] The terms “first,” “second,” etc., in the specification and claims of this application are for distinguishing similar objects and do not describe a particular order or sequence. To make it clear that the embodiments of this application are carried out in any other order illustrated or described herein, the content used in this manner is interchangeable where appropriate, and the objects distinguished by “first,” “second,” etc., are usually of the same kind and do not limit the number of objects; for example, the first object may be one or more. Also, “and / or” in the specification and claims indicates at least one of the connected objects, and the symbol “ / ” usually indicates that the objects connected before and after are in an “or” relationship.

[0090] In the description of this application, directions or positional relationships indicated by terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are directions or positional relationships shown based on the drawings and are solely for the purpose of facilitating and simplifying the description of this application. They do not indicate or imply that the referred devices or elements have a particular orientation, are configured in a particular orientation, or must be operated in a particular orientation, and therefore should not be understood as limiting the present invention.

[0091] In the description of this application, “first feature” and “second feature” may include one or more such features.

[0092] In the description of this application, "multiple" means two or more.

[0093] In the description of this application, the fact that the first feature is "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0094] In the description of this application, the presence of the first feature "above," "above," and "upper side" of the second feature includes the presence of the first feature directly above and diagonally above the second feature, or simply indicates that the height of the first feature is greater than the height of the second feature.

[0095] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described with reference to that embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in an appropriate manner in any one or more embodiments or examples.

[0096] While examples and descriptions of embodiments of this application have been provided, various modifications, alterations, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application, as will be understood by those skilled in the art. The scope of the present invention is limited by the claims and their equivalents. [Explanation of Symbols]

[0097] 10... Compressor, 100... Case, 110... Main case, 120... Upper case, 130... Lower case, 140... Mounting cavity, 150... Base, 200... Pump assembly, 210... Upper bearing, 211... Communication hole, 212... Exhaust passage, 220... Upper cylinder, 221... Vane groove, 230... Partition plate, 240... Lower cylinder, 250... Lower bearing, 260... Crankshaft, 261... Main shaft section, 262... Eccentric section, 270... Silencer, 280... Vane, 300... Motor, 310... Stator, 320... Rotor, 400... Exhaust pipe, 500... Accumulator, 510... Intake pipe, 600... Oil ring, 610... Notch, 620... Refrigeration hole.

Claims

1. The case and, A motor mounted inside the aforementioned case, A pump assembly comprising a cylinder mounted inside the case and located below the motor, The system includes an oil ring mounted within the case and positioned between the cylinder and the motor, with at least a portion of its outer edge spaced apart from the inner wall of the case. Compressor.

2. The compressor according to claim 1, wherein the oil ring is connected to the inner wall of the case.

3. The outer edge of the oil ring is provided with a notch that is recessed toward the axis of the oil ring, the oil ring is separated from the inner wall of the case at the position of the notch, and the outer edge of the oil ring is connected to the inner wall of the case at the position where the notch is not provided. The compressor according to claim 1 or 2.

4. Multiple notches are provided, and these multiple notches are spaced apart along the circumferential direction of the oil ring. The compressor according to claim 3.

5. The distance between at least two sets of adjacent notches is set to be different, and / or At least two of the aforementioned notches are provided in different shapes. The compressor according to claim 4.

6. The outer edge of the notch is one of the following shapes: arc-shaped, straight, bent, or wavy. A compressor according to any one of claims 3 to 5.

7. The oil ring is provided with a recirculation hole that penetrates in the vertical direction. A compressor according to any one of claims 1 to 6.

8. The oil ring is provided with a plurality of recirculation holes, and the plurality of recirculation holes are distributed along the circumferential direction of the oil ring. The compressor according to claim 7.

9. One of the multiple return holes corresponds to the vane groove of the cylinder in the vertical direction. The compressor according to claim 8.

10. The aforementioned pump assembly is The cylinder further comprises an upper bearing mounted on the upper surface, The oil ring is located above the upper bearing, The upper bearing is provided with a communication hole, and the communication hole and the recirculation hole are positioned offset from each other in the vertical direction. A compressor according to any one of claims 7 to 9.

11. The aforementioned pump assembly is The upper bearing is further equipped with a silencer attached to the side away from the cylinder, and the silencer is provided with an exhaust port. The oil ring is provided around the outside of the silencer, and the inner surface of the oil ring is provided at a distance from the silencer. The compressor according to claim 10.

12. When the vertical thickness of the main body portion of the oil ring is W1 and the vertical thickness of the upper bearing is W2, Satisfying 3 mm ≤ W1 ≤ W2, The compressor according to claim 10 or 11.

13. The radial cross-sectional shape of the reflux hole is circular, elliptical, or polygonal. A compressor according to any one of claims 7 to 12.

14. The radial cross-sectional dimensions of the aforementioned reflux holes are provided to vary along the axial direction, or The aforementioned return holes are provided in a columnar shape. A compressor according to any one of claims 7 to 13.

15. When the vertical height of the case is H, and the distance between the upper surface of the oil ring and the upper surface of the case is H1, Satisfying 2 / 5 ≤ H1 / H ≤ 7 / 10, A compressor according to any one of claims 1 to 14.

16. The motor is provided spaced apart from the inner wall of the case. A compressor according to any one of claims 1 to 15.

17. A compressor according to any one of claims 1 to 16, Refrigeration equipment.

18. An oil ring applied to a compressor, The outer edge of the oil ring is provided with a notch that is recessed toward the axis of the oil ring. The oil ring is spaced apart from the inner wall of the compressor case at the position of the notch, and the outer edge of the oil ring is connected to the inner wall of the compressor case at the position where the notch is not provided. Oil ring.

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