Compressor and refrigeration apparatus

Abstract

The application discloses a compressor and a refrigeration device, the compressor comprising a compressor body, a liquid accumulator, a return oil pipe, a lower bearing and an oil cover, the compressor body comprising a shell and a cylinder, the cylinder being provided with a first return oil passage, the cylinder and the upper part of the shell being surrounded to form a high-pressure cavity, the liquid accumulator being integrally arranged below the shell, the return oil pipe being located in the shell, the liquid accumulator being provided with a liquid storage cavity, the liquid storage cavity being communicated with the cylinder through the return oil pipe, the lower bearing being connected to the cylinder, the lower bearing being provided with a second return oil passage, the oil cover being installed below the lower bearing, the oil cover being provided with a oil storage cavity, the oil storage cavity being communicated with the high-pressure cavity through the first return oil passage and the second return oil passage; the technical scheme of the application reduces the radial dimension of the compressor.

Description

Technical Field

[0001] This invention relates to the technical field of compressors, and particularly to a compressor and refrigeration equipment. Background Technology

[0002] In the prior art, the liquid receiver is located outside the casing of the compressor body, which makes the radial dimension of the compressor larger, requiring a larger space to house the compressor, thus hindering the miniaturization of the compressor. Summary of the Invention

[0003] The main objective of this invention is to provide a compressor designed to reduce the radial dimension of the compressor.

[0004] To achieve the above objectives, the compressor proposed in this invention comprises:

[0005] The compressor body includes a housing and a cylinder. The cylinder is provided with a first oil return channel, and a high-pressure chamber is formed by the upper part of the cylinder and the housing.

[0006] The liquid reservoir and the return gas and oil pipe are integrally disposed below the housing, and the return gas and oil pipe is located inside the housing. The liquid reservoir is provided with a liquid storage chamber, and the liquid storage chamber is connected to the cylinder through the return gas and oil pipe.

[0007] The lower bearing is connected to the cylinder and has a second oil return channel; and

[0008] An oil cap is connected to the lower bearing and has an oil storage chamber. The oil storage chamber is connected to the high-pressure chamber through the first oil return channel and the second oil return channel.

[0009] Optionally, the compressor further includes a connector, the oil cap is provided with a flange, and the flange, the lower bearing, and the cylinder are each provided with at least one mounting hole. The oil cap, the lower bearing, and the cylinder are fixedly connected through the connector and the mounting hole.

[0010] Optionally, the connecting member is a rivet or a screw, and the flange, the lower bearing, and the mounting holes on the cylinder are arranged opposite to each other. The rivet or the screw passes through a plurality of mounting holes in sequence so that the oil cap, the lower bearing, and the cylinder are fixedly connected to each other.

[0011] Optionally, the connector includes a first rivet or a first screw and a second rivet or a second screw, the mounting hole includes a first mounting hole and a second mounting hole, the lower bearing and the cylinder are each provided with at least one first mounting hole, the flange and the lower bearing are each provided with at least one second mounting hole, the cylinder and the lower bearing are fixedly connected by the cooperation of the first rivet or the first screw and the corresponding first mounting hole, and the oil cap and the lower bearing are fixedly connected by the cooperation of the second rivet or the second screw and the corresponding second mounting hole.

[0012] Optionally, the compressor body further includes a crankshaft passing through the cylinder, the crankshaft having an oil inlet channel, and the oil storage chamber communicating with the cylinder through the oil inlet channel.

[0013] Optionally, the crankshaft includes a main shaft portion, an eccentric portion, and a secondary shaft portion arranged sequentially. The outer wall surface of the main shaft portion, the outer wall surface of the eccentric portion, and the outer wall surface of the secondary shaft portion are each provided with at least one oil inlet hole, and the oil inlet hole is connected to the oil inlet channel.

[0014] Optionally, multiple second oil return channels are provided, and the multiple second oil return channels are arranged circumferentially along the lower bearing.

[0015] Optionally, the cross-section of the second oil return channel is T-shaped, or the cross-section of the second oil return channel is L-shaped, or the cross-section of the second oil return channel is straight.

[0016] Optionally, the second oil return channel includes a first oil passage and a second oil passage, the first oil passage being located close to the cylinder and the second oil passage being located away from the cylinder, and the width of the first oil passage being greater than or equal to the width of the second oil passage.

[0017] Optionally, the total cross-sectional area of ​​the plurality of second oil passages is S1, the total cross-sectional area of ​​the oil inlet is S2, the radius of the main shaft is r1, the radius of the secondary shaft is r2, r0 = max{r1,r2}, and S1 ≥ 500r0S2.

[0018] Optionally, the compressor further includes an oil inlet vane, which is installed in the oil inlet channel and located near the oil cap.

[0019] Optionally, the compressor further includes an oil pump housing, which is mounted on the end of the secondary shaft opposite to the eccentric portion, and the oil pump housing is located within the oil storage chamber.

[0020] Optionally, the secondary shaft extends toward the oil reservoir so that it extends into the oil reservoir.

[0021] The present invention also proposes a refrigeration device, including the compressor described above.

[0022] In this invention, the liquid reservoir is integrally located below the housing, and the return gas and oil pipes are located inside the housing, connecting the liquid reservoir chamber and the cylinder. This allows the liquid reservoir to be fully integrated into the housing, thereby reducing the radial dimension of the compressor and facilitating its miniaturization. Furthermore, the lower bearing is connected to the cylinder, and the cylinder and the upper part of the housing enclose a high-pressure chamber. The cylinder has a first oil return channel, and the lower bearing has a second oil return channel. The oil cap is located below the lower bearing, and the oil cap contains an oil reservoir chamber. The oil reservoir chamber is connected to the high-pressure chamber sequentially through the second and first oil return channels, allowing the lubricating oil returning from the high-pressure chamber to flow smoothly into the oil reservoir chamber through the first and second oil return channels. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of an embodiment of the compressor of the present invention;

[0025] Figure 2 This is a schematic diagram of the lower bearing from one perspective in an embodiment of the compressor of the present invention;

[0026] Figure 3 This is a schematic diagram of the lower bearing from another perspective in one embodiment of the compressor of the present invention;

[0027] Figure 4 This is a cross-sectional view of the lower bearing in one embodiment of the compressor of the present invention;

[0028] Figure 5 This is a cross-sectional view of the lower bearing from another perspective in one embodiment of the compressor of the present invention;

[0029] Figure 6 This is a cross-sectional view of the lower bearing in another embodiment of the compressor of the present invention;

[0030] Figure 7 This is a cross-sectional view of a cylinder in one embodiment of the compressor of the present invention;

[0031] Figure 8 This is a schematic diagram of the crankshaft structure in one embodiment of the compressor of the present invention;

[0032] Figure 9This is a partial schematic diagram of the crankshaft in one embodiment of the compressor of the present invention;

[0033] Figure 10 This is a cross-sectional view of the crankshaft in one embodiment of the compressor of the present invention;

[0034] Figure 11 This is a partial schematic diagram of an embodiment of the compressor of the present invention;

[0035] Figure 12 This is a schematic diagram of the structure of the compressor of the present invention when an oil pump housing is installed;

[0036] Figure 13 This is a schematic diagram of the structure of the compressor of the present invention when the auxiliary shaft extends downward;

[0037] Figure 14 This is an enlarged view of the suction pipe in one embodiment of the compressor of the present invention.

[0038] Explanation of icon numbers:

[0039]

[0040]

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] Reference Figures 1 to 6 In this embodiment, the compressor includes a housing 11, a cylinder 12, a liquid receiver, and a return gas and oil pipe 33. The liquid receiver is integrally disposed below the housing 11, and the return gas and oil pipe 33 is located inside the housing 11. The liquid receiver has a liquid storage chamber 31, which is connected to the cylinder 12 through the return gas and oil pipe 33. An oil cap 41 is connected to the lower bearing 21 and located inside the liquid storage chamber 31. The cylinder 12 and the lower bearing 21 are also provided with a first return gas channel 121 and a second return gas channel 211, respectively. The liquid storage chamber 31 is connected to the cylinder 12 through the first return gas channel 121 and the second return gas channel 211, so that the refrigerant in the liquid storage chamber 31 can smoothly enter the cylinder 12 for compression.

[0047] Understandably, by placing the liquid receiver on the lower side of the compressor body, thus integrating it into the compressor's axial direction, the radial dimension of the compressor is greatly shortened, making the compressor structure more compact and facilitating compressor miniaturization. Integrating the liquid receiver with the compressor body means that any vibration in either the liquid receiver or the compressor body will cause the other object to vibrate, thereby reducing the compressor's vibration amplitude and noise, and also contributing to compressor miniaturization. Furthermore, by integrating the liquid receiver with the compressor body, only the exposed outer casing needs rust prevention treatment, reducing the area requiring rust prevention and lowering the production costs associated with rust prevention operations.

[0048] Furthermore, in this embodiment, the compressor also includes a lower bearing 21 and an oil cap 41. The cylinder 12 is provided with a first oil return channel 122. The upper part of the cylinder 12 and the housing 11 encloses a high-pressure chamber 17. The lower bearing 21 is connected to the cylinder 12. The lower bearing 21 is provided with a second oil return channel 212. The oil cap 41 is connected to the lower part of the lower bearing 21. The oil cap 41 is provided with an oil storage chamber 42. The oil storage chamber 42 is connected to the high-pressure chamber 17 through the first oil return channel 122 and the second oil return channel 212.

[0049] Meanwhile, since the oil cap 41 is also installed inside the liquid storage chamber 31, the return gas and oil pipe 33 needs to be installed in the gap between the wall of the liquid storage chamber 31 and the oil cap 41. This results in the return gas and oil pipe 33 being far from the first return gas passage 121 on the cylinder 12. If the return gas and oil pipe 33 were directly connected to the first return gas passage 121, the first return gas passage 121 would need to have a large bending angle. If the bending angle of the first return gas passage 121 is too large, it will cause the refrigerant to generate a lot of noise when flowing in the first return gas passage 121, thereby reducing the user experience. Therefore, the return gas and oil pipe 33 and the first return gas passage 121 are far apart. The transition between channels 121 is achieved through the lower bearing 21. By opening a second return air channel 211 inclined on the lower bearing 21, the bending angle of the first return air channel 121 is reduced, thereby reducing the noise generated when the refrigerant flows. Therefore, the lower bearing 21 needs to be set with a larger diameter to connect with the return air and oil pipe 33. If so, the lower bearing 21 will block the passage of the first return oil channel 122 on the cylinder 12 into the oil storage chamber 42. Therefore, this application needs to open a second return oil channel 212 on the lower bearing 21 so that the lubricating oil flowing back in the first return oil channel 122 on the cylinder 12 can fall smoothly into the oil storage chamber 42.

[0050] Therefore, in the technical solution of the present invention, a first oil return channel 122 is provided on the cylinder 12, a second oil return channel 212 is provided on the lower bearing 21, an oil cap 41 is located below the lower bearing 21, and an oil storage chamber 42 is provided inside the oil cap 41. The oil storage chamber 42 is connected to the high pressure chamber 17 in sequence through the second oil return channel 212 and the first oil return channel 122, so that the lubricating oil flowing back in the high pressure chamber 17 can flow smoothly into the oil storage chamber 42 in sequence through the first oil return channel 122 and the second oil return channel 212.

[0051] In this embodiment, the compressor further includes a connector. The oil cap 41 is provided with a flange. The flange, the lower bearing 21, and the cylinder 12 are each provided with at least one mounting hole 213. The oil cap 41, the lower bearing 21, and the cylinder 12 are fixedly connected by the connector and the mounting hole 213.

[0052] In one embodiment, the connecting member is a rivet or a screw. The flange, the lower bearing 21, and the mounting holes 213 on the cylinder 12 are arranged opposite to each other. The rivet or the screw passes through multiple mounting holes 213 in sequence to fix the oil cap 41, the lower bearing 21, and the cylinder 12 to each other. That is, a screw or a rivet passes through the flange of the oil cap 41, the lower bearing 21, and the three mounting holes 213 on the cylinder 12 at the same time to fix the three to each other. The number of screws or rivets is not limited. There can be only one or multiple screws.

[0053] In another embodiment, the connector includes a first rivet or a first screw and a second rivet or a second screw. The mounting hole 213 includes a first mounting hole 213 and a second mounting hole 213. The lower bearing 21 and the cylinder 12 are each provided with at least one first mounting hole 213. The flange and the lower bearing 21 are each provided with at least one second mounting hole 213. The cylinder 12 and the lower bearing 21 are fixedly connected by the cooperation of the first rivet or the first screw and the corresponding first mounting hole 213. The oil cap 41 and the lower bearing 21 are fixedly connected by the cooperation of the second rivet or the second screw and the corresponding second mounting hole 213.

[0054] Reference Figures 1 to 8Specifically, the compressor body also includes a crankshaft 14, which passes through the cylinder 12. The crankshaft 14 is provided with an oil inlet channel 145, and the oil storage chamber 42 is connected to the cylinder 12 through the oil inlet channel 145. Further, the crankshaft 14 includes a main shaft portion 141, an eccentric portion 142, and a secondary shaft portion 143 arranged sequentially. The outer wall surfaces of the main shaft portion 141, the eccentric portion 142, and the secondary shaft portion 143 are each provided with at least one... An oil inlet hole 144 is connected to the oil inlet channel 145, so that the lubricating oil in the oil storage chamber 42 enters the corresponding positions of the main shaft 141, eccentric part 142 and auxiliary shaft 143 through the oil inlet channel 145 and the oil inlet hole 144 respectively. This ensures that the three contact positions of the main shaft 141, eccentric part 142 and auxiliary shaft 143 have sufficient lubricating oil, thereby reducing friction, improving the service life of the compressor, and improving the energy consumption and reliability of the compressor.

[0055] Reference Figure 11 , Figure 12 and Figure 13 The compressor also includes an oil inlet vane 15, which is installed in the oil inlet channel 145 and located near the oil cap 41. When the crankshaft 14 rotates, it will drive the oil inlet vane to rotate together, thereby guiding the lubricating oil in the oil storage chamber 42 to flow through the oil inlet channel 145 of the crankshaft 14 into the corresponding areas such as the main shaft 141, the eccentric part 142, and the auxiliary shaft 143. The principle of lubricating oil entering the crankshaft 14 from the oil storage chamber 42 is that centrifugal force is generated when the crankshaft 14 rotates, and the lubricating oil will be sucked into the oil inlet channel 145 under the action of centrifugal force.

[0056] Reference Figure 12 In one embodiment, the compressor further includes an oil pump housing 16, which is installed on one end of the secondary shaft portion 143 away from the eccentric portion 142. The oil pump housing 16 is located in the oil storage chamber 42, and the oil pump housing 16 makes it easier for the lubricating oil in the oil storage chamber 42 to enter the oil inlet channel 145 through the oil pump housing 16.

[0057] Reference Figure 13 In another embodiment, the secondary shaft portion 143 extends toward the oil reservoir 42 so that the secondary shaft portion 143 extends into the oil reservoir 42. By extending the secondary shaft portion 143, the lubricating oil in the oil reservoir 42 can more easily enter the oil inlet channel 145.

[0058] Reference Figure 8 , Figure 9 and Figure 10It should be noted that the crankshaft 14 is hollow, and although it runs through the entire crankshaft 14 and extends into the motor 13 from the top, the motor 13 does not require lubrication. The motor 13 consists of a stator and a rotor. The crankshaft 14 and the rotor are fixed together, and there is a gap between the rotor and the stator, so they do not contact each other and there is no friction, so no lubricating oil is needed. Secondly, the lubricating oil generally does not flow into the motor 13 through the top of the crankshaft 14, because the lubricating oil is carried up by the centrifugal force of the crankshaft 14 rotation and the agitation of the oiling blades. Depending on the position of the oiling blades, the lubricating oil cannot reach that high.

[0059] In this embodiment, multiple second oil return channels 212 are provided, and the multiple second oil return channels 212 are arranged along the circumference of the lower bearing 21. By providing multiple channels along the circumference of the lower bearing 21, the lubricating oil flowing back into the cylinder 12 can flow back through the corresponding oil return channels, and can flow back into the oil storage chamber 42 in a timely and sufficient manner, thereby improving the oil return efficiency.

[0060] In this embodiment, the cross-section of the second oil return channel 212 is T-shaped, or L-shaped, or straight. Of course, in other embodiments, it can also be arc-shaped, stepped, or other irregular shapes.

[0061] Specifically, the second oil return channel 212 includes a first oil passage 2121 and a second oil passage 2122. The first oil passage 2121 is located close to the cylinder 12, and the second oil passage 2122 is located away from the cylinder 12. The width of the first oil passage 2121 is greater than or equal to the width of the second oil passage 2122. By making the first oil passage 2121 larger than the second oil passage 2122, the lubricating oil returning from the cylinder 12 can fall into the first oil passage 2121 as quickly as possible, and then flow into the oil storage chamber through the second oil passage 2122. Within 42, the transition surface between the first oil passage 2121 and the second oil passage 2122 can be a plane or an inclined plane. If it is an inclined plane, it should be inclined downward from the outer wall of the first oil passage 2121 towards the center, so that the lubricating oil in the first oil passage 2121 can flow into the second oil passage 2122. Of course, in other embodiments, it can also be arranged in an arc shape, that is, the opening of the second oil return channel 212 towards the cylinder 12 is larger than the opening of the second oil return channel 212 towards the oil storage chamber 42, and the two openings are arc-shaped transitions.

[0062] Preferably, the total cross-sectional area of ​​the plurality of second oil return channels 212 is S1, the total cross-sectional area of ​​the oil inlet holes 144 is S2, the radius of the main shaft portion 141 is r1, the radius of the secondary shaft portion 143 is r2, r0 = max{r1, r2}, S1 ≥ 500r0S2, and the minimum value of S1 is 229.8 mm. 2 In one embodiment of this application, S1 = 432mm 2 Of course, in other embodiments, S1 can also be 430, 320, etc.

[0063] S1≥500r0S2 indicates that the oil return efficiency is greater than the oil extraction efficiency. Understandably, the oil return efficiency should be greater than the oil extraction efficiency. This ensures that the lubricating oil injected into the cylinder 12 from the oil reservoir 42 can return to the oil reservoir 42 promptly after one lubrication cycle, providing sufficient lubricating oil for the next lubrication cycle. If the oil return efficiency is less than the oil extraction efficiency, excessive lubricating oil will clog the lower part of the cylinder 12, preventing it from receiving sufficient lubricating oil for the next lubrication cycle. This also results in insufficient lubrication in the upper part of the cylinder 12, while the lower part receives excessive lubricating oil, leading to insufficient lubrication in certain areas of the cylinder 12 and reducing its service life. Furthermore, excessive lubricating oil in the cylinder 12 will cause more lubricating oil to mix into the high-pressure refrigerant during compression, thus reducing the refrigerant's cooling and heating efficiency.

[0064] It should be noted that after the lubricating oil is lubricated in the corresponding parts through the oil inlet channel 145 and the oil inlet hole 144, most of the lubricating oil liquefies after contacting the high-temperature motor 13 coil and rotor, and then flows back to the oil storage chamber 42 through the first oil return channel 122 and the second oil return channel 212, and repeats the lubrication process for the next time. However, a small amount of lubricating oil will mix with the refrigerant and enter the condenser through the exhaust pipe in the upper space of the motor 13 along with the high-pressure refrigerant, thereby participating in heat exchange. Finally, the refrigerant mixed with the high-pressure refrigerant will enter the liquid storage chamber 31.

[0065] Understandably, long-term reciprocating operation will cause the lubricating oil in the receiver to accumulate more and more. This will not only increase the lubricating oil content in the refrigerant and affect the refrigerant's cooling and heating efficiency, but also reduce the lubricating oil in the oil sump. Over time, this will lead to insufficient lubricating oil supply, resulting in insufficient lubrication inside cylinder 12, which in turn reduces the working efficiency of cylinder 12, reduces the compression efficiency of the compressor, and also reduces the service life of cylinder 12.

[0066] It should be noted that the term "gaseous refrigerant" in this invention should be interpreted broadly. For example, it can be understood as a gaseous refrigerant containing very little oil, or it can be a relatively pure gaseous refrigerant. Similarly, the term "oil" in this invention should also be interpreted broadly. For example, it can be understood as a relatively pure lubricating oil, or it can be interpreted as lubricating oil containing a very small amount of gaseous refrigerant dissolved in it.

[0067] Therefore, to solve the above problems, in this embodiment, the compressor further includes a return gas and oil pipe 33. The return gas and oil pipe 33 is installed between the side wall of the liquid storage chamber 31 and the side wall of the oil cap 41. One end of the return gas and oil pipe 33 is connected to the liquid storage chamber 31, and the other end of the return gas and oil pipe 33 is connected to both the first return gas channel 121 and the second return gas channel 211. Through the return gas and oil pipe 33, the lubricating oil in the liquid storage chamber 31 can be returned to the cylinder 12. This is because when the compressor is running, the pressure near the air inlet of the cylinder 12 is very low, while the pressure in the liquid storage chamber is higher than that at the air inlet of the cylinder 12. The refrigerant flows near the air inlet of cylinder 12. Through the pressure difference and pulsation, the oil at the bottom of the receiver is pumped into the cylinder 12 through the return air and oil pipe 33, thereby lubricating the inside of cylinder 12. Most of the lubricating oil liquefies after contacting the high-temperature motor coil and rotor, and then flows back to the oil storage chamber 42 through the first return oil channel 122 and the second return oil channel 212. This ensures that the oil storage chamber 42 always has enough lubricating oil to lubricate the inside of cylinder 12, thereby improving the working efficiency of cylinder 12, which in turn improves the working efficiency of the compressor and also extends the service life of the compressor.

[0068] The return gas and oil pipe 33 can not only return oil, but also allow the refrigerant in the liquid storage chamber 31 to flow into the cylinder 12 for compression. Furthermore, the return gas and oil pipe 33 can be a single pipe, which can return both gas and oil. Alternatively, the return gas and oil pipe 33 can be divided into two pipes: a return gas pipe and a return oil pipe. Since the lubricating oil is liquid, most of it settles at the bottom of the liquid storage chamber. The return oil pipe in the return gas and oil pipe 33 extends into the bottom of the liquid storage chamber, thus allowing the return oil pipe to return oil. The return gas pipe only needs to not extend into the lubricating oil in the liquid storage chamber 31.

[0069] The second return gas passage 211 is inclined inward from bottom to top. Understandably, the oil cap 41 is installed in the middle of the liquid storage chamber 31. In order to reduce the size of the compressor and make the compressor miniaturized, the gap between the side wall of the liquid storage chamber 31 and the side wall of the oil cap 41 is small. At the same time, the cylinder 12 is installed in the middle of the bearing. Therefore, in order to facilitate the connection between the liquid storage chamber 31 and the cylinder 12, the second return gas passage 211 is inclined. This makes it easier to reduce the size of the compressor, and also makes the angle between the cylinder 12 and the bearing smaller, reducing the noise generated during the transmission of refrigerant in the first return gas passage 121 and the second return gas passage 211.

[0070] Of course, in other embodiments, a bend-shaped oil return channel can be provided in the second oil return channel 212. However, the angle of the bend should not be too large. For example, it should not be a right angle as much as possible. The bend should be set as arc-shaped as possible. This is because if the bend is a right angle when the refrigerant flows from the liquid storage chamber 31 into the cylinder 12, it will cause turbulence when the refrigerant flows, which will generate noise and reduce the user's experience.

[0071] Furthermore, the inner wall of the first return air channel 121 is arc-shaped. By arc-shaped inner wall of the first return air channel 121, the possibility of turbulence generated when the refrigerant flows from the second return air channel 211 into the first return air channel 121 is reduced, the noise generated in the first return air channel 121 is reduced, and the user experience is further improved.

[0072] Reference Figure 14 In one embodiment, the compressor further includes a suction pipe 32. The housing 1111 is provided with a suction hole. The suction pipe 32 is sealed to the suction hole. The suction pipe 32 is connected to the liquid storage chamber 31 through the suction hole. Through the suction pipe 32, the refrigerant in the evaporator flows into the liquid storage chamber 31, so that the high-pressure refrigerant discharged into the condenser can flow back into the liquid storage chamber 31 for further compression, thereby realizing the cooling and heating process.

[0073] Furthermore, during the operation of the compressor, the gaseous refrigerant entering the compressor may contain impurities such as dust and small particles. If impurities enter the compressor, it will not only affect the efficiency of gas compression, but also reduce the efficiency of the compressor. Therefore, in this embodiment, a filter is installed at the suction pipe 32. By setting the filter, the gaseous refrigerant can be filtered before entering the compressor body, reducing the content of impurities in the gaseous refrigerant, improving the compression efficiency of the compressor body, reducing the impact of impurities on the compressor body, and thus improving the life of the compressor body.

[0074] This invention also proposes a refrigeration device, which can be categorized into compression refrigeration devices, absorption refrigeration devices, vapor jet refrigeration devices, heat pump refrigeration devices, and electric heating refrigeration devices. The refrigeration device mainly consists of a compressor, expansion valve, evaporator, condenser, accessories, and piping. Examples include refrigerators and air conditioners. The refrigeration device in this application includes the aforementioned compressor and employs all the technical solutions of the above embodiments. Therefore, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0075] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A compressor, characterized in that, include: The compressor body includes a housing and a cylinder. The cylinder is provided with a first oil return channel, and a high-pressure chamber is formed by the upper part of the cylinder and the housing. The liquid reservoir and the return gas and oil pipe are integrally disposed below the housing, and the return gas and oil pipe is located inside the housing. The liquid reservoir is provided with a liquid storage chamber, and the liquid storage chamber is connected to the cylinder through the return gas and oil pipe. The lower bearing is connected to the cylinder and has a second oil return channel; and An oil cap is connected to the lower bearing and has an oil storage chamber. The oil storage chamber is connected to the high-pressure chamber through the first oil return channel and the second oil return channel. The second oil return channel includes a first oil passage and a second oil passage. The first oil passage is located close to the cylinder, and the second oil passage is located away from the cylinder. The width of the first oil passage is greater than or equal to the width of the second oil passage.

2. The compressor as described in claim 1, characterized in that, The compressor also includes a connector, the oil cover is provided with a flange, and the flange, the lower bearing and the cylinder are each provided with at least one mounting hole. The oil cover, the lower bearing and the cylinder are fixedly connected by the connector and the mounting hole.

3. The compressor as described in claim 2, characterized in that, The connecting component is a rivet or a screw. The flange, the lower bearing, and the mounting holes on the cylinder are arranged opposite to each other. The rivet or the screw passes through multiple mounting holes in sequence to fix the oil cap, the lower bearing, and the cylinder together.

4. The compressor as described in claim 2, characterized in that, The connector includes a first rivet or a first screw and a second rivet or a second screw. The mounting hole includes a first mounting hole and a second mounting hole. The lower bearing and the cylinder are each provided with at least one first mounting hole. The flange and the lower bearing are each provided with at least one second mounting hole. The cylinder and the lower bearing are fixedly connected by the cooperation of the first rivet or the first screw and the corresponding first mounting hole. The oil cap and the lower bearing are fixedly connected by the cooperation of the second rivet or the second screw and the corresponding second mounting hole.

5. The compressor as described in claim 1, characterized in that, The compressor body also includes a crankshaft passing through the cylinder, the crankshaft having an oil inlet channel, and the oil storage chamber being connected to the cylinder through the oil inlet channel.

6. The compressor as described in claim 5, characterized in that, The crankshaft includes a main shaft section, an eccentric section, and a secondary shaft section arranged in sequence. The outer wall surface of the main shaft section, the outer wall surface of the eccentric section, and the outer wall surface of the secondary shaft section are each provided with an oil inlet hole, which is connected to the oil inlet channel.

7. The compressor as described in claim 6, characterized in that, The second oil return channel is provided in multiple ways, and the multiple second oil return channels are arranged along the circumference of the lower bearing.

8. The compressor as claimed in claim 7, characterized in that, The cross-section of the second oil return channel is T-shaped, or L-shaped, or straight.

9. The compressor as claimed in claim 6, characterized in that, The compressor also includes an oil inlet vane, which is installed in the oil inlet channel and located near the oil cap.

10. The compressor as claimed in claim 9, characterized in that, The compressor also includes an oil pump housing, which is installed at the end of the secondary shaft opposite to the eccentric portion and is located within the oil storage chamber.

11. The compressor as claimed in claim 9, characterized in that, The secondary shaft extends toward the oil reservoir so that it extends into the oil reservoir.

12. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 1 to 11.

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