Oil return structure of compressor, compressor and air conditioner

Abstract

The present invention provides an oil return structure for a compressor, a compressor, and an air conditioner. The oil return structure for the compressor includes: a stator, an exhaust cover 1, and an exhaust cover 2. The end surface of the exhaust cover 1 facing the stator forms a first cavity by a recessed manner. The exhaust cover 2 is arranged in the first cavity. The exhaust cover 2 includes a main body and a protrusion. The main body is connected to the stator to form an exhaust area between the two. The protrusion is arranged on the main body. The interior of the protrusion is also a hollow second cavity, forming an oil separation cavity. The oil separation cavity can be connected to the exhaust area. The exterior of the main body and the protrusion together form an oil storage cavity with the exhaust cover 1. The oil storage cavity is connected to the oil separation cavity. The present invention increases the oil storage volume of the lubricating oil without increasing the weight and size of the compressor through effective design on the stator and the cover.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an oil return structure of a compressor, a compressor and an air conditioner. Background Art

[0002] Automotive aluminum alloy scroll compressors lack a stable internal oil reservoir to supply mechanical oil to lubricated parts via the compressor's internal oil pumping system. Instead, the compressor's intake refrigerant carries the lubricant, and the exhaust gas centrifuge separates the refrigerant and lubricant before throttling the oil back to the compressor. Therefore, the efficiency of the centrifugal separation process is crucial to compressor performance and reliability. Existing centrifugal separation structures are highly mature, and simple centrifugal separation systems offer high separation efficiencies, fully capable of separating most lubricant oil from refrigerant. However, there are major problems with the existing technical solutions for returning the separated lubricating oil to the compressor, which are mainly concentrated in: 1. The return oil storage structure is set up unreasonably, and the oil storage structure is easily affected by the centrifugal separation structure, resulting in a small amount of oil stored in the actual oil storage structure or the separated lubricating oil is carried away by the refrigerant; 2. The return oil structure directly adopts a throttling structure to connect the high-pressure to the low-pressure or medium-pressure lubrication part. Due to the large throttling pressure difference, the throttling is insufficient when there is a large pressure difference in actual operation, resulting in high-pressure gas entering the low-pressure or medium-pressure part, affecting the performance of the compressor; under small pressure difference conditions, the return volume is too small, and the lubricating oil separated by the centrifugal separation structure cannot be returned to the compressor in time. The excess lubricating oil in the separation structure is carried away by the refrigerant again, resulting in poor heat exchange effect of the system.

[0003] Patent No. US6511530B2 discloses a structure for separating and storing oil in exhaust gas of a compressor, such as Figure 1 As shown, between the back of the compressor static scroll 2 and the exhaust cover 4, an exhaust chamber 13a, an oil-gas separation chamber 11 and a lubricating oil storage chamber 15 are provided. The oil storage chamber 15 returns to the internal suction chamber of the compressor through the return oil channel 2a, thereby realizing the circulation of the lubricating oil inside the compressor. However, there are the following problems: in order not to affect the oil separation efficiency of the separation chamber 11, the oil storage chamber 15 must be arranged in the gravity direction below the oil separation chamber and the highest liquid level in the oil storage chamber must be lower than the oil outlet 14 of the oil separation chamber, otherwise the lubricating oil enters the separation chamber and affects the oil separation effect. Therefore, the technical patent number of this type of oil storage chamber is CN107575383A. The same problem is that the oil storage volume is small, and excess lubricating oil will still be carried into the refrigeration system by the refrigerant. Otherwise, in order to increase the volume of the oil storage chamber, it is necessary to increase the axial height of the oil storage chamber, which will bring about problems such as large compressor size, heavy weight and high production cost. At the same time, the pressure in this type of oil storage chamber is exhaust high pressure. Affected by the exhaust fluctuation of the pump body, the exhaust pressure fluctuates greatly, which makes it difficult to stabilize the liquid level in the oil storage chamber and also fluctuates greatly with the exhaust.

[0004] Patent No. CN107605726A discloses another oil return structure, such as Figure 2 As shown, the oil return passage 7 in the compressor exhaust cover 4 connects the stator plate 3 and the bracket 1. A throttling channel is provided in the bracket 1, so that the lubricating oil in the oil return passage 7 is introduced into the lubrication cavity 11 in the bracket 1, thereby lubricating the bearings in the lubrication cavity. Although the lubricating oil is directly introduced into the key lubricating components in the compressor, the lubrication cavity 11 is a accommodating cavity with limited space. Therefore, most of the lubricating oil in the oil return passage 7 cannot flow back into the compressor in time, causing a large amount of lubricating oil to enter the refrigeration system with the exhaust gas, affecting the heat exchange effect of the system.

[0005] Since the scroll compressor in the prior art has an unreasonable oil return and storage structure, and the oil storage structure is easily affected by the centrifugal separation structure, resulting in technical problems such as a small amount of oil stored in the actual oil storage structure or the separated lubricating oil being carried away by the refrigerant, the present invention studies and designs a compressor oil return structure, a compressor and an air conditioner. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect of unreasonable setting of the oil return and oil storage structure of the scroll compressor in the prior art, which leads to small oil storage capacity in the actual oil storage structure, thereby providing a compressor oil return structure, a compressor and an air conditioner.

[0007] In order to solve the above problems, the present invention provides an oil return structure for a compressor, which comprises:

[0008] A stator plate, exhaust cover 1 and exhaust cover 2, the end surface of exhaust cover 1 facing the stator plate forms a first cavity by a recessed manner, and exhaust cover 2 is arranged in the first cavity. Exhaust cover 2 includes a main body and a protrusion, and the main body is connected to the stator plate to form an exhaust area between the two. The protrusion is arranged on the main body, and the interior of the protrusion is also a hollow second cavity, forming an oil separation cavity, and the oil separation cavity can be communicated with the exhaust area. The exterior of the main body and the protrusion together form an oil storage cavity with the exhaust cover 1, and the oil storage cavity is communicated with the oil separation cavity.

[0009] In some embodiments, one end of the protrusion is connected to the end face of the main body facing the exhaust cover 1, and the other end protrudes toward the exhaust cover 1. The protrusion has an open end, and the exhaust cover 1 is provided with an exhaust channel. The open end can be connected to the exhaust channel so that the oil separation chamber is connected to the exhaust channel.

[0010] In some embodiments, a separator is further included, and the separator is entirely disposed in the oil separation chamber, or the separator is entirely disposed in the exhaust channel, or the separator is partially disposed in the oil separation chamber and partially disposed in the exhaust channel, and the separator has a flow channel inside, one end of the flow channel flows with the oil separation chamber, and the other end flows with the exhaust channel.

[0011] In some embodiments, a return air channel 2 is further provided on the protrusion, and the return air channel 2 is located at a position opposite to the separator, and a return air channel 1 is opened on the separator, one end of the return air channel 2 is opposite to and connected to one end of the return air channel 1, the other end of the return air channel 2 is connected to the oil storage chamber, and the other end of the return air channel 1 is connected to the circulation channel inside the separator, so that the gas above the oil storage chamber can be discharged into the circulation channel through the return air channel 2 and the return air channel 1.

[0012] In some embodiments, a return air channel three is further provided on the protrusion, and the return air channel three is located below the return air channel two. One end of the return air channel three is connected to the oil storage chamber, and the other end is connected to the oil distribution chamber.

[0013] In some embodiments, when part of the separator is disposed in the oil separation chamber and part of it is disposed in the exhaust passage, the separator includes a mounting and fixing portion, the exhaust cover one being located at the exhaust passage and being configured as mounting portion one, the exhaust cover two being connected to the mounting and fixing portion and being configured as mounting portion two, and part of the mounting and fixing portion being fixed to the mounting portion one and partly to the mounting portion two.

[0014] In some embodiments, a limiting step is provided on the exhaust cover 1 and on the inner peripheral wall of the first cavity, forming the exhaust cover 2 matching portion 1, and the outer periphery of the body can be clamped on the exhaust cover 2 matching portion 1;

[0015] A second exhaust cover matching portion is formed on the bottom of the first cavity so as to protrude toward the second exhaust cover, and the second exhaust cover matching portion is matched with the body.

[0016] In some embodiments, when the oil return structure of the compressor includes a separator, and the exhaust cover 1 is provided with an exhaust passage, the separator includes a mounting portion, and the exhaust cover 1 is provided at the exhaust passage as the first mounting portion, and the exhaust cover 2 is provided at the portion connected to the mounting portion as the second mounting portion:

[0017] A circular hole is provided on the side of the second matching part of the exhaust cover facing the first cavity, forming the first mounting part, and part of the mounting and fixing part of the separator is inserted into the first mounting part; the second mounting part is a cylindrical stepped hole formed at the open end of the protruding part, and part of the mounting and fixing part of the separator is inserted into the cylindrical stepped hole.

[0018] In some embodiments, an air return channel four is further provided on the mounting and fixing portion, an air return channel five is provided on the exhaust cover two mating portion two, an oil storage groove is provided on the exhaust cover two and at a position opposite to the exhaust cover two mating portion two, the oil storage groove is connected to the oil storage cavity, one end of the air return channel four is connected to the circulation channel, and the other end is connected to the air return channel five, and the air return channel five is connected between the air return channel four and the oil storage groove.

[0019] In some embodiments, a side surface of the body facing the stator disk is recessed to form a third cavity, and the third cavity forms part or all of the exhaust area.

[0020] The main body is further provided with an air intake channel, one end of which is communicated with the exhaust area to take in air from the exhaust area, and the other end of which is communicated with the oil separation chamber inside the protrusion.

[0021] In some embodiments, an exhaust cover fastener is provided on the main body, and the first cavity is formed in the form of a groove on the side surface of the exhaust cover one facing the exhaust cover two, and the first cavity includes the oil storage cavity, and an exhaust cover two connecting piece is provided on the bottom surface of the first cavity to form an exhaust cover two mating part, and a through hole is provided on the main body, and the exhaust cover fastener can pass through the through hole and be mated with the exhaust cover two connecting piece to connect the exhaust cover one and the exhaust cover two into one.

[0022] In some embodiments, an oil return channel 1 is further provided on the main body, and the oil return channel 1 is staggered with the protrusion in the axial direction of the main body, and the oil return channel 1 is located radially outside the exhaust area. One end of the oil return channel 1 is connected to the oil storage chamber, and the other end can guide the oil to the part to be lubricated inside the compressor.

[0023] In some embodiments, an oil drain channel is provided on the protrusion, one end of the oil drain channel is connected to the oil separation chamber, and the other end is connected to the oil storage chamber, so that the oil in the oil separation chamber can be guided to the oil storage chamber and then into the oil return channel 1.

[0024] In some embodiments, the oil drainage channel is arranged at the bottom of the protrusion, and the oil drainage channel is opened downward, the upper end of the oil drainage channel is connected to the oil separation chamber, and the lower end of the oil drainage channel is connected to the space of the oil storage chamber located below the protrusion.

[0025] In some embodiments, the oil drainage channel is a notch formed on a side wall of the protrusion, and the outflow direction of the notch is upward.

[0026] In some embodiments, the projection along the axial direction is a rectangular structure;

[0027] The opening direction of the oil drain channel forms an acute angle θ with the long side direction of the protrusion. The long side direction of the protrusion is along the vertical direction, and the opening direction of the oil drain channel is along the oblique upward direction.

[0028] In some embodiments, a second oil return channel is provided at the center of the bottom of the protrusion, and the second oil return channel is connected to the first oil return channel. The bottom end of the protrusion is located on both sides of the second oil return channel and is provided with an oil return blocking structure. The oil return blocking structure extends downward and is separated from the bottom end of the exhaust cover one by a gap, so that the oil discharged upward from the oil discharge channel enters the oil storage chamber and then flows downward and enters the second oil return channel through the gap.

[0029] In some embodiments, the lower end of the notch of the oil drainage channel extends outward along its tangent direction to form an oil drainage guide structure, and the extension direction of the oil drainage guide structure forms the acute angle θ with the long side direction of the protrusion.

[0030] In some embodiments, the exhaust cover further comprises a sealing component 1, wherein the exhaust cover is provided on the outer periphery of the exhaust cover 2, and the sealing component 1 is provided between the inner periphery of the exhaust cover 1 and the outer periphery of the exhaust cover 2; and / or,

[0031] A first groove is provided on the end surface of the stator plate facing the exhaust cover 2. The first groove is located on the periphery of the exhaust area and is an annular groove. The oil return structure also includes a sealing component 2, which is clamped in the first groove.

[0032] The present invention also provides a compressor, comprising the oil return structure of the compressor described in any of the preceding items.

[0033] The present invention also provides an air conditioner, which includes the aforementioned compressor.

[0034] The oil return structure of a compressor, the compressor, and the air conditioner provided by the present invention have the following beneficial effects:

[0035] 1. The oil return structure of the compressor of the present invention is provided with an exhaust cover 2 in the first cavity on the end surface of the exhaust cover 1 facing the stator plate, and the exhaust cover 2 includes a structure of a main body and a protrusion. An exhaust area is formed between the main body and the stator plate, and an oil separation cavity is effectively formed inside the protrusion. The oil separation cavity is communicated with the exhaust area, so that oil and gas can be separated inside the oil separation cavity. At the same time, an oil storage cavity is formed together with the outside of the main body and the protrusion with the exhaust cover 1. The oil storage cavity is communicated with the oil separation cavity, and an oil storage cavity structure for storing oil can be formed inside the exhaust cover 1. Therefore, the present invention effectively utilizes the effective design on the stator plate and the cover body. Part of the space is used, so that an oil storage cavity is effectively opened without increasing the axial and radial dimensions of the compressor. The oil storage cavity has a large capacity, so that a large amount of oil can be stored in the oil storage structure. The cavity volume is large and there is no need to increase the size of the upper cover. It also effectively prevents the separated lubricating oil from being carried away by the refrigerant. While increasing the oil storage volume of the lubricating oil in the compressor, it does not increase the weight and size of the compressor. The present invention adopts the arrangement of an oil storage cavity in the upper cover. The oil storage cavity has a large cavity volume, and the projection area of ​​the oil storage cavity in the axial direction of the compressor can be set to be very large, which can be close to the entire disk surface of the compressor stator. Therefore, by increasing the cross-sectional area of ​​the oil storage cavity, the axial height of the oil storage cavity can be reduced.

[0036] 2. The sealed structure of the oil reservoir, located inside the compressor, prevents leakage from the reservoir to the outside of the compressor, maintaining a leakage level comparable to that of conventional structures. Furthermore, the reservoir's internal pressure is at exhaust pressure, and it communicates with the cyclone's oil chamber, eliminating the need for throttling or flow control, ensuring maximum storage of the oil separated by the cyclonic gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An internal cross-sectional view of the scroll compressor of Background Technology 1;

[0038] Figure 2 An internal cross-sectional view of the scroll compressor of Background Technology 2;

[0039] Figure 3 An internal cross-sectional view of the oil storage chamber portion of the scroll compressor of the present invention;

[0040] Figure 4 FIG1 is an exploded structural diagram of an exhaust cover 1 and an exhaust cover 2 inside a scroll compressor of the present invention;

[0041] Figure 5 for Figure 3 The internal structure diagram of the exhaust cover 1;

[0042] Figure 6 for Figure 3 A cross-sectional view of the exhaust cover 2;

[0043] Figure 7 for Figure 3 The back structure diagram of the exhaust cover 2;

[0044] Figure 8 An internal cross-sectional view of an oil storage chamber portion of a scroll compressor according to another embodiment of the present invention;

[0045] Figure 9 For Figure 8 The back structure diagram of the exhaust cover 2;

[0046] Figure 10 for Figure 8 A back structural diagram of another alternative embodiment of the exhaust cover 2.

[0047] The reference numerals indicate:

[0048] 1. Exhaust cover 1; 101. Mounting portion 1; 106. Exhaust cover 2 connector; 107. Exhaust cover 2 mating portion 2; 108. First cavity; 109. Exhaust cover 2 mating portion 1; 2. Static plate; 21. First groove; 12. Separator; 12a. Circulation channel; 121. Return air channel 1; 122. Mounting portion; 123. Separator; 124. Return air channel 4; 1010. Return air channel 5; 13. Exhaust cover 2; 13a. Main body; 13b. Protrusion; 13c. Open end; 131. Return oil channel 1; 132. Sealing portion Component installation part; 1313, oil storage groove; 1314, return oil channel 2; 1315, return oil blocking structure; 1316, oil drainage guide structure; 1331, return air channel 2; 1332, return air channel 3; 134, intake channel; 135, oil drainage channel; 136, installation part 2; 137, oil distribution chamber; 139, static disk seal fitting part; 14, sealing component 1; 15, sealing component 2; 16, exhaust cover fastener; 17, exhaust area; 18, oil storage chamber; 19, exhaust channel; D, oil drainage channel diameter; θ, oil drainage guide structure angle. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] like Figure 1The structure shown in the figure is a compressor structure of the prior art, which mainly includes a compressor upper cover, a stator, a rotor and a compressor drive support structure. An exhaust cavity, an oil separation cavity and an oil storage cavity are formed between the compressor stator and the upper cover. The oil storage cavity is relatively arranged below the oil separation cavity, and the highest oil storage liquid level in the oil storage cavity corresponds to the oil outlet hole at the bottom of the oil separation cavity. The structural position setting of the exhaust cavity, the oil separation cavity and the oil storage cavity in the prior art has the problem that the upper cover needs to be set very large, resulting in a large size and heavy weight of the compressor, and the axial oil separation length of the oil separation cavity is limited, resulting in a decrease in the actual oil separation efficiency. At the same time, the oil storage cavity is directly connected to the exhaust cavity through the oil separation cavity, and there is no throttling and pressure reduction structure in the middle. The pressure in the oil storage cavity fluctuates with the exhaust pressure. Due to the large pressure fluctuation between the oil storage cavity and the oil separation cavity, the lubricating oil separated by the oil separation cavity is difficult to enter the oil storage cavity in time and then be taken away by the exhaust, affecting the effect of oil storage and oil separation.

[0051] like Figure 2 The prior art shown in the figure has a compressor with a housing, a bracket, a moving plate, a static plate, an upper cover and a driving part. By setting an oil return channel in the compressor upper cover, the static plate and the bracket, the lubricating oil separated by the exhaust oil separation structure of the upper cover is returned to the cavity in the bracket. The two bearings in the lubrication cavity. Since the bracket cavity is a moving part accommodating part, the cavity space is limited, and there are moving parts such as an eccentric sleeve and a moving plate, which affect the oil storage capacity of the cavity. As a result, the separated lubricating oil cannot be completely stored in the compressor, and the excess lubricating oil will still be carried away by the exhaust gas into the system, affecting the heat exchange of the system.

[0052] The present invention combines Figure 3-10 As shown, the curve shows:

[0053] An embodiment of the present invention provides an oil return structure for a compressor (preferably an oil return structure for a scroll compressor), comprising:

[0054] A stator plate 2, an exhaust cover 1 and an exhaust cover 2 13, the end surface of the exhaust cover 1 facing the stator plate 2 forms a first cavity 108 by a recessed manner, the exhaust cover 2 13 is arranged in the first cavity 108, the exhaust cover 2 13 includes a main body 13a and a protrusion 13b, the main body 13a is connected to the stator plate 2 to form an exhaust area 17 therebetween, the protrusion 13b is arranged on the main body 13a, the interior of the protrusion 13b is also a hollow second cavity, forming an oil separation cavity 137, the oil separation cavity 137 can be communicated with the exhaust area 17, the exterior of the main body 13a and the protrusion 13b together with the exhaust cover 1 form an oil storage cavity 18, and the oil storage cavity 18 is communicated with the oil separation cavity 137.

[0055] The oil return structure of the compressor of the present invention is provided with an exhaust cover 2 in the first cavity between the exhaust cover 1 and the stator, and the exhaust cover 2 includes a structure of a main body and a protrusion. An exhaust area is formed between the main body and the stator, and an oil separation chamber is effectively formed inside the protrusion. The oil separation chamber is communicated with the exhaust area, so that oil and gas can be separated inside the oil separation chamber. At the same time, an oil storage chamber is formed together with the exhaust cover 1 on the outside of the main body and the protrusion. The oil storage chamber is communicated with the oil separation chamber, and an oil storage chamber structure for storing oil can be formed inside the exhaust cover 1. Therefore, the present invention effectively utilizes this part through the effective design on the stator and the cover. The space is large, so that an oil storage cavity is effectively opened without increasing the axial and radial dimensions of the compressor. The oil storage cavity has a large capacity, so that a large amount of oil can be stored in the oil storage structure. The cavity volume is large and there is no need to increase the size of the upper cover. It also effectively prevents the separated lubricating oil from being carried away by the refrigerant. While increasing the oil storage volume of the lubricating oil in the compressor, it does not increase the weight and size of the compressor. The present invention adopts the arrangement of an oil storage cavity in the upper cover. The oil storage cavity has a large cavity volume, and the projection area of ​​the oil storage cavity in the axial direction of the compressor can be set to be very large, which can be close to the entire disk surface of the compressor stator. Therefore, by increasing the cross-sectional area of ​​the oil storage cavity, the axial height of the oil storage cavity can be reduced.

[0056] Combine Figure 2 Invention point 1: A scroll compressor includes a casing and exhaust covers 1 and 2 and a stator 2. The exhaust cover 1 and the casing form a sealed cavity of the compressor. The sealed cavity also includes the stator 2 and the exhaust cover 2 13. The exhaust cover 2 is located between the stator and the exhaust cover 1. The exhaust cover 2 13 forms an exhaust area 17, an oil distribution cavity 137 and an oil storage cavity 18 with the stator and the exhaust cover 1 respectively.

[0057] Invention point description: The existing structure has only one exhaust cover, and the oil chamber is set on it. Figure 1 As shown, the space for the oil reservoir is limited. Either the reservoir volume is too small to meet the required oil storage capacity, or the reservoir is located on the other side of the exhaust cover, which increases the sealing requirement between the reservoir and the outside, making it difficult to meet the requirements for tight sealing. The present invention divides the exhaust cover into two, creating an oil reservoir through these two separate structures. This seal also prevents leakage from the entire unit. This achieves a larger reservoir volume without adding additional sealing difficulties.

[0058] The present invention provides an oil return and storage structure for a scroll compressor, which is arranged in the compressor exhaust cover to store the lubricating oil after exhaust separation in an oil storage chamber. At the same time, the oil storage chamber is connected to the interior of the compressor through an oil return passage, and the lubricating oil is returned to the medium-pressure and low-pressure parts of the compressor, thereby realizing the storage and return of the lubricating oil.

[0059] Core Invention Point 1: A compressor oil storage structure comprising an oil storage cavity, an oil inlet passage, an exhaust passage, and an oil drain passage. The oil storage structure comprises a first exhaust cover, which is sealed to the housing, and a second exhaust cover, which is sealed to the exhaust cover. The oil storage structure is located on the exhaust side of the fixed scroll. The second exhaust cover is disposed within the first exhaust cover, and together with the back of the stator disk, the second exhaust cover forms a stator disk exhaust area, forming an exhaust area on one side of the exhaust cover and an oil storage area on the other.

[0060] Core Invention Point 2: The oil storage chamber has a space enclosed by exhaust covers 1 and 2. Exhaust covers 1 and 2 are separate structures, and exhaust cover 2 is provided with an air inlet channel, an oil drain channel, and an oil return channel and / or an air return channel. The oil drain channel is provided at the bottom of the oil separation chamber in the exhaust cover, and the oil return channel is provided at the bottom of the oil storage chamber. A blocking structure is provided between the oil return channel and the oil drain channel (to prevent large amounts of gas from entering the oil return channel). The exhaust channel is provided at the top of the oil storage chamber to maintain the pressure in the oil storage chamber at the same level as the pressure in the oil separation chamber in the exhaust cover.

[0061] Core Invention Point 3: The exhaust cover oil separation chamber is located within the second exhaust cover and further includes an air inlet connecting the exhaust area and the separation chamber, causing the gas entering the separation chamber to generate a rotational motion. To achieve a better separation effect, a cylindrical structure with a central opening is also included. The cylindrical structure is inserted through the exhaust ports of the first and second exhaust covers, forming an interference fit between the two.

[0062] Core invention point 4: The above-mentioned exhaust cover 2 has at least two sealing features. The second sealing part is sealed with the back of the stator disc to form an exhaust area, and the first sealing part is sealed with the exhaust cover 1 to form an oil storage area.

[0063] Core Invention Point 5: A porous filter structure is installed within the exhaust oil reservoir chamber to separate the oil-gas mixture entering the reservoir from the bottom of the exhaust oil separation chamber. This ensures that lubricating oil primarily enters the oil discharge passage, while refrigerant gas passes through the porous filter structure and enters the upper exhaust passage. This multi-layered filter structure stores lubricating oil within the filter structure, preventing fluctuations in the oil reservoir level caused by fluctuations in compressor position.

[0064] The present invention solves the following technical problems:

[0065] 1. Increase the oil storage volume in the compressor without increasing the weight and size of the compressor;

[0066] 2. The seal of the oil storage chamber is set inside the compressor, which will not increase the outward leakage of the compressor.

[0067] Beneficial effects:

[0068] The present invention adopts an oil storage chamber provided in the upper cover. The volume of the oil storage chamber is large, and the projected area of ​​the oil storage chamber in the axial direction of the compressor can be set to be very large, which can be close to the entire disk surface of the compressor stator. Therefore, by increasing the cross-sectional area of ​​the oil storage chamber, the axial height of the oil storage chamber can be reduced. At the same time, the sealing structure of the oil storage chamber is provided inside the compressor, and the oil storage chamber will not leak like the outside of the compressor, and the leakage amount of the compressor can be kept equivalent to that of the traditional structure. Moreover, the pressure in the oil storage chamber is the exhaust pressure, and it is a connected structure with the cyclone oil chamber, so there is no need for throttling for flow control, and the oil separated by the cyclone gas can be stored to the greatest extent.

[0069] In some embodiments, one end of the protrusion 13b is connected to the end surface of the main body 13a facing the exhaust cover 1, and the other end protrudes toward the exhaust cover 1. The protrusion 13b has an open end 13c, and the exhaust cover 1 is provided with an exhaust channel 19. The open end 13c can be connected to the exhaust channel 19, so that the oil separation chamber 137 is connected to the exhaust channel 19.

[0070] In some embodiments, a separator 12 is further included, and the separator 12 is entirely disposed in the oil separation chamber 137, or the separator 12 is entirely disposed in the exhaust channel 19, or part of the separator 12 is disposed in the oil separation chamber 137 and part of the separator 12 is disposed in the exhaust channel 19, and the separator 12 has a circulation channel 12a inside, and one end of the circulation channel 12a is in circulation with the oil separation chamber 137 and the other end is in circulation with the exhaust channel 19.

[0071] In some embodiments, a return air channel 2 1331 is further provided on the protrusion 13b, and the return air channel 2 1331 is located at a position opposite to the separator 12 (preferably the upper end of the protrusion, where the upper end can generally refer to the upper side of the height center of the protrusion), and a return air channel 121 is provided on the separator 12, one end of the return air channel 2 1331 is opposite to and connected to one end of the return air channel 121, and the other end of the return air channel 2 1331 is connected to the oil storage chamber 18, and the other end of the return air channel 1 121 is connected to the circulation channel 12a inside the separator 12, so that the gas above the oil storage chamber 18 can be discharged into the circulation channel 12a through the return air channel 2 1331 and the return air channel 1 121.

[0072] In some embodiments, a return air channel three 1332 is further provided on the protrusion 13b, and the return air channel three 1332 is located below the return air channel two 1331. One end of the return air channel three 1332 is connected to the oil storage chamber 18, and the other end is connected to the oil separation chamber 137. The pressure in the oil separation chamber 137 can press the oil accumulated in the oil separation chamber 137 and on the upper part of the separator into the oil storage chamber 18 through the return air channel three 1332.

[0073] Invention point 4 (return air channel): The above exhaust cover also has a return air channel 2 1331 and a return air channel 3 1332, which are arranged on the upper part of the oil storage chamber (equivalent to the oil return channel). One end of the return air channel is connected to the oil storage chamber, and the other end is connected to the exhaust channel 19. The connection with the exhaust channel can be direct or as shown in FIG. Figure 3 Return air channel 2 1331 is shown as indirectly connected. The return air channel includes return air channel 2 provided on exhaust cover 2 and return air channel 1 121 provided on the cylindrical separator, which ultimately connects to exhaust channel 19. Alternatively, return air channel 3 1332 can be shown in the figure. The other end of return air channel 3 1332 connects to the internal space enclosed by the cylindrical separator 12 and the oil separation chamber. The return air chamber is shown as being located at the uppermost end of the internal space. The return air chamber is generally configured as a circular hole, with an optimal aperture of 1 to 4 mm.

[0074] It is explained that the setting of the return air channel can discharge the gas in the oil storage channel in time, prevent the pressure inside the oil storage chamber from increasing, and achieve a pressure roughly equivalent between the oil storage chamber and the exhaust chamber. In addition, the effect of the return air channel 2 1331 shown in the figure connects to the high-speed exhaust area inside the separator, where the air flow speed is fast and the static pressure is small, and a pressure lower than the exhaust pressure can be formed in the local area of ​​the return air channel of the oil storage chamber, so that the pressure of the oil storage chamber can be maintained higher. In addition, the return air channel 3 1332 shown in the figure is set at the top of the internal space. While maintaining the same pressure between the oil separation chamber and the oil storage chamber, the oil in the upper part of the internal space can be introduced into the oil storage chamber, thereby increasing the oil volume in the oil storage chamber.

[0075] In some embodiments, when part of the separator 12 is disposed in the oil separation chamber 137 and part of it is disposed in the exhaust passage 19, the separator 12 includes a mounting and fixing portion 122, and the exhaust cover 1 is located on the exhaust passage 19 and is configured as a mounting portion 101, and the exhaust cover 2 13 is connected to the mounting and fixing portion 122 and is configured as a mounting portion 2 136, and part of the mounting and fixing portion 122 is fixed to the mounting portion 101 and part of it is fixed to the mounting portion 2 136.

[0076] Invention point 6: Figure 3As shown, the cylindrical separator 12 is installed at least within the oil separation chamber of exhaust cover 2. The mounting portion 122 of the separator 12 mates with the second mounting portion 136 within the oil separation chamber of exhaust cover 2. As shown, the mounting portion 122 of the separator 12 also mates with the first mounting portion 101 on exhaust cover 1, typically using an interference fit. The first and second mounting portions are essentially coaxial.

[0077] This interference fit of the cylindrical separator 12 on the first and second exhaust caps effectively seals the oil storage, oil distribution, and exhaust chambers, preventing gas from the oil distribution chamber from entering the oil storage chamber and affecting oil separation efficiency and storage capacity. The coaxial design ensures a good interference fit, while the radial insertion of the separator further connects the first and second exhaust caps.

[0078] In some embodiments, a limiting step is provided on the exhaust cover 1 and on the inner peripheral wall of the first cavity 108, forming an exhaust cover second matching portion 109, and the outer periphery of the body 13a can be clamped on the exhaust cover second matching portion 109 (the exhaust cover second matching portion 109 is not provided at the position of the exhaust cover second matching portion 107 or is only provided with a small portion);

[0079] A second exhaust cover fitting portion 107 is formed at the bottom of the first cavity 108 and protrudes toward the second exhaust cover 13 . The second exhaust cover fitting portion 107 is engaged with the body 13 a .

[0080] In some embodiments, a circular hole is provided on the side of the exhaust cover second mating portion 107 facing the first cavity to form the mounting portion 101, and a portion of the mounting and fixing portion 122 of the separator 12 is inserted into the mounting portion 101; the mounting portion 136 is a cylindrical stepped hole formed at the open end of the protrusion 13b, and a portion of the mounting and fixing portion 122 of the separator 12 is inserted into the cylindrical stepped hole.

[0081] like Figure 8 As shown, this embodiment is Figure 3Regarding the alternative embodiment of the return air channel two and the return air channel three, a return air channel four 124 is further provided on the mounting and fixing portion 122, a return air channel five 1010 is provided on the exhaust cover two matching portion two 107, an oil storage groove 1313 is provided on the exhaust cover two 13 and at a position opposite to the exhaust cover two matching portion two 107, the oil storage groove 1313 is connected to the oil storage chamber 18, one end of the return air channel four 124 is connected to the circulation channel 12a, and the other end is connected to the return air channel five 1010, and the return air channel five 1010 is connected between the return air channel four 124 and the oil storage groove 1313. The oil storage groove is preferably an annular or arc-shaped groove, and the oil storage groove is located radially outside the exhaust area. The present invention can also discharge the gas above the oil storage chamber 18 into the circulation channel 12a and then into the exhaust channel 19 through the return air channel four and the return air channel five, thereby increasing the oil storage amount in the oil storage chamber.

[0082] In some embodiments, a side surface of the body 13a facing the stator plate 2 is recessed to form a third cavity, and the third cavity forms part or all of the exhaust area 17;

[0083] The main body 13a is further provided with an air intake channel 134, one end of which is connected to the exhaust area 17 to take in air from the exhaust area 17, and the other end of which is connected to the oil separation chamber 137 inside the protrusion 13b.

[0084] In some embodiments, when the oil return structure of the compressor includes a separator 12:

[0085] The separator 12 also includes a separation portion 123, which is a circular tubular structure. The outlet direction of the air inlet channel 134 is opposite to the separation portion 123 and is tangent to the outer contour edge surface of the separation portion 123, so that the oil and gas can rotate around the outer cylindrical surface of the separation portion 123 to separate the oil.

[0086] Invention point 2 (features of the exhaust cover): Figure 2 As shown, the above-mentioned exhaust cover 2 is also characterized by: an oil separation chamber 137 is provided in the exhaust cover 2, the oil separation chamber is provided in the same direction as the exhaust channel 19 on the exhaust cover 1, an air inlet channel 134, one end of which is connected to the exhaust chamber and the other end of which is connected to the oil separation chamber, an oil discharge channel 135 is provided at the bottom of the oil separation chamber, and an oil return channel 131, the oil return channel 1 is provided at the lower part of the oil storage chamber 18, and also has a mounting portion 2 136 for accommodating the cylindrical separator 12.

[0087] The invention's effects are illustrated below. After the oil and gas enter through intake passage 134, which is generally a circular hole, its outline, projected along the intake passage, is tangent to the outer edge of the oil separation chamber. Within the oil separation chamber, the oil and gas rotate around the cylindrical separator 12. This rotation generates centrifugal force, achieving separation. The separated lubricating oil is discharged through drain passage 135 and then stored and stabilized within the oil reservoir 18. The stabilized lubricating oil then enters the compressor's internal lubrication area through return passage 131 at the bottom of the reservoir, achieving internal circulation of the lubricating oil. Gas enters exhaust passage 19 from the inner hole of the cylindrical separator, and thus enters the heat exchange system.

[0088] In some embodiments, an exhaust cover fastener 16 is provided on the main body 13a (located on the bottom surface on one side of the exhaust area 17), the first cavity 108 includes the oil storage cavity 18, and an exhaust cover second connector 106 is provided on the bottom surface of the first cavity 108, forming an exhaust cover second mating part, and a through hole is provided on the main body 13a, and the exhaust cover fastener 16 can pass through the through hole and be mated with the exhaust cover second connector 106 to connect the exhaust cover 1 and the exhaust cover 2 13 into one.

[0089] In some embodiments, the exhaust cover fastener 16 is a bolt or a screw, and the exhaust cover second connector 106 is a stud structure having a threaded hole, and the bolt or screw can be matched with the threaded hole.

[0090] Invention point 3 (seals and fasteners): Figure 3 As shown, the oil reservoir 18 is formed by the open first cavity 108 of exhaust cover 1 and one end surface of exhaust cover 2. Exhaust cover 2 is installed toward the opening of exhaust cover 1, forming a sealed area around the outer periphery of exhaust cover 2, which is sealed by sealing component 14. Exhaust cover 1 is provided with an exhaust cover 2 connector 106, connecting exhaust covers 1 and 2 via exhaust cover fasteners 16. The fasteners are located on the bottom surface of the third cavity of exhaust cover 2, and exhaust cover 2 is axially fixed via exhaust cover 2 mating portion 109 on the outer periphery of exhaust cover 1.

[0091] Note: One advantage of placing the fasteners in the exhaust area is that they don't need to be sealed. Since both the exhaust and oil reservoir areas are high-pressure, even small leaks won't be a problem. Of course, the fasteners can also be placed anywhere else in the oil reservoir. Furthermore, exhaust cover 2 is fastened to exhaust cover 1 here, but screws could also be used to connect exhaust cover 2 to the stator.

[0092] In some embodiments, an oil return channel 131 is further provided on the main body 13a. The oil return channel 131 and the protrusion 13b are staggered in the axial direction of the main body 13a, and the oil return channel 131 is located radially outside the exhaust area 17. One end of the oil return channel 131 is connected to the oil storage chamber 18, and the other end can guide the oil to the part to be lubricated inside the compressor.

[0093] In some embodiments, an oil drain channel 135 is provided on the protrusion 13b, one end of the oil drain channel 135 is connected to the oil separation chamber 137, and the other end is connected to the oil storage chamber 18, so that the oil in the oil separation chamber 137 can be guided to the oil storage chamber 18 and then into the oil return channel 131.

[0094] In some embodiments, the oil drain channel 135 is arranged at the bottom of the protrusion 13b, and the oil drain channel 135 is opened downward, the upper end of the oil drain channel 135 is connected to the oil separation chamber 137, and the lower end is connected to the oil storage chamber 18 located in the space below the protrusion 13b.

[0095] Invention Point 5: Combination Figure 6 and Figure 7 It is explained that the opening of the above-mentioned oil discharge channel 135 is arranged on the oil separation chamber setting part on the oil storage chamber side of the exhaust cover, is designed toward the oil storage chamber side, and is arranged at the bottom of the oil separation chamber. The projected shape is a quadrilateral, and can also be other shapes with a larger oil discharge cross-section.

[0096] In some embodiments, the oil discharge channel 135 is a notch formed on the side wall of the protrusion 13 b , and the outflow direction of the notch is upward.

[0097] In some embodiments, the protrusion 13b is a rectangular strip structure (preferably, the body 13a is a disc structure, and the protrusion 13b is a rectangular strip structure extending from the outer edge of one radial side of the body 13a to the outer edge of the other radial side), and the projection of the protrusion 13b along the axial direction is a rectangular structure;

[0098] The opening direction of the oil drain channel 135 forms an acute angle θ with the long side direction of the protrusion 13 b . The long side direction of the protrusion 13 b is along the vertical direction, and the opening direction of the oil drain channel 135 is along the oblique upward direction.

[0099] In some embodiments, a second oil return channel 1314 is provided at the center of the bottom of the protrusion 13b, and the second oil return channel 1314 is connected to the first oil return channel 131. The bottom end of the protrusion 13b is located on both sides of the second oil return channel 1314, and an oil return blocking structure 1315 is provided. The oil return blocking structure 1315 extends downward and is separated from the bottom end of the exhaust cover 1 by a gap, so that the oil discharged upward from the oil discharge channel 135 enters the oil storage chamber 18 and then flows downward and enters the second oil return channel 1314 through the gap.

[0100] like Figure 8 The figure shows an alternative embodiment of the present invention. Compared with the above embodiment, the main difference is that the oil discharge passage 135 and the air return passage on the exhaust cover 2 are different.

[0101] Invention point 7 (forming a blocking structure to prevent oil from entering the oil return channel and generating a large amount of gas): combined Figure 8 and Figure 9 As shown, the key point of the present invention lies in the aforementioned oil drain channel disposed at the bottom of the oil separation chamber mounting portion (i.e., protrusion 13b). The opening of oil drain channel 135 faces radially in the oil storage chamber, forming an acute angle θ with the axial direction of the oil separation chamber. The oil return channel forms oil return channel 1 131 and oil return channel 2 1314 on exhaust cover 2. An oil return blocking structure 1315 is also disposed at the bottom of the oil separation chamber mounting portion (i.e., protrusion 13b). This creates a small gap, typically between 1 and 4 mm, with the oil storage chamber 18 of exhaust cover 1, ensuring smooth entry of oil from the oil storage chamber while preventing air from entering oil return channel 2 1314.

[0102] Note: The radial arrangement of the exhaust channel opening and the blocking portion is intended to make it more difficult for the gas in the oil discharge channel to enter the oil return channel, thereby ensuring that the oil return channel is entirely filled with lubricating oil.

[0103] In some embodiments, the oil drainage channel 135 extends outward for a certain length along its tangential direction at the lower end of the notch to form an oil drainage guide structure 1316, and the extension direction of the oil drainage guide structure 1316 forms the acute angle θ with the long side direction of the protrusion 13b.

[0104] Invention point 8: An oil drainage guide structure 1316 is provided in the outlet direction of the above-mentioned oil drainage channel. The guide angle of the oil drainage guide structure is generally between 45 and 80 degrees. The oil drainage channel is provided on both sides of the oil separation chamber. The circular aperture on the projection of the oil drainage channel is preferably between 2 and 6 mm.

[0105] In some embodiments, the oil drainage channel 135 includes an arc segment and two straight segments, the straight segment located relatively above is connected to the upper end of the arc segment and extends along the tangent direction of the upper end to the upper end of the notch, and the straight segment located relatively below is connected to the lower end of the arc segment and extends along the tangent direction of the lower end to the lower end of the notch.

[0106] In some embodiments, the angle θ is in the range of 45 to 80°, and the diameter of the arc segment is in the range of 2 to 6 mm.

[0107] In some embodiments, the oil drainage channels 135 are provided on both side walls of the protrusion 13 b , and an oil drainage guide structure 1316 is provided at each oil drainage channel 135 .

[0108] In some embodiments, a sealing component 14 is further included, wherein the exhaust cover 1 is sleeved on the outer periphery of the exhaust cover 2 13, and the sealing component 14 is arranged between the inner periphery of the exhaust cover 1 and the outer periphery of the exhaust cover 2 13; and / or,

[0109] A first groove 21 is provided on the end surface of the stator plate 2 facing the exhaust cover 13. The first groove 21 is located on the periphery of the exhaust area 17, and the first groove 21 is an annular groove. The oil return structure also includes a sealing component 15, and the sealing component 15 is clamped in the first groove.

[0110] The sealed structure of the oil reservoir, located inside the compressor, prevents leakage from the reservoir to the outside of the compressor, maintaining a leakage level comparable to that of conventional structures. Furthermore, the reservoir's internal pressure is at exhaust pressure, and it communicates with the cyclone's oil chamber, eliminating the need for throttling for flow control and maximizing storage of the oil separated by the cyclonic gas.

[0111] The present invention also provides a compressor (preferably a scroll compressor), which includes the oil return structure of the compressor described in any of the preceding items.

[0112] The present invention also provides an air conditioner, which includes the aforementioned compressor.

[0113] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0114] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A compressor oil return structure, characterized by: include: A static disk (2), an exhaust cover 1 (1) and an exhaust cover 2 (13), wherein the end surface of the exhaust cover 1 (1) facing the static disk (2) forms a first cavity (108) by means of a recess, and the exhaust cover 2 (13) is arranged in the first cavity (108), and the exhaust cover 2 (13) includes a body (13a) and a protruding portion (13b), and the body (13a) is connected to the static disk (2) to enclose an exhaust area (17) therebetween. The protrusion (13b) is provided on the main body (13a), the interior of the protrusion (13b) is also a hollow second cavity, forming an oil separation cavity (137), the oil separation cavity (137) can be communicated with the exhaust area (17), the exterior of the main body (13a), the protrusion (13b) and the exhaust cover (1) together form an oil storage cavity (18), and the oil storage cavity (18) is communicated with the oil separation cavity (137); The exhaust cover (1) is provided with an exhaust channel (19). The separator (12) is also provided, wherein the separator (12) is entirely provided in the oil separation chamber (137), or the separator (12) is entirely provided in the exhaust passage (19), or a portion of the separator (12) is provided in the oil separation chamber (137) and a portion of the separator (12) is provided in the exhaust passage (19), and a flow passage (12a) is provided inside the separator (12), wherein one end of the flow passage (12a) is in communication with the oil separation chamber (137) and the other end is in communication with the exhaust passage (19); The protruding portion (13b) is further provided with a second air return channel (1331), the second air return channel (1331) is located at a position opposite to the separating element (12), the separating element (12) is provided with a first air return channel (121), one end of the second air return channel (1331) is opposite to and communicates with one end of the first air return channel (121), the other end of the second air return channel (1331) is communicated with the oil storage chamber (18), and the other end of the first air return channel (121) is communicated with the circulation channel (12a) inside the separating element (12), so that the gas above the oil storage chamber (18) can be discharged into the circulation channel (12a) through the second air return channel (1331) and the first air return channel (121); The protruding portion (13b) is also provided with a third air return channel (1332), which is located below the second air return channel (1331). One end of the third air return channel (1332) is connected to the oil storage chamber (18), and the other end is connected to the oil distribution chamber (137).

2. The oil return structure of the compressor according to claim 1, characterized in that: One end of the protrusion (13b) is connected to the end surface of the main body (13a) facing the exhaust cover (1), and the other end protrudes toward the exhaust cover (1). The protrusion (13b) has an open end (13c), and the open end (13c) can be connected to the exhaust channel (19) so that the oil separation chamber (137) is connected to the exhaust channel (19).

3. The oil return structure of the compressor according to claim 2, characterized in that: When part of the separating element (12) is arranged in the oil separation chamber (137) and part of it is arranged in the exhaust passage (19), the separating element (12) includes a mounting and fixing portion (122), the exhaust cover (1) is arranged at the exhaust passage (19) as the mounting portion (101), the exhaust cover (1) is arranged at the portion connected to the mounting and fixing portion (122) as the mounting portion (136), and part of the mounting and fixing portion (122) is fixed to the mounting portion (101) and part of it is fixed to the mounting portion (136).

4. The oil return structure of the compressor according to claim 3, characterized in that: A limited step is provided on the exhaust cover 1 (1) and on the inner peripheral wall of the first cavity (108), forming an exhaust cover second matching portion 1 (109), and the outer periphery of the main body (13a) can be clamped on the exhaust cover second matching portion 1 (109); The groove bottom of the first cavity (108) is formed with a second exhaust cover matching portion (107) protruding toward the second exhaust cover (13), and the second exhaust cover matching portion (107) is matched with the main body (13a).

5. The oil return structure of the compressor according to claim 4, characterized in that: A circular hole is provided on the side of the second matching portion (107) of the exhaust cover facing the first cavity to form the first mounting portion (101), and a portion of the mounting and fixing portion (122) of the separator (12) is inserted into the first mounting portion (101); the second mounting portion (136) is a cylindrical stepped hole formed at the open end of the protruding portion (13b), and a portion of the mounting and fixing portion (122) of the separator (12) is inserted into the cylindrical stepped hole.

6. The oil return structure of the compressor according to any one of claims 1 to 5, characterized in that: A side surface of the body (13a) facing the static disk (2) forms a third cavity in a concave manner, and the third cavity forms part or all of the exhaust area (17); The main body (13a) is also provided with an air intake channel (134), one end of which is in communication with the exhaust area (17) to allow air to enter from the exhaust area (17), and the other end of which is in communication with the oil separation chamber (137) inside the protruding portion (13b).

7. The oil return structure of the compressor according to claim 6, characterized in that: The main body (13a) is provided with an exhaust cover fastener (16), the first cavity (108) includes the oil storage cavity (18), and the bottom surface of the first cavity (108) is provided with an exhaust cover second connector (106) to form an exhaust cover second matching portion, and the main body (13a) is provided with a through hole, and the exhaust cover fastener (16) can pass through the through hole and be matched with the exhaust cover second connector (106) to connect the exhaust cover one (1) and the exhaust cover two (13) into one.

8. The oil return structure of the compressor according to claim 6, characterized in that: The main body (13a) is further provided with an oil return channel (131). The oil return channel (131) and the protrusion (13b) are staggered in the axial direction of the main body (13a), and the oil return channel (131) is located radially outside the exhaust area (17). One end of the oil return channel (131) is connected to the oil storage chamber (18), and the other end can guide oil to the part to be lubricated inside the compressor.

9. The oil return structure of the compressor according to claim 8, characterized in that: An oil discharge channel (135) is provided on the protruding portion (13b), one end of the oil discharge channel (135) is communicated with the oil separation chamber (137), and the other end is communicated with the oil storage chamber (18), so that the oil in the oil separation chamber (137) can be guided to the oil storage chamber (18) and then enter the oil return channel 1 (131).

10. The oil return structure of the compressor according to claim 9, characterized in that: The oil discharge channel (135) is provided at the bottom of the protruding portion (13b), and the oil discharge channel (135) is opened downward. The upper end of the oil discharge channel (135) is communicated with the oil separation chamber (137), and the lower end of the oil discharge channel (135) is communicated with the space of the oil storage chamber (18) located below the protruding portion (13b).

11. The oil return structure of the compressor according to claim 9, characterized in that: The oil discharge channel (135) is a notch formed on the side wall of the protruding portion (13b), and the outflow direction of the notch is upward.

12. The oil return structure of the compressor according to claim 11, characterized in that: The projection (13b) along the axial direction is a rectangular structure; The opening direction of the oil drain channel (135) forms an acute angle θ with the long side direction of the protrusion (13b), the long side direction of the protrusion (13b) is along the vertical direction, and the opening direction of the oil drain channel (135) is along the oblique upward direction.

13. The oil return structure of the compressor according to claim 12, characterized in that: A second oil return channel (1314) is provided at the center of the bottom of the protrusion (13b), and the second oil return channel (1314) is communicated with the first oil return channel (131). The bottom end of the protrusion (13b) is located on both sides of the second oil return channel (1314), and an oil return blocking structure (1315) is provided. The oil return blocking structure (1315) extends downward and is spaced apart from the bottom end of the exhaust cover (1) by a gap, so that the oil discharged upward from the oil discharge channel (135) enters the oil storage chamber (18) and then flows downward and enters the second oil return channel (1314) through the gap.

14. The oil return structure of the compressor according to claim 12, characterized in that: An oil drainage guide structure (1316) is formed by extending a certain length outwards along the tangential direction of the notch of the oil drainage channel (135). The extension direction of the oil drainage guide structure (1316) forms the acute angle θ with the long side direction of the protrusion (13b).

15. The oil return structure of the compressor according to claim 6, characterized in that: It also includes a sealing component 1 (14), wherein the exhaust cover 1 (1) is sleeved on the outer periphery of the exhaust cover 2 (13), and the sealing component 1 (14) is arranged at a position between the inner periphery of the exhaust cover 1 (1) and the outer periphery of the exhaust cover 2 (13); and / or, A first groove (21) is provided on the end surface of the stator (2) facing the exhaust cover 2 (13), the first groove (21) is located on the periphery of the exhaust area (17), and the first groove (21) is an annular groove. The oil return structure also includes a sealing component 2 (15), and the sealing component 2 (15) is clamped in the first groove.

16. A compressor, characterized in that: The oil return structure of the compressor comprises the oil return structure of any one of claims 1-15.

17. An air conditioner, characterized in that: Including the compressor according to claim 16.

Images