Lower flange assembly and compressor

Abstract

The invention provides a lower flange assembly and a compressor, the lower flange assembly comprises a flange body, an oil guide hole is formed in the flange body, and the two ends of the oil guide hole respectively extend to the upper end face and the lower end face of the flange body; the capillary structure is arranged in the oil guide hole and extends in the axial direction of the oil guide hole; the lower end of the capillary structure extends out of the lower end of the oil guide hole and extends into an oil storage structure located below the flange body, so that oil in the oil storage structure moves to the upper end of the capillary structure from the lower end of the capillary structure along the capillary structure; the upper end of the capillary structure extends to the upper end of the oil guide hole, so that oil moving to the upper end of the capillary structure flows into a gap in the upper end face of the flange body, and a good lubricating effect is achieved between the flange body and a roller and between the flange body and a sliding piece.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a lower flange assembly and a compressor. Background Art

[0002] At present, rotary compressors are mainly used in household air-conditioning systems.

[0003] Currently, it is necessary to reduce the warming potential of air-conditioning devices; therefore, the refrigerant used needs to be changed from the existing R32 to a natural refrigerant such as R290.

[0004] However, since the refrigerant of an air-conditioning device having a relatively low warming potential is often a flammable refrigerant, it is necessary to reduce the amount of refrigerant sealed in the air-conditioning device.

[0005] As one of the technical means, the shell pressure of the rotary compressor needs to be low pressure; however, low back-pressure compressors have difficulty in pumping the refrigerant oil in the oil pool into various parts of the moving components in a timely manner, which can easily cause contact friction between the components and lead to structural failure.

[0006] Especially for lubrication inside the cylinder, a large amount of refrigerant oil is often poured in to make the oil level submerge the lower flange, so as to ensure that the crankshaft, roller and lower flange will not have contact friction. However, pouring a large amount of refrigerant oil will cause an increase in oil discharge. Summary of the invention

[0007] The main purpose of the present invention is to provide a lower flange assembly and a compressor to solve the problem of high exhaust oil discharge rate of the scroll compressor in the prior art.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a lower flange assembly is provided, which is applied to a compressor, and the lower flange assembly comprises: a flange body, an oil guide hole is provided on the flange body, and two ends of the oil guide hole extend to the upper end surface and the lower end surface of the flange body respectively; a capillary structure is arranged in the oil guide hole and extends along the axial direction of the oil guide hole; wherein the lower end of the capillary structure extends from the lower end of the oil guide hole and extends into the oil storage structure located below the flange body, so that the oil in the oil storage structure moves from the lower end of the capillary structure along the capillary structure to the upper end of the capillary structure; the upper end of the capillary structure extends to the upper end portion of the oil guide hole, so that the oil moved to the upper end of the capillary structure flows into the gap on the upper end surface of the flange body; the gap on the upper end surface of the flange body comprises a gap between the upper end surface of the flange body and the lower end surface of the roller of the compressor, and a gap between the upper end surface of the flange body and the lower end surface of the sliding vane of the compressor.

[0009] Furthermore, there are multiple oil guide holes, each of which is provided with a capillary structure; the multiple oil guide holes include a first oil guide hole and a second oil guide hole; the oil storage structure includes: an oil pool, the lower end of the capillary structure in the first oil guide hole extends into the oil pool; an oil storage space, the mounting part of the compressor is connected to the lower end surface of the flange body, and an oil storage space is formed between the mounting part and the flange body; an exhaust channel is opened on the flange body, the upper end of the exhaust channel is connected to the compression chamber of the compressor, and the lower end of the exhaust channel is connected to the oil storage space, so that the compressed gas in the compression chamber flows into the oil storage space through the exhaust channel, and the oil droplets separated from the compressed gas are deposited at the bottom of the oil storage space; the lower end of the capillary structure in the second oil guide hole extends into the bottom oil liquid of the oil storage space.

[0010] Furthermore, there is at least one first oil guide hole.

[0011] Furthermore, there is at least one second oil guide hole.

[0012] Furthermore, the lower flange assembly also includes a supporting portion having a supporting channel, which is located below the flange body; the capillary structure in the oil guide hole is penetrated in the supporting channel, and the lower end of the capillary structure extends from the lower end of the supporting channel to extend into the oil storage structure.

[0013] Furthermore, the capillary structure includes a long strip structure of a capillary tube and / or a capillary fiber material, the extension direction of the capillary tube is the same as the extension direction of the capillary structure, and the extension direction of the long strip structure is the same as the extension direction of the capillary structure.

[0014] Furthermore, an oil retention groove is concavely formed on the upper end surface of the flange body, and the oil retention groove is connected to the second oil guide hole, so that the oil at the upper end of the capillary structure in the second oil guide hole flows into the oil retention groove and then flows into the gap on the upper end surface of the flange body.

[0015] Furthermore, the lower end of the capillary structure in the first oil guide hole extends into the bottom of the oil pool.

[0016] Further, relative to the outer periphery of the flange body, the first oil guide hole is arranged close to the central axis of the flange body.

[0017] Furthermore, the flange body includes a middle portion and a side portion, and the side portion is arranged around the middle portion; the upper end surface of the middle portion and the upper end surface of the side portion are located on the same plane and together form the upper end surface of the flange body; the lower end surface of the middle portion is located on the side of the lower end surface of the side portion away from the upper end surface of the flange body; the first oil guide hole is arranged on the middle portion, and the second oil guide hole is arranged on the side portion.

[0018] Furthermore, a first channel is provided on the flange body, and two ends of the first channel extend to the upper end surface and the lower end surface of the flange body respectively; the lower end of the first channel is connected to the oil storage space, and the upper end of the first channel is connected to the air outlet of the compressor, so that the compressed gas flowing into the oil storage space is discharged after passing through the first channel and the air outlet in sequence.

[0019] According to another aspect of the present invention, a compressor is provided, which includes the above-mentioned lower flange assembly.

[0020] By applying the technical solution of the present invention, the lower flange assembly includes a flange body, an oil guide hole is provided on the flange body, and the upper and lower ends of the oil guide hole extend to the upper end surface and the lower end surface of the flange body respectively; the lower flange assembly also includes a capillary structure, which is arranged in the oil guide hole and extends along the axial direction of the oil guide hole.

[0021] The lower end of the capillary structure extends from the lower end of the oil guide hole and extends into the oil storage structure located below the flange body, so that the oil in the oil storage structure moves from the lower end of the capillary structure along the capillary structure to the upper end of the capillary structure under the capillary action.

[0022] The upper end of the capillary structure extends to the upper end of the oil guide hole; the oil moved to the upper end of the capillary structure can flow into the gap on the upper end surface of the flange body; in this way, a good lubrication effect can be achieved between the flange body and the roller, and between the flange body and the sliding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of an embodiment of a compressor according to the present invention is shown;

[0025] Figure 2 Shows Figure 1 A partial enlarged view of the lower flange assembly of the compressor;

[0026] Figure 3 A schematic structural diagram of a lower flange assembly according to the present invention is shown; wherein the capillary structure includes a capillary tube;

[0027] Figure 4 A schematic structural diagram of a lower flange assembly according to the present invention is shown; wherein the capillary structure comprises a long strip structure of a capillary fiber material;

[0028] Figure 5 A top view of a lower flange assembly according to the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 100, lower flange assembly;

[0031] 10. Flange body; 101. Middle part; 102. Side part; 11. Oil guide hole; 111. First oil guide hole; 112. Second oil guide hole; 12. Oil retention groove; 13. First channel; 14. Exhaust channel; 15. Oil return channel;

[0032] 20. capillary structure; 30. supporting part;

[0033] 91. Oil sump; 92. Roller; 93. Slide; 94. Cylinder; 95. Mounting part; 951. Oil storage space; 952. High-pressure oil sump; 96. Motor; 97. Crankshaft; 981. Air inlet; 982. Low-pressure chamber; 983. Air outlet; 99. Upper flange; 990. Third channel; 991. Air intake; 992. Upper muffler; 993. Air inlet. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] The present invention provides a lower flange assembly 100, which is used in a compressor, please refer to Figures 1 to 5 The lower flange assembly 100 includes a flange body 10 .

[0038] The flange body 10 is arranged below the cylinder 94 of the compressor to close the lower end of the cylinder 94; the upper end surface of the flange body 10 is in sealing contact with the lower end surface of the cylinder 94; the upper end surface of the flange body 10 is in contact with the lower end surface of the roller 92 in the cylinder 94, and the upper end surface of the flange body 10 is in contact with the lower end surface of the sliding vane 93 in the cylinder 94; since the roller 92 rotates and the sliding vane 93 slides, there is a gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and there is a gap between the upper end surface of the flange body 10 and the lower end surface of the sliding vane 93.

[0039] An oil guide hole 11 is provided on the flange body 10, and the upper and lower ends of the oil guide hole 11 extend to the upper end surface and the lower end surface of the flange body 10 respectively; the lower flange assembly 100 also includes a capillary structure 20, which is arranged in the oil guide hole 11 and extends along the axial direction of the oil guide hole 11.

[0040] The lower end of the capillary structure 20 extends from the lower end of the oil guide hole 11 and extends into the oil storage structure located below the flange body 10, so that the oil in the oil storage structure moves from the lower end of the capillary structure 20 along the capillary structure 20 to the upper end of the capillary structure 20 under the capillary action.

[0041] The upper end of the capillary structure 20 extends to the upper end of the oil guide hole 11; the oil moved to the upper end of the capillary structure 20 can flow into the gap on the upper end surface of the flange body 10; the gap on the upper end surface of the flange body 10 includes the gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and the gap between the upper end surface of the flange body 10 and the lower end surface of the sliding plate 93; in this way, a good lubrication effect can be achieved between the flange body 10 and the roller 92, and between the flange body 10 and the sliding plate 93.

[0042] It should be noted that capillary action refers to the process in which the oil in the oil storage structure infiltrates the fine fiber wall surface of the capillary structure 20 and moves upward along the gaps between the fibers. Specifically, since the capillary structure 20 is an oil-infiltrated solid, the oil molecules will be spread on the fiber wall surface to the maximum extent under the action of gravity. The oil molecules spread on the fiber wall surface will "pull up" the oil molecules below it through surface tension, and the pulled-up oil molecules will be spread again on the higher fiber wall surface, and this cycle will continue, so that the oil level in the fiber gaps continues to rise, thereby realizing the bottom-up transportation process of the oil.

[0043] Specifically, the axial direction of the flange body 10 is the same as the axial direction of the compressor.

[0044] Optionally, the axial direction of the oil guide hole 11 is parallel to the axial direction of the flange body 10 , that is, the oil guide hole 11 penetrates the flange body 10 along the axial direction of the flange body 10 .

[0045] Optionally, the upper end of the capillary structure 20 is flush with the upper end surface of the flange body 10 .

[0046] In the present application, the oil storage structure includes an oil pool 91 and an oil storage space 951; wherein, the compressor includes a mounting member 95, the mounting member 95 is connected to the lower end surface of the flange body 10, and an oil storage space 951 is formed between the mounting member 95 and the flange body 10; an exhaust channel 14 is opened on the flange body 10, and the upper and lower ends of the exhaust channel 14 extend to the upper and lower end surfaces of the flange body 10 respectively, the upper end of the exhaust channel 14 is connected to the compression chamber of the compressor, and the lower end of the exhaust channel 14 is connected to the oil storage space 951, so that the compressed gas in the compression chamber flows into the oil storage space 951 through the exhaust channel 14, and the compressed gas carries oil droplets, and the oil droplets separated from the compressed gas are deposited at the bottom of the oil storage space 951.

[0047] The gas in the exhaust channel 14 flows from its upper end to the lower end. During the flow of the compressed gas through the exhaust channel 14, the followability of the droplets is weakened due to changes in the flow field velocity, droplet size and distribution, and the liquid and gas in the gas-liquid mixture are separated; the separated liquid is deposited at the bottom of the oil storage space 951 under the action of gravity.

[0048] There are multiple oil guide holes 11, each of which is provided with a capillary structure 20; the multiple oil guide holes 11 include a first oil guide hole 111 and a second oil guide hole 112. The lower end of the capillary structure 20 in the first oil guide hole 111 extends into the oil pool 91, so that the oil in the oil pool 91 moves from the lower end of the capillary structure 20 in the first oil guide hole 111 along the capillary structure 20 to the upper end of the capillary structure 20. The lower end of the capillary structure 20 in the second oil guide hole 112 extends into the bottom oil in the oil storage space 951, so that the oil in the bottom oil in the oil storage space 951 moves from the lower end of the capillary structure 20 in the second oil guide hole 112 along the capillary structure 20 to the upper end of the capillary structure 20.

[0049] Optionally, there is at least one first oil guide hole 111 .

[0050] Optionally, there is at least one second oil guide hole 112 .

[0051] Specifically, the oil moved to the upper end of the capillary structure 20 in the first oil guide hole 111 flows into the gap on the upper end surface of the flange body 10. That is, the oil moved to the upper end of the capillary structure 20 in the first oil guide hole 111 flows into the gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and / or flows into the gap between the upper end surface of the flange body 10 and the lower end surface of the sliding sheet 93.

[0052] Specifically, the oil moved to the upper end of the capillary structure 20 in the second oil guide hole 112 flows into the gap on the upper end surface of the flange body 10. That is, the oil moved to the upper end of the capillary structure 20 in the second oil guide hole 112 flows into the gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and / or flows into the gap between the upper end surface of the flange body 10 and the lower end surface of the sliding sheet 93.

[0053] Optionally, the axial direction of the exhaust passage 14 is parallel to the axial direction of the flange body 10 .

[0054] Optionally, the mounting member 95 is a lower muffler.

[0055] In the prior art, for the oil accumulated on the lower muffler, on the one hand, when the compressed gas flowing into the lower muffler and the lower flange passes over the oil accumulated on the lower muffler, the compressed gas further carries the oil, thereby increasing the oil content of the compressed gas, and further increasing the oil discharge rate of the compressor; on the other hand, due to the accumulation of oil on the lower muffler, the actual oil used to lubricate the compressor is reduced, thereby affecting the lubrication effect of the compressor, and further affecting the operation of the compressor; thirdly, due to the accumulation of oil on the lower muffler, the actual oil used to lubricate the compressor is reduced, so it is necessary to increase the oil injection into the compressor to make up for the lack of oil for good lubrication of the compressor, which will lead to oil waste and increased oil costs.

[0056] The present application sets a second oil guide hole 112 and a capillary structure 20 therein, so that the oil on the lower muffler can be timely directed to the gap on the upper end surface of the flange body 10; on the one hand, the accumulation of oil on the lower muffler can be reduced or avoided, thereby avoiding an increase in the oil content of the compressed gas, and further avoiding an increase in the oil discharge rate of the compressor; on the other hand, the oil on the lower muffler is directed to the gap on the upper end surface of the flange body 10 to lubricate the flange body 10 and the roller 92 and / or the vane 93, thereby ensuring the lubrication effect on the compressor and further ensuring the operation of the compressor; thirdly, the oil on the lower muffler is directed to the gap on the upper end surface of the flange body 10 to lubricate the flange body 10 and the roller 92 and / or the vane 93, thereby reducing the oil injection amount of the compressor, avoiding or reducing oil waste, and helping to reduce oil costs.

[0057] In the present application, the lower flange assembly 100 further includes a support portion 30 having a support channel, and the upper and lower ends of the support channel extend to the upper end surface and the lower end surface of the support portion 30 respectively; the support portion 30 is located below the flange body 10, and the support channel is located below the oil guide hole 11; the capillary structure 20 in the oil guide hole 11 is penetrated in the support channel, that is, the capillary structure 20 is penetrated in the oil guide hole 11 and the support channel; the lower end of the capillary structure 20 extends from the lower end of the support channel to extend into the oil storage structure. By providing the support portion 30, the portion of the capillary structure 20 extending from the oil guide hole 11 is supported and shaped, so as to prevent the portion of the capillary structure 20 extending from the oil guide hole 11 from swinging arbitrarily.

[0058] Optionally, the support portion 30 is connected to the lower end surface of the flange body 10 so that the upper end of the support channel is connected to the lower end of the oil guide hole 11. Alternatively, the support portion 30 is not connected to the flange body 10, and the support portion 30 is fixed on the capillary structure 20 by the friction between the support portion 30 and the capillary structure 20 in the support channel.

[0059] Optionally, the support channel is coaxially arranged with the oil guide hole 11 so that the portion of the capillary structure 20 extending from the oil guide hole 11 can be maintained in the same straight line direction as the portion of the capillary structure 20 penetrating the oil guide hole 11, so as to facilitate the movement of oil along the capillary structure 20.

[0060] Optionally, the support portion 30 is a tubular structure, and the lumen of the support portion 30 is a support channel.

[0061] Optionally, each oil guide hole 11 corresponds to a supporting portion 30 .

[0062] In the present application, the capillary structure 20 is a capillary material capable of producing a capillary action.

[0063] Specifically, the capillary structure 20 includes a capillary tube and / or a strip structure of capillary fiber material. The extension direction of the capillary tube is the same as the extension direction of the capillary structure 20 , and the extension direction of the strip structure of capillary fiber material is the same as the extension direction of the capillary structure 20 .

[0064] like Figure 3 As shown, the capillary structure 20 includes a plurality of capillaries. Figure 4 As shown, the capillary structure 20 comprises a long strip structure of capillary fiber material, and the shape of the long strip structure is similar to a wick.

[0065] Optionally, if the portion of the capillary structure 20 extending from the oil guide hole 11 can be shaped itself and is not easily deformed, the support portion 30 can be omitted.

[0066] In the present application, an oil retention groove 12 is recessed on the upper end surface of the flange body 10, and the oil retention groove 12 is connected to the second oil guide hole 112, so that the oil at the upper end of the capillary structure 20 in the second oil guide hole 112 flows into the oil retention groove 12 and then flows into the gap on the upper end surface of the flange body 10.

[0067] By providing the oil retention groove 12, on the one hand, the contact area between the upper end surface of the flange body 10 and the sliding vane 93 and / or the roller 92 can be reduced, thereby reducing the friction force caused by the upper end surface of the flange body 10 to the sliding vane 93 and / or the roller 92; on the other hand, before the compressor is operated, oil can be stored in the oil retention groove 12, and then at the moment the compressor is started, the sliding vane 93 and / or the roller 92 and the upper end surface of the flange body 10 can be lubricated with oil.

[0068] Optionally, the oil retention groove 12 is a strip groove, and the extension direction of the oil retention groove 12 is perpendicular to the axial direction of the flange body 10; along the extension direction of the oil retention groove 12, one end of the oil retention groove 12 extends to the hole wall of the second oil guide hole 112 to communicate with the second oil guide hole 112.

[0069] Optionally, the oil retention groove 12 is extended along a radial line of the flange body 10 .

[0070] Optionally, the oil retention groove 12 is located below the sliding vane 93 .

[0071] In the present application, a first channel 13 is provided on the flange body 10, and both ends of the first channel 13 extend to the upper end surface and the lower end surface of the flange body 10 respectively; the lower end of the first channel 13 is connected to the oil storage space 951, and the upper end of the first channel 13 is connected to the air outlet 983 of the compressor, so that the compressed gas flowing into the oil storage space 951 is discharged after passing through the first channel 13 and the air outlet 983 in sequence.

[0072] Optionally, the axial direction of the first channel 13 is parallel to the axial direction of the flange body 10 .

[0073] Specifically, the air outlet 983 is provided on the upper flange 99 of the compressor; the cylinder 94 is provided with a second channel, the upper and lower ends of the second channel respectively extend to the upper end surface and the lower end surface of the cylinder 94; the lower end of the second channel is connected with the upper end of the first channel 13; the upper flange 99 is provided with a third channel 990, the lower end of the third channel 990 extends to the lower end surface of the upper flange 99, the upper end of the second channel is connected with the lower end of the third channel 990, and the upper end of the third channel 990 is connected with the air outlet 983. The compressed gas flowing into the oil storage space 951 is discharged after passing through the first channel 13, the second channel, the third channel 990 and the air outlet 983 in sequence.

[0074] Optionally, the axial direction of the second channel is parallel to the axial direction of the cylinder 94 ; the axial direction of the third channel 990 is parallel to the axial direction of the upper flange 99 .

[0075] In the present application, the lower end of the capillary structure 20 in the first oil guide hole 111 extends to the bottom of the oil pool 91 so that the oil at the bottom of the oil pool 91 can also be used for lubrication; in this way, the oil in the oil pool 91 can be used for lubrication as much as possible, which not only ensures the lubrication effect on the compressor, but also avoids or reduces the waste of oil, and at the same time reduces the amount of oil injection, which is conducive to saving oil costs.

[0076] When the oil in the oil pool 91 is drawn upward, the oil in the oil pool 91 is usually in a vortex shape, so the oil in the middle position of the oil pool 91 is at a relatively low position, and the middle position of the oil pool 91 here is relative to the outer periphery of the oil pool 91. In the present application, relative to the outer periphery of the flange body 10, the first oil guide hole 111 is arranged close to the central axis of the flange body 10, so that the lower end of the capillary structure 20 in the first oil guide hole 111 extends into the middle position of the oil pool 91, so that the oil in the middle position of the oil pool 91 can also be used for lubrication; in this way, the oil in the oil pool 91 can be used for lubrication as much as possible, which not only ensures the lubrication effect on the compressor, but also avoids or reduces the waste of oil, and at the same time reduces the injection amount of oil, which is conducive to saving oil costs.

[0077] Optionally, there are multiple first oil guide holes 111 , and the multiple first oil guide holes 111 are arranged around the central axis of the flange body 10 .

[0078] In the present application, the flange body 10 includes a middle portion 101 and a side portion 102, and the side portion 102 is arranged around the middle portion 101; the upper end surface of the middle portion 101 and the upper end surface of the side portion 102 are located on the same plane and together form the upper end surface of the flange body 10; the lower end surface of the middle portion 101 is located on the side of the lower end surface of the side portion 102 away from the upper end surface of the flange body 10; that is, the axial height of the middle portion 101 is greater than the axial height of the side portion 102.

[0079] Specifically, the first oil guide hole 111 is arranged on the middle part 101, and the upper end and lower end of the first oil guide hole 111 extend to the upper end surface and lower end surface of the middle part 101 respectively; the second oil guide hole 112 is arranged on the side part 102, and the upper end and lower end of the second oil guide hole 112 extend to the upper end surface and lower end surface of the side part 102 respectively.

[0080] Specifically, the oil storage space 951 is a space between the mounting member 95 and the side portion 102 .

[0081] Optionally, the oil retention groove 12 is disposed on the side portion 102 ; the first channel 13 is disposed on the side portion 102 ; and the exhaust channel 14 is disposed on the side portion 102 .

[0082] Optionally, the cross section of the first oil guiding hole 111 perpendicular to the axial direction thereof is circular or polygonal; for example, the cross section of the first oil guiding hole 111 perpendicular to the axial direction thereof is rectangular or rhombus.

[0083] Optionally, the cross section of the second oil guiding hole 112 perpendicular to the axial direction thereof is circular or polygonal; for example, the cross section of the second oil guiding hole 112 perpendicular to the axial direction thereof is rectangular or rhombus-shaped.

[0084] Specifically, the middle portion 101 includes a first portion and a second portion which are distributed along the axial direction of the flange body 10 and are interconnected; the upper end face and the lower end face of the first portion are flush with the upper end face and the lower end face of the side portion 102 respectively, and the second portion is a portion protruding from the side portion 102.

[0085] If the aperture of the first oil guide hole 111 is too large, the strength of the second part may be reduced. Therefore, on the premise of ensuring the strength of the second part, a small number of first oil guide holes 111 with larger apertures or multiple first oil guide holes 111 with smaller apertures may be opened to meet the oil delivery demand and ensure the strength of the second part.

[0086] Optionally, the cross section of the first oil guiding hole 111 perpendicular to the axial direction thereof gradually increases from the upper end to the lower end of the first oil guiding hole 111 to improve the oil conveying efficiency.

[0087] Optionally, the cross section of the first oil guiding hole 111 parallel to the axial direction thereof is trapezoidal, and the longer bottom side of the cross section of the first oil guiding hole 111 parallel to the axial direction thereof is located below the shorter bottom side.

[0088] Optionally, the cross section of the second oil guiding hole 112 perpendicular to the axial direction thereof gradually increases from the upper end to the lower end of the second oil guiding hole 112 to improve the oil conveying efficiency.

[0089] Optionally, the cross section of the second oil guiding hole 112 parallel to the axial direction thereof is trapezoidal, and the longer bottom side of the cross section of the second oil guiding hole 112 parallel to the axial direction thereof is located below the shorter bottom side.

[0090] If the diameter of the upper end of the oil guide hole 11 is too large, the sealing surface between the upper end surface of the flange body 10 and the roller 92 will be too small, thereby increasing the risk of refrigerant leakage; therefore, the diameter of the upper end of the oil guide hole 11 should not be too large.

[0091] In the present application, an oil return channel 15 is also provided on the flange body 10 .

[0092] The present invention also provides a compressor, such as Figures 1 to 5 As shown, it comprises the above-mentioned lower flange assembly 100. Optionally, the compressor is a rotary compressor.

[0093] Specifically, the compressor also includes a motor 96, an oil pool 91, a roller 92, a vane 93, a cylinder 94, a mounting part 95, a crankshaft 97, an air inlet 981 located at the upper part of the compressor, a low-pressure chamber 982, an upper flange 99, an air intake 991, and an upper muffler 992.

[0094] When the compressor is running, the low-pressure gas enters the low-pressure chamber 982 from the air inlet 981, then enters the space between the upper muffler 992 and the upper flange 99 through the air inlet 993 on the upper muffler 992, and then enters the suction chamber of the compressor from the air intake 991 on the upper flange 99. The crankshaft 97 drives the roller 92 to rotate, and the low-pressure gas is discharged from the compression chamber after being compressed; the compressed gas in the compression chamber is discharged into the exhaust channel 14, and then flows into the space between the mounting part 95 and the flange body 10, and then is discharged from the compressor through the first channel 13, the second channel, the third channel 990 and the air outlet 983 in sequence.

[0095] The oil carried in the gas flowing into the space between the mounting member 95 and the flange body 10 is deposited and gathered on the mounting member 95 to form a high-pressure oil pool 952; the lower end of the capillary structure 20 in the second oil guide hole 112 is immersed in the high-pressure oil pool 952, and under the capillary action, the oil in the high-pressure oil pool 952 moves along the capillary structure 20 in the second oil guide hole 112 to the upper end of the capillary structure 20, and then flows into the oil retention groove 12; as the compressor runs stably, the oil in the oil retention groove 12 is continuously transported to the gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and the gap between the upper end surface of the flange body 10 and the lower end surface of the sliding vane 93, which not only solves the problem of liquid accumulation in the high-pressure cavity between the mounting member 95 and the flange body 10, but also realizes lubrication between components.

[0096] When the compressor is stationary, the oil in the oil pool 91 is transported to the gap on the upper end surface of the flange body 10 through the capillary structure 20 in the first oil guide hole 111; oil is stored in the oil retention groove 12. At the moment of compressor startup, since there is a certain amount of oil in the gap on the upper end surface of the flange body 10, and the oil in the oil retention groove 12 can flow into the gap on the upper end surface of the flange body 10, contact friction due to lack of oil can be avoided at the moment of compressor startup.

[0097] Regardless of whether the compressor is stationary or running, the oil in the oil pool 91 can be transported to the gap on the upper end surface of the flange body 10 through the capillary structure 20 in the first oil guide hole 111, thereby achieving uninterrupted lubrication.

[0098] In addition, the outer circumferential surface of the roller 92 is on the high-pressure side compared to its inner circumferential surface, so relying on the high and low pressure difference, it is convenient to transport the oil in the oil retention groove 12 to the gap between the upper end surface of the flange body 10 and the lower end surface of the roller 92, and the gap between the upper end surface of the flange body 10 and the lower end surface of the slide 93.

[0099] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0100] In the lower flange assembly 100 provided by the present invention, the lower flange assembly 100 includes a flange body 10, on which an oil guide hole 11 is arranged, and the upper and lower ends of the oil guide hole 11 extend to the upper end surface and the lower end surface of the flange body 10 respectively; the lower flange assembly 100 also includes a capillary structure 20, which is arranged in the oil guide hole 11 and extends along the axial direction of the oil guide hole 11.

[0101] The lower end of the capillary structure 20 extends from the lower end of the oil guide hole 11 and extends into the oil storage structure located below the flange body 10, so that the oil in the oil storage structure moves from the lower end of the capillary structure 20 along the capillary structure 20 to the upper end of the capillary structure 20 under the capillary action.

[0102] The upper end of the capillary structure 20 extends to the upper end of the oil guide hole 11; the oil moved to the upper end of the capillary structure 20 can flow into the gap on the upper end surface of the flange body 10; in this way, a good lubrication effect can be achieved between the flange body 10 and the roller 92, and between the flange body 10 and the sliding plate 93.

[0103] The use of the lower flange assembly 100 of the present application: 1. Solve the lubrication problem of parts and components, that is, it can reduce the amount of oil injection (i.e., oil injection amount) while ensuring the lubrication conditions, thereby effectively reducing the overall oil discharge of the compressor; 2. Improve the problem of oil pumping difficulties in low back pressure compressors; 3. Continuously provide oil to the gap on the upper end surface of the flange body 10 to prevent contact friction.

[0104] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0105] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lower flange assembly, used in a compressor, characterized in that: The lower flange assembly comprises: A flange body (10), wherein the flange body (10) is provided with an oil guide hole (11), and two ends of the oil guide hole (11) respectively extend to the upper end surface and the lower end surface of the flange body (10); A capillary structure (20) is arranged in the oil guide hole (11) and extends along the axial direction of the oil guide hole (11); The lower end of the capillary structure (20) extends from the lower end of the oil guide hole (11) and extends into the oil storage structure located below the flange body (10), so that the oil in the oil storage structure moves from the lower end of the capillary structure (20) along the capillary structure (20) to the upper end of the capillary structure (20); The upper end of the capillary structure (20) extends to the upper end of the oil guide hole (11), so that the oil moved to the upper end of the capillary structure (20) flows into the gap on the upper end surface of the flange body (10); the gap on the upper end surface of the flange body (10) includes the gap between the upper end surface of the flange body (10) and the lower end surface of the roller (92) of the compressor, and the gap between the upper end surface of the flange body (10) and the lower end surface of the sliding vane (93) of the compressor.

2. The lower flange assembly according to claim 1, characterized in that: There are a plurality of oil guide holes (11), each of which is provided with a capillary structure (20); the plurality of oil guide holes (11) include a first oil guide hole (111) and a second oil guide hole (112); the oil storage structure includes: An oil pool (91), wherein the lower end of the capillary structure (20) in the first oil guide hole (111) extends into the oil pool (91); An oil storage space (951) is provided, wherein the mounting member (95) of the compressor is connected to the lower end surface of the flange body (10), and the oil storage space (951) is formed between the mounting member (95) and the flange body (10); an exhaust channel (14) is provided on the flange body (10), the upper end of the exhaust channel (14) is communicated with the compression chamber of the compressor, and the lower end of the exhaust channel (14) is communicated with the oil storage space (951), so that the compressed gas in the compression chamber flows into the oil storage space (951) through the exhaust channel (14), and the oil droplets separated from the compressed gas are deposited at the bottom of the oil storage space (951); the lower end of the capillary structure (20) in the second oil guide hole (112) extends into the oil at the bottom of the oil storage space (951).

3. The lower flange assembly according to claim 2, characterized in that: The number of the first oil guide hole (111) is at least one; and / or There is at least one second oil guide hole (112).

4. The lower flange assembly according to claim 1, characterized in that: The lower flange assembly further comprises a support portion (30) having a support channel, wherein the support portion (30) is located below the flange body (10); the capillary structure (20) in the oil guide hole (11) is penetrated in the support channel, and the lower end of the capillary structure (20) extends from the lower end of the support channel to extend into the oil storage structure.

5. The lower flange assembly according to claim 1, characterized in that: The capillary structure (20) comprises a capillary tube (21) and / or a long strip structure of a capillary fiber material, the extension direction of the capillary tube (21) is the same as the extension direction of the capillary structure (20), and the extension direction of the long strip structure is the same as the extension direction of the capillary structure (20).

6. The lower flange assembly according to claim 2, characterized in that: An oil retaining groove (12) is concavely provided on the upper end surface of the flange body (10), and the oil retaining groove (12) is communicated with the second oil guide hole (112), so that the oil at the upper end of the capillary structure (20) in the second oil guide hole (112) flows into the oil retaining groove (12) and then flows into the gap on the upper end surface of the flange body (10).

7. The lower flange assembly according to claim 2, characterized in that: The lower end of the capillary structure (20) in the first oil guide hole (111) extends into the bottom of the oil pool (91); and / or Relative to the outer periphery of the flange body (10), the first oil guide hole (111) is arranged close to the central axis of the flange body (10).

8. The lower flange assembly according to claim 2, characterized in that: The flange body (10) comprises a middle portion (101) and a side portion (102), wherein the side portion (102) is arranged around the middle portion (101); the upper end surface of the middle portion (101) and the upper end surface of the side portion (102) are located on the same plane and together form the upper end surface of the flange body (10); the lower end surface of the middle portion (101) is located on a side of the lower end surface of the side portion (102) away from the upper end surface of the flange body (10); The first oil guide hole (111) is arranged on the middle portion (101), and the second oil guide hole (112) is arranged on the side portion (102).

9. The lower flange assembly according to claim 2, characterized in that: The flange body (10) is provided with a first channel (13), and the two ends of the first channel (13) extend to the upper end surface and the lower end surface of the flange body (10) respectively; the lower end of the first channel (13) is connected to the oil storage space (951), and the upper end of the first channel (13) is connected to the air outlet (983) of the compressor, so that the compressed gas flowing into the oil storage space (951) is discharged after passing through the first channel (13) and the air outlet (983) in sequence.

10. A compressor, characterized in that: The invention comprises the lower flange assembly according to any one of claims 1 to 9.

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