Air conditioner, compressor and sound attenuation structure

Abstract

This application relates to the field of air conditioning equipment, and particularly to an air conditioner, a compressor, and a silencer structure. The silencer structure includes a flange and a silencer. The flange includes a flange portion and a neck protruding downwards opposite the flange portion. A shaft hole is formed through the flange from the upper end face of the flange portion to the lower end face of the neck. The silencer includes an annular plate and an upwardly protruding structure from the inner circumference of the annular plate. An inner hole is formed through the upper protruding structure. The silencer is fitted onto the neck through the inner hole, and a silencer cavity is formed between the upper outer circumference of the upper protruding structure, the annular plate, and the flange portion. An oil storage cavity communicating with the compressor's lubricating oil sump is formed on the side of the upper protruding structure opposite to the flange portion. The silencer structure provided in this application, without changing the axial dimension of the flange, assembles a silencer with an upwardly protruding structure with the flange, ensuring and improving the silencer effect while increasing the oil storage capacity of the compressor's lower cavity.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment, and more particularly to an air conditioner, a compressor, and a noise reduction structure. Background Technology

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas; it is the heart of a refrigeration system.

[0003] Compressors often produce significant noise during operation. To reduce this noise, silencers, a common noise reduction method for compressors, play a crucial role, achieving noise reduction through the refraction and reflection of exhaust gas. Lower silencers are commonly used to reduce noise from the lower flange exhaust structure. However, existing lower silencers, due to their lower placement within the compressor and their sealed structure, occupy a portion of the compressor's lower cavity, leading to a reduction in the amount of lubricating oil in the lower lubrication sump. For large rotary compressors, the numerous connecting pipes in the air conditioning system result in a significant amount of refrigerant oil adhering to these pipes during system operation, easily causing insufficient lubrication in the compressor's lubrication sump. Summary of the Invention

[0004] This application provides an air conditioner, a compressor, and a muffler structure to solve the problem of insufficient oil storage in the compressor caused by the muffler encroaching on the oil storage space in the lower chamber of the compressor. While ensuring and improving the muffler effect, it increases the oil storage capacity in the lower chamber of the compressor.

[0005] In a first aspect, this application provides a noise reduction structure, comprising:

[0006] A flange includes a flange portion and a neck that protrudes downward relative to the flange portion, wherein a shaft hole is provided through the flange from the upper end face of the flange portion to the lower end face of the neck.

[0007] A muffler includes an annular plate and an upwardly projecting structure extending from the inner circumference of the annular plate, wherein the upwardly projecting structure has an internal hole extending through it.

[0008] The muffler is sleeved onto the neck through the inner hole, and forms a muffler cavity between the upper outer periphery of the convex structure, the annular plate, and the flange portion, and forms an oil storage cavity on the side of the convex structure opposite to the flange portion.

[0009] According to the above technical means, the flange and the muffler are assembled by means of the neck of the flange and the inner hole of the upper convex structure. Without changing the distance between the upper end face and the lower end face of the flange, that is, the upper end face of the flange and the lower end face of the neck, the muffler's upper convex structure forms a muffler cavity and an oil storage cavity on the upper and lower sides of the upper convex structure, respectively. This not only does not encroach on the oil storage space of the lower cavity of the compressor, but also increases the oil storage capacity of the lower cavity of the compressor through the oil storage cavity.

[0010] In some embodiments, the convex structure includes an convex body and silencing flaps and / or silencing steps protruding from the outer periphery of the convex body, with the silencing flaps and silencing steps arranged alternately in the circumferential direction.

[0011] Based on the above technical means, the setting of the silencing flap and silencing step ensures and improves the silencing effect of the silencing cavity, while increasing the oil storage capacity of the oil storage cavity.

[0012] In some embodiments, the noise-absorbing flaps are symmetrically arranged on both sides of the noise-absorbing step.

[0013] Based on the aforementioned technical means, multiple sets of silencer flaps are set to further improve the silencer effect and increase the oil storage capacity of the oil reservoir.

[0014] In some embodiments, the outer periphery of the flange portion is provided with a skirt extending in the same direction as the neck, and an annular plate connects to the skirt.

[0015] Based on the above technical means, the flange is connected to the annular plate of the silencer through the skirt, which ensures the sealing of the silencer cavity.

[0016] In some embodiments, a first fixing hole is provided on the bottom end face of the skirt, and a second fixing hole is provided on the annular plate. The device also includes a fastener that passes through the first fixing hole, the second fixing hole, and the annular plate and the skirt for fixed connection.

[0017] Based on the above technical means, the annular plate is connected to the skirt of the flange by fasteners, which improves the convenience of assembly.

[0018] In some embodiments, a connecting flange is provided on the outer periphery of the annular plate, and the connecting flange is connected to the flange portion.

[0019] Based on the above technical means, the connection and fixation between the muffler and the flange part of the flange are achieved by means of connecting flange.

[0020] In some embodiments, the connecting flange includes a first flange extending in the same direction as the convex structure, and a second flange connecting the first flange and extending radially outward along the first flange, the second flange connecting the flange portion.

[0021] Based on the above technical means, the connecting flange is provided with a first flange and a second flange. The second flange is used to connect with the flange part, thus ensuring the sealing of the silencing cavity.

[0022] In some embodiments, a second muffler is also included, the second muffler including a second annular plate and a second upwardly projecting structure protruding from the inner periphery of the second annular plate, the second upwardly projecting structure having a second inner hole through it;

[0023] The second muffler is sleeved on the neck through the second inner hole. The outer periphery of the neck, the second upper convex structure and the upper convex structure together form a second muffler cavity. The side of the second upper convex structure away from the upper convex structure forms an oil storage cavity.

[0024] The convex structure has a sound-absorbing channel connecting the sound-absorbing cavity and the second sound-absorbing cavity.

[0025] Based on the above technical means, the setting of the second silencer, the second silencer cavity and the silencer channel further improves the silencer effect of the silencer structure, while the setting of the oil storage cavity ensures that the oil storage capacity of the lower cavity of the compressor is increased to a certain extent.

[0026] In some embodiments, the outer periphery of the neck is provided with a stop sealing structure for locking the inner hole. The stop sealing structure is provided with a sealing surface that fits the top end of the upper convex structure and seals the connection gap between the inner hole and the neck. The radial overlap dimension between the sealing surface and the upper convex structure is d, where d≥5mm.

[0027] Based on the above technical means, the setting of the stop sealing structure and sealing surface ensures the sealing at the connection between the inner hole of the upper convex structure and the neck of the flange.

[0028] Secondly, this application provides a compressor that uses the silencing structure provided by any of the above claims.

[0029] In some embodiments, the compressor includes an upper cover assembly, a housing assembly, a drive motor, a crankshaft, an upper flange assembly, a first cylinder, a partition, a second cylinder, a lower flange assembly, and a lower cover assembly arranged sequentially along the axial direction.

[0030] The lower flange assembly includes a silencing structure, and a lubricating oil sump is formed between the lower cover assembly and the silencing structure. The crankshaft is connected to the drive motor and passes through the upper flange assembly, the first cylinder, the partition, the second cylinder, the lower flange assembly in sequence and extends to the lubricating oil sump.

[0031] According to the above technical means, the noise reduction structure is assembled with the crankshaft of the compressor through the shaft hole of the neck. The oil storage chamber, together with the lubricating oil pool in the lower chamber of the compressor, stores the lubricating oil for lubricating the crankshaft, ensuring the oil storage capacity in the lower chamber of the compressor. Moreover, the noise reduction structure can effectively reduce the noise of the compressor.

[0032] Thirdly, this application provides an air conditioner that uses the compressor provided in the above embodiments.

[0033] Compared with the prior art, the technical solution provided in this application has the following advantages: By machining the flange to form a flange portion and a neck protruding downward relative to the flange portion, a shaft hole is opened through the upper end face of the flange portion from the lower end face of the neck, ensuring that the crankshaft can pass through and extend to the lubricating oil pool in the lower cavity of the compressor for lubrication; the muffler is assembled with the neck of the flange by means of the inner hole of the upward convex structure, and a muffler cavity and an oil storage cavity are formed on the upper and lower sides of the upward convex structure. The entire muffler structure is an improvement on the original flange, without changing the distance between the upper and lower end faces of the flange, so that the entire muffler structure not only does not additionally occupy the oil storage space in the lower cavity of the compressor, but also increases the oil storage capacity in the lower cavity of the compressor through the concave oil storage cavity. At the same time, the setting of the muffler cavity ensures and improves the noise reduction effect of the compressor. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0037] Figure 1 This is a schematic diagram of a noise reduction structure provided in one embodiment of this application;

[0038] Figure 2 for Figure 1 Longitudinal section view;

[0039] Figure 3 for Figure 1 Enlarged view of part A;

[0040] Figure 4 for Figure 1 Schematic diagram of the middle silencer;

[0041] Figure 5 A longitudinal sectional view of a noise-absorbing structure provided in another embodiment of this application;

[0042] Figure 6 A longitudinal sectional view of a noise-absorbing structure provided in another embodiment of this application;

[0043] Figure 7 A comparison diagram showing the noise reduction effect of the noise reduction structure provided in the embodiments of this application;

[0044] Figure 8 This is an assembly diagram of the compressor provided in an embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1-Upper cover assembly; 2-Housing assembly; 3-Drive motor; 4-Crankshaft; 5-Upper flange assembly; 6-First cylinder; 7-Baffle; 8-Second cylinder; 9-Lower flange assembly; 10-Lower cover assembly; 11-Dispenser;

[0047] 91-Flange; 911-Flange section; 9111-Exhaust vent; 912-Neck; 913-Skirt; 914-Standing seal structure;

[0048] 92-Silencer; 921-Annular plate; 922-Upper convex structure; 923-Silencer flap; 924-Silencer step; 925-Inner hole; 926-First flange; 927-Second flange; 928-Fastener; 929-Silencer cavity; 930-Silencer channel;

[0049] 93-Second silencer; 931-Second annular plate; 932-Second convex structure; 933-Second silencer cavity; 934-Oil reservoir. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0052] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0053] To address the technical problem of insufficient lubricating oil storage in the lower chamber of compressors in existing technologies, this application provides a compressor and a noise reduction structure that can increase the amount of lubricating oil stored in the lower chamber of the compressor, thereby ensuring and improving the noise reduction of the compressor.

[0054] See Figures 1 to 4 This application provides a noise reduction structure, mainly comprising a flange 91 and a muffler 92. Unlike existing flanges, this application processes the flange 91 to form a flange portion 911 and a neck 912 that protrudes downwards from the flange portion 911. The neck 912 is generally a hollow shaft-shaped structure. A shaft hole in the flange 91 through which the crankshaft 4 of the compressor passes extends from the upper end face of the flange to the lower end face of the neck 912. In this embodiment, the axial distance between the upper and lower end faces of the flange 91 is the same as the axial distance between the upper end face of the flange portion 911 and the lower end face of the neck 912. This distance is not changed compared to the axial distance between the upper and lower end faces of existing flanges 91, meaning it does not increase the space occupied in the lower cavity of the compressor.

[0055] The silencer 92 adopts a combination of an annular plate 921 and an upwardly protruding structure 922. The upwardly protruding structure 922 protrudes upward from the inner circumference of the annular plate, and an inner hole 925 is formed through the upper circumference of the upper circumference 922. The size of the inner hole 925 is adapted to the size of the neck 912 of the flange 91. The silencer 92 is "hidden" in the axial space of the flange 91 by fitting the inner hole 925 and the neck 912 of the flange 91. In this way, the upper part and outer circumference of the upwardly protruding structure 922, the lower part of the flange 911, and the outer circumference of the neck 912 enclose a silencing cavity 929, which is used to reduce the noise of the compressor, ensuring and improving the noise reduction effect. Between the lower inner circumference of the convex structure 922 on the side opposite to the flange portion 911 and the outer circumference of the neck 912, an inverted oil storage chamber 934 is formed. This oil storage chamber 934 is connected to the lubricating oil pool in the lower chamber of the compressor, which can increase the amount of lubricating oil stored and effectively avoid the problem of insufficient lubricating oil in the lower chamber of the compressor.

[0056] It should be noted that the other structures of the flange 91, such as the exhaust passage and exhaust groove, are designed with reference to the prior art, and will not be described in detail here. For example, the flange portion 911 is provided with an exhaust receiving groove 9111, which is used to house the exhaust structure of the compressor. The distance from the bottom of the exhaust receiving groove 9111 to the upper end face of the flange 91 (i.e., the flange plate portion 911) is H1, and the distance from the top end face of the convex structure 922 to the lower end face of the flange 91 (i.e., its neck 912) is H2. H1 + H2 < H, where H is the axial distance from the upper end face to the lower end face of the existing flange, and is also equal to the axial distance between the upper end face of the flange plate portion 911 and the lower end face of the neck 912 of the flange 91 of this application. This allows the muffler structure of this application to place the muffler 92 in the axial space of the flange 91 without increasing the space occupied in the lower cavity of the compressor. This is achieved by using the structure of the flange plate portion 911 of the flange 91 in combination with the neck 912, the convex structure 922 of the muffler 92 and the annular plate 921. At the same time, the concave oil storage chamber 934 is connected to the lubricating oil pool in the lower cavity of the compressor, increasing the oil storage capacity of the lower cavity of the compressor.

[0057] Continue reading Figure 2 and Figure 4One embodiment of this application provides a muffler 92, whose convex structure 922 includes an convex main body and silencing flaps 923 and silencing steps 924 located on the outer periphery of the convex main body. The upper end face of the convex structure 922 is generally a plane parallel to the annular plate 921. The silencing flaps 923 and silencing steps 924 are generally set at the same height as the convex structure 922, and both the silencing flaps 923 and silencing steps 924 extend convexly from the outer periphery of the convex main body. At least one set of silencing flaps 923 and silencing steps 924 is provided, and noise reduction is achieved by reflecting and canceling sound waves through their irregular surfaces. The convex arrangement of the silencing flaps 923 and silencing steps 924 further increases the volume of the oil storage cavity 934.

[0058] In some embodiments, two sets of silencing flaps 923 and one set of silencing steps 924 are provided. The two sets of silencing flaps 923 are generally symmetrically arranged about the silencing steps 924, which improves the silencing effect and further increases the volume of the oil storage chamber 934. It is understood that the number and position of the silencing flaps 923 and silencing steps 924 can be flexibly set according to the operation and noise reduction requirements, and are not limited to the form shown in the figure. The convex structure 922 can also be provided with other silencing structures as needed, such as silencing grooves, silencing holes or silencing plates, etc. The upper surface of the convex structure 922 can also be coated with sound-absorbing material.

[0059] The silencing structure provided in this application not only does not encroach on the oil storage space in the lower chamber of the compressor, but also increases the oil storage capacity in the lower chamber by forming a concave oil storage chamber 934 that communicates with the lubricating oil sump through the convex structure 922 of the silencing structure. At the same time, the silencing structure provided in this application ensures improved noise reduction performance of the compressor; the specific noise reduction effect is described in [reference needed]. Figure 7 Compared with existing silencers, the solid line represents the noise reduction effect of the noise reduction structure of this application, and the dashed line represents the noise reduction effect of the prior art silencer. The horizontal axis represents the sound wave frequency, and the vertical axis represents the noise reduction effect. As can be seen from the figure, the noise reduction structure of this application significantly improves the noise reduction effect on sound waves with frequencies of 300-700 Hz and 900-1300 Hz.

[0060] To ensure the airtightness of the silencing cavity 929, this application provides various assembly structures for the silencer 92 and flange 91. The silencing structures will be described in more detail below with different assembly methods.

[0061] Figure 2 and Figure 4In the illustrated embodiment, the flange 91 further includes a skirt 913 that connects to the outer periphery of the flange portion 911 and extends in the same direction as the neck 912. The skirt 913 is annular and forms a relatively closed silencing cavity 929 with the flange portion 911, the outer periphery of the neck 912, the upper part and outer periphery of the upward-convex structure 922, and the annular plate 921. The annular plate 921 abuts against the bottom end of the skirt 913 and is connected to the skirt 913. That is, in this embodiment, the flange 91 forms an annular structure for the installation of the silencer 92 by opening a portion from its lower end face between the neck 912 and the skirt 913.

[0062] like Figure 1 and Figure 2 As shown, in some embodiments, to facilitate the assembly of the muffler 92 and the flange 91, a plurality of first fixing holes are formed circumferentially on the bottom end face of the skirt 913, and a second fixing hole corresponding to the number and position of the first fixing holes is formed circumferentially on the annular plate 921. The muffler 92 and the flange 91 are connected and fixed by means of fasteners 928 passing through the second fixing holes of the annular plate 921 and the first fixing holes of the skirt 913. Specifically, the first fixing holes are threaded holes, and the second fixing holes can be threaded holes or through holes without internal threads. The fasteners 928 are bolts. An annular sealing gasket can be added between the mating surfaces of the annular plate 921 and the skirt 913 as needed.

[0063] Obviously, the connection method between the annular plate 921 and the skirt 913 is not limited to the connection method of the fastener 928 and the fixing hole. An annular connecting flange can also be set vertically on the outer periphery of the annular plate 921. The connecting flange and the skirt 913 extend in the same direction. The outer diameter of the connecting flange is equal to the inner diameter of the skirt 913, or the inner diameter of the connecting flange is equal to the outer diameter of the skirt 913. Threads are provided between the connecting mating surfaces of the connecting flange and the skirt 913. The annular plate 921 and the skirt 913 are screwed together by means of the threads between the connecting flange and the skirt 913.

[0064] The above-described structure ensures a sealed connection between the outer periphery of the annular plate 921 and the outer periphery of the flange portion 911, i.e., the outer periphery of the silencing cavity 929. The sealed connection between the convex structure 922 and the neck 912 is described in detail below. Figure 2 and Figure 3The flange 91 provided in this embodiment has a stop sealing structure 914 protruding radially from the outer periphery of the upper part of its neck 912. When the upper protruding structure 922 is sleeved on the neck 912 through the inner hole 925, the upper end face of the upper protruding structure 922 abuts against the stop sealing structure 914, and the stop sealing structure 914 locks the inner hole 925. The lower end face of the stop sealing structure 914 serves as a sealing surface, fitting against the top of the upper protruding structure 922 to seal the connection gap between the inner hole 925 and the neck 912. The sealing surface and the upper end face of the upper protruding structure 922 have a certain radial overlap dimension, which is d. To ensure the reliability of the seal, the dimension d is greater than or equal to 5mm.

[0065] See Figure 5 In another embodiment provided in this application, the flange 91 includes only a flange portion 911 and a neck 912 that protrudes downward from the center of the flange portion 911. In this embodiment, the flange 91 does not have a skirt 913. To ensure the sealing of the silencing cavity 929, the annular plate 921 has a connecting flange on its outer periphery, which connects to the flange portion 911. In this embodiment, the connecting flange can be configured as a structure including a first flange 926 and a second flange 927. The first flange 926 extends in the same direction as the upper convex structure 922, that is, the first flange 926 extends approximately along the axial direction of the flange 91. At the same time, the second flange 927 is folded outward from the end of the first flange 926 away from the annular plate 921. The second flange 927 is approximately parallel to the lower end face of the annular plate 921 and the flange portion 911. Fixing holes are correspondingly provided on the periphery of the second flange 927 and the flange portion 911. The silencer 92 and the flange 91 are connected through fasteners 928, the second flange 927, and the fixing holes of the flange portion 911. The specific structure of the connecting flange can also be flexibly adjusted according to assembly needs.

[0066] Based on the above embodiments, in order to further improve the noise reduction performance of the noise reduction structure, the noise reduction structure provided in this application embodiment also includes a second muffler 93.

[0067] See Figure 6Similar to the structure of muffler 92, the second muffler 93 includes a second annular plate 931 and a second upwardly protruding structure 932. The second upwardly protruding structure 932 connects to the inner circumference of the second annular plate 931 and protrudes upward relative to the second annular plate 931. The second upwardly protruding structure 932 has a second inner hole extending through it. The dimensions of the second annular plate 931 are comparable to those of the annular plate 921; the upward protrusion dimension of the second upwardly protruding structure 932 along the axial direction of the flange 91 is smaller than that of the upwardly protruding structure 922, and its radial dimension is also smaller than that of the upwardly protruding structure 922; the dimensions of the second inner hole are comparable to those of the inner hole 925. The second muffler 93 is connected and fixed to the flange 91 by fitting the second inner hole onto the neck 912 and by overlapping the second annular plate 931 with the annular plate 921. To ensure a sealed connection between the inner hole 925 and the neck 912, and between the second inner hole and the neck 912, sealant can be applied to the connection points after fitting the inner hole 925 and the neck 912, and after fitting the second inner hole and the neck 912.

[0068] At this time, a silencing cavity 929 is formed between the upper outer periphery of the convex structure 922, the outer periphery of the neck 912, the upper part of the first annular plate 921, and the lower part of the flange portion 911; a second silencing cavity 933 is formed between the lower inner periphery of the convex structure 922, the upper outer periphery of the second convex structure 932, and the outer periphery of the annular plate 921, and a silencing channel 930 is opened in the convex structure 922 to connect the first silencing cavity 929 and the second silencing cavity 933. An oil reservoir 934 is formed between the outer periphery of the neck 912 and the lower inner periphery of the second convex structure 932, and is connected to the lubricating oil sump in the lower cavity of the compressor.

[0069] In this embodiment, although the volume of the oil storage chamber 934 is reduced, the concave shape of the oil storage chamber 934 still increases the oil storage capacity of the lower compressor chamber to some extent. Furthermore, the double-layered design of the silencing chamber 929 and the second silencing chamber 933 further enhances the compressor's noise reduction performance. The noise reduction structure of the second convex structure 932 is set with reference to the convex structure 922, and will not be described further here.

[0070] This application also provides a compressor that uses the silencing structure provided in any of the above embodiments, and other parts of the compressor can be referred to the prior art.

[0071] See Figure 8 In some embodiments, the compressor includes an upper cover assembly 1, a housing assembly 2, a drive motor 3, a crankshaft 4, an upper flange assembly 5, a first cylinder 6, a partition 7, a second cylinder 8, a lower flange assembly 9, a lower cover assembly 10, and a distributor 11. The upper cover assembly 1, housing assembly 2, drive motor 3, crankshaft 4, upper flange assembly 5, first cylinder 6, partition 7, second cylinder 8, lower flange assembly 9, and lower cover assembly 10 are arranged sequentially along the axial direction, and the distributor 11 is connected to the side of the second cylinder 8.

[0072] The lower flange assembly 9 includes the aforementioned silencing structure and a threaded fastener that connects and fixes the silencing structure relative to the second cylinder 8. The crankshaft 4 is connected to the drive motor 3 and passes sequentially through the upper flange assembly 5, the first cylinder 6, the partition 7, and the second cylinder 8. The end of the crankshaft 4 extends through the lower flange assembly 9 into the lower cover assembly 10. A lubricating oil pool is formed between the lower cover assembly 10 and the lower flange assembly 9. The oil storage chamber 934 at the bottom of the silencing structure is connected to the lubricating oil pool, increasing the oil storage capacity of the lower chamber of the compressor. The crankshaft 4 is lubricated by the lubricating oil stored in the lubricating oil pool and the oil storage chamber 934.

[0073] This application also provides an air conditioner, including an evaporator, a condenser, a throttling component, a reversing valve assembly, connecting pipes, and the compressor disclosed in the above embodiments. The specific connection structure and other parts of the air conditioner can be referred to the prior art, and will not be described in detail here.

[0074] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0075] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sound attenuating structure, characterized by, include: A flange includes a flange portion and a neck that protrudes downward relative to the flange portion, wherein a shaft hole is provided through the flange from the upper end face of the flange portion to the lower end face of the neck. A muffler includes an annular plate and an upwardly projecting structure extending from the inner circumference of the annular plate, wherein the upwardly projecting structure has an internal hole extending through it. The silencer is sleeved on the neck through the inner hole and forms a silencer cavity between the upper outer periphery of the convex structure, the annular plate and the flange portion; It also includes a second muffler, which includes a second annular plate and a second upward protrusion structure protruding upward from the inner circumference of the second annular plate, wherein the second upward protrusion structure has a second inner hole through it. The second muffler is sleeved on the neck through the second inner hole. The outer periphery of the neck, the second upper convex structure and the upper convex structure together form a second muffler cavity. The side of the second upper convex structure opposite to the upper convex structure forms an oil storage cavity. The convex structure has a sound-absorbing channel connecting the sound-absorbing cavity and the second sound-absorbing cavity.

2. The sound attenuating structure of claim 1, wherein, The convex structure includes an upper convex body and a sound-absorbing flap and / or a sound-absorbing step protruding from the outer periphery of the upper convex body, wherein the sound-absorbing flap and the sound-absorbing step are arranged alternately in the circumferential direction.

3. The sound attenuating structure of claim 2, wherein, The noise-absorbing flaps are symmetrically arranged on both sides of the noise-absorbing step.

4. The sound attenuating structure of claim 1, wherein, The outer periphery of the flange portion is provided with a skirt extending in the same direction as the neck, and the annular plate connects to the skirt.

5. The noise-absorbing structure according to claim 4, characterized in that, The bottom end face of the skirt has a first fixing hole, the annular plate has a second fixing hole, and the skirt also includes a fastener that passes through the first fixing hole and the second fixing hole to fix the annular plate and the skirt.

6. The noise-absorbing structure according to claim 1, characterized in that, The outer periphery of the annular plate is provided with a connecting flange, which is connected to the flange portion.

7. The noise-absorbing structure according to claim 6, characterized in that, The connecting flange includes a first flange extending in the same direction as the convex structure, and a second flange connecting the first flange and extending radially outward along the first flange, wherein the second flange connects to the flange portion.

8. The noise-absorbing structure according to claim 1, characterized in that, The outer periphery of the neck is provided with a stop sealing structure for locking the inner hole. The stop sealing structure has a sealing surface that fits the top end of the upper convex structure and seals the connection gap between the inner hole and the neck. The radial overlap dimension between the sealing surface and the upper convex structure is d, where d≥5mm.

9. A compressor, characterized in that, The noise-reducing structure according to any one of claims 1-8 is applied.

10. The compressor according to claim 9, characterized in that, The compressor includes an upper cover assembly, a housing assembly, a drive motor, a crankshaft, an upper flange assembly, a first cylinder, a partition plate, a second cylinder, a lower flange assembly, and a lower cover assembly arranged sequentially along the axial direction. The lower flange assembly includes the silencing structure, and a lubricating oil pool is formed between the lower cover assembly and the silencing structure. The crankshaft is connected to the drive motor and passes through the upper flange assembly, the first cylinder, the partition plate, the second cylinder, the lower flange assembly in sequence and extends to the lubricating oil pool.

11. An air conditioner, characterized in that, The compressor described in claim 9 or 10 is used.

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