Silencing structure and compressor

Abstract

A silencing structure and a compressor. The silencing structure comprises a body part and a communicating part, wherein the body part has a silencing cavity, and an air suction port and an air outlet which are in communication with the silencing cavity; and the communicating part is arranged in the silencing cavity and comprises an air channel, an air intake end and an air output end of the air channel both being in communication with the silencing cavity, the air intake end of the communicating part being arranged towards the air suction port, and the air output end of the communicating part being arranged towards the air outlet. By means of the silencing structure, the flow resistance of an airflow can be weakened to a great extent, thereby solving the problems of the flow resistance being large, the continuity being poor, and the refrigeration performance being affected when the airflow flows through a silencer.

Description

Silencer structure and compressor

[0001] This application claims priority to Chinese patent application No. 202311554019.6 filed on November 17, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of sound insulation, and in particular to a sound insulation structure and a compressor. Background Art

[0003] As an essential household appliance in daily life, people have increasingly higher requirements for the performance of refrigerators. In addition to the important freezing capacity, the comfort of refrigerators is also one of the most critical indicators of refrigerators. Noise, as an important measurement parameter of comfort, has attracted much attention.

[0004] In the related art, in order to achieve silence, the internal pipe structure of the compressor suction silencer will adopt the method of setting up multiple silencer chambers inside the silencer. However, when the airflow flows in different silencer chambers, it will be affected by the inlet and outlet of each silencer chamber, resulting in large flow resistance and poor continuity of the airflow, which will cause poor refrigeration performance. Technical issues

[0005] The main purpose of this application is to propose a silencer structure and a compressor, aiming to solve the problem of large flow resistance and poor continuity when the airflow passes through the silencer, which affects the refrigeration performance. Technical Solutions

[0006] To achieve the above objectives, the present application proposes a sound-absorbing structure, wherein the sound-absorbing structure comprises:

[0007] A main body, the main body having a silencer cavity, and an air inlet and an air outlet connected to the silencer cavity; and

[0008] The connecting part is arranged in the silencing cavity, and the connecting part includes an air duct. The air inlet end and the air outlet end of the connecting part are both connected to the silencing cavity. The air inlet end of the connecting part is arranged toward the air intake port, and the air outlet end of the connecting part is arranged toward the air outlet port.

[0009] In one embodiment, the communication portion includes a communication pipe, the communication pipe includes a first pipe section extending along a first direction and a second pipe section extending along a second direction, and the first direction and the second direction are arranged to intersect;

[0010] The air intake port and the pipe opening of the first pipe section are arranged in alignment with each other in the first direction, and the air outlet port and the pipe opening of the second pipe section are arranged in alignment with each other in the second direction.

[0011] In one embodiment, the distance between the pipe opening of the first pipe section and the air outlet is S1, wherein 1 mm ≤ S1 ≤ 3 mm; and / or,

[0012] The distance between the pipe opening of the second pipe section and the air intake is S2, wherein 1mm≤S2≤3mm.

[0013] In one embodiment, a silencer hole is further provided on the communication portion, and the silencer hole is communicated with the airway.

[0014] In one embodiment, the connecting portion has a pipe section located in the second silencing cavity, the length of the pipe section is L, and the silencing hole is located at 1 / 3L to 2 / 3L of the pipe section.

[0015] In one embodiment, the diameter of the muffler hole is D0, where 1 mm ≤ D0 ≤ 2 mm.

[0016] In one embodiment, the silencing chamber includes a first silencing chamber and a second silencing chamber spaced apart from each other, the air inlet is communicated with the first silencing chamber, and the air outlet is communicated with the second silencing chamber;

[0017] The air inlet end of the communication portion is located in the first silencing cavity, and the air outlet end of the communication portion is located in the second silencing cavity.

[0018] In one embodiment, the main body includes a first shell and a second shell arranged opposite to each other, the second shell is formed with a groove with a notch facing the first shell, and the bottom of the groove is provided with a partition extending along the groove depth toward the notch direction to separate the groove into a first groove and a second groove arranged adjacent to each other, the first shell covers the notches of the first groove and the second groove to enclose the first silencer chamber and the second silencer chamber together with the second shell, and the connecting portion is provided through the partition.

[0019] In one embodiment, a first mounting notch is provided on a sidewall of the first groove, a second mounting notch is provided on a sidewall of the second groove, an air intake end of the communication portion is located in the first groove and faces the first mounting notch, and an air outlet end of the communication portion is located in the second groove and faces the second mounting notch;

[0020] The first housing includes a first mounting portion embedded in the first mounting notch, and a second mounting portion embedded in the second mounting notch;

[0021] The silencer structure also includes an air intake pipe passing through the first mounting portion and an air outlet pipe passing through the second mounting portion. The pipe opening of the air intake pipe toward the air intake end of the connecting portion forms the air intake port, and the pipe opening of the air intake pipe toward the air outlet end of the connecting portion forms the air outlet.

[0022] In one embodiment, a sealing groove is provided on the periphery of the notch of the groove along the groove depth direction, and the sealing groove is provided around the periphery of the notch of the groove;

[0023] A convex rib that matches the sealing groove is protruded from one side of the first shell facing the second shell, and the first shell and the second shell are sealed and matched with each other through the convex rib and the sealing groove.

[0024] In one embodiment, the main body is provided with a first through hole communicating with the first silencing cavity and the second silencing cavity; and / or,

[0025] The main body is provided with a second through hole communicating with the second muffler cavity and the outside.

[0026] In one embodiment, the diameter D1 of the first via hole is 0.5 mm ≤ D1 ≤ 1.5 mm; and / or,

[0027] The diameter D2 of the second via hole is 0.5 mm ≤ D2 ≤ 1.5 mm.

[0028] The present application further provides a compressor, the compressor including a muffler structure, the muffler structure including:

[0029] A main body, the main body having a silencer cavity, and an air inlet and an air outlet connected to the silencer cavity; and

[0030] The connecting part is arranged in the silencing cavity, and the connecting part includes an air duct. The air inlet end and the air outlet end of the connecting part are both connected to the silencing cavity. The air inlet end of the connecting part is arranged toward the air intake port, and the air outlet end of the connecting part is arranged toward the air outlet port. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without any creative work.

[0032] FIG1 is a schematic diagram of the internal structure of an embodiment of a noise reduction structure provided by the present application;

[0033] FIG2 is a schematic cross-sectional view of the noise reduction structure in FIG1 ;

[0034] FIG3 is another cross-sectional schematic diagram of the noise reduction structure in FIG1 ;

[0035] FIG4 is a schematic diagram of a partial structure of the noise reduction structure in FIG1 ;

[0036] FIG5 is an enlarged schematic diagram of point A in FIG4 .

[0037] Description of Figure Numbers:

[0038] Reference numerals Name Reference numerals Name 100 silencing structure 12 second shell 1 main body 12a first groove a silencing cavity 121a first mounting notch a1 first silencing cavity 12b second groove a2 second silencing cavity 121b second mounting notch b air intake port 13 partition c air outlet 12c sealing groove d silencing hole 2 communicating portion e first through hole 2a air inlet end of communicating portion f second through hole 2b air outlet end of communicating portion 11 first shell 21 first pipe section 111 first mounting portion 22 second pipe section 112 second mounting portion 3 air intake pipe 113 rib 4 air outlet pipe

[0039] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Refrigerators are essential household appliances in daily life, and people have increasingly high expectations for their performance. Besides its crucial freezing capacity, refrigerator comfort is also one of the most critical performance indicators. Noise, as a key comfort parameter, has attracted considerable attention. In related technologies, the internal pipe structure of a compressor's suction muffler incorporates multiple muffler chambers to achieve noise reduction. However, as air flows through these chambers, it is affected by the inlets and outlets of each chamber, resulting in high flow resistance and poor continuity, leading to poor cooling performance.

[0044] In order to solve the above problems, the present application provides a sound-absorbing structure. Figure 1 is a schematic diagram of the internal structure of an embodiment of the sound-absorbing structure provided by the present application; Figure 2 is a cross-sectional schematic diagram of the sound-absorbing structure in Figure 1; Figure 3 is another cross-sectional schematic diagram of the sound-absorbing structure in Figure 1; Figure 4 is a schematic diagram of a partial structure of the sound-absorbing structure in Figure 1; and Figure 5 is an enlarged schematic diagram of point A in Figure 4.

[0045] Please refer to Figures 1 to 3. The silencer structure 100 includes a main body 1 and a connecting part 2. The main body 1 has a silencer cavity a, and an air intake port b and an air outlet c connected to the silencer cavity a; the connecting part 2 is arranged in the silencer cavity a, and the connecting part 2 includes an air duct. The air inlet end 2a and the air outlet end of the connecting part are both connected to the silencer cavity a, the air inlet end 2a of the connecting part is arranged toward the air intake port b, and the air outlet end 2b of the connecting part is arranged toward the air outlet c.

[0046] In one embodiment, the connecting portion 2 can be a separately provided component, or it can be a structure that can function as a connection on a component located in the muffler chamber a. For example, the connecting portion 2 can be a connecting pipe that is fixedly connected to the inner wall of the muffler chamber a through a connector. Of course, the connecting portion 2 can also be a connecting hole on a partition that divides the muffler chamber a into two muffler chambers. The connecting hole can be in the form of an inclined hole, so that one end of the inclined hole forms an air inlet end facing the air intake port b, and the other end of the inclined hole forms an air outlet end facing the air outlet c. Of course, the connecting portion 2 is not limited to the above examples. Technicians in the relevant field may make other changes based on the technical essence of the embodiments of this specification. However, as long as the functions and effects achieved are the same or similar to those of the embodiments of this specification, they should be covered within the scope of protection of the embodiments of this specification.

[0047] The air intake b and the air outlet c can be openings directly provided on the cavity wall of the silencer cavity a, or can be the air intake b and the air outlet c respectively formed by the pipe openings of the air intake pipe 3 and the air outlet pipe 4 respectively provided on the cavity wall of the silencer cavity a. The specific design can be based on actual conditions, and the embodiments of this specification do not limit this.

[0048] The silencer of the present application utilizes the expansion and contraction of the cross-sectional area to cause reflection and interference of sound waves to achieve noise reduction. In one embodiment, the cross-sectional area of ​​the silencer chamber a is much larger than the cross-sectional size of the air intake port b and the air outlet c, and the cross-sectional size of the air duct is also set to be much smaller than the cross-sectional size of the silencer chamber a.

[0049] In the technical solution provided by the present application, an air intake port b and an air outlet port c are provided on the main body 1 at intervals. When the air flow enters the silencer chamber a from the air intake port b in the circulation pipeline, it enters the expansion chamber formed by the silencer chamber a. The expansion chamber silencer causes the sound waves to reflect and interfere with each other according to the sudden change in cross-section. When the air flow flows from the air intake port b through the silencer chamber a to the air outlet c, the inlet and outlet distances of the expansion chamber silencer are large, and the air flow is easy to diverge. When it flows out from the air outlet c, it is easily affected by the resistance of the inner wall of the silencer chamber a, and the flow resistance is large. The connecting portion 2 is provided in the silencer chamber a, and the noise generated by the air flow enters the silencer chamber a with a larger cross-section from the air intake port b, and when it flows through the airway, the cross-section changes again. When it flows from the airway through the silencer chamber a, the cross-section changes again. Finally, when it flows out from the air outlet c, the sound waves After multiple reflections, a good silencer effect can be achieved. At the same time, the air inlet end 2a of the connecting part is arranged toward the air intake port b, and the air outlet end 2b of the connecting part is arranged toward the air outlet c. When the air flows through the air intake port b into the silencer chamber a, due to the viscosity of the fluid, most of the air flow will enter the air inlet end 2a of the connecting part and flow along the air duct to the air outlet end 2b of the connecting part, and the air outlet end 2b of the connecting part faces the air outlet c. Due to the viscosity of the air flow, most of the air flow will enter the air outlet c. Therefore, in the process of the air flow from the air intake port b, the silencer chamber a, the air duct, the silencer chamber a and finally flowing to the air outlet c, the air flow can be well guided so that the flow resistance of the air flow can be greatly reduced, thereby solving the problem of large flow resistance and poor continuity when the air flow flows through the muffler, which affects the refrigeration performance.

[0050] In the related art, in order for the silencer in the compressor structure to adapt to the position layout of the external environmental parts, the directions of the air intake port b and the air outlet c of the silencer are not in a straight line, that is, the direction of the air intake port b is different from the direction of the air outlet c. Then, during the flow process, the air flow will be ejected from the direction of the air intake port b, and will be reflected by the partition or the inner wall of the silencer chamber a and the action of air pressure, and then discharged from the air outlet c. Then, the air flow will be subject to multiple flow resistances.

[0051] In one embodiment, the connecting portion 2 includes a connecting pipe, which includes a first pipe segment 21 extending along a first direction and a second pipe segment 22 extending along a second direction, wherein the first and second directions intersect. The air intake port b is aligned with the opening of the first pipe segment 21 in the first direction, and the air outlet c is aligned with the opening of the second pipe segment 22 in the second direction. With this arrangement, the central axis of the first pipe segment 21 is collinear with the central axis of the air intake port b in the first direction, and the central axis of the second pipe segment 22 is collinear with the central axis of the air outlet c in the second direction. This allows the majority of the airflow ejected from the air intake port b to directly enter the first pipe segment 21 along the first direction, while the airflow ejected from the second pipe segment 22 can also directly enter the air outlet c along the second direction.

[0052] In order to reduce the flow resistance and energy loss of the air flow as much as possible during the flow process, the diameter of the air intake port b can be set to the same as the size of the pipe opening of the first pipe segment 21, and the diameter of the air outlet c can be set to the same as the size of the pipe opening of the second pipe segment 22. In one embodiment, the diameter of the air intake port b, the diameter of the first pipe segment 21, the diameter of the second pipe segment 22 and the diameter of the air outlet c can all be set to the same.

[0053] In one embodiment, the distance between the orifice of the first pipe section 21 and the air outlet c is S1, wherein 1mm≤S1≤3mm; and / or, the distance between the orifice of the second pipe section 22 and the air intake b is S2, wherein 1mm≤S2≤3mm. It is understandable that, since the distance between the inlet and outlet of the expansion chamber silencer is large, the airflow is easy to diverge, and it is easier to form vortices and generate noise after impacting the sudden change cross section. Therefore, it is necessary to set a more appropriate distance between the air intake b and the first pipe section 21, so that the airflow can not only flow smoothly into the airway, but also reflect the sound waves in the silencer chamber a in time for silencing. When S1 and S2 are too small, it is not conducive to the reflection and silencing of the sound waves, and the silencing effect is weakened; when S1 and S2 are too large, the airflow is easy to diverge and generate noise. The specific values ​​of S1 and S2 can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0054] In one embodiment, the connecting portion 2 is further provided with a silencer hole d, which is connected to the airway. The provision of the silencer hole d not only achieves a silencer effect through sound wave reflection and interference, but also involves fluid dynamics. When the exhaust flow passes through the silencer hole d, the flow velocity increases due to the limited aperture, thereby generating certain vortices. These vortices consume some of the energy of the sound waves, reducing their intensity. Furthermore, the provision of the silencer hole d can also change the propagation direction of the sound waves, causing them to diffuse within a specific area, thereby achieving a better silencer effect.

[0055] The muffler hole d can be configured as a circular or rectangular hole. A circular hole is the most common shape for muffler holes d, offering advantages in ease of processing and manufacturing. Furthermore, the smooth edges of a circular hole can reduce fluid disturbance and vortex formation, facilitating the propagation and interference of sound waves. A rectangular hole is also a commonly used shape for muffler holes d, offering advantages in providing a larger surface area, thereby increasing sound wave absorption and dissipation.

[0056] In one embodiment, referring to Figures 4 and 5, the connecting portion 2 has a pipe section located within the second silencer chamber a2, the length of the pipe section being L, and the silencer hole d being located at 1 / 3L to 2 / 3L of the pipe section. The diameter of the silencer hole d is D0, where 1mm≤D0≤2mm. If the diameter of the silencer hole d is set too small, effective sound wave interference and eddy current consumption are difficult to achieve, resulting in poor silencer effect. If the diameter of the silencer hole d is set too large, the airflow will partially overflow from the silencer hole d when flowing within the airway, causing airflow loss. Because the silencer hole d can guide the airflow to flow in a specific manner, it changes the propagation direction and energy distribution of the sound waves. By optimizing the position and size of the silencer hole d, the sound waves can be more fully consumed and interfered within the silencer chamber a, thereby achieving a better silencer effect.

[0057] In one embodiment, the muffler chamber a includes a first muffler chamber a1 and a second muffler chamber a2, spaced apart from each other. The air intake port b is connected to the first muffler chamber a1, and the air outlet port c is connected to the second muffler chamber a2. The air intake end 2a of the connecting portion is located within the first muffler chamber a1, and the air outlet end 2b of the connecting portion is located within the second muffler chamber a2. As a result, when air flows through the first muffler chamber a1, sound waves are initially absorbed and attenuated. However, since some noise remains after the air flows through the first muffler chamber a1, this noise is further absorbed and attenuated within the second muffler chamber a2. By connecting the two muffler chambers a in series, exhaust noise can be further reduced and the muffler effect improved. If too few muffler chambers a are provided in a muffler, the muffler effect may be poor and the exhaust noise may be high. However, if too many muffler chambers a are provided, the size and cost of the muffler may increase. Furthermore, excessive muffler chambers a may create excessive resistance to the exhaust flow, impacting engine performance and fuel economy.

[0058] Because the connecting portion 2 is disposed within the muffler chamber a, and in order to facilitate manufacturing and subsequent assembly, in one embodiment, the main body 1 includes a first shell 11 and a second shell 12 disposed opposite each other. The second shell 12 is formed with a groove having a notch facing the first shell 11. A partition 13 extends from the bottom of the groove along the groove depth toward the notch to separate the groove into adjacent first and second grooves 12a and 12b. The first shell 11 covers the notches of the first and second grooves 12a and 12b to enclose the first and second muffler chambers a1 and a2 with the second shell 12, and the connecting portion 2 is passed through the partition 13. The structure is simple: by combining the two shells, a closed muffler space can be simply and effectively formed without the need for a complex internal structure. The two shells of the muffler chamber a can be manufactured separately and then combined through a suitable process, which reduces the manufacturing difficulty and also facilitates demolding of the first and second shells 11 and 12. The design of the muffler chamber a can be adjusted as needed. For example, the shape, size and material of the shell can be flexibly changed to adapt to engines of different displacements and different muffler requirements.

[0059] During assembly, a seal needs to be set between the first shell 11 and the second shell 12 to enclose and form a closed sealed cavity to avoid airflow loss and reduce noise. The first shell 11 and the second shell 12 can be fixedly connected by gluing, bolting, etc. to ensure the stability of the first shell 11 and the second shell 12.

[0060] In one embodiment, a first mounting notch 121a is provided on the side wall of the first groove 12a, and a second mounting notch 121b is provided on the side wall of the second groove 12b. The air intake end of the connecting portion 2 is located in the first groove 12a and faces the first mounting notch 121a, and the air outlet end 2b of the connecting portion is located in the second groove 12b and faces the second mounting notch 121b. In this way, when the second shell 12 is molded, the first groove 12a, the second groove 12b and the partition 13 are formed, and the connecting portion 2 is conveniently molded as one piece at the same time.

[0061] In order to match the second shell 12 and ensure that the air intake port b and the air outlet port c are aligned with the air inlet end 2a and the air outlet end of the connecting portion, respectively, the first shell 11 includes a first mounting portion 111 embedded in the first mounting notch 121a and a second mounting portion 112 embedded in the second mounting notch 121b. The muffler structure 100 also includes an air intake pipe 3 passing through the first mounting portion 111 and an air outlet pipe 4 passing through the second mounting portion 112. The pipe opening of the air intake pipe 3 toward the air intake end of the connecting portion 2 forms the air intake port b, and the pipe opening of the air intake pipe 3 toward the air outlet end 2b of the connecting portion forms the air outlet c. In this way, after the first shell 11 is formed, it is convenient to install the air intake pipe 3 and the air outlet pipe 4 on the first mounting portion 111 and the second mounting portion 112, respectively. At the same time, it is convenient to connect the silencer to the external circulation pipeline, that is, one end of the intake pipe 3 is connected to the refrigerant circulation pipeline, and the other end is connected to the first silencer chamber a1, while one end of the outlet pipe 4 is connected to the refrigerant circulation pipeline, and the other end is connected to the second silencer chamber a2.

[0062] Since the basic muffler principle of the resonance cavity of the silencer is the Helmholtz resonator, the expansion ratio determines the muffler's muffler volume, and the expansion chamber length and the insertion tube depth determine the muffler frequency, the present application can appropriately adjust the length of the intake pipe 3 and the outlet pipe 4 inserted into the muffler cavity a according to the required muffler frequency.

[0063] In one embodiment, a sealing groove 12c is recessed along the groove's periphery along its depth. The sealing groove 12c is circumferentially disposed around the groove's periphery. A rib 113 is protruded from the side of the first housing 11 facing the second housing 12 to engage with the sealing groove 12c. The rib 113 and the sealing groove 12c provide a seal between the first and second housings 11 and 12. By matching the shape and dimensions of the sealing groove 12c with the rib 113, when the rib 113 is positioned within the sealing groove 12c, the sides and bottom of the rib 113 tightly contact the sides and bottom of the sealing groove 12c, forming a tight sealing interface and achieving a good sealing effect. Furthermore, the cooperation between the rib 113 and the sealing groove 12c provides a high load-bearing capacity, capable of withstanding significant pressure and tension. Therefore, the rib 113 is suitable for sealing in harsh environments such as high pressure and high temperature, and does not deform or leak due to changes in temperature or pressure. Furthermore, the rib 113 and the sealing groove 12c cooperate to achieve sealing, making them easier to install and disassemble, and convenient for maintenance and replacement, compared to bolting or bonding. Furthermore, the rib 113 and the sealing groove 12c can be combined using a simple structure and materials, resulting in lower costs compared to other sealing methods, making them suitable for large-scale production and application.

[0064] Because oil mist is mixed with the refrigerant airflow during flow, to prevent oil mist from accumulating within the muffler chamber a and affecting the normal operation of the muffler, in one embodiment, the main body 1 is provided with a first through hole e connecting the first muffler chamber a1 and the second muffler chamber a2; and / or the main body 1 is provided with a second through hole f connecting the second muffler chamber a2 and the outside world. This facilitates the discharge of oil accumulated in the first muffler chamber a1 and the second muffler chamber a2 through the first through hole e and the second through hole f, respectively.

[0065] In one embodiment, the diameter D1 of the first via hole e is 0.5 mm ≤ D1 ≤ 1.5 mm; and / or the diameter D2 of the second via hole f is 0.5 mm ≤ D2 ≤ 1.5 mm. In one embodiment, the diameters of the first and second via holes e and f are set to 1 mm. This prevents the difficulty of oil discharge when the diameters of the first and second via holes e and f are set too small. Similarly, when the diameters of the first and second via holes e and f are set too large, additional noise is generated and airflow is affected.

[0066] The present application also provides a compressor, which includes the above-mentioned silencer structure 100, and the compressor also includes other components such as a crankcase, a compressor, etc. Since the compressor includes the silencer structure 100, the specific structure of the silencer structure 100 refers to the above-mentioned embodiment. Since the silencer structure 100 of this compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0067] For the compressor, the connecting portion 2 can greatly reduce the flow resistance of the airflow, thereby preventing excessive flow resistance from causing the gas discharged from the compressor to generate vortexes and resistance in the muffler, increasing the energy consumption and internal losses of the compressor, and thus reducing the efficiency of the compressor. Of course, when the flow resistance in the muffler structure 100 is too large, it also causes the gas discharged from the compressor to generate backflow and turbulence in the muffler, resulting in increased compressor noise. By providing the connecting portion 2, the load and wear of the compressor are also reduced, and the instability of the gas discharged from the compressor is avoided, so as to avoid unstable airflow that causes gas flow and pressure fluctuations, thereby negatively affecting the stability and control accuracy of the entire system.

[0068] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A sound-absorbing structure, wherein: The noise reduction structure comprises: A main body, the main body having a muffler cavity, and an air inlet and an air outlet connected to the muffler cavity; and A connecting part is arranged in the silencing cavity, the connecting part includes an airway, the air inlet end and the air outlet end of the connecting part are both connected to the silencing cavity, the air inlet end of the connecting part is arranged toward the air inlet, and the air outlet end of the connecting part is arranged toward the air outlet.

2. The sound absorbing structure according to claim 1, wherein: The communication portion includes a communication pipe, the communication pipe includes a first pipe section extending along a first direction, and a second pipe section extending along a second direction, the first direction and the second direction are arranged to intersect; The air inlet is arranged to be aligned with the pipe opening of the first pipe section in the first direction, and the air outlet is arranged to be aligned with the pipe opening of the second pipe section in the second direction.

3. The sound absorbing structure according to claim 2, wherein: The distance between the pipe opening of the first pipe section and the air outlet is S1, wherein 1mm≤S1≤3mm; and / or, The distance between the pipe opening of the second pipe section and the air intake port is S2, wherein 1mm≤S2≤3mm.

4. The sound absorbing structure according to any one of claims 1 to 3, wherein: The communicating portion is also provided with a silencer hole, and the silencer hole is communicated with the airway.

5. The sound absorbing structure according to claim 4, wherein: The connecting portion has a pipe section located in the second silencing cavity, the length of the pipe section is L, and the silencing hole is arranged at 1 / 3L to 2 / 3L of the pipe section.

6. The sound absorbing structure according to claim 4, wherein: The diameter of the muffler hole is D0, wherein 1mm≤D0≤2mm.

7. The sound absorbing structure according to any one of claims 1 to 6, wherein: The silencing chamber comprises a first silencing chamber and a second silencing chamber which are spaced apart from each other, the air inlet is connected to the first silencing chamber, and the air outlet is connected to the second silencing chamber; The air inlet end of the connecting portion is located in the first silencing cavity, and the air outlet end of the connecting portion is located in the second silencing cavity.

8. The sound absorbing structure according to claim 7, wherein: The main body includes a first shell and a second shell that are arranged opposite to each other, the second shell is formed with a groove with a notch facing the first shell, the bottom of the groove has a partition extending along the groove depth toward the notch direction to divide the groove into a first groove and a second groove that are adjacently arranged, the first shell covers the notches of the first groove and the second groove to enclose the first silencer chamber and the second silencer chamber together with the second shell, and the connecting portion is passed through the partition.

9. The sound absorbing structure according to claim 8, wherein: The side wall of the first groove is provided with a first installation notch, the side wall of the second groove is provided with a second installation notch, the air intake end of the communication part is located in the first groove and faces the first installation notch, and the air outlet end of the communication part is located in the second groove and faces the second installation notch; The first housing includes a first mounting portion embedded in the first mounting notch, and a second mounting portion embedded in the second mounting notch; The silencer structure also includes an air intake pipe passing through the first mounting portion, and an air outlet pipe passing through the second mounting portion, wherein the pipe opening of the air intake pipe at the air intake end facing the connecting portion forms the air intake port, and the pipe opening of the air intake pipe at the air outlet end facing the connecting portion forms the air outlet port.

10. The sound absorbing structure according to claim 8, wherein: A sealing groove is concavely provided on the periphery of the notch of the groove along the groove depth direction, and the sealing groove is arranged around the periphery of the notch of the groove; A convex rib matched with the sealing groove is convexly provided on one side of the first shell facing the second shell, and the first shell and the second shell are sealed and matched with each other through the convex rib and the sealing groove.

11. The sound absorbing structure according to claim 7, wherein: The main body is provided with a first through hole connecting the first silencing cavity and the second silencing cavity; and / or, The main body is provided with a second through hole connecting the second silencing cavity and the outside.

12. The sound absorbing structure according to claim 11, wherein: The diameter D1 of the first via hole, wherein 0.5 mm ≤ D1 ≤ 1.5 mm; and / or, The diameter D2 of the second via hole is 0.5 mm ≤ D2 ≤ 1.5 mm.

13. A compressor, wherein: The invention comprises a sound-absorbing structure as claimed in any one of claims 1 to 12.

Images