Silencer for compressor, compressor and household appliance

Abstract

The utility model discloses a compressor's silencer, compressor and household appliance, the silencer includes: casing, and the casing is equipped with suction port and gas outlet, baffle, baffle is located in the casing, to divide the casing and form first cavity and second cavity, first cavity communicates suction port, and second cavity communicates gas outlet, and the baffle is equipped with the spout, and the spout communicates first cavity and second cavity, expansion pipeline, expansion pipeline is located in first cavity, and one end of expansion pipeline is equipped with the export, and the other end is equipped with the import, and the import is opposite and is immediately adjacent suction port, on the plane perpendicular to suction port air inlet direction, and the projection profile of suction port on the plane is located in the projection profile of the import in the plane. The utility model discloses a setting expansion pipeline in the casing can realize two -stage expansion in the casing to gas in the suction process, can effectively dissipate the noise of the suction, reduce the pneumatic noise of silencer itself, and then be favorable to reduce the suction noise of compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor muffler, a compressor, and a household appliance. Background Technology

[0002] As an essential household appliance, the refrigerator's main functions are freezing and refrigeration, which are primarily achieved through a compressor. The main component of the compressor is the pump body, which consists of a crankshaft connecting rod mechanism, a motor, and a suction and discharge system. The pump body accounts for over 70% of the compressor's total weight. The pump body is suspended within the compressor's sealed housing by 3-4 springs. A stator screw secures the compressor motor's stator to the compressor crankcase, with the inner hole of the stator screw pin engaging with the outer surface of the stator screw head. The outer surface of the stator screw pin engages with the tightly wound portion at the upper end of the compressor seat spring, and the tightly wound portion at the lower end of the compressor seat spring engages with the outer surface of the bushing. The bushing then engages with a pin on the lower housing of the compressor, forming a complete connection structure for the compressor pump body within the housing.

[0003] The intake silencer plays a crucial role in the intake and exhaust system of a compressor. Since the intake component of a reciprocating compressor is directly connected to the cavity inside the compressor housing, the design of the intake silencer has a significant impact on the compressor's cooling capacity and noise. Therefore, how to solve the problem of excessive noise from the intake silencer during the intake process has become one of the urgent issues to be addressed. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a compressor silencer that effectively solves the problem of excessive noise during the air intake process.

[0005] This utility model also proposes a compressor that uses the silencer of the above-mentioned compressor.

[0006] This utility model also proposes a household appliance that uses the above-mentioned compressor.

[0007] A silencer for a compressor according to an embodiment of the present invention includes: a housing having an intake port and an outlet port; a partition plate disposed within the housing to divide the interior of the housing into a first cavity and a second cavity, the first cavity being connected to the intake port and the second cavity being connected to the outlet port, the partition plate having an insertion tube connecting the first cavity and the second cavity; and an expansion pipe disposed within the first cavity, one end of the expansion pipe having an outlet port and the other end having an inlet port, the inlet port being directly opposite to and adjacent to the intake port, and on a plane perpendicular to the intake direction of the intake port, the projected outline of the intake port on the plane being located within the projected outline of the inlet port on the plane.

[0008] According to the compressor muffler of the present invention, by setting an expansion pipe in the housing, the gas can achieve two-stage expansion in the housing during the intake process. Each gas expansion can dissipate the intake noise. Thus, the noise during intake can be effectively dissipated through two gas expansions, reducing the aerodynamic noise of the muffler itself, thereby achieving a better muffler effect and helping to reduce the intake noise of the compressor.

[0009] In some embodiments of this utility model, the size of the housing in the first direction is greater than the size in the second direction, the expansion pipe is a straight pipe extending along the first direction, and the insertion tube is a straight pipe extending along a third direction and is spaced apart from the expansion pipe in the second direction. The first direction is perpendicular to the plane, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0010] In some embodiments of this utility model, in the direction from the inlet to the outlet, the area of ​​the cross-section of the expansion pipe perpendicular to the first direction gradually decreases, and the area of ​​the shape enclosed by the projection outline of the air intake on the plane is smaller than the area of ​​the cross-section.

[0011] In some embodiments of this utility model, the cross-section is rectangular, the dimension of the cross-section in the third direction is greater than the dimension in the second direction, and in the direction from the inlet to the outlet, the dimension of the cross-section in the third direction gradually decreases, while the dimension in the third direction remains unchanged.

[0012] In some embodiments of this utility model, the dimension of the outlet in the third direction is H1, and the dimension of the insertion tube in the third direction is H2, wherein H2≥0.5H1.

[0013] In some embodiments of this utility model, the expansion pipe is provided with a flow guide section. The flow guide section has a flow guide surface and a flow disturbance surface that are connected to each other and set at an angle. The flow guide surface is located on the side of the flow guide section near the inlet, and the flow disturbance surface is located on the other side of the flow guide section near the outlet. The angle between the flow guide surface and the inner wall surface of the expansion pipe is smaller than the angle between the flow disturbance surface and the inner wall surface.

[0014] In some embodiments of this utility model, the angle between the guide surface and the inner wall of the expansion pipe is α, and the angle between the turbulence surface and the inner wall is β, wherein 10 degrees ≤ α ≤ 25 degrees, and 0 degrees < β ≤ 90 degrees.

[0015] In some embodiments of this utility model, the expansion pipe is a straight pipe extending along a first direction, the dimension of the expansion pipe in the first direction is L1, and the dimension of the guide portion in the first direction is L2, wherein 0.25L1≤L2≤0.5L1.

[0016] In some embodiments of this utility model, the expansion pipe is a straight pipe extending along a first direction, and the guide portion is an annular structure arranged around the first direction, and multiple such structures are provided in the first direction.

[0017] In some embodiments of this utility model, the housing includes an upper housing and a lower housing, the bottom of the upper housing is open, the top of the lower housing is open, the expansion pipe is disposed on the partition, the partition covers the opening of the lower housing, and the upper housing covers the lower housing.

[0018] A compressor according to an embodiment of the present invention includes a muffler as described in any of the preceding descriptions.

[0019] According to the present invention, the compressor can reduce intake noise by using the above-mentioned compressor muffler, thereby reducing the operating noise of the compressor and improving the user experience.

[0020] A household appliance according to an embodiment of the present invention includes a compressor as described above.

[0021] According to the embodiments of the present invention, the household appliance using the above-mentioned compressor can reduce suction noise, thereby reducing the operating noise of the household appliance and improving the user experience.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 Explosive decomposition of the compressor muffler provided in some embodiments of this utility model Figure 1 ; Figure 2 A cross-sectional view of the internal structure of a compressor muffler provided in some embodiments of this utility model; Figure 3 This is a schematic diagram of the internal structure of the expansion pipe provided in some embodiments of the present invention; Figure 4 Explosive decomposition of the compressor muffler provided in some embodiments of this utility model Figure 2 ; Figure 5 for Figure 3 A magnified view of part I.

[0024] Figure label: 10. Muffler; 1. Shell; 1a. Inlet; 1b. Outlet; 101. First cavity; 102. Second cavity; 11. Upper shell; 12. Lower shell; 2. Partition; 3. Expansion pipe; 3a. Outlet; 3b. Inlet; 3c. Top wall surface; 3d. Bottom wall surface; 4. Intubation; 5. Guide section; 5a. Guide surface; 5b. Turbulence surface; 6. Inhalation tube; 7. Exhalation tube. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The silencer 10 of the compressor in this embodiment of the invention is applied to the compressor. The silencer 10 aims to reduce the suction noise of the compressor and increase its cooling capacity. The compressor can be, but is not limited to, a reciprocating compressor.

[0028] The following is for reference. Figures 1-4 This describes a muffler 10 for a compressor according to an embodiment of the present invention.

[0029] like Figure 1 As shown, a muffler 10 for a compressor according to an embodiment of the present invention includes a housing 1, a partition 2, and an expansion pipe 3. The housing 1 has an intake port 1a and an outlet port 1b. The partition 2 is disposed inside the housing 1 to divide the interior of the housing 1 into a first cavity 101 and a second cavity 102. The first cavity 101 is connected to the intake port 1a, and the second cavity 102 is connected to the outlet port 1b. The partition 2 is provided with an insertion tube 4, which connects the first cavity 101 and the second cavity 102. The expansion pipe 3 is disposed in the first cavity 101. One end of the expansion pipe 3 has an outlet 3a, and the other end has an inlet 3b. The inlet 3b is directly opposite to and adjacent to the intake port 1a. On a plane perpendicular to the intake direction of the intake port 1a, the projected outline of the intake port 1a on the plane is located within the projected outline of the inlet 3b on the plane.

[0030] In the above technical solution, the inlet 3b is directly opposite and adjacent to the suction port 1a. This can mean that the end of the expansion pipe 3 where the inlet 3b is located can be close to the shell wall of the housing 1 where the suction port 1a is located, or it can be separated from the shell wall by a very small distance. In this way, the gas from the suction port 1a can directly enter the inlet 3b of the expansion pipe 3. On a plane perpendicular to the air intake direction of the suction port 1a, the projected outline of the suction port 1a on the plane is located within the projected outline of the inlet 3b on the plane. That is to say, the opening size of the inlet 3b is larger than the opening size of the suction port 1a. Thus, gas expansion can be achieved during the process of gas entering the inlet 3b from the suction port 1a, which helps to reduce noise. For example, the shapes of the inlet 3b and the suction port 1a can be the same or different. As an example, both the inlet 3b and the suction port 1a can be circular, in which case the diameter of the inlet 3b is larger than the diameter of the suction port 1a. Another example is that the inlet 3b can be rectangular and the suction port 1a can be circular, with the area of ​​the rectangle being larger than the area of ​​the circle.

[0031] When the compressor's silencer 10 is working, gas enters the housing 1 from the intake port 1a. Since the projected outline of the intake port 1a lies within the projected outline of the inlet 3b on a plane perpendicular to the intake direction, the gas undergoes one expansion as it enters the inlet 3b from the intake port 1a. Next, the gas flows along the expansion pipe 3 and flows into the first cavity 101 from the outlet 3a. Because the volume of the first cavity 101 is significantly larger than the volume of the expansion pipe 3, the gas undergoes another expansion as it enters the first cavity 101 from the outlet 3a. In other words, the gas completes two expansion processes upon reaching this point, which dissipates the noise during intake. Immediately afterwards, the gas enters the second cavity 102 through the insertion tube 4 and flows out from the outlet 1b of the housing 1.

[0032] According to the embodiment of the present utility model, the muffler 10 of the compressor can achieve two-stage expansion of gas in the housing 1 during the suction process by setting an expansion pipe 3 in the housing 1. Each gas expansion can dissipate the suction noise. Thus, the noise during suction can be effectively dissipated through two gas expansions, reducing the aerodynamic noise of the muffler 10 itself, thereby achieving a better noise reduction effect and helping to reduce the suction noise of the compressor.

[0033] In some embodiments of this utility model, such as Figure 1 As shown, the size of the housing 1 in the first direction is larger than the size in the second direction. The expansion pipe 3 is a straight pipe extending along the first direction, and the insertion pipe 4 is a straight pipe extending along the third direction and is spaced apart from the expansion pipe 3 in the second direction. The first direction is perpendicular to the plane, and the first direction, the second direction and the third direction are perpendicular to each other.

[0034] refer to Figure 1The first direction can be front-to-back, the second direction can be left-to-right, and the third direction can be up-to-down. Since the size of the housing 1 in the first direction is larger than its size in the second direction, the muffler 10 of the compressor of this invention is relatively slender overall. The housing 1 with the above structure can be installed in a compact compressor housing, which is beneficial for achieving a compact arrangement inside the compressor.

[0035] Secondly, since the expansion pipe 3 is a straight pipe extending along the first direction and the insertion pipe 4 is a straight pipe extending along the third direction, and is spaced apart from the expansion pipe 3 in the second direction, the expansion pipe 3 and the insertion pipe 4 can be staggered, which can optimize the arrangement of the internal components of the muffler 10, making it easier to install the expansion pipe 3 and the insertion pipe 4 inside the housing 1. Moreover, the expansion pipe 3 can be arranged along the length direction of the housing 1, which can increase the length of the expansion pipe 3, thereby increasing the flow channel length of the expansion pipe 3, enhancing the expansion effect of the expansion pipe 3, and further reducing the intake noise.

[0036] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, in the direction from inlet 3b to outlet 3a, the area of ​​the cross-section of the expansion pipe 3 perpendicular to the first direction gradually decreases, and the area of ​​the figure enclosed by the projection outline of the air intake 1a on the plane is smaller than the area of ​​the cross-section.

[0037] The direction from entrance 3b to exit 3a can be used as a reference. Figure 2 and Figure 3 From front to back. The cross-sectional area of ​​the expansion pipe 3 perpendicular to the first direction gradually decreases, thus the expansion pipe 3 is a reduced structure design. The expansion pipe 3 can be, but is not limited to, a reduced rectangular pipe, a circular pipe, etc. This can guide the airflow to accelerate smoothly, allow the airflow to enter steadily, reduce local high-speed turbulence, and help reduce the noise generated by the gas inside the expansion pipe 3, thereby reducing the intake noise of the silencer 10.

[0038] In some embodiments of this utility model, such as Figure 1 As shown, the cross-section is rectangular, and the dimension of the cross-section in the third direction is greater than the dimension in the second direction. In the direction from the inlet 3b to the outlet 3a, the dimension of the cross-section in the third direction gradually decreases, while the dimension in the third direction remains unchanged.

[0039] In the above technical solution, the expansion pipe 3 has a rectangular cross-section. This design maximizes the utilization of the dimensions of the shell 1 in the third direction (depth direction), allowing the expansion pipe 3 to have a larger size. Compared to structures with circular or square cross-sections, the rectangular cross-section of the expansion pipe 3 in the above solution allows for a larger cross-sectional area within a limited space, thereby enhancing the airflow expansion effect and noise reduction effect.

[0040] In some embodiments of this utility model, such as Figure 2 As shown, the expansion pipe 3 has a top wall surface 3c and a bottom wall surface 3d arranged in a third direction. The top wall surface 3c is a straight surface extending along the first direction, and the bottom wall surface 3d is an inclined surface relative to the first direction. In the above technical solution, while satisfying the requirement that the cross-section of the expansion pipe 3 gradually decreases, by setting the top wall surface 3c as a straight surface and the bottom wall surface 3d as an inclined surface, the expansion pipe 3 is made into a wedge-shaped pipe as a whole. This allows full utilization of the space within the first cavity 101, enabling the expansion pipe 3 to have a larger size and enhancing the airflow expansion effect. In particular, the inlet 3b of the expansion pipe 3 can be larger, making the airflow expansion effect more obvious during the first expansion, and thus reducing the intake noise effect is also better.

[0041] In some embodiments of this utility model, such as Figure 4 As shown, the dimension of outlet 3a in the third direction is H1, and the dimension of tube 4 in the third direction is H2, where H2 ≥ 0.5H1. H2 can be, but is not limited to, 0.5H1, 0.6H1, 0.7H1, 0.8H1, 0.9H1, 1H1, 1.5H1, etc.

[0042] It is understandable that by setting the outlet 3a and the insertion tube 4 within the above relationship, the distance of the airflow from the outlet 3a to the bottom opening of the insertion tube 4 can be increased, which can increase the airflow path and avoid the situation where the airflow enters the insertion tube 4 quickly in a short time, thus preventing the gas from suddenly contracting. This helps to avoid local high-speed eddies and allows the airflow to enter the insertion tube 4 smoothly, thereby reducing noise and improving the noise reduction effect of the silencer 10.

[0043] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the expansion pipe 3 is provided with a flow guide 5. The flow guide 5 has a flow guide surface 5a and a turbulence surface 5b that are connected to each other and set at an angle. The flow guide surface 5a is located on the side of the flow guide 5 near the inlet 3b, and the turbulence surface 5b is located on the other side of the flow guide 5 near the outlet 3a. The angle between the flow guide surface 5a and the inner wall surface of the expansion pipe 3 is smaller than the angle between the turbulence surface 5b and the inner wall surface.

[0044] In the above technical solution, since the angle between the guide surface 5a and the inner wall of the expansion pipe 3 is smaller than the angle between the turbulence surface 5b and the inner wall, the guide surface 5a does not obstruct the airflow when the gas flows from the inlet 3b to the outlet 3a, and can play a guiding role. When the gas flows back (the gas flows backward from the outlet 3a to the inlet 3b), the turbulence surface 5b can play an obstructive role, and the airflow diverges. The backflowing airflow can form a vortex at the location of the turbulence surface 5b, thereby obstructing the gas backflow. This can effectively suppress the gas backflow, which is beneficial to reducing the gas leakage of the compressor, thereby increasing the cooling capacity of the compressor.

[0045] In some embodiments of this utility model, such as Figure 5 As shown, the angle between the guide surface 5a and the inner wall of the expansion pipe 3 is α, where 10 degrees ≤ α ≤ 25 degrees. α can be, but is not limited to, 10 degrees, 12 degrees, 14 degrees, 15 degrees, 16 degrees, 18 degrees, 20 degrees, 22 degrees, 24 degrees, 25 degrees, etc. By setting the angle between the guide surface 5a and the inner wall of the expansion pipe 3 within the above range, the guide surface 5a has a smaller obstruction effect on the airflow when the gas flows from the inlet 3b to the outlet 3a, resulting in a better guiding effect.

[0046] In some embodiments of this utility model, such as Figure 5 As shown, the angle between the turbulence-disrupting surface 5b and the inner wall surface is β, where 0 degrees < β ≤ 90 degrees. β can be, but is not limited to, 10 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, etc. By setting the angle between the turbulence-disrupting surface 5b and the inner wall surface within the above range, when backflow occurs in the expansion pipe 3, the turbulence-disrupting surface 5b has a stronger obstructive effect on the backflowing airflow, resulting in a better effect in suppressing gas backflow.

[0047] In some embodiments of this utility model, such as Figure 3 and Figure 5 As shown, the expansion pipe 3 is a straight pipe extending along the first direction, with a dimension L1 in the first direction and a dimension L2 in the first direction for the guide section 5, wherein 0.25L1≤L2≤0.5L1. L2 can be, but is not limited to, 0.25L1, 0.27L1, 0.29L1, 0.3L1, 0.32L1, 0.35L1, 0.4L1, 0.42L1, 0.45L1, 0.5L1, etc. By setting the dimensions of the guide section 5 and the expansion pipe 3 in the first direction within the above range, and combining this with the angle between the guide surface 5a and the inner wall of the expansion pipe 3 in the previous example, the protrusion height range of the guide section 5 can be obtained. This allows the turbulence surface 5b to be controlled within a suitable height range, which is beneficial for improving the effect of hindering gas backflow.

[0048] In some embodiments of this utility model, such as Figure 3As shown, the expansion pipe 3 is a straight pipe extending along the first direction, and the guide section 5 is an annular structure arranged around the first direction, with multiple sections arranged in the first direction. It can be understood that the annular structure of the guide section 5 increases the obstruction surface for the returning airflow, thereby enhancing the obstruction effect on airflow recirculation, better suppressing gas recirculation, and increasing the compressor's cooling capacity. By arranging multiple guide sections 5 in the first direction, the number of guide sections 5 is increased, thereby providing multiple obstructions to the returning airflow in the first direction, further hindering and suppressing gas recirculation, and increasing the compressor's cooling capacity.

[0049] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the housing 1 includes an upper housing 11 and a lower housing 12. The bottom of the upper housing 11 is open, and the top of the lower housing 12 is open. An expansion pipe 3 is provided on a partition 2, and the partition 2 covers the opening of the lower housing 12. The upper housing 11 covers the lower housing 12.

[0050] In the above technical solution, the housing 1 consists of two parts: an upper housing 11 and a lower housing 12. This allows the upper housing 11 to be detached from the lower housing 12, facilitating the installation of the internal partition 2 and improving installation, disassembly, and subsequent maintenance. The expansion pipe 3 can be an integral part of the partition 2, meaning the expansion pipe 3 is fixed to the partition 2. Alternatively, the expansion pipe 3 and the partition 2 can be detachably connected, using methods such as, but not limited to, bolted connections or snap-fit ​​connections. This facilitates the disassembly of the expansion pipe 3, allowing for replacement of only the damaged component if either the expansion pipe 3 or the partition 2 is damaged, thus reducing operating costs.

[0051] In some embodiments of this utility model, one of the upper housing 11 and the lower housing 12 is provided with a mounting groove, and the other is provided with a mounting protrusion. The mounting groove and the mounting protrusion are annular and cooperate with each other. For example, a mounting groove can be provided around the upper edge of the upper housing 11, and a mounting protrusion can be provided around the lower edge of the lower housing 12. The mounting protrusion and the mounting groove cooperate with each other, which can improve the positional accuracy and sealing of the upper housing 11 and the lower housing 12, thereby ensuring the noise reduction effect of the muffler 10.

[0052] Optionally, the upper housing 11 and the lower housing 12 are welded together, which ensures the sealing of the connection between the upper housing 11 and the lower housing 12 and prevents leakage of the entire muffler 10.

[0053] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 4As shown, the muffler 10 also includes an intake pipe 6 and an outlet pipe 7. The intake pipe 6 is located on the housing 1 and communicates with the intake port 1a, while the outlet pipe 7 is located on the housing 1 and communicates with the outlet port 1b. Optionally, the intake pipe 6 is funnel-shaped to smoothly guide airflow into the housing 1. The outlet pipe 7 is used for assembly with the compressor cylinder head to ensure that the gas used as refrigerant can be drawn into the compressor cylinder.

[0054] A compressor according to an embodiment of the present invention includes a muffler 10 as described in any of the preceding embodiments. It should be noted that other components of the compressor according to this embodiment, such as the compressor housing, motor, compression mechanism, lubrication system, shock absorption and support system, and their operation, are known to those skilled in the art and will not be described in detail here. The compressor may be, but is not limited to, a reciprocating compressor.

[0055] According to the present invention, the compressor can reduce intake noise by using the above-mentioned compressor muffler 10, thereby reducing the operating noise of the compressor and improving the user experience.

[0056] A household appliance according to an embodiment of the present invention includes a compressor as described above. The household appliance in this embodiment can refer to a device equipped with a compressor, such as, but not limited to, a refrigerator or air conditioner.

[0057] According to the embodiments of the present invention, the household appliance using the above-mentioned compressor can reduce suction noise, thereby reducing the operating noise of the household appliance and improving the user experience.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A silencer for a compressor, characterized in that, include: The housing is provided with an air intake and an air outlet; A partition is provided inside the housing to divide the interior of the housing into a first cavity and a second cavity. The first cavity is connected to the air intake port, and the second cavity is connected to the air outlet port. The partition is provided with a tube that connects the first cavity and the second cavity. An expansion pipe is provided in the first cavity. One end of the expansion pipe has an outlet and the other end has an inlet. The inlet is directly opposite to and adjacent to the air intake. On a plane perpendicular to the air intake direction of the air intake, the projection outline of the air intake on the plane is located within the projection outline of the inlet on the plane.

2. The silencer for the compressor according to claim 1, characterized in that, The housing has a larger dimension in the first direction than in the second direction. The expansion tube is a straight tube extending along the first direction. The insertion tube is a straight tube extending along a third direction and is spaced apart from the expansion tube in the second direction. The first direction is perpendicular to the plane, and the first direction, the second direction, and the third direction are perpendicular to each other.

3. The silencer for the compressor according to claim 2, characterized in that, In the direction from the inlet to the outlet, the area of ​​the cross-section of the expansion pipe perpendicular to the first direction gradually decreases, and the area of ​​the shape enclosed by the projection outline of the air intake on the plane is smaller than the area of ​​the cross-section.

4. The silencer for the compressor according to claim 3, characterized in that, The cross-section is rectangular, and its dimension in the third direction is greater than its dimension in the second direction. In the direction from the inlet to the outlet, the dimension of the cross-section in the third direction gradually decreases, while its dimension in the third direction remains constant.

5. The silencer for the compressor according to any one of claims 2 to 4, characterized in that, The outlet has a dimension of H1 in the third direction, and the cannula has a dimension of H2 in the third direction, wherein H2 ≥ 0.5H1.

6. The silencer for the compressor according to claim 1, characterized in that, The expansion pipe is provided with a flow guide section. The flow guide section has a flow guide surface and a flow disturbance surface that are connected to each other and set at an angle. The flow guide surface is located on the side of the flow guide section near the inlet, and the flow disturbance surface is located on the other side of the flow guide section near the outlet. The angle between the flow guide surface and the inner wall surface of the expansion pipe is smaller than the angle between the flow disturbance surface and the inner wall surface.

7. The silencer for the compressor according to claim 6, characterized in that, The angle between the guide surface and the inner wall of the expansion pipe is α, and the angle between the turbulence surface and the inner wall is β, wherein 10 degrees ≤ α ≤ 25 degrees, and 0 degrees < β ≤ 90 degrees.

8. The silencer for the compressor according to claim 7, characterized in that, The expansion pipe is a straight pipe extending along a first direction, the dimension of the expansion pipe in the first direction is L1, and the dimension of the guide portion in the first direction is L2, wherein 0.25L1≤L2≤0.5L1.

9. The silencer for the compressor according to any one of claims 6 to 8, characterized in that, The expansion pipe is a straight pipe extending along the first direction, and the guide section is an annular structure arranged around the first direction, and multiple such structures are provided in the first direction.

10. The silencer for the compressor according to claim 1, characterized in that, The housing includes an upper housing and a lower housing. The bottom of the upper housing is open, and the top of the lower housing is open. The expansion pipe is disposed on the partition plate, which covers the opening of the lower housing. The upper housing is disposed on the lower housing.

11. A compressor, characterized in that, The silencer includes the compressor as described in any one of claims 1 to 10.

12. A household appliance, characterized in that, Includes the compressor as described in claim 11.

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