Variable volume muffler and compressor

Abstract

The present invention provides a variable-volume silencer and compressor, relating to the field of silencer technology. It solves the technical problem in the prior art that the gas discharged from the flange will have a certain impact on the top of the silencer, while the volume of the existing silencer is usually fixed and unchanging, making it difficult to achieve a buffering effect on the impacted airflow. The variable-volume silencer includes a movable silencer portion, a silencer fixing portion, and an elastic structure, wherein the silencer fixing portion is fixedly connected to the flange, the silencer fixing portion is sleeved outside the movable silencer portion, one end of the elastic structure is connected to the movable silencer portion, and the other end is fixed. The airflow entering the silencer from the flange exhaust inlet can impact the movable silencer portion, causing the movable silencer portion to move away from the flange to increase the volume of the silencer. The present invention is used to reduce the noise of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, and in particular to a variable-volume muffler and a compressor equipped with the muffler. Background Art

[0002] When the motor of the rotary compressor is energized, the rotor rotates, which in turn drives the crankshaft to rotate. The crankshaft drives the piston in the cylinder to rotate to compress the refrigerant in the cylinder. The compressed refrigerant can be discharged through the exhaust hole on the flange and enter the muffler, and then can be discharged from the exhaust port on the flange.

[0003] The applicant has discovered that the prior art has at least the following technical problems:

[0004] In rotary compressors, airflow noise is one of the main noise components of the compressor. This is generally due to the high gas velocity discharged from the flange during the exhaust process of the rotary compressor, which has a certain impact on the top of the muffler and generates noise. However, in the existing technology, the muffler cavity is generally fixed and the muffler has no buffering effect on the airflow. Summary of the Invention

[0005] The present invention aims to provide a variable-volume muffler and compressor, resolving the prior art technical problem that gas discharged from the flange can impact the muffler's top, while the conventional muffler's typically fixed volume makes it difficult to buffer the impacting airflow. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The present invention provides a variable-volume silencer, comprising a movable silencer part, a silencer fixing part and an elastic structure, wherein the silencer fixing part is fixedly connected to the flange, the silencer fixing part is sleeved outside the movable silencer part, one end of the elastic structure is connected to the movable silencer part and the other end is fixed, and the airflow entering the silencer from the flange exhaust inlet can impact the movable silencer part, causing the movable silencer part to move away from the flange to increase the volume of the silencer.

[0008] Furthermore, the movable silencer is connected to the flange through the elastic structure.

[0009] Furthermore, the silencer also includes an inner silencer, the movable silencer portion is connected to the inner silencer via the elastic structure, and the inner silencer is arranged in the silencer fixing portion and fixedly connected to the silencer fixing portion.

[0010] Furthermore, the muffler fixed portion has a contact structure for reducing friction with the movable muffler portion; or / and

[0011] The innermost movable muffler is provided with a flange shaft mounting hole, the flange shaft passes through the flange shaft mounting hole, and the movable muffler has a contact structure for reducing friction between the movable muffler and the flange shaft.

[0012] Furthermore, one end of the movable silencer close to the flange end surface extends outwardly away from the flange center axis to form a limiting section for limiting the separation of the movable silencer, and a vibration-damping structure exists between the limiting section and the surface cooperating with the limiting section.

[0013] Furthermore, the number of the movable silencers is at least two, and the movable silencers are sequentially arranged from the inside to the outside. The movable silencer arranged on the innermost layer is provided with a flange shaft mounting hole, and the movable silencer arranged on the outermost layer is arranged in the silencer fixing part. Each of the movable silencers is provided with the elastic structure, and the movable silencer can move away from the flange under the impact of the airflow.

[0014] Furthermore, a contact structure for reducing friction between the two adjacent movable silencers is provided on the outer movable silencers, and the two are connected via the contact structure.

[0015] Furthermore, the contact structure includes a mounting groove and a rolling element, the rolling element is arranged in the mounting groove, and the mounting groove is opened on the silencer fixed part and / or the movable silencer part.

[0016] Furthermore, the vibration-damping structure includes a vibration-damping rubber and a groove cooperating with the vibration-damping rubber, and one of the vibration-damping rubber and the groove is arranged on the limiting section, and the other is arranged on a surface cooperating with the limiting section.

[0017] A compressor comprises the variable-volume muffler.

[0018] The present invention provides a variable-volume silencer, comprising a movable silencer portion, a silencer fixed portion and an elastic structure, wherein one end of the elastic structure is connected to the movable silencer portion and the other end is fixed. When the compressor is exhausting, a large amount of high-pressure gas is compressed into the variable-volume silencer. Under the action of the gas impact, the movable silencer portion moves away from the flange, causing the volume of the silencer to change. When the volume changes, the airflow can slow down the impact on the silencer and reduce the impact noise, thereby achieving a noise reduction effect. This solves the technical problem in the prior art that the gas discharged from the flange will have a certain impact on the top of the silencer, while the volume cavity of the existing silencer is usually fixed and unchanged, making it difficult to achieve a buffering effect on the impacting airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 2 is a schematic cross-sectional view of a double-layer variable volume muffler (the compressor is in the suction state) provided by an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of

[0022] Figure 3 2 is a schematic cross-sectional view of a double-layer variable volume muffler (the compressor is in exhaust state) provided in an embodiment of the present invention;

[0023] Figure 4 1 is a schematic top view of a double-layer variable volume muffler provided by an embodiment of the present invention;

[0024] Figure 5 2 is a schematic cross-sectional view of a single-layer variable volume muffler (when there is only one movable muffler) provided in an embodiment of the present invention;

[0025] Figure 6 It is a schematic cross-sectional view of a single-layer variable volume muffler (when there are two movable mufflers) provided by an embodiment of the present invention.

[0026] In the figure, 1-flange; 11-flange shaft; 12-flange exhaust inlet; 13-flange exhaust outlet; 2-elastic structure; 3-gas containing chamber; 4-movable silencer; 41-limiting section; 5-vibration reduction structure; 51-vibration reduction rubber; 52-groove; 6-inner silencer; 61-through hole; 62-air outlet; 7-silencer fixing part; 8-rolling element; 9-flange mounting hole. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 4The present invention provides a variable-volume muffler, comprising a movable muffler 4, a muffler fixing portion 7, and an elastic structure 2. The muffler fixing portion 7 is fixedly connected to the flange 1 and sleeved on the outside of the movable muffler 4. The elastic structure 2 is connected to the movable muffler 4 at one end and fixed at the other end. The airflow entering the muffler from the flange exhaust inlet 12 can impact the movable muffler 4, causing the movable muffler 4 to move away from the flange 1 to increase the volume of the muffler. When the compressor is exhausting, a large amount of high-pressure gas is compressed into the variable-volume muffler. Under the action of the gas impact, the movable muffler 4 moves away from the flange 1, increasing the volume of the muffler. The airflow can slow down the impact on the muffler when the volume changes, reducing the impact noise, thereby achieving a noise reduction effect. When the compressor is inhaling, the movable muffler 4 contracts under the action of the elastic structure 2, that is, moves toward the flange 1, and the remaining gas is discharged from the variable-volume muffler. The present invention provides a variable-volume muffler, which can achieve airflow buffering, reduce compressor noise, and improve user experience by making the volume of the muffler variable.

[0029] As an optional implementation method of the embodiment of the present invention, see Figure 5-Figure 6 The movable muffler 4 is connected to the flange 1 via the elastic structure 2. The variable volume muffler can be a single-layer structure. The flange 1 is provided with a flange exhaust inlet 12 and a flange exhaust outlet 13. The gas that enters the muffler fixed part 7 and the movable muffler 4 through the flange exhaust inlet 12 can be discharged through the flange exhaust outlet 13.

[0030] See also Figure 1-Figure 4 The silencer also includes an inner silencer 6. The movable silencer portion 4 is connected to the inner silencer 6 through the elastic structure 2. The inner silencer 6 is arranged in the silencer fixing portion 7 and is fixedly connected to the silencer fixing portion 7. The variable volume silencer can also be a double-layer structure. In this case, a gas accommodating chamber 3 is formed inside the inner silencer 6, and another gas accommodating chamber 3 is formed outside the inner silencer 6 and inside the silencer fixing part 7 and the movable silencer part 4; when the compressor is in the exhaust state, the gas enters the inner silencer 6 through the flange exhaust inlet 12, and the gas in the inner silencer 6 enters the gas accommodating chamber 3 formed by the inner silencer 6, the silencer fixing part 7 and the movable silencer part 4 through the gap between the inner silencer 6 and the flange shaft 11. At this time, the airflow will impact the movable silencer part 4 and move it away from the flange to increase the volume of the silencer, and the elastic structure 2 is in a stretched state; when the compressor is in the exhaust state, the gas in the gas accommodating chamber 3 is discharged through the air outlet 62 and the flange exhaust outlet 13, and the movable silencer part 4 contracts under the action of the elastic structure 2, and the remaining gas in the other gas accommodating chamber 3 is discharged from the flange exhaust outlet 13.

[0031] As an optional embodiment of the present invention, the muffler fixed portion 7 has a contact structure for reducing friction with the movable muffler portion 4. The contact structure may include a mounting groove and a rolling element 8, see Figure 1 and Figure 2 A mounting groove is provided on one end of the silencer fixed part 7 that cooperates with the movable silencer part 4, in which a rolling member 8 is provided. The rolling member 8 can be a ring member with a circular cross-section and is in contact with the movable silencer part 4. The rolling member 8 can rotate clockwise or counterclockwise in the mounting groove to reduce the friction between the silencer fixed part 7 and the movable silencer part 4.

[0032] As an optional embodiment of the present invention, the innermost movable muffler 4 is provided with a flange shaft mounting hole, the flange shaft 11 passes through the flange shaft mounting hole, and a contact structure is provided on the movable muffler 4 to reduce friction between the movable muffler 4 and the flange shaft 11. The contact structure may include a mounting groove and a rolling element 8, see Figure 1 and Figure 3 A mounting groove is provided on the wall of the flange shaft mounting hole, and a rolling member 8 is provided in the mounting groove. The rolling member 8 can be a ring member with a circular cross-section and is in contact with the flange shaft 11. The rolling member 8 can rotate clockwise or counterclockwise in the mounting groove to reduce the friction between the movable muffler 4 and the flange shaft 11.

[0033] As an optional implementation method of the present invention, one end of the movable muffler 4 near the flange end surface extends outward away from the flange center axis to form a limit section 41 for limiting the separation of the movable muffler 4. A vibration-damping structure 5 is located between the limit section 41 and the surface that cooperates with the limit section 41. The vibration-damping structure 5 is used to reduce collisions and thus reduce the noise of the compressor. The vibration-damping structure 5 may include a vibration-damping rubber 51 and a groove 52 that cooperates with the vibration-damping rubber 51. One of the vibration-damping rubber 51 and the groove 52 is disposed on the limit section 41, and the other is disposed on the surface that cooperates with the limit section 41. Figure 1 and Figure 2 , the limiting section 41 of the movable muffler 4 (the movable muffler 4 arranged on the outermost layer) can be provided with an annular vibration-damping rubber 51, and the muffler fixing portion 7 can be provided with a groove 52, see Figure 3 When the compressor is in the exhaust state, the vibration-damping rubber 51 arranged on the outermost movable silencer part 4 can be located in the groove 52 on the silencer fixing part 7 to reduce the noise generated by the collision between the movable silencer part 4 and the silencer fixing part 7 (silencer fixing part 7).

[0034] See also Figure 1 Between two adjacent active mufflers 4, a vibration-damping rubber 51 may be provided on the limiting section 41 of the inner active muffler 4, and a groove 52 may be provided on the outer active muffler 4. Figure 3When the compressor is in the exhaust state, the vibration-damping rubber 51 provided on the inner movable silencer 4 can be located in the groove 52 provided on the outer movable silencer 4 to reduce the noise generated by the collision of two adjacent movable silencers 4.

[0035] As an optional implementation method of the embodiment of the present invention, see Figure 1 and Figure 3 There are at least two movable silencers 4, which are arranged in sequence from the inside to the outside. The innermost movable silencer 4 is provided with a flange shaft mounting hole. The outermost movable silencer 4 is connected to the silencer fixing part 7 and is sleeved inside the silencer fixing part 7. Each movable silencer 4 is provided with an elastic structure 2. The movable silencer 4 can move away from the flange 1 under the impact of the airflow. Figure 1 、 Figure 3 as well as Figure 6 The movable silencer 4 arranged on the outermost layer is connected to the silencer fixing portion 7 and the silencer fixing portion 7 limits the maximum upward movement distance of the movable silencer 4 arranged on the outermost layer; among the remaining two adjacent movable silencers 4, the movable silencer 4 arranged on the outer layer can limit the maximum upward movement distance of the movable silencer 4 arranged on the inner layer.

[0036] As an optional implementation method of the embodiment of the present invention, the number of movable silencers 4 can be two, or other numbers of movable silencers 4 can be set. The number of movable silencers 4 can be selected according to actual conditions. When the number of movable silencers 4 is two, see Figure 1 、 Figure 3 and Figure 6 The movable muffler 4 arranged on the outer layer has a limiting section 41 thereon that cooperates with the muffler fixing section 7, that is, the muffler fixing section 7 limits the maximum upward movement distance of the movable muffler 4 of the outer layer through the limiting section 41 on the movable muffler 4 of the outer layer; when the movable muffler 4 of the outer layer moves upward to the maximum distance, it can limit the upward movement distance of the movable muffler 4 arranged on the inner layer; see Figure 5 , which illustrates the case where the number of the movable silencer 4 is one.

[0037] As an optional embodiment of the present invention, a contact structure for reducing friction between the two adjacent movable mufflers 4 is provided on the outer layer of the movable mufflers 4 and the two are connected through the contact structure. The contact structure includes a mounting groove and a rolling element 8, see Figure 1 and Figure 3 A mounting groove is provided at one end of the outer movable silencer 4 near the center, and a rolling member 8 is provided in the mounting groove. The rolling member 8 can be a ring member with a circular cross-section. The rolling member 8 can rotate clockwise or counterclockwise in the mounting groove to reduce the friction between the two adjacent movable silencers 4.

[0038] As an optional embodiment of the present invention, the elastic structure 2 is a spring. On each movable muffler 4, multiple springs can be provided along the circumferential direction of the movable muffler 4, and the springs connect between the limiting section 41 of the movable muffler 4 and the inner layer muffler 6 (or flange 1).

[0039] Example 1:

[0040] See also Figure 1-Figure 4 A variable volume silencer comprises a movable silencer 4, a silencer fixing portion 7 and an inner silencer 6; the number of movable silencer portions 4 can be two, and the movable silencer portions 4 are sequentially sleeved from the inside to the outside, and a flange shaft mounting hole is provided on the innermost movable silencer portion 4, and the outermost movable silencer portion 4 is connected to the silencer fixing portion 7 and sleeved in the silencer fixing portion 7, and each movable silencer portion 4 is connected to the inner silencer 6 through a spring; a through hole 61 is provided on the inner silencer 6 that matches the flange shaft 11, and the gas entering the inner silencer 6 from the flange exhaust inlet 12 can enter through the gap between the inner silencer 6 and the flange shaft 11 Another gas accommodating chamber 3; the inner silencer 6 is provided with an outlet hole 62 connected with the flange exhaust outlet 13 and the gas accommodating chamber 3, and the inner silencer 6 and the silencer fixing part 7 are both provided with flange mounting holes; one end of each movable silencer 4 close to the end face of the flange 1 extends outward in the horizontal direction to form a limiting section 41 for limiting its own separation, and a vibration-damping structure 5 is present between the limiting section 41 and the surface matching the limiting section 41; the movable silencer 4 arranged in the inner layer and the flange shaft 11, between two adjacent movable silencers 4, and the movable silencer 4 arranged in the outer layer and the silencer fixing part 7 are respectively connected by contact structures for reducing friction.

[0041] Example 2:

[0042] See also Figure 5 A variable-volume silencer includes a movable silencer 4 and a silencer fixing part 7; there is only one movable silencer 4, which is connected to the flange 1 through a spring, and the silencer fixing part 7 is sleeved outside the movable silencer 4. A flange mounting hole 9 is provided on the silencer fixing part 7; the movable silencer 4 and the flange shaft 11, as well as the movable silencer 4 and the silencer fixing part 7, are respectively connected by contact structures for reducing friction; the end of the movable silencer 4 farthest from the end face of the flange 1 extends outward in the horizontal direction to form a limiting section 4 for limiting itself from separating from the silencer fixing part 7, and a vibration damping structure 5 is provided between the limiting section 4 and the silencer fixing part 7.

[0043] Example 3:

[0044] See also Figure 6, a variable volume silencer, which is different from Example 2 in that there are two movable silencers 4, and the movable silencers 4 are sequentially arranged from the inside to the outside.

[0045] Example 4:

[0046] A compressor includes the variable-volume muffler described in Example 1, Example 2, or Example 3.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A variable volume muffler, characterized in that: It comprises a movable muffler part (4), a muffler fixing part (7) and an elastic structure (2), wherein: The muffler fixing portion (7) is fixedly connected to the flange (1), and the muffler fixing portion (7) is sleeved outside the movable muffler portion (4). One end of the elastic structure (2) is connected to the movable muffler portion (4) and the other end is fixed. The airflow entering the muffler from the flange exhaust inlet (12) can impact the movable muffler portion (4), causing the movable muffler portion (4) to move in a direction away from the flange (1) to increase the volume of the muffler. The muffler further comprises an inner muffler (6), the movable muffler portion (4) is connected to the inner muffler (6) via the elastic structure (2), and the inner muffler (6) is arranged in the muffler fixing portion (7) and fixedly connected to the muffler fixing portion (7); The number of the movable silencer parts (4) is at least two, and the movable silencer parts (4) are sequentially sleeved from the inside to the outside. The movable silencer part (4) arranged in the innermost layer is provided with a flange shaft mounting hole, and the movable silencer part (4) arranged in the outermost layer is sleeved in the silencer fixing part (7). Each of the movable silencer parts (4) is provided with the elastic structure (2), and the movable silencer part (4) can move in a direction away from the flange (1) under the impact of airflow.

2. The variable volume muffler according to claim 1, characterized in that: The movable silencer (4) is connected to the flange (1) via the elastic structure (2).

3. The variable volume muffler according to claim 1, characterized in that: The muffler fixed portion (7) has a contact structure for reducing friction with the movable muffler portion (4); or / and The innermost movable muffler (4) is provided with a flange shaft mounting hole, the flange shaft (11) passes through the flange shaft mounting hole, and the movable muffler (4) has a contact structure for reducing friction between the movable muffler (4) and the flange shaft (11).

4. The variable volume muffler according to claim 3, characterized in that: One end of the movable muffler (4) close to the flange end surface extends outward in a direction away from the flange shaft (11) to form a limiting section (41) for limiting the separation of the movable muffler (4), and a vibration-damping structure (5) is present between the limiting section (41) and a surface that cooperates with the limiting section (41).

5. The variable volume muffler according to claim 1, characterized in that: Of the two adjacent movable silencers (4), a contact structure for reducing friction between the two is present on the outer movable silencers (4), and the two are connected via the contact structure.

6. The variable volume muffler according to claim 3 or 5, characterized in that: The contact structure comprises a mounting groove and a rolling element (8), wherein the rolling element (8) is arranged in the mounting groove, and the mounting groove is provided on the muffler fixed portion (7) and / or the movable muffler portion (4).

7. The variable volume muffler according to claim 4, characterized in that: The vibration-damping structure (5) comprises a vibration-damping rubber (51) and a groove (52) matched with the vibration-damping rubber (51); one of the vibration-damping rubber (51) and the groove (52) is arranged on the limiting section (41), and the other is arranged on a surface matched with the limiting section (41).

8. A compressor, characterized in that: A variable volume muffler comprising the variable volume muffler according to any one of claims 1 to 7.

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