A silencer and a compressor

Abstract

The present invention relates to a silencer and a compressor, belonging to the field of refrigeration technology. The silencer comprises a silencer wall and a ring plate. The ring plate is arranged on the silencer wall and is provided with a plurality of connection holes for connecting with a flange. The silencer wall is also provided with a center hole for inserting the flange shaft neck. The hole wall of the center hole is composed of at least a first arc wall and a second arc wall. The radius of the first arc wall is the same as the radius of the shaft neck and the center of the first arc wall is located on the central axis of the shaft neck. The second arc wall is folded toward a side close to the ring plate to form a folded edge. An exhaust gap is provided between the folded edge and the shaft neck. The silencer of this structure can adjust the distance between the exhaust gap and the exhaust port of the flange when in use, so its passing frequency can be changed, and precise installation can be achieved. The above-mentioned compressor adopts the above-mentioned silencer, so the passing frequency of the compressor can be adjusted according to the needs of the use scenario when in use, and the noise reduction effect is better.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a muffler and a compressor. Background Art

[0002] In order to reduce the exhaust noise of the compressor, a muffler is usually installed at its flange exhaust port. The traditional muffler is a simple expansion cover plate structure, with several exhaust gaps opened at the upper end of the cover plate. The gas is discharged from the upper flange exhaust port, enters the muffler, and then discharged from the exhaust gap on the muffler, forming a single-chamber expansion muffler. The muffler volume curve of this type of muffler is a sine curve, and there are many pass-through frequencies. The pass-through frequency refers to the noise frequency with zero muffler volume, and the muffler effect is poor.

[0003] In the prior art, the muffler has a central hole that is completely turned up toward the inside of the muffler cavity. When in use, the flanged journal is inserted into the ring formed by the central hole and the inner turning edge. The gap between the journal and the edge of the central hole and the inner turning edge constitutes the exhaust gap of the muffler, thereby forming an expansion muffler with a single inner insert. The passing frequency of this type of muffler is significantly lower than that of the traditional muffler, so its muffler effect is better.

[0004] However, since the exhaust gap of the muffler in the prior art is a full-circle annular gap, the distance between the exhaust gap and the flange exhaust port is a certain value, which makes the muffler's sound reduction curve fixed. Compared with traditional mufflers, it can only eliminate noise with a specific passing frequency and cannot be adjusted according to needs. For example, this type of muffler can eliminate noise in the A band, but the usage scenario requires eliminating noise in the B band, and this type of muffler cannot meet the demand, so its use is subject to certain restrictions.

[0005] In addition, since the above-mentioned annular gap is the actual exhaust hole of the muffler, the muffler needs to be accurately positioned during installation. However, during actual installation, there is usually a certain eccentricity, which causes the flange shaft neck to not be inserted into the center of the annular gap. This will cause fluctuations in the muffler performance and affect the use effect. Summary of the invention

[0006] The present invention provides a muffler for solving the technical problems that the muffler in the prior art cannot adjust the passing frequency eliminated during use as required and the traditional muffler is not easy to be accurately installed, resulting in performance fluctuations.

[0007] The present invention is implemented by the following technical scheme: a muffler, comprising a muffler wall and a ring plate, wherein the ring plate is arranged on the muffler wall and is provided with a plurality of connection holes for connecting with a flange, and the muffler wall is provided with a central hole for inserting a flange journal;

[0008] The hole wall of the center hole is composed of at least a first arc wall and a second arc wall, the radius of the first arc wall is the same as the radius of the shaft neck and the center of the first arc wall is located on the central axis of the shaft neck, and the second arc wall is folded toward the side close to the ring plate to form a folded edge, and there is an exhaust gap between the folded edge and the shaft neck.

[0009] Furthermore, in order to better implement the present invention, the center of the second arc wall is eccentric relative to the central axis of the journal and is located on a side away from the first arc wall.

[0010] Furthermore, in order to better implement the present invention, the first arc wall is a major arc.

[0011] Furthermore, in order to better implement the present invention, the flange has an exhaust port, and the area of ​​the exhaust gap is 0.5 times to 2 times the area of ​​the exhaust port.

[0012] Furthermore, in order to better implement the present invention, the area of ​​the exhaust gap is equal to the area of ​​the exhaust port.

[0013] Furthermore, in order to better implement the present invention, the height of the folded edge is smaller than the height of the muffler.

[0014] Furthermore, in order to better implement the present invention, the height of the folded edge is equal to half or one quarter of the height of the muffler.

[0015] Furthermore, in order to better implement the present invention, the first arc wall is folded toward a side close to the ring plate to form an inner flange, and the height of the inner flange is smaller than the height of the folded edge.

[0016] Furthermore, in order to better implement the present invention, the position where the first arc wall and the second arc wall meet is folded toward a side close to the ring plate to form a sealing edge, and the sealing edge is connected to the folded edge.

[0017] The present invention also provides a compressor, which includes a cylinder, a flange installed on the cylinder and the above-mentioned muffler, the shaft neck of the flange is inserted into the center hole and the first arc wall is in contact with the outer wall of the shaft neck, and an exhaust gap is formed between the second arc wall and the outer wall of the shaft neck.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The silencer provided by the present invention has a connecting hole on the ring plate and the ring plate is arranged on the silencer wall. The silencer wall is provided with a center hole. When in use, the shaft neck of the flange passes through the center hole. The number of the connecting holes is multiple to correspond to the blind hole on the flange. The hole wall of the center hole is composed of at least a first arc wall and a second arc wall. The radius of the first arc wall is the same as the radius of the flange shaft neck. After installation, the center of the first arc wall is located on the central axis of the flange shaft neck. The second arc wall is folded toward the side close to the ring plate to form a folded edge. An exhaust gap is formed between the folded edge and the outer wall of the shaft neck. With this structure, since there is still a folded edge at the exhaust gap, the silencer can also eliminate part of the passing frequency compared with the ordinary silencer, and has a better silencing effect. However, since the exhaust gap is not arranged around the shaft neck, but only occupies Partial sections of a full circle, and because the number of connecting holes is multiple, the present invention can be rotated during installation to change the position of the exhaust gap compared to the flange. Because the exhaust port on the flange is fixed, the distance between the exhaust gap and the exhaust port of the flange can be changed by changing the position of the exhaust gap, thereby changing the passing frequency of the present invention, so that the present invention can adjust the noise frequency that can be eliminated as needed, and has higher practicality. Moreover, since the first arc wall is concentric with the flange journal and has the same radius, during installation, the first arc wall will be in contact with the flange journal to position and limit the present invention. Therefore, the present invention can only rotate compared to the flange journal, and cannot be laterally offset, thereby fixing the size of the exhaust gap, thereby enhancing the stability of the present invention during use and facilitating accurate installation.

[0020] (2) The compressor provided by the present invention adopts the above-mentioned silencer, so when it is used, the passing frequency can be adjusted according to the needs of the use scene, and the noise reduction effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0022] Figure 1 is a schematic structural diagram of the muffler in Example 1;

[0023] Figure 2 yes Figure 1 a cross-sectional view of the structure shown;

[0024] Figure 3 yes Figure 1 Reference diagram for use of the structure shown;

[0025] Figure 4 yes Figure 3 a cross-sectional view of the structure shown;

[0026] Figure 5 yes Figure 1 The reference diagram for use when the structure shown is rotated 90° counterclockwise;

[0027] Figure 6 yes Figure 1 The reference diagram for use when the structure shown is rotated 180° counterclockwise;

[0028] Figure 7 is a schematic structural diagram of the muffler in Example 3;

[0029] Figure 8 yes Figure 7 a cross-sectional view of the structure shown;

[0030] Fig. 9 It is a schematic diagram of the structure of the silencer in Example 4.

[0031] In the figure:

[0032] 1-silencing wall; 11-center hole; 111-first arc wall; 112-second arc wall;

[0033] 2-ring plate; 21-connection hole;

[0034] 3-Folding edge;

[0035] 4- Exhaust clearance;

[0036] 5- Exhaust port;

[0037] 6-Inner turning edge;

[0038] 7- Flange;

[0039] 8- Seal the edges. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] The present embodiment provides a silencer, which includes a silencer wall 1 and a ring plate 2, the ring plate 2 is an annular plate structure, and the ring plate 2 is provided with a plurality of connection holes 21, preferably, the plurality of connection holes 21 are evenly distributed on the ring plate 2, the connection holes 21 are used to connect with the flange 7, and the plurality of connection holes 21 are just opposite to the plurality of blind holes on the flange 7, the silencer wall 1 is a polygonal groove structure and the silencer wall 1 and the silencer wall 1 are open on one side, and the ring plate 2 is arranged on the silencer wall 1, specifically, the inner ring wall of the ring plate 2 is tightly attached to the outer wall of the opening of the silencer wall 1, and optimally, the ring plate 2 is integrally formed with the silencer wall 1. It is worth noting that the flange 7 mentioned here is a flange installed at the compressor cylinder.

[0043] The muffler wall 1 is also provided with a center hole 11 for inserting the journal of the flange 7. Different from the prior art, the center hole 11 on the muffler provided by the present invention is composed of at least a first arc wall 111 and a second arc wall 112, and is preferably composed of the first arc wall 111 and the second arc wall 112 butted end to end, the radius of the first arc wall 111 is the same as the radius of the journal of the flange 7, and the center of the first arc wall 111 is located on the central axis of the journal, while the second arc wall 112 is folded toward the side close to the ring plate to form a folded edge 3, and there is a gap between the folded edge 3 and the journal, and this gap is the exhaust gap 4 of the present invention. Optimally, the folded edge 3 is formed by vertically folding the second arc wall 112.

[0044] With the above structure, when the present invention is installed, the first arc wall 111 will be closely attached to the outer wall of the shaft neck, so as to align and limit the present invention, so that the present invention can only rotate relative to the flange 7 shaft neck, and cannot be laterally offset, so that the size of the above exhaust gap 4 is fixed, thus enhancing the stability of the present invention when in use, and facilitating precise installation. More importantly, since there are multiple connecting holes 21 and they correspond to the blind holes on the flange 7 shaft neck, the present invention can be rotated around the shaft neck center axis during installation to change the position of the exhaust gap 4 relative to the flange 7, because the exhaust port 5 on the flange 7 is fixed, so by changing the position of the above exhaust gap 4, the distance between the exhaust gap 4 and the exhaust port 5 of the flange 7 can be changed, thereby changing the passing frequency eliminated by the present invention, so that the present invention can adjust the noise frequency that it can eliminate as needed, and is more practical.

[0045] As a specific implementation of this embodiment, the center of the second arc wall 112 in this embodiment is eccentric relative to the central axis of the shaft neck and is located on the side away from the first arc wall 111. In this way, the exhaust gap 4 formed between the second arc wall 112 and the shaft neck is in a crescent shape.

[0046] As the best implementation of this embodiment, the first arc wall 111 in this embodiment is a major arc wall, so that when the present invention is installed on the flange 7, the first arc wall 111 will not only be in close contact with the outer wall of the shaft neck, but also the first arc wall 111 will hold the shaft neck, so that the installation of the present invention is more stable. In this case, the second arc wall 112 can be a major arc or a minor arc, and the shape of the second arc wall 112 can also be a curved wall or a right-angle wall, as long as the first arc wall 111 can be in close contact with the shaft neck and wrap it, and an exhaust gap 4 is formed between the second arc wall 112 and the outer wall of the shaft neck.

[0047] As a more preferred embodiment of this embodiment, in this embodiment, the area of ​​the exhaust gap 4 is 0.5 to 2 times the area of ​​the exhaust port 5. In a better embodiment of this embodiment, the area of ​​the exhaust gap 4 is 0.8 to 1.2 times the area of ​​the exhaust port 5. As the best embodiment of this embodiment, the area of ​​the exhaust gap 4 in this embodiment is equal to the area of ​​the exhaust port 5.

[0048] Embodiment 2:

[0049] This embodiment is a more preferred implementation of the above embodiment. The height of the folded edge 3 of this embodiment is less than the height of the entire muffler. Optimally, the height of the folded edge 3 is equal to half or one quarter of the height of the muffler.

[0050] When the height of the silencer is an integer multiple of half the wavelength, the silencer volume is equal to zero. When the height of the folded edge 3 is half the height of the silencer, the odd multiples of the 1 / 2 wavelength can be eliminated. When the height of the folded edge 3 is one quarter of the height of the silencer, the even multiples of the 1 / 2 wavelength can be eliminated, thereby achieving the effect of improving the silencer frequency characteristics.

[0051] In addition, the thickness of the folded edge 3 is 0.5-3 mm. More preferably, the thickness of the folded edge 3 is 1 mm. Most preferably, the thickness of the folded edge 3 is the same as the thickness of the soundproof wall 1 .

[0052] Embodiment 3:

[0053] This embodiment is further improved on the basis of the above embodiment. In this embodiment, the first arc wall 111 is also folded toward the side close to the ring plate to form an inner flange 6. The muffler and the center hole 11 thereon are usually formed by stamping. During the stamping process, if part of the center hole 11 is flanged while the other part is not, it is very easy to cause breakage. Therefore, the first arc wall 111 is also folded toward the side close to the ring plate 2 to form an inner flange 6, which can reduce the probability of breakage.

[0054] Preferably, the height of the inner flange 6 is smaller than the height of the folded edge 3 to save materials.

[0055] Embodiment 4:

[0056] This embodiment is further improved on the basis of Embodiment 1 or 2. In this embodiment, the position where the first arc wall 111 and the second arc wall 112 meet is folded toward the side close to the ring plate 2 to form a sealing edge 8, and the sealing edge 8 is butted against the folded edge 3.

[0057] Although the first arc wall 111 can be tightly attached to the shaft neck, there will still be a gap at the position where the first arc wall 111 is connected to the second arc wall 1112 and the folded edge 3. The position where the first arc wall 111 is connected to the second arc wall 1112 and the folded edge 3 is folded toward the side close to the ring plate 2 to form a sealing edge 8, and the sealing edge 8 is connected to the folded edge 3. In this way, the sealing edge 8 can seal the gap between the first arc wall 111 and the second arc wall 112 and the folded edge 3, thereby avoiding air leakage and further improving the silencer stability and controllability of the silencer in this embodiment.

[0058] Embodiment 5:

[0059] This embodiment provides a compressor, including a cylinder, a flange 7 installed on the cylinder and the above-mentioned muffler, the shaft neck of the flange 7 is inserted into the center hole 11 and the first arc wall 111 is in contact with the outer wall of the shaft neck, and the second arc wall 112 and the folded edge 3 form an exhaust gap 4 with the outer wall of the shaft neck.

[0060] Since the compressor adopts the above-mentioned silencer, the passing frequency can be adjusted according to the needs of the usage scenario during use, and the noise reduction effect is better.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A muffler, characterized in that: It comprises a sound-absorbing wall and a ring plate, wherein the ring plate is arranged on the sound-absorbing wall and is provided with a plurality of connection holes for connecting with the flange, and the sound-absorbing wall is provided with a central hole through which the flange journal is inserted; The hole wall of the central hole is composed of at least a first arc wall and a second arc wall, the radius of the first arc wall is the same as the radius of the shaft neck and the center of the first arc wall is located on the central axis of the shaft neck, the second arc wall is folded toward the side close to the ring plate to form a folded edge, and there is an exhaust gap between the folded edge and the shaft neck; the folded edge is formed by vertically folding the second arc wall; During installation, the shaft neck is rotated around its central axis to change the position of the exhaust gap relative to the flange.

2. A muffler according to claim 1, characterized in that: The center of the second arc wall is eccentric relative to the central axis of the journal and is located on a side away from the first arc wall.

3. A muffler according to claim 2, characterized in that: The first arc wall is a major arc.

4. A muffler according to claim 3, characterized in that: The flange has an exhaust port, and the area of ​​the exhaust gap is 0.5 to 2 times the area of ​​the exhaust port.

5. A muffler according to claim 4, characterized in that: The area of ​​the exhaust gap is equal to the area of ​​the exhaust port.

6. A muffler according to any one of claims 1 to 5, characterized in that: The height of the folded edge is smaller than the height of the muffler.

7. A muffler according to claim 6, characterized in that: The height of the folded edge is equal to half or one quarter of the height of the muffler.

8. A muffler according to any one of claims 1 to 5, characterized in that: The first arc wall is folded toward a side close to the ring plate to form an inner folded edge, and the height of the inner folded edge is smaller than the height of the folded edge.

9. A muffler according to any one of claims 1 to 5, characterized in that: The position where the first arc wall and the second arc wall meet is folded toward a side close to the ring plate to form a sealing edge, and the sealing edge is connected to the folded edge.

10. A compressor, characterized in that: It comprises a cylinder, a flange mounted on the cylinder and a silencer according to any one of claims 1 to 9, wherein the journal of the flange is inserted into the center hole and the first arc wall is in contact with the outer wall of the journal, and an exhaust gap is formed between the second arc wall and the outer wall of the journal.

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