JP7602035B2 - Silencers and air conditioners - Google Patents

Description

RELATED APPLICATIONS This application claims priority to a Chinese patent application filed on January 7, 2021, bearing application number 202120040590.6 and entitled "Muffler and Air Conditioner", the entire contents of which are incorporated herein by reference.

This application relates to the technical field of air conditioning components, and in particular to mufflers and air conditioning devices.

In the field of cooling technology, the problem of vibration and noise in the pipelines of air conditioners has already become a major challenge in product development, and to solve the above problem, silencers are usually installed in the equipment to reduce the vibration and noise of the pipelines of the air conditioners.

To further reduce the noise generated when the refrigerant medium passes through the silencer, a sound-absorbing plate is usually provided inside the cylinder of the silencer, and the sound-absorbing plate and the cylinder are fixed by welding. However, welding is prone to problems such as poor welding and welding leaks, which reduces the strength of the connection between the sound-absorbing plate and the cylinder. Impact from the refrigerant medium can cause the connection between the sound-absorbing plate and the cylinder to break.

In light of this, there is a need to provide a cylinder and an air conditioning device that solves the problem in the prior art that the connection between the sound-absorbing plate and the cylinder is not sufficiently robust.

The present application provides a sound muffler including a cylindrical body, a sound absorbing chamber provided in the sound absorbing chamber, and limiting protrusions provided on the inner wall of the sound absorbing chamber, the limiting protrusions being in contact with both sides of the sound absorbing plate so as to limit the movement of the sound absorbing plate within the sound absorbing chamber.

In one embodiment of the present application, the limiting protrusion is formed to protrude from the side wall of the cylinder in the radial direction of the cylinder. In this way, the difficulty of processing the limiting protrusion is significantly reduced.

In one embodiment of the present application, the maximum height of the limiting protrusion protruding from the inner wall of the sound-absorbing chamber is 0.5 mm to 0.8 mm. Since the maximum height of the limiting protrusion protruding from the inner wall of the sound-absorbing chamber is 0.5 mm or more, this is advantageous for the limiting protrusion to exert a good sound-absorbing effect on the sound-absorbing plate. On the other hand, since the maximum height of the limiting protrusion protruding from the inner wall of the sound-absorbing chamber is 0.8 mm or less, this is advantageous for reducing the difficulty of processing the limiting protrusion.

In one embodiment of the present application, the limiting protrusions that abut on either side of the sound-absorbing plate also include a number of cams that are spaced apart and are uniformly distributed around the circumference of the sound-absorbing chamber. The cams are easy to process and do not require a high degree of processing of the cylinder, which prevents the cylinder from deforming significantly and breaking.

In one embodiment of the present application, the sound absorbing plate is provided in the center of the cylinder, the peripheral wall of the sound absorbing plate is abutted against the inner wall of the sound absorbing chamber, and the sound absorbing plate is provided with a plurality of through holes penetrating the sound absorbing plate. In this way, the sound absorbing plate has a better sound absorbing effect.

In one embodiment of the present application, the sound absorbing plate includes a circular bottom plate and side plates surrounding the periphery of the bottom plate, and the outer peripheral walls of the side plates are firmly engaged with the inner walls of the sound absorbing chamber. This increases the contact area between the sound absorbing plate and the inner walls of the sound absorbing chamber, making the connection between the sound absorbing plate and the inner walls of the sound absorbing chamber more robust. In addition, the presence of the side plates makes it difficult for the sound absorbing plate to tilt during the installation process, improving the assembly accuracy of the entire silencer.

The through holes are concentrated in the central region of the base plate. If the radius of the base plate is R and the central region is defined as the region surrounded by a circle whose center is the center of the base plate and whose radius is r, then r≦R/2. This makes the distribution of the through holes on the sound-absorbing plate more concentrated, and the entire silencer has a better sound-absorbing effect.

In one embodiment of the present application, the cylinder is made of stainless steel material, and the silencer further includes a connection segment and a transition segment connecting the connection segment and the cylinder, the inner diameter of the connection segment is smaller than the inner diameter of the cylinder, a copper bush is fitted to the outside of the connection segment, and the length of the copper bush fitted to the connection segment is 60% or less of the total length of the copper bush. By providing connection segments with small inner diameters at both ends of the cylinder, connection ports with small inner diameters can be formed at both ends of the cylinder, so that the size of both connection segments can be matched to the size of the pipe port of the pipeline (not shown) inside the air conditioner, and further, it is easy to fixedly connect the silencer and the pipeline inside the air conditioner. Fitting the copper bush on the outside of the connection segment is advantageous for better welding between the silencer and the pipeline inside the air conditioner.

In one embodiment of the present application, a step is provided on the outer wall of the end of the connection segment remote from the cylinder, and the copper bush is connected to the step. By providing the step, it is easier to position the copper bush on the connection segment, improving the assembly accuracy of the copper bush and the connection segment.

In one embodiment of the present application, a chamfer is provided on the side of the step away from the axis of the connection segment. This makes it possible to prevent burrs from being generated on the edge of the step away from the axis of the connection segment during the processing of the step.

The present application further provides an air conditioning device including a muffler according to any of the above embodiments.

The silencer and air conditioner provided by the present application have limiting protrusions on the inner wall of the silencing chamber, and the limiting protrusions are provided on both sides of the sound-absorbing plate, so that the limiting protrusions act as good limits for the sound-absorbing plate and prevent the sound-absorbing plate from moving within the silencing chamber, thereby strengthening the connection between the sound-absorbing plate and the cylinder. Therefore, the silencer provided by the present application solves the problem in the prior art that the connection between the sound-absorbing plate and the cylinder is not robust enough.

FIG. 2 is a cross-sectional view of a silencer according to an embodiment of the present application. FIG. 2 is a partially enlarged view of A shown in FIG. FIG. 2 is a top view of a sound-absorbing panel according to an embodiment of the present application.

1 Cylinder, 11 Sound-absorbing chamber, 12 Limiting protrusion, 121 Cam, 2 Sound-absorbing plate, 21 Through hole, 22 Bottom plate, 221 Center region, 23 Side plate, 3 Connection segment, 31 Step, 32 Chamfer, 4 Transition segment, 5 Copper bush.

The technical aspects of the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, but it goes without saying that the described embodiments are merely some of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be obtained by a person skilled in the art without creative efforts based on the embodiments of the present application are all within the scope of protection of the present application.

Note that when an assembly is said to be "built into" another assembly, it may be built directly into the other assembly, or there may be an intervening assembly present. When an assembly is said to be "mounted" on another assembly, it may be mounted directly on the other assembly, or there may be an intervening assembly present at the same time. When an assembly is said to be "fixed" to another assembly, it may be fixed directly to the other assembly, or there may be an intervening assembly present at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of this application. Terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and/or" as used herein includes one or more of any and all combinations of the associated items.

As shown in Figs. 1 to 3, the present application provides a silencer mainly applied to air conditioners. Specifically, the silencer includes a cylinder 1, a connection segment 3, and a transition segment 4 connecting the connection segment 3 and the cylinder 1. The cylinder 1 is provided with a sound absorbing chamber 11, and a sound absorbing plate 2 is provided in the sound absorbing chamber 11. The inner wall of the sound absorbing chamber 11 is provided with a limiting protrusion 12, which is abutted against both sides of the sound absorbing plate 2 so as to limit the movement of the sound absorbing plate 2 in the sound absorbing chamber 11. The sound absorbing plate 2 is usually provided in the middle of the cylinder 1, and the peripheral wall of the sound absorbing plate 2 is abutted against the inner wall of the sound absorbing chamber 11. In addition, the sound absorbing plate 2 is provided with a plurality of through holes 21 penetrating the sound absorbing plate 2. In this way, the sound absorbing plate 2 has a better sound absorbing effect.

In one embodiment, the limiting protrusion 12 may be formed by protruding from the side wall of the cylinder 1 along the radial direction of the cylinder 1. In this way, the processing difficulty of the limiting protrusion 12 is greatly reduced, and after the sound-absorbing plate 2 is assembled into the sound-absorbing chamber 11, the side walls of the cylinder 1 on both sides of the sound-absorbing plate 2 can be pressed and processed along the radial direction of the cylinder 1 to form the limiting protrusion 12, that is, the assembly of the silencer becomes easier. The limiting protrusion 12 may be welded to the inner wall of the silencer, and the welding difficulty of the limiting protrusion 12 is much lower than the welding difficulty of the sound-absorbing plate 2, the welding between the limiting protrusion 12 and the inner wall of the cylinder 1 is more robust, and the limiting protrusion 12 is less likely to move even if the sound-absorbing plate 2 is impacted by the refrigerant. Regardless of the molding method of the limiting protrusion 12, the connection between the sound-absorbing plate 2 and the cylinder 1 can be made more robust. That is, the silencer provided by this application solves the problem in the prior art that the connection between the sound-absorbing plate 2 and the cylinder 1 is not sufficiently robust.

Furthermore, the maximum height of the limiting protrusion 12 protruding from the inner wall of the sound-absorbing chamber 11 is 0.5 mm to 0.8 mm. Since the maximum height of the limiting protrusion 12 protruding from the inner wall of the sound-absorbing chamber 11 is 0.5 mm or more, this is advantageous for the limiting protrusion 12 to exert a good sound-absorbing effect on the sound-absorbing board 2. On the other hand, since the maximum height of the limiting protrusion 12 protruding from the inner wall of the sound-absorbing chamber 11 is 0.8 mm or less, this is advantageous for reducing the difficulty of processing the limiting protrusion 12.

When the limiting protrusion 12 is formed by the side wall of the cylindrical body 1 protruding along the radial direction of the cylindrical body 1, the structure of the limiting protrusion 12 may be different. In this embodiment, as shown in FIG. 1, the limiting protrusion 12 that abuts on either side of the sound-absorbing board 2 includes a plurality of cams 121 arranged at intervals, and the cams 121 are uniformly distributed along the circumferential direction of the sound-absorbing chamber 11. In this way, when the sound-absorbing board 2 is assembled into the sound-absorbing chamber 11, the sound-absorbing board 2 can be sandwiched at a fixed position in the sound-absorbing chamber 11 simply by pressing the uniformly distributed cams 121 at corresponding position intervals against the outside of the cylindrical body 1. The cams 121 are easy to process, and the degree of processing of the cylindrical body 1 is not high, so that the cylindrical body 1 is prevented from being greatly deformed and broken. However, the present invention is not limited to this, and the annular limiting protrusion 12 may be formed in one revolution by processing a ring-shaped groove in the circumferential direction of the outer wall of the cylindrical body 1, so that the inner wall of the cylindrical body 1 protrudes toward the axis of the cylindrical body 1. The annular limiting protrusion 12 is processed and molded using a rotary shrink processing method, and has high processing precision.

In one embodiment, as shown in Figs. 1 and 3, the sound absorbing plate 2 includes a circular bottom plate 22 and a side plate 23 that surrounds the periphery of the bottom plate 22, and the outer peripheral wall of the side plate 23 is firmly engaged with the inner wall of the sound absorbing chamber 11. This increases the contact area between the sound absorbing plate 2 and the inner wall of the sound absorbing chamber 11, making the connection between the sound absorbing plate 2 and the inner wall of the sound absorbing chamber 11 more robust. In addition, the presence of the side plate 23 makes it difficult for the sound absorbing plate 2 to tilt during the installation process, improving the assembly accuracy of the entire silencer.

Furthermore, as shown in FIG. 3, the through holes 21 are concentrated and distributed within the central region 221 of the bottom plate 22. If the radius of the bottom plate 22 is R and the central region 221 is defined as a region formed by a circle whose center is the center of the bottom plate 22 and whose radius is r, then r≦R/2. By doing so, the distribution of the through holes 21 on the sound-absorbing plate 2 becomes more concentrated, and the entire silencer has a better sound-absorbing effect.

In one embodiment, as shown in FIG. 1, the inner diameter of the connection segment 3 is smaller than the inner diameter of the cylinder 1. Specifically, the inner diameter of the transition segment 4 gradually decreases from one end connected to the cylinder 1 to the other end connected to the connection segment 3, so that the internal space located at both ends of the axial direction of the silencer gradually decreases, thereby effectively preventing the sound-absorbing plate 2 fixed in the cylinder 1 from escaping from both ends of the cylinder 1. Next, the transition segment 4 can smoothly connect the connection segment 3 and the cylinder 1, which have different inner diameters. By providing the connection segment 3 with a small inner diameter at both ends of the cylinder 1, it is possible to form a connection port with a small inner diameter at both ends of the cylinder 1, so that the size of both of the two connection segments 3 can be matched to the size of the pipe port of the pipeline (not shown) inside the air conditioner, and further, it is easy to fix the silencer and the pipeline inside the air conditioner. Usually, the cylinder 1 is made of stainless steel material in order to reduce the manufacturing cost of the silencer. However, since the pipeline inside the air conditioner is usually made of copper, a copper bushing 5 is fitted to the outside of the connection segment 3 to better weld the silencer and the pipeline inside the air conditioner. In addition, the length of the copper bushing 5 fitted to the connection segment 3 is 60% or less of the total length of the copper bushing 5.

Furthermore, as shown in FIG. 2, a step 31 is provided on the outer wall of the end of the connection segment 3 remote from the cylindrical body 1, and the copper bush 5 is connected to the step 31. Providing the step 31 makes it easier to position the copper sleeve on the connection segment 3, improving the assembly accuracy of the copper sleeve and the connection segment 3.

Furthermore, as shown in FIG. 2, a chamfer 32 is provided on the side of the step 31 that is away from the axis of the connection segment 3. This makes it possible to prevent burrs from being generated on the edge of the step 31 that is away from the axis of the connection segment 3 during the processing of the step 31.

The cylinder 1, transition segment 4 and connection segment 3 are of an integrally molded structure; specifically, when processing the silencer, first, a rotational shrinkage process is performed on one axial end of the cylinder 1, the transition segment 4 and connection segment 3 are processed on this end, and then the sound-absorbing plate 2 is inserted into the sound-absorbing chamber 11 from the end of the cylinder 1 that has not been subjected to the rotational shrinkage process, and the sound-absorbing plate 2 and the inner wall of the cylinder 1 are fixedly connected, and finally, the end of the cylinder 1 that has not been subjected to the rotational shrinkage process is subjected to the rotational shrinkage process. After one end of the cylinder 1 is rotated and shrunk, the sound-absorbing plate 2 is inserted. When using a brazing method, solder must be inserted and then the other end of the cylinder 1 must be rotated and shrunk. The rotation and shrink process involves drawing oil or saponification liquid, so cleaning is required after rotation and shrink is completed. If cleaning is insufficient and oil stains adhere to the solder, it will affect the welding quality of the sound-absorbing plate 2. When using laser welding or argon arc welding, there is no solder, but the cylinder 1 is relatively deep, so it is not easy to insert the welded joint deep into the cylinder 1. This application uses the limiting protrusion 12 to solve the problems of contamination and convenience that exist in conventional welding methods.

The present application further provides an air conditioner including a muffler according to any of the above embodiments. The muffler is fixedly connected to a pipeline inside the air conditioner by two connection segments 3 at both ends of the cylindrical body 1.

The technical features of the above-described embodiments may be combined in any desired manner. For the sake of brevity, not all possible combinations of the technical features of the above-described embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, all combinations should be considered to be within the scope of the present specification.

Those skilled in the art should recognize that the above embodiments are merely for the purpose of illustrating the present application and are not to be used as limitations to the present application, and that any reasonable modifications and variations made to the above embodiments within the substantial spirit of the present application are within the scope of the protection sought by the present application.

Claims (9)

The device includes a cylindrical body, the cylindrical body being provided with a sound-absorbing chamber, a sound-absorbing plate being provided within the sound-absorbing chamber, and a limiting protrusion being provided on an inner wall of the sound-absorbing chamber, the limiting protrusion being in contact with both sides of the sound-absorbing plate so as to limit the movement of the sound-absorbing plate within the sound-absorbing chamber,
The sound absorbing plate includes a circular bottom plate that is disposed perpendicular to the axial direction of the cylinder, and a side plate that is disposed so as to surround the periphery of the bottom plate and bend from the periphery of the bottom plate in parallel to the axial direction of the cylinder, the circular bottom plate is provided with a plurality of through holes, and the outer peripheral wall of the side plate is firmly engaged by abutting against the inner wall of the sound absorbing chamber,
The plurality of through holes are distributed in a concentrated manner within a central region of the bottom plate, and when the radius of the bottom plate is R and the central region is defined as a region surrounded by a circle having a radius r and a center at the center of the bottom plate, r≦R/2.
Silencer. The silencer according to claim 1, wherein the limiting protrusion is formed by protruding from the side wall of the cylinder along the radial direction of the cylinder. The muffler according to claim 2, wherein the maximum height of the limiting protrusion protruding from the inner wall of the muffler chamber is 0.5 mm to 0.8 mm. The muffler of claim 2, wherein the limiting protrusions that abut on either side of the sound-absorbing plate include a plurality of spaced cams that are uniformly distributed around the circumference of the muffler chamber. The silencer according to claim 1 , wherein the sound absorbing plate is provided in a central portion of the cylindrical body. The muffler according to claim 1, wherein the cylinder is made of stainless steel, the muffler further includes connection segments provided at both ends of the cylinder, and a transition segment connecting the connection segments and the cylinder, the inner diameter of the connection segments being smaller than the inner diameter of the cylinder, a copper bushing is fitted to the outside of the connection segments, and the length of the portion of the copper bushing that is fitted to the connection segments is 60% or less of the overall length of the copper bushing. 7. The silencer according to claim 6 , wherein a step is provided on an outer wall of one end of the connecting segment remote from the cylindrical body, and the copper bushing is connected to the step. 8. The silencer of claim 7 , wherein the step is provided with a chamfer on a side thereof away from the axis of the connecting segment. An air conditioning system comprising a silencer according to any one of claims 1 to 8 .

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