CN206738170U - Muffler and there is its rotary compressor - Google Patents

Abstract

The utility model discloses a kind of muffler and there is its rotary compressor, muffler includes：Silencer cover, silence space is defined in silencer cover, the both ends of silencer cover are respectively equipped with the inlet and outlet connected with silence space, and the entrance point of silencer cover is provided with the connecting portion for being used for being connected with the bearing of rotary compressor；At least one dividing plate, at least one dividing plate are located in silence space and positioned at inlet and outlet between so that silence space is divided into more individual sub- silence spaces, and each dividing plate is connected with silencer cover and is communicated with the through hole of the sub- silence space of its both sides.According to muffler of the present utility model installation, more firm and erasure effect is lifted.

Description

Muffler and rotary compressor having same

technical field

The utility model relates to the technical field of compressors, in particular to a muffler and a rotary compressor with the same.

Background technique

When the rotary compressor is working, the high-pressure gas refrigerant is discharged from the exhaust port of the bearing, which will form a strong pressure sound wave, which is the main noise source of the rotary compressor. The traditional compression mechanism mainly installs a resonance chamber at the exhaust cutout or installs a double-layer muffler at the exhaust port of the bearing. These structures are inconvenient to install and the sound attenuation effect is not ideal. The structure of the muffler still needs to be improved.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the utility model proposes a muffler, the installation of the muffler is more stable and the muffler effect is improved.

The utility model also proposes a rotary compressor with the above-mentioned muffler.

The muffler proposed by the utility model includes: a muffler cover, a muffler space is defined inside the muffler cover, an inlet and an outlet communicating with the muffler space are respectively provided at both ends of the muffler cover, the inlet of the muffler cover The end is provided with a connection part for connecting with the bearing of the rotary compressor; at least one partition is provided in the sound-absorbing space and is located between the inlet and the outlet to silence the sound The space is divided into a plurality of sub-sound-absorbing spaces, and each partition is connected to the sound-absorbing cover and is provided with through holes communicating with the sub-sound-absorbing spaces on both sides thereof.

The silencer provided by the utility model is installed more stably and the noise reduction effect is improved.

In addition, the muffler proposed by the utility model can also have the following additional technical features:

In some embodiments of the present invention, the partitions include a plurality of partitions arranged at intervals, and the through holes on two adjacent partitions are arranged staggered in the distribution direction of the partitions.

In some embodiments of the present utility model, a plurality of the through holes are respectively provided on each of the separators, and the plurality of the through holes are arranged at intervals.

Optionally, the height of the sound absorbing cover extending in the axial direction of the bearing is A, wherein 5mm≤A≤14mm.

Further, the baffle includes a plurality of vertical and parallel to the axial direction of the bearing, the distance between two adjacent baffles is B, and the baffle adjacent to the inlet end is connected to the inlet end. The distance between the end faces is C, and the A, B and C satisfy: when 0.1≤B/A<2/3, 0.1A≤C≤1/3A; when 2/3≤B/A≤0.9, 0.1A≤C≤1/6A.

Optionally, the through hole is formed as a circular hole with a diameter of d, and the diameter of the outer contour of the separator is D, wherein: 0.05≤d/D≤0.49.

Further, the separators include multiple ones arranged in parallel, and the shortest distance between the through holes on two adjacent separators in the extending direction of the separators is L, where 0.51≤L/D≤0.9 .

In some embodiments of the present utility model, the inlet and the outlet are adapted to pass through the rotating shaft, the connecting part is formed as a connecting flange provided on the outer periphery of the inlet end, and the connecting flange is provided with A plurality of connection holes are spaced apart along its circumference, and a shaft hole for penetrating the rotating shaft is provided on the partition, and the through hole is arranged adjacent to the shaft hole.

In some embodiments of the present utility model, the through holes on two adjacent partitions are respectively located on both sides of the shaft hole.

The rotary compressor proposed by the utility model includes: a cylinder, a cylinder cavity is arranged in the cylinder; a main bearing and an auxiliary bearing, the main bearing and the auxiliary bearing are arranged at both axial ends of the cylinder, and the The main bearing is provided with an exhaust hole communicating with the cylinder chamber; the silencer proposed by the utility model, the silencer is arranged on the surface of the side of the main bearing facing away from the cylinder and the exhaust The air hole communicates with the inlet.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a schematic structural view of a muffler according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a muffler according to another embodiment of the present invention;

Fig. 3 is a schematic structural view of a partition of a muffler according to an embodiment of the present invention;

Fig. 4 is a structural schematic diagram of another partition of the muffler according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of the gas flow path in the muffler according to an embodiment of the present invention.

Reference signs:

muffler 100;

Sound absorbing cover 10; Partition plate 20;

silencing space 110; inlet 120; outlet 130; sub-silencing space 101; connecting part 11;

through hole 201; shaft hole 202.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the utility model, but should not be construed as limitations to the utility model. Examples are subject to variation, modification, substitution and variation.

In order to better understand the present application, a brief description of related technologies is given below first. In the related technology, a double-layer muffler is installed at the exhaust port of the bearing, and the double-layer muffler is fixed by screws. At the screw connection, the thickness of the double-layer muffler is relatively large, so that the force distance of the screw is reduced, so that The stability of the structure is affected, the installation is inconvenient and the material consumption is large, and the cost is high.

Considering both the installation and the sound-absorbing effect, the present application proposes a new-structure muffler 100, which is a multi-layer muffler with partitions 20 that does not affect the fixing stability and can significantly eliminate noise.

Referring to FIGS. 1 to 5 , a muffler 100 according to an embodiment of the present invention may include a muffler cover 10 and a partition 20 . A muffler space 110 is defined inside the muffler cover 10 . An inlet 120 is provided at one end of the muffler cover 10 , and an outlet 130 is provided at the other end. The inlet 120 and the outlet 130 communicate with the muffler space 110 respectively. The inlet end of the muffler cover 10 is provided with a connecting portion 11, which can be connected with the bearing of the rotary compressor.

The partition plate 20 is connected to the sound-absorbing cover 10 in various ways, for example, welding, bonding or integral formation can be adopted. The partition plate 20 is provided in the muffler space 110 and between the inlet 120 and the outlet 130 to divide the muffler space 110 into a plurality of sub muffler spaces 101 . Each partition 20 is provided with a through hole 201 , and the through hole 201 communicates with the sub-muffling spaces 101 located on two sides of the partition 20 .

The high-pressure gas carrying sound waves enters the sound-absorbing space 110 from the inlet 120, wherein the high-pressure gas can flow in the two adjacent sub-silencing spaces 101 through the through hole 201, which not only prolongs the flow path, but also allows the gas to communicate with the insulation during the flow process. When the plate 20 collides, a part of the energy is consumed by reflection, which can effectively expand the noise reduction range, and the through hole 201 can be used to eliminate middle and low frequency noise, which significantly reduces the noise of the rotary compressor.

In the present utility model, there is no special limitation on the number of partitions 20, it can be one, as shown in Figure 1, or two, for example, as shown in Figure 2, of course, it can also be three or more Yu three and so on. When the number of partitions 20 increases, the more the number of sub-sound-absorbing spaces 101 separated from the sound-absorbing space 110, the stronger the reflection effect and the better the sound-absorbing effect. Moreover, since the partition plate 20 provided improves the noise reduction effect, the noise reduction cover 10 does not need to be provided with two layers of covers. Compared with the double-layer silencer with double-layer covers in the related art, not only the noise reduction effect is equivalent or even better , and the thickness of the muffler cover 10 can be reduced, and when screw connection is used, the force bearing distance is larger, the connection is stronger, the installation is more convenient, and the cost is lower.

According to the muffler 100 of the embodiment of the utility model, by setting the partition plate 20 with the through hole 201 in the muffler space 110, the muffler 100 can form a multi-layer structure without setting two layers of covers, and the high-pressure gas carrying the sound wave is The flow path in the muffler space 110 can be changed, which effectively eliminates the noise of different frequency bands, and at the same time expands the muffler frequency range, avoiding the natural frequency resonance of the muffler space 110 in the muffler 100, and significantly improving the muffler effect of the muffler 100; at the same time The muffler 100 can be installed on the bearing of the rotary compressor as an integrated structure, which is more convenient to install and more firmly connected.

It should be noted that, in the present invention, the connection part 11 is preferably connected by screws, and the connection is stable. However, the connection part 11 is not limited to being connected to the bearing by threaded fasteners such as screws, and other connection structures can also be used, such as clamping, welding or bonding, etc. At this time, the connection part 11 can be set to a corresponding structure , which is understandable to those skilled in the art and will not be described in detail here.

Optionally, the partitions 20 may include multiple partitions arranged at intervals, and the through holes 201 on two adjacent partitions 20 are arranged staggered in the distribution direction of the partitions 20 . Here, the distribution direction of the baffles 20 is roughly the direction from the inlet 120 to the outlet 130 , and when the baffles 20 are installed on the bearing of the rotary compressor, the distribution direction of the baffles 20 may be the axial direction of the bearing. The through-holes 201 on two adjacent partitions 20 are staggered in the distribution direction of the partitions 20, so that the gas flow path is more tortuous, and it is easier to collide with the partitions 20 or the muffler cover 10 during the flow, and the gas is reflected The more times you use, the more energy is consumed, and the noise reduction effect is further improved.

For example, in the embodiment shown in Fig. 2 to Fig. 5, there are two partitions 20, and the two partitions 20 extend in the horizontal direction and are arranged at intervals in the vertical direction, so that the sound-absorbing space 110 is divided into two sub-deep sound-absorbing spaces, the upper and the lower. In the space 101, the through hole 201 on one partition 20 is on the left side, and the through hole 201 on the other partition 20 is on the right side. As shown in Figure 5, when the high-pressure gas carrying sound waves enters a sub-muffling space 101, part of the energy can be consumed by reflection, and at the same time, after the high-pressure gas carrying sound waves flows to the next sub-muffling space 101, it can be eliminated by using the through hole 201. Low and medium frequency noise, after repeated consumption, can significantly improve the noise reduction effect.

In the present invention, there is no special limitation on the number of through holes 201 on the partition plate 20 , it may be one, or two, three or more than three. For example, in some embodiments of the present invention, each separator 20 is respectively provided with a plurality of through holes 201 , and the plurality of through holes 201 are arranged at intervals. As a result, not only the gas flow rate can be increased, but also the gas flow paths are more and more complex, and the noise reduction effect is further improved.

The shape of the through hole 201 is not particularly limited, and may be a round hole, a polygonal hole, or a special-shaped hole. For example, in a specific example of the present utility model, the through hole 201 is formed as a circular hole with a diameter of d, and the diameter of the outer contour of the separator 20 is D, as shown in FIG. 3 , wherein, 0.05≤d/D≤0.49 . Since the outer contour of the partition 20 is not limited to a circle, here, the diameter D of the outer contour of the partition 20 can be understood as the maximum radial dimension of the outer contour of the partition 20 .

Research shows that when d and D satisfy the above relationship, the muffler 100 is not only easier to manufacture, but also has an excellent noise reduction effect. For example, in some embodiments of the present invention, d/D are respectively 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45 and so on.

More preferably, the partitions 20 include multiple partitions arranged in parallel, and the shortest distance between the through holes 201 on two adjacent partitions 20 in the extending direction of the partitions 20 is L, where 0.51≤L/D≤0.9. Studies have shown that when L and D meet the above ranges, the muffler 100 has an excellent noise reduction effect. For example, in some embodiments of the present invention, L/D is 0.6, 0.65, 0.7, 0.75, 0.8, etc., respectively.

When each partition 20 is provided with a through hole 201, the shortest distance is L which is the distance between the through holes 201 on the two partitions 20 in the extending direction of the partition 20; when each partition 20 When there are multiple through holes 201 , the shortest distance is L, that is, the distance between the through holes 201 close to each other on the two partitions 20 in the extending direction of the partitions 20 .

Optionally, the height of the muffler cover 10 extending in the axial direction of the bearing is A, as shown in FIG. 2 , wherein 5mm≤A≤14mm. Therefore, the size of the muffler 100 is more appropriate, and can adapt to more rotary compressors, and the volume of the muffler space 110 is more appropriate, and the muffler effect is more excellent. For example, in some embodiments of the present invention, A is respectively 7mm, 9mm, 12mm and so on. When the axial direction of the muffler cover 10 is the axial direction of the bearing, the height A is the axial dimension of the muffler cover 10 .

In some embodiments of the present invention, the extending direction of the separator 20 is perpendicular to the axial direction of the bearing. That is to say, the plane where the separator 20 is located is perpendicular to the axial direction of the bearing. As a result, the partition plate 20 has a better reflective effect on the gas, which can further improve the noise reduction effect. Further, the baffles 20 may include multiple ones arranged in parallel, and each baffle 20 is perpendicular to the axial direction of the bearing, so that the noise reduction effect is better.

In this structure, as shown in FIG. 2 , assuming that the distance between two adjacent baffles 20 is B, the distance between the baffle 20 adjacent to the outlet end of the sound-absorbing cover 10 and the end face of the outlet end of the sound-absorbing cover 10 is C , where A, B and C satisfy: when 0.1 ≤ B/A ≤ 2/3, 0.1A ≤ C ≤ 1/3A; when 2/3 ≤ B/A ≤ 0.9, 0.1A ≤ C ≤ 1/ 6A. It is found through research that when A, B and C satisfy the above relational formula, the muffler 100 can have an excellent noise reduction effect. Here, since the noise reduction cover 10 is provided on the bearing, the distance C is the distance between the partition plate 20 adjacent to the bearing and the end surface of the bearing.

In some embodiments of the present utility model, when the muffler 100 is installed on the bearing, the rotating shaft can pass through the inlet 120 and the outlet 130, that is to say, the inlet 120 and the outlet 130 can not only be used as air intake and outlet, Moreover, it can also be used as a mounting hole for mounting a rotating shaft. At the same time, the partition 20 is also provided with a shaft hole 202, the inlet 120, the outlet 130 correspond to the shaft hole 202, and the rotating shaft can be inserted in the inlet 120, the shaft hole 202 and the outlet 130 in turn, and the structure of the muffler 100 is simpler. The gas effect is good and the installation is more convenient.

As shown in Figures 1 and 2, the connecting portion 11 can be formed as a connecting flange arranged on the outer periphery of the inlet end of the muffler cover 10. When the muffler 100 is arranged on the bearing of a rotary compressor, the connecting flange can be connected to the bearing Stop arriving. The connection flange is provided with a plurality of connection holes, and the plurality of connection holes are spaced apart along the circumference of the connection flange, and threaded fasteners are fitted in the connection holes to connect the noise reduction cover 10 and the bearing of the rotary compressor. The connection is firm and Good sealing. Since the muffler cover 10 can be arranged in one layer, compared with the muffler with two layers of covers in the related art, the thickness of the connection flange can be reduced, which improves the connection force of the threaded fasteners and makes the connection stronger.

The through hole 201 may be disposed adjacent to the shaft hole 202 . Therefore, not only the noise reduction effect is good, but also the gas fluidity is better. As shown in FIG. 3 and FIG. 4 , three through holes 201 may be provided on the separator 20, all of which are arranged adjacent to the shaft hole 202, and the three through holes 201 are roughly distributed on a straight line. Therefore, not only is it easier to manufacture, but also the noise reduction effect and gas fluidity are better.

Further, when multiple partitions 20 are provided in the muffler 100 , the through holes 201 on two adjacent partitions 20 may be located on both sides of the shaft hole 202 . That is to say, the through holes 201 on two adjacent partitions 20 differ by about 180 degrees in the circumferential direction of the shaft hole 202 . Therefore, the through-holes 201 on two adjacent partitions 20 are more staggered, and the gas needs to flow around the rotating shaft when flowing, so that the noise reduction effect of the muffler 100 is better.

Optionally, one end of the muffler cover 10 can be completely opened to form the inlet 120, the inlet 120, the outlet 130 and the shaft hole 202 can be arranged coaxially, and the radial dimensions of the inlet 120 and the outlet 130 are respectively larger than the size of the shaft hole 202. As shown in Fig. 3 and Fig. 4, the partition 20 can be formed into a petal-shaped structure, that is to say, the outer periphery of the partition 20 can be formed as a concave-convex structure alternately along the circumferential direction, and the sound-absorbing cover 10 can also be formed to match the partition. The 20 shapes correspond to the petal-shaped structures. Therefore, the shape of the sound-absorbing space 110 is more complicated, and the reflection effect is strengthened, which can further improve the sound-absorbing effect.

A rotary compressor according to an embodiment of the present invention may include a cylinder, a main bearing, a sub bearing, and a muffler 100 . The main bearing and the auxiliary bearing are arranged at the two axial ends of the cylinder, and a cylinder chamber is arranged in the cylinder, and an exhaust hole is arranged on the main bearing, and the exhaust hole communicates with the cylinder chamber. The muffler 100 is provided on the side surface of the main bearing facing away from the cylinder, and the exhaust hole communicates with the muffler space 110 through the inlet 120 .

When the rotary compressor is running, high-pressure gas carrying sound waves flows out of the cylinder cavity, enters the muffler space 110 through the exhaust hole, and the gas flows out of the outlet 130 after passing through multiple sub- muffler spaces 101 in sequence. During the flow of the gas, the sound energy is gradually consumed under the action of the partition plate 20 and the muffler cover 10, which significantly reduces the exhaust noise of the rotary compressor.

The rotary compressor according to the embodiment of the utility model can be a vertical compressor or a horizontal compressor. When the rotary compressor is a vertical compressor, the main bearing and the auxiliary bearing are arranged up and down, and the main bearing is on the upper , the auxiliary bearing is at the bottom, the muffler 100 can be arranged on the upper surface of the main bearing, and the partition 20 can extend along the horizontal direction; when the rotary compressor is a horizontal compressor, the main bearing and the auxiliary bearing are respectively distributed along the left and right directions, The muffler 100 may be disposed on a side surface of the main bearing, and the partition plate 20 may extend in a vertical direction.

Other configurations and operations of the rotary compressor according to the embodiment of the present utility model are known to those skilled in the art and will not be described in detail here.

In describing the present invention, it should be understood that the terms "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are for convenience only The present invention is described and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components , unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the description of this specification, the description referring to the term "embodiment" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or embodiment of the present invention. example. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Claims (10)

1. A kind of 1. muffler, it is characterised in that including：

   Silencer cover, silence space is defined in the silencer cover, the both ends of the silencer cover are respectively equipped with and the silence space The inlet and outlet of connection, the entrance point of the silencer cover are provided with the connecting portion for being used for being connected with the bearing of rotary compressor；

   At least one dividing plate, at least one dividing plate are located in the silence space and positioned at the import and the outlets Between so that the silence space is divided into more sub- silence spaces, each dividing plate is connected with the silencer cover and is communicated with it The through hole of the sub- silence space of both sides.
2. 2. muffler according to claim 1, it is characterised in that the dividing plate includes being spaced apart the multiple of setting, adjacent The through hole on the two dividing plates stagger setting on the distribution arrangement of the dividing plate.
3. 3. muffler according to claim 1, it is characterised in that be respectively equipped with each dividing plate multiple described logical Hole, multiple through holes, which are spaced apart, to be set.
4. 4. muffler according to claim 1, it is characterised in that axially extending height of the silencer cover along the bearing Spend for A, wherein, 5mm≤A≤14mm.
5. 5. muffler according to claim 4, it is characterised in that the dividing plate include with the axially vertical of the bearing and What is be arranged in parallel is multiple, and the distance between two neighboring described dividing plate is B, the dividing plate and the entrance point of the neighbouring entrance point The distance between end face be C, described A, B and C meet：

   As 0.1≤B/A ＜ 2/3,0.1A≤C≤1/3A；As 2/3≤B/A≤0.9,0.1A≤C≤1/6A.
6. 6. muffler according to claim 1, it is characterised in that the through hole is formed as a diameter of d circular hole, it is described every A diameter of D of the outline of plate, wherein：0.05≤d/D≤0.49.
7. 7. muffler according to claim 6, it is characterised in that the dividing plate is multiple including be arrangeding in parallel, and adjacent two Beeline of the through hole on the bearing of trend of the dividing plate on the individual dividing plate is L, wherein, 0.51≤L/D≤0.9.
8. 8. according to the muffler any one of claim 1-7, it is characterised in that the import and the outlet are suitable to wear If rotating shaft, the connecting portion is formed as being located at the connection flange on the periphery edge of the entrance point, and the connection flange is provided with edge Its circumferentially-spaced multiple connecting hole opened, the dividing plate are provided with the axis hole for being used for wearing the rotating shaft, and the through hole is adjacent to institute State axis hole setting.
9. 9. muffler according to claim 8, it is characterised in that the through hole on the two neighboring dividing plate is located at institute respectively State the both sides of axis hole.
10. A kind of 10. rotary compressor, it is characterised in that including：

    Cylinder, the cylinder is interior to be provided with cylinder chamber；

    Base bearing and supplementary bearing, the base bearing and the supplementary bearing are located at the axial both ends of the cylinder, on the base bearing Provided with the steam vent connected with the cylinder chamber；

    According to the muffler any one of claim 1-9, the muffler is located at the gas backwards of the base bearing On one side surface of cylinder and the steam vent and the inlet communication.