CN115247636A

CN115247636A - Muffler and compressor

Info

Publication number: CN115247636A
Application number: CN202110469436.5A
Authority: CN
Inventors: 单树军; 王海军; 褚伟彦
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-10-28

Abstract

The invention relates to the technical field of compressor noise reduction, and provides a silencer and a compressor. The muffler is for a compressor, the muffler comprising: the cavity type assembly is connected with a cylinder cover of the compressor, and at least one first silencing chamber is formed between the cavity type assembly and the cylinder cover; and the plate type component is connected with the cavity type component, at least one second silencing chamber is formed among the plate type component, the cavity type component and the cylinder wall of the compressor, and all the silencing chambers are communicated. According to the invention, the refrigerant gas discharged by the cylinder is primarily silenced through the first silencing chamber formed between the cavity component and the cylinder cover; through the second amortization room that forms between the section of thick bamboo wall of board type subassembly and chamber type subassembly and compressor, further amortization is carried out to the refrigerant gas that gets into the compressor barrel to reduce the air current pulsation noise in the compressor barrel, and promote the space utilization of muffler, promote the noise reduction effect.

Description

Muffler and compressor

Technical Field

The invention relates to the technical field of noise reduction of compressors, in particular to a silencer and a compressor.

Background

Compressors typically use a muffler to reduce the flow noise of the exhaust gas. The silencing process of the silencer is as follows: the valve plate on the cylinder cover of the compressor is periodically opened, so that refrigerant gas is discharged and flows into the cavity of the silencer to realize silencing.

Existing mufflers include single layer mufflers and double layer mufflers. For the double-layer silencer, after refrigerant gas flows out of the cavity of the inner-layer silencer, the refrigerant gas can enter the cavity between the inner-layer silencer and the outer-layer silencer again, and secondary silencing is achieved. Therefore, the double-layer silencer has better silencing effect compared with a single-layer silencer.

However, in the case of the conventional single-layer silencer or double-layer silencer, after refrigerant gas flows into a cylinder of the compressor, noise is still generated due to large air flow pulsation; in addition, the volume of the cavity of the existing silencer is limited, and the space utilization rate is poor.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the invention and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

In view of this, the invention provides a silencer and a compressor, which can reduce airflow pulsation noise in a cylinder of the compressor, improve the space utilization rate of the silencer, and improve the noise reduction effect.

One aspect of the present invention provides a muffler for a compressor, the muffler comprising: the cavity type assembly is connected with a cylinder cover of the compressor, and at least one first silencing chamber is formed between the cavity type assembly and the cylinder cover; and the plate type component is connected with the cavity type component, at least one second silencing chamber is formed among the plate type component, the cavity type component and the cylinder wall of the compressor, and all the silencing chambers are communicated.

In some embodiments, a reciprocating tortuous exhaust path is formed between the muffling chambers.

In some embodiments, the plate type assembly includes one or more layers of spaced baffles formed in a flat plate configuration or a stepped configuration; an exhaust channel is arranged between the baffle and the cylinder wall of the compressor, or an exhaust through hole is arranged on the baffle.

In some embodiments, when the plate type member includes a plurality of layers of spaced baffles, the innermost baffle forms the second muffling chamber with the cavity type member and the cylinder wall of the compressor, and the second muffling chamber is formed between each two layers of baffles and the cylinder wall of the compressor.

In some embodiments, the baffle is provided with a partition board, and the partition board divides the second silencing chamber formed by the corresponding baffle into a plurality of communicated silencing chambers.

In some embodiments, the baffle is provided with ribs extending in an axial and/or radial direction.

In some embodiments, the cavity assembly comprises one or more layers of spaced covers, and the end surfaces or the side surfaces of the covers are provided with vent holes; when the cavity type assembly comprises a plurality of layers of cover bodies which are spaced, the first silencing chamber is formed between the innermost layer of cover body and the cylinder cover, and the first silencing chamber is formed between every two layers of cover bodies.

In some embodiments, the cavity assembly and the plate assembly are each provided with an axial bore; the shaft holes of the cavity component and the plate component are respectively provided with a positioning bulge and a positioning hole which are matched with each other, and the cavity component and the plate component are connected in a positioning way through the positioning bulge and the positioning hole.

In some embodiments, the cavity member and the plate member are both stamped from a metal material, and the plate member is welded to the cavity member; or at least one of the cavity component and the plate-type component is made of non-metal materials in an injection molding mode, and the plate-type component is buckled on the cavity component.

Another aspect of the present invention provides a compressor having a muffler as described in any of the above embodiments.

Compared with the prior art, the invention has the beneficial effects that:

the refrigerant gas exhausted by the cylinder is primarily silenced through a first silencing chamber formed between the cavity component and the cylinder cover; through the second anechoic chamber formed between the plate type component and the cavity type component and between the cylinder walls of the compressor, the refrigerant gas entering the cylinder body of the compressor is further silenced, so that the airflow pulsation noise in the cylinder body of the compressor is reduced, the space utilization rate of the silencer is improved, and the noise reduction effect is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view showing a structure in which a muffler is assembled to a compressor in an embodiment of the present invention;

FIG. 2 is a schematic view showing the structure of a plate type member of a silencer in the embodiment of the present invention;

FIG. 3 shows a schematic exhaust path of a muffler in an embodiment of the present invention;

FIG. 4 shows another exhaust path schematic of a muffler in an embodiment of the present invention;

fig. 5 is a schematic diagram showing the comparison of the noise reduction effect of the silencer according to the embodiment of the present invention with that of the existing single-layer silencer and double-layer silencer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

The drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. The use of "first," "second," and similar terms in the detailed description is not intended to imply any order, quantity, or importance, but rather is used to distinguish one element from another. It should be noted that features of the embodiments of the invention and of the different embodiments may be combined with each other without conflict.

Fig. 1 shows a structure in which a muffler is assembled to a compressor in an embodiment, and referring to fig. 1, a muffler for a compressor in the present embodiment includes: the cavity type component 1 is connected with a cylinder cover 3 of the compressor, and at least one first silencing chamber 10 is formed between the cavity type component 1 and the cylinder cover 3; and a plate-type assembly 2 connected with the cavity-type assembly 1, wherein at least one second silencing chamber 20 is formed between the plate-type assembly 2 and the cavity-type assembly 1 and a cylinder wall (not specifically shown in the figure) of the compressor, and the silencing chambers are communicated with each other.

The silencing process of the silencer of the embodiment comprises the following steps: in the running process of the compressor, refrigerant gas discharged from the cylinder 4 enters the first silencing chamber 10 formed by the cavity component 1 and the cylinder cover 3 through the exhaust valve plate 31 of the cylinder cover 3, so as to realize primary silencing; after being discharged from the first silencing chamber 10, the refrigerant gas enters a second silencing chamber 20 formed by the plate type component 2, the cavity type component 1 and the barrel wall of the compressor to realize further silencing; through the combination of the first silencing chamber 10 and the second silencing chamber 20, especially the action of the second silencing chamber 20, the airflow pulsation noise in the cylinder body of the compressor can be obviously reduced, the space utilization rate of the silencer is greatly improved, and the integral noise reduction effect of the compressor is improved.

The volumes of the first muffling chamber 10 and the second muffling chamber 20 can be designed as needed.

For example, in one embodiment, the volume of the second muffling chamber 20 is greater than the volume of the first muffling chamber 10. The cavity type component 1 is limited by the assembly requirement between the cavity type component and the cylinder cover 3 and cannot be expanded in the radial direction; the plate type component 2 is matched with the cylinder of the compressor, so that radial large expansion is realized, and the space between the cavity type component 1 and the cylinder of the compressor is effectively utilized. The silencing effect can be greatly improved by the second silencing chamber 20 with large volume. Volume V of the second muffling chamber 20 ₂ Volume V of the first muffling chamber 10 ₁ The relationship between the two specifically satisfies: v ₂ /V ₁ > 1, e.g. V ₂ /V ₁ ＝1.2，V ₂ /V ₁ ＝1.5，V ₂ /V ₁ =2, and so on. When the first muffling chamber 10/the second muffling chamber 20 include a plurality of ones, the volume relationship between the first muffling chamber 10/the second muffling chamber 20 is, in particular, such that the volume of the innermost second muffling chamber 20 is larger than the volume of the innermost first muffling chamber 10.

As another example, in some flat cylinder structure compressors, the volume of the second muffling chamber 20 may be smaller than the volume of the first muffling chamber 10. Of course, the volumes of the first muffling chamber 10 and the second muffling chamber 20 may be equal, and the present invention is not limited thereto.

In one embodiment, a reciprocating exhaust path is formed between the muffling chambers. For example, the exhaust hole of the first muffling chamber 10 is opened at the position close to the cylinder cover 3 on the side surface of the cavity type component 1, so that the refrigerant gas flushed from the exhaust valve plate 31 enters the first muffling chamber 10 and is exhausted from the exhaust hole of the first muffling chamber 10 after being bent for the first time; the exhaust through hole of the second silencing chamber 20 is arranged at the position, close to the compressor crankshaft, of the plate type assembly 2, so that the refrigerant gas is required to be bent for the second time and then exhausted from the exhaust through hole of the second silencing chamber 20, the air flow pulsation of the refrigerant gas is greatly weakened through the reciprocating bent exhaust path between the silencing chambers, and the silencing effect is enhanced. Of course, the exhaust path formed between the muffling chambers can be bent back and forth in other ways, which will be described in detail below with reference to fig. 3 and 4.

The cavity module 1 and the plate module 2 will be described separately below.

Referring to fig. 1, the cavity module 1 may include one or more layers of spaced covers 11 (fig. 1 shows two layers of covers 11, but not limited thereto), and the end surfaces or side surfaces of the covers 11 are provided with vent holes 12. One or more exhaust holes 12 can be arranged on each cover body 11 according to the requirement of the actual noise elimination frequency band, and the shape of each exhaust hole 12 can be any suitable shape such as a circle, an ellipse, a quincunx and the like. When the cavity module 1 includes a plurality of spaced cover bodies 11, a first muffling chamber 10 is formed between the innermost cover body 11 and the cylinder head 3, and a first muffling chamber 10' is formed between every two cover bodies 11. Through the setting of multilayer lid 11, realize utilizing chamber type subassembly 1 to carry out the amortization many times to refrigerant gas, promote noise cancelling effect.

Fig. 2 illustrates the structure of the plate-type assembly 2, and as shown in fig. 1 and 2, the plate-type assembly 2 may include one or more layers of spaced baffles 21 (fig. 1 and 2 illustrate one layer of baffles 21, but not limited thereto), and the baffles 21 may be formed in a flat plate structure or a stepped structure. When the baffle 21 is of a flat plate structure, the baffle is fixed with the end face of the cavity component 1, and a second silencing chamber 20 is formed between the baffle and the side face of the cavity component 1 and the cylinder wall of the compressor; when the baffle 21 has a stepped structure, it is fixed to a part of the end surface of the cavity module 1 only by the innermost step, and forms the second sound-deadening chamber 20 with the remaining end surface and side surface of the cavity module 1 and the cylinder wall of the compressor, so that the volume of the second sound-deadening chamber 20 can be increased.

Like the multi-layer cover 11, when the plate-type assembly 2 includes a plurality of layers of spaced baffles 21, a second muffling chamber 20 is formed between the innermost baffle 21 and the wall of the cavity-type assembly 1 and the wall of the compressor, and a second muffling chamber is formed between each two layers of baffles 21 and the wall of the compressor. Through the setting of multilayer baffle 21, realize utilizing plate type subassembly 2 to carry out the amortization many times to refrigerant gas, promote noise cancelling effect.

An exhaust passage is arranged between the baffle plate 21 and the cylinder wall of the compressor, and particularly, the exhaust passage is formed by a gap between the outer diameter of the baffle plate 21 and the cylinder wall of the compressor; or, the baffle 21 may be provided with the exhaust through holes 22, and the number, shape and distribution of the exhaust through holes 22 may be set as required. For example, the baffle plate 21 is provided with a plurality of circular exhaust through holes 22, and the plurality of exhaust through holes 22 are uniformly distributed.

In one embodiment, the baffle 21 may further include a partition plate (not specifically shown in the drawings) that divides the second sound-deadening chamber 20 formed by the corresponding baffle 21 into a plurality of connected sound-deadening chambers. For example, the partition plate is vertically fixed between the baffle plate 21 and the cavity module 1/cylinder cover 3, or vertically fixed between two layers of baffle plates 21, so that the silencing effect is enhanced by the plurality of separated silencing bins, and the assembly stability between the baffle plate 21 and the cavity module 1/cylinder cover 3, or between two layers of baffle plates 21 can be enhanced.

In one embodiment, the baffle 21 may further include ribs extending axially and/or radially to enhance the rigidity of the baffle 21.

In one embodiment, the surface of the cover 11 for forming the first sound-deadening chamber 10 and the surface of the baffle plate 21 for forming the second sound-deadening chamber 20 may be provided with some wrinkles, porous material, or the like, to enhance the sound-deadening effect.

The cavity type component 1 and the plate type component 2 are both provided with shaft holes (refer to the shaft hole 23 of the plate type component 2 shown in figure 2) for being sleeved on a compressor crankshaft; the shaft holes of the cavity component 1 and the plate component 2 are respectively provided with a positioning protrusion and a positioning hole (for example, the shaft hole 23 of the plate component 2 is provided with a positioning hole 230) which are matched with each other, so that the plate component 2 can be assembled to the cavity component 1, and the cavity component 1 and the plate component 2 can be connected in a positioning manner through the positioning protrusion and the positioning hole. In other embodiments, a positioning hole may be disposed at the shaft hole of the cavity component 1, and a positioning protrusion may be disposed at the shaft hole of the plate component 2, as long as positioning assembly between the cavity component 1 and the plate component 2 is achieved.

Both the cavity module 1 and the plate-type module 2 may be stamped from a metallic material, and the plate-type module 2 may be welded to the cavity module 1. Or at least one of the cavity component 1 and the plate-type component 2 is made of non-metal materials in an injection molding mode, and the plate-type component 2 can be buckled on the cavity component 1; specifically, the cavity type component 1 and the plate type component 2 can be both made of non-metal materials by injection molding, or one of the cavity type component 1 and the plate type component 2 is made of non-metal materials by injection molding and the other is made of metal materials by stamping, and the design can be specifically carried out according to the requirement.

Based on the above-described exhaust manner of the cavity module 1 and the plate module 2, two exhaust paths are shown in fig. 3 and 4. Referring to fig. 1 and 3, in the present embodiment, the cavity module 1 has at least two layers of cover bodies 11, wherein the exhaust hole 12a of the inner layer cover body 11 is disposed corresponding to the exhaust valve plate 31, and the exhaust hole 12b of the outer layer cover body 11 is disposed at a position close to the cylinder head 3 on the side surface; the plate-type assembly 2 is provided with at least one layer of baffle 21, and the exhaust through hole 22 of the baffle 21 is arranged on the side surface close to the outer layer cover body 11 and can be close to the position of the crankshaft of the compressor. The exhaust path between the muffling chambers is shown by the broken line bent arrow in fig. 3, and the refrigerant gas is repeatedly bent in the muffler after being discharged from the cylinder 4, thereby greatly enhancing the muffling effect.

Referring to fig. 1, 3 and 4, in this embodiment, on the basis of fig. 3, three layers of baffles are disposed in the plate-type assembly 2 (fig. 4 does not specifically show the complete structure of the three layers of baffles), wherein the exhaust through hole 22a of the innermost baffle is disposed at a position close to the side surface of the outer-layer cover 11, an exhaust channel 22b is formed between the middle-layer baffle and the cylinder wall of the compressor, and the exhaust through hole 22c of the outermost baffle is disposed at a position close to the crankshaft of the compressor. The exhaust path between the silencing chambers is shown by the broken line bending arrow in fig. 4, and after the refrigerant gas is exhausted from the cylinder 4, the refrigerant gas is bent back and forth for multiple times in the silencer, so that the silencing effect is greatly enhanced.

In other embodiments, other designs of the exhaust mode of the muffler can be made based on the basic concept of the exhaust path reciprocating bending, and are within the protection scope of the present invention.

In the drawings of the above embodiments, the cylinder head 3 engaged with the muffler is exemplified as the above cylinder head; however, the present invention is not limited thereto, and the silencer of each of the above embodiments may be provided on the upper cylinder head and/or the lower cylinder head of the compressor according to actual needs.

Fig. 5 shows a comparison of the noise reduction effect of the silencer according to the present invention with that of the conventional single-layer silencer and double-layer silencer, and as shown in fig. 5, the horizontal axis represents the pulsation frequency f of the air flow in Hz, and the vertical axis represents the silencing volume TL in dB. Curve 510 is the variation of the muffling volume of the present invention with the pulsation frequency of the air flow, curve 520 is the variation of the muffling volume of the existing single-layer muffler with the pulsation frequency of the air flow, and curve 530 is the variation of the muffling volume of the existing double-layer muffler with the pulsation frequency of the air flow.

The present invention also provides a compressor having the muffler described in any of the above embodiments. The silencer is particularly suitable for the rotor compressor, can obviously reduce the noise of the rotor compressor and inhibit the internal transmission sound of an air conditioning system where the rotor compressor is located.

In conclusion, the silencer and the compressor can preliminarily silence the refrigerant gas exhausted by the cylinder through the first silencing chamber formed between the cavity assembly and the cylinder cover; through the second amortization room that forms between the section of thick bamboo wall of board type subassembly and chamber type subassembly and compressor, further amortization is carried out to the refrigerant gas that gets into the compressor barrel to show the air current pulsation noise that reduces the compressor barrel, and greatly promote the space utilization of muffler, promote the whole noise reduction effect of compressor.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A muffler for a compressor, the muffler comprising:

the cavity type component is connected with a cylinder cover of the compressor, and at least one first silencing chamber is formed between the cavity type component and the cylinder cover;

and the plate type component is connected with the cavity type component, at least one second silencing chamber is formed among the plate type component, the cavity type component and the cylinder wall of the compressor, and all the silencing chambers are communicated.

2. The muffler of claim 1, wherein the muffling chambers form a reciprocating exhaust path therebetween.

3. The muffler of claim 1, wherein the plate assembly includes one or more layers of spaced baffles formed in a flat plate configuration or a stepped configuration;

an exhaust channel is arranged between the baffle and the cylinder wall of the compressor, or an exhaust through hole is arranged on the baffle.

4. The muffler of claim 3, wherein when the plate assembly includes a plurality of spaced layers of baffles, the innermost baffle forms the second muffling chamber with the cavity assembly and the wall of the compressor, and each two baffles forms the second muffling chamber with the wall of the compressor.

5. The muffler of claim 3, wherein the baffle is provided with a partition plate that divides a second muffling chamber formed by the corresponding baffle into a plurality of communicating muffling chambers.

6. A silencer according to claim 3 wherein said baffle is provided with ribs extending axially and/or radially.

7. The muffler of claim 1, wherein the cavity module comprises one or more layers of spaced cover bodies, the cover bodies having exhaust holes on their ends or sides;

when the cavity type assembly comprises a plurality of layers of cover bodies which are spaced, the first silencing chamber is formed between the cover body at the innermost layer and the cylinder cover, and the first silencing chamber is formed between every two layers of cover bodies.

8. The muffler of claim 1, wherein the cavity assembly and the plate assembly each have an axial bore;

the shaft holes of the cavity component and the plate component are respectively provided with a positioning protrusion and a positioning hole which are matched with each other, and the cavity component and the plate component are connected in a positioning manner through the positioning protrusion and the positioning hole.

9. The muffler of claim 1, wherein the cavity block and the plate-type block are each stamped from a metallic material, the plate-type block being welded to the cavity block; or

At least one of the cavity assembly and the plate-type assembly is injection molded from a non-metallic material, and the plate-type assembly is snapped onto the cavity assembly.

10. A compressor, characterized in that the compressor has a muffler according to any one of claims 1-9.