WO2017045406A1

WO2017045406A1 - Silencer and air conditioner

Info

Publication number: WO2017045406A1
Application number: PCT/CN2016/081298
Authority: WO
Inventors: 颜家桃; 卓明胜; 王晨光; 廖东升; 谢镇洲; 刘婷; 蔺维君; 何国栋
Original assignee: 珠海格力电器股份有限公司
Priority date: 2015-09-17
Filing date: 2016-05-06
Publication date: 2017-03-23
Also published as: CN105091298A

Abstract

A silencer comprises a silencing structure. The silencing structure comprises a sound absorption supporting body (12); a sound absorption outer layer (11) coated on the outer periphery of the sound absorption supporting body (12); and a sound absorption inner core layer (13) clamped in the sound absorption supporting body (12). Also provided is an air conditioner having an air duct (100) and a silencer disposed in the air duct (100). The present invention can effectively resolve the problem that the resistance of a silencer in the prior art is quite high.

Description

Muffler and air conditioner

Technical field

The present invention relates to the field of noise reduction technology, and in particular to a muffler and an air conditioner.

Background technique

At present, the chip muffler used on the combination cabinet is a combination of a side opening metal plate and a glass wool combination. The combination of the perforated metal sheet and the attracting material results in poor flow field performance and high resistance.

Summary of the invention

The main object of the present invention is to provide a muffler and an air conditioner to solve the problem of large resistance of the muffler in the prior art.

In order to achieve the above object, according to an aspect of the invention, a muffler is provided, comprising: a muffling structure comprising: an acoustic absorption support; and an acoustic outer layer wrapped around a circumferential outer side of the sound absorption support; The sound absorbing inner core layer is sandwiched inside the sound absorbing support.

Further, the muffler further includes a fixed net that is at least partially wrapped around the circumferential outer side of the sound absorbing outer layer.

Further, the sound absorbing structure is fixed by a fastener, and the fastener passes through the sound absorbing outer layer, the sound absorbing support body, and the sound absorbing inner core layer.

Further, the muffler further includes an air inlet side baffle assembly disposed at an air inlet end of the muffling structure, and the air inlet side baffle assembly extends outwardly in a direction away from the muffling structure.

Further, the air inlet side baffle assembly includes two baffles, and the first ends of the two baffles are connected to the muffling structure, and the second ends of the two baffles are connected to each other and form an angle.

Further, the baffle is planar or curved.

Further, the muffler further includes a reinforcing assembly that is coupled to the inlet side baffle assembly.

Further, the reinforcing assembly includes two reinforcing plates disposed opposite each other, the sound absorbing structure being sandwiched between the two reinforcing plates, and the fastener passing through the reinforcing plate.

Further, the sound absorbing outer layer and the sound absorbing inner core layer are made of a lightweight polyurethane foam, and the sound absorbing support is made of a hard or semi-rigid polyurethane foam.

Further, at least one of the sound absorbing outer layer, the sound absorbing inner core layer, and the sound absorbing support body has a multilayer structure.

Further, the muffler further includes a bottom plate, and the fixed net is fixed on the bottom plate.

Further, a through hole is provided in the sound absorbing support.

According to another aspect of the present invention, an air conditioner having a duct and a muffler disposed in the duct is provided, and the muffler is the muffler described above.

Further, the muffler is a plurality of which are sequentially disposed.

By applying the technical solution of the invention, the muffler is fixed in the air duct during use, and after the sound wave enters the muffler, the sound waves cancel each other to achieve the purpose of sound elimination due to the reflection and interference of the sound-absorbing structure on the sound wave. The sound absorbing outer layer of the muffler is disposed on the outer side of the sound absorbing support body, and the sound waves that enter the sound absorbing support body and the sound absorbing inner core layer from the outside are all silenced by the sound absorbing outer layer. Because the sound absorbing support itself also has a structure for anechoic, it plays a supporting role and also plays a role of anechoic. The technical solution of the invention achieves good flow field performance and reduces resistance by reasonable hierarchical structure setting. In addition, different structures have different sound absorption effects for different wavelengths, and the layered structure absorbs a wide range of sound waves, and the technical solution of the present invention provides a better sound absorption effect.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

Figure 1 shows a schematic structural view of an embodiment of a muffler according to the present invention;

Figure 2 is a cross-sectional view showing the A-A direction of the muffler of Figure 1;

Figure 3 is a front elevational view showing the air inlet baffle assembly and the reinforcement assembly of the muffler of Figure 1;

Figure 4 is a top plan view showing the air inlet baffle assembly and the reinforcement assembly of the muffler of Figure 1;

Figure 5 is a top plan view showing the fixed net of the muffler of Figure 1;

Figure 6 is a side elevational view showing the fixed net of the muffler of Figure 1;

Figure 7 is a top plan view showing the sound absorbing support of the muffler of Figure 1;

Fig. 8 is a side elevational view showing the sound absorbing support of the muffler of Fig. 1.

Wherein, the above figures include the following reference numerals:

11. Sound absorbing outer layer; 12, sound absorbing support body; 121, fastener fixing hole; 13, sound absorbing inner core layer; 20, fixed net; 30, baffle; 31, reinforcing plate; 40, bottom plate; , fasteners; 100, air duct.

detailed description

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

As shown in FIGS. 1 and 2, the muffler of this embodiment includes: a muffling structure. The sound absorbing structure includes an sound absorbing support body 12, a sound absorbing outer layer 11, and a sound absorbing inner core layer 13. The sound absorbing outer layer 11 is wrapped around the circumferential side of the sound absorbing support 12. The sound absorbing inner core layer 13 is interposed in the interior of the sound absorbing support body 12.

Applying the technical solution of the embodiment, the muffler is fixed in the air duct 100, and after the sound wave enters the muffler, the sound waves cancel each other to achieve the purpose of sound elimination due to the reflection and interference of the sound absorbing structure on the sound wave. The muffler is provided with a sound absorbing outer layer 11, and the sound absorbing outer layer 11 is disposed on the outer side of the sound absorbing support body 12, and the sound waves that enter the sound absorbing support body 12 and the sound absorbing inner core layer 13 from the outside are all in the sound absorbing outer layer 11 The sound is silenced by the action. Since the sound absorbing support body 12 itself has a structure for eliminating sound, it plays a supporting role and also plays a role of sound absorbing. This embodiment achieves a good flow field performance and a reduced resistance by a reasonable hierarchical structure setting. In addition, different structures have different sound absorption effects for different wavelengths, and the layered structure absorbs sound waves in a wide range of wavelengths, and the technical solution of the embodiment has a better sound absorption effect.

Preferably, the sound absorbing support body 12 is provided with a through hole. The above structure makes the sound absorbing effect better.

The muffler further includes a fixed net 20 that is at least partially wrapped around the circumferential outer side of the sound absorbing outer layer 11. As shown in FIG. 1 , FIG. 5 and FIG. 6 , in the technical solution in the embodiment, the fixed net 20 completely wraps the muffling structure, and the fixed net 20 is configured as a mesh structure to ensure the smoothness of the sound wave, and is still very The sound absorbing material is well protected so that the sound absorbing material is not torn due to excessive wind speed in the air duct 100. Preferably, the fixed net 20 is made of a stainless steel wire mesh having a mesh number of 10 to 40. It should be noted that the long side in FIG. 6 is matched with the bottom plate 40 at the time of installation.

Of course, as known to those skilled in the art, if the wind speed in the air duct 100 is relatively small, the fixed net may not be provided. In addition, the fixed net 20 does not have to completely wrap the muffling structure. When the muffling structure is fixed in the air duct 100 through the bottom plate or the like, the portion between the muffling structure and the bottom plate may not be provided with a fixed net.

As shown in FIG. 1, in the technical solution of the embodiment, the sound absorbing structure is fixed by the fastener 50, and the fastener 50 passes through the sound absorbing outer layer 11, the sound absorbing support body 12, and the sound absorbing inner core layer 13. The fastener 50 allows the layers of the muffling structure to be combined into a unitary layered structure for better sound absorption. Preferably, the fasteners 50 are evenly arranged such that the layered structure is evenly stressed and the sound absorbing effect is more stable. Further preferably, the fastener 50 is a bolt, nut structure.

As shown in FIG. 3 and FIG. 4, in the technical solution of the embodiment, the muffler further includes an air inlet side baffle assembly disposed at the air inlet end of the muffling structure, and the air inlet side baffle assembly is away from the muffling structure. The direction gradually contracts outwardly. The above structure facilitates flow field splitting and fixing the entire sound absorbing structure.

As shown in FIG. 3 and FIG. 4, in the technical solution of the embodiment, the air inlet side baffle assembly includes two baffles 30, and the first ends of the two baffles 30 are connected to the muffling structure, two blocks. The second ends of the plates 30 are interconnected and form an angle a. Preferably, in order to provide the baffle with a rust preventive function, the baffle of the present embodiment is composed of a rounded galvanized metal plate. Further preferably, in order to make the angle of the baffle more favorable for splitting, in the present embodiment, the angles α of the two baffles are in the range of 15° to 60°.

As shown in FIG. 3, in the technical solution of the embodiment, the baffle 30 has a planar shape or a curved surface. This structure is simple to manufacture while achieving flow field splitting.

As shown in FIG. 3 and FIG. 4, the muffler further includes a reinforcing component, and the reinforcing component is connected to the air inlet side baffle assembly. The reinforcing component includes two reinforcing plates 31 disposed opposite to each other, and the muffling structure is sandwiched between the two reinforcing plates 31. The fastener 50 passes through the reinforcing plate 31. The arrangement of the reinforcing plates 31 extends the life cycle of the entire muffling structure. Preferably, in the present embodiment, the baffle 30 and the reinforcing plate 31 are coupled together.

In the technical solution of the embodiment, the sound absorbing outer layer 11 and the sound absorbing inner core layer 13 are made of a lightweight polyurethane foam, and the sound absorbing support body 12 is made of a semi-rigid polyurethane foam. Polyurethane foam is non-toxic and harmless, and it is an ideal sound absorbing material. Lightweight polyurethane foam is mainly open-celled and has excellent sound absorption properties, but its mechanical properties and sound insulation performance are poor. Semi-rigid polyurethane foam is a semi-open, semi-closed hole structure with certain sound absorption and sound insulation properties. The rigid polyurethane foam is mainly closed cells and has excellent sound insulation and heat insulation properties. Lightweight polyurethane foam is the main sound absorbing material. It is a full-opening structure. The more layers of lightweight polyurethane foam, the better the sound-absorbing effect, but the thickness and strength of the entire muffler need to be considered. As shown in FIGS. 7 and 8, the semi-rigid polyurethane foam is the main support material, and the semi-rigid polyurethane foam is provided with fastener fixing holes 121. Preferably, the semi-rigid polyurethane foam additionally has a through hole: the pore diameter ranges from Φ2 to Φ5, and the semi-rigid polyurethane foam has a sound absorbing effect of 20% to 50%. The sound absorbing support 12 envelops the sound absorbing inner core layer 13 to ensure the strength of the entire lightweight polyurethane foam.

Of course, as known to those skilled in the art, the sound absorbing support 12 can also be a rigid polyurethane foam.

As shown in Fig. 1, in the technical solution of the present embodiment, the sound absorbing outer layer 11, the sound absorbing inner core layer 13, and the sound absorbing support body 12 are both of a multilayer structure. The multi-layer structure further ensures the noise reduction effect. Of course, as known to those skilled in the art, any one of the sound absorbing outer layer 11, the sound absorbing inner core layer 13, and the sound absorbing support 12 may have a multilayer structure, or any two of the above may be a multilayer structure.

As shown in FIG. 1 , in the technical solution of the embodiment, the muffler further includes a bottom plate 40 , and the fixed net 20 is fixed on the bottom plate 40 . Preferably, in the present embodiment, the baffle 30 is spot welded to the bottom plate 40 of the muffler. The above structure ensures that the muffler can be inspected without repairing the body of the air duct 100 during maintenance.

The present application also provides an air conditioner according to which an embodiment (not shown) of the air conditioner of the present application includes the above muffler. Since the above-mentioned muffler provided with a layered structure has excellent flow field performance, reduced resistance, wide sound absorption range, and the like, the air conditioner having the above muffler also has the above advantages.

In the technical solution of the embodiment, the muffler is a plurality of sets in sequence. The muffler is set to be plural depending on the size of the air passage space and the thickness of the muffler. Preferably, there is a space between adjacent two muffler, and the above structure has a better sound absorbing effect, and the interval arrangement is favorable for the flow field distribution in the air duct. Of course, those skilled in the art know that adjacent two mufflers can also be arranged without gaps.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A muffler, comprising: a muffling structure, the muffling structure comprising:

Sound absorbing support (12);

a sound absorbing outer layer (11) wrapped around the circumferential side of the sound absorbing support body (12);

The sound absorbing inner core layer (13) is interposed in the interior of the sound absorbing support body (12).
The muffler according to claim 1, characterized in that the muffler further comprises a fixed net (20) at least partially wrapped around the circumferential outer side of the sound absorbing outer layer (11).
The muffler according to claim 1 or 2, wherein the muffling structure is fixed by a fastener (50) passing through the sound absorbing outer layer (11), The sound absorbing support (12) and the sound absorbing inner core layer (13) are described.
The muffler according to claim 3, wherein the muffler further comprises an air inlet side baffle assembly disposed at an air inlet end of the muffling structure, the air inlet side baffle assembly being remote from the The direction of the acoustic structure gradually contracts outwardly.
The muffler according to claim 4, wherein the inlet side baffle assembly comprises two baffles (30), and the first ends of the two baffles (30) are connected to the muffling structure The second ends of the two baffles (30) are connected to each other and form an angle.
The muffler according to claim 5, characterized in that the baffle (30) is planar or curved.
The muffler of claim 4 wherein said muffler further comprises a reinforcement assembly coupled to said inlet side baffle assembly.
The muffler according to claim 7, wherein the reinforcing member comprises two reinforcing plates (31) disposed opposite to each other, and the muffling structure is interposed between the two reinforcing plates (31). The fastener (50) passes through the reinforcing plate (31).
The muffler according to claim 1, wherein the sound absorbing outer layer (11) and the sound absorbing inner core layer (13) are made of a lightweight polyurethane foam, and the sound absorbing support body (12) Made of hard or semi-rigid polyurethane foam.
The muffler according to claim 1, characterized in that at least one of the sound absorbing outer layer (11), the sound absorbing inner core layer (13) and the sound absorbing support body (12) is a multilayer structure .
A muffler according to claim 2, wherein said muffler further comprises a bottom plate (40), said fixed net (20) being fixed to said bottom plate (40).
The muffler according to claim 1, characterized in that the sound absorbing support (12) is provided with a through hole.
An air conditioner having a duct (100) and a muffler disposed in the duct (100), wherein the muffler is the muffler according to any one of claims 1 to 12.
The air conditioner according to claim 13, wherein the muffler is a plurality of which are sequentially disposed.