CN110220295A - Silencer and air conditioner - Google Patents

Abstract

The invention discloses a muffler and an air conditioner. The muffler includes: a first muffler structure, the first muffler structure includes an inlet pipe, an air outlet pipe and a muffler, and the muffler includes a first expansion cavity and a At least two through holes on the side wall, the air inlet pipe and the air outlet pipe are all in communication with the first expansion chamber; the second sound-absorbing structure, the second sound-absorbing structure includes the second expansion chamber, and the first sound-absorbing structure is arranged in the second expansion chamber; and The partition, the partition is arranged between the outer wall of the first sound-absorbing structure and the inner wall of the second expansion chamber and divides the second expansion chamber into a first cavity and a second cavity, and the first cavity communicates with the first cavity through at least one through hole The first expansion cavity is communicated, the second cavity is communicated with the first expansion cavity through at least one through hole, and the partition plate can move relative to the first sound-absorbing structure so that the volumes of the first cavity and the second cavity can be adjusted. The muffler can realize full frequency band muffler, and the muffler effect is good.

Description

Muffler and air conditioner

technical field

The invention relates to the technical field of household appliances, in particular to a muffler and an air conditioner.

Background technique

The muffler refers to the airflow pipeline with noise transmission at the same time, the noise reduction device can be used to attenuate the noise in the pipeline by using the pipeline with the sound-absorbing lining and the elbow or the pipeline with a sudden change in the cross-sectional area and other pipelines with discontinuous acoustic impedance. or reflect back. The former is called a resistive muffler, the latter is called a resistive muffler, and there are also impedance composite mufflers.

At present, the mufflers traditionally used on air-conditioning pipelines are limited in the muffler range, resulting in the interaction between the air flow pulsation and the muffler wall to form resonance, which reduces the muffler effect and seriously affects the user experience.

Contents of the invention

Based on this, in order to solve the problem that the limitation of the traditional muffler's muffler frequency range causes the air flow pulsation to interact with the muffler wall to form resonance, thereby reducing the muffler effect and seriously affecting the user experience, a muffler and air conditioner is proposed. The whole frequency band noise reduction can be realized, and the noise reduction effect is good; the air conditioner includes the above-mentioned silencer, therefore, the air conditioner has the advantage of good noise reduction effect.

The specific technical scheme is as follows:

On the one hand, the present application relates to a muffler, comprising: a first muffler structure, the first muffler structure includes an inlet pipe, an outlet pipe and a muffler, the muffler includes a first expansion cavity and is arranged on the first At least two through holes on the side wall of the expansion chamber, the air inlet pipe and the air outlet pipe are all in communication with the first expansion chamber; the second sound-absorbing structure, the second sound-absorbing structure includes the second expansion chamber, so The first sound-absorbing structure is arranged in the second expansion chamber; and a partition is arranged between the outer wall of the first sound-absorbing structure and the inner wall of the second expansion chamber and the second expansion chamber The cavity is divided into a first cavity and a second cavity, the first cavity communicates with the first expansion cavity through at least one through hole, and the second cavity communicates with the first expansion cavity through at least one through hole. The first expansion cavity is connected, and the partition plate can move relative to the first sound-absorbing structure so that the volumes of the first cavity and the second cavity can be adjusted.

When the above-mentioned muffler is in use, the airflow enters the first expansion cavity along the intake pipe, then enters the first cavity and the second cavity respectively along the through hole, and enters after passing through the first expansion cavity, the through hole and the second expansion cavity. The air outlet pipe is discharged; furthermore, since the partition plate can move relative to the first sound-absorbing structure, the volumes of the first cavity and the second cavity can be adjusted, and the volume in the second expansion cavity can be adjusted. Noise reactance to eliminate noise in various frequency bands.

The technical scheme is further described below:

In one of the embodiments, the first sound-absorbing structure is movably arranged in the second expansion cavity, and the partition is fixed on the outer wall of the first sound-absorbing structure, so that the first sound-absorbing structure can Driving the partition to move is used to adjust the volumes of the first cavity and the second cavity.

In one of the embodiments, the second sound-absorbing structure includes a first installation hole and a second installation hole, the first installation hole and the second installation hole communicate with the second expansion cavity, and the air intake pipe The outer diameter and/or the outer diameter of the outlet pipe is smaller than the outer diameter of the muffler, one end of the inlet pipe is connected to the muffler, one end of the outlet pipe is connected to the muffler, and the inlet pipe is connected to the muffler. The other end of the trachea is movably arranged in the first installation hole, the other end of the air outlet pipe is movably arranged in the second installation hole, and the sound-absorbing member is arranged in the second expansion chamber.

In one of the embodiments, the muffler further includes a power output mechanism, the power output mechanism is arranged in the second expansion cavity, and the output end of the power output mechanism is connected with the partition for driving the The partition moves so that the volumes of the first cavity and the second cavity can be adjusted.

In one of the embodiments, the second sound-absorbing structure further includes a first installation housing and a second installation housing, the first installation housing includes a third cavity, and the second installation housing includes a fourth cavity , one end of the first mounting shell protrudes into the fourth cavity, and the third cavity communicates with the fourth cavity to form the second expansion cavity.

In one of the embodiments, the muffler further includes a first muffler layer and a second muffler layer, the first muffler layer is coated or coated on the inner wall of the third cavity, and the second muffler layer is coated covering or covering the inner wall of the fourth cavity.

In one of the embodiments, the first sound-absorbing layer and the second sound-absorbing layer are spaced apart to form a moving groove, and one end of the partition is arranged in the moving groove.

In one of the embodiments, the muffler further includes a first protective layer, and the first protective layer is coated or coated on the outer wall of the first muffler layer; and/or the muffler further includes a second protective layer , the second protective layer is coated or wrapped on the outer wall of the second sound-absorbing layer.

In one embodiment, the diameter of the through hole is D, where 0.5mm≤D≤2mm.

On the other hand, the present application also relates to an air conditioner, including the muffler in any one of the above embodiments.

When the above-mentioned air conditioner is in use, the airflow enters the first expansion cavity along the intake pipe, then enters the first cavity and the second cavity respectively along the through hole, and enters the outlet after passing through the first expansion cavity, the through hole and the second expansion cavity. The trachea is discharged; further, since the partition plate can move relative to the first sound-absorbing structure, the volumes of the first cavity and the second cavity can be adjusted, thereby adjusting the noise in the second expansion cavity Acoustic reactance to eliminate noise in various frequency bands.

Description of drawings

Fig. 1 is the structural representation of muffler;

Fig. 2 is a schematic diagram of the first noise reduction structure.

Explanation of reference signs:

10. Muffler, 100, first silencing structure, 110, intake pipe, 120, air outlet pipe, 130, silencing member, 132, through hole, 140, partition, 200, second silencing structure, 210, second expansion cavity , 212, the first cavity, 214, the second cavity, 220, the first installation shell, 230, the second installation shell, 310, the first sound-absorbing layer, 320, the second sound-absorbing layer, 330, the moving slot.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "fixed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

It should be pointed out that when an element is referred to as being "fixed on" another element, the two elements may be integrated or detachably connected between the two elements.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, it should be understood that in this embodiment, the terms "lower", "upper", "front", "rear", "left", "right", "inner", "outer", "top" , "bottom", "one side", "the other side", "one end", "the other end", etc. indicate the positional relationship based on the positional relationship shown in the drawings; "first", "second" and other terms are used to distinguish different structural components. These terms are only for the convenience of describing the present invention and simplifying the description, and should not be construed as limiting the present invention.

As shown in Fig. 1 and Fig. 2, a kind of muffler 10 in one embodiment comprises: the first muffler structure 100, and the first muffler structure 100 comprises inlet pipe 110, air outlet pipe 120 and muffler 130, and muffler 130 comprises The first expansion chamber and at least two through holes 132 arranged on the side wall of the first expansion chamber, the air outlet of the air inlet pipe 110 and the air inlet of the air outlet pipe 120 are all in communication with the first expansion chamber; the second sound-absorbing structure 200 , the second sound-absorbing structure 200 includes a second expansion cavity 210, the first sound-absorbing structure 100 is arranged in the second expansion cavity 210, and the second expansion cavity 210 communicates with the first expansion cavity through the through hole 132; and a partition 140, a partition 140 It is arranged between the outer wall of the first sound-absorbing structure 100 and the inner wall of the second expansion cavity 210 and divides the second expansion cavity 210 into a first cavity 212 and a second cavity 214, and the first cavity 212 passes through at least one through hole 132 communicates with the first expansion cavity, the second cavity 214 communicates with the first expansion cavity through at least one through hole 132, and the partition 140 can move relative to the first sound-absorbing structure 100 so that the first cavity 212 and the second cavity 214 The volume is adjustable.

When the above-mentioned muffler 10 is in use, the airflow enters the first expansion chamber along the intake pipe 110, then enters the second expansion chamber 210 along the through hole 132, and enters after passing through the first expansion chamber, the through hole 132 and the second expansion chamber 210 for silencer. The air outlet pipe 120 is discharged; further, since the partition plate 140 can move relative to the first sound-absorbing structure 100, the volumes of the first cavity 212 and the second cavity 214 can be adjusted, and then the acoustic reactance of the noise in the second expansion cavity 210 can be adjusted. , to eliminate noise in each frequency band. In this embodiment, the thickness of the partition 140 is 3mm-5mm, preferably, the thickness of the partition 140 is 4mm.

As shown in FIG. 1 , in this embodiment, there are multiple through holes 132 arranged at intervals along the circumferential direction of the sound dampening member 130 . The through holes 132 may be arranged in a triangular manner or in a rectangular manner.

As shown in Figure 1, on the basis of the above-mentioned embodiment, the first sound-absorbing structure 100 is movably arranged in the second expansion cavity 210, and the partition plate 140 is fixed on the outer wall of the first sound-absorbing structure 100, so that the first sound-absorbing structure 100 can drive the partition plate 140 to move to adjust the volumes of the first cavity 212 and the second cavity 214 . In this way, the volume of the first cavity 212 and the second cavity 214 can be adjusted by driving the first sound-absorbing structure 100 to move to drive the partition 140 to adjust the acoustic reactance of the noise in the second expansion cavity 210 . Specifically, a corresponding driving mechanism may be provided, such as a linear motor or a linear module to drive the first noise-absorbing structure 100 to move, or human power to push the first noise-absorbing structure 100 to move. Further, the rigidity of the first sound-absorbing structure 100 can be enhanced through the partition plate 140 , and the radiated regenerated noise of the first sound-absorbing structure 100 can be reduced.

As shown in FIG. 1 , specifically in this embodiment, the second sound-absorbing structure 200 includes a first installation hole and a second installation hole, both of which communicate with the second expansion cavity 210 , and the air intake pipe The outer diameter of 110 and/or the outer diameter of air outlet pipe 120 is smaller than the outer diameter of muffler 130, and one end of air inlet pipe 110 is connected with muffler 130, and one end of air outlet pipe 120 is connected with muffler 130, and the other end of air inlet pipe 110 can be It is movably arranged in the first installation hole, the other end of the air outlet pipe 120 is movably arranged in the second installation hole, and the muffler 130 is arranged in the second expansion cavity 210 . Because the outer diameter of the air inlet pipe 110 and/or the outer diameter of the outlet pipe 120 is smaller than the outer diameter of the muffler 130, the muffler 130 has a position-limiting function to limit the moving distance of the first muffler structure 100, thereby ensuring the sound quality of the muffler. 10 can eliminate noise in a specific frequency range. Specifically, the distance between the sound absorbing member 130 and the first installation hole is L ₁ , and the length of the second sound absorbing structure 200 is L, wherein, L ₁ =1/5L˜1/3L. Specifically, the diameter of the intake pipe 110 is D ₁ , where D ₁ =15 mm to 30 mm, and the diameter of the exhaust pipe is D ₂ , where D ₂ =15 mm to 30 mm, preferably, D ₁ =D ₂ =20 mm. Specifically, the diameter of the first expansion lumen is D ₃ , where D ₃ /D ₁ =2-5, preferably, D ₃ /D ₁ =3; specifically, the thickness of the sound-absorbing member 130 is t, where t=2mm ~3mm, preferably t=3mm.

Of course, in other embodiments, the muffler 10 also includes a power output mechanism, the power output mechanism is arranged in the second expansion cavity 210, and the output end of the power output mechanism is connected to the partition 140 for driving the partition. The plate 140 moves to make the volumes of the first cavity 212 and the second cavity 214 adjustable. In this way, a power output mechanism can be set in the second expansion chamber 210 to drive the partition 140 to move, so as to automatically drive the partition 140 to move; specifically, the power output mechanism can be a linear motor or a linear module.

As shown in FIG. 1 , on the basis of any of the above-mentioned embodiments, the second sound-absorbing structure 200 further includes a first installation housing 220 and a second installation housing 230 , the first installation housing 220 includes a third cavity, and the first installation housing 220 includes a third cavity. The second installation housing 230 includes a fourth cavity, one end of the first installation housing 220 protrudes into the fourth cavity, and the third cavity communicates with the fourth cavity to form the second expansion cavity 210 . In this way, the volume of the second expansion cavity 210 can be adjusted through the cooperation of the first installation shell 220 and the second installation shell 230 to form the second expansion cavity 210, thereby eliminating noise in more frequency bands; further, in this embodiment Basically, the first installation housing 220 is movably disposed in the fourth cavity for adjusting the volume of the second expansion cavity 210; of course, in other embodiments, the fourth cavity is provided with multiple first connections part, the outer wall of the first installation housing 220 is provided with a second connection part connected to the first connection part, and the second connection part can be selectively connected to the first connection part for adjusting the volume of the second expansion chamber 210 .

As shown in FIG. 1 , specifically in this embodiment, the muffler 10 further includes a first muffler layer 310 and a second muffler layer 320 , the first muffler layer 310 is coated or coated on the inner wall of the third cavity, The second sound-absorbing layer 320 is coated or clad on the inner wall of the fourth cavity. In this way, the sound-absorbing effect of the first sound-absorbing layer 310 and the second sound-absorbing layer 320 is used to improve the sound-absorbing effect of the sound absorber 10; specifically, the first sound-absorbing layer 310 and the second sound-absorbing layer 320 can be fiber sound-absorbing materials, glass wool, etc. ; Preferably, the first sound-absorbing layer 310 and the second sound-absorbing layer 320 are ultra-fine glass wool with a bulk density of 20kg/m ³ .

As shown in FIG. 1 , further, the first sound-absorbing layer 310 and the second sound-absorbing layer 320 are arranged at intervals to form a moving groove, and one end of the partition 140 is arranged in the moving groove 330 . In this way, the moving distance of the baffle 140 is restricted by the moving slot 330 , thereby eliminating noise in a specific frequency range.

Specifically in this embodiment, the muffler 10 further includes a first protective layer, and the first protective layer is coated or covered on the outer wall of the first muffler layer 310 . In this way, the first sound-absorbing layer 310 is protected by the first protective layer to prevent the first sound-absorbing layer 310 from being damaged; specifically, the first protective layer may be a protective net.

Specifically in this embodiment, the muffler 10 further includes a second protective layer, and the second protective layer is coated or covered on the outer wall of the second muffler layer 320 . In this way, the second sound-absorbing layer 320 is protected by the second protective layer to prevent the second sound-absorbing layer 320 from being damaged; specifically, the second protective layer may be a protective net.

In any of the above-mentioned embodiments, the diameter of the through hole 132 is D, where 0.5mm≤D≤2mm. When the diameter of the through hole 132 is within this range, the noise reduction effect is better; specifically, D can be 0.5mm, 0.8mm, 1mm, 1.5mm and 2mm. Specifically, the perforation rate of the sound-absorbing member 130 is 1% to 5%. When the perforation rate is within this range, the sound-absorbing effect is better; preferably, the perforation rate of the sound-absorbing member 130 is 3.5%, where the perforation rate refers to the 130 surface, the proportion occupied by the through holes 132 .

It is necessary to point out that when in use, when there is refrigerant or other harmful refrigerants in the intake pipe 110, it is necessary to seal the gap between the intake pipe 110 and the first installation hole and seal the air outlet pipe 120 through a seal. and the gap between the second installation hole; when there are other harmless refrigerants such as carbon dioxide in the intake pipe 110, there may be a gap between the intake pipe 110 and the first installation hole, and the outlet pipe 120 and the second installation hole There may be a gap between the two mounting holes. In addition, the gap between the partition 140 and the inner wall of the second expansion cavity 210 is small, and preferably, the gap between the partition 140 and the inner wall of the second expansion cavity 210 is sealed.

An air conditioner in an embodiment includes the muffler 10 in any of the above embodiments.

When the above-mentioned air conditioner is in use, the airflow enters the first expansion chamber along the intake pipe 110, then enters the second expansion chamber 210 along the through hole 132, and enters the air outlet pipe after passing through the first expansion chamber, the through hole 132 and the second expansion chamber 210 for silencer 120 discharge; further, since the partition plate 140 can move relative to the first sound-absorbing structure 100, the volumes of the first cavity 212 and the second cavity 214 can be adjusted, and then the acoustic reactance of the noise in the second expansion cavity 210 can be adjusted, so as to Eliminates noise in various frequency bands.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A silencer, characterized in that, comprising: A first sound-absorbing structure, the first sound-absorbing structure includes an air inlet pipe, an air outlet pipe, and a sound-absorbing member, and the sound-absorbing member includes a first expansion chamber and at least two through holes arranged on the side wall of the first expansion chamber, Both the air inlet pipe and the air outlet pipe are in communication with the first expansion chamber; A second sound-absorbing structure, the second sound-absorbing structure includes a second expansion chamber, the first sound-absorbing structure is disposed in the second expansion chamber; and a partition, the partition is arranged between the outer wall of the first sound-absorbing structure and the inner wall of the second expansion chamber and divides the second expansion chamber into a first cavity and a second cavity, the The first cavity communicates with the first expansion cavity through at least one through hole, the second cavity communicates with the first expansion cavity through at least one through hole, and the partition can be opposite to all The movement of the first sound-absorbing structure makes the volumes of the first cavity and the second cavity adjustable. 2. The muffler according to claim 1, wherein the first muffler structure is movably arranged in the second expansion cavity, and the partition is fixed on the outer wall of the first muffler structure , so that the first sound-absorbing structure can drive the partition to move to adjust the volumes of the first cavity and the second cavity. 3. The muffler according to claim 1, wherein the second muffler structure comprises a first installation hole and a second installation hole, and the first installation hole and the second installation hole are connected with the second expansion The cavities are connected, the outer diameter of the air inlet pipe and/or the outer diameter of the air outlet pipe is smaller than the outer diameter of the muffler, one end of the air inlet pipe is connected to the muffler, and one end of the air outlet pipe is connected to As for the noise damper, the other end of the air intake pipe is movably arranged in the first installation hole, the other end of the outlet pipe is movably arranged in the second installation hole, and the noise reduction member is arranged in the Inside the second expansion lumen. 4. The muffler according to claim 1, further comprising a power output mechanism, the power output mechanism is arranged in the second expansion cavity, and the output end of the power output mechanism is connected to the partition The plate connection is used to drive the partition to move, so that the volumes of the first cavity and the second cavity can be adjusted. 5. The muffler according to claim 1, wherein the second muffler structure further comprises a first mounting shell and a second mounting shell, the first mounting shell comprises a third cavity, and the first mounting shell comprises a third cavity. The second installation housing includes a fourth cavity, one end of the first installation housing protrudes into the fourth cavity, and the third cavity communicates with the fourth cavity to form the second expansion cavity. 6. The muffler according to claim 5, further comprising a first muffler layer and a second muffler layer, the first muffler layer is coated or coated on the inner wall of the third cavity, so The second sound-absorbing layer is coated or coated on the inner wall of the fourth cavity. 7 . The muffler according to claim 6 , wherein the first sound-absorbing layer and the second sound-absorbing layer are arranged at intervals to form a moving groove, and one end of the partition plate is arranged in the moving groove. 8 . 8. The muffler according to claim 6, further comprising a first protective layer, the first protective layer is coated or covered on the outer wall of the first sound-absorbing layer; and/or further comprising a second Two protective layers, the second protective layer is coated or wrapped on the outer wall of the second sound-absorbing layer. 9. The muffler according to any one of claims 1 to 8, characterized in that the diameter of the through hole is D, where 0.5mm≤D≤2mm. 10. An air conditioner, characterized by comprising the muffler according to any one of claims 1-9.