CN102927675B - Exhaust muffling device for air-conditioner and noise reduction method - Google Patents
Exhaust muffling device for air-conditioner and noise reduction method Download PDFInfo
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- CN102927675B CN102927675B CN201210445850.3A CN201210445850A CN102927675B CN 102927675 B CN102927675 B CN 102927675B CN 201210445850 A CN201210445850 A CN 201210445850A CN 102927675 B CN102927675 B CN 102927675B
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- 238000000034 method Methods 0.000 title abstract description 12
- 230000009467 reduction Effects 0.000 title abstract description 5
- 230000003584 silencer Effects 0.000 claims description 58
- 230000030279 gene silencing Effects 0.000 claims description 40
- 238000005219 brazing Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 description 12
- 238000003466 welding Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001743 silencing effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The invention discloses a kind of exhaust muffling device for air-conditioner and noise reduction method.Described exhaust muffling device for air-conditioner comprises muffler cavity, the first pipe arrangement and the second pipe arrangement.Muffler cavity two ends arrange the first access tube and the second access tube respectively.One end of first pipe arrangement is communicated with compressor exhaust pipe, and the other end is inserted into muffler cavity from the first access tube, and the splicing position between the first pipe arrangement and the first access tube seals; One end of second pipe arrangement is inserted into muffler cavity from the second access tube, and the other end and compressor air-discharging circulatory system pipeline connection, the splicing position between the second pipe arrangement and the second access tube seals.Muffler assembly in the present invention can carry out noise reduction according to special frequency channel, and has the advantage that volume is little, production cost is low.
Description
Technical Field
The invention relates to an exhaust silencing part of an air conditioner, in particular to an exhaust silencing device and a silencing method of the air conditioner.
Background
In the design process of the air conditioner, due to the problems of box body materials, the area of the two devices, the capacity, the type and the characteristics of a compressor, piping design, system debugging and matching and the like, overlarge airflow sound of an exhaust pipeline or pipeline vibration can be caused, and abnormal noise is generated and the comfort of a user is influenced when the airflow sound is transmitted to an indoor unit through a connecting pipe in serious cases. When this occurs, the most common approach is to add a muffler to the exhaust line. If the exhaust pipeline generates serious airflow sound, two silencers are connected in series or a silencer with larger volume is adopted to eliminate the noise. When the two mufflers are connected in series, the hidden trouble of air flow leakage caused by poor welding can be increased due to the increase of welding points. The patent with publication number CN201589393U discloses an air conditioner exhaust silencer, which comprises a first compressor exhaust pipe, a silencer and a second compressor exhaust pipe, wherein the first compressor exhaust pipe and the second compressor exhaust pipe are respectively installed at two ends of the silencer through a welding process. The middle part of the silencer is in a reducing design, and the diameter of the middle part of the silencer is 0.25-0.4 times of the diameter of the cylinders at the two ends. Although the air conditioner exhaust silencer avoids the series connection of two silencers and saves materials and space, the reducing design in the middle of the silencers is difficult to process due to complex structure and difficult to control the specification and characteristics of products. And even if the two silencing devices can eliminate the noise in the exhaust pipeline to a greater extent, the noise of certain specific frequencies cannot be eliminated. Meanwhile, the two silencers cannot be installed in a smaller box body due to larger volume.
In view of the above, it is desirable to provide an air conditioner exhaust silencer that can eliminate specific frequencies, and that is small and inexpensive to manufacture.
Disclosure of Invention
The invention aims to provide an air conditioner exhaust silencer which can eliminate specific frequency and has small volume and low production cost and a silencing method of the air conditioner exhaust silencer.
According to an aspect of the present invention, there is provided an air conditioner exhaust silencer including: a muffler cavity, a first piping and a second piping;
the silencer cavity is provided with a first access pipe and a second access pipe at two ends respectively;
one end of the first tubing is communicated with an air inlet of the compressor exhaust pipe, the other end of the first tubing is inserted into the muffler cavity from the first access pipe, and the splicing position between the first tubing and the first access pipe is sealed;
one end of a second tubing is inserted into the muffler cavity from a second access pipe, the other end of the second tubing is communicated with a pipeline of a compressor exhaust circulation system, and the splicing position between the second tubing and the second access pipe is sealed;
the silencer cavity eliminates specific frequency bands in sound waves generated by vibration of the compressor.
Wherein, the muffler cavity specifically includes:
the silencer comprises a silencing cavity, an inlet gradually-expanding cavity and an outlet gradually-contracting cavity, wherein the inlet gradually-expanding cavity and the outlet gradually-expanding cavity are respectively arranged at two ends of the silencing cavity;
the large-caliber end of the inlet gradually-expanding cavity is connected with the silencing cavity, and the small-caliber end of the inlet gradually-expanding cavity is fixedly connected with the first access pipe;
the large-caliber end of the outlet reducing cavity is connected with the silencing cavity, and the small-caliber end of the outlet reducing cavity is fixedly connected with the second access pipe.
Preferably, the length of insertion of the first pipe and the second pipe into the sound-deadening chamber is adjustable.
Further, the first pipe is inserted into the sound-deadening chamber at 1/2 times the length of the sound-deadening chamber, and the second pipe is inserted into the sound-deadening chamber at 1/4 times the length of the sound-deadening chamber.
Preferably, the first access tube and the inlet tapered cavity are integrally formed, and the second access tube and the outlet tapered cavity are integrally formed.
Wherein the gradually-expanding form of the inlet gradually-expanding cavity is linear gradually-expanding or curve gradually-expanding;
the tapered form of the outlet tapered cavity is a straight line taper or a curve taper.
Preferably, the insertion part of the first pipe and the first access pipe is welded by brazing;
the splicing part of the second tubing and the second access tube is welded by brazing.
One end of the first tubing is welded with the air inlet of the compressor exhaust pipe through brazing;
the other end of the second pipe is welded with the pipeline of the compressor exhaust circulation system by brazing.
Preferably, the first pipe and the second pipe are provided with positioning marks for marking the lengths of the first pipe and the second pipe inserted into the sound-deadening chamber.
Preferably, an oil return hole is formed in the pipe body, inserted into the muffler cavity, of the second pipe, and the oil return hole is a through hole and used for guiding oil stored in the muffler cavity into a pipeline of an exhaust circulation system of the compressor.
Preferably, the muffler cavity is made of iron, and the first pipe and the second pipe are made of red copper.
According to another aspect of the present invention, there is provided a silencing method for an exhaust silencer of an air conditioner, the exhaust silencer comprises a silencer cavity, a first pipe and a second pipe, wherein two ends of the silencer cavity are respectively provided with a first access pipe and a second access pipe; one end of the first tubing is connected with an air inlet of the compressor exhaust pipe, and the other end of the first tubing is inserted into the silencer cavity through the first access pipe; one end of a second tubing is inserted into the muffler cavity through a second access pipe, and the other end of the second tubing is connected with an air outlet of the compressor exhaust pipe;
the method comprises the following steps:
inputting sound waves generated by vibration of the compressor into the muffler cavity by using a first pipe communicated with an air inlet of the compressor exhaust pipe;
and eliminating sound waves of a specific frequency band by utilizing the silencer cavity.
Wherein, the muffler cavity specifically includes:
the silencer comprises a silencing cavity, an inlet gradually-expanding cavity and an outlet gradually-contracting cavity, wherein the inlet gradually-expanding cavity and the outlet gradually-expanding cavity are respectively arranged at two ends of the silencing cavity; the large-caliber end of the inlet gradually-expanding cavity is connected with the silencing cavity, and the small-caliber end of the inlet gradually-expanding cavity is fixedly connected with the first access pipe; the large-caliber end of the outlet reducing cavity is connected with the silencing cavity, and the small-caliber end of the outlet reducing cavity is fixedly connected with the second access pipe;
the specific frequency band is determined by the ratio of the inner diameter of the sound attenuation cavity to the inner diameter of the first piping.
Preferably, the specific frequency band is further determined by the length of the first pipe and the second pipe inserted into the sound-deadening chamber.
The maximum noise cancellation frequency of the specific frequency band is specifically determined according to the following formula:
wherein f isnThe maximum noise reduction frequency of the specific frequency band, c is the propagation speed of sound waves, l is the length of the noise reduction cavity, and n is an integer greater than 0.
The method comprises the steps of filtering periodic leaked sound waves leaked from the sound attenuation cavity by adjusting the lengths of the first and second pipelines inserted into the sound attenuation cavity, wherein the frequency of the periodic leaked sound waves is determined according to the following formula：fn=nc／2l；
Wherein f isnIs the frequency of the periodic leakage sound wave, c is the propagation speed of the sound wave, l is the length of the sound attenuation cavity, and n is an integer greater than 0.
Wherein, the length of the first pipe inserted into the sound-deadening chamber is 1/2 of the length of the silencer, so as to filter the odd part in the periodic leaked sound wave;
a second pipe is inserted into the sound-deadening chamber at 1/4 the length of which is the length of the silencer to filter out even-numbered portions of the periodic leaky sound waves.
According to the technical scheme, the silencer device can realize silencing according to a specific frequency band by adjusting the length of the silencing cavity, and simultaneously filters periodic vibration sound waves in the vibration sound waves of the compressor by adjusting the lengths of the first and second pipes inserted into the silencing cavity. The silencer cavity can achieve good silencing effect only by one cavity, so that the silencer has the advantages of small volume and low production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments and drawings may be devised by those skilled in the art based on the exemplary embodiments shown in the drawings.
FIG. 1 is a schematic view showing the structure of an air conditioner exhaust silencer according to the present invention;
FIG. 2 shows a schematic diagram of the muffler chamber of the present invention;
FIG. 3 is a schematic view showing the structure of the first pipe inserted into the sound-deadening chamber;
FIG. 4 is a schematic view showing the structure of the first pipe inserted into the sound-deadening chamber;
fig. 5 is a schematic view showing a structure in which both the first pipe and the second pipe are inserted into the sound-deadening chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Fig. 1 shows a schematic diagram of the structure of an air conditioner exhaust silencer according to the present invention. As shown in fig. 1, the air conditioner exhaust muffler device includes a muffler chamber 1, a first pipe 2, and a second pipe 3.
Fig. 2 shows a schematic structural view of the muffler chamber 1. As shown in fig. 2, a first access pipe 101 and a second access pipe 102 are respectively disposed at both ends of the muffler chamber 1. The silencer cavity 1 comprises a silencing cavity 105 capable of effectively eliminating noise, and an inlet tapered cavity 103 and an outlet tapered cavity 104, wherein the inlet tapered cavity 103 is arranged at two ends of the silencing cavity 105 and is used for connecting the first access pipe 101, and the outlet tapered cavity 104 is used for connecting the second access pipe 102. The first access pipe 101 is fixedly connected with the inlet gradually-expanding cavity 103; the second access tube 102 is fixedly connected to the outlet tapered lumen 104. Preferably, in the embodiment of the present invention, the first access tube 101 is integrally formed with the inlet tapered cavity 103; the second access tube 102 is integrally formed with the outlet tapered lumen 104.
Wherein, the gradually-expanding form of the inlet gradually-expanding cavity 103 is a straight line gradually-expanding form or a curve gradually-expanding form. The tapered form of the outlet tapered cavity 104 is a straight line taper or a curved line taper. The diverging form of the inlet diverging chamber 103 and the diverging form of the outlet converging chamber 104 are determined by the skilled person according to production requirements or other specific requirements, generally the inlet diverging chamber 103 and the outlet converging chamber 104 are arranged symmetrically on both sides of the sound-deadening chamber 105. The embodiment of the present invention in which the inlet tapered cavity 103 is linearly tapered and the outlet tapered cavity 104 is linearly tapered is merely illustrative, but the inlet tapered cavity 103 is not limited to be linearly tapered and the outlet tapered cavity 104 is not limited to be linearly tapered.
The first pipe 2 is a hollow pipe. One end of the first pipe is connected to the inlet of the compressor discharge pipe, and the other end is inserted into the muffler chamber 1 through the first inlet 101. Wherein,
the connection mode of the first pipe 2 and the air inlet of the compressor exhaust pipe is specifically as follows: the inlet port of the compressor discharge pipe is inserted into the first pipe 2, and the outer surface of the portion of the compressor discharge pipe inserted into the first pipe 2 and the inner surface of the first pipe 2 are welded by brazing.
The connection mode of the first pipe 2 and the first access pipe 101 is specifically as follows: the joint between the first pipe 2 and the first inlet pipe 101 is sealed by brazing. The joint between the first pipe 2 and the first connection pipe 101 is a gap between the outer surface of the portion of the first pipe 2 inserted into the first connection pipe 101 and the inner surface of the first connection pipe.
The second pipe 3 is a hollow pipe. One end of the second pipe is inserted into the muffler chamber 1 through the second inlet 102, and the other end is communicated with the compressor exhaust circulation system pipe. Wherein,
the second pipe 3 is welded to the exhaust gas circulation system pipe by a welding process. Preferably, the second pipe 3 is welded to the compressor discharge circulation system pipe by brazing.
The connection mode of the second piping 3 and the pipeline of the compressor exhaust circulation system is specifically as follows: a part of the compressor discharge circulation pipe is inserted into the second pipe 3, and an outer surface of the part of the compressor discharge circulation pipe inserted into the second pipe 2 is welded to an inner surface of the first pipe 2 by brazing.
The connection mode of the second pipe 3 and the second access pipe 102 is specifically as follows: the joint between the second pipe 3 and the second inlet pipe 102 is sealed by brazing. The joint between the second pipe 3 and the second connection pipe 102 is a gap between the outer surface of the portion of the second pipe 3 penetrating the second connection pipe 102 and the inner surface of the second connection pipe 102.
The length of the silencing chamber 105 of the first pipe 2 inserted into the silencer chamber 1 and the length of the silencing chamber 105 of the second pipe 3 inserted into the silencer chamber 1 are adjustable. Further, the length of the first pipe 2 inserted into the sound-deadening chamber 105 of the muffler chamber 1 is in direct proportion to the length of the second pipe 3 inserted into the sound-deadening chamber 105 of the muffler chamber 1, and specifically, the ratio of the length of the first pipe 2 inserted into the sound-deadening chamber 105 to the length of the second pipe 3 inserted into the sound-deadening chamber 105 is 2: 1. the first pipe 2 and the second pipe 3 are inserted into the muffler chamber 1, whereby the muffler device of the present invention can perform muffling in a specific frequency band. Meanwhile, the proportion of the length of the first tubing 2 inserted into the sound-deadening cavity 105 to the length of the second tubing 3 inserted into the sound-deadening cavity 105 is adjusted, so that the periodic passing frequency can be eliminated, and a good sound-deadening effect can be achieved
Preferably, the first pipe 2 and the second pipe 3 are provided with positioning marks 4 for accurately controlling the lengths of the first pipe 2 and the second pipe 3 inserted into the sound-deadening chamber 105, as shown in fig. 1. The positioning mark 4 may be a scale line, a dot or an asterisk. The shape of the positioning mark 4 in the present embodiment is merely exemplary, and any pattern that can serve as a marker falls within the scope of the invention.
Further, the second pipe 3 is provided with an oil return hole 5 in a pipe body inserted into the muffler chamber 1 and located in the outlet tapered chamber 104, and the oil return hole 5 is a through hole. Because the silencing device is vertically arranged in the exhaust pipeline. The first pipe 2 is provided at an upper portion of the muffler device, and the second pipe 3 is provided at a lower portion of the muffler device. The exhaust of compressor enters into muffler cavity 1 through first piping 2 in, because can mix with micro-oil in the gas of compressor emission when the exhaust, silencing device is long back at the live time, and the trapped oil just can appear in 1 bottoms of muffler cavity, influences silencing device's noise cancelling effect. Therefore, the oil return hole 5 is arranged on the pipe body of the second pipe 3 inserted into the silencer cavity 1, so that the oil stored at the bottom of the silencer cavity 1 can be returned to the exhaust circulation system of the compressor to the maximum extent, and the silencer can always keep good silencing effect.
Further, the oil return hole 5 and the positioning mark 4 are provided on the same side surface of the second pipe 3, and the center of the oil return hole 5 and the center of the positioning mark 4 are on the same straight line. The center of the oil return hole 5 and the center of the positioning mark 4 are on the same straight line, so that when the second pipe 3 and the second access pipe 102 are welded, the proper amount of solder is placed at the positioning mark 4, and the phenomenon that the solder flows down along the second pipe 3 to block the oil return hole due to excessive solder during welding is avoided.
The first pipe 2 and the second pipe 3 are inserted into the muffler chamber 1, whereby the muffler device of the present invention can perform muffling in a specific frequency band. Meanwhile, the ratio of the length of the first pipe 2 inserted into the sound-deadening chamber 105 to the length of the second pipe 3 inserted into the sound-deadening chamber 105 is set to 2: 1, the periodic passing frequency of sound waves generated by the vibration of the compressor can be eliminated, and a good silencing effect is achieved. In the present invention, the specific frequency band is a frequency band corresponding to noise that a person skilled in the art wants to filter out from sound waves generated by vibration of the compressor.
The principle that the silencing device of the present invention can perform silencing for a specific frequency band is explained in detail below.
In the present invention, the sectional area of the sound deadening chamber 105 of the muffler chamber 1 is S1The cross-sectional area of the first pipe 2 is S2The length of the muffler chamber 105 in the muffler chamber 1 is l. The expansion ratio m of the silencer in the invention is as follows:
m=S1／S2(formula 1)
The calculation formula of the silencing volume of the silencing device is as follows:
Wherein;
k is the wave number: <math>
<mrow>
<mi>k</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mn>2</mn>
<mi>π</mi>
</mrow>
<mi>λ</mi>
</mfrac>
<mo>,</mo>
</mrow>
</math> (formula 3)
λ is the wavelength of the sound wave at the gas temperature in the silencer: λ = c/f. (formula 4)
c is the sound velocity (the speed at which sound waves propagate in the refrigerant for air conditioner refrigeration);
f is the frequency of the acoustic wave.
As can be seen from equation 2, sin is2kl =1, the canceling volume has a maximum value. At this time
From equations 3 and 4, one can derive:
so that the maximum silencing frequency:n =0, 1, 2, 3 … (formula 5)
From equation 5, if the length l of the sound-deadening chamber 105 in the muffler chamber 1 is increased, the maximum sound-deadening frequency f of the muffler device is increasednIt shifts to a low frequency. Since the common noise of the air conditioner is usually concentrated on a lower frequency band, the length l of the sound cavity 105 in the muffler cavity 1 can be calculated by substituting the frequency of the noise to be eliminated into formula 5. The sound can be muffled for a specific frequency by using a muffling apparatus whose length of the chamber 105 is calculated.
However, although the above-mentioned muffler device for muffling a specific frequency by calculating the length of the muffling chamber 105 has good muffling performance for the specific frequency, there is a problem of periodic passing of the frequency, which is specifically given by equation 2:
when kl = n pi (n =0, 1, 2 …), Δ Lw =0, i.e. the silencer device for a frequency fn=nc／2l1(n =0, 1, 2 …) sound waves are not muffled, resulting in these frequencies being fn=nc／2l1The acoustic wave of (2) is directly transmitted without being reduced.
Therefore, the frequency of the leakage of the silencer is the periodic leakage sound wave, and the frequency of the periodic leakage sound wave is fnAnd (4) = nc/2 l. In order to overcome the disadvantage that the silencer leaks through the sound waves periodically, the invention adopts a method of inserting the first pipe 2 and the second pipe 3 into the silencer cavity 1.
FIG. 3 is a schematic view showing a structure in which the first pipe 2 is inserted into the sound-deadening chamber 105 of the muffler chamber 1, wherein the sound-deadening chamber 105 of the muffler chamber 1 has a length l1The length of the first piping 2 is l2. The muffling volume of the muffling device after the first pipe 2 is inserted is as follows:
(formula 6)
Wherein,
(formula 7)
(formula 8)
In the formula, PInto-muffler incident sound pressure;
Ptransparent film-muffler transmission sound pressure;
m-expansion ratio.
From the equations 7 and 8, it can be seen that the length l of the first pipe 2 is set2Is 11/2,kl1Where =2n +1 pi, (n =0, 1, 2 …), Δ Lw ≠ 0. Since Δ Lw ≠ 0, it is said that the silencing apparatus has a frequency fn=nc／2l1The acoustic wave (n is an odd number greater than 0) can exert a damping effect. Therefore, the first piping is inserted into the muffler chamber 1 to eliminate the frequency(n is an integer greater than 0) is an odd fraction of n.
FIG. 4 is a schematic view showing a structure in which the first pipe 2 is inserted into the sound-deadening chamber 105 of the muffler chamber 1, wherein the sound-deadening chamber 105 of the muffler chamber 1 has a length l1The length of the first piping 2 is l3. The sound deadening amount of the sound deadening device after the second pipe 3 is inserted is the same as the expressions 6, 7, and 8. And will not be described in detail herein. From the expressions 7 and 8, it can be seen that when the length of the second pipe 3 is l1/4，kl1Where =2n pi (n =0, 1, 2 …), Δ Lw ≠ 0. Since Δ Lw ≠ 0, it is explained that the silencing apparatus has a frequency fn=nc／2l1The sound waves (n is an even number greater than 0) can exert a damping effect. Therefore, the second pipe is inserted into the muffler chamber 1, and the passing frequency can be eliminated(n is an integer greater than 0) is an even portion of n.
Thus, the first pipe 2 and the second pipe 3 are inserted into the muffler chamber 1 of the muffler device of the present invention, and the lengths of the first pipe 2 and the second pipe 3 inserted into the sound-deadening chamber 105 are 1/2 and 1/4, respectively, which are the length of the sound-deadening chamber 105, as shown in fig. 5. Therefore, the silencer of the invention can not only filter the sound wave of the specific frequency, but also eliminate the periodic leakage frequency through the first pipe 2 and the second pipe 3, so that the silencer of the invention can carry out silencing aiming at the specific frequency and has good silencing effect.
In the present invention, the lengths of the first pipe 2 and the second pipe 3 may be the same or different. The lengths of the first piping 2 and the second piping 3 are determined by those skilled in the art according to production requirements or design. In the embodiment of the present invention, the first pipe 2 and the second pipe 3 are different in length.
In the embodiment of the invention, the material of the silencer cavity 1 in the silencer is iron, and the material of the first pipe 2 and the second pipe 3 is red copper, so that the manufacturing cost of the silencer can be reduced to the maximum extent, and the mass production is facilitated.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An air conditioner exhaust silencer comprising: a muffler cavity, a first piping and a second piping;
the silencer cavity is provided with a first access pipe and a second access pipe at two ends respectively;
one end of the first tubing is communicated with an air inlet of the compressor exhaust pipe, the other end of the first tubing is inserted into the muffler cavity from the first access pipe, and the splicing position between the first tubing and the first access pipe is sealed;
one end of a second tubing is inserted into the muffler cavity from a second access pipe, the other end of the second tubing is communicated with a pipeline of a compressor exhaust circulation system, and the splicing position between the second tubing and the second access pipe is sealed;
positioning marks are arranged on the first and second pipes and used for marking the lengths of the first and second pipes inserted into the silencing cavities;
the silencer cavity eliminates a specific frequency band in sound waves generated by vibration of the compressor;
an oil return hole is formed in the pipe body of the second pipe inserted into the silencer cavity;
the oil return hole and the positioning mark on the second pipe are arranged on the same side face of the second pipe, and the center of the oil return hole on the second pipe and the center of the positioning mark are on the same straight line.
2. The air conditioner exhaust silencer according to claim 1, wherein said silencer chamber includes:
the silencer comprises a silencing cavity, an inlet gradually-expanding cavity and an outlet gradually-contracting cavity, wherein the inlet gradually-expanding cavity and the outlet gradually-expanding cavity are respectively arranged at two ends of the silencing cavity;
the large-caliber end of the inlet gradually-expanding cavity is connected with the silencing cavity, and the small-caliber end of the inlet gradually-expanding cavity is fixedly connected with the first access pipe;
the large-caliber end of the outlet reducing cavity is connected with the silencing cavity, and the small-caliber end of the outlet reducing cavity is fixedly connected with the second access pipe.
3. The air conditioner exhaust silencer according to claim 2, wherein the length of insertion of the first pipe and the second pipe into the silencing chamber is adjustable.
4. The air conditioner exhaust muffler device according to claim 3, wherein a first pipe is inserted into the muffler chamber at 1/2 times the length of the muffler chamber, and a second pipe is inserted into the muffler chamber at 1/4 times the length of the muffler chamber.
5. The air conditioner exhaust silencer according to claim 2 wherein said first inlet duct is integrally formed with said inlet tapered chamber and said second inlet duct is integrally formed with said outlet tapered chamber.
6. The air conditioner exhaust muffler device according to claim 2,
the gradually-expanding form of the inlet gradually-expanding cavity is linear gradually-expanding or curve gradually-expanding;
the tapered form of the outlet tapered cavity is a straight line taper or a curve taper.
7. The air conditioner exhaust muffler device according to claim 1,
the splicing part of the first tubing and the first access tube is welded by brazing;
the splicing part of the second tubing and the second access tube is welded by brazing;
one end of the first tubing is welded with the compressor exhaust pipe through brazing;
the other end of the second pipe is welded with the pipeline of the compressor exhaust circulation system by brazing.
8. The air conditioner exhaust silencer according to claim 1, wherein said oil return hole is a through hole for guiding the oil stored inside the silencer chamber to the compressor exhaust circulation system pipe.
9. The exhaust silencer of air conditioner as claimed in claim 1, wherein the silencer chamber is made of iron, and the first and second pipes are made of red copper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210445850.3A CN102927675B (en) | 2012-11-08 | 2012-11-08 | Exhaust muffling device for air-conditioner and noise reduction method |
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| CN201210445850.3A CN102927675B (en) | 2012-11-08 | 2012-11-08 | Exhaust muffling device for air-conditioner and noise reduction method |
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| CN102927675A CN102927675A (en) | 2013-02-13 |
| CN102927675B true CN102927675B (en) | 2015-11-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108488013A (en) * | 2018-05-11 | 2018-09-04 | 杭叉集团股份有限公司 | A kind of fork truck intake muffler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103940002B (en) * | 2014-03-26 | 2016-11-09 | 美的集团股份有限公司 | Buffer unit and there is its air-conditioner outdoor unit |
| CN103925195A (en) * | 2014-03-31 | 2014-07-16 | 扎努西电气机械天津压缩机有限公司 | Refrigerator compressor cylinder structure provided with inner exhaust pipe |
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| CN106322563B (en) * | 2016-09-30 | 2019-04-30 | 芜湖美智空调设备有限公司 | A kind of air-conditioner outdoor unit piping system and air-conditioner outdoor unit |
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| CN107490171A (en) * | 2017-08-01 | 2017-12-19 | 广东美的制冷设备有限公司 | Muffler and there is its air conditioner |
| CN110686398B (en) * | 2019-09-25 | 2020-11-24 | 珠海格力电器股份有限公司 | Silencer with adjustable length and system pressure capable of being automatically adapted and air conditioner |
| CN111472958B (en) * | 2020-03-16 | 2021-09-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Silencer structure, compressor and refrigerator with same |
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