CN112785994A - Noise eliminator and air conditioner - Google Patents
Noise eliminator and air conditioner Download PDFInfo
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- CN112785994A CN112785994A CN202110117166.1A CN202110117166A CN112785994A CN 112785994 A CN112785994 A CN 112785994A CN 202110117166 A CN202110117166 A CN 202110117166A CN 112785994 A CN112785994 A CN 112785994A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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Abstract
The application provides a noise eliminator and air conditioner. The muffler device comprises an expansion chamber (1) and a pipe arranged at least one end of the expansion chamber (1), wherein an inlet end of the expansion chamber (1) is provided with a pipe inlet outlet (2) for air flow to enter the expansion chamber (1), an outlet end of the expansion chamber (1) is provided with a pipe outlet inlet (3) for air flow to flow out of the expansion chamber (1), at least one of the pipe inlet outlet (2) and the pipe outlet (3) is arranged on the pipe, and on the cross section of the expansion chamber (1), the projection of the pipe inlet outlet (2) and the projection of the pipe outlet (3) are arranged in a staggered manner. According to the silencer, the silencer can effectively eliminate high-frequency sound, the silencing frequency range is prevented from being narrowed, and the silencing effect is improved.
Description
Technical Field
The application relates to the technical field of noise reduction, in particular to a noise elimination device and an air conditioner.
Background
The existing silencer used for the air suction and exhaust pipe of the air conditioner is an expansion chamber silencer, the silencing principle of the silencer is shown in fig. 6, when sound enters the expansion chamber from the inlet end, sound waves can be transmitted in the expansion chamber in a plane wave mode due to sudden change of the section of the expansion chamber, the sound waves can be reflected when the sound waves are transmitted to the plane of the outlet end, the reflected sound waves and the transmitted sound waves can interfere due to phase difference, and the purpose of silencing is achieved.
In order to increase the amount of noise reduction, it is generally necessary to increase the inner diameter of the expansion chamber, so that when the cross-sectional area of the expansion chamber is too large, the sound waves at high frequency no longer remain approximately plane waves in the expansion chamber, but are concentrated in the middle of the expansion chamber to pass through as narrow sound beams, and are directly transmitted out through the outlet pipe, so that the noise reduction effect is significantly reduced.
Disclosure of Invention
Therefore, the technical problem to be solved by the present application is to provide a muffler device and an air conditioner, which can ensure effective muffling of high-frequency sound by the muffler device, avoid narrowing of muffling frequency range, and improve muffling effect.
In order to solve the above problems, the present application provides a muffler device, comprising an expansion chamber and a pipe arranged at least one end of the expansion chamber, wherein the inlet end of the expansion chamber is provided with an inlet pipe outlet for air flow to enter the expansion chamber, the outlet end of the expansion chamber is provided with an outlet pipe inlet for air flow to flow out of the expansion chamber, at least one of the inlet pipe outlet and the outlet pipe inlet is arranged on the pipe, and on the cross section of the expansion chamber, the projection of the inlet pipe outlet and the projection of the outlet pipe inlet are arranged in a staggered manner.
Preferably, the inlet end of the expansion chamber is provided with an inlet connecting pipe, the outlet end of the expansion chamber is provided with an outlet connecting pipe, the connecting pipe comprises an air inlet pipe arranged on the inlet connecting pipe, the air inlet pipe comprises an inlet pipe outlet, the outlet connecting pipe comprises an outlet pipe inlet, and the inlet pipe outlet and the outlet pipe inlet are arranged in a projection staggered mode on the cross section of the expansion chamber.
Preferably, the air inlet pipe comprises an insertion end inserted into the expansion chamber, the insertion end is provided with an expansion section, and the end surface of the expansion section facing the outlet connecting pipe is provided with a pipe inlet outlet.
Preferably, the inlet connecting pipe and the outlet connecting pipe are both round pipes, the number of the inlet pipe outlets is multiple, the multiple inlet pipe outlets are arranged at intervals along the circumferential direction of the inlet connecting pipe, and the projection of the inlet pipe outlets on the cross section of the expansion chamber is positioned on the outer peripheral side of the projection of the outlet connecting pipe on the cross section of the expansion chamber.
Preferably, the expanding section is trumpet-shaped, a shunt cone is arranged in the expanding section, and the outlet of the inlet pipe is positioned on the annular end face between the shunt cone and the outer peripheral wall of the expanding section.
Preferably, the peripheral wall of the air inlet pipe is provided with a limiting bulge, and the limiting bulge is stopped outside the inlet connecting pipe.
Preferably, the total area of the inlet duct outlets is equal to the area of the inlet openings of the inlet ducts.
Preferably, the inlet end of the expansion chamber is provided with an inlet connecting pipe, the outlet end of the expansion chamber is provided with an outlet connecting pipe, the connecting pipe comprises an air inlet pipe arranged on the inlet connecting pipe and an air outlet pipe arranged on the outlet connecting pipe, the air inlet pipe comprises an inlet pipe outlet, the air outlet pipe comprises an outlet pipe inlet, and the inlet pipe outlet and the outlet pipe inlet are arranged in a projection dislocation mode on the cross section of the expansion chamber.
Preferably, the air inlet pipe is bent by a first preset angle relative to the extending direction of the expansion chamber, the air outlet pipe is bent by a second preset angle relative to the extending direction of the expansion chamber, and the bending direction of the air inlet pipe is different from that of the air outlet pipe.
Preferably, the bending direction of the inlet pipe is opposite to that of the outlet pipe.
Preferably, the first preset angle and the second preset angle are the same, and the angle ranges from 15 degrees to 45 degrees.
Preferably, the air inlet pipe extends into the sound attenuation cavity of the expansion chamber by a preset length.
Preferably, the expansion chamber comprises an inlet divergent section, a straight cylinder section and an outlet convergent section which are sequentially arranged along the gas flowing direction, the inlet connecting pipe is connected to the inlet divergent section, the outlet connecting pipe is connected to the outlet convergent section, and the silencing cavity is a cavity formed by the straight cylinder section 12.
Preferably, the length of the straight cylinder section is l1A predetermined length of l2，l2＝l1/2, or l2＝l1/4。
Preferably, the air outlet pipe extends into the sound attenuation cavity of the expansion chamber for a preset length.
According to another aspect of the present application, there is provided an air conditioner including a muffler device as described above.
The utility model provides a noise eliminator, including expansion chamber and the piping of setting in the at least one end of expansion chamber, the entrance point of expansion chamber has the pipe export of advancing that the air feed stream enters into the expansion chamber, and the exit end of expansion chamber has the exit tube import that the air feed stream flows out the expansion chamber, advances at least one of pipe export and exit tube import and sets up on the piping, on the cross section of expansion chamber, advances the projection of pipe export and the projection dislocation set of exit tube import. The silencer enables the projections of the inlet pipe outlet and the outlet pipe inlet on the cross section of the expansion chamber to be arranged in a staggered mode, the sound waves in the high frequency range can not penetrate through the middle of the expansion chamber under the condition that the diameter of the expansion chamber of the silencer is unchanged, the sound waves can still be silenced in the expansion chamber through the reflection effect, low-frequency sound and high-frequency sound can be eliminated, effective silencing of the silencer on the high-frequency sound is guaranteed, the silencing frequency range of the silencer can not be narrowed, and the silencing effect is improved.
Drawings
FIG. 1 is a cross-sectional structural view of a muffler assembly according to an embodiment of the present application;
fig. 2 is a sectional structural view of an extension chamber of a muffler device according to an embodiment of the present application;
fig. 3 is a sectional structural view of an intake pipe of a muffler device according to an embodiment of the present application;
FIG. 4 is a structural dimension view of a muffler assembly according to an embodiment of the present application;
FIG. 5 is a cross-sectional structural view of a muffler assembly according to an embodiment of the present application;
fig. 6 is a schematic diagram of the silencing of a prior art silencing device.
The reference numerals are represented as:
1. an expansion chamber; 2. an inlet pipe outlet; 3. an outlet pipe inlet; 4. an inlet connection pipe; 5. an outlet connection pipe; 6. an air inlet pipe; 7. an air outlet pipe; 8. an expansion section; 9. a spreader cone; 10. a limiting bulge; 11. an inlet divergent section; 12. a straight cylinder section; 13. an outlet tapered section.
Detailed Description
Referring to fig. 1 to 5 in combination, according to an embodiment of the present application, the muffler device includes an expansion chamber 1 and a pipe disposed at least one end of the expansion chamber 1, an inlet end of the expansion chamber 1 has an inlet pipe outlet 2 for air to flow into the expansion chamber 1, an outlet end of the expansion chamber 1 has an outlet pipe inlet 3 for air to flow out of the expansion chamber 1, at least one of the inlet pipe outlet 2 and the outlet pipe inlet 3 is disposed on the pipe, and a projection of the inlet pipe outlet 2 and a projection of the outlet pipe inlet 3 are disposed in a staggered manner on a cross section of the expansion chamber 1.
The silencer enables the projections of the inlet pipe outlet 2 and the outlet pipe inlet 3 on the cross section of the expansion chamber 1 to be arranged in a staggered mode, the sound waves in a high frequency range can not be concentrated in the middle of the expansion chamber 1 to penetrate under the condition that the diameter of the expansion chamber 1 of the silencer is unchanged, the sound waves can still be silenced in the expansion chamber 1 through reflection, low-frequency sound and high-frequency sound can be eliminated, effective silencing of the silencer on the high-frequency sound is guaranteed, the silencing frequency range of the silencer is guaranteed not to narrow, and the silencing effect is improved.
The projection of the pipe inlet 2 and the projection dislocation set of the pipe outlet 3 comprise two conditions, the first condition is that the projection of the pipe inlet 2 and the projection of the pipe outlet 3 are overlapped, the partial dislocation is realized, the second condition is that the projection of the pipe inlet 2 and the projection of the pipe outlet 3 are completely staggered, the two conditions can play a role in eliminating low-frequency sound and high-frequency sound, the effective silencing effect of the silencing device on the high-frequency sound is ensured, the scheme that the projection of the pipe inlet 2 and the projection of the pipe outlet 3 are completely staggered is excellent, the silencing effect on the high-frequency sound can be maximized, and the silencing frequency range of the silencing device is ensured.
In one embodiment, the inlet end of the expansion chamber 1 is provided with an inlet connecting pipe 4, the outlet end of the expansion chamber 1 is provided with an outlet connecting pipe 5, the connecting pipe comprises an air inlet pipe 6 mounted on the inlet connecting pipe 4, the air inlet pipe 6 comprises an inlet pipe outlet 2, the outlet connecting pipe 5 comprises an outlet pipe inlet 3, and the projection of the inlet pipe outlet 2 and the projection of the outlet pipe inlet 3 on the cross section of the expansion chamber 1 are arranged in a staggered mode.
In the present embodiment, an inlet connection pipe 4 and an outlet connection pipe 5 are respectively disposed at two ends of the expansion chamber 1, wherein the inlet connection pipe 4 is used for mounting and fixing an air inlet pipe 6, and the outlet connection pipe 5 is used for exhausting the expansion chamber 1. The gas inlet pipe 6 comprises an insertion end inserted into the expansion chamber 1, the insertion end is provided with an expansion section 8, and the end surface of the expansion section 8 facing the outlet connecting pipe 5 is provided with a pipe inlet outlet 2. The expansion section 8 can increase the area of the intake pipe 6 at the end of the pipe inlet 2, thereby facilitating the position setting of the pipe inlet 2, facilitating the staggering of the setting position of the pipe inlet 2 and the position of the pipe outlet 3 in the radial direction, avoiding the high-frequency noise from directly discharging the expansion chamber 1 from the pipe inlet 2 through the pipe outlet 3, making the high-frequency noise enter the expansion chamber 1 through the pipe inlet 2, when propagating along the advancing direction, the high-frequency noise can not directly reach the pipe inlet 3, can contact the inner wall of the expansion chamber 1, and reflecting in the expansion chamber 1, thereby discharging from the pipe inlet 3 through the reflection effect after silencing, achieving the purposes of eliminating both low-frequency sound and high-frequency sound, and ensuring that the silencing frequency range of the silencing device can not narrow.
In one embodiment, the piping may also only include the air outlet pipe 7 installed on the outlet connection pipe 5, wherein the inlet connection pipe 4 includes the inlet pipe outlet 2, the air outlet pipe 7 includes the outlet pipe inlet 3, and the projections of the inlet pipe outlet 2 and the outlet pipe inlet 3 on the cross section of the expansion chamber 1 are arranged in a staggered manner.
The expansion chamber 1 comprises an inlet divergent section 11, a straight cylinder section 12 and an outlet convergent section 13 which are arranged in sequence along the gas flow direction, an inlet connecting pipe 4 is connected to the inlet divergent section 11, and an outlet connecting pipe 5 is connected to the outlet convergent section 13. The straight cylinder section 12 is used for effectively eliminating noise, the inlet divergent section 11 is used for connecting the inlet connecting pipe 4, and the outlet convergent section 13 is used for connecting the outlet connecting pipe 5. The inlet connecting pipe 4 is fixedly connected with the inlet gradually-expanding section 11, for example, by welding, and the outlet connecting pipe 5 is fixedly connected with the outlet gradually-reducing section 13, for example, by welding. In this embodiment, the inlet connecting pipe 4 and the inlet diverging section 11 are integrally formed, and the outlet connecting pipe 5 and the outlet converging section 13 are integrally formed.
The gradual expansion form of the inlet gradual expansion section 11 is linear gradual expansion or curve gradual expansion; the tapered form of the outlet tapered section 13 is a straight line taper or a curved line taper. The diverging form of the inlet diverging section 11 and the converging form of the outlet converging section 13 are decided by the skilled person according to production requirements or other specific requirements, generally the inlet diverging section 11 and the outlet converging section 13 are arranged symmetrically on both sides of the sound-deadening chamber. In the present embodiment, the diverging form of the inlet diverging section 11 is a straight diverging form, and the converging form of the outlet converging section 13 is a straight converging form, which are only illustrated, but the inlet diverging section 11 is not limited to a straight diverging form, and the outlet converging section 13 is not limited to a straight converging form.
The expansion section 8 is horn-shaped, a shunt cone 9 is arranged in the expansion section 8, and the inlet pipe outlet 2 is positioned on the annular end face between the shunt cone 9 and the peripheral wall of the expansion section 8.
The inlet connecting pipe 4 and the outlet connecting pipe 5 are both round pipes, the number of the inlet pipe outlets 2 is multiple, the inlet pipe outlets 2 are arranged at intervals along the circumferential direction of the inlet connecting pipe 4, and the projection of the inlet pipe outlets 2 on the cross section of the expansion chamber 1 is positioned on the outer peripheral side of the projection of the outlet connecting pipe 5 on the cross section of the expansion chamber 1.
One end of the air inlet pipe 6 is connected with a pipeline of the air conditioner, the other end of the air inlet pipe is an expansion section 8, and the expansion section 8 is inserted into a silencing cavity of the expansion chamber 1. The expansion section 8 is a hollow semi-closed horn-shaped structure, one end of the horn-shaped structure is semi-closed, namely, a plurality of through holes are formed in the closed horn mouth to serve as the pipe inlet outlet 2, the through holes are uniformly distributed along the circumferential direction of the inlet connecting pipe 4, and the through holes and the pipe outlet inlet 3 are staggered along the radial direction in the length direction of the silencer, so that high-frequency noise is prevented from passing through the silencer, and silencing failure is avoided. In addition, the terminal surface of horn-shaped structure is sunken to the import end of intake pipe 6, form coniform reposition of redundant personnel awl 9, form annular terminal surface between reposition of redundant personnel awl 9 and the expansion section 8, advance a tub export 2 and set up on annular terminal surface, can utilize reposition of redundant personnel awl 9 to prevent that the terminal surface of refrigerant direct impact expansion section 8 from producing the abnormal sound on the one hand, on the other hand can realize effectual reposition of redundant personnel effect, make the refrigerant can flow from the through-hole uniformly, improve flow equalizing effect and noise cancelling effect.
The peripheral wall of the air inlet pipe 6 is provided with an annular limiting bulge 10, and the limiting bulge 10 is stopped outside the inlet connecting pipe 4. The limiting protrusion 10 is used to limit the depth of the air inlet pipe 6 inserted into the expansion chamber 1, so that the depth of the air inlet pipe 6 inserted into the expansion chamber 1 is a preset depth. The structure can ensure the depth of the air inlet pipe 6 inserted into the expansion chamber 1 by presetting the position of the limiting bulge 10, so the structure is simpler, and the installation is quicker and more convenient. The connection relationship between the air inlet pipe 6 and the inlet connecting pipe 4 is splicing, and the air inlet pipe and the inlet connecting pipe are hermetically welded at the splicing position in a brazing mode.
The inlet pipe outlet 2 comprises at least three through holes, the total area of the inlet pipe outlet 2 is equal to the area of the air inlet pipe 6, the noise eliminator can be guaranteed not to influence the normal flow of the refrigerant, and the influence of the noise eliminator on the flow of the refrigerant is reduced.
The air inlet pipe 6 extends into the silencing cavity of the expansion chamber 1 by a preset length.
Wherein the preset length is the length of the air inlet pipe 6 extending into a silencing cavity formed by the straight cylinder section 12.
The length of the straight section 12 is l1A predetermined length of l2，l2＝l1/2, or l2＝l1/4。
The muffler device in the embodiment of the present application can perform silencing according to a specific frequency band by inserting the intake pipe 6 into the silencing cavity of the muffler device extension chamber 1. The specific frequency band is the frequency band that the noise that wants the filtering in the produced sound wave of compressor vibration corresponds, explains in detail below the principle that silencing device in this application can carry out the amortization to specific frequency band.
In this application, the sectional area of the silencing cavity of the silencing device is S1The hollow section area of the air inlet pipe 6 is S2As shown in FIG. 4, the length of the sound-deadening chamber of the extension chamber 1 is l1I.e. the length of the straight cylinder section 12 is l1The length of the air inlet pipe 6 inserted into the expansion chamber 1 is l2Then, the expansion ratio m of the muffler device is:
m＝S1/S 2 1
the formula for calculating the muffling amount of the muffling device is as follows:
wherein k is a wave number,
lambda is the wavelength of sound waves at the gas temperature in the muffler device,
λ＝c/f 4
c is the speed of sound wave propagating in the refrigerant; f is the frequency of the acoustic wave.
As can be seen from equation 2, sin is2kl1The noise cancellation amount has a maximum value at 1, and at this time,
as can be obtained from the formulae 3 and 4,
the frequency at which the muffler device has the maximum muffling volume can thus be obtained:
as shown in equation 5, if the length l of the sound-deadening chamber is set1Increasing, the frequency f of the maximum damping capacity of the damping devicenIt will be lowered. Therefore, the length l of the sound-deadening chamber can be calculated by substituting the frequency of the noise to be eliminated into the formula 51. The noise elimination device with the length of the noise elimination cavity calculated can be used for eliminating noise according to specific frequency.
However, although the above-mentioned muffler device for muffling a specific frequency by calculating the length of the muffling chamber has good muffling performance for the specific frequency, there is a problem of periodic passing frequency, which is specifically given by equation 2:
when kl1When n pi (n is 0,1, 2.), Δ L is 0, i.e., n is n ═ 0, i.e., n ═ 0,1,2. -, nAcoustic device for frequency fn＝nc/2l1The sound waves of (n ═ 0,1, 2..) do not muffle, so that the sound waves of these frequencies are emitted directly without being reduced.
In order to overcome the defect of periodical silencing failure of the silencing device, the method for inserting the air inlet pipe 6 into the silencing cavity is adopted in the application.
FIG. 4 is a schematic view showing the structure of the intake pipe 6 inserted into the sound-deadening chamber, where the intake pipe 6 is inserted with a length l2The length of the anechoic chamber is l1Then, the noise canceling volume at this time is:
wherein:
in the formula, PiRepresenting the incident sound pressure of the muffler device; poRepresenting the sound pressure transmitted by the muffler device; m represents the expansion ratio.
From the equations 7 and 8, the length l of the sound deadening when the intake pipe 6 is inserted is known2＝l1/2，kl1When the frequency of cancellation is (2n +1) pi, (n is 0,1, 2.) Δ L ≠ 0, the muffler device can cancel the frequency fn＝nc/2l1n is an odd sound wave greater than 0, i.e., the odd multiple of the pass frequency of 1/2 wavelength can be eliminated; length l of sound deadening when intake pipe 6 is inserted2＝l1/4，kl1When the frequency of the muffler device is 2n pi, (n is 0,1, 2.) Δ L ≠ 0, the muffler device can cancel the noise at the frequency fn＝nc/2l1n is an even number greater than 0, i.e., an even number of pass frequencies at 1/2 wavelengths can be cancelled.
Thus, the air inlet pipe 6 is inserted into the silencing cavity of the silencer in the application, and the length of the air inlet pipe 6 inserted into the silencing cavity can be 1/2 or 1/4 of the length of the silencing cavity. Therefore, the noise eliminator in this application not only can filter the sound wave of specific frequency, still can pass through intake pipe 6 and periodically leak the frequency elimination to make the noise eliminator in this application can carry out the amortization and have good noise eliminating effect to specific frequency.
In the embodiment of the application, the expansion chamber and the air inlet pipe in the muffler device can be made of iron or red copper, and the skilled person can select the expansion chamber and the air inlet pipe according to specific requirements without special limitation.
In one embodiment, the inlet end of the expansion chamber 1 is provided with an inlet connecting pipe 4, the outlet end of the expansion chamber 1 is provided with an outlet connecting pipe 5, the connecting pipe comprises an air inlet pipe 6 installed on the inlet connecting pipe 4 and an air outlet pipe 7 installed on the outlet connecting pipe 5, the air inlet pipe 6 comprises an inlet pipe outlet 2, the air outlet pipe 7 comprises an outlet pipe inlet 3, and the projection of the inlet pipe outlet 2 and the projection of the outlet pipe inlet 3 on the cross section of the expansion chamber 1 are arranged in a staggered mode.
In this embodiment, two single-tube structures have been adopted and have been combined, wherein the single-tube structure that sets up the entrance point at expansion chamber 1 is taken as intake pipe 6 fixed mounting on the inlet is taken over 4, the single-tube structure that sets up the exit end at expansion chamber 1 is taken over 5 as outlet duct 7 fixed mounting on the export, both are the pipe structure, and the mouth of pipe that intake pipe 6 is located expansion chamber 1 and the mouth of pipe that outlet duct 7 is located expansion chamber 1 form the dislocation along the extending direction of expansion chamber 1 in the radial direction, thereby guarantee that the high-frequency sound can fully reflect the noise elimination in expansion chamber 1, improve the noise elimination effect to the high-frequency sound.
Limiting bulges 10 are respectively arranged on the air inlet pipe 6 and the air outlet pipe 7, the limiting bulges 10 are annular, the length of the air inlet pipe inserted into the expansion chamber 1 is limited when the air inlet pipe 6 is matched with the inlet connecting pipe 4 through the limiting bulges 10 by the air inlet pipe 6, and the length of the air inlet pipe inserted into the expansion chamber 1 is limited when the air outlet pipe 7 is matched with the outlet connecting pipe 5 by the air outlet pipe 7 through the limiting bulges 10. The air inlet pipe 6 and the air outlet pipe 7 are hermetically connected at the inserting position in a brazing mode.
The air inlet pipe 6 is bent for a first preset angle relative to the extending direction of the expansion chamber 1, the air outlet pipe 7 is bent for a second preset angle relative to the extending direction of the expansion chamber 1, and the bending direction of the air inlet pipe 6 is different from that of the air outlet pipe 7.
The bending direction of the air inlet pipe 6 is opposite to that of the air outlet pipe 7.
The first preset angle and the second preset angle are the same, the angle ranges are 15-45 degrees, the pipe inlet outlet 2 and the pipe outlet inlet 3 in the silencing cavity are staggered mutually, high-frequency sound is prevented from passing through the silencing cavity in a centralized mode, and the problem that the sound cannot be silenced through the reflection effect of the silencing cavity is solved.
The air inlet pipe 6 extends into the expansion chamber 1 by a preset length; and/or the air outlet pipe 7 extends into the expansion chamber 1 by a preset length.
Wherein the preset length is the length of the air inlet pipe 6 extending into a silencing cavity formed by the straight cylinder section 12.
The length of the straight section 12 is l1A predetermined length of l2，l2＝l1/2, or l2＝l1/4。
When the air inlet pipe 6 or the air outlet pipe 7 is inserted into 1/2 or 1/4 with the length being equal to that of the sound attenuation cavity, the odd-number multiple passing frequency of 1/2 wavelength or the even-number multiple passing frequency of 1/2 wavelength can be eliminated; or the two are combined, the air inlet pipe 6 is inserted into 1/2 of the length of the sound-deadening cavity, and the air outlet pipe 7 is inserted into 1/4 of the length of the sound-deadening cavity, so that the odd-number times of the passing frequency of 1/2 wavelength can be eliminated, and the even-number times of the passing frequency of 1/2 wavelength can be eliminated.
According to an embodiment of the present application, an air conditioner includes a muffler device, which is the above-described muffler device.
The air inlet pipe 6 of the silencer is connected with a compressor pipeline of an air conditioner in a specific mode: a compressor pipe of the air conditioner is inserted into an intake pipe 6 of the muffler device, and an outer surface of a portion of the compressor pipe inserted into the intake pipe 6 is welded to an inner surface of the intake pipe 6 by brazing.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (16)
1. The utility model provides a muffler device, its characterized in that includes expansion chamber (1) and sets up the piping of the at least one end of expansion chamber (1), the entrance point of expansion chamber (1) has the confession air current and gets into advance tub export (2) of expansion chamber (1), the exit end of expansion chamber (1) has the confession air current and flows out exit tube import (3) of expansion chamber (1), it sets up to advance at least one of tub export (2) and exit tube import (3) on the piping on the cross section of expansion chamber (1), advance the projection of tub export (2) with the projection dislocation set of exit tube import (3).
2. A sound-damping arrangement according to claim 1, characterised in that the inlet end of the expansion chamber (1) has an inlet connection (4) and the outlet end of the expansion chamber (1) has an outlet connection (5), the connection comprising an inlet pipe (6) mounted on the inlet connection (4), the inlet pipe (6) comprising the inlet pipe outlet (2), the outlet connection (5) comprising the outlet pipe inlet (3), the projections of the inlet pipe outlet (2) and the outlet pipe inlet (3) onto the cross-section of the expansion chamber (1) being offset.
3. A sound-damping arrangement according to claim 2, characterised in that the inlet pipe (6) comprises an insertion end which is inserted into the expansion chamber (1), the insertion end having an expansion section (8), the expansion section (8) having the inlet pipe outlet (2) on the end face facing the outlet nipple (5).
4. A muffler device according to claim 3, wherein the inlet pipe (4) and the outlet pipe (5) are both circular pipes, the pipe inlet and outlet (2) are provided in plurality, the plurality of pipe inlet and outlet (2) are arranged at intervals along a circumferential direction of the inlet pipe (4), and a projection of the pipe inlet and outlet (2) onto the cross section of the expansion chamber (1) is located on an outer circumferential side of a projection of the outlet pipe (5) onto the cross section of the expansion chamber (1).
5. A sound-damping arrangement according to claim 3, characterised in that the expansion section (8) is trumpet-shaped, in that a tap cone (9) is arranged in the expansion section (8), and in that the pipe inlet outlet (2) is located on an annular end surface between the tap cone (9) and the peripheral wall of the expansion section (8).
6. A sound-damping arrangement according to claim 2, characterised in that the peripheral wall of the inlet pipe (6) is provided with a stop projection (10), which stop projection (10) stops outside the inlet connection pipe (4).
7. A sound-damping arrangement according to claim 2, characterised in that the total area of the inlet tube outlets (2) is equal to the area of the inlet openings of the inlet tubes (6).
8. A sound-damping arrangement according to claim 1, characterised in that the inlet end of the expansion chamber (1) has an inlet connection (4) and the outlet end of the expansion chamber (1) has an outlet connection (5), the arrangement comprising an inlet pipe (6) mounted on the inlet connection (4) and an outlet pipe (7) mounted on the outlet connection (5), the inlet pipe (6) comprising the inlet pipe outlet (2) and the outlet pipe (7) comprising the outlet pipe inlet (3), the projections of the inlet pipe outlet (2) and the outlet pipe inlet (3) on the cross-section of the expansion chamber (1) being offset.
9. A sound-damping arrangement according to claim 8, characterised in that the inlet pipe (6) is bent at a first predetermined angle relative to the extension of the expansion chamber (1) and the outlet pipe (7) is bent at a second predetermined angle relative to the extension of the expansion chamber (1), the bending direction of the inlet pipe (6) being different from the bending direction of the outlet pipe (7).
10. A sound-damping arrangement according to claim 9, characterised in that the inlet pipe (6) is bent in the opposite direction to the outlet pipe (7).
11. The muffling device of claim 9, wherein the first predetermined angle and the second predetermined angle are the same and both angles range from 15 ° to 45 °.
12. A sound-damping arrangement according to any one of claims 2 to 11, characterised in that the inlet pipe (6) extends a preset length into the sound-damping chamber of the expansion chamber (1).
13. A sound-damping arrangement according to claim 12, characterised in that the expansion chamber (1) comprises, in succession in the direction of the gas flow, an inlet divergent section (11), a straight cylindrical section (12) and an outlet convergent section (13), the inlet connection (4) being connected to the inlet divergent section (11), the outlet connection (5) being connected to the outlet convergent section (13), the sound-damping chamber being the chamber formed by the straight cylindrical section (12).
14. A sound-damping arrangement according to claim 13, characterised in that the length of the straight section (12) is l1The preset length is l2，l2＝l1/2, or l2＝l1/4。
15. A sound-damping arrangement according to any one of claims 8 to 11, characterised in that the outlet duct (7) extends a predetermined length into the sound-damping chamber of the expansion chamber (1).
16. An air conditioner including a muffler, wherein the muffler is as claimed in any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117166.1A CN112785994A (en) | 2021-01-28 | 2021-01-28 | Noise eliminator and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117166.1A CN112785994A (en) | 2021-01-28 | 2021-01-28 | Noise eliminator and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112785994A true CN112785994A (en) | 2021-05-11 |
Family
ID=75759311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110117166.1A Pending CN112785994A (en) | 2021-01-28 | 2021-01-28 | Noise eliminator and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112785994A (en) |
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2021
- 2021-01-28 CN CN202110117166.1A patent/CN112785994A/en active Pending
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