CN109341052B - Silencer for air conditioner and air conditioner - Google Patents
Silencer for air conditioner and air conditioner Download PDFInfo
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- CN109341052B CN109341052B CN201811215615.0A CN201811215615A CN109341052B CN 109341052 B CN109341052 B CN 109341052B CN 201811215615 A CN201811215615 A CN 201811215615A CN 109341052 B CN109341052 B CN 109341052B
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- outer cylinder
- air conditioner
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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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- 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
- F24F2013/242—Sound-absorbing material
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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
- F24F2013/245—Means for preventing or suppressing noise using resonance
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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
- F24F2013/247—Active noise-suppression
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides a silencer for an air conditioner and an air conditioner. Wherein, idle call silencer includes: the outer cylinder is provided with two opposite ports; the inner partition plate is arranged in the outer barrel and divides the outer barrel into two cavities; the air inlet pipe and the air outlet pipe are respectively inserted into two ports of the outer barrel, one of the air inlet pipe and the air outlet pipe is an inner inserting pipe and is inserted into an inserting hole in the inner partition plate, a through hole is formed in the inner inserting pipe, a Helmholtz resonance cavity is defined among the inner inserting pipe, the inner partition plate and the outer barrel, and an expansion cavity is defined among the other one of the air inlet pipe and the air outlet pipe, the inner partition plate and the outer barrel; the interference tube is positioned outside the outer cylinder and is connected to the air inlet pipe and the air outlet pipe positioned outside two ends of the outer cylinder. According to the silencer for the air conditioner, the inner partition plate is arranged in the outer barrel, the interference pipe is additionally arranged on the outer side of the outer barrel, the combined silencing structure of expansion silencing, resonance silencing and interference silencing is designed, the silencing frequency range is increased, and the silencing performance is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a silencer for an air conditioner and an air conditioner comprising the silencer for the air conditioner.
Background
The idle call silencer of now commonly used, its amortization type are single expansion chamber structure mostly, and the noise cancelling effect is relatively poor, and the amortization frequency channel is narrower, can not reach good noise elimination noise reduction effect, influences user experience effect.
Some mufflers with composite muffling are proposed in the related art, for example, two independent muffling cavities are connected in series to achieve the purpose of widening a muffling frequency band, but the muffling device has a complex structure and high manufacturing cost, and the mufflers are long in length and cannot integrate muffling effect and piping spatial layout.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, an object of one aspect of the present invention is to provide a muffler for an air conditioner.
Another object of the present invention is to provide an air conditioner including the muffler for an air conditioner.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a muffler for an air conditioner, comprising: the outer barrel is provided with two oppositely arranged ports; the inner partition plate is arranged in the outer barrel and divides the outer barrel into two cavities, and insertion holes are formed in the inner partition plate; an air inlet pipe and an air outlet pipe which are respectively inserted into two ports of the outer cylinder, wherein one of the air inlet pipe and the air outlet pipe is an inner insertion pipe, one end of the inner insertion pipe is inserted into the insertion hole through one cavity, a through hole is formed in a pipe body of the inner insertion pipe positioned in the cavity, a helmholtz resonance cavity is defined among the inner insertion pipe, the inner partition plate and the inner wall of the outer cylinder, an expansion cavity is defined among the other one of the air inlet pipe and the air outlet pipe, the inner partition plate and the inner wall of the outer cylinder, a first connecting hole is formed in a pipe body of the air inlet pipe positioned outside the outer cylinder, and a second connecting hole is formed in a pipe body of the air outlet pipe positioned outside the outer; and the interference pipe is positioned outside the outer barrel, one end of the interference pipe is connected with the first connecting hole, and the other end of the interference pipe is connected with the second connecting hole.
According to the silencer for the air conditioner, provided by the technical scheme, aiming at wide-frequency-band noise generated in an air conditioner outdoor unit, a combined silencing structure of expansion silencing, Helmholtz resonance silencing and interference silencing is designed, so that the silencing frequency band can be increased, the silencing performance can be improved, and the noise can be improved; specifically, a part of airflow enters the outer cylinder through the air inlet pipe, and for the scheme that the air outlet pipe is an inner inserting pipe, the airflow firstly enters the expansion cavity through the pipe orifice at one end of the air inlet pipe, then enters the resonance cavity through the through hole on the air outlet pipe, and then flows out through the air outlet pipe, and for the scheme that the air inlet pipe is an inner inserting pipe, the airflow firstly enters the Helmholtz resonance cavity through the through hole on the air inlet pipe, then enters the expansion cavity through the pipe orifice at one end of the air inlet pipe, and then flows out through the air outlet pipe, because the pipe diameters of the air inlet pipe and the air outlet pipe are both small, when the airflow flows through the expansion cavity, the cross section of the airflow expands and contracts to generate mismatching, so that noise sound waves generated by the airflow are reflected and interfered at an interface with abrupt acoustic impedance; when the air flow enters the Helmholtz resonance cavity, Helmholtz resonance and resonance silencing can be generated when the natural frequency of the resonance cavity structure is the same as that of the noise sound wave generated by the air flow, so that the natural frequency of the Helmholtz resonance cavity can be adjusted by reasonably designing the resonance cavity structure, the noise of a certain frequency section, such as high-frequency noise, which cannot be eliminated by the expansion cavity can be eliminated, and the aim of widening the silencing frequency band is fulfilled by combining the silencing frequency section of the expansion silencing; the other part of the airflow passes through the interference pipe from the first connecting hole on the air inlet pipe, then passes through the second connecting hole on the air outlet pipe, and is converged with the airflow flowing out of the air outlet pipe after expansion noise elimination and Helmholtz resonance noise elimination, and the length of the interference pipe is reasonably designed, so that two rows of sound waves transmitted through two paths in the outer cylinder and the outer cylinder generate an interference phenomenon at the outlet of the air outlet pipe after being transmitted for different distances through the two paths, if the amplitudes of the two rows of sound waves are the same, the two rows of sound waves are mutually offset in a space area with the phase difference being odd times of pi, namely, wave crests are reduced after the sound waves with opposite phases are superposed, the noise is reduced, and therefore, the noise elimination frequency band can be further; the structure equivalently comprises three-level noise elimination, and the noise elimination frequency band can be effectively widened by combining Helmholtz resonance noise elimination, expansion noise elimination and interference noise elimination, so that the noise elimination performance is improved, the purpose of reducing noise is achieved, and the user experience effect is improved.
In addition, the inner baffle is arranged in the outer cylinder to divide the outer cylinder into two cavities, for example, the inner baffle is arranged in the outer cylinder firstly when the outer cylinder is subjected to necking processing, then the outer cylinder is subjected to necking processing, so that the space in the outer cylinder is divided into two cavities after the outer cylinder is subjected to necking processing, the structure of the silencer for the air conditioner is simplified, the processing is convenient, the manufacturing cost is low, the primary silencer is changed into a tertiary silencer by adding the inner baffle in the outer cylinder and adding an interference pipe outside the outer cylinder under the condition of not changing the size of the outer cylinder of the existing silencer or slightly increasing the size of the outer cylinder of the silencer, the comprehensive silencing effect and the spatial layout of the piping are facilitated, the installation of the silencer for the air conditioner in an air conditioning pipeline is facilitated, and compared with the existing scheme of connecting two independent silencing cavities in series, this scheme can avoid the idle call silencer to lead to silencer length overlength, the inconvenient problem of installation in the air conditioner pipeline for promoting noise elimination effect.
In addition, the muffler for an air conditioner provided by the technical scheme of the invention can also have the following additional technical characteristics:
in the above technical solution, preferably, the number of the through holes is one or two.
The number of the through holes is preferably one to two, so that good tightness of a Helmholtz resonance cavity formed by the inner inserting pipe, the inner partition board inserting hole, the inner partition board and the inner surface of the outer cylinder is ensured, and the noise elimination effect of the Helmholtz resonance cavity can be improved.
In the above technical solution, preferably, a resonance tube is connected to the through hole, and the resonance tube is entirely located in the helmholtz resonance cavity.
The through hole on the inner insertion pipe is connected with the resonance pipe, and the specific frequency can be designed by adjusting the length of the resonance pipe, so that expansion noise elimination and interference noise elimination are combined, the noise of a wider frequency band is eliminated, and the purpose of reducing or eliminating the noise is achieved; optionally, the resonance tube is inserted into the through hole and is welded and fixed with the inner insertion tube, processing is convenient, and connection is firm.
In the above technical solution, preferably, two ports of the outer cylinder are an air inlet and an air outlet, respectively, the air outlet pipe is the inner insertion pipe, one end of the inner insertion pipe is inserted into the air outlet and the insertion hole and is welded and fixed to the outer cylinder, and one end of the air inlet pipe is inserted into the air inlet and is welded and fixed to the outer cylinder.
According to the scheme, the air inlet pipe, the inner partition plate and the inner wall of the outer barrel form an expansion cavity together for expansion and noise reduction; the air outlet pipe, the inner baffle and the inner wall of the outer cylinder form a Helmholtz resonance cavity together for resonance and noise reduction; specifically, part of the airflow enters an expansion cavity of the silencer through an air inlet pipe, noise is reduced through acoustic reactance, and expansion and noise reduction are realized; the expanded and muffled air flow enters the Helmholtz resonance cavity through the through hole on the air outlet pipe (or through the resonance pipe connected to the through hole), Helmholtz resonance is generated, and the noise is reduced; part of the airflow passes through the interference tube from the first connecting hole on the air inlet tube and then passes through the second connecting hole on the air outlet tube to be converged with the airflow flowing out of the air outlet tube after expansion noise elimination and resonance noise elimination, and the wave peak is reduced and the noise is reduced after the sound waves with opposite phases are superposed; the structure is equivalent to a three-level silencer, and the expansion silencing, the Helmholtz resonance silencing and the interference silencing are combined, so that the silencing frequency band can be effectively widened, the silencing performance is improved, and the purpose of reducing the noise is achieved.
In the above technical solution, preferably, two ports of the outer cylinder are an air inlet and an air outlet, respectively, the air inlet pipe is the inner insertion pipe, one end of the inner insertion pipe is inserted into the air inlet and the insertion hole and is welded and fixed to the outer cylinder, and one end of the air outlet pipe is inserted into the air outlet and is welded and fixed to the outer cylinder.
In the scheme, the air inlet pipe, the inner partition plate and the inner wall of the outer cylinder form a Helmholtz resonance cavity together to perform resonance and noise reduction; the air outlet pipe, the inner partition plate and the inner wall of the outer barrel form an expansion cavity together for expansion and noise reduction; specifically, part of airflow enters a Helmholtz resonance cavity of the silencer through an air inlet pipe, Helmholtz resonance is generated, and noise is reduced; the air flow after resonance and noise reduction enters an expansion cavity, noise is reduced through acoustic reactance, and expansion and noise reduction are realized; part of the airflow passes through the interference tube from the first connecting hole on the air inlet tube and then passes through the second connecting hole on the air outlet tube to be converged with the airflow flowing out of the air outlet tube after resonance noise elimination and expansion noise elimination, and the wave peak is reduced and the noise is reduced after the sound waves with opposite phases are superposed; the structure is equivalent to a three-level silencer, and the combined damping of Helmholtz resonance, expansion and interference can effectively widen the damping frequency band, improve the damping performance and achieve the purpose of reducing noise.
In the above technical solution, preferably, the one end of the interference tube is inserted into the first connection hole and is welded and fixed to the air inlet tube, and the other end of the interference tube is inserted into the second connection hole and is welded and fixed to the air outlet tube.
The connection mode of the interference tube and the air inlet tube and the connection mode of the interference tube and the air outlet tube are convenient to process and firm in connection.
In the above technical solution, preferably, the length L2 of the interference tube satisfies: l2 ═ L1+ c × n/2f, where n is an integer, c is the medium sound velocity, f is the sound attenuation frequency, and L1 is the distance between the center point of the first connection hole and the center point of the second connection hole.
According to the scheme, the silencing frequency section can be well adjusted by reasonably designing the values of L2 and L1, so that the effects of widening the silencing frequency range and improving the silencing performance are achieved by combining expansion silencing and resonance silencing; it should be noted that L1 is also the span length of the interference tube.
In any one of the above technical solutions, preferably, the outer cylinder includes a cylindrical section in the middle, two end necking sections, and a transition section connected between the cylindrical section and the necking sections, and the air inlet pipe is fixed to one of the necking sections, and the air outlet pipe is fixed to the other necking section.
According to the scheme, the two ends of the outer cylinder are necked, and the outer cylinder is processed by adopting a necking process, so that the outer cylinder is convenient to process and high in structural strength; specifically, when the outer barrel is subjected to necking processing, the inner partition plate can be arranged in the outer barrel, and then the outer barrel is subjected to necking processing, so that the space in the outer barrel is divided into two cavities after the outer barrel is subjected to necking processing; two necking sections of the outer barrel are respectively welded and fixed with the air inlet pipe and the air outlet pipe, so that the outer barrel is firmly connected with the air inlet pipe and the outer barrel is firmly connected with the air outlet pipe.
In the above technical solution, preferably, the outer diameter of the cylindrical section in the middle of the outer cylinder is in the range of 40mm to 60mm, and the length of the outer cylinder is in the range of 100mm to 140 mm.
Above-mentioned scheme, through rational design urceolus size, be favorable to synthesizing noise cancelling effect and piping spatial layout, has also both ensured above-mentioned idle call silencer and has good noise cancelling and noise reduction effect promptly, is convenient for again the installation of above-mentioned idle call silencer in the air conditioner pipeline.
In the above technical solution, preferably, the length of the expansion cavity is in a range of 50mm to 70mm, and the length of the helmholtz resonance cavity is in a range of 50mm to 70 mm.
According to the scheme, the lengths of the expansion cavity and the Helmholtz resonance cavity are reasonably designed, so that the expansion cavity and the Helmholtz resonance cavity respectively eliminate noises in different frequency bands, interference noise elimination is combined, the noise elimination frequency band of the whole silencer is increased, the noise elimination performance is improved, and the purpose of reducing the noise is achieved; of course, the lengths of the expansion cavity and the helmholtz resonance cavity are not limited to the above specific limitations.
In the above technical solution, preferably, a distance L1 between a center point of the first connection hole and a center point of the second connection hole is in a range of 110mm to 150 mm.
Above-mentioned scheme, the span length that also designs the interference pipe is at 110mm ~ 150mm to ensure that the interference union coupling is on being located the outside intake pipe of urceolus and outlet duct, ensure that the connection of interference pipe is more convenient.
The technical scheme of the second aspect of the invention provides an air conditioner, which comprises the silencer for the air conditioner according to any one of the technical schemes.
The air conditioner provided by the technical scheme of the invention has the beneficial effects of the air conditioner silencer in any technical scheme because the air conditioner silencer comprises the air conditioner silencer in any technical scheme.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic front view of a muffler for an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;
fig. 3 is a schematic view showing the flow direction of the air current in the muffler for air conditioning shown in fig. 2.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
the structure comprises an outer cylinder 1, an inner partition plate 2, an insertion hole 21, an air inlet pipe 3, a first connecting hole 31, an air outlet pipe 4, a second connecting hole 41, a through hole 42, an interference pipe 5 and a resonance pipe 6;
the arrows in fig. 3 indicate the airflow direction.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A muffler for an air conditioner and an air conditioner according to some embodiments of the present invention will be described below with reference to fig. 1 to 3.
As shown in fig. 1 to 3, a muffler for an air conditioner according to some embodiments of the present invention includes: the device comprises an outer cylinder 1, an inner partition plate 2, an air inlet pipe 3, an air outlet pipe 4 and an interference pipe 5.
Specifically, the outer cylinder 1 has two ports disposed oppositely; the inner partition plate 2 is arranged in the outer barrel 1 and divides the outer barrel 1 into two cavities, and the inner partition plate 2 is provided with insertion holes 21; an air inlet pipe 3 and an air outlet pipe 4 are respectively inserted into two ports of the outer barrel 1, one of the air inlet pipe 3 and the air outlet pipe 4 is an inner insertion pipe, one end of the inner insertion pipe is inserted into the insertion hole 21 through a cavity, a through hole 42 is formed in a pipe body of the inner insertion pipe positioned in the cavity, a Helmholtz resonance cavity b is defined between the inner insertion pipe, the inner baffle 2 and the inner wall of the outer barrel 1, an expansion cavity a is defined between the other one of the air inlet pipe 3 and the air outlet pipe 4, the inner baffle 2 and the inner wall of the outer barrel 1, a first connecting hole 31 is formed in a pipe body of the air inlet pipe 3 positioned outside the outer barrel 1, and a second connecting hole; the interference pipe 5 is located outside the outer cylinder 1, and one end of the interference pipe 5 is connected at the first connection hole 31 and the other end is connected at the second connection hole 41.
As shown in fig. 2 and 3, a in the drawings indicates an expansion chamber, and b indicates a helmholtz resonance chamber.
According to the silencer for the air conditioner, provided by the embodiment of the invention, aiming at wide-frequency-band noise generated in an air conditioner outdoor unit, a combined silencing structure of expansion silencing, Helmholtz resonance silencing and interference silencing is designed, so that the silencing frequency band can be increased, the silencing performance can be improved, and the noise can be improved; specifically, the silencer outer cylinder 1 is divided into two cavities by the inner partition plate 2, one of the air inlet pipe 3 and the air outlet pipe 4 is designed to be an inner insertion pipe, the inner insertion pipe is inserted into the insertion hole 21 in the inner partition plate 2, the inner insertion pipe, the inner partition plate 2 and the inner wall of the outer cylinder 1 jointly form a Helmholtz resonance cavity b, partial air flow enters the Helmholtz resonance cavity b through a through hole 42 in the inner insertion pipe, Helmholtz resonance and resonance silencing are generated when the noise sound wave generated by the air flow is the same as the natural frequency of the resonance cavity structure, and therefore the natural frequency of the Helmholtz resonance cavity b is adjusted by reasonably designing the resonance cavity structure, and the purposes of eliminating noise of a certain frequency section and reducing noise by the Helmholtz resonance cavity b are achieved; the other one of the air inlet pipe 3 and the air outlet pipe 4, the inner partition plate 2 and the inner wall of the outer cylinder 1 form an expansion cavity a together, air flow enters the expansion cavity a with a larger sectional area from the air inlet pipe 3 with a smaller pipe diameter and then flows out from the air outlet pipe 4 with a smaller pipe diameter, the cross section is expanded and contracted, acoustic impedance mismatch is generated, noise sound waves generated by the air flow are reflected and interfered at an interface with abrupt acoustic impedance change, the sound waves at middle and low frequencies are mutually counteracted, namely, the noise is reduced through acoustic impedance, the noise is expanded and silenced, and the middle and low frequency noise can be reduced; the other part of the airflow passes through the interference pipe 5 from the first connecting hole 31 on the air inlet pipe 3 and then joins the airflow flowing out of the air outlet pipe 4 after the expansion noise elimination and the helmholtz resonance noise elimination through the second connecting hole 41 on the air outlet pipe 4, and by reasonably designing the length of the interference pipe 5, two rows of sound waves propagated through two paths inside the outer cylinder 1 and outside the outer cylinder 1 generate an interference phenomenon at the outlet of the air outlet pipe 4 after being propagated for different distances through the two paths, if the amplitudes of the two rows of sound waves are the same, the two rows of sound waves are mutually offset in a space area with the phase difference being odd times of pi, namely, the wave crests are reduced after the sound waves with opposite phases are superposed, and the noise is reduced, so that the noise elimination frequency range can be further widened and the noise is; the structure equivalently comprises three-level noise elimination, and the noise elimination frequency band can be effectively widened by combining Helmholtz resonance noise elimination, expansion noise elimination and interference noise elimination, so that the noise elimination performance is improved, the purpose of reducing noise is achieved, and the user experience effect is improved.
In addition, the outer cylinder 1 is divided into two cavities by the inner partition board 2 built in the outer cylinder 1, for example, the inner partition board 2 is firstly placed in the outer cylinder when the outer cylinder 1 is processed by necking, then the outer cylinder 1 is processed by necking, so that the space in the outer cylinder 1 is divided into two cavities after the outer cylinder 1 is processed by necking, thereby not only simplifying the structure of the whole silencer for air conditioner, being convenient to process and having low manufacturing cost, but also changing the primary silencer into a tertiary silencer by adding the inner partition board 2 in the outer cylinder 1 and adding the interference pipe 5 outside the outer cylinder 1 under the condition of not changing the size of the existing silencer outer cylinder 1 or slightly increasing the size of the silencer outer cylinder 1, thereby being beneficial to the comprehensive silencing effect and the spatial layout of the piping and being convenient for the installation of the silencer for air conditioner in the air conditioning pipeline, compare in the current scheme of concatenating two independent noise elimination cavities, this scheme can avoid idle call silencer for promoting the noise elimination effect and lead to silencer length overlength, the inconvenient problem of installation in the air conditioner pipeline.
Preferably, as shown in fig. 1 to 3, the two ends of the outer cylinder 1 are necked, that is, the outer cylinder 1 is formed by a necking process, specifically, when the outer cylinder 1 is necked, the inner partition plate 2 may be placed in the outer cylinder 1 first, and then the outer cylinder 1 is necked, so that the space in the outer cylinder 1 is divided into two cavities after the outer cylinder 1 is necked.
Preferably, the number of the through holes 42 is one or two, so that the good tightness of the helmholtz resonance cavity b formed by the inner inserting tube, the inner inserting hole 21 of the inner partition plate 2, the inner partition plate 2 and the inner surface of the outer cylinder 1 is ensured, and the noise elimination effect of the helmholtz resonance cavity b can be improved; as shown in fig. 2 and 3, the number of the through holes 42 is one.
Optionally, as shown in fig. 2 and 3, the through hole 42 is connected with the resonance tube 6, the resonance tube 6 is entirely located in the helmholtz resonance cavity b, and a specific frequency can be designed by adjusting the length of the resonance tube 6, so that expansion noise elimination and interference noise elimination are combined, noise in a wider frequency band is eliminated, and the purpose of reducing or eliminating noise is achieved; alternatively, the resonance tube 6 is inserted into the through hole 42 and welded to the inner insert tube, and the processing is convenient and the connection is firm.
Optionally, as shown in fig. 2 and 3, the resonance tube 6 is a bent tube connected to the through hole 42, and is mainly limited by the space of the helmholtz resonance cavity b, so that when the volume of the helmholtz resonance cavity b is small, the length of the resonance tube 6 is reasonably adjusted by designing the resonance tube 6 into the bent tube, and a specific frequency is designed, so that the noise of a wider frequency band is eliminated by combining expansion noise elimination and interference noise elimination, and the purpose of reducing or eliminating the noise is achieved; preferably, the resonance tube 6 is bent in the flow direction of the airflow in the inner cannula. Of course, the resonance tube 6 may be designed as a straight tube without being limited by the space of the helmholtz resonance cavity b; the specific design length of the resonance tube 6 may be designed reasonably according to actual conditions, and is not particularly limited herein.
Example one
As shown in fig. 2 and 3, two ports of the outer cylinder 1 are an air inlet and an air outlet respectively, the air outlet pipe 4 is an inner insertion pipe, one end of the inner insertion pipe is inserted into the air outlet and the insertion hole 21 and is welded and fixed with the outer cylinder 1, and one end of the air inlet pipe 3 is inserted into the air inlet and is welded and fixed with the outer cylinder 1.
In the embodiment, the air inlet pipe 3, the inner partition plate 2 and the inner wall of the outer cylinder 1 form an expansion cavity a together for expansion and noise reduction; the air outlet pipe 4, the inner baffle 2 and the inner wall of the outer cylinder 1 form a Helmholtz resonance cavity b together for resonance and noise reduction; specifically, part of the airflow enters an expansion cavity a of the silencer through an air inlet pipe 3, noise is reduced through acoustic reactance, and expansion and noise reduction are realized; the expanded and muffled air flow enters a Helmholtz resonance cavity b through a through hole 42 on the air outlet pipe 4 (or through a resonance pipe 6 connected to the through hole 42), Helmholtz resonance is generated, and the noise is reduced; part of the airflow passes through the interference tube 5 from the first connecting hole 31 on the air inlet tube 3 and then passes through the second connecting hole 41 on the air outlet tube 4 to be converged with the airflow flowing out of the air outlet tube 4 after expansion noise elimination and resonance noise elimination, the wave peak is reduced after the sound waves with opposite phases are superposed, and the noise is reduced; the structure is equivalent to a three-level silencer, and the expansion silencing, the Helmholtz resonance silencing and the interference silencing are combined, so that the silencing frequency band can be effectively widened, the silencing performance is improved, and the purpose of reducing the noise is achieved.
Example two:
two ports of the outer cylinder 1 are respectively an air inlet and an air outlet, the air inlet pipe 3 is an inner insertion pipe, one end of the inner insertion pipe is inserted into the air inlet and the insertion hole 21 and is welded and fixed with the outer cylinder 1, and one end of the air outlet pipe 4 is inserted into the air outlet and is welded and fixed with the outer cylinder 1.
In the embodiment, the air inlet pipe 3, the inner baffle 2 and the inner wall of the outer cylinder 1 form a Helmholtz resonance cavity b together to perform resonance and noise reduction; the air outlet pipe 4, the inner partition plate 2 and the inner wall of the outer barrel 1 form an expansion cavity a together for expansion and noise reduction; specifically, part of the air flow enters a Helmholtz resonance cavity b of the silencer through the air inlet pipe 3, Helmholtz resonance is generated, and noise is reduced; the air flow after resonance and noise reduction enters an expansion cavity a, the noise is reduced through acoustic reactance, and the air flow is expanded and noise reduced; part of the airflow passes through the interference tube 5 from the first connecting hole 31 on the air inlet tube 3 and then passes through the second connecting hole 41 on the air outlet tube 4 to be converged with the airflow flowing out of the air outlet tube 4 after resonance noise elimination and expansion noise elimination, the wave peak is reduced after the sound waves with opposite phases are superposed, and the noise is reduced; the structure is equivalent to a three-level silencer, and the combined damping of Helmholtz resonance, expansion and interference can effectively widen the damping frequency band, improve the damping performance and achieve the purpose of reducing noise.
In any of the above embodiments, preferably, as shown in fig. 1 to 3, one end of the interference tube 5 is inserted into the first connection hole 31 and is welded and fixed to the inlet tube 3, and the other end of the interference tube 5 is inserted into the second connection hole 41 and is welded and fixed to the outlet tube 4, and the interference tube 5 and the inlet tube 3, and the interference tube 5 and the outlet tube 4 are connected in a manner that is convenient to process and firm in connection.
Alternatively, as shown in fig. 1, the air inlet pipe 3 and the air outlet pipe 4 are located on the same axis, and the interference pipe 5 includes a straight pipe section disposed parallel to the air inlet pipe 3, and two connection pipe sections connected to both ends of the straight pipe section, respectively, one of the connection pipe sections is connected to the first connection hole 31, and the other connection pipe section is connected to the second connection hole 41, so as to ensure smooth flow of the air flow in the interference pipe 5, thereby ensuring interference noise elimination effect of the interference pipe 5.
Preferably, the length L2 of the interference tube 5 satisfies: l2 is L1+ c × n/2f, where n is an integer, c is the medium sound velocity, f is the sound attenuation frequency, and L1 is the distance between the center point of the first connection hole 31 and the center point of the second connection hole 41, as shown in fig. 1, and L1 in the figure indicates the distance between the center point of the first connection hole 31 and the center point of the second connection hole 41.
The silencing frequency section can be well adjusted by reasonably designing the values of L2 and L1, so that the effects of widening the silencing frequency band and improving the silencing performance are achieved by combining expansion silencing and resonance silencing; it should be noted that L1 is also the span length of the interference tube 5.
In any of the above embodiments, preferably, as shown in fig. 1, the outer cylinder 1 includes a cylindrical section in the middle, two end necking sections, and a transition section connected between the cylindrical section and the necking sections, the air inlet pipe 3 is fixed to one of the necking sections, and the air outlet pipe 4 is fixed to the other necking section, and the outer cylinder 1 is processed by a necking process, so that the outer cylinder 1 is convenient to process and has high structural strength.
Preferably, the outer diameter of the cylindrical section in the middle of the outer cylinder 1 is in the range of 40mm to 60mm, and the length of the outer cylinder 1 is in the range of 100mm to 140mm, as shown in fig. 1, wherein D represents the outer diameter of the cylindrical section in the middle of the outer cylinder 1, and L represents the length of the outer cylinder 1.
Through reasonable design 1 size of urceolus, be favorable to synthesizing noise elimination effect and piping spatial layout, promptly both ensure above-mentioned idle call silencer and have good noise elimination noise reduction effect, be convenient for again the installation of above-mentioned idle call silencer in the air conditioner pipeline. Of course, the wall thickness of the outer cylinder 1 is thin, and the wall thickness of the outer cylinder 1 can be ignored here.
Preferably, the length of the expansion cavity a is in the range of 50mm to 70mm, and the length of the helmholtz resonance cavity b is in the range of 50mm to 70 mm.
The lengths of the expansion cavity a and the Helmholtz resonance cavity b are reasonably designed, so that the expansion cavity a and the Helmholtz resonance cavity b respectively eliminate noises in different frequency bands, interference noise elimination is combined, the noise elimination frequency band of the whole silencer is increased, the noise elimination performance is improved, and the purpose of reducing the noise is achieved; of course, the lengths of the expansion cavity a and the helmholtz resonance cavity b are not limited to the above specific limitations.
Preferably, as shown in fig. 1, a distance L1 between the center point of the first connection hole 31 and the center point of the second connection hole 41 is in the range of 110mm to 150 mm.
That is, the span length of the interference tube 5 is designed to be 110 mm-150 mm, so as to ensure that the interference tube 5 is connected to the air inlet tube 3 and the air outlet tube 4 which are positioned outside the outer cylinder 1, and ensure that the connection of the interference tube 5 is more convenient.
In any of the above embodiments, preferably, the outer cylinder 1 is made of stainless steel.
The silencer outer cylinder 1 is preferably made of stainless steel materials such as SUS439, and the price is lower than that of copper materials, so that the manufacturing cost is reduced; of course, the outer cylinder 1 of the silencer can also be made of other materials such as copper materials.
In one specific embodiment, the silencer for the air conditioner comprises an outer cylinder 1, an air inlet pipe 3, an air outlet pipe 4, an inner partition plate 2, an interference pipe 5 and a resonance pipe 6, wherein the two ends of the outer cylinder 1 are necked, and the air inlet pipe and the air outlet pipe are inserted into the outer cylinder 1 and are welded with the outer cylinder 1; an expansion cavity a is formed among the air inlet pipe 3, the inner partition plate 2 and the outer cylinder 1; the air outlet pipe 4 is inserted into a middle hole (namely an inserting hole 21) of the inner baffle plate 2, and a Helmholtz resonance cavity b is formed among the air outlet pipe 4, the inner baffle plate 2 and the outer cylinder 1; a small hole (namely a through hole 42) is formed in the air outlet pipe 4, and the resonance pipe 6 is inserted into the hole and is welded with the air outlet pipe 4; the air inlet pipe and the air outlet pipe extend out of the outer cylinder 1, both the air inlet pipe and the air outlet pipe extending out of the outer cylinder 1 are provided with holes (namely a first connecting hole 31 and a second connecting hole 41), and the interference pipe 5 is inserted into the holes and welded with the air inlet pipe and the air outlet pipe; specifically, as the arrows in fig. 3 indicate the flow direction of the air flow, part of the air flow enters the expansion cavity a through the air inlet pipe 3, and the expansion eliminates the noise; then part of the air flow passes through a small hole on the air outlet pipe 4 and enters the Helmholtz resonance cavity b through the resonance pipe 6 to perform resonance and noise elimination; part of the airflow passes through the hole (namely the first connecting hole 31) at the end of the air inlet pipe 3, passes through the interference pipe 5, and then passes through the second connecting hole 41 on the air outlet pipe 4 to be converged with the airflow at the end of the air outlet pipe 4 after expansion noise elimination and resonance noise elimination, so that the wave peak is reduced and the noise is reduced after the sound waves with opposite phases are superposed; the structure comprises three-level noise elimination, and expansion noise elimination, Helmholtz resonance noise elimination and interference noise elimination are combined, so that the noise elimination frequency band can be effectively widened, and the noise elimination performance is improved.
An embodiment of a second aspect of the present invention provides an air conditioner including the muffler for an air conditioner as in any one of the above embodiments.
The air conditioner provided by the above embodiment of the present invention includes the muffler for an air conditioner of any one of the above embodiments, and therefore, the air conditioner has the beneficial effects of the muffler for an air conditioner of any one of the above embodiments, and details are not repeated herein.
In summary, according to the silencer for the air conditioner, provided by the invention, aiming at wide-frequency-band noise generated in an air conditioner outdoor unit, the inner partition plate is arranged in the outer cylinder, the interference pipe is additionally arranged outside the outer cylinder, and the combined silencing structure of expansion silencing, helmholtz resonance silencing and interference silencing is designed, so that the silencing frequency band can be increased, and the silencing performance can be improved; and the structure is simplified, the manufacturing cost is low, and the comprehensive noise elimination effect and the piping space layout are facilitated.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a detachable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A muffler for an air conditioner, comprising: the outer barrel is provided with two oppositely arranged ports; the inner partition plate is arranged in the outer barrel and divides the outer barrel into two cavities, and insertion holes are formed in the inner partition plate; an air inlet pipe and an air outlet pipe which are respectively inserted into two ports of the outer cylinder, wherein one of the air inlet pipe and the air outlet pipe is an inner insertion pipe, one end of the inner insertion pipe is inserted into the insertion hole through a cavity, and the inner insertion pipe is characterized in that,
a through hole is formed in the pipe body of the inner inserting pipe positioned in the cavity, a Helmholtz resonance cavity is defined among the inner inserting pipe, the inner baffle and the inner wall of the outer barrel, an expansion cavity is defined among the other one of the air inlet pipe and the air outlet pipe, the inner baffle and the inner wall of the outer barrel, a first connecting hole is formed in the pipe body of the air inlet pipe positioned outside the outer barrel, and a second connecting hole is formed in the pipe body of the air outlet pipe positioned outside the outer barrel;
the muffler for an air conditioner further includes: and the interference pipe is positioned outside the outer barrel, one end of the interference pipe is connected with the first connecting hole, and the other end of the interference pipe is connected with the second connecting hole.
2. The muffler for an air conditioner according to claim 1,
the number of the through holes is one or two.
3. The muffler for an air conditioner according to claim 1,
and the through hole is connected with a resonance tube, and the whole resonance tube is positioned in the Helmholtz resonance cavity.
4. The muffler for an air conditioner according to claim 1,
the two ports of the outer cylinder are respectively an air inlet and an air outlet, the air outlet pipe is the inner inserting pipe, one end of the inner inserting pipe is inserted into the air outlet and the inserting hole and is welded and fixed with the outer cylinder, and one end of the air inlet pipe is inserted into the air inlet and is welded and fixed with the outer cylinder.
5. The muffler for an air conditioner according to claim 1,
the two ports of the outer cylinder are respectively an air inlet and an air outlet, the air inlet pipe is the inner insertion pipe, one end of the inner insertion pipe is inserted into the air inlet and the insertion hole and is welded and fixed with the outer cylinder, and one end of the air outlet pipe is inserted into the air outlet and is welded and fixed with the outer cylinder.
6. The muffler for an air conditioner according to claim 1,
the one end of interfering the pipe insert first connecting hole, and with intake pipe welded fastening, interfere the pipe the other end insert the second connecting hole, and with outlet duct welded fastening.
7. The muffler for an air conditioner according to claim 1,
the length L2 of the interference tube satisfies: l2 ═ L1+ c × n/2f, where n is an integer, c is the medium sound velocity, f is the sound attenuation frequency, and L1 is the distance between the center point of the first connection hole and the center point of the second connection hole.
8. The muffler for an air conditioner according to any one of claims 1 to 7,
the outer barrel comprises a cylindrical section in the middle, necking sections at two ends and a transition section connected between the cylindrical section and the necking sections, the air inlet pipe is fixed with one of the necking sections, and the air outlet pipe is fixed with the other necking section.
9. The muffler for an air conditioner according to claim 8,
the outer diameter of the cylindrical section in the middle of the outer cylinder is within the range of 40 mm-60 mm, and the length of the outer cylinder is within the range of 100 mm-140 mm.
10. The muffler for an air conditioner according to claim 9,
the length of the expansion cavity is within the range of 50 mm-70 mm, and the length of the Helmholtz resonance cavity is within the range of 50 mm-70 mm.
11. The muffler for an air conditioner according to claim 9,
the distance L1 between the center point of the first connection hole and the center point of the second connection hole is in the range of 110 mm-150 mm.
12. An air conditioner characterized by comprising the muffler for an air conditioner as set forth in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215615.0A CN109341052B (en) | 2018-10-18 | 2018-10-18 | Silencer for air conditioner and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215615.0A CN109341052B (en) | 2018-10-18 | 2018-10-18 | Silencer for air conditioner and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109341052A CN109341052A (en) | 2019-02-15 |
| CN109341052B true CN109341052B (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811215615.0A Active CN109341052B (en) | 2018-10-18 | 2018-10-18 | Silencer for air conditioner and air conditioner |
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| CN (1) | CN109341052B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771593A (en) * | 2021-09-27 | 2021-12-10 | 重庆建设车用空调器有限责任公司 | Multi-stage noise elimination structure of rotary vane type compressor shell of air conditioner for vehicle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50136804U (en) * | 1974-04-26 | 1975-11-11 | ||
| JP2000320319A (en) * | 1999-05-11 | 2000-11-21 | Kojima Press Co Ltd | Muffler |
| JP2002327612A (en) * | 2001-04-27 | 2002-11-15 | Shintaro Yamada | Noise suppressor |
| US7497300B2 (en) * | 2004-03-18 | 2009-03-03 | D Angelo John P | Noise reduction tubes |
| CN202254196U (en) * | 2011-07-27 | 2012-05-30 | 浙江方宏空调设备有限公司 | Vehicle air conditioning pipeline pressure silencer |
| CN203274207U (en) * | 2013-06-07 | 2013-11-06 | 宁波奥克斯电气有限公司 | Air conditioner silencer |
| CN106015818A (en) * | 2016-07-06 | 2016-10-12 | 南京常荣声学股份有限公司 | Noise elimination energy-saving pipeline |
| CN107542668A (en) * | 2017-09-11 | 2018-01-05 | 珠海格力电器股份有限公司 | Denoising device, compressor and air conditioner |
-
2018
- 2018-10-18 CN CN201811215615.0A patent/CN109341052B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50136804U (en) * | 1974-04-26 | 1975-11-11 | ||
| JP2000320319A (en) * | 1999-05-11 | 2000-11-21 | Kojima Press Co Ltd | Muffler |
| JP2002327612A (en) * | 2001-04-27 | 2002-11-15 | Shintaro Yamada | Noise suppressor |
| US7497300B2 (en) * | 2004-03-18 | 2009-03-03 | D Angelo John P | Noise reduction tubes |
| CN202254196U (en) * | 2011-07-27 | 2012-05-30 | 浙江方宏空调设备有限公司 | Vehicle air conditioning pipeline pressure silencer |
| CN203274207U (en) * | 2013-06-07 | 2013-11-06 | 宁波奥克斯电气有限公司 | Air conditioner silencer |
| CN106015818A (en) * | 2016-07-06 | 2016-10-12 | 南京常荣声学股份有限公司 | Noise elimination energy-saving pipeline |
| CN107542668A (en) * | 2017-09-11 | 2018-01-05 | 珠海格力电器股份有限公司 | Denoising device, compressor and air conditioner |
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|---|---|
| CN109341052A (en) | 2019-02-15 |
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