CN213272874U - Noise eliminator and total heat exchange system - Google Patents
Noise eliminator and total heat exchange system Download PDFInfo
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- CN213272874U CN213272874U CN202022039214.3U CN202022039214U CN213272874U CN 213272874 U CN213272874 U CN 213272874U CN 202022039214 U CN202022039214 U CN 202022039214U CN 213272874 U CN213272874 U CN 213272874U
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- pipeline
- muffling
- insert
- horn
- total heat
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Abstract
The utility model provides a noise eliminator and total heat exchange system belongs to air conditioner technical field. The silencer is arranged at the tail end of the pipeline and comprises a horn cylinder connected to the pipeline opening of the pipeline, and the horn cylinder is provided with a flaring part; at least one silencing insertion piece is connected in the horn cylinder; the disc body is connected to one end, far away from the pipeline, of the silencing insert, and a gap L is formed between the disc body and the end part of the flaring part in the axial direction; and the air supply air flow is sent out from the interval L through the pipeline and the horn cylinder. The total heat exchange system is provided with the silencing device. The utility model discloses can eliminate the standing wave noise of pipeline mouth.
Description
Technical Field
The utility model belongs to the technical field of the air conditioner, especially, relate to a noise eliminator and total heat exchange system.
Background
A ceiling-mounted air conditioning apparatus, such as a total heat exchanger, has a supply duct connected to the total heat exchanger, and is connected to each room through the supply duct to supply air to the room. However, when a total heat exchanger is used, periodic "beep" standing wave noise is generated at the end of the supply duct.
Disclosure of Invention
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the noise eliminator and the total heat exchange system are provided, and the standing wave noise at the pipeline opening can be eliminated.
According to one aspect of the present disclosure, a muffler device is provided, which is installed at an end of a pipe, and includes a horn cylinder connected to a pipe orifice of the pipe, the horn cylinder having a flared portion; at least one silencing insertion piece is connected in the horn cylinder; the disc body is connected to one end, far away from the pipeline, of the silencing insert, and a gap L is formed between the disc body and the end part of the flaring part in the axial direction; and the air supply air flow is sent out from the interval L through the pipeline and the horn cylinder.
According to the silencer disclosed by the invention, the horn cylinder is connected to the tail end of the pipeline, and the section of the horn cylinder is gradually increased, so that the sound wave reflection caused by the acoustic impedance mutation is reduced, the standing wave noise of the air duct opening is weakened, and meanwhile, the insert silencer is arranged in the horn cylinder, so that the sound field of the pipeline is further changed, and the standing wave noise is eliminated; in addition, the inserted sheet silencer is installed at the air supply port end of the pipeline, and air supply quantity in the pipeline cannot be influenced.
According to an embodiment of the present disclosure, a cross-sectional curve function R of the flared portion in the axial direction is an exponential function, a power function, or a circular arc.
According to the embodiment of the disclosure, the noise elimination inserting sheet is connected with the horn barrel, or the noise elimination inserting sheet extends into the pipeline and is connected with the pipeline.
According to an embodiment of the present disclosure, the size of the interval L is adjustable.
According to the embodiment of the disclosure, the noise elimination inserting piece is clamped in the horn tube.
According to the embodiment of the disclosure, the disc body and the silencing insertion sheet are integrally arranged or are in split connection.
According to the embodiment of the disclosure, sound absorption materials are arranged on the outer surface of the noise elimination inserting sheet and one side, facing the horn cylinder, of the disc body.
According to the embodiment of the disclosure, a plurality of silencing holes are formed in the silencing insertion piece, and the silencing holes are at least one of round, square or diamond.
According to the embodiment of the disclosure, the silencing insertion sheet is provided with a plurality of insertion sheets which are arranged in parallel or non-parallel.
According to another aspect of the present disclosure, there is provided an enthalpy exchange system including an enthalpy exchanger having a pipe connected thereto; and the silencing device is connected to the tail end of the pipeline.
According to the total heat exchange system disclosed by the invention, the horn cylinder is connected to the tail end of the pipeline, the section of the horn cylinder is gradually increased, the sound wave reflection caused by the acoustic impedance mutation is reduced, the standing wave noise of the air duct opening is weakened, and meanwhile, the insert piece silencer is arranged in the horn cylinder, so that the sound field of the pipeline is further changed, and the standing wave noise of the air supply opening of the total heat exchange system is eliminated; in addition, the inserted sheet silencer is installed at the air supply port end of the pipeline, and air supply quantity in the pipeline cannot be influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the construction of a total heat exchange system;
FIG. 2 is a schematic illustration of acoustic wave propagation at a pipe orifice in the prior art;
FIG. 3 is a schematic diagram of a structure at a duct port according to an embodiment of the present disclosure;
FIG. 4 is a front view of a muffler assembly according to an embodiment of the present disclosure;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic view of a muffler insert and horn barrel of a muffler assembly according to an embodiment of the present disclosure;
FIG. 7 is an enlarged view of B of FIG. 6;
FIG. 8 is a perspective view of a first example of a tab muffler of a muffling apparatus according to an embodiment of the present disclosure;
FIG. 9 is a perspective view of a second example of a tab muffler of a muffling apparatus according to an embodiment of the present disclosure;
FIG. 10 is a cross-sectional view from another perspective of a muffler assembly according to an embodiment of the present disclosure;
FIG. 11 is a bottom view of a horn cylinder of a muffler assembly according to an embodiment of the present disclosure;
in the above figures: 1. a total heat exchanger; 2. a pipeline; 3. a muffler device; 31. a horn cylinder; 311. a flared part; 312. a card slot; 313. a tripod; 32. an insert muffler; 321. a silencing insert; 3211. a clamping block; 3212. a sound-deadening aperture; 322. a tray body; 3221. a screw; 4. silencing cotton.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
Fig. 1 is a schematic diagram of the structure of a total heat exchange system.
Referring to fig. 1, the total heat exchange system includes a total heat exchanger 1 and a duct 2, the total heat exchanger 1 is usually installed in a ceiling type, the duct 2 is connected to the total heat exchanger 1, and the other end of the duct 2 extends into an indoor room to supply air to the indoor room.
The structural principle of the total heat exchange system is applicable to the prior art, is not the focus of the present disclosure, and is not described in detail herein.
Fig. 2 is a schematic illustration of acoustic wave propagation at a pipe orifice in the prior art.
Referring to fig. 2, when the total heat exchanger 1 is operated, air is supplied into an indoor room through a duct 2, a periodic "call" abnormal sound is generated at an air supply port (the end of the duct 2), and the abnormal sound is further determined to be caused by a duct standing wave phenomenon.
For a clearer understanding of the present disclosure, the following description will be made of the mechanism of the generation of the standing wave phenomenon:
in the pipeline acoustics, the sound wave at the pipeline outlet interface changes suddenly into the room area S2 due to the sectional area S1 of the pipeline outlet, so that the acoustic impedance (acoustic impedance formula is shown below) of the pipeline at the outlet interface changes dramatically, the sound wave at the interface generates physical phenomena such as reflection, transmission, refraction and the like due to the acoustic impedance change, and the phenomenon of constant frequency and amplified amplitude is called pipeline standing wave phenomenon when the plane sound wave is reflected at the pipeline interface and then is superposed with the original incident sound wave.
In the formula:
z is acoustic impedance;
ρ0is the density of the medium;
c0is the medium sound velocity;
and S is the cross-sectional area.
As shown in fig. 2, the standing wave is mainly caused by the acoustic impedance change before and after the pipeline port due to the abrupt change of the sectional area of the pipeline port (the sectional area behind the pipeline port is abrupt changed into the sectional area of the room), so that the acoustic reflection at the pipeline port and the incident wave are superposed to generate the standing wave phenomenon that the frequency is the same as the incident frequency, but the sound pressure amplitude is one time of the incident sound wave.
The invention provides a silencing device 3, which is used for weakening the standing wave phenomenon at the pipeline opening and reducing the standing wave noise at the air supply opening, wherein the silencing device 3 is arranged at the tail end of a pipeline 2.
FIG. 3 is a schematic diagram of a structure at a duct port according to an embodiment of the present disclosure; FIG. 4 is a front view of a muffler assembly according to an embodiment of the present disclosure; fig. 5 is a sectional view taken along line a-a in fig. 4.
Referring to fig. 3 to 5, in particular, the muffler device 3 comprises: a horn 31 and a tab muffler 32.
The horn cylinder 31 has a flared portion 311 with a gradually increasing sectional area, and the small-diameter end of the horn cylinder 31 is connected to the end of the pipe 2 as the continuation of the pipe 2, so that the pipe orifice area of the whole pipe 2 is gradually increased, the sound wave reflection caused by acoustic impedance mutation is reduced, and the standing wave phenomenon is eliminated.
The insert sheet silencer 32 is connected in the horn 31 and extends out of the horn 31, so that the sound field of the pipeline is changed, and the standing wave noise is further eliminated.
According to the embodiment of the disclosure, the horn cylinder 31 is connected to the tail end of the pipeline 2, the section of the horn cylinder 31 is gradually increased, the sound wave reflection caused by the acoustic impedance mutation is reduced, the standing wave noise of an air duct opening is weakened, and meanwhile, the insert piece silencer 32 is arranged in the horn cylinder 31, so that the sound field of the pipeline is further changed, and the standing wave noise is eliminated; in addition, the insert sheet silencer 32 is installed at the air supply port end of the pipeline 2, and does not affect the air supply amount inside the pipeline 2.
The horn 31 may be integrally formed with the pipe 2; the horn cylinder 31 may be a separate connection, for example, a snap connection with the pipe 2, a threaded connection, or a connection by means of a hoop fastening.
The axial cross-sectional curve function R of the flared portion 311 in the horn 31 may be an exponential function, a power function, an arc, or the like. Wherein, the range of the tangent angle beta between the port of the horn cylinder 31 and the horizontal plane is 0-90 degrees.
Any shape in which the sectional area gradually increases in the axial direction falls within the scope of the present disclosure.
The tab muffler 32 includes a sound attenuating tab 321 and a disc 322.
The silencing insertion sheet 321 extends into the horn cylinder 31 and is connected with the horn cylinder 31, or the silencing insertion sheet 321 extends from the horn cylinder 31 to the pipeline 2 and is connected with the pipeline 2; the disc body 322 is connected with one end of the silencing insertion sheet 321 far away from the pipeline 2, the disc body 322 and the end part of the flaring part 311 have an interval L in the axial direction, and the air flow is sent out to a room from the interval L through the pipeline 2 and the horn cylinder 31. Thus, the tray body 322 has the function of dispersing the airflow, and can replace the diffuser in the prior art, thereby avoiding the direct blowing of the airflow from the horn cylinder 31.
FIG. 6 is a schematic view of a muffler insert and horn barrel of a muffler assembly according to an embodiment of the present disclosure; fig. 7 is an enlarged view of B in fig. 6.
Specifically, referring to fig. 6 and 7, the noise elimination insert 321 may be in a form of being clamped in the horn cylinder 31, for example, a latch 3211 is provided at an end of the noise elimination insert 321, a latch 312 is provided on an inner wall of the horn cylinder 31, the noise elimination insert 321 is inserted into the horn cylinder 31, and the noise elimination insert 321 is fixed on the horn cylinder 31 by the cooperation of the latch 3211 and the latch 312.
The outer surface of the silencing insertion sheet 321 is adhered with sound-absorbing cotton 4 made of sound-absorbing material, which can be polyurethane, polyester fiber, PE, EPDM, polypropylene and other sound-absorbing materials.
In some embodiments, the silencing insertion pieces 321 may be disposed in a plurality of rows, which may be disposed in parallel (fig. 8) or disposed in non-parallel, and the intervals between the silencing insertion pieces 321 may be equal or unequal, so that the sound field in the pipeline 2 may be changed regardless of how the silencing insertion pieces are disposed, which falls within the protection scope of the present invention.
In addition, referring to fig. 9, the silencing insertion sheet 321 may further have a plurality of silencing holes 3212, and the shape of the silencing holes 3212 may be a circular hole, a square hole, a diamond hole, or the like, or a combination of a plurality of shapes.
The side of the disk body 322 facing the horn cylinder 31 is provided with sound absorption cotton 4 made of sound absorption material, which can be polyurethane, polyester fiber, PE, EPDM, polypropylene and other sound absorption materials.
The disc body 322 and the silencing insertion sheet 321 can be integrally formed or connected with each other; when the two bodies are connected, the two bodies can adopt a plugging or clamping mode.
In some embodiments, the size of the interval L can be adjusted, that is, the blade muffler 32 can be lifted relative to the horn 31, and the air supply amount can be changed by changing the interval L, so that the air supply amount can be adjusted.
Illustratively, referring to fig. 10 and 11, a screw 3221 extends from the center of the disc body 322 in the direction of the horn cylinder 31, a triangular frame 313 is arranged in the horn cylinder 31, a threaded hole is formed in the center of the triangular frame 313, the screw 3221 is screwed into the threaded hole of the triangular frame 313 to connect the insert muffler 32 with the horn cylinder 31, and the height of the insert muffler 32, i.e., the adjustment interval L, can be changed by rotating the disc body 322.
The present disclosure also proposes a total heat exchange system comprising a total heat exchanger 1, a pipe 2 and a silencing device 3. The total heat exchanger 1 is connected with a pipeline 2, and the tail end of the pipeline 2 is connected with a silencer 3.
According to the total heat exchange system disclosed by the invention, the tail end of the pipeline 2 is connected with the silencer 3, the section of the horn cylinder 31 in the silencer 3 is gradually increased, so that the sound wave reflection caused by the acoustic impedance mutation is reduced, the standing wave noise of the pipeline opening is weakened, and meanwhile, the insert piece silencer 32 is arranged in the horn cylinder 31, so that the sound field of the pipeline is further changed, and the standing wave noise of the air supply opening of the total heat exchange system is eliminated; in addition, the insert sheet silencer 32 is installed at the air supply port end of the pipeline 2, and does not affect the air supply amount in the pipeline.
The muffler device 3 of the present disclosure can be applied to not only a total heat exchanger system but also various systems having a supply air duct, and for example, the muffler device 3 of the present disclosure can be used for a supply air duct end of a central air conditioning system, a supply air duct end of a duct type air conditioner, and the like.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A muffler assembly for installation at the end of a pipe, comprising:
the horn cylinder is connected to the pipeline opening of the pipeline and is provided with a flaring part;
at least one silencing insertion piece is connected in the horn cylinder; and
the disc body is connected to one end, far away from the pipeline, of the silencing insert, and a gap L is formed between the disc body and the end part of the flaring part in the axial direction;
and the air supply air flow is sent out from the interval L through the pipeline and the horn cylinder.
2. The muffling device of claim 1, wherein the muffling insert is connected to the horn, or wherein the muffling insert extends into the pipe to connect to the pipe.
3. The muffling device of claim 1, wherein the spacing L is adjustable in size.
4. The muffling device of claim 1, wherein the muffling insert is snapped within the horn barrel.
5. The muffling device of claim 1, wherein the disc and the muffling insert are integrally or separately attached.
6. The muffling device of claim 1, wherein the outer surface of the muffling insert and the side of the tray body facing the horn cylinder are each provided with a sound absorbing material.
7. The muffling device of claim 1, wherein the muffling insert is provided with a plurality of muffling holes, and the muffling holes are at least one of circular, square or diamond.
8. The muffling device of claim 1, wherein the muffling insert comprises a plurality of inserts, and the inserts are arranged in parallel or non-parallel.
9. A sound-damping arrangement according to claim 1, characterised in that the cross-sectional curve function R of the flared portion in the axial direction is an exponential function, a power function or a circular arc.
10. A total heat exchange system, comprising:
the total heat exchanger is connected with a pipeline; and
a sound-damping device as claimed in any one of claims 1 to 9, attached to the end of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022039214.3U CN213272874U (en) | 2020-09-17 | 2020-09-17 | Noise eliminator and total heat exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022039214.3U CN213272874U (en) | 2020-09-17 | 2020-09-17 | Noise eliminator and total heat exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213272874U true CN213272874U (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022039214.3U Active CN213272874U (en) | 2020-09-17 | 2020-09-17 | Noise eliminator and total heat exchange system |
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| CN (1) | CN213272874U (en) |
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- 2020-09-17 CN CN202022039214.3U patent/CN213272874U/en active Active
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