CN110220295A - Muffler and air-conditioning - Google Patents
Muffler and air-conditioning Download PDFInfo
- Publication number
- CN110220295A CN110220295A CN201910654623.3A CN201910654623A CN110220295A CN 110220295 A CN110220295 A CN 110220295A CN 201910654623 A CN201910654623 A CN 201910654623A CN 110220295 A CN110220295 A CN 110220295A
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- China
- Prior art keywords
- cavity
- noise
- reducing structure
- expansion
- partition
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of muffler and air-conditionings, the muffler includes: the first noise-reducing structure, first noise-reducing structure includes air inlet pipe, escape pipe and acoustic element, acoustic element includes at least two through-holes on the first expansion cavity and the side wall for being set to the first expansion cavity, and air inlet pipe and escape pipe are connected to the first expansion cavity；Second noise-reducing structure, the second noise-reducing structure include the second expansion cavity, and the first noise-reducing structure is set to the second expansion cavity；And partition, partition is set between the outer wall of the first noise-reducing structure and the inner wall of the second expansion cavity and the second expansion cavity is divided into the first cavity and the second cavity, first cavity is connected to by least one through-hole with the first expansion cavity, second cavity is connected to by least one through-hole with the first expansion cavity, and partition can be relative to the mobile volume-tunable for making the first cavity and the second cavity of the first noise-reducing structure.The muffler can be realized full frequency band noise reduction, and erasure effect is good.
Description
Technical field
The present invention relates to living electric apparatus technical fields, more particularly to a kind of muffler and air-conditioning.
Background technique
Muffler refers to for while having the airflow line of noise transmission, can be with the sound absorption pipeline of lining and curved
Head utilizes the noise reductions device such as sectional area sudden change and the discontinuous pipeline of other acoustic impedances, and noise in pipeline is made to be decayed
Or it reflects back.The former is known as resistive muffler, and the latter is known as resistant noise-reducing device, also there is the muffler of impedance complex formula.
Currently, tradition applies the muffler noise reduction frequency range on air-conditioning duct to limit to, and causes gas and suppressor wall
Plate interacts to form resonance, so that reducing erasure effect, seriously affects user experience.
Summary of the invention
Based on this, limit to for traditional muffler noise reduction frequency range, gas and muffler siding is caused to interact
Resonance is formed, so that reduce erasure effect, the problem of seriously affecting user experience, proposes a kind of muffler and air-conditioning,
The muffler can be realized full frequency band noise reduction, and erasure effect is good；The air-conditioning includes above-mentioned muffler, and therefore, which, which has, disappears
The good advantage of audio fruit.
Specific technical solution is as follows:
On the one hand, this application involves a kind of mufflers, comprising: the first noise-reducing structure, first noise-reducing structure include into
Tracheae, escape pipe and acoustic element, the acoustic element include the first expansion cavity and are set on the side wall of first expansion cavity
At least two through-holes, the air inlet pipe and the escape pipe are connected to first expansion cavity；Second noise-reducing structure, described
Two noise-reducing structures include the second expansion cavity, and first noise-reducing structure is set to second expansion cavity；And partition, the partition
It is set between the outer wall of first noise-reducing structure and the inner wall of second expansion cavity and divides second expansion cavity
For the first cavity and the second cavity, first cavity is connected to by least one described through-hole with first expansion cavity, institute
It states the second cavity and is connected to first expansion cavity by least one described through-hole, and the partition can relatively described first
The mobile volume-tunable for making first cavity and second cavity of noise-reducing structure.
When in use, air-flow enters the first expansion cavity along air inlet pipe to above-mentioned muffler, then respectively enters first along through-hole
Cavity and the second cavity are discharged by entering escape pipe after the noise reduction of the first expansion cavity, through-hole and the second expansion cavity；Further,
Since the partition can make the volume of first cavity and second cavity can relative to first noise-reducing structure movement
It adjusts, and then the acoustic reactance of the noise in adjustable second expansion cavity, to eliminate the noise of each frequency range.
Technical solution is illustrated further below:
First noise-reducing structure is movably arranged at second expansion cavity, and institute in one of the embodiments,
The outer wall that partition is fixedly arranged on first noise-reducing structure is stated, so that first noise-reducing structure is able to drive the partition movement and is used for
Adjust the volume of first cavity and second cavity.
The second noise-reducing structure includes the first mounting hole and the second mounting hole, first peace in one of the embodiments,
Dress hole and second mounting hole are connected to second expansion cavity, the outer diameter of the air inlet pipe and/or the escape pipe
Outer diameter is less than the outer diameter of the acoustic element, and one end of the air inlet pipe is connected to the acoustic element, and one end of the escape pipe connects
It is connected to the acoustic element, the other end of the air inlet pipe is movably arranged at first mounting hole, the outlet pipe
The other end is movably arranged at second mounting hole, and the acoustic element is set in second expansion cavity.
The muffler further includes power take-off mechanism in one of the embodiments, and the power take-off mechanism is set to
In second expansion cavity, and the output end of the power take-off mechanism is connect for driving the partition to move with the partition
It is dynamic, make the volume-tunable of first cavity and second cavity.
The second noise-reducing structure further includes the first installation shell in one of the embodiments, and second installs shell, described
First installation shell includes third cavity, and the second installation shell includes the 4th cavity, one end of the first installation shell
It puts in the 4th cavity, the third cavity is connected to form second expansion cavity with the 4th cavity.
The muffler further includes the first noise reduction layer and the second noise reduction layer, first noise reduction in one of the embodiments,
Layer is coated or covered in the inner wall of the third cavity, and second noise reduction layer is coated or covered in the 4th cavity
Wall.
First noise reduction layer and second noise reduction layer interval are arranged to form shifting chute in one of the embodiments,
One end of the partition is set in the shifting chute.
The muffler further includes the first protective layer in one of the embodiments, and first protective layer is coated or covered with
In the outer wall of first noise reduction layer；And/or the muffler further includes the second protective layer, second protective layer is coated or covered with
In the outer wall of second noise reduction layer.
The diameter of the through-hole is D in one of the embodiments, wherein 0.5mm≤D≤2mm.
On the other hand, the application further relates to a kind of air-conditioning, including the muffler in any of the above-described embodiment.
When in use, air-flow enters the first expansion cavity along air inlet pipe to above-mentioned air-conditioning, then respectively enters the first chamber along through-hole
Body and the second cavity are discharged by entering escape pipe after the noise reduction of the first expansion cavity, through-hole and the second expansion cavity；Further, by
It can make the volume-tunable of first cavity and second cavity relative to first noise-reducing structure movement in the partition,
And then the acoustic reactance of the noise in adjustable second expansion cavity, to eliminate the noise of each frequency range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of muffler；
Fig. 2 is the schematic diagram of the first noise-reducing structure.
Description of symbols:
10, muffler, the 100, first noise-reducing structure, 110, air inlet pipe, 120, escape pipe, 130, acoustic element, 132, through-hole,
140, partition, the 200, second noise-reducing structure, the 210, second expansion cavity, the 212, first cavity, the 214, second cavity, the 220, first peace
Fill shell, the 230, second installation shell, the 310, first noise reduction layer, the 320, second noise reduction layer, 330, shifting chute.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with attached drawing and specific embodiment party
Formula, the present invention is further described in detail.It should be understood that the specific embodiments described herein are only to solve
The present invention is released, and the scope of protection of the present invention is not limited.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When element is referred to as " being fixedly arranged on " another element, it can be directly in another yuan
On part or there may also be elements placed in the middle.When an element is considered as " connection " another element, it be can be directly
It is connected to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ",
"left", "right" and similar statement for illustrative purposes only, are not meant to be the only embodiment.
It is important to point out that when element is referred to as " being fixedly arranged on " another element, two elements can be it is integrated,
It can be and be detachably connected between two elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
Body embodiment purpose, it is not intended that in limitation the present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
In addition it is also necessary to understand, in the present embodiment, term "lower", "upper", "front", "rear", "left", "right",
"inner", "outside", "top", "bottom", " side ", " other side ", " one end ", " other end ", etc. indicated by positional relationship be based on
Positional relationship shown in the drawings；The terms such as " first ", " second " are to distinguish different structure members.These terms are only
Convenient for the description present invention and simplify description, is not considered as limiting the invention.
As depicted in figs. 1 and 2, one of embodiment muffler 10, comprising: the first noise-reducing structure 100, the first noise reduction
Structure 100 includes air inlet pipe 110, escape pipe 120 and acoustic element 130, and acoustic element 130 includes the first expansion cavity and is set to first
The air inlet of at least two through-holes 132 on the side wall of expansion cavity, the gas outlet of air inlet pipe 110 and escape pipe 120 is with first
Expansion cavity connection；Second noise-reducing structure 200, the second noise-reducing structure 200 include the second expansion cavity 210, and the first noise-reducing structure 100 is set
It is placed in the second expansion cavity 210, the second expansion cavity 210 is connected to by through-hole 132 with the first expansion cavity；And partition 140, partition 140
It is set between the outer wall of the first noise-reducing structure 100 and the inner wall of the second expansion cavity 210 and the second expansion cavity 210 is divided into
One cavity 212 and the second cavity 214, the first cavity 212 are connected to by least one through-hole 132 with the first expansion cavity, the second chamber
Body 214 is connected to by least one through-hole 132 with the first expansion cavity, and partition 140 can be mobile relative to the first noise-reducing structure 100
Make the volume-tunable of the first cavity 212 and the second cavity 214.
When in use, air-flow enters the first expansion cavity along air inlet pipe 110 to above-mentioned muffler 10, then enters along through-hole 132
Second expansion cavity 210 is discharged by entering escape pipe 120 after the noise reduction of the first expansion cavity, through-hole 132 and the second expansion cavity 210；
Further, since partition 140 can be relative to the mobile volume for making the first cavity 212 and the second cavity 214 of the first noise-reducing structure 100
It is adjustable, and then the acoustic reactance of the noise in adjustable second expansion cavity 210, to eliminate the noise of each frequency range.In this implementation
Example in, partition 140 with a thickness of 3mm-5mm, it is preferable that partition 140 with a thickness of 4mm.
As shown in Figure 1, in this embodiment, the quantity of through-hole 132 has multiple, and circumferentially-spaced along acoustic element 130 is set
It sets.Through-hole 132 can be using triangle manner arrangement or rectangular mode arrangement.
As shown in Figure 1, on the basis of the above embodiments, the first noise-reducing structure 100 is movably arranged at the second expansion
Chamber 210, and partition 140 is fixedly arranged on the outer wall of the first noise-reducing structure 100, and the first noise-reducing structure 100 is made to be able to drive the shifting of partition 140
It employs in the volume of adjustment the first cavity 212 and the second cavity 214.In this way, being driven by the way that the first noise-reducing structure 100 of driving is mobile
Partition 140 is mobile, and then the volume of adjustable first cavity 212 and the second cavity 214, adjusts the second expansion cavity to realize
The acoustic reactance of noise in 210.Specifically, corresponding driving mechanism can be set, such as linear motor either linear module drive
First noise-reducing structure 100 is mobile can also be mobile with the first noise-reducing structure of Manual-pushing 100.Further, can be added by partition 140
The rigidity of strong first noise-reducing structure 100 can reduce the radiation regeneration noise of the first noise-reducing structure 100.
As shown in Figure 1, the second noise-reducing structure 200 includes the first mounting hole and the second installation specific in this embodiment
Hole, the first mounting hole and the second mounting hole are connected to the second expansion cavity 210, the outer diameter and/or escape pipe 120 of air inlet pipe 110
Outer diameter be less than the outer diameter of acoustic element 130, one end of air inlet pipe 110 is connected to acoustic element 130, one end connection of escape pipe 120
In acoustic element 130, the other end of air inlet pipe 110 is movably arranged at the first mounting hole, and the other end of escape pipe 120 is removable
It is set to the second mounting hole dynamicly, acoustic element 130 is set in the second expansion cavity 210.Due to, the outer diameter of air inlet pipe 110 and/or
The outer diameter of escape pipe 120 is less than the outer diameter of acoustic element 130, and therefore, acoustic element 130 has position-limiting action, limits the first noise reduction knot
The moving distance of structure 100, and then may insure that muffler 10 can eliminate the noise of special frequency channel range.Specifically acoustic element
130 and first mounting hole spacing be L1, the length of the second noise-reducing structure 200 is L, wherein L1=1/5L~1/3L.Specifically,
The diameter of air inlet pipe 110 is D1, wherein D1=15mm~30mm, the diameter of exhaust pipe are D2, wherein D2=15mm~30mm, it is excellent
Choosing, take D1=D2=20mm.Specifically, the diameter of the first expansion cavity is D3, wherein D3/D1=2~5, it is preferred that D3/D1=
3；Specifically, acoustic element 130 with a thickness of t, wherein t=2mm~3mm, it is preferred that t=3mm.
It of courses, in other embodiments, which further includes power take-off mechanism, and power take-off mechanism is set to
In second expansion cavity 210, and the output end of power take-off mechanism is connect for driving the partition 140 mobile with partition 140, is made
The volume-tunable of first cavity 212 and the second cavity 214.In this way, power take-off mechanism can be arranged in the second expansion cavity 210
It drives the partition 140 mobile, realizes that automatic driving partition 140 is mobile；Specifically, power take-off mechanism can be linear motor
Either straight line mould group etc..
As shown in Figure 1, based on any of the above embodiments, the second noise-reducing structure 200 further includes the first installation shell
220 and second install shell 230, and the first installation shell 220 includes third cavity, and the second installation shell 230 includes the 4th cavity,
One end of first installation shell 220 is put in the 4th cavity, and third cavity and the 4th cavity are connected to form the second expansion cavity 210.
In this way, cooperatively forming the second expansion cavity 210 by the first installation shell 220 and the second installation shell 230, adjustable second expands
The volume of chamber 210 is opened, and then eliminates the noise of more multiband；Further, on the basis of this embodiment, the first installation shell
220 are movably arranged in the 4th cavity for adjusting the volume of the second expansion cavity 210；It of courses, in other embodiments,
Multiple first connecting portions are equipped in 4th cavity, the outer wall of the first installation shell 220 is equipped with second connect with first connecting portion
Interconnecting piece, second connecting portion can selectively connect the volume for adjusting the second expansion cavity 210 with first connecting portion.
As shown in Figure 1, the muffler 10 further includes the first noise reduction layer 310 and the second noise reduction specific in this embodiment
Layer 320, the first noise reduction layer 310 is coated or covered in the inner wall of third cavity, and the second noise reduction layer 320 is coated or covered in the 4th chamber
The inner wall of body.In this way, promoting the noise reduction effect of muffler 10 using the sound deadening of the first noise reduction layer 310 and the second noise reduction layer 320
Fruit；Specifically, the first noise reduction layer 310 and the second noise reduction layer 320 can be fiber absorbing material, mineral wool etc.；Preferably, first
Noise reduction layer 310 and the second noise reduction layer 320 are bulk density 20kg/m3Super glass wool.
As shown in Figure 1, further, the first noise reduction layer 310 and the setting of the second noise reduction layer 320 interval form shifting chute, partition
140 one end is set in shifting chute 330.In this way, limiting the moving distance of partition 140 by shifting chute 330, and then can disappear
Except the noise of special frequency channel range.
Specific in this embodiment, which further includes the first protective layer, the first protective layer be coated or covered in
The outer wall of first noise reduction layer 310.In this way, protecting the first noise reduction layer 310 by the first protective layer, the first noise reduction layer 310 is avoided to meet with
To destruction；Specifically, the first protective layer can be protective net.
Specific in this embodiment, which further includes the second protective layer, the second protective layer be coated or covered in
The outer wall of second noise reduction layer 320.In this way, protecting the second noise reduction layer 320 by the second protective layer, the second noise reduction layer 320 is avoided to meet with
To destruction；Specifically, the second protective layer can be protective net.
In any of the above-described embodiment, the diameter of through-hole 132 is D, wherein 0.5mm≤D≤2mm.When the hole of through-hole 132
Diameter in the range when, erasure effect is preferable；Specifically, D can be 0.5mm, 0.8mm, 1mm, 1.5mm and 2mm.Specifically,
The punching rate of acoustic element 130 takes 1%~5%, when punching rate in the range when, erasure effect is preferable；Preferably, acoustic element
130 punching rate is 3.5%, and wherein punching rate refers in 130 surface of acoustic element, ratio occupied by through-hole 132.
It is important to point out that when in use, when being connected with refrigerant or other refrigeration being harmful to the human body in air inlet pipe 110
When agent, needs to seal gap and sealing escape pipe 120 and second between air inlet pipe 110 and the first mounting hole by sealing element and pacify
Fill the gap between hole；When being connected with other harmless refrigerants, such as carbon dioxide in air inlet pipe 110, then air inlet pipe
110 and first can have gap between mounting hole, can there is gap between escape pipe 120 and the second mounting hole.In addition, partition
140 and second expansion cavity 210 inner wall between gap it is smaller, it is preferable that the inner wall of partition 140 and the second expansion cavity 210 it
Between be tightly connected.
One of one embodiment air-conditioning, including the muffler 10 in any of the above-described embodiment.
When in use, air-flow enters the first expansion cavity along air inlet pipe 110 to above-mentioned air-conditioning, then enters second along through-hole 132
Expansion cavity 210 is discharged by entering escape pipe 120 after the noise reduction of the first expansion cavity, through-hole 132 and the second expansion cavity 210；Into one
Step, since partition 140 can make the volume of the first cavity 212 and the second cavity 214 can relative to the movement of the first noise-reducing structure 100
It adjusts, and then the acoustic reactance of the noise in adjustable second expansion cavity 210, to eliminate the noise of each frequency range.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of muffler characterized by comprising
First noise-reducing structure, first noise-reducing structure include air inlet pipe, escape pipe and acoustic element, and the acoustic element includes first
Expansion cavity and at least two through-holes being set on the side wall of first expansion cavity, the air inlet pipe and the escape pipe with
The first expansion cavity connection；
Second noise-reducing structure, second noise-reducing structure include the second expansion cavity, and first noise-reducing structure is set to described the
Two expansion cavities；And
Partition, the partition are set between the outer wall of first noise-reducing structure and the inner wall of second expansion cavity and by institutes
It states the second expansion cavity and is divided into the first cavity and the second cavity, first cavity passes through at least one described through-hole and described the
The connection of one expansion cavity, second cavity is connected to by least one described through-hole with first expansion cavity, and the partition
It can be relative to the mobile volume-tunable for making first cavity and second cavity of first noise-reducing structure.
2. muffler according to claim 1, which is characterized in that first noise-reducing structure is movably arranged at described
Second expansion cavity, and the partition is fixedly arranged on the outer wall of first noise-reducing structure, is able to drive first noise-reducing structure
The partition moves the volume for adjusting first cavity and second cavity.
3. muffler according to claim 1, which is characterized in that the second noise-reducing structure includes the first mounting hole and the second peace
Fill hole, first mounting hole and second mounting hole be connected to second expansion cavity, the outer diameter of the air inlet pipe with/
Or the outer diameter of the escape pipe is less than the outer diameter of the acoustic element, one end of the air inlet pipe is connected to the acoustic element, described
One end of escape pipe is connected to the acoustic element, and the other end of the air inlet pipe is movably arranged at first mounting hole,
The other end of the outlet pipe is movably arranged at second mounting hole, and the acoustic element is set to second expansion
It is intracavitary.
4. muffler according to claim 1, which is characterized in that it further include power take-off mechanism, the output machine
Structure is set in second expansion cavity, and the output end of the power take-off mechanism connect with the partition it is described for driving
Partition is mobile, makes the volume-tunable of first cavity and second cavity.
5. muffler according to claim 1, which is characterized in that the second noise-reducing structure further includes the first installation shell and
Two installation shells, it is described first installation shell include third cavity, it is described second installation shell include the 4th cavity, described first
One end of installation shell is put in the 4th cavity, and the third cavity is connected to form second expansion with the 4th cavity
Open chamber.
6. muffler according to claim 5, which is characterized in that it further include the first noise reduction layer and the second noise reduction layer, it is described
First noise reduction layer is coated or covered in the inner wall of the third cavity, and second noise reduction layer is coated or covered in the 4th chamber
The inner wall of body.
7. muffler according to claim 6, which is characterized in that first noise reduction layer and second noise reduction layer interval
Setting forms shifting chute, and one end of the partition is set in the shifting chute.
8. muffler according to claim 6, which is characterized in that further include the first protective layer, first protective layer applies
Cover or be coated on the outer wall of first noise reduction layer；And/or further include the second protective layer, second protective layer is coated or covered with
In the outer wall of second noise reduction layer.
9. muffler according to any one of claims 1 to 8, which is characterized in that the diameter of the through-hole is D, wherein
0.5mm≤D≤2mm。
10. a kind of air-conditioning, which is characterized in that including the described in any item mufflers of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654623.3A CN110220295A (en) | 2019-07-19 | 2019-07-19 | Muffler and air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654623.3A CN110220295A (en) | 2019-07-19 | 2019-07-19 | Muffler and air-conditioning |
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| Publication Number | Publication Date |
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| CN110220295A true CN110220295A (en) | 2019-09-10 |
Family
ID=67812574
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910654623.3A Pending CN110220295A (en) | 2019-07-19 | 2019-07-19 | Muffler and air-conditioning |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848963A (en) * | 2019-10-30 | 2020-02-28 | 珠海格力电器股份有限公司 | Cavity length-adjustable formula muffler and air conditioner |
| CN111883350A (en) * | 2020-07-21 | 2020-11-03 | 武汉大学 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN112483688A (en) * | 2020-11-19 | 2021-03-12 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
| CN113357714A (en) * | 2021-07-12 | 2021-09-07 | 珠海格力电器股份有限公司 | Resonance type muffler and air conditioner |
-
2019
- 2019-07-19 CN CN201910654623.3A patent/CN110220295A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848963A (en) * | 2019-10-30 | 2020-02-28 | 珠海格力电器股份有限公司 | Cavity length-adjustable formula muffler and air conditioner |
| CN111883350A (en) * | 2020-07-21 | 2020-11-03 | 武汉大学 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN111883350B (en) * | 2020-07-21 | 2021-11-05 | 国网河南省电力公司电力科学研究院 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN112483688A (en) * | 2020-11-19 | 2021-03-12 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
| CN112483688B (en) * | 2020-11-19 | 2022-08-09 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
| CN113357714A (en) * | 2021-07-12 | 2021-09-07 | 珠海格力电器股份有限公司 | Resonance type muffler and air conditioner |
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