CN108758748B - Low-noise range hood and noise reduction method - Google Patents
Low-noise range hood and noise reduction method Download PDFInfo
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- CN108758748B CN108758748B CN201810863495.9A CN201810863495A CN108758748B CN 108758748 B CN108758748 B CN 108758748B CN 201810863495 A CN201810863495 A CN 201810863495A CN 108758748 B CN108758748 B CN 108758748B
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- plate
- silencer
- shell
- turbine assembly
- housing
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003584 silencer Effects 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 230000001603 reducing effect Effects 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a low-noise range hood and a noise reduction method, which are used for reducing noise generated when the range hood works. The low-noise range hood comprises a shell, a fan turbine component and a silencer, wherein the fan turbine component and the silencer are arranged in an inner cavity of the shell, the shell of the fan turbine component is connected with the inner wall of the shell, the silencer is connected with the shell of the fan turbine component, and a sealing cavity is formed between the shell of the fan turbine component and the silencer.
Description
Technical Field
The invention relates to a range hood, in particular to a low-noise range hood and a noise reduction method.
Background
In China, a range hood is a commonly used household appliance. The range hood is used for absorbing the oil smoke generated in the cooking process and exhausting the oil smoke outdoors. Existing extractor hoods generally include a housing, a turbine, a motor, fan blades, and the like. The motor drives the turbine and the fan blade to rotate, so that negative pressure is generated inside the shell, and oil smoke positioned outside the shell is adsorbed. The outside of turbine is equipped with the casing, and the casing is connected with the shell. The range hood with the structure generates larger noise during working, so that the human body is uncomfortable.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a low noise range hood and a noise reduction method are provided to reduce noise generated when the range hood works.
To solve the technical problems: the invention adopts the following technical scheme:
in one aspect, an embodiment of the invention provides a low-noise range hood, which comprises a shell, and a fan turbine assembly and a silencer which are positioned in an inner cavity of the shell and comprise shells, wherein the shells of the fan turbine assembly are connected with the inner wall of the shell, the silencer is connected with the shells of the fan turbine assembly, and a sealing cavity is formed between the shells of the fan turbine assembly and the silencer.
As a preferred example, the low noise range hood further comprises a separation plate, wherein the separation plate is respectively connected with the shells of the silencer and the fan turbine assembly, so that a sealing cavity is formed between the shells of the silencer and the fan turbine assembly.
As a preferred example, the low-noise range hood further comprises a front silencer plate, wherein the front silencer plate is positioned in the shell, is connected with the shell and is opposite to the front air inlet of the fan turbine assembly.
As a preferable example, the included angle between the front silencer board and the front shell board is 0-10 degrees, and the distance from the bottom end of the front silencer board to the front shell board is equal to or smaller than the distance from the top end of the front silencer board to the front shell board.
As a preferred example, the front silencer panel is vertically arranged.
As a preferred example, the low-noise range hood further comprises a rear silencer plate, wherein the rear silencer plate is positioned in the shell, is connected with the shell and is opposite to the rear air inlet of the fan turbine assembly.
As a preferable example, the included angle between the rear silencer plate and the rear shell plate is 0-10 degrees, and the distance from the bottom end of the rear silencer plate to the rear shell plate is equal to or smaller than the distance from the top end of the rear silencer plate to the rear shell plate.
As a preferred example, the rear muffler plate is vertically disposed.
As a preferred example, the front and rear muffler plates absorb centrifugal fan noise, reducing back and forth reflection noise between the housing and the fan turbine assembly.
On the other hand, the embodiment of the invention also provides a noise reduction method of the range hood, which comprises the following steps:
connecting the isolation plate to the muffler and the housing of the fan turbine assembly so that a sealed cavity is formed between the housing of the fan turbine assembly and the muffler;
starting a fan turbine component to generate negative pressure, and enabling external oil smoke to pass through an air inlet of the shell along with air flow to enter the fan turbine component; the use of a sealed cavity reduces airflow to create secondary noise and reduces back and forth reflection noise between the casing and the turbine assembly.
As a preferred example, the noise reduction method of the range hood further includes: the front muffler is disposed in the housing and is opposite the front air inlet on the housing of the blower turbine assembly.
As a preferred example, the noise reduction method of the range hood further includes: the rear muffler is disposed in the housing and is opposite the rear air inlet on the housing of the blower turbine assembly.
Compared with the prior art, the low-noise range hood provided by the embodiment of the invention can reduce the noise generated when the range hood works. The range hood of the embodiment of the invention comprises a shell and a fan turbine component. The fan turbine assembly includes a housing. The shell of the fan turbine component is connected with the inner wall of the shell, and a sealing cavity is formed between the shell of the fan turbine component and the shell. In the prior art, the shell and the shell of the fan turbine assembly are only in positioning connection, and a closed space is not formed between the shell and the shell. The fan turbine assembly produces noise when in operation. By sealing between the housing and the shell, a sealed cavity is formed, which can significantly reduce noise.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic illustration of the assembly of a muffler, a partition, and a fan turbine assembly in an embodiment of the present invention;
fig. 3 is a schematic view showing the assembly of a muffler and a partition plate in an embodiment of the present invention.
The drawings are as follows: a housing 1, a fan turbine assembly 2, a casing 201, a front muffler plate 3, a rear muffler plate 4, a muffler 5, and a partition plate 6.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the range hood according to the embodiment of the present invention includes a housing 1, and a fan turbine assembly 2 and a muffler 5 including a housing 201 disposed in an inner cavity of the housing 1. The fan turbine assembly 2 is connected to the inner wall of the housing 1, and the muffler 5 is connected to the casing 201 of the fan turbine assembly. A sealed cavity is formed between the housing 201 of the fan turbine assembly and the muffler 5.
In the above embodiment, a sealed cavity is formed between the housing 201 of the fan turbine assembly and the muffler 5. In the prior art, the muffler 5 is connected to the housing 201 of the fan turbine assembly, and a gap is formed between the muffler and the housing, which communicates with the air inlet channel and the inner cavity of the muffler 5. No sealed space is formed between the housing 201 and the muffler 5. The fan turbine assembly 2 produces noise when in operation. By connecting the housing 201 and the muffler 5 to form a sealed cavity, noise can be reduced. After the sealed cavity is formed, the air inlet channel is smoother, and secondary noise generated by air flow is reduced. At the same time, the sealed cavity can reduce the propagation of noise inside the cavity and help reduce back and forth reflected noise between the fan panel and the centrifugal fan.
The casing 201 and the muffler 5 may be connected to each other by a separate seal member for achieving a sealing effect, and may be connected to the casing 201 and the muffler 5, or the seal member and the muffler 5 may be integrally formed, and the whole may be connected to the casing 201. For ease of assembly and disassembly, the seal is preferably provided separately. For example, as shown in fig. 3, the seal is a separator 6. The partition plate 6 is connected to the muffler 5 and the housing 201 of the fan turbine assembly, respectively, such that a sealed cavity is formed between the muffler 5 and the housing 201 of the fan turbine assembly. In this way, due to the obstruction of the partition 6, the air flow in the air intake channel between the casing 1 and the housing 201 does not directly enter the sealed cavity, but passes through the air intake of the housing 201 into the fan turbine assembly 2.
As a preferred example, the range hood further comprises a front silencer panel 3, the front silencer panel 3 is located in the casing 1, and the front silencer panel 3 is connected with the casing 1 and opposite to the front air inlet of the fan turbine assembly 2. The fan turbine assembly 2 includes a front air inlet and a rear air inlet. The front muffler plate 3 is made of a material having a noise reducing effect, such as polyester fiber, foam, or the like. When the fan is in operation, a person is positioned in front of the front air inlet of the fan turbine assembly 2, so that the front silencing plate 3 is arranged at the front part of the shell 1, and the harm of noise to the hearing of the person can be remarkably reduced. The fan turbine assembly 2 produces noise when working, and the noise is mainly transmitted outwards through the front air inlet and the rear air inlet of the fan turbine assembly 2. Therefore, the front silencer panel 3 is opposite to the front air inlet of the fan turbine assembly 2, so that noise can be remarkably reduced.
As a preferred example, the included angle between the front silencer board 3 and the front plate of the shell 1 is 0-10 degrees, and the distance from the bottom end of the front silencer board 3 to the front plate of the shell 1 is equal to or smaller than the distance from the top end of the front silencer board 3 to the front plate of the shell 1. The included angle between the front silencer board 3 and the front board of the shell 1 is set to be within 0-10 degrees. In this way, the arrangement of the front muffler plate 3 does not affect the flow of air in the front intake passage, which is constituted by the front plate of the casing 1 and the casing 201 of the turbine assembly 2. If the angle between the front muffler plate 3 and the front plate of the housing 1 is too large, the flow of the air flow is blocked, and the air flow speed is reduced.
In the prior art, the passage formed between the muffler plate 3 and the surface of the housing 201 of the fan turbine assembly 2 is gradual in order to damp the soot before it enters the housing 201. And in the preferred embodiment, noise generated by the operation of the fan turbine assembly 2 is eliminated. Part of the noise generated by the operation of the blower turbine assembly 2 enters the channel between the front silencer plate 3 and the surface of the housing 201 of the blower turbine assembly 2 through the front air inlet, and the noise is absorbed through the front silencer plate 3.
Preferably, the front muffler plate 3 is vertically disposed. The front silencer panel 3 is opposite to the whole front air inlet of the fan turbine assembly 2. The airflow containing the oil fume enters the front air inlet from the outside through the air inlet channel between the front silencer plate 3 and the shell 201 of the turbine component of the fan. The front silencer plate 3 is vertically arranged, so that the air inlet speed is not affected.
For further noise reduction, the low noise range hood further comprises a rear silencer plate 4, wherein the rear silencer plate 4 is positioned in the shell 1, and the rear silencer plate 4 is connected with the shell 1 and opposite to a rear air inlet of the fan turbine assembly 2. The material of the rear muffler plate 4 may be the same as or different from that of the front muffler plate 3, and may be any material having a sound deadening effect, such as polyester fiber, foamed plastic, or the like.
The fan turbine assembly 2 produces noise when working, and the noise is mainly transmitted outwards through the front air inlet and the rear air inlet of the fan turbine assembly 2. Therefore, the rear muffler plate 4 is opposite to the rear air inlet of the blower turbine assembly 2, so that noise can be reduced.
As a preferred example, the included angle between the rear muffler plate 4 and the rear plate of the housing 1 is 0-10 °, and the distance from the bottom end of the rear muffler plate 4 to the rear plate of the housing 1 is equal to or less than the distance from the top end of the rear muffler plate 4 to the rear plate of the housing 1. The included angle between the rear silencing plate 4 and the rear plate of the shell 1 is within 0-10 degrees. In this way, the arrangement of the rear muffler plate 4 does not affect the flow of air in the rear intake passage, which is constituted by the rear plate of the casing 1 and the casing 201 of the turbine assembly 2. If the angle between the rear muffler plate 4 and the rear plate of the housing 1 is too large, the flow of the air flow is blocked, and the air flow speed is reduced.
Preferably, the rear muffler plate 4 is vertically disposed. The rear muffler plate 4 is opposite to the whole rear air inlet of the fan turbine assembly 2. The rear muffler plate 4 is vertically arranged so that the air intake speed is not affected.
In the preferred embodiment, noise generated by the operation of the fan turbine assembly 2 is reduced. Part of the noise generated by the operation of the fan turbine assembly 2 enters a channel between the rear silencer plate 4 and the surface of the shell 201 of the fan turbine assembly 2 through the rear air inlet, and the noise is absorbed through the rear silencer plate 4.
In the above embodiments or preferred examples, centrifugal fan noise may be considered approximately normal incidence to the panel of the housing through the fan inlet. Therefore, the front silencer plate 3 and the rear silencer plate 4 are arranged on the shell of the range hood, so that the noise of the centrifugal fan can be absorbed at maximum efficiency, and the back and forth reflection noise between the shell and the fan is reduced.
The embodiment of the invention also provides a noise reduction method of the range hood, which comprises the following steps:
attaching the partition plate 6 to the muffler 5 and the housing 201 of the fan turbine assembly such that a sealed cavity is formed between the housing 201 of the fan turbine assembly and the muffler 5;
starting the fan turbine assembly 2 to generate negative pressure, and enabling external oil smoke to pass through an air inlet of the shell 201 along with air flow to enter the fan turbine assembly 2; the use of a sealed cavity reduces the airflow to create secondary noise and reduces back and forth reflection noise between the housing 1 and the turbine assembly 2.
In the noise reduction method, the isolation plate 6 is arranged on the shell 201 and the silencer 5 to isolate the air inlet channel between the shell 201 and the shell 1 from the inner cavity of the silencer 5. Thus, after the air flow enters the air inlet channel, the air flow enters the fan turbine assembly 2 from the air inlet on the shell 201, and does not directly enter the inner cavity of the silencer 5. If the air flow directly enters the inner cavity of the silencer 5 from the air inlet channel, vortex flow can be generated, and noise reduction is not facilitated. After the sealed cavity is formed between the shell 201 and the muffler 5, the air inlet channel is smoother, and secondary noise generated by air flow is reduced.
As a preferred example, the noise reduction method further includes: a front muffler plate 3 is placed in the housing 1 with the front muffler plate 3 opposite the front air inlet on the housing 201 of the fan turbine assembly.
The above preferred embodiment dampens noise generated by operation of the fan turbine assembly 2. Part of noise generated by the operation of the fan turbine assembly 2 enters a front air inlet channel between the front silencer plate 3 and the surface of the shell 201 through a front air inlet on the shell 201 of the fan turbine assembly 2, and the noise is absorbed through the front silencer plate 3, so that the back and forth reflection noise of the noise between the shell 1 and the shell 201 is reduced.
As a preferred example, the noise reduction method further includes: the rear muffler plate 4 is placed in the housing (1) with the rear muffler plate 4 opposite the rear air inlet on the housing 201 of the fan turbine assembly.
The above preferred embodiment dampens noise generated by operation of the fan turbine assembly 2. Part of noise generated by the operation of the fan turbine assembly 2 enters a rear air inlet channel between the rear silencer plate 4 and the surface of the shell 201 through a rear air inlet on the shell 201 of the fan turbine assembly 2, and the noise is absorbed through the rear silencer plate 4, so that the back and forth reflection noise of the noise between the shell 1 and the shell 201 is reduced.
Experiments prove that the range hood adopting the technical scheme of the invention has good noise reduction effect.
Sample 1
The invention discloses a low-noise range hood. However, the front muffler plate and the rear muffler plate are not provided. The power of the fan is 261w. The diameters of the front air inlet and the rear air inlet on the shell are 205mm. The fan frame (i.e., housing) is sized to be 435 high mm, 380 long mm, and 320 wide mm.
Sample 2
The structure was the same as that of sample 1, but a front muffler plate and a rear muffler plate were additionally provided. The front silencer plate is opposite to the front air inlet of the fan turbine component. The rear silencer plate is opposite to a rear air inlet of the fan turbine component. The front muffler plate has a length 406mm and a width 302 mm. The rear muffler plate has a length of 400mm and a width of 345 and mm.
Sample 3
A low noise kitchen ventilator, the shell of the turbine component of the blower has no airtight connection with the outer shell, also does not set up the front muffler plate and back muffler plate.
According to national standard GB/T17713-2011, the noise reduction test is carried out on the range hood of the sample. The test results were as follows:
from the above test results, it can be seen that: sample 3 was not provided with the sealed cavity and the muffler plate of the present invention, and the noise data was 71.4db. Sample 1 was provided with the sealed cavity of the present invention, but without the muffler plate, and the noise data was 70.3db. Sample 1 noise was reduced by 1.1 db compared to sample 3. Sample 2 was provided with the sealed cavity of the present invention and front and rear muffler plates, with noise data of 67.4db. Sample 2 noise was reduced by 4db compared to sample 3.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the specific embodiments described above, and that the above specific embodiments and descriptions are provided for further illustration of the principles of the present invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (11)
1. The low-noise range hood is characterized by comprising a shell (1), a fan turbine assembly (2) and a silencer (5), wherein the fan turbine assembly (2) is arranged in an inner cavity of the shell (1) and comprises a shell body (201), the shell body (201) of the fan turbine assembly is connected with the inner wall of the shell (1), and the silencer (5) is connected with the shell body (201) of the fan turbine assembly;
the silencer and the air conditioner further comprises a separation plate (6), wherein the separation plate (6) is respectively connected with the silencer (5) and the shell (201) of the air conditioner turbine assembly, so that a sealing cavity is formed between the silencer (5) and the shell (201) of the air conditioner turbine assembly.
2. The low noise range hood according to claim 1, further comprising a front silencer plate (3), said front silencer plate (3) being located in the housing (1), the front silencer plate (3) being connected to the housing (1) and being opposite to the front air inlet of the fan turbine assembly (2).
3. The low noise range hood according to claim 2, characterized in that the angle between the front silencer plate (3) and the front plate of the housing (1) is 0-10 °, and the distance from the bottom end of the front silencer plate (3) to the front plate of the housing (1) is equal to or smaller than the distance from the top end of the front silencer plate (3) to the front plate of the housing (1).
4. A low noise range hood according to claim 2, characterized in that the front muffler plate (3) is arranged vertically.
5. The low noise range hood according to claim 2, further comprising a rear muffler plate (4), said rear muffler plate (4) being located within the housing (1), the rear muffler plate (4) being connected to the housing (1) and being opposite the rear air inlet of the fan turbine assembly (2).
6. The low noise range hood according to claim 5, wherein an included angle between the rear silencer plate (4) and the rear plate of the housing (1) is 0-10 degrees, and a distance from the bottom end of the rear silencer plate (4) to the rear plate of the housing (1) is equal to or smaller than a distance from the top end of the rear silencer plate (4) to the rear plate of the housing (1).
7. A low noise extractor hood according to claim 6, characterized in that said rear muffler plate (4) is arranged vertically.
8. A low noise range hood according to claim 5, characterized in that the front and rear sound-damping plates (3, 4) absorb centrifugal fan noise, reducing back and forth reflection noise between the housing (1) and the fan turbine assembly (2).
9. A method for reducing noise in a range hood, the method comprising:
connecting a partition plate (6) to the muffler (5) and the housing (201) of the fan turbine assembly, so that a sealing cavity is formed between the housing (201) of the fan turbine assembly and the muffler (5);
starting a fan turbine component (2) to generate negative pressure, and enabling external oil smoke to pass through an air inlet of a shell (201) along with air flow to enter the fan turbine component (2); the use of a sealed cavity reduces the airflow to create secondary noise and reduces back and forth reflection noise between the housing (1) and the turbine assembly (2).
10. The method of reducing noise in a range hood of claim 9, further comprising:
a front silencer plate (3) is arranged in the shell (1), and the front silencer plate (3) is opposite to a front air inlet on a shell (201) of the fan turbine assembly.
11. The method of reducing noise in a range hood according to claim 9 or 10, further comprising:
a rear silencer plate (4) is arranged in the shell (1), and the rear silencer plate (4) is opposite to a rear air inlet on a shell (201) of the fan turbine assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810863495.9A CN108758748B (en) | 2018-08-01 | 2018-08-01 | Low-noise range hood and noise reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810863495.9A CN108758748B (en) | 2018-08-01 | 2018-08-01 | Low-noise range hood and noise reduction method |
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| Publication Number | Publication Date |
|---|---|
| CN108758748A CN108758748A (en) | 2018-11-06 |
| CN108758748B true CN108758748B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810863495.9A Active CN108758748B (en) | 2018-08-01 | 2018-08-01 | Low-noise range hood and noise reduction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202074595U (en) * | 2011-05-11 | 2011-12-14 | 浙江帅康电气股份有限公司 | Guide type fume extractor |
| CN102748787A (en) * | 2012-06-15 | 2012-10-24 | 海尔集团公司 | Low noise range hood equipped with diversion noise reducing acoustical panel |
| CN203628765U (en) * | 2013-11-30 | 2014-06-04 | 宁波方太厨具有限公司 | Mute type range hood |
| CN106439959A (en) * | 2016-08-31 | 2017-02-22 | 杭州老板电器股份有限公司 | Low noise and large suction range hood |
| CN206755301U (en) * | 2017-05-10 | 2017-12-15 | 佛山市樱顺卫厨用品有限公司 | A kind of noise reduction range hood |
| CN208750799U (en) * | 2018-08-01 | 2019-04-16 | 浙江帅康电气股份有限公司 | A kind of low-noise exhauster for removing cooking fumes |
-
2018
- 2018-08-01 CN CN201810863495.9A patent/CN108758748B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202074595U (en) * | 2011-05-11 | 2011-12-14 | 浙江帅康电气股份有限公司 | Guide type fume extractor |
| CN102748787A (en) * | 2012-06-15 | 2012-10-24 | 海尔集团公司 | Low noise range hood equipped with diversion noise reducing acoustical panel |
| CN203628765U (en) * | 2013-11-30 | 2014-06-04 | 宁波方太厨具有限公司 | Mute type range hood |
| CN106439959A (en) * | 2016-08-31 | 2017-02-22 | 杭州老板电器股份有限公司 | Low noise and large suction range hood |
| CN206755301U (en) * | 2017-05-10 | 2017-12-15 | 佛山市樱顺卫厨用品有限公司 | A kind of noise reduction range hood |
| CN208750799U (en) * | 2018-08-01 | 2019-04-16 | 浙江帅康电气股份有限公司 | A kind of low-noise exhauster for removing cooking fumes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108758748A (en) | 2018-11-06 |
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