CN113339861A - Noise detection method for range hood - Google Patents
Noise detection method for range hood Download PDFInfo
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- CN113339861A CN113339861A CN202110628230.2A CN202110628230A CN113339861A CN 113339861 A CN113339861 A CN 113339861A CN 202110628230 A CN202110628230 A CN 202110628230A CN 113339861 A CN113339861 A CN 113339861A
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- 238000001514 detection method Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000779 smoke Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000009434 installation Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000011022 operating instruction Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 3
- 235000019504 cigarettes Nutrition 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a noise detection method of a range hood, which comprises the following steps: the method comprises the following steps: acquiring air performance data of the range hood and drawing an air volume-static pressure curve and an air volume-power curve; step two: installing a range hood and noise testing equipment positioned at the test point, installing a smoke pipe of the range hood, and installing an air volume adjusting valve on the smoke pipe; according to the corresponding relation of the air volume-power of the range hood, the motor power of the range hood is adjusted by adjusting the valve opening of an air volume adjusting valve, the power points of the range hood are controlled to be in one-to-one correspondence with the power points on an air volume-power curve, and then the working noise of the range hood is measured; step three: and drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the working noise data obtained by the test. All working states of the cigarette machine are covered, so that the noise data can better fit the actual experience of a user, and the development work can be better guided.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a range hood noise detection method.
Background
In the prior art, the method for testing the working noise of the range hood comprises the following steps: the intersection point of the fitted smoke discharge resistance curve and the range hood P-Q curve (power-air volume) is used as a working point of the range hood, and the overall dimensions of a smoke pipe connected with the range hood and a fixed air pipe are designed based on the working point. However, the smoke discharge resistance curve obtained by fitting is a simple quadratic curve, the resistance conditions of different smoke machines and different working points cannot be completely reflected, and if the sizes of the smoke pipe and the fixed air pipe are determined, the working noise of the smoke machine at the working point can only be tested.
However, when the range hood is actually installed and used, the actual use environment of a user is mainly divided into a low-rise building without a common flue and a high-rise residence with the common flue, wherein the backpressure of the low-rise building is small, the operation rate of the high-rise building is different from that of the range hood of the whole building along with the change of the floors, and the backpressure change is very large. The table below shows the actual measurement of the backpressure change of the range hood on different floors of a certain commodity building
Therefore, the existing testing method cannot reflect the real user experience at different working points.
In addition, when measuring noises at different working points, the method can only be operated by a measuring method provided by national standard GBT17713-2011, namely, an air volume testing device is connected to the tail end of the smoke tube, and the change of the air volume and the static pressure is controlled by replacing the orifice plate. The air quantity of the range hood is controlled by using the national standard air quantity equipment, although the operation is feasible, the pore plate replacement of the air quantity equipment is troublesome, and the air quantity equipment can occupy larger space and influence the noise of the range hood.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a noise detection method of a range hood, which covers all working states of the range hood and has noise data more fitting the actual experience of a user.
In order to achieve the purpose, the invention adopts the following technical scheme.
A method for detecting noise of a range hood is characterized by comprising the following steps: the method comprises the following steps: acquiring air performance data of the range hood and drawing an air volume-static pressure curve and an air volume-power curve; step two: installing a range hood and noise testing equipment positioned at the test point, installing a smoke pipe of the range hood, and installing an air volume adjusting valve on the smoke pipe; according to the corresponding relation of the air volume and the power of the range hood, the motor power of the range hood is adjusted by adjusting the valve opening of an air volume adjusting valve, the power points of the range hood are controlled to be in one-to-one correspondence with the power points on an air volume-power curve, and then the working noise of the range hood is measured; step three: and drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the working noise data obtained by the test.
More preferably, in the step one, the range hood air performance data is obtained by measurement according to a measurement method provided by national standard GBT 17713-2011.
More preferably, during testing, the range hood is installed in a simulated kitchen, and the simulated kitchen is a closed semi-anechoic chamber.
More preferably, the test point of the noise test device is located at a position 1.5m away from the ground, 0.7m away from the suspension wall surface of the range hood and corresponding to the center line of the range hood.
More preferably, the air volume adjusting valve includes: the valve comprises a valve body, a blade rod which is rotatably connected with the valve body, and a blade which is arranged on the blade rod and is used for adjusting the air quantity of the valve body in the valve body, wherein the blade rod is connected with a driving mechanism which is used for driving the blade rod to rotate.
More preferably, the driving mechanism is a handle connected to the blade lever, the handle including a handle upper leaf and a handle lower leaf combined together, a handle spring provided at the handle upper leaf and the handle lower leaf, and a spring pin for fixing the handle spring.
More preferably, the actuating mechanism is connected with a limiting mechanism, and the limiting mechanism comprises a flange fixedly arranged on the valve main body, a sleeve connected with the flange, and a limiting disc arranged on the sleeve and matched with the actuating mechanism.
More preferably, the air volume adjusting valve includes: the valve comprises a valve main body, an installation rod arranged in the valve main body, a conical valve core arranged on the installation rod in a sliding manner, and a driving mechanism driving the conical valve core to slide.
More preferably, the drive mechanism is an electric mechanism powered by an electric, pneumatic or hydraulic cylinder.
The invention has the beneficial effects.
Controlling the motor power of the range hood through an air volume adjusting valve, simulating different backpressure states according to the one-to-one correspondence relationship of air volume, static pressure and motor power, measuring noise data of different working points by combining corresponding noise testing equipment, further drawing a noise curve, covering all working states of the range hood, and better guiding development work; and the data in the method are all measured data, so that the problem of inaccurate fitted smoke discharge resistance curve is avoided, and the noise data is more fit for the actual experience of the user.
And secondly, by arranging the air volume adjusting valve with a specific structure, the air volume can be changed through a corresponding driving mechanism (a manual mechanism or an electric mechanism), an inserting plate does not need to be additionally replaced, and the air volume adjustment is quick, convenient and simple.
Drawings
Fig. 1 is a flow chart of a noise detection method for a range hood according to the present invention.
Fig. 2 is a schematic diagram of a simulated kitchen structure of the noise detection method of the range hood provided by the invention.
Fig. 3 is an exploded view of the air volume adjusting valve of the noise detection method of the range hood according to the present invention.
Fig. 4 is a side view of the air volume adjusting valve of the noise detection method of the range hood according to the present invention.
Fig. 5 is an exploded view of another embodiment of the air volume adjusting valve of the method for detecting noise in a range hood according to the present invention.
Fig. 6 is a structural diagram of another embodiment of the air volume adjusting valve of the method for detecting noise in a range hood according to the present invention.
Fig. 7 is a table showing the data of the air performance of the range hood tested in this embodiment.
FIG. 8 is a graph of air flow versus static pressure plotted from the data of FIG. 7.
FIG. 9 is a graph of wind volume versus power plotted against the data of FIG. 7.
Fig. 10 is a table showing the operating noise data of the range hood tested in this embodiment.
Fig. 11 is a graph showing the air volume-operating noise curve of the range hood tested in the present embodiment.
Fig. 12 is a graph showing the static pressure-operating noise curve of the range hood tested according to the present embodiment.
Fig. 13 is a graph showing the power-operating noise curve of the range hood tested in the present embodiment.
Reference numerals indicate the same.
1: range hood, 2: smoke tube, 3: test point, 4: an air volume adjusting valve.
41: valve body, 42: tobacco pipe connector, 43: blade, 44: blade bar, 45: flange, 46: sleeve, 47: spacing dish, 48: handle lower leaf, 49: handle spring, 410: spring pin, 411: handle upper leaf, 412: lock nut, 413: first locking bolt, 414: second lock bolt, 415: mounting rod, 416: a conical valve core.
Detailed Description
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present invention, unless otherwise specified and limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
As shown in fig. 1 and 2, a method for detecting noise of a range hood includes the following steps:
the method comprises the following steps: acquiring air performance data of the range hood and drawing an air volume-static pressure curve and an air volume-power curve; step two: installing a range hood 1 and noise testing equipment positioned at a test point 3, installing a smoke pipe 2 of the range hood, installing an air volume adjusting valve 4 on the smoke pipe 2, adjusting the motor power of the range hood by controlling the valve opening of the air volume adjusting valve 4 according to the air volume-power corresponding relation of the range hood, controlling the power points to be in one-to-one correspondence with the power points of an air volume-power curve, and testing the working noise of the range hood; step three: and drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the working noise data obtained by the test.
It should be noted that, during the test, the range hood 1 is installed in a simulated kitchen, and the simulated kitchen is a closed semi-anechoic chamber. The range hood 1 is hung on a wall surface and positioned right above a top of a kitchen range according to the requirements of the self-contained operating instruction. The test point 3 is located at a position which is 1.5m away from the ground, 0.7m away from the suspension wall surface of the range hood and corresponds to the central line of the range hood.
In the first step, the range hood air performance data is obtained by measurement according to a measurement method provided by national standard GBT 17713-2011. Obviously, the acquisition of the air performance data of the range hood may also be other methods which are known now or can be realized in the future, and is not limited to the embodiment.
Referring to fig. 3 and 4, the air volume adjusting valve includes: the air volume control valve comprises a valve main body 41, a blade rod 44 rotatably connected with the valve main body 41, a blade 43 which is arranged on the blade rod 44 and is arranged in the valve main body 1 and used for adjusting the air volume passing through the valve main body 1, a driving mechanism driving the blade rod 44 to rotate, and a limiting mechanism used for limiting the driving mechanism. The driving mechanism is a handle fixedly connected with the blade lever 44, and the handle comprises a handle upper leaf 411 and a handle lower leaf 48 which are combined together, a handle spring 49 which is arranged between the handle upper leaf 411 and the handle lower leaf 48, and a spring pin 410 for fixing the handle spring 49. The limiting mechanism comprises a flange 45 fixedly connected with the valve body 1 and a sleeve 46 connected with the flange 45, a limiting disc 47 is arranged at the tail end of the sleeve 46, the blade rod 44 penetrates through the flange 45 and the sleeve 46 and is connected with the handle, a plurality of through holes matched with the driving mechanism are formed in the limiting disc 47, and a limiting pin matched with the through holes is arranged on the upper blade of the handle. The upper leaf of the kneading handle is drawn close to the lower leaf of the handle to enable the limiting pin to be separated from the through hole, the handle can be rotated to drive the blade rod to rotate at the moment, and the upper leaf of the kneading handle is reset under the action of the handle spring to enter the limiting handle of the through hole after the handle is loosened. The handle and the blade lever are connected by a lock nut on which a first lock bolt 413 and a second lock bolt 414 are fitted.
The front end of the valve main body 41 is detachably provided with a smoke tube connector 42 for connecting the smoke tube 2, and different smoke tube connectors can be replaced according to the size of the smoke tube. Preferably, the smoke tube connector is in threaded connection or snap connection with the valve body, and it is obvious that those skilled in the art can adopt other connection modes according to actual needs, and the connection mode is not limited by the protection scope of the present invention.
In another embodiment, as shown in fig. 5 and 6, the air volume adjusting valve is a conical adjusting valve, and the conical adjusting valve includes: the valve body 41 with the channel is internally provided with an installation rod 415, a conical valve core 416 connected with the installation rod 415 in a sliding manner, and a driving mechanism driving the conical valve core to slide. The relative position of the conical valve core and the valve main body is adjusted to adjust the air quantity passing through the valve main body. Of course, those skilled in the art may change the driving mode of the air volume adjusting valve from manual to electric mechanism powered by electric, pneumatic or hydraulic cylinder instead of the manual air volume adjusting valve of the present embodiment, and is not limited to the present embodiment.
Particularly, the air volume adjusting valve 4 is arranged at the tail end of the smoke tube 2 and is fixed in a hole of a wall body. Obviously, according to different actual needs, the air volume adjusting valve may be installed in other installation manners, such as being installed on a wall through a fixing member, and is not limited to this embodiment.
The following describes an actual measurement example to make the technical scheme and the beneficial effects thereof more clear and definite.
Firstly, measuring by using national standard air quantity equipment to obtain the air performance data of the range hood shown in figure 7; drawing an air volume-static pressure curve as shown in figure 8 and an air volume-power curve as shown in figure 9 according to the air performance data of the range hood; installing a range hood and noise testing equipment of the test point according to the size requirement, adjusting the valve opening of an air volume adjusting valve according to the corresponding relation between the power of the range hood and the air volume static pressure to adjust the motor power of the range hood, testing the working noise of the range hood after controlling the power points to be in one-to-one correspondence with the power points of an air volume-power curve, and obtaining the corresponding relation between the working noise and the motor power as shown in figure 10; the operating noise-power curve, the operating noise-air volume curve and the operating noise-static pressure curve shown in fig. 11 to 13 are plotted according to the test data. Thereby better guiding the development work of the range hood.
It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (10)
1. A method for detecting noise of a range hood is characterized by comprising the following steps:
the method comprises the following steps: acquiring air performance data of the range hood and drawing an air volume-static pressure curve and an air volume-power curve;
step two: installing a range hood and noise testing equipment positioned at the test point, installing a smoke pipe of the range hood, and installing an air volume adjusting valve on the smoke pipe; according to the air volume-power corresponding relation of the range hood, the motor power of the range hood is adjusted by adjusting the valve opening of an air volume adjusting valve, the power points of the range hood are controlled to be in one-to-one correspondence with the power points on an air volume-power curve, and then the working noise of the range hood is measured;
step three: and drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the working noise data obtained by the test.
2. The method for detecting noise of a range hood according to claim 1, wherein in the first step, the air performance data of the range hood is obtained by measurement according to a measurement method provided by national standard GBT 17713-2011.
3. The method for detecting noise of a range hood according to claim 1 or 2, wherein the range hood is installed in a simulated kitchen during testing, and the simulated kitchen is a closed semi-anechoic chamber.
4. The method for detecting noise of a range hood according to claim 1, wherein the range hood is hung on a wall and positioned right above a top of a kitchen range according to the requirements of the operating instructions of the range hood when being installed.
5. The method for detecting noise of a range hood according to claim 1, wherein the test points of the noise test equipment are located at a distance of 1.5m from the ground and 0.7m from a suspended wall surface of the range hood and correspond to the center line of the range hood.
6. The method for detecting noise of a range hood according to claim 1, wherein the air volume adjusting valve comprises: the valve comprises a valve body, a blade rod which is rotatably connected with the valve body, and a blade which is arranged on the blade rod and is used for adjusting the air quantity of the valve body in the valve body, wherein the blade rod is connected with a driving mechanism which is used for driving the blade rod to rotate.
7. The method for detecting noise of a range hood according to claim 6, wherein the driving mechanism is a handle connected to the blade rod, the handle comprises an upper handle leaf and a lower handle leaf which are combined together, a handle spring arranged on the upper handle leaf and the lower handle leaf, and a spring pin for fixing the handle spring.
8. The method for detecting noise of a range hood according to claim 6, wherein the driving mechanism is connected with a limiting mechanism, and the limiting mechanism comprises a flange fixedly arranged on the valve body, a sleeve connected with the flange, and a limiting disc arranged on the sleeve and matched with the driving mechanism.
9. The method for detecting noise of a range hood according to claim 1, wherein the air volume adjusting valve comprises: the valve comprises a valve main body, an installation rod arranged in the valve main body, a conical valve core arranged on the installation rod in a sliding manner, and a driving mechanism driving the conical valve core to slide.
10. The method for detecting noise of a range hood according to claim 6 or 9, wherein the driving mechanism is an electric mechanism powered by an electric motor, an air cylinder or a hydraulic cylinder.
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| CN202110628230.2A CN113339861B (en) | 2021-06-04 | 2021-06-04 | Noise detection method for range hood |
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| CN202110628230.2A CN113339861B (en) | 2021-06-04 | 2021-06-04 | Noise detection method for range hood |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10325582A (en) * | 1997-05-22 | 1998-12-08 | Fuji Kogyo Corp | Range hood |
| CN1558192A (en) * | 2004-02-12 | 2004-12-29 | 梁嘉麟 | Establishment method of simple testing scheme for products noise equivalent to national standard requirements |
| CN104913355A (en) * | 2015-06-29 | 2015-09-16 | 珠海格力电器股份有限公司 | Noise treatment system, method and device of range hood |
| CN110397973A (en) * | 2019-08-20 | 2019-11-01 | 浙江惠厨节能科技有限公司 | A kind of novel air-valve assembling assembly |
| CN111043637A (en) * | 2020-01-02 | 2020-04-21 | 宁波方太厨具有限公司 | Intelligent adjusting method for noise of range hood |
| CN111207424A (en) * | 2018-11-21 | 2020-05-29 | 宁波方太厨具有限公司 | Control method of flow self-adaptive electric valve of range hood |
| CN112361404A (en) * | 2020-10-27 | 2021-02-12 | 宁波方太厨具有限公司 | Noise reduction method and system for range hood and range hood with noise reduction system |
| CN212868491U (en) * | 2020-07-11 | 2021-04-02 | 李义华 | Full-automatic smoke-discharging fire-proof valve |
| CN112610701A (en) * | 2020-12-11 | 2021-04-06 | 华帝股份有限公司 | Electric check valve capable of controlling rotation angle, smoke exhaust system and control method |
| CN112628813A (en) * | 2020-12-08 | 2021-04-09 | 华帝股份有限公司 | Centralized exhaust type range hood control system and air volume control method thereof |
-
2021
- 2021-06-04 CN CN202110628230.2A patent/CN113339861B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10325582A (en) * | 1997-05-22 | 1998-12-08 | Fuji Kogyo Corp | Range hood |
| CN1558192A (en) * | 2004-02-12 | 2004-12-29 | 梁嘉麟 | Establishment method of simple testing scheme for products noise equivalent to national standard requirements |
| CN104913355A (en) * | 2015-06-29 | 2015-09-16 | 珠海格力电器股份有限公司 | Noise treatment system, method and device of range hood |
| CN111207424A (en) * | 2018-11-21 | 2020-05-29 | 宁波方太厨具有限公司 | Control method of flow self-adaptive electric valve of range hood |
| CN110397973A (en) * | 2019-08-20 | 2019-11-01 | 浙江惠厨节能科技有限公司 | A kind of novel air-valve assembling assembly |
| CN111043637A (en) * | 2020-01-02 | 2020-04-21 | 宁波方太厨具有限公司 | Intelligent adjusting method for noise of range hood |
| CN212868491U (en) * | 2020-07-11 | 2021-04-02 | 李义华 | Full-automatic smoke-discharging fire-proof valve |
| CN112361404A (en) * | 2020-10-27 | 2021-02-12 | 宁波方太厨具有限公司 | Noise reduction method and system for range hood and range hood with noise reduction system |
| CN112628813A (en) * | 2020-12-08 | 2021-04-09 | 华帝股份有限公司 | Centralized exhaust type range hood control system and air volume control method thereof |
| CN112610701A (en) * | 2020-12-11 | 2021-04-06 | 华帝股份有限公司 | Electric check valve capable of controlling rotation angle, smoke exhaust system and control method |
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| CN113339861B (en) | 2023-12-12 |
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