CN113339861B - Noise detection method for range hood - Google Patents
Noise detection method for range hood Download PDFInfo
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- CN113339861B CN113339861B CN202110628230.2A CN202110628230A CN113339861B CN 113339861 B CN113339861 B CN 113339861B CN 202110628230 A CN202110628230 A CN 202110628230A CN 113339861 B CN113339861 B CN 113339861B
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- range hood
- noise
- air quantity
- power
- valve
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- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000000779 smoke Substances 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 19
- 238000011161 development Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010998 test method Methods 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
- F24C15/2021—Arrangement or mounting of control or safety systems
Landscapes
- 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: step one: acquiring air performance data of the range hood and drawing an air quantity-static pressure curve, wherein the air quantity-power curve is formed; step two: installing a range hood and noise testing equipment positioned at a test point, and installing a smoke pipe of the range hood, wherein an air quantity regulating valve is arranged on the smoke pipe; according to the corresponding relation of the air quantity and the power of the range hood, the motor power of the range hood is regulated by regulating the valve opening of the air quantity regulating valve, and the working noise of the range hood is measured after the one-to-one correspondence between the power point of the range hood and the power point on the air quantity-power curve is controlled; step three: and drawing working noise-power, working noise-air quantity and working noise-static pressure curves according to the working noise data obtained by the test. And all working states of the smoke machine are covered, so that noise data is more fit with actual experience of a user, and development work is better guided.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a noise detection method of a range hood.
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 discharging resistance curve and the P-Q curve (power-air quantity) of the range hood is adopted as a working point of the range hood, and the outline 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 discharging 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 machines at the working points can be only 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 public flue and a high-rise residence with a public flue, wherein the back pressure of the low-rise building is smaller, the high-rise building is different from the range hood on probability of the whole building along with floor change, and the back pressure change is extremely large. The following table is used for actually measuring the back pressure change conditions of the range hood at different floors of a commodity building
。
Therefore, the existing test method cannot reflect the real experience of the user at different working points.
In addition, at present, when measuring noise of different working points, the measuring method provided by the national standard GBT17713-2011 can only be operated, namely, the tail end of the smoke tube is connected with an air quantity testing device, and the change of air quantity and static pressure is controlled by replacing an orifice plate. The national standard air volume equipment is used for controlling the air volume of the range hood, although the operation is feasible, the air volume equipment is troublesome to replace the pore plate, occupies larger space and affects 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 is used for covering all working states of the range hood and enabling noise data to be more fit with actual experience of a user.
In order to achieve the above purpose, the invention adopts the following technical scheme.
The noise detection method of the range hood is characterized by comprising the following steps of: step one: acquiring air performance data of the range hood and drawing an air quantity-static pressure curve, wherein the air quantity-power curve is formed; step two: installing a range hood and noise testing equipment positioned at a test point, and installing a smoke pipe of the range hood, wherein an air quantity regulating valve is arranged on the smoke pipe; according to the corresponding relation of air quantity and power of the range hood, the motor power of the range hood is regulated by regulating the valve opening of an air quantity regulating valve, and the working noise of the range hood is measured after the one-to-one correspondence between the power point of the range hood and the power point on an air quantity-power curve is controlled; step three: and drawing working noise-power, working noise-air quantity and working noise-static pressure curves according to the working noise data obtained by the test.
More preferably, in the first step, the air performance data of the range hood is obtained by measuring the air performance data by using a measuring method provided by national standard GBT 17713-2011.
More preferably, the range hood is installed in a simulated kitchen, which is a closed semi-anechoic chamber, during testing.
More preferably, the test point of the noise testing device is located at a position which is 1.5m away from the ground and 0.7m away from the hanging wall surface of the range hood and corresponds to the central line of the range hood.
More preferably, the air volume control valve includes: the valve body, with the rotatable blade pole of connecting of valve body install on the blade pole and be located be used for the blade of adjusting valve body through the amount of wind in the valve body be connected with on the blade pole be used for driving the actuating mechanism of blade pole pivoted.
More preferably, the driving mechanism is a handle connected to the blade bar, the handle includes a handle upper blade and a handle lower blade combined together, a handle spring provided on the handle upper blade and the handle lower blade, and a spring pin for fixing the handle spring.
More preferably, the driving 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 driving mechanism.
More preferably, the air volume control valve includes: the valve comprises a valve main body, a mounting rod arranged in the valve main body, a conical valve core slidably arranged on the mounting rod and a driving mechanism for driving the conical valve core to slide.
More preferably, the driving mechanism is an electric mechanism powered by an electric, air or hydraulic cylinder.
The invention has the beneficial effects that.
1. The motor power of the range hood is controlled through the air quantity regulating valve, so that different back pressure states are simulated according to the one-to-one correspondence relation of the air quantity, the static pressure and the motor power, noise data of different working points can be measured by combining corresponding noise testing equipment, a noise curve is drawn, all working states of the range hood are covered, and development work is guided better; in the method, the data are measured data, so that the problem that the fitted smoke discharge resistance curve is inaccurate is avoided, and the noise data are more fit with the actual experience of a user.
2. Through setting up the air quantity control valve of specific structure, can change the amount of wind through corresponding actuating mechanism (manual mechanism or electric mechanism), need not to change the picture peg in addition, air quantity control is swift and simple and convenient.
Drawings
Fig. 1 is a flowchart of a noise detection method of 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 quantity adjusting valve of the noise detecting method for the range hood.
Fig. 4 is a side view of an air quantity adjusting valve of the noise detecting method of the range hood.
Fig. 5 is an exploded view of another embodiment of an air quantity adjusting valve of the noise detecting method for a range hood according to the present invention.
Fig. 6 is a block diagram of another embodiment of an air quantity adjusting valve of the noise detecting method for a range hood according to the present invention.
Fig. 7 is a table showing the air performance data of the range hood tested in this example.
Fig. 8 shows a graph of air volume versus static pressure plotted against the data of fig. 7.
Fig. 9 shows a graph of air volume versus power plotted from the data of fig. 7.
Fig. 10 is a table showing the operating noise data of the range hood tested in this example.
Fig. 11 is a graph showing the air volume-working noise of the range hood tested in this example.
Fig. 12 is a graph showing static pressure-operating noise of the range hood tested in this example.
Fig. 13 is a graph showing the power-operating noise curve of the range hood tested in this example.
Reference numerals illustrate.
1: fume extractor, 2: smoke tube, 3: test point, 4: an air quantity adjusting valve.
41: valve body, 42: smoke tube connector, 43: blade, 44: blade lever, 45: flange, 46: sleeve, 47: limit plate, 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 bar, 416: a conical valve core.
Detailed Description
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than 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 simply indicating that the first feature is level below the second feature.
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and 2, a noise detection method of a range hood includes the following steps:
step one: acquiring air performance data of the range hood and drawing an air quantity-static pressure curve, wherein the air quantity-power curve is formed; step two: installing a range hood 1 and noise testing equipment positioned at a test point 3, installing a smoke tube 2 of the range hood, installing an air quantity adjusting valve 4 on the smoke tube 2, adjusting the power of a range hood motor by controlling the valve opening of the air quantity adjusting valve 4 according to the corresponding relation of the air quantity and the power of the range hood, controlling the one-to-one correspondence of power points and power points of an air quantity-power curve, and testing the working noise of the range hood; step three: and drawing working noise-power, working noise-air quantity and working noise-static pressure curves according to the working noise data obtained by the test.
During testing, 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 the wall surface and is positioned right above the top of the kitchen range according to the requirements of the self-contained use instruction. The test point 3 is positioned at a position which is 1.5m away from the ground and 0.7m away from the hanging wall surface of the range hood and corresponds to the central line of the range hood.
In the first step, the air performance data of the range hood is obtained by measuring the air performance data through a measuring method provided by national standard GBT 17713-2011. Obviously, the acquisition of the air performance data of the range hood can be other methods known in the prior art or realized in the future, and the method is not limited to the embodiment.
As shown in fig. 3 and 4, the air volume control valve includes: the valve comprises a valve body 41, a vane rod 44 rotatably connected with the valve body 41, a vane 43 arranged on the vane rod 44 and arranged in the valve body 1 and used for adjusting the air quantity passing through the valve body 1, a driving mechanism for driving the vane rod 44 to rotate, and a limiting mechanism 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 blade 411 and a handle lower blade 48 which are combined together, a handle spring 49 arranged between the handle upper blade 411 and the handle lower blade 48, and a spring pin 410 for fixing the handle spring 49. The limiting mechanism comprises a flange 45 fixedly connected with the valve main body 1, a sleeve 46 connected with the flange 45, a limiting disc 47 arranged at the tail end of the sleeve 46, a blade rod 44 penetrating through the flange 45 and the sleeve 46 and connected with the handle, a plurality of through holes matched with the driving mechanism arranged on the limiting disc 47, and limiting pins matched with the through holes arranged on the upper blade of the handle. The upper handle leaf is closed to the lower handle leaf by kneading, so that the limiting pin is separated from the through hole, the handle can be rotated to drive the blade rod to rotate at the moment, and the upper handle leaf is reset under the action of the handle spring to enter the through hole to limit the handle after the handle is loosened. The handle and the blade bar 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 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 pipe connector is in threaded connection or in snap connection with the valve main body, and obviously, other connection modes can be adopted by those skilled in the art according to actual needs, and the connection modes are not limiting the protection scope of the invention.
In another embodiment, as shown in fig. 5 and 6, the air quantity adjusting valve is a conical adjusting valve, and the conical adjusting valve includes: the valve body 41 with the channel is provided with a mounting rod 415 in the valve body, a conical valve core 416 in sliding connection with the mounting rod 415, and a driving mechanism for driving the conical valve core to slide. And adjusting the relative position of the conical valve core and the valve body to adjust the air quantity passing through the valve body. Of course, those skilled in the art may change the driving mode of the air volume control valve from manual operation to an electric mechanism powered by an electric, air or hydraulic cylinder, instead of the manual air volume control valve of the present embodiment, and is not limited to the present embodiment.
In particular, the air quantity regulating valve 4 is arranged at the tail end of the smoke tube 2 and is fixed in a wall hole. Obviously, according to different actual needs, the air quantity adjusting valve can be installed on a wall body in other modes, such as through a fixing piece, and the air quantity adjusting valve is not limited to the embodiment.
The following describes an actual measurement example to make the technical scheme and beneficial effects of the invention clearer and more definite.
Firstly, measuring by using national standard air volume equipment to obtain air performance data of the range hood shown in fig. 7; drawing an air quantity-static pressure curve shown in figure 8 and an air quantity-power curve shown in figure 9 according to the air performance data of the range hood; installing noise testing equipment of a range hood and a test point according to the size requirement, adjusting the valve opening of an air quantity adjusting valve according to the corresponding relation between the power of the range hood and the air quantity static pressure to adjust the power of a motor of the range hood, controlling the one-to-one correspondence between power points and air quantity-power curve power points, and then testing the working noise of the range hood to obtain the corresponding relation between the working noise and the power of the motor as shown in figure 10; and drawing working noise-power curves, working noise-air volume curves and working noise-static pressure curves shown in figures 11-13 according to the test data. Thereby better guiding the development work of the range hood.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (10)
1. The noise detection method of the range hood is characterized by comprising the following steps of:
step one: acquiring air performance data of the range hood and drawing an air quantity-static pressure curve, wherein the air quantity-power curve is formed;
step two: installing a range hood and noise testing equipment positioned at a test point, and installing a smoke pipe of the range hood, wherein an air quantity regulating valve is arranged on the smoke pipe; according to the corresponding relation of air quantity and power of the range hood, the motor power of the range hood is regulated by regulating the opening of a valve of an air quantity regulating valve, and the working noise of the range hood is measured after the one-to-one correspondence between the power point of the range hood and the power point on an air quantity-power curve is controlled;
step three: working noise-power, working noise-air quantity and working noise-static pressure curves are drawn according to the working noise data obtained through testing.
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 measuring by a measuring method provided by national standard GBT 17713-2011.
3. A method of detecting noise in a range hood according to claim 1 or 2, wherein the range hood is mounted in a simulated kitchen, the simulated kitchen being a closed semi-anechoic chamber, when tested.
4. The method for detecting noise of a range hood according to claim 1, wherein the range hood is hung on a wall surface and positioned right above a table top according to the self-contained instruction of the range hood when the range hood is installed.
5. The method for detecting noise of a range hood according to claim 1, wherein the test point of the noise testing device is located at a position 1.5m from the ground, 0.7m from the hanging wall surface of the range hood and corresponding to the center line of the range hood.
6. The noise detection method of a range hood according to claim 1, wherein the air quantity adjusting valve comprises: the valve body, with the rotatable blade pole of connecting of valve body install on the blade pole and be located be used for the blade of adjusting valve body through the amount of wind in the valve body be connected with on the blade pole be used for driving the actuating mechanism of blade pole pivoted.
7. The noise detecting method of a range hood according to claim 6, wherein the driving mechanism is a handle connected to the blade lever, the handle including a handle upper blade and a handle lower blade combined together, a handle spring provided at the handle upper blade and the handle lower blade, and a spring pin for fixing the handle spring.
8. The method of claim 6, wherein the driving mechanism is connected with a limiting mechanism, 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 driving mechanism.
9. The noise detection method of a range hood according to claim 1, wherein the air quantity adjusting valve comprises: the valve comprises a valve main body, a mounting rod arranged in the valve main body, a conical valve core slidably arranged on the mounting rod and a driving mechanism for driving the conical valve core to slide.
10. The method of claim 6 or 9, wherein the driving mechanism is an electric mechanism powered by an electric, air or hydraulic cylinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110628230.2A CN113339861B (en) | 2021-06-04 | 2021-06-04 | Noise detection method for range hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110628230.2A CN113339861B (en) | 2021-06-04 | 2021-06-04 | Noise detection method for range hood |
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| CN113339861A CN113339861A (en) | 2021-09-03 |
| CN113339861B true CN113339861B (en) | 2023-12-12 |
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|---|---|---|---|---|
| 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 | Range hood noise treatment system, method, and device |
| 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 | Range hood noise treatment system, method, and device |
| 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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| CN113339861A (en) | 2021-09-03 |
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Effective date of registration: 20231017 Address after: 528399 No. 9, Shunyuan South Road, Wusha community, Daliang street, Shunde District, Foshan City, Guangdong Province Applicant after: GUANGDONG MACRO GAS APPLIANCE Co.,Ltd. Applicant after: MACRO THERMAL ENERGY TECHNOLOGY Co.,Ltd. Address before: 528333 No. 9, Shunyuan South Road, Wusha community, Daliang street, Shunde District, Foshan City, Guangdong Province (residence declaration) Applicant before: GUANGDONG MACRO GAS APPLIANCE Co.,Ltd. |
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