CN217604177U

CN217604177U - Noise testing device for range hood

Info

Publication number: CN217604177U
Application number: CN202122799216.7U
Authority: CN
Inventors: 艾穗江; 刘晗莹; 伏国鹏
Original assignee: Guangdong Macro Gas Appliance Co Ltd
Current assignee: Guangdong Macro Gas Appliance Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-10-18
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a range hood noise testing device, which adopts a simulation noise room of a closed semi-anechoic chamber, wherein the range hood is arranged in the closed semi-anechoic chamber, a test point is arranged in front of the range hood, and the range hood is connected to the wall body of the semi-anechoic chamber through a smoke tube; the air volume adjusting device comprises a plurality of fasteners fixed at the outer end part of the smoke tube, and adjusting pore plates used for discharging the smoke tube are fixed on the fasteners. The utility model has the advantages of can the actual measurement cigarette machine the performance curve, measure different operating point noise data, use air regulation device, adjust the amount of wind swift and simple and convenient, the test effect is accurate.

Description

Noise testing device for range hood

Technical Field

The utility model relates to a kitchen equipment technical field, concretely relates to range hood, especially its noise testing arrangement.

Background

In the prior art, a 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 a range hood P-Q curve (power-air volume) is used as a smoke machine working point, and the overall dimensions of a smoke pipe connected with the smoke machine 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.

In order to make the testing method and the testing device reflect the real user experience under different working points, the applicant applies for the invention patents of the noise detection method of the range hood with the application numbers of CN2021106282302, the application publication numbers of CN113339861A, the application dates of 2021.06.04 and the application publication dates of 2021.09.03, and the air volume adjusting valve adopted by the method comprises the following steps: the valve body, rotationally with the blade pole that the valve body is connected is established on the blade pole and arrange in the blade that is used for adjusting through the valve body amount of wind in the valve body drives blade pole pivoted actuating mechanism to and be used for spacingly actuating mechanism's stop gear. The driving mechanism is a handle fixedly connected with the blade rod, the handle comprises an upper handle leaf and a lower handle leaf which are combined together, a handle spring arranged between the upper handle leaf and the lower handle leaf, and a spring pin used for fixing the handle spring. The limiting mechanism comprises a flange fixedly connected with the valve main body and a sleeve connected with the flange, a limiting disc is arranged at the tail end of the sleeve, the blade rod penetrates through the flange and the sleeve connected with the handle, a plurality of through holes matched with the driving mechanism are formed in the limiting disc, and a limiting pin matched with the through holes is arranged on the upper leaf 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 rod are connected through a locking nut, and a first locking bolt and a second locking bolt are assembled on the locking nut.

Although the method can realize the real user experience at different working points, the simplicity and the accuracy of the test device are still to be improved.

The above description is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that all of the above are prior art.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a performance curve that can not only the actual measurement cigarette machine, measure different operating point noise data cover all operating condition of cigarette machine, use air regulation device moreover, adjust the swift and simple and convenient of amount of wind, range hood noise test device that test effect is accurate.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A noise testing device of a range hood is a noise simulating room adopting a closed semi-anechoic chamber, the range hood is arranged in the closed semi-anechoic chamber, a testing point is arranged in front of the range hood, the range hood is connected to a wall body of the semi-anechoic chamber through a smoke pipe, and the noise testing device is characterized in that the end part of the smoke pipe is fixed in a hole of the wall body of the semi-anechoic chamber through a flange, and an air volume adjusting device is arranged at the outer end part of the smoke pipe exposed out of the wall body.

As a further explanation of the scheme, the air volume adjusting device comprises a plurality of fasteners fixed at the outer end part of the smoke tube, and adjusting orifice plates used for discharging the smoke tube are fixed on the fasteners.

Furthermore, air regulation device includes that tobacco pipe interface extension pipe tip outer fringe sets up annular skirtboard, and the fastener setting is on annular skirtboard, and the fastener comprises the branch of fixing base in the middle and upper portion to both sides expenditure, is fixed with fastening rubber on the inboard branch, and the fastener passes through the fixed orifice plate of fastening rubber.

Further, the number of the fasteners is four, and the fasteners are arranged on the annular skirt board in an equal circumference mode; the fasteners are fixed on the annular skirt board through screws or riveting.

The beneficial effects of the utility model are that.

1. The air volume adjusting device is used for adjusting the air volume by replacing the pore plates with different apertures, different backpressure states are simulated, the air volume adjustment is rapid and simple, and the test result is accurate.

2. The noise data is more fit for the actual experience of a user, and the development work is better guided.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is the utility model discloses the positive sketch map of simulation noise room range hood installation dimension and test point position.

Fig. 2 is the utility model discloses simulation noise room range hood mounting dimension and test point position side schematic diagram.

Fig. 3 is the schematic view of the exploded structure of the air volume adjusting device of the present invention.

Fig. 4 is a front view of the air volume adjusting device of the present invention.

Fig. 5 is a left side view of the air volume adjusting device of the present invention.

Fig. 6 is a right side view of the air volume adjusting device of the present invention.

Fig. 7 is the utility model discloses an utilize national standard amount of wind equipment to measure and obtain range hood air performance data record table.

Fig. 8 is a curve of the air volume versus the static pressure of the present invention.

Fig. 9 is a curve of the air quantity-power of the present invention.

Fig. 10 is a table showing the correspondence between the operating noise and the motor power according to the present invention.

Fig. 11 is a curve of the air volume-noise of the present invention.

Fig. 12 is a static pressure-noise curve according to the present invention.

Fig. 13 is a power-noise curve of the present invention.

Wherein:

。

Detailed Description

The following further describes the embodiments of the present invention, so that the technical solution and the beneficial effects of the present invention are more clear and definite. The following described embodiments are exemplary, are intended to be illustrative of the present invention, and are not to be construed as limiting the invention.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

Examples are given.

As shown in fig. 1-2, the utility model discloses a range hood noise testing device, according to the dimensional requirement of fig. 1 and fig. 2, range hood 6 and test point 5 test equipment are installed. Then according to the corresponding relation between the motor power of the range hood and the air volume static pressure, the pore plates with different apertures are adjusted and replaced, the motor power of the range hood is controlled, and the control power points are in one-to-one correspondence with the power points of the air volume-power curve. And finally, drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the test data.

Fig. 1 and 2 are diagrams of installation size and test point position of a range hood of a simulated noise room. The simulation noise room adopts a closed semi-anechoic chamber 10, the semi-anechoic chamber 10 is 2500mm high and 3600mm wide, a range hood 6 is hung right above a hearth according to the installation size in the specification, an air volume adjusting device 8 is installed at the tail end of a smoke tube 7 and is fixed in a hole of a wall body by a flange 2, the installation height of the smoke tube is 2100mm, in the embodiment, a plurality of fixing screws 21 are arranged on the flange 2 and are fixed on the wall body by the fixing screws 21, and the air volume adjusting device 8 is arranged at the outer end of the smoke tube 7 exposed out of the wall body. The test point 5 is located 1.5m away from the ground and 0.7m away from the suspended wall surface.

Fig. 3 is an exploded view of the air quantity adjusting device (8) employed in the present invention; wherein, the smoke tube interface 1 is connected with the air quantity adjusting device 8, and different connectors can be replaced according to the size of the smoke tube; the air quantity adjusting device 8 comprises an annular skirt board arranged on the outer edge of the end part of an extending pipe of the smoke pipe connector 1, and a plurality of fasteners 3 are arranged on the annular skirt board; the fasteners 3 are fixed on the annular apron board through screws or riveting, in the embodiment, the number of the fasteners 3 is four, and the fasteners are arranged in an equal circumference manner; the fastener 3 consists of a fixed seat in the middle and supporting rods with the upper parts extending to two sides, fastening rubber 31 is fixed on the supporting rods on the inner sides, and the fixing screws 21 are used for fixing the flange 2 and the wall body; the fastener 3 fixes the orifice plate 4 through the fastening rubber 31, wherein the fastening rubber 31 can play a role in buffering, damping and increasing the fastening effect; the pore plate 4 is divided into different pore sizes, the pore diameters of the pore plate include 115mm, 110mm, 108mm, 105mm and 100mm, and the pore plate can be replaced according to requirements.

Fig. 4, 5 and 6 are front views, left and right views, respectively, of the air volume adjusting device (4) used. The air volume adjusting device fastening rubber 31 can play a role in buffering, shock absorption and increasing the fastening effect.

The test method of the present invention is disclosed in the applicant's prior application document and is not described in detail in this application.

Generally, the power of the motor of the range hood corresponds to the air volume and the static pressure one by one. Therefore, the air quantity can be adjusted by replacing the pore plates with different apertures, the running power of the motor of the range hood is observed, the corresponding relation between the noise of different working points and the air quantity and the static pressure is obtained, a curve can be drawn, the development work of the range hood is guided, and the noise optimization of the different working points is guided.

The following is an example of the measurement.

Firstly, the air performance data of the range hood is obtained by measuring with national standard air volume equipment, as shown in fig. 7.

And installing the range hood and the test point test equipment according to the size requirement. Then, according to the corresponding relationship between the power of the range hood and the static pressure of the air volume, the pore plates with different apertures are replaced to adjust the air volume, and the motor operation power of the range hood is observed, so that the control power points correspond to the power points of the air volume-power curve one by one, and the corresponding relationship between the working noise and the motor power is obtained, as shown in the direction of fig. 7.

Drawing a working noise-power curve, a working noise-air volume curve and a working noise-static pressure curve according to the test data, wherein the working noise-power curve, the working noise-air volume curve and the working noise-static pressure curve are shown in figures 8 and 9; the curve is obtained, so that the development work of the range hood is guided.

The power of the motor of the range hood is controlled through the air volume adjusting device, so that different back pressure states are simulated according to the one-to-one correspondence relationship between the air volume static pressure and the motor power, as shown in fig. 10, noise data of different working points can be measured, a noise curve is drawn, all working states of the range hood are covered, the noise data are more fit with the actual experience of a user, and development work is guided better. And the measured data in the method are actually measured data, so that the problem of inaccurate fitted smoke discharge resistance curve in a new national standard method is avoided.

The air quantity adjusting device is used, the air quantity is adjusted quickly, conveniently and accurately.

The utility model discloses a test principle is the corresponding relation according to the amount of wind static pressure and the motor power of most interchange cigarette machine, through air regulation device changes the orifice plate in different apertures, and control range hood motor power obtains the working noise and the amount of wind, the corresponding relation between static pressure and the motor power three.

The utility model discloses a measurement flow obtains range hood air performance data and draws amount of wind-static pressure curve, amount of wind-power curve for utilizing national standard amount of wind equipment to measure at first. And then according to the size requirements of the graph 1 and the graph 2, a range hood 6 and a test point 5 test device are installed, then pore plates with different pore diameters are replaced according to the corresponding relation between the power of the range hood and the static pressure of the air volume, the input power of the range hood is controlled, and the control power points correspond to the power points of the air volume-power curve one by one. And finally, drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the test data, as shown in fig. 11, 12 and 13.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those skilled in the art without departing from the scope of the present invention, the scope of which is to be determined by the terms of the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. A kind of cooker hood noise test device, it is the analog noise room to adopt enclosed semi-anechoic chamber, the cooker hood is set up in the enclosed semi-anechoic chamber, set up the test point in front of the cooker hood, the cooker hood is connected to the wall of semi-anechoic chamber through the tobacco pipe, characterized by that, the end of the tobacco pipe (7) is fixed in the wall hole of semi-anechoic chamber through the flange (2), the tobacco pipe (7) exposes the outer end of wall and has air regulation devices (8);

the air volume adjusting device (8) comprises a plurality of fasteners (3) fixed at the outer end of the smoke tube (7), and adjusting orifice plates (4) used for discharging the smoke tube (7) are fixed on the fasteners (3).

2. The range hood noise testing device according to claim 1, wherein the air volume adjusting device (8) comprises an annular skirt plate arranged on the outer edge of the end of the extending pipe of the smoke pipe joint (1), the fastening member (3) is arranged on the annular skirt plate, the fastening member (3) is composed of a middle fixed seat and a support rod with the upper part extending to two sides, fastening rubber (31) is fixed on the inner support rod, and the fastening member (3) is fixed on the pore plate (4) through the fastening rubber (31).

3. The range hood noise testing device of claim 2, wherein the pore plate (4) has different pore sizes, and the pore diameters of the pore plate include 115mm, 110mm, 108mm, 105mm and 100mm.

4. The range hood noise testing device of claim 2, wherein the number of the fasteners (3) is four, and the fasteners are arranged on the annular skirt board in an equal circumference mode.

5. The extractor hood noise testing device of claim 2 or 4, wherein the fastener (3) is fixed on the annular skirt board through a screw or rivet.

6. The range hood noise testing device of claim 1, wherein the flange (2) is provided with a plurality of fixing screws (21) and is fixed on a wall body through the fixing screws (21).

7. The range hood noise testing device of claim 1, wherein the test point (5) is located at a distance of 1.5m from the ground and 0.7m from the suspended wall surface.

8. The range hood noise testing device of claim 1, wherein the semi-anechoic chamber has a height of 2500mm, a width of 3600mm, and a smoke tube mounting height of 2100mm.