CN110617538B - Noise reduction mechanism of integrated stove - Google Patents

Abstract

The invention relates to the technical field of integrated cookers. Aim at provides the mechanism of making an uproar falls in integrated kitchen that can effectual reduction noise pollution. The technical scheme adopted by the invention is as follows: a noise reduction mechanism of an integrated stove comprises a mounting plate and a plurality of noise reduction units arranged on the mounting plate; the noise reduction unit is arranged in the mounting hole and comprises a shell which is columnar, the front end of the shell is closed, the rear end of the shell is opened, a resonant cylinder is arranged in the shell, and a resonant cavity is formed in the resonant cylinder; the front end of the resonance cylinder is communicated with the rear end of the connecting pipe, and the front end of the connecting pipe extends to the front end surface of the shell and is communicated with the outside; and the resonance cylinder is provided with an airflow hole communicated with the inner cavity of the shell. The invention can effectively reduce the airflow noise of the smoke inlet of the integrated cooker and improve the kitchen environment.

Description

Noise reduction mechanism of integrated stove

The application is a divisional application, and the application date of the original application is as follows: 29/10/2018, with the application numbers: 201811271058.4 entitled "an integrated cooker with noise-proof function".

Technical Field

The invention relates to the technical field of integrated cookers, in particular to a noise reduction mechanism of an integrated cooker.

Background

The integrated cooker is a kitchen appliance integrating multiple functions of a range hood, a gas stove, a disinfection cabinet, a storage cabinet and the like, and has the advantages of space saving, good oil fume extraction effect, energy saving, low consumption, environmental protection and the like.

The integrated kitchen exhaust system generally comprises a hollow exhaust fume collecting hood arranged on the rear side of the top of a main body of the integrated kitchen, a fume inlet is arranged on the surface of the front side of the exhaust fume collecting hood, and the lower part of the exhaust fume collecting hood is communicated with a fan and an exhaust pipe in sequence through a fume conveying pipe. During the operation of the integrated cooker, the smoke exhaust system of the integrated cooker is a main part for generating noise, and during the process that airflow enters the smoke collecting hood from the smoke inlet, the smoke channel of the smoke inlet is a main source of the noise.

Wherein, because the air flow speed in the middle of the smoke inlet is fast and the air flow speed on the peripheral side is slow, vortex is easy to generate at the smoke inlet, thereby causing huge air flow noise. For this reason, the common practice in the prior art is: 1. the screen plate is arranged at the smoke inlet, the airflow is uniformly separated by the screen plate, the airflow is transferred to a high frequency spectrum in the process of passing through the holes on the screen plate, and audible noise is reduced. 2. The active noise reduction device is arranged at the smoke inlet, and the controller actively emits sound opposite to noise waves by using the loudspeaker through the noise collected by the noise collection module and offsets the noise. However, both of the above approaches have drawbacks: by adopting the first mode, the holes on the screen plate are too large, the frequency spectrum improvement effect of noise is poor, and the noise reduction effect is not ideal. Too small a hole will affect the smoking effect of the smoke evacuation system. And adopt the second mode, because the sound feedback information who gathers, except that the noise, still contain other complicated multiple noise, lead to loudspeaker can't be stable, accurate send corresponding sound wave, influence the noise reduction effect equally.

Disclosure of Invention

The invention aims to provide a noise reduction mechanism of an integrated stove, which can effectively reduce noise pollution.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a noise reduction mechanism of an integrated stove comprises a mounting plate and a plurality of noise reduction units arranged on the mounting plate; the noise reduction unit is arranged in the mounting hole and comprises a shell which is columnar, the front end of the shell is closed, the rear end of the shell is opened, a resonant cylinder is arranged in the shell, and a resonant cavity is formed in the resonant cylinder; the front end of the resonance cylinder is communicated with the rear end of the connecting pipe, and the front end of the connecting pipe extends to the front end surface of the shell and is communicated with the outside; the resonant cylinder is provided with an airflow hole communicated with the inner cavity of the shell; the mounting holes and the shell are both hexagonal prisms, and the mounting holes are densely arranged on the mounting plate in a honeycomb shape.

Preferably, the airflow holes are located on the front end surface of the resonance cylinder and are uniformly distributed in a ring shape around the connecting pipe.

Preferably, a circle of annular connecting edge is arranged on the circumferential surface of the rear end of the shell, and the connecting edge is connected with the mounting plate through a bolt.

The beneficial effects of the invention are concentrated and expressed as follows: the air flow noise of the smoke inlet of the integrated stove can be effectively reduced, and the kitchen environment is improved. Particularly, in the use process of the integrated kitchen range, after the smoke exhaust system of the integrated kitchen range is started, the oil smoke enters the smoke collecting hood through the noise reduction units in the mounting holes on the mounting plate, the oil smoke can uniformly and dispersedly enter the smoke collecting hood, the vortex phenomenon at the smoke inlet is weakened, and the noise generation amount is greatly reduced. When oil smoke flows through the noise reduction unit, the oil smoke enters the resonant cavity of the resonant cylinder through the connecting pipe, then enters the shell through the airflow hole, and finally enters the smoke collection hood through the rear end of the shell. Compared with the traditional method of improving the noise frequency spectrum by using the screen plate, the resonant cavity in the resonant cylinder is used as a buffering area for air intake, so that the effect of air storage can be achieved to a certain extent, and the air flow noise caused by the over-high air flow speed is reduced. Therefore, the noise generation amount of the present invention is smaller. On the basis, most of the generated high, medium and low-level noises are repeatedly reflected in the resonant cavity, the energy carried by the noises can be consumed through friction with the inner wall of the resonant cylinder, and the noises can be mutually dissipated, so that the effects of noise elimination and noise reduction are finally achieved. Compared with the traditional noise reduction mode, the invention has excellent noise reduction effect on low, medium and high noises with different frequencies, and the integrated stove can ensure high and stable noise reduction performance under different working conditions.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the mounting plate;

FIG. 3 is a view from direction A-A of the structure shown in FIG. 2;

FIG. 4 is a schematic perspective view of a noise reduction unit;

FIG. 5 is a schematic diagram of an internal structure of a noise reduction unit;

FIG. 6 is a schematic view of the structure shown in FIG. 5 in a use state;

FIG. 7 is a schematic perspective view of the adjustment barrel;

fig. 8 is a schematic structural view of the wall of a preferred resonating cylinder;

FIG. 9 is a view from direction B-B of the structure shown in FIG. 1;

fig. 10 is a schematic view of the installation of the rotation pin and nut.

Detailed Description

The noise-proof integrated cooker as shown in fig. 1-10 comprises an integrated cooker main body 1 and a hollow smoke collecting hood 2 arranged at the rear side of the top of the main body 1, wherein a burner, an internal integrated steam box, an oven and the like are arranged at the top of the main body 1. The front side of the fume collecting hood 2 is provided with a fume inlet 3, the fume inlet 3 and the inner cavity of the fume collecting hood 2 form a fume channel, namely the fume is generally routed to the fume inlet 3, the fume collecting hood 2, a fume conveying pipe, a fan, a fume exhaust pipe and a building flue. Compared with the traditional integrated kitchen range, the noise reduction mechanism is arranged at the smoke inlet 3 and used for reducing the noise at the smoke inlet 3 so as to purify the environment of the kitchen. It should be noted that before and after the following description, when the present invention is used normally, the front side is facing the user and the back side is facing the user.

As shown in fig. 2, the noise reduction mechanism of the present invention includes a mounting plate 4 and a plurality of noise reduction units 5 disposed on the mounting plate 4. The mounting plate 4 is matched with the smoke inlet 3 and is mounted in the smoke inlet 3, and the specific mounting structure is more and is described in detail below. A plurality of mounting holes 6 for mounting the noise reduction units 5 are formed in the mounting plate 4 corresponding to the noise reduction units 5, the mounting plate 4 is generally formed by mutually buckling a front panel and a back panel, a plurality of short pipes are erected between the front panel and the back panel, the mounting holes 6 are formed in inner cavities of the short pipes, and the short pipes are directly welded with the front panel or the back panel; and the front panel and the back panel are connected through bolts. The noise reduction unit 5 is arranged in the mounting hole 6, and when the fan is opened, the oil smoke passes through the noise reduction unit 5 which is arranged in the mounting hole 6 by a plurality of and is uniformly and stably fed into the smoke collection cover 2.

As shown in fig. 3 to 7, the noise reduction unit 5 includes a housing 7 having a cylindrical shape, a closed front end, and an open rear end. The shape and size of the housing 7 are matched with those of the mounting holes 6, and the number of the mounting holes 6 is increased under the same area of the mounting plate 4, so that the smoothness of smoking is improved. According to the invention, the mounting holes 6 and the shell 7 can be both in a hexagonal prism shape, and the mounting holes 6 are densely arranged on the mounting plate 4 in a honeycomb shape, so that the arrangement tightness of the mounting holes 6 can be ensured to the maximum extent, and the number of the noise reduction units 5 which can be mounted in a certain area on the mounting plate 4 is increased. Of course, it is also feasible to adopt matrix arrangement or other arrangement modes to arrange the mounting holes 6, and only the number of the mounting holes 6 is relatively less, and the smoking amount is relatively less, so that the smoke-absorbing device is suitable for occasions with relatively less oil smoke, such as western-style kitchens. In order to improve the stability of the noise reduction unit 5 installed in the installation hole 6, the circumferential surface of the rear end of the housing 7 is provided with a ring-shaped connecting edge 20, and the connecting edge 20 is connected with the installation plate 4 through a bolt. During installation, the shell 7 of the noise reduction unit 5 is penetrated through the rear end of the mounting hole 6, and after the main body part of the shell 7 is completely pushed in, the mounting plate 4 and the shell 7 are locked by using bolts.

A resonant cylinder 8 is arranged inside the housing 7, a resonant cavity is formed inside the resonant cylinder 8, and the resonant cylinder 8 has more specific shapes, such as: square cylinders, polygonal cylinders, etc., but generally take the form of cylinders. The front end of the resonance cylinder 8 is communicated with the rear end of a connecting pipe 9, and the front end of the connecting pipe 9 extends to the front end surface of the shell 7 and is communicated with the outside. The resonant cylinder 8 is provided with an airflow hole 10 communicated with the inner cavity of the shell 7, and the airflow hole 10 can be arranged on the peripheral surface, the rear end surface and other positions of the resonant cylinder 8 to play a role in communicating the inner cavity of the shell 7 with the resonant cavity. But in order to shorten the communication path as much as possible, the suction force of smoking is ensured. Preferably, the airflow holes 10 are located on the front end surface of the resonance cylinder 8 and are uniformly distributed in a ring shape around the connection tube 9.

In the use process of the integrated kitchen range, after a smoke exhaust system of the integrated kitchen range is started, oil smoke enters the smoke collecting hood 2 through the noise reduction units 5 in the mounting holes 6 on the mounting plate 4, the oil smoke can uniformly disperse and enter the smoke collecting hood 2, and compared with the traditional mode of large smoke inlet, the integrated kitchen range weakens the vortex phenomenon at the smoke inlet 3, and greatly reduces the noise generation amount. When oil smoke flows through the noise reduction unit 5, the oil smoke enters the resonant cavity of the resonant cylinder 8 through the connecting pipe 9, then enters the shell 7 through the airflow hole 10, and finally enters the smoke collection hood 2 through the rear end of the shell 7. Compared with the traditional method of improving the noise frequency spectrum by using the screen plate, the resonant cavity in the resonant cylinder 8 is used as a buffering area for air intake, so that the effect of air storage can be achieved to a certain extent, and the air flow noise caused by the over-high air flow speed can be reduced. Therefore, the noise generation amount of the present invention is smaller. On the basis, most of the generated high, medium and low-level noises are repeatedly reflected in the resonant cavity, the energy carried by the noises can be consumed through friction with the inner wall of the resonant cylinder 8, a plurality of noises with waveforms symmetrical to the source noises appear after the noise waves are continuously reflected, the noises and the source noises can mutually dissipate energy, and finally the effects of noise elimination and noise reduction are achieved. Compared with the traditional noise reduction mode, the invention has excellent noise reduction effect on low, medium and high noises with different frequencies, and the integrated stove can ensure high and stable noise reduction performance under different working conditions.

Of course, even if the present invention is provided with the resonance tank 8, it is inevitable that a small portion of the noise will propagate through the wall of the resonance tank 8 toward the outside. Therefore, the sound insulation performance of the resonator cylinder 8 itself should be improved as much as possible. The invention can be further improved, for example: the outer surface of the resonance cylinder 8 is provided with a sound insulation layer made of a porous material, such as sponge, foam plastic, etc., which is used to block the transmission of sound. Of course, it is also possible to provide a plurality of sound insulation holes 21 in the wall of the resonance box 8 as shown in fig. 8.

In the invention, because the size of the resonant cavity has certain influence on noise, the inventor researches 8 circular airflow holes 10 with the diameter of 4mm on the front end surface of a cylindrical resonant cylinder 8 with the diameter of 4 cm. The inventors found that, as the length of the resonator cylinder 8 increases, the volume of the resonator cavity also increases, and that the noise reduction effect is enhanced by about 60% with a double increase in the length of the resonator cylinder, but the smoke absorption performance is also reduced to a certain extent, and the reduction rate is about 15%. And because the fan of integrated kitchen adopts the frequency conversion fan usually, and the fan is equipped with a plurality of gears, when the oil smoke is great, the high-grade position high power operation of fan, 3 air current noises at smoke inlet this moment are very big, have very big demands to making an uproar to fall. When the oil smoke is small, the fan runs at low gear and low power, the noise of the airflow at the smoke inlet 3 is small, and the requirement for noise reduction is low. That is, when the fan operates at a high level, the length of the resonant cylinder 8 should be increased as much as possible to better meet the noise reduction requirement; when the fan operates at a low gear, the length of the resonance cylinder 8 should be reduced properly to meet the requirement of better smoking.

Therefore, as shown in fig. 5, in a more preferable mode of the present invention, the resonant cylinder 8 may be cylindrical, a rear end of the resonant cylinder 8 is open, an adjusting cylinder 11 with a closed front end and an open rear end is disposed in the resonant cylinder 8, a rear end of the resonant cylinder 8 is closed by a front end surface of the adjusting cylinder 11, and the adjusting cylinder 11 and the resonant cylinder 8 form a sliding fit. In other words, the rear end surface of the resonance cylinder 8 is formed by the front end surface of the adjustment cylinder 8, and the adjustment of the volume of the resonance cavity is performed by the sliding movement of the adjustment cylinder 11 in the resonance cylinder 8. When the fan power of the integrated stove becomes larger, the pressure difference between the two sides of the adjusting cylinder 11 becomes larger, and the adjusting cylinder 11 moves towards the rear end of the resonant cylinder 8 under the action of air pressure to enlarge the volume of the resonant cavity. When the fan power of the integrated stove is reduced, the pressure difference between the two sides of the adjusting cylinder 11 is reduced, and the adjusting cylinder 11 can overcome the influence of the pressure difference under the action of the resetting piece and move towards the front end of the resonant cylinder 8 so as to reduce the volume of the resonant cavity. In fact, the specific structure of the return element according to the invention is also very diverse, for example: the reset piece is a soft spring, two ends of the reset piece are respectively connected with the front end face of the resonance cylinder 8 and the front end face of the adjusting cylinder 11, when the fan runs at high power, the adjusting cylinder 11 moves towards the rear end under the action of pressure difference, when the fan runs at low power, the adjusting cylinder 11 moves the adjusting cylinder 11 to reset under the action of the elastic force of the soft spring, and therefore the volume of the resonance cavity is reduced.

Of course, the resetting member of the present invention may also be configured in such a manner that a circle of outwardly protruding first annular ribs 12 is disposed on the circumferential surface of the rear end of the resonance cylinder 8, a circle of outwardly protruding second annular ribs 13 is disposed on the circumferential surface of the rear end of the adjusting cylinder 11, and the first annular ribs 12 are opposite to the second annular ribs 13. The one side of second arris 13 towards first arris 12 evenly is provided with a plurality of guide bars 14, correspond guide bar 14 and be provided with a plurality of matched with guiding hole on the first arris 12. One end of the guide rod 14 is fixedly connected with the second annular ridge 13, and the other end of the guide rod passes through the guide hole and is provided with a stop head 15 at the end part. A return helical spring 16 is sleeved outside the guide rod 14 between the stopper 15 and the first annular rib 12, and the return element is the return helical spring 16. By such an arrangement, the adjustment cylinder 11 is more stable during movement.

In order to ensure the sealing between the adjusting cylinder 11 and the resonance cylinder 8 to form a better piston structure, a ring-shaped shoulder is arranged on the circumferential surface of the front end of the adjusting cylinder 11, a ring of rubber sealing ring 17 is sleeved at the shoulder, and the rubber sealing ring 17 is usually directly bonded and fixed with the shoulder.

In addition, the invention can be further improved, the inlet of the oil smoke firstly enters the front end of the connecting pipe 9, the pipe hole diameter of the front end of the connecting pipe 9 is about 3cm, and in this case, although the eddy noise is small, a certain noise exists all the time. Therefore, the connecting pipe 9 is also clamped with a silencing column 18 made of rubber, the center of the silencing column 18 is provided with a plurality of silencing holes 18-1 penetrating through two ends of the silencing column 18, the silencing holes 18-1 are distributed in a fan-blade shape, oil smoke flows are more dispersed when passing through the silencing holes 18-1, so that the air inflow on the section of the whole silencing column 18 is basically kept consistent, the vortex noise is eliminated, and the silencing effect of the invention is better. In order to conveniently take down the silencing column 18 for cleaning, the silencing column 18 is arranged in the connecting pipe 9 in a clamping mode without selecting fixed connection; in this case, in order to prevent the sound-deadening column 18 from falling into the resonance tube 8 along the connection pipe 9, it is preferable that a ring-shaped contact piece 19 is provided on the circumferential surface of the front end of the sound-deadening column 18, and the area of the contact piece 19 is larger than the diameter of the front end of the connection pipe 9, thereby functioning to limit the sound-deadening column 18.

The noise reduction mechanism of the present invention can be mounted in many specific ways, either by direct welding or by bolting. However, in order to facilitate the noise reduction mechanism to be quickly disassembled and assembled on the smoke collecting hood 2, the mounting plate 4 of the present invention is preferably detachably connected with the smoke inlet 3. As shown in fig. 9, the edge of the peripheral side of the smoke inlet 3 is bent inward to form a rib 22 having an L-shaped cross section, and the edge of the rear surface of the mounting plate 4 abuts against the rib 22. After the installation is in place, the front surface of the installation plate 4 and the front side surface of the smoke collecting cover 2 are positioned on the same plane. Therefore, the fixing of the fume collecting hood 2 can be realized by applying pressure to the front side surface of the fume collecting hood 2 and pressing the edge of the rear side surface of the fume collecting hood 2 on the flange 22.

For this reason, a plurality of fixing assemblies are further arranged on the periphery of the smoke inlet 3, each fixing assembly comprises a rotating pin 23 and a circular blocking piece 24 arranged at one end of the rotating pin 23, one end of the rotating pin 23 is welded with the eccentric position of the blocking piece 24, and the other end of the rotating pin 23 is arranged on the smoke collecting cover 2 and is in rotating fit with the smoke collecting cover 2. The rotating fit is formed in many ways, for example, a short sleeve is arranged on the smoke collecting hood 2 opposite to the rotating pin 23, the rotating pin 23 is matched with the short sleeve and is arranged in the short sleeve in a penetrating way, and in this case, the end part of the rotating pin 23 is usually provided with a head part for preventing the rotating pin 23 from being withdrawn from the short sleeve. Of course, it is also better to weld the nut 26 matched with the rotating pin 23 on the inner wall of the front side of the mounting plate 4 corresponding to the rotating pin 23, as shown in fig. 10. By forming the rotation fit in this way, the blocking piece 24 can also provide a pressure to the mounting plate 4 during the rotation of the rotation pin 23, so that the mounting plate 4 is more stably fixed and the mounting plate 4 is prevented from shaking. Further, a rubber pad 28 is disposed on a side of the rib 22 facing the mounting plate 4.

In the process of disassembling the mounting plate 4, the blocking piece 24 is firstly rotated to be deviated from the mounting plate 4, in order to rotate the blocking piece 24, a shifting block 27 is further arranged on one side, away from the rotating pin 23, of the surface of the blocking piece 24, and the blocking piece 24 can be rapidly rotated in a labor-saving manner by using the shifting block 27. Then take out mounting panel 4 from advancing in the mouth 3, in order to get the mounting panel 4 of taking, the both sides of mounting panel 4 leading flank still the symmetry be provided with two handles 25, during the operation handheld handle 25 can. After cleaning and maintenance are finished, the mounting plate 4 is firstly clamped into the smoke inlet 3 to be tightly attached to the flange 22, and then the baffle 24 is rotated back to the original position.

Claims (3)

1. The utility model provides a mechanism of making an uproar falls in integrated kitchen which characterized in that: comprises a mounting plate (4) and a plurality of noise reduction units (5) arranged on the mounting plate (4); the mounting plate (4) is matched with the smoke inlet (3), a plurality of mounting holes (6) are formed in the mounting plate (4) corresponding to the noise reduction units (5), the noise reduction units (5) are arranged in the mounting holes (6), each noise reduction unit (5) comprises a shell (7) which is columnar, the front end of each shell is closed, the rear end of each shell is opened, a resonant cylinder (8) is arranged in each shell (7), and a resonant cavity is formed in each resonant cylinder (8); the front end of the resonance cylinder (8) is communicated with the rear end of a connecting pipe (9), and the front end of the connecting pipe (9) extends to the front end surface of the shell (7) and is communicated with the outside; an airflow hole (10) communicated with the inner cavity of the shell (7) is formed in the resonant cylinder (8); the mounting holes (6) and the shell (7) are both hexagonal prisms, and the mounting holes (6) are densely arranged on the mounting plate (4) in a honeycomb shape.

2. The integrated cooker noise reduction mechanism according to claim 1, wherein: the airflow holes (10) are positioned on the front end surface of the resonance cylinder (8) and are uniformly distributed in an annular shape around the connecting pipe (9).

3. The integrated cooker noise reduction mechanism according to claim 2, wherein: the circumference of the rear end of the shell (7) is provided with a circle of annular connecting edge (20), and the connecting edge (20) is connected with the mounting plate (4) through bolts.

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