CN214332819U

CN214332819U - Low-noise range hood

Info

Publication number: CN214332819U
Application number: CN202120201577.4U
Authority: CN
Inventors: 陈庆彩; 王宇; 常甜; 王亚琪
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-10-01
Anticipated expiration: 2031-01-25

Abstract

The utility model belongs to the technical field of smoke exhaust ventilator, and discloses a low-noise smoke exhaust ventilator, wherein a mounting plate, a fixed plate and a supporting plate are sequentially arranged in a smoke exhaust ventilator shell from top to bottom, and a centrifugal fan is arranged in the mounting plate and the fixed plate; the first buffer mechanism comprises a threaded rod, a first damping spring and a locking piece, the lower end of the threaded rod is fixed on the fixing plate, the upper end of the threaded rod penetrates through the mounting plate, and the first damping spring is sleeved on the threaded rod and is positioned between the mounting plate and the fixing plate; the second buffer gear includes fixture block, sleeve, movable rod and second damping spring, and the sleeve is fixed at the backup pad top, and movable rod one end is connected with the fixture block, and the other end stretches into in the sleeve and is connected with the slider, and second damping spring connects on the slider in the upper end, and the lower extreme is fixed at telescopic diapire, and the fixture block is connected with fixed cover. Through the setting of first buffer gear and second buffer gear, all played the cushioning effect on centrifugal fan's upper and lower vibrations and control the direction of shaking, reduced the noise.

Description

Low-noise range hood

Technical Field

The utility model belongs to the technical field of smoke ventilator, a low noise smoke ventilator is related to.

Background

For urban catering industry, concentrated and large-scale food cooking inevitably results in huge oil smoke discharge amount, causes serious pollution to the air environment of cities, and seriously troubles the daily life of urban residents. Therefore, the range hood is concerned as one of the first ways to effectively treat the oil fume pollution in the urban catering industry.

In recent years, the domestic range hood market mainly develops concepts of large air volume and large suction, and along with the gradual improvement of the air volume, the noise generated by the range hood is more and more increased. Once the mobile phone is opened, the user cannot hear the speaking sound, the telephone sound, the door bell sound and the like, the strong noise can even cause adverse reactions such as dysphoria, headache, palpitation and the like to kitchen operators, and the long-term use can cause serious influence on physical and psychological health. Therefore, the noise problem becomes the technical problem to be solved urgently in the existing range hood.

The existing range hood mainly comprises a range hood shell, a fan volute, a motor and a fan impeller, wherein the motor drives the fan impeller to rotate, the motor and the fan impeller are arranged in the fan volute, and the fan volute is arranged at the rear part of the range hood. When the fan is used, the motor drives the fan impeller to rotate to cause vibration, the shell generates resonance through the connection of the motor and the shell of the range hood, and noise is also generated by the friction impact of air flowing in the fan. Thus, the noise of the range hood mainly originates from two aspects: the noise generated by the fan itself and the noise generated by the airflow.

In the noise reduction process of the range hood, the structure of a suction system is improved, and sound absorption materials are arranged at positions which are easy to generate noise, so that the noise reduction mode is selected for most parts. Smoke ventilator on the existing market mostly utilizes to inhale the sound cotton and carries out the noise reduction, because inhale the sound cotton sound absorption effect limited, the noise reduction effect of use is not obvious to the bigger part of noise is the vibrations that derive from centrifugal fan in the use, current smoke ventilator lacks the means that reduces vibrations. Therefore, aiming at reducing the noise caused by the vibration,

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the utility model aims to provide a low-noise range hood solves the noise problem brought by the vibration of a centrifugal fan.

The utility model discloses a realize through following technical scheme:

a low-noise range hood comprises a range hood shell, a centrifugal fan, a first buffer mechanism and a second buffer mechanism;

the range hood is internally provided with an installation plate, a fixed plate and a supporting plate in sequence from top to bottom, installation holes are formed in the centers of the installation plate and the fixed plate, and a centrifugal fan is installed in the installation holes;

the first buffer mechanism comprises a threaded rod, a first damping spring and a locking piece, the lower end of the threaded rod is fixed on the fixing plate, the upper end of the threaded rod penetrates through the mounting plate, and the first damping spring is sleeved on the threaded rod and is positioned between the mounting plate and the fixing plate; the locking piece is connected to the top of the threaded rod;

the second buffer gear sets up in the centrifugal fan below, and second buffer gear includes fixture block, sleeve, movable rod and second damping spring, and the sleeve is fixed at the backup pad top, and movable rod one end is connected with the fixture block, and the other end stretches into in the sleeve and is connected with the slider, and second damping spring connects on the slider in the upper end, and the lower extreme is fixed at telescopic diapire, and the fixture block is connected with fixed cover.

Furthermore, a buffer cushion is arranged between the slide block and the inner top of the sleeve, and the buffer cushion is fixed on the movable rod.

Further, a sliding sleeve is arranged at the top of the sleeve and sleeved outside the movable rod.

Further, a fixed sleeve is sleeved outside the centrifugal fan, and a sound absorbing material is filled between the centrifugal fan and the fixed sleeve.

Furthermore, the sound absorption material adopts sound absorption cotton.

Furthermore, a plurality of filter screens are arranged on the supporting plate.

Furthermore, the first buffer mechanisms are distributed on the fixing plate in a circumferential array.

Furthermore, the locking piece adopts a locking nut.

Further, a smoke collecting hood is installed at the bottom of the smoke exhaust ventilator shell, a guide plate is installed inside the smoke collecting hood, a through hole is formed in the bottom of the guide plate, and an oil collecting box is installed below the through hole.

Further, a plasma generator is installed at the bottom of the support plate.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a low-noise smoke exhaust ventilator, which comprises a smoke exhaust ventilator shell, a centrifugal fan, a first buffer mechanism and a second buffer mechanism, the range hood is internally provided with an installation plate, a fixed plate and a supporting plate in sequence from top to bottom, a centrifugal fan is arranged on the installation plate and the fixed plate, a second buffer mechanism is arranged on the supporting plate and is positioned below the centrifugal fan, a first buffer mechanism is arranged at the periphery of the centrifugal fan, the first buffer mechanism comprises a threaded rod, a first damping spring and a locking piece, when in installation, the locking piece drives the mounting plate to downwards compress the first damping spring, after the fan is started, the first damping spring deforms to generate elastic force to reversely act on the mounting plate, vibration generated by external impact is effectively eliminated by utilizing relative motion of the fan and the spring, the mounting stability of the centrifugal fan in the fixing sleeve is improved, and noise generated by the centrifugal fan due to self vibration is further reduced; the second buffer mechanism comprises a clamping block, a sleeve, a movable rod and a second damping spring, when the centrifugal fan vibrates downwards, the force is applied to the clamping block, the movable rod downwards drives the sliding block to slide in the sleeve, and the second damping spring is compressed, so that the buffer effect is achieved, and the noise is reduced; through the setting of first buffer gear and second buffer gear, all played the cushioning effect to the shaking force on centrifugal fan's upper and lower vibrations and control the direction of shaking, reduced the noise.

Further, install the blotter between slider and telescopic interior top, the blotter is fixed on the movable rod, has effectively avoided the slider to take place the problem of repeated collision with telescopic interior top in the motion process, increases the life of relevant part, simultaneously in coordination first damping spring, the cushioning effect of second damping spring when using centrifugal fan.

Furthermore, a sound absorbing material is arranged between the centrifugal fan and the fixed sleeve and used for absorbing a small part of noise generated when the centrifugal fan works and aerodynamic noise generated by the flowing of the oil smoke in the flue.

Furthermore, the oil smoke is sucked into the shell of the range hood through the smoke collecting hood when the centrifugal fan works, the plasma generator emits negative ions to decompose the oil smoke and VOCs gas, and the decomposed smoke is discharged from the chimney along with the centrifugal fan without manual cleaning, so that the self-cleaning effect is achieved.

Drawings

Fig. 1 is a schematic structural view of a novel low-noise range hood of the present invention;

fig. 2 is a schematic structural view of a second buffer mechanism of the novel low-noise range hood of the present invention;

fig. 3 is the structural schematic diagram of the support plate of the novel low-noise range hood.

Wherein, 1 is the lampblack absorber casing, 2 is the fixed plate, 3 is the threaded rod, 4 is the mounting panel, 5 is first damping spring, 6 is lock nut, 7 is fixed cover, 8 is for inhaling the sound cotton, 9 is centrifugal fan, 10 is the backup pad, 11 is the filter screen, 12 is plasma generator, 13 is second buffer gear, 131 is the sleeve, 132 is the sliding sleeve, 133 is the movable rod, 134 is the slider, 135 is second damping spring, 136 is the fixture block, 14 is the collection petticoat pipe, 15 is the guide plate, 16 is the through-hole, 17 is the collection oil box.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings:

as shown in fig. 1-2, the utility model discloses a low-noise smoke exhaust ventilator, which comprises a smoke exhaust ventilator shell 1, a centrifugal fan 9, a first buffer mechanism and a second buffer mechanism 13; the range hood is characterized in that a mounting plate 4, a fixed plate 2 and a support plate 10 are sequentially mounted in a range hood shell 1 from top to bottom, mounting holes are formed in the centers of the mounting plate 4 and the fixed plate 2, and a centrifugal fan 9 is mounted in the mounting holes; the first buffer mechanism comprises a threaded rod 3, a first damping spring 5 and a locking piece, the lower end of the threaded rod 3 is fixed on the fixed plate 2, the upper end of the threaded rod penetrates through the mounting plate 4, and the first damping spring 5 is sleeved on the threaded rod 3 and is positioned between the mounting plate 4 and the fixed plate 2; the locking piece is connected to the top of the threaded rod 3; the second buffer mechanism 13 is disposed below the centrifugal fan 9, and specifically includes a fixture block 136, a sleeve 131, a movable rod 133 and a second damping spring 135, the sleeve 131 is fixed on the top of the support plate 10, one end of the movable rod 133 is connected with the fixture block 136, the other end of the movable rod 133 extends into the sleeve 131 and is connected with a slider 134, the upper end of the second damping spring 135 is connected to the slider 134, the lower end of the second damping spring is fixed on the bottom wall of the sleeve 131, and the fixture block 136 is connected with the fixed sleeve 7.

During installation, the locking member drives the mounting plate 4 downward and compresses the first damping spring 5. After the fan starts, the first damping spring 5 deforms and generates elastic force to act on the mounting plate 4 in a reverse mode, the relative motion of the fan and the spring is utilized, the stability of installation of the centrifugal fan 9 in the fixing sleeve 7 is improved, and then the noise generated by vibration of the centrifugal fan 9 is reduced. For the second buffer mechanism 13, when the centrifugal fan 9 vibrates downwards, the movable rod 133 moves downwards to drive the sliding block 134 to slide in the sleeve 131 to compress the second damping spring 135, so as to play a role in buffering and reduce noise. Through the setting of first buffer gear and second buffer gear 13, all played the cushioning effect to vibrations in centrifugal fan 9's upper and lower vibrations and control the direction of shaking to the noise has been reduced.

Preferably, a buffer pad is installed between the slider 134 and the inner top of the sleeve 131, and the buffer pad is fixed to the movable rod 133. Effectively avoided slider 134 in the motion process and the interior top of sleeve 131 to take place the problem of repeated collision, the life of increase relevant part, the cushioning effect of first damping spring 5, second damping spring 135 when simultaneously cooperating when using centrifugal fan 9.

Preferably, the sleeve 131 is provided at the top thereof with a sliding sleeve 132, and the sliding sleeve 132 is sleeved outside the movable rod 133.

Preferably, a fixing sleeve 7 is sleeved outside the centrifugal fan 9, and a sound-absorbing material is filled between the centrifugal fan 9 and the fixing sleeve 7, and the sound-absorbing cotton 8 can be adopted. The sound absorption cotton 8 can absorb a small part of noise generated when centrifugal wind works and aerodynamic noise generated by oil smoke flowing in the flue.

More preferably, as shown in fig. 3, a plurality of screens 11 for filtering the fumes sucked from the fume collecting hood 14 are provided on the support plate 10.

Generally, the locking piece can adopt a locking nut 6, and the structure is simple and the cost is low.

More preferably, as shown in fig. 1, a smoke collecting hood 14 is installed at the bottom of the range hood housing 1, a flow guide plate 15 is installed inside the smoke collecting hood 14, a through hole 16 is opened at the bottom of the flow guide plate 15, and an oil collecting box 17 is installed below the through hole 16. When the oil smoke collecting device is used, the centrifugal fan 9 is started, the centrifugal fan 9 works to suck oil smoke into the range hood shell 1 through the smoke collecting hood 14, and then part of oil drops formed by high-temperature liquefaction flow through the guide plate 15 and flow out from the through hole 16 in the bottom of the guide plate to be collected into the oil collecting box 17.

Preferably, a plasma generator 12 is installed at the bottom of the supporting plate 10, the plasma generator 12 emits negative ions to decompose the oil smoke and the VOCs gas, and the decomposed smoke is discharged from the chimney along with the centrifugal fan 9 without manual cleaning, so as to achieve the self-cleaning effect.

Fixed cover 7 adopts gliding mode to be connected with fixed plate 2, and first damping spring 5 moves from top to bottom along with the fan vibrations after the fan starts, for making damper can the full play effect, leaves certain space for fan and first damping spring 5 relative motion, and fixed cover 7 has a projection respectively with one side of fixed plate 2 contact, and fixed plate 2 with it contact has a recess, and the two adopts gliding mode to connect through the structure that coincide each other, is convenient for remove.

The fixed plate 2 is the ring structure, and the quantity of threaded rod 3 is a plurality of groups, and a plurality of groups of threaded rod 3 are located the top of fixed plate 2 and are the circumference array and distribute.

During the installation, at first cup joint mounting panel 4 on threaded rod 3, it is downward along the axial of threaded rod 3 to rotate lock nut 6 afterwards, lock nut 6 drives mounting panel 4 downwards and compresses first damping spring 5, the deformation of first damping spring 5 produces elasticity reverse action mounting panel 4, improve the stability of the centrifugal fan 9 installation in fixed cover 7, fixed cover 7 and fixture block 136 when the installation, fixture block 136 drives movable rod 133 and slides in sliding sleeve 132, movable rod 133 drives slider 134 and extrudees second damping spring 135 downwards, improve the stability of slider 134, second damping spring 135 and cushion improve the stability that slider 134 used, first damping spring 5 after the installation is accomplished, second damping spring 135 all produces great deformation, make centrifugal fan 9 install more stable, this device equipment finishes.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A low-noise range hood is characterized by comprising a range hood shell (1), a centrifugal fan (9), a first buffer mechanism and a second buffer mechanism (13);

the range hood is characterized in that a mounting plate (4), a fixed plate (2) and a support plate (10) are sequentially arranged in a range hood shell (1) from top to bottom, mounting holes are formed in the centers of the mounting plate (4) and the fixed plate (2), and a centrifugal fan (9) is arranged in the mounting holes;

the first buffer mechanism comprises a threaded rod (3), a first damping spring (5) and a locking piece, the lower end of the threaded rod (3) is fixed on the fixing plate (2), the upper end of the threaded rod penetrates through the mounting plate (4), the first damping spring (5) is sleeved on the threaded rod (3) and is positioned between the mounting plate (4) and the fixing plate (2), and the locking piece is connected to the top of the threaded rod (3);

second buffer gear (13) set up in centrifugal fan (9) below, second buffer gear (13) include fixture block (136), sleeve (131), movable rod (133) and second damping spring (135), sleeve (131) are fixed at backup pad (10) top, movable rod (133) one end is connected with fixture block (136), the other end stretches into in sleeve (131) and is connected with slider (134), second damping spring (135) upper end is connected on slider (134), the diapire at sleeve (131) is fixed to the lower extreme, fixture block (136) are connected with fixed cover (7).

2. A low noise exhaust hood according to claim 1, wherein a buffer pad is installed between the slider (134) and the inner top of the sleeve (131), and the buffer pad is fixed to the movable rod (133).

3. A low noise smoke exhaust ventilator according to claim 1 wherein the top of the sleeve (131) is provided with a sliding sleeve (132), the sliding sleeve (132) is sleeved outside the movable rod (133).

4. A low noise smoke exhaust ventilator according to claim 1, wherein a fixing cover (7) is sleeved outside the centrifugal fan (9), and a sound absorbing material is filled between the centrifugal fan (9) and the fixing cover (7).

5. A low noise smoke exhaust ventilator according to claim 1 wherein the sound absorbing material is sound absorbing cotton (8).

6. A low noise smoke exhaust ventilator according to claim 1 wherein a plurality of screens (11) are provided on the support plate (10).

7. A low noise range hood according to claim 1, wherein the first cushioning means are distributed in a circumferential array on the stationary plate (2).

8. A low noise smoke exhaust ventilator according to claim 1 wherein the locking means is a lock nut (6).

9. A low noise smoke exhaust ventilator according to claim 1 wherein a smoke collecting hood (14) is installed at the bottom of the smoke exhaust ventilator housing (1), a guide plate (15) is installed inside the smoke collecting hood (14), a through hole (16) is opened at the bottom of the guide plate (15), and an oil collecting box (17) is installed below the through hole (16).

10. A low noise exhaust hood according to any of claims 1 to 9, wherein a plasma generator (12) is installed at the bottom of the support plate (10).