CN215523652U

CN215523652U - Air purifier

Info

Publication number: CN215523652U
Application number: CN202121479095.1U
Authority: CN
Inventors: 陈猛; 贾超; 倪晓龙; 霍彦强; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-01-14
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to an air purifier, which comprises a shell, a backward centrifugal fan and a volute, wherein the backward centrifugal fan and the volute are arranged in the shell, the volute is provided with a front cover plate, a rear cover plate and a volute enclosing plate connected between the front cover plate and the rear cover plate, the backward centrifugal fan can be rotatably and eccentrically arranged in the volute, the lower part of the rear side wall of the shell is provided with a fresh air port, the top of the rear side wall of the shell is provided with an air outlet, the rear cover plate is provided with an air inlet arranged close to the fresh air port, the tops of the front cover plate, the rear cover plate and the volute enclosing plate jointly enclose the air outlet, and the air inlet of the backward centrifugal fan faces the back and is arranged corresponding to the air inlet. The air inlet of the volute is arranged towards the back and close to the air suction opening, the air inlet of the backward centrifugal fan is arranged towards the back and corresponds to the air inlet, the fresh air stroke is greatly shortened, the fresh air smoothness is favorably improved, the noise generated by the backward centrifugal fan is transmitted towards the back through the air inlet and is far away from the user direction, and the noise is favorably reduced.

Description

Air purifier

Technical Field

The utility model relates to the technical field of air purification, in particular to an air purifier with a noise reduction effect.

Background

Centrifugal fans have been widely introduced for their advantages of large suction, low noise, compact structure, etc.

In the prior art, a backward centrifugal fan is widely applied to the field with higher requirements on acoustic quality. Chinese utility model patent application No. CN204961385U, entitled backward centrifugal fan impeller and centrifugal fan (application No. CN201520529599.8), discloses a structure comprising an impeller front disk, an impeller rear disk, and a plurality of blades between the impeller front disk and the impeller rear disk, wherein the backward centrifugal fan impeller further comprises a balance piece insertion groove distributed along the circumference of the inner ring of at least one of the impeller front disk and the impeller rear disk. The backward centrifugal fan impeller and the centrifugal fan provided with the impeller have low running noise, and are particularly suitable for equipment such as air purifiers.

Currently, with the continuous progress of aerodynamics, various fans are being developed to achieve higher efficiency, lower noise and higher acoustic quality by adopting more novel designs. However, when backward centrifugal fan was arranged in air purifier, generally not furnished with the spiral case, but directly with backward centrifugal fan in as to air purifier's casing, to backward centrifugal fan, efficiency and noise often are repellent, and the high efficiency will bring higher noise often, is difficult to satisfy the product needs of higher requirement. In addition, the air outlet to the centrifugal fan is not uniform enough, so that the air output of each part of the air outlet of the air purifier is unstable, and the using effect is influenced.

In order to solve the above problems, the applicant's prior application 202021026896.8 discloses a fan system, which includes a backward centrifugal fan and a volute, wherein the volute includes a front cover plate, a rear cover plate and a volute enclosure plate connected between the front cover plate and the rear cover plate, an air inlet is opened on the front cover plate, and the tops of the front cover plate, the rear cover plate and the volute enclosure plate together enclose an air outlet; the backward centrifugal fan can be eccentrically arranged in the volute in a rotating mode, the air inlet of the backward centrifugal fan is arranged corresponding to the air inlet of the volute, and two sides of the volute enclosing plate are respectively inwards sunken near the upper end to form a volute tongue capable of supercharging and guiding the outlet air. The fan system of above-mentioned structure can rotate ground eccentric settings in the spiral case to centrifugal fan behind to, the both sides of spiral case bounding wall are close to the inside spiral tongue that forms and can carry out pressure boost, water conservancy diversion in upper end department respectively to and after carrying out the pressure boost to centrifugal fan's air-out after, guide, the stationary flow to the air-out direction again, make the wind speed more stable, the air output is more even, thereby improves the air-out effect.

In practical application, the air purifier is found to have a longer fresh air path due to the fact that the fresh air inlet of the shell is located on the side wall and the air inlet of the fan system is arranged forwards, air inlet smoothness is affected, and noise generated by the fan system is transmitted forwards, so that the air purifier has a larger noise problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art and provides an air purifier which can improve the smoothness of fresh air and reduce noise.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides an air purifier, includes the casing, locates backward centrifugal fan and spiral case in this casing, the spiral case has front shroud, back shroud and connects the spiral case bounding wall between front shroud and back shroud, backward centrifugal fan can rotate ground eccentric settings in the spiral case, open the back lateral wall lower part of casing has fresh air inlet, top to open there is the air exit, it has the income wind gap of arranging near the fresh air inlet to open on the back shroud, synthetic air outlet is enclosed jointly at front shroud, back shroud and the top of spiral case bounding wall, the air intake of backward centrifugal fan is towards the back and corresponds the income wind gap and arranges.

Preferably, a baffle plate which is transversely arranged and is in contact with the inner wall of the shell is arranged on the rear wall surface of the rear cover plate, and the baffle plate, the rear cover plate and the inner wall of the shell jointly enclose an air suction area which surrounds the fresh air port. The new trend constraint that this structure will get into in the casing is in a less within range, has further shortened the stroke that the new trend got into fan system, is favorable to improving the new trend smoothness nature.

In the utility model, an indoor air inlet is formed in the bottom wall of the shell, a formaldehyde removing module covering the indoor air inlet is arranged in the shell, and the formaldehyde removing module is positioned below the air suction area and is arranged close to the lower edge of the fresh air inlet. Remove the formaldehyde module and be used for carrying out filtration treatment to indoor circulated air, the wind after the processing is under the regional restraint of induced drafting above it, and the circulation velocity of indoor wind is favorable to improving through the last row of fan system in shorter route, and then improves purifying effect.

In order to facilitate assembly, the backward centrifugal fan is constrained behind a front cover plate, and the front cover plate is fixed on the front side wall of the shell through screws.

Preferably, the air outlet covers the cross section of the inner cavity of the shell, and the upper part of the shell is provided with a filtering module capable of covering the air outlet. The filtering module can sterilize the air and filter fine dust in the air, and the structure is favorable for improving the filtering effect.

Compared with the prior art, the utility model has the advantages that: the novel air inlet is arranged on the rear side wall of the lower part of the shell, the air inlet of the volute is arranged towards the rear and is connected with the air suction opening, the air inlet of the backward centrifugal fan is arranged towards the rear and corresponds to the air inlet, the novel air stroke is greatly shortened, the novel air is favorable for improving the smoothness of the novel air, and the noise generated by the backward centrifugal fan is transmitted towards the rear through the air inlet and is far away from the direction of a user, so that the noise is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a backward centrifugal fan in an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

fig. 3 is a sectional view of an air purifier according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1-3, the air purifier of the embodiment includes a housing 5, a backward centrifugal fan a and a volute b arranged in the housing 5, the volute b has a front cover plate 1, a rear cover plate 2 and a volute enclosing plate 3 connected between the front cover plate 1 and the rear cover plate 2, and the backward centrifugal fan a can be rotatably and eccentrically arranged in the volute b.

The lower part of the rear side wall of the casing 5 of this embodiment is provided with a fresh air inlet 51, the top of the casing is provided with an air outlet 52, the rear cover plate 2 is provided with an air inlet 21 arranged close to the fresh air inlet 51, the front cover plate 1, the rear cover plate 2 and the top of the volute enclosing plate 3 jointly enclose an air outlet 10 of the backward centrifugal fan a, and an air inlet a1 of the backward centrifugal fan a is arranged backward and corresponding to the air inlet 21.

Above-mentioned structure has shortened the new trend stroke greatly, is favorable to improving new trend smoothness nature, and the noise that produces to centrifugal fan a propagates towards the back through air intake a1, keeps away from the user direction, is favorable to the noise reduction.

The rear wall of the rear cover plate 2 is provided with a baffle plate 22 which is transversely arranged and contacts with the inner wall of the shell 5, and the baffle plate 22, the rear cover plate 2 and the inner wall of the shell 5 jointly enclose a suction area 50 which surrounds a fresh air port 51. The new trend constraint that this structure will get into in the casing 5 is in a less within range, has further shortened the stroke that the new trend got into fan system, is favorable to improving the new trend smoothness nature.

In this embodiment, the bottom wall of the casing 5 is opened with an indoor air inlet 53, the casing 5 is provided with a formaldehyde removing module 4 covering the indoor air inlet 53, and the formaldehyde removing module 4 is located below the air suction area 50 and is arranged near the lower edge of the fresh air inlet 51. Remove formaldehyde module 4 and be used for carrying out filtration treatment to indoor circulated air, the wind after the processing is under the restraint of the regional 50 that induced drafts above it, and the fan system row of process is favorable to improving the circulating speed of indoor wind, and then improves purifying effect through shorter route.

For the convenience of assembly, the backward centrifugal fan a is restrained behind the front cover plate 1 by screws, and the front cover plate 1 is fixed on the front side wall of the housing 5 by screws.

The air outlet 10 covers the cross section of the inner cavity of the shell 5, and the upper part of the shell 5 is provided with a filter module 6 capable of covering the air outlet 10. The filtering module 6 can sterilize the air and filter fine dust in the air, and the structure is favorable for improving the filtering effect.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims

1. The utility model provides an air purifier, includes casing (5), locates backward centrifugal fan (a) and spiral case (b) in this casing (5), spiral case (b) have front shroud (1), back shroud (2) and connect spiral case bounding wall (3) between front shroud (1) and back shroud (2), backward centrifugal fan (a) can rotate ground eccentric settings in spiral case (b), its characterized in that: the novel air inlet (51) is formed in the lower portion of the rear side wall of the shell (5), the air outlet (52) is formed in the top of the rear side wall, an air inlet (21) which is close to the novel air inlet (51) is formed in the rear cover plate (2), the air outlet (10) is formed by the front cover plate (1), the rear cover plate (2) and the top of the volute enclosing plate (3) in a surrounding mode, and the air inlet (a1) of the backward centrifugal fan (a) faces backward and is arranged corresponding to the air inlet (21).

2. The air purifier of claim 1, wherein: the rear wall surface of the rear cover plate (2) is provided with a baffle plate (22) which is transversely arranged and is in contact with the inner wall of the shell (5), and the baffle plate (22) and the inner side walls of the rear cover plate (2) and the shell (5) jointly enclose an air suction area (50) which surrounds a fresh air inlet (51).

3. The air purifier of claim 2, wherein: open on casing (5) diapire and have indoor income wind gap (53), be provided with in casing (5) and cover and remove formaldehyde module (4) above indoor income wind gap (53), and should remove formaldehyde module (4) and be located the below of induced draft region (50), be close to fresh air inlet (51) lower limb and arrange.

4. An air cleaner according to claim 1, 2 or 3, wherein: the backward centrifugal fan (a) is restrained behind the front cover plate (1), and the front cover plate (1) is fixed on the front side wall of the shell (5) through screws.

5. An air cleaner according to claim 1, 2 or 3, wherein: the air outlet (10) covers the cross section of the inner cavity of the shell (5), and the upper part of the shell (5) is provided with a filtering module (6) capable of covering the air outlet (10).