CN215521405U

CN215521405U - Fan system capable of improving air-out efficiency and air purifier

Info

Publication number: CN215521405U
Application number: CN202121484254.7U
Authority: CN
Inventors: 汤文斌; 陈猛; 刘洪丽; 严东旭; 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 a fan system capable of improving air outlet efficiency and an air purifier, wherein the fan system comprises a backward centrifugal fan and a volute, 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, an air inlet is formed in the front cover plate, the tops of the front cover plate, the rear cover plate and the volute enclosing plate jointly enclose an air outlet, the backward centrifugal fan can be rotatably and eccentrically arranged in the volute, a resonance ring arranged around the air inlet is arranged on the inner side of the front cover plate, and the resonance ring encloses the air inlet of the backward centrifugal fan. According to the utility model, the resonance ring arranged around the air inlet is arranged on the inner side wall of the front cover plate, and the resonance ring surrounds the air inlet of the backward centrifugal fan, so that when air is thrown to the periphery of the volute by the impeller of the backward centrifugal fan, the air can smoothly flow to the air outlet, the problem that vortex is easily formed at the joint of the backward centrifugal fan and the front cover plate is effectively eliminated, and the air outlet efficiency is greatly improved.

Description

Fan system capable of improving air-out efficiency and air purifier

Technical Field

The utility model relates to the technical field of air purification, in particular to a fan system capable of improving air outlet efficiency and an air purifier.

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, after the backward centrifugal fan rotates, especially when rotating at a high speed, wind enters from an air inlet above the backward centrifugal fan, is thrown to the periphery of the volute through the impeller of the backward centrifugal fan, is emitted through the front cover plate and then easily enters the upper end of the impeller of the backward centrifugal fan to form a vortex, and the air outlet efficiency is greatly influenced.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the utility model is to provide a fan system capable of eliminating local eddy so as to improve air outlet efficiency, aiming at the current situation of the prior art.

The second technical problem to be solved by the present invention is to provide an air purifier applying the above fan system, aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving at least one technical problem is as follows:

the utility model provides a can improve fan system of air-out efficiency, includes backward centrifugal fan, still includes the spiral case, and this spiral case has front shroud, back shroud and connects the spiral case bounding wall between front shroud and back shroud, it has the income wind gap to open on the front shroud, synthetic air outlet is enclosed jointly at the top of front shroud, back shroud and spiral case bounding wall, backward centrifugal fan can rotate ground eccentric settings in the spiral case, the inboard of front shroud is provided with around the resonance ring that arranges of income wind gap, and this resonance ring will backward centrifugal fan's air intake surrounds wherein.

Preferably, an air inlet ring arranged along the circumferential direction is arranged at an air inlet of the backward centrifugal fan, and the edge of the air inlet of the front cover plate extends backwards and smoothly to form a guide ring which can be inserted into the inner edge of the air inlet ring. The resonant ring is sleeved on the periphery of the guide ring and surrounds the air inlet ring. The structure is beneficial to reducing the noise and the vortex generation at the air inlet.

Preferably, the resonant ring is provided with an annular inner cylinder and a guide sleeve positioned on the periphery of the inner cylinder, the rear edge of the guide sleeve is connected with the rear edge of the inner cylinder, and the guide sleeve extends outwards from back to front along the radial direction to form an arc-shaped flow guide surface. The structure is favorable for improving the guiding effect of airflow, avoids energy loss and keeps larger wind speed and wind pressure.

Preferably, the guide surface is provided with a plurality of guide vanes which are arranged at intervals along the circumferential direction, and each guide vane is obliquely arranged along the rotation direction of the backward centrifugal fan. This structure is advantageous for further improving the guiding effect of the air flow.

Preferably, the flow deflector is in a shuttle shape, the first end of the shuttle-shaped flow deflector is arranged close to the upper edge of the flow guiding surface, the second end of the shuttle-shaped flow deflector is arranged close to the lower edge of the flow guiding surface, and one arc-shaped edge of the shuttle-shaped flow deflector is matched and connected with the flow guiding surface. This structure is advantageous for further improving the guiding effect of the air flow.

Preferably, the distance between the front side wall of the backward centrifugal fan and the resonance ring is D, the diameter of the backward centrifugal fan is D, the distance between the rear side wall of the backward centrifugal fan and the rear cover plate is T, and then D is 0.02D + 0.5T, 10> T >1, 250> D > 0. Such design neither can form the scream because the fit clearance is too little, also can not cause the backward flow of part air because the fit clearance is too big simultaneously, and the concrete principle is: when the gap is smaller than 1mm, the wind thrown out from the impeller of the backward centrifugal fan enters the upper part of the impeller of the backward centrifugal fan through the small gap so as to form continuous squeaking sound; when the clearance is greater than 10mm, thereby wind will very easily enter into to centrifugal fan impeller top in the back thereby forms little vortex in the resonance ring, influences the air-out effect of fan.

The utility model provides an use air purifier who has above-mentioned fan system, includes the casing, it has the air inlet port to open on this casing diapire, the roof has the air-out port, fan system locates in the casing and the income wind gap arranges forward, the air outlet arranges up.

Compared with the prior art, the utility model has the advantages that: according to the utility model, the resonance ring arranged around the air inlet is arranged on the inner side wall of the front cover plate, and the resonance ring surrounds the air inlet of the backward centrifugal fan, so that when air is thrown to the periphery of the volute by the impeller of the backward centrifugal fan, the air can smoothly flow to the air outlet, the problem that vortex is easily formed at the joint of the backward centrifugal fan and the front cover plate is effectively eliminated, and the air outlet efficiency is greatly improved.

Drawings

FIG. 1 is a schematic structural diagram of a blower system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the back structure of FIG. 1;

FIG. 3 is a schematic structural diagram of a hidden rear cover plate of a fan system according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of FIG. 3;

fig. 6 is a schematic structural diagram 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. 1-5, the fan system for the air purifier of the present embodiment includes a backward centrifugal fan a and a volute b, the volute b has a front cover plate 1, a rear cover plate 2 and a volute casing plate 3 connected between the front cover plate 1 and the rear cover plate 2, an air inlet 11 is opened on the front cover plate 1, and the top of the front cover plate 1, the top of the rear cover plate 2 and the top of the volute casing plate 3 jointly enclose a synthetic air outlet 10. The backward centrifugal fan a is rotatably and eccentrically arranged in the volute b, the backward centrifugal fan a is fixed on the front side wall of the rear cover plate 2 through screws, and the air inlet a1 of the backward centrifugal fan a is arranged corresponding to the air inlet 11 of the volute b.

In the present embodiment, the inner side wall of the front cover plate 1 is provided with a resonance ring 4 disposed around the air inlet 11, and the resonance ring 4 surrounds the air inlet a1 of the backward centrifugal fan a.

Specifically, the air inlet a1 of the backward centrifugal fan a is provided with an air inlet ring a2 arranged along the circumferential direction, and the edge of the air inlet 11 of the front cover plate 1 extends backward smoothly to form a guide ring 12 which can be inserted into the inner edge of the air inlet ring a 2. The resonant ring 4 is sleeved on the periphery of the guide ring 12 and surrounds the air inlet ring a 2. This configuration is advantageous in reducing noise and vortex generation at the air inlet a 1.

The resonant ring 4 has an annular inner cylinder 41 and a guide sleeve 42 located at the periphery of the inner cylinder 41, the rear edge of the guide sleeve 42 is connected with the rear edge of the inner cylinder 41, and the guide sleeve 42 extends radially outward from the rear to the front to form an arc-shaped flow guide surface 421. The structure is favorable for improving the guiding effect of airflow, avoids energy loss and keeps larger wind speed and wind pressure. The guide surface 421 is provided with a plurality of guide vanes 422 arranged at intervals along the circumferential direction, and each guide vane 422 is arranged obliquely along the rotation direction of the backward centrifugal fan a. The flow deflector 422 is in a shuttle shape, the first end of the shuttle-shaped flow deflector 422 is arranged close to the upper edge of the flow guiding surface 421, the second end of the shuttle-shaped flow deflector 422 is arranged close to the lower edge of the flow guiding surface 421, and an arc-shaped edge of the shuttle-shaped flow deflector 422 is matched and connected with the flow guiding surface 421.

The distance between the front side wall of the backward centrifugal fan a and the resonance ring 4 is D, the diameter of the backward centrifugal fan a is D, the distance between the rear side wall of the backward centrifugal fan a and the rear cover plate 2 is T, and then D is 0.02D + 0.5T, 10> T >1, 250> D > 0. Such design neither can form the scream because the fit clearance is too little, also can not cause the backward flow of part air because the fit clearance is too big simultaneously, and the concrete principle is: when the gap is too small, the wind thrown out from the impeller of the backward centrifugal fan enters the upper part of the impeller of the backward centrifugal fan through the small gap so as to form continuous squeaking sound; when the clearance is too big, thereby wind will enter into very easily and form little vortex in the resonance ring to centrifugal fan impeller top in the back, influence the air-out effect of fan.

The air purifier of this embodiment includes casing 5, and it has air inlet port, roof to open on this 5 diapalls of casing has air outlet port 51, and the fan system is located in casing 5 and is gone into wind gap 11 and arrange forward, air outlet 10 arranges upwards. The casing 5 can also be provided with a formaldehyde removing module 52 covering the air inlet port and a filtering module 53 covering the air outlet port 51, so as to achieve good air purification 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 a can improve fan system of air-out efficiency, includes backward centrifugal fan (a), its characterized in that: the novel volute is characterized by further comprising a volute (b), wherein the volute (b) is provided with 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), an air inlet (11) is formed in the front cover plate (1), the rear cover plate (2) and the top of the volute enclosing plate (3) jointly enclose a synthetic air outlet (10), the backward centrifugal fan (a) can be eccentrically arranged in the volute (b) in a rotating mode, a resonance ring (4) arranged around the air inlet (11) is arranged on the inner side of the front cover plate (1), and the resonance ring (4) is used for surrounding the air inlet (a1) of the backward centrifugal fan (a).

2. The fan system capable of improving the air outlet efficiency according to claim 1, characterized in that: an air inlet ring (a2) arranged along the circumferential direction is arranged at an air inlet (a1) of the backward centrifugal fan (a), and the edge of an air inlet (11) of the front cover plate (1) extends backwards smoothly to form a guide ring (12) which can be inserted into the inner edge of the air inlet ring (a 2).

3. The fan system capable of improving the air outlet efficiency according to claim 2, characterized in that: the resonant ring (4) is sleeved on the periphery of the guide ring (12) and surrounds the air inlet ring (a 2).

4. The fan system capable of improving the air outlet efficiency according to claim 1, 2 or 3, characterized in that: the resonance ring (4) is provided with an annular inner cylinder (41) and a guide sleeve (42) positioned on the periphery of the inner cylinder (41), the rear edge of the guide sleeve (42) is connected with the rear edge of the inner cylinder (41), and the guide sleeve (42) extends outwards from the rear to the front in the radial direction to form an arc-shaped flow guide surface (421).

5. The fan system capable of improving the air outlet efficiency according to claim 4, characterized in that: the guide surface (421) is provided with a plurality of guide vanes (422) which are arranged at intervals along the circumferential direction, and each guide vane (422) is obliquely arranged along the rotating direction of the backward centrifugal fan (a).

6. The fan system capable of improving the air outlet efficiency according to claim 5, characterized in that: the flow deflector (422) is in a shuttle shape, the first end of the shuttle-shaped flow deflector (422) is arranged close to the upper edge of the flow guiding surface (421), the second end of the shuttle-shaped flow deflector is arranged close to the lower edge of the flow guiding surface (421), and one arc-shaped edge of the shuttle-shaped flow deflector (422) is matched and connected with the flow guiding surface (421).

7. The fan system capable of improving the air outlet efficiency according to claim 1, 2 or 3, characterized in that: the distance between the front side wall of the backward centrifugal fan (a) and the resonance ring (4) is D, the diameter of the backward centrifugal fan (a) is D, the distance between the rear side wall of the backward centrifugal fan (a) and the rear cover plate (2) is T, and then D is 0.02D + 0.5T, 10> T >1, 250> D > 0.

8. An air purifier who has any claim of claim 1 ~ 7 of fan system of application, includes casing (5), and it has air inlet port to open on this casing (5) diapire, has air outlet port (51) to open on the roof, its characterized in that: the fan system is arranged in the shell (5), the air inlet (11) is arranged forwards, and the air outlet (10) is arranged upwards.