CN215214114U

CN215214114U - Fan system with supercharging function and air purifier

Info

Publication number: CN215214114U
Application number: CN202120906184.3U
Authority: CN
Inventors: 陈猛; 陈德强; 汤文斌; 霍彦强; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-12-17
Anticipated expiration: 2031-04-28

Abstract

The utility model relates to a fan system and air purifier with pressure boost effect, the fan system includes back centrifugal fan, the spiral case has the front shroud, the back shroud and connect the spiral case bounding wall between front shroud and back shroud, back centrifugal fan can rotate ground eccentric settings in the spiral case, the position that is close to the centrifugal fan after apart from on the spiral case bounding wall is A, the position far away from the back centrifugal fan is B, be formed with on the front shroud from position A to position B along the inside sunken pressure intensifying structure gradually of the direction of rotation of back centrifugal fan. The utility model discloses can rotate ground eccentric settings in the spiral case with the back to centrifugal fan to set up on the front shroud from nearly position A to far away position B along the inside sunken pressure intensifying structure gradually to centrifugal fan's direction of rotation after, at the rotatory in-process of back to centrifugal fan, along with the air-out cross-section reduces gradually, under the condition of equal amount of wind, the pressure of production is bigger and bigger, thereby has effectively increased the air-out wind pressure.

Description

Fan system with supercharging function and air purifier

Technical Field

The utility model relates to an air purification technical field specifically indicates a fan system and air purifier with pressure boost 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 outlet pressure of the fan system with the structure is found to be increased, and the structure is required to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first technical problem that will solve is to prior art's current situation, provides a fan system that can effectively increase air-out wind pressure.

The utility model discloses the second technical problem that will solve is to prior art's current situation, provides an air purifier who uses there is above-mentioned fan system.

The utility model provides a technical scheme that at least one above-mentioned technical problem adopted does: a fan system with a supercharging function comprises a backward centrifugal fan and a volute, wherein 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, and 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 rotationally and eccentrically arranged in the volute, the position on the volute enclosing plate close to the backward centrifugal fan is A, the position on the volute enclosing plate far away from the backward centrifugal fan is B, and a pressurizing structure which gradually sinks inwards from the position A to the position B along the rotating direction of the backward centrifugal fan is formed on the front cover plate.

Preferably, the supercharging structure is spirally arranged on the front cover plate, two sides of the volute casing plate are respectively inwards recessed near the upper end to form volute tongues, and the tail end of the spiral supercharging structure is arranged near the volute tongues. The structure is beneficial to gradually increasing the pressure along the rotation direction of the backward centrifugal fan, and the dual effects of diversion and pressure increase are achieved.

Preferably, the pressurizing structure spirally decreases the distance between the front cover plate and the rear cover plate from the position a to the position B. This structure is favorable to producing the pressure boost effect, improves the air-out effect.

Preferably, an acute angle formed between the position B and the X axis is θ, a distance between the front cover plate and the rear cover plate at the position B is h, a distance between the front cover plate and the rear cover plate at the position a is L1, and a distance between the front wall surface of the backward centrifugal fan and the front cover plate at the position a is L2, then h is L1-L2 sin (3 θ/7), and θ is not less than 0 ° and not more than 210 °. Verification proves that when the parameters are adopted, a better supercharging effect is obtained.

In the above scheme, the volute tongue includes a first volute tongue disposed near the first end of the volute casing and a second volute tongue disposed near the second end of the volute casing, the first volute tongue and the second volute tongue are disposed opposite to each other, a pressurization region capable of pressurizing the outlet air is formed between the middle lower portion of the first volute tongue and the middle lower portion of the second volute tongue, and an air expansion region capable of guiding the outlet air direction and increasing the outlet air area is formed between the middle upper portion of the first volute tongue and the middle upper portion of the second volute tongue. The supercharging area can supercharge the outlet air, so that the efficiency of the fan is improved; the wind expanding area can guide the wind direction, and the wind outlet surface is enlarged, so that the wind outlet uniformity and stability are improved, and the wind outlet effect is improved.

Preferably, the backward centrifugal fan is arranged in the volute biased to the second volute tongue, and the rotation direction of the backward centrifugal fan is from the first volute tongue side to the second volute tongue side. This structure is favorable to improving the pressure boost effect to the air-out to further improve the effect of increase wind pressure, improve fan efficiency.

The utility model discloses in, the internal face of first volute tongue is the second arc surface that arches in to the spiral case for the internal face of first arc surface, the second volute tongue that arches in to the spiral case, along the gas flow direction, first arc surface, second arc surface all are located the low reaches to centrifugal fan.

As an improvement, the front cover plate is bent forwards from bottom to top at the position corresponding to the volute tongue to form an arc-shaped structure, and correspondingly, the rear cover plate is formed into an inclined plane structure which is gradually inclined forwards from bottom to top at the position corresponding to the volute tongue. Because the utility model discloses the air intake of back centrifugal fan is leading, adopts above-mentioned structure, not only be favorable to further improving the pressure boost effect with the eccentric arrangement mode of back centrifugal fan cooperatees, moreover to the change of air-out area, the effect of leading gradually of air-out direction better, be favorable to improving air-out stability.

Preferably, the volute casing enclosing plate vertically extends upwards from the top of the volute tongue, the top of the arc-shaped structure of the front cover plate vertically extends upwards, and the top of the inclined plane structure of the rear cover plate vertically extends upwards to jointly enclose a flow stabilizing area capable of enabling outlet air to stably flow. The structure can exhaust air to play a role in stabilizing the flow, and the stability of the air exhaust is further improved.

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. The casing can be further provided with a formaldehyde removal module covering the air inlet port and a filtering module covering the air outlet port, so that a good air purification effect is achieved.

Compared with the prior art, the utility model has the advantages of: the utility model discloses can rotate ground eccentric settings in the spiral case with the back to centrifugal fan to set up on the front shroud from nearly position A to far away position B along the inside sunken pressure intensifying structure gradually to centrifugal fan's direction of rotation after, at the rotatory in-process of back to centrifugal fan, along with the air-out cross-section reduces gradually, under the condition of equal amount of wind, the pressure of production is bigger and bigger, thereby has effectively increased the air-out wind pressure.

Drawings

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

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

fig. 4 is a schematic structural view of a front cover plate in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an air purifier according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1-4, 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 this embodiment, two sides of the volute enclosure plate 3 are respectively recessed near the upper end to form volute tongues capable of supercharging and guiding the outlet air. Specifically, the volute tongue comprises a first volute tongue 31 arranged close to the first end of the volute casing 3 and a second volute tongue 32 arranged close to the second end of the volute casing 3, as shown in fig. 1 and 2, the first volute tongue 31 and the second volute tongue 32 are arranged oppositely, a supercharging region 3a capable of supercharging the outlet air is formed between the middle lower part of the first volute tongue 31 and the middle lower part of the second volute tongue 32, and a wind expansion region 3b capable of guiding the outlet air direction and increasing the outlet air area is formed between the middle upper part of the first volute tongue 31 and the middle upper part of the second volute tongue 32. The supercharging area 3a can supercharge the outlet air, thereby improving the efficiency of the fan; the wind expanding area 3b can guide the wind direction, and the wind outlet surface is enlarged, so that the wind outlet uniformity and stability are improved, and the wind outlet effect is improved. The backward centrifugal fan a of the present embodiment is disposed in the volute b to be offset to the second volute tongue 32, and the rotational direction of the backward centrifugal fan a is from the first volute tongue 31 side to the second volute tongue 32 side. This structure is favorable to improving the pressure boost effect to the air-out to further improve the effect of increase wind pressure, improve fan efficiency.

The inner wall surface of the first volute tongue 31 is a first arc surface 311 arched towards the inside of the volute b, the inner wall surface of the second volute tongue 32 is a second arc surface 321 arched towards the inside of the volute b, and the first arc surface 311 and the second arc surface 321 are both positioned at the downstream of the backward centrifugal fan a along the gas flowing direction.

In the present embodiment, the front cover plate 1 is bent from bottom to top at the corresponding volute tongue to form an arc-shaped structure 13, and correspondingly, the rear cover plate 2 is formed with a slope structure 21 which is gradually inclined forwards from bottom to top at the corresponding volute tongue. Because this embodiment is leading to centrifugal fan a's air intake a1, adopt above-mentioned structure, not only be favorable to cooperating further improvement pressure boost effect with centrifugal fan a's behind eccentric arrangement mode, the effect of leading gradually to change, the air-out direction of air-out area is better in addition, is favorable to improving air-out stability. The volute casing enclosing plate 3 vertically extends upwards from the top of the volute tongue, the top of the arc-shaped structure 13 of the front cover plate 1 vertically extends upwards, and the top of the inclined surface structure 21 of the rear cover plate 2 vertically extends upwards to jointly enclose a flow stabilizing area 3c capable of enabling outlet air to stably flow. The structure can exhaust air to play a role in stabilizing the flow, and the stability of the air exhaust is further improved.

The position that is close to backward centrifugal fan a on the spiral case bounding wall 3 of this embodiment is A, the position far away from backward centrifugal fan a is B, is formed with on the front shroud 1 from position A to position B along the inside sunken pressure intensifying structure m of the direction of rotation of backward centrifugal fan a gradually. The supercharging structure m is spirally arranged on the front cover plate 1, and the tail end of the spiral supercharging structure m is arranged close to the first volute tongue 31. The structure is beneficial to gradually increasing the pressure along the rotation direction of the backward centrifugal fan, and the dual effects of diversion and pressure increase are achieved. The distance that pressure boost structure m made between front shroud 1 and the back shroud 2 reduces along the heliciform from position A to position B gradually, and this structure is favorable to producing the pressure boost effect, improves the air-out effect.

Specifically, an acute angle formed between the position B and the X axis is θ, a distance between the front cover plate 1 and the rear cover plate 2 at the position B is h, a distance between the front cover plate 1 and the rear cover plate 2 at the position a is L1, a distance between the front wall of the backward centrifugal fan a at the position a and the front cover plate 1 at the position a is L2, then h is L1-L2 sin (3 θ/7), and θ is not less than 0 ° and not more than 210 °. Verification proves that when the parameters are adopted, a better supercharging effect is obtained.

As shown in fig. 5, the air purifier of this embodiment includes a housing 5, an air inlet port is opened on the bottom wall of the housing 5, an air outlet port 51 is opened on the top wall, a blower system is disposed in the housing 5, an air inlet 11 is disposed forward, and an air outlet 10 is disposed upward. 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 present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Claims

1. A fan system with supercharging, comprising a backward centrifugal fan (a), characterized in that: the air conditioner 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), and the tops of the front cover plate (1), the rear cover plate (2) and the volute enclosing plate (3) jointly enclose an air outlet (10); the rear centrifugal fan (a) can be eccentrically and rotatably arranged in the volute (B), the position on the volute enclosing plate (3) close to the rear centrifugal fan (a) is A, the position on the volute enclosing plate (3) far away from the rear centrifugal fan (a) is B, and a pressurizing structure (m) which gradually sinks inwards from the position A to the position B along the rotating direction of the rear centrifugal fan (a) is formed on the front cover plate (1).

2. The blower system with supercharging of claim 1, wherein: the spiral pressurizing structure (m) is arranged on the front cover plate (1) in a spiral shape, two sides of the volute enclosing plate (3) are respectively inwards sunken at positions close to the upper end to form volute tongues, and the tail end of the spiral pressurizing structure (m) is arranged close to the volute tongues.

3. The blower system with supercharging of claim 1, wherein: the pressurizing structure (m) enables the distance between the front cover plate (1) and the rear cover plate (2) to be gradually reduced from the position A to the position B along a spiral shape.

4. The blower system with supercharging of claim 1, wherein: an acute angle formed between the position B and the X axis is theta, the distance between the front cover plate (1) and the rear cover plate (2) at the position B is h, the distance between the front cover plate (1) and the rear cover plate (2) at the position A is L1, the distance between the front wall surface of the backward centrifugal fan (a) and the front cover plate (1) at the position A is L2, then h is L1-L2 sin (3 theta/7), and theta is not less than 0 degrees and not more than 210 degrees.

5. The blower system with supercharging of claim 2, wherein: the volute tongue comprises a first volute tongue (31) and a second volute tongue (32), the first volute tongue (31) is arranged close to the first end of the volute casing plate (3), the second volute tongue (32) is arranged close to the second end of the volute casing plate (3), the first volute tongue (31) and the second volute tongue (32) are arranged oppositely, a supercharging area (3a) capable of supercharging the air outlet is formed between the middle lower portion of the first volute tongue (31) and the middle lower portion of the second volute tongue (32), and an air expansion area (3b) capable of guiding the air outlet direction and increasing the air outlet area is formed between the middle upper portion of the first volute tongue (31) and the middle upper portion of the second volute tongue (32).

6. The blower system with supercharging of claim 5, wherein: the backward centrifugal fan (a) is arranged in the volute (b) in a manner of deviating from the second volute tongue (32), and the rotating direction of the backward centrifugal fan (a) is from the first volute tongue (31) side to the second volute tongue (32) side.

7. The blower system with supercharging of claim 6, wherein: the inner wall surface of the first volute tongue (31) is a first arc surface (311) arched inwards the volute (b), the inner wall surface of the second volute tongue (32) is a second arc surface (321) arched inwards the volute (b), and the first arc surface (311) and the second arc surface (321) are both positioned at the downstream of the backward centrifugal fan (a) along the gas flowing direction.

8. The blower system with supercharging of claim 2, wherein: the front cover plate (1) is bent forwards from bottom to top at the position corresponding to the volute tongue to form an arc-shaped structure (13), and correspondingly, the rear cover plate (2) is bent forwards from bottom to top at the position corresponding to the volute tongue to form an inclined surface structure (21).

9. The blower system with supercharging of claim 8, wherein: the volute coaming (3) vertically extends upwards from the top of the volute tongue, the top of the arc-shaped structure (13) of the front cover plate (1) vertically extends upwards, and the top of the inclined plane structure (21) of the rear cover plate (2) vertically extends upwards to jointly enclose a flow stabilizing area (3c) capable of enabling air to stably flow.

10. An air purifier applying the fan system with supercharging function of any one of claims 1 to 9, comprising a housing (5), wherein the bottom wall of the housing (5) is provided with an air inlet port, and the top wall of the housing is provided with an air outlet port (51), and the air purifier is 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.