CN113280403B

CN113280403B - Fan and air conditioner

Info

Publication number: CN113280403B
Application number: CN202110606937.3A
Authority: CN
Inventors: 王云亮
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2023-03-10
Anticipated expiration: 2041-05-31
Also published as: CN113280403A

Abstract

The invention discloses a fan and an air conditioner, wherein the fan comprises: the volute is provided with a plurality of wind wheel installation cavities which are arranged at intervals, each wind wheel installation cavity is respectively provided with two air inlets which are arranged oppositely, and the volute is also provided with an air outlet channel which is communicated with the plurality of wind wheel installation cavities; and the wind wheel assembly comprises a plurality of single-stage centrifugal wind wheels which are spaced from each other, the single-stage centrifugal wind wheels are connected through connecting pieces in sequence, and each wind wheel installation cavity is provided with one single-stage centrifugal wind wheel respectively. The wind wheel installation cavities are arranged at intervals, the single-stage centrifugal wind wheel is installed in each wind wheel installation cavity respectively, two air inlets are correspondingly arranged in each wind wheel installation cavity, each single-stage centrifugal wind wheel respectively enters air from two axial sides, the air inlet amount is increased, the air inlet uniformity is improved, air flow is discharged through the air outlet channel, the air flow can be output in a uniform state, and the air outlet uniformity is improved.

Description

Fan and air conditioner

Technical Field

The invention relates to the field of air conditioners, in particular to a fan and an air conditioner.

Background

In the prior art, an air inlet of a duct-type indoor unit is usually disposed at a lower portion or a rear portion, an air outlet is disposed at a front portion of an air conditioner, and indoor air enters the air conditioner from the air inlet and is blown to a heat exchanger under the action of a centrifugal fan. The heat exchange air is formed after the heat exchange of the heat exchanger, and the heat exchange air is blown out of the air outlet to the indoor. The wind wheel air-out tip of current air conditioner inside is roughly that both sides wind field is bigger, and middle wind field is compared both sides and is smaller, and simultaneously under high rotational speed, the air-out inhomogeneity is more obvious, and centrifugal wind wheel can not make full use of, influences the wind field evenly distributed of air outlet simultaneously, blows the heat exchanger after, influences the heat exchanger heat transfer ability.

Disclosure of Invention

The invention mainly aims to provide a fan and an air conditioner, and aims to solve the problem that the air outlet of the existing fan is uneven.

In order to achieve the above object, the present invention provides a fan, comprising:

the volute is provided with a plurality of wind wheel installation cavities which are arranged at intervals, each wind wheel installation cavity is respectively provided with two air inlets which are arranged oppositely, and the volute is also provided with an air outlet channel which is communicated with the plurality of wind wheel installation cavities; and

the wind wheel assembly comprises a plurality of single-stage centrifugal wind wheels which are spaced from each other, the single-stage centrifugal wind wheels are connected sequentially through connecting pieces, and each wind wheel installation cavity is provided with one single-stage centrifugal wind wheel.

Optionally, each wind wheel mounting cavity has a first air outlet, and the volute further comprises:

the air outlet shell is provided with a first air inlet which is correspondingly communicated with each first air outlet, the air outlet shell is also provided with a second air outlet, and an air outlet channel is formed between the first air inlet and the second air outlet.

Optionally, the volute further comprises:

the connecting plate is arranged between the adjacent first air outlets, a flow guide surface used for guiding the air flow close to the connecting plate to the air outlet channel is formed on the connecting plate, and the flow guide surface is arranged in a protruding mode towards the air outlet channel.

Optionally, the connecting plate is an arc plate with a middle portion protruding towards the air outlet channel, and the flow guide surface is a convex arc surface facing the air outlet channel;

the maximum chord length of the cambered surface of the inner periphery of the connecting plate is H ₄ The radius of the convex cambered surface where the flow guide surface is located is R, wherein R is less than or equal to 0.5H ₄ (ii) a And/or the distance between one end of the flow guide surface facing the air outlet channel and the second air outlet is not less than 15mm.

Optionally, the volute has a plurality of shells, each shell is respectively provided with the wind wheel installation cavity, each shell is respectively provided with the air inlet and the first air outlet which are communicated with the corresponding wind wheel installation cavity, the first air outlets of adjacent shells are respectively provided with an intermediate plate, and the connecting plate is connected with the shell through the intermediate plate;

when R =0.5H ₄ When the angle between the middle plates of the adjacent shells is B, wherein B =0 °.

Alternatively, when R < 0.5H ₄ While being adjacent to the shellThe included angle B between the middle plates of the body is less than 30 degrees.

Optionally, the volute has a plurality of shells, each shell is respectively formed with the wind wheel installation cavity, each shell is respectively formed with the air inlet and the first air outlet which are communicated with the corresponding wind wheel installation cavity, the first air outlet of the adjacent shell is respectively provided with a transition plate, one end of the transition plate, which is far away from the shell, is provided with a middle plate, and the connecting plate is connected with the transition plate through the middle plate;

the transition plate is perpendicular to the axial direction of the single-stage centrifugal wind wheel, wherein the length of the transition plate is not less than 5mm from the shell to the wind outlet shell.

Optionally, in the axial direction of the single-stage centrifugal wind wheel, a distance between the transition plate and an outer side end face of the air inlet of the housing on the same side of the transition plate is not more than 10mm, and is not less than 3mm.

Optionally, the volute casing has a plurality of casings, each casing is formed with respectively the wind wheel installation cavity, every be formed with respectively on the casing and communicate the correspondence the wind wheel installation cavity the air intake with first air outlet, single-stage centrifugal wind wheel's external diameter is D ₁ A gap between adjacent ones of the housings is not less than 0.3D ₁ 。

Optionally, rims are respectively arranged at two axial ends of the single-stage centrifugal wind wheel, blades are arranged between the rims, and the distance between the end surface of one side of the rim, which faces away from the blades, and the inner surface of the volute on the same side of the rim is not less than 4mm and not more than 6.5mm.

Optionally, the single-stage centrifugal wind wheel has an outer diameter D ₁ The axial length of the single-stage centrifugal wind wheel is H ₁ Wherein, 1/3D ₁ ≤H ₁ ≤2/3D ₁ 。

Optionally, the blades of the single-stage centrifugal wind wheel are staggered with each other along the axial direction of the single-stage centrifugal wind wheel.

Optionally, a plurality of said single-stage centrifugal wind wheels are arranged coaxially.

Optionally, in a projection of the wind wheel assembly on a plane perpendicular to the axial direction of the wind wheel assembly, the blades of the single-stage centrifugal wind wheel are arranged at equal intervals.

Optionally, the fan further comprises:

and the motor assembly is in driving connection with at least one single-stage centrifugal wind wheel so as to drive the single-stage centrifugal wind wheels to synchronously rotate.

The invention also provides an air conditioner which comprises the fan.

According to the technical scheme, a plurality of wind wheel installation cavities are arranged at intervals, a single-stage centrifugal wind wheel is installed in each wind wheel installation cavity respectively, two air inlets are correspondingly arranged in each wind wheel installation cavity, air is fed from two axial sides by each single-stage centrifugal wind wheel, the air inlet amount is increased, the air inlet uniformity is improved, air flow is uniformly discharged through an air outlet channel, the air flow can be uniformly output, and the air outlet uniformity is improved.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural diagram of an embodiment of the inner structure of the volute of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic structural view of an embodiment of the inside of the volute with the wind wheel assembly installed according to the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is an enlarged view of a portion of the area N in FIG. 6;

FIG. 8 is a schematic structural diagram of an embodiment of a connection plate and a housing according to the present invention;

FIG. 9 is a schematic structural diagram of another embodiment of the connection plate and the housing according to the present invention;

FIG. 10 is a front view of FIG. 5;

FIG. 11 is a schematic structural view of an embodiment of a wind wheel assembly of the present invention;

FIG. 12 is a top view of FIG. 11;

FIG. 13 is a left side view of FIG. 11;

FIG. 14 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;

FIG. 15 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 14;

FIG. 16 is a schematic structural diagram of an embodiment of an internal structure of an air conditioner according to the present invention;

fig. 17 is a top view of fig. 16.

The reference numbers indicate:

reference numerals	Name(s)	Reference numerals	Name (R)
				100	Air conditioner	110	Heat exchanger
20	Spiral casing	201	First shell
				202	Second shell	21	Wind wheel installation cavity
22	Air inlet	23	Air outlet channel
				24	Wind guide ring	25	Connecting plate
251	Intermediate plate	252	Transition plate
				26	Flow guide surface	27	First air outlet
28	Air outlet shell	281	First air inlet
				282	Second air outlet	30	Single-stage centrifugal wind wheel
301	First single-stage centrifugal wind wheel	302	Second single-stage centrifugal wind wheel
				31	Blade	40	Connecting piece
50	Motor assembly

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a blower which can be used in a home appliance such as an air conditioner 100, etc., for introducing an air flow and outputting the air flow as required. The fan is provided with a wind wheel component and a wind wheel mounting cavity 21 for mounting the wind wheel component, wherein the wind wheel mounting cavity 21 is provided with an air inlet 22 and a first air outlet 27 communicated with an air outlet channel 23 of the fan. When the wind wheel assembly rotates, the airflow enters the wind wheel installation cavity 21 from the air inlet 22, enters the air outlet channel 23 under the action of the wind wheel assembly, and is conveyed to the preset direction. For convenience of description, the fan will be described below as an example of the fan used in the air conditioner 100. Fig. 1 to 14 are corresponding drawings of an embodiment of the present invention.

Referring to fig. 1, 2 and 3, in an embodiment, the fan includes:

the volute 20 is provided with a plurality of wind wheel installation cavities 21 arranged at intervals, each wind wheel installation cavity 21 is respectively provided with two air inlets 22 arranged oppositely, and the volute 20 is further provided with an air outlet channel 23 communicated with the plurality of wind wheel installation cavities; the wind wheel installation cavity 21 is a hollow cavity formed in the volute casing 20, and the shape of the wind wheel installation cavity 21 corresponds to the shape of a wind wheel component to be installed. The two axial ends of the wind wheel installation cavity 21 are respectively provided with the air inlets 22, so that air flow can enter the wind wheel installation cavity 21 from the two axial ends of the wind wheel installation cavity 21. The air outlet channel 23 is communicated with the plurality of wind wheel installation cavities 21 so as to supply air flow to be output from the volute 20.

The wind wheel assembly comprises a plurality of single-stage centrifugal wind wheels 30 which are spaced from each other, the single-stage centrifugal wind wheels 30 are connected through connecting pieces 40 in sequence, and each wind wheel installation cavity 21 is provided with one single-stage centrifugal wind wheel 30. The single-stage centrifugal wind wheels 30 are arranged in one-to-one correspondence with the wind wheel installation cavities 21, and when each single-stage centrifugal wind wheel 30 rotates, airflow enters the wind wheel installation cavity 21 from the corresponding air inlet 22 and enters the air outlet channel 23 under the action of the single-stage centrifugal wind wheel 30.

The connecting member 40 is used for connecting adjacent single-stage centrifugal wind wheels 30, so that the single-stage centrifugal wind wheels 30 arranged at intervals can synchronously rotate, and synchronous driving is realized. The connecting piece 40 can be positioned between the adjacent single-stage centrifugal wind wheels 30 and does not block the air inlet of the adjacent single-stage centrifugal wind wheels 30.

Referring to fig. 4, 5 and 6, for convenience of description, the fan is provided with two rotor installation cavities 21, and a first single-stage centrifugal rotor 301 and a second single-stage centrifugal rotor 302 corresponding to the two rotor installation cavities 21. The volute 20 includes two shells, which are a first shell 201 and a second shell 202, respectively, and the two shells form a wind wheel installation cavity 21, respectively. A first single-stage centrifugal wind wheel 301 is installed in the wind wheel installation cavity 21 of the first shell 201, and a second single-stage centrifugal wind wheel 302 is installed in the wind wheel installation cavity 21 of the second shell 202. Two air inlets 22 are respectively arranged on two axial sides of the first shell 201 and the second shell 202, and two axial ends of the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 respectively correspond to the two air inlets 22, so that air can be fed from two axial sides of the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302.

As shown in fig. 3, the first casing 201 and the second casing 202 are arranged at an interval, and since the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 are connected by the connecting member 40, when the first single-stage centrifugal wind wheel 301 rotates, the second single-stage centrifugal wind wheel 302 can rotate synchronously. The first housing 201 and the second housing 202 respectively have a first air outlet 27 for air outlet, so that the air flow output from the wind wheel installation cavity 21 can enter the air outlet channel of the scroll casing 20. Because the first shell 201 and the second shell 202 are respectively provided with the two air inlets 22, when the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 operate, both sides of the first shell 201 and the second shell 202 can be used for air inlet, and thus the air inlet amount of the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 can be increased. Because the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 can intake air from both sides, the intake air volumes at both sides of the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 are relatively balanced, and the air flows output by the first air outlet 27 of the wind wheel installation cavity 21 corresponding to the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 are also relatively balanced. Because two wind wheel installation cavities 21 communicate same air-out passageway 23 respectively, the homogeneity of the air current of 23 output of air-out can promote, and then under the prerequisite that makes the amount of wind of fan output promote, the air-out homogeneity also improves. Due to the fact that the single-stage centrifugal wind wheel 30 is adopted, air can be simultaneously fed through two sides, the air outlet quantity of the fan can be guaranteed while the whole volume of the single wind wheel installation cavity 21 can be relatively reduced, the whole volume of the fan can be reduced, and the fan has preset air outlet quantity and air outlet uniformity.

Referring to fig. 5 and 6, the single-stage centrifugal wind wheel 30 includes two rims, the two rims are two annular structures disposed at two ends of the single-stage centrifugal wind wheel 30, a plurality of blades 31 are disposed between the two rims, and the plurality of blades 31 are disposed in an annular array with a center of a circle of the rim as a center.

A plurality of single-stage centrifugal wind wheels 30 may be coaxially disposed so that the plurality of single-stage centrifugal wind wheels 30 coaxially rotate. When the airflow is output from the plurality of wind wheel installation cavities 21, the airflow can enter the air outlet channel along the same direction. In another embodiment, the single-stage centrifugal wind wheels 30 may be disposed at a certain included angle, and the direction of the airflow output by the multiple wind wheel installation cavities 21 may be correspondingly adjusted, so as to reduce the air volume difference at the position where the air outlet channel 23 corresponds to the multiple wind wheel installation cavities 21.

In an embodiment, the wind turbine further includes a motor assembly 50, and the motor assembly 50 is in driving connection with at least one single-stage centrifugal wind rotor 30 to drive a plurality of single-stage centrifugal wind rotors 30 to rotate synchronously. Synchronous driving of a plurality of single-stage centrifugal wind wheels 30 is achieved by one motor assembly 50. When the fan is manufactured, the spiral cases 20 can be respectively arranged on two axial sides of the motor assembly 50, the wind wheel assemblies in each spiral case 20 are in a group, and the two groups of wind wheel assemblies are simultaneously driven by one motor assembly 50 to synchronously rotate, so that the air output of the fan is improved, and the energy of the motor assembly 50 can be fully utilized.

The motor assembly 50 may include a motor and a motor base, the motor base may be installed in the air conditioner 100, and the motor is fixedly connected to the motor base.

Referring to fig. 4, 5 and 6, in an embodiment, the spiral casing 20 further includes an air outlet casing 28, and the air outlet casing 28 serves as an air outlet structure of the spiral casing 20. A hollow channel is formed inside the air outlet casing 28 as the air outlet channel 23. Taking the scroll casing 20 including the first casing 201 and the second casing 202 as an example, the wind wheel installation cavity 21 is formed in the first casing 201 and the second casing 202, and the first air outlets 27 communicating with the wind wheel installation cavity 21 are formed in the first casing 201 and the second casing 202, the air outlet casing 28 has first air inlets 281 respectively communicating with each of the first air outlets 27, the air flow in the wind wheel installation cavity 21 enters the first air inlets 281 through the corresponding first air outlets 27, the air outlet casing 28 further has second air outlets 282, and the air outlet channel 23 is formed between the first air inlets 281 and the second air outlets 282. The air outlet channel 23 is a common air duct communicated with the plurality of first air inlets 281.

The first air outlet 27 may be an outlet formed in the periphery of the wind wheel installation cavity 21, and the first air inlets 281 are arranged opposite to the corresponding first air outlet 27, so that the air flow can be smoothly output. The second outlet 282 may face a plurality of the first inlets 281 to reduce the diversion of the airflow.

Optionally, the spiral casing 20 further includes a connection plate 25, the connection plate 25 is disposed between adjacent first air outlets 27, the connection plate 25 is configured to guide a portion of the air flow output from each first air outlet 27, and the connection plate 25 is formed with a guide surface 26 configured to guide the air flow close to the connection plate 25 toward the air outlet channel 23. Because gaps are formed among the plurality of wind wheel installation cavities 21, when the airflow in the wind wheel installation cavities 21 is output, the airflow at the position corresponding to the gap between the adjacent wind wheel installation cavities 21 may be relatively small, and the flow guide surface 26 may be an arc surface or an inclined surface, so as to enable the airflow to be uniformly output to the air outlet channel 23.

As shown in fig. 4, a gap is formed between the first casing 201 and the second casing 202, a gap is formed between the first outlet 27 of the first casing 201 and the first outlet 27 of the second casing 202, and the connecting plate 25 can guide the airflow output from the first outlet 27 of the first casing 201 and the second casing 202 to the position of the outlet channel 23 corresponding to the gap between the first casing 201 and the second casing 202, so as to increase the air volume at the position corresponding to the gap between the outlet channel 23 and the first casing 201 and the second casing 202, and further increase the uniformity of the outlet air at the second outlet 282. As shown in fig. 4, the flow guiding surface 26 is a convex arc surface protruding toward the air outlet channel, and the flow guiding surface 26 may also be a concave arc surface or an inclined surface. The flow guide surface 26 is protruded toward the air outlet channel 23, so that the air flow near the connection plate 25 can be guided to the position of the air outlet channel 23 corresponding to the gap between the first casing 201 and the second casing 202 along the flow guide surface 26, thereby preventing the air flow output by the air outlet channel 23 corresponding to the gap between the first casing 201 and the second casing 202 from being reduced, preventing the problems of large air flow at the two ends and small air flow in the middle of the second air outlet 282, and further facilitating the improvement of the uniformity of the air outlet of the second air outlet 282 of the air outlet casing.

Referring to fig. 6 and 7, in an embodiment, the connecting plate 25 is an arc plate whose middle portion protrudes toward the air outlet channel 23, and the flow guiding surface 26 is a convex arc surface facing the air outlet channel 23; the air flow output by the adjacent first air outlets is guided to the air outlet channel, and the maximum chord length of the cambered surface of the inner periphery of the connecting plate 25 is H ₄ The radius of the convex arc surface where the flow guide surface 26 is located is R, wherein R is less than or equal to 0.5H ₄ So that the diversion surface 26 can be in convex curved surface transition, the coanda effect is fully utilized, the guiding effect is increased, and the air quantity of the middle part corresponding to the diversion surface is supplemented, so that the air outlet is more uniform.

In another embodiment, the distance between the end of the flow guiding surface 26 facing the air outlet channel 23 and the second air outlet 282 is not less than 15mm. The air flow guided by the connecting plate is arranged, so that the uniformity of the air outlet can be improved, the uniformity of the air outlet is ensured, and the abnormal sound at the air outlet is improved.

Referring to fig. 6 and 7, the volute 20 has a plurality of shells, each shell is respectively formed with the wind wheel installation cavity 21, each shell is respectively formed with the air inlet 22 and the first air outlet 27 which are communicated with the corresponding wind wheel installation cavity 21, the first air outlets 27 of adjacent shells are respectively provided with an intermediate plate 251, and the connecting plate 25 is connected with the shells through the intermediate plates 251; the intermediate plate has the function of connecting the connecting plate and the shell, and in the air flow output from the first air outlet, the air flow close to the axial edge of the shell can flow towards the connecting plate along the intermediate plate.

Please refer to fig. 8, when R =0.5H ₄ The included angle between the intermediate plates 251 of adjacent housings is B, where B =0 °. The intermediate plate can rectify the airflow output by the first air outlet and change the uniformity of the airflow.

Referring to FIG. 9, further alternatively, when R < 0.5H ₄ In the meantime, the included angle B between the intermediate plates 251 of the adjacent housings is less than 30 °. The arc surface presents a convex curved surface transition so as to fully utilize the coanda effect, increase the guiding effect and supplement the air quantity of the middle part.

With continued reference to fig. 9, in an embodiment, the spiral casing 20 has a plurality of casings, each casing is respectively formed with the wind wheel installation cavity 21, each casing is respectively formed with the air inlet 22 and the first air outlet 27 communicated with the corresponding wind wheel installation cavity 21, the first air outlet 27 of the adjacent casing is respectively provided with a transition plate 252, one end of the transition plate 252 away from the casing is provided with an intermediate plate 251, and the connection plate 25 is connected to the transition plate 252 through the intermediate plate 251; the transition plate is connected with the shell to support the shell and the middle plate, the transition plate and the middle plate are sequentially connected to form a transition structure between the connecting plate and the shell to conduct flow. The transition plate 252 is arranged perpendicular to the axial direction of the single-stage centrifugal wind wheel 30, wherein the length A3 of the transition plate 252 is not less than 5mm from the housing to the wind outlet housing 28. The length of intermediate lamella is A2, and the bigger is the better for A3 size, and this size influences the noise, integrates the wind field after its impeller does work, prevents that inside wind field is disorderly unordered, and the wind field after the arrangement carries out the guide effect through A2-A3 section and R arc surface, increases its air-out scope.

With continued reference to fig. 7, in an embodiment, the distance H between the transition plate 252 and the outer end face of the air inlet 22 of the housing on the same side is along the axial direction of the single-stage centrifugal wind wheel 30 ₅ In which H is ₅ Not more than 10mm and not less than 3mm. Irrespective of the thickness of the connecting plate, H ₄ ＝H ₃ +2H ₅ . Wherein H ₅ The air inlet of the volute is protruded outwards, so that the air inlet has the function of air inlet and flow guiding, and the air entering a centrifugal wind field can be rectified, and abnormal sound is reduced.

Referring to fig. 6 and 10, in an embodiment, the spiral casing 20 has a plurality of casings, each casing forms the wind wheel installation cavity 21, and each casing forms the wind inlet 22 and the first wind outlet 27 communicated with the corresponding wind wheel installation cavity 21, for example, as a first casing 201 and a second casing 202 in fig. 6, the single-stage centrifugal wind wheel 30 has an outer diameter D ₁ The gap between the facing end faces of the first case 201 and the second case 202 is H ₃ Wherein H is ₃ Not less than 0.3D ₁ . When the distance H between the first housing 201 and the second housing 202 ₃ Less than 0.3D ₁ When the gap between the first casing 201 and the second casing 202 is too small, the air volume of the air inlet 22 on the opposite end surfaces of the first casing 201 and the second casing 202 is too small, which affects the air volume and the air inlet uniformity of the fan.

Referring to fig. 6 and 11, in an embodiment, two axial ends of the single-stage centrifugal wind wheel 30 are respectively provided with rims, and the rims may be the one-way rimsThe centrifugal wind wheel comprises two annular bodies at two ends of the centrifugal wind wheel, wherein a plurality of blades 31 are arranged between the rims, the blades 31 are in annular arrays, the end surface of one side of each rim, which faces away from the blades 31, is the outer surface of each rim, and the distance between the outer surface of each rim and the inner surface of the volute 20 on the same side of the outer surface of each rim is H ₂ Wherein H is ₂ Not less than 4mm and not more than 6.5mm. As shown in fig. 6, the distance between the edge of the air inlet 22 of the first casing 201 and the outer surface of the rim on the same side is H ₂ When the air inlet 22 of the first casing 201 is provided with the air guiding ring 24 protruding into the wind wheel installation cavity 21, the H is ₂ Is the distance between the outer surface of the rim and the edge of the air-guiding rim 24.

When H is present ₂ When the diameter is larger than 6.5mm, the too large gap between the rim and the edge of the air inlet 22 of the volute 20 can cause air leakage at the edge of the air inlet 22 and also can cause vortex flow at the rim, and the vortex flow can cause a large vortex block to be formed at the position of the single-stage centrifugal wind wheel 30 close to the rim, so that the air inlet resistance is increased, and the air inlet amount of the single-stage centrifugal wind wheel 30 is reduced. When the air current produces the vortex, can produce the vortex noise, cause the air inlet noise increase of single-stage centrifugal wind wheel 30, and then increase the whole noise of operation of fan. Since the air flow near the rim is reduced along with the generation of the vortex, the air inlet area of the single-stage centrifugal wind wheel 30 is unbalanced, and the air outlet is unbalanced. When H is present ₂ When the distance between the rim and the inner wall of the volute 20 is too small, the rim interferes with the volute 20 to generate vibration noise, and the safety of the single-stage centrifugal wind wheel 30 in operation is affected.

Referring to fig. 6 and 12, in one embodiment, the single-stage centrifugal wind wheel 30 has an outer diameter D ₁ The axial length of the single-stage centrifugal wind wheel 30 is H ₁ Wherein, 1/3D ₁ ≤H ₁ ≤2/3D ₁ . The axial length of the single-stage centrifugal wind wheel 30 is the length between the outer end faces of the two axial ends of the single-stage centrifugal wind wheel 30. The axial lengths of the adjacent single-stage centrifugal wind wheels 30 can be the same or different. When the axial lengths of the adjacent single-stage centrifugal wind wheels 30 are different, the lengths are selected fromIts outer peripheral diameter D ₁ And correspondingly. By selecting the range, the length of the single-stage centrifugal wind wheel 30 corresponds to the diameter of the periphery of the single-stage centrifugal wind wheel, and on the premise that the air inlet volume of the single-stage centrifugal wind wheel 30 is constant, the larger the axial length is, the lower the uniformity of the output air flow is. When 1/3D ₁ ＞H ₁ When the total air intake of the single-stage centrifugal wind wheel 30 is reduced, when the total air intake is H ₁ ＞2/3D ₁ In the process, due to the increase of the length of the single-stage centrifugal wind wheel 30, the air inlet volume of different parts of the single-stage centrifugal wind wheel 30 is not uniform, so that the air outlet volume of the single-stage centrifugal wind wheel 30 is not uniform. Thus passing 1/3D ₁ ≤H ₁ ≤2/3D ₁ The air outlet uniformity of the single-stage centrifugal wind wheel 30 can be improved while the air inlet amount of the single-stage centrifugal wind wheel 30 can be ensured. Further cooperate with air-out passageway 23, can effectively promote the air-out homogeneity and the amount of wind of fan.

Referring to fig. 12 and 13, in an embodiment, the blades 31 of the single-stage centrifugal wind wheel 30 are staggered from each other along the axial direction of the single-stage centrifugal wind wheel 30. Through staggering the setting each other with blade 31 of adjacent single-stage centrifugal wind wheel 30, can reduce the air-out noise when guaranteeing the intake of fan, and then promote the user experience of fan.

Because single-stage centrifugal wind wheel 30 moves, can drive the air current and export from the first air outlet 27 of every wind wheel installation cavity 21, because the mutual dislocation set of blade 31 of adjacent single-stage centrifugal wind wheel 30, when the export air current gets into air-out passageway 23, can not produce resonance with the inner wall of air-out passageway 23, and then reduce the air-out noise.

When the connecting plate 25 is arranged and the flow is guided by the flow guide surface 26 on the connecting plate 25, only the flow guide surface 26 guides the air flow output by each single-stage centrifugal wind wheel 30 to enter the air outlet channel 23, so that the air flow in the air outlet channel 23 is not easy to generate hedging or vortex, the vortex noise can be reduced, and the air volume of the air outlet channel 23 at the position corresponding to the gap between the adjacent first air outlets 27 can not be influenced.

When a plurality of single-stage centrifugal wind wheels 30 are coaxially arranged, in order to further reduce the wind outlet noise, optionally, the wind wheel setIn the projection of the single-stage centrifugal wind wheel 30, the blades 31 of the single-stage centrifugal wind wheel are arranged at equal intervals. Taking the fan having the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 as an example, as shown in fig. 13, in the first single-stage centrifugal wind wheel 301, the central angle corresponding to the adjacent blades 31 is a ₁ In a projection of the first single-stage centrifugal wind wheel 301 and the second single-stage centrifugal wind wheel 302 on a plane perpendicular to the axial direction of the first single-stage centrifugal wind wheel 301, the blades 31 of the first single-stage centrifugal wind wheel 301 and the blades 31 of the second single-stage centrifugal wind wheel 302 are staggered, wherein the central angle corresponding to the blades 31 of the first single-stage centrifugal wind wheel 301 and the adjacent blades 31 of the second single-stage centrifugal wind wheel 302 in fig. 13 is a ₂ ，A ₂ ＝A ₁ /2. When there are N single-stage centrifugal wind wheels 30, A ₂ ＝A ₁ and/N. In fig. 13, the blades 31 of the plurality of single-stage centrifugal wind wheels 30 are annularly arrayed centering on the axial center of the connecting member 40.

When a plurality of single-stage centrifugal wind wheels 30 are operated, the single-stage centrifugal wind wheels 30 can respectively perform air inlet on two sides, so that the air inlet area is larger, and the blades 31 are arranged in a staggered and evenly distributed mode, so that the noise generated by the operation of the adjacent single-stage centrifugal wind wheels 30 is relatively reduced, and the overall noise of the fan can be reduced.

Referring to fig. 14 and 15, the present invention further provides an embodiment of an air conditioner 100, wherein the air conditioner 100 includes a blower according to any of the above embodiments.

Referring to fig. 16 and 17, the air conditioner 100 may further include a cabinet and a heat exchanger 110 disposed in the cabinet, wherein the heat exchanger 110 may be a multi-fold evaporator for exchanging heat of the air entering the air conditioner 100.

In the air conditioner 100, the airflow entering the air conditioner 100 may first pass through the heat exchanger 110 for heat exchange, and then is pumped out of the air conditioner 100 by the fan. Under the action of the fan, negative pressure is formed on the side of the heat exchanger 110 facing the fan, so that the airflow will flow towards the air inlet 22 of the fan through the heat exchanger 110.

In the air conditioner 100, the airflow may firstly enter the air conditioner 100 under the action of the blower and then blow to the heat exchanger 110, the air pressure at the side of the heat exchanger 110 facing the second air outlet 282 of the blower is greater than the air pressure at the side of the heat exchanger 110 facing away from the blower, and the airflow output from the second air outlet 282 of the blower exchanges heat with the heat exchanger 110 and is output from the enclosure.

When two volutes 20 are provided, the motor assembly 50 may be provided between the two volutes 20. The air outlet channels of each volute 20 may all face the same direction, and all face the heat exchanger 110. After the air current gets into in the casing, get into in the wind wheel installation cavity 21 in the air intake 22 department that every wind wheel installation cavity 21 corresponds to first casing 201 and second casing 202 set up as the example, every spiral case 20 has four air intakes 22 simultaneously, increase the air inlet area of fan, and then can increase the intake, promote the intake in the different position of spiral case 20 through four air intakes 22, when making to obtain wind, the air output of different positions tends to the balance, and then can promote the air-out homogeneity of carrying to heat exchanger 110. Because heat exchanger 110 and air current carry out the heat transfer, the temperature difference of the air current of output can increase after the heat transfer of heat exchanger 110, through promoting the homogeneity of the air current of carrying to heat exchanger 110, can effectively reduce the difference in temperature when the casing of air conditioner 100 goes out the wind, helps promoting user experience.

The casing of the air conditioner 100 is provided with a channel for air intake, and each volute 20 corresponds to the same air intake channel. An air inlet grille may be disposed on the casing of the air conditioner 100 for shielding the air inlet channel and preventing foreign matters from entering the air inlet channel. An air outlet grille can also be arranged at the same time.

Because all set up single-stage centrifugal wind wheel 30 in every wind wheel installation cavity 21 of spiral case 20, compare the multistage centrifugal wind wheel that a plurality of wind wheel axial connect formed, adopt single-stage centrifugal wind wheel 30 can reduce the volume of fan. Because the axial length of the single-stage centrifugal wind wheel 30 is reduced, and the single-stage centrifugal wind wheel 30 enters air from the two axial ends, the air flow output from each first air outlet 27 is more uniform, and the air output of the first air outlet 27 can be equal to the air output of the two ends of the single-stage centrifugal wind wheel 30 at the middle position close to the single-stage centrifugal wind wheel 30. Because each single-stage centrifugal wind wheel 30 is provided with two air inlets 22 at the same time, the air inlet area is increased, so that the air inlet volume of each single-stage centrifugal wind wheel 30 is relatively increased, and the uniformity of outlet air can be improved while the air inlet volume is increased.

The plurality of volutes 20 correspond to the same air outlet channel of the air outlet shell 28, and the air flow is output from the air outlet channel, so that the output air flow can be kept balanced. When the connecting plate 25 is arranged on the air outlet casing 28, the connecting plate 25 can be used for transition airflow, and the airflow is guided to the position with smaller air volume in the air outlet channel 23 through the cambered surface or the inclined surface on the connecting plate 25, so that the uniformity of the airflow can be further improved.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.

Claims

1. A fan, comprising:

the volute is provided with a plurality of wind wheel installation cavities which are arranged at intervals, each wind wheel installation cavity is respectively provided with two air inlets which are arranged oppositely, and the volute is also provided with an air outlet channel which is communicated with the plurality of wind wheel installation cavities; the volute also comprises an air outlet shell and a connecting plate, each wind wheel mounting cavity is provided with a first air outlet, the air outlet shell is provided with a first air inlet which is correspondingly communicated with each first air outlet, the air outlet shell is also provided with a second air outlet, and an air outlet channel is formed between the first air inlet and the second air outlet; the connecting plate is arranged between the adjacent first air outlets, a flow guide surface for guiding the airflow close to the connecting plate to the air outlet channel is formed on the connecting plate, and the flow guide surface is a convex arc surface arranged towards the air outlet channel; the air outlet channel is a common air channel communicated with the first air inlets; the connecting plate is an arc-shaped plate with the middle part protruding towards the air outlet channel; and

the wind wheel assembly comprises a plurality of single-stage centrifugal wind wheels which are spaced from each other, the single-stage centrifugal wind wheels are connected through connecting pieces in sequence, and each wind wheel installation cavity is provided with one single-stage centrifugal wind wheel; and blades of the adjacent single-stage centrifugal wind wheels are arranged in a staggered manner along the axial direction of the single-stage centrifugal wind wheels.

2. The fan of claim 1, wherein the maximum chord length of the arc surface of the inner periphery of the connecting plate is H4, the radius of the convex arc surface where the flow guide surface is located is R, wherein R is less than or equal to 0.5H ₄ (ii) a And/or the distance between one end of the flow guide surface facing the air outlet channel and the second air outlet is not less than 15mm.

3. The fan according to claim 2, wherein the volute has a plurality of housings, each housing is respectively formed with the wind wheel installation cavity, each housing is respectively formed with the air inlet and the first air outlet which are communicated with the corresponding wind wheel installation cavity, the first air outlets of adjacent housings are respectively provided with an intermediate plate, and the connecting plate is connected with the housings through the intermediate plates;

when R =0.5H ₄ When the angle between the middle plates of the adjacent shells is B, wherein B =0 deg.

4. The fan as claimed in claim 3, wherein when R < 0.5H ₄ And when the shell is used, the included angle B between the middle plates of the adjacent shells is less than 30 degrees.

5. The fan according to claim 2, wherein the volute has a plurality of shells, each shell is respectively formed with the wind wheel installation cavity, each shell is respectively formed with the air inlet and the first air outlet which are communicated with the corresponding wind wheel installation cavity, the first air outlet of the adjacent shell is respectively provided with a transition plate, one end of the transition plate, which is far away from the shell, is provided with a middle plate, and the connecting plate is connected with the transition plate through the middle plate;

6. The fan according to claim 5, wherein in the axial direction of the single-stage centrifugal wind wheel, the distance between the transition plate and the outer side end face of the air inlet of the housing on the same side of the transition plate is not more than 10mm and not less than 3mm.

7. The fan according to claim 1, wherein the volute has a plurality of housings, each housing is formed with the wind wheel installation cavity, each housing is formed with the air inlet and the first air outlet communicated with the corresponding wind wheel installation cavity, and the single-stage centrifugal wind wheel has an outer diameter D ₁ A gap between adjacent ones of the housings is not less than 0.3D ₁ 。

8. The fan according to claim 1, wherein the single-stage centrifugal wind wheel is provided with rims at both axial ends respectively, the rims are provided with blades therebetween, and the distance between the end surface of one side of the rim facing away from the blades and the inner surface of the volute on the same side of the rim is not less than 4mm and not more than 6.5mm.

9. The wind turbine of claim 1 wherein the single-stage centrifugal wind wheel has an outer diameter D ₁ The axial length of the single-stage centrifugal wind wheel is H ₁ Wherein, 853131D ₁ ≤H ₁ ≤⅔D ₁ 。

10. The fan according to claim 1, wherein a plurality of the single-stage centrifugal fans are coaxially arranged.

11. The wind turbine of claim 10 wherein the blades of the single-stage centrifugal wind rotor are equally spaced in a projection of the wind wheel assembly in a plane perpendicular to the axial direction of the wind wheel assembly.

12. The fan of any of claims 1 to 9, further comprising:

13. An air conditioner characterized by comprising the blower fan according to any one of claims 1 to 12.