CN114837974A

CN114837974A - Cross-flow fan and air conditioning equipment

Info

Publication number: CN114837974A
Application number: CN202210635433.9A
Authority: CN
Inventors: 梁富菲; 关焕豪; 吴明国; 谢恒�; 谢林斌; 张海城
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-08-02
Also published as: WO2023236680A1

Abstract

The invention relates to a cross-flow fan and air conditioning equipment, wherein the cross-flow fan comprises a volute formed by bending a sheet metal part, the volute comprises a first section, a tail section and at least two middle sections positioned between the first section and the tail section, and angles formed by the first section and the adjacent middle sections, the tail section and the adjacent middle sections and the two adjacent middle sections are all larger than zero degrees. The volute of cross-flow fan adopts the sheet metal component to bend the cubic at least and forms, and the sheet metal is bent and is compared the die sinking processing technology simpler, and the cost is also cheaper, and the sheet metal bending plasticity is very strong, and the structure is easily adjusted, has improved cross-flow fan complete machine structure size's variety, can adapt to different application environment.

Description

Cross-flow fan and air conditioning equipment

Technical Field

The invention relates to the technical field of air conditioning, in particular to a cross-flow fan and air conditioning equipment.

Background

The cross-flow fan is widely applied to household appliances such as a hanging type air conditioner, a cabinet type air conditioner and the like due to the advantages of uniform air supply, low energy consumption, small and exquisite structure and the like. And because of its wide air supply range, the equilibrator temperature that can be better begins to be applied to the refrigeration trade. In some related technologies, the volute of the cross-flow fan is made of a die-sinking injection molding part, so that the problems of high cost, long processing period and the like exist.

Disclosure of Invention

Some embodiments of the present invention provide a cross-flow fan and an air conditioning apparatus for alleviating the problem of a long process cycle.

In one aspect of the invention, the cross-flow fan comprises a volute formed by bending a sheet metal part, wherein the volute comprises a first section, a tail section and at least two middle sections positioned between the first section and the tail section, and angles formed by the first section and the adjacent middle sections, the tail section and the adjacent middle sections and the adjacent two middle sections are all larger than zero degrees.

In some embodiments, the crossflow blower further comprises a volute tongue and an impeller, the volute tongue comprising a first portion and a second portion, the first portion and the volute cooperating to envelope the impeller, the second portion and the volute forming an air outlet therebetween.

In some embodiments, angle α is an angle formed by a connecting line OA and a connecting line OC, angle β is an angle formed by a connecting line OB and a connecting line OC, O is a central point of a radial cross section of the impeller, a is a point on the volute nearest to the central point O, B is a point on the first portion nearest to the central point O, and C is a point on an extension line of the second portion nearest to the central point O.

In some embodiments, the line OA is perpendicular to the axial direction of the impeller.

In some embodiments, the point C is also a point on the impeller at which an extension of the second portion is tangent to a radial cross-section of the impeller.

In some embodiments, the first section is located at the top of the volute and at the position of the air inlet of the cross-flow fan, the tail section is located at the side of the volute and at the position of the air outlet of the cross-flow fan, an angle formed by a tangent passing through the highest point of the first section and a tangent passing through the outermost point of the tail section is ═ γ, and ═ γ is 90 ° ± -5 °.

In some embodiments of the present invention, the,

wherein n is the bending frequency of the volute, n is more than or equal to 3, and angle d _i The value range of i is 1 to n for the angle of the ith bending position.

In some embodiments, angle d _i Has a value in the range of (90 DEG, 180 DEG).

In some embodiments, the angle θ is equal to or less than 40 degrees and equal to or less than 60 degrees, wherein the angle θ is an included angle between a connecting line CD and a horizontal line L1, C is a first end point of the volute on a section in the radial direction of the cross-flow fan, and D is a tail end point of the volute on the section in the radial direction of the cross-flow fan.

In some embodiments, the angle is more than or equal to 20 degrees and less than or equal to 40 degrees, wherein the angle is an included angle between a connecting line EF and a horizontal line L2, E is a first end point of a cross section of the volute tongue along the radial direction of the cross-flow fan, and F is a tail end point of the cross section of the volute tongue along the radial direction of the cross-flow fan.

In some embodiments, the cross-flow fan further includes at least two air deflectors, the at least two air deflectors are spaced apart from the air outlet, and each air deflector is connected to the second portion.

In some embodiments, the crossflow blower further comprises a first side plate and a second side plate made of sheet metal, the first side plate is connected to a first side of the volute and the volute tongue, the second side plate is connected to a second side of the volute and the volute tongue, and the second side is opposite to the first side.

In some embodiments, the impeller includes a leading end segment, a trailing end segment, and at least one intermediate segment disposed in series between the leading end segment and the trailing end segment.

In some embodiments, the crossflow blower further comprises a volute tongue formed by bending a sheet metal part.

In one aspect of the invention, an air conditioning apparatus is provided comprising a crossflow blower as described above.

In some embodiments, the air conditioning device is an air conditioner, a fresh air system, or a freezer.

Based on the technical scheme, the invention at least has the following beneficial effects:

in some embodiments, the volute of the cross-flow fan is formed by bending a sheet metal part for at least three times, the sheet metal bending is simpler than die sinking processing technology, the cost is lower, the sheet metal bending plasticity is strong, the structure is easy to adjust, the diversity of the overall structure size of the cross-flow fan is improved, and the volute can adapt to different application environments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic view of a crossflow blower provided in accordance with some embodiments of the present invention;

FIG. 2 is a schematic illustration of a radial cross-section of a crossflow blower provided in accordance with some embodiments of the present invention;

FIG. 3 is a schematic radial cross-sectional view of the volute and the volute tongue provided in accordance with some embodiments of the invention after they cooperate to form a space that envelopes the impeller;

fig. 4 is a schematic view of an impeller provided according to some embodiments of the present invention.

The reference numbers in the drawings illustrate the following:

1-a volute; 11-first stage; 12-a tail section; 13-middle section; 2-volute tongue; 21-a first section; 22-a second portion; 3-an impeller; 31-head section; 32-middle section; 33-tail end segment; 34-a first shaft; 35-a second axis; 4-a wind deflector; 5-a first side plate; 51-front side; 52-rear side; 6-a second side plate; 7-air outlet; 8-air inlet; 9-bearing.

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the invention, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intervening device between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

Referring to fig. 1 and 2, in some embodiments, the crossflow blower includes a volute 1 formed by bending a sheet metal part, and the volute 1 includes a first section 11, a tail section 12, and at least two middle sections 13 located between the first section 11 and the tail section 12. The first section 11, the at least two intermediate sections 13 and the end section 12 are connected in sequence.

The angle formed by the leading section 11 and the adjoining intermediate section 13 is greater than zero degrees. The end section 12 forms an angle with the adjoining intermediate section 13 that is greater than zero degrees. And the angle formed by two adjacent intermediate segments 13 is greater than zero degrees.

In some related technologies, the volute is processed by adopting a mold, so that the mold opening needs to be made in advance, the mold opening period is long, the cost is high, and the whole structure of the cross-flow fan formed by the volute is limited, so that the volute cannot be applied to different application environments.

Based on this, the spiral case 1 of cross-flow fan that this disclosure embodiment provided adopts the sheet metal component to bend and forms, and the sheet metal is bent and is compared the die sinking processing technology simpler, and the cost is also cheaper, and the sheet metal bending plasticity is very strong, and the structure is easily adjusted, has improved cross-flow fan complete machine structure size's variety, can adapt to different application environment.

Because the volute 1 comprises the first section 11, the tail section 12 and at least two middle sections 13 positioned between the first section 11 and the tail section 12, the volute 1 comprises at least three bending positions, namely the bending times n of the volute are more than or equal to 3, and the air supply uniformity can be improved. Of course, the more smooth the molded line of the volute 1 after being bent for many times, the better.

The first section 11 of the volute 1 is at the position of the air inlet 8, and the last section 12 is at the position of the air outlet 7.

In some embodiments, the crossflow blower further comprises a volute 2 and an impeller 3, the volute 2 comprises a first portion 21 and a second portion 22, the first portion 21 and the volute 1 cooperate to envelop the impeller 3, and an end of the first portion 21 remote from the second portion 22 and the volute 1 form an air inlet 8. An air outlet 7 of the cross-flow fan is formed between the second part 22 and the volute 1.

The first part 21 and the volute 1 are matched to envelop the impeller 3, an air inlet 8 of the cross-flow fan is formed between the first part 21 and the volute 1, an air outlet 7 of the cross-flow fan is formed between the second part 22 and the volute 1, and the volute tongue 2 and the volute 1 form an enveloping curve of the impeller 3, so that the air supply uniformity is improved.

In some embodiments, the crossflow blower further comprises a volute tongue 2 formed by bending a sheet metal part.

The volute tongue 2 is formed by bending a sheet metal part, the sheet metal bending is simpler than die sinking processing technology, the cost is lower, the sheet metal bending plasticity is strong, the structure is easy to adjust, the diversity of the overall structure size of the cross-flow fan is improved, and the cross-flow fan can adapt to different application environments.

The first part 21 of the volute tongue 2 comprises at least two bending parts, and the first part 21 and the second part 22 are also formed by bending.

Referring to fig. 2 and 3, the volute 1 envelopes the upper portion of the impeller 3 and the side of the impeller 3 remote from the air inlet 8, and the first portion 21 envelopes the lower portion of the impeller 3. The second portion 22 forms an air outlet 7 with the scroll casing 1. One end of the first portion 21 is located at the air inlet 8, the other end of the first portion 21 is connected to the second portion 22, and the second portion 22 is inclined downward of the first portion 21 and away from the scroll casing 1. Along the flow direction of the air flow, the opening of the air outlet 7 is gradually enlarged.

References to the orientation of the "upper", "lower", "top", "bottom" and "sides" of the volute 1 in the embodiments of the present disclosure are: the axial direction of the cross-flow fan is basically parallel to the horizontal plane, the air outlet of the cross-flow fan faces downwards, and the cross-flow fan in the state corresponds to the position.

Referring to fig. 2, in some embodiments, angle α is an angle formed by a connection line OA and a connection line OC, angle β is an angle formed by a connection line OB and a connection line OC, O is a central point of a radial cross section of the impeller 3, a is a point on the volute 1 closest to the central point O, B is a point on the first portion 21 closest to the central point O, and C is a point on an extension line of the second portion 22 closest to the central point O.

After the volute 1, the volute tongue 2 and the impeller 3 are assembled, the angle AOB is the range angle of the air inlet 8, and the angle alpha is the angle beta, so that the air suction resistance can be minimum, and the cross-flow fan can uniformly supply air and stably operate.

In some embodiments, the line OA is perpendicular to the axial direction of the impeller 3.

The point A on the volute 1, which is closest to the central point O, is positioned right above the impeller 3, and the connecting line OA is perpendicular to the axial direction of the impeller 3, so that the mounting requirement can be met, and the uniform air supply is facilitated.

In some embodiments, point C is also a point on the impeller 3, at which the extension of the second portion 22 is tangent to a radial section of the impeller 3.

Referring to fig. 3, in some embodiments, the first section 11 is located at the top of the volute 1 and at the position of the air inlet 8 of the cross-flow fan, the tail section 12 is located at the side of the volute 1 and at the position of the air outlet 7 of the cross-flow fan, an angle formed by a tangent line passing through the highest point of the first section 11 and a tangent line passing through the outermost point of the tail section 12 is ═ γ, and ═ γ is 90 ° ± 5 °.

The first section 11 is located at the top of the volute 1, and the highest point of the first section 11 corresponds to the highest point on the first section 11. The tail section 12 is positioned at the side part of the volute 1, and the outermost point of the tail section 12 corresponds to the point on the tail section 12 farthest away from the volute tongue 2.

When the cross-flow fan is installed in the shell, the cross-flow fan is generally positioned at an included angle between a top plate and a back plate of the shell, the top of the volute 1 is close to the top plate of the shell, the side part of the volute 1 is close to the back plate of the shell, an angle gamma formed by a tangent line passing through the highest point of the first section 11 and a tangent line passing through the outermost point of the tail section 12 is an installation angle which is 90 degrees +/-5 degrees, the installation angle can increase the use space in the shell, the installation angle is designed to be 90 degrees +/-5 degrees, the volute 1 can be in close contact with the shell, and the whole machine is more stable in operation; and can avoid contacting and have the gap, avoid leading to leak out when using, produce the noise, reduce the problem of product performance.

In some embodiments, the distance between each intermediate section 13 and the impeller 3 increases in sequence in the direction from the first section 11 to the last section 12 on a section of the volute 1 in the radial direction of the crossflow blower.

In some embodiments, the first section 11 and the tail section 12 are both planar sections, and on a cross section of the volute 1 taken along the radial direction of the cross-flow fan, an extension line of the first section 11 is collinear with a tangent line passing through the highest point of the first section 11, and an extension line of the tail section 12 is collinear with a tangent line passing through the outermost point of the tail section 12, so that an angle formed by the extension line of the first section 11 and the extension line of the tail section 12 is also equal to 90 ° ± 5 °.

Optionally, the first section 11 is a horizontal section and the last section 12 is a vertical section.

In some embodiments of the present invention, the,

wherein n is the bending frequency of the volute 1, n is more than or equal to 3, and d is smaller than or equal to _i The value range of i is 1 to n for the angle of the ith bending position.

The bending times of the volute 1 are more than or equal to three times, and the angle of each bending position is reasonably selected, so that the molded line of the volute 1 is more arc-shaped, and uniform air outlet is facilitated.

In some embodiments, angle d _i Is (90 deg., 180 deg.). That is, the angle formed by the first segment 11 of the volute 1 and the adjacent middle segment 13, the angle formed by the last segment 12 and the adjacent middle segment 13, and the angles formed by the two adjacent middle segments 13 all have the values of (90 °, 180 °).

∠d _i The value range of (90 degrees and 180 degrees) can make the molded line of the volute 1 more arc-shaped, which is beneficial to uniform air outlet.

Referring to fig. 3, in some embodiments, the angle θ is equal to or less than 40 ° and equal to or less than 60 °, wherein the angle θ is an included angle between a connecting line CD and a horizontal line L1, C is a leading end point on a section of the scroll casing 1 in the radial direction of the cross-flow fan, and D is a trailing end point on the section of the scroll casing 1 in the radial direction of the cross-flow fan.

The first section point C of the volute 1 is the starting point of the first section 11 at the air inlet 8, and the tail end point D of the volute 1 is the ending point of the tail section 12 at the air outlet 7.

The angle theta is related to the range angle of the air inlet 8, theoretically, the larger the value of the angle theta is, the better the angle theta is, but due to the limitation of the right-angle mounting edge in the shell, the included angle cannot be amplified infinitely, and a certain upper limit value exists. And the over-small angle theta can make the range angle of the air inlet 8 become small, influence the complete machine performance, consequently, angle theta is less than or equal to 40 degrees and less than or equal to 60 degrees, can enough rationally utilize the installation space, can avoid the amount of wind to reduce by a wide margin again, does not influence the amount of wind of cross-flow fan, improves the complete machine performance. Under the general condition, the angle theta is less than 40 degrees, so that the air volume is greatly reduced, and the expected effect cannot be achieved.

In some embodiments, the angle is more than or equal to 20 degrees and less than or equal to 40 degrees, wherein the angle is the included angle between a connecting line EF and a horizontal line L2, E is a first end point of the cross section of the volute tongue 2 along the radial direction of the cross-flow fan, and F is a tail end point of the cross section of the volute tongue 2 along the radial direction of the cross-flow fan.

The head end point E of the volute tongue 2 is the starting point of the first portion 21 at the air inlet 8, and the tail end point F of the volute tongue 2 is the ending point of the second portion 22 at the air outlet 7.

The angle is related to the range angle of the air inlet 8, theoretically, the larger the value of the angle is, the better the angle is, but due to the limitation of the right-angle mounting edge in the shell, the included angle cannot be amplified infinitely, and a certain upper limit value exists. And the undersize of the angle epsilon can lead the range angle of the air inlet 8 to be reduced and the performance of the whole machine to be influenced, therefore, the angle epsilon is more than or equal to 20 degrees and less than or equal to 40 degrees, the installation space can be reasonably utilized, the air volume can be avoided to be greatly reduced, the air volume of the cross-flow fan is not influenced, and the performance of the whole machine is improved. Under the general condition, the angle epsilon is less than 20 degrees, the air quantity is greatly reduced, and the expected effect cannot be achieved.

Referring to fig. 1, in some embodiments, the crossflow blower further includes at least two air deflectors 4, the at least two air deflectors 4 are disposed at the air outlet 7 at intervals along the axial direction of the crossflow blower, and each air deflector 4 is connected to the second portion 22. Optionally, each air deflector 4 also abuts against the volute 1, respectively.

The air guide plates 4 are arranged at the air outlet 7 at intervals along the axial direction of the cross flow fan, and can guide the air flow flowing out of the air outlet 7, so that the cooling effect and the uniformity of the cooling temperature are improved.

Referring to fig. 1, in some embodiments, the crossflow blower further includes a first side plate 5 and a second side plate 6 made of sheet metal, the first side plate 5 is connected to a first side of the volute 1 and the volute tongue 2, the second side plate 6 is connected to a second side of the volute 1 and the volute tongue 2, and the second side is opposite to the first side.

The profile of the front side 51 of the first side plate 5 matches the profile of the volute tongue 2, i.e. the profile of the front side 51 of the first side plate 5 is also similar to the profile of the radial cross section of the volute tongue 2, and the profile of the front side 5 of the first side plate 5 also comprises a first portion and a second portion. The profile of the rear side 52 of the first side plate 5 matches the profile of the volute 1, that is, the profile of the rear side 52 of the first side plate 5 is also similar to the profile of the radial cross section of the volute 1, and the profile of the rear side 52 of the first side plate 5 also includes a first section, a last section, and at least two intermediate sections located between the first section and the last section. Here, the rear side 52 of the first side plate 5 encloses the front side 51. After the crossflow blower is installed, the rear side 52 of the first side plate 5 is adjacent the back plate of the housing.

The first side plate 5 and the second side plate 6 are identical in structure and are symmetrically arranged. The first side plate 5 and the second side plate 6 have the functions of supporting the impeller 3 and preventing cold leakage.

Referring to fig. 4, in some embodiments, the impeller 3 includes a leading section 31, a trailing section 33, and at least one intermediate section 32 disposed in series between the leading section 31 and the trailing section 33.

The number of the middle joints 32 can be set to be one, two or more than three according to requirements, and the air delivery of the cross-flow fan can be adjusted by increasing or decreasing the number of the middle joints 32.

The head end joint 31, the at least one middle joint 32 and the tail end joint 33 are sequentially connected in series along the axial direction of the cross-flow fan.

Optionally, there is a radial rotational assembly angle between the intermediate links 32, with the axes of the intermediate links 32 being collinear.

In some embodiments, crossflow blower further comprises a first shaft 34 and a second shaft 35, the first shaft 34 having a length greater than the length of the second shaft 35, the first shaft 34 having an axial diameter less than the axial diameter of the second shaft 35. The first shaft 34 is disposed at the tail end segment 33, and the second shaft 35 is disposed at the head end segment 31.

In some embodiments, the crossflow blower may comprise two or more impellers 3, and each impeller 3 may be connected in series.

In the actual design process, the whole machine structure with different structure sizes can be adapted through simple series connection of a plurality of impellers 3 or length size change of the volute and the volute tongue.

In some embodiments, the second shaft 35 is provided with a through hole, and the first shaft 34 on the tail end section 33 of one of the two adjacent impellers 3 can be inserted into the through hole of the second shaft 35 of the head end section 31 of the other impeller 3. The impellers 3 are used in series through the cooperation of the first shaft 34 of the tail end joint 33 and the second shaft 35 of the head end joint 31, so that the impellers are suitable for different overall sizes.

Alternatively, considering that the stability is affected by the excessively long size of the plurality of impellers 3 connected in series, the size of the plurality of impellers 3 connected in series is not larger than 700 mm.

In some embodiments, the crossflow blower further comprises a locking member for locking the first shaft 34 of one of the impellers 3 and the second shaft 35 of the other impeller 3 when the first shaft 34 of the trailing end section 33 of the one impeller is inserted into the through hole of the second shaft 35 of the leading end section 31 of the other impeller 3.

In some embodiments, the crossflow blower further comprises a bearing 9, the bearing 9 is disposed on the first side plate 5, and the first shaft 34 on the tail end section 33 of the impeller 3 is in fit connection with the bearing 9, so that the impeller 3 can rotate smoothly. Optionally, the second shaft 35 on the head end section 31 of the impeller 3 is riveted to the second side plate 5.

In some embodiments, the volute 1, the volute tongue 2, the first side plate 5, the second side plate 6 and the flow guide plate 4 are made of sheet metal, and the volute has the advantages of being simple to process, high in plasticity and the like.

The air duct of the cross-flow fan is formed by bending a metal plate into a volute 1 and a volute tongue 2, and is formed by machining a numerical control metal plate into a side plate and connecting the side plate and the volute tongue by screws, and the like.

In some embodiments, the whole machine with different structural sizes is adapted by connecting a plurality of impellers 3 in series or increasing and decreasing the shaping sizes of the volute tongue 2, the volute 1 and the impeller 3. The shaping dimension here mainly includes the length dimension, which can be accomplished by increasing or decreasing the number of intermediate links 32 of the impeller 3.

In some embodiments, the connection of each component of the volute 1, the volute tongue 2, the first side plate 5, the second side plate 6 and the like can be riveting, screw connection, bolt connection and the like.

In some embodiments, a crossflow blower installation method comprises:

the second part 22 of the volute tongue 2 and the guide plates 4 are welded and assembled into a fixed plate assembly, and the fixed plate assembly is riveted with the front side 51 of the first side plate 5. The rear side 52 of the first side plate 5 is riveted to the volute 1. Here, the rear side 52 of the first side plate 5 encloses the front side 51. After the crossflow blower is installed, the rear side 52 of the first side plate 5 is adjacent the back plate of the housing. The bearing 9 is installed in the center hole of the first side plate 5, and the first shaft 34 of the impeller 3 is installed in the bearing 9. After the impeller 3 is installed, the volute tongue 2 and the other side of the volute 1 are riveted with the second side plate 6.

When the air duct assembly works, the impeller 3 rotates anticlockwise to be drawn into cold air from the air inlet 8, the cold air is guided out to the air outlet 7 by virtue of the volute 1 with a certain bending shape, and the cold air is uniformly conveyed out through the flow guide of the guide plates 4 in the air outlet 7, so that the purpose of adjusting the temperature is achieved.

Some embodiments also provide an air conditioning apparatus including the cross-flow fan described above.

In some embodiments, the air conditioning apparatus includes a housing with a crossflow blower disposed therein.

When the cross-flow fan is installed in the shell, the cross-flow fan is generally positioned at the included angle between the top plate and the back plate of the shell, the top of the volute 1 is close to the top plate of the shell, and the side of the volute 1 is close to the back plate of the shell. The top plate of the housing is at an angle of about 90 degrees to the back plate.

Based on the embodiments of the invention described above, the technical features of one of the embodiments can be advantageously combined with one or more other embodiments without explicit negatives or conflicts.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The cross-flow fan is characterized by comprising a volute (1) formed by bending a sheet metal part, wherein the volute (1) comprises a first section (11), a tail section (12) and at least two middle sections (13) between the first section (11) and the tail section (12), the first section (11) is adjacent to the middle section (13), the tail section (12) is adjacent to the middle section (13), and angles formed by two adjacent middle sections (13) are larger than zero degrees.

2. The crossflow blower according to claim 1, further comprising a volute tongue (2) and an impeller (3), the volute tongue (2) comprising a first portion (21) and a second portion (22), the first portion (21) cooperating with the volute (1) to envelope the impeller (3), the second portion (22) forming an air outlet (7) with the volute (1).

3. The crossflow blower of claim 2 wherein < α > is an angle formed by a connecting line OA and a connecting line OC, and < β > is an angle formed by a connecting line OB and a connecting line OC, O is a central point of a radial cross section of the impeller (3), a is a point on the volute (1) closest to the central point O, B is a point on the first portion (21) closest to the central point O, and C is a point on an extension line of the second portion (22) closest to the central point O.

4. Crossflow blower according to claim 3, characterized in that the connecting line OA is perpendicular to the axial direction of the impeller (3).

5. Crossflow blower according to claim 3, characterized in that the point C is also a point on the impeller (3) at which the extension of the second portion (22) is tangential to a radial section of the impeller (3).

6. The crossflow blower according to any of claims 1 to 5, characterized in that the first section (11) is located at the top of the volute (1) and at the position of the air inlet (8) of the crossflow blower, the tail section (12) is located at the side of the volute (1) and at the position of the air outlet (7) of the crossflow blower, and the angle formed by the tangent passing through the highest point of the first section (11) and the tangent passing through the outermost point of the tail section (12) is equal to γ, and equal to 90 ° ± 5 °.

7. Crossflow blower according to claim 6,

wherein n is the bending times of the volute, n is more than or equal to 3, and angle d _i The value range of i is 1 to n for the angle of the ith bending position.

8. The crossflow blower of claim 7 wherein d _i Has a value in the range of (90 DEG, 180 DEG).

9. The crossflow blower of any one of claims 1 to 5, characterized in that angle θ is equal to or less than 40 ° and equal to or less than 60 °, wherein angle θ is an angle between a connecting line CD and a horizontal line L1, C is a leading point on a cross section of the volute (1) in the radial direction of the crossflow blower, and D is a trailing point on a cross section of the volute (1) in the radial direction of the crossflow blower.

10. The crossflow blower of any one of claims 2 to 5 characterized in that 20 ° to 40 ° where "E" is the angle between the connecting line EF and the horizontal line L2, E is the first point on the cross section of the volute tongue (2) in the radial direction of the crossflow blower, and F is the trailing point on the cross section of the volute tongue (2) in the radial direction of the crossflow blower.

11. The crossflow blower of any one of claims 2 to 5, further comprising at least two air deflectors (4), wherein the at least two air deflectors (4) are arranged at the air outlet (7) at intervals, and each air deflector (4) is connected with the second portion (22).

12. The crossflow blower according to any of claims 2 to 5 further comprising a first side plate (5) and a second side plate (6) made of sheet metal, the first side plate (5) being connected to a first side of the volute (1) and the volute tongue (2), and the second side plate (6) being connected to a second side of the volute (1) and the volute tongue (2), the second side being opposite to the first side.

13. Crossflow blower according to any of claims 2 to 5, characterized in that the impeller (3) comprises a leading section (31), a trailing section (33), and at least one intermediate section (32) arranged in series between the leading section (31) and the trailing section (33).

14. The crossflow blower of claim 1 further comprising a volute tongue (2) formed by bending a sheet metal part.

15. An air conditioning apparatus comprising a crossflow blower as claimed in any one of claims 1 to 14.

16. Air conditioning device according to claim 15, characterized in that the air conditioning device is an air conditioner, a fresh air system or a refrigerator.