WO2024244430A1 - Volute, fan and air conditioner - Google Patents

Abstract

A volute, a fan and an air conditioner. The volute comprises: a volute main body (1), which comprises a fan blade mounting portion (3) configured to mount a fan blade assembly (2), and two air duct portions (4) arranged on two sides of the fan blade mounting portion (3) and spaced apart from each other in a first direction, wherein a first air duct molded line (5) and a second air duct molded line (6) are respectively formed between the fan blade mounting portion (3) and two opposite sides of each air duct portion (4) that are spaced apart from each other in a second direction; the joint between the fan blade mounting portion (3) and the side of each air duct portion (4) close to the first air duct molded line (5) is streamlined; a volute tongue (7) is provided at the joint between the fan blade mounting portion (3) and the side of each air duct portion (4) close to the second air duct molded line (6); and bumps (8) are provided on two opposite sides of at least one air duct portion (4) that are spaced apart from each other along the axis of rotation of the fan blade assembly (2); the first direction and the second direction are perpendicular to each other and are both perpendicular to the axis of rotation of the fan blade assembly (2). Thus, the problems in the prior art of the fan efficiency of a single-centrifugal double-suction fan being relatively low and there being discontinuous aerodynamic noise at an outlet of the volute are solved.

Description

Volute, fan and air conditioner

This application claims priority to a patent application filed with the State Intellectual Property Office of China on May 26, 2023, with application number 202310615109.5 and application name “Volcane, fan and air conditioner”.

Technical Field

The present application relates to the technical field of air conditioning, and in particular to a volute, a fan and an air conditioner.

Background Art

At present, distributed air supply technology has gained a high degree of recognition in the air-conditioning market, but due to the high cost of this technology, it is mainly used in high-end products, which leads to its insufficient market competitiveness.

After long-term research and development, distributed air supply technology has been reduced from the original three fans to a single centrifugal fan with the same technical effect, and has made major breakthroughs in reducing costs and increasing efficiency.

However, due to the large lateral dimensions and low fan efficiency of the single centrifugal distributed air supply system, there is still much room for improvement in fan performance. In order to achieve greater breakthroughs in the goal of reducing costs and increasing efficiency, it is urgent to develop a more competitive single centrifugal distributed air supply system.

Since double-suction centrifugal fans have the characteristics of large flow coefficient and good noise quality, we chose to research and develop a new single centrifugal double-suction fan to improve the performance of centrifugal fans and achieve further cost reduction and efficiency improvement.

However, the high-pressure airflow at the double-suction volute outlet is prone to backflow, which can easily cause eddy loss and backflow loss in the volute, resulting in reduced fan efficiency. At the same time, it will cause discontinuous aerodynamic noise at the volute outlet, resulting in poor sound quality of the air conditioner.

Summary of the invention

The main purpose of the present application is to provide a volute, a fan and an air conditioner to solve the problem of low fan efficiency and discontinuous aerodynamic noise at the volute outlet of the single centrifugal double-suction fan in the prior art.

To achieve the above-mentioned purpose, according to the first aspect of the present application, a volute is provided, comprising: a volute main body, the volute main body comprising a blade mounting portion for mounting a blade assembly and two air duct portions arranged at intervals along a first direction on both sides of the blade mounting portion and both connected to the blade mounting portion, the blade mounting portion being used to mount the blade assembly; a first air duct line and a second air duct line are respectively formed between the relative two sides of each air duct portion arranged at intervals along a second direction and the blade mounting portion, the connection between the side of each air duct portion close to the first air duct line and the blade mounting portion is streamlined, and the connection between the side of each air duct portion close to the second air duct line and the blade mounting portion is a volute tongue; at least one air duct portion is provided with a convex bulge protruding in a direction away from the corresponding air duct portion on the relative two sides of the air duct portion arranged at intervals along the rotation axis of the blade assembly; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the blade assembly.

Furthermore, the bulge includes: an upper surface, which is spaced apart from the air duct portion; a first side surface and a second side surface, which are respectively located on two opposite sides of the upper surface spaced apart along the extension direction of the air duct portion, the first side surface is located on a side of the upper surface away from the fan blade mounting portion, and the second side surface is located on a side of the upper surface close to the fan blade mounting portion; a third side surface and a fourth side surface, which are respectively located on two opposite sides of the upper surface spaced apart along a direction perpendicular to the extension direction of the air duct portion, the third side surface is located on a side of the upper surface close to the first air duct profile line, and the fourth side surface is located on a side of the upper surface close to the second air duct profile line; wherein the upper surface is connected to the outer surface of the air duct portion through the first side surface, the second side surface, the third side surface and the fourth side surface.

Furthermore, the inner wall surface of the convex hull on the side close to the volute tongue is connected to the inner wall surface of the volute body on the side close to the volute tongue.

Further, the calculation formula of the first air duct profile is: y= _A2 +( _A1 - _A2 )/(1+exp(( _xx0 )/p)); wherein, _A1 =-4.87548±1.01258; _A2 =138.4272±1.22718; _x0 =196.19628±1.3696; p=55.53854±1.52501; x is the dimension of the first air duct profile in the second direction with the intersection of a straight line parallel to the second direction and passing through the rotation axis of the fan blade assembly and a side of the volute body close to the first air duct profile as the starting point; y is the dimension of the first air duct profile in the first direction with the rotation axis of the fan blade assembly as the starting point.

Furthermore, the calculation formula of the second duct profile is: l = (0.3 ~ 0.6) L arcsin θ; L is the total length of the duct, 300 ≤ L ≤ 400 mm; θ is the angle between the extension direction of the second duct profile and the second direction, 55° ≤ θ ≤ 65°; l is the length of the second duct profile.

Furthermore, the minimum distance between the bulge and the snail tongue is c, where 0≤c≤5mm; the width of the bulge in the extension direction of the air duct portion is a, where 65mm≤a≤75mm; the length of the bulge in the direction perpendicular to the extension direction of the air duct portion is b, where 65mm≤b≤75mm; the height of the bulge in the direction parallel to the rotation axis of the fan blade assembly is h, where 8mm≤h≤12mm.

Furthermore, the angle between the upper surface and the first side surface is β, wherein 15°≤β≤25; the angle between the upper surface and the second side surface is α, wherein 30°≤α≤40°; and the angle between the upper surface and the fourth side surface is γ, wherein 40°≤γ≤50°.

Further, the inner wall surface of the convex hull on the side away from the volute tongue is connected to the inner wall surface of the volute body on the side away from the volute tongue.

Furthermore, the calculation formula of the second duct profile is: L=(1.8~2.5)l sin θ; L is the total length of the duct, 300≤L≤400mm; θ is the angle between the extension direction of the second duct profile and the second direction, 55°≤θ≤65°; l is the length of the second duct profile.

Furthermore, the minimum distance between the bulge and the snail tongue is c, where 0≤c≤5mm; the width of the bulge in the extension direction of the air duct portion is a, where 65mm≤a≤75mm; the length of the bulge in the direction perpendicular to the extension direction of the air duct portion is b, where 85mm≤b≤95mm; the height of the bulge in the direction parallel to the rotation axis of the fan blade assembly is h, where 8mm≤h≤12mm.

Furthermore, gaps are left between two inner wall surfaces of the convex hull respectively close to the first air duct profile line and the second air duct profile line and the inner wall surface of the volute body.

Furthermore, the calculation formula of the second air duct profile is: L=(1.8~2.5)l sin θ; wherein, L is the total length of the air duct, 300≤L≤400mm; θ is the angle between the extension direction of the second air duct profile and the second direction, 55°≤θ≤65°; l is the length of the second air duct profile.

Furthermore, the minimum distance between the bulge and the snail tongue is c, where 0≤c≤5mm; the width of the bulge in the extension direction of the air duct portion is a, where 65mm≤a≤75mm; the length of the bulge in the direction perpendicular to the extension direction of the air duct portion is b, where 50mm≤b≤60mm; the height of the bulge in the direction parallel to the rotation axis of the fan blade assembly is h, where 8mm≤h≤12mm.

According to a second aspect of the present application, a fan is provided, comprising the above-mentioned volute and a fan blade assembly arranged in the volute.

According to a third aspect of the present application, an air conditioner is provided, comprising the above-mentioned fan.

Applying the technical solution of the present application, the volute of the present application includes: a volute main body, the volute main body includes a blade mounting portion for mounting a blade assembly and two air duct portions arranged at intervals along a first direction on both sides of the blade mounting portion and both connected to the blade mounting portion, the blade mounting portion being used to mount the blade assembly; a first air duct line and a second air duct line are respectively formed between the relative two sides of each air duct portion arranged at intervals along a second direction and the blade mounting portion, the connection between the side of each air duct portion close to the first air duct line and the blade mounting portion is streamlined, and the connection between the side of each air duct portion close to the second air duct line and the blade mounting portion is a volute tongue; at least one air duct portion is provided with a convex bulge protruding in a direction away from the corresponding air duct portion on the relative two sides of the air duct portion arranged at intervals along the rotation axis of the blade assembly; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the blade assembly. In this way, the volute of the present application increases the air volume of the double-suction single centrifugal fan by setting the first duct profile line, the second duct profile line and the convex hull, improves the uneven distribution of air flow velocity in the duct, reduces the aerodynamic noise of the double-suction centrifugal fan, improves the working performance of the centrifugal fan, and adjusts the flow direction of the outlet airflow. It can effectively curb the airflow backflow phenomenon under different wind feeling modes, effectively reduce the vortex in the air duct, reduce airflow loss, improve the noise problems such as surging in the air outlet duct and discontinuous airflow, improve the user's comfort experience, and solve the problems of low fan efficiency and discontinuous aerodynamic noise at the volute outlet of the single centrifugal double-suction fan in the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

FIG1 shows a simplified schematic diagram of an embodiment of a volute according to the present application when a part number is marked;

FIG. 2 shows a simplified schematic diagram of the embodiment of the volute shown in FIG. 1 with another part numbering;

FIG3 shows a partial enlarged view of the volute shown in FIG2 at position P;

FIG4 shows a partial enlarged view of the convex hull of the volute shown in FIG1 ;

FIG5 shows a schematic structural diagram of a fan having the volute shown in FIG1 ;

FIG6 shows an airflow distribution diagram of the air channel portion of the volute in the prior art;

FIG7 shows an airflow distribution diagram of the air channel portion of the embodiment of the volute shown in FIG1 ;

FIG8 shows a cross-sectional view of air flow velocity distribution of the air channel portion of the volute in the prior art;

FIG. 9 is a cross-sectional view showing airflow velocity distribution of the air channel portion of the volute embodiment shown in FIG. 1 .

The above drawings include the following reference numerals:
1. Volute body; 2. Fan blade assembly; 3. Fan blade mounting portion; 4. Air duct portion; 5. First air duct profile; 6. Second air duct profile; 7. Volute tongue;
8. convex hull; 81. upper surface; 82. first side surface; 83. second side surface; 84. third side surface; 85. fourth side surface.

DETAILED DESCRIPTION

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

As shown in Figures 1 to 5, the present application provides a volute, comprising: a volute main body 1, the volute main body 1 comprising a blade mounting portion 3 for mounting a blade assembly 2 and two air duct portions 4 arranged at intervals along a first direction on both sides of the blade mounting portion 3 and both connected to the blade mounting portion 3, the blade mounting portion 3 being used to mount the blade assembly 2; a first air duct line 5 and a second air duct line 6 are respectively formed between the relative two sides of each air duct portion 4 arranged at intervals along a second direction and the blade mounting portion 3, the connection between the side of each air duct portion 4 close to the first air duct line 5 and the blade mounting portion 3 is streamlined, and the connection between the side of each air duct portion 4 close to the second air duct line 6 and the blade mounting portion 3 is a volute tongue 7; at least one air duct portion 4 is provided with a convex bulge 8 protruding in a direction away from the corresponding air duct portion 4 on the relative two sides arranged at intervals along the rotation axis of the blade assembly 2; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the blade assembly 2.

In this way, the volute of the present application increases the air volume of the double-suction single centrifugal fan by setting the first duct profile line 5, the second duct profile line 6 and the convex hull 8, improves the uneven distribution of airflow velocity in the duct, reduces the aerodynamic noise of the double-suction centrifugal fan, improves the working performance of the centrifugal fan, and adjusts the flow direction of the outlet airflow. It can effectively curb the airflow backflow phenomenon under different wind feeling modes, effectively reduce the vortex in the air duct, reduce airflow loss, improve the noise problems such as surging in the air outlet duct and discontinuous airflow, improve the user's comfort experience, and solve the problems of low fan efficiency and discontinuous aerodynamic noise at the volute outlet of the single centrifugal double-suction fan in the prior art.

As shown in Figures 3 and 4, the bulge 8 includes: an upper surface 81, which is spaced apart from the air duct portion 4; a first side surface 82 and a second side surface 83, which are respectively located on two opposite sides of the upper surface 81 spaced apart along the extension direction of the air duct portion 4, the first side surface 82 is located on the side of the upper surface 81 away from the fan blade mounting portion 3, and the second side surface 83 is located on the side of the upper surface 81 close to the fan blade mounting portion 3; a third side surface 84 and a fourth side surface 85, which are respectively located on two opposite sides of the upper surface 81 spaced apart along a direction perpendicular to the extension direction of the air duct portion 4, the third side surface 84 is located on the side of the upper surface 81 close to the first air duct profile 5, and the fourth side surface 85 is located on the side of the upper surface 81 close to the second air duct profile 6; wherein the upper surface 81 is connected to the outer surface of the air duct portion 4 through the first side surface 82, the second side surface 83, the third side surface 84 and the fourth side surface 85.

In the first and second embodiments of the present application, the inner wall surface of the convex hump 8 on the side close to the volute tongue 7 is connected to the inner wall surface of the volute body 1 on the side close to the volute tongue 7 to guide the airflow direction and reduce the mutual impact of the airflow, thereby reducing the vortex in the wind cavity and reducing the surge noise.

In the first embodiment of the present application, the calculation formula of the first duct line 5 is: y= _A2 +( _A1 - _A2 )/(1+exp(( _xx0 )/p)); wherein, _A1 =-4.87548±1.01258; _A2 =138.4272±1.22718; _x0 =196.19628±1.3696; p=55.53854±1.52501; x is the dimension of the first duct line 5 in the second direction, starting from the intersection of a straight line parallel to the second direction and passing through the rotation axis of the fan blade assembly 2 and a side of the volute body 1 close to the first duct line 5; y is the dimension of the first duct line 5 in the first direction, starting from the rotation axis of the fan blade assembly 2.

In the first embodiment of the present application, the calculation formula of the second duct line 6 is: l = (0.3~0.6)L arcsin θ; L is the total length of the duct, 300≤L≤400mm; θ is the angle between the extension direction of the second duct line 6 and the second direction, 55°≤θ≤65°; l is the length of the second duct line 6.

In the first embodiment of the present application, the minimum distance between the bulge 8 and the snail tongue 7 is c, where 0≤c≤5mm; the width of the bulge 8 in the extension direction of the air duct portion 4 is a, where 65mm≤a≤75mm; the length of the bulge 8 in a direction perpendicular to the extension direction of the air duct portion 4 is b, where 65mm≤b≤75mm; the height of the bulge 8 in a direction parallel to the rotation axis of the fan blade assembly 2 is h, where 8mm≤h≤12mm.

In the first embodiment of the present application, the angle between the upper surface 81 and the first side surface 82 is β, wherein 15°≤β≤25; the angle between the upper surface 81 and the second side surface 83 is α, wherein 30°≤α≤40°; the angle between the upper surface 81 and the fourth side surface 85 is γ, wherein 40°≤γ≤50°.

In this way, the performance of the bidirectional centrifugal fan can be effectively improved and the production cost can be reduced. In different wind feeling modes, it can adjust the airflow direction in the air outlet duct and increase the air volume of the fan. In the case of a rear-placed air guide plate with a slightly worse experience, it can also effectively curb the air flow backflow phenomenon and reduce the vortex in the air duct, thereby improving the airflow field in the fan duct, reducing the aerodynamic noise of the fan, making the overall sound quality of the fan better, and improving the user's comfort experience.

In the second embodiment of the present application, the inner wall surface of the convex bulge 8 on the side close to the volute tongue 7 is connected to the inner wall surface of the volute body 1 on the side close to the volute tongue 7, and the inner wall surface of the convex bulge 8 on the side away from the volute tongue 7 is connected to the inner wall surface of the volute body 1 on the side away from the volute tongue 7, so as to adjust the flow direction of the airflow, reduce the mutual impact of the airflow, reduce the vortex in the wind cavity, and thereby reduce the surge noise.

In the second embodiment of the present application, the calculation formula of the second duct profile 6 is: L=(1.8~2.5)l sin θ; L is the total length of the duct, 300≤L≤400mm; θ is the angle between the extension direction of the second duct profile 6 and the second direction, 55°≤θ≤65°; l is the length of the second duct profile 6.

In the second embodiment of the present application, the minimum distance between the convex hull 8 and the volute tongue 7 is c, where 0≤c≤5mm; the width of the convex hull 8 in the extension direction of the air duct portion 4 is a, where 65mm≤a≤75mm; the convex hull 8 is perpendicular to the air duct. The length of the portion 4 in the extension direction is b, wherein 85 mm ≤ b ≤ 95 mm; the height of the convex hump 8 in the direction parallel to the rotation axis of the fan blade assembly 2 is h, wherein 8 mm ≤ h ≤ 12 mm.

In the third embodiment of the present application, gaps are left between the two inner wall surfaces of the convex bulge 8 respectively close to the first air duct profile line 5 and the second air duct profile line 6 and the inner wall surface of the volute body 1 to adjust the airflow direction, reduce the mutual impact of airflows, reduce the vortex in the wind cavity, and thereby reduce surge noise.

In the third embodiment of the present application, the calculation formula of the second duct line 6 is: L=(1.8~2.5)l sin θ; wherein, L is the total length of the duct, 300≤L≤400mm; θ is the angle between the extension direction of the second duct line 6 and the second direction, 55°≤θ≤65°; l is the length of the second duct line 6.

In the third embodiment of the present application, the minimum distance between the bulge 8 and the snail tongue 7 is c, where 0≤c≤5mm; the width of the bulge 8 in the extension direction of the air duct portion 4 is a, where 65mm≤a≤75mm; the length of the bulge 8 in a direction perpendicular to the extension direction of the air duct portion 4 is b, where 50mm≤b≤60mm; the height of the bulge 8 in a direction parallel to the rotation axis of the fan blade assembly 2 is h, where 8mm≤h≤12mm.

As shown in FIG. 5 , the present application provides a fan, comprising the above-mentioned volute and a fan blade assembly 2 disposed in the volute.

Specifically, an air guide plate is also provided in the fan. By controlling the rotation angle of the air guide plate so that the air guide plate is tilted forward to tilt the airflow upward, or the air guide plate is tilted backward to press the airflow downward, a variety of wind feeling experiences can be achieved.

The present application also provides an air conditioner, comprising the above-mentioned fan.

As shown in the airflow distribution diagram of the air duct portion of the volute in the prior art as shown in FIG6 , there are vortices inside the air duct portion and the flow field is unevenly distributed, which can easily cause aerodynamic noise, thereby affecting the performance and overall sound quality of the fan. However, as can be seen from the airflow distribution diagram of the air duct portion of the volute of the present application as shown in FIG7 , the volute of the present application has greatly improved the above-mentioned problem.

As shown in the cross-sectional diagram of the airflow velocity distribution of the air duct portion of the volute in the prior art as shown in FIG8 , the airflow in the air duct will generate backflow, causing backflow loss, which on the one hand reduces the air volume and reduces the work efficiency of the volute; on the other hand, the backflow generates a large aerodynamic noise. As can be seen from the cross-sectional diagram of the airflow velocity distribution of the air duct portion of the volute of the present application as shown in FIG9 , the volute of the present application has greatly improved the above-mentioned problem.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

The volute of the present application includes: a volute main body 1, the volute main body 1 includes a blade mounting portion 3 for mounting a blade assembly 2 and two air duct portions 4 arranged at intervals along a first direction on both sides of the blade mounting portion 3 and both connected to the blade mounting portion 3, the blade mounting portion 3 is used to mount the blade assembly 2; a first air duct line 5 and a second air duct line 6 are respectively formed between the relative two sides arranged at intervals along the second direction of each air duct portion 4 and the blade mounting portion 3, the connection between the side of each air duct portion 4 close to the first air duct line 5 and the blade mounting portion 3 is streamlined, and the connection between the side of each air duct portion 4 close to the second air duct line 6 and the blade mounting portion 3 is a volute tongue 7; at least one air duct portion 4 is provided with a convex bulge 8 protruding in a direction away from the corresponding air duct portion 4 on the relative two sides arranged at intervals along the rotation axis of the blade assembly 2; wherein the first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the blade assembly 2. In this way, the volute of the present application increases the air volume of the double-suction single centrifugal fan and improves the air flow velocity distribution of the air duct by setting the first air duct profile 5, the second air duct profile 6 and the convex hull 8. The uneven phenomenon reduces the aerodynamic noise of the double-suction centrifugal fan, improves the working performance of the centrifugal fan, and adjusts the flow direction of the outlet airflow. It can effectively curb the airflow backflow phenomenon under different wind feeling modes, effectively reduce the vortex in the air duct, reduce air flow loss, improve the noise problems such as surging in the air duct and discontinuous air flow, improve the user's comfort experience, and solve the problems of low fan efficiency and discontinuous aerodynamic noise at the volute outlet of the single centrifugal double-suction fan in the prior art.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and/or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (17)

A volute, characterized by comprising: A volute body (1), the volute body (1) comprising a blade mounting portion (3) for mounting a blade assembly (2) and two air duct portions (4) arranged at intervals on both sides of the blade mounting portion (3) along a first direction and both communicating with the blade mounting portion (3), the blade mounting portion (3) being used to mount the blade assembly (2); A first air duct line (5) and a second air duct line (6) are respectively formed between two opposite sides of each air duct portion (4) arranged at intervals along the second direction and the fan blade mounting portion (3); the connection between the side of each air duct portion (4) close to the first air duct line (5) and the fan blade mounting portion (3) is streamlined, and the connection between the side of each air duct portion (4) close to the second air duct line (6) and the fan blade mounting portion (3) is a volute tongue (7); At least one of the air duct portions (4) is provided with convex bumps (8) protruding in a direction away from the corresponding air duct portion (4) on two opposite sides spaced apart along the rotation axis of the fan blade assembly (2); The first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the fan blade assembly (2). The volute according to claim 1, characterized in that the convex hull (8) comprises: an upper surface (81), the upper surface (81) being spaced apart from the air duct portion (4); a first side surface (82) and a second side surface (83), wherein the first side surface (82) and the second side surface (83) are respectively located on two opposite sides of the upper surface (81) spaced apart along the extension direction of the air duct portion (4), the first side surface (82) being located on a side of the upper surface (81) away from the fan blade mounting portion (3), and the second side surface (83) being located on a side of the upper surface (81) close to the fan blade mounting portion (3); a third side surface (84) and a fourth side surface (85), the third side surface (84) and the fourth side surface (85) being respectively located on two opposite sides of the upper surface (81) spaced apart in a direction perpendicular to the extension direction of the air duct portion (4), the third side surface (84) being located on a side of the upper surface (81) close to the first air duct profile line (5), and the fourth side surface (85) being located on a side of the upper surface (81) close to the second air duct profile line (6); Wherein, the upper surface (81) is connected to the outer surface of the air duct portion (4) through the first side surface (82), the second side surface (83), the third side surface (84) and the fourth side surface (85). The volute according to claim 2 is characterized in that the inner wall surface of the convex bulge (8) on the side close to the volute tongue (7) is connected to the inner wall surface of the volute body (1) on the side close to the volute tongue (7). The volute according to claim 3, characterized in that the calculation formula of the first air duct profile (5) is:
y=A ₂ +(A ₁ -A ₂ )/(1+exp((xx ₀ )/p)); in,
A ₁ = -4.87548 ± 1.01258;
A ₂ =138.4272±1.22718;
x ₀ =196.19628±1.3696;
p = 55.53854 ± 1.52501; x is the dimension of the first duct profile line (5) in the second direction, starting from the intersection of a straight line parallel to the second direction and passing through the rotation axis of the fan blade assembly (2) and a side of the volute body (1) close to the first duct profile line (5); y is the dimension of the first air duct profile (5) in the first direction, starting from the rotation axis of the fan blade assembly (2). The volute according to claim 4, characterized in that the calculation formula of the second air duct profile (6) is: l＝(0.3～0.6)L arcsinθ; wherein, L is the total length of the air duct, 300≤L≤400mm; θ is the angle between the extension direction of the second air duct profile (6) and the second direction, 55°≤θ≤65°; l is the length of the second air duct profile (6). The volute according to claim 4, characterized in that The minimum distance between the convex hull (8) and the volute tongue (7) is c, where 0≤c≤5mm; The width of the convex bump (8) in the extension direction of the air channel portion (4) is a, wherein 65 mm ≤ a ≤ 75 mm; The length of the convex bulge (8) in a direction perpendicular to the extension direction of the air duct portion (4) is b, wherein 65 mm ≤ b ≤ 75 mm; The height of the convex h in a direction parallel to the rotation axis of the fan blade assembly (2) is h, wherein 8 mm ≤ h ≤ 12 mm. The volute according to claim 5, characterized in that The minimum distance between the convex hull (8) and the volute tongue (7) is c, where 0≤c≤5mm; The width of the convex bump (8) in the extension direction of the air channel portion (4) is a, wherein 65 mm ≤ a ≤ 75 mm; The length of the convex bulge (8) in a direction perpendicular to the extension direction of the air duct portion (4) is b, wherein 65 mm ≤ b ≤ 75 mm; The height of the convex h in a direction parallel to the rotation axis of the fan blade assembly (2) is h, wherein 8 mm ≤ h ≤ 12 mm. The volute according to claim 6, characterized in that The angle between the upper surface (81) and the first side surface (82) is β, wherein 15°≤β≤25; The angle between the upper surface (81) and the second side surface (83) is α, wherein 30°≤α≤40°; The included angle between the upper surface (81) and the fourth side surface (85) is γ, wherein 40°≤γ≤50°. The volute according to claim 7, characterized in that The angle between the upper surface (81) and the first side surface (82) is β, wherein 15°≤β≤25; The angle between the upper surface (81) and the second side surface (83) is α, wherein 30°≤α≤40°; The included angle between the upper surface (81) and the fourth side surface (85) is γ, wherein 40°≤γ≤50°. The volute according to claim 3 is characterized in that the inner wall surface of the convex bulge (8) on the side away from the volute tongue (7) is connected to the inner wall surface of the volute body (1) on the side away from the volute tongue (7). The volute according to claim 10, characterized in that the calculation formula of the second air duct profile (6) is:
L = (1.8 ~ 2.5) l sinθ; in, L is the total length of the air duct, 300≤L≤400mm; θ is the angle between the extension direction of the second air duct profile line (6) and the second direction; 55°≤θ≤65°, l is the length of the second air duct profile (6). The volute according to claim 11, characterized in that The minimum distance between the convex hull (8) and the volute tongue (7) is c, where 0≤c≤5mm; The width of the convex bump (8) in the extension direction of the air channel portion (4) is a, wherein 65 mm ≤ a ≤ 75 mm; The length of the convex bulge (8) in a direction perpendicular to the extension direction of the air duct portion (4) is b, wherein 85 mm ≤ b ≤ 95 mm; The height of the convex h in a direction parallel to the rotation axis of the fan blade assembly (2) is h, wherein 8 mm ≤ h ≤ 12 mm. The volute according to claim 2 is characterized in that gaps are left between the two inner wall surfaces of the convex hull (8) respectively close to the first air duct profile line (5) and the second air duct profile line (6) and the inner wall surface of the volute body (1). The volute according to claim 13, characterized in that the calculation formula of the second air duct profile (6) is:
L = (1.8 ~ 2.5) l sinθ; in, L is the total length of the air duct, 300≤L≤400mm; θ is the angle between the extension direction of the second air duct profile line (6) and the second direction, 55°≤θ≤65°; l is the length of the second air duct profile (6). The volute according to claim 14, characterized in that The minimum distance between the convex hull (8) and the volute tongue (7) is c, where 0≤c≤5mm; The width of the convex bump (8) in the extension direction of the air channel portion (4) is a, wherein 65 mm ≤ a ≤ 75 mm; The length of the convex bulge (8) in a direction perpendicular to the extension direction of the air channel portion (4) is b, wherein 50 mm ≤ b ≤ 60 mm; The height of the convex h in a direction parallel to the rotation axis of the fan blade assembly (2) is h, wherein 8 mm ≤ h ≤ 12 mm. A fan, characterized by comprising a volute as claimed in any one of claims 1 to 15 and a fan blade assembly (2) arranged in the volute. An air conditioner, characterized by comprising the fan according to claim 16.