Centrifugal volute, centrifugal fan and air conditioner

Abstract

The utility model discloses a centrifugal volute, a centrifugal fan and an air conditioner, and relates to the technical field of electrical equipment, and the centrifugal volute comprises a volute body and flow guide ribs; the volute body is provided with a mounting cavity, an air inlet and an air outlet, the air inlet communicates with the mounting cavity, and the air outlet communicates with the mounting cavity through an air outlet flow channel; the mounting cavity is used for mounting a wind wheel; the front end surface of the air outlet flow channel is provided with a turning angle; the flow guide ribs are arranged at the turning corners and used for guiding airflow to the air outlet from the turning corners. According to the technical scheme provided by the utility model, the flow loss of airflow in the turning process can be reduced, so that the working efficiency of the whole machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, especially to a centrifugal volute, centrifugal fan and air conditioner. BACKGROUND

[0002] Window machine has huge market due to convenient installation and small use space. The structure of window machine is relatively compact, and indoor and outdoor machines are designed in one body. The outdoor machine side uses axial flow fan, and the indoor machine side uses cross flow or centrifugal fan. The centrifugal fan is widely used due to large air volume and strong pressure resistance.

[0003] In the related art, due to the limitation of the internal structure of the window machine and the asymmetric characteristics of the centrifugal fan, the air outlet of the centrifugal fan is inclined to the right side of the volute. After the airflow flows out from the right side, it needs to be turned by 90 degrees to blow out from the air outlet. Due to the large turning angle, the airflow will have a large flow loss in the turning process, and some flow eddies will be formed, which reduces the working efficiency of the whole machine. SUMMARY

[0004] The main purpose of the utility model is to provide a centrifugal volute, centrifugal fan and air conditioner, which aims to reduce the flow loss of the airflow in the turning process, so as to improve the working efficiency of the whole machine.

[0005] To achieve the above purpose, the utility model provides a centrifugal volute, which comprises:

[0006] The volute body is provided with a mounting cavity, an air inlet and an air outlet. The air inlet is communicated with the mounting cavity, and the air outlet is communicated with the mounting cavity through an air outlet flow channel. The mounting cavity is used for mounting an impeller, and the front end face of the air outlet flow channel is provided with a turning angle.

[0007] The guide rib is arranged at the turning angle, and the guide rib is used for guiding the airflow from the turning angle to the air outlet.

[0008] In an embodiment of the present application, the guide rib is provided with a guide surface, the guide surface is arc transitioned with the turning angle, and the guide surface is used for guiding the airflow from the turning angle to the air outlet.

[0009] In an embodiment of the present application, the guide surface is an arc convex surface.

[0010] In an embodiment of the present application, the guide rib further comprises an extension surface extending to the air outlet, the extension surface is connected with the guide surface, and the included angle between the extension surface and the horizontal plane is θ, which satisfies: θ≤30°.

[0011] In an embodiment of the present application, the extension surface is arc transitioned with the guide surface.

[0012] In one embodiment of this application, the width of the guide rib is defined as d1, which satisfies: d1≥4mm.

[0013] In one embodiment of this application, a plurality of guide ribs are provided, and the plurality of guide ribs are distributed along the width direction of the air outlet.

[0014] In one embodiment of this application, the width of the guide rib is defined as d1, and the spacing between two adjacent guide ribs is defined as d2, then the following condition is satisfied: 0≤d2≤d1.

[0015] In one embodiment of this application, the distance between the highest point of the guide rib and the lowest point of the air outlet on the horizontal plane is defined as d3, and the height of the air outlet is defined as d4, then the following condition is satisfied: d3≤0.1d4.

[0016] In one embodiment of this application, the distance between the farthest end of the guide rib extending towards the air outlet and the front wall surface of the volute body where the air inlet is located is defined as d5, and the distance between the air outlet and the front wall surface is defined as d6, then the following condition is satisfied: d5≥0.5d6.

[0017] In one embodiment of this application, the volute body includes:

[0018] Centrifuge the lower volute;

[0019] The upper centrifugal volute is located above the lower centrifugal volute. The upper centrifugal volute is provided with the air outlet and the air outlet channel, and together with the lower centrifugal volute, it forms the air inlet and the mounting cavity.

[0020] To achieve the above objectives, this utility model also proposes a centrifugal fan, comprising:

[0021] As described above, a centrifugal volute;

[0022] The impeller is located in the mounting cavity of the centrifugal volute.

[0023] To achieve the above objectives, this utility model also proposes an air conditioner, characterized in that it includes a centrifugal fan as described above.

[0024] The technical solution of this utility model involves setting guide ribs in the air outlet channel of the volute body, with a bend at the front end of the air outlet channel. During air outlet operation, the guide ribs can guide the airflow more smoothly from the bend to the outlet, eliminating the low-speed loss area during the forward bend and preventing the formation of flow vortices. This results in smoother airflow, reducing flow losses during the bend and improving the overall efficiency of the machine. Attached Figure Description

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0026] Figure 1 The front view of the centrifugal fan provided by the present application;

[0027] Figure 2 The Figure 1 The sectional view of A-A in the figure;

[0028] Figure 3 The Figure 2 The enlarged view of A' in the figure;

[0029] Figure 4 The top view of the centrifugal fan provided by the present application;

[0030] Figure 5 The structural schematic view of the centrifugal upper volute in the centrifugal fan provided by the present application;

[0031] Figure 6 The structural schematic view of the air conditioner provided by the present application;

[0032] Figure 7 The partial structure explosion view of the air conditioner provided by the present application.

[0033] Explanation of the reference signs:

[0034] Reference Name Reference Name 1000 Air conditioner 121 Flow guide surface 100 Centrifugal fan 122 Extension surface 10 Centrifugal volute 20 Impeller 11 Volute body 200 Bottom plate 11a Mounting cavity 300 Front panel 11b Air inlet 310 Air return 11c Air outlet 320 Machine air outlet 11d Air outlet flow channel 400 Cover 11d1 Bend angle 500 Heat exchanger 111 Centrifugal lower volute 600 Compressor 112 Centrifugal upper volute 700 Motor 12 Flow guide rib

[0035] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0037] It should be noted that if the embodiment of the utility model has the direction indication (such as up, down, left, right, front, back), the direction indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, if the certain posture changes, the direction indication also changes accordingly.

[0038] In addition, if the embodiment of the utility model has the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, "and / or" or "and / or" appears in the whole text, which means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0039] Window machine has huge market due to convenient installation and small use space. The structure of window machine is relatively compact, and indoor and outdoor machines are designed in one body. The outer machine side is mostly used with axial flow fan, and the inner machine side is mostly used with cross flow or centrifugal fan. The centrifugal fan is widely used due to its large air volume and strong pressure resistance.

[0040] In the related art, due to the limitation of the internal structure of the window machine and the asymmetric characteristics of the centrifugal fan, the air outlet of the centrifugal fan is inclined to the right side of the volute. After the airflow flows out from the right side, it needs to be turned by 90 degrees forward to blow out from the air outlet. Due to the large turning angle, the airflow will be accompanied by large flow loss in the turning process, forming some flow eddies, and reducing the working efficiency of the whole machine.

[0041] Based on the above problems, the utility model provides a centrifugal volute 10, which aims to reduce the flow loss of airflow in the turning process, so as to improve the working efficiency of the whole machine. The centrifugal volute 10 is applied to the centrifugal fan 100, and the centrifugal fan 100 can be applied to window machine, vertical air conditioner 1000, hanging air conditioner 1000 and other air conditioning equipment. The centrifugal fan 100 further comprises a fan wheel 20, which is installed in the mounting cavity 11a of the centrifugal volute 10, and under the rotation of the fan wheel 20, the airflow can be driven to flow.

[0042] Please refer to Figures 1 to 5In the embodiment of the utility model, the centrifugal volute 10 comprises a volute body 11 and a flow guide rib 12; the volute body 11 is provided with a mounting cavity 11a, an air inlet 11b and an air outlet 11c, the air inlet 11b is communicated with the mounting cavity 11a, and the air outlet 11c is communicated with the mounting cavity 11a through an air outlet flow channel 11d; the mounting cavity 11a is used for mounting a fan wheel 20, and the front end surface of the air outlet flow channel 11d is provided with a turning angle 11d1; the flow guide rib 12 is arranged at the turning angle 11d1, and the flow guide rib 12 is used for guiding the airflow from the turning angle 11d1 to the air outlet 11c.

[0043] It can be understood that when the centrifugal volute 10 is applied to the centrifugal fan 100, the fan wheel 20 of the centrifugal fan 100 is mounted in the mounting cavity 11a of the centrifugal volute 10. Under the rotation of the fan wheel 20, negative pressure is generated, so that the airflow enters the mounting cavity 11a from the air inlet 11b, and then enters the air outlet flow channel 11d from the mounting cavity 11a, and then is turned forward by a certain angle (such as 90 degrees) at the turning angle 11d1 in the air outlet flow channel 11d, and under the guidance of the flow guide rib 12 in the air outlet flow channel 11d, the airflow is more smoothly guided from the turning angle 11d1 to the air outlet 11c, so as to eliminate the low-speed loss area in the forward turning process of the airflow.

[0044] In the embodiment, the flow guide rib 12 is arranged at the turning angle 11d1, that is, the flow guide rib 12 is arranged on the front end surface of the air outlet flow channel 11d, so that the flow guide rib 12 is connected with the turning angle 11d1, and the airflow can be better guided from the turning angle 11d1 to the air outlet 11c.

[0045] In actual application, the flow guide rib 12 can be integrally formed on the front end surface of the air outlet flow channel 11d, or can be connected to the front end surface of the air outlet flow channel 11d by means of bonding, screw connection and the like.

[0046] In actual application, the flow guide rib 12 can be designed in a straight line type, an arc shape or other shapes, as long as the airflow can be guided from the turning angle 11d1 to the air outlet 11c.

[0047] In addition, the flow guide rib 12 can guide the airflow from the turning angle 11d1 to the air outlet 11c through an arc surface or a plane.

[0048] In summary, the technical scheme of the utility model discloses a guide rib 12 is arranged in the air outlet flow channel 11d of the volute body 11, the front end surface of the air outlet flow channel 11d is equipped with a turning angle 11d1, and the guide rib 12 is arranged at the turning angle 11d1.In the air outlet process, the guide rib 12 can guide the airflow from the turning angle 11d1 to the air outlet 11c more smoothly, can eliminate the low-speed loss area of the airflow in the forward turning process, avoids the formation of flow vortex, makes the airflow flow more smoothly, thereby reducing the flow loss of the airflow in the turning process, and improving the working efficiency of the whole machine.

[0049] Please refer to Figure 3 In an embodiment of the utility model, the guide rib 12 is equipped with a guide surface 121, the guide surface 121 is arc transition with the turning angle 11d1, and the guide surface 121 is used to guide the airflow from the turning angle 11d1 to the air outlet 11c.

[0050] In this way, by making the guide surface 121 of the guide rib 12 arc transition with the turning angle 11d1, when the airflow flows through the turning angle 11d1, the airflow can be more smoothly and uniformly transitioned to the air outlet 11c through the guide surface 121, the low-speed loss area of the airflow in the forward turning process can be further eliminated, thereby further reducing the flow loss of the airflow in the turning process, to further improve the working efficiency of the whole machine.

[0051] In actual application, the guide surface 121 of the guide rib 12 can be designed as an arc convex surface, can be designed as an arc concave surface, or can be designed as an inclined surface, as long as the airflow can be smoothly guided from the turning angle 11d1 to the air outlet 11c.

[0052] Please refer to Figure 3 In an embodiment of the utility model, the guide surface 121 can be designed as an arc convex surface.

[0053] In this way, the design of the arc convex surface can more smoothly and uniformly transition the airflow to the air outlet 11c, can effectively eliminate the low-speed loss area of the airflow in the forward turning process, thereby further reducing the flow loss of the airflow in the turning process, so that the working efficiency of the whole machine is further improved.

[0054] Please refer to Figure 3 In an embodiment of the utility model, the guide rib 12 further includes an extension surface 122 extending to the air outlet 11c, the extension surface 122 is connected with the guide surface 121, the included angle between the extension surface 122 and the horizontal plane is θ, and θ satisfies: θ≤30°.

[0055] In this way, when the air flow passes through the turning corner 11d1, the air flow can pass through the guide surface 121 and the extension surface 122 of the guide fin 12 in sequence, and the air flow can be more smoothly guided from the turning corner 11d1 to the air outlet 11c, so that the flow loss of the air flow in the turning process is effectively reduced, and the working efficiency of the whole machine is improved. When the angle θ between the extension surface 122 of the guide fin 12 and the horizontal plane is too large, the guide fin 12 cannot guide the air flow, and the air flow is blocked. Therefore, by controlling the angle θ between the extension surface 122 of the guide fin 12 and the horizontal plane to be less than or equal to 30°, the guide fin 12 can have a good guiding effect.

[0056] As some examples, the angle θ between the extension surface 122 and the horizontal plane can be 5°, 10°, 12°, 15°, 20°, 25°, 27°, 30°, etc.

[0057] Please refer to Figure 3 In an embodiment of the present application, the extension surface 122 and the guide surface 121 are arc transitioned.

[0058] In this way, by arc transitioning the extension surface 122 and the guide surface 121 of the guide fin 12, when the air flow passes through the guide surface 121, the air flow can pass through the extension surface 122 more smoothly, so that the air flow can be more smoothly and uniformly transitioned to the air outlet 11c, and the low-speed loss area of the air flow in the forward turning process can be further eliminated, so that the flow loss of the air flow in the turning process is further reduced, and the working efficiency of the whole machine is further improved.

[0059] Please refer to Figure 4 In an embodiment of the present application, the width of the guide fin 12 is defined as d1, and d1≥4mm.

[0060] In this way, since the centrifugal volute 10 is usually a foam material, that is, the volute body 11 and the guide fin 12 are both foam materials, in order to ensure the strength of the guide fin 12, the width of the guide fin 12 should not be designed to be too small. Therefore, by controlling the width of the guide fin 12 to be greater than or equal to 4mm, the strength of the guide fin 12 can be effectively ensured, and the risk of breakage of the guide fin 12 under the impact of the air flow or during installation can be avoided.

[0061] As some examples, the width d1 of the guide fin 12 can be 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, etc.

[0062] Please refer to Figure 1 , Figure 4 , Figure 5In an embodiment of the present application, the plurality of flow guide ribs 12 are arranged along the width direction of the air outlet 11c.

[0063] In this way, by arranging the plurality of flow guide ribs 12 along the width direction of the air outlet 11c, the plurality of flow guide ribs 12 can guide the airflow to flow more smoothly from the turning corner 11d1 to the air outlet 11c during the air outlet process, so that the airflow flows more smoothly, thereby reducing the flow loss of the airflow during the turning process and improving the working efficiency of the whole machine.

[0064] In actual application, the adjacent two flow guide ribs 12 can have a gap or no gap. When the adjacent two flow guide ribs 12 have a gap, the plurality of flow guide ribs 12 can form a sawtooth structure; when the adjacent two flow guide ribs 12 have no gap, the plurality of flow guide ribs 12 can form a continuous flow guide protrusion.

[0065] Please refer to Figure 4 In an embodiment of the present application, the width of the flow guide rib 12 is defined as d1, and the spacing between the adjacent two flow guide ribs 12 is defined as d2, and it satisfies: 0≤d2≤d1.

[0066] In this way, since the number of flow guide ribs 12 should not be too small or too large. When the number of flow guide ribs 12 is too small, the airflow cannot be evenly diffused to the entire air outlet 11c; and when the number of flow guide ribs 12 is too large, the density of the flow guide ribs 12 will be too small, which will increase the flow loss during the air outlet process. Therefore, by controlling the relationship between the spacing d2 between the adjacent two flow guide ribs 12 and the width d1 of the flow guide rib 12 within the range of d2=0~d1, the number of flow guide ribs 12 can be designed within an appropriate range, so that the density of the flow guide ribs 12 is more appropriate, which can reduce the flow loss during the air outlet process.

[0067] As some examples, the spacing d2 between the adjacent two flow guide ribs 12 can be 0, 0.2d1, 0.5d1, 0.6d1, 0.7d1, 0.8d1, 0.9d1, d1, etc.

[0068] It can be understood that when the spacing d2 between the adjacent two flow guide ribs 12 is equal to 0, the plurality of flow guide ribs 12 can form a continuous flow guide protrusion; when the spacing d2 between the adjacent two flow guide ribs 12 is not equal to 0, the plurality of flow guide ribs 12 can form a sawtooth structure, so that the designed flow guide rib 12 can play a role in noise reduction.

[0069] Please refer to Figure 1In an embodiment of the utility model, define the distance between the highest point of the flow guide rib 12 and the lowest point of the air outlet 11c as d3, the height of the air outlet 11c as d4, then satisfy: d3≤0.1d4.

[0070] Thus, when the height of the flow guide rib 12 relative to the lowest point of the air outlet 11c is too high, the flow guide rib 12 will block the airflow, causing negative effects, therefore, by controlling the relationship between the distance d3 between the highest point of the flow guide rib 12 and the lowest point of the air outlet 11c and the height d4 of the air outlet 11c as d3 less than or equal to 0.1d4, the height of the flow guide rib 12 relative to the lowest point of the air outlet 11c can be effectively controlled to ensure the flow guiding effect of the flow guide rib 12.

[0071] As some examples, the relationship between the distance d3 between the highest point of the flow guide rib 12 and the lowest point of the air outlet 11c and the height d4 of the air outlet 11c can be 0.1d4, 0.09d4, 0.08d4, 0.07d4, 0.06d4, 0.05d4, 0.04d4, 0.03d4, 0.02d4, 0.01d4, etc.

[0072] Please refer to Figure 3 In an embodiment of the utility model, define the distance between the last end of the flow guide rib 12 extending to the air outlet 11c and the front wall surface of the volute body 11 provided with the air inlet 11b as d5, the distance between the air outlet 11c and the front wall surface as d6, then satisfy: d5≥0.5d6.

[0073] Thus, by controlling the relationship between the distance d5 between the last end of the flow guide rib 12 extending to the air outlet 11c and the front wall surface of the volute body 11 provided with the air inlet 11b and the distance d6 between the air outlet 11c and the front wall surface as d5 greater than or equal to 0.5d6, the airflow can be better guided from the turning angle 11d1 to the air outlet 11c by the flow guide rib 12, and the flow guide rib 12 can have good flow guiding effect.

[0074] As some examples, the relationship between the distance d5 between the last end of the flow guide rib 12 extending to the air outlet 11c and the front wall surface of the volute body 11 provided with the air inlet 11b and the distance d6 between the air outlet 11c and the front wall surface can be d5=0.5d6, 0.6d6, 0.7d6, 0.8d6, 0.9d6, d6, 1.1d6, 1.2d6, etc.

[0075] It should be noted that the last end of the flow guide rib 12 extending to the air outlet 11c refers to the end of the flow guide rib 12 away from the turning angle 11d1.

[0076] Please refer to Figure 1 In an embodiment of the present application, the volute body 11 comprises a centrifugal lower volute 111 and a centrifugal upper volute 112; the centrifugal upper volute 112 is arranged above the centrifugal lower volute 111, and is provided with an air outlet 11c and an air outlet flow channel 11d, and forms an air inlet 11b and a mounting cavity 11a together with the centrifugal lower volute 111.

[0077] In this way, during assembly, the fan wheel 20 can be first mounted on the centrifugal lower volute 111, and then the centrifugal upper volute 112 is arranged on the centrifugal lower volute 111, so that the centrifugal upper volute 112 and the centrifugal lower volute 111 form a mounting cavity 11a for accommodating the fan wheel 20, which makes it more convenient to mount the fan wheel 20 in the mounting cavity 11a of the volute body 11. In addition, the centrifugal upper volute 112 is provided with an air outlet 11c and an air outlet flow channel 11d, and after the airflow flows out of the mounting cavity 11a, it flows upward to the air outlet flow channel 11d, and then turns a certain angle (such as 90 degrees) forward in the air outlet flow channel 11d, and under the guidance of the flow guide ribs 12 in the air outlet flow channel 11d, the airflow can be more smoothly guided to the air outlet 11c from the turning angle 11d1.

[0078] In actual application, the centrifugal upper volute 112 and the centrifugal lower volute 111 can be detachably connected by screws, buckles or the like.

[0079] Please refer to Figures 1 to 4 The present application also provides a centrifugal fan 100, which comprises a centrifugal volute 10 and a fan wheel 20. The specific structure of the fan wheel 20 is referred to the above embodiments. Since the centrifugal fan 100 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The fan wheel 20 is arranged in the mounting cavity 11a of the centrifugal volute 10.

[0080] It can be understood that under the rotation of the fan wheel 20, negative pressure is generated, so that the airflow enters the mounting cavity 11a from the air inlet 11b, and then enters the air outlet flow channel 11d from the mounting cavity 11a. Under the guidance of the flow guide ribs 12 in the air outlet flow channel 11d, the airflow can be more smoothly guided to the air outlet 11c from the turning angle 11d1, which can eliminate the low-speed loss area in the process of turning forward, avoid the formation of flow vortex, make the airflow flow more smoothly, thereby reducing the flow loss in the process of turning, and improving the working efficiency of the whole machine.

[0081] Please refer to Figure 6 , Figure 7The utility model also proposes a kind of air conditioner 1000, the air conditioner 1000 includes centrifugal fan 100, the specific structure of the centrifugal fan 100 refers to above-mentioned embodiment, since the air conditioner 1000 of the utility model adopts all technical solutions of above-mentioned embodiment, thus at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer repeat.

[0082] In actual application, air conditioner 1000 can be window machine, also can be vertical air conditioner 1000, hanging air conditioner 1000 and so on.

[0083] In an embodiment, air conditioner 1000 can also include bottom plate 200, front panel 300, outer cover 400, heat exchanger 500, compressor 600 and motor 700. Wherein, front panel 300 is located at the front side of bottom plate 200, and front panel 300 is provided with return air inlet 310 and whole machine air outlet 320;Outer cover 400 is covered on bottom plate 200 and is located at the rear side of front panel 300, and outer cover 400 and bottom plate 200 and front panel 300 form a cavity;Centrifugal fan 100 is installed in the cavity;Heat exchanger 500 is installed in the cavity and is located between front panel 300 and centrifugal fan 100;Compressor 600 is installed in the cavity;Motor 700 is installed in the cavity and is in transmission connection with impeller 20 of centrifugal fan 100, and motor 700 is used to drive impeller 20 to rotate.

[0084] When motor 700 drives impeller 20 to rotate, negative pressure can be generated in the installation cavity 11a of centrifugal fan 100, under the action of negative pressure, external air enters from return air inlet 310 of front panel 300, airflow flows through heat exchanger 500 for heat exchange and then enters installation cavity 11a from air inlet 11b of volute body 11, after airflow flows out from installation cavity 11a, it flows upward to air outlet flow channel 11d, and then turns a certain angle (such as 90 degrees) forward in air outlet flow channel 11d, and under the guidance of guide rib 12, airflow can be more smoothly guided to air outlet 11c from turning angle 11d1, and finally flows out from whole machine air outlet 320, which can eliminate the low-speed loss area in the process of airflow turning forward, avoid the formation of flow vortex, make the flow of airflow more smoothly, thereby reducing the flow loss of airflow in the process of turning, and improving the working efficiency of whole machine.

[0085] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A centrifugal volute, characterized by, The volute body is provided with a mounting cavity, an air inlet and an air outlet, the air inlet is communicated with the mounting cavity, and the air outlet is communicated with the mounting cavity through an air outlet flow channel; the mounting cavity is used for mounting an impeller, and a front end surface of the air outlet flow channel is provided with a turning angle; A guide rib is arranged at the turning angle, and the guide rib is used for guiding air flow from the turning angle to the air outlet. The guide rib is provided with a guide surface, the guide surface is arc transitioned with the turning angle, and the guide surface is used for guiding air flow from the turning angle to the air outlet.

2. The centrifugal volute of claim 1, wherein, The guide surface is an arc convex surface.

3. The centrifugal volute of claim 2, wherein, The guide rib further includes an extension surface extending to the air outlet, the extension surface is connected with the guide surface, an included angle between the extension surface and a horizontal plane is θ, and θ≤30° is met.

4. The centrifugal volute of claim 2, wherein, The extension surface is arc transitioned with the guide surface.

5. The centrifugal volute of claim 4, wherein, The width of the guide rib is defined as d1, and d1≥4mm is met.

6. The centrifugal volute of any one of claims 1 to 5, wherein, A plurality of guide ribs are arranged, and the plurality of guide ribs are distributed along the width direction of the air outlet.

7. The centrifugal volute of any one of claims 1 to 5, wherein, The width of the guide rib is defined as d1, the spacing between two adjacent guide ribs is defined as d2, and 0≤d2≤d1 is met.

8. The centrifugal volute of claim 7, wherein, The distance between the highest point of the guide rib and the horizontal plane on which the lowest point of the air outlet is located is defined as d3, the height of the air outlet is defined as d4, and d3≤0.1d4 is met.

9. The centrifugal volute of any one of claims 1 to 5, wherein, The distance between the last end of the guide rib extending to the air outlet and the front wall surface of the volute body provided with the air inlet is defined as d5, the distance between the air outlet and the front wall surface is defined as d6, and d5≥0.5d6 is met.

10. The centrifugal volute of any one of claims 1 to 5, wherein, The volute body includes:

11. The centrifugal volute of any one of claims 1 to 5, wherein, A centrifugal lower volute; A centrifugal upper volute arranged above the centrifugal lower volute, the centrifugal upper volute is provided with the air outlet and the air outlet flow channel, and the centrifugal upper volute and the centrifugal lower volute enclose the air inlet and the mounting cavity. The centrifugal volute includes:

12. A centrifugal fan characterized by The centrifugal volute according to any one of claims 1 to 11; An impeller arranged in the mounting cavity of the centrifugal volute. The centrifugal fan includes the centrifugal volute according to claim 12.

13. An air conditioner characterized by comprising: ​

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