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 mounting cavity is provided with a central axis, two sides of the central axis of the mounting cavity are defined as a first side and a second side respectively, and the central axis of the air outlet is located on the first side; the flow guide ribs are arranged in the air outlet flow channel and used for guiding air flow to the second side from the first side. According to the technical scheme provided by the utility model, the flow loss in the air outlet process can be reduced, so that the overall efficiency 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 mostly uses axial flow fan, and the indoor machine side mostly uses cross flow or centrifugal fan. The centrifugal fan is widely used due to its 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 forward and diffused to the left side to ensure that there is strong airflow along the direction of the air outlet. However, the current centrifugal fan has large energy loss, resulting in low overall machine efficiency. SUMMARY

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

[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 mounting cavity has a central axis. The first side and the second side are defined on both sides of the central axis of the mounting cavity, and the central axis of the air outlet is located on the first side.

[0007] The guide rib is arranged in the air outlet flow channel, and one end of the guide rib away from the mounting cavity is inclined toward the second side to guide the airflow from the first side to the second side.

[0008] In an embodiment of the application, the guide rib is arc-shaped.

[0009] In an embodiment of the application, the guide rib is arranged on the rear end surface of the air outlet flow channel.

[0010] In an embodiment of the application, the rear end surface of the air outlet flow channel is provided with a guide surface, and the guide surface is inclined toward the front of the volute body.

[0011] In an embodiment of the application, the width of the guide rib is defined as w, and w≥4mm is satisfied.

[0012] In an embodiment of the application, an angle between a deflection angle of the guide vane near an end of the installation cavity and a horizontal plane is defined as θ1, and 45°≤θ1≤90° is satisfied;

[0013] And / or, an angle between a deflection angle of the guide vane away from an end of the installation cavity and a horizontal plane is defined as θ2, and 0°≤θ2≤60° is satisfied.

[0014] In an embodiment of the application, a plurality of guide vanes are provided, and the plurality of guide vanes are distributed along a width direction of the air outlet.

[0015] In an embodiment of the application, a distance between two adjacent guide vanes is defined as d1, and a width of the air outlet is defined as d2, and 0.1d2≤d1≤0.3d2 is satisfied.

[0016] In an embodiment of the application, the volute body comprises:

[0017] A centrifugal lower volute;

[0018] A centrifugal upper volute arranged above the centrifugal lower volute, the centrifugal upper volute being provided with the air outlet and the air outlet flow channel, and the centrifugal upper volute and the centrifugal lower volute together form the air inlet and the installation cavity.

[0019] To achieve the above object, the utility model also provides a centrifugal fan, which comprises:

[0020] The centrifugal volute as above;

[0021] A fan wheel arranged in the installation cavity of the centrifugal volute.

[0022] In an embodiment of the application, a radius of the fan wheel is defined as R1, and a distance between an end of the guide vane near the fan wheel and a rotation center of the fan wheel is defined as R2, and R2-R1≥5mm is satisfied.

[0023] To achieve the above object, the utility model also provides an air conditioner, which comprises the centrifugal fan as above.

[0024] The technical scheme of the utility model sets the guide vane in the air outlet flow channel of the volute body, and an end of the guide vane away from the installation cavity is inclined towards the second side. In the air outlet process, the guide vane can guide the airflow to deflect naturally towards the second side in the flowing-out process, so that the airflow flows out of the installation cavity and deflects from the first side to the second side more smoothly, the airflow flows more smoothly, and thus the flow loss in the air outlet process can be reduced, the overall machine efficiency is improved, and the air outlet uniformity is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description 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 volute provided by the present application is shown in one embodiment.

[0027] Figure 2 The cross-sectional view of the centrifugal volute provided by the present application is shown in one embodiment. Figure 1 The cross-sectional view of the centrifugal volute provided by the present application is shown in one embodiment.

[0028] Figure 3 The top view of the centrifugal volute provided by the present application is shown in one embodiment.

[0029] Figure 4 The structural schematic diagram of the centrifugal upper volute in the centrifugal volute provided by the present application is shown in one embodiment.

[0030] Figure 5 The front view of the centrifugal fan provided by the present application is shown in one embodiment.

[0031] Figure 6 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment. Figure 5 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment.

[0032] Figure 7 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment. Figure 5 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment.

[0033] Figure 8 The top view of the centrifugal fan provided by the present application is shown in one embodiment.

[0034] Figure 9 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment. Figure 8 The cross-sectional view of the centrifugal fan provided by the present application is shown in one embodiment.

[0035] Figure 10 The structural schematic diagram of the air conditioner provided by the present application is shown in one embodiment.

[0036] Figure 11 The partial structure explosion diagram of the air conditioner provided by the present application is shown in one embodiment.

[0037] Explanation of the drawing reference numerals:

[0038] Reference Name Reference Name 1000 Air conditioner 112 Centrifugal upper volute 100 Centrifugal fan 12 Guide rib 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 Flow guide surface 500 Heat exchanger a First side 600 Compressor b Second side 700 Motor 111 Centrifugal lower volute

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0042] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, 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" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and 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 present application.

[0043] Window machines have a huge market due to convenient installation and small use space. The structure of the window machine is relatively compact, and the indoor and outdoor machines are designed in one body. The outer machine side mostly uses an axial flow fan, and the inner machine side mostly uses a cross-flow or centrifugal fan. Among them, the centrifugal fan is widely used due to its large air volume and strong pressure resistance.

[0044] In related technologies, 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 biased 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 and diffused to the left side to ensure that there is strong airflow along the direction of the air outlet. However, the current centrifugal fan has a large energy loss, resulting in low efficiency of the whole machine.

[0045] Based on the above problems, the utility model provides a centrifugal volute, aims at reducing the flow loss in the air outlet process, to improve the whole machine efficiency. The centrifugal volute is applied to the centrifugal fan, and the centrifugal fan can be applied to the window machine, the vertical air conditioner, the hanging air conditioner and other air conditioning equipment. The centrifugal fan further includes a wind wheel, and the wind wheel is installed in the mounting cavity of the centrifugal volute. Under the rotation of the wind wheel, the airflow can be driven to flow.

[0046] Please refer to Figures 1 to 4 In an embodiment of the utility model, the centrifugal volute 10 includes 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 wind wheel 20. The mounting cavity 11a has a central axis, and the first side a and the second side b are defined on both sides of the central axis of the mounting cavity 11a. The central axis of the air outlet 11c is located on the first side a. The flow guide rib 12 is arranged in the air outlet flow channel 11d. The end of the flow guide rib 12 away from the mounting cavity 11a is inclined towards the second side b, and is used for guiding the airflow from the first side a to the second side b.

[0047] It can be understood that when the centrifugal volute 10 is applied to the centrifugal fan 100, the wind wheel 20 of the centrifugal fan 100 is installed in the mounting cavity 11a of the centrifugal volute 10, and the central axis of the mounting cavity 11a coincides with the central axis of the wind wheel 20. Under the rotation of the wind 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 rib 12 in the air outlet flow channel 11d, the airflow is uniformly diffused from the first side a to the second side b, and finally blown out from the air outlet 11c. The uniformity of the air outlet can be improved.

[0048] It should be noted that the first side a can be the right side of the volute body 11, and the second side b can be the left side of the volute body 11. In the air outlet process, the flow guide rib 12 can guide the airflow to naturally deflect to the left side during the outflow process, so that the airflow flows out of the mounting cavity 11a more smoothly and deflects from the right side to the left side. The flow of the airflow is more smooth, so that the flow loss in the air outlet process can be reduced.

[0049] In actual application, the flow guide rib 12 can be designed in an arc shape, a straight line type or other shapes, as long as it can guide the airflow from the first side a to the second side b.

[0050] And, the guide fin 12 can be arranged on the rear end surface of the air outlet flow channel 11d, or can be arranged on the front end surface of the air outlet flow channel 11d. It should be noted that the rear end surface of the air outlet flow channel 11d refers to the end surface away from the air outlet 11c, and the front end surface of the air outlet flow channel 11d refers to the end surface close to the air outlet 11c.

[0051] In summary, the technical scheme of the utility model sets the guide fin 12 in the air outlet flow channel 11d of the volute body 11, and the end of the guide fin 12 away from the mounting cavity 11a is inclined towards the second side b. During the air outlet process, the guide fin 12 can guide the airflow to naturally deflect towards the second side b during the outflow process, so that the airflow flows more smoothly from the mounting cavity 11a and deflects from the first side a to the second side b, so that the airflow flows more smoothly, thereby reducing the flow loss during the air outlet process and improving the overall efficiency. Meanwhile, the air outlet uniformity can also be improved.

[0052] Please refer to Figure 1 In an embodiment of the utility model, the guide fin 12 can be designed in an arc shape.

[0053] In this way, compared with a linear or other shape design, by designing the guide fin 12 in an arc shape, the airflow can be more smoothly guided towards the second side b when flowing through the arc-shaped guide fin 12, so that the airflow flows more smoothly, thereby further reducing the flow loss during the air outlet process and further improving the overall efficiency.

[0054] Please refer to Figure 2 In an embodiment of the utility model, the guide fin 12 is arranged on the rear end surface of the air outlet flow channel 11d.

[0055] In this way, the guide fin 12 can guide the airflow to naturally deflect towards the second side b during the rising process, so that the airflow flows more smoothly and the flow loss can be further reduced, and the power of the fan 20 can be reduced.

[0056] In actual application, the guide fin 12 can be integrally formed on the rear end surface of the air outlet flow channel 11d, or can be connected to the rear end surface of the air outlet flow channel 11d by means of bonding, screw connection, etc.

[0057] Please refer to Figures 2 to 4 In an embodiment of the utility model, the rear end surface of the air outlet flow channel 11d is provided with a guide surface 11d1, and the guide surface 11d1 is inclined towards the front of the volute body 11.

[0058] In this way, by arranging the guide surface 11d1 inclined towards the front of the volute body 11 on the rear end surface of the air outlet flow channel 11d, when the airflow is deflected naturally to the second side b in the rising process, the airflow can be guided forward in cooperation with the inclined guide surface 11d1, so that the airflow flows more smoothly, and the flow loss and the power of the wind wheel 20 can be further reduced.

[0059] In actual application, the guide surface 11d1 can be an arc surface or a plane, as long as it can guide the airflow forward.

[0060] Please refer to Figure 1 In an embodiment of the utility model, the width of the guide fin 12 is defined as w, and w is greater than or equal to 4mm.

[0061] In this way, since the centrifugal volute 10 is usually made of foam material, that is, the volute body 11 and the guide fin 12 are both made of foam material, in order to ensure the strength of the guide fin 12 itself, the width of the guide fin 12 should not be designed too small, and then by controlling the width of the guide fin 12 to be greater than or equal to 4mm, the strength of the guide fin 12 itself can be effectively ensured, and the risk of breakage of the guide fin 12 under the impact of the airflow or during installation can be avoided.

[0062] As some examples, the width w 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.

[0063] Please refer to Figure 1 In an embodiment of the utility model, the angle between the deflection angle of one end of the guide fin 12 close to the mounting cavity 11a and the horizontal plane is defined as θ1, and 45°≤θ1≤90°; and / or, the angle between the deflection angle of one end of the guide fin 12 away from the mounting cavity 11a and the horizontal plane is defined as θ2, and 0°≤θ2≤60°.

[0064] In this way, since when the angle θ1 between the deflection angle of one end of the guide fin 12 close to the mounting cavity 11a and the horizontal plane is too large or too small, the guide effect of the guide fin 12 on the airflow will be affected; similarly, when the angle θ2 between the deflection angle of one end of the guide fin 12 away from the mounting cavity 11a and the horizontal plane is too large, the guide effect of the guide fin 12 on the airflow will also be affected. Therefore, by controlling the angle θ1 between the deflection angle of one end of the guide fin 12 close to the mounting cavity 11a and the horizontal plane to be between 45° and 90°, and controlling the angle θ2 between the deflection angle of one end of the guide fin 12 away from the mounting cavity 11a and the horizontal plane to be between 0° and 60°, the guide fin 12 can maintain good guide effect.

[0065] As some examples, the included angle θ1 between the deflection angle of the deflector rib 12 near one end of the mounting cavity 11a and the horizontal plane can be 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0066] The included angle θ2 between the deflection angle of the deflector rib 12 away from one end of the mounting cavity 11a and the horizontal plane can be 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.

[0067] Referring to Figure 1 In an embodiment of the present application, the deflector rib 12 is provided in plurality, and the plurality of deflector ribs 12 are distributed along the width direction of the air outlet 11c.

[0068] In this way, by providing the plurality of deflector ribs 12 along the width direction of the air outlet 11c, in the air outlet process, the plurality of deflector ribs 12 can simultaneously guide the airflow to naturally deflect to the second side b in the flowing-out process, so that the airflow flows more smoothly from the mounting cavity 11a and deflects from the first side a to the second side b, so that the airflow flows more smoothly, thereby reducing the flow loss in the air outlet process and improving the overall efficiency, and further improving the air outlet uniformity. In addition, by distributing the plurality of deflector ribs 12 at intervals, the plurality of deflector ribs 12 form a sawtooth structure, thereby playing a role in noise reduction.

[0069] Referring to Figure 1 In an embodiment of the present application, the distance between the two adjacent deflector ribs 12 is defined as d1, and the width of the air outlet 11c is d2, then it satisfies: 0.1d2≤d1≤0.3d2.

[0070] In this way, since the number of deflector ribs 12 should not be too small or too large. When the number of deflector ribs 12 is too small, the airflow cannot be uniformly diffused to the entire air outlet 11c; and when the number of deflector ribs 12 is too large, it will result in a small density of the deflector ribs 12, which will increase the flow loss in the air outlet process. Therefore, by controlling the relationship between the distance d1 between the two adjacent deflector ribs 12 and the width d2 of the air outlet 11c to be d1=0.1d2~0.3d2, the number of deflector ribs 12 can be designed within a suitable range, so that the density of the deflector ribs 12 is more appropriate, which can reduce the flow loss in the air outlet process.

[0071] As some examples, the relationship between the spacing d1 between two adjacent guide vanes 12 and the width d2 of the air outlet 11c can be d1=0.1d2, 0.15d2, 0.18d2, 0.2d2, 0.25d2, 0.28d2, 0.3d2, etc.

[0072] Referring 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 the centrifugal upper volute 112 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.

[0073] 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 easier 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 guide vanes 12 and the guide surface 11d1, the airflow flows more smoothly from the first side a to the second side b, thereby improving the uniformity of the air outlet.

[0074] In actual application, the centrifugal upper volute 112 and the centrifugal lower volute 111 can be detachably connected by screws, buckles, etc.

[0075] Referring to Figures 5 to 9 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 centrifugal volute 10 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.

[0076] 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 guide vanes 12 in the air outlet flow channel 11d, the airflow uniformly diffuses from the first side a to the second side b, and finally blows out from the air outlet 11c. This not only improves the uniformity of the air outlet, but also makes the airflow flow more smoothly, thereby reducing the flow loss during the air outlet process.

[0077] Please refer to Figure 5 In an embodiment of the present application, the radius of the wind wheel 20 is defined as R1, and the distance between the end of the guide fin 12 close to the wind wheel 20 and the rotation center of the wind wheel 20 is defined as R2, and R2-R1≥5mm is satisfied.

[0078] In this way, since the wind wheel 20 rotates relative to the guide fin 12 during operation, by controlling the difference between the distance R2 between the end of the guide fin 12 close to the wind wheel 20 and the rotation center of the wind wheel 20 and the radius R1 of the wind wheel 20 to be greater than or equal to 5mm, a sufficient safety distance between the guide fin 12 and the wind wheel 20 can be ensured, and the knocking between the wind wheel 20 and the guide fin 12 and the noise caused by dynamic and static interference can be effectively prevented.

[0079] As some examples, the difference between the distance R2 between the end of the guide fin 12 close to the wind wheel 20 and the rotation center of the wind wheel 20 and the radius R1 of the wind wheel 20 can be 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, etc.

[0080] Please refer to Figure 10 、 Figure 11 The present application also provides an air conditioner 1000, which comprises the centrifugal fan 100, and the specific structure of the centrifugal fan 100 is referred to the above embodiments. Since the air conditioner 1000 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.

[0081] In actual application, the air conditioner 1000 can be a window air conditioner, a vertical air conditioner 1000, a hanging air conditioner 1000, etc.

[0082] In an embodiment, the air conditioner 1000 can further comprise a bottom plate 200, a front panel 300, an outer cover 400, a heat exchanger 500, a compressor 600 and a motor 700. The front panel 300 is arranged on the front side of the bottom plate 200, and the front panel 300 is provided with an air return port 310 and an air outlet 320. The outer cover 400 is arranged on the bottom plate 200 and located at the rear side of the front panel 300, and the outer cover 400, the bottom plate 200 and the front panel 300 form a cavity. The centrifugal fan 100 is installed in the cavity. The heat exchanger 500 is installed in the cavity and located between the front panel 300 and the centrifugal fan 100. The compressor 600 is installed in the cavity. The motor 700 is installed in the cavity and transmissionally connected with the wind wheel 20 of the centrifugal fan 100, and the motor 700 is used to drive the wind wheel 20 to rotate.

[0083] When the motor 700 drives the wind wheel 20 to rotate, a negative pressure can be generated in the installation cavity 11a of the centrifugal fan 100, under the action of the negative pressure, external air enters from the air return port 310 of the front panel 300, the airflow flows through the heat exchanger 500 for heat exchange, and then enters the installation cavity 11a from the air inlet 11b of the volute body 11, the airflow flows out of the installation cavity 11a and then flows upward to the air outlet flow channel 11d, and then is turned forward by a certain angle (such as 90 degrees) in the air outlet flow channel 11d, and under the guidance of the flow guide rib 12 and the flow guide surface 11d1, the airflow is more smoothly guided from the first side a to the second side b, and then flows from the air outlet 11c to the whole machine air outlet 320, and finally flows out of the whole machine air outlet 320, so as to improve the uniformity of the air outlet.

[0084] The above merely describes the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the technical concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

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, the mounting cavity has a central axis, and the first side and the second side are respectively defined on the two sides of the central axis of the mounting cavity, and the central axis of the air outlet is located on the first side; The guide ribs are arranged in the air outlet flow channel, one end of the guide rib away from the mounting cavity is inclined towards the second side, and the guide rib is used for guiding the airflow from the first side to the second side. The guide rib is in an arc shape.

2. The centrifugal volute of claim 1, wherein, The guide rib is arranged on the rear end surface of the air outlet flow channel.

3. The centrifugal volute of claim 1, wherein, The rear end surface of the air outlet flow channel is provided with a guide surface, and the guide surface is inclined towards the front of the volute body.

4. The centrifugal volute of claim 3, wherein, The width of the guide rib is defined as w, and w is greater than or equal to 4 mm.

5. The centrifugal volute of any one of claims 1 to 4, wherein, The angle between the deflection angle of one end of the guide rib close to the mounting cavity and the horizontal plane is defined as θ1, and 45°≤θ1≤90° is satisfied.

6. The centrifugal volute of any one of claims 1 to 4, wherein, And / or, the angle between the deflection angle of one end of the guide rib away from the mounting cavity and the horizontal plane is defined as θ2, and 0°≤θ2≤60° is satisfied. The guide rib is provided with a plurality of guide ribs, 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 4, wherein, The distance between two adjacent guide ribs is defined as d1, and the width of the air outlet is defined as d2, and 0.1d2≤d1≤0.3d2 is satisfied.

8. The centrifugal volute of claim 7, wherein, The volute body comprises:

9. The centrifugal volute of any one of claims 1 to 4, 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 comprises:

10. A centrifugal fan characterized by The centrifugal volute according to any one of claims 1 to 9; An impeller arranged in the mounting cavity of the centrifugal volute. The radius of the impeller is defined as R1, the distance between one end of the guide rib close to the impeller and the rotation center of the impeller is defined as R2, and R2-R1≥5mm is satisfied.

11. The centrifugal fan of claim 10, wherein The centrifugal fan comprises the centrifugal volute according to claim 10 or 11.

12. An air conditioner characterized by comprising: ​

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