Centrifugal fan and heat dissipation cabinet

Abstract

The utility model discloses a centrifugal fan and a heat dissipation cabinet, which are characterized in that the centrifugal fan comprises an impeller, a stator and a rotor, the impeller comprises blades, a first structural member and a second structural member, and the plane where the first structural member is located is parallel to the plane where the second structural member is located. The blades are fixed between the first structural member and the second structural member, and the first structural member and the second structural member have unequal maximum outer diameters. The maximum outer diameters of the first structural part and the second structural part are not equal, so that the air outlet area of the fan is increased compared with that when the maximum outer diameters of the first structural part and the second structural part of the impeller are equal, the air outlet direction is changed, the resistance borne by the centrifugal fan is reduced, and the air outlet efficiency is improved; particularly, when the centrifugal fans are installed in parallel, air volume attenuation caused by overlarge resistance can be reduced when the installation distance of the fans is small.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation of electrical equipment, and in particular to a centrifugal fan and heat dissipation cabinet. Background Technology

[0002] Centrifugal fans are widely used in the heat dissipation of electrical equipment due to their large air volume and high air pressure, especially for high-power cabinet cooling. With the development of the industry, the power density of power cabinets is increasing, making the internal space of the cabinets very limited.

[0003] Centrifugal fan impellers are typically cylindrical, with the airflow direction perpendicular to the inlet and outlet directions. The outlet surface of the centrifugal fan is the side of the cylinder. This means that in many applications, the centrifugal fan's outlet direction is perpendicular to the side of the cabinet. Combined with the limited space within the cabinet, the distance between the outlet and the cabinet side is limited, causing the airflow to be blown directly against the cabinet wall without effective diffusion, resulting in unnecessary airflow loss and affecting heat dissipation performance. To ensure the cabinet's heat dissipation capacity, it is often necessary to choose a higher-powered fan or increase the cabinet width, but these solutions increase costs to some extent. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a centrifugal fan and heat dissipation cabinet, which aims to solve the problem that the existing centrifugal fan causes unnecessary wind power loss and thus poor heat dissipation effect due to the limitations of air outlet direction and space when it is used.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On the one hand, this utility model provides a centrifugal fan, including an impeller, a stator and a rotor. The impeller includes blades, a first structural component and a second structural component. The planes on which the first structural component and the second structural component are located are parallel to each other. The blades are fixed between the first structural component and the second structural component. The first structural component and the second structural component have different maximum outer diameters.

[0007] Furthermore, the centrifugal fan also includes an air guide ring, which is located on the side of the second structural member facing away from the first structural member, and the air guide ring is parallel to the plane on which the second structural member is located.

[0008] Furthermore, the centrifugal fan also includes an air inlet and an air outlet. The air inlet is located on the side of the air guide ring away from the second structural member, and the air outlet is located between adjacent blades of the impeller. The air outlet has an angle with the plane of the first structural member, and the air output from the air outlet has an air outlet component one that is parallel to the first structural member and an air outlet component two that is perpendicular to the plane of the first structural member.

[0009] Furthermore, the rotor has a fixing hole one, and the first structural component has a fixing hole two, and the fixing hole one and the fixing hole two are fixedly connected.

[0010] Furthermore, the first endpoint of the outer edge of the blade is located on the first maximum outer diameter of the first structural member, and the second endpoint is located on the second maximum outer diameter of the second structural member. The outer edge of the blade is a curve.

[0011] Furthermore, the projection of the outer edge of the blade onto the radial direction of the first structural member is a straight line.

[0012] Furthermore, the projection of the outer edge of the blade in any direction is not a straight line.

[0013] On the other hand, this utility model also provides a heat dissipation cabinet, which includes the centrifugal fan mentioned above. The heat dissipation cabinet also includes several heat sources. The centrifugal fan draws air from the first heat source and blows air to the second heat source.

[0014] This utility model discloses a centrifugal fan and a heat sink. The centrifugal fan includes an impeller, a stator, and a rotor. The impeller includes blades, a first structural component, and a second structural component. The planes containing the first and second structural components are parallel to each other. The blades are fixed between the first and second structural components. The first and second structural components have unequal maximum outer diameters. The unequal maximum outer diameters of the first and second structural components increase the fan's outlet area compared to when the maximum outer diameters of the first and second structural components of the impeller are equal. The airflow direction also changes, reducing the resistance experienced by the centrifugal fan and improving its airflow efficiency. Especially when centrifugal fans are installed in parallel, this utility model can reduce airflow attenuation caused by excessive resistance when the fan installation spacing is small.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A structural front view of a centrifugal fan provided by this utility model;

[0018] Figure 2 An exploded view of a centrifugal fan provided by this utility model;

[0019] Figure 3 A schematic diagram of the impeller structure of a centrifugal fan provided by this utility model;

[0020] Figure 4 A schematic diagram of another impeller structure of a centrifugal fan provided by this utility model;

[0021] Figure 5 A schematic diagram of a centrifugal fan installed in parallel, provided by this utility model;

[0022] Figure 6 A schematic diagram of another impeller structure of a centrifugal fan provided by this utility model;

[0023] Figure 7 A schematic diagram of the structure of a heat dissipation cabinet provided by this utility model;

[0024] Figure 8 This is another structural schematic diagram of a heat dissipation cabinet provided by this utility model.

[0025] Figure Labels

[0026] 100. Centrifugal fan; 101. Stator; 102. Rotor; 103. Impeller; 104. Air guide ring; 105. Air inlet; 106. Air outlet; 1021. Fixing hole one; 1031. Blade; 1032. First structural component; 1033. Second structural component; 1034. Fixing hole two; D1. First maximum outer diameter; D2. Second maximum outer diameter; 1035. End point one; 1036. End point two; 1061. Air outlet component one; 1062. Air outlet component two; 201. Enclosure; 301. Heat sink; 401. First heat source; 402. Second heat source. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] like Figures 1-2 As shown, this utility model embodiment provides a centrifugal fan 100 and a heat sink 301. The centrifugal fan 100 includes an impeller 103, a stator 101, and a rotor 102. The impeller 103 includes blades 1031, a first structural member 1032, and a second structural member 1033. The impeller 103 is fixedly connected to the rotor 102 through the first structural member 1032. The planes on which the first structural member 1032 and the second structural member 1033 are located are parallel to each other. The blades 1031 are fixed between the first structural member 1032 and the second structural member 1033. The first structural member 1032 and the second structural member 1033 have unequal maximum outer diameters.

[0034] The first and second structural components 1033 of this invention have different maximum outer diameters, which increases the air outlet area of ​​the fan compared to when the maximum outer diameters of the first and second structural components 1033 of the impeller 103 are equal. The air outlet direction is also changed, which reduces the resistance of the centrifugal fan 100 and improves the air outlet efficiency. Especially when the centrifugal fans 100 are installed in parallel, this invention can reduce the air volume attenuation caused by excessive resistance when the fan installation spacing is small.

[0035] Specifically, such as Figure 2 As shown, the centrifugal fan 100 also includes an air guide ring 104. The air guide ring 104 is located on the side of the second structural member 1033 facing away from the first structural member 1032, and is parallel to the plane where the second structural member 1033 is located. When the centrifugal fan 100 is working, the air guide ring 104 guides the airflow near the air inlet 105 to flow into the air inlet 105.

[0036] It should be noted that the planes on which the air guide ring 104 and the second structural component 1033 are located are parallel to each other, but they do not contact each other.

[0037] The rotor 102 of the centrifugal fan 100 has several fixing holes 1021, and the first structural component 1032 has several fixing holes 1034. Each fixing hole 1021 has a corresponding fixing hole 1034, and the two are fixedly connected together. The connection method includes bolt connection, so that the impeller 103 can rotate with the rotor 102.

[0038] Specifically, such as Figure 1 As shown, the centrifugal fan 100 also includes an air inlet 105 and an air outlet 106. The air inlet 105 is located on the side of the guide ring 104 away from the second structural member 1033. The air outlet 106 is located between adjacent blades 1031 of the impeller 103. The air output from the air outlet 106 has an air outlet component 1061 parallel to the first structural member 1032 and an air outlet component 2062 perpendicular to the plane of the first structural member 1032. That is, the air outlet direction of the air outlet 106 forms an angle with the plane of the first structural member 1032.

[0039] In this embodiment, the direction of the second air outlet component 1062 is opposite to that of the second structural component 1033.

[0040] Preferably, such as Figure 1 As shown, the second maximum outer diameter D2 of the second structural component 1033 of the centrifugal fan 100 is greater than the first maximum outer diameter D1 of the first structural component 1032.

[0041] In one embodiment, such as Figure 6 As shown, the second maximum outer diameter D2 of the second structural component 1033 of the centrifugal fan 100 is smaller than the second maximum outer diameter D1 of the first structural component 1032. The air outlet direction of the air outlet 106 is related to the size relationship between the first maximum outer diameter D1 of the first structural component 1032 and the second maximum outer diameter D2 of the second structural component 1033.

[0042] Specifically, in this embodiment, the direction of the second air outlet component 1062 is opposite to the plane where the first structural component 1032 is located, while the direction of the first air outlet component 1061 is still parallel to the plane where the first structural component 1032 is located.

[0043] In one embodiment, such as Figure 3 As shown, endpoint 1035 of the outer edge of blade 1031 is located on the first maximum outer diameter D1 of the first structural member 1032, and endpoint 1036 is located on the second maximum outer diameter D2 of the second structural member 1033. The outer edge of blade 1031 is a curve (not shown in the figure). The projection of the outer edge of blade 1031 in a radial direction (not shown in the figure) of the first structural member 1032 is a straight line.

[0044] It should be noted that in this embodiment, the outer edge of the blade 1031 of the impeller 103 is on a plane, so a radial direction of the first structural member 1032 can always be found, that is, a plane can always be found so that the projection of the outer edge of the blade 1031 on this plane is a straight line.

[0045] In one embodiment, such as Figure 4As shown, the projection of the outer edge of the blade 1031 of the impeller 103 in any direction is not a straight line. Specifically, the area of ​​the blade 1031 is... Figure 3 The blade 1031 in the illustrated embodiment has a larger area, and the heat dissipation effect is further improved.

[0046] It should be noted that in this embodiment, the outer edge of the blade 1031 of the impeller 103 is not on a plane, that is, the outer edge of the blade 1031 is a three-dimensional curve, so its projection in any direction is not a straight line.

[0047] In one embodiment, such as Figure 5 As shown, centrifugal fans 100 can be installed in parallel to form a fan unit, with adjacent centrifugal fans 100 separated by a frame 201. Generally, when the installation distance between centrifugal fans 100 is small and the first maximum outer diameter D1 of the first structural member 1032 is equal to the second maximum outer diameter D2 of the second structural member 1033, the air output from the outlet 106 will blow directly towards the wall of the frame 201, reducing the wind force and slowing the airflow around the centrifugal fans 100. In this embodiment, the maximum outer diameters of the first structural member 1032 and the second structural member 1033 of the centrifugal fan 100 are not equal, causing the air outlet 106 to have an angle with the wall of the frame 201. The output air has an air component 1062 perpendicular to the plane of the first structural member 1032, reducing wind force loss due to the resistance of the frame 201 and increasing heat dissipation efficiency.

[0048] like Figure 7 As shown, this utility model embodiment discloses a heat dissipation cabinet 301, including the centrifugal fan 100 mentioned above. The heat dissipation cabinet 301 also includes a first heat source 401 and a second heat source 402. The centrifugal fan 100 draws air from the first heat source 401 through the air inlet 105 to dissipate heat, and sends air to the second heat source 402 through the air outlet 106 to cool it, thereby reducing the temperature of the heat dissipation cabinet 301.

[0049] Specifically, the first maximum outer diameter D1 of the first structural component 1032 of the centrifugal fan 100 impeller 103 is smaller than the second maximum outer diameter D2 of the second structural component 1033. The centrifugal fan 100 is located above the first heat source 401 and performs exhaust cooling on the first heat source 401. The air blown from the air outlet 106 then cools the second heat source 402.

[0050] Since the air output from the air outlet 106 has an air outlet component 1062 that is perpendicular to the plane where the first structural component 1032 is located, the air loss caused by the resistance of the cabinet wall is reduced. The fact that the first maximum outer diameter D1 and the second maximum outer diameter D2 are not equal changes the air outlet direction. The air outlet component 1062 can directly cool and dissipate heat to the second heat source 402, which greatly increases the heat dissipation efficiency of the heat dissipation cabinet 301.

[0051] Preferably, the first heat source 401 is a power device including a power inductor, and the second heat source 402 is a heat-generating device including a capacitor.

[0052] In one embodiment, such as Figure 8 As shown, the centrifugal fan 100 is located above the first heat source 401, and the second heat source 402 is located below the centrifugal fan 100 and on both sides of the first heat source 401.

[0053] Specifically, the first maximum outer diameter D1 of the first structural component 1032 of the centrifugal fan 100 impeller 103 is greater than the second maximum outer diameter D2 of the second structural component 1033. The centrifugal fan 100 is located above the first heat source 401 and performs exhaust cooling on the first heat source 401. The air blown from the air outlet 106 then cools the second heat source 402.

[0054] This utility model discloses a centrifugal fan 100 and a heat sink 301. The centrifugal fan 100 includes an impeller 103, a stator 101, and a rotor 102. The impeller 103 includes blades 1031, a first structural member 1032, and a second structural member 1033. The impeller 103 is fixedly connected to the rotor 102 through the first structural member 1032. The planes on which the first structural member 1032 and the second structural member 1033 are located are parallel to each other. The blades 1031 are fixed between the first structural member 1032 and the second structural member 1033. The first structural member 1032 and the second structural member 1033 have unequal maximum outer diameters. The first and second structural components 1033 of this invention have different maximum outer diameters, which increases the air outlet area of ​​the fan compared to when the maximum outer diameters of the first and second structural components 1033 of the impeller 103 are equal. The air outlet direction is also changed, which reduces the resistance of the centrifugal fan 100 and improves the air outlet efficiency. Especially when the centrifugal fans 100 are installed in parallel, this invention can reduce the air volume attenuation caused by excessive resistance when the fan installation spacing is small.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A centrifugal fan characterized by comprising: The device includes an impeller, a stator, and a rotor. The impeller includes blades, a first structural component, and a second structural component. The planes containing the first structural component and the second structural component are parallel to each other. The blades are fixed between the first structural component and the second structural component. The first structural component and the second structural component have different maximum outer diameters.

2. A centrifugal fan according to claim 1, characterized in that The centrifugal fan also includes an air guide ring, which is located on the side of the second structural member facing away from the first structural member, and the air guide ring is parallel to the plane on which the second structural member is located.

3. A centrifugal fan as claimed in claim 2, characterised in that The centrifugal fan also includes an air inlet and an air outlet. The air inlet is located on the side of the air guide ring away from the second structural member. The air outlet is located between adjacent blades of the impeller. The air outlet has an angle with the plane of the first structural member. The air output from the air outlet has an air outlet component one that is parallel to the first structural member and an air outlet component two that is perpendicular to the plane of the first structural member.

4. A centrifugal fan as claimed in claim 1, wherein The impeller is fixedly connected to the rotor via a first structural component.

5. A centrifugal fan as claimed in claim 4, characterised in that The rotor has a first fixing hole, and the first structural component has a second fixing hole. The first fixing hole and the second fixing hole are fixedly connected.

6. A centrifugal fan according to any one of claims 1-5, characterized in that The first endpoint of the outer edge of the blade is located on the first maximum outer diameter of the first structural component, and the second endpoint is located on the second maximum outer diameter of the second structural component. The outer edge of the blade is a curve.

7. A centrifugal fan according to claim 6, wherein The projection of the outer edge of the blade onto the radial direction of the first structural member is a straight line.

8. A centrifugal fan according to claim 6, wherein The projection of the outer edge of the blade in any direction is not a straight line.

9. A heat sink cabinet characterized by The device includes the centrifugal fan as described in any one of claims 1-8, and the heat dissipation cabinet further includes a first heat source and a second heat source, wherein the centrifugal fan draws air from the first heat source and delivers air to the second heat source.

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