Bearing frame of fan, fan assembly with bearing frame and heat transfer assembly with fan assembly

Abstract

The invention relates to a bearing frame of a fan, a fan assembly with the bearing frame and a heat transfer assembly with the fan assembly. The load-bearing frame (1) has at least three legs (3), at least one leg (3) having a J-shaped cross-section, and at least one wall (6) being higher than the other walls (7).

Description

Technical Field

[0001] This invention relates to a support frame for a fan used in a heat transfer device. The invention also relates to a fan assembly having such a support frame and a fan. Furthermore, the invention relates to a heat transfer assembly having such a fan assembly. Background Technology

[0002] During operation of a heat exchanger through which air flows, a fan ensures that air flows across the heat exchanger. For this purpose, the fan is mounted on the heat exchanger. A support structure is used to hold the fan and mount it on the heat exchanger. This support structure can be made of plastic or sheet metal.

[0003] The increasingly demanding performance requirements for heat transfer devices necessitate correspondingly higher power outputs from the associated fans. This typically results in an increase in fan weight. Summary of the Invention

[0004] The objective of this invention is to provide improved or at least alternative embodiments for carriers of the aforementioned types, for fan assemblies with such carriers and fans, and for heat transfer assemblies with heat transfer devices and such fan assemblies.

[0005] According to the invention, this task is solved by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claim.

[0006] Therefore, this invention is based on the fundamental concept of constructing a frame-like support for a fan carrying a heat transfer device. The support has J-shaped legs with walls at different heights relative to the fan's rotation direction. Implementing the support in a frame form results in improved mechanical stability while reducing weight. This allows for the accommodation of higher-powered fans, while simultaneously, for example, the support has a smaller weight compared to structures made of tubing. This leads to higher efficiency, especially in mobile applications. Furthermore, the varying wall heights prevent vibration and swaying of the support, as well as avoid or at least reduce turbulence and improve aerodynamic characteristics. The result is higher efficiency while simultaneously reducing noise generation.

[0007] Accordingly, in the concept of the present invention, the frame, hereinafter also referred to as the support frame, has an axially open receiving portion for accommodating the fan. Furthermore, the support frame has at least three circumferentially spaced legs for supporting the receiving portion. Each leg extends between the receiving portion and its corresponding foot, wherein the foot is used to connect the support frame to its corresponding heat transfer unit. At least one leg, preferably each leg, has a J-shaped cross-section with a base and two walls extending from the base. Thus, the leg has a first wall and a second wall extending from the base. The first wall follows the second wall in the direction of rotation about the axial direction. The first wall has a first axial height from the base, and the second wall has a second axial height. Here, the second axial height corresponds to between 20% and 80% of the first axial height.

[0008] The direction described here refers to the axial direction, which preferably corresponds to or extends parallel to the fan's axis of rotation. Therefore, the direction of rotation is about the axial direction. Particularly preferred and suitable is that the direction of rotation corresponds to the direction of fan rotation during operation.

[0009] In principle, the load-bearing frame can have any number of legs, with at least three.

[0010] The following variation is advantageous: in this variation, the supporting frame has a total of four such legs. Here, the legs are preferably arranged at the corners of an imaginary quadrilateral.

[0011] The first axial height will be referred to as the first height, and the second axial height will be referred to as the second height.

[0012] If the second height is between 30% and 70% of the first axial height, then it is advantageous to reduce noise generation and improve aerodynamic characteristics.

[0013] Each wall can have any height, as long as the second height is between 20% and 80% of the first height, especially between 30% and 70%.

[0014] In a favorable variation, the first height is between 10 mm and 40 mm. Preferably, the first height is between 15 mm and 35 mm.

[0015] In principle, the first and second walls can extend parallel to each other.

[0016] In a preferred embodiment, the first and second walls extend relative to each other at an angle between 15° and 65°. Preferably, the angle is between 20° and 60°. This inclined extension of the walls results in particularly advantageous aerodynamic characteristics and reduced turbulence for the load-bearing frame, and consequently, a particularly effective reduction in swaying and vibration of the load-bearing frame. Thus, efficiency is improved and noise generation is reduced in this manner.

[0017] Advantageously, at least one leg has a clamping portion in the J-shaped cross-section for guiding a cable, which can be used to power the fan. The clamping portion is preferably a rubber hose clamp. Therefore, the cable can be positioned outside the direct flow of air and within the cross-section. This results in a more compact construction and simplified installation. The rubber construction also prevents wobbling and vibration due to the clamping portion, thereby preventing or at least reducing the generation of corresponding noise.

[0018] The load-bearing frame can be manufactured in any manner.

[0019] For example, the load-bearing frame can be constructed as a deep-drawn component, such as a stamped steel sheet.

[0020] In a preferred variation, the load-bearing frame is a casting. Specifically, the load-bearing frame is a casting made of a light metal or a light metal alloy. For example, the load-bearing frame can be an aluminum casting or a magnesium casting. This, in addition to simplified manufacturing, results in a further reduction in the weight of the load-bearing frame.

[0021] Similarly, the load-bearing frame can be made of a hybrid plastic having an injection-molded component with embedded steel and high-strength long-fiber reinforced plastic.

[0022] It should be understood that, in addition to the support frame, the assembly having the support frame and the associated fan (hereinafter also referred to as the fan assembly) also falls within the scope of this invention. Here, the fan is housed in the receiving portion. Furthermore, the fan preferably rotates in the rotational direction during operation.

[0023] The support frame allows for the accommodation of fans with greater weight and / or higher power.

[0024] For example, a fan can have a weight of at least 4 kg, and especially at least 10 kg.

[0025] For example, a fan can have a power of at least 5kW, especially between 5kW and 15kW.

[0026] An advantageous embodiment includes a cover plate disposed on the housing, which is located on the side of the housing opposite to the support legs and thus opposite to the heat transfer unit, and covers and mechanically protects the fan drive, especially the electric motor. This results in a longer service life for the fan assembly.

[0027] The cover plate can be attached to the receiving part in a removable manner, for example, by means of screws.

[0028] It should be understood that, in addition to the fan assembly, components having both a fan assembly and a heat transfer device (hereinafter also referred to as heat transfer components) are also within the scope of this invention.

[0029] The airflow path is guided through the heat transfer unit, where a fan transports air along the flow path during operation. In the heat transfer assembly, the support frame and, consequently, the fan assembly, are connected to the heat transfer unit via feet on the support frame. This can be achieved, for example, using screws.

[0030] Heat transfer components can, in principle, be used in any application. Their use in mobile applications is particularly noteworthy.

[0031] In particular, heat transfer components can be used in electrically driven vehicles, such as electric trucks.

[0032] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings, and the accompanying drawings.

[0033] It should be understood that the features described above and will be set forth below can be used not only in the combinations described separately, but also in other combinations or individually, without departing from the scope of the invention. Attached Figure Description

[0034] Preferred embodiments of the invention are shown in the accompanying drawings and described in detail below, wherein the same reference numerals denote the same or similar or functionally identical parts. The drawings schematically illustrate, respectively:

[0035] Figure 1 A top view of the supporting frame is shown.

[0036] Figure 2 An isometric view of the supporting frame is shown.

[0037] Figure 3 It shows crossing in Figure 1 A cross-sectional view of the load-bearing frame in plane III-III.

[0038] Figure 4 An isometric view of the fan assembly with its support frame is shown.

[0039] Figure 5 An isometric view of the heat transfer assembly with a fan assembly is shown. Detailed Implementation

[0040] exist Figures 1 to 5 The exemplary load-bearing frame 1 shown in the figure is used for in Figure 4and Figure 5 The fan assembly 100 is illustrated in the example to carry the fan 101. The fan assembly 100 can be used in... Figure 5 The heat transfer assembly 200 with heat transferr 201 is shown as an example.

[0041] For example, especially from Figure 1 and Figure 2 As can be seen, the support frame 1 has a receiving portion 2 for accommodating the fan 101, which is open in the axial direction A. In the illustrated embodiment, and preferably, the axial direction A corresponds to the rotation axis R of the fan 101 during operation (see, for example, [reference needed]). Figure 4 Therefore, the fan 101 rotates in a given direction of rotation D about the axial direction A and thus about the rotation axis R during operation. The legs 3 of the support frame 1 extend from the receiving portion 2, wherein the support frame 1 has at least three such legs 3. The legs are spaced apart from each other in the circumferential direction U. In the illustrated embodiment, the support frame 1 has four such legs 3. Here, each leg 3 extends to its corresponding foot 4, wherein each foot 4, for example, extends from... Figure 5 As can be seen, it is used, for example, by means of screws 11, to connect the support frame 1 and, consequently, the fan 101 to the associated heat transfer unit 201. At least one of the legs 3 here has a J-shaped cross-section, as particularly from... Figure 3 As can be seen, in the illustrated embodiment, each leg 3 has this J-shaped cross-section. Therefore, each leg 3 has a curved bottom or base 5 in the J-shaped cross-section and two walls 6, 7 extending from the base 5, namely the first wall 6 and the second wall 7. The first wall 6 here follows the second wall 7 in the direction of rotation D.

[0042] If only Figure 3 As shown, starting from the base 5, the first wall 6 has a first axial height H1 (hereinafter also referred to as the first height H1), and the second wall 7 has a second axial height H2 (hereinafter also referred to as the second height H2). As shown from... Figure 3 As can be seen, the second height H2 is smaller than the first height H1. Here, the second height H2 is between 20% and 80% of the first height H1. In the illustrated embodiment, the second height H2 is between 30% and 70% of the first height H1. Furthermore, in the illustrated embodiment, the second height H2 is between 10 mm and 40 mm, particularly between 15 mm and 35 mm.

[0043] Such external influence Figure 3As can be seen, in the illustrated embodiment, the two walls 6 and 7 do not extend parallel to each other. Instead, the first wall 6 and the second wall 7 extend at an angle W to each other. The angle W can be between 15º and 65º. In the illustrated embodiment, the angle is between 20º and 60º.

[0044] In the illustrated embodiment, the support frame 1 is a casting 8, i.e., manufactured by a casting method. Preferably, the support frame 1 is a casting 8 made of a light metal (e.g., aluminum or magnesium) or a light metal alloy.

[0045] For example, especially from Figure 4 As can be seen, the cable 102 for powering the fan 101 is guided through at least one of the legs 3 of the support frame 1. For this purpose, each respective leg 3 has at least one clamping portion 9 arranged in a J-shaped cross-section. In the illustrated embodiment, each clamping portion 9 is a rubber hose clamp 10. Figure 4 and Figure 5 In this configuration, the two cables 102 of the fan 101 are guided through the respective legs 3 of the support frame 1. Thus, each of the two legs 3 has at least one clamping part 9.

[0046] If only Figure 2 As shown, the cover 105 can be mounted on the receiving portion 2, for example, by screws 11, and is arranged on the side opposite to the support leg 4. Therefore, the cover 105 covers and protects the fan 101 from the outside. Figure 4 and Figure 5 The driver 103 is shown as an example.

[0047] like Figure 5 As shown, the airflow path 202 is guided through the heat transfer device 201. Here, the fan 101 transports air along the flow path 202 and thus through the heat transfer device 201 during operation. The fan 101 may be a high-pressure fan 104 having a power of at least 5 kW, for example, between 5 kW and 15 kW. The fan 101 may have a weight of at least 4 kg, for example, at least 10 kg.

[0048] For example, the heat transfer component 200 can be used in an electrically driven truck (not shown).

[0049] List of reference numerals

[0050] 1 load-bearing frame

[0051] 2. Reception Section

[0052] 3 legs

[0053] 4 legs

[0054] 5 base

[0055] 6 First Wall

[0056] 7 Second Wall

[0057] 8 castings

[0058] 9 clamping parts

[0059] 10 hose clamps

[0060] 11 screws

[0061] 100 fan assembly

[0062] 101 Fan

[0063] 102 cable

[0064] 103 drive

[0065] 104 High-Pressure Fan

[0066] 105 cover plate

[0067] 200 heat transfer components

[0068] 201 heat transfer unit

[0069] 202 Flow Path

[0070] Axial direction

[0071] D Rotation direction

[0072] H1 First Height

[0073] H2 Second Height

[0074] R rotation axis

[0075] U-shaped direction

[0076] W angle

Claims

1. A support frame (1) for a fan (101) of a heat transfer device (201), the support frame having: - A receiving portion (2) that is open in the axial direction (A) for accommodating the fan (101). - At least three circumferentially spaced legs (3) for supporting the housing (2), the legs extending between the housing (2) and their respective legs (4) for connecting the support frame (1) and the heat transfer device (201). - in, At least one leg (3) has a J-shaped cross-section with a base (5) and a first wall (6) and a second wall (7) extending from the base (5), and wherein, • The first wall (6) follows the second wall (7) in the direction of rotation (D) about the axial direction (A). • Starting from the base (5), the first wall (6) has a first axial height (H1), and the second wall (7) has a second axial height (H2). • The second axial height (H2) is between 20% and 80% of the first axial height (H1), especially between 30% and 70%.

2. The load-bearing frame according to claim 1, characterized in that, The second axial height (H2) is between 10 mm and 40 mm, especially between 15 mm and 35 mm.

3. The load-bearing frame according to claim 1 or 2, characterized in that, The first wall (6) and the second wall (7) extend from each other at an angle (W) between 15° and 65°, especially between 20° and 60°.

4. The load-bearing frame according to any one of claims 1 to 3, characterized in that, At least one leg (3) has a clamp (9) in a J-shaped cross section for guiding the cable (102) that supplies power to the fan (101).

5. The load-bearing frame according to any one of claims 1 to 4, characterized in that, The load-bearing frame (1) is a casting (8), especially a casting made of light metal or light metal alloy.

6. The load-bearing frame according to any one of claims 1 to 5, characterized in that, The load-bearing frame (1) has a total of four such legs (3).

7. A fan assembly (100) for a heat transfer device (201), the fan assembly having a support frame (1) according to any one of claims 1 to 6 and having a fan (101). - in, The fan (101) is housed in the housing (2) and rotates in the rotation direction (D) during operation.

8. The fan assembly according to claim 7, characterized in that, The fans (101, 104) have a weight of at least 4 kg, especially at least 1 kg, and / or are configured as high-pressure fans (103) with a power of at least 5 kW, especially between 5 kW and 15 kW.

9. The fan assembly according to claim 7 or 8, characterized in that... It has a cover plate (105) disposed on the receiving part (2), the cover plate being arranged on the side of the receiving part (2) opposite to the support leg (4) and covering and mechanically protecting the driver (103) of the fan (101).

10. A heat transfer assembly (200), particularly for electrically driven vehicles, said heat transfer assembly: - It has a heat transfer device (201), through which air flows (202). - Having a fan assembly (100) according to any one of claims 7 to 9. - in, The fan assembly (100) is connected to the heat transfer unit (101) via a support (4). - wherein the fan (101) transports air along the flow path (202) through the heat transfer unit (201) during operation.

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