Rotary device

Abstract

To provide a rotary device which can be easily manufactured while improving cooling performance.SOLUTION: A rotary device includes a shaft, am impeller fixed to the shaft, a motor configured to rotate the impeller, and a casing which houses the impeller and the motor. The casing has an intake port and a discharge port for a fluid. In a radial direction of the impeller, the casing and a heat sink are located adjacent to each other. The heat sink has: a first portion located adjacent to the discharge port; and a second portion disposed in the discharge port. The heat pipe is in contact with the first portion. In an axial direction of the impeller, the second portion is in contact with the casing.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to rotating equipment. [Background technology]

[0002] Some electronic computers include a housing, a heat generating element mounted within the housing, a cooling fan arranged within the housing, heat dissipation fins arranged within the housing facing the cooling fan, and a heat transfer member that thermally connects the heat dissipation fins to the heat generating element (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-187120 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technique described in Patent Document 1 leaves room for improvement in terms of facilitating the manufacture of fans (rotating devices).

[0005] The present invention has been made in view of the above, and an object of the present invention is to provide a rotating device that is easy to manufacture while improving cooling performance. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, a rotating device according to the present invention comprises a shaft, an impeller fixed to the shaft, a motor that rotates the impeller, and a casing that houses the impeller and the motor. The casing has a fluid inlet and an outlet. The casing and a heat sink are adjacent to each other in the radial direction of the impeller. The heat sink has a first portion adjacent to the outlet and a second portion disposed inside the outlet. A heat pipe is in contact with the first portion. The second portion is in contact with the casing in the axial direction of the impeller.

[0007] According to one aspect of the rotating device of the present invention, it is possible to facilitate the manufacture of the rotating device while improving the cooling performance. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a rotating device according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of a portion of the main body of the rotating device shown in FIG. [Diagram 3] FIG. 3 is an exploded perspective view of the main body shown in FIG. [Figure 4] FIG. 4 is a perspective view of an impeller included in the main body shown in FIG. [Diagram 5] FIG. 5 is a cross-sectional view of the main body shown in FIG. [Figure 6] FIG. 6 is a perspective view of a heat sink provided in the main body shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of a fan 1, which is a rotating device, will be described in detail below with reference to the drawings. Note that the dimensional relationships and ratios of elements in the drawings may differ from the reality. The dimensional relationships and ratios of elements may differ between the drawings.

[0010] [Embodiment] FIG. 1 is a perspective view showing a rotating device (fan 1) according to an embodiment. FIG. 2 is a cross-sectional view of a portion of a main body M of the fan 1 shown in FIG. 1. FIG. 3 is an exploded perspective view of the main body M shown in FIG. 2. FIG. 4 is a perspective view of an impeller 4 provided in the main body M shown in FIG. 2. FIG. 5 is a cross-sectional view of the main body M shown in FIG. 2. FIG. 6 is a perspective view of a heat sink 6 provided in the main body M shown in FIG. 2.

[0011] In the description of the fan 1 according to this embodiment, which is a rotating device shown in FIG. 1, in order to facilitate understanding of directions, the direction in which the shaft 3 described later extends is called the axial direction A, the direction perpendicular to the axial direction A is called the horizontal direction X, and the direction perpendicular to the axial direction A and the horizontal direction X is called the vertical direction Y. The direction in which the shaft 3 rotates is called the circumferential direction C, and the direction that is included in a plane perpendicular to the axial direction A, passes through the axis 3o of the shaft 3, and is perpendicular to the circumferential direction C is called the radial direction R. In the fan 1 according to this embodiment, the radial direction R is included in the vertical direction Y. Furthermore, in this embodiment, the axial direction A coincides with, for example, the up-down direction Z described later.

[0012] 1 is built into, for example, a computer and is used to cool components provided inside the computer. The fan 1 according to this embodiment has a function of cooling a heat generating element AT2, such as a central processing unit of the computer. The fan 1 according to this embodiment also includes a main body M and an accessory device AT.

[0013] The main body M includes, for example, a casing 2, a shaft 3 (see FIG. 5), an impeller 4, a motor 5 (see FIGS. 4 and 5), a heat sink 6, and a heat pipe 7. In the main body M according to this embodiment, the casing 2 incorporating the impeller 4 and the heat sink 6 are integrally formed.

[0014] 2 is configured to have an internal space 2s by, for example, a flat upper casing 21, a flat lower casing 22, and an intermediate casing 23 located between the upper casing 21 and the lower casing 22 in the axial direction A. As described later, the upper casing 21 is disposed on a first surface 21H of the second portion 6122 facing one side in the axial direction A.

[0015] The casing 2 also has an opening 2H that communicates the internal space 2s with the outside. The casing 2 according to this embodiment has, for example, two openings 2H. Of the two openings 2H, a first opening 2H1 is formed in the upper casing 21. Of the two openings 2H, a second opening 2H2 is formed by the upper casing 21, the lower casing 22, and the intermediate casing 23.

[0016] The first opening 2H1 serves as an intake port through which a fluid (air) is drawn into the internal space 2s of the casing 2 by disposing the impeller 4 in the internal space 2s of the casing 2. The second opening 2H2 serves as an exhaust port through which a fluid (air) is discharged from the internal space 2s of the casing 2 by disposing the impeller 4 in the internal space 2s of the casing 2.

[0017] The impeller 4 and the motor 5 (see FIG. 5) are disposed in the internal space 2s. That is, the casing 2 accommodates the impeller 4 and the motor 5.

[0018] 5 is a so-called rotating shaft, and is formed, for example, from a metal member into a cylindrical shape extending along the axial direction A. The shaft 3 has an axis 3o, and is provided to be rotatable about the axis 3o. In the fan 1 according to this embodiment, the shaft 3 is rotatably attached to the lower casing 22.

[0019] In addition, an impeller 4 is fixed to the shaft 3. Then, the shaft 3 is rotated in a circumferential direction C by being driven by the motor 5, and the plurality of blades 44 of the impeller 4 move along the circumferential direction C, thereby discharging a fluid (air) from the second opening 2H2 which is a discharge port.

[0020] 4 includes a top surface portion 41, a side surface portion 42, a bottom surface portion 43, a plurality of blades 44, and a connecting portion 45. The top surface portion 41 is fixed to the shaft 3, and is disposed at the uppermost position of the impeller 4 in the axial direction A.

[0021] The side surface portion 42 is connected to the top surface portion 41, and has an outer peripheral surface located around the axis 3o of the shaft 3. The bottom surface portion 43 is disposed at the lowermost side of the impeller 4 in the axial direction A, and connects the plurality of blades 44 at the lower side.

[0022] The multiple blades 44 are arranged, for example, at equal intervals around the axis 3o of the shaft 3. That is, the multiple blades 44 are arranged at intervals in the circumferential direction C with respect to the axis 3o. The connecting portion 45 connects the multiple blades 44 at an upper side. Then, the impeller 4 discharges the fluid (air) from the second opening 2H2, which is an outlet, to the heat sink 6 by the multiple blades 44 moving in the circumferential direction C.

[0023] 5 is an electric motor that converts, for example, electrical energy from a power source into a driving force that rotates the shaft 3 in the circumferential direction C. The motor 5 is disposed in the internal space 2s of the casing 2. The motor 5 is fixed to the casing 2 via a bearing (not shown) or the like that is attached to the shaft 3.

[0024] 3 is formed of a plurality of heat dissipation plates 61 made of, for example, a metal such as copper having high thermal conductivity. The plurality of heat dissipation plates 61 include a plurality of first heat dissipation plates 611 arranged at both ends in the lateral direction X, and a plurality of second heat dissipation plates 612 arranged in the center in the lateral direction X. The heat sink 6 is adjacent to the casing 2 in the radial direction R of the impeller 4.

[0025] The multiple first heat dissipation plates 611 are formed in the same shape. The first heat dissipation plates 611 are formed by bending both ends in the axial direction A of a punched flat plate. As shown in Fig. 6, the first heat dissipation plate 611 has a first heat dissipation plate main body 611m and a pair of first heat dissipation plate opposing parts 611o located at both ends of the first heat dissipation plate main body 611m in the axial direction A and opposing each other in the axial direction A. As shown in Fig. 2, the first heat dissipation plate 611 is disposed adjacent to the second opening 2H2, which is an outlet, in the vertical direction Y.

[0026] Moreover, a dimension L0 in the axial direction A of the first heat sink 611 is the same as a dimension L1 in the axial direction A of a first portion 6121 (described later) of the second heat sink 612. Furthermore, a dimension in the vertical direction Y of the first heat sink 611 is the same as the dimension in the vertical direction Y of the first portion 6121 of the second heat sink 612. Furthermore, the multiple first heat sinks 611 are arranged at equal intervals in the horizontal direction X.

[0027] The second heat sink 612 has a first portion 6121 adjacent to the second opening 2H2 which is an outlet in the vertical direction Y, and a second portion 6122 disposed inside the second opening 2H2 which is an outlet. That is, the heat sink 6 according to this embodiment has a first portion 6121 adjacent to the second opening 2H2 which is an outlet, and a second portion 6122 disposed inside the second opening 2H2 which is an outlet. In other words, in the heat sink 6 of the fan 1 according to this embodiment, a plurality of heat sinks 61 are constituted by a first heat sink 611 and a second heat sink 612, all the first heat sinks 611 are disposed outside the casing 2, the first portions 6121 of all the second heat sinks 612 are disposed outside the casing 2, and the second portions 6122 of all the second heat sinks 612 are disposed inside the casing 2.

[0028] The second heat dissipation plates 612 are formed in the same shape. Each of the second heat dissipation plates 612 is formed by bending both ends in the axial direction A of a punched flat plate.

[0029] Each of the first portions 6121 shown in FIG. 6 has a first portion main body 6121m and a pair of first portion opposing portions 6121o that are located at both ends of the first portion main body 6121m in the axial direction A and opposed to each other in the axial direction A.

[0030] Each of the second portions 6122 has a second portion main body 6122m and a pair of second portion opposing portions 6122o that are located at both ends of the second portion main body 6122m in the axial direction A and opposed to each other in the axial direction A.

[0031] A dimension L2 in the axial direction A of the second portion 6122 is smaller than a dimension L1 in the axial direction A of the first portion 6121. Also, the dimension L2 in the axial direction A of the second portion 6122 is larger than a dimension L3 in the axial direction A (see FIG. 4) of the plurality of blades 44. In addition, a first step portion ST1 (step portion ST) is formed at the boundary between a first surface 21H facing one side of the axial direction A of the second portion 6122 and a first surface 11H facing one side of the axial direction A of the first portion 6121 shown in FIG. 6, and a second step portion ST2 (step portion ST) is formed at the boundary between a second surface 22H facing the other side of the axial direction A of the second portion 6122 and a second surface 12H facing the other side of the axial direction A of the first portion 6121.

[0032] Furthermore, the multiple second heat dissipation plates 612 are arranged at equal intervals in the horizontal direction X. Furthermore, in the heat sink 6 according to this embodiment, the intervals between the multiple first heat dissipation plates 611 in the horizontal direction X are the same as the intervals between the multiple second heat dissipation plates 612 in the horizontal direction X. In other words, in the heat sink 6 according to this embodiment, the multiple heat dissipation plates 61 are arranged at equal intervals in the horizontal direction X. Then, as shown in FIG. 3, the multiple heat dissipation plates 61 are arranged such that the multiple first heat dissipation plates 611 and the first portions 6121 of the multiple second heat dissipation plates 612 are aligned in the horizontal direction X.

[0033] 2 is in contact with the heat pipe 7. In the axial direction A of the impeller 4, the second portion 6122 is in contact with the casing 2.

[0034] A first surface 21H of the second portion 6122 facing one side in the axial direction A abuts against the upper casing 21. A second surface 22H of the second portion 6122 facing the other side in the axial direction A abuts against the lower casing 22.

[0035] Each of the multiple heat sinks 61 is, for example, fixed to the underside 7HL of the heat pipe 7, and then the second part 6122 of the second heat sink 612 is inserted into the second opening 2H2 of the casing 2, and both ends of the second heat sink 612 in the vertical direction Z are attached to the upper casing 21 and the lower casing 22.

[0036] The heat pipe 7 is made of, for example, a metal such as copper having high thermal conductivity, and has a function of thermally connecting a heat generating body AT2 such as a central processing unit to the heat sink 6. The heat pipe 7 is disposed on the first surface 11H of the first portion 6121 facing one side of the axial direction A. On the other hand, as described above, the upper casing 21 of the casing 2 is disposed on the first surface 21H of the second portion 6122 facing one side of the axial direction A. As a result, the heat pipe 7 is disposed adjacent to the upper casing 21 across the first step ST1 in a top view. Moreover, the heat pipe 7 and the upper casing 21 are not opposed to each other in the radial direction R.

[0037] An upper surface 7HU of the heat pipe 7 in the vertical direction Z is exposed to the outside of the heat sink 61, while a lower surface 7HL of the heat pipe 7 in the vertical direction Z is attached to the multiple heat sinks 61. As shown in Fig. 1, the heat pipe 7 according to this embodiment is formed to extend in the horizontal direction X.

[0038] The accessory device AT includes a substrate AT1, a heating element AT2 which is a central processing unit, and a heat spreader plate AT3. The substrate AT1 is a base on which the heating element AT2 which is a central processing unit is placed, and abuts against the lower surface of the heating element AT2 in the vertical direction Z. The heat spreader plate AT3 is made of a metal such as copper having high thermal conductivity, and abuts against the upper surface of the heating element AT2 in the vertical direction Z.

[0039] As described above, the fan 1 according to the present embodiment includes the shaft 3, the impeller 4 fixed to the shaft 3, the motor 5 for rotating the impeller 4, and the casing 2 for housing the impeller 4 and the motor 5. The casing 2 has a first opening 2H1 which is a fluid inlet and a second opening 2H2 which is a fluid outlet. The casing 2 and the heat sink 6 are adjacent to each other in the radial direction R of the impeller 4. The heat sink 6 has a first portion 6121 adjacent to the outlet and a second portion 6122 disposed inside the outlet. The heat pipe 7 is in contact with the first portion 6121. In the axial direction A of the impeller 4, the second portion 6122 is in contact with the casing 2. Therefore, a part of the heat sink 6 according to the present embodiment enters the inside of the casing 2 and abuts against the casing 2. As a result, the fan 1 according to the present embodiment can improve the cooling performance.

[0040] Moreover, the first heat dissipation plates 611 according to this embodiment are formed in the same shape. Moreover, the second heat dissipation plates 612 according to this embodiment are formed in the same shape. Therefore, the heat dissipation plates 61 according to this embodiment can be easily manufactured, and therefore the manufacture of the fan 1 can be facilitated.

[0041] Moreover, the impeller 4 according to this embodiment has a plurality of blades 44 that rotate around the axis 3o. The dimension L2 in the axial direction A of the second portion 6122 is larger than the dimension L3 in the axial direction A of the plurality of blades 44. Therefore, in the fan 1 according to this embodiment, when a large force is applied from the axial direction A, the large force is received by the second portion 6122, and therefore, it is possible to prevent the large force from being applied to the blades 44 of the impeller 4.

[0042] Furthermore, in the fan 1 according to this embodiment, a dimension L2 in the axial direction A of the second portion 6122 is smaller than a dimension L1 in the axial direction A of the first portion 6121. In addition, a first step portion ST1 (step portion ST) is formed at the boundary between a first surface 21H facing one side in the axial direction A of the second portion 6122 and a first surface 11H facing one side in the axial direction A of the first portion 6121, and a second step portion ST2 (step portion ST) is formed at the boundary between a second surface 22H facing the other side in the axial direction A of the second portion 6122 and a second surface 12H facing the other side in the axial direction A of the first portion 6121.

[0043] Moreover, in fan 1 according to this embodiment, casing 2 has upper casing 21 and lower casing 22. First surface 21H abuts on upper casing 21, and second surface 22H abuts on lower casing 22. Therefore, generation of abnormal noise due to driving of fan 1 and vibration of casing 2 caused by wind generated by driving of fan 1 can be suppressed.

[0044] Furthermore, the heat pipe 7 according to this embodiment is disposed on the first surface 11H of the first portion 6121 facing one side of the axial direction A. Moreover, the upper casing 21 of the casing 2 is disposed on the first surface 21H of the second portion 6122 facing one side of the axial direction A. Therefore, the upper surface 7HU of the heat pipe 7 according to this embodiment is exposed to the outside, and the heat pipe 7 is adjacent to the casing 2 in the radial direction R. As a result, the fan 1 according to this embodiment can improve the cooling performance by the heat pipe 7 and the casing 2. Moreover, the driving of the fan 1 and the vibration of the casing 2 caused by the wind generated by the driving of the fan 1 can be prevented from being transmitted to the heat pipe 7.

[0045] In the fan 1 according to the embodiment described above, the heat sink 6 has been described as including the first heat dissipation plate 611 and the second heat dissipation plate 612. However, the heat sink 6 according to the embodiment is not limited to this. For example, in the heat sink 6 of the fan 1 according to the embodiment, all of the multiple heat dissipation plates 61 may be configured with second heat dissipation plates 612 of the same shape, and the second portions 6122 of all of the second heat dissipation plates 612 may be disposed inside the casing 2.

[0046] Although the rotating device (fan 1) according to the present invention has been described above based on an embodiment, the present invention is not limited to the embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention. Such modifications made without departing from the gist of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0047] 1 rotating equipment (fan), 2 casing, 2H1 first opening (suction port), 2H2 second opening (discharge port), 21 upper casing, 22 lower casing, 3 shaft, 3o shaft core, 4 impeller, 44 blade, 5 motor, 6 heat sink, 6121 first part, 11H first surface, 12H second surface, 6122 second part, 21H first surface, 22H second surface, ST step, ST1 first step (step), ST2 second step (step), 7 heat pipe, R radial direction, A axial direction, L1 axial dimension of first part, L2 axial dimension of second part, L3 axial dimension of blade

Claims

1. A shaft, an impeller fixed to the shaft; A motor that rotates the impeller; a casing that houses the impeller and the motor, The casing has a fluid inlet and a fluid outlet, The casing and the heat sink are adjacent to each other in a radial direction of the impeller, the heat sink has a first portion adjacent to the outlet and a second portion disposed within the outlet, A heat pipe is in contact with the first portion, In the axial direction of the impeller, the second portion is in contact with the casing. Rotating equipment.

2. The impeller has a plurality of blades that rotate around an axis, The axial dimension of the second portion is greater than the axial dimension of the plurality of blades. The rotating device according to claim 1 .

3. the axial dimension of the second portion is smaller than the axial dimension of the first portion; a step is formed at a boundary between a first surface of the second portion facing one side in the axial direction and a first surface of the first portion facing one side in the axial direction, and a step is formed at a boundary between a second surface of the second portion facing the other side in the axial direction and a second surface of the first portion facing the other side in the axial direction. The rotating device according to claim 1 or 2.

4. The casing includes an upper casing and a lower casing, The first surface abuts against the upper casing, The second surface abuts against the lower casing. The rotating device according to claim 3 .

5. The heat pipe is disposed on the first surface of the first portion, the first surface facing one side in the axial direction, The upper casing of the casing is disposed on the first surface facing one side of the axial direction of the second portion. The rotating device according to claim 4.

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