US20020011326A1 - Air rectification blades - Google Patents
Air rectification blades Download PDFInfo
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- US20020011326A1 US20020011326A1 US09/907,597 US90759701A US2002011326A1 US 20020011326 A1 US20020011326 A1 US 20020011326A1 US 90759701 A US90759701 A US 90759701A US 2002011326 A1 US2002011326 A1 US 2002011326A1
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- fan motor
- air
- air rectification
- axial fan
- rectification blades
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a technology to increase efficiency of cooling on a cooling device in which an axial fan motor is used.
- a heat sink is used for effectively discharging heat out of semiconductors or the like in electronic equipment such as a personal computer or the like. Also, in order to forcibly cool the heat sink, an axial fan motor is used.
- the axial fan motor is provided with a motor in its central portion, the flow rate of air at the central portion is reduced in comparison with the peripheral portion of the axial fan motor so that the heat sink as a whole can not be uniformly cooled. Additionally, since the air flow from the axial fan motor forms a swirl, it is also difficult to feed cooling air sufficiently to deep portions of cooling fins of the heat sink.
- the present invention has been made in view of the foregoing difficulties, and therefore has an object to provide air rectification blades for later controlling the flow rate of the air from an axial fan motor as desired to thereby enhance a cooling efficiency of a cooling device using the axial fan motor. Also, another object of the present invention is to reduce cost by reducing the number of dies for the axial fan motor.
- air rectification blades for controlling a flow rate of air from an axial fan motor, comprising an engagement portion that enables the air rectification blades to selectively attach to or detach from the axial fan motor. Then, the desired flow rate of air is controlled by selectively attaching or detaching the air rectification blades to or from the axial fan motor that has not been provided with any air rectification blades.
- the air rectification blades according to a second aspect of the present invention further comprise an engagement portion that enables the air rectification blades to directly attach to a heat sink. Accordingly, a rectified blow of air is brought to the heat sink by a cooling device comprising an axial fan motor not provided with any air rectification blades and air rectification blades, thereby cooling the heat sink directly.
- the heat sink is used for cooling semiconductors. Accordingly, the rectified blow of air is brought to the heat sink by a cooling device comprising an axial fan motor not provided with any air rectification blades and the air rectification blades, thereby cooling the heat sink directly and enhancing the cooling efficiency of the semiconductors.
- the engagement portion is provided with a one-touch attachable/detachable mechanism. Namely, the attachment/detachment of the air rectification blades to the axial fan motor or the attachment/detachment of the air rectification blades to the heat sink are performed without using any tool or jig, thereby enhancing the later detachability/attachability.
- the air rectification blades have a contour continuous with the axial fan motor. It is therefore possible to receive the assembly substantially in the same space for that of the prior axial fan motor provided with the air rectification blades.
- the air rectification blades according to a sixth aspect of the present invention may further comprise rectification plates taking on a uniform thickness vane shape. Then, in the case where the rectification plates are made of resin, it is possible to simplify the shape of the portion of the molds for forming the rectification plates.
- the air rectification blades according to a seventh aspect of the present invention may further comprise rectification plates taking on a wing shape. With such blade shape rectification plates, the vane strength of the rectification plates is enhanced. Also, the generation of sound or vibration when the air passes through the rectification plates is suppressed.
- FIG. 1A is a side elevational view showing an axial fan motor on which air rectification blades according to an embodiment of the present invention are to be mounted.
- FIG. 1B is a side elevational view showing the air rectification blades according to the embodiment of the present invention.
- FIG. 1C is a side elevational view showing a heat sink on which the air rectification blades are to be mounted.
- FIG. 2A is a top plan view showing the air rectification blade shown in FIG. 1B.
- FIG. 2B is a front view showing the air rectification blades.
- FIG. 2C is a bottom view showing the air rectification blades.
- FIG. 3 is a cross-sectional view showing the air rectification blades taken along the line A-A of FIG. 2A.
- FIG. 4A is a cross-sectional view showing a rectification plate having a uniform thickness vane shape taken along the line B-B of FIG. 2A.
- FIG. 4B is a cross-sectional view showing a rectification plate having a wing shape taken along the line B-B of FIG. 2A.
- FIG. 5 is a view showing the axial fan motor shown in FIG. 1A as viewed in a direction in which the fan motor is in intimate contact with the air rectification blades.
- FIG. 6 is a side elevational view showing the air rectification blades according to the embodiment of the present invention mounted on the axial fan motor and the heat sink.
- FIG. 1B, FIG. 1A and FIG. 1C are side sectional views showing air rectification blades 1 in accordance with the embodiment of the present invention, an axial fan motor 2 used with air rectification blades 1 (the axial fan motor is originally not provided with any air rectification blades) and a heat sink 3 to which air rectification blades 1 are directly mounted (for cooling semiconductors), respectively.
- FIG. 2A, FIG. 2B and FIG. 2C are a top plan view, a front view and a bottom view of the air rectification blades 1 , respectively.
- FIG. 3 is a cross-sectional view of the air rectification blades 1 taken along the line A-A of FIG. 2A.
- FIG. 5 shows a state of the axial fan motor 2 as viewed in a direction in which the latter is in intimate contact with the air rectification blades 1 .
- the air rectification blades 1 in accordance with the embodiment of the present invention are made of elastically deformable material such as synthetic resin or the like.
- An opening 1 b is formed in a base portion 1 a that is to be brought into contact with the axial fan motor 2 .
- a plurality of rectification plates 1 c are provided radially in the opening 1 b .
- An engagement portion that enables the air rectification blades 1 to selectively detach from or attach to the axial fan motor 2 is formed in the base portion 1 a.
- the engagement portion is provided with pins 1 d engaged with mounting holes 2 a (see FIG. 5) of the axial fan motor 2 for the mutual positioning function and hooks 1 e engaged with a flange 2 b (see FIG. 5) of the axial fan motor 2 for fixing air rectification blades 1 to the axial fan motor 2 .
- grooves 2 c for engagement with the hooks 1 e may be provided in the flange 2 b in the axial fan motor 2 .
- screw holes If for fixing the air rectification blades 1 and the axial fan motor 2 to the heat sink 3 are provided at positions in alignment with the mounting holes 2 a of the axial fan motor 2 , if necessary.
- an engagement portion that may be engaged directly with the heat sink 3 is provided in the base portion 1 a .
- the engagement portion includes legs 1 g , claws 1 h formed at inner tip end portions of the legs 1 g and ribs 1 j formed on inner surfaces of the legs 1 g .
- the legs 1 g have a length such that the tip end portions of cooling fins 3 a are located in the vicinity of a lower surface of the base portion 1 a without contacting the latter when the air rectification blades 1 are mounted on the heat sink 3 (see FIG. 6).
- the claws 1 h are engaged with grooves 3 c provided in a base 3 b of the heat sink 3 .
- FIGS. 4A and 4B Cross-sectional shapes of the rectification plate 1 c of the air rectification blades 1 taken along the line B-B of FIG. 2A are exemplified in FIGS. 4A and 4B.
- the rectification plate 1 c shown in FIG. 4A has a uniform thickness vane shape in cross section. With such a shape, in the case where the air rectification blades 1 are molded of resin by using molds, it is possible to simplify the shape of the portions of the dies for molding the rectification plates, thereby reducing the cost for the dies.
- the rectification plate 1 c shown in FIG. 4B has a wing shape in cross section. With such a shape, it is possible to enhance the vane strength of the rectification plate 1 c . Also, it is possible to suppress the generation of sound or vibration when the blow of air of the axial fan motor 2 passes through the rectification plate 1 c.
- FIG. 6 is a side elevational view showing air rectification blades 1 mounted on the axial fan motor 2 and the heat sink 3 .
- the air rectification blades 1 according to the embodiment of the present invention have a contour continuous with the axial fan motor 2 . Accordingly, it is possible to receive the axial fan motor substantially in the same space for the prior axial fan motor with air rectification blades.
- the air rectification blades 1 are provided with the pins 1 d engaged with the mounting hole 2 a (see FIG. 5) of the axial fan motor 2 and the hooks 1 e engaged with the flange 2 b (see FIG. 5) of the axial fan motor 2 for fixing the air rectification blades 1 to the axial fan motor 2 .
- the hooks 1 e are deflected so that the attachment/detachment of the air rectification blades 1 to the axial fan motor 2 may be performed in a so-called one-touch manner without using any tool or jig.
- the air rectification blades 1 are attached/detached in the one-touch manner to thereby obtain the axial fan motor provided with air rectification blades having optimum characteristics. Accordingly, the air rectification blades 1 in accordance with the embodiment of the present invention are selectively attached to or detached from the axial fan motor 2 not provided with any air rectification blades whereby it is possible to control the desired flow rate of air using the axial fan motor 2 that has a high generality.
- the general fan motor not provided with any air rectification blades is used as the axial fan motor 2 , it is unnecessary to prepare a number of kinds of molds for molding the housing of the axial fan motor in response to the characteristics of the air rectification blades, making it possible to reduce the cost for the dies.
- the air rectification blades 1 as the engagement portion that enables it to directly attach to the heat sink 3 , are provided with the legs 1 g , the claws 1 h formed at the inner tip end portions of the legs 1 g and the ribs 1 j formed on the inner surfaces of the legs 1 g . Then, the claws 1 h are engaged with the grooves 3 c provided in the base 3 b of the heat sink 3 whereby it is possible to mount the air rectification blades 1 onto the heat sink 3 in the so-called one-touch manner.
- the flow rate of air from the axial fan motor 2 is small at the central portion in comparison with the peripheral portion.
- the flow rate of air is made uniform.
- the flow of air from the axial fan motor 2 forms the swirl flow but this becomes a non-swirl flow by the air rectification blades 1 . Accordingly, it is possible to feed a sufficient amount of cooling air uniformly over the entire portion of the heat sink 3 to the deepest portion of the cooling fins 3 a to perform an effective cooling.
- air rectification blades 1 have the outer contour continuous with the axial fan motor 2 , under the condition that air rectification blades 1 are mounted on the axial fan motor 2 and the heat sink 3 as shown in FIG. 6, it is possible to receive the assembly substantially in the same space as that for the prior axial fan motor provided with air rectification blades.
- the rectification plates 1 c of the air rectification blades 1 take on the uniform thickness vane shape, it is possible to simplify the shape of the portion of the resin molding molds for forming the rectification plates and to reduce the cost for the dies. Also, where rectification plates 1 c of the air rectification blades 1 take on the wing shape, it is possible to enhance the vane strength of the rectification plates 1 c and to enhance the strength of the air rectification blades 1 .
- the rectification plates 1 c into the wing shape, it is possible to reduce the generation of sound or vibration when the air passes through the rectification plates 1 c and to avoid the degradation of the acoustic characteristics caused by using the air rectification blades 1 .
- the engagement portion, for the heat sink 3 including the legs 1 g , the claws 1 h formed at the inner tip end portions of the legs 1 g and the ribs 1 j formed in the inner surfaces of the legs 1 g is not essential in the air rectification blades 1 according to the present invention. If the air rectification blades 1 from which the engagement portion is removed (not shown in the figure) are used and mounted on the axial fan motor 2 , it is possible to provide a cooling device having a high generality with no limitations to the objects to be cooled. Also, the contour of the air rectification blades 1 is not limited to the one continuous with the axial fan motor 2 .
- the air rectification blades with the structure according to the present invention as described above exerts the following effects.
- the air rectification blades according to the fourth aspect of the present invention it is possible to attach or detach the air rectification blades to or from the axial fan motor without using any tool or jig, or to attach or detach the air rectification blades to or from the heat sink to later enhance the detachability, attachability or the assembling property, thereby readily enhancing the cooling efficiency of the cooling device using the axial fan motor.
- the air rectification blades according to the fifth aspect of the present invention it is possible to receive the assembly substantially in the same space as that for the prior axial fan motor provided with air rectification blades, to facilitate the addition of the air rectification blades and to later enhance the cooling efficiency of the cooling device using the axial fan motor.
- the air rectification blades according to the sixth aspect of the present invention it is possible to reduce the cost of dies for the rectification plates. Furthermore, with the air rectification blades according to the seventh aspect of the present invention, it is possible to enhance the vane strength of the rectification plates and to enhance the strength of the air rectification blades. Also, the generation of sound or vibration is suppressed when the air passes through the rectification plates, whereby it is possible to avoid the degradation of the acoustic characteristics caused by using the rectification plates.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a technology to increase efficiency of cooling on a cooling device in which an axial fan motor is used.
-
- In general, a heat sink is used for effectively discharging heat out of semiconductors or the like in electronic equipment such as a personal computer or the like. Also, in order to forcibly cool the heat sink, an axial fan motor is used.
- However, since the axial fan motor is provided with a motor in its central portion, the flow rate of air at the central portion is reduced in comparison with the peripheral portion of the axial fan motor so that the heat sink as a whole can not be uniformly cooled. Additionally, since the air flow from the axial fan motor forms a swirl, it is also difficult to feed cooling air sufficiently to deep portions of cooling fins of the heat sink.
- Accordingly, where it is known in advance that the cooling capacity of the axial fan motor would be insufficient, the air flow from the axial fan motor is controlled so that the air flow becomes uniform. In addition, in order to provide the air without a swirl flow, an axial fan motor provided integrally with air rectification blades is used.
- However, where the situation occurs in which a axial fan motor without air rectification blades is replaced by an axial fan motor provided with air rectification blades due to a later requirement to avoid the insufficiency of the cooling capacity, the replacement cost for the axial fan motors becomes high. Also, even if the axial fan motor provided in advance with the air rectification blades is used, where it is necessary to change the shape of the blade of the air rectification blades later, it is necessary to replace the axial fan motor as a whole, resulting in the same problem.
- Also, it is necessary to manufacture a housing specialized for a shape of each blade needed for the axial fan motor provided with air rectification blades. Where such a housing is molded of resin, there is a problem that many kinds of molds are needed.
- The present invention has been made in view of the foregoing difficulties, and therefore has an object to provide air rectification blades for later controlling the flow rate of the air from an axial fan motor as desired to thereby enhance a cooling efficiency of a cooling device using the axial fan motor. Also, another object of the present invention is to reduce cost by reducing the number of dies for the axial fan motor.
- In order to attain these and other objects, according to a first aspect of the present invention, there are provided air rectification blades for controlling a flow rate of air from an axial fan motor, comprising an engagement portion that enables the air rectification blades to selectively attach to or detach from the axial fan motor. Then, the desired flow rate of air is controlled by selectively attaching or detaching the air rectification blades to or from the axial fan motor that has not been provided with any air rectification blades.
- The air rectification blades according to a second aspect of the present invention further comprise an engagement portion that enables the air rectification blades to directly attach to a heat sink. Accordingly, a rectified blow of air is brought to the heat sink by a cooling device comprising an axial fan motor not provided with any air rectification blades and air rectification blades, thereby cooling the heat sink directly.
- In the air rectification blades according to a third aspect of the present invention, the heat sink is used for cooling semiconductors. Accordingly, the rectified blow of air is brought to the heat sink by a cooling device comprising an axial fan motor not provided with any air rectification blades and the air rectification blades, thereby cooling the heat sink directly and enhancing the cooling efficiency of the semiconductors.
- In the air rectification blades according to a fourth aspect of the present invention, the engagement portion is provided with a one-touch attachable/detachable mechanism. Namely, the attachment/detachment of the air rectification blades to the axial fan motor or the attachment/detachment of the air rectification blades to the heat sink are performed without using any tool or jig, thereby enhancing the later detachability/attachability.
- In the air rectification blades according to a fifth aspect of the present invention, the air rectification blades have a contour continuous with the axial fan motor. It is therefore possible to receive the assembly substantially in the same space for that of the prior axial fan motor provided with the air rectification blades.
- The air rectification blades according to a sixth aspect of the present invention may further comprise rectification plates taking on a uniform thickness vane shape. Then, in the case where the rectification plates are made of resin, it is possible to simplify the shape of the portion of the molds for forming the rectification plates.
- The air rectification blades according to a seventh aspect of the present invention may further comprise rectification plates taking on a wing shape. With such blade shape rectification plates, the vane strength of the rectification plates is enhanced. Also, the generation of sound or vibration when the air passes through the rectification plates is suppressed.
- In the accompanying drawings:
- FIG. 1A is a side elevational view showing an axial fan motor on which air rectification blades according to an embodiment of the present invention are to be mounted.
- FIG. 1B is a side elevational view showing the air rectification blades according to the embodiment of the present invention.
- FIG. 1C is a side elevational view showing a heat sink on which the air rectification blades are to be mounted.
- FIG. 2A is a top plan view showing the air rectification blade shown in FIG. 1B.
- FIG. 2B is a front view showing the air rectification blades.
- FIG. 2C is a bottom view showing the air rectification blades.
- FIG. 3 is a cross-sectional view showing the air rectification blades taken along the line A-A of FIG. 2A.
- FIG. 4A is a cross-sectional view showing a rectification plate having a uniform thickness vane shape taken along the line B-B of FIG. 2A.
- FIG. 4B is a cross-sectional view showing a rectification plate having a wing shape taken along the line B-B of FIG. 2A.
- FIG. 5 is a view showing the axial fan motor shown in FIG. 1A as viewed in a direction in which the fan motor is in intimate contact with the air rectification blades.
- FIG. 6 is a side elevational view showing the air rectification blades according to the embodiment of the present invention mounted on the axial fan motor and the heat sink.
- An embodiment of the present invention will now be described with reference to the accompanying drawings.
- FIG. 1B, FIG. 1A and FIG. 1C are side sectional views showing
air rectification blades 1 in accordance with the embodiment of the present invention, anaxial fan motor 2 used with air rectification blades 1 (the axial fan motor is originally not provided with any air rectification blades) and aheat sink 3 to whichair rectification blades 1 are directly mounted (for cooling semiconductors), respectively. - FIG. 2A, FIG. 2B and FIG. 2C are a top plan view, a front view and a bottom view of the
air rectification blades 1, respectively. FIG. 3 is a cross-sectional view of theair rectification blades 1 taken along the line A-A of FIG. 2A. Also, FIG. 5 shows a state of theaxial fan motor 2 as viewed in a direction in which the latter is in intimate contact with theair rectification blades 1. - The
air rectification blades 1 in accordance with the embodiment of the present invention are made of elastically deformable material such as synthetic resin or the like. Anopening 1 b is formed in abase portion 1 a that is to be brought into contact with theaxial fan motor 2. A plurality of rectification plates 1 c are provided radially in theopening 1 b. An engagement portion that enables theair rectification blades 1 to selectively detach from or attach to theaxial fan motor 2 is formed in thebase portion 1 a. - The engagement portion is provided with
pins 1 d engaged with mountingholes 2 a (see FIG. 5) of theaxial fan motor 2 for the mutual positioning function and hooks 1 e engaged with aflange 2 b (see FIG. 5) of theaxial fan motor 2 for fixingair rectification blades 1 to theaxial fan motor 2. Incidentally,grooves 2 c for engagement with thehooks 1 e may be provided in theflange 2 b in theaxial fan motor 2. Also, screw holes If for fixing theair rectification blades 1 and theaxial fan motor 2 to theheat sink 3 are provided at positions in alignment with the mountingholes 2 a of theaxial fan motor 2, if necessary. - Incidentally, although two
pins 1 d and twohooks 1 e are used in this embodiment, it is possible to increase or decrease the numbers thereof within the range where theair rectification blades 1 may be positively mounted on thefan motor 2. - Also, an engagement portion that may be engaged directly with the
heat sink 3 is provided in thebase portion 1 a. The engagement portion includeslegs 1 g,claws 1 h formed at inner tip end portions of thelegs 1 g andribs 1 j formed on inner surfaces of thelegs 1 g. Thelegs 1 g have a length such that the tip end portions ofcooling fins 3 a are located in the vicinity of a lower surface of thebase portion 1 a without contacting the latter when theair rectification blades 1 are mounted on the heat sink 3 (see FIG. 6). Also, theclaws 1 h are engaged withgrooves 3 c provided in abase 3 b of theheat sink 3. Then,projections 3 d of thebase 3 b are engaged with the gaps between theclaws 1 h and theribs 1 j whereby the fixture of theair rectification blades 1 to theheat sink 3 may be ensured both in the depression direction and the draw-out direction. - Incidentally, although four
legs 1 g are used in this embodiment, it is possible to increase or decrease the number thereof within a range such that the mounting of theair rectification blades 1 onto theheat sink 3 may be ensured. - Cross-sectional shapes of the rectification plate1 c of the
air rectification blades 1 taken along the line B-B of FIG. 2A are exemplified in FIGS. 4A and 4B. The rectification plate 1 c shown in FIG. 4A has a uniform thickness vane shape in cross section. With such a shape, in the case where theair rectification blades 1 are molded of resin by using molds, it is possible to simplify the shape of the portions of the dies for molding the rectification plates, thereby reducing the cost for the dies. - Also, the rectification plate1 c shown in FIG. 4B has a wing shape in cross section. With such a shape, it is possible to enhance the vane strength of the rectification plate 1 c. Also, it is possible to suppress the generation of sound or vibration when the blow of air of the
axial fan motor 2 passes through the rectification plate 1 c. - FIG. 6 is a side elevational view showing
air rectification blades 1 mounted on theaxial fan motor 2 and theheat sink 3. As shown in the figure, theair rectification blades 1 according to the embodiment of the present invention have a contour continuous with theaxial fan motor 2. Accordingly, it is possible to receive the axial fan motor substantially in the same space for the prior axial fan motor with air rectification blades. - The advantage obtained by the air rectification blades in accordance with the foregoing embodiment with such a structure is as follows. First of all, as the engagement portion that enables the
air rectification blades 1 to selectively detach from or attach to theaxial fan motor 2, theair rectification blades 1 are provided with thepins 1 d engaged with the mountinghole 2 a (see FIG. 5) of theaxial fan motor 2 and thehooks 1 e engaged with theflange 2 b (see FIG. 5) of theaxial fan motor 2 for fixing theair rectification blades 1 to theaxial fan motor 2. Since theair rectification blades 1 are made of elastically deformable material, thehooks 1 e are deflected so that the attachment/detachment of theair rectification blades 1 to theaxial fan motor 2 may be performed in a so-called one-touch manner without using any tool or jig. - Accordingly, in situations where it is necessary to later mount the
air rectification blades 1 to theaxial fan motor 2 not provided with any air rectification blades or there is a desire to change the characteristics of theair rectification blades 1, theair rectification blades 1 are attached/detached in the one-touch manner to thereby obtain the axial fan motor provided with air rectification blades having optimum characteristics. Accordingly, theair rectification blades 1 in accordance with the embodiment of the present invention are selectively attached to or detached from theaxial fan motor 2 not provided with any air rectification blades whereby it is possible to control the desired flow rate of air using theaxial fan motor 2 that has a high generality. - Accordingly, with
air rectification blades 1 according to the embodiment of the present invention, it is possible to enhance the cooling efficiency of the cooling device using theaxial fan motor 2. - Also, since the general fan motor not provided with any air rectification blades is used as the
axial fan motor 2, it is unnecessary to prepare a number of kinds of molds for molding the housing of the axial fan motor in response to the characteristics of the air rectification blades, making it possible to reduce the cost for the dies. - Also, the
air rectification blades 1, as the engagement portion that enables it to directly attach to theheat sink 3, are provided with thelegs 1 g, theclaws 1 h formed at the inner tip end portions of thelegs 1 g and theribs 1 j formed on the inner surfaces of thelegs 1 g. Then, theclaws 1 h are engaged with thegrooves 3 c provided in thebase 3 b of theheat sink 3 whereby it is possible to mount theair rectification blades 1 onto theheat sink 3 in the so-called one-touch manner. - As shown in FIG. 5, since the
axial fan motor 2 is provided with amotor 2 d at its central portion, the flow rate of air from theaxial fan motor 2 is small at the central portion in comparison with the peripheral portion. However, by mounting theair rectification blades 1 onto theaxial fan motor 2, the flow rate of air is made uniform. The flow of air from theaxial fan motor 2 forms the swirl flow but this becomes a non-swirl flow by theair rectification blades 1. Accordingly, it is possible to feed a sufficient amount of cooling air uniformly over the entire portion of theheat sink 3 to the deepest portion of thecooling fins 3 a to perform an effective cooling. - Incidentally, since the
heat sink 3 is used for cooling semiconductors, it is possible to later enhance the cooling efficiency by usingair rectification blades 1 in accordance with the embodiment of the present invention. - Furthermore, since
air rectification blades 1 have the outer contour continuous with theaxial fan motor 2, under the condition thatair rectification blades 1 are mounted on theaxial fan motor 2 and theheat sink 3 as shown in FIG. 6, it is possible to receive the assembly substantially in the same space as that for the prior axial fan motor provided with air rectification blades. - Incidentally, where the rectification plates1 c of the
air rectification blades 1 take on the uniform thickness vane shape, it is possible to simplify the shape of the portion of the resin molding molds for forming the rectification plates and to reduce the cost for the dies. Also, where rectification plates 1 c of theair rectification blades 1 take on the wing shape, it is possible to enhance the vane strength of the rectification plates 1 c and to enhance the strength of theair rectification blades 1. Also, by making the rectification plates 1 c into the wing shape, it is possible to reduce the generation of sound or vibration when the air passes through the rectification plates 1 c and to avoid the degradation of the acoustic characteristics caused by using theair rectification blades 1. - Incidentally, the engagement portion, for the
heat sink 3, including thelegs 1 g, theclaws 1 h formed at the inner tip end portions of thelegs 1 g and theribs 1 j formed in the inner surfaces of thelegs 1 g is not essential in theair rectification blades 1 according to the present invention. If theair rectification blades 1 from which the engagement portion is removed (not shown in the figure) are used and mounted on theaxial fan motor 2, it is possible to provide a cooling device having a high generality with no limitations to the objects to be cooled. Also, the contour of theair rectification blades 1 is not limited to the one continuous with theaxial fan motor 2. - The air rectification blades with the structure according to the present invention as described above exerts the following effects. First of all, with the air rectification blades according to the first aspect of the present invention, it is possible to later control the desired flow rate of air from the axial fan motor and to enhance the cooling efficiency of the cooling device using the axial fan motor. Also, it is possible to reduce the cost by reducing the type of dies for the axial fan motor.
- Also, with the air rectification blades according to the second aspect of the present invention, it is possible to later enhance the cooling efficiency of the heat sink. Also, with the air rectification blades according to the third aspect of the present invention, it is possible to later enhance the cooling efficiency of the semiconductors.
- Furthermore, with the air rectification blades according to the fourth aspect of the present invention, it is possible to attach or detach the air rectification blades to or from the axial fan motor without using any tool or jig, or to attach or detach the air rectification blades to or from the heat sink to later enhance the detachability, attachability or the assembling property, thereby readily enhancing the cooling efficiency of the cooling device using the axial fan motor.
- Also, with the air rectification blades according to the fifth aspect of the present invention, it is possible to receive the assembly substantially in the same space as that for the prior axial fan motor provided with air rectification blades, to facilitate the addition of the air rectification blades and to later enhance the cooling efficiency of the cooling device using the axial fan motor.
- Also, with the air rectification blades according to the sixth aspect of the present invention, it is possible to reduce the cost of dies for the rectification plates. Furthermore, with the air rectification blades according to the seventh aspect of the present invention, it is possible to enhance the vane strength of the rectification plates and to enhance the strength of the air rectification blades. Also, the generation of sound or vibration is suppressed when the air passes through the rectification plates, whereby it is possible to avoid the degradation of the acoustic characteristics caused by using the rectification plates.
Claims (7)
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JP2000-223696 | 2000-07-25 | ||
JP2000223696A JP4697501B2 (en) | 2000-07-25 | 2000-07-25 | Rectifier blade |
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US20020011326A1 true US20020011326A1 (en) | 2002-01-31 |
US6427763B2 US6427763B2 (en) | 2002-08-06 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20150020734A1 (en) * | 2013-07-17 | 2015-01-22 | Applied Materials, Inc. | Structure for improved gas activation for cross-flow type thermal cvd chamber |
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CN107243725A (en) * | 2017-05-31 | 2017-10-13 | 上海理工大学 | Steam turbine pre-assembled movable vane plectrum equipment |
Also Published As
Publication number | Publication date |
---|---|
JP4697501B2 (en) | 2011-06-08 |
JP2002039099A (en) | 2002-02-06 |
US6427763B2 (en) | 2002-08-06 |
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