TWI281375B - Heat-dissipating device - Google Patents

Abstract

The present invention provides a heat-dissipating device with an axially compressed airflow passage, which includes a housing having at least one air inlet and at least one air outlet, and at least one set of rotor disposed in the housing and having a plurality of blades. The housing includes a first frame and a second frame, wherein the first frame has an extending part axially extended from its inner side toward the second frame so as to form an axially compressed airflow passage within the housing.

Description

1281375 V. INSTRUCTIONS (1) --- [Technical Field] P The present invention relates to a heat dissipating device, and more particularly to a high-pressure centrifugal fan designed using an axial compression type wind chisel. [Prior Art] A conventional blower, as shown in Figs. 1A and 1B, includes an external busy 1 0 motor 1 1 , a blade structure 1 2 and an upper cover 1 3 ' of which the outer frame 10 An opening 1 0 1 is provided as an air outlet of the air blower, and the motor U is sleeved on the base 1 2 of the outer frame 10 for rotating the blade structure 12. The upper cover 13 has a circular opening 丨 3 1 as an air inlet of the blower. The blade structure 1 2 further includes a wheel 丨 23 which is more than 1 2 1 , an annular plate 1 2 2 and a plurality of rings. However, in the conventional blower design, the air duct adopts a radial compression mode, that is, as shown in FIG. 1B, the width of the radially inner wall of the air duct in the frame is changed by the narrow width of A. The maximum width W 2 from W1 to the air outlet is such that the incoming air flow is compressed at A where the width between the radially inner walls is the boundary 1, and is guided to the air outlet 1 随着 as the direction of the arrow R. However, 'the same height in the axial direction' does not have a height change in the axial direction to provide compression of the fluid in the axial direction. For the sake of the job, the present invention, in view of the lack of the prior art, is the result of careful testing and research and the spirit of perseverance, and finally creates the "heat sink" of the case. The following is a brief description of the invention. ", [Content]

1281375 V. Description of the invention (2) Heat sink for the design of the channel. - Another object of the present invention is to provide a centrifugal fan using an axial compression type of air duct design to provide a more fluid flow in the air passage to improve fluid performance. According to one aspect of the present invention, the heat dissipating device includes a frame having at least one air inlet and at least one air outlet; and at least one moving blade portion

And having at least one blade group in the frame, wherein the frame is formed by a first frame and a first frame. The first frame has a first extension extending axially toward the second frame. And an axial compression type air passage is formed in the fan frame. The change in the axial extent of the first extension portion gradually increases from the air outlet toward the end of the air outlet. Additionally, the second frame has a second extension extending axially toward the first frame to form a double-sided axial compression tunnel. The change in the axial extent of the second extension gradually increases from the air outlet toward the end of the air outlet. In other words, the axial extension of the first extension portion and the second extension portion is closer to zero in the vicinity of the wind outlet. The axial extension of the first extension portion and the second extension portion is vertically symmetrically arranged. Preferably, the fan frame further has a radial compression air passage.

Wherein, the moving blade portion is composed of a ring portion, a bottom plate, a _th/blade group and a second blade group. The first blade set extends downward from the periphery of the crotch portion to the bottom plate surface, the second blade set is disposed on the bottom plate surface, and the first blade set and the second blade set are arranged in a cross arrangement . Of course, the number, shape or size of the blades of the first blade group and the second blade group may be the same or different. The blade's outer diameter or height is also the same

Page 8 1281375 V. Description of invention (3) or different. Furthermore, the first blade set and the second blade set may be connected to each other, partially connected or not connected at all. The first blade set and the second blade set are on the same side of the bucket portion or on the opposite side of the bucket portion. Alternatively, the first blade set and the second blade set are arranged in a top-bottom arrangement, wherein the first blade set ring is disposed at a periphery of the ring portion, and the second blade set is disposed on the bottom plate surface. Preferably, the ring portion, the bottom plate, the first blade group and the second blade group are integrally formed by injection molding. Alternatively, the ring portion is integrally injection molded with the first blade group, and the bottom plate and the second blade group are integrally injection molded and combined into a complete moving blade portion. In addition, the first frame has a base for receiving the moving blade portion, and the at least one air inlet is formed on the second frame. The second frame has a wall extending toward the inside of the frame to separate the space inside the frame to define an airflow path. One end of the wall has a flange to define the inlet of the collection air passage. Wherein the blade set of the bucket portion extends radially toward the vicinity of the inlet of the collecting air passage. Further, the height of the air flow path and the height of the flow path flowing through the moving blade portion partially or completely overlap. Wherein, the cross-sectional area of the airflow channel is substantially equal to the cross-sectional area of the air outlet. Furthermore, the air inlet of the second frame is further provided with a base portion and a plurality of flow guiding structures, and the plurality of guiding structures are disposed between the base portion and the wall surface for lifting the wind pressure of the heat dissipating device. The plurality of flow guiding structures may be affixed to the base or the wall surface and have a strip shape, a flat plate shape, a curved shape or a wing shape. Preferably, the plurality of flow guiding structures are partially connected to

Page 9 1281375

In the part i::: between the walls, the part of the wall is connected to the base, and the middle part of the two is discontinuous to form a free #. More preferably, the solid flow guiding structure is partially connected to the base and the wall of the eight-in-one mountain is one end connected to the wall surface and the other end is a free end, and the other part is connected to the base The other end is the free end. The plurality of diverting flows 7 have an angle of inclination which is similar in shape to the blade shape of the bucket portion. In addition, the first frame has a sleeve for receiving a bearing, and a bearing is disposed inside the base of the second frame of the second frame to a common shaft. Lai

The child thermal device can be a single-inlet air blower, an upside down centrifugal fan, a two-way air inlet blower, a centrifugal fan or an axial fan. Preferably, a flow guiding structure is also disposed at the at least one air outlet. In addition, the heat dissipating device further includes a driving device sleeved on one of the sleeves of the first frame and coupled to the bucket portion for driving the bucket portion. The present invention can be further understood by the following drawings and detailed description. [Embodiment Method] Referring to Figures 2A to 2C, there is shown a first preferred embodiment of the heat sink of the present invention. In this embodiment, a centrifugal fan is taken as an example. The centrifugal fan is an early-inflow type wind turbine, which mainly includes a first busy frame 21, a first frame 22, a driving device 23, and a Iron shell 24 and a moving blade

1281375 V. INSTRUCTIONS (5) Part 25. The first frame 21 has a sleeve seat 211 so that the driving device can be placed thereon, and a bearing 231 is placed in the sleeve seat 211 to support the rotating shaft 27 of the bucket portion 25. The second frame 22 has an air inlet 221 and a wall surface 222 extending downward from the inner edge of the air inlet. When the second frame 22 is combined with the first frame 21, the second frame 22 is used by the wall 2 2 2 The frame 22 is separated from the space formed by the first frame 21 to define an airflow path 26 and a space for accommodating the blade portion 25. At the same time, an air outlet 212 is formed. The bottom end has a radially extending flange for defining an inlet 261 of the side air flow passage. The moving blade portion 25 is composed of a ring portion 251, a bottom plate 252, a first blade group 253 and a first The two blade sets 254 are formed by the driving device 23, and the driving device 23 is coupled to the moving blade portion. The first blade group 2 53 and the second blade group 254 are composed of a plurality of blades. Wherein the first blade set 253 extends downward from the periphery of the ring portion 251 to the surface of the bottom plate 252, the second blade 254 is disposed on the surface of the bottom plate 2 52. The arrangement of the first set of sheets 253 and the second set of blades 254 may be staggered as shown in Fig. 2A. Of course, the first set of blades 253 and the second set of blades 254 The size, shape and arrangement include, but not limited to, two leaf group designs as shown in FIG. 2A, and the blade design of the flapping leaf portion may also have a composite blade design of at least two leaf groups, and The number, shape and inch of the blades of the various blade groups may be the same or different, and the outer diameter and height of each blade may be the same or different. In the arrangement, the blade groups may be connected to each other, connected or not connected at all. And each blade group can be listed in the moving blade portion:

Page 11 1281375 V. INSTRUCTIONS (6) — ^, ____ Same side or opposite side. For example, the first blade stage may be arranged in a top-bottom arrangement. The first blade set ring is disposed on the:=two blade set. The second blade set ring is disposed on a surface of the bottom plate. The ring portion, the circumference garden, and the one blade group and the second blade group may integrally form the H plate, and the first J and the second blade group are integrally injection molded, j type; or - the blade group It is also first-body injection molding, and finally the two-two part and the first moving part. Therefore, any change and modification of the design; synthesis - complete patent range. Without departing from the invention, the inflow of the second frame 22 is provided in a plurality of diversion structures 2 2 5 .卩224, and has a wind pressure for lifting the centrifugal fan. Between the 丨/漉面 222, after the centrifugal fan is operated ρ, after the moving blade portion, the airflow is sucked from the ventilating port 221 and passes through the collecting airflow ', the slice group 253: the second blade group 254 , the flow channel 26, is added; at the entrance, and the bow 1 leads into the gas collection

^ 4 and gas storage to avoid the rapid change of wind pressure $ L far out of the tuyere 2 ^ 2 discharge high air pressure. In this embodiment, the wall surface of the centrifugal fan at the edge of the air inlet is used to separate the air flow channel 26 and the moving blade portion 25, leaving only a small air outlet to flow through the The pressurization process of the air flow in the bucket portion becomes x to avoid a rapid change in pressure. In the axial direction of the movable portion, the height of the collecting air passage and the height of the flow passage flowing through the moving blade portion and the flow guiding structure can be 6 or completely heavy, so that the centrifugal fan can be thinned. . The crucible area of the collecting air passage 26 is substantially equal to the cross-sectional area of the air outlet 2 1 2, thereby preventing the airflow from decreasing due to the change of the obscuration.

1281375

In addition, the invention uses a two-way::: The bearing 231 is placed in the sleeve 211: the outer rim: the 232 is added to the second frame 22. The shaft 27 of the shaft portion 25 is provided to provide the inside of the wind VP4 to collectively support the occurrence of the bucket. The stability of the fan for two-speed operation and the reduction of vibration ... bucket in m: 'The centrifugal fan is an axial compression type air duct 2 9 2::: one? 2c $, which is a single-sided axial compression type air duct. The inner surface of the cover plate of the frame of the two sides has a η mouth 邛 226 extending toward the first frame, and the axial depth of the extension is from The outlet is gradually increased away from the exit = in other words, in other words, the depth of the axial extension from the end of the 2C figure to the counterclockwise >1 to the 呈现 is gradually decreasing, and the depth is It is indicated by the broken line C. Of course, according to another configuration of the present case, a double-sided axial compression air duct design can also be adopted, as shown in Fig. 3, ^ except/having a radial compression air duct design as a conventional air blower^ The base surface of the first frame has a first extension 31 extending toward the second frame, and the axial extension thereof is gradually decreasing, and the axial extension near the green wind is close to 0, and the axial direction thereof The extent of extension = is indicated by the dashed line D. The inner surface of the cover plate of the second frame has a second extension portion 3 2 extending downward in the direction of the frame, and the axial extension depth = a gradual decreasing condition, and the axial extension depth near the air outlet portion tends to ; 0 'the axial extension depth change is indicated by a broken line D, and the first extension 4 and the second extension portion are arranged in a vertically symmetrical manner. In addition, the way in which the above-described flow guiding structure is disposed at the air inlet

Page 13 1281375 V. Inventive Note (8) In addition, a similar diversion structure can be additionally disposed at the air outlet of the heat dissipating device, and the number, shape and arrangement of the diversion structure can be used according to practical applications. Different choices and changes. In addition, if the concept of the present invention is applied to an upside down centrifugal fan, a bidirectional air inlet type blower or an axial flow type fan, the flow guiding structure may be disposed at one of the air inlets or at the same time at each air inlet. . In summary, the present invention provides a heat sink that utilizes a one- or two-sided axial compression air duct design to provide a smoother flow of fluid within its air passage, thereby improving its fluid performance. Therefore, this case has been modified by people who are familiar with the art, but it is not intended to be protected by the scope of the patent application.

Page 14 1281375 Simple description of the drawing [Simple description of the drawing] Figure 1A is a three-dimensional exploded view of a conventional blower. Figure 1B is a top plan view of the combination of blowers shown in Figure 1A. Fig. 2A is a perspective exploded view of a preferred embodiment of the heat sink of the present invention. Fig. 2B is a cross-sectional view of the heat sink shown in Fig. 2A. Fig. 2C is a perspective view showing the combination of the heat sinks shown in Fig. 2A. Fig. 3 is a schematic view showing the application of the double-sided axial compression type air duct design to the heat sink of the present invention. The main components of the above figures are as follows: 10 : Outer frame 1 1 : Motor 12 : Fan blade structure 1 3 : Upper cover 101 : Opening 102 : Base 131 : Round opening 1 21 : Hub 122 : Annular plate 123 : Vane 21 : First frame 2 2 : Second frame 23 : Drive unit 2 4 : Iron shell 25 : Moving blade portion 211 : Sleeve seat 231 , 2 3 2 : Bearing 2 7 : Shaft 221 : Air inlet 2 22 : Wall surface 26 : Collecting air passage 212: air outlet 223: flange 2 6 1 : inlet 251: ring portion 2 5 2 : bottom plate

Page 15 1281375

Page 16

Claims (1)

1281375 VI. Patent application scope 1. A heat dissipating device, comprising: a frame having at least one air inlet and at least one air outlet; and at least one moving blade portion disposed in the fan frame and having at least one blade group. Wherein the fan frame is composed of a first frame and a second frame, the first frame has a first extension extending axially toward the second frame, and an axial compression is formed in the frame Air duct. 2. The heat sink according to claim 1, wherein the change in the axial extent of the first extension gradually increases from the air outlet toward the air outlet end. 3. The heat sink of claim 1, wherein the second frame has a second extension extending axially toward the first frame to form a double-sided axial compression air duct. 4. The heat sink according to claim 3, wherein the change in the axial extent of the second extension gradually increases from the air outlet toward the air outlet end. 5. The heat sink of claim 3, wherein the first extension and the second extension have an axial extent that approximates zero near the wind outlet. 6. The heat sink of claim 3, wherein the first extension and the second extension extend axially symmetrically. 7. The heat sink of claim 1 or 3, wherein the fan frame has a radially compressed air passage. 8. The heat sink according to claim 1, wherein the moving blade portion is constituted by a ring portion, a bottom plate, a first blade group and a second blade group Page 17 1281375 VI. Scope of application for patents. 9. The heat sink device set according to claim 8 is extending downward from a periphery of the ring portion to the bottom plate group being disposed on the bottom plate surface. 10. The heat sink sheet set and the second blade set according to claim 8 are arranged in a staggered arrangement. 1 1. The number, shape or size of the fins of the heat dissipating device group and the second blade group as described in claim 8 of the patent application are the same. 1 2. The outer diameter or height of the fins of the heat dissipating device group and the second blade group according to claim 8 may be 1. 3. The heat dissipating device group and the second according to claim 8 The blade sets are connected to each other and partially connected. 1 4. The heat sink set and the second vane set as described in claim 8 are on the opposite side of the same portion of the bucket portion. 1 5. The heat sink device group and the second blade group described in claim 8 are arranged up and down. 1 6. The heat dissipating device set according to claim 8 is disposed on the periphery of the ring portion, the surface of the second blade plate. The heat dissipating portion, the bottom plate, the first blade group and the second blade group as described in claim 8 or claim 6 wherein the first leaf surface, the second leaf, wherein the first A leaf, wherein the first leaf may be the same or not, wherein the first leaf is the same or different. Wherein the first leaflet is completely detached or not at all, wherein the first leaf side is located at or in the blade, wherein the first leaf, wherein the first leaf group is disposed in the bottom device, wherein the ring can be integrally formed into Page 18 1281375 VI. Scope of application for patents. The heat dissipating device of claim 8 or 16, wherein the ring portion is integrally injection molded with the first blade group, and the bottom plate and the second blade group are integrally injection molded, and then combined into one. Complete lobe. The heat dissipating device of claim 1, wherein the first frame has a base for receiving the moving blade portion, and the at least one air inlet is formed on the second frame. The heat sink of claim 19, wherein the second frame has a wall extending toward the interior of the frame to separate the space within the frame to define an airflow path. 2 1. The heat sink of claim 20, wherein one end of the wall has a flange to define an inlet of the airflow passage. 2. The heat sink of claim 2, wherein the at least one blade group extends radially toward the vicinity of the inlet of the airflow channel. 2. The heat sink of claim 20, wherein the height of the gas collection channel and the height of the flow path through the bucket portion partially or completely overlap. 2. The heat sink of claim 20, wherein the gas collecting passage has a cross-sectional area substantially equal to a cross-sectional area of the air outlet. The heat dissipation device of claim 20, wherein the air inlet of the second frame further comprises a base portion and a plurality of flow guiding structures, wherein the plurality of flow guiding structures are disposed on the base portion and the wall surface In order to increase the wind pressure of the heat sink. 2 6. The heat sink according to claim 25, wherein the plurality Page 19 1281375 VI. Scope of Application The connection of the μ structure is fixed to the base or the wall. 27. The heat dissipating device of claim 25, wherein the plurality of V-hungry structures are strip-shaped, flat-plate-shaped, curved-arc or wing-shaped structures. The heat dissipating device according to claim 25, wherein the plurality of diversion 1 structures are connected between the base portion and the wall surface, and the other portion = the two ends are respectively connected to the base portion and the wall surface and the middle portion thereof Part is not connected, but forms a free end. A heat dissipating device according to claim 25, wherein the plurality of structural portions are connected to the base portion and the wall surface is connected; 面ίΓΓ; the other end is a free end, and the other portion is a - The other end is the free end. Wherein the diversion, wherein the diversion is as follows: the heat dissipation device according to claim 25 of the patent scope has an inclination angle. The shape of the heat sink 7 as described in claim 25 of the patent application is similar to the shape of the blade of the bucket portion. H 2nd 51, please describe the heat dissipation m towel. The first-I wood has a set of the same seat, which is used to set up a bearing on the inner side of the gold part to jointly support the foundation of the blade frame. 33. The first! The heat dissipation mentioned in the item can be a one-way air-inlet type blower, which is inverted;: 'there is a government, installed blower, centrifugal fan or axial flow type centrifugal fan, two-way air inlet 34. A diversion structure is disposed at the divergent air outlet of the patent scope. ·,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ..., device, which includes a drive Page 20 1281375 VI. Scope of Patent Application The moving device is sleeved on one of the sleeves of the first frame and coupled into the bucket to drive the bucket. 3 6. A heat dissipating device, comprising: a frame having at least one air inlet and at least one air outlet; and at least one moving blade portion disposed in the fan frame and having at least one blade group, wherein the fan frame The inner portion has an axially extending first extension portion, and an axial compression air passage is formed in the fan frame. The heat dissipating device of claim 36, wherein the change in the axial extent of the first extension gradually increases from the air outlet toward the end of the air outlet. The heat dissipating device of claim 36, wherein the fan frame further has an axially extending second extending portion corresponding to the first extending portion to form a double-sided axial compression air duct . The heat dissipating device of claim 38, wherein the change in the axial extent of the second extension gradually increases from the air outlet toward the end of the air outlet. The heat sink of claim 3, wherein the first extension and the second extension have an axial extent that approaches zero near the wind outlet. The heat dissipating device of claim 38, wherein the first extending portion and the second extending portion are axially extended in a vertically symmetrical manner. 4 2 The heat sink of claim 36, wherein the fan frame further has a radial compression duct. 4 3 · The heat sink according to claim 36, wherein the bucket Page 21 1281375 VI. Scope of Application The department consists of a ring, a bottom plate, a first blade set and a second blade set. 4. The heat sink of claim 43, wherein the first blade set extends downwardly from the periphery of the ring portion to the bottom plate surface, and the second blade set is disposed on the bottom plate surface. 4. The heat sink of claim 44, wherein the first blade set and the second blade set are arranged in a staggered arrangement. 4. The heat sink of claim 4, wherein the number of blades, shape or size of the first blade set and the second blade set may be the same or different. 4. The heat sink according to claim 43, wherein the outer diameter or height of the blades of the first blade group and the second blade group may be the same or different. 4. The heat sink according to claim 43, wherein the first blade group and the second blade group are connected to each other, partially connected or not connected at all. 4. The heat sink of claim 43, wherein the first blade set and the second blade set are on the same side of the bucket portion or on the opposite side of the bucket portion. The heat sink according to claim 43, wherein the first blade group and the second blade group are arranged in an upper and lower arrangement. 5. The heat sink of claim 43, wherein the first blade set is disposed on a periphery of the ring portion, and the second blade set is disposed on a surface of the bottom plate. 5 2. The heat sink according to claim 4, wherein the ring Page 22 1281375 VI. Patent Application Section, the bottom plate, the first blade set and the second blade set can be made in one piece injection molding. 5. The heat sink of claim 4, wherein the ring portion is integrally formed with the first blade group, and the bottom plate and the second blade group are integrally injection molded, and then combined into a complete Moving leaves. 5. The heat sink of claim 36, wherein the fan frame has a wall extending toward the interior of the frame and separating the space within the frame to define an airflow path. 5. The heat sink of claim 54, wherein one end of the wall has a flange to define an inlet of the collection air passage. 6. The heat sink of claim 5, wherein the at least one blade group extends radially toward the vicinity of the inlet of the airflow channel. The heat dissipating device of claim 54, wherein the height of the gas collecting passage and the height of the flow passage passing through the moving portion are partially or completely overlapped. The heat dissipating device of claim 5, wherein the gas collecting passage has a cross-sectional area substantially equal to a cross-sectional area of the air outlet. 5. The heat dissipating device of claim 36, wherein the air inlet of the fan frame further comprises a base portion and a plurality of flow guiding structures, wherein the plurality of guiding structures are disposed at the base portion and the Between the walls, to increase the wind pressure of the heat sink. The heat sink of claim 59, wherein the plurality of flow guiding structures are connected and fixed to the base or the wall. 6 1. The heat sink according to claim 59, wherein the plurality Page 23 1281375 VI. Scope of Application The structure of the diversion is strip-shaped, flat-plate-shaped, curved or wing-shaped. The heat dissipating device of claim 59, wherein the plurality of flow guiding structures are partially connected between the base and the wall surface, and the other portion is connected to the base and the wall respectively. The middle part is discontinuous and forms a free end. 6. The heat sink of claim 59, wherein the plurality of flow guiding structures are partially connected between the base and the wall surface, the portion being connected to the wall at one end and the free end at the other end. The other part is connected to the base at one end and the free end at the other end. 6. The heat sink of claim 59, wherein the plurality of flow guiding structures have an oblique angle. 6. The heat sink of claim 59, wherein the shape of the flow guiding structure is similar to the shape of the blade of the bucket portion. 6. The heat sink of claim 59, wherein the fan frame further has a sleeve for receiving a bearing, and a bearing is disposed on the inner side of the base to jointly support the bucket A shaft of the department. 6 7. The heat dissipating device according to claim 36, wherein the heat dissipating device can be a one-way air inlet type blower, an upside down centrifugal fan, a bidirectional air inlet type blower, a centrifugal fan or an axial flow fan. . The heat dissipating device of claim 36, wherein a flow guiding structure is disposed at the at least one air outlet. The heat dissipating device of claim 36, further comprising a driving device sleeved on one of the sleeves of the fan frame and coupled to the moving blade portion for driving the moving blade portion . Page 24